Grooving insert grinding jig

Abstract

This invention discloses a grooving insert grinding fixture, comprising a base, a positioning plate, a clamping plate, and a pressure plate. The positioning plate is fixedly installed on the base and mates with the base to form a receiving cavity for the grooving insert. The clamping plate includes a clamping conical surface, a clamping bottom surface, a pin hole, and two clamping surfaces. The pressure plate includes a mounting part and a working part. The mounting part is used to install the pressure plate on a machine tool clamping mechanism so that the machine tool clamping mechanism can drive the pressure plate to rotate and clamp the clamping plate. The working part has a conical surface, a supporting plane, and a pin. The pin is located on the supporting plane and is coaxial with the conical surface. The clamping plate is positioned between the side positioning surface of the grooving insert and the pressure plate. The clamping bottom surface is placed on the supporting plane. The clamping conical surface mates with the conical surface, and the pin hole and pin are in clearance fit. When the pressure plate rotates and drives the clamping plate to clamp the grooving insert, the clamping plate can rotate around the axis of the clamping conical surface so that the two clamping surfaces respectively abut against the front and rear ends of the side positioning surface of the grooving insert. It has the advantages of stable and reliable positioning and low manufacturing difficulty.

Description

Technical Field

[0001] This invention relates to the field of metal cutting tool processing, and more particularly to a grooving insert grinding fixture. Background Technology

[0002] The grooving face of the cutting edge of the insert is grooved, which greatly improves the sharpness and quality of the cutting edge. However, due to the thin and long structure of the grooving insert, which is wide at both ends and narrow in the middle, the classic fixture method of "base + positioning plate + pressure plate" is used in grooving on both CNC grinding machines and traditional grinding machines. Existing automated grooving CNC machine tools use traditional swing-arm clamping fixtures. In order to avoid space for the cutting edge and the robot arm, two positioning bosses are formed on the upper part of the base, isolating three clearance spaces. When the swing-arm pressure plate uses one clamping point and acts on the middle of the two positioning bosses, it can position and clamp the grooving insert, but the grooving insert is easily crushed by the pressure plate. When the swing-arm pressure plate uses two clamping points and acts on the two positioning bosses respectively, it can avoid the grooving insert being crushed by the pressure plate, but it is difficult for the two clamping points of the swing-arm pressure plate to act on the grooving insert at the same time, so it cannot form an effective positioning and clamping. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a slotted cutting tool grinding fixture that is stable and reliable in positioning and easy to manufacture.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A grooving insert grinding fixture includes a base, a positioning plate, a clamping plate, and a pressure plate. The positioning plate is fixedly installed on the base and cooperates with the base to form a receiving cavity for the grooving insert. The clamping plate includes a clamping conical surface, a clamping bottom surface, a pin hole, and two clamping surfaces. The pressure plate includes a mounting part and a working part. The mounting part is used to install the pressure plate on a machine tool clamping mechanism so that the machine tool clamping mechanism can drive the pressure plate to rotate and clamp the clamping plate. The working part has a conical surface, a supporting plane, and a pin. The pin is located on the supporting plane and is coaxial with the conical surface. The clamping plate is disposed between the side positioning surface of the grooving insert and the pressure plate. The clamping bottom surface is placed on the supporting plane. The clamping conical surface mates with the conical surface. The pin hole and the pin are in clearance fit. When the pressure plate rotates and drives the clamping plate to clamp the grooving insert, the clamping plate can rotate around the axis of the clamping conical surface so that the two clamping surfaces respectively abut against the front and rear ends of the side positioning surface of the grooving insert.

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

[0007] The working part includes a limiting platform and two limiting surfaces. The conical surface is provided on the side wall of the limiting platform, and the two limiting surfaces are respectively provided on both sides of the conical surface.

[0008] The cone angle of the cone surface is α, and the central angle of the arc is A, which should satisfy: 2°<α≤425°, 60°≤A≤90°.

[0009] A process clearance surface is provided between the conical surface and the supporting plane. The height of the conical surface is L2, and the effective height between the conical surface and the supporting plane is L3, where L3 < L2.

[0010] The cone angle of the clamping cone is γ, the radius of the arc of the clamping cone is R2, and the radius of the arc of the cone is R1. It should satisfy: γ=α, R1=R2.

[0011] The clamping plate has a width of L4 and a thickness of L5, and the arc chord length of the conical surface is L1. The following conditions should be met: L4 = L1, L5 = L3.

[0012] The two limiting surfaces are symmetrically distributed and have an included angle β between them, which should satisfy: 5°≤β≤30°. The height of the limiting surface is L6, which should satisfy: 0.2L3≤L6≤0.33L3.

[0013] The diameter of the pin hole is D, and the diameter of the pin post is d, which should satisfy: L6*Tanα<0.5*(Dd)<(L3-L4)*Tanα.

