CN212168981U

CN212168981U - Thread blade

Info

Publication number: CN212168981U
Application number: CN201922395454.4U
Authority: CN
Inventors: 宋吉; 刘威; 胡东雨
Original assignee: Taizhou Ruian Cemented Carbide Tools Co ltd
Current assignee: Taizhou Ruian Cemented Carbide Tools Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-12-18
Anticipated expiration: 2029-12-27

Abstract

The utility model provides a thread cutting blade belongs to cutting blade technical field. It has solved the not good problem that collapses the sword easily of current threading blade radiating effect. The utility model provides a thread cutting blade, includes the blade body, is equipped with centre bore, cutting edge portion on the blade body, and cutting edge portion is enclosed by rake face, sword angle arc surface and two sword angle sides, and the crossing cutting angle sword that forms of sword angle arc surface and rake face, two sword angle sides intersect with the rake face and form two side cutting edges, are equipped with convex chip breaking boss on the rake face, and the chip breaking boss is arc cusp and chip breaking boss towards the sword angle arc surface. The threading blade has the advantages of better chip removal and higher heat dissipation efficiency during machining.

Description

Thread blade

Technical Field

The utility model belongs to the technical field of the cutting blade, a threading blade is related to.

Background

The thread turning is special, cutting edges on two sides of a cutting edge angle participate in cutting at the same time in the thread turning process, the feeding amount is large, chips become wider and wider along with the increase of the cutting times, the chips are difficult to break and are easy to wind on a workpiece, a cutter and a clamp; the tool point angle of the thread processing blade is small, the strength is low, and chips wound on a workpiece and rotating at a high speed along with the workpiece are easy to hit the blade to cause blade tipping; the chips entangled with the workpiece also cause a reduction in the thread finish of the workpiece, and the entangled chips are also prone to danger to the operator.

An indexable threading insert (application number: 201821468458.X) as disclosed in chinese patent document comprises an insert main body provided with a center hole, a rake surface and a chip guide table provided on the rake surface; the front cutter face is connected with the upper surface of the cutter blade main body through a connecting curved surface, a V-shaped thread cutting edge consisting of a pair of cutting edges and a finishing edge connected with at least one end of the V-shaped thread cutting edge are formed at the edge part of the outer side of the front cutter face, and an angle formed by the V-shaped thread cutting edge is a cutting edge angle; the rake face inclines inwards and downwards in the feeding direction, the included angle between the rake face in the feeding direction and the horizontal plane is lambda, the rake face inclines inwards and downwards in the cutting direction, and the included angle between the rake face in the cutting direction and the horizontal plane is gamma; lead the bits platform including leading the bits arch with lead the bits recess, the rake face plays inside downward sloping from outside limit arris portion and forms and lead the bits recess, lead the bits recess and extend to connecting curved surface and form lead the bits arch, lead the protruding inside one side connection curved surface of bits. But the indexable thread processing blade has poor blocking effect on scrap iron generated by processing, is not easy to cut and remove chips, has poor heat dissipation effect and is easy to tip.

Disclosure of Invention

The utility model aims at solving the problems in the prior art, and provides a threading blade which can better remove chips and has higher heat dissipation efficiency during processing.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a thread cutting blade, includes the blade body, the blade body on be equipped with centre bore, cutting edge portion enclose by rake face, sword angle arc surface and two sword angle sides, sword angle arc surface intersect with the rake face and form the cutting angle sword, two sword angle sides intersect with the rake face and form two side cutting edges, its characterized in that, the rake face on be equipped with convex chip breaking boss, chip breaking boss be arc point shape just chip breaking boss towards the sword angle arc surface.

The chip breaking boss is arc-pointed and faces the blade angle arc surface, so that scrap iron generated by the blade angle arc surface is blocked, lifted and curled, and a better chip removal effect is achieved.

