CN105538002A - Special clamp assembly for drilling and grinding slice-type cylindrical part - Google Patents

Abstract

The invention provides a special fixture suitable for drilling and grinding of sheet-type cylindrical parts. The special fixture has the characteristics of high precision, easy installation and simple positioning. It includes a clamping body and a clamping block; the lower end of the clamping body is fixed on the machine tool, and the upper end is provided with a stepped boss; the clamping block is slidably connected with the clamping body through the guide column set on the middle step; the upper end of the clamping block is connected to the top layer The steps are located on the same horizontal plane and form the clamping space of the piece cylindrical parts; the clamping block is penetrated with a clamping screw parallel to the guide column, and the clamping screw is connected to the clamping body; the clamping body and the clamping block Set the clamping arc with an arc less than 180° on the clamping end face. The present invention adopts a double-arc positioning and clamping structure with an arc less than 180°, thereby realizing accurate positioning of workpieces and multi-process processing, and simultaneously eliminating error superposition of multiple clamping and processing of workpieces. Simple installation, high precision, convenient for workpiece clamping and positioning.

Description

Special fixture assembly for drilling and grinding of piece cylindrical parts

technical field

The invention relates to a unit part of a machine tool accessory device, in particular to a special fixture assembly for drilling and grinding a piece-type cylindrical part.

Background technique

As the requirements for mass production of small parts are getting higher and higher, the requirements for processing accuracy and processing efficiency of parts are getting higher and higher, and the requirements for corresponding processing machine tool fixtures are also getting higher and higher, so high-precision and high-efficiency equipment is required. Special fixture. Using high-precision fixtures as precision accessories of precision machine tools requires not only high precision fixtures, but also simple installation and positioning, simple pick and place of workpieces, multi-process processing, easy clamping, high precision and high rigidity.

Contents of the invention

Aiming at the problems existing in the prior art, the present invention provides a special fixture suitable for drilling and grinding of piece-type cylindrical parts. The special fixture has the characteristics of high precision, easy installation and simple positioning.

The present invention is achieved through the following technical solutions:

The special fixture assembly for drilling and grinding of piece-type cylindrical parts, including the clamp body and the clamp block; the lower end of the clamp body is fixed on the machine tool, and the upper end is provided with a stepped boss; the clamp block passes through the guide column and the clamp set on the middle step. The specific sliding connection; the upper end of the clamping block and the top step are located on the same horizontal plane, and form a clamping space for piece-type cylindrical parts; the clamping block is provided with a clamping screw parallel to the guide column, and the clamping screw is connected to the clamp Specifically, the clamping end faces of the clamping body and the clamping block are provided with a clamping arc with an arc less than 180°.

Preferably, the diameter of the clamping arc of the clamp body is slightly larger than the diameter of the cylinder of the piece-type cylindrical part, and the diameter of the clamping arc of the clamping block is larger than the diameter of the cylinder of the piece-type cylindrical part.

Preferably, the diameter of the clamping arc of the clamp body is 0.1 mm larger than the diameter of the cylinder of the chip-type cylindrical part, and the diameter of the clamping arc of the clamping block is 1-2 mm larger than the diameter of the cylinder of the chip-type cylindrical part.

Preferably, a mounting spring is provided between the clamp body and the clamping block, and the mounting spring is correspondingly sleeved on the guide column.

Preferably, the lower end of the clamp body is provided with a tapered cylinder for connecting to the machine tool, and the tapered cylinder is provided with an inner groove and has a two-lobed structure along the generatrix.

Preferably, the top end of the stepped boss of the clip body is fixedly provided with a spring pressing piece, and the free end of the spring pressing piece extends above the clamping space.

Preferably, a transverse groove is provided on the surface of the step below the clamping space and adjacent to the clamping space.

Compared with the prior art, the present invention has the following beneficial technical effects:

The present invention adopts a double-arc positioning and clamping structure with an arc less than 180°, thereby realizing accurate positioning of workpieces and multi-process processing, and simultaneously eliminating error superposition of multiple clamping and processing of workpieces. Simple installation, high precision, convenient for workpiece clamping and positioning.

Further, the cone structure of the clamp body is hollow and two-lobed, so that the clamp can be easily installed and disassembled on the machine tool.

Further, the base of the clamp body is provided with a through hole, which reduces the vibration effect of the clamp body caused by gas when the clamp body is installed on the gas static pressure turntable while reducing the weight of the clamp itself.

Further, the clamping block is tightened with screws and a spring pressing piece is used to prevent the clamping block from warping during the clamping process.

Furthermore, the clamping block adopts an inverted Z shape to cooperate with the stepped structure of the clamping body, which can ensure the stability of the clamping process.

Further, a transverse groove is formed on the upper part of the clamping body, so that the workpiece can be taken out conveniently without damage while realizing the processing of the small hole.

Description of drawings

Fig. 1 is a structural front view of the clamp assembly in the example of the present invention.

Fig. 2 is a structural top view of the clamp assembly in the example of the present invention.

Fig. 3 is a left view of the structure of the clamp assembly in the example of the present invention.

Fig. 4 is a structural diagram of the clamping block in the example of the present invention.

