CN201102079Y - Three-jaw self-centering chuck - Google Patents

Abstract

The utility model discloses a three-jaw self-centering chuck for processing large quantities of special-shaped workpieces in the field of mechanical processing technology, which solves the shortcomings of long auxiliary time, low processing efficiency, high labor intensity and unsuitability for batch processing in the prior art when processing special-shaped workpieces. The device includes three linked clamping jaws, on which a special-shaped workpiece clamping fixture is fixedly arranged. The special-shaped workpiece clamping fixture is divided into three parts, which are respectively fixed on three clamping jaws. When the three parts are closed, the clamping hole of the special-shaped workpiece clamping fixture is matched with the clamping surface of the processed special-shaped workpiece. When the clamping fixture is used for processing, it can automatically locate and align according to the shape of the special-shaped workpiece, greatly shortening the auxiliary time during processing, reducing the cumulative error during clamping, and improving the processing accuracy. In addition, according to the different shapes of the special-shaped workpieces, different specifications of the clamping core can be used, which can be widely used for processing large quantities of special-shaped workpieces.

Description

Three-jaw self-centering chuck

technical field

The utility model relates to the technical field of mechanical processing, in particular to a three-jaw self-centering chuck with a clamping device for processing special-shaped workpieces.

Background technique

There are usually three processing methods for special-shaped workpieces. One is to use a four-jaw chuck to clamp the workpiece on an ordinary lathe, and then use a dial gauge to align the workpiece in a single piece, and then process it. Another method is to directly use the three-jaw self-centering chuck on the lathe to clamp the special-shaped workpiece, and use the method of padding the jaws to align and then process. Another is to use a faceplate for processing, and for workpieces with more complex shapes, a faceplate is often used for clamping and processing.

Using a four-jaw chuck to clamp and process special-shaped workpieces, each jaw on the four-jaw chuck must be adjusted according to the shape of the workpiece during clamping, the workpiece is fixed on the chuck, and the dial indicator is used for alignment. According to the measurement situation of the sub-meter, adjust the claws, and finally clamp firmly, so as to achieve the purpose of alignment. However, in the process of processing, when one process of one workpiece is processed, the same process of processing the next workpiece needs to be re-clamped, and the dial indicator is used for alignment, resulting in low processing efficiency. Directly use the three-jaw self-centering chuck to clamp the special-shaped workpiece. After fixing the workpiece on the chuck, use the dial indicator to find the alignment. Because the jaws run synchronously, it can only be positioned at the jaw position according to the measurement of the dial indicator. The method of shim is used for alignment. This will cause the processing accuracy of the workpiece is not high, and this method can only process simple special-shaped workpieces. Use the faceplate for processing. Generally, the more complicated workpieces will be clamped by the faceplate. The clamping and alignment method of the workpiece is basically the same as that of the four-jaw chuck. However, because the workpiece is more complicated, the time for clamping and alignment will be longer. . Make the efficiency that adopts faceplate processing to be very low equally.

The above methods have long auxiliary time, low processing efficiency and high labor intensity when processing special-shaped workpieces, and are not suitable for batch processing.

Utility model content

The technical problem to be solved by the utility model is to provide a three-jaw self-centering chuck for processing large batches of special-shaped workpieces.

The technical solution adopted by the utility model to solve the technical problem is: a three-jaw self-centering chuck, including three linked jaws, and a special-shaped workpiece clamping fixture is fixedly arranged on the jaws, and the special-shaped workpiece clamping fixture is divided into Three parts, the three parts are respectively fixed on the three jaws, when the three parts are closed, the clamping hole of the special-shaped workpiece clamping fixture is adapted to the clamping surface of the processed special-shaped workpiece.

The clamping fixture for the special-shaped workpiece includes a clamping jacket and a clamping core. The clamping jacket is installed on the jaws, and the clamping core is installed on the clamping jacket and is provided with a clamping hole.

The clamp jacket is in the shape of a ring, and is provided with a clamp core mounting surface.

The clamp core is ring-shaped, and the ring core is a clamping hole.

The clamp outer and claw are connected by connecting bolts, and the clamp core and the clamp outer are connected by connecting bolts.

The beneficial effect of the utility model is that the device does not need to be clamped and aligned during processing, and can be automatically positioned and aligned according to the shape of the special-shaped workpiece, which greatly shortens the auxiliary time during processing and reduces the cumulative error during clamping. The processing accuracy is improved, and it can be widely used in the processing of large quantities of special-shaped workpieces, and according to different shapes of special-shaped workpieces, different specifications of jig cores can be used.

Description of drawings

The utility model includes the following 6 drawings:

Fig. 1 is a front view of the utility model;

Fig. 2 is a left view of the utility model;

Fig. 3 is the front view of the clamp jacket of the present utility model;

Fig. 4 is the left side view of the clamp jacket of the present utility model;

Fig. 5 is the front view of the clamp core of the present utility model;

Fig. 6 is a left side view of the clamp core of the present invention.

