Clamping tool for precise manufacturing of superhard parts

Abstract

The utility model discloses a superhard part precision manufacturing clamping tool, which belongs to the field of superhard part precision manufacturing and comprises a base, the base can be mounted on a machine tool platform, a mounting seat is arranged on the base, a counter bore is arranged in the center of the upper end face of the mounting seat, a plurality of radial threaded holes are uniformly distributed on the circumference of the side wall of the counter bore, and the radial threaded holes are communicated with the mounting seat. An adjusting screw is screwed in the radial threaded hole; a bottom hole is formed in the bottom of the counter bore, the inner diameter of the counter bore is larger than that of the bottom hole, a screw is arranged in the center of the bottom of the bottom hole, a pressing mechanism is screwed to the position, away from the bottom hole, of the screw, the screw can be sleeved with a workpiece, and the workpiece can be positioned in the counter bore by pressing the upper end of the workpiece through the pressing mechanism. The device further comprises a liftable annular pressing plate, the annular pressing plate can be arranged on the outer side of the workpiece in a sleeving mode to press the workpiece downwards, and the structure is high in positioning precision, high in universality and low in production cost.

Description

Technical Field

[0001] The utility model relates to the field of precision manufacturing of superhard parts, in particular to a clamping tool for precision manufacturing of superhard parts. Background Art

[0002] The precision manufacturing of superhard parts in radiation-resistant scenarios has the characteristics of high special hardness of materials, high precision of shape and position tolerance of hole feature size, high requirements for cleanliness of direct contact objects, and easy deformation. Due to its functional design, the materials are mostly high-temperature alloys and cannot be in direct contact with ferrite; the structures are mostly shaft sleeve parts, with large grooves and evenly distributed high-precision small holes in the outer circumferential direction of the sleeve, and grooves in the position of the inner hole of the sleeve. The internal and external features have an angular position relationship, so the milling process is the core process to ensure the qualified product size. Among the many factors in milling, the product milling tooling is undoubtedly one of the most critical factors.

[0003] The milling tools currently used by some manufacturers have problems such as workpiece deformation under the action of clamping force; loss of precision after multiple clamping and alignment; workpiece displacement after clamping; workpiece displacement during the process under the action of milling force and vibration; low efficiency of clamping and alignment of batch processing workpieces; and failure to meet cleanliness requirements.

[0004] In view of the above problems, the utility model designs and manufactures a superhard parts precision manufacturing clamping tool to overcome the above defects. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the utility model provides a superhard parts precision manufacturing clamping tool, which has high positioning accuracy, strong versatility and low production cost.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a superhard parts precision manufacturing clamping tool, comprising a base, the base can be mounted on a machine tool platform, a mounting seat is provided on the base, a countersunk hole is provided at the center of the upper end surface of the mounting seat, a plurality of radial threaded holes are evenly distributed on the circumference of the side wall of the countersunk hole, and an adjusting screw is screwed into the radial threaded hole;

[0007] A bottom hole is provided at the bottom of the countersunk hole, the inner diameter of the countersunk hole is larger than the inner diameter of the bottom hole, a screw is provided at the center of the bottom of the bottom hole, and a clamping mechanism is screwed to the screw away from the bottom hole, so that the workpiece can be sleeved on the screw and the upper end of the workpiece can be clamped by the clamping mechanism to position the workpiece in the countersunk hole;

[0008] It also includes a liftable annular pressing plate, which can be sleeved on the outside of the workpiece to press the workpiece downward.

[0009] Preferably, a plurality of tightening screw holes are evenly distributed on the circumference of the mounting seat located at the periphery of the countersunk hole, and the tightening screw holes are screwed with tightening screws;

[0010] The annular pressing plate is provided with a plurality of connection holes evenly distributed on its circumference, and the clamping screw drives the annular pressing plate to be pressed downward through the connection holes.

[0011] Preferably, the mounting seat is configured as a step column, the countersunk hole is disposed on the upper end surface of the step column, and the clamping screw hole is disposed on the step surface of the step column.

[0012] Preferably, the clamping mechanism comprises a gland and a nut, and the nut is threadedly connected to the screw rod;

[0013] A through hole is provided at the center of the gland, and the diameter of the through hole is larger than the diameter of the screw;

[0014] The nut can drive the pressure cover to press the workpiece downward.

[0015] Preferably, the gland is evenly distributed with a plurality of light holes or a plurality of notches connected to the side wall of the gland;

[0016] The distance between the position of the light hole or the slot close to the center of the gland and the center of the gland is greater than the maximum radial radius of the nut.

[0017] Preferably, the mounting seat, the annular pressure plate and the pressure cover are all made of 304 stainless steel.

[0018] Preferably, the inner wall of the countersunk hole is clearance-matched with the workpiece in the countersunk hole.

