Hard alloy cutter fine grinding tooling

Abstract

The utility model relates to the technical field of cutter production, provide a kind of hard alloy cutter fine grinding tool, including bottom plate, the bottom plate is provided with polishing part, the bottom plate is provided with clamping assembly, the clamping assembly is used to clamp workpiece to be processed;The polishing part includes installation part and polishing part, one end of the installation part is fixedly connected with one end of polishing part, one side of the polishing part is set as cambered surface, the projection of the cambered surface is towards the recess of workpiece to be processed and is set;The end of the installation part away from polishing part is provided with sliding portion, the sliding portion is slidably arranged on the bottom plate along the length direction of bottom plate, the length direction of the polishing part is parallelly arranged with the length direction of bottom plate, the utility model can improve the processing effect of double-end hard alloy cutter bottom burr.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool manufacturing technology, and more specifically, to a precision grinding fixture for cemented carbide cutting tools. Background Technology

[0002] The content in this section only provides background information related to this utility model and may not constitute prior art.

[0003] Carbide inserts are replaceable cutting tool tips made of carbide material. They are one of the most mainstream and widely used cutting tools in modern machining processes such as turning, milling, drilling, and boring. Carbide, also known as tungsten steel, is a powder metallurgy composite material mainly composed of two parts: a hard phase, mainly tungsten carbide particles, which provides the alloy with extremely high hardness and wear resistance, and a binder phase, usually cobalt metal, which provides a certain degree of toughness and prevents the insert from chipping.

[0004] Carbide inserts generally require the selection of appropriate tooling fixtures for fixation during use. This is to ensure a stable cutting process and reliable precision. Therefore, there are certain requirements for the precision of both the clamping fixture and the insert. If the fit is too tight or too loose, it will affect the service life of the insert and the machining accuracy.

[0005] Among them, the double-headed cutter is difficult to clamp during production due to its slender shape, and is prone to chipping. This makes it difficult to remove burrs and powder at the tooling slot, and the sharp edge cannot be removed by means of sandblasting.

[0006] In actual use, the only way to remove the burrs on the bottom of the double-ended cutter is by having the operator use a flat file. However, since the blade of a traditional file is flat while the burrs on the bottom of the double-ended cutter are concave, it is very difficult to remove the burrs from the groove at the bottom of the double-ended carbide cutter. Utility Model Content

[0007] To address the aforementioned technical problems, the purpose of this utility model is to provide a carbide blade precision grinding fixture that can improve the burr removal effect on the bottom of a double-ended carbide cutter.

[0008] The objective of this utility model is achieved through the following technical solution:

[0009] A precision grinding fixture for carbide tools includes a base plate, a grinding element disposed on the base plate, and a clamping assembly disposed on the base plate for clamping a workpiece to be processed. The grinding element includes a mounting portion and a grinding portion. One end of the mounting portion is fixedly connected to one end of the grinding portion. One side of the grinding portion is configured as an arc surface, with the protrusion of the arc surface facing the groove of the workpiece to be processed. A sliding portion is disposed at the end of the mounting portion away from the grinding portion. The sliding portion is slidably disposed on the base plate along the length direction of the base plate, and the length direction of the grinding element is parallel to the length direction of the base plate.

[0010] In some possible embodiments, a first groove is formed on the top of the base plate along the length of the base plate, a first slider is slidably disposed in the first groove, the top of the first slider is fixedly connected to the bottom of the sliding part, and the mounting part is detachably connected to the sliding part.

[0011] In some possible embodiments, the clamping assembly includes two clamping blocks slidably disposed on a base plate, the sliding direction of the clamping blocks being perpendicular to the length direction of the base plate, and a driving assembly disposed on the base plate for driving the two clamping blocks to move toward each other or away from each other.

[0012] In some possible embodiments, a second groove is provided on the top of the base plate along the length direction perpendicular to the base plate, and a second slider is slidably disposed in the second groove. There are two second sliders, and the two second sliders are connected to two clamping blocks in a one-to-one correspondence. The driving component is used to drive the two second sliders to move in a direction that is closer to or further away from each other.

