阅读说明：本技术 一种铝用直槽钻头排屑槽后处理工艺 (Post-treatment process for chip groove of straight-groove drill bit for aluminum ) 是由 武富华 于 2021-06-09 设计创作，主要内容包括：本发明公开了一种铝用直槽钻头排屑槽后处理工艺,本发明涉及机械加工技术领域。该铝用直槽钻头排屑槽后处理工艺,通过S1、扩槽处理；S2、槽内去杂质；S3、剖光处理；S4、热处理；S5、真空淬火,能够通过改变钻头排屑槽纵线与前刀面角度以及槽内深度,能够使钻头在作业时减少切屑的倾斜角度,能够使其顺着孔内壁以及排屑槽底部将碎屑排出,从而能够有效的避免因排屑困难导致加工受到影响的现象,同时通过钻头槽内壁进行热处理以及镀层处理,然后将热处理后的钻头进行真空淬火以及槽内壁精打磨,能够增加钻头扩槽后的韧性以及槽内壁与前刀面的耐磨程度,减小了切屑与槽内壁的摩擦力,避免了切屑在排出时对槽内壁粗糙度造成影响。(The invention discloses a post-treatment process for a chip groove of an aluminum straight-groove drill bit, and relates to the technical field of machining. The post-treatment process of the straight flute drill chip groove for aluminum comprises the steps of S1 and groove expanding treatment; s2, removing impurities in the tank; s3, polishing; s4, heat treatment; s5, vacuum quenching, can be through changing drill bit chip groove longitudinal line and rake face angle and the inslot degree of depth, can make the drill bit reduce the inclination of smear metal when the operation, can make it discharge the piece along hole inner wall and chip removal tank bottom, thereby can effectually avoid receiving the phenomenon of influence because of the difficult processing that leads to of chip removal, carry out thermal treatment and cladding material through drill bit inslot wall simultaneously, then carry out vacuum quenching and the smart polishing of inslot wall with the drill bit after thermal treatment, can increase toughness and the wear-resisting degree of inslot wall and rake face behind the drill bit groove expansion, the frictional force of smear metal and inslot wall has been reduced, the smear metal has been avoided causing the influence to inslot wall roughness when discharging.)

1. The post-treatment process for the chip groove of the straight-groove drill bit for aluminum is characterized by comprising the following steps of: the method specifically comprises the following steps:

s1, groove expanding treatment: fixing a drill bit inside the groove expanding equipment, performing groove expanding treatment on a straight groove of the drill bit through the groove expanding equipment, increasing the depth in the corresponding groove, and after the depth in the chip discharge groove is deepened, performing grinding treatment on the inclination angle of a rake face to ensure that the inner wall of the straight groove and the corresponding rake face keep the same radian;

s2, removing impurities in the tank: the drill bit after polishing is taken out of the polishing equipment, impurities and burrs on the outer surface of a drill bit core, the inner wall of the groove, the front cutter face and the surface of the main cutter are removed, and the influence on further processing of the drill bit caused by the residue of impurities such as the burrs and the like generated in the groove expanding process is avoided;

s3, polishing treatment: placing the drill bit with the impurities removed in polishing equipment for polishing, and reducing the roughness of the inner wall of the straight groove and the roughness of the front cutter face by polishing the inner wall of the straight groove and the front cutter face;

s4, heat treatment: taking out the drill bit subjected to polishing treatment from the inside of the polishing equipment, placing the drill bit into a furnace body for heat treatment, and then performing plating treatment to increase the surface hardness and the wear resistance of the inner wall of a drill bit groove and a rake face;

s5, vacuum quenching: and (3) placing the drill bit after heat treatment in a vacuum quenching furnace for vacuum quenching, and then naturally cooling.

2. The post-treatment process for the chip grooves of the straight-groove drill bit for aluminum according to claim 1, which is characterized in that: when the groove expanding process in the step S1 is carried out, the depth of the bottom of the corresponding groove is required to be 35-38% of the length of the longitudinal line of the drill bit, the included angle between the rake face and the longitudinal line of the corresponding groove is required to be more than or equal to 100 degrees, and the groove expanding depth of the grooves and the corresponding angle between the longitudinal line of the grooves and the rake face are the same.

3. The post-treatment process for the chip grooves of the straight-groove drill bit for aluminum according to claim 1, which is characterized in that: during the inslot impurity removal in S2, strike off the impurity such as burr that appears because of expanding the straight flute with drill bit straight flute inner wall through polishing wheel, reduce the roughness on its surface, can avoid influencing subsequent polishing treatment simultaneously.

4. The post-treatment process for the chip grooves of the straight-groove drill bit for aluminum according to claim 1, which is characterized in that: in the case of the polishing treatment in S3, the Ra values of the drill surface, the groove inner wall, the rake face, and the main cutter were set to 0.13 μm to 0.18 μm by polishing the drill.

5. The post-treatment process for the chip grooves of the straight-groove drill bit for aluminum according to claim 1, which is characterized in that: and S4, performing heat treatment, namely firstly, placing the polished drill bit in a furnace body for heating, wherein the temperature in the furnace body is more than or equal to 600 ℃ during heating, then placing the naturally cooled drill bit in an annealing furnace for annealing treatment, secondly, performing temperature reduction treatment on the annealed drill bit to enable the surface temperature of the drill bit to reach room temperature, and then plating the inner wall of a straight groove of the drill bit and the front cutter face.

