Nozzle outer wall fine grinding fixing tool

Abstract

A nozzle outer wall fine grinding fixed frock, including core pole, one end of core pole is equipped with first end, the other end of core pole is equipped with top cover, the other end of core pole is connected with connecting piece through screw thread, connecting piece is equipped with second end, nozzle is equipped on core pole, top cover is located in nozzle, the inside end of connecting piece is abutted on the outside end of top cover, first end is passed in nozzle inside, the inside end of second end is abutted on the end of nozzle other end.This utility model provides the end cover and connecting column of outer wall round, first, improve the contact area between and jaw, thereby improve the stability after clamping, to avoid the problem of relative rotation, second, the outer wall of both is cylindrical structure, so it is convenient to carry out the center clamping operation through the jaw, thereby improve the fine grinding precision.

Description

Technical Field

[0001] This utility model relates to the field of cemented carbide part processing technology, and in particular to a fixture for precision grinding and fixing of the outer wall of a nozzle. Background Technology

[0002] like Figure 7 The diagram shows a three-dimensional structure of a nozzle made of cemented carbide through isostatic pressing and sintering. After machining, the outer wall needs to be finely ground to meet the roughness requirements. Due to its irregular shape, it is difficult to hold and fix it with clamps on a fine grinding machine. This is mainly reflected in the fact that the clamping accuracy is low during the fine grinding process, resulting in uneven thickness of the nozzle wall after fine grinding. In addition, the small contact area between the clamps and the outer wall of the nozzle after clamping causes the nozzle to move relative to the clamps. Utility Model Content

[0003] This invention provides a nozzle outer wall precision grinding and fixing fixture to overcome the shortcomings of the prior art and solve the problems existing in nozzle precision, and has strong practicality.

[0004] In order to achieve the purpose of this utility model, the following technology is proposed to be adopted: A nozzle outer wall precision grinding and fixing fixture includes a core rod, one end of which is fitted with a first end sleeve, and the other end of which is fitted with a top sleeve. The other end of the core rod is connected to a connector by a thread, and a second end sleeve is fitted on the connector. The nozzle is fitted on the core rod, the top sleeve is located inside the nozzle, the inner end of the connector abuts against the outer end of the top sleeve, the first end sleeve passes through the inside of the nozzle, and the inner end of the second end sleeve abuts against the other end of the nozzle.

[0005] Furthermore, the core rod includes a first round rod, one end of which is formed with a first screw, the other end of which is formed with a second round rod, the other end of which is formed with a third round rod, the other end of which is formed with a fourth round rod, and the other end of which is formed with a connecting end post. The end of the connecting end post is provided with a threaded hole. The outer diameter of the first round rod is larger than the outer diameter of the first screw. The outer wall of the third round rod is a tapered structure, and the end of the second round rod is the smaller end.

[0006] Furthermore, the first end includes a tapered sleeve fitted onto the first round rod. The outer wall of the tapered sleeve has a tapered structure, and the inner end is the smaller end. An inner hole is formed on the tapered sleeve, and the first round rod passes through the inner hole. An end protrusion ring is formed on the outer periphery of the outer end of the tapered sleeve. The outer diameter of the end protrusion ring is larger than the diameter of the large end of the tapered sleeve. An end sleeve is formed on the outer end of the tapered sleeve. An end hole is formed on the end sleeve that communicates with and is coaxial with the inner hole. The diameter of the inner hole is smaller than the diameter of the end hole. A first screw is located inside the inner hole. A first nut is threaded onto the first screw, and the inner end of the first nut abuts against the inner end of the inner hole.

[0007] Furthermore, a first top ring is sleeved on the first screw, and a plurality of first inserts are fixed on the inner side of the first top ring. The inner end of the first insert is inserted into a first insertion hole opened on the inner end face of the end hole.

[0008] Furthermore, the top sleeve includes a ring body, with a first protrusion formed in a circumferential array on the outer periphery of the outer end of the ring body, and a second protrusion formed in a circumferential array on the inner periphery of the inner end of the ring body. Multiple slots are provided on the outer periphery of the connecting end post, and the second protrusion corresponds to each slot in a one-to-one relationship, with the second protrusion inserted into its corresponding slot.