[0013] In some possible embodiments, a buffer groove is provided on the top of the second slider along the length of the second slide groove, and a buffer block is slidably disposed in the buffer groove. The top of the buffer block is fixedly connected to the bottom of the clamping block. An elastic element is provided in the buffer groove, and the elastic element acts on the buffer block to drive the two buffer blocks to move toward each other.

[0014] In some possible embodiments, the drive assembly includes a drive shaft and a drive screw. The drive shaft is rotatably disposed on one side of the base plate, and the drive screw is rotatably disposed within the second slide groove along the length direction of the second slide groove. One end of the drive screw is rotatably connected to the inner wall of the second slide groove, and the other end is coaxially fixedly connected to the drive shaft. Two helical grooves with opposite directions of rotation are provided at both ends of the drive screw, and two second sliders are respectively threaded onto both ends of the drive screw.

[0015] In some possible embodiments, a knob is coaxially fixed at the end of the drive shaft away from the drive screw, the diameter of the knob is larger than that of the drive shaft, and anti-slip texture is fixedly provided on the peripheral wall of the knob.

[0016] In some possible embodiments, the tops of the sidewalls of the two clamping blocks that are close to each other are set as inclined surfaces, with the tops of the two inclined surfaces facing away from each other. The inclined surfaces are used to slide into contact with the workpiece to be processed. An abutment strip is fixedly provided at the bottom of the sidewalls of the clamping blocks that are close to each other in the horizontal direction. The top of the abutment strip is used to abut against the workpiece to be processed, and the top of the abutment strip is covered with a protective pad.

[0017] In summary, the technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0018] 1. By setting up a grinding head with an arc-shaped structure, the protrusions precisely correspond to the groove shape of the workpiece to be processed, which can achieve a high degree of fitting grinding operation. The arc-shaped design can effectively enter the complex groove area at the bottom of the double-ended cutter, and perform fine processing on burrs that are difficult to reach with traditional files, significantly improving the comprehensiveness and consistency of grinding, avoiding grinding dead corners or workpiece damage caused by shape mismatch, thereby improving the surface quality and processing accuracy of the workpiece.

[0019] 2. The grinding part cooperates with the first sliding groove and the first slider on the base plate through the sliding part to achieve flexible and stable sliding along the length of the base plate. This allows the operator to adjust the grinding position as needed to adapt to the processing requirements of workpieces of different sizes. At the same time, the mounting part and the sliding part adopt a detachable connection method, which facilitates the replacement or maintenance of the grinding part, extends the service life of the tooling, and improves the versatility and economy of the equipment.

[0020] 3. The clamping assembly adopts a bidirectional sliding clamping block structure, combined with a drive screw and a spiral groove design with opposite rotation directions, which can realize the synchronous opposite or reverse movement of the two clamping blocks, ensuring that the workpiece is clamped evenly and stably, avoiding workpiece displacement or damage caused by uneven clamping force. The combination design of the top inclined surface and bottom abutment strip of the clamping block can guide the workpiece to be smoothly positioned, and reduce pressure damage to the workpiece surface through the protective pad, thereby improving clamping safety and processing reliability.

[0021] 4. The buffer groove, buffer block and elastic element inside the second slider constitute a buffer system, which can provide a certain elastic compensation during the clamping process, adapt to the slight changes in the size of the workpiece or the installation error, and prevent the workpiece from breaking or deforming due to over-clamping. The buffer mechanism combined with the precision control of the drive component further enhances the adaptability and stability of the tooling, and is especially suitable for the precision clamping and grinding of brittle materials such as cemented carbide, effectively ensuring the safety of the processing process and the quality of the finished product. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0023] Figure 2 This is a schematic diagram of the workpiece to be processed and the grinding part according to an embodiment of the present utility model;

[0024] Figure 3 This is a schematic diagram of the installation structure of the grinding component according to an embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the clamping assembly and driving assembly according to an embodiment of the present utility model;

[0026] Figure 5 This is a cross-sectional view of the second slider in an embodiment of the present invention.

