A fixture capable of realizing double-end grinding of blades and its usage method

Abstract

The present invention discloses a fixture capable of realizing double-sided grinding of blades and its usage method. The fixture capable of realizing double-sided grinding of blades includes a fixture body, a positioning pin and a positioning ring. The upper surface and the lower surface of the fixture body are parallel to each other. A plurality of limiting grooves penetrating through the upper surface and the lower surface are formed on the fixture body. The positioning pin includes a left limiting column, a positioning table and a right limiting column which are arranged in sequence. The positioning ring is sleeved on the positioning table of the positioning pin. The left side surface of the positioning ring and the left limiting column form a positioning area for the first blade to be ground. The right side surface of the positioning ring and the right limiting column form a positioning area for the second blade to be ground. During operation, the first blade to be ground and the second blade to be ground are both loaded into their positioning areas. The first blade to be ground, the second blade to be ground, the positioning ring and the positioning pin form an integral body and are accommodated in the limiting grooves. The fixture of the present invention has the advantages of simple structure, high processing efficiency, high product qualification rate, etc.

Description

Technical Field

[0001] The present invention mainly relates to the field of metal cutting tools, and particularly relates to a fixture capable of realizing double-end face grinding of a blade and a using method thereof. Background Art

[0002] In order to improve the cutting performance of numerical control blade products, the groove design of numerical control blades is usually relatively complex. The tip of the blade is in an asymmetric structure, and except for the screw hole part, the rest of the blade groove is a three-dimensional structure. There are certain problems in the base surface grinding of such blades: In the prior art, the commonly used method is to use a "planetary disc" structure fixture for large-scale base surface processing of such blades, that is, to limit multiple blades through the "planetary disc" fixture, then place a hard cover plate on the blades for positioning, and then grind the bottom surface of the blades. This method has high efficiency. However, due to the complex structure of the blade groove and the asymmetric tip of the blade positioning part, it is extremely easy to cause the tip of the blade to break and the base surface to be ground obliquely, resulting in a low qualification rate; Another method is to machine the positioning surface of the fixture with an electrode, so that the blade groove fits the fixture positioning, and the tip of the blade avoids the positioning surface. This method will not produce defects such as tip breakage and base surface grinding obliquely, and the qualification rate is relatively high. However, the manufacturing cost of the fixture is relatively high, and the processing efficiency of the blade is low. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a fixture capable of realizing double-end face grinding of a blade with a simple structure, high processing efficiency, and high product qualification rate, and a using method of the fixture with low labor intensity, high processing efficiency, and high product qualification rate.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A fixture capable of realizing double-end face grinding of a blade, including a fixture body, a positioning pin, and a positioning ring. The upper surface and the lower surface of the fixture body are parallel to each other. A plurality of limiting grooves penetrating the upper surface and the lower surface are formed on the fixture body. The positioning pin includes a left limiting column, a positioning table, and a right limiting column arranged in sequence. The positioning ring is sleeved on the positioning table of the positioning pin. The left side surface of the positioning ring and the left limiting column form a positioning area for a first blade to be ground. The right side surface of the positioning ring and the right limiting column form a positioning area for a second blade to be ground. During operation, the first blade to be ground and the second blade to be ground are both installed in their positioning areas, and the first blade to be ground, the second blade to be ground, the positioning ring, and the positioning pin form a whole and are accommodated in the limiting groove.

[0006] As a further improvement of the above technical solution:

[0007] During operation, the first blade to be ground and the second blade to be ground are both installed in their positioning areas. The plane of the first screw hole of the first blade to be ground is in contact with the left side surface of the positioning ring, and the plane of the second screw hole of the second blade to be ground is in contact with the right side surface of the positioning ring. The distance between the bottom surface of the first blade to be ground and the bottom surface of the second blade to be ground is L, the distance between the upper surface and the lower surface of the fixture body is L1, and the length of the positioning pin is L2, which should satisfy: 0.5mm ≤ L - L1 ≤ 2mm, L1 < L2 < L.

[0008] The left side surface of the positioning ring includes a left positioning end face in the middle and a left clearance cone surface on the periphery. The right side surface of the positioning ring includes a right positioning end face in the middle and a right clearance cone surface on the periphery. During operation, the limiting outer circle of the positioning ring is in contact and cooperation with the limiting groove. The upper surface of the first blade to be ground is in contact with the left positioning end face, and the upper surface of the second blade to be ground is in contact with the right positioning end face.

