Negative chamfering machining device of PCD forming tool

Abstract

The utility model discloses a negative chamfering processing device of a PCD (Poly Crystal Diamond) forming cutter, which comprises a processing main body and a limiting resisting piece which is detachably arranged on the processing main body, the angle block is detachably arranged on the machining main body, the angle block and the limiting resisting piece are oppositely arranged in a staggered mode, and a machining gap is formed between the angle block and the limiting resisting piece; the conversion block is placed on the angle block in a sliding mode, and a cutter is detachably arranged on the conversion block; the front cutter surface of the cutter is parallel to the bottom surface of the conversion block; the grinding wheel is arranged below the machining body, and the grinding face of the grinding wheel is located below the machining gap. The machining gap formed by the limiting stopping piece and the angle block is enlarged, the tool is clamped and polished through the conversion block, and precise positioning of the polishing grinding wheel is matched, so that the tool forms a complete negative chamfering forming track in the sliding process of the conversion block, and the fundamental defect that negative chamfering forming cannot be achieved through a traditional narrow gap is overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, in particular to a negative chamfer machining device for a PCD forming tool. Background Art

[0002] As Figure 1 shown, the negative chamfer of a tool is a negative rake face ground at the tool edge with a width of about 0.1 - 0.2 mm, so as to increase the tool wedge angle to improve the tool strength, and at the same time change the heat dissipation conditions, which can improve the tool durability on the basis of strengthening the cutting edge while increasing the cutting force not much. The method of grinding negative chamfers is adopted on many cemented carbide tools, ceramic tools, PCBN tools and various clamped inserts to increase the cutting edge strength.

[0003] In the machining of polycrystalline diamond (PCD) forming tools, the traditional process generally adopts the operation mode of manually holding the tool. The operator directly holds the tool and makes the surface to be polished of the tool contact with a high-speed rotating grinding wheel for grinding. Due to the lack of a special positioning device, during traditional machining, only a narrow gap (usually < 3 mm) formed by a simple stop piece and an angle block is relied on for positioning. This gap space can neither accommodate the forming track of the tool negative chamfer structure nor realize the precise feed control of the tool during the grinding process, and finally the grinding requirement of the negative chamfer cannot be achieved. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the problem that the existing grinding mechanism cannot realize the negative chamfer grinding of polycrystalline diamond (PCD) forming tools, and provide a negative chamfer machining device for PCD forming tools.

[0005] A negative chamfer machining device for a PCD forming tool comprises

[0006] a machining main body,

[0007] a limit stop piece detachably arranged on the machining main body;

[0008] an angle block detachably arranged on the machining main body, arranged in a staggered manner opposite to the limit stop piece, and forming a machining gap with the limit stop piece;

[0009] a conversion block slidably placed on the angle block, with a tool detachably arranged on the conversion block; the rake face of the tool is parallel to the bottom surface of the conversion block;

[0010] a grinding wheel arranged below the machining main body, and the grinding surface of the grinding wheel is located below the machining gap.

[0011] Further, an installation groove is provided on the conversion block, and a first installation threaded hole is provided at the rear side of the installation groove; the tool includes a tool installation part, and a second installation threaded hole is provided on the tool installation part; the first installation threaded hole coincides with the second installation threaded hole and is fixed by a fastening bolt; an extension part is integrally provided on one side of the tool installation part, and a grinding part is welded at the bottom of the extension part.

[0012] Further, an arc-shaped notch is also provided on the other side of the installation groove.

[0013] Further, the processing main body includes a first installation part connected integrally, a connection part vertically provided on the first installation part, and a second installation part fixedly connected to the end of the connection part; the first installation part and the second installation part are arranged in parallel; the limit resisting part is connected to the front end of the first installation part through a bolt group; the angle block is connected to the front end of the second installation part through a bolt group.

[0014] Further, the limit resisting part includes a first flat part, and a first inclined part is provided on one side of the first flat part; a first threaded hole group is provided on the first flat part; the front grinding surface of the tool contacts the end surface of the first inclined part.

[0015] Further, the angle block includes a fixed installation part, and a second threaded hole group is provided on the fixed installation part; a second flat part is provided on one side of the fixed installation part, and a second inclined part is provided on the other side of the second flat part; the conversion block is placed on the second inclined part, so that the bottom surface of the conversion block contacts the surface of the second inclined part.

