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CN-116372792-B - Liquid abrasive finishing clamp

CN116372792BCN 116372792 BCN116372792 BCN 116372792BCN-116372792-B

Abstract

The invention relates to a liquid abrasive finishing clamp. The clamp comprises a clamp sleeve, a clamp body, a driving structure and a driving structure, wherein the clamp sleeve is connected with a driving main shaft, the clamp sleeve is driven to rotate around a first axis through the driving main shaft, the clamp body is arranged on one axial side of the clamp sleeve and comprises a ring sleeve and a core die arranged in the ring sleeve, the ring sleeve is provided with a clamping structure which is used for fixing a workpiece to be processed between the core die and the inner side wall of the ring sleeve so as to form an abrasive material drainage gap between a processing surface of the workpiece to be processed and the core die, the driving structure is connected between the clamp sleeve and the clamp body and is used for driving the clamp body to rotate around a second axis, the first axis is perpendicular to the central axis of the clamp sleeve, the second axis is parallel or coincident with the central axis of the clamp sleeve, and the central axis of the ring sleeve is perpendicular to the second axis. The invention can ensure the processing quality without damaging the original shape of the workpiece, so that the abrasive can sufficiently scratch the surface of the workpiece and can meet the processing requirements of the workpiece with thin wall and curved surface.

Inventors

  • LIU YANLEI
  • KANG SHIJIE
  • YU ZIYANG
  • Pang Haozhe
  • ZHOU KAI
  • JIAO CHEN
  • LIU FUXI
  • SUN YULI
  • SHEN LIDA

Assignees

  • 南京航空航天大学无锡研究院

Dates

Publication Date
20260512
Application Date
20230322

Claims (10)

  1. 1. A liquid abrasive finishing fixture for attachment to a drive spindle of a liquid abrasive finishing apparatus, the liquid abrasive finishing fixture comprising: a clamp sleeve (1) connected to the drive spindle, the clamp sleeve (1) being driven to rotate about a first axis by the drive spindle; the fixture comprises a fixture body (2) which is arranged on one axial side of a fixture sleeve (1), wherein the fixture body (2) comprises a ring sleeve (21) and a core die (22) arranged in the ring sleeve (21), the ring sleeve (21) is provided with a clamping structure (23), and the clamping structure (23) is used for fixing a workpiece (100) to be processed between the core die (22) and the inner side wall of the ring sleeve (21), so that an abrasive material drainage gap (20) is formed between a processing surface of the workpiece (100) to be processed and the core die (22); a driving structure (3) connected between the clamp sleeve (1) and the clamp body (2) for driving the clamp body (2) to rotate around a second axis; The first axis is perpendicular to the central axis of the clamp sleeve (1), the second axis is parallel to or coincides with the central axis of the clamp sleeve (1), and the central axis of the ring sleeve (21) is perpendicular to the second axis.
  2. 2. A liquid abrasive finishing clamp according to claim 1, characterized in that the clamp sleeve (1) has a clamping ring extending at one axial end, the clamping ring comprising a pair of clamping half-rings (11), each clamping half-ring (11) being provided at one radial end with a web (12), the drive spindle passing through the clamping ring, the clamping half-rings (11) being clamped to the drive spindle by webs (12).
  3. 3. A liquid abrasive finishing clamp as defined in claim 1, wherein, The driving structure (3) comprises a driving motor (31), and a driving rod (24) connected with an output shaft of the driving motor (31) extends along the radial outer side wall of the ring sleeve (21).
  4. 4. A liquid abrasive finishing clamp according to claim 3, characterized in that the other axial end of the clamp sleeve (1) is provided with a containing groove (13), the clamp sleeve (1) is connected with a sleeve cover (14) for sealing the containing groove (13), the driving motor (31) is arranged in the containing groove (13), and an output shaft of the driving motor (31) penetrates through the sleeve cover (14) and is connected with the driving rod (24).
  5. 5. A liquid abrasive finishing clamp as claimed in claim 1, wherein the clamping structure (23) comprises through holes (211) circumferentially distributed on the collar (21) and a tightening member connected to the through holes (211), one end of the tightening member being tightened against the outer side wall of the workpiece (100) to be machined.
  6. 6. A liquid abrasive finishing clamp as claimed in claim 5, wherein said through hole (211) comprises a threaded hole and said tightening member comprises a screw.
  7. 7. A liquid abrasive finishing clamp as claimed in claim 1, wherein a connecting rib (25) is connected between the core die (22) and the inner side wall of the ring sleeve (21).
  8. 8. A liquid abrasive finishing clamp as claimed in claim 1, wherein said workpiece (100) to be machined comprises a thin-walled annular workpiece.
  9. 9. A liquid abrasive finishing clamp as claimed in claim 1, wherein said core die (22) is of cylindrical configuration, said core die (22) being concentric with said collar (21).
  10. 10. A liquid abrasive finishing clamp as claimed in claim 1, wherein the abrasive drainage gap (20) is 1.5±0.2mm.

