SU1360912A1 - Arrangement for boring and facing - Google Patents

Abstract

The invention relates to a machine tool industry and can be used in finishing boring machines and automatic lines. The aim of the invention is to reduce the size of the device due to the more compact arrangement of the drives for moving the boring and cutting tools. The drive for moving the scoring tool is made in the form of a hydraulic cylinder, in the case 21 of which there is a hollow piston 24 with a hollow bar 20, inside which is mounted a shaft 3 of a drive for moving the boring tool. The latter is made in the form of a hydraulic cylinder with a housing 6 and a piston 7, which is connected by a rod 8, a barrel 9 and bearings 10 to a rod 3. The housing 6 of a hydraulic cylinder driving the movement of the boring bit is rigidly connected to the housing 21 of the hydraulic cylinder driving the cutting cutting tool, and the piston 24 of the latter mounted on the housing 6 with the possibility of axial movement. Due to this arrangement of movement drives, the dimensions of the device are significantly reduced. 4 il. S (L 20 CO o about with 1HE FIG.

Description

The invention relates to a machine tool industry and can be used in finishing boring machines and automatic lines.

The aim of the invention is to reduce the size of the device due to a more compact arrangement of the drives for moving the boring and cutting tools.

Figure 1 shows the proposed device; figure 2 - section aa in figure 1; on fig.Z - section bb in figure 2; figure 4 - section bb In figure 1.

The device comprises a hollow spindle 1 with a boring cutter 2 and a drive for moving it, consisting of a rod 3 with a cam 4, which is connected to the cutter 2 via a pin 5. The movement of the boring bar cutter is made in the form of a hydraulic cylinder with a housing 6 and a piston 7 with a rod 8 , which the

through the cup 9 and the bearings 10 is connected with the rod 3. The cylinder 6 body is fitted with a bolt 11, through an axial hole in the barrel, the rod 8 interacts with an actuator actuator for adjusting the boring tool drive, with which the boring tool is adjusted to the required size and the tool is retracted from the machined surface 12 by a stepper motor 13 through the sleeve 14 and the micrometer screw 15 "-35. The final adjustment is carried out

With the help of a sub-adjustment device that can work both on the elevated spindle 1, it is also provided with a tool holder with cutting cutters 16. The device is equipped with a driving movement of the cutting tools, which is made in the form of two oppositely moving sliders 17c with helical gears 18 that engage with the helical gears 19, cut from two sides on the hollow rod 20, The rail of the ha 20 is installed with the possibility of only axial movement on the rod 3 of the drive for moving the boring cutter coaxially with the shaft 3 and hollow spins divide 1 ,. The movement drive of the scoring tool 16 comprises a hydraulic cylinder, the body 21 of which is made with an annular protrusion 22 and is fixedly mounted on the body 6, also made with an annular protrusion 23, coaxially with it, and the piston 24 is hollow. The piston 24 is mounted on the drive housing 6 of the movement of the boring cutter with the possibility of axial movement, for example, through a signal to a sub-adjustment, is supplied after 40 measuring the bore hole with an automatic measuring device (not shown). When commanding the trimming of the boring cutter 2 to the required size, the stepping motor 13 is turned on, its rotor turns to the required angle, and through the coupling 14 the rotation is transmitted to the micrometer screw 15. Then the working fluid is supplied. in the left cavity of the hydraulic cylinder 6 and the piston 7 with the rod 8 is displaced to the right up to the stop into the micrometer screw 15, moves the rod 3 with the copier 4 and through the pin 5 the tip of the tool 2 is displaced from the center of the spindle. The device is ready for operation.

The device works as follows.

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studs 25, and fixed against rotation by means of crackers 26 and a groove made in the hollow piston 24. Hollow piston 24 is connected through bearings with hollow thrust 20, which has the ability to rotate relative to the hollow piston 24 around their common axis. The stroke of the piston 24 is controlled by threaded rods 27. On the power table 28, spindle headstock 29 is installed with a hollow spindle 1 connected via a belt drive 30 with a main motion drive 31. In the cavity of the spindle 1, the floor of the driving tool 20 is set coaxially 16, comprising a drive shaft 3 for driving a boring bit.

In the initial position, the device together with the power table 28 is retracted from the workpiece 32. The piston 24 with the hollow pull 20 is shifted to the right. The slide blocks 17 with the cutting cutters 16 are located at a maximum distance from the center of the spindle. The piston 7 is driven by a rod 8 of a drive for moving a boring chisel, the rod 3 with a screw 4 is shifted to the left. Boring cutter 2 is offset to the center of the spindle.

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Pre-adjustment of the tool when changing it is carried out using a special tool.

A subsetting signal is applied after 40 measuring the bore hole with an automatic test device (not shown). When commanding the additional setting of the boring cutter 2 to the required size, the stepping motor 13 is turned on, its rotor turns to the required angle, and through the coupling 14 the rotation is transmitted to the micrometer screw 15. Then the working fluid is fed into the left cavity of the hydraulic cylinder 6 and the piston 7 with the rod 8 is displaced to the right against the stop into the micrometric screw 15, moves the rod 3 with the cam 4 and through the pin 5 the tip of the cutter 2 is displaced from the center of the spindle. The device is ready for operation.

The device works as follows.

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As a result of the rotation of the spindle 1 and the movement of the device together with the power table 28, the bore of the part 32 is bored by the boring cutter 2. After the end of the bore is completed, the power table 28 stops and the piston 7 with the rod 8 moves to the left together with the rod 3 and the cam 4. the action of the elastic deformations of the tool 2 causes its tip to shift to the center of the spindle. The working fluid is then fed into the right cavity of the housing 21 of the hydraulic cylinder of the actuator displacing the scoring tool 16, and the piston 24 is supplied to the left, which pushes the hollow rod 20 with a double-sided rail 19, which engages with the teeth of the sliders 17, and displaces them to the center of the spindle. At. this is the process of trimming the ends to the desired value. The stroke of the sliders is adjusted by threaded rods 27. After the part has been machined, the rotation of the spindle stops and the power table and device are moved away from the part. Next, fluid is supplied to the left cavity of the hydraulic cylinder 21 and the piston 24, shifting to the right, through the slit 20 displaces the sliders 17 with the cutters 16 to the initial position.

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Claims (1)

Invention Formula A device for boring and trimming the butt with a hollow spindle, carrying boring and scoring cutters, containing the drive for moving the scoring cutter, the pull of which is located inside the hollow spindle with the possibility of axial movement - and connected to the piston of the hydraulic cylinder, of which there is that, in order to reduce the dimensions of the device, the piston of the hydraulic cylinder and the driving gear of the scoring tool are hollow, while the device is equipped with a drive for moving the boring tool, including a hydraulic cylinder, the rod of which is located coaxially The drive motor moves the cutting cutter in its hole with the possibility of axial movement, and the hydraulic cylinder of the drive movement of the boring cutter is located coaxial to the hollow piston of the movement drive of the cutting tool, the hollow piston of the latter is installed with axial movement relative to the hydraulic cylinder of the movement of the boring tool, whose body is rigidly connected to the hydraulic cylinder drive movement of the under-j cutter. AT ± one thirty   - -   -h -y l ha g fg / g / sixteen U5 FIG. g to G7 G8 B b Editor G. Gerber Phage.Z Compiled by L.Makarova Tehred M.Hodanich Order 6181/16 Circulation 970 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Corrector G, Reshetnik