[0009] Furthermore, the second end includes a ring sleeve, the inner wall of which is provided with multiple limiting grooves, the first protrusion and the limiting groove are in a one-to-one correspondence, and the first protrusion is inserted into the corresponding limiting groove. The outer end of the ring sleeve is formed with a connecting post, the outer diameter of the connecting post is smaller than the outer diameter of the ring sleeve, the outer end of the connecting post is provided with a circular groove, the inner end of the circular groove is provided with a connecting hole, and the inner diameter of the connecting hole is smaller than the inner diameter of the circular groove.

[0010] Furthermore, the connector includes a second screw threaded into a threaded hole. One end of the second screw is formed with an end post located inside a ring sleeve. The inner end of the end post abuts against the outer end of the ring body. The other end of the end post is formed with a third screw. The third screw passes through the connecting hole and the circular groove. A second collar is fitted on the third screw. The inner side of the second collar is fixed with a second insertion hole that can be inserted into the inner end face of the circular groove. The outer end of the third screw is threadedly connected with a second nut. The inner end of the second nut abuts against the outer side of the second collar.

[0011] The advantages of the above technical solution are: This utility model provides an end sleeve with a circular outer wall and a connecting post, which firstly increases the contact area between the end sleeve and the gripper, thereby improving the stability after clamping and preventing relative rotation. Secondly, since both the end sleeve and the connecting post have a cylindrical outer wall, it is convenient to perform centering clamping operations through the gripper, thereby improving the precision of fine grinding.

[0012] This utility model, through the setting of limiting groove, first protrusion, second protrusion and slot, can constrain the periphery of ring body, ring sleeve and core rod after the nozzle is fixed, so as to prevent the rotation direction of the nozzle during the grinding process from being the same as the screwing direction of the second screw, which would cause the second screw to move out of the threaded hole and affect the fixing effect of the nozzle. Attached Figure Description

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will provide a further detailed description of this utility model in conjunction with the accompanying drawings.

[0014] Figure 1 A cross-sectional structural diagram of one embodiment is shown.

[0015] Figure 2 A three-dimensional structural diagram of the core rod is shown.

[0016] Figure 3 A cross-sectional view of the first end is shown.

[0017] Figure 4 A three-dimensional structural diagram of the top sleeve is shown.

[0018] Figure 5 A cross-sectional view of the second end is shown.

[0019] Figure 6 A three-dimensional structural diagram of the connector is shown.

[0020] Figure 7 A three-dimensional structural diagram of the nozzle is shown. Detailed Implementation

[0021] like Figure 7 As shown, a nozzle includes a tube body 1, one end of which is formed with a conical nozzle 10. The conical nozzle 10 has a conical hole 15 inside. The diameter of the outer end of the conical hole 15 is larger than the diameter of its inner end. The inner end of the conical hole 15 has a first connecting hole 14. The other end of the first connecting hole 14 is connected to a second connecting hole 13. The other end of the second connecting hole 13 is connected to a third connecting hole 12. The other end of the third connecting hole 12 is connected to a fourth connecting hole 12. The other end of the fourth connecting hole 12 is connected to a fifth connecting hole 11. The outer periphery of the second connecting hole 13 has a conical structure, and the end located at the first connecting hole 14 is the smaller end. The inner diameter of the fifth connecting hole 11 is larger than the inner diameter of the fourth connecting hole 12.

[0022] like Figures 1-7 As shown, a nozzle outer wall precision grinding fixing fixture includes a core rod 2, one end of which is fitted with a first end 3, and the other end of which is fitted with a top sleeve 4. The other end of the core rod 2 is connected to a connector 5 by a thread, and a second end 6 is fitted on the connector. A nozzle 1 is fitted on the core rod 2, the top sleeve 4 is located inside the nozzle 1, the inner end of the connector 5 abuts against the outer end of the top sleeve 4, the first end 3 passes through the inside of the nozzle 1, and the inner end of the second end 6 abuts against the other end of the nozzle 1.

[0023] The core rod 2 includes a first round rod 22, one end of which is formed with a first screw 23, the other end of which is formed with a second round rod 24, the other end of which is formed with a third round rod 25, the other end of which is formed with a fourth round rod 26, and the other end of which is formed with a connecting end post 27. The end of the connecting end post 27 is provided with a threaded hole 29. The outer diameter of the first round rod 22 is larger than the outer diameter of the first screw 23. The outer wall of the third round rod 25 is tapered and is located at the smaller end of the second round rod 24.

