TWI410381B - Method and device for cutting glass crucible - Google Patents

Abstract

The present invention is to provide a method and a device that is possible to cut a rim of a glass crucible smoothly without damaging to a cut section. A glass crucible cutting device is provided with a cutting blade 10 having a disc-shape and provided horizontally to the crucible; a cutting blade moving mechanism for moving the cutting blade 10 in circumferential direction of the crucible; and a rotary mechanism for rotating the crucible 20. A rim 25 of the crucible 20 is cut by forming a slit that penetrate through a wall of the crucible by pushing the rotating cutting blade 10 to the wall of the crucible in the wall thickness direction without moving the cutting blade in the circumferential direction, and moving the cutting blade 10 in the circumferential direction of crucible 20 while keeping the condition that the cutting blade penetrate through the wall part of the crucible.

Description

Glass crucible cutting method and cutting device

The present invention relates to a cutting method and apparatus for smoothly cutting an edge portion (opening edge portion) of a glass crucible. More specifically, the present invention relates to a cutting method and apparatus for smoothly cutting an edge portion or the like of a quartz glass crucible or the like used for pulling a single crystal of a single crystal without causing damage to the edge portion of the cut portion.

In the pulling of the single crystal, a quartz glass crucible filled with a crucible is used. The glass crucible is mainly produced by a rotational molding method by uniformly depositing quartz powder on the inner surface of a rotating mold and heating and melting it to vitrify. In this manufacturing method, the edge portion (edge portion) of the opening of the crucible is liable to become irregular, so that the edge portion is cut after the production to form a product. In the past, the edge portion was cut by a manual operation. However, as the size of the crucible was increased, the burden of the cutting work at the edge portion increased, and the cutting operation was mechanized in order to reduce the burden.

An edge cutting device is known as a cutting device for a glass crucible, characterized in that it has a holding unit for a crucible and a cutting unit for the edge; the holding unit has a freely opening and closing arm for holding the crucible and a rotating up and down moving unit thereof; The cutting unit has a cutting edge and a moving unit thereof; preferably, the centering mechanism of the crucible and the discharging mechanism of the cut edge are continuously performed, and the cutting from the centering of the crucible to the cutting of the edge and the discharge of the edge are continuously performed. A series of steps (refer to Patent Document 1).

The edge cutting device can mechanically cut the edge of the glass crucible with high precision, and for a large glass crucible, the edge can be cut in a short time. Further, since a series of operations from the centering of the centering to the discharge of the cut edge can be performed automatically, there is an advantage that the work efficiency can be greatly improved.

On the other hand, when cutting the edge portion of the glass crucible, as shown in Fig. 6, the following method is performed: the rotating cutting edge 10 is pressed against the side wall outer surface 21 of the crucible 20, and the crucible 20 is rotated while the cutting edge 10 is oriented. The inside of the crucible advances to cut the wall.

According to the above cutting method, the cutting groove 28 extending along the entire circumference of the crucible is formed on the outer surface 21 of the crucible, and the cutting groove 28 travels toward the thickness direction of the wall, and the end portion of the cutting becomes the inner surface 22 of the crucible, so that the cutting is performed The weight of the edge portion 26 is concentrated on the thin cutting surface of the inner surface 22 of the crucible and is prone to cracking. The cutting edge portion of the inner surface is broken, and the cutting burr 23 and the defect are easily generated on the inner surface of the crucible as shown in FIG. Part 24. The cutting blade 10 is pressed against the inner surface of the crucible, and the cutting edge 10 is advanced toward the outer surface to be cut.

[Patent Document 1] Japanese Patent Laid-Open No. 2001-226134

The present invention solves the above problems in the conventional cutting method, and provides a cutting method and a cutting device which can smoothly cut an edge portion or the like without causing damage at the edge portion of the cut portion or the like.

The present invention relates to a cutting method and a cutting device which solve the above problems by the following constitution.

[1] A method for cutting a glass crucible, characterized in that a slit passing through a wall portion of a crucible is formed by a cutting edge, and a state in which a cutting edge penetrates the wall portion is maintained, and the cutting edge is relatively moved in a circumferential direction of the crucible The slit is extended to the entire circumference of the crucible, thereby cutting the edge portion of the crucible.

