CN211304915U - A double-edged chamfering extrusion drill reamer - Google Patents

Abstract

The utility model provides a double-edged chamfered extruding drill reamer, which belongs to the technical field of cutting tools. A second cutting segment for cutting, a positioning segment for positioning and supporting a tool when drilling a deep hole, and a clamping segment for fixed clamping. The utility model greatly reduces the number of times of tool clamping, avoids repeated positioning benchmarks, can be formed at one time, and is a high-efficiency composite deep hole drill bit, which can effectively improve work efficiency, and at the same time, reduce The roughness of the small processed hole wall and the increase of the metal tissue molecular density of the processed material have a good structural improvement and brightening effect on the processed material. After the first cutting section used for rough drilling is worn, the second cutting section used for sizing cutting can be shortened to form the first cutting section, so as to ensure the drilling effect and reduce the waste of materials.

Description

A double-edged chamfering extrusion drill reamer

technical field

The utility model belongs to the technical field of cutting tools, in particular to a double-edged chamfering extrusion drill reamer.

Background technique

In the process of cutting tools, for enterprises, efficiency and time are costs, which determine the level of profit; for the process of trimming the roundness accuracy of the inner hole, especially the roughness and high precision through the drilling and reamer, during the processing For different requirements of drilling, semi-finishing, reaming and fine-calibration, different tools need to be used to complete the process. The process of production replacement will waste a lot of labor and time, reducing work efficiency.

Therefore, it is necessary to design a high-efficiency composite forming reamer, which can realize the machining of various situations while eliminating the need to replace different tools.

SUMMARY OF THE INVENTION

In order to solve the problems raised in the background technology, the utility model provides a double-edged chamfering extruding drill reamer, which can complete the processing of multiple processes, and can be used for rough drilling after the first cutting section is worn out. The second cutting section used for sizing cutting is shortened to form the first cutting section, so as to ensure the drilling effect and reduce the waste of materials.

The technical scheme adopted by the utility model to solve its technical problems is as follows:

A double-edged chamfering extruded drill reamer, comprising a first cutting section for rough drilling, a second cutting section for sizing cutting, a positioning section for positioning a supporting tool when deep hole drilling, and a positioning section for A clamping segment for fixed clamping, the end of the first cutting segment is provided with a second cutting segment, the end of the second cutting segment is provided with a positioning segment, the end of the positioning segment is provided with a clamping segment, the first cutting segment, the second cutting segment The segment, the positioning segment and the clamping segment are integrally formed to form a reamer cutter body, and the inside of the reamer cutter body is provided with a spiral through hole penetrating the reamer cutter body for introducing cooling liquid.

Further, the first cutting segment and the second cutting segment are both double-edged structures, the double-edged edges are arranged in a spiral shape, the concave portion between the double-edged edges of the first cutting segment forms a first helical drain groove, and the first cutting segment The cutting edge and the cutting edge of the second cutting segment are arranged on the same helix in one-to-one correspondence.

Further, the edge of the first cutting segment extends to the end of the second cutting segment, the outer diameter of the first cutting segment is smaller than the outer diameter of the second cutting segment, and the edge of the first cutting segment of the extended segment is connected to the second cutting segment on one side. An extension recess is formed between the cutting points of the rear positioning dimension of the segment blade, and a second spiral drain groove is formed between the cutting point of the front positioning dimension of the second cutting segment edge on the other side, the first spiral drain groove and the second spiral drain communication between the drains.

Further, there are two spiral through holes, the upper part of the two spiral through holes is arranged along the blade of the first cutting segment, the upper part of the two spiral through holes is respectively pierced by the center of the top of the blade of the two first cutting segments, and the lower part is collected. After reaching the same through hole, it passes through the bottom of the clamping section.

Further, the positioning segment is a hexagonal structure, and the radian of the convex portion is consistent with the radian of the clamping segment.