[0024] The first end 3 includes a tapered sleeve 30 sleeved on the first round rod 22. The outer wall of the tapered sleeve 30 has a tapered structure and the inner end is the smaller end. The tapered sleeve 30 has an inner hole 36. The first round rod 22 passes through the inner hole 36. The outer periphery of the outer end of the tapered sleeve 30 is formed with an end protrusion ring 31. The outer diameter of the end protrusion ring 31 is larger than the diameter of the large end of the tapered sleeve 30. The outer end of the tapered sleeve 30 is formed with an end sleeve 32. The end sleeve 32 has an end hole 33 that communicates with and is coaxial with the inner hole 36. The diameter of the inner hole 36 is smaller than the diameter of the end hole 33. The first screw 23 is located in the inner hole 36. The first screw 23 is connected to the first nut 20 by a thread. The inner end of the first nut 20 abuts against the inner end of the inner hole 36. A first top ring 35 is sleeved on the first screw 23. A plurality of first inserts 34 are fixed on the inner side of the first top ring 35. The inner end of the first insert 34 is inserted into the first insertion hole opened on the inner end face of the end hole 33.

[0025] The top sleeve 4 includes a ring 40. The outer periphery of the outer end of the ring 40 has a first protrusion 41 formed in a circumferential array, and the inner periphery of the inner end of the ring 40 has a second protrusion 42 formed in a circumferential array. The outer periphery of the connecting end post 27 has a plurality of slots 28, and the second protrusion 42 corresponds one-to-one with the slot 28, and the second protrusion 42 is inserted into the corresponding slot 28.

[0026] The second end 6 includes a ring 60, the inner wall of which is provided with a plurality of limiting grooves 63. The first protrusion 41 corresponds one-to-one with the limiting groove 63, and the first protrusion 41 is inserted into the corresponding limiting groove 63. The outer end of the ring 60 is formed with a connecting post 67, the outer diameter of the connecting post 67 is smaller than the outer diameter of the ring 60, the outer end of the connecting post 67 is provided with a circular groove 62, the inner end of the circular groove 62 is provided with a connecting hole 61, the inner diameter of the connecting hole 61 is smaller than the inner diameter of the circular groove 62.

[0027] The connector 5 includes a second screw 51 that is threaded into the threaded hole 29. One end of the second screw 51 is formed with an end post 50, which is located inside the ring 60. The inner end of the end post 50 abuts against the outer end of the ring 40. The other end of the end post 50 is formed with a third screw 52, ​​which passes through the connecting hole 61 and the circular groove 62. A second collar 65 is fitted on the third screw 52. The inner side of the second collar 65 is fixed with a second insertion hole that can be inserted into the inner end face of the circular groove 62. The outer end of the third screw 52 is threaded into a second nut 21, and the inner end of the second nut 21 abuts against the outer side of the second collar 65.

[0028] In application, the operator inserts the first screw 23 through the fifth connecting hole 11 so that the first screw 23 is located in the tapered hole 15. At the same time, the second round rod 24 is located in the first connecting hole 14, the third round rod 25 is located in the second connecting hole 13, and the outer periphery of the third round rod 25 abuts against the inner wall of the second connecting hole 13. The fourth round rod 26 is located in the fourth connecting hole 12, and the connecting end post 27 is located in the fifth connecting hole 11.

[0029] Next, the operator puts the tapered sleeve 30 on the first round rod 22, and then tightens the first nut 20 to make the outer wall of the tapered sleeve 30 abut against the inner wall of the tapered hole 15.

[0030] The operator then places the ring 40 onto the connecting end post 27, inserts the second protrusion 42 into the slot 28, and places the ring sleeve 60 onto the outer end of the ring 40. At the same time, the first protrusion 41 is inserted into the limiting groove 63, and the third screw 52 passes through the connecting hole 61. Then, the second nut 21 is screwed onto the third screw 52. During screwing, the inner end of the ring 40 abuts against the inner end face of the fifth connecting hole 11, and the inner end of the ring sleeve 60 abuts against the end of the tube 1.

