CN222199172U

CN222199172U - Thread processing blade

Info

Publication number: CN222199172U
Application number: CN202323480504.1U
Authority: CN
Inventors: 杨俊鹏; 贺周锦; 周焱强
Original assignee: Zhuzhou Weikai Cutting Tools Co ltd
Current assignee: Zhuzhou Weikai Cutting Tools Co ltd
Priority date: 2023-12-19
Filing date: 2023-12-19
Publication date: 2024-12-20
Anticipated expiration: 2033-12-19

Abstract

The utility model discloses a thread processing blade, wherein a protruding cutting unit is provided at the top corner of the blade body, wherein the cutting unit comprises an arc edge, a cutting edge, a finishing edge and a chip breaker groove, wherein the cutting unit extends along the arc edge and the cutting edge toward the blade body to form a first rake face, a second rake face and a chip breaker platform, wherein the second rake face and the chip breaker platform form a chip breaker groove. The cutting unit of the utility model adopts a double large rake angle structure, which perfectly balances the sharpness of the blade and the strength of the blade, and the wider chip breaker groove fully guarantees the chip deformation space, reduces the tool wear or chipping phenomenon, and solves the problem of insufficient control of thread tooth profile accuracy caused by blade problems in the existing thread processing blade during processing.

Description

Thread processing blade

Technical Field

The utility model relates to the technical field of thread machining equipment, in particular to a thread machining blade.

Background

Threads are one of the common geometric features in mechanical engineering and are widely used. In the thread machining process, along with continuous feeding of the cutting unit, the cutting amount is gradually increased, chips are extruded to two sides to form, and the chips enter the chip flute to deform and curl so as not to be easily broken, so that the surface quality of a machined workpiece is affected by the winding chips.

In the blade disclosed by the indexable threaded blade of CN202020326225.7, a blade body is provided with a center hole, three cutting edges are uniformly arranged on the blade body, each cutting edge comprises a blade cutting workpiece side and a blade cutting workpiece side, the joint of the blade cutting workpiece side and the blade cutting workpiece side is set to be a cutting tip, a chip breaking groove is formed in the inner side of the cutting tip, a first chip breaking boss and a second chip breaking boss are sequentially formed in the inner side of the chip breaking groove, the first chip breaking boss is smaller than the second chip breaking boss, and a chip guiding groove is formed in the periphery of the second chip breaking boss. This patent is in time discharged in order to the piece that the cutting in-process produced, through setting up broken bits recess, first broken bits boss, second broken bits boss and guide the bits groove, the setting up of broken bits recess has increased the blade and has cut out work piece side and hold the bits space, reduces the chip and cuts out the frictional resistance of work piece side at the blade, has increased the heat dissipation space, and the cutting fluid can fully get into the recess region and cool off and lubricate. The first chip breaking boss close to the cutting tip position can ensure that the cutter body can effectively break chips when the cutting depth is smaller, and can pick up chips in time and promote the chips to curl and reduce the curvature radius when the cutting depth is larger. With the increase of the cutting depth, the cutting chips generated by cutting become thin and wide, when the thin and wide cutting chips flow to the side of a workpiece cut by the blade from the cutting tip, certain curling can be generated through the pickup of the first chip breaking boss and the cutting chips continue to move backwards, when the second chip breaking boss is reached, the cutting chips are blocked to generate secondary curling, the curvature radius is further reduced, and therefore the cutting chips are smoothly discharged, the cutting chips are prevented from winding the workpiece or scraping the workpiece, and the thread processing quality is improved. However, the blade structure of the patent mainly focuses on the influence of chips on a machined workpiece in the machining process, the aspects of blade edge strength and the like are not considered, in the thread turning process, the tool is frequently required to be reloaded for tool setting due to abrasion and tool breakage of a thread tool, the precision of the thread turning is directly influenced by the tool setting and tool setting, and particularly, the abnormality is obvious in the high-precision thread machining.