[2] The method for cutting a glass crucible according to the above [1], wherein the cutting blade is rotated so that the rotating cutting blade contacts the crucible wall surface and advances in the thickness direction to form a slit penetrating the crucible wall portion, thereby maintaining the cutting edge penetrating The state of the wall portion causes the crucible to rotate, and the cutting edge is relatively moved in the circumferential direction of the crucible, or the cutting edge is moved in the circumferential direction of the crucible by the moving unit of the cutting edge to cut the edge portion of the crucible .

[3] A method for cutting a glass crucible, characterized in that a groove extending to the entire circumference of the crucible is formed on any one of the outer surface or the inner surface of the crucible, and the surface from the opposite side of the groove is provided [1] or the method of [2] above, the edge portion of the crucible is cut.

[4] A method for cutting a glass crucible, characterized in that a groove extending to the entire circumference of the crucible is formed on any one of the outer surface or the inner surface of the crucible so that the cutting edge is provided with the surface on the opposite side of the groove Advancing toward the groove to cut the edge portion of the crucible.

[5] A glass crucible cutting device comprising a disc-shaped cutting blade horizontally provided with respect to a crucible, a rotating unit of the cutting edge, and a cutting for moving the cutting edge in a circumferential direction of the crucible a blade moving unit and a rotating unit of the crucible; and the rotating cutting blade is brought into contact with the crucible wall surface without being twisted, and is advanced in the thickness direction to form a slit penetrating the crucible wall portion, thereby maintaining the state in which the cutting edge penetrates the wall portion. The crucible is rotated, and the cutting edge is relatively moved in the circumferential direction of the crucible to cut the edge portion of the crucible.

[6] The glass crucible cutting device according to the above [5], comprising: a support table on which the crucible is disposed upward, and a holding unit that is freely raised and lowered above the crucible; and the edge portion to be cut by the holding unit Lift and hold.

[7] The glass crucible cutting device according to the above [5], comprising: a support table provided with a crucible facing downward, a holding unit for freely lifting and setting above the crucible, and an arm extending upward from the support table; The holding unit is held downward, and the edge portion is cut while the edge portion is held by the arm. After the cutting, the crucible is carried out in a state of being held downward, and then the cut edge portion is carried out.

The cutting method of the present invention forms a slit through the wall portion of the crucible by the cutting edge, maintains the cutting blade penetrating the wall portion, and moves the cutting edge relative to each other in the circumferential direction of the crucible to extend the slit to the entire circumference. Therefore, the cut portion extends in the circumferential direction of the crucible in a state where the entire thickness of the wall portion has been cut, and therefore, the weight of the cut edge portion is not concentrated on the inner surface just before the cutting, but can be surely Prevent burrs and defects in the cutting edge.

Specifically, in the cutting method of the present invention, for example, the rotating cutting blade is brought into contact with the crucible wall surface without being twisted, and is advanced in the thickness direction to form a slit penetrating the wall portion of the crucible, thereby maintaining the cutting edge penetrating the wall portion. a state in which the crucible is rotated and the cutting edge is relatively moved in the circumferential direction of the crucible, or the cutting edge is moved in the circumferential direction of the crucible by the moving unit of the cutting edge, and no special need is required. Since the unit is cut, the cutting can be easily performed.

Further, the cutting method of the present invention includes a method of forming a groove extending to the entire circumference of the crucible on either side of the outer surface or the inner surface of the crucible so that the cutting edge faces the surface on the opposite side from which the groove is provided The groove advances to cut the edge portion of the crucible. According to this cutting method, since the cutting edge advances toward the groove from the surface on the side opposite to the groove, the end portion of the cut becomes the inner side of the groove, so that burrs and defects are not generated on the surface of the crucible.

Forming a groove extending to the entire circumference of the crucible on either side of the outer surface or the inner surface of the crucible, and providing a slit penetrating through the surface provided on the opposite side of the groove, so that the slit is extended to the entire circumference to be cut. According to this method, when the slit is formed and the slit that is inserted is extended to the entire circumference of the crucible, burrs and defects are not generated on the surface of the crucible, and the edge portion can be smoothly cut.

