CN111843639A - Height adjusting device for work piece supporting device - Google Patents

Abstract

The invention provides a height adjusting device for a work piece supporting device. A work piece supporting device is provided with: a work table; a first work support table which is placed on the table and has a support member for supporting one end of a work; and a second work support table having a support member for supporting the other end of the work, wherein at least one of the first work support table and the second work support table has a main body portion having the support member, and a base portion disposed between the main body portion and the table.

Description

Height adjusting device for work piece supporting device

Technical Field

The present invention relates to a height adjustment device for a work support device. More specifically, the present invention relates to a height adjustment device for a workpiece support device including a first workpiece support table (e.g., a headstock) mounted on a table of a machine tool and having a support for supporting one end of a workpiece (workpiece) to be machined, and a second workpiece support table (e.g., a tailstock) having a support for supporting the other end of the workpiece.

Background

A machine tool such as a cylindrical grinding machine generally includes a headstock for supporting one end of a workpiece (workpiece) to be ground and a tailstock for supporting the other end of the workpiece. The headstock and tailstock are mounted on a table of a machine tool. The work is supported by a support member provided in the headstock and the tailstock for supporting the work, and the work is held between the headstock and the tailstock.

The workpiece is machined by a machining tool such as a grinding wheel while being held between the headstock and the tailstock, but the holding state of the workpiece affects the machining accuracy of the workpiece, and therefore, it is required to accurately position the workpiece with respect to the holding state of the headstock, the tailstock, and the grinding wheel, which are positional relationships of the headstock and the tailstock.

For the adjustment of the positioning, the adjustment in the height direction is performed by adjusting the displacement in the height direction of the supports provided on the headstock and tailstock from the table. In the present situation, the amount of displacement in the height direction is adjusted by cutting the installation surface of the headstock or tailstock on the table.

Patent document 1: japanese laid-open patent publication No. 11-19806

However, in the above, the adjustment of the amount of displacement in the height direction of the held state of the workpiece by the headstock and the tailstock is performed by cutting (running-in) the installation surface of the headstock or the tailstock to the table. Therefore, this operation is very troublesome. That is, since adjustment is performed by cutting the installation surface, a cutting operation is required, and therefore, a grinding operation of cutting the installation surface is performed by lifting up a headstock or tailstock placed on a table by a crane, inverting the headstock or tailstock to the installation surface to be located above the installation surface. Therefore, there is a problem that a crane apparatus, a reversing tool, and the like are required and it takes a working time.

In addition, when this adjustment method is adopted, since the mounting surface of the headstock or tailstock on which the support member is positioned is cut, it is inconvenient in that adjustment in only the lowering direction can be performed.

Disclosure of Invention

The present invention has been made in view of the above problems, and an object of the present invention is to easily adjust a height direction of a support position of a workpiece in a state where a workpiece support table for supporting the workpiece is installed on a table without performing a lifting operation using a crane device or the like.

In order to solve the above problem, the height adjustment device for a work piece support device according to the present invention employs the following means.

A first aspect of the present invention is a height adjustment device for a work piece support device, the work piece support device including: a work table; a first work support table which is placed on the table and has a support member for supporting one end of a work; and a second workpiece support table having a support member for supporting the other end of the workpiece, wherein at least one of the first workpiece support table and the second workpiece support table includes: a main body portion provided with the support member; and a base portion disposed between the main body portion and the table, wherein a height adjusting means for adjusting a height-directional interval between the main body portion and the base portion is provided between the main body portion and the base portion, and the height position of the support member with respect to the table can be adjusted by the height adjusting means.

According to the first aspect of the invention, the height position of the support of the work piece support table can be adjusted from the work table by the height adjusting means. This makes it possible to reliably position the workpiece supported by the first and second workpiece support tables.

The height adjusting means is located between the main body portion and the base portion of at least one of the first work support table and the second work support table. Therefore, the adjustment work can be performed in the state where the work support table is installed on the table without performing the lifting work using a crane facility or the like as in the conventional art.

A second aspect of the present invention is the work piece supporting apparatus of the first aspect of the present invention, wherein the three arch bolts of the height adjusting means are arranged in a triangular shape. In the present invention, an arch bolt is a bolt having a shaft portion protruding from an end face of a portion to which the bolt is screwed, and is a bolt having a configuration in which the length of the protruding shaft portion changes according to a change in the screwed state of the bolt.