Disclosure of utility model

The utility model aims to solve the technical problem that the quality problem of thread teeth is easy to cause due to the problem of blades in the existing thread processing blade process, and provides a thread processing blade.

The aim of the utility model is realized by the following technical scheme:

The utility model provides a screw thread processing blade, includes the blade body, the geometric center of blade body is equipped with the locating hole, and the apex angle department of blade body is equipped with convex cutting unit, cutting unit includes circular arc sword, cutting sword, coping sword and chip breaking groove.

The blade body comprises an upper surface, a lower surface and a plurality of side surfaces and arc surfaces at the vertex angle, wherein the side surfaces are used for connecting the upper surface and the lower surface, the arc surfaces are intersected with the upper surface and/or the lower surface to form an arc edge, the side surfaces at two sides of the arc surface are intersected with the upper surface and/or the lower surface to form a cutting edge, the side surfaces adjacent to the cutting edge are intersected with the upper surface and/or the lower surface to form a trimming edge, and the angle between the trimming edge and the cutting edge is 15-20 degrees.

The cutting unit extends to the blade body along the arc edge and the cutting edge to form a rake face with a certain edge inclination angle, the rake face comprises a first rake face and a second rake face, and the second rake face and the chip breaker form a chip breaker groove.

Further, an included angle alpha 1 formed by the first rake face and a horizontal plane where the upper surface is located is 15-20 degrees. Preferably, the included angle α1 formed by the first rake surface and the horizontal plane where the upper surface is located is 16.5 °.

Further, the horizontal cutting edge width L1 of the first front cutter face is 0 mm-0.5 mm. Preferably, the horizontal margin L1 of the first rake surface is 0.3mm.

Further, an included angle alpha 2 formed by the second rake face and the horizontal plane where the upper surface is located is 30-50 degrees. Preferably, the included angle α2 formed by the second rake surface and the horizontal plane where the upper surface is located is 41 °.

Further, the horizontal cutting edge width L2 of the first front cutter face is 0.1 mm-0.3 mm. Preferably, the horizontal margin L2 of the first rake surface is 0.2mm.

Further, the projection distance from the arc blade to the trimming blade is L3 and is 1-1.3 mm.

Further, the vertical distance H1 between the bottom of the chip breaker groove and the highest point of the arc blade is 0.1 mm-0.3 mm. Preferably, the vertical distance H1 between the bottom of the chip breaker groove and the highest point of the circular arc blade is 0.22mm.

Further, the chip breaker is a V-shaped chip breaker and comprises an inclined cylindrical surface and smooth side surfaces at two sides which are connected.

Further, the inclination angle of the chip breaker is alpha 3 and is 10-20 degrees. Preferably, the chip breaker has an angle of inclination α3 of 16 °.

Further, the blade body is a polygonal body, and a plurality of cutting units are arranged on the blade body.

Compared with the prior art, the beneficial effects are that:

The cutting unit adopts a double rake angle structure, and the sharpness of the blade is fully ensured and certain strength is considered through the blade inclination angle design of the first rake face and the second rake face. The second rake face and the chip breaker form a chip breaker groove, chips are generated and curled in the chip breaker groove, in the continuous machining process, the chips are continuously generated and move backwards, and under the guidance of the V-shaped chip breaker, the chips are turned over again, so that the curling radius generated by the chips can be reduced in a short time, the formation and the flow direction of the chips are improved, the surface finish of a machined part is ensured, and the production efficiency is improved. According to the utility model, through the balanced design of the blade edge structure, the cutting edge of the chip cutting unit is rounded, and the reasonable collocation of the chip cutting structure is combined, so that the service life of the blade is prolonged, and the production cost is reduced.

