CN211387046U

CN211387046U - Step three-edge forming reamer

Info

Publication number: CN211387046U
Application number: CN201922320464.1U
Authority: CN
Inventors: 王明坤
Original assignee: Changzhou Lead Cutting Technology Co ltd
Current assignee: Changzhou Lead Cutting Technology Co ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-09-01
Anticipated expiration: 2029-12-23

Abstract

The utility model discloses a three sword shaping reamer of ladder belongs to spot facing work cutter field. The utility model discloses a three sword shaping reamer of ladder, including handle of a knife and cutting portion, the cutting portion includes the cutting edge of three circumference partition, has the linear type chip groove between two adjacent cutting edges, and the cutting edge has 3 ~ 5 steps, all has the terminal surface blade that is located the shaping blade of one side and is located the front end on every cutting edge, and the anterior angle of shaping blade is 0, and the center of handle of a knife and cutting portion is equipped with the coolant liquid passageway, all is equipped with the hydrojet in the three linear type chip groove. The utility model adopts the three-blade ladder design, ensures the one-step forming of the forming hole, has better concentricity of the formed ladder hole after processing and higher surface smoothness of the forming hole, adopts the linear chip removal groove, has large chip containing space and easy chip removal; in addition, the front angle of the forming cutting edge of the cutting edge is 0 degree, and the design of single straight hole split-flow cooling is adopted, so that the service life and the cutting efficiency of the stepped three-edge forming reamer are improved.

Description

Step three-edge forming reamer

Technical Field

The utility model relates to a cutter is used in spot facing work, more specifically says, relates to a three sword shaping reamer of ladder.

Background

With the rapid development of machining technology, users have made higher demands on the machining quality, the machining reliability, the machining efficiency and the like of products. In the processing of hole, often meet the shoulder hole, for example, the hydrovalve owner hole, it is formed by several different punch combinations, every shoulder hole not only has the required precision of diameter, and the degree of depth of every grade shoulder hole also has the required precision of length, general hole machining cutter is difficult to rapid tooling, generally need divide the drilling many times, reaming and shaping hole etc. complex operation, not only the speed of processing the work piece is slow, still additionally increased workman's work load, can't satisfy the high-efficient accurate demand of work piece processing in the modern production, can't guarantee the precision of the length of shoulder hole and diameter simultaneously.

Aiming at the processing of a stepped hole, a stepped reamer is provided at present, for example, the Chinese patent number ZL201510053516.7, the granted announcement date is 7 months and 27 days in 2018, and the invention and creation name is as follows: multi-step shaping reamer, this application relates to a multi-step shaping reamer, and it includes: the cutter comprises a cutter body and a cutter head formed at one end of the cutter body; the end part of the tool bit is provided with a first cutting edge, the tool bit is also provided with a plurality of reaming parts, the diameter of the reaming part far away from the first cutting edge in the adjacent reaming parts is larger than that of the reaming part close to the first cutting edge, the tool bit is also provided with a chip groove, the chip groove extends from one end to the other end of the tool bit, the edge of the chip groove forms a second cutting edge of the tool bit, and the second cutting edge is formed on the side surface of the tool bit; the core thickness of the cutter head is 0.65:10 or 1.0: 10; the wall surface of the tool bit, which is contacted with the hole wall of the machined stepped hole, forms a forming surface of the tool bit. The application can meet the processing requirements of the hydraulic valve body hole, can process and form the corresponding stepped hole at the position at one time, and is high in processing efficiency and processing precision.

Because the multi-step forming reamer has the advantages that the cutting force is large when the stepped hole is formed at one time, the cooling and chip removal design of the reamer directly influences the service life and the processing efficiency of the reamer, so that the service life of the reamer is short, the processing speed is low, and the processing cost is relatively high.