According to the second invention, the height adjustment is performed by the three arch bolts arranged in a triangular shape. By adjusting the height of each of the three arch bolts, the distance between the base and the main body can be adjusted in all directions. This improves the degree of freedom in adjusting the height position of the support for supporting the work.

A third aspect of the present invention is the height adjustment device of the work piece support device according to the second aspect of the present invention, wherein the center of gravity of the one of the work piece support bases is set within a triangular region formed by the three arch bolts.

According to the third aspect of the present invention, the center of gravity of the work piece support base is set within the area of the triangle formed by the three arch bolts. This makes it possible to place the main body in a stable arrangement with respect to the base, and this adjustment operation can be performed easily and reliably.

A fourth aspect of the present invention is the height adjustment device for a work piece support device according to any one of the first to third aspects of the present invention, wherein a constricted portion is formed in the main body portion of the work piece support base including the height adjustment means, at a position in the vicinity of a portion connecting the main body portion and the base portion.

According to the fourth aspect of the present invention, the constricted portion is formed in the main body portion in which the support member is located, whereby the position of the support member can be minutely bent and deformed, and the work can be supported with higher accuracy.

A fifth aspect of the present invention is the height adjustment device for a work piece support device according to any one of the first to fourth aspects, wherein one of the first and second work piece support tables is a tailstock.

According to the fifth aspect of the present invention, the height adjustment device for a work piece support device according to the present invention can be suitably applied to a tailstock of a machine tool.

[ Effect of the invention ]

According to the present invention as described above, the height direction adjustment of the support position of the workpiece can be easily performed in the state where the workpiece support table for supporting the workpiece is installed on the table without performing a lifting operation using crane equipment or the like.

Drawings

Fig. 1 is a schematic view showing the concept of the overall structure of a cylinder grinding machine and showing a state in which the rotational axes of a headstock and a tailstock are different.

Fig. 2 is a schematic view showing a state where the rotation axes of the headstock and the tailstock are aligned by the height adjustment mechanism from the state of fig. 1.

Fig. 3 is a perspective view of the entire tailstock according to the present embodiment, as viewed from the front and upper right side.

Fig. 4 is a perspective view of the state of fig. 3 viewed from above on the left and right opposite sides.

Fig. 5 is a plan view of the entire tailstock according to the present embodiment as viewed from above.

Fig. 6 is a side view seen from VI of fig. 5 in the viewing direction.

Fig. 7 is a side view seen from VII of fig. 5 in the viewing direction.

Fig. 8 is a side view seen from VIII of fig. 5 in the viewing direction.

Fig. 9 is a perspective view showing fig. 4 in a section from IX to IX.

Fig. 10 is a perspective view showing fig. 4 in a cross section taken along X-X.

Fig. 11 is a schematic configuration diagram showing an operation state of a taper adjusting lever in the fine adjustment mechanism.

Fig. 12 is a schematic configuration diagram showing a rotation state of the support of the tailstock by the neck in the fine adjustment mechanism.

Fig. 13 is a perspective view showing a schematic structure of a specific example of the grinding machine.

Fig. 14 is a side view of the grinding machine shown in fig. 13.

Fig. 15 is a top view of the grinding machine shown in fig. 13.

Description of reference numerals:

10 … cylindrical grinder; 11 … stand; 12 … a workbench; 14 … headstock (first work piece support table); 16 … tailstock (second work piece support table); 18 … grinding wheel table; 20 … (of the headstock); 22 … (tailstock) support; 24 … grinding wheel; 26 … a body portion; 28 … a base portion; 30 … height adjusting mechanism (height adjusting means); 32 … center distance adjusting mechanism; 34 … motor; 36 … ball screw shaft; 38 … a linking member; a 40 … slider; 42 … a lower cover body; 44 … bolt; 48 … left recess; 50 … right side recess; 52 … first mounting hole; 54 … a first mounting member; 56 … bolt; 58 … second mounting hole; 60 … second mounting member; 62 … third mounting hole; 64 … fixing bolts; 66 … connecting bolts; 68 … a body portion connecting portion; 70 … base connection point; 72 … through holes; 74 … twist holes; 76 … necking; 78 … fine adjustment mechanism; 80 … taper adjustment handle; 81 … advancing and retreating rod; b1 … first arch bolt (arch bolt); b2 … second arch bolt (arch bolt); b3 … third arch bolt (arch bolt); c1 … axis of rotation of the bearing of the headstock; the axis of rotation of the support of the C2 … tailstock; w … workpiece (work piece).

