Search

CN-122008107-A - Pipe fitting internal stay formula centering and terminal surface follow-up clamping mechanism

CN122008107ACN 122008107 ACN122008107 ACN 122008107ACN-122008107-A

Abstract

The invention provides a pipe fitting internal stay type centering and end face follow-up clamping mechanism, and relates to the technical field of pipe fitting machining. The mechanism comprises a V-shaped block and a clamping mechanism, wherein the clamping mechanism comprises a side supporting plate, a guide rod, a push block, an outer tube and a centering fixing piece, a first channel is arranged in the guide rod, a cylindrical cavity communicated with the first channel is arranged in the adjusting block, and a rotatable switching valve plate is arranged in the cylindrical cavity. The switching valve plate is in partition linkage with an oil way in the regulating block through the annular rod, oil sequentially enters the first oil cavity to push the pushing block under single hydraulic drive, so that the centering fixing piece radially tightens the pipe fitting to realize centering, then enters the second oil cavity to push the annular piston, so that the end fixing piece axially clamps the end face of the pipe fitting, and the reverse order is released during oil return. The automatic sequential action of centering first and then clamping the end face is realized through hydraulic logic, and the automatic sequential action device is compact in structure, simple and convenient to operate, suitable for processing pipe fittings with different pipe diameters, reliable in clamping and high in centering precision.

Inventors

  • WANG XIN
  • WANG DONG
  • YU DEPING
  • QIAN FANG

Assignees

  • 扬州华宇管件有限公司

Dates

Publication Date
20260512
Application Date
20260331

Claims (10)

  1. 1. An internal bracing type centering and end face follow-up clamping mechanism for a pipe fitting is characterized by comprising, V type piece (100) and clamping mechanism, be provided with pipe fitting (300) on V type piece (100), clamping mechanism includes side support plate (201), sets up guide arm (202) in side support plate (201) one side, sets up in ejector pad (203) of guide arm (202) tip, side support plate (201) one side still is provided with outer tube (204), outer tube (204) set up in the guide arm (202) outside, be provided with centering mounting (205) on outer tube (204), be provided with regulating block (400) on guide arm (202), regulating block (400) outside is provided with tip mounting (500), be provided with first passageway (202 a) in guide arm (202), be provided with cylinder chamber (401) and first passageway (202 a) communicate with each other in regulating block (400), be provided with in cylinder chamber (401) and switch valve plate (600).
  2. 2. The pipe fitting internal stay formula centering and terminal surface follow-up clamping mechanism of claim 1, wherein, push away piece (203) one end outside and be provided with conical surface (203 a), push away piece (203) set up in outer tube (204) inboard, push away piece (203) inside is provided with first oil pocket (203 b), guide arm (202) tip is provided with piston plate (202 b), first passageway (202 a) communicates with each other with first oil pocket (203 b).
  3. 3. The pipe fitting internal bracing type centering and end face follow-up clamping mechanism according to claim 2, wherein a first annular groove (402) is further arranged in the adjusting block (400), an oil inlet hole (403) is formed in the end portion of the first annular groove (402), the oil inlet hole (403) is communicated with the cylindrical cavity (401), a second annular groove (404) is further arranged in the cylindrical cavity (401) and communicated with the first annular groove (402), and a second oil cavity (406) is formed in the outer side of the adjusting block (400).
  4. 4. The pipe fitting internal bracing type centering and end face follow-up clamping mechanism according to claim 3, wherein an annular rod (405) is arranged in the cylindrical cavity (401), a first limiting ring plate (402 a) and a second limiting ring plate (402 b) are arranged in the first annular groove (402), the first limiting ring plate (402 a) and the second limiting ring plate (402 b) divide the first annular groove (402) into an oil inlet area (402 c), a linkage area (402 d) and an oil outlet area (402 e), the oil inlet hole (403) is communicated with the oil inlet area (402 c), the oil outlet area (402 e) is communicated with the second oil cavity (406) through a second channel (402 f), and the second annular groove (404) is communicated with the linkage area (402 d).
  5. 5. The pipe fitting internal stay formula centering and end face follow-up clamping mechanism according to claim 4, wherein a third channel (601) is arranged in the switching valve plate (600), a linkage block (602) is arranged at the bottom of the switching valve plate (600), and the linkage block (602) penetrates through the second annular groove (404) to be connected with the annular rod (405).
  6. 6. The pipe fitting internal stay type centering and end face follow-up clamping mechanism according to claim 5, wherein a first end plate (405 a) and a second end plate (405 b) are respectively arranged at two ends of the annular rod (405), the first end plate (405 a) is arranged in the oil inlet area (402 c), and the second end plate (405 b) is arranged in the oil outlet area (402 e).
  7. 7. The pipe fitting internal stay formula centering and terminal surface follow-up clamping mechanism of claim 6, wherein be provided with fan-shaped groove (407) in cylinder chamber (401) bottom, be provided with dead lever (407 a) in fan-shaped groove (407), switching valve plate (600) back is provided with movable rod (603), be connected through first spring (604) between movable rod (603) and dead lever (407 a).
  8. 8. The pipe fitting internal stay formula centering and end face follow-up clamping mechanism as claimed in claim 7, wherein a fourth channel (408) is arranged on the side wall of the cylindrical cavity (401), the fourth channel (408) is further communicated with the other end of the second oil cavity (406), and the second oil cavity (406) is further communicated with an oil tank.
  9. 9. The pipe fitting internal stay type centering and end face follow-up clamping mechanism according to claim 8, wherein an annular piston (700) is arranged in the second oil cavity (406), one side of the annular piston (700) is connected with a piston rod (701), and the other end of the piston rod (701) is connected with an end fixing piece (500).
  10. 10. The pipe fitting internal bracing type centering and end face follow-up clamping mechanism according to claim 9, wherein a radial pipe (204 c) is arranged on the outer pipe (204), an annular groove (204 d) is formed in the inner wall of the radial pipe (204 c), the centering fixing piece (205) comprises a fixing shaft (205 a) and an end cap (205 b), the fixing shaft (205 a) is arranged in the radial pipe (204 c), a limiting plate (205 c) is arranged on the outer side of the fixing shaft (205 a), a second spring (205 d) is arranged on one side of the limiting plate (205 c) and connected with the annular groove (204 d), the end cap (205 b) is sleeved on one end of the fixing shaft (205 a), and an arc plate (205 e) is arranged on the end cap (205 b).

