A tungsten carbide flat knife with a spiral chip removal groove

Abstract

This utility model discloses a tungsten carbide flat cutter with a spiral chip-removing groove, relating to the field of CNC machining tool technology. The tungsten carbide flat cutter includes a tungsten carbide cutter body and a chuck located on one side of the cutter body. It also includes a cutting edge assembly, a shank assembly, and a quick-change tool assembly. This utility model, through the design of the spiral chip-removing groove's helix angle and gradually varying groove depth, can quickly remove chips from the cutting area, avoiding chip accumulation that affects machining accuracy and reducing the risk of chips entangled in the tool. The flat cutter, through the combination of a center end and a spiral peripheral cutting edge, enables the tool to perform both planar milling and axial feed machining without frequent tool changes, thus improving machining efficiency. The flat cutter uses WC-Co cemented carbide material combined with a chamfered cutting edge design, ensuring high tool hardness and wear resistance while enhancing cutting edge strength, extending tool life, and reducing machining costs.

Description

Technical Field

[0001] This utility model relates to the field of CNC machining tool technology, specifically a tungsten carbide flat tool with a spiral chip removal groove. Background Technology

[0002] In CNC milling, flat cutters are one of the most commonly used cutting tools, mainly used for planar milling, contour milling, and other machining scenarios. Traditional flat cutters mostly adopt a straight-edge structure or a simple helical-edge structure, and the chip flute design is relatively simple. During the machining process, chips are prone to accumulate in the cutting area. On the one hand, the accumulated chips will rub against the workpiece surface, resulting in a decrease in the surface finish and affecting machining accuracy. On the other hand, chips entangled in the tool will increase chip resistance, accelerate tool wear, and even cause the tool to chip, shortening the tool life. At the same time, some flat cutters are made of high-speed steel, which has poor hardness and wear resistance. When machining materials with high hardness, the cutting edge is prone to wear too quickly, requiring frequent tool replacement and reducing machining efficiency. Utility Model Content

[0003] This invention provides a tungsten carbide flat knife with a spiral chip removal groove, which has the advantages of smooth chip removal and good wear resistance, thus solving the problems of easy chip accumulation and rapid wear of existing flat knives.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a tungsten carbide flat cutter with a spiral chip removal groove, comprising a tungsten carbide cutter body and a device chuck disposed on one side of the tungsten carbide cutter body, and further comprising a cutting edge section assembly, a shank section assembly, and a quick tool change assembly, wherein: The tungsten carbide blade body is made of WC-Co cemented carbide and includes a handle and an inner post of the blade. WC ensures the high hardness and wear resistance of the tool, while Co improves the toughness of the tool body, preventing the tool from breaking due to excessive brittleness.

[0005] The cutting edge assembly includes several spiral peripheral blades, which are evenly distributed on the outer periphery of the inner post of the cutting edge. A spiral chip removal groove is formed between adjacent spiral peripheral blades. The spiral angle of the spiral chip removal groove is set to 30 degrees. The groove depth of the spiral chip removal groove increases linearly from the root of the inner post of the cutting edge to the end. The chamfer angle is 15 degrees.

[0006] As a preferred technical solution of this utility model, the inner column end face of the blade is provided with a plurality of over-center end blades, the over-center end blades are evenly distributed around the center of the end face and smoothly connected with the spiral peripheral blades, and the cutting edge of the spiral peripheral blades is provided with chamfers.

[0007] The design of the over-center end edge allows the tool to perform axial feed machining without the need for additional tool changes, thus improving machining efficiency. The smooth connection between the end edge and the spiral peripheral edge reduces stress concentration during the cutting process and prevents the cutting edge from chipping. At the same time, the chamfer at the edge of the spiral peripheral edge can enhance the strength of the cutting edge and prevent it from being damaged by minor impacts.

[0008] As a preferred technical solution of this utility model, the tool handle section assembly includes a discharge ramp, which is welded between the tool handle and the inner post of the blade. The outer periphery of the tool handle is provided with anti-slip texture, and one side of the anti-slip texture is provided with a centrally symmetrically arranged groove.