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the present embodiment will be described by taking a machine tool of a cylindrical grinder as an example. Hereinafter, the axial direction indicated by an arrow in each drawing indicates each direction in the machine tool. The X-axis represents the movement direction of the grinding wheel 24 of the grinding wheel table 18, the Y-axis represents the height direction of the machine tool, and the Z-axis represents the axial direction of the support 22 of the tailstock 16.

[ integral Structure of embodiment ]

First, the concept of the overall configuration of the present embodiment will be described. Fig. 1 and 2 are schematic diagrams showing an overall configuration of the cylinder grinder 10. The barrel grinding machine 10 has a headstock 14 and a tailstock 16 mounted on a flat table 12. The headstock 14 and the tailstock 16 are provided with supports 20 and 22 for supporting the workpiece W, respectively. The workpiece W is supported by the supports 20 and 22, and held between the headstock 14 and the tailstock 16. In the following description, the workpiece W is referred to as a workpiece W. The workpiece W of the present embodiment has a cylindrical shape. The workpiece W is ground by the grinding wheel 24 of the grinding wheel table 18 disposed between the headstock 14 and the tailstock 16. In fig. 1 and 2, the grinding wheel table 18 and the grinding wheel 24 are shown by imaginary lines.

The cylindrical grinding machine 10 is configured to hold the workpiece W by the headstock 14 and the tailstock 16. Since the holding state of the workpiece W affects the machining accuracy of the workpiece W, the positional relationship among the support 20 of the headstock 14, the support 22 of the tailstock 16, and the grinding wheel 24 of the grinding wheel table 18 is required to have a high-accuracy positional relationship. Therefore, in a stage where the machine tool manufacturer manufactures the barrel grinding machine 10, the position of each barrel grinding machine 10 in the height direction is adjusted, and then the adjusted position is supplied to the user.

As shown in fig. 1, when there is a deviation in the height direction between the rotation axis C1 of the support 20 of the headstock 14 and the rotation axis C2 of the support 22 of the tailstock 16, it is necessary to adjust the position in the height direction so that the rotation axes C1 and C2 of both coincide with each other (see fig. 2). In the present embodiment, the height adjustment is performed by the tailstock 16.

The tailstock 16 of the embodiment of fig. 1 includes a main body 26 having a support 22, and a base 28 disposed between the main body 26 and the table 12. Further, a height adjustment mechanism 30 is disposed between the main body portion 26 and the base portion 28. In fig. 1, the height adjustment mechanism 30 is located at a position indicated by a broken line across the boundary between the main body portion 26 and the base portion 28. The height adjusting mechanism 30 corresponds to the height adjusting means of the present invention.

The specific structure of the height adjustment mechanism 30 is described in detail in the specific embodiment of the tailstock 16 described later, and the height adjustment mechanism 30 is a mechanism capable of adjusting the distance between the main body 26 and the base 28 in the height direction. Thus, the height of the support 22 of the tailstock 16 from the table 12 can be adjusted, and as shown in fig. 2, the rotation axis C2 of the support 22 of the tailstock 16 can be made to coincide with the rotation axis C1 of the support 20 of the headstock 14.

[ concrete constitution example of tailstock ]

Fig. 3 to 10 show an example of a detailed structure of an embodiment of the tailstock 16 provided with the height adjustment mechanism 30. The overall structure of the tailstock 16 is shown in fig. 3 to 8. Fig. 3 is a perspective view of the entire structure of the tailstock 16 viewed from the right front side. Fig. 4 is a perspective view of fig. 3 viewed from above on the left and right opposite sides. Fig. 5 is a plan view of the entire structure as viewed from above. Fig. 6 is a side view seen from VI of fig. 5 in the viewing direction. Fig. 7 is a side view in the view direction from VII in fig. 5. Fig. 8 is a side view as viewed from VIII of fig. 5. The height adjustment mechanism 30 is best shown in fig. 4, 7, 9, and 10. Fig. 9 is a perspective view taken in a section from IX to IX of fig. 4, and fig. 10 is a perspective view taken in a section from X to X of fig. 4. Note that components corresponding to those shown in fig. 1 and 2 are denoted by the same reference numerals.

