Thread machining blade

Abstract

A protruding cutting unit is arranged at the vertex angle of a blade body of the thread machining blade, the cutting unit comprises an arc edge, a cutting edge, a sleeking edge and a chip breaking groove, and the cutting unit extends towards the blade body along the arc edge and the cutting edge to form a first front tool face, a second front tool face and a chip breaking table. And the second front tool face and the chip breaking table form a chip breaking groove. The cutting unit adopts a double-large front angle structure, the sharpness of the blade and the strength of the blade are perfectly balanced, the wider chip breaker groove fully ensures the chip deformation space, the phenomenon of tool abrasion or tool breakage is reduced, and the service life of the tool is prolonged. The problem that in the machining process of an existing thread machining blade, due to the blade problem, the thread form precision control is insufficient is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of thread processing equipment, and more specifically, to a thread processing blade. Background Art

[0002] Thread is one of the common geometric features in mechanical engineering and is widely used. During the thread processing, as the cutting unit continues to feed, the cutting depth gradually increases, the chips are squeezed to both sides, and the chips enter the chip groove and deform and curl, which is not easy to break, resulting in chip entanglement that affects the surface quality of the processed workpiece.

[0003] In the blade disclosed in CN202020326225.7, an indexable threaded blade has a blade body provided with a center hole, and three cutting edges are evenly arranged on the blade body, each cutting edge includes a blade cutting out of the workpiece side and a blade cutting into the workpiece side, and the connection between the blade cutting out of the workpiece side and the blade cutting into the workpiece side is set as a blade tip, and the inner side of the blade tip is provided with a chip breaking groove, and the inner side of the chip breaking groove is provided with a first chip breaking boss and a second chip breaking boss in sequence, and the first chip breaking boss is smaller than the second chip breaking boss; a chip guide groove is provided around the second chip breaking boss. In order to discharge the debris generated during the cutting process in time, the patent sets a chip breaking groove, a first chip breaking boss, a second chip breaking boss and a chip guide groove. The setting of the chip breaking groove increases the chip holding space on the side where the blade cuts out of the workpiece, reduces the friction resistance of the chips on the side where the blade cuts out of the workpiece, increases the heat dissipation space, and the cutting fluid can fully enter the groove area for cooling and lubrication. The first chip breaking boss near the cutting edge can ensure that the cutter body can effectively break chips when the cutting depth is small, and can pick up chips in time and cause them to curl to reduce the radius of curvature when the cutting depth is large. As the cutting depth increases, the chips produced by cutting will become thinner and wider. When this thin and wide chip flows from the cutting edge to the side where the blade cuts out of the workpiece, it will be picked up by the first chip breaking boss and will produce a certain amount of curling and continue to move backward. When it reaches the second chip breaking boss, the chip is blocked and curled for the second time, and the radius of curvature is further reduced, so that the chips are discharged smoothly, avoiding the chips from wrapping around the workpiece or scratching the workpiece, and improving the thread processing quality. However, the blade structure of this patent mainly focuses on the impact of chips on the workpiece during processing, and does not take into account aspects such as the blade edge strength. During the thread turning process, the thread tool often needs to be re-installed and re-set due to wear and chipping of the thread tool. The quality of tool installation and tool setting directly affects the accuracy of the turned thread, especially in high-precision thread processing. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a thread processing blade in view of the disadvantage that the thread tooth profile has quality problems easily caused by blade problems in the existing thread processing blade process.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] A thread processing insert comprises an insert body, a positioning hole is arranged at the geometric center of the insert body, a protruding cutting unit is arranged at the top corner of the insert body, and the cutting unit comprises an arc edge, a cutting edge, a wiper edge and a chip breaker groove.

[0007] The blade body includes an upper surface, a lower surface, and multiple side surfaces and arc surfaces at the top corners for connecting the upper surface and the lower surface. The arc surface intersects with the upper surface and / or the lower surface to form an arc edge. The side surfaces on both sides of the arc surface intersect with the upper surface and / or the lower surface to form a cutting edge. The side surfaces adjacent to the cutting edge intersect with the upper surface and / or the lower surface to form a wiper edge. The angle between the wiper edge and the cutting edge is 15° to 20°.

[0008] The cutting unit extends along the arc edge and the cutting edge toward the blade body to form a rake face with a certain blade inclination angle. The rake face includes a first rake face and a second rake face. The second rake face and the chip breaker form a chip breaker groove.

