CN104384976A - Clamp device used for machining internal cavity of component with T-shaped head - Google Patents

Abstract

The invention relates to a fixture device specially used for processing the inner cavity of T-shaped head parts. It has a simple structure and is convenient for clamping workpieces. There is space for feeding and moving, and a positioning ring is installed on the side wall, which fits with the end surface of the workpiece to limit the axial freedom of the part. The positioning V-shaped block and sliding positioning pin are installed on the base, which together limit the radial direction of the part. Degree of freedom, the tool setting block is installed on the fixture base through the fixed block, and the fixture adopts the straight groove thread clamping method, which is convenient for workpiece clamping and improves work efficiency. The base of the fixture is equipped with two positioning keys, which cooperate with the groove of the worktable of the milling machine to ensure that the axis of the workpiece is parallel to the axis of the tool.

Description

Fixture device for processing the inner cavity of T-shaped head parts

technical field

The invention relates to a fixture device for processing the inner cavity of a T-shaped head part, in particular to a fixture applied on a horizontal milling machine.

Background technique

The material of the T-shaped head part processed by this fixture device is YL12. The part is installed on one axis. The internal cavity is used to install the shift fork to control the small rotation of the part around the axis. The accuracy of the cavity width is high, and The side wall of the cavity is required to be at right angles to the end face.

In modern machining, for the internal cavity of the rotary part, especially the processing that requires no rounded corners between the side wall of the cavity and other surfaces, a three-sided milling cutter is often used for processing on a horizontal milling machine, and the clamping method generally adopts V Shaped blocks, pressure plates, and bolts are clamped, and the labor intensity of workers is high, making it difficult to improve efficiency.

Contents of the invention

The object of the present invention is to overcome the above-mentioned problems in the prior art, and provide a milling machine fixture with simple structure and convenient operation, which can ensure the dimensional accuracy and position accuracy of cavity processing.

The technical solution of the present invention is that a U-shaped opening is opened on the side wall of the base, which facilitates the feeding and movement of the tool on the horizontal milling machine, and a positioning ring is installed on the side wall, and the same U-shaped opening as the side wall is opened on the positioning ring. The positioning ring is attached to the end surface of the workpiece to limit the axial freedom of the workpiece. A positioning V-shaped block and a sliding positioning pin are installed on the base. The V-shaped block is attached to the outer wall of the workpiece, and the positioning pin shaft is attached to the hole wall of the workpiece end face. Jointly limit the radial degree of freedom of the workpiece, the tool setting block is fixed on the base through the fixed block, and the fixture base is equipped with two positioning keys, which cooperate with the milling table groove to ensure that the axis of the workpiece is parallel to the axis of the tool. The fixture adopts straight groove thread clamping method, which is convenient for workpiece clamping and improves work efficiency.

The invention has a simple structure and can effectively improve the processing efficiency of the inner cavity of the T-shaped head part.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of the T-shaped head part targeted by the fixture. The cavity 1 in the figure is the part processed by this jig.

Fig. 2 is a schematic diagram of the three-dimensional structure of the present invention.

Fig. 3 is a schematic diagram of the straight groove thread clamping method of the present invention.

Detailed ways

The fixture device, as shown in Figure 2, includes a fixture body 1, a side wall 2, a positioning ring 3 is installed on the side wall 2 through bolts, and a positioning V-shaped block 4 is installed on the fixture body to ensure that the middle plane of the V-shaped block is in line with the fixture body. The upper surface is vertical, and the sliding positioning pin 5 is installed on the fixture body 1. By inserting the sliding positioning pin 5 into the end face hole of the workpiece, the workpiece is restricted from rotating around the axis on the V-shaped block, and the tool setting block 6 is fixed to the fixture through the fixed block 7 On the body 1, the compression block 8 is connected to the support 11 through the screw 9 and the straight groove screw 10, and the handle 12 is turned to apply clamping to the parts through the support 11, the straight groove screw 10, the screw 9 and the compression block 8. Force, by adjusting the distance between the screw rod 9 and the clamping screw rod 10, the handle can be clamped within one rotation. Two positioning keys are installed on the bottom of the fixture body, and the positioning keys fit the groove wall of the milling machine table to ensure that the axis of the workpiece is parallel to the axis of the milling cutter, and the fixture is fixed on the workbench by anchor bolts.

When processing workpieces, first match the two positioning keys on the bottom surface of the fixture with the grooves of the milling machine table, then turn the handle 12 to move the straight groove screw 10 outward, manually pull out the sliding positioning pin 5, and put the workpiece into the positioning V-shaped block 4. The opening of the workpiece cavity is in the same direction as the U-shaped opening on the side wall. Push the sliding positioning pin 5 into the end face hole of the workpiece by hand, move the straight groove screw 10, turn the handle 12 to clamp the workpiece, use a feeler gauge to set the tool, and then tighten Bolts secure the fixture to the table for machining.

Claims (2)

1. The fixture device for processing the internal cavity of T-shaped head parts, including the base (1), is characterized in that there is a U-shaped opening on the side wall (2) of the base, which is used for the feeding and feeding of the tool when processing on a horizontal milling machine. Move to leave space, the side wall is equipped with a positioning ring (3), which is attached to the end surface of the workpiece to limit the axial freedom of the part. The base is equipped with a positioning V-shaped (4), which is attached to the surface of the workpiece rotating to limit the radial movement of the part, and at the same time ensure that the center plane of the V-shaped block is parallel to the upper surface of the fixture base. The base is equipped with a sliding positioning pin (5), which is embedded in the end face hole of the part to adjust the opening of the workpiece cavity. At the same time, the rotation of the parts around the axis on the V-shaped block is restricted. The tool setting block (6) is fixedly connected to the base through the fixed block (7). The clamping method adopts straight groove thread clamping, which is convenient for workpiece clamping. 2. The fixture device according to claim 1, characterized in that two positioning keys are installed on the fixture base to cooperate with the milling machine table groove to ensure that the axis of the workpiece is parallel to the axis of the tool.