SU1521550A1 - Device for centering and fixing workpieces - Google Patents

Abstract

The invention relates to the processing of materials by cutting, in particular, to devices for mounting parts such as stepped short shafts on multi-spindle turning machines. The invention allows for improved clamping reliability. By means of a faceplate on the spindle 2, inside which the drive 12 is pushed out of the part 14, the self-centering cartridge 3 is fixed with clamping cams 5 and the centering mechanism coaxially mounted in the cartridge 3. The sleeve of the centering mechanism is kinematically connected with the actuator of the drive 12 of the ejection of parts 14. Part 14 it is fixed in the cams 5 of the cartridge 3 and the front surface is machined on it and centrification is performed. Then, the part 14 is rotated by 180 °, the centering tip 13 is positioned and the levers 10 is fixed, while the sleeve 8 is fixed on the surface 15 by the clamping jaws 5. 3 sludge.

Description

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The invention relates to the processing of materials by cutting, in particular, to devices for mounting parts such as short rolled shafts on turning multi-spindle machines.

The aim of the invention is to increase productivity by ensuring the reliability of the clamp.

FIG. 1 shows the device at the loading position of the machine, longitudinal section; in fig. 2 - the same, in the position of re-fitting the part; in fig. 3 - the same, in the position with the established controlled support center.

A device for centering and securing parts comprises a chuck 1 attached to the spindle 2 of the machine. A self-centering cam cartridge 3 is mounted on faceplate 1. A supporting center 4 is located on a longitudinal caliper (not shown). Natron 3 contains obliquely mounted clamping cams 5 connected to the machine clamping mechanism by means of the pull 6. Ground cams 5 contain interchangeable clamping elements 7. In the bore of the cartridge case 1, a centering mechanism is installed coaxially with it, consisting of a sleeve 8, a spherical hub 9 installed in it, and self-aligning leads 10.

The sleeve 8 of the centering mechanism is connected with a pushing drive, which is a pull of 1.2 with a threaded tip, connected to a power. Machine drive body (not shown) - in addition to self-aligning leads 10 of centering gear. The mechanism can be fitted with a spring-loaded center tip 13. An ejection drive provides movement of the part 14 in the cartridge 3.

The device works as follows.

Part 14 using a manipulator (not shown) is fed into the working space of the machine in the loading position (Fig. 1). The manipulator pusher feeds the part 14 into the self-centering cartridge 3. Under the action of the pusher part 14, by interacting with the leads 10 and the centering tip 13 of the centering mechanism, moves the sleeve 8 of the centering mechanism deep into the self-centering cartridge 3 all the way into its body, after which the part is clamped 14 in the cartridge 1.

After clamping the part 14 in the cartridge 3, the spindle 2 is rotated and the outer end of the part 14 is machined, including the center surface after which the spindle 2 is turned off, the cushions 5 of the self-centering cartridge 3 are unclenched and pulled out by means of the drive 12

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nodding the parts 14 out of the cartridge 3 through the centering mechanism of the machining unit. The part 14 is pushed into the manipulator tilter. Then the part is edged through 180 °, after which the latter is fed to the cartridge 3 by means of the manipulator pusher, moving the sleeve 8 of the centering mechanism into the body of the cartridge 3. The center tip 13 of the centering mechanism interacts with the centering surface processed on the part 14, and the drivers 10 interact with the end face of the part 14. After clamping the part 14 in the self-centering cartridge 3, the second end of the part 14 and the second center surface are processed. After machining the face and center surface in the next working position of the machine, the center tip of the supporting center 4 is fed to the workpiece 14 and its centering surface comes into contact with the centering surface on the part 14. The rotation of the spindle 2 is stopped. The cams 5 of the self-centering cartridge 3 are unfolded and, by means of an actuator 12 pushing the parts 14 out of the cartridge 3 through the centering mechanism, the workpiece 14 is pushed out of the cartridge 3 and displaces the center tip of the supporting center 4 to the stop that limits its position (not shown).

The cams 5 of the self-centering chuck 3 are clamped and through the replaceable clamping elements 7 clamp the sleeve 8 on the outer surface 15, after which the workpiece 14 is fixed in the centers. After machining the outer surface of the part 14, the rotation of the spindle 2 is turned off, the cams 5 of the self-centering cartridge 3 are expanded and, with the help of the supporting center 4, the workpiece 14 is moved into the cartridge 3, moving the sleeve 8 of the centering mechanism to the body of the cartridge 3 After clamping the cam part. MI 5 of the cartridge 3 is further processed in the next working positions of the machine.

Claims (1)

Invention Formula A device for centering and securing parts, in a plate which is placed a self-centering chuck with clamping cams and a centering mechanism located inside the latter, made in the form of a center and leashes installed in the center sleeve, characterized in that the centering mechanism sleeve is installed to increase the reliability of the clamp with the possibility of axial displacement, and its outer surface is designed to interact with the clamping jaws. cpua.i 7 /four (rig 2