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CN-116038392-B - Numerical control lathe fixture for machining side nozzle parts and clamping method

CN116038392BCN 116038392 BCN116038392 BCN 116038392BCN-116038392-B

Abstract

The invention discloses a numerical control lathe clamp for machining side nozzle parts, which comprises a main body part, a positioning part and a clamping part, wherein the main body part comprises a clamp main body, one end of the clamp main body can be directly connected with a machine tool spindle, the positioning part comprises a rear positioning gasket, a lower positioning gasket, a positioning block and the like and is used for adjusting the clamping position of the parts so as to ensure that the central shaft of a nozzle to be machined of the side nozzle parts is coaxial with the machine tool spindle, and the clamping part utilizes the lever principle to drive a pressing plate to press the side nozzle parts to be machined by adjusting a supporting screw and tightening a compression nut. The invention solves the problem of inconvenient clamping of the side nozzle parts in the aerospace valve automatic machine in the machining process, realizes the rapid clamping of the side nozzle parts, shortens the production period of the parts, ensures the machining precision of the parts and improves the machining efficiency.

Inventors

  • YANG SHENGXU
  • TANG XIONGBIN
  • LI YU
  • HE XIAOHU
  • XU HONGXIANG
  • TONG JIANBO
  • GAO LINGYUN
  • ZHAO JINMIN

Assignees

  • 西安航天发动机有限公司

Dates

Publication Date
20260508
Application Date
20230215

Claims (9)

  1. 1. The numerical control lathe clamp for machining the side nozzle parts is characterized by comprising a clamp main body (1), a positioning part and a clamping part; the clamp comprises a clamp main body (1) and a clamp clamping device, wherein the clamp main body (1) comprises a cylindrical section and a stage, one end of the cylindrical section is connected with a machine tool spindle, the other end of the cylindrical section is connected with a step section, clamping grooves are formed in the side wall surface of the cylindrical section, two sides of the step surface of the stage are planes, and adjusting fastener mounting holes are formed in the planes; The positioning part comprises a positioning block (10), a positioning fastener and an adjusting fastener, wherein one end of the positioning block (10) is connected with a side nozzle part (9) placed on the step surface of the clamp main body (1) through the positioning fastener, the other end of the positioning block is installed in the adjusting fastener installation hole through the adjusting fastener, and the positioning block (10) is adjusted to be in a position with the clamp main body (1) through the adjusting fastener, so that the central shaft of a nozzle to be machined of the side nozzle part (9) is coaxial with a machine tool main shaft; The clamping part comprises a supporting screw (2), a pressing plate fastener and a pressing plate (6), wherein the pressing plate (6) is arranged on the clamp main body (1) through the pressing plate fastener, one end of the pressing plate (6) is supported in a clamping groove of a cylindrical section of the clamp main body (1) through the supporting screw (2), and the other end of the pressing plate (6) is tightly pressed against a side nozzle part (9); The positioning part further comprises a rear positioning gasket (7) and a lower positioning gasket (8), wherein the rear positioning gasket (7) and the lower positioning gasket (8) are respectively arranged on the side face and the bottom face of the step face where the side mouth part (9) is located, and the rear positioning gasket (7) and the lower positioning gasket (8) are used for adjusting the clamping position of the side mouth part (9).
  2. 2. A numerical control lathe fixture for machining side-mouth parts according to claim 1, characterized in that the thickness of the rear positioning pad (7) and the lower positioning pad (8) is determined according to the size and position requirements of the nozzle to be machined of the side-mouth parts (9).
  3. 3. A numerical control lathe fixture for machining side-mouth parts according to claim 1, characterized in that the adjusting fastener comprises a first fastening nut (11), an adjusting screw (12), the adjusting screw (12) being mounted on the positioning block (10) and being fixed by the first fastening nut (11).
  4. 4. A numerical control lathe fixture for machining side-mouth parts according to claim 1, characterized in that the positioning fastener comprises a positioning screw (13) and a second fastening nut (14), the positioning screw (13) being mounted on the positioning block (10) and being fixed by the second fastening nut (14).
  5. 5. A numerical control lathe fixture for machining side-mouth parts according to claim 3, characterized in that the positioning part further comprises a first limit nut (15) and a second limit nut (16), the first limit nut (15) and the second limit nut (16) are mounted on the adjusting screw (12) for adjusting the distance between the positioning block (10) and the side face of the step section of the fixture body (1).
  6. 6. The numerical control lathe clamp for machining side-mouth parts, according to claim 1, is characterized in that the clamp plate fastener comprises a tensioning screw rod (3), a compression nut (4) and a gasket (5), the tensioning screw rod (3) is installed on the clamp plate (6) and fixed through the compression nut (4), the gasket (5) is installed between the compression nut (4) and the clamp plate (6), a radial positioning hole is formed in the joint of the step surface of the clamp main body (1) and the end surface of the cylindrical section, the tensioning screw rod (3) is installed in the radial positioning hole of the clamp main body (1), and the tensioning screw rod (3) is connected with the clamp main body (1) through threads.
  7. 7. The numerical control lathe clamp for machining side-mouth parts according to claim 6, wherein the clamping part is used for driving the pressing plate (6) to press the side-mouth parts (9) by adjusting the supporting screw (2) and tightening the pressing nut (4) according to the lever principle.
  8. 8. The numerical control lathe clamp for machining side nozzle parts according to claim 1, wherein the pressing plate (6) is L-shaped, the end parts of the pressing plate press the side nozzle parts (9) through symmetrically arranged pressing feet, and the pressing plate (6) is designed into corresponding different shapes according to the shapes of the side nozzle parts (9).
  9. 9. The clamping method of the numerical control lathe fixture for machining side-nozzle parts according to claim 6, which is characterized by comprising the following steps: Connecting one end of a clamp main body (1) with a main shaft of a machine tool; selecting a corresponding pressing plate (6) according to the size and position requirements of a nozzle to be processed of the side nozzle part (9); According to the size and position requirements of the to-be-machined joint of the side nozzle part (9), the thicknesses of the rear positioning gasket (7) and the lower positioning gasket (8) are calculated, and the positions of the positioning blocks (10) are adjusted to ensure that the central shaft of the to-be-machined joint is coaxial with the main shaft of the machine tool; the pressing plate (6) is driven to press the side nozzle parts (9) by adjusting the supporting screw (2) and tightening the pressing nut (4).