6. The post-treatment process for the chip grooves of the straight-groove drill bit for aluminum according to claim 5, wherein the post-treatment process comprises the following steps: and S4, performing heat treatment, namely performing nickel, molybdenum and phosphorus plating treatment on the inner wall of the annealed drill bit straight groove, wherein the percentage content of nickel is 1-1.2%, the percentage content of molybdenum is 3-5%, and the percentage content of phosphorus is 2.2-2.5%.

7. The post-treatment process for the chip grooves of the straight-groove drill bit for aluminum according to claim 1, which is characterized in that: and when the drill bit is subjected to vacuum quenching in the S5, placing the drill bit subjected to heat treatment into a vacuum quenching furnace body for quenching, wherein the temperature in the vacuum furnace body is more than or equal to 400 ℃ when the drill bit is subjected to vacuum quenching.

8. The post-treatment process for the chip grooves of the straight-groove drill bit for aluminum according to claim 7, wherein the post-treatment process comprises the following steps: and (8) after quenching in the step S5, performing fine grinding treatment on the outer side of the drill core of the drill bit, the rake face and the inner wall of the straight groove after quenching to reduce the roughness of the surface of the drill bit and the inner part of the straight groove after heat treatment to 0.2 mu m.

Technical Field

The invention relates to the technical field of machining, in particular to a post-treatment process for a chip groove of an aluminum straight-groove drill bit.

Background

The drilling process is a method for processing holes, wherein a drilling tool and a workpiece move relatively and axially feed, and the straight flute drill bit in the market is mainly used for drilling and processing tough base materials, such as pure aluminum, aluminum alloy, copper, composite materials and the like.

The drill bit is when carrying out the drilling operation to aluminium products, because inside main cutting sword and rake face bored the aperture, can make the smear metal broad in the smear metal, because the size of chip groove is limited, lead to the chip removal comparatively difficult, and because the extrusion of chip removal leads to the inslot wall and uses the groove forearm of a specified duration to appear the fish tail, has increased the roughness of rake face, influences the life of drill bit.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a post-treatment process for a chip removal groove of an aluminum straight-groove drill, which solves the problems of difficult chip removal and increased roughness of a cutter face.

In order to achieve the purpose, the invention is realized by the following technical scheme: the post-treatment process for the chip groove of the straight-groove drill bit for aluminum specifically comprises the following steps:

s1, groove expanding treatment: fixing a drill bit inside the groove expanding equipment, performing groove expanding treatment on a straight groove of the drill bit through the groove expanding equipment, increasing the depth in the corresponding groove, and after the depth in the chip discharge groove is deepened, performing grinding treatment on the inclination angle of a rake face to ensure that the inner wall of the straight groove and the corresponding rake face keep the same radian;

s2, removing impurities in the tank: the drill bit after polishing is taken out of the polishing equipment, impurities and burrs on the outer surface of a drill bit core, the inner wall of the groove, the front cutter face and the surface of the main cutter are removed, and the influence on further processing of the drill bit caused by the residue of impurities such as the burrs and the like generated in the groove expanding process is avoided;

s3, polishing treatment: placing the drill bit with the impurities removed in polishing equipment for polishing, and reducing the roughness of the inner wall of the straight groove and the roughness of the front cutter face by polishing the inner wall of the straight groove and the front cutter face;

s4, heat treatment: taking out the drill bit subjected to polishing treatment from the inside of the polishing equipment, placing the drill bit into a furnace body for heat treatment, and then performing plating treatment to increase the surface hardness and the wear resistance of the inner wall of a drill bit groove and a rake face;

s5, vacuum quenching: and (3) placing the drill bit after heat treatment in a vacuum quenching furnace for vacuum quenching, and then naturally cooling.

Preferably, in the step S1, when the groove expanding process is performed, the depth of the bottom of the corresponding groove is required to be 35% to 38% of the length of the longitudinal line of the drill, the angle between the rake face and the longitudinal line of the corresponding groove is required to be equal to or greater than 100 °, and the groove expanding depths of the plurality of grooves and the corresponding angles between the longitudinal lines of the grooves and the rake face are both the same.

Preferably, when removing the impurity in the inslot among S2, strike off the impurity such as burr that the straight flute inner wall of drill bit appears because of expanding the straight flute through polishing wheel, reduce the roughness on its surface, can avoid influencing subsequent polishing simultaneously and handle.

Preferably, in the polishing treatment in S3, the drill is polished so that Ra values of the drill surface, the groove inner wall, the rake face, and the main cutter are in a range of 0.13 μm to 0.18 μm.

Preferably, the heat treatment in S4 includes, first, placing the polished drill bit in a furnace body to be heated, wherein the temperature inside the furnace body is not less than 600 ℃, then placing the naturally cooled drill bit in an annealing furnace to be annealed, second, cooling the annealed drill bit to make the surface temperature reach room temperature, and then plating the inner wall of the straight flute of the drill bit and the rake face.

Preferably, in the step S4, the annealed inner wall of the straight groove of the drill is subjected to nickel, molybdenum and phosphorus plating, wherein the percentage of nickel is 1 to 1.2%, the percentage of molybdenum is 3 to 5%, and the percentage of phosphorus