[0014] A clamping clearance surface is provided between the two clamping surfaces.

[0015] The base is provided with a positioning plate support surface, a blade positioning boss and a clearance surface. The positioning plate is provided with a waist-shaped hole and a blade positioning surface. A standard screw passes through the waist-shaped hole to install the positioning plate on the positioning plate support surface. The blade positioning boss, the blade positioning surface and the two clamping surfaces together clamp the slotted blade.

[0016] Compared with the prior art, the advantages of the present invention are as follows:

[0017] The grooving insert grinding fixture of the present invention is provided with a pressure plate and a clamping plate. It utilizes the fit between the conical surface and the shaft hole, and combined with the positional relationship between the conical surface and the pin hole, the clamping plate is reliably connected to the pressure plate and can rotate a certain angle in the pressure plate. When the pressure plate is pressed, the two clamping surfaces of the clamping plate can automatically act on the side of the grooving insert, that is, the two clamping surfaces can simultaneously abut against the front and rear ends of the side positioning surface of the grooving insert, thereby forming a stable and reliable positioning clamp for the grooving insert. Moreover, the pressure plate and clamping plate have a simple structure and are easy to manufacture. Attached Figure Description

[0018] Figure 1This is a perspective view of the first embodiment of the slotted blade grinding fixture of the present invention.

[0019] Figure 2 This is a front view of the base in the first embodiment of the slotted blade grinding fixture of the present invention.

[0020] Figure 3 This is a side view of the base in the first embodiment of the slotted blade grinding fixture of the present invention.

[0021] Figure 4 This is a front view of the positioning plate in the first embodiment of the slotted blade grinding fixture of the present invention.

[0022] Figure 5 This is a top view of the pressure plate in the first embodiment of the slotted blade grinding fixture of the present invention.

[0023] Figure 6 Figure 5 MM view.

[0024] Figure 7 This is a top view of the clamping plate in the first embodiment of the slotted blade grinding fixture of the present invention.

[0025] Figure 8 yes Figure 7 NN view.

[0026] Figure 9 This is a schematic diagram of a grooving blade.

[0027] Figure 10 This is a top view of the pressure plate in the second embodiment of the slotted blade grinding fixture of the present invention.

[0028] Figure 11 yes Figure 10 The PP view.

[0029] Figure 12 This is a front view of the clamping plate in the second embodiment of the slotted blade grinding fixture of the present invention.

[0030] Figure 13 This is a top view of the clamping plate in the second embodiment of the slotted blade grinding fixture of the present invention.

[0031] Figure 14 yes Figure 13 QQ View.

[0032] The labels in the diagram represent:

[0033] 1. Base; 11. Positioning plate support surface; 12. Blade positioning boss; 13. Clearance surface; 2. Positioning plate; 21. Waist-shaped hole; 22. Blade positioning surface; 3. Clamping plate; 31. Clamping conical surface; 32. Clamping bottom surface; 33. Pin hole; 34. Clamping surface; 35. Clamping clearance surface; 4. Pressure plate; 41. Mounting part; 42. Working part; 421. Conical surface; 422. Support plane; 423. Pin; 424. Limiting platform; 425. Limiting surface; 426. Process clearance surface; 9. Grooved blade. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "horizontal", "inner", "outer", "top", "bottom", etc., which indicate orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0036] Figures 1 to 9This invention illustrates a first embodiment of a grooving insert grinding fixture, which includes a base 1, a positioning plate 2, a clamping plate 3, and a pressure plate 4. The positioning plate 2 is fixedly mounted on the base 1 and cooperates with the base 1 to form a receiving cavity for the grooving insert 9. The clamping plate 3 includes a clamping conical surface 31, a clamping bottom surface 32, a pin hole 33, and two clamping surfaces 34. The pressure plate 4 includes a mounting part 41 and a working part 42. The mounting part 41 is used to mount the pressure plate 4 to a machine tool clamping mechanism so that the machine tool clamping mechanism can carry... The movable pressure plate 4 rotates to clamp the clamping plate 3. The working part 42 is provided with a conical surface 421, a supporting plane 422, and a pin 423. The pin 423 is located on the supporting plane 422 and is coaxial with the conical surface 421. The clamping plate 3 is located between the side positioning surface of the slotted blade 9 and the pressure plate 4. The clamping bottom surface 32 is placed on the supporting plane 422. The clamping conical surface 31 mates with the conical surface 421. The pin hole 33 is clearance-fitted with the pin 423. When the pressure plate 4 rotates and drives the clamping plate 3 to clamp the slotted blade 9, the clamping plate 3 can... Rotating around the axis of the clamping conical surface 31 allows the two clamping surfaces 34 to abut against the front and rear ends of the side positioning surface of the slotted blade 9, respectively. Utilizing the conical surface fit between the clamping conical surface 31 and the conical surface 421, and the shaft hole fit between the pin hole 33 and the pin 423, combined with the positional relationship between the conical surface and the pin hole, the clamping plate 3 is reliably connected to the pressure plate 4 and can rotate a certain angle within the pressure plate 4. When the pressure plate 4 is pressed, the two clamping surfaces 34 of the clamping plate 3 can automatically act on the side of the slotted blade 9, i.e., the two clamping surfaces... 34 can simultaneously abut against the front and rear ends of the side positioning surface of the grooving insert, thereby forming a stable and reliable positioning clamp for the grooving insert 9. When the clamping plate 3 clamps the grooving insert 9, the reaction force of the grooving insert 9 on the clamping plate 3 is balanced by the horizontal component of the cone surface 421 of the pressure plate 4, and the cone surface 421 generates a vertical downward component force, ensuring that the clamping plate 3 is balanced in force within the pressure plate 4, and that its state is stable and reliable. Moreover, the pressure plate 4 and the clamping plate 3 have simple structures and low processing difficulty, reducing the cost of using the grooving insert grinding fixture.