Disclosure of Invention

1. Technical problem to be solved by the utility model

The utility model aims to overcome the defects of the prior stepped hole expanding cutter that the service life is lower, the processing speed is lower and the like, and provides a stepped three-edge forming expanding cutter, which adopts the design of three-edge steps to ensure the one-step forming of a formed hole, the concentricity of the formed stepped hole after processing is better, the surface smoothness of the formed hole is higher, and meanwhile, a linear chip removal groove is formed between three groups of cutting edges, the chip containing space is large, and the chip removal is easier; in addition, the front angle of the forming cutting edge of the cutting edge is 0 degree, and the design of single straight hole split-flow cooling is adopted, so that the service life and the cutting efficiency of the stepped three-edge forming reamer are improved.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a three sword shaping reamer of ladder, include the handle of a knife and the cutting part of locating the handle of a knife front end, the cutting part include the cutting edge of three circumference partition, linear type chip groove has between two adjacent cutting edges, the cutting edge 3 ~ 5 steps have, and the step diameter is by preceding increase in order backward, all have the shaping blade that is located one side and the terminal surface blade that is located the front end on every cutting edge, the anterior angle of shaping blade be 0, the center of handle of a knife and cutting part be equipped with the coolant liquid passageway, all be equipped with the hydrojet that is linked together with the coolant liquid passageway in the three linear type chip groove.

Furthermore, the first back angle of the forming cutting edge is alpha 1, the second back angle is alpha 2, and alpha 1 is less than alpha 2.

Furthermore, the first back angle α 1 of the forming cutting edge is 13 ° to 17 °, and the second back angle α 2 is 23 ° to 32 °.

Furthermore, the cutting edge is provided with a first step, a second step, a third step and a fourth step from front to back in sequence, the first step and the second step are in conical surface transition, the slope of the conical surface is beta 1, the third step and the fourth step are in conical surface transition, and the slope of the conical surface is beta 2; the second step and the third step are in vertical surface transition, and a fillet transition is arranged between the second step and the vertical surface.

Further, the taper angle β 1 between the first step and the second step is 45 °, and the taper angle β 2 between the third step and the fourth step is 20 ° to 30 °.

Furthermore, the core thickness D4 of the cutting edge is 0.4-0.45 times of the diameter D2 of the second step.

Furthermore, the circle jump degree of the cutter handle is 5-8 mu m, and the circle jump degree of the cutting part is 3-5 mu m.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with existing well-known technique, have following beneficial effect:

(1) the utility model discloses a three sword shaping reamer of ladder, it adopts three sword ladder designs, has guaranteed the shaping hole one shot forming, and the concentricity of the shaping shoulder hole after the processing is better, and the surface finish of shaping hole is higher, forms linear type chip groove simultaneously between three groups of cutting edges, and the chip-containing space is big, and the chip removal is easier; in addition, the front angle of the forming cutting edge of the cutting edge is 0 degree, and a single straight hole split-flow cooling design is adopted, so that the service life and the cutting efficiency of the stepped three-edge forming reamer are improved;

(2) the utility model discloses a three sword shaping reamer of ladder, the first relief angle of its shaping blade is alpha 1, and the second relief angle is alpha 2, and alpha 1 < alpha 2, specifically, the first relief angle alpha 1 of shaping blade is 13 ~ 17, and second relief angle alpha 2 is 23 ~ 32, has strengthened the wearability of shaping blade, has improved the life of three sword shaping reamer of ladder, has improved the surface quality in processing hole simultaneously;

(3) the utility model discloses a three sword shaping reamer of ladder, its cutting edge has first step, second step, third step and fourth step in proper order from the front to the back, adopt the conical surface transition between first step and the second step, the conical surface inclination is beta 1, also adopt the conical surface transition between third step and the fourth step, the conical surface inclination is beta 2, adopt the perpendicular transition between second step and the third step, and have the fillet transition between second step and perpendicular, make the cutting more light convenient, reduced the cutting vibration;

(4) in the stepped three-edge forming reamer of the utility model, the core thickness D4 of the cutting edge is 0.4-0.45 times of the diameter D2 of the second step, so that the cutting strength of the stepped three-edge forming reamer is ensured;

(5) the utility model discloses a three sword shaping reamer of ladder, the circle of its handle of a knife is jumped the degree and is 5 ~ 8 mu m, and the circle of cutting portion is jumped the degree and is 3 ~ 5 mu m, and cutting vibration is little, has satisfied the high-efficient processing requirement of shoulder hole.