The tailstock 16 is mounted on and disposed on the table 12 (see fig. 1 and 2) not shown in the above figures. The tailstock 16 is constituted by a slide 40, a main body 26, and a base 28. The main body portion 26 and the base portion 28 are formed of different members, and are disposed in a vertically overlapping state as best shown in fig. 9 and 10. The base 28 is located on the table 12 and is disposed between the table 12 and the main body portion 26. The height adjustment mechanism 30, which will be described later, is disposed so that the vertical distance between the base 28 and the body 26 can be adjusted.

As best shown in fig. 4, the main body 26 includes a support member 22 for supporting the workpiece W. Further, a known center distance adjusting mechanism 32 for supporting the workpiece W on the support 20 of the headstock 14 and the support 22 of the tailstock 16 is disposed at a position on the opposite side of the main body 26 from the position where the support 22 is provided.

Since the center distance adjusting mechanism 32 is well known, a detailed description thereof is omitted, and the ball screw shaft 36 is rotated by the motor 34 provided in the body portion 26, and the nut built in the coupling member 38 is moved in the axial direction by the ball screw shaft 36. A coupling member 38 is coupled to a rear end of the slider 40, and the slider 40 is supported by the body portion 26 so as to be movable about the rotation axis C2.

As shown in fig. 3, a lower cover 42 is disposed below the center distance adjustment mechanism 32, and the lower cover 42 is fixed to the main body 26 of the tailstock 16 by a fastener such as a bolt 44.

[ height adjustment mechanism 30 ]

The height adjusting mechanism 30, which is a feature in the present embodiment, is located between the main body portion 26 and the base portion 28 of the tailstock 16. In the present embodiment, the height adjusting mechanism 30 is constituted by three arch bolts, i.e., a first arch bolt B1, a second arch bolt B2, and a third arch bolt B3. These three arch bolts B1, B2, and B3 correspond to the arch bolts of the present invention. The first arch bolt B1 and the second arch bolt B2 are shown in fig. 4, 7, 9, and 10, and the third arch bolt B3 is shown in fig. 8, 9, and 10.

As best shown in fig. 4 and 7, the first arch bolt B1 and the second arch bolt B2 are arranged in the same manner. The arrangement positional relationship is an arrangement positional relationship parallel to the axis C2 of the support 22 of the tailstock 16, and is located at a side surface position on the front side as viewed in fig. 4. The first raising bolt B1 and the second raising bolt B2 are arranged at a constant interval.

As best shown in fig. 9 and 10, the third arch bolt B3 is disposed at a position near the side surface opposite to the intermediate position between the first arch bolt B1 and the second arch bolt B2, as viewed in the direction of the axis C2 (Z-axis direction) of the support 22 of the tailstock 16. Thus, the first arch bolt B1, the second arch bolt B2, and the third arch bolt B3 are arranged at the apex of the triangle.

In the present embodiment, the tailstock 16 is set in the triangular region formed by the first to third arch raising bolts B1, B2, and B3, and the center of gravity of the main body 26 of the tailstock 16 is accurately set.

Next, the arrangement structure of the first raising bolt B1 and the second raising bolt B2 will be described. As best shown in fig. 4, both the first raising bolt B1 and the second raising bolt B2 are screwed to the base 28 of the tailstock 16 in the vertical direction. The first raising bolt B1 is disposed so as to be screwed to the bottom surface of the left recess 48 formed in the upper surface of the base 28. The second arch bolt B2 is disposed so as to be screwed to the bottom surface of the right recess 50 formed in the upper surface of the base 28.

The first and second arch raising bolts B1 and B2 and the bolt heads B1h and B2h thereof are disposed in a state of being in contact with the lower surface of the main body portion 26 of the tailstock 16. Therefore, by changing the screwed state of the first arch bolt B1 and the second arch bolt B2 with respect to the base 28, that is, the heights of the bolt heads B1h and B2h, the vertical distance between the base 28 and the body 26 is changed.

