SU1362602A1 - Arrangement for retaining and clamping parts - Google Patents

Abstract

This invention relates to ancillary equipment for assembly and welding. The aim of the invention is to increase the reliability of the clamp and reduce the energy consumption of the drive by unloading the drive stem from the forces in (L oo O5 to 05 O to

Description

136

clamping position. In the initial position, the part is not clamped, the stem (Ø) 3 of the pneumatic actuator is in the upper position, the levers (P) 8 are under, the action of the spring is folded and in its end support surface contacts the stop bar 5 and the side surface of the flare nut 4. Turning through the handle 14, the rocker 13, the presser P is moved to the working position and clamp the part. At the same time, P 8 fully perceives the pressure response from the clamping force, unloading the W 3 pneumatic actuator. To expand the part, W 3 moves down. When this is attached to the W taper nut 4,

one

The invention relates to mechanical engineering, in particular to auxiliary equipment for assembly and welding. ,

The aim of the invention is to increase clamping reliability and reduce drive power consumption by unloading the actuator stem at the clamp position.

Figures 1 and 2 show the proposed arrangement for fixing and clamping the parts in the clamped state; on fig. 3 - the same, in the decompressed position and the lower position of the rod; in Fig.5 - about the same, with the upper position of the rod in the initial position.

The device for fixing and clamping the cetal comprises a housing 1 (FIG. 2), a pneumatic actuator 2 mounted on it (FIGS. 1-4), containing a rod 3, on which a taper nut 4 is rigidly fixed. On the nut 4 a stop bar 5 is installed, equipped with a stop 6 (Fig.1 and 2). The stop bar 5 is able to move relative to the flare nut 4 and is associated with the latter. through the spring 7 (figure 1). On the casing of the pneumatic actuator 2, there are pivotally installed swinging levers 8 with an end bearing surface 9 and bevels 10, interconnected by a tension spring. On the thrust plate 5 is pivotally mounted pressure plate 11 (figure 2). which, via a link 12, is connected with the spring 7, koszhima, acts on the bevels of the YuR 8, their separation. After opening the P 8, the retaining plate 5 is released and moves after W 3. The P 8 retracts and the spring 7 again brings the bar into contact with the end surface of the nut 4. In the proposed device, the greatest drive W of the drive is needed only for divorce P 8. This force determined by the angle of the cone 4 and the friction on the interacting surfaces. Due to this, it is possible to use a smaller pneumatic drive and thus achieve a reduction in energy consumption. 5 il.

an armature 13 hingedly mounted on the housing 1. The stop 6 serves to limit the rotation of the pressure lever 11 (Fig. 4). The rocker 13 is equipped with a handle 14. On the housing 1, the device is installed part 15 (Fig.2 -5). The device works as follows. I

In the initial position, the part is not clamped (FIG. 3), the rod 3 of the pneumatic actuator is in the upper position, the levers 8 under the action of the spring are reduced and their end bearing, the surface is in contact with the stop bar 5 and with the side surface of the flare nut 4, which limits the closing angle

levers 8 (figure 1). The operator, turning through the handle 14 of the yoke 13, transfers the pressure lever 11 to the working position and produces the clamping of the part 15 (FIG. 2). As leverage

8 are in contact with the stop bar 5, they fully perceive the pressure reactions R from the working force Q that occurs during the clamping (Figures 1 and 2). At the same time rod 3 pneumatic cylinders

completely unloaded, and the entire system is in working condition even in the absence of pressure in the pneumatic actuator, thus ensuring high clamping reliability.

In order to expand the part, air (pressure) is supplied to the rod end, the rod, by moving. down together with the flare nut 4, squeezing the spring 7, through the tapered surface of the nut begins to interact with the bevels 10 of the levers 8, divorce them. The lever 8 is dispersed along a path close to the tangent of the support surface of the bar 5. After the arms 8 are opened, the stop bar 5 is released and begins to move after the rod 3, and the whole clamping device 15 is detached by the fact that.

and the spring 7 again brings the bar 5 into contact with the face of the cone nut 4. With the further movement of the rod down the cone nut 4, the side surface interacts with the bevels and the long edges of the levers 8, keeps them in the open state throughout the entire stroke length (fig.Z), the greatest force of the rod is only necessary for the uncoupling (unclamping) of the levers 8, which depends both on the angle of the cone part of the nut and on the frictional forces on the interacting i. Therefore, it is possible to achieve obtaining a pneumatic actuator with a minimum diametral size, reducing the flow rate of compressed air and obtaining a clamping force, independent of the force on the pneumatic actuator rod, in contrast to

the base case, which is taken as a prototype.

Claims (1)

Invention Formula A device for fixing and clamping parts, comprising a body hinged on the body of a rocker arm with a handle, a pressure lever connected with an arm with a rocker arm, an emphasis for limiting the rotation of the pressure lever and driving the pressure lever, performed as a power cylinder. in order to increase the clamping reliability and reduce the drive energy consumption by unloading the actuator stem from the clamping forces, the device is equipped with a mechanism for unloading the actuator stem, made in the form of two pivotally mounted on the housing and relative to each other spring-loaded arms with an end bearing surface and bevels, thrust plates for the end support surface of the levers and the flared nut attached to the actuator stem with the possibility of interaction with the bevels of the levers, while the the strap for the end support surface of the levers is mounted on the cone nut and is spring-loaded relative to it, and the clamping lever and the stop for limiting the rotation of the clamping lever secured to the specified hard bar, g 15 FIG. 2 Phii ft Editor T. Parfenova Compiled by E. Kryukova Tehred L. Serdyukova Proofreader L. Pilipenko Order 6339/10 Circulation 970 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Uh th