The beneficial effects of the present utility model:

1. The utility model completes the deep hole machining of the tool at one time through the combination of rough drilling, sizing processing, and rear guidance, especially the first cutting section and the second cutting section with double-edged design, and the core diameter is unchanged. It strengthens the torque and strength of the tool, which has a very good stabilization effect on deep hole machining. In addition, the hexagonal design of the positioning section has a very powerful rear guiding effect on steps and intermittent steps, especially the hexagonal above it. The design also has a molecular structure of deburring and extruding the inner wall material for the machined hole wall, so that the machined hole wall has a good structural density, including the improvement of the metal roughness on the structure.

2. The utility model greatly reduces the number of times of tool clamping, avoids repeated positioning benchmarks, can be formed at one time, and is a high-efficiency composite deep hole drill, which can effectively improve work efficiency. , reducing the roughness of the processed hole wall and increasing the metal tissue molecular density of the processed material, which has a good structural improvement and brightening effect on the processed material.

3. When the first cutting section is worn, it is only necessary to grind the second cutting section, and the front end of the blade of the second cutting section is ground to be flush with the blade of the first cutting section, so that the grinding section can form the first cutting section. An extension of the cutting segment, the structure is the same as that of the first cutting segment, so that the worn first cutting segment is extended and the second cutting segment is shortened, but it will not affect the cutting accuracy of the fixed size, and at the same time, it can ensure the drilling effect, so that the tool can Reuse to avoid material waste.

Description of drawings

Fig. 1 is the front view of the utility model;

Fig. 2 is the C-C sectional view of the utility model;

3 is a sectional view of the utility model B-B;

Fig. 4 is the A-A sectional view of the utility model;

5 is a top view of the first cutting section of the present invention;

6 is a D-D sectional view of the utility model.

In the figure, A-first cutting segment, B-second cutting segment, C-positioning segment, D-holding segment, 1-spiral through hole, 2-first spiral drain groove, 3-first cutting segment blade, 4- The cutting edge of the second cutting segment, 5- The cutting point of the rear positioning dimension, 6- The extended recess, 7- The cutting point of the front positioning dimension, 8- The second spiral drain groove.

Detailed ways

The technical solutions of the present utility model will be described in further detail below with reference to the embodiments and the accompanying drawings.

As shown in Figures 1-6, a double-edged chamfering squeeze drill reamer includes a first cutting section A for rough drilling, a second cutting section B for sizing cutting, and a deep hole drilling reamer. When positioning the positioning section C for supporting the tool and the clamping section D for fixing and clamping, the end of the first cutting section A is provided with a second cutting section B, and the end of the second cutting section B is provided with a positioning section C. The end of section C is provided with a clamping section D. The first cutting section A, the second cutting section B, the positioning section C and the clamping section D are integrally formed to form a reamer body, which can complete multiple passes such as drilling, rough drilling, and positioning. When the process is completed, when drilling, semi-finishing, reaming, and fine-tuning and other processes have different requirements, there is no need to replace the tools frequently, which reduces labor and time investment and improves work efficiency. The inside of the reamer body is provided with a helical through hole 1 that penetrates the reamer body for introducing cooling liquid. The existing reamer all add cooling liquid from the outside. When drilling deep holes, the cooling liquid cannot reach the position of the cutter head. It is easy to cause the cutter head to be overheated and increase the cutter head wear rate, and the reamer is provided with a spiral through hole 1. When drilling, the coolant is directly guided from the spiral through hole 1 to the reamer head to avoid deep hole drilling. A series of problems, such as the inability of the cutter head to cool due to the inability of the coolant to enter the cutter head, can effectively slow down the wear rate of the cutter head.