In the above threading insert, the chip-breaking bosses are symmetrically provided with tooth-side chip-breaking bosses at both sides, the tooth-side chip-breaking bosses are in a sharp-angled shape, and the sharp-angled corners of the tooth-side chip-breaking bosses face the corresponding side cutting edges. Through setting up foretell flank chip breaking boss, can lift and curl the iron fillings that the cutting of offside cutting edge produced, further improve the chip removal effect.

In foretell threading blade, the both sides of chip breaking boss personally submit the arcwall face, two crest lines of chip breaking boss upper end be the arc line, two the arc line all from top to bottom crooked and intersect on the rake face. The arc-shaped surfaces are formed on the two side surfaces of the chip breaking boss, so that cutting of the side cutting edge can be effectively blocked, the cutting curling radius is changed, the cutting is enabled to curl and discharge, and the chip removal effect is improved.

In the threading blade, one side of the chip breaking boss is provided with a convex trimming edge boss, the outer side wall of the trimming edge boss is an arc-shaped surface, and the trimming edge boss and the chip breaking boss are in arc transition. Through setting up above-mentioned smoothing sword boss, make this blade have good intensity and sharpness, make the screw thread work piece of processing have good smooth finish, improved the life of blade simultaneously.

In the thread insert, the rake face is arranged obliquely upwards, the included angle between the rake face and the horizontal plane is a, and a is not less than 7.5 degrees and not more than 22.5 degrees.

In the thread insert, the bottom of each of the two sides of the chip breaking boss is provided with a first tooth-side chip breaking boss and a second tooth-side chip breaking boss, the first tooth-side chip breaking boss is located at the top ends of the second tooth-side chip breaking boss and the chip breaking boss, and the distance from the first tooth-side chip breaking boss to the corresponding side cutting edge is greater than the distance from the second tooth-side chip breaking boss to the corresponding side cutting edge. Through setting up foretell tooth side chip breaking boss one and tooth side chip breaking boss two, the cutting that the corresponding side cutting edge of guide in time produced flows and curls, reduces the impact and the friction of cutting and blade, has improved the radiating efficiency.

In the threading insert, the distance between the top end of the first tooth side chip breaking boss and the corresponding side cutting edge is L1 and is more than or equal to 0.3mm and less than or equal to L1 and less than or equal to 0.9 mm.

In the above threading insert, the distance between the tip of the first tooth-side chip breaker boss and the corresponding side cutting edge is L1, and L1 is 0.5 mm.

In the threading insert, the distance between the top end of the second tooth side chip breaking boss and the corresponding side cutting edge is L2 and is more than or equal to 0.2mm and less than or equal to L2 and less than or equal to 0.7 mm.

In the above threading insert, the distance between the tip of the second tooth chip breaking land and the corresponding side cutting edge is L2, and L2 is 0.35 mm.

In the threading insert, the distance from the cutting corner edge to the outer end of the chip breaking boss is L3, and L3 is not less than 1.2mm and not more than 2.5 mm.

In the threading insert of the above type, the distance from the cutting corner edge to the outer end of the chip breaker boss is L3, and L3 is 1.8 mm.

Compared with the prior art, this screw thread blade has following advantage:

1. the chip breaking boss is arc-pointed and faces to the blade angle arc surface, and blocks scrap iron generated by the blade angle arc surface, so that the scrap iron is lifted and curled, and a better chip removal effect is achieved;

2. the tooth side chip breaking boss is in a sharp-angled shape, and the sharp angle of the tooth side chip breaking boss faces to the corresponding side cutting edge, so that scrap iron generated by cutting the side cutting edge can be lifted and curled, and the chip removal effect is further improved;

3. the arc-shaped surfaces are formed on the two side surfaces of the chip breaking boss, so that cutting of the side cutting edge can be effectively blocked, the cutting curling radius is changed, the cutting is enabled to curl and discharge, and the chip removal effect is improved.

Drawings

Fig. 1 is a front view schematically showing the threading insert of the present invention.