[0009] The discharge ramp can prevent chips from being blocked by the tool holder during chip removal, thus improving the smoothness of chip removal. The anti-slip texture can increase the friction between the tool holder and the equipment chuck after installation, preventing the tool from slipping during processing.

[0010] As a preferred technical solution of this utility model, the quick tool change assembly includes an axial flat key, which is symmetrically welded to the outer periphery of the tool holder, and the inner wall of the device chuck is provided with a sliding groove that slides in cooperation with the axial flat key.

[0011] When installing the tool, the axial flat key can be used to precisely match the groove of the chuck, eliminating the need for rotational alignment and enabling rapid circumferential positioning of the tool holder and chuck. This solves the problem of repeated angle adjustments required by traditional single-key or keyless structures.

[0012] As a preferred embodiment of this utility model, the groove is fitted with a locking tongue and slides together, a spring is welded between the bottom side of the locking tongue and the bottom of the groove, the inner wall of the equipment chuck is provided with several slots, and the locking tongue has a fan-shaped structure and is set corresponding to the slots.

[0013] As a preferred technical solution of this utility model, a rectangular through hole is provided on one side of the slot, the rectangular through hole is fitted with a pin and slides, the pin is welded to the inner side of the unlocking ring, and the unlocking ring is nested on the outer periphery of the equipment chuck.

[0014] Compared with the prior art, this utility model provides a tungsten carbide flat cutter with a spiral chip removal groove, which has the following advantages: The design of the spiral chip removal groove's helix angle and gradually varying groove depth allows for rapid chip removal from the cutting area, preventing chip accumulation from affecting machining accuracy and reducing the risk of chips entangled in the tool; the combination design of the center end and the spiral peripheral cutting edge enables the tool to perform both planar milling and axial feed machining, eliminating the need for frequent tool changes and improving machining efficiency; the use of WC-Co carbide material combined with a chamfered cutting edge design ensures high tool hardness and wear resistance, enhances cutting edge strength, extends tool life, and reduces machining costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a structural diagram of the blade segment assembly of this utility model; Figure 3 This is a schematic diagram of the tool holder section assembly of this utility model; Figure 4 This is a partial structural diagram of the quick tool changer assembly of this utility model; Figure 5 This is a schematic diagram of the clamp structure of the device of this utility model.

[0016] In the diagram: 1. Tungsten steel cutter body; 2. Equipment chuck; 3. Cutting edge section assembly; 4. Handle section assembly; 5. Quick tool change assembly; 11. Handle; 12. Inner cutting edge post; 21. Slide groove; 31. Helical peripheral cutting edge; 32. Helical chip removal groove; 33. Over-center end cutting edge; 34. Chamfer; 41. Discharge ramp; 42. Anti-slip texture; 43. Groove; 51. Axial key; 52. Locking tongue; 53. Spring; 54. Slot; 55. Rectangular through hole; 56. Ejector pin; 57. Unlocking ring. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0018] Please see Figures 1-5 This utility model discloses a tungsten carbide flat cutter with a spiral chip removal groove, including a tungsten carbide cutter body 1 and a device chuck 2 disposed on one side of the tungsten carbide cutter body 1, and also includes a cutting edge section assembly 3, a handle section assembly 4, and a quick tool change assembly 5, wherein: The tungsten carbide blade 1 is made of WC-Co cemented carbide and includes a handle 11 and an inner post 12 of the blade. WC ensures the high hardness and wear resistance of the tool, while Co improves the toughness of the tool body, preventing the tool from breaking due to excessive brittleness.

[0019] Please refer to the appendix. Figure 2 The blade section assembly 3 includes several spiral peripheral blades 31, which are evenly distributed on the outer periphery of the inner blade post 12. A spiral chip removal groove 32 is formed between adjacent spiral peripheral blades 31. The spiral angle of the spiral chip removal groove 32 is set to 30 degrees. The groove depth of the spiral chip removal groove 32 increases linearly from the root of the inner blade post 12 to the end. The chamfer angle 34 is 15 degrees.

[0020] The inner post 12 of the blade is provided with several through-center end blades 33. The through-center end blades 33 are evenly distributed around the center of the end face and smoothly connected with the spiral peripheral blades 31. The edge of the spiral peripheral blades 31 is provided with chamfers 34.

