CN202278112U - Main shaft clamping mechanism - Google Patents

Abstract

The utility model discloses a main shaft clamping mechanism, which relates to a clamping device, which comprises a plurality of clamping jaws and clamping jaw installation sleeves. The surface is provided with a clamping jaw pressure sleeve, which is sleeved on the clamping jaw installation sleeve and matched with the inclined surface of the jaws. The end of the clamping jaw pressure sleeve away from the jaws is provided with a thrust ball bearing, and the thrust ball bearing is provided with an outer ring. There is a guide post between the jaw and the jaw installation sleeve, and a disc spring is sleeved on the guide post; the end surface of the jaw installation sleeve near the jaw is detachably connected with a workpiece support ring, and the workpiece support ring and the working surface of the jaw There is a gap between them. The utility model can effectively solve the problem of insufficient rigidity during spinning of thin-walled pipe parts, and the assembly, disassembly and maintenance are simple and convenient, and workpieces of various pipe diameters can be processed. In addition, the clamping force is large, which is very practical.

Description

Spindle clamping mechanism

technical field

The utility model relates to a clamping device, in particular to a spindle clamping mechanism.

Background technique

As a low-cost, high-efficiency part forming process, spinning technology has been more and more widely used. When performing spinning, a spindle clamping mechanism is needed to fix the processed parts. The spindle clamping mechanism is one of the key components of the spinning machine, which is directly related to the processing performance of the machine tool. Thin-walled pipe parts are one of the main processing objects of spinning forming. When processing thin-walled pipe parts, the clamping force of the existing spindle clamping mechanism is small, which affects the accuracy of the workpiece. In addition, the existing spindle clamping mechanism only clamps one end of the thin-walled tubular part, resulting in insufficient rigidity during spinning of the thin-walled tubular part.

Contents of the invention

Aiming at the problems existing in the above-mentioned prior art, the utility model provides a spindle clamping mechanism, which can effectively solve the problem of insufficient rigidity during spinning of thin-walled pipe parts, and the installation, disassembly and maintenance are simple and convenient, and can process various pipe diameters. workpiece, and its clamping force is large, which is very practical.

The technical scheme of the utility model is: a main shaft clamping mechanism, including several jaws and jaw installation sleeves, the jaws are arranged at one end of the jaw installation sleeves at intervals along the circumferential direction of the jaw installation sleeves, and the surface of the jaws is provided with a clamp Claw pressure sleeve, the jaw pressure sleeve is sleeved on the jaw installation sleeve and matched with the inclined surface of the jaw. The end of the jaw pressure sleeve far away from the jaw is provided with a thrust ball bearing, and the thrust ball bearing is provided with an outer ring. The jaws and the clamp There is a guide post between the jaw installation sleeves, and a disc spring is sleeved on the guide post; the end surface of the jaw installation sleeve near the jaw is detachably connected with a workpiece support ring, and there is a gap between the workpiece support ring and the working surface of the jaw .

Preferably, a clamp block is detachably connected to the working surface of the jaw.

Preferably, a J-type frameless rubber oil seal is arranged outside the thrust ball bearing.

Preferably, there are 8 jaws.

Preferably, a protrusion is provided on the inclined surface of the jaw, and a groove matching the protrusion is formed on the inclined surface of the pressing sleeve of the jaw.

The beneficial effects of the utility model are: the utility model is connected with a hydraulic cylinder, the hydraulic cylinder drives the outer ring, and the thrust ball bearing pushes the clamping claw pressure sleeve to press the clamping jaw, so that the clamping jaw clamps the workpiece blank, and the clamping force is large. A pressure sensor can be configured on the hydraulic oil circuit to make the clamping safe and reliable. During spinning, the workpiece blank is put into the gap between the clamp block and the workpiece support ring, and is positioned with the end face of the clamp jaw installation sleeve. The workpiece support ring is used to support the inner hole of the thin-walled tubular parts, so that the parts have Sufficient stiffness. By adjusting the structural size of the clamp block and the workpiece support ring, workpieces with various pipe diameters can be processed, which is very convenient. In addition, the utility model is simple and convenient in loading, unloading and maintenance, and is suitable for other machine tools and is very practical.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of the internal structure of the utility model.

