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CN-121973001-A - PR2 casing head machining clamp

CN121973001ACN 121973001 ACN121973001 ACN 121973001ACN-121973001-A

Abstract

The invention belongs to the technical field of machining clamps, and particularly relates to a PR2 casing head machining clamp which comprises a lower main body assembly and an upper main body assembly, wherein the lower main body assembly comprises a lower base, a piston cavity is formed in the surface of the lower base, a piston is arranged in the piston cavity, the outer wall of the piston is in sliding connection with the inner wall of the piston cavity, a T-shaped chute is formed in the top end of the piston, a lower guide groove is further formed in the surface of the lower base, a lower sliding block is arranged on the surface of the lower base, the lower main body part of the device can be used independently, clamping and centering of an oil casing head shell in each working procedure of a horizontal machining center and a vertical machining center are mainly applied, and after the upper part and the lower part are combined together, the device is mainly used for clamping flange workpieces, the precision of clamping the workpieces can be ensured, and the stability and reliability of the whole clamp structure are enhanced.

Inventors

  • LI ZITIAN
  • LIU YONGDA
  • SHAN CHANGSHUAI
  • Wen hongshan
  • ZHANG YONGCHAO
  • HU LIJUAN
  • ZHAO AN

Assignees

  • 胜利油田胜机石油装备有限公司

Dates

Publication Date
20260505
Application Date
20260210

Claims (10)

  1. 1. A PR2 casing head machining fixture is characterized by comprising a lower main body assembly (1) and an upper main body assembly (2); The utility model provides a lower part body subassembly (1) is including lower part base (11), piston chamber (12) have been seted up on the surface of lower part base (11), the inside in piston chamber (12) is provided with piston (13), the outer wall of piston (13) with the inner wall sliding connection in piston chamber (12), T type chute (14) have been seted up on the top of piston (13), lower part guide way (15) have still been seted up on the surface of lower part base (11), the surface of lower part base (11) is provided with slider (16), slider (16) pass through lower part guide way (15) with lower part base (11) sliding connection, slider (16) pass through T type chute (14) still with piston (13) sliding connection.
  2. 2. The PR2 casing head machining fixture according to claim 1, wherein the lower guide groove (15) is a T-shaped slide groove.
  3. 3. The PR2 casing head machining fixture according to claim 2, wherein the piston cavity (12) is formed in the axial surface of the lower base (11), three T-shaped inclined grooves (14) are uniformly distributed along the axis of the other end of the piston (13), three lower guide grooves (15) are uniformly distributed along the circumferential direction of the lower base (11), the lower guide grooves (15) penetrate through the side wall of the lower base (11) in the radial direction, and extension lines of the lower guide grooves (15) are all intersected with the axis of the lower base (11).
  4. 4. The PR2 casing head machining fixture according to claim 3, wherein the outer side ends of the lower slider (16) are detachably connected with supporting blocks (17).
  5. 5. The PR2 casing head machining fixture according to claim 4, wherein a cylinder (18) is mounted on the lower surface of the lower base (11), and an output shaft of the cylinder (18) is fixedly connected with the piston (13).
  6. 6. The PR2 casing head machining fixture as claimed in claim 5, wherein the upper main body assembly (2) is arranged above the lower main body assembly (1), the upper main body assembly (2) comprises an upper base (21) fixedly connected to the upper surface of the lower base (11), a cylindrical groove (22) is formed in the surface of the upper base (21), a workpiece (23) is arranged in the cylindrical groove (22), three upper guide grooves (24) are uniformly formed in the upper base (21) along the circumferential direction, the upper guide grooves (24) are also T-shaped sliding grooves, upper sliding blocks (25) are arranged above the lower sliding blocks (16), and the upper sliding blocks (25) are in sliding connection with the upper base (21) through the upper guide grooves (24).
  7. 7. The PR2 casing head machining fixture according to claim 6, wherein connecting rods (26) are arranged on the lower end surfaces of the lower sliding blocks (16), the upper ends of the connecting rods (26) are hinged to the upper sliding blocks (25), the lower ends of the connecting rods (26) are hinged to the lower sliding blocks (16), rotating shafts (27) are fixedly connected to the surfaces of the connecting rods (26), and the rotating shafts (27) are rotatably connected with the upper base (21).
  8. 8. The PR2 casing head machining fixture according to claim 7, wherein the inner side end of the upper slider (25) is detachably connected with a supporting block (17).
  9. 9. The PR2 casing head machining fixture as claimed in claim 8, wherein the clamping surfaces of the supporting blocks (17) are provided with rubber buffer layers made of nitrile rubber.
  10. 10. The PR2 casing head machining fixture according to claim 9, wherein the lower base (11), the piston (13), the lower slider (16), the upper base (21) and the upper slider (25) are all made of high-strength alloy steel and are subjected to quenching treatment.