[0009] Further, the angle α1 formed by the first rake face and the horizontal plane where the upper surface is located is 15° to 20°. Preferably, the angle α1 formed by the first rake face and the horizontal plane where the upper surface is located is 16.5°.

[0010] Further, the horizontal edge width L1 of the first rake face is 0 mm to 0.5 mm. Preferably, the horizontal edge width L1 of the first rake face is 0.3 mm.

[0011] Further, the angle α2 formed by the second rake face and the horizontal plane where the upper surface is located is 30° to 50°. Preferably, the angle α2 formed by the second rake face and the horizontal plane where the upper surface is located is 41°.

[0012] Further, the horizontal edge width L2 of the first rake face is 0.1 mm to 0.3 mm. Preferably, the horizontal edge width L2 of the first rake face is 0.2 mm.

[0013] Furthermore, the projection distance L3 from the arc edge to the wiper edge is 1 to 1.3 mm.

[0014] Furthermore, the vertical distance H1 between the bottom of the chip breaker groove and the highest point of the arc edge is 0.1 mm to 0.3 mm. Preferably, the vertical distance H1 between the bottom of the chip breaker groove and the highest point of the arc edge is 0.22 mm.

[0015] Furthermore, the chip breaker is a "V"-shaped chip breaker, which includes an inclined cylindrical surface and smooth side surfaces on both sides.

[0016] Further, the inclination angle α3 of the chip breaker is 10° to 20°. Preferably, the inclination angle α3 of the chip breaker is 16°.

[0017] Furthermore, the blade body is a polygonal body, and a plurality of cutting units are provided on the blade body.

[0018] Compared with the prior art, the beneficial effects are:

[0019] The cutting unit of the utility model adopts a double rake angle structure, and the cutting edge inclination angle design of the first rake face and the second rake face fully ensures the sharpness of the blade, while taking into account a certain strength. The second rake face and the chip breaker form a chip breaker groove, and the chips are generated and curled in the chip breaker groove. During the continuous processing, the chips are continuously generated and move backward. Under the guidance of the "V"-shaped chip breaker, the chips are folded twice, which can reduce the curling radius of chip generation in a short time, improve the formation and flow of chips, ensure the surface finish of the processed parts, and improve production efficiency. The utility model rounds the cutting edge of the chip unit through the balanced design of the blade edge structure, and combines the reasonable matching of the chip breaker structure to increase the life of the blade and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional diagram of a thread processing insert in Embodiment 1;

[0021] Figure 2 A top view of a thread processing insert;

[0022] Figure 3 It is a partial enlarged view of the cutting unit protruding outward at the top corner of the blade body;

[0023] Figure 4 for Figure 2 a partial cross-sectional view of the blade shown;

[0024] Among them, 1 is a blade body, 2 is a blade side, 3 is a cutting unit, 4 is an upper surface, 5 is a lower surface, 6 is an arc edge, 7 is a cutting edge 1, 8 is a cutting edge 2, 9 is a chip breaker, 10 is a second front cutting edge, 11 is a first front cutting edge, 12 is a polishing edge, and 20 is a positioning hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that if there are directional indications (such as up, down, left, right, front, and back) in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly. If there are descriptions of "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0029] Example 1

[0030] The present embodiment provides a thread processing insert, comprising an insert body 1, a positioning hole 20 is provided at the geometric center of the insert body 1, a protruding cutting unit 3 is provided at the top corner of the insert body 1, and the cutting unit 3 includes an arc edge 6, a cutting edge, a finishing edge 12 and a chip breaker groove.

[0031] The blade body 1 includes an upper surface 4, a lower surface 5 and multiple side surfaces for connecting the upper surface 4 and the lower surface 5. The tip of the cutting unit 3 is an arc surface, and the arc surface intersects with the upper surface 4 to form an arc edge 6. The two sides of the arc surface are vertical blade side surfaces 2. The blade side surfaces 2 intersect with the upper surface 4 to form a cutting edge 1 7 and a cutting edge 2 8, respectively. The side surfaces adjacent to the cutting edge 1 7 and the cutting edge 2 8 intersect with the upper surface 4 to form a wiper edge 12. The angle between the wiper edge 12 and the cutting edge is 15° to 20°.

[0032] The cutting unit 3 extends along the arc edge 6 and the cutting edge toward the blade body 1 to form a rake face, the rake face has a certain inclination angle, and the cutting edge forms a certain rake angle. The rake face includes a first rake face 11 and a second rake face 10, the second rake face 10 intersects with the chip breaker 9, and the second rake face 10 and the chip breaker 9 form a chip breaker groove. The center line of the two side cutting edges is a symmetrical structure, and along the center line are the arc edge 6, the first rake face 11, the second rake face 10 and the chip breaker 9 in sequence.

