SU1761360A1 - Clamping device with adjustable pitch - Google Patents

Abstract

Usage: the invention relates to mechanical engineering and can be used in straightening machines and spot welding machines for rebar. SUMMARY OF THE INVENTION: The device consists of clamping 1 and expanding 2 parts for wire 6. Clamping part 1 comprises a hollow body mounted for reciprocating movement, a self-wedging cone mechanism with working core 7 housed in the body. The unclamping part 2 consists of a spring loaded the body in the direction of the working stroke of the device and installed with the possibility of interaction with the core 7 of the hollow pusher 11, the travel bar 16 and the lever pusher 15 which is rotatable relative to the axis of the lever 15, hollow pusher surface 11 are grooves 13. In this case, one arm of the lever holds the pusher 15 izog-; naked in the direction of the working stroke of the device, and the other - in the form of a fork and placed in the slots 14 of a hollow pusher 11. 2 Il. sl C

Description

The invention relates to the field of mechanical engineering and can be used in straightening machines and spot welding machines for rebar.

The purpose of the invention is to expand the technological capabilities of the device by providing adjustment of the mechanism to a variable in a large range of sizes the feed step with a constant course of the drive mechanism and increasing the reliability of its operation.

FIG. 1 shows a device in longitudinal section; in fig. 2 is a section A-A in FIG. one "

The clamping device with adjustable pitch includes a body consisting of

from two coaxial parts, clamping 1 and expanding 2, interconnected by a threaded connection and locknut 3. Clamping part 1 of the housing has a tapered boring and is fixed on bracket 4 to crosshead 5, which is reciprocated from the wire feeder 6 "Inside the clamping part 1 there is a hollow core with a shoulder 7, which has openings for the balls 8 and is spring-loaded towards the device idling by a spring 9, the force of which is adjusted by a nut 10. In the expanding part 2 having a cylindrical bore, mounted hollow plunger 11, spring-loaded spring 12 in the direction

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the working stroke of the device, i.e. in the direction opposite to the action of the spring 9 on the core.

On the hollow pusher 11, a transverse boring 13 is made. In the expanding part 2, a double-arm curved lever pusher 15 is pivotally mounted on the bracket 14 and interacts with the track bar 16 mounted on the rod 17 when the specified wire pitch is performed. The bar 16 can be moved on the rods 1 to 7 at the desired intervals according to a certain program by another mechanism, and the movement is carried out from a larger step to a smaller one in the direction of the device’s working stroke. The working surface of the bar 16 is selected on the basis of the maximum wire pitch. 20 The lever pusher 15 is made snug to reduce the shock loads that occur when the pusher hits a track bar 16.

One shoulder 18 of the curved lever-25 pusher 1 5 is made in the form of a fork that enters the transverse bore 13 of the hollow pusher 11 through the groove 19. The second shoulder 20 of the curved lever pusher 15 is provided with a roller 21, designed to reduce the frictional force between the lever pusher - 15 and travel bar 16.

The device works as follows.

During the working stroke of the crosshead 5, the clamping part 1 with a tapered bore interacts with balls 8, which, resting in the nests of the core 7, are preloaded by the spring 9 against the walls of the cone of the clamping part 1, and consequently, to the wire 6, immediately interact with it. Jammed wire 6, the balls lead it in the direction of the stroke 30

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with the plug 18 along the cylindrical surface of the expansion part 2 of the device until it stops at the end of the hollow core 7. Under the influence of the spring 12, the core 7 moves towards the working stroke of the device, and the balls 8 will come out of contact with the cone of the clamping part 1, releasing the wire 6 from the clamping forces. During the return stroke, the device is idling, i.e. Does not grip the wire. With repeated moves, the cycle of operation is repeated.

The location of the lever pusher on the working surface of the travel bar from the beginning of the working stroke of the wire feeder to the completion of the necessary step will allow you to create automatic multipoint welding, bending and other machines and ensure the reliability of the device

Claims (1)

Claiming device with adjustable pitch for feeding the wire into the treatment zone, comprising a hollow body mounted for reciprocating movement, a self-locking tapered self-wedging mechanism with working core- as well as a wedging mechanism incorporating spring-loaded to the housing and mounted to be cooperative core-hollow pusher, travel bar and mounted with the ability to interact with the rod; the pusher, which is due to the fact that, in order to expand technological capabilities and increase reliability, grooves are made on the surface of the hollow pusher, one arm of the pusher lever is bent toward the side problem until the lever pusher of the device and the other body 15 by the roller 21 come out of engagement with the track bar 16. With the roller 21, the pusher 15 rotates around its hinge under the action of the releasing spring 12 pusher 11 and moves it together 50 in the form of a fork, which is placed in the slots of the hollow pusher, while the hollow pusher is spring-loaded in the direction of the working stroke of the device, and the contact roller inserted into the device is additionally installed on the curved arm of the lever pusher, i in the form of a fork, which is placed in the slots of the hollow pusher, while the hollow pusher is spring-loaded in the direction of the working stroke of the device, and the contact roller inserted into the device is additionally installed on the curved arm of the lever pusher, i 17 21 7G 20 A - L