[0009] Both the left positioning end face and the right positioning end face are annular, and their major diameters and minor diameters are D1 and D2 respectively. Both the plane of the first screw hole and the plane of the second screw hole are annular, and their major diameters and minor diameters are D3 and D4 respectively, which should satisfy: D1 > D3 > D4 > D2.

[0010] The diameters of the left limiting post and the right limiting post are D5, and the inner hole diameters of the blades of the first blade to be ground and the second blade to be ground are D6, which should satisfy: 0.01mm ≤ D6 - D5 ≤ 0.1mm.

[0011] The side surface is provided with a transmission connection part, and multiple limiting grooves are evenly distributed along the circumference of the fixture body in multiple circles.

[0012] The positioning pin and the positioning ring are arranged as an integral structure.

[0013] Arc-shaped transition surfaces are provided at the joints of the left limiting post and the positioning ring and at the joints of the right limiting post and the positioning ring.

[0014] A method for using a fixture capable of realizing double-end grinding of blades, using the above-mentioned fixture capable of realizing double-end grinding of blades, includes the following steps:

[0015] S1. Horizontally place the lower surface of the fixture body downward on the working table of the double-end grinding machine;

[0016] S2. Place the bottom surface of the first blade to be ground downward in the limiting groove;

[0017] S3. After installing the positioning ring in place on the positioning pin, place it in the limiting groove, and place the left limiting post in the inner hole of the blade of the first blade to be ground;

[0018] S4. Place the bottom surface of the second blade to be ground facing upwards in the limiting groove, and place the right limiting post into the inner hole of the blade of the second blade to be ground;

[0019] S5. Repeat the above steps S2 to S4 to install all the blades to be ground onto the fixture body.

[0020] As a further improvement of the above technical solution:

[0021] After completing the step S4, the distance between the bottom surface of the second blade to be ground and the upper surface of the fixture body is 0.5 mm - 2 mm.

[0022] Compared with the prior art, the advantages of the present invention are as follows:

[0023] (1) The fixture capable of realizing double-end grinding of blades of the present invention includes a fixture body, a positioning pin and a positioning ring. The upper surface and the lower surface of the fixture body are parallel to each other. A plurality of limiting grooves penetrating the upper surface and the lower surface are provided on the fixture body. The positioning pin includes a left limiting post, a positioning table and a right limiting post arranged in sequence. The positioning ring is sleeved on the positioning table of the positioning pin. The left side surface of the positioning ring and the left limiting post form a positioning area for the first blade to be ground. The right side surface of the positioning ring and the right limiting post form a positioning area for the second blade to be ground. During operation, the first blade to be ground and the second blade to be ground are both installed in their positioning areas. The first blade to be ground, the second blade to be ground, the positioning ring and the positioning pin form a whole and are accommodated in the limiting groove. When grinding the bottom surfaces of the first blade to be ground and the second blade to be ground, both the first blade to be ground and the second blade to be ground can be positioned by the limiting groove, the positioning ring and the positioning pin, and the surface where the tip is located is matched with the positioning ring and placed in the limiting groove, and the tip will not break, improving the product qualification rate, and the bottom surfaces of the first blade to be ground and the second blade to be ground can be ground simultaneously, that is, the two end surfaces of the blades to be ground on both sides can be ground simultaneously in one installation, greatly improving the production efficiency.

[0024] (2) The usage method of the fixture capable of realizing double-sided grinding of blades according to the present invention includes the following steps: S1. Horizontally place the lower surface of the fixture body downward on the working table of the double-sided grinder; S2. Place the bottom surface of the first blade to be ground downward in the limiting groove; S3. After installing the positioning ring in place on the positioning pin, place it in the limiting groove, and make the left limiting post placed in the inner hole of the blade of the first blade to be ground; S4. Place the bottom surface of the second blade to be ground upward in the limiting groove, and make the right limiting post placed in the inner hole of the blade of the second blade to be ground; S5. Repeat the above steps S2 to S4 until all the blades to be ground are installed on the fixture body; after all the blades to be ground are installed in place, install the fixture capable of realizing double-sided grinding of blades on the surface grinder, and start the surface grinder to simultaneously grind the bottom surfaces of all the blades to be ground on the side of the second blade to be ground and the bottom surfaces of all the blades to be ground on the side of the first blade to be ground. Moreover, neither end will affect the tip of the blade to be ground, improving the product qualification rate. One installation can simultaneously realize the grinding of the two end faces of the blades to be ground on both sides, greatly improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a three-dimensional structure diagram of the first embodiment of the fixture capable of realizing double-sided grinding of blades according to the present invention.