[0016] The beneficial effects of the present utility model are as follows: by expanding the processing gap formed by the limit resisting part and the angle block, and clamping and grinding the tool through the conversion block, and cooperating with the precise positioning of the grinding wheel, a complete forming track of the negative chamfer is formed during the sliding process of the tool on the conversion block, solving the fundamental defect that the negative chamfer forming cannot be realized in the traditional narrow gap. At the same time, by setting the limit resisting part and the angle block to be detachable, and cooperating with the installation groove and the arc-shaped notch on the conversion block, the rapid replacement of PCD tools with different sizes is realized, increasing the application range of the device. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of a negative chamfer;

[0018] Figure 2 It is a schematic structural diagram of the whole device;

[0019] Figure 3 It is a schematic front structural diagram of the device;

[0020] Figure 4 It is a schematic structural diagram of the positions of the limit resisting part and the angle block;

[0021] Figure 5 Schematic diagram of the conversion block structure;

[0022] Figure 6 Schematic diagram of the negative chamfer structure of the tool;

[0023] In the figure, 1 is the processing main body, 11 is the first installation part, 12 is the connecting part, 13 is the second installation part, 101 is the processing gap, 2 is the limiting and resisting part, 20 is the first threaded hole group, 21 is the first flat part, 22 is the first inclined part, 3 is the angle block, 30 is the second threaded hole group, 31 is the fixed installation part, 32 is the second flat part, 33 is the second inclined part, 4 is the conversion block, 41 is the installation groove, 42 is the arc-shaped notch, 43 is the first installation threaded hole, 5 is the tool, 51 is the tool installation part, 52 is the extension part, 53 is the second installation threaded hole, 6 is the grinding wheel, 60 is the fastening bolt, 7 is the grinding part, and 71 is the negative chamfer. Detailed implementation mode

[0024] The following uses specific specific examples to illustrate the implementation mode of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0025] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0026] Embodiment

[0027] As Figures 2 - 6 shown, a negative chamfer processing device for a PCD forming tool includes a processing main body 1. Specifically, the processing main body 1 is set as a frame structure, and a support system is composed of a first installation part 11, a connecting part 12, and a second installation part 13; among them, the first installation part 11, the connecting part 12 vertically arranged on the first installation part 11, and the second installation part 13 fixedly connected to the end of the connecting part 12 are an integral structure; the first installation part 11 and the second installation part 13 are arranged in parallel; the limiting and resisting part 2 is connected to the front end of the first installation part 11 through a bolt group; the angle block 3 is connected to the front end of the second installation part 13 through a bolt group.

[0028] The limit and resistance member 2 is detachably arranged on the processing main body 1; the limit and resistance member 2 includes a first flat portion 21, and a first inclined portion 22 is arranged on one side of the first flat portion 21; a first threaded hole group 20 is arranged on the first flat portion 21; the front grinding surface of the cutter 5 contacts the end surface of the first inclined portion 22. During use, the back surface of the first inclined portion 22 is used to control the grinding position of the grinding wheel 6, and the side end surface of the first inclined portion 22 abuts against the extension portion 52, so that the grinding portion 7 extends out of the processing gap 101 and is ground by the grinding wheel 6.

[0029] The angle block 3 is detachably arranged on the processing main body 1, is arranged in a staggered manner opposite to the limit and resistance member 2, and forms a processing gap 101 with the limit and resistance member 2; specifically, the angle block 3 includes a fixed installation portion 31, and a second threaded hole group 30 is arranged on the fixed installation portion 31; a second flat portion 32 is arranged on one side of the fixed installation portion 31, and a second inclined portion 33 is arranged on the other side of the second flat portion 32; the conversion block 4 is placed on the second inclined portion 33, so that the bottom surface of the conversion block 4 contacts the surface of the second inclined portion 33. During use, the bottom surface of the conversion block 4 coincides with the inclined surface of the second inclined portion 33, ensuring the grinding angle of the grinding portion 7.

[0030] The conversion block 4 is slidably placed on the angle block 3, and the cutter 5 is detachably arranged on the conversion block 4; the front cutting surface of the cutter 5 is parallel to the bottom surface of the conversion block 4; an installation groove 41 is arranged on the conversion block 4, and a first installation threaded hole 43 is arranged at the rear side of the installation groove 41; the cutter 5 includes a cutter installation portion 51, and a second installation threaded hole 53 is arranged on the cutter installation portion 51; the first installation threaded hole 43 coincides with the second installation threaded hole 53 and is fixed by a fastening bolt 60; an extension portion 52 is integrally arranged on one side of the cutter installation portion 51, and a grinding portion 7 is welded at the bottom of the extension portion 52. An arc-shaped notch 42 is further arranged on the other side of the installation groove 41.

