SU1222422A1 - Device for clamping bar stock - Google Patents

Description

one

The invention relates to a stack structure and can be used on multi-spindle automatic lathes and turret lathes for clamping and unclamping bar material, including uncalibrated material. The purpose of the invention is to increase the reliability of the device for clamping bar material by supplying the device with spring-loaded croutons installed in the windows of the stop sleeve with the possibility of interaction with the spindle and the stop sleeve.

FIG. 1 shows the proposed device, a longitudinal section; in fig. 2 shows section A-A in FIG. one.

The device for clamping bar material consists of a spindle 1 in which a clamp pipe 2 with a clamp collet (not shown) and a stop sleeve 3 mounted on it are placed along which the clutch 4 moves. A clamping sleeve 5 is installed on the clamping pipe 2, in which axles 6 of clamping are mounted on axles 6 and interacting with the clamping coupling 4. On the movable sleeve 5, an elastic element 8 and a sleeve 9 are installed, which are pre-compressed by means of a nut 10. shoulder 11. Between the levers 7 of the clamp and the element 8, an intermediate ring 12 is arranged for holding the levers 7 in the initial position. The coupling of the elastic element 8 and the sleeve 5 movably with the clamp pipe 2 is provided by the ring 13 with the clamp 14 and the nut 15.

one

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The stop sleeve 3 is made with equal-: circumferentially numbered windows 16, in which the crackers 17 are installed, spring-loaded by means of springs 18, and with grooves 19. The crackers 17 are part of the sleeve, having outer and inner conical surfaces. The spindle 1 and the stop sleeve 3 have counter-conical surfaces interacting with the conical surfaces of the biscuits 17. The clamp levers 7 have protrusions 20 installed in the slots 19 of the stop sleeve 3, and the protrusions 21 interacting with the intermediate ring 12. On the coupling 4, the clamps , the resistant sleeve 3 and crackers x 17 are made in contact at the time of unclenching of the surface 22-24, respectively.

ten

15

25

2224222

The proposed device works as follows.

Starting position The bar is released. In this case, the clamping sleeve 4 is in the rightmost position, the clamping collet with the clamping pipe 2 is maximally extended from the spindle 1 and in the extreme rightmost position. When clamping, the sleeve 4 of the clip from the drive mechanism (not shown) moves from right to left. The crackers 17 are moved together with the clutch 4 clips to

contact between the conical surfaces of the crackers with the counter conical surfaces of the spindle 1 and the stop sleeve 3 forms a gap between the surfaces 22 and 24 of the clutch and of the crackers and the latter begin to move together with the stop sleeve 3. In parallel with this, the clutch 4 of the clamp moves the levers 7 clamp, sleeve 5, ring 12, elastic element 8, sleeve 9, ring 13, nut 15, clamp pipe with collet and resistant sleeve 3 due to the fact that the clamp coupling with its conical surface

 tends to turn the clamping levers 7

around the axes 6 and compress the elastic element 8, since the levers are mounted in the movable sleeve 5 and the elastic element 8 is pre-compressed by the nut 10, the movable sleeve 5 moves from right to left, moving the parts listed to the contact of the petals of the clamp collet with the rod material, breaking the this friction force between the pipe 2 clamp and the spindle 1, the collet clamp and

 bar.

20

thirty

h 35

Pre-clamp, i.e. the gripping of the bar material takes place through the pre-compressed elastic element 8, which develops a large force, which explains the reliable gripping of the bar before the application of the force of the main clamp. After the bar material is gripped by the clamp collet, the clamp pipe 2 stops, preventing further movement of the nut 15, the ring 13, the intermediate ring 12 and the elastic element 8. The clamp coupling 4 continues to move, turning the clamp levers 7, which abut against the protrusions 20 into the stop sleeve 3 , locked from the backward movement of the crumbs 17, and finally deforms the elastic element 8, which develops the main clamping force, which is

Ring 13 and rafiKy 15 are transmitted by n. pipe 2 clips and. Tsangu clamp. In this case, the clamping clutch 4 runs under its cylindrical surface under the clamping levers 7, and in this position the device is locked (not shown) by a known locking mechanism. The device is in the position of the Bar clamped.

The mode occurs in the following sequence.

The clamp clutch 4 moves from left to right, releasing the clamp levers 7 which, under the action of the elastic element 8, rotates on the axis 6, while the elastic element 8 closes on the movable sleeve 5 and the clamping force is removed from the clamp pipe with the collet. Moving further, the clutch sleeve 4 selects a gap between the surfaces 22 and 24 of the clamp clutch and the crackers, after which the crumbs 17 move together with the clutch 4. The conical surfaces of the crackers emerge from contact with the conical surfaces of the spindle and the stop sleeve 3 , providing the possibility of its movement. The further movement of the clip coupling selects a gap between the surfaces 22 and 23 of the clip of the clip 4 and the stop sleeve 3 and the latter moves with the clip 4 of the clip.

Since the clamping levers 7 are engaged with the protrusions 20 with the stop sleeve, the levers attempt to open up on the axles 6, but cannot do this, since the protrusions 21 rest against the preload of the elastic element 8. Therefore, the clamp levers 7 move together from the movable sleeve 5 from left to right together with the stop sleeve 3. In this case, a gap is selected between the end surfaces of the collar 11 and the collet 14 of the nut 10 screwed onto the movable sleeve 5 and the ring 13 fixed through the nut 15 on the clamp pipe 2, after which the clamp pipe moves together with m Uftoy 4 clips from left to right, pushing the clamping collet out of, shpindel.

The device is set to the bar unlocked position.

 Aa

Editor I. Derbak

Compiled by G. Barinov Tehred M. Morgental

Order 1647/11

Circulation 1001

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Uzhgorod, st. Project, 4

FIG. 2

Proofreader E., Roshchko

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Claims (1)

DEVICE FOR CLAMPING A BAR MATERIAL, comprising a spindle, a clamp pipe with a clamp collet, a clamp coupling, a thrust and movable sleeve, an elastic and intermediate elements, clamp levers mounted in a movable sleeve with the ability to interact with the clamp sleeve and thrust sleeve characterized in that, in order to increase the reliability of the device, it is equipped with spring loaded crackers made in the internal part of the body of revolution with internal and external conical surfaces installed in retaining sleeve windows for engagement with the mating conical surfaces formed on the spindle and the thrust sleeve I. Il y FIG. 1