Clamp for milling curved surface groove of special-shaped part

Abstract

The fixture comprises a base, a pressing block, a double-end bolt, a compression nut, a pressing plate and the like, the appearance of the base is an irregular cuboid part, a protruding key connected with a T-shaped groove of a machine tool workbench is arranged on the lower portion of the base, and symmetrical through grooves are formed in the front plane and the rear plane of the base respectively. A clamping boss, a positioning boss and a cylindrical positioning pin which are symmetrical left and right are arranged on the base, the base is fixed on a machine tool workbench, and a left shifting body and a right shifting body of a machined part are fixed on the base. The method that the left shifting body and the right shifting body are clamped on the clamp at the same time is adopted, the machined curved surface groove can meet the requirement for good consistency of shape, position and size precision of the curved surface groove, the use reliability of the curved surface groove is guaranteed, and the machining efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of machining irregular parts, specifically relating to a fixture for milling curved grooves on irregular parts. Background Technology

[0002] The left and right derailleurs are typical irregularly shaped parts. They are used in pairs in the component. The curved grooves on the left and right derailleurs are the key parts of the component's operation. The shape, position, and dimensional accuracy of the curved grooves are required to be high, and the machining quality of the curved grooves directly affects the reliability of the component's operation.

[0003] In the existing technology, the curved grooves on the left and right actuating bodies are machined as single pieces. Although the shape, position and dimensional accuracy of the curved grooves can be controlled within the tolerance range, abnormal phenomena such as inflexible movement, jamming and jumping often occur during the operation of the components. The reason is that the shape, position and dimensional accuracy of the curved grooves on the left and right actuating bodies are inconsistent. Utility Model Content

[0004] The purpose of this utility model is to provide a fixture for milling curved grooves on irregularly shaped parts, which solves the problems of poor consistency in shape and position and dimensional accuracy and low efficiency in the machining of curved grooves on the left and right moving bodies in the prior art.

[0005] The technical solution is as follows:

[0006] This fixture for milling curved grooves on irregularly shaped parts includes: a base, pressure blocks, double-ended bolts, clamping nuts, and pressure plates. The base is made of high-strength alloy steel and is an irregularly shaped cuboid. It has a key on its underside that connects to the T-slot of the machine tool table. Symmetrical through slots are formed on its front and rear surfaces. Symmetrical cuboid clamping bosses and locating bosses are located on its top. The front surface of each clamping boss has inclined threaded holes. Symmetrical cylindrical locating pins are located in the center of each boss, and threaded holes are formed along the symmetrical center lines on the left and right sides. The key under the base is installed in the T-slot of the machine tool table. Multiple pressure plates are installed in the symmetrical through slots on the front and rear surfaces. T-slot bolts are installed in the waist-shaped holes. The lower end of the T-slot bolts is connected to the T-slot of the machine tool table, and the upper end is connected to the nut. Tightening the nut secures the base to the machine tool table. The reference round holes on the left and right moving parts of the workpiece are respectively installed on the cylindrical positioning pins on the base. The curved grooves to be processed on the left and right moving parts face upward. Hex socket head cap screws are installed in the inclined threaded holes of the base. Tightening the hex socket head cap screws secures the left and right moving parts in the horizontal direction. Double-ended bolts are installed in the threaded holes on the base. The upper end of the double-ended bolts is equipped with a pressure block and a clamping nut. Tightening the clamping nut secures the left and right moving parts in the vertical direction through the pressure block.

[0007] Furthermore, the center of the cylindrical locating pin on the base is in the same vertical plane as the front plane of the locating boss.

[0008] Furthermore, the clamping boss, positioning boss, and cylindrical positioning pin on the base are an integrated symmetrical structure.

[0009] This utility model has the following advantages compared with the prior art:

[0010] This invention employs a design structure where the center of the cylindrical locating pin and the front plane of the locating boss are in the same vertical plane. This ensures that the design datum of the part is the same as the locating datum of its fixture, avoiding datum misalignment errors and improving the manufacturing accuracy of the part. The clamping boss, locating boss, and cylindrical locating pin on the base adopt an integrated symmetrical structure design, which effectively improves the rigidity and manufacturing accuracy of the fixture. By using the method of simultaneously clamping the left and right actuating bodies on this fixture, the machined curved grooves can meet the requirements of good consistency in shape, position, and dimensional accuracy. This invention has a compact structure and is simple and convenient to operate. It solves the problems of poor consistency in shape, position, and dimensional accuracy and low efficiency in the single-piece machining of curved grooves in the prior art. Its effect is to ensure the reliability of the left and right actuating bodies and improve the machining efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the fixture for milling curved grooves on irregularly shaped parts in this utility model;

[0012] Figure 2 yes Figure 1 Sectional view along line AA;

[0013] Figure 3 yes Figure 1 The left view. Detailed Implementation

[0014] The following description fully illustrates specific embodiments of the present invention to enable those skilled in the art to practice and reproduce it.