[0031] The grinding wheel 6 is arranged below the processing main body 1, and the grinding surface of the grinding wheel 6 is located below the processing gap 101. In this solution, the grinding wheel 6 at least includes driving components such as a motor. Since the innovation point of this solution lies in the entire auxiliary structure, the grinding wheel 6 is an existing technology and will not be elaborated here too much.

[0032] The usage method of this device: weld the grinding portion 7 at the bottom of the extension portion 52, and fix the entire cutter 5 on the conversion block 4 through the fastening bolt 60, so that the front cutting surface of the cutter 5 is parallel to the bottom surface of the conversion block 4;

[0033] Select an angle block 3 corresponding to the inclination angle, fixedly install it at the front end of the second installation part 13, manually hold the conversion block 4, and place it on the surface of the second inclined part 33, so that the bottom surface of the conversion block 4 coincides with the supporting surface of the angle block 3. Control the grinding part 7 of the tool 5 to extend out of the processing gap 101 between the limit resisting part 2 and the angle block 3, and the end surface of the extension part 52 of the tool 5 abuts against the limit resisting part 2. Manually rotate the conversion block 4 to realize the negative chamfer 71 grinding of the grinding part 7.

[0034] In this solution, by adjusting the distance between the limit resisting part 2 and the angle block 3, the extension amount of the grinding part 7 is further controlled;

[0035] By adjusting the distance between the grinding wheel 6 and the limit resisting part 2, the width of the chamfer is controlled.

[0036] When performing chamfers at different angles, only need to replace the corresponding angle block 3.

[0037] The above-described embodiments only represent the specific implementation manners of the present invention, and the description is relatively specific and detailed, but it cannot be thus understood as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A negative chamfer machining device for a PCD forming tool, characterized in that: Comprising: A processing main body (1), A limiting and resisting member (2), detachably arranged on the processing main body (1); An angle block (3), detachably arranged on the processing main body (1), arranged staggeredly opposite to the limiting and resisting member (2), and forming a processing gap (101) with the limiting and resisting member (2); A conversion block (4), slidably placed on the angle block (3), and a tool (5) is detachably arranged on the conversion block (4); the rake face of the tool (5) is parallel to the bottom surface of the conversion block (4); A grinding wheel (6), arranged below the processing main body (1), and the grinding surface of the grinding wheel (6) is located below the processing gap (101).

2. The negative chamfer machining device for a PCD forming tool according to claim 1, characterized in that: An installation groove (41) is arranged on the conversion block (4), and a first installation threaded hole (43) is arranged at the rear side of the installation groove (41); the tool (5) includes a tool installation portion (51), and a second installation threaded hole (53) is arranged on the tool installation portion (51); the first installation threaded hole (43) coincides with the second installation threaded hole (53) and is fixed by a fastening bolt (60); an extension portion (52) is integrally arranged on one side of the tool installation portion (51), and a grinding portion (7) is welded at the bottom of the extension portion (52).

3. The negative chamfer machining device for a PCD forming tool according to claim 2, characterized in that: An arc-shaped notch (42) is further arranged on the other side of the installation groove (41).

4. A chamfer machining device for a negative chamfer of a PCD formed tool according to claim 1, characterized in that: The processing main body (1) includes an integrally connected first installation portion (11), a connecting portion (12) vertically arranged on the first installation portion (11), and a second installation portion (13) fixedly connected to the end of the connecting portion (12); the first installation portion (11) and the second installation portion (13) are arranged in parallel; the limiting and resisting member (2) is connected to the front end of the first installation portion (11) through a bolt group; the angle block (3) is connected to the front end of the second installation portion (13) through a bolt group.

5. The negative chamfer machining device for a PCD forming tool according to claim 1, characterized in that: The limiting and resisting member (2) includes a first flat portion (21), and a first inclined portion (22) is arranged on one side of the first flat portion (21); a first threaded hole group (20) is arranged on the first flat portion (21); the front-end grinding surface of the tool (5) contacts the end surface of the first inclined portion (22).

6. The negative chamfer machining device for a PCD forming tool according to claim 1, characterized in that: The angle block (3) includes a fixed installation portion (31), and a second threaded hole group (30) is arranged on the fixed installation portion (31); a second flat portion (32) is arranged on one side of the fixed installation portion (31), and a second inclined portion (33) is arranged on the other side of the second flat portion (32); the conversion block (4) is placed on the second inclined portion (33) such that the bottom surface of the conversion block (4) contacts the surface of the second inclined portion (33).

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