In the figure: 1. Clamp body, 2. Spring pressing piece, 3. Screw, 4. Spring pressing piece, 5. Screw, 6. Guide column, 7. Installation spring, 8. Clamping block, 9. Clamping screw, 10, install the spring, 11, the guide post, 12, the ventilation hole.

detailed description

The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

The special jig assembly for drilling and grinding of piece-type cylindrical parts of the invention can realize easy clamping and high-precision operation of the jig, and is suitable for ultra-precision drilling and grinding of piece-type cylindrical parts.

In the present invention, the workpiece installation positions of the clamping body 1 and the clamping block 8 are designed with an arc less than 180°, and the arc diameter of the clamping block 8 is larger than the arc diameter of the clamping body 1, and the difference is greater than 1 to 2mm. The circular arc plays a role of positioning, and the circular arc of the clamping block 8 plays a role of tightening, and the clamping contact is a line contact, which increases the stability of the workpiece during processing.

Between the clamping body 1 and the clamping block 8 there are guide columns 6, 11, a clamping screw 9 and an installation spring 10 to realize clamping and loosening of the workpiece.

The installation of the fixture body 1 on the machine tool adopts the positioning of the taper hole.

There are spring pressing pieces 2 and 4 on the surfaces of the clamping body 1 and the clamping block 8 to ensure the parallel movement of the sheet-type cylindrical parts in clamping.

Specifically, as shown in FIG. 1 , the clamping body 1 and the clamping block 8 are connected through guide columns 6 , 11 and clamping screws 9 to form a clamp. The clamping block 8 is guided and clamped by the guide columns 6,11. A cone and an inner groove are used at the bottom of the clamp body 1, and a hole is opened at the bottom of the clamp body to reduce the weight of the clamp body, increase the structural strength and rigidity of the clamp body, and have high positioning accuracy and convenient positioning; the bottom of the clamp body 1 The tapered cylinder is a two-lobed hollow structure with a certain ability of elastic change, so it is easier to ensure the cooperation and positioning accuracy of the fixture and the machine tool during the fixture clamping process.

As shown in Figure 2, the clamp body 1 is fixed on the machine tool by screws, and its working part has an arc similar to the roundness of the workpiece, and its diameter is slightly larger than that of the workpiece by 0.1 mm. The clamping block 8, the guide columns 6, 11, the mounting springs 7, 10 and the clamping screws 9 form a clamping structure. The clamping block 8 is guided by the guide columns 6, 11, the workpiece is clamped by the clamping screw 9, and the clamping block is loosened by the reaction force of the installation spring 7, 10 to loosen the clamped workpiece, which facilitates the clamping and picking of the workpiece .

As shown in FIG. 3 , the spring pressing pieces 2 , 4 are fixed on the clip body 1 by screws 3 , 5 . The movable side of the spring pressing pieces 2 and 4 is pressed on the clamping block during the workpiece clamping process, and the spring pressing pieces 2 and 4 can protect the clamping block from warping during the clamping process.

As shown in Figure 4, the clamping block 8 has an arc larger than the roundness of the workpiece at its clamping position, and the diameter of the arc is 1-2 mm larger than the diameter of the workpiece, which makes it easier to clamp the workpiece and ensure the accuracy of the workpiece. The guide hole of the clamping block 8 is a countersunk hole, and the hole can store the installation spring 10 from the inside to the outside.

Claims (7)

1. chip cylindrical parts bores mill Special Fixture for Machining assembly, it is characterized in that, comprises clamp body (1) and clamp (8);

Clamp body (1) lower end is fixed on lathe, and upper end is provided with stepped boss;

Clamp (8) is by being arranged on lead on middle ladder and clamp body (1) is slidably connected; Upper end and the top layer step of clamp (8) are positioned at same level, and form the grasping part of chip cylindrical parts; Clamp (8) runs through the pinching screw (9) being provided with and being parallel to lead, pinching screw (9) is connected on clamp body (1);

The clamping end face of clamp body (1) and clamp (8) arranges the clamping circular arc that radian is less than 180 °.

2. chip cylindrical parts according to claim 1 bores mill Special Fixture for Machining assembly, it is characterized in that, the clamping arc diameter of clamp body (1) is slightly larger than the body diameter of chip cylindrical parts, and the clamping arc diameter of clamp (8) is greater than the body diameter of chip cylindrical parts.

3. chip cylindrical parts according to claim 1 bores mill Special Fixture for Machining assembly, it is characterized in that, the clamping arc diameter of clamp body (1) is greater than the body diameter 0.1mm of chip cylindrical parts, and the clamping arc diameter of clamp (8) is greater than the body diameter 1 ~ 2mm of chip cylindrical parts.

4. chip cylindrical parts according to claim 1 bores mill Special Fixture for Machining assembly, and it is characterized in that, be provided with mounting spring between clamp body (1) and clamp (8), mounting spring correspondence is set on lead.

5. chip cylindrical parts according to claim 1 bores mill Special Fixture for Machining assembly, and it is characterized in that, clamp body (1) lower end is provided with the tapered cylinders for connecting machine tool, and tapered cylinders is provided with inner groovy and is two flap-type structures along bus.

6. chip cylindrical parts according to claim 1 bores mill Special Fixture for Machining assembly, and it is characterized in that, the top of clamp body (1) stepped boss is fixedly installed spring pressuring plate, and the free end of spring pressuring plate extends to above grasping part.

7. chip cylindrical parts according to claim 1 bores mill Special Fixture for Machining assembly, it is characterized in that, to be positioned at below grasping part and the ledge surface of next-door neighbour's grasping part is provided with transverse concave groove.