[0026] Figure 2 is Figure 1 an enlarged view of A in

[0027] Figure 3 is a partial enlarged view of the cross-sectional structure of the first embodiment of the fixture capable of realizing double-sided grinding of blades according to the present invention.

[0028] Figure 4 is a structural schematic diagram of the positioning pin of the first embodiment of the fixture capable of realizing double-sided grinding of blades according to the present invention.

[0029] Figure 5 is a structural schematic diagram of the positioning ring of the first embodiment of the fixture capable of realizing double-sided grinding of blades according to the present invention.

[0030] Figure 6 is a partial enlarged view of the cross-sectional structure of the second embodiment of the fixture capable of realizing double-sided grinding of blades according to the present invention.

[0031] Figure 7 is a structural schematic diagram of the positioning pin and the positioning ring of the second embodiment of the fixture capable of realizing double-sided grinding of blades according to the present invention.

[0032] Figure 8 is a front view of the blade to be ground.

[0033] Figure 9 is a side view of the blade to be ground.

[0034] Each label in the figure represents:

[0035] 1. Fixture body; 11. Upper surface; 12. Lower surface; 13. Transmission connection part; 2. Positioning pin; 21. Left limit post; 22. Positioning table; 23. Right limit post; 24. Transition surface; 3. Positioning ring; 31. Left side surface; 311. Left positioning end surface; 312. Left clearance cone surface; 32. Right side surface; 321. Right positioning end surface; 322. Right clearance cone surface; 4. Limit groove; 51. First blade to be ground; 511. First screw hole plane; 52. Second blade to be ground; 521. Second screw hole plane; Detailed implementation mode

[0036] The following will further describe the present invention in detail with reference to the specification drawings and specific embodiments.

[0037] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "horizontal", "inner", "outer", "top", "bottom", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention.

[0038] Figures 1 to 5 The first embodiment of the fixture for realizing double-end face grinding of blades according to the present invention is shown. The fixture for realizing double-end face grinding of blades in this embodiment includes a fixture body 1, a positioning pin 2 and a positioning ring 3. The upper surface 11 and the lower surface 12 of the fixture body 1 are parallel to each other. A plurality of limit grooves 4 penetrating the upper surface 11 and the lower surface 12 are provided on the fixture body 1. The positioning pin 2 includes a left limit post 21, a positioning table 22 and a right limit post 23 arranged in sequence. The positioning ring 3 is sleeved on the positioning table 22 of the positioning pin 2. The left side surface 31 of the positioning ring 3 and the left limit post 21 form a positioning area for the first blade 51 to be ground. The right side surface 32 of the positioning ring 3 and the right limit post 23 form a positioning area for the second blade 52 to be ground. During operation, the first blade 51 to be ground and the second blade 52 to be ground are both installed in their positioning areas. The first blade 51 to be ground, the second blade 52 to be ground, the positioning ring 3 and the positioning pin 2 form a whole and are accommodated in the limit groove 4. When grinding the bottom surfaces of the first blade 51 to be ground and the second blade 52 to be ground, the first blade 51 to be ground and the second blade 52 to be ground can be positioned by the limit groove, the positioning ring and the positioning pin. And the surface where the tool tip is located is matched with the positioning ring and placed in the limit groove, and the tool tip will not break, improving the product qualification rate. And it is possible to simultaneously grind the bottom surfaces of the first blade 51 to be ground and the second blade 52 to be ground. That is to say, two end faces can be ground simultaneously in one installation, greatly improving the production efficiency.

[0039] In this embodiment, during operation, the first blade to be ground 51 and the second blade to be ground 52 are both loaded into their positioning areas. The first screw hole plane 511 of the first blade to be ground 51 cooperates with the left side surface 31 of the positioning ring 3, and the second screw hole plane 521 of the second blade to be ground 52 cooperates with the right side surface 32 of the positioning ring 3. The distance between the bottom surface of the first blade to be ground 51 and the bottom surface of the second blade to be ground 52 is L, the distance between the upper surface 11 and the lower surface 12 of the fixture body 1 is L1, and the length of the positioning pin 2 is L2. To ensure that the bottom surfaces of the first blade to be ground 51 and the second blade to be ground 52 can be smoothly ground without affecting the limiting effect of the limiting groove 4 on the first blade to be ground 51 and the second blade to be ground 52, it should satisfy: 0.5 mm ≤ L - L1 ≤ 2 mm, L1 < L2 < L. In this embodiment, L1 = 7 mm, L2 = 7.6 mm, and L = 7.8 mm.

