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CN-122008004-A - Pipe cylindrical grinding device

CN122008004ACN 122008004 ACN122008004 ACN 122008004ACN-122008004-A

Abstract

The invention discloses a pipe excircle grinding device, and relates to the technical field of grinding equipment. According to the invention, the supporting platform is arranged between the driving grinding wheel and the driving guide wheel, the lower supporting seat with the inclined top surface is arranged in the middle of the supporting platform, so that the lower supporting seat can be matched with the cooling liquid guiding groove arranged at the top end of the lower supporting seat to directionally collect and guide cooling liquid in the supporting area while the bottom of the pipe is supported, the surface of the nickel-titanium pipe can always contact with the cooling liquid for heat exchange, the air guide cavity is arranged in the lower supporting seat, and compressed air is guided to the surface of the pipe through the compressed air outlet which is arranged in an upward inclined manner, thereby providing an auxiliary effect for the rotation of the pipe in the supporting area, reducing the blocking influence of friction at the bottom of the traditional rigid support on the rotation of the pipe, and effectively improving the rotation stability and the surface grinding uniformity of the pipe in the grinding process.

Inventors

  • LIU ZHEN
  • Sheng Zhenfang

Assignees

  • 康钛医疗科技(苏州)有限公司

Dates

Publication Date
20260512
Application Date
20260409

Claims (10)

  1. 1. The utility model provides a tubular product excircle abrasive machining device which characterized in that includes: The machine comprises a centerless grinding machine frame (1), wherein the top end of the centerless grinding machine frame is provided with a driving grinding wheel (11) and a driving guide wheel (12), and a pipe machining channel is formed between the driving grinding wheel (11) and the driving guide wheel (12); The support platform (2) is arranged above the centerless grinder frame (1) and is positioned between the driving grinding wheel (11) and the driving guide wheel (12), guide mechanisms are arranged at two ends of the support platform (2), each guide mechanism comprises two symmetrically distributed guide bases (21), guide plates (22) are fixedly arranged at the top ends of one sides, close to each other, of the two guide bases (21), and cooling liquid outlets (23) are formed in one sides, close to each other, of the two guide plates (22); the lower supporting seat (3), its fixed mounting is in the middle part of supporting platform (2), the top of lower supporting seat (3) is established to the slope structure, and the top middle part of lower supporting seat (3) is equipped with coolant liquid guiding groove (31), the inside of lower supporting seat (3) is equipped with air guide chamber (32), the lateral wall top of lower supporting seat (3) is equipped with compressed air outlet (33), compressed air outlet (33) establish to ascending slope structure and with air guide chamber (32) inside intercommunication, compressed air outlet (33) are used for guiding compressed air to tubular product surface in order to assist tubular product rotation.
  2. 2. The pipe cylindrical grinding apparatus as claimed in claim 1, further comprising: The branch air guide opening (34) is arranged at the top end of the air guide cavity (32), a branch air guide block (341) is arranged between the branch air guide opening (34) and the compressed air outlet (33), and the cross section of the branch air guide block (341) is of a wedge-shaped structure and is used for guiding compressed air in the air guide cavity (32) to the compressed air outlet (33) and the branch air guide opening (34) respectively; The top of the branch air guide port (34) is provided with a floating air outlet (35) and a contact surface air outlet (36), a guide block (361) with a wedge-shaped structure is arranged between the floating air outlet (35) and the contact surface air outlet (36), the floating air outlet (35) is used for guiding compressed air between a pipe and the lower supporting seat (3) to form an air cushion layer, the contact surface air outlet (36) is communicated with a notch of the cooling liquid guide groove (31), and the contact surface air outlet (36) is used for guiding cooling liquid attached to the surface of the pipe into the cooling liquid guide groove (31).
  3. 3. The pipe cylindrical grinding apparatus as claimed in claim 1, further comprising: A cooling liquid inlet groove (311) which is arranged in the middle of the groove bottom of the cooling liquid guiding groove (31); and a main coolant inlet (312) fixedly installed at the outer top end of the lower support base (3) and communicated with the inside of the coolant inlet groove (311).
  4. 4. The pipe cylindrical grinding apparatus as claimed in claim 1, further comprising: The cooling liquid discharge cover (313) is fixedly arranged in the middle of the outer side of the lower supporting seat (3), a plurality of cooling liquid discharge openings (314) are formed in the top end of the outer side wall of the lower supporting seat (3), the top ends of the cooling liquid discharge openings (314) are communicated with the cooling liquid guide groove (31), the bottom ends of the cooling liquid discharge openings (314) are communicated with the cooling liquid discharge cover (313), and the cooling liquid discharge cover (313) and the cooling liquid discharge openings (314) form a cooling liquid guide discharge structure together.
  5. 5. The pipe cylindrical grinding apparatus as claimed in claim 1, further comprising: And the compressed air inlet (321) is fixedly arranged at the bottom end of the outer side of the lower supporting seat (3) and is communicated with the air guide cavity (32).
  6. 6. The pipe cylindrical grinding apparatus as claimed in claim 1, further comprising: And a sub-coolant inlet (231) fixedly mounted on the outer tip of the guide plate (22) and communicating with the coolant outlet (23).
  7. 7. The pipe cylindrical grinding device according to claim 1, wherein: The bottom of guide holder (21) is through the outside swing joint of round pin axle and supporting platform (2), and two adjacent install fixing base (213) between guide holder (21), and fixing base (213) fixed mounting is in the top of supporting platform (2), and two adjacent the middle part of guide holder (21) is all run through and is equipped with logical groove (212), two logical groove (212) are run through respectively at the both ends of fixing base (213), two adjacent the middle part of guide holder (21) is all installed locating screw (214) through the screw thread, and the bottom of locating screw (214) is laminated with the upper surface of fixing base (213), two adjacent install extension spring (215) between the bottom of guide holder (21), angle adjustment mechanism of two guide holders (21) is constituteed jointly to fixing base (213), locating screw (214) and extension spring (215).
  8. 8. The pipe cylindrical grinding device according to claim 1, wherein: the guide seat is characterized in that an installation groove (211) is formed in the top end of the inner side of the guide seat (21), and the guide plate (22) is fixedly installed in the installation groove (211) through bolts.
  9. 9. The pipe cylindrical grinding device according to claim 1, wherein: the coolant outlet (23) is provided in a downwardly inclined configuration.
  10. 10. The pipe cylindrical grinding device according to claim 1, wherein: The bottom fixed mounting of supporting platform (2) has one-level slip table (13), and one-level slip table (13) slidable installs in the top of centerless grinder frame (1), the top slidable of one-level slip table (13) installs second grade slip table (14), driving guide wheel (12) are through the rotatable top of installing in second grade slip table (14) of bearing.