Fig. 2 is a schematic sectional view a-a of fig. 1.

Fig. 3 is a partially enlarged schematic view B of fig. 1.

In the figure, 1, a blade body; 2. a central bore; 3. a cutting edge part; 4. a rake face; 5. A cutting corner edge; 6. a side cutting edge; 7. a chip breaking boss; 8. a tooth side chip breaking boss; 8a, a first tooth side chip breaking boss; 8b, a second tooth-side chip breaking boss; 9. and (4) smoothing the lug bosses of the cutting edges.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 3, a threading insert comprises an insert body 1, wherein a central hole 2 and a cutting edge part 3 are arranged on the insert body 1, the cutting edge part 3 is defined by a front face 4, an edge angle arc surface and two edge angle side faces, the edge angle arc surface intersects with the front face 4 to form a cutting edge 5, the two edge angle side faces intersect with the front face 4 to form two side cutting edges 6, and the threading insert is characterized in that a convex chip breaking boss 7 is arranged on the front face 4, the chip breaking boss 7 is arc-shaped, and the chip breaking boss 7 faces the edge angle arc surface.

The two sides of the chip breaking boss 7 are symmetrically provided with tooth side chip breaking bosses 8, the tooth side chip breaking bosses 8 are in a sharp-angled shape, and the sharp angles of the tooth side chip breaking bosses 8 face the corresponding side cutting edges 6. Arc-shaped surfaces are formed on two sides of the chip breaking boss 7, two ridge lines at the upper end of the chip breaking boss 7 are arc-shaped lines, and the two arc-shaped lines are bent from top to bottom and intersect on the front cutter face 4.

One side of chip breaking boss 7 is equipped with convex sleeking sword boss 9, and the lateral wall of sleeking sword boss 9 is the arcwall face, is the circular arc transition between sleeking sword boss 9 and the chip breaking boss 7.

The rake face 4 is arranged obliquely upwards, the included angle between the rake face 4 and the horizontal plane is a, and a is more than or equal to 7.5 degrees and less than or equal to 22.5 degrees. Preferably, the rake face 4 is disposed obliquely upward and the rake face 4 forms an angle a of 10 ° or 15 ° with the horizontal plane.

The bottom of the two sides of the chip breaking boss 7 is provided with a first tooth-side chip breaking boss 8a and a second tooth-side chip breaking boss 8b, the first tooth-side chip breaking boss 8a is located at the top ends of the second tooth-side chip breaking boss 8b and the chip breaking boss 7, and the distance from the first tooth-side chip breaking boss 8a to the corresponding side cutting edge 6 is greater than the distance from the second tooth-side chip breaking boss 8b to the corresponding side cutting edge 6. The distance between the top end of the tooth side chip-breaking boss I8 a and the corresponding side cutting edge 6 is L1, and L1 is more than or equal to 0.3mm and less than or equal to 0.9 mm. Preferably, the distance between the tip of the tooth-side chip breaker boss one 8a and the corresponding side cutting edge 6 is L1, and L1 is 0.5 mm.

The distance between the top end of the tooth side chip-breaking boss II 8b and the corresponding side cutting edge 6 is L2, and L2 is more than or equal to 0.2mm and less than or equal to 0.7 mm. Preferably, the distance between the tip of the tooth-side chip breaker boss two 8b and the corresponding side cutting edge 6 is L2, and L2 is 0.35 mm.

The distance from the cutting corner edge 5 to the outer end of the chip breaking boss 7 is L3, and L3 is more than or equal to 1.2mm and less than or equal to 2.5 mm. Preferably, the distance from the cutting corner edge 5 to the outer end of the chip breaker boss 7 is L3, and L3 is 1.8 mm.