As shown in fig. 9 and 10, the third arch-raising bolt B3 is disposed in a state of being screwed to the main body portion 26 of the tailstock 16. Specifically, a first mounting member 54 having a T-shaped vertical cross-sectional shape is fitted into a first mounting hole 52 formed in the main body portion 26, and the first mounting member 54 is fixed to the flange portion 54A by a fastener such as a bolt 56. A second mounting member 60 is fitted into a second mounting hole 58 formed in the center of the first mounting member 54. The first mounting member 54 and the second mounting member 60 are fitted to each other by screwing the flange portion 54A in the second mounting hole 58 of the first mounting member 54 in the vertical direction. A third arch-raising bolt B3 is screwed into a third mounting hole 62 formed in the center of the second mounting member 60. Further, the third mounting hole 62 is threaded throughout its length.

The lower end of the third arch bolt B3 is disposed to protrude from the lower surface of the second mounting member 60. The bolt head B3h formed at the upper end of the third arch bolt B3 is arranged at a distance from the upper surface of the second mounting member 60. Further, the fixing bolt 64 is screwed to the base 28 and fixed to a lower portion of the third arch bolt B3. The lower end of the third arch bolt B3 is disposed in contact with the upper surface of the head 64h of the fixing bolt 64. Thus, by changing the state of the third arch-raising bolt B3 screwed to the main body portion 26, specifically, by changing the state of the position of the third arch-raising bolt B3 screwed to the second attachment member 60, the vertical distance between the base 28 and the main body portion 26 can be changed.

In order to properly bring the lower end of the third arch-raising bolt B3 into contact with the fixing bolt 64, in the present embodiment, the upper surface of the head of the fixing bolt 64 is planar, and the lower end of the third arch-raising bolt B3 is spherical. The fixing bolt 64 is made of a material harder than the base 28.

The main body 26 and the base 28 of the tailstock 16 are fixedly coupled to each other by three coupling bolts 66 shown in fig. 4. As shown in fig. 9 and 10, which are cross-sectional structures showing the coupled state, the coupling bolt 66 is disposed across a body coupling portion 68 located on a lower end side portion of the body 26 and a base coupling portion 70 located in a central portion of the base 28. The connecting bolt 66 is disposed in a direction perpendicular to the axial direction of the support 22 of the tailstock 16, and is screwed and connected to a through hole 72 formed in the body connecting portion 68 and a screwing hole 74 formed in the base connecting portion 70. The through-holes 72 are loosely fitted, and the height adjustment direction of the first arch bolt B1, the second arch bolt B2, and the third arch bolt B3 can be adjusted in the vertical direction, and the adjustment can be performed in a state where the three connecting bolts 66 are loosened.

In the present embodiment, a constricted portion 76 is formed between the main body portion connecting portion 68 of the main body portion 26 connected to the base portion 28 and the support 22, and the constricted portion 76 can absorb bending deformation caused by height adjustment (taper adjustment) by a fine adjustment mechanism 78 described later in a state where the three connecting bolts 66 are fastened. As seen in fig. 9 and 10, the constricted portions 76 are formed at positions near the body portion connecting portion 68 and on both sides of positions immediately above the body portion connecting portion 68.

Further, the fine adjustment mechanism 78 is incorporated in the third arch bolt B3, and a user who purchases the machine tool of the present embodiment can perform fine adjustment (taper adjustment) in the height direction. Fig. 11 and 12 show a conceptual configuration of the fine adjustment mechanism 78 in the present embodiment. Fig. 11 shows a conceptual mechanism in which the height adjustment of the second mounting member 60 with respect to the main body portion 26 is performed by rotating the taper adjustment lever 80 shown in fig. 3, 5, 8, and the like, advancing and retreating the advancing and retreating lever 81 in the rotational axis direction of the taper adjustment lever 80, and rotating the second mounting member 60 shown in fig. 9 and 10. The advancing-retreating lever 81 engages with the second mounting member 60 in the advancing-retreating direction and allows rotation of the second mounting member 60.

Fig. 12 shows a conceptual configuration of a mechanism for fine-adjusting the position of the support 22 by adjusting the height of the second mounting member 60 relative to the main body portion 26 by the fine adjustment mechanism 78 shown in fig. 11. As shown in fig. 12, the height of the second mounting member 60 relative to the main body 26 is adjusted, so that the constricted portion 76 is bent and deformed, and the main body 26 swings in the arrow direction. This adjusts the position of the support 22 provided in the main body 26.