Drawings

FIG. 1 is a perspective view of a threading insert of embodiment 1;

FIG. 2 is a top view of a threading insert;

FIG. 3 is an enlarged view of a portion of the outwardly projecting cutting unit at the top corner of the blade body;

FIG. 4 is a partial cross-sectional view of the blade shown in FIG. 2;

The novel cutting tool comprises a 1-blade body, a 2-blade side surface, a 3-cutting unit, a 4 upper surface, a 5 lower surface, a 6 circular arc blade, a 7-cutting blade I, a 8-cutting blade II, a 9-chip breaker, a 10-second front tool face, a 11-first front tool face, a 12-trimming blade and a 20-positioning hole.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear) are involved in the embodiment of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed. If there is a description of "first", "second", etc. in an embodiment of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

In the description of the present utility model, unless explicitly stated or limited otherwise, the terms "mounted," "configured to," "connected," and the like are to be construed broadly as, for example, "connected" may be fixedly connected, may be detachably connected, or integrally connected, may be mechanically connected or electrically connected, may be directly connected or indirectly connected through an intermediate medium, and may be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Example 1

The embodiment provides a thread processing blade, including blade body 1, the geometric center of blade body 1 is equipped with locating hole 20, and the apex angle department of blade body 1 is equipped with convex cutting unit 3, cutting unit 3 includes circular arc sword 6, cutting sword, sleeking sword 12 and chip breaker.

The blade body 1 comprises an upper surface 4, a lower surface 5 and a plurality of side surfaces for connecting the upper surface 4 and the lower surface 5, the tip of the cutting unit 3 is an arc surface, the arc surface is intersected with the upper surface 4 to form an arc edge 6, two sides of the arc surface are perpendicular blade side surfaces 2, the blade side surfaces 2 are intersected with the upper surface 4 to form a first cutting edge 7 and a second cutting edge 8 respectively, the side surfaces adjacent to the first cutting edge 7 and the second cutting edge 8 are intersected with the upper surface 4 to form a trimming edge 12, and the angle between the trimming edge 12 and the cutting edge is 15-20 degrees.

The cutting unit 3 extends along the arc edge 6 and the cutting edge to the blade body 1 to form a rake face, the rake face has a certain inclination angle, and the cutting edge forms a certain edge inclination angle. The rake surface comprises a first rake surface 11, a second rake surface 10, the second rake surface 10 intersecting the chip breaker 9, and the second rake surface 10 and the chip breaker 9 forming a chip breaker. The center lines of the two edge cutting edges are in a symmetrical structure, and the arc edge 6, the first front tool face 11, the second front tool face 10 and the chip breaker 9 are sequentially arranged along the center lines.

Example 2

The embodiment provides a thread processing blade, includes the blade body 1 of type triangle, the geometric center of blade body 1 is equipped with locating hole 20, and the three apex angle departments of blade body 1 all are equipped with a transection plane, and the transection plane is equipped with convex cutting unit 3, cutting unit 3 includes circular arc sword 6, cutting sword, coping sword 12 and chip breaker.

The blade body 1 comprises an upper surface 4, a lower surface 5 and a plurality of side surfaces for connecting the upper surface 4 and the lower surface 5, the tip of the cutting unit 3 is an arc surface, the arc surface is intersected with the upper surface 4 and the lower surface 5 to form an arc edge 6, two sides of the arc surface are perpendicular blade side surfaces 2, the blade side surfaces 2 are intersected with the upper surface 4 and the lower surface 5 to respectively form a cutting edge 7 and a cutting edge 8, the side surfaces adjacent to the cutting edge 7 and the cutting edge 8 are intersected with the upper surface 4 to form a trimming edge 12, the cutting edge and the trimming edge 12 are connected through the arc edge, and the angle between the trimming edge 12 and the cutting edge is 15-20 degrees.