[0040] In this embodiment, the left side surface 31 of the positioning ring 3 includes a left positioning end surface 311 in the middle and a left clearance cone surface 312 on the periphery. The right side surface 32 of the positioning ring 3 includes a right positioning end surface 321 in the middle and a right clearance cone surface 322 on the periphery. During operation, the limiting outer circle 33 of the positioning ring 3 is in contact and cooperation with the limiting groove 4. The upper surface of the first blade to be ground 51 cooperates with the left positioning end surface 311, and the upper surface of the second blade to be ground 52 cooperates with the right positioning end surface 321.

[0041] In this embodiment, both the left positioning end surface 311 and the right positioning end surface 321 are annular, and their major diameters and minor diameters are D1 and D2 respectively. Both the first screw hole plane 511 and the second screw hole plane 521 are annular, and their major diameters and minor diameters are D3 and D4 respectively. To ensure the reliable positioning of the left positioning end surface 311 and the right positioning end surface 321 on the first blade to be ground 51 and the second blade to be ground 52, it should satisfy: D1 > D3 > D4 > D2. In this embodiment, D1 = 5.2 mm, D2 = 4.6 mm, D3 = 5 mm, and D4 = 4.8 mm.

[0042] In this embodiment, the diameters of the left limiting post 21 and the right limiting post 23 are D5, and the inner hole diameters of the first blade to be ground 51 and the second blade to be ground 52 are D6. To facilitate the installation of the first blade to be ground 51 and the second blade to be ground 52 and ensure the positioning reliability, it should satisfy: 0.01 mm ≤ D6 - D5 ≤ 0.1 mm. In this embodiment, D5 = 3.2 mm and D6 = 3.25 mm.

[0043] In this embodiment, a transmission connection part 13 is provided on the side surface of the fixture body 1, and a plurality of limiting grooves 4 are evenly distributed along the circumference of the fixture body 1 in a plurality of circles.

[0044] Figure 6 andFigure 7 The second embodiment of the fixture for realizing double-sided grinding of blades according to the present invention is shown. This embodiment is basically the same as the first embodiment, with the only difference being that in this embodiment, the positioning pin 2 and the positioning ring 3 are set as an integral structure, and arc-shaped transition surfaces 24 are provided at the joints between the left limiting column 21 and the positioning ring 3 and between the right limiting column 23 and the positioning ring 3.

[0045] The usage method of the fixture for realizing double-sided grinding of blades according to the present invention, which adopts the above-mentioned fixture for realizing double-sided grinding of blades, includes the following steps:

[0046] S1. Horizontally place the lower surface 12 of the fixture body 1 downward on the working table of the double-sided grinding machine;

[0047] S2. Place the bottom surface of the first blade to be ground 51 downward in the limiting groove 4;

[0048] S3. After installing the positioning ring 3 in place on the positioning pin 2, place it in the limiting groove 4, and make the left limiting column 21 placed in the inner hole of the blade of the first blade to be ground 51;

[0049] S4. Place the bottom surface of the second blade to be ground 52 upward in the limiting groove 4, and make the right limiting column 23 placed in the inner hole of the blade of the second blade to be ground 52;

[0050] S5. Repeat the above steps S2 to S4 until all the blades to be ground are installed on the fixture body 1.

[0051] After the installation is completed, the structure of the blade to be ground is as Figure 8 shown. Install the fixture for realizing double-sided grinding of blades on the surface grinding machine, and start the surface grinding machine to simultaneously grind the bottom surfaces of all the blades to be ground on the side of the second blade to be ground 52 and the bottom surfaces of all the blades to be ground on the side of the first blade to be ground 51. Moreover, neither end will affect the tips of the blades to be ground, improving the product qualification rate. One installation can simultaneously realize the grinding of the two end faces of the blades to be ground on both sides, greatly improving the production efficiency.

[0052] In this embodiment, after completing step S4, the distance between the bottom surface of the second blade to be ground 52 and the upper surface 11 of the fixture body 1 is 0.5 mm - 2 mm, ensuring that the height of the bottom surface of the blade to be ground protruding from the surface of the fixture body 1 meets a certain grinding allowance thickness.

