SU831577A1 - Device for finishing working of holes - Google Patents

Description

(54) DEVICE FOR FINAL PROCESSING

HOLE

allowing the driver to move about the guides 13. The lever 15 secured to the arnir 14 has a probe 16 and the brake shoe 18 is attached to the expanding chassis nut 17, mounted with the possibility of moving along the direction 13.

The device contains a distribution shaft 19, part of which is made. a spindle of 20. A double-sided jg coupling 21 connects the distribution wap 19 to the cam shaft 22. The coupling 23. coupling with a safety spring connects the camshaft 19c to the shaft of the pinion gear 24 coupled to the toothed rack 25 mounted on the cam 12. The device also includes. a microswitch 26 mounted on the path of the brake brake 18, and microswitches 27 and 28 mounted on the path of the stop 4. The contacts of the microswitch 26 are connected to the running nut emitter magnet 17 and one of the electromagnets of the clutch 21. The contacts of the microswitch 27 25 are connected are connected with the reverse unit 29, the second electromagnet of the clutch 21 to the electromagnet by the act of the coupling 23, the contacts of the microswitch 28 are connected with the unit 29 of the reverse 30

Spring 9, piston Yun, the pusher i 1 is implemented in the device as the tool tool assembly ZO, cam 12, rail 25, rack gear 24 and clutch 23 Bypoln5pot funkiii predat - 35chik 3V, thermometer block 18 and microswitch 26 of the function of the control unit behind the sensor 32; a lever 15 with a feeler gauge 16 and a microswitch 28 functions of the unfolding control unit and 40 of the strument 33,

The device works as follows.

When fine-tuning the threaded hole, the mandrel 1 is driven into the rotational 45

the movement and the priter are brought to the workpiece 6 along with the rajaykgai shirt 5. After the thread has been threaded into the thread of the hole to be machined, the unclamping shirt 5 is obtained- 50 9t its movement of the path itself to the thread of the part and carries the mandrel 1 with it. When the rod 3 interacts with the piston 10, the axial movement of the mandrel 1 slows down 55 and the resistance of the rod 9 is retarded. At the same time, the spreading shirt 5 of the lap is located on the conical part 2 of the mandrel 1, which leads to the opening of the lap.

By compressing the spring Nfepe, the unclamping of the priter proceeds until the elastic forces of the expanding jacket of the priter and the forces of the walls of the hole to be machined on the priter compensate for the radial component of the pressure force of the conical part of the mandrel on the expansion jacket associated with the force of the spring 9. In the end of the passage, under the influence of the stop 4, closes the contacts of the microswitch 28, and the reverse unit 29 issues a command to switch the spindle rotation direction. In this case, the razshitna shirt 5 of the priter is unscrewed from the workpiece, and is carried along by the mandrel 1. The idle stroke continues until it is closed by the stop 4 of the contact of the microswitch 27

Thus, the mandrel. takes

at the beginning and at the end of each of the passages

same position determined by rae

- by marking the stop 4 and the contacts of the microswitches 27 and 28,

The maximum pressure of the primer on the surface to be treated is determined by the elasticity of the primer extension shirt 5, its design, rigidity to the length of the spring 9. As a result, the degree of extension of the primer after the first pass is not the same and depends on facts. who rejects the times of the holes in the code fine-tuning. Since the position of the mandrels 1 at the end of the working stroke is unchanged, the degree of uncoupling of the primer is different, which leads to a different axial position of the unscrewing shirt 5 of the lap in the lowermost position.

At the end of the working stroke, the expanding jacket 5 of the lap operates with the probe 16 of the lever 15 and transfers it to a new position depending on the position of the expanding jacket 5 of the lap in the lowest point of the stroke. This leads to the corresponding. The movement of the brake pad 18 along the guides 13. At the end of that turn, when the contacts of the microswitch 27 are closed, the clutch 23 closes, briefly connecting the pinion gear 24 to the camshaft 19, H1x causes the cam 12 to move with the guides 13. After riding 1x Brake pad 18 movement. cam 12 is stopped and the rest of the stroke is extinguished by slipping in the clutch 23

Claims (1)

Thus, the linear movement of the cam 12 is determined by the position of the brake pad 18, i.e. ultimately, the degree of expansion of the lap. If the hole has a small allowance for fine-tuning, unclenching the lapping on the first pass is significant, respectively, the brake pads 18 move at the end of the working stroke and the cam 12 at the end of the idle. This leads to the completion of the machining cycle in fewer passes. When moving the cam 12, it moves from the pusher 11, which creates a pre-compression of the spring 9. On the second pass, the uncoupling of the priter starts from the moment when the spring 9 is compressed to the length it occupied passage. The profile of cam 12 is designed so that the pusher 11 moves with each pass by an amount less than the magnitude of the spindle movement per stroke. Therefore, the force of the rae sim priter is reduced with each successive pass. At the end of the finishing operation, the pusher 11 moves to the horizontal part of the cam 12 and no further extension is done. When the lap is unfolded so that the outer surface of the expanding jacket 5 has the nominal size of the finished hole, the pad 18 closes the contacts of the microswitch 26. This causes the lock nut 17 to close, which, moving along the drive screw 20, returns to the initial position the brake pad 18 and cam 12. 776 Closing the contacts of the microswitch 26 also triggers one of the electromagnets of the two-way clutch 21. In the extreme upper position of the mandrel, when the contacts of the microswitch 27 are triggered, it switches on an electromagnet clutch 21, whereby the cam 22 is rotated which causes churning unclamping hydrochloric lapping shirt 5 from the mandrel. After that, the device is ready. To fine-tune the next part. The invention The device for the final processing of the holes, containing the setting device and the comparison, control, unclamping and control unclamping tools tool, so that, in order to increase productivity by creating optimal conditions for final processing by a constant decrease in the shot prius ska on each subsequent pass, it is. provided with an control unit of the setting device; in this case, the input of the control unit of the unclamping tool is connected with the control unit of the unclamping, and the output is connected with the control unit through the control unit. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 221527, cl. B 24 B 33 / O4, 1966. ten lit Jj /; d.2 32 i /