The first cutting section A and the second cutting section B are both double-edged structures, and the double-edged edges are arranged in a spiral shape. The cutting segment cutting edge 3 and the second cutting segment cutting edge 4 are arranged on the same helix in one-to-one correspondence. The first cutting segment edge 3 extends to the end of the second cutting segment B, the outer diameter of the first cutting segment A is smaller than the outer diameter of the second cutting segment B, and the first cutting segment edge 3 of the extended segment is connected to one side of the An extension recess 6 is formed between the cutting points 5 of the rear positioning dimension of the second cutting segment blade 4, and a second spiral drain groove 8 is formed between the cutting point 7 of the front positioning dimension of the second cutting segment blade 4 on the other side, The first spiral drainage groove and the second spiral drainage groove 8 communicate with each other, and both the extended escape groove 6 and the second spiral drainage groove 8 can increase the chip removal space of the second cutting section B. As shown in FIG. The first cutting section A adopts a double-edged form, and is designed with an independent rake angle and a cutting groove, so that it has better cutting performance and cutting type compared with the conventional step drill reamer, which can greatly reduce the cutting resistance and cutting. The introduction and separation of the cutting heat generated during the cutting process greatly improves the service life of the tool. At the same time, in the design of the drill tip of the first cutting section A, the design of the positive tooth gap is used, combined with the refined chamfering passivation. process, to eliminate the chipping state of the drill tip part, so as to promote the tool to eliminate the initial defects due to the manufacturing process. The second cutting section B is a fixed-size part for forming a fixed-size hole. It also adopts a double-edged form and is an extension of the first cutting section A. The design feature is to increase the core diameter strength of the elongated drill bit. Under the circumstance, without changing the core diameter of the tool, increasing the strength of the elongated drill bit has the effect of increasing the cutting torque for deep holes with special requirements. The double-edged design can increase the back support of the tool, so that the tool can support, squeeze and position the machined surface or inner wall in the cutting state, and ensure the accuracy, roundness and concentricity of the machined hole wall. The rake angle design of the part is independently designed, and fine grinding and high finish effect are carried out, so that the cutting resistance and high appearance effect are reduced during the use of the tool, so that the machined surface has a high appearance effect, which can reach Ra0.4 the following. At the same time, since the cutting edge 3 of the first cutting section extends to the end of the second cutting section B, the outer diameter of the first cutting section A is smaller than the outer diameter of the second cutting section B, and the tool can be ground for a long time after wear without affecting its accuracy and strength, when the first cutting section A is worn, it is only necessary to grind the second cutting section B, and the front end of the blade 4 of the second cutting section is ground to be flush with the blade 3 of the first cutting section. The grinding part forms an extension of the first cutting section A, and the structure is consistent with the first cutting section A, so that the worn first cutting section A is extended and the second cutting section B is shortened, but it will not affect the cutting accuracy of the fixed size, and at the same time The drilling effect can be ensured, and the grinding length of the second cutting section B is until the second cutting section B cannot be properly sized to expand the hole. The second cutting section B adopts a double-groove design, which has a decisive improvement in the later grinding of the tool. During the grinding process, the tool will be cleaned to avoid vacancies. With this double-edged design, repeated repairs can be avoided. The loss of the outer diameter of the pre-drilled part of the grinding causes the first part of the tool to fail.

There are two spiral through holes 1, the upper part of the two spiral through holes 1 is arranged along the first cutting segment blade 3, and the upper part of the two spiral through holes 1 is respectively pierced by the top center of the two first cutting segment blade 3. , the lower part gathers into the same through hole and passes through the bottom of the clamping section D, and cooperates with the double-edged structure of the reamer to ensure that the coolant can reach all positions of the cutter head and ensure the cooling effect.