[0019] Preferably, the end of the adjusting screw is provided with a matching hole, and a ball-head nylon column is connected to the matching hole;

[0020] The end of the ball-head nylon column can be brought into contact with the workpiece by turning the adjusting screw.

[0021] Preferably, the ball head nylon column is interference fit with the matching hole.

[0022] Preferably, a vertical threaded hole is provided at the bottom of the bottom hole, and the screw rod is threaded in the vertical threaded hole.

[0023] The utility model is beneficial in that:

[0024] 1. When the workpiece processing position is adjusted, the utility model avoids the workpiece displacement during the clamping adjustment process, greatly reducing the risk of scrapping caused by workpiece displacement. In addition, the clamping position switching caused by the workpiece processing position adjustment is convenient and fast, which can improve the clamping switching efficiency.

[0025] 2. The workpiece of the utility model is axially pressed by a pressure cover or an annular pressure plate, which is beneficial to ensure the processing accuracy of the superhard workpiece and control cutting vibration and deformation.

[0026] 3. The utility model sets the workpiece sleeve on the screw rod and presses the upper end of the workpiece through the clamping mechanism to position the workpiece in the countersink, and then mills the outer circle feature of the workpiece. After completing the above processing, directly use the annular pressure plate to clamp the outer side of the workpiece, and after verifying the outer circle runout, release the clamping mechanism and process the inner hole feature of the workpiece, thereby avoiding the precision loss of secondary positioning, clamping, alignment, and setting of angular direction, avoiding the precision loss of the relative position of difficult-to-process materials, and improving the processing efficiency.

[0027] 4. The utility model provides a light hole or a notch on the pressure cover, which is convenient for aligning the workpiece and setting the value of the machine tool, thereby ensuring the accuracy of the workpiece and reducing the conversion error. It can also reduce the pressing force area and evenly apply force to the workpiece.

[0028] 5. The adjusting screw of the utility model utilizes the end of the ball head nylon column to abut against the workpiece, thereby ensuring the cleanliness requirement of the radiation-resistant workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of a clamping tool for precision manufacturing of superhard parts after clamping the workpiece;

[0030] Figure 2 This is a front view of a clamping tool for precision manufacturing of superhard parts after clamping the workpiece;

[0031] Figure 3 It is a schematic diagram of the mounting seat of the utility model;

[0032] Figure 4 It is a cross-sectional view of the mounting seat of the utility model;

[0033] Figure 5 It is a schematic diagram of the annular pressure plate of the utility model;

[0034] Figure 6 It is a schematic diagram of the gland of the utility model;

[0035] Figure 7 It is a schematic diagram of the adjusting screw of the utility model.

[0036] In the figure: 1-base, 2-mounting seat, 3-clamping screw, 4-annular pressure plate, 5-pressure cover, 6-nut, 7-screw, 8-workpiece, 9-adjusting screw, 21-clamping screw hole, 22-countersunk hole, 23-radial threaded hole, 24-bottom hole, 25-vertical threaded hole, 41-connecting hole, 51-slot, 52-through hole, 91-ball head nylon column. DETAILED DESCRIPTION

[0037] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0038] like Figures 1 to 7As shown, a clamping tool for precision manufacturing of superhard parts includes a base 1, and the base 1 can be installed on a machine tool platform. Specifically, the base 1 preferably adopts a disc-like structure and uses ordinary carbon steel material. A plurality of outer ring countersunk holes are provided on the base 1 near the outer ring. The outer ring countersunk holes are fixed to the T-blocks in the T-slots of the machine tool platform by bolts. Of course, other positioning and fixing methods can also be used.

[0039] A mounting seat 2 is provided on the base 1. Specifically, a plurality of inner circle countersunk holes are provided on the base 1 near the inner circle, and the base 1 is connected to the mounting seat 2 through the inner circle countersunk holes and bolts. Of course, the base 1 and the mounting seat 2 can also be provided as one piece.

[0040] A countersunk hole 22 is provided at the center of the upper end surface of the mounting seat 2, and the inner wall of the countersunk hole 22 is clearance-matched with the workpiece 8 in the countersunk hole 22. A plurality of radial threaded holes 23 are evenly distributed on the circumference of the side wall of the countersunk hole 22, and an adjusting screw 9 is threaded in the radial threaded hole 23. A bottom hole 24 is provided at the bottom of the countersunk hole 22, and the inner diameter of the countersunk hole 22 is larger than the inner diameter of the bottom hole 24. The bottom hole 24 is provided to avoid air and ensure that the positioning surface of the workpiece 8 can cooperate with the step of the countersunk hole 22.