Detailed ways

As an embodiment of the present utility model, as shown in Figure 1 and Figure 2, a spindle clamping mechanism includes several jaws 6 and jaw installation sleeves 1, and the jaws 6 are spaced circumferentially along the jaw installation sleeve 1 It is arranged at one end of the jaw installation sleeve 1. In this embodiment, as a preference, there are 8 jaws 6. The surface of the jaw 6 is provided with a jaw pressure sleeve 5, which is sleeved on the jaw installation sleeve 1 and cooperates with the inclined surface of the jaw 6. In this embodiment, as a preference, the inclined surface of the jaw 6 is set Protrusion is arranged, and the groove that cooperates with protrusion is arranged on the inclined surface of clamping jaw pressing sleeve 5 . Jaw 6, jaw pressure sleeve 5 and jaw mounting sleeve 1 are all made of 45 steel.

The end of the jaw pressure sleeve 5 away from the jaw 6 is provided with a thrust ball bearing 2, and the thrust ball bearing 2 is provided with an outer ring 3. In this embodiment, as a preference, there are two thrust ball bearings 2 arranged side by side on the clamp The claw pressing sleeve 5 is away from one end of the jaw 6 . The thrust ball bearing 2 is connected to the jaw pressure sleeve 5 through a round nut and a hexagon socket flat end set screw. The outside of the thrust ball bearing 2 is provided with a J-shaped frameless rubber oil seal 4 . A guide post 7 is set between the jaw 6 and the jaw installation sleeve 1, and a disc spring 8 is sleeved on the guide post 7; in this embodiment, as a preference, the guide post 7 is made of 45 steel, and each clip Two guide posts 7 are arranged on the claw 6 . Jaw 6 resets by disc spring 8 on guide post 7 .

A workpiece supporting ring 10 is detachably connected to the end surface of the clamping jaw installation sleeve 1 close to the clamping jaw 6 , and there is a gap between the workpiece supporting ring 10 and the working surface of the clamping jaw 6 . In this embodiment, preferably, a clamping block 9 is detachably connected to the working surface of the clamping jaw 6 . The clamping block 9 is detachably connected to the working surface of the clamping jaw 6 through a hexagon socket head cap screw. By adjusting the structural dimensions of the clamping block 9 and the workpiece support ring 10, workpieces of various pipe diameters can be processed, which is very convenient.

The working process of the utility model is as follows, the utility model is connected with the hydraulic cylinder, the workpiece blank is packed into the gap between the clamp block 9 and the workpiece support ring 10, and positioned by the end face of the jaw mounting sleeve 1. The hydraulic cylinder drives the outer ring 3, and the outer ring 3 pushes the jaw pressure sleeve 5 through the thrust ball bearing 2, and the jaw pressure sleeve 5 and the jaw 6 convert the axial force into a radial force by cooperating with inclined surfaces, protrusions and grooves. Make the clamping jaw 6 clamp the workpiece blank. After the spinning is completed, the jaws 6 are reset by the disc springs 8 on the guide posts 7 .

Claims (5)

1. A main shaft clamping mechanism, comprising several jaws and jaw installation sleeves, characterized in that: the jaws are arranged at one end of the jaw installation sleeves at intervals along the circumferential direction of the jaw installation sleeves, and the surface of the jaws is provided with a jaw pressure The clamping jaw sleeve is sleeved on the clamping jaw installation sleeve and matched with the inclined surface of the clamping jaw. The end of the clamping jaw clamping sleeve far away from the clamping jaw is provided with a thrust ball bearing. The thrust ball bearing is provided with an outer ring. The clamping jaws are installed A guide post is arranged between the sleeves, and a disc spring is sleeved on the guide post; a workpiece support ring is detachably connected to the end surface of the clamp jaw installation sleeve close to the clamp jaw, and there is a gap between the workpiece support ring and the working surface of the clamp jaw. 2. The spindle clamping mechanism according to claim 1, characterized in that: a clamping block is detachably connected to the working surface of the clamping jaw. 3. The main shaft clamping mechanism according to claim 1 or 2, characterized in that a J-shaped frameless rubber oil seal is arranged outside the thrust ball bearing. 4. The spindle clamping mechanism according to claim 3, characterized in that there are eight clamping jaws. 5 . The spindle clamping mechanism according to claim 4 , wherein a protrusion is provided on the slope of the clamping jaw, and a groove matching the protrusion is formed on the slope of the pressing sleeve of the clamping jaw. 6 .

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