Description

Pipe fitting internal stay formula centering and terminal surface follow-up clamping mechanism Technical Field The invention belongs to the technical field of pipe fitting machining, and particularly relates to a pipe fitting internal stay type centering and end face follow-up clamping mechanism. Background In the pipe fitting machining process, such as welding, cutting, assembling and other procedures, reliable clamping of the pipe fitting is generally required to ensure machining precision and operation stability. For clamping of tubular workpieces, radial centering of the pipe fitting is needed, centering of the axis of the pipe fitting and a machining reference is guaranteed, axial limiting of the end part of the pipe fitting is needed, and movement of the pipe fitting in the machining process is prevented. In the prior art, radial centering and end face clamping are often controlled by two independent driving mechanisms, for example, a centering element and an end face pressing element are driven by a hydraulic cylinder or an air cylinder respectively, so that the structure is complex, the occupied space is large, and a plurality of control valves and detection elements are required to be configured to realize sequential control of actions, so that the equipment cost is high and the maintenance is difficult. In some schemes, sequential actions are attempted to be realized through mechanical linkage, but the problems that action time sequences are not adjustable, clamping forces are mutually influenced and the like exist, and the requirements of centering precision and end face clamping reliability are difficult to meet at the same time. In addition, when the existing clamping mechanism is used for replacing pipe fittings with different specifications, the suitability of the centering element and the inner wall of the pipe fitting is poor, and the surface of the pipe fitting is easy to crush or the centering is inaccurate. Therefore, there is a need for a pipe clamping mechanism that is compact, has a controllable sequence of actions, and is easy to operate, so as to achieve reliable operation of radial centering followed by axial clamping. Disclosure of Invention This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application. In order to solve the technical problems, the technical scheme is that the pipe fitting internal support type centering and end face follow-up clamping mechanism comprises a V-shaped block and a clamping mechanism, wherein the V-shaped block is provided with a pipe fitting, the clamping mechanism comprises a side supporting plate, a guide rod arranged on one side of the side supporting plate and a push block arranged at the end part of the guide rod, one side of the side supporting plate is also provided with an outer pipe, the outer pipe is arranged on the outer side of the guide rod, a centering fixing piece is arranged on the outer pipe, an adjusting block is arranged on the guide rod, an end fixing piece is arranged on the outer side of the adjusting block, a first channel is arranged in the guide rod, a cylindrical cavity is arranged in the adjusting block and communicated with the first channel, and a switching valve plate is arranged in the cylindrical cavity. As a preferable technical scheme of the pipe fitting internal supporting type centering and end face follow-up clamping mechanism, a conical surface is arranged on the outer side of one end of the push block, the push block is arranged on the inner side of the outer pipe, a first oil cavity is formed in the push block, a piston plate is arranged at the end part of the guide rod, and the first channel is communicated with the first oil cavity. As a preferable technical scheme of the pipe fitting internal bracing type centering and end face follow-up clamping mechanism, a first annular groove is further formed in the adjusting block, an oil inlet is formed in the end portion of the first annular groove, the oil inlet is communicated with the cylindrical cavity, a second annular groove is further formed in the cylindrical cavity and communicated with the first annular groove, and a second oil cavity is formed in the outer side of the adjusting block. As a preferred technical scheme of the pipe fitting internal stay type centering and end face follow-up clamping mechanism, an annular rod is arranged in the cylindrical cavity, a first limiting ring plate and a second limiting ring plate are arranged in the first annular groove, the first limiting ring plate and the second limiting ring plate divide the first annular groove into an oil inlet area, a linkage area and an oil outlet area, the oil inlet hole is communicated with the oil inlet area, the