[0033] Example 2

[0034] The present embodiment provides a thread processing insert, including a triangular-shaped insert body 1, a positioning hole 20 is provided at the geometric center of the insert body 1, a cross-cutting plane is provided at the three vertex corners of the insert body 1, and a protruding cutting unit 3 is provided on the cross-cutting plane. The cutting unit 3 includes an arc edge 6, a cutting edge, a finishing edge 12 and a chip breaker groove.

[0035] The blade body 1 includes an upper surface 4, a lower surface 5 and multiple side surfaces for connecting the upper surface 4 and the lower surface 5. The tip of the cutting unit 3 is an arc surface, and the arc surface intersects with the upper surface 4 and the lower surface 5 to form an arc edge 6. The two sides of the arc surface are vertical blade side surfaces 2. The blade side surfaces 2 intersect with the upper surface 4 and the lower surface 5 to form a cutting edge 1 7 and a cutting edge 2 8 respectively. The side surfaces adjacent to the cutting edge 1 7 and the cutting edge 2 8 intersect with the upper surface 4 to form a wiper edge 12. The cutting edge and the wiper edge 12 are connected by an arc edge, and the angle between the wiper edge 12 and the cutting edge is 15° to 20°.

[0036] The cutting unit 3 extends along the arc edge 6 and the cutting edge toward the blade body 1 to form a rake face, the rake face has a certain inclination angle, and the cutting edge forms a certain rake angle. The rake face includes a first rake face 11 and a second rake face 10, the second rake face 10 intersects with the chip breaker 9, and the second rake face 10 and the chip breaker 9 form a chip breaker groove. The center line of the two side cutting edges is a symmetrical structure, and along the center line are the arc edge 6, the first rake face 11, the second rake face 10 and the chip breaker 9 in sequence.

[0037] Example 3

[0038] The present embodiment provides a thread processing insert, including a triangular-shaped insert body 1, a positioning hole 20 is provided at the geometric center of the insert body 1, a cross-cutting plane is provided at the three vertex corners of the insert body 1, and a protruding cutting unit 3 is provided on the cross-cutting plane. The cutting unit 3 includes an arc edge 6, a cutting edge, a finishing edge 12 and a chip breaker groove.

[0039] The blade body 1 includes an upper surface 4, a lower surface 5 and multiple side surfaces for connecting the upper surface 4 and the lower surface 5. The tip of the cutting unit 3 is an arc surface, and the arc surface intersects with the upper surface 4 and the lower surface 5 to form an arc edge 6. The two sides of the arc surface are vertical blade side surfaces 2. The blade side surfaces 2 intersect with the upper surface 4 and the lower surface 5 to form a cutting edge 1 7 and a cutting edge 2 8, respectively, and form a certain blade inclination angle. The side surface adjacent to the cutting edge 1 7 and the cutting edge 2 8 intersects with the upper surface 4 to form a wiper edge 12. The cutting edge and the wiper edge 12 are connected by an arc edge, and the angle between the wiper edge 12 and the cutting edge is 15° to 20°.

[0040] The cutting unit 3 extends along the arc edge 6 and the cutting edge toward the blade body 1 to form a first rake face 11 and a second rake face 10. The angle α1 formed between the first rake face 11 and the horizontal plane where the upper surface 4 is located is 15° to 20°, and the angle α2 formed between the second rake face 10 and the horizontal plane where the upper surface 4 is located is 30° to 50°. The second rake face 10 intersects with the chip breaker 9, and the second rake face 10 and the chip breaker 9 form a chip breaker groove. The center line of the two side cutting edges is a symmetrical structure, and along the center line are the arc edge 6, the first rake face 11, the second rake face 10 and the chip breaker 9 in sequence.

[0041] Example 4

[0042] The present embodiment provides a thread processing insert, including a triangular-shaped insert body 1, a positioning hole 20 is provided at the geometric center of the insert body 1, a cross-cutting plane is provided at the three vertex corners of the insert body 1, and a protruding cutting unit 3 is provided on the cross-cutting plane. The cutting unit 3 includes an arc edge 6, a cutting edge, a finishing edge 12 and a chip breaker groove.