Further, since the fine adjustment mechanism 78 is adjusted (taper adjustment: for machining the workpiece W into a tapered shape) after the machine tool is delivered to a user (user), the position of the taper adjustment handle 80 is set to the front position of the machine tool, and the user can easily perform the operation and adjustment. That is, the position of the taper adjusting handle 80 is set to a range within which a worker who operates and uses the machine tool can reach the machine tool from a standing position. Since the rotation of the taper adjusting handle 80 is transmitted and decelerated as the axial movement of the advancing/retreating lever 81 and the rotation of the second mounting member 60, the taper adjustment can be finely performed. Since the third arch bolt B3 is disposed on the rotation axis of the second mounting member 60, the arrangement position can be shared, the size can be reduced, and the number of components can be reduced.

[ action and Effect of the height adjusting mechanism 30 ]

Next, the height adjustment operation by the height adjustment mechanism 30 constituted by the three arch bolts B1, B2, and B3 will be described. The height adjustment work by the height adjustment mechanism 30 is performed at the stage when the manufacturer of the manufacturing machine tool manufactures the machine tool. I.e. at a stage prior to delivery of the machine to the user.

The height adjustment is performed by changing the screwing state of each of the three arch bolts, i.e., the first arch bolt B1, the second arch bolt B2, and the third arch bolt B3. In each of fig. 3 to 12, as described above, the axial direction of the support 22 of the tailstock 16 is represented as the Z axis, the height direction (plumb direction) is represented as the Y axis, and the direction perpendicular to both the Z axis and the Y axis is represented as the X axis. Therefore, by changing the screwing state of the three arch bolts B1, B2, and B3, the height of the three arch bolts B1, B2, and B3 in the Y axis direction at each position is adjusted.

Further, the height adjustment of the tailstock 16, that is, the position adjustment of the support 22 provided in the tailstock 16 can be adjusted as follows by the height adjustment of the three arch bolts B1, B2, and B3.

First, the three arch bolts B1, B2, and B3 are adjusted by the "same amount" to adjust in the Y-axis direction.

Next, the main body portion 26 is rotated about the center line P1 of the constricted portion 76 by adjusting only the second mounting member 60. Namely, the taper adjustment is performed. The center line P1 passes through the center of the constricted portion 76 and is parallel to the rotation axis C2. The centerline P1 lies within a plumb plane containing the axis of rotation C2.

Next, the adjustment amount is adjusted by different amounts such that "first arch bolt B1 > third arch bolt B3 > second arch bolt B2" and "first arch bolt B1 > second arch bolt B2 > third arch bolt B3", thereby performing rotational adjustment with respect to the X axis. Namely, so-called slide adjustment is performed.

The height adjustment is performed in a state where the fastening state of the fastening bolt 66 that connects and fixes the main body portion connecting portion 68 and the base portion connecting portion 70 is loosened. Thus, the adjustment of the separation distance between the main body 26 and the base 28 is performed without being affected by the fastening state of the fastening bolt 66 in each of the above-described adjustments. Therefore, the position adjustment in the height direction can be performed with high accuracy. After the adjustment, the fastening bolt 66 is tightened to fix the body portion fastening portion 68 and the base portion fastening portion 70, and the body portion 26 and the base portion 28 are fastened.

The adjustment work is performed in a state where the tailstock 16 is placed on the table 12. Therefore, the height direction can be easily adjusted without accompanying a lifting operation using a crane apparatus or the like as in the related art.

Further, since the height adjusting mechanism 30 of the present embodiment is configured by three arch bolts B1, B2, and B3, it can be realized by a relatively simple structure.

The three arch bolts B1, B2, and B3 constituting the height adjustment mechanism 30 according to the present embodiment are arranged to form a triangle, and the center of gravity of the tailstock 16 is located within the area of the triangle. This allows the main body 26 to be stably placed on the base 28, and therefore, the adjustment operation can be stably performed.