Example 3

The blade body 1 comprises an upper surface 4, a lower surface 5 and a plurality of side surfaces for connecting the upper surface 4 and the lower surface 5, the tip of the cutting unit 3 is an arc surface, the arc surface is intersected with the upper surface 4 and the lower surface 5 to form an arc edge 6, two sides of the arc surface are perpendicular blade side surfaces 2, the blade side surfaces 2 are intersected with the upper surface 4 and the lower surface 5 to respectively form a cutting edge I7 and a cutting edge II 8, a certain edge inclination angle is formed, the side surfaces adjacent to the cutting edge I7 and the cutting edge II 8 are intersected with the upper surface 4 to form a trimming edge 12, the cutting edge and the trimming edge 12 are connected through the arc edge, and the angle between the trimming edge 12 and the cutting edge is 15-20 degrees.

The cutting unit 3 extends to the blade body 1 along the arc edge 6 and the cutting edge to form a first rake face 11 and a second rake face 10, an included angle alpha 1 formed by the first rake face 11 and a horizontal plane where the upper surface 4 is located is 15-20 degrees, and an included angle alpha 2 formed by the second rake face 10 and the horizontal plane where the upper surface 4 is located is 30-50 degrees. The second rake surface 10 intersects the chip breaker 9, and the second rake surface 10 and the chip breaker 9 form a chip breaker. The center lines of the two edge cutting edges are in a symmetrical structure, and the arc edge 6, the first front tool face 11, the second front tool face 10 and the chip breaker 9 are sequentially arranged along the center lines.

Example 4

The cutting unit 3 extends to the blade body 1 along the arc edge 6 and the cutting edge to form a first rake face 11 and a second rake face 10, an included angle alpha 1 formed by the first rake face 11 and a horizontal plane where the upper surface 4 is located is 15-20 degrees, the horizontal cutting edge width L1 of the first rake face 11 is 0 mm-0.5 mm, an included angle alpha 2 formed by the second rake face 10 and the horizontal plane where the upper surface 4 is located is 30-50 degrees, and the horizontal cutting edge width L2 of the second rake face 10 is 0.1 mm-0.3 mm. The second rake surface 10 intersects the chip breaker 9, and the second rake surface 10 and the chip breaker 9 form a chip breaker. The center lines of the two edge cutting edges are in a symmetrical structure, and the arc edge 6, the first front tool face 11, the second front tool face 10 and the chip breaker 9 are sequentially arranged along the center lines.

Example 5

The blade body 1 comprises an upper surface 4, a lower surface 5 and a plurality of side surfaces for connecting the upper surface 4 and the lower surface 5, the tip of the cutting unit 3 is an arc surface, the arc surface is intersected with the upper surface 4 and the lower surface 5 to form an arc blade 6, two sides of the arc surface are perpendicular blade side surfaces 2, the blade side surfaces 2 are intersected with the upper surface 4 and the lower surface 5 to respectively form a cutting blade I7 and a cutting blade II 8, a certain blade inclination angle is formed, the side surfaces adjacent to the cutting blade I7 and the cutting blade II 8 are intersected with the upper surface 4 to form a trimming blade 12, the cutting blade and the trimming blade 12 are connected through the arc edge, the angle between the trimming blade 12 and the cutting blade is 15-20 degrees, and the projection distance between the arc blade 6 and the trimming blade 12 is L3-1.3 mm.

The cutting unit 3 extends to the blade body 1 along the arc edge 6 and the cutting edge to form a first rake face 11 and a second rake face 10, an included angle alpha 1 formed by the first rake face 11 and a horizontal plane where the upper surface 4 is located is 15-20 degrees, the horizontal cutting edge width L1 of the first rake face 11 is 0 mm-0.5 mm, an included angle alpha 2 formed by the second rake face 10 and the horizontal plane where the upper surface 4 is located is 30-50 degrees, and the horizontal cutting edge width L2 of the second rake face 10 is 0.1 mm-0.3 mm. The second rake surface 10 is intersected with the chip breaker 9, the inclination angle of the chip breaker 9 is 10-20 degrees, the chip breaker is formed by the second rake surface 10 and the chip breaker 9, and the vertical distance H1 between the bottom of the chip breaker and the highest point of the circular arc blade 6 is 0.1-0.3 mm. The center lines of the two edge cutting edges are in a symmetrical structure, and the arc edge 6, the first front tool face 11, the second front tool face 10 and the chip breaker 9 are sequentially arranged along the center lines.