[0027] Icons: 1. Base plate; 11. Workpiece to be processed; 2. Grinding part; 21. Mounting part; 22. Grinding part; 23. Arc surface; 24. Sliding part; 25. First slide groove; 26. First slider; 27. Mounting groove; 28. Mounting block; 3. Clamping assembly; 31. Clamping block; 4. Drive assembly; 41. Drive shaft; 42. Drive screw; 43. Spiral groove; 44. Knob; 45. Anti-slip texture; 5. Second slide groove; 51. Second slider; 52. Buffer groove; 53. Buffer block; 54. Elastic element; 6. Inclined surface; 61. Abutment strip. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] The following is for reference Figures 1 to 5 The present invention will be described in further detail below.

[0030] Reference Figure 1 A precision grinding fixture for cemented carbide tools includes a base plate 1, a grinding component 2 disposed on the base plate 1, and a clamping assembly 3 disposed on the base plate 1, the clamping assembly 3 being used to clamp the workpiece 11 to be processed.

[0031] like Figure 1 and Figure 2 As shown, the workpiece 11 to be processed is a double-ended carbide cutting tool. Figure 1 and Figure 2 In the process, both double-ended carbide cutters are positioned with the bottom facing upwards and the cutter head facing downwards. The burrs in the bottom groove of the double-ended carbide cutter are polished by the grinding component 2.

[0032] Reference Figure 1 and Figure 2The grinding part 2 includes a mounting part 21 and a grinding part 22. One end of the mounting part 21 is fixedly connected to one end of the grinding part 22. One side of the grinding part 22 is set as an arc surface 23, and the protrusion of the arc surface 23 is set towards the groove of the workpiece 11 to be processed.

[0033] Reference Figure 1 and Figure 3 The mounting part 21 is provided with a sliding part 24 at the end away from the grinding part 22. The sliding part 24 is slidably disposed on the base plate 1 along the length direction of the base plate 1. The length direction of the grinding part 2 is parallel to the length direction of the base plate 1.

[0034] The grinding part 2 cooperates with the first sliding groove 25 and the first slider 26 on the base plate 1 through the sliding part 24, so as to achieve flexible and stable sliding along the length direction of the base plate 1, which makes it easy for the operator to adjust the grinding position as needed to adapt to the processing requirements of workpieces of different sizes.

[0035] Reference Figure 1 and Figure 3 The top of the base plate 1 is provided with a first groove 25 along the length of the base plate 1. A first slider 26 is slidably disposed in the first groove 25. The top of the first slider 26 is fixedly connected to the bottom of the sliding part 24. The mounting part 21 is detachably connected to the sliding part 24.

[0036] As one embodiment of this utility model, refer to Figure 1 and Figure 3 The first slide groove 25 is a T-shaped groove, and the first slider 26 is correspondingly set as a T-shaped block.

[0037] As one embodiment of this utility model, refer to Figure 3 A mounting groove 27 is vertically formed on the side wall of the sliding part 24, with an opening at the top. A mounting block 28 is fixedly mounted at the tail of the mounting part 21, and the mounting block 28 is slidably connected to the mounting groove 27. The mounting part 21 and the sliding part 24 are detachably connected by insertion. The detachable connection between the mounting part 21 and the sliding part 24 facilitates the replacement or maintenance of the grinding part 2, extends the service life of the tooling, and improves the versatility and economy of the equipment.

[0038] Reference Figure 1 and Figure 4 As one embodiment of the present invention, the clamping component 3 includes two clamping blocks 31, which are slidably disposed on the base plate 1. The sliding direction of the clamping blocks 31 is perpendicular to the length direction of the base plate 1. A driving component 4 is disposed on the base plate 1, which is used to drive the two clamping blocks 31 to move toward each other or away from each other.

[0039] Reference Figure 4The top of the base plate 1 is provided with a second slide groove 5 along the length direction perpendicular to the base plate 1. A second slider 51 is slidably arranged in the second slide groove 5. There are two second sliders 51. The two second sliders 51 are connected to two clamping blocks 31 in a one-to-one correspondence. The driving component 4 is used to drive the two second sliders 51 to move in a direction that is closer to or further away from each other.