Description

Numerical control lathe fixture for machining side nozzle parts and clamping method Technical Field The invention belongs to the field of machining tool fixtures, and particularly relates to a numerical control lathe fixture for machining and a clamping method. Background In the valve structure of liquid rocket engine, there are many parts (hereinafter referred to as side-nozzle parts) composed of multiple channels or nozzles, the shape of the parts is irregular, and strict size and position requirements exist between the nozzles of each channel. Because of the irregular shape and strict dimensional tolerance, the side nozzle parts cannot be directly clamped on a lathe or a milling machine. At present, the common solution is to clamp the parts in the machining process by combining the clamps, so as to finish the machining of the corresponding parts. When the parts are clamped, the combined clamp is required to be assembled on a main shaft of the machine tool, so that the axis of the machined part of the parts is coaxial with the main shaft of the machine tool, and the main shaft of the machine tool is required to be provided with a corresponding interface to clamp the combined clamp on the main shaft of the machine tool, so that the use limitation is high. Meanwhile, the combined clamp is large in size, the diameter is often 240-360 mm or even larger, the combined clamp is composed of a plurality of clamp blocks, the combined clamp is heavy in mass, repeated disassembly is needed when the combined clamp is matched and assembled with a machine tool during machining of side mouth parts, the assembly and disassembly processes are complex, the labor intensity of operators is high, the clamping strength is low, the stability is poor, the rotating speed of a machine tool is not too high during machining, and the machining efficiency of the parts is affected. Disclosure of Invention The invention aims to overcome the defects of the prior art, provides a numerical control lathe clamp for machining side nozzle parts and a clamping method, and solves the problem that the side nozzle parts in an aerospace valve automatic machine are inconvenient to clamp in the machining process. Compared with the traditional combined clamp, the quick clamping of the side nozzle parts is realized, the production period of the parts is shortened, the machining precision of the parts is ensured, and the machining efficiency is improved. In order to achieve the aim, the technical scheme adopted by the invention is that the numerical control lathe fixture for machining the side nozzle parts comprises a fixture main body, a positioning part and a clamping part; The clamp comprises a clamp main body and a clamp main body, wherein the clamp main body comprises a cylindrical section and a stage, one end of the cylindrical section is connected with a main shaft of a machine tool, the other end of the cylindrical section is connected with a step section, and clamping grooves are formed in the side wall surface of the cylindrical section; The positioning part comprises a positioning block, a positioning fastener and an adjusting fastener, wherein one end of the positioning block is connected with a side nozzle part placed on the step surface of the clamp main body through the positioning fastener, the other end of the positioning block is installed in the adjusting fastener installation hole through the adjusting fastener, and the positioning block adjusts the position of the positioning block and the clamp main body through the adjusting fastener so as to ensure that the central shaft of a nozzle to be processed of the side nozzle part is coaxial with the main shaft of the machine tool; The clamping part comprises a supporting screw, a pressing plate fastener and a pressing plate, wherein the pressing plate is arranged on the clamp main body through the pressing plate fastener, one end of the pressing plate is supported in a clamping groove of a cylindrical section of the clamp main body through the supporting screw, and the other end of the pressing plate compresses the side nozzle part. The positioning part further comprises a rear positioning gasket and a lower positioning gasket, wherein the rear positioning gasket and the lower positioning gasket are respectively arranged on the side surface and the bottom surface of the step surface where the side nozzle part is positioned, and the rear positioning gasket and the lower positioning gasket are used for adjusting the clamping position of the side nozzle part. Further, the thicknesses of the rear positioning gasket and the lower positioning gasket are determined according to the size and the position requirements of the to-be-processed joint of the side nozzle part. Further, the adjusting fastener comprises a first fastening nut and an adjusting screw, and the adjusting screw is installed on the positioning block and fixed through the first fastening nut. Further, the positioning fastener com