The cutting device of the present invention includes a disk-shaped cutting blade horizontally disposed with respect to the weir, a rotating unit of the cutting edge, a cutting edge moving unit that moves the cutting edge in a circumferential direction of the weir, and a rotating unit of the weir; The rotating cutting blade is brought into contact with the crucible wall surface without being rotated, and the slit is formed in the wall thickness direction to form a slit penetrating the wall portion of the crucible, and the cutting edge is maintained to penetrate the wall portion to rotate the crucible and make the cutting edge The cutting edge and the cymbal are controlled so as to relatively move in the circumferential direction of the cymbal, whereby the burrs and the defects are not generated at the cutting edge portion, and the edge portion can be smoothly cut.

Further, the cutting device has a holding unit that is freely raised and lowered above the crucible, whereby the holding unit can mechanically perform the setting of the crucible and the removal after the cutting. Further, since the edge portion can be held during the cutting, it is possible to prevent the edge portion from colliding with the cut surface at the end of the cutting, and the edge portion of the cut can be mechanically taken out.

Hereinafter, the present invention will be specifically described based on the embodiments.

Fig. 1 to Fig. 3 are explanatory views showing the outline of a method of cutting a glass crucible according to the present invention.

The cutting method of the present invention is as shown in Fig. 1 : the rotating cutting edge 10 is brought into contact with the wall surface of the crucible 20 (the outer surface 21 in the illustrated example) without rotating the crucible 20, and the cutting edge 10 is made to the wall thickness. The direction (toward the inner side of the crucible) is advanced to form a slit 30 that penetrates the wall portion of the crucible. Therefore, as shown in the figure, the cutting edge 10 penetrates the wall portion of the crucible 20 and appears on the inner surface side.

Then, as shown in FIG. 2, the cutting blade 10 is maintained in a state of passing through the wall portion, and the crucible 20 is rotated to relatively move the cutting edge 10 in the circumferential direction of the crucible. The cutting portion (cut) 30 is elongated in the circumferential direction of the crucible in a state where the thickness of the wall portion has been cut as a whole, and if the crucible is rotated once, the cutting portion (cut) 30 is extended to the entire circumference and the edge is The portion 25 performs cutting.

According to the above cutting method, the cut portion extends in the circumferential direction of the crucible in a state where the entire thickness of the wall portion has been cut, so that the weight of the cut edge portion 25 is not concentrated on the inner surface to be cut, so that it is sure Prevents burrs and defects in the cutting edge. Further, in the cutting method of the present invention, the cutting blade 10 may be pressed against the inner surface of the crucible and advanced toward the outer surface to form a slit 30 therethrough.

Another cutting method of the present invention is as shown in FIG. 3, forming a shallow groove 27 extending to the entire circumference of the crucible on either the outer surface or the inner surface of the crucible 20, so that the cutting edge 10 is provided with the groove 27 The surface on the opposite side advances toward the groove 27 to cut the edge portion of the crucible. The depth of the groove 27 is preferably about 1 to 3 mm. Further, the width of the groove 27 may be 0.5 to 2 times the width of the cutting edge 10, preferably 1 to 2 times. In the formation of the groove 27, the cutting edge 10 used in the formation of the slit 30 may also be used, in which case the width of the groove 27 becomes substantially the same as the width of the slit 30. According to this cutting method, the cutting edge 10 is advanced toward the groove 27 from the surface on the side opposite to the groove 27, so that the end portion of the cut becomes the inner side of the groove, so that burrs and defects are not generated on the surface of the crucible. .

Fig. 4 shows an outline of the cutting device of the present invention. The cutting device shown in the figure includes a disk-shaped cutting blade 10 that is horizontally provided with respect to the crucible 20, and a support unit 11 of the cutting blade 10. A cutting edge moving unit (not shown) that moves the cutting blade 10 in the circumferential direction of the crucible 20 is provided in the support unit 11.

Further, the cutting device is further provided with a support table 12 for freely rotating the crucible 20, and the support table 12 is connected to a rotation unit (not shown) via a rotating shaft 16. The support unit 11 is provided on the side of the support table 12. In the example shown in FIG. 4, the support table 12 is provided with a cymbal 20 having an opening portion facing upward.

Above the crucible 20, a holding unit 13 for freely moving up and down is provided. The holding unit 13 is provided with a pair of arms 14 extending downward, and the arms 14 are formed to be openable and closable to the left and right of the drawing. A cushioning material 15 is disposed at a lower end of the arm 14.