Drawings

Fig. 1 is a schematic structural view of a stepped three-blade forming reamer of the present invention;

fig. 2 is an axial view of the cutting portion of the stepped three-blade expanding cutter of the present invention.

The reference numerals in the schematic drawings illustrate:

1. a knife handle; 2. a cutting edge; 2-1, a first step; 2-2, a second step; 2-3, a third step; 2-4, a fourth step; 2-5, forming a cutting edge; 2-6, cutting edge of end face; 3. a linear chip groove; 4. a coolant passage; 4-1, and a liquid spraying port.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

Examples

As shown in fig. 1 and fig. 2, the stepped three-edge forming reamer of the embodiment includes a reamer handle 1 and a cutting part arranged at the front end of the reamer handle 1, wherein the cutting part includes three cutting edges 2 which are equally divided circumferentially, a three-edge design is adopted, so that one-step forming of a forming hole is ensured, a linear chip removal groove 3 is formed between every two adjacent cutting edges 2, a chip containing space of the linear chip removal groove 3 is large, and chip removal is easier; cutting edge 2 has 3 ~ 5 steps, and the step diameter increases progressively backward by preceding, once processes out the shoulder hole, and the concentricity of machine-shaping shoulder hole is better. Each cutting edge 2 is provided with a forming cutting edge 2-5 positioned on one side and an end face cutting edge 2-6 positioned at the front end, and the front angle of each forming cutting edge 2-5 is 0 degree, so that the strength of each forming cutting edge 2-5 is improved and the service life of the stepped three-edge forming reamer is prolonged while the smooth cutting is ensured. The coolant channel 4 is arranged at the center of the cutter handle 1 and the center of the cutting part, the liquid spraying ports 4-1 communicated with the coolant channel 4 are formed in the three linear chip grooves 3, the coolant is supplied to the liquid spraying ports 4-1 through the coolant channel 4, and the coolant is sprayed to the processing surface through the liquid spraying ports 4-1, so that the service life and the cutting efficiency of the stepped three-edge forming reamer are further prolonged, and the stepped hole is processed more efficiently.

As shown in fig. 2, the first clearance angle of the forming cutting edge 2-5 is α 1, the second clearance angle is α 2, and α 1 is less than α 2, and by adopting the design of the clearance angles, the wear resistance of the forming cutting edge 2-5 is enhanced, the service life of the stepped three-blade forming reamer is prolonged, and the surface quality of the machined hole is improved. Specifically, in the present embodiment, the first clearance angle α 1 of the forming edge 2-5 is 13 ° to 17 °, and the second clearance angle α 2 is 23 ° to 32 °. The edge widths of the forming cutting edges 2-5 and the end face cutting edges 2-6 are designed according to the processing requirements, and in the embodiment, the edge width of the forming cutting edges 2-5 is designed to be 0.25 mm-0.54 mm. Referring to fig. 1, the cutting edge 2 in this embodiment sequentially includes a first step 2-1, a second step 2-2, a third step 2-3, and a fourth step 2-4 from front to back, the first step 2-1 and the second step 2-2 are in conical surface transition, the slope of the conical surface is β 1, the third step 2-3 and the fourth step 2-4 are also in conical surface transition, and the slope of the conical surface is β 2; the second step 2-2 and the third step 2-3 are in vertical surface transition, and the second step 2-2 and the vertical surface have round corner transition. The first step 2-1 is a pre-drilled hole, the second step 2-2 is a subsequent hole expanding guide hole, and the third step 2-3 and the fourth step 2-4 are formed size holes of a processed hole. By adopting the transition design between the steps, the cutting is easier and more convenient, and the cutting vibration is reduced. Preferably, the taper slope β 1 between the first step 2-1 and the second step 2-2 is 45 °, and the taper slope β 2 between the third step 2-3 and the fourth step 2-4 is 20 ° to 30 °. The length of the first step 2-1 is L1, the diameter is D1, the length of the second step 2-2 is L2, the diameter is D2, the length of the third step 2-3 is L3, the diameter is D3, the length of the fourth step 2-4 is L4, the diameter is D4, the diameter of the tool shank 1 is D, and the length and the diameter of each step are determined according to the size requirement of a hole to be machined. The core thickness D4 of the cutting edge 2 is 0.4-0.45 times of the diameter D2 of the second step 2-2, and the cutting strength of the stepped three-edge forming reamer is guaranteed. The circle jump degree of the tool shank 1 is 5-8 mu m, the circle jump degree of the cutting part is 3-5 mu m, cutting vibration is small, and efficient machining requirements of stepped holes are met. In addition, the step three-blade forming reamer is preferably integrally processed and manufactured by hard alloy materials, and has the advantages of strong cutter integrity, high strength and long service life.