Parts, parts and numbers in the figure are as follows: special-shaped workpiece clamping fixture 1, claw 2, fixture jacket 3, fixture core 4, clamping hole 5, fixture core mounting surface 6 and ring surface 7.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Figure 1 and Figure 2, the three-jaw self-centering chuck includes three linked jaws 2, and a special-shaped workpiece clamping fixture 1 is fixedly arranged on the jaws 2, and the special-shaped workpiece clamping fixture 1 is divided into three parts. These three parts are respectively fixed on the three jaws 2. When the three parts are closed, the clamping hole 5 of the special-shaped workpiece clamping fixture 1 is adapted to the clamping surface of the processed special-shaped workpiece. The three parts of the special-shaped workpiece clamping fixture 1 are respectively connected with the three jaws 2 on the three-jaw self-centering chuck to form a whole. When the jaws 2 move, they can move synchronously with the jaws 2 to achieve automatic centering. Effect. When processing workpieces, install the special-shaped workpiece clamping fixture 1 on the jaws 2 of the three-jaw self-centering chuck, then clamp the workpiece into the clamping hole 5, and then use the chuck to clamp the workpiece to automatically position it Alignment, then use the clamp core 4 to clamp the workpiece for processing. The device does not need to be clamped and aligned when processing, and it can be automatically positioned and aligned according to the shape of the special-shaped workpiece, which greatly shortens the auxiliary time during processing, reduces the cumulative error during clamping, and improves the machining accuracy. It can be widely used. It is suitable for the processing of large quantities of special-shaped workpieces.

The special-shaped workpiece clamping fixture 1 includes a clamping outer shell 3 and a clamping core 4 , the clamping shell 3 is installed on the claw 2 , the clamping core 4 is installed on the clamping shell 3 , and is provided with a clamping hole 5 . The clamping core 4 can be designed with clamping holes 5 of different shapes according to different workpieces, and the clamping core 4 can be disassembled, and different clamping cores 4 can be replaced according to different workpieces.

As shown in FIG. 3 , FIG. 4 , FIG. 5 and FIG. 6 , the clamp outer shell 3 is in the shape of a ring, and is provided with a clamp core mounting surface 6 . The clamp core 4 is annular, and the ring core is the clamping hole 5 . The fixture jacket 3 is installed on the claw 2 through the ring-shaped ring surface 7, and the fixture core mounting surface 6 is used for the installation and positioning of the fixture core 4, and the ring shape is easy to process, and can better control the clamping fixture of the special-shaped workpiece 1 machining accuracy. Corresponding bolt holes are provided on the ring surface 7 of the clamp outer 3 and the jaw 2, the clamp outer 3 and the jaw 2 are connected by bolts through the bolt holes, and the mounting surface 6 of the clamp outer 3 and the clamp core 4 are provided with corresponding bolt holes. bolt holes, the clamp core 4 and the clamp jacket 3 are connected by bolts through the bolt holes. Through this bolt connection, the clamp core 4 that is severely worn and cannot meet the requirements can be removed, and the replacement is very convenient, and different clamp cores 4 can also be replaced according to different workpieces.

Example

Taking the processing of an elliptical workpiece as an example, in combination with accompanying drawings 1 and 2, during processing, install the jig jacket 3 on the jaws 2 of the three-jaw chuck, select a suitable jig core 4 and install it on the jig jacket 3, Then put the elliptical workpiece into the clamping hole 5 of the clamp core 4, turn the clamping mechanism of the chuck to firmly clamp the elliptical workpiece and achieve automatic positioning, and then process.

Claims (6)

1. three-jaw self-centering chuck, the claw (2) that comprises three interlocks, it is characterized in that: on claw (2), be set with special-shaped workpiece clamping anchor clamps (1), special-shaped workpiece clamping anchor clamps (1) are divided into three parts, this three part is separately fixed on three claws (2), when this three part is closed, the clamping hole (5) of special-shaped workpiece clamping anchor clamps (1) with the clamping face of processing profiled workpiece suitable.

2. three-jaw self-centering chuck as claimed in claim 1, it is characterized in that: described special-shaped workpiece clamping anchor clamps (1) comprise anchor clamps overcoat (3) and anchor clamps core (4), anchor clamps overcoat (3) is installed on the claw (2), anchor clamps core (4) is installed on the anchor clamps overcoat (3), and is provided with clamping hole (5).

3. three-jaw self-centering chuck as claimed in claim 1 or 2 is characterized in that: described anchor clamps overcoat (3) is a circular ring type, and is provided with anchor clamps core installed surface (6).

4. three-jaw self-centering chuck as claimed in claim 1 or 2 is characterized in that: described anchor clamps core (4) is a circular ring type, and the ring heart is clamping hole (5).

5. three-jaw self-centering chuck as claimed in claim 2 is characterized in that: described anchor clamps overcoat (3) connects by connecting bolt with claw (2).

6. three-jaw self-centering chuck as claimed in claim 2 is characterized in that: anchor clamps core (4) connects by connecting bolt with anchor clamps overcoat (3).

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