[0040] As one embodiment of this utility model, refer to Figure 4 The second slide 5 is a T-shaped groove, and the second slider 51 is a T-shaped block.

[0041] Reference Figure 5 The top of the second slider 51 is provided with a buffer groove 52 along the length of the second slide groove 5. A buffer block 53 is slidably disposed in the buffer groove 52. The top of the buffer block 53 is fixedly connected to the bottom of the clamping block 31. An elastic element 54 is provided in the buffer groove 52. The elastic element 54 acts on the buffer block 53 to drive the two buffer blocks 53 to move toward each other.

[0042] Reference Figure 5 In one embodiment of this utility model, the elastic element 54 is configured as a compression spring, with one end of the elastic element 54 fixedly connected to the side wall of the buffer block 53 and the other end fixedly connected to the inner wall of the buffer groove 52.

[0043] The buffer groove 52, buffer block 53 and elastic element 54 inside the second slider 51 constitute a buffer system, which can provide a certain elastic compensation during the clamping process, adapt to the slight size changes or installation errors of the workpiece, and prevent the workpiece from breaking or deforming due to over-clamping. The buffer structure, combined with the precision control of the drive component 4, further enhances the adaptability and stability of the tooling, and is especially suitable for the precision clamping and grinding of brittle materials such as cemented carbide, effectively ensuring the safety of the processing process and the quality of the finished product.

[0044] Reference Figure 4 As one embodiment of this utility model, the drive assembly 4 includes a drive shaft 41 and a drive screw 42. The drive shaft 41 is rotatably disposed on one side of the base plate 1. The drive screw 42 is rotatably disposed in the second slide groove 5 along the length direction of the second slide groove 5. One end of the drive screw 42 is rotatably connected to the inner wall of the second slide groove 5, and the other end is coaxially fixedly connected to the drive shaft 41. Two spiral grooves 43 with opposite directions of rotation are opened at both ends of the drive screw 42. Two second sliders 51 are respectively threaded onto both ends of the drive screw 42.

[0045] The clamping assembly 3 adopts a bidirectional sliding clamping block 31 structure, which, together with the drive screw 42 and the spiral groove 43 with opposite rotation direction, can realize the synchronous opposite or reverse movement of the two clamping blocks 31, ensuring that the workpiece is clamped evenly and stably, and avoiding workpiece displacement or damage caused by uneven clamping force.

[0046] Reference Figure 4 A knob 44 is coaxially fixed at one end of the drive shaft 41 away from the drive screw 42. The diameter of the knob 44 is larger than that of the drive shaft 41, and anti-slip texture 45 is fixedly provided on the peripheral wall of the knob 44.

[0047] As one embodiment of this utility model, refer to Figure 4 and Figure 5 The top of the sidewalls of the two clamping blocks 31 that are close to each other are set as inclined surfaces 6, with the tops of the two inclined surfaces 6 facing away from each other. The inclined surfaces 6 are used to slide into contact with the workpiece 11 to be processed. The bottom of the sidewalls of the clamping blocks 31 that are close to each other is fixedly provided with an abutment strip 61 in the horizontal direction. The top of the abutment strip 61 is used to abut against the workpiece 11 to be processed, and the top of the abutment strip 61 is covered with a protective pad (not shown in the figure). The combined design of the inclined surface 6 at the top of the clamping block 31 and the abutment strip 61 at the bottom can guide the workpiece to be smoothly positioned, and reduce the pressure damage to the surface of the workpiece through the protective pad, thereby improving clamping safety and processing reliability.

[0048] The implementation principle of the carbide tool precision grinding fixture proposed in this embodiment of the invention is as follows:

[0049] By setting a grinding part 22 with an arc surface 23 structure, the protrusion of which precisely corresponds to the groove shape of the workpiece 11 to be processed, a grinding operation with high fit can be achieved. The arc surface 23 design can effectively enter the complex groove area at the bottom of the double-ended cutter, and perform fine processing on burrs that are difficult to reach with traditional files, significantly improving the comprehensiveness and consistency of grinding, avoiding grinding dead corners or workpiece damage caused by shape mismatch, thereby improving the surface quality and processing accuracy of the workpiece.