[0053] Although the present invention has been disclosed above in its preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into equivalent embodiments with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A fixture capable of realizing double-end grinding of blades, characterized in that: It includes a fixture body (1), a positioning pin (2) and a positioning ring (3). The upper surface (11) and the lower surface (12) of the fixture body (1) are parallel to each other. A plurality of limiting grooves (4) penetrating through the upper surface (11) and the lower surface (12) are formed on the fixture body (1). The positioning pin (2) includes a left limiting column (21), a positioning table (22) and a right limiting column (23) arranged in sequence. The positioning ring (3) is sleeved on the positioning table (22) of the positioning pin (2). The left side surface (31) of the positioning ring (3) and the left limiting column (21) form a positioning area for the first blade to be ground (51). The right side surface (32) of the positioning ring (3) and the right limiting column (23) form a positioning area for the second blade to be ground (52). During operation, the first blade to be ground (51) and the second blade to be ground (52) are both loaded into their positioning areas. The first blade to be ground (51), the second blade to be ground (52), the positioning ring (3) and the positioning pin (2) form an integral body and are accommodated in the limiting groove (4). During operation, the first blade to be ground (51) and the second blade to be ground (52) are both loaded into their positioning areas. The first screw hole plane (511) of the first blade to be ground (51) cooperates with the left side surface (31) of the positioning ring (3). The second screw hole plane (521) of the second blade to be ground (52) cooperates with the right side surface (32) of the positioning ring (3). And the distance between the bottom surface of the first blade to be ground (51) and the bottom surface of the second blade to be ground (52) is L. The distance between the upper surface (11) and the lower surface (12) of the fixture body (1) is L1. The length of the positioning pin (2) is L2. It should satisfy: 0.5 mm ≤ L - L1 ≤ 2 mm, L1 < L2 < L.

2. The fixture capable of realizing double-end grinding of the blade according to claim 1, characterized in that: The left side surface (31) of the positioning ring (3) includes a left positioning end face (311) in the middle and a left clearance cone surface (312) on the periphery. The right side surface (32) of the positioning ring (3) includes a right positioning end face (321) in the middle and a right clearance cone surface (322) on the periphery. During operation, the limiting outer circle (33) of the positioning ring (3) is in contact and cooperation with the limiting groove (4). The upper surface of the first blade to be ground (51) cooperates with the left positioning end face (311). The upper surface of the second blade to be ground (52) cooperates with the right positioning end face (321).

3. The fixture capable of realizing double-end grinding of the blade according to claim 2, wherein: Both the left positioning end face (311) and the right positioning end face (321) are annular, and the major diameter and the minor diameter are D1 and D2 respectively. Both the first screw hole plane (511) and the second screw hole plane (521) are annular, and the major diameter and the minor diameter are D3 and D4 respectively. It should satisfy: D1 > D3 > D4 > D2.

4. The fixture capable of realizing double-end grinding of the blade according to claim 2, wherein: The diameters of the left limiting column (21) and the right limiting column (23) are D5. The inner hole diameters of the first blade to be ground (51) and the second blade to be ground (52) are D6. It should satisfy: 0.01 mm ≤ D6 - D5 ≤ 0.1 mm.

5. The fixture capable of realizing double-sided grinding of the blade according to any one of claims 1 to 4, characterized in that: A transmission connection part (13) is provided on the side surface of the fixture body (1), and a plurality of the limiting grooves (4) are uniformly distributed along the circumferential direction of the fixture body (1) in a plurality of circular shapes.

6. The fixture capable of realizing double-end grinding of the blade according to claim 1 or 2, characterized in that: The positioning pin (2) and the positioning ring (3) are arranged as an integral structure.

7. The fixture capable of realizing double-end grinding of the blade according to claim 6, wherein: Arc-shaped transition surfaces (24) are provided at the joints of the left limiting post (21) and the positioning ring (3) and at the joints of the right limiting post (23) and the positioning ring (3).

8. A method of using a fixture capable of realizing double-sided grinding of a blade, which uses the fixture capable of realizing double-sided grinding of a blade according to any one of claims 1 to 7 above, characterized in that, It includes the following steps: S1. Horizontally place the lower surface (12) of the fixture body (1) downward on the workbench of the double-end surface grinder; S2. Place the bottom surface of the first blade to be ground (51) downward in the limiting groove (4); S3. After installing the positioning ring (3) in place on the positioning pin (2), place it in the limiting groove (4), and make the left limiting post (21) placed in the inner hole of the blade of the first blade to be ground (51); S4. Place the bottom surface of the second blade to be ground (52) upward in the limiting groove (4), and make the right limiting post (23) placed in the inner hole of the blade of the second blade to be ground (52); S5. Repeat the above steps S2 to S4 until all the blades to be ground are installed on the fixture body (1).

9. The method of using the fixture capable of realizing double-end grinding of blades according to claim 8, characterized in that: After completing the step S4, the distance that the bottom surface of the second blade to be ground (52) is higher than the upper surface (11) of the fixture body (1) is 0.5 mm - 2 mm.

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