[0037] In this embodiment, the working part 42 includes a limiting platform 424 and two limiting surfaces 425. A conical surface 421 is provided on the side wall of the limiting platform 424, and two limiting surfaces 425 are respectively provided on both sides of the conical surface 421. The rotation angle of the clamping plate 3 is limited by the two limiting surfaces 425, thereby improving the stability of the clamping plate 3 in clamping the slotted blade 9.

[0038] In this embodiment, the cone angle of the cone surface 421 is α and the central angle of the arc is A, which should satisfy: 2°<α≤425°, 60°≤A≤90°, thereby ensuring that the clamping piece 3 can be smoothly installed into the working part 42 of the pressure plate 4 during installation, and ensuring the arc length of the clamping cone surface 31 and the cone surface 421, improving the support stability of the pressure plate 4 on the clamping piece 3, ensuring that the clamping bottom surface 32 is in close contact with the support plane 422 during operation, and ensuring that the cone surface mating structure has sufficient strength. Specifically, in this embodiment, α=10°, A=85°.

[0039] In this embodiment, a process clearance surface 426 is provided between the conical surface 421 and the supporting plane 422, such as... Figure 6 As shown: the height of the conical surface 421 is L2, and the effective height between the conical surface 421 and the supporting plane 422 is L3, and L3 < L2, thereby ensuring that the conical surface 421 is a complete conical surface above the supporting plane 422 and ensuring the contact area between the clamping conical surface 31 and the conical surface 421, thus improving the stability of clamping the slotted blade 9. Specifically, in this embodiment, L2 = 3.5mm and L3 = 3mm.

[0040] In this embodiment, the cone angle of the clamping cone 31 is γ, the radius of the arc of the clamping cone 31 is R2, and the radius of the arc of the cone 421 is R1. The following conditions should be met: γ = α, R1 = R2, so as to ensure the stability of the fit between the clamping cone 31 and the cone 421.

[0041] In this embodiment, the clamping plate 3 has a width of L4 and a thickness of L5, and the arc chord length of the conical surface 421 is L1. It should satisfy: L4 = L1, L5 = L3, so as to ensure that the mating area between the clamping conical surface 31 and the conical surface 421 is larger. Specifically, in this embodiment, L1 = L4 = 4.2mm, L5 = 3mm.

[0042] In this embodiment, the two limiting surfaces 425 are symmetrically distributed and have an included angle β between them, which should satisfy: 5°≤β≤30°. Then the rotation angle range of the clamping plate 3 is 2β. In this embodiment, β=10° and the rotation angle range of the clamping plate 3 is 20°. The height of the limiting surface 425 is L6, which should satisfy: 0.2L3≤L6≤0.33L3. Specifically, L6=0.5mm.

[0043] In this embodiment, the diameter of the pin hole 33 is D, and the diameter of the pin post 423 is d. It should satisfy: L6*Tanα<0.5*(Dd)<(L3-L6)*Tanα, so as to ensure that when clamping the slotted blade 9, the clamping cone surface 31 and the cone surface 421 are in surface contact rather than line contact. Specifically, in this embodiment, D=2.5mm, d=2.3mm.

[0044] In this embodiment, a clamping clearance surface 35 is provided between the two clamping surfaces 34. The clamping clearance surface 35 ensures the space for the robot to hold the slotted blade 9 and can also prevent unevenness of the side positioning surface of the slotted blade 9.

[0045] In this embodiment, the base 1 is provided with a positioning plate support surface 11, a blade positioning boss 12 and a clearance surface 13. The positioning plate 2 is provided with a waist-shaped hole 21 and a blade positioning surface 22. A standard screw passes through the waist-shaped hole 21 to install the positioning plate 2 on the positioning plate support surface 11. The blade positioning boss 12, the blade positioning surface 22 and the two clamping surfaces 34 together clamp the slotted blade 9.

