CN205851906U - A kind of cambered surface claw - Google Patents

Abstract

The utility model discloses, when thin-walled revolution workpiece workpiece is carried out turning operation, a kind of cambered surface jaw fixtures of use.It is characterized in that: be welded with grip block by claw pedestal.Wherein claw pedestal is coordinated with slide block by screw, is fastened on chuck use；By in grip block, the cambered surface of larger radius portion is in close contact with workpiece outer wall, is clamped fixing.This utility model is a kind of cambered surface jaw fixtures, efficiently solves when to large radius thin-wall workpiece turning, and workpiece thin-walled is yielding, and circularity and axiality do not meet the situation of corresponding requirements.

Description

A curved jaw

technical field

The utility model relates to the related technical field of jaw clamps, in particular to an arc-shaped jaw clamp used for turning large-radius thin-walled workpieces.

Background technique

The thin-walled rotary workpiece with a large radius is easily deformed under the joint action of clamping force and cutting force during turning operation, so that the roundness and coaxiality of the workpiece cannot meet the qualified requirements.

Taking the common brake drum as an example, when turning the brake drum, the outer wall of the brake drum needs to be clamped. If ordinary jaws are used to tighten, it is easy to cause the part where the thin wall contacts the jaws to be squeezed and deformed, and concave inward. , while the rest of the parts are showing outward convex phenomenon. However, if an open-loop sleeve is used, it is placed on the outer wall of the brake drum and turned. Although this can solve the problem of thin-wall deformation, the open-loop sleeve has poor versatility and is easy to wear and tear, which will reduce production efficiency.

Contents of the invention

In order to overcome the disadvantages of the above-mentioned prior art, the utility model provides an arc-shaped jaw clamp. It solves the problem that when turning a thin-walled rotary body, it is easy to cause improper clamping to cause thin-wall deformation, reduce production efficiency, and increase unnecessary production costs.

The technical scheme adopted by the utility model is: adopt a kind of curved claw clamp, which is formed by welding the claw base and the clamping block. The jaw base is fastened on the chuck through screws and sliding blocks; in the clamping block, the arc surface of the larger part of the radius is in close contact with the outer wall of the workpiece for clamping and fixing.

Compared with the prior art, the beneficial effects of the utility model are: 1. The jaw base and the clamping block are connected by welding, which has high reliability and good stability; 2. The jaw base of the utility model and the ordinary card The jaws are consistent with the connection mode of the chuck, which has strong versatility, easy operation and good reliability; 3. The clamping block of the present invention adopts two kinds of arc surfaces in the arc surface part, and the radius of the arc surface part in the middle is Smaller, no contact with the workpiece, reducing the excessive concentration of the clamping force on the middle part, which cannot avoid the problem of excessive deformation of the thin wall; while the surfaces with larger radians on both sides are in contact with the thin wall, so that the clamping force is more evenly distributed , greatly reducing thin-wall deformation. 4. This arc-shaped jaw fixture only needs to set the position once, and the same batch of workpieces does not need to be fixed again. Compared with the use of open-loop sleeves, the time spent on placing the workpieces is greatly shortened and the production efficiency is improved.

Description of drawings

Fig. 1 is the front view of the embodiment structure diagram of arc surface jaw clamp;

Fig. 2 is the left view of the embodiment structure schematic diagram of arc surface jaw fixture;

Fig. 3 is the plan view of the embodiment structure schematic diagram of arc surface claw clamp;

In the figure: 1 jaw base, 2 clamping block, 3 rounded part of jaw base, 4 chamfered part of clamping block, 5 screw hole, 6 front chamfer of jaw base, 7 teeth of jaw base Strip, 8 clamping blocks with large radius arc surface, 9 clamping blocks with small radius arc surface, 10 highest welding point

detailed description

The utility model will be further described below in conjunction with the accompanying drawings, wherein the schematic embodiments and descriptions are only used to explain the utility model, but not as a limitation to the utility model.

As shown in Fig. 1, a kind of curved surface claw fixture, the 1 claw base in its structure and the described 2 clamping blocks are placed together as shown in Fig. 1, and the joints are welded, wherein , 10 The highest welding point, the welding material should not be higher than the highest point of the clamping block.

The said 1 jaw base is fixed on the chuck through commonly used bolts and slide blocks. The base rack with 7 claws is in close contact with the chuck to act as a limiter.

The large-radius arc surface part of the 8 clamping blocks is in contact with the thin-walled workpiece to be processed and clamped, and is supported by the front end boss part of the main base of the 1 card, and the small-radius arc surface part of the 9 clamping blocks , not in contact with the workpiece, this is to prevent the clamping force from being too concentrated in the middle of the arc-shaped jaws, which hinders the uniform distribution of the clamping force.

The chamfering of the front end of the 6-jaw base is to increase the movable stroke of the arc-shaped jaws, and is applicable to a larger radius range of thin-walled parts.

The rounded part of the 3-jaw base is to increase the strength of the transition between the two planes, and the chamfered part of the 4-clamping block is designed to avoid interference with the rounded part of the 3-jaw base. And affect the cooperation of 1 jaw base and 2 clamping blocks.

Taking the common three-jaw hydraulic chuck as an example, using the arc-shaped jaws of the present invention can change the three-point contact to six-face contact without changing its convenience and production efficiency, greatly reducing thin-wall deformation , Improve product pass rate.

The above descriptions are only embodiments of the present utility model, and are not intended to limit the patent scope of the present utility model. Any equivalent structure or equivalent transformation made by the abstract of the present invention, instructions and accompanying drawings, or directly or indirectly used in other Related technical fields are all included in the protection scope of the utility model patent in the same way.

Claims (3)

1. a cambered surface jaw fixtures, it is characterised in that: it is welded with grip block by claw pedestal；Wherein claw pedestal passes through Screw coordinates with slide block, is fastened on chuck use；By in grip block, the part cambered surface that radius is bigger closely connects with workpiece outer wall Touch, be clamped fixing.

A kind of cambered surface jaw fixtures the most according to claim 1, it is characterised in that: the cambered surface part of grip block is divided into three Section, one section of middle cambered surface radius is less, during clamping not with absorption surface；The cambered surface part on both sides, as radius length is , consistent with the radius length of workpiece to be machined contact surface, and more than one section of middle cambered surface, be in close contact with workpiece.

A kind of cambered surface jaw fixtures the most according to claim 1, it is characterised in that: the lobe of the rear end of claw pedestal Point, claw pedestal coordinates with grip block, and grip block is higher than bossing, and after the welding of its contact portion, the material that welding uses is not Grip block highest point can be higher than, do not interfere with the work of arc-shaped claws fixture.