Description

Pipe cylindrical grinding device Technical Field The invention relates to the technical field of grinding equipment, in particular to a pipe cylindrical grinding device. Background The nickel-titanium tube has good superelasticity, shape memory effect, corrosion resistance and biocompatibility, can be widely applied to the fields of medical instruments, precise guide members, high-performance elastic elements and the like, and has important application value in interventional medical instruments, minimally invasive conveying members and other high-precision thin-wall tubes. The nickel-titanium pipe generally has the characteristics of small outer diameter, thin wall thickness, large elasticity, poor heat conduction performance and the like, and in the subsequent precision machining process, high requirements are put on the supporting mode, the cooling mode and the guiding stability of a machining device. In the finish machining process of the excircle of the nickel-titanium pipe, the size precision, roundness and surface quality of the excircle of the nickel-titanium pipe are required to be further improved in a grinding mode, however, due to the fact that the nickel-titanium pipe has thin walls and high elastic material characteristics, the nickel-titanium pipe is easy to elastically deform due to uneven local stress in the grinding process, and further machining precision is affected. Particularly, when the nickel-titanium pipe is continuously processed in a centerless grinding mode, the workpiece is supported, rotated and fed under the combined action of the driving grinding wheel, the driving guide wheel and the lower supporting structure, and the contact state, the cooling liquid distribution state and the workpiece rotation state of the bottom supporting area can directly influence the stability and the processing quality of the whole grinding process. Therefore, a processing device suitable for cylindrical grinding of nickel-titanium pipes is needed to solve the problems of large bottom friction, easy retention of cooling liquid, poor rotation stability, insufficient guiding suitability and the like of the existing centerless grinding equipment when the nickel-titanium pipes are processed, so that the support stability, the cooling effect and the processing quality in the grinding process of the nickel-titanium pipes are improved. Therefore, it is necessary to invent a pipe cylindrical grinding device to solve the above problems. Disclosure of Invention The invention aims to provide a pipe cylindrical grinding device for solving the problems in the background art. In order to achieve the purpose, the invention provides the following technical scheme that the pipe cylindrical grinding device comprises: The machine frame of the centerless grinder, its top installs initiative emery wheel and driving guide wheel, form the tubular product processing channel between driving emery wheel and driving guide wheel; The support platform is arranged above the centerless grinder frame and is positioned between the driving grinding wheel and the driving guide wheel, guide mechanisms are arranged at two ends of the support platform, the guide mechanisms comprise two symmetrically distributed guide seats, guide plates are fixedly arranged at the top ends of one sides, close to each other, of the two guide seats, and cooling liquid outlets are formed in one sides, close to each other, of the two guide plates; the lower supporting seat is fixedly arranged in the middle of the supporting platform, the top end of the lower supporting seat is of an inclined structure, the middle of the top end of the lower supporting seat is provided with a cooling liquid guide groove, an air guide cavity is arranged in the lower supporting seat, a compressed air outlet is arranged at the top end of the outer side wall of the lower supporting seat, the compressed air outlet is of an upward inclined structure and is communicated with the inside of the air guide cavity, and the compressed air outlet is used for guiding compressed air to the surface of a pipe to assist the pipe to rotate. Preferably, the air guide device further comprises a branch air guide port, wherein the branch air guide port is arranged at the top end of the air guide cavity, a branch air guide block is arranged between the branch air guide port and the compressed air outlet, and the cross section of the branch air guide block is of a wedge-shaped structure and is used for guiding compressed air in the air guide cavity to the compressed air outlet and the branch air guide port respectively; The top of the branch air guide port is provided with a floating air outlet and a contact surface air outlet, a guide block with a wedge-shaped structure is arranged between the floating air outlet and the contact surface air outlet, the floating air outlet is used for guiding compressed air between the pipe and the lower supporting seat to form an air cushion layer, the contact surf