Example 6

The embodiment provides a thread processing blade, as shown in fig. 1, including a blade body 1 of similar triangular body, the geometric center of blade body 1 is equipped with locating hole 20, and the three apex angle departments of blade body 1 all are equipped with a transversal cutting plane, and the transversal cutting plane is equipped with convex cutting unit 3, cutting unit 3 includes circular arc sword 6, cutting sword, wiper sword 12 and chip breaker.

The cutting unit 3 extends to the blade body 1 along the arc edge 6 and the cutting edge to form a first rake face 11 and a second rake face 10, an included angle alpha 1 formed by the first rake face 11 and the horizontal plane where the upper surface 4 is positioned is 16.5 degrees, the horizontal cutting edge width L1 of the first rake face 11 is 0.3mm, an included angle alpha 2 formed by the second rake face 10 and the horizontal plane where the upper surface 4 is positioned is 41 degrees, and the horizontal cutting edge width L2 of the second rake face 10 is 0.2mm. The second rake surface 10 is intersected with the chip breaker 9, the chip breaker 9 is a V-shaped chip breaker 9, the V-shaped bottom of the chip breaker 9 faces the circular arc edge 6 and comprises an inclined cylindrical surface and smooth side surfaces on two sides, and the inclined angle of the chip breaker 9 is alpha 3 and 16 degrees. The second rake surface 10 and the chip breaker 9 form a chip breaker, the vertical distance H1 of the chip breaker bottom from the highest point of the circular arc edge 6 being 0.22mm. The cutting unit 3 has a symmetrical structure about the center line of the two edge cutting edges, and is sequentially provided with an arc edge 6, a first rake surface 11, a second rake surface 10 and a chip breaker 9 along the center line.

It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. The thread processing blade is characterized by comprising a blade body, wherein a positioning hole is formed in the geometric center of the blade body, a convex cutting unit is arranged at the vertex angle of the blade body, and the cutting unit comprises an arc blade, a cutting blade, a trimming blade and a chip breaking groove;

The blade body comprises an upper surface, a lower surface and a plurality of side surfaces and arc surfaces at the vertex angles, wherein the side surfaces are used for connecting the upper surface and the lower surface, the arc surfaces are intersected with the upper surface and/or the lower surface to form arc edges, the side surfaces on two sides of the arc surfaces are intersected with the upper surface and/or the lower surface to form cutting edges, the side surfaces adjacent to the cutting edges are intersected with the upper surface and/or the lower surface to form trimming edges, and the angle between the trimming edges and the cutting edges is 15-20 degrees;

2. The threading insert of claim 1 wherein the first rake surface forms an angle α1 with the horizontal plane at which the upper surface is located of 15 ° to 20 °.

3. The threading insert of claim 1 wherein the horizontal margin L1 of the first rake surface is 0mm to 0.5mm.

4. The threading insert of claim 1 wherein the second rake surface forms an angle α2 with the horizontal plane at which the upper surface is located of 30 ° to 50 °.

5. The threading blade of claim 1 wherein the horizontal margin L2 of the first rake surface is 0.1mm to 0.3mm.

6. The threading insert of claim 1 wherein the projected distance of the rounded edge to the wiper edge is L3 is 1 to 1.3mm.

7. The threading insert of claim 1 wherein the vertical distance H1 of the chip breaker groove bottom from the highest point of the circular arc edge is 0.1mm to 0.3mm.

8. The threading insert of claim 1 wherein the chipbreaker is a "V" shaped chipbreaker comprising a beveled cylindrical surface and smooth side surfaces on both sides.

9. The threading insert of claim 1 wherein the chip breaker has an angle of inclination α3 of 10 ° to 20 °.

10. The threading insert of claim 1 wherein the insert body is a polygonal body having a plurality of cutting elements disposed thereon.