[0050] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A precision grinding fixture for cemented carbide cutting tools, characterized in that: Includes a base plate (1), on which a grinding component (2) is provided, and on which a clamping assembly (3) is provided, the clamping assembly (3) being used to clamp the workpiece (11) to be processed. The grinding part (2) includes a mounting part (21) and a grinding part (22). One end of the mounting part (21) is fixedly connected to one end of the grinding part (22). One side of the grinding part (22) is set as an arc surface (23), and the protrusion of the arc surface (23) is set towards the groove of the workpiece (11) to be processed. The mounting part (21) is provided with a sliding part (24) at one end away from the grinding part (22). The sliding part (24) is slidably disposed on the base plate (1) along the length direction of the base plate (1). The length direction of the grinding part (2) is parallel to the length direction of the base plate (1).

2. The carbide tool precision grinding fixture according to claim 1, characterized in that: The top of the base plate (1) is provided with a first groove (25) along the length direction of the base plate (1). A first slider (26) is slidably arranged in the first groove (25). The top of the first slider (26) is fixedly connected to the bottom of the sliding part (24). The mounting part (21) and the sliding part (24) are detachably connected.

3. The carbide tool precision grinding fixture according to claim 1, characterized in that: The clamping assembly (3) includes two clamping blocks (31), which are slidably disposed on the base plate (1). The sliding direction of the clamping blocks (31) is perpendicular to the length direction of the base plate (1). A driving assembly (4) is provided on the base plate (1). The driving assembly (4) is used to drive the two clamping blocks (31) to move toward each other or away from each other.

4. The carbide tool precision grinding fixture according to claim 3, characterized in that: The top of the base plate (1) is provided with a second slide groove (5) along the length direction perpendicular to the base plate (1). A second slider (51) is slidably arranged in the second slide groove (5). There are two second sliders (51). The two second sliders (51) are connected to two clamping blocks (31) in a one-to-one correspondence. The driving component (4) is used to drive the two second sliders (51) to move in a direction that is closer to or further away from each other.

5. The carbide tool precision grinding fixture according to claim 4, characterized in that: The top of the second slider (51) is provided with a buffer groove (52) along the length of the second slide groove (5). A buffer block (53) is slidably arranged in the buffer groove (52). The top of the buffer block (53) is fixedly connected to the bottom of the clamping block (31). An elastic element (54) is provided in the buffer groove (52). The elastic element (54) acts on the buffer block (53) to drive the two buffer blocks (53) to move toward each other.

6. The carbide tool precision grinding fixture according to claim 4, characterized in that: The drive assembly (4) includes a drive shaft (41) and a drive screw (42). The drive shaft (41) is rotatably disposed on one side of the base plate (1). The drive screw (42) is rotatably disposed in the second slide groove (5) along the length direction of the second slide groove (5). One end of the drive screw (42) is rotatably connected to the inner wall of the second slide groove (5), and the other end is coaxially fixedly connected to the drive shaft (41). Two spiral grooves (43) with opposite directions of rotation are opened at both ends of the drive screw (42). Two second sliders (51) are respectively threaded onto both ends of the drive screw (42).

7. The cemented carbide tool precision grinding fixture according to claim 6, characterized in that: A knob (44) is coaxially fixed at one end of the drive shaft (41) away from the drive screw (42). The diameter of the knob (44) is larger than that of the drive shaft (41), and anti-slip texture (45) is fixedly provided on the peripheral wall of the knob (44).

8. The carbide tool precision grinding fixture according to claim 3, characterized in that: The top of the sidewalls of the two clamping blocks (31) that are close to each other are set as inclined surfaces (6), and the top of the two inclined surfaces (6) are set in a direction that is far away from each other. The inclined surfaces (6) are used to slide and contact the workpiece (11) to be processed. The bottom of the sidewalls of the clamping blocks (31) that are close to each other are fixedly provided with abutment strip (61) in the horizontal direction. The top of the abutment strip (61) is used to abut against the workpiece (11) to be processed. The top of the abutment strip (61) is covered with a protective pad.

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