SU1368138A1 - Clamping device of machine for friction welding - Google Patents

Abstract

The invention relates to friction welding of parts with a round cross-section while fixing them during the welding process for an internal or external side surface. The purpose of the invention is to improve the reliability of the clamping device. When installing the welded blanks on the landing surface of the housing 1 and their landing on the thrust end surfaces of the shafts 2, the parts are preliminarily burned with a nut 5 connected to the drive by installing the shafts at an angle to the longitudinal axis of the housing 1. During the welding process, the shafts 1 simultaneously act axial welding pressure, which causes further shaft movement and clamping of parts, and torque. As a result, the shafts are rotated about their axis, additionally pressing the part to be welded. The mating surface between the contact and seating surfaces of the shafts provides a significant contact area when the shafts rotate. After the end of the cycle and the removal of welding pressure by means of the nut 5, the shafts are moved to the right and due to the shape of the groove in the shafts and the change in the gap between the diameters, they return to their original position. The device eliminates the slippage of the workpiece to be welded during the welding cycle. 4 il. . A-A i SL 00 05 00 00 00 "v &

Description

one

The invention relates to friction welding of parts with a round cross-section while fixing them during the welding process for an internal or external side surface.

The purpose of the invention is to increase the reliability of the clamping device.

Fig, 1 shows the device, front view; FIG. 2 is a section A-A in FIG. 1; on fig.Z - section bb in fig, 2, on fig, 4 - section bb in fig, 2.

The device consists of a housing 1, which is attached to the spindle of the welding machine or the base part of the tailstock (not shown). Drilling holes are installed at an angle in which the shafts 2 are installed with a diameter (g.). To increase the manufacturability, the shafts mate with the holes in the housing through sleeves 3, In principle, it is possible to do without these parts, matching the shafts directly with the mounting holes made in housing 1, the sleeves stopping in their mounting slots pin 4, The grooves of the shafts 2 enter the nut flange 5, which bovoe hole associated with the drive rod prior zazkima workpiece. To avoid skewing the nut during its operation, it has a seating surface mounted vkoly H

target recess of housing 1 (0:, 100 -).

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At the exit of the rear parts of the shafts 2, the nut 5 has the corresponding sampling (2)

From the end, the housing 1 is closed, with a knurled 6 fixed by screws 7, the contact surface of the shafts is made of a part of corrugated diameter (0) (FIG. 4 and radially joined by the surface of the shafts (mm). As in section B-B represents an oval, it is not affixed to FIG. 4,

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Internal ring recess pa-. The call of the shafts 2 is made on the outer diameter of the flange of the nut 5 - section BB (FIG. 3). With the extreme right (extended) position of the shafts 2, the gap between them is close to zero. The axis of the holes in the housing 1 for the installation of the shafts (bushings) is an angle of 12 with its horizontal axis.

The device works as follows.

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At the extreme right position of the shafts 2 (nuts 5), the part to be welded, in particular half of the support roller of the T-130M tractor, is put on the landing surface of the body and on the contact surface of the shafts all the way into their end base surfaces (loading mechanisms, the welding machine itself and its components not shown)

After that, the drive is turned on and the nut 5 moves to the left, while the rear end portion of its flange, obtained as a result of hauling in the body of the nut 5, being in contact with the rear side surface of the groove of the shafts 2, causes them to move synchronously until the gap between their contact surface is removed. and the inner surface of the welded workpiece and its clamp due to the inclined installation of the shafts.

Synchronicity is ensured by the accuracy of making grooves in the shafts 2 and 25 when they are simultaneously jointly machined with the installation in the housing 1 and if there is a reliable coupling between the nut 5 and the housing 1 (stem-sleeve). During this movement of the shafts, a visible gap is formed between the inner annular groove of the grooves of the shafts 2 and the outer diameter of the said flange of the nut 5, which increases with the further movement of the shafts 2 (Fig. 3),

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At the beginning of the welding process, the axial welding pressure is transmitted through the welding joint to the shafts through their face base surface and causes further movement of the shafts 2 and the most ideal clamping of the part. The shafts in this case work as cams with a wedge working surface or as petals of a collet. At the same time, at the beginning of the welding cycle, the shafting factor causes the torque that causes simultaneous rotation of the shafts along its own axis with the axial movement, providing an additional clamping of the workpiece due to the eccentricity of the contact surface 0 relative to the axis of rotation of the shafts 2. how does the contact surface match pa30

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RJ's radius, with the seating surface of the shafts, there is no sharp edge along the line of their intersection, and the shafts contact the surface of the welded part over a considerable area. The presence of an annular gap between the grooves of the shafts

2 and the local flanges of the nut 5 (FIG. 3) do not prevent the rotation of the shafts during the welding process. After the end of the process, the drive is turned on, the nut 5 (Fig. 2) moves to the right, transferring this movement to the shafts through the front end part of its said flange to the front side surface of the groove of the shafts, the latter are displaced along an inclined surface, bringing the contact surfaces out of contact with the base surface of the welded assembly, while the annular gap between the grooves of the shafts and the nut 5 (section BB in Fig. 3) decreases, causing the shafts to turn in the process of their translational movement to the initial position.

Node removed from landing

A special profile shaft at the same time moving along an inclined surface in the mounting holes of the housing (sleeve) and turning in the same mounting holes relative to its own axis.

The advantages also include high manufacturability of the design and a small amount of incoming parts.

The design of the device for clamping parts over the outer side surface (shafts, rods) is similar.

Claims (1)

Invention Formula Clamping device for friction welding machine, comprising a housing with a welding surface for welding hull and surface contact parts and shafts mounted shaft and the cycle repeats. The main advantages of the clamping device in question are the simplicity of the design, ensuring the reliability of its operation and the stable accuracy of the welded assemblies, 1 having large and non-uniform oscillations in the area of the welded section and significant unbalanced relative to the B1 axis of the mass. The main advantage: using for clamping the part at the same time two main factors of the process - axial pressure and torque with the realization of this through one part In the holes of the housing can be rotated and cooperated with a pre-clamping drive, characterized in that, in order to increase reliability, the shafts are mounted with the possibility of axial movement at an angle to the longitudinal axis of the housing, with this the tops of the angles of tilt of the shafts are directed to the seating surface, and the surfaces of the shafts for mounting the product to be welded on them are machined along a radius, the center of which is on the longitudinal axis of the device, and are mated with a seating surface f. phage In b five ui, 3 Yas FIG.