SU1212746A1 - Device for clamping workpiece in welding - Google Patents

Description

one

The invention relates to mechanical engineering, in particular, to ancillary equipment for assembly and welding works, and can be used, for example, to fasten products to turn-overs.

The purpose of the invention is to improve the reliability of clamping and expanding the technological capabilities of the device by providing centering and 3 modes and products of a flat shape.

FIG. 1 shows a device for. clamping an article having an opening in a working position; 2 t6, in the initial position; FIG. 3 is a top view of FIG. one; in fig. 4 shows section A-A in FIG. 3; in fig. 5 shows an embodiment of a device for clamping a product having a cylindrical surface; in fig. 6 shows an embodiment of a device for clamping a flat product; in fig. 7 is an example of use of the device on a turning device.

On the stand 1 of base 2 on axis 3 a double-arm clamping lever 4 is pivotally mounted, made in the form of a fork, between the cheeks of which is a pin 5 with an eccentric bushing 6 mounted on it, which has an area with teeth 7 and two eccentric sections 8 and 9. Opposite the side of the lever 4 is connected through the axis 10 to the hinged pull P, which through the axis 12 connects

yen with the end of the rocker arm 13, the other end of the rocker arm 13 is connected through the axis 14 to the centering finger 15. The finger 15 is installed in the guide

16 rack 1 and has a lead chamfer

17 and tooth 18. Finger 15 is spring-loaded with respect to guide 16 by spring 19. Aligned with finger 15 into guide 16, centering sleeve 20 is pressed in. Rocker 13 in its middle part is connected via axle 21, breaking levers 22 and 23, by means of hinge 24. With a PPE cylinder 25, Pa, the support base of the guideway 16, product 26 is positioned (for example, in the form of a drawbar). PA of FIG. 1 shows a device for clamping in a position where the tongue has a hinge 27 at its end, the cross section of which is a torus. When fixing a product of another configuration (cylindrical form), an example of a constructive embodiment

to

15

35

Here axis 3 is 20

212746

shown in FIG. 5. Chaga 4 and the finger 15 are located on opposite sides of the product 26, and the sleeve 6 fulfills the role of the finger rest 15. When attaching a flat product such as a plate, an example of the structural embodiment is shown in FIG. 6. In this case, the axis 3 of the lever 4 and the finger 15 are located on the same side relative to the product - the plate. The device can be mounted on the collar 28 (fig. 7) to the posts 29 and 30 of which the base 2 is attached.

The device works in the following way.

Power cylinder 25 is in the initial position, levers 22 and 23 are inclined (pulled out) towards the power cylinder 25. The beam 13 is lowered down, the spring 19 is in a free state, the centering pin 15 is lowered, the eccentric sections 8 and 9 of the sleeve 6 are at

 top left position, the axis 10 of the lever 4 is lowered. When installing the product (d), 26 on the support base, pet-. L 27 (in cross section a torus) enters the lead-in chamfer 17 of the finger 15 and at the price of the 30 taper sleeve 20. The power cylinder 25 is turned on, the hinge 24 moves to the left, straightening the levers 23 and 22. At the same time, the rocker arm 13, turning around the axis 14, lifts upwards. 11. The latter, through the hinge 10, rotates around the axis 3 the lever 4, and the stud 5 with the sleeve 6 goes down all the way into the product 26. As this left end of the rocker arm 13 stops, the force is transmitted through the axis 21 to the right end rocker 13, which, having overcome the resistance of the spring I9, turns in circle axis 12 and raises

45 finger 15 in direction to tsey 16 up. First, by chamfer 17, then by teeth 18, pin 15 engages with the gear section 7 of sleeve 6 and rotates the latter on pin 5. When

50, this ensures rotation of the eccentric sections 8 and 9 to clamp the product 26. In this position, the rocker 13 occupies the horizontal upper position, and the levers 22 and 23 are fixed along the same axis in the vertical position. This is a stable position. Leverage 22 and 23 of this position can only force

the power cylinder 25, directed to the left. Even with a sudden disconnection of the energy carrier, the unclamp will not occur. After fixing the product 26 to the tilter 28, the operator welds it.

The use of the proposed device makes it possible to increase the reliability of the clamp, which is ensured by the fact that:

the rocker in the upper position is securely fixed by levers that are in a locked stable state

SRI (one axis). The wedging of the levers will not occur even in the event of a power failure;

the teeth on the centering pin and the eccentric bushing ensure reliable clamping of the product both at minus and plus tolerances.

The use of the proposed device will also ensure the expansion of the technological capabilities of the device due to the centering and clamping of products of various configurations.

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Editor N. Pushnenkova

Order 701/21 Circulation 1000 Subscription

VNIIPI USSR State Committee

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

Branch PPP Patent, Uzhgorod, st. Project, 4

Compiled by S. Kul Vtsev

Tehred M. Gergel Corrector M. Demchik

Claims (1)

DEVICE FOR CLAMPING THE PRODUCT AT. WELDING containing a power cylinder mounted on the base, a two-shoulder clamping lever, a clamping lever supply mechanism and a clamping force generating mechanism, characterized in that, in order to increase the clamping reliability and expand the technological capabilities of the device by providing centering and clamping of products of various shapes, the device is equipped with fixed on the base of the guide and installed in the guide by a spring-loaded centering finger with teeth, the two-shoulder clamping lever is made in the form of a fork with With a stud attached between its cheeks, the clamping lever supply mechanism is made in the form of two breaking arms connected to the power cylinder and pivotally mounted at the end of one of the rocker arms, one arm of which is pivotally connected to the centering finger, and the other is provided with an articulated link connected to the clamping arm, wherein the mechanism of creating the clamping force is made in the form of an eccentric sleeve with teeth mounted on the pin of the clamping lever mounted with the possibility of interaction of its teeth with the teeth and centering finger.