The positioning section C is a hexagonal structure, and the radian of the convex part is consistent with the radian of the clamping section D. The positioning section C mainly plays the role of a rear guide and extrusion positioning support. During the use of the extended deep hole step drill, Due to the characteristics of deep hole cutting, the tool will have problems such as deviation. In the design process of the utility model, a positioning section C with a hexagonal design is added to eliminate the deviation problem of the tool. The positioning section C is mainly used to position the reamer in the deep hole during the deep hole process. The traditional reamer uses a cylindrical section for positioning in the deep hole positioning. During the drilling process, the debris cannot be eliminated, so that the debris is located between the cylindrical section and the drilling hole for a long time, and the wall of the drilling hole is prone to burrs. The positioning section C of the reamer of the present invention is a hexagonal structure, and the positioning section C and the drilling hole The wall of the hole is in point contact, the convex part is used to position and support the tool, and the concave part is used for chip removal to discharge the generated chips to avoid burrs on the wall of the drilling hole.

The utility model completes the deep hole machining of the tool at one time through the combination of rough drilling, sizing machining, rear guidance, etc., especially when the core diameter of the first cutting section A and the second cutting section B are double-edged design, and the core diameter is unchanged. It strengthens the torque and strength of the tool, which has a very good stabilization effect on deep hole processing. In addition, the hexagonal design of the positioning section C has a very powerful rear guiding effect on steps and intermittent steps, especially the six The edge design, as well as the molecular structure of deburring and extruding the inner wall material on the processed hole wall, promotes the processed hole wall to have a good structural density, including the improvement of the metal roughness on the organizational structure.

The utility model greatly reduces the number of times of tool clamping, avoids repeated positioning benchmarks, can be formed at one time, and is a high-efficiency composite deep hole drill bit, which can effectively improve work efficiency, and at the same time, reduce The roughness of the small processed hole wall and the increase of the metal tissue molecular density of the processed material have a good structural improvement and brightening effect on the processed material.

Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should Various changes can be made in the above and in the details without departing from the scope of the present invention as defined by the claims of the present invention.

Claims (5)

1. The double-edge chamfering extrusion drilling reamer is characterized by comprising a first cutting section for rough drilling, a second cutting section for fixed-size cutting, a positioning section for positioning and supporting a cutter during deep hole drilling and a clamping section for fixing and clamping, wherein the second cutting section is arranged at the tail end of the first cutting section, the positioning section is arranged at the tail end of the second cutting section, the clamping section is arranged at the tail end of the positioning section, the first cutting section, the second cutting section, the positioning section and the clamping section are integrally formed to form a reamer cutter body, and a spiral through hole penetrating through the reamer cutter body and used for leading in cooling liquid is formed in the reamer cutter body.

2. The reamer of claim 1, wherein the first cutting section and the second cutting section are both of a double-edged structure, the double edges are spirally arranged, an inner concave portion between the double edges of the first cutting section forms a first spiral drainage groove, and the cutting edges of the first cutting section and the cutting edges of the second cutting section are correspondingly arranged on the same spiral line one by one.

3. The double-edged chamfering extrusion drilling reamer as claimed in claim 2, wherein the cutting edge of the first cutting section extends to the end of the second cutting section, the outer diameter of the first cutting section is smaller than that of the second cutting section, an extension clearance groove is formed between the cutting edge of the first cutting section of the extension section and the rear positioning size cutting point of the cutting edge of the second cutting section on one side, a second spiral discharge groove is formed between the cutting edge of the second cutting section on the other side and the front positioning size cutting point of the cutting edge of the second cutting section on the other side, and the first spiral discharge groove and the second spiral discharge groove are communicated with each other.

4. The double-edged chamfering extrusion drilling reamer as claimed in claim 2, wherein the number of the spiral through holes is two, the upper parts of the two spiral through holes are arranged along the cutting edge of the first cutting section, the upper parts of the two spiral through holes respectively penetrate through the centers of the tops of the cutting edges of the two first cutting sections, and the lower parts of the two spiral through holes are converged to the same through hole and then penetrate through the bottom of the clamping section.

5. The reamer as claimed in any one of claims 1 to 4, wherein the locating section is a hexagonal structure and the radian of the convex portion is consistent with the radian of the clamping section.

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