Chip-breaking boss 7 is the arc point shape and towards the sword angle arc surface, blocks and makes iron fillings lift and curl to the iron fillings that the sword angle arc surface biography produced, has better chip removal effect, and the arcwall face is personally submitted to the both sides of chip-breaking boss 7, can effectually block to the cutting of side cutting edge 6, changes the radius of curling of cutting, makes the cutting take place to curl and discharge, has improved the effect of chip removal. Through the first tooth-side chip breaking boss 8a and the second tooth-side chip breaking boss 8b, cutting flow and curling generated by the corresponding side cutting edge 6 can be effectively guided in time, impact and friction between cutting and a blade are reduced, and heat dissipation efficiency is improved. The edge trimming boss 9 enables the blade to have good strength and sharpness, enables a processed threaded workpiece to have good finish, and meanwhile prolongs the service life of the blade.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although terms such as the insert body 1, the center hole 2, the cutting edge portion 3, the rake face 4, the cutting corner edge 5, the side cutting edge 6, the chip breaking land 7, the tooth side chip breaking land 8, the tooth side chip breaking land one 8a, the tooth side chip breaking land two 8b, the wiper land 9, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The utility model provides a thread cutting blade, includes blade body (1), blade body (1) on be equipped with centre bore (2), cutting edge portion (3) enclose by rake face (4), sword angle arc surface and two sword angle sides, sword angle arc surface and rake face (4) intersect and form cutting angle sword (5), two sword angle sides and rake face (4) intersect and form two side cutting sword (6), its characterized in that, rake face (4) on be equipped with convex chip breaking boss (7), chip breaking boss (7) be the arc point shape just chip breaking boss (7) towards the sword angle arc surface.

2. A threading insert according to claim 1, characterized in that the chip-breaking projections (7) are bilaterally symmetrical with respect to each other with a flank chip-breaking projection (8), the flank chip-breaking projections (8) being pointed and the points of the flank chip-breaking projections (8) facing the respective flank cutting edge (6).

3. A threading insert according to claim 1, characterized in that the two sides of the chip breaker (7) are arc-shaped, the two ridges at the upper end of the chip breaker (7) are arc-shaped, and the two arc-shaped lines are both curved from top to bottom and intersect on the rake face (4).

4. A threading insert according to claim 1, 2 or 3, characterized in that a convex wiper nose (9) is provided on one side of the chip breaking nose (7), the outer side wall of the wiper nose (9) is an arc-shaped surface, and the wiper nose (9) and the chip breaking nose (7) are in arc transition.

5. A threading insert according to claim 1, 2 or 3, characterized in that the rake surface (4) is arranged obliquely upwards and that the rake surface (4) forms an angle a of 7.5 ° ≦ a ≦ 22.5 ° with the horizontal plane.

6. A threading insert according to claim 2, characterized in that said flank chip breaking land (8) comprises a first flank chip breaking land (8a) and a second flank chip breaking land (8b) provided at the bottom of both sides of said chip breaking land (7), said first flank chip breaking land (8a) being located at the top of said second flank chip breaking land (8b) and chip breaking land (7), the distance from said first flank chip breaking land (8a) to the corresponding side cutting edge (6) being greater than the distance from said second flank chip breaking land (8b) to the corresponding side cutting edge (6).

7. A threading insert according to claim 6, characterized in that the distance between the tip of the tooth flank chip breaking projection I (8a) and the corresponding flank cutting edge (6) is L1 and 0.3mm L1 mm 0.9 mm.

8. A threading insert according to claim 6, characterized in that the distance between the tip of the first tooth flank chip breaking projection (8a) and the corresponding side cutting edge (6) is L1 and L1-0.5 mm.

9. A threading insert according to claim 6, characterized in that the distance between the tip of the tooth flank chip breaking land two (8b) and the corresponding flank cutting edge (6) is L2 and 0.2mm L2 mm 0.7 mm.

10. A threading insert according to claim 1, characterized in that the distance from the cutting corner edge (5) to the outer end of the chip breaking land (7) is L3 and 1.2mm L3 mm 2.5 mm.