[0041] A screw rod 7 is provided at the bottom center of the bottom hole 24 of the utility model, and the screw rod 7 extends toward the direction of the countersunk hole 22. Specifically, a vertical threaded hole 25 is provided at the bottom of the bottom hole 24, and the screw rod 7 is threaded in the vertical threaded hole 25. A clamping mechanism is threaded on the screw rod 7 away from the bottom hole 24. The workpiece 8 can be sleeved on the screw rod 7 and the upper end of the workpiece 8 is clamped by the clamping mechanism to position the workpiece 8 in the countersunk hole 22. The side wall of the countersunk hole 22 is preferably evenly distributed with four radial threaded holes 23 around the circumference. By rotating the adjusting screw 9, the head of the adjusting screw 9 can be brought into contact with the side wall of the workpiece 8, thereby completing the circumferential clamping of the workpiece 8.

[0042] The invention also comprises a liftable annular pressing plate 4 , which can be sleeved on the outside of the workpiece 8 to press the workpiece 8 downward.

[0043] When processing the workpiece 8, the workpiece 8 is sleeved on the screw 7 and the upper end of the workpiece 8 is pressed by the clamping mechanism to position the workpiece 8 in the countersunk hole 22, and then the outer cylindrical feature of the workpiece 8 is milled. After completing the above processing, the annular pressure plate 4 is directly used to clamp the outer side of the workpiece 8. After verifying the outer cylindrical runout, the clamping mechanism is released to process the inner hole feature of the workpiece 8, thereby avoiding the precision loss of secondary positioning, clamping, alignment, and setting of angular direction, avoiding the precision loss of the relative position of difficult-to-process materials, and improving the processing efficiency.

[0044] Specifically, a plurality of clamping screw holes 21 are evenly distributed on the circumference of the mounting seat 2 located outside the countersunk hole 22, and clamping screws 3 are screwed into the clamping screw holes 21. A plurality of connecting holes 41 are evenly distributed on the circumference of the annular pressure plate 4. The clamping screws 3 drive the annular pressure plate 4 to be pressed downward through the connecting holes 41. In the present embodiment, four clamping screw holes 21 are provided. When the annular pressure plate 4 is pressed downward, the clamping screws 3 are evenly screwed in and tightened diagonally.

[0045] The mounting seat 2 is preferably configured as a stepped column, the countersunk hole 22 is disposed on the upper end surface of the stepped column, and the tightening screw hole 21 is disposed on the stepped surface of the stepped column.

[0046] The clamping mechanism of the utility model specifically includes a gland 5 and a nut 6. The nut 6 is screwed on the screw 7. A through hole 52 is provided at the center of the gland 5. The diameter of the through hole 52 is larger than the diameter of the screw 7. The nut 6 can drive the gland 5 to press down the workpiece 8. The gland 5 is preferably evenly distributed with a plurality of light holes or a plurality of notches 51 connected to the side wall of the gland 5. The distance between the light hole or notch 51 near the center of the gland 5 and the center of the gland 5 is greater than the maximum radial radius of the nut 6. By arranging the light hole or notch 51 on the gland 5, it is convenient to align the workpiece 8, facilitate the setting of the machine tool, ensure the accuracy of the workpiece 8, reduce the conversion error, and also reduce the clamping force area, so as to evenly apply the force to the workpiece 8.

[0047] The mounting seat 2 , the annular pressure plate 4 and the pressure cover 5 are preferably all made of 304 stainless steel to ensure the radiation resistance and cleanliness requirements of the workpiece 8 .

[0048] A matching hole is provided at the end of the adjusting screw 9 of the utility model, in which a ball-head nylon column 91 is connected. The ball-head nylon column 91 is interference fit with the matching hole, and the end of the ball-head nylon column 91 can be made to abut against the workpiece 8 by rotating the adjusting screw 9, thereby ensuring the cleanliness requirement of the radiation-resistant workpiece 8.

[0049] The entire structure avoids the displacement of the workpiece 8 during the clamping adjustment process when the workpiece 8 is adjusted in the processing position, greatly reducing the risk of scrapping caused by the displacement of the workpiece 8. In addition, the clamping position switching caused by the adjustment of the processing position of the workpiece 8 is convenient and fast, which can improve the clamping switching efficiency. Moreover, the workpiece 8 is axially pressed by the pressure cover 5 or the annular pressure plate 4, which is conducive to ensuring the processing accuracy of the superhard workpiece 8 and controlling the cutting vibration and deformation.

[0050] The specific working steps of this utility model are:

[0051] First, the base 1 and the mounting seat 2 are connected together, and then the base 1 is connected to the T-block in the T-slot of the machine tool platform by bolts, placed in the center of the machine tool platform, and the working surface of the mounting seat 2 is milled to ensure that there is no foreign matter on the surface;

[0052] The screw rod 7 is screwed and connected with the vertical threaded hole 25, and the workpiece 8 is sleeved on the screw rod 7 and placed on the countersunk hole 22 of the mounting seat 2; the radial threaded hole 23 on the side wall of the countersunk hole 22 is installed with the adjusting screw 9, and the position of the workpiece 8 on the mounting seat 2 is fine-tuned by adjusting the screwing length of the adjusting screw 9 at 4 places, and the adjusting screw 9 is fixed after the alignment requirements of the process drawing are met;

[0053] Turn the machine tool platform to confirm the alignment data again. When the requirements are met, put the gland 5 into the screw 7 and place it on the workpiece 8 in the center. Screw the nut 6 and the screw 7 together to axially press the workpiece 8.