Description

Liquid abrasive finishing clamp Technical Field The invention relates to the technical field of finishing processing, in particular to a liquid abrasive finishing clamp. Background In recent years, abrasive grain flow finishing techniques have significantly reduced workpiece roughness and successfully improved the surface quality of many workpieces with difficult to machine surfaces. However, the abrasive flow processing machine tool commonly used at present generally adopts a closed cavity to apply pressure to enable the abrasive and the inner cavity to be scratched sufficiently so as to achieve the polishing purpose, and for a workpiece with a thin wall and a curved surface, the processing pressure is too large, so that the pressure applied to the workpiece is difficult to control during processing, the workpiece is easy to deform, and the polishing requirement is difficult to achieve. Disclosure of Invention The invention provides a liquid abrasive finishing clamp which is provided with a drainage and pressure regulating structure, can enable the pressure born by a workpiece to be controllable and not easy to deform, does not damage the original shape of the workpiece on the premise of ensuring the processing quality, and can meet the processing requirements of the workpiece with thin walls and curved surfaces. In order to solve the above technical problems, the present invention provides a liquid abrasive finishing clamp for connecting to a spindle of a liquid abrasive finishing apparatus, the liquid abrasive finishing clamp comprising: A clamp sleeve connected to the drive spindle, the clamp sleeve being driven to rotate about a first axis by the drive spindle; The fixture body is arranged on one axial side of the fixture sleeve, the fixture body comprises a ring sleeve and a core die arranged in the ring sleeve, the ring sleeve is provided with a clamping structure, and the clamping structure is used for fixing a workpiece to be processed between the core die and the inner side wall of the ring sleeve so as to form an abrasive material drainage gap between the processing surface of the workpiece to be processed and the core die; The driving structure is connected between the clamp sleeve and the clamp body and is used for driving the clamp body to rotate around a second axis; The first axis is perpendicular to the central axis of the clamp sleeve, the second axis is parallel to or coincides with the central axis of the clamp sleeve, and the central axis of the ring sleeve is perpendicular to the second axis. In one embodiment of the invention, the clamping sleeve has a clamping ring extending from one axial end, the clamping ring comprising a pair of clamping half-rings, each of which is provided at one radial end with a web, through which the drive spindle passes, by means of which the clamping half-rings are clamped to the drive spindle. In one embodiment of the present invention, The driving structure comprises a driving motor, and a driving rod connected with an output shaft of the driving motor extends along the radial outer side wall of the ring sleeve. In one embodiment of the invention, the other end of the clamp sleeve in the axial direction is provided with a containing groove, the clamp sleeve is connected with a sleeve cover for sealing the containing groove, the driving motor is arranged in the containing groove, and an output shaft of the driving motor penetrates through the sleeve cover and is connected with the driving rod. In one embodiment of the present invention, the clamping structure includes through holes distributed on the ring sleeve along the circumferential direction and a propping member connected to the through holes, wherein one end of the propping member is propped against the outer side wall of the processing workpiece. In one embodiment of the invention, the through hole comprises a threaded hole and the tightening member comprises a screw. In one embodiment of the invention, a connecting rib is connected between the core mold and the inner side wall of the ring sleeve. In one embodiment of the invention, the work piece comprises a thin-walled annular work piece. In one embodiment of the present invention, the core mold has a cylindrical structure, and the core mold is disposed concentrically with the ring cover. In one embodiment of the invention, the abrasive drainage gap is 1.5±0.2mm. Compared with the prior art, the technical scheme of the invention has the following advantages: The liquid abrasive finishing clamp has a drainage pressure regulating structure, the clamp sleeve rotates around a first axis and the clamp body rotates around a second axis by regulating the rotating speed of the main shaft and the rotating speed of the clamp body, and the abrasive is guided to flow through the processing surface of a workpiece to be processed by arranging the corresponding core mould, so that the flow speed of the abrasive is controllable, the pressure applied to the pro