[0031] Then, the connecting column 67 and the end sleeve 32 are clamped and fixed by the jaws on the precision bed, and the nozzle is finely ground by rotation.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A fixture for precision grinding and fixing of the outer wall of a nozzle, characterized in that, Includes a core rod (2), one end of which is fitted with a first end (3), and the other end of which is fitted with a top sleeve (4). The other end of the core rod (2) is connected to a connector (5) by a thread, and a second end (6) is fitted on the connector. The nozzle (1) is fitted on the core rod (2), the top sleeve (4) is located inside the nozzle (1), the inner end of the connector (5) abuts against the outer end of the top sleeve (4), the first end (3) passes through the inside of the nozzle (1), and the inner end of the second end (6) abuts against the end of the other end of the nozzle (1).

2. The nozzle outer wall precision grinding fixing fixture according to claim 1, characterized in that, The core rod (2) includes a first round rod (22), one end of which is formed with a first screw (23), the other end of which is formed with a second round rod (24), the other end of which is formed with a third round rod (25), the other end of which is formed with a fourth round rod (26), the other end of which is formed with a connecting end post (27), and the end of the connecting end post (27) is provided with a threaded hole (29). The outer diameter of the first round rod (22) is larger than the outer diameter of the first screw (23), the outer wall of the third round rod (25) is a tapered structure, and the end of the second round rod (24) is the small end.

3. The nozzle outer wall precision grinding fixing fixture according to claim 2, characterized in that, The first end (3) includes a tapered sleeve (30) sleeved on the first round rod (22). The outer wall of the tapered sleeve (30) is tapered, and the inner end is the small end. An inner hole (36) is opened on the tapered sleeve (30). The first round rod (22) passes through the inner hole (36). An end ring (31) is formed on the outer periphery of the outer end of the tapered sleeve (30). The outer diameter of the end ring (31) is larger than the diameter of the large end of the tapered sleeve (30). An end sleeve (32) is formed on the outer end of the tapered sleeve (30). An end hole (33) is opened on the end sleeve (32) and is coaxial with the inner hole (36). The diameter of the inner hole (36) is smaller than the diameter of the end hole (33). The first screw (23) is located in the inner hole (36). A first nut (20) is connected to the first screw (23) by a thread. The inner end of the first nut (20) abuts against the inner end of the inner hole (36).

4. The nozzle outer wall precision grinding fixing fixture according to claim 3, characterized in that, A first top ring (35) is sleeved on the first screw (23). Multiple first inserts (34) are fixed on the inner side of the first top ring (35). The inner end of the first insert (34) is inserted into the first insertion hole opened on the inner end face of the end hole (33).

5. The nozzle outer wall precision grinding fixing fixture according to claim 2, characterized in that, The top sleeve (4) includes a ring (40), with a first protrusion (41) formed in a circumferential array on the outer periphery of the outer end of the ring (40), and a second protrusion (42) formed in a circumferential array on the inner periphery of the inner end of the ring (40). Multiple slots (28) are provided on the outer periphery of the connecting end post (27). The second protrusion (42) corresponds to the slot (28) one by one, and the second protrusion (42) is inserted into the slot (28) corresponding to it.

6. The nozzle outer wall precision grinding fixing fixture according to claim 5, characterized in that, The second end (6) includes a ring (60), the inner wall of which is provided with multiple limiting grooves (63), the first protrusion (41) and the limiting groove (63) are in a one-to-one correspondence, and the first protrusion (41) is inserted into the corresponding limiting groove (63). The outer end of the ring (60) is formed with a connecting post (67), the outer diameter of the connecting post (67) is smaller than the outer diameter of the ring (60), the outer end of the connecting post (67) is provided with a circular groove (62), the inner end of the circular groove (62) is provided with a connecting hole (61), the inner diameter of the connecting hole (61) is smaller than the inner diameter of the circular groove (62).

7. The nozzle outer wall precision grinding fixing fixture according to claim 6, characterized in that, The connector (5) includes a second screw (51) that is threaded into a threaded hole (29). One end of the second screw (51) is formed with an end post (50), which is located inside a ring (60). The inner end of the end post (50) abuts against the outer end of the ring (40). The other end of the end post (50) is formed with a third screw (52), which passes through the connecting hole (61) and the circular groove (62). A second collar (65) is fitted on the third screw (52). The inner side of the second collar (65) is fixed with a second insertion hole that can be inserted into the inner end face of the circular groove (62). The outer end of the third screw (52) is threaded with a second nut (21), which abuts against the outer side of the second collar (65).

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