SU683121A1 - Device for clamping components - Google Patents

Abstract

A DEVICE FOR CLAMPING PARTS, mainly in a machine for friction welding, comprising a housing in whose guides are fitted clamping jaws connected by double-arm levers hinged to the housing, with an axial displacement actuator stem, characterized in that in order to increase the clamping force, the device is equipped with earrings connecting each of the clamping jaws to one of the shoulders of the double-arm levers, the second arm hingedly connected to the axle drive shaft, while the shoulders of one double The levers are located at an obtuse angle to each other, and the arms of the other lever are sharp. § (L

Description

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5 1. The invention relates to a welding technique, namely, devices for clamping parts in friction welding machines. It is well known that a friction clamping device for friction welding, an enclosed body, clamping jaws and a control ram cylinder, with which the round billets of solid and tubular cross-section are fixed. A certain range of diameters ClJK to the device’s drawbacks should be attributed to a relatively low clamping force of the workpieces, which leads to. their slipping into the clamp to the sponge during welding, which lowers the productivity and the need to use axial stops; the lack of self-centering of the clamping jaws, which significantly reduces the accuracy of the manufacture of welded parts, a small range of diameters of the fixed blanks. A device is known for clamping parts, comprising a housing, in which guides are fitted with clamping jaws connected by means of double levers hinged on the housing, with a stem driving axial movement L2. In such a clamping device, the two shoulders are equally identical and their relative position is the same, as a result of which the clamping force is determined only by the geometric dimensions of the arms of the arms. This reduces clamping. The aim of the invention is to increase the clamping force. This goal is achieved by the fact that the proposed device is provided with earrings connecting each of the clamping jaws to one of the two shoulder arms, the second shoulder pivotally connected to the axial movement drive shaft. In this case, the shoulders of one two shoulders levers are located at an obtuse angle to each other, and the shoulders of the other levers are sharp. On zrtezhe showed the proposed device. In the housing 1 of the device are placed two shoulders levers. 2 and 3, as well as the shackles 4, tying one shoulders of the levers 2, 3 to the clamping jaws 5. The other arms of the levers 2, 3 are connected by a pull 6 to an axle displacement drive shaft 7. 12 The magnitude of the force to clamp the parts in the clamping jaws of the device Pj can be found from the relation Рц a cos / 3 2 V, sin (o, + B) where a, b, are the lengths of the arms of the lever 2 and the serge 4, respectively; oi is the angle between the axis of the arm and lever 2 and the center of the fixed part 8; B - arc sin (sino); P is the force developed by the actuator 7. From the above expression it can be seen that the magnitude of the RE is inversely proportional to the angle ct, i. depends on the position of the arms of the levers 2 and 3 relative to the center of the fixed part 8. With large values of fragile d and, a small amount Pj, such a movement of the clamping jaws is necessary, which is necessary for the unhindered release of the part from the device. At small values of the angle oi, an asymptotic age is achieved, the force of clamping P, which reliably keeps the part from slipping in the clamps during welding. The device works as follows. Under the influence of a drive rod of 7 tons ha 6, moving (to the left in the drawing), rotates the levers 2, 3 and the linkings 4 connected with it, which bring the clamping jaws 5 closer together. In the working position, with the junction 5 of the jaws 5 the angle d is minimal and is determined by the specified value of the clamping force P. .. The release of part B from the clamping jaws 5, carried out after the completion of the welding cycle, is performed by reverse movement of the drive rod 7 (to the right in the drawing). In the opened state of the clamping jaws 5, the levers 2 and 3 assume such a position that the angle becomes maximum, and the welded part 8 is freely removed from the device. Thus, the proposed device for fixing parts in a friction welding machine provides high accuracy and the necessary clamping of the part with small dimensions of the drive 7. An important advantage of the device is its small size and intensity, as well as an advantageous 6831214

Improved design that expands the diameter range of the pinch welding machine. With small dimensions and small parts, the device develops sufficient tolerance from the use of axial stops. Higher efforts to clamp the parts, the latter facilitates automation, for example, ten times and more pre-5 RU and unloading of parts, as well as

the outgoing acting welding (axle-provides the ability to weld the ninth) force of the machine, which is significant, the felts are of unlimited length.

Claims (1)

. DEVICE FOR DETAILING COMPONENTS OF PARTS, mainly in a machine for friction welding, comprising a housing in the guides of which clamping jaws are mounted, connected by means of two-arm levers pivotally mounted on the housing, with an axial displacement drive rod, characterized in that, in order to increase the clamping force, the device is equipped with earrings connecting each of the clamping jaws with one of the shoulders of two shoulders of the levers, the second shoulder pivotally connected to the rod of the drive axial movement, while the shoulders of one two shoulders of the lever located They are married at an obtuse angle to each other, and the shoulders of the other lever are sharp. 683121 1