[0021] The design of the over-center end edge 33 enables the tool to perform axial feed machining without the need for additional tool replacement, thus improving machining efficiency. The smooth connection between the end edge and the spiral peripheral edge 31 reduces stress concentration during the cutting process and prevents the cutting edge from chipping. At the same time, the chamfer 34 at the edge of the spiral peripheral edge 31 can enhance the strength of the cutting edge and prevent the cutting edge from chipping due to minor impacts.

[0022] Please refer to the appendix. Figure 3 The tool handle assembly 4 includes a discharge ramp 41, which is welded between the tool handle 11 and the inner post 12 of the blade. The tool handle 11 has anti-slip texture 42 on its outer periphery, and a centrally symmetrical groove 43 is provided on one side of the anti-slip texture 42.

[0023] The discharge ramp 41 can prevent chips from being blocked by the tool holder 11 during chip discharge, thus improving the smoothness of chip discharge. The anti-slip texture 42 can increase the friction between the tool holder 11 and the equipment chuck 2 after installation, preventing the tool from slipping during processing.

[0024] In this embodiment, the 30-degree spiral chip removal groove 32 can ensure that the chips are smoothly discharged along the groove, and avoid the increase of cutting force due to the excessive spiral angle, or the slowing down of chip removal speed due to the excessively small angle. The design of the groove depth gradually increasing from the root of the inner post 12 of the cutting edge can enhance the strength of the cutting body at the root. At the same time, the deeper groove depth at the cutting tip can accommodate more chips, avoid the accumulation of chips at the cutting tip, and improve the smoothness of chip removal. Example 2

[0025] Based on the above embodiment 1, please refer to the appendix. Figure 4 as well as Figure 5 The quick tool change assembly 5 includes an axial key 51, which is symmetrically welded to the outer periphery of the tool holder 11. The inner wall of the equipment chuck 2 is provided with a groove 21 and slides in cooperation with the axial key 51.

[0026] When installing the tool, the axial flat key 51 can be precisely matched with the groove 21 of the chuck 2 of the equipment without the need for rotational alignment, thus achieving rapid circumferential positioning of the tool holder 11 and the chuck and solving the problem of repeated angle adjustments required by traditional single-key or keyless structures.

[0027] The groove 43 is fitted with a locking tongue 52 and slides together. A spring 53 is welded between the bottom side of the locking tongue 52 and the bottom of the groove 43. The inner wall of the equipment chuck 2 is provided with several slots 54. The locking tongue 52 has a fan-shaped structure and is set in correspondence with the slots 54.

[0028] A rectangular through hole 55 is provided on one side of the slot 54. The rectangular through hole 55 is fitted with the ejector pin 56 and slides in fit. The ejector pin 56 is welded to the inner side of the unlocking ring 57. The unlocking ring 57 is nested on the outer periphery of the equipment chuck 2.

[0029] In this embodiment, when the tool holder 11 is inserted into the chuck 2, the locking tongue 52 is squeezed by the inner wall of the chuck and then springed into the slot 54 by the spring 53, realizing the axial quick locking of the tool holder 11 without the need to tighten the screws. When changing the tool, push the unlocking ring 57 towards the blade direction. The unlocking ring 57 drives the ejector pin 56 to slide in the rectangular through hole 55 and pushes it against the arc surface of the locking tongue 52, so that the locking tongue 52 can be disengaged from the slot 54 and the tool holder can be pulled out, which greatly improves the tool changing efficiency.