[0046] Figures 10 to 14 A second embodiment of the slotted insert grinding fixture of the present invention is shown. The difference between this embodiment and the first embodiment is that in this embodiment, the limiting surface 425 of the pressure plate 4 forms an angle θ with the supporting plane 422, and 60°≤θ<90°. The clamping bottom surface of the clamping plate 3 forms an angle Φ with the clamping side surface, Φ=θ. This ensures that when the clamping plate 3 is in the extreme rotation position in the working part 42 of the pressure plate 4, both the clamping cone surface 31 and the clamping side surface of the clamping plate 3 are subject to the downward limiting effect of the pressure plate 4. The clamping surface 34 and the clamping clearance surface 35 of the clamping plate 3 are both curved surfaces. The second embodiment can satisfy the functional requirements of the present invention. The only difference is in the manufacturing process. The rest are the same and will not be described in detail.

[0047] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A grooving insert grinding fixture, characterized in that: The machine tool clamping mechanism includes a base (1), a positioning plate (2), a clamping plate (3), and a pressure plate (4). The positioning plate (2) is fixedly installed on the base (1) and cooperates with the base (1) to form a cavity for receiving the slotted blade (9). The clamping plate (3) includes a clamping conical surface (31), a clamping bottom surface (32), a pin hole (33), and two clamping surfaces (34). The pressure plate (4) includes a mounting part (41) and a working part (42). The mounting part (41) is used to install the pressure plate (4) on the machine tool clamping mechanism so that the machine tool clamping mechanism can drive the pressure plate (4). The clamping plate (3) is rotated and pressed. The working part (42) is provided with a conical surface (421), a supporting plane (422), and a pin (423). The working part (42) includes a limiting platform (424) and two limiting surfaces (425). The conical surface (421) is provided on the side wall of the limiting platform (424), and the two limiting surfaces (425) are respectively provided on both sides of the conical surface (421). The pin (423) is provided on the supporting plane (422) and is coaxial with the conical surface (421). The clamping plate (3) is provided on the slotted blade (9). Between the side positioning surface and the pressure plate (4), the clamping bottom surface (32) is placed on the support plane (422), the clamping cone surface (31) is engaged with the cone surface (421), the pin hole (33) is clearance engaged with the pin (423), when the pressure plate (4) rotates and drives the clamping plate (3) to clamp the slotted blade (9), the clamping plate (3) can rotate around the axis of the clamping cone surface (31) so that the two clamping surfaces (34) respectively abut against the front and rear ends of the side positioning surface of the slotted blade (9), the cone surface (421) and the support A process clearance surface (426) is provided between the supporting plane (422). The height of the conical surface (421) is L2. The effective height between the conical surface (421) and the supporting plane (422) is L3, and L3 < L2. The two limiting surfaces (425) are symmetrically distributed and have an included angle β between them, which should satisfy: 5° ≤ β ≤ 30°. The height of the limiting surface (425) is L6, which should satisfy: 0.2L3 ≤ L6 ≤ 0.33L3. The diameter of the pin hole (33) is D, and the diameter of the pin (423) is d, which should satisfy: L6 * Tanα < 0.5 * (Dd) < (L3 - L6) * Tanα, where α is the cone angle of the conical surface (421).

2. The grooving tool grinding fixture according to claim 1, characterized in that: The central angle of the arc of the cone surface (421) is A, which should satisfy: 60°≤A≤90°.

3. The slotting insert grinding fixture according to claim 1 or 2, characterized in that: The cone angle of the clamping cone (31) is γ, the radius of the arc of the clamping cone (31) is R2, and the radius of the arc of the cone (421) is R1. It should satisfy: γ=α, R1=R2.

4. The grooving insert grinding fixture according to claim 1 or 2, characterized in that: The clamping piece (3) has a width of L4 and a thickness of L5. The arc chord length of the conical surface (421) is L1, and it should satisfy: L4=L1, L5=L3.

5. The grooving tool grinding fixture according to claim 1 or 2, characterized in that: A clamping clearance surface (35) is provided between the two clamping surfaces (34).

6. The grooving tool grinding fixture according to claim 1 or 2, characterized in that: The base (1) is provided with a positioning plate support surface (11), a blade positioning boss (12) and a clearance surface (13). The positioning plate (2) is provided with a waist-shaped hole (21) and a blade positioning surface (22). A standard screw passes through the waist-shaped hole (21) to install the positioning plate (2) on the positioning plate support surface (11). The blade positioning boss (12), the blade positioning surface (22) and the two clamping surfaces (34) together clamp the slotted blade (9).

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