The stepped three-edge forming reamer of the utility model adopts a three-edge stepped design, ensures the roundness of the reamer and the processed hole, ensures the one-step forming of the formed hole, has better concentricity of the formed stepped hole after processing, forms linear chip grooves between three groups of cutting edges, has large chip containing space and easier chip removal; in addition, the front angle of the forming cutting edge of the cutting edge is 0 degree, and the design of single straight hole split-flow cooling is adopted, so that the service life and the cutting efficiency of the stepped three-edge forming reamer are improved.

The present invention and its embodiments have been described above schematically, and the description is not intended to be limiting, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without creatively designing the similar structural modes and embodiments to the technical solutions, they should belong to the protection scope of the present invention.

Claims

1. The utility model provides a three sword shaping reamer of ladder, includes handle of a knife (1) and locates the cutting part of handle of a knife (1) front end, its characterized in that: cutting portion include cutting edge (2) of three circumference partition, linear type chip groove (3) have between two adjacent cutting edge (2), cutting edge (2) have 3 ~ 5 steps, and the step diameter is by increasing progressively backward, all have on every cutting edge (2) and be located the terminal surface blade (2-6) of front end that are located the shaping blade (2-5) of one side, the anterior angle of shaping blade (2-5) be 0, the center of handle of a knife (1) and cutting portion be equipped with coolant liquid passageway (4), all be equipped with in three linear type chip groove (3) and spout liquid mouth (4-1) that are linked together with coolant liquid passageway (4).

2. The stepped, three-edged reamer of claim 1, wherein: the first back angle of the forming cutting edge (2-5) is alpha 1, the second back angle is alpha 2, and alpha 1 is less than alpha 2.

3. The stepped, three-edged reamer of claim 2, wherein: the first back angle alpha 1 of the forming cutting edge (2-5) is 13-17 degrees, and the second back angle alpha 2 is 23-32 degrees.

4. A stepped, three-edged reamer as claimed in claim 1, 2 or 3, wherein: the cutting edge (2) is sequentially provided with a first step (2-1), a second step (2-2), a third step (2-3) and a fourth step (2-4) from front to back, the first step (2-1) and the second step (2-2) are in conical surface transition, the slope of the conical surface is beta 1, the third step (2-3) and the fourth step (2-4) are in conical surface transition, and the slope of the conical surface is beta 2; the second step (2-2) and the third step (2-3) are in vertical surface transition, and the second step (2-2) and the vertical surface are in fillet transition.

5. The stepped, three-edged reamer of claim 4, wherein: the taper angle beta 1 between the first step (2-1) and the second step (2-2) is 45 degrees, and the taper angle beta 2 between the third step (2-3) and the fourth step (2-4) is 20 degrees to 30 degrees.

6. The stepped, three-edged reamer of claim 4, wherein: the core thickness D4 of the cutting edge (2) is 0.4-0.45 times of the diameter D2 of the second step (2-2).

7. The stepped, three-edged reamer of claim 6, wherein: the circle jump degree of the cutter handle (1) is 5-8 mu m, and the circle jump degree of the cutting part is 3-5 mu m.