[ action, Effect of Fine adjustment ]

Next, fine adjustment (taper adjustment) will be described. The fine adjustments are adjustments made by the user after the machine is delivered to the customer. First, as described with reference to fig. 11 and 12, the height of the second mounting member 60 relative to the main body portion 26 is adjusted by rotating the taper adjustment handle 80 shown in fig. 11 to rotate the second mounting member 60 about the third arch raising bolt B3. As shown in fig. 12, when the height of the third arch bolt B3 is adjusted, the constricted portion 76 is bent and deformed, and the main body portion 26 swings in the arrow direction about the center line P1. This finely adjusts the position of the support 22 provided in the body 26. The fine adjustment is usually performed in a state where the connection bolt 66 is fastened and connected to the body portion connection portion 68 and the base portion connection portion 70.

In the present embodiment, a taper adjusting handle 80 for fine adjustment is provided at a front position of the machine tool. Therefore, the user using the machine tool can easily perform fine adjustment.

[ integral Structure of cylindrical grinder 10 (FIGS. 13 to 15) ]

Next, a specific embodiment showing the overall configuration of the cylinder grinding machine 10 that can be provided with the height adjusting device of the present embodiment will be described with reference to fig. 13 to 15. In the present embodiment, the tailstock 16 is provided with a height adjustment device, but the height adjustment device is not shown for convenience. In the present embodiment, the same reference numerals are given to the components corresponding to the components of the above embodiments and shown.

The barrel grinding machine 10 of the present embodiment includes a bed 11, a table 12, a headstock 14, a tailstock 16, a grinding wheel table 18, and the like. In the drawings shown in fig. 13 to 15, in which the X axis, the Y axis, and the Z axis are described, as in the case of the above-described embodiments, the X axis, the Y axis, and the Z axis are orthogonal to each other, the Y axis direction indicates the position above the plumb bob, the X axis direction indicates the horizontal direction in which the grinding wheel 24 cuts into the workpiece W, and the Z axis direction indicates the horizontal direction parallel to the rotation axis C1 of the support member 20. In this example, the workpiece W is cylindrical. The shape of the work W is not limited to this shape, and may be a cylindrical shape, a cylindrical shape with a plurality of steps, a partially conical shape, or the like.

The base 11 is formed in a T shape in plan view, and has Z-axis guide surfaces 112 and 112V extending in the Z-axis direction and a Z-axis slit 112K extending in the Z-axis direction. In addition, the housing 11 is provided with X-axis guide surfaces 115 and 115V extending in the X-axis direction, and an X-axis slit 115K extending in the X-axis direction.

[ grinding wheel table 18 ]

The grinding wheel table 18 is mounted on the bed 11, is supported by the X-axis guide surfaces 115 and 115V by static pressure guide, and is capable of reciprocating in the X-axis direction. The grinding wheel table drive motor 150M rotates the ball screw 150B (see fig. 14) based on a control signal from the control device 180. The control device 180 controls the position of the grinding wheel table 18 in the X-axis direction by controlling the grinding wheel table drive motor 150M while detecting the position of the grinding wheel table 18 in the X-axis direction based on a detection signal from the encoder 150E (rotation detection means). As shown in fig. 14, a nut 150N is fitted to the ball screw 150B, and the nut 150N is connected to the grinding wheel table 18 via an arm 150A inserted through the slit 115K (see fig. 13). Therefore, when the grinding wheel table driving motor 150M rotationally drives the ball screw 150B, the position of the nut 150N in the X axis direction moves, and the grinding wheel table 18 connected to the nut 150N via the arm 150A moves in the Z axis direction along the X axis guide surfaces 115 and 115V.

The grinding wheel table 18 is provided with a grinding wheel spindle 154 and a grinding wheel motor 155M supported to be rotatable about a grinding wheel rotation axis C3 parallel to the Z-axis direction. Further, as shown in fig. 15, the wheel rotation axis C3 and the spindle rotation axis C1 are both parallel to the Z-axis, and as shown in fig. 14, the wheel rotation axis C3 and the spindle rotation axis C1 are located on the same imaginary horizontal plane VM.

The grinding wheel motor 155M is provided with a large-diameter pulley 151. The grinding wheel 24 is attached to one end of the grinding wheel spindle 154, and the small-diameter pulley 152 is attached to the other end of the grinding wheel spindle 154. A belt 153 for transmitting power is wound around the large-diameter pulley 151 and the small-diameter pulley 152.