The setting and removal of the crucible are mechanically performed by the holding unit 13. After the arm 14 of the holding unit 13 is moved above the cymbal 20 disposed upward, it is lowered to the inside of the cymbal opening, the arms 14 on both sides are opened, and the cushioning material 15 is pressed against the inner surface of the cymbal to hold the cymbal 20. In this state, it moves to the upper side of the support table 12, and the arm 14 is lowered to set the crucible 20 on the support table 12.

In the cutting device of Fig. 4, after the edge portion of the cymbal 20 disposed upward is cut, the holding unit 13 is raised in a state in which the edge portion 25 is held, and then moved to the side to carry the edge portion 25 to the outside. Thereafter, the holding unit 13 returns to the upper side of the crucible 20, and the arm 14 is opened to the left and right after being lowered to the inside of the crucible 20, and the cushioning material 15 is pressed against the inner side of the crucible 20 to hold the crucible 20. In this state, the holding unit 13 is raised, and then moved to the side to carry the crucible 20 to the outside.

On the other hand, an example of a device in which the crucible 20 is disposed downward and the edge portion is cut is shown in FIG. In the cutting device of Fig. 5, a support table 12 for freely rotating the set of cymbals 20 is provided. The support base 12 is connected to a rotation unit (not shown) via a rotating shaft 16 . A pair of arms 17 extending to the inner side of the crucible 20 are disposed on the upper surface of the support table 12, and a cushioning material 18 is disposed on the upper end of the arm 17. The arm 17 is formed to be openable and closable to the left and right of the drawing, and is inserted into the inner side of the edge portion of the crucible 20, and then opened to the right and left, and the cushioning material 18 is pressed against the edge portion 25 to support the edge portion 25 from the inner side of the edge portion 25.

Above the crucible 20, a holding unit 13 for freely moving up and down is provided. The holding unit 13 is provided with a pair of arms 14 extending downward from the outer side of the crucible 20, and the arms 14 are formed to be openable and closable to the left and right of the drawing. A cushioning material 15 is disposed at a lower end of the arm 14.

A disk-shaped rotary blade 10 is provided on the side of the holding unit 13. The rotary blade 10 is horizontally disposed on the side with respect to the crucible 20, and is rotatably supported by the support unit 11. A unit (not shown) that reciprocates the cutting blade 10 with respect to the crucible 20 is provided on the support unit 11.

In the cutting device of Fig. 5, in the cutting of the edge portion, the crucible 20 is held by the holding unit 13 in a downward state, and the edge portion 25 is held by the arm 17. After the edge portion is cut, the holding unit 13 is raised while maintaining the state of the crucible 20, and then moved to the side to carry the crucible 20 out to the outside. During the removal of the crucible 20, the cut edge portion 25 is held by the arm 17. Then, the holding unit 13 returns to the upper side of the cut edge portion 25, and the arm 14 is lowered to open to the left and right, and the cushioning material 15 is pressed against the inner side of the edge portion 25 to hold the edge portion 25. In this state, the holding unit 13 is raised, and then moved to the side to carry out the cut edge portion 25 to the outside.

In either of the cutting device of FIG. 4 and the cutting device of FIG. 5, first, the slit of the penetrating wall portion is formed without rotating the crucible 20, and then the cutting blade is maintained in a state in which the cutting blade penetrates the wall portion so that the cutting blade is in the meandering manner. The edge portion 25 is cut by relatively moving in the circumferential direction.

Specifically, first, the rotating cutting edge 10 is brought into contact with the wall surface (outer surface) and advanced in the thickness direction to form a slit penetrating the wall portion of the crucible 20. Next, the state in which the cutting blade 10 is inserted through the wall portion is maintained, and the operation of the rotary blade 10 and the support table 12 is controlled such that the crucible 20 rotates and the cutting blade 10 relatively moves in the circumferential direction of the crucible. If one turn is made, the cutting edge 10 will move over the entire circumference while maintaining the penetrating wall portion to cut the edge portion 25.