[0054] Verify the end face runout of the workpiece 8 through the notch 51 of the gland 5, and after confirming that there is no problem, mill the outer circle feature of the workpiece 8;

[0055] After the outer circle feature is processed, the annular pressure plate 4 is inserted into the workpiece 8 and placed in the center. After the clamping screws 3 are evenly screwed and tightened diagonally, the outer circle runout of the workpiece 8 is verified. After confirming that there is no abnormality, the nut 6, the pressure cover 5, and the screw 7 are removed, and the inner hole feature of the workpiece 8 is milled.

[0056] It should be understood that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the protection scope defined by the claims attached to this application.

Claims

1. A superhard parts precision manufacturing clamping tool, characterized in that: The invention comprises a base (1), wherein the base (1) can be mounted on a machine tool platform, wherein a mounting seat (2) is provided on the base (1), wherein a countersunk hole (22) is provided at the center of the upper end surface of the mounting seat (2), wherein a plurality of radial threaded holes (23) are evenly distributed on the circumference of the side wall of the countersunk hole (22), and wherein an adjusting screw (9) is threadedly connected in the radial threaded hole (23); A bottom hole (24) is provided at the bottom of the countersunk hole (22); the inner diameter of the countersunk hole (22) is larger than the inner diameter of the bottom hole (24); a screw rod (7) is provided at the center of the bottom of the bottom hole (24); a clamping mechanism is screwed to the screw rod (7) at a position away from the bottom hole (24); a workpiece (8) can be sleeved on the screw rod (7) and the upper end of the workpiece (8) can be clamped by the clamping mechanism to position the workpiece (8) in the countersunk hole (22); It also comprises a liftable annular pressing plate (4), wherein the annular pressing plate (4) can be sleeved on the outside of the workpiece (8) to press the workpiece (8) downward.

2. A superhard parts precision manufacturing clamping tool according to claim 1, characterized in that: A plurality of clamping screw holes (21) are evenly distributed on the circumference of the mounting seat (2) located outside the countersunk hole (22), and clamping screws (3) are screwed to the clamping screw holes (21); A plurality of connection holes (41) are evenly distributed on the circumference of the annular pressure plate (4), and the clamping screws (3) drive the annular pressure plate (4) to press downward through the connection holes (41).

3. A superhard parts precision manufacturing clamping tool according to claim 2, characterized in that: The mounting seat (2) is configured as a step column, the countersunk hole (22) is disposed on the upper end surface of the step column, and the tightening screw hole (21) is disposed on the step surface of the step column.

4. The superhard parts precision manufacturing clamping tool according to claim 1 is characterized in that: The clamping mechanism comprises a pressure cover (5) and a nut (6), wherein the nut (6) is screwed onto the screw rod (7); A through hole (52) is provided at the center of the gland (5), and the diameter of the through hole (52) is larger than the diameter of the screw (7); The nut (6) can drive the pressure cover (5) to press down the workpiece (8).

5. The superhard parts precision manufacturing clamping tool according to claim 4 is characterized in that: The gland (5) is evenly distributed on its circumference with a plurality of light holes or a plurality of notches (51) communicating with the side wall of the gland (5); The distance between the position of the light hole or the slot (51) close to the center of the gland (5) and the center of the gland (5) is greater than the maximum radial radius of the nut (6).

6. The superhard parts precision manufacturing clamping tool according to claim 4, characterized in that: The mounting seat (2), the annular pressure plate (4) and the pressure cover (5) are all made of 304 stainless steel.

7. The superhard parts precision manufacturing clamping tool according to claim 1 is characterized in that: The inner wall of the counterbore (22) is clearance-matched with the workpiece (8) in the counterbore (22).

8. The superhard parts precision manufacturing clamping tool according to claim 1, characterized in that: The end of the adjusting screw (9) is provided with a matching hole, and a ball-head nylon column (91) is connected to the matching hole; The end of the ball-head nylon column (91) can be brought into contact with the workpiece (8) by rotating the adjusting screw (9).

9. The superhard parts precision manufacturing clamping tool according to claim 8, characterized in that: The ball head nylon column (91) is interference fit with the matching hole.

10. The superhard parts precision manufacturing clamping tool according to claim 1, characterized in that: A vertical threaded hole (25) is provided at the bottom of the bottom hole (24), and the screw rod (7) is screwed into the vertical threaded hole (25).

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