Description

PR2 casing head machining clamp Technical Field The invention belongs to the technical field of machining clamps, and particularly relates to a PR2 casing head machining clamp. Background In the manufacturing process of petroleum and natural gas drilling equipment, a casing head is used as a key pressure-bearing member, the machining precision of the casing head directly influences the safe operation of an oil and gas well, a PR2 casing head shell and related flange workpieces generally have the characteristics of complex structure, high dimensional precision requirement, large weight and the like, a plurality of working procedures (such as milling, drilling, boring, tapping and the like) are needed in the machining process, and the machining equipment is needed to be converted between a horizontal machining center and a vertical machining center for a plurality of times; For machining complex workpieces such as a sleeve head, the traditional clamp often has the problems of uneven clamping force, insufficient centering precision, limited application range and the like, and particularly in the machining process of an oil sleeve head shell and flange workpieces, the existing clamp is difficult to simultaneously meet the requirements of uniform clamping force, automatic centering and adjustable inner and outer diameter clamping due to the complex shape of the workpieces and high machining precision requirements; For this purpose, a PR2 casing head machining jig is designed to solve the above-mentioned problems. Disclosure of Invention To solve the problems set forth in the background art. The invention provides a PR2 casing head machining clamp, wherein the lower main body part of the device can be used independently, the clamping and centering of the oil casing head shell during the machining of each working procedure in a horizontal machining center and a vertical machining center are mainly applied, the upper part and the lower part are combined together and are mainly used for clamping flange workpieces, the precision of clamping the workpieces can be ensured, and the stability and reliability of the whole clamp structure are enhanced. In order to achieve the above purpose, the PR2 casing head machining clamp comprises a lower main body assembly and an upper main body assembly, wherein the lower main body assembly comprises a lower base, a piston cavity is formed in the surface of the lower base, a piston is arranged in the piston cavity, the outer wall of the piston is in sliding connection with the inner wall of the piston cavity, a T-shaped chute is formed in the top end of the piston, a lower guide groove is further formed in the surface of the lower base, a lower sliding block is arranged on the surface of the lower base, the lower sliding block is in sliding connection with the lower base through the lower guide groove, and the lower sliding block is in sliding connection with the piston through the T-shaped chute. As a preferable PR2 casing head machining fixture, the lower guide groove is a T-shaped chute. As the PR2 casing head machining clamp, the piston cavity is formed in the axial surface of the lower base, three T-shaped inclined grooves are uniformly distributed along the axis of the other end of the piston, three lower guide grooves are uniformly distributed along the circumferential direction of the lower base, the lower guide grooves penetrate through the side wall of the lower base in the radial direction, and the extension lines of the lower guide grooves are all intersected with the axis of the lower base. As the PR2 casing head machining clamp, the outer side ends of the lower sliding blocks are detachably connected with supporting blocks. As a PR2 casing head machining fixture, preferably, a cylinder is mounted on the lower surface of the lower base, and an output shaft of the cylinder is fixedly connected with the piston. As the PR2 casing head machining clamp, the upper main body assembly is preferably arranged above the lower main body assembly, the upper main body assembly comprises an upper base fixedly connected to the upper surface of the lower base, a cylindrical groove is formed in the surface of the upper base, a workpiece is arranged in the cylindrical groove, three upper guide grooves are uniformly formed in the upper base along the circumferential direction, the upper guide grooves are also T-shaped sliding grooves, and upper sliding blocks are arranged above the lower sliding blocks and are in sliding connection with the upper base through the upper guide grooves. As the PR2 casing head machining clamp, the lower end surface of the lower sliding block is provided with the connecting rod, the upper end of the connecting rod is hinged with the upper sliding block, the lower end of the connecting rod is hinged with the lower sliding block, the surfaces of the connecting rod are fixedly connected with the rotating shaft, and the rotating shaft is in rotating connection with