The cutting device of Fig. 4 is provided with the cymbal facing upwards, so that it is not necessary to provide the holding unit on the lower side, the device configuration is simple, and the cut edge portion suspended on the holding unit can be taken out to the outside while maintaining this state. On the other hand, the cutting device of Fig. 5 is provided with the crucible facing downward, so that when water for lubrication is supplied during the cutting operation, the water does not accumulate inside the crucible, so that the crucible is not contaminated.

The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit and scope of the invention, and such modifications are naturally included in the scope of the invention.

10. . . Cutting edge

11. . . Support unit

12. . . Support table

13. . . Holding unit

14. . . arm

15. . . Cushioning material

16. . . Rotary axis

17. . . arm

18. . . Cushioning material

20. . . crucible

twenty one. . . The outer surface

twenty two. . . The inner surface

twenty three. . . glitch

twenty four. . . Defective part

25. . . Edge

27. . . Trench

28. . . Cutting trench

30. . . incision

Figure 1 is an explanatory view showing a cutting method of the present invention;

Figure 2 is an explanatory view showing a cutting method of the present invention;

Figure 3 is an explanatory view showing a cutting method of the present invention;

Figure 4 is a schematic view showing a configuration example of a cutting device of the present invention;

Figure 5 is a schematic view showing another configuration example of the cutting device of the present invention;

Figure 6 is an explanatory view showing a prior cutting method; and

Fig. 7 is an explanatory view showing a prior cutting method.

10. . . Cutting edge

20. . . crucible

twenty two. . . The inner surface

25. . . Edge

30. . . incision

Claims (8)

A method for cutting a glass crucible, wherein a slit passing through a wall portion of the crucible is formed by a cutting edge, and the cutting blade is maintained in a state of penetrating the wall portion, so that the cutting edge relatively moves in a circumferential direction of the crucible The above-mentioned through slit is extended to the entire circumference of the crucible, thereby cutting the edge portion of the crucible. The method of cutting a glass crucible according to claim 1, wherein the rotating cutting blade is brought into contact with the crucible wall surface without being rotated, and the slit is formed in the wall thickness direction to form the through slit, and the cutting edge is maintained to penetrate the wall portion. The above-mentioned crucible is rotated, and the cutting edge is relatively moved in the circumferential direction of the crucible to cut the edge portion of the crucible. The method of cutting a glass crucible according to claim 1, wherein the cutting edge is rotated without causing the crucible to contact the crucible wall surface and is advanced in a thickness direction to form the slit, and the cutting blade is maintained in a state of penetrating the wall portion. The cutting edge is moved by the moving unit of the cutting edge in the circumferential direction of the crucible to cut the edge portion of the crucible. The method for cutting a glass crucible according to claim 1, wherein a groove extending over the entire circumference of the crucible is formed on any one of the outer surface or the inner surface of the crucible, and the cutting edge faces the surface on the opposite side from which the groove is provided The groove advances to cut the edge portion of the crucible. A method for cutting a glass crucible, characterized in that after forming a groove extending over the entire circumference of the outer surface or the inner surface of the crucible, the cutting edge is formed from the surface on the opposite side of the groove The groove corresponds to the position, and the cutting is advanced toward the groove The edge of the skull. A glass crucible cutting device, comprising: a disc-shaped cutting edge horizontally disposed with respect to a crucible, a rotating unit of the cutting edge, a cutting edge moving unit for moving the cutting edge in a circumferential direction of the crucible, And the rotation unit of the crucible; and without rotating the crucible, the rotating cutting edge contacts the crucible wall surface and advances in the thickness direction to form a slit penetrating the wall portion of the crucible, thereby maintaining the state in which the cutting edge penetrates the wall portion, thereby causing the crucible to pass through the wall portion. The edge of the crucible is cut by rotating and moving the cutting edge relative to each other in the circumferential direction of the crucible. A cutting device for a glass crucible according to claim 6, comprising: a support table provided with the upper side facing upward; and a holding unit for freely lifting and lowering set above the crucible; and the cut edge portion is formed by the holding unit Lift and hold. A cutting device for a glass crucible according to claim 6, comprising: a support table provided with the above-mentioned crucible facing downward, a holding unit for freely lifting and setting above the crucible, and an arm extending upward from the support table; and by the above holding The unit keeps the cymbal facing downward, and cuts the edge portion while holding the edge portion by the arm, and carries out the edge of the cut portion after the edge portion has been cut and held downward, and then carries out the cut edge. unit.