[0030] The working principle and usage process of this utility model: When using this tungsten carbide flat knife, the 30-degree spiral chip groove 32 can ensure that the chips are smoothly discharged along the groove, and avoid the increase of cutting force due to the excessive spiral angle, or the slowing down of chip discharge speed due to the excessively small angle. The design of the groove depth gradually increasing from the root of the inner post 12 of the blade can enhance the strength of the blade body at the root. At the same time, the deeper groove at the tip can accommodate more chips, avoid the accumulation of chips at the tip, and improve the smoothness of chip discharge. The design of the center end edge 33 enables the tool to perform axial feed machining without the need for additional tool replacement, thus improving machining efficiency. The smooth connection between the end edge and the spiral peripheral edge 31 reduces stress concentration during the cutting process and prevents the cutting edge from chipping. At the same time, the chamfer 34 at the cutting edge of the spiral peripheral edge 31 can enhance the strength of the cutting edge and prevent the cutting edge from chipping due to minor impacts. The tungsten steel cutter body made of WC-Co cemented carbide ensures the high hardness and wear resistance of the cutter through WC, and improves the toughness of the cutter body through Co, thus preventing the cutter from breaking due to excessive brittleness. When installing the flat tool, the axial flat key 51 can be precisely matched with the groove 21 of the chuck 2 without rotational alignment, achieving rapid circumferential positioning of the tool holder 11 and the chuck. This solves the problem of repeated angle adjustments required by traditional single-key or keyless structures. When the tool holder 11 is inserted into the chuck 2 to a specified depth, the locking tongue 52 is squeezed by the inner wall of the chuck and then springed into the slot 54 by the spring 53, achieving rapid axial locking of the tool holder 11 without the need for additional screw tightening. When changing the tool, push the unlocking ring 57 towards the cutting edge. The unlocking ring 57 drives the ejector pin 56 to slide in the rectangular through hole 55, and pushes it against the arc surface of the locking tongue 52, causing the locking tongue 52 to disengage from the slot 54 and the tool holder to be pulled out, greatly improving the efficiency of tool changing.

Claims

1. A tungsten carbide flat cutter with a spiral chip removal groove, comprising a tungsten carbide cutter body (1) and a device chuck (2) disposed on one side of the tungsten carbide cutter body (1), characterized in that, It also includes a blade section assembly (3), a handle section assembly (4), and a quick-change assembly (5), wherein: The tungsten steel blade body (1) is made of WC-Co cemented carbide, and the tungsten steel blade body (1) includes a handle (11) and an inner post (12) of the blade. The blade segment assembly (3) includes a plurality of spiral peripheral blades (31), which are evenly distributed on the outer periphery of the inner post (12) of the blade, and a spiral chip removal groove (32) is formed between adjacent spiral peripheral blades (31), and the spiral angle of the spiral chip removal groove (32) is set to thirty degrees. The inner column (12) of the blade is provided with a number of over-center end blades (33). The over-center end blades (33) are evenly distributed around the center of the end face and smoothly connected with the spiral peripheral blade (31). The edge of the spiral peripheral blade (31) is provided with chamfers (34).

2. The tungsten carbide flat cutter with a spiral chip removal groove according to claim 1, characterized in that: The depth of the spiral chip removal groove (32) increases linearly from the root of the inner post (12) of the blade to the end, and the chamfer (34) has an angle of fifteen degrees.

3. The tungsten carbide flat cutter with a spiral chip removal groove according to claim 2, characterized in that: The handle assembly (4) includes a discharge ramp (41), which is welded between the handle (11) and the inner post (12) of the blade. The handle (11) has anti-slip texture (42) on its outer periphery, and a centrally symmetrical groove (43) is provided on one side of the anti-slip texture (42).

4. The tungsten carbide flat cutter with a spiral chip removal groove according to claim 1, characterized in that: The quick tool change assembly (5) includes an axial key (51), which is symmetrically welded to the outer periphery of the tool holder (11). The inner wall of the device chuck (2) is provided with a groove (21) and slides in cooperation with the axial key (51).

5. The tungsten carbide flat cutter with a spiral chip removal groove according to claim 3, characterized in that: The groove (43) is fitted with a locking tongue (52) and slides together. A spring (53) is welded between the bottom side of the locking tongue (52) and the bottom of the groove (43).

6. The tungsten carbide flat cutter with a spiral chip removal groove according to claim 5, characterized in that: The inner wall of the device chuck (2) is provided with several slots (54), and the locking tongue (52) is a fan-shaped structure and is set in correspondence with the slots (54).

7. The tungsten carbide flat cutter with a spiral chip removal groove according to claim 6, characterized in that: The slot (54) has a rectangular through hole (55) on one side. The rectangular through hole (55) fits the ejector pin (56) and slides in fit. The ejector pin (56) is welded to the inner side of the unlocking ring (57). The unlocking ring (57) is nested on the outer periphery of the equipment chuck (2).

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