[0015] like Figure 1 The diagram shown is a structural schematic of the fixture for milling curved grooves on irregularly shaped parts in this utility model; as shown... Figure 2 As shown, is Figure 1 Sectional view along line AA; as shown Figure 2 As shown, is Figure 1 The left view.

[0016] The fixture for milling curved grooves on irregularly shaped parts includes: a base 1, a clamping block 2, a double-ended bolt 3, a clamping nut 4, and a pressure plate 5. The base 1 is made of high-strength alloy steel and is an irregularly shaped cuboid. It has a key on its underside that connects to the T-slot of the machine tool table. Symmetrical through slots are formed on its front and rear surfaces. Symmetrical cuboid clamping bosses 9 and positioning bosses 10 are located on its top. The front surface of the clamping bosses 9 has inclined threaded holes. Symmetrical cylindrical positioning pins 11 are located in the center of the top, with the center of each pin collinear with the front surface 12 of the positioning bosses 10. Threaded holes are formed along the symmetrical center lines on the top. The key under the base 1 is installed in the T-slot of the machine tool table. Three pressure plates 5 are installed in the symmetrical through slots on the front and rear surfaces. T-slot bolts 6 are installed in the oblong holes on the pressure plate 5. The lower end of the T-slot bolt 6 is connected to the T-slot of the machine tool table, and the upper end is connected to the nut 7. Tightening the nut 7 secures the base 1 to the machine tool table. The reference circular holes on the left actuating body 13 and the right actuating body 14 of the workpiece are respectively installed on the cylindrical positioning pins 11 on the base 1. The curved surface grooves 15 to be processed on the left actuating body 13 and the right actuating body 14 face upward. Hexagonal head screws 8 are installed in the oblique threaded holes of the base 1. Tightening the hexagonal head screws 8 secures the left actuating body 13 and the right actuating body 14 in the horizontal direction. Double-ended bolts 3 are installed in the threaded holes on the base 1. A pressure block 2 and a clamping nut 4 are installed on the upper end of the double-ended bolt 3. Tightening the clamping nut 4 secures the left actuating body 13 and the right actuating body 14 in the vertical direction through the pressure block 2.

[0017] The base 1, the clamping boss 9, the positioning boss 10 and the cylindrical positioning pin 11 on the base 1 are an integral symmetrical structure.

[0018] The terminology used in this invention is descriptive and exemplary, and not restrictive. Since this invention can be embodied in various forms without departing from the spirit or essence of the technical solution, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A fixture for milling grooves on the curved surface of irregularly shaped parts, characterized in that, include: The system includes a base, pressure blocks, double-ended bolts, clamping nuts, and pressure plates. The base is made of high-strength alloy steel and is an irregularly shaped cuboid. It has a key at the bottom that connects to the T-slot of the machine tool table. Symmetrical through slots are formed on the front and rear surfaces. Symmetrical cuboid clamping and locating bosses are located on the top. The front surface of each clamping boss has inclined threaded holes. Symmetrical cylindrical locating pins are located in the center of each boss, with threaded holes along their symmetrical center lines. The key at the bottom of the base is installed within the T-slot of the machine tool table. Multiple pressure plates are installed in the symmetrical through slots on the front and rear surfaces, and oblong holes on the pressure plates are used for... There are T-slot bolts. The lower end of the T-slot bolt connects to the T-slot of the machine tool table, and the upper end connects to the nut. Tightening the nut secures the base to the machine tool table. The reference round holes on the left and right actuating bodies of the workpiece are respectively installed on the cylindrical positioning pins on the base. The curved grooves to be processed on the left and right actuating bodies face upwards. Hex socket head cap screws are installed in the inclined threaded holes of the base. Tightening the hex socket head cap screws secures the left and right actuating bodies in the horizontal direction. Double-ended bolts are installed in the threaded holes on the base. The upper end of the double-ended bolts is equipped with a pressure block and a clamping nut. Tightening the clamping nut secures the left and right actuating bodies in the vertical direction through the pressure block.

2. The fixture for milling grooves on curved surfaces of irregularly shaped parts according to claim 1, characterized in that, The center of the cylindrical locating pin on the base is in the same vertical plane as the front plane of the locating boss.

3. The fixture for milling grooves on curved surfaces of irregularly shaped parts according to claim 1, characterized in that, The clamping boss, positioning boss, and cylindrical positioning pin on the base are an integrated symmetrical structure.

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