The grinding wheel 24 has a circular cross section cut in a plane perpendicular to the grinding wheel spindle 154, CBN abrasive grains are fixed to the outer peripheral surface of the grinding wheel 24 by an adhesive, electrodeposition, or the like, and the grinding wheel 24 and the grinding wheel spindle 154 rotate integrally about the grinding wheel rotation axis C3. Further, a coolant nozzle for discharging a coolant for cooling and lubrication toward the grinding point K of the grinding wheel 24 is provided above the grinding wheel 24, which is not shown.

[ working table 12 ]

The table 12 is placed on the bed 11, is supported by the Z-axis guide surfaces 112 and 112V by static pressure guide, and is capable of reciprocating in the Z-axis direction. The table drive motor 120M rotates a ball screw (not shown) based on a control signal from the control device 180. A nut (not shown) is fitted to the ball screw, and the nut is connected to the table 12 via an arm (not shown) inserted through the slit 112K. Therefore, when the table driving motor 120M rotates and drives the ball screw, the Z-axis position of the nut moves, and the table 12 connected to the nut via the arm moves in the Z-axis direction along the Z-axis guide surfaces 112 and 112V. A headstock 14 is fixed to one end of the table 12 in the Z-axis direction, and a tailstock 16 is fixed to the other end.

[ spindle table 14 ]

The headstock 14 includes: a spindle 132 that rotates about a spindle rotation axis C1 parallel to the Z-axis direction; a center 132 having the spindle rotation axis C1 as a center axis; a spindle motor 131M (corresponding to a spindle drive motor) that rotationally drives the spindle 132; and an encoder 131E, etc. A driver metal 133 for connecting the main shaft 132 and the workpiece W is attached to the main shaft 132. The driver metal tool 133 has a grip 133A for gripping the workpiece W and a connection portion 133B for connecting the grip 133A and the support 20, and rotates the workpiece W integrally with the support 20 around the spindle rotation axis C1.

[ tailstock 16 ]

The tailstock 16 includes a support (center) 22 having a rotation axis C2 as a center axis, and a slide 40 that accommodates the support (center) 22 and is biased in a direction toward the headstock 14. The center axis of the center piece 22 of the tailstock 16 and the center axis of the center piece 132 of the headstock 14 both coincide with the spindle rotation axis C1. The workpiece W clamped by the center 132 and the center 22 is pressed against the headstock 14 side by the center 22, and is rotated about the spindle rotation axis C1 by the rotation of the support 20 and the drive metal 133.

[ other embodiments ]

Although the present invention has been described above with reference to specific embodiments, the present invention can be implemented in other various forms.

For example, the above embodiment is a case where the work support device of the present invention is applied to a cylindrical grinding machine, but the present invention can also be applied to other machine tools.

In the above embodiment, the height adjusting mechanism 30 is provided to the tailstock 16, but may be provided to the headstock 14. Further, the tailstock 16 and the headstock 14 may be both provided.

In the above embodiment, the height adjusting mechanism 30 is constituted by the arch raising bolts B1, B2, and B3, but may be constituted by another mechanical mechanism.

Claims (5)

1. A height adjusting device for a work piece supporting device,

the work support device includes:

a work table;

a first work support table which is placed on the table and has a support member for supporting one end of a work; and

a second work piece support table having a support member for supporting the other end of the work piece,

at least one of the first work piece support table and the second work piece support table includes a main body portion having the support member, and a base portion disposed between the main body portion and the table,

Height adjusting means for adjusting the height-directional interval between the main body and the base,

the height position of the support relative to the table can be adjusted by the height adjustment unit.

2. A work support height adjustment apparatus according to claim 1,

the height adjusting unit is formed by arranging three arch-forming bolts in a triangular shape.

3. A work support height adjustment apparatus according to claim 2,

the center of gravity of the work support having the height adjustment means is set within the area of the triangle formed by the three arch bolts.

4. A work piece support apparatus height adjustment apparatus according to any one of claims 1 to 3, wherein,

a constricted portion is formed in the main body portion of the work support table including the height adjustment means, at a position near a portion connecting the main body portion and the base portion.

5. A work support apparatus height adjustment apparatus according to any one of claims 1 to 4, wherein,

one of the first workpiece support table and the second workpiece support table is a tailstock.

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