[0043] The blade body 1 includes an upper surface 4, a lower surface 5 and multiple side surfaces for connecting the upper surface 4 and the lower surface 5. The tip of the cutting unit 3 is an arc surface, and the arc surface intersects with the upper surface 4 and the lower surface 5 to form an arc edge 6. The two sides of the arc surface are vertical blade side surfaces 2. The blade side surfaces 2 intersect with the upper surface 4 and the lower surface 5 to form a cutting edge 1 7 and a cutting edge 2 8 respectively. The side surfaces adjacent to the cutting edge 1 7 and the cutting edge 2 8 intersect with the upper surface 4 to form a wiper edge 12. The cutting edge and the wiper edge 12 are connected by an arc edge, and the angle between the wiper edge 12 and the cutting edge is 15° to 20°.

[0044] The cutting unit 3 extends along the arc edge 6 and the cutting edge toward the blade body 1 to form a first rake face 11 and a second rake face 10. The angle α1 formed by the first rake face 11 and the horizontal plane where the upper surface 4 is located is 15° to 20°, the horizontal edge width L1 of the first rake face 11 is 0mm to 0.5mm, the angle α2 formed by the second rake face 10 and the horizontal plane where the upper surface 4 is located is 30° to 50°, and the horizontal edge width L2 of the second rake face 10 is 0.1mm to 0.3mm. The second rake face 10 intersects with the chip breaker 9, and the second rake face 10 and the chip breaker 9 form a chip breaker groove. The center line of the two side cutting edges is a symmetrical structure, and along the center line are the arc edge 6, the first rake face 11, the second rake face 10 and the chip breaker 9 in sequence.

[0045] Example 5

[0046] The present embodiment provides a thread processing insert, including a triangular-shaped insert body 1, a positioning hole 20 is provided at the geometric center of the insert body 1, a cross-cutting plane is provided at the three vertex corners of the insert body 1, and a protruding cutting unit 3 is provided on the cross-cutting plane. The cutting unit 3 includes an arc edge 6, a cutting edge, a finishing edge 12 and a chip breaker groove.

[0047] The blade body 1 includes an upper surface 4, a lower surface 5 and multiple side surfaces for connecting the upper surface 4 and the lower surface 5. The tip of the cutting unit 3 is an arc surface, and the arc surface intersects with the upper surface 4 and the lower surface 5 to form an arc edge 6. The two sides of the arc surface are vertical blade side surfaces 2. The blade side surfaces 2 intersect with the upper surface 4 and the lower surface 5 to form a cutting edge 1 7 and a cutting edge 2 8, respectively, and form a certain blade inclination angle. The side surface adjacent to the cutting edge 1 7 and the cutting edge 2 8 intersects with the upper surface 4 to form a wiper edge 12. The cutting edge and the wiper edge 12 are connected by an arc edge, and the angle between the wiper edge 12 and the cutting edge is 15° to 20°. The projection distance L3 from the arc edge 6 to the wiper edge 12 is 1 to 1.3 mm.

[0048] The cutting unit 3 extends along the arc edge 6 and the cutting edge toward the blade body 1 to form a first rake face 11 and a second rake face 10. The angle α1 formed by the first rake face 11 and the horizontal plane where the upper surface 4 is located is 15° to 20°, and the horizontal edge width L1 of the first rake face 11 is 0mm to 0.5mm. The angle α2 formed by the second rake face 10 and the horizontal plane where the upper surface 4 is located is 30° to 50°, and the horizontal edge width L2 of the second rake face 10 is 0.1mm to 0.3mm. The second rake face 10 intersects with the chip breaker 9, and the inclination angle α3 of the chip breaker 9 is 10° to 20°, and the second rake face 10 and the chip breaker 9 form a chip breaker groove, and the vertical distance H1 from the bottom of the chip breaker groove to the highest point of the arc edge 6 is 0.1mm to 0.3mm. The center line of the two side cutting edges is a symmetrical structure, and along the center line are the arc edge 6, the first rake face 11, the second rake face 10 and the chip breaker 9 in sequence.

[0049] Example 6

[0050] This embodiment provides a thread processing insert, such as Figure 1 , including a triangular blade body 1, a positioning hole 20 is provided at the geometric center of the blade body 1, a cross-cutting plane is provided at the three vertex corners of the blade body 1, and a protruding cutting unit 3 is provided on the cross-cutting plane, and the cutting unit 3 includes an arc edge 6, a cutting edge, a polishing edge 12 and a chip breaker groove.

[0051] The blade body 1 includes an upper surface 4, a lower surface 5 and multiple side surfaces for connecting the upper surface 4 and the lower surface 5. The tip of the cutting unit 3 is an arc surface, and the arc surface intersects with the upper surface 4 and the lower surface 5 to form an arc edge 6. The two sides of the arc surface are vertical blade side surfaces 2. The blade side surfaces 2 intersect with the upper surface 4 and the lower surface 5 to form a cutting edge 1 7 and a cutting edge 2 8, respectively, and form a certain blade inclination angle. The side surface adjacent to the cutting edge 1 7 and the cutting edge 2 8 intersects with the upper surface 4 to form a wiper edge 12. The cutting edge and the wiper edge 12 are connected by an arc edge, and the angle between the wiper edge 12 and the cutting edge is 15° to 20°. The projection distance L3 from the arc edge 6 to the wiper edge 12 is 1 to 1.3 mm.

[0052] The cutting unit 3 extends along the arc edge 6 and the cutting edge toward the blade body 1 to form a first rake face 11 and a second rake face 10. The angle α1 formed by the first rake face 11 and the horizontal plane where the upper surface 4 is located is 16.5°, and the horizontal blade width L1 of the first rake face 11 is 0.3mm. The angle α2 formed by the second rake face 10 and the horizontal plane where the upper surface 4 is located is 41°, and the horizontal blade width L2 of the second rake face 10 is 0.2mm. The second rake face 10 intersects with the chip breaker 9. The chip breaker 9 is a "V"-shaped chip breaker 9, and its V-shaped bottom faces the arc edge 6, and is composed of an inclined cylindrical surface and smooth side surfaces on both sides. The inclination angle α3 of the chip breaker 9 is 16°. The second rake face 10 and the chip breaker 9 form a chip breaker groove, and the vertical distance H1 from the bottom of the chip breaker groove to the highest point of the arc edge 6 is 0.22mm. The cutting unit 3 is symmetrically structured about the center line of the two side cutting edges, and along the center line are the arc edge 6, the first rake face 11, the second rake face 10 and the chip breaker 9 in sequence.

[0053] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A thread processing insert, characterized in that: It comprises a blade body, a positioning hole is provided at the geometric center of the blade body, a protruding cutting unit is provided at the top corner of the blade body, and the cutting unit comprises an arc edge, a cutting edge, a wiper edge and a chip breaker groove; The blade body comprises an upper surface, a lower surface and a plurality of side surfaces and arc surfaces at the top corners for connecting the upper surface and the lower surface, wherein the arc surface intersects with the upper surface and / or the lower surface to form an arc edge, the side surfaces on both sides of the arc surface intersect with the upper surface and / or the lower surface to form a cutting edge, and the side surfaces adjacent to the cutting edge intersect with the upper surface and / or the lower surface to form a wiper edge, and the angle between the wiper edge and the cutting edge is 15° to 20°; The cutting unit extends along the arc edge and the cutting edge toward the blade body to form a rake face with a certain blade inclination angle. The rake face includes a first rake face and a second rake face. The second rake face and the chip breaker form a chip breaker groove.

2. The thread machining insert according to claim 1, characterized in that: An included angle α1 formed by the first rake face and a horizontal plane where the upper surface is located is 15° to 20°.

3. The thread machining insert according to claim 1, characterized in that: The horizontal edge width L1 of the first rake face is 0 mm to 0.5 mm.

4. The thread machining insert according to claim 1, characterized in that: An included angle α2 formed by the second rake face and a horizontal plane where the upper surface is located is 30° to 50°.

5. The thread machining insert according to claim 1, characterized in that: The horizontal edge width L2 of the first rake face is 0.1 mm to 0.3 mm.

6. The thread machining insert according to claim 1, characterized in that: The projection distance L3 from the arc edge to the wiper edge is 1-1.3 mm.

7. The thread machining insert according to claim 1, characterized in that: The vertical distance H1 between the bottom of the chip breaker groove and the highest point of the arc edge is 0.1 mm to 0.3 mm.

8. The thread machining insert according to claim 1, characterized in that: The chip breaker is a "V"-shaped chip breaker, which includes an inclined cylindrical surface and smooth side surfaces on both sides.

9. The thread machining insert according to claim 1, characterized in that: The inclination angle α3 of the chip breaker is 10° to 20°.

10. The thread machining insert according to claim 1, characterized in that: The blade body is a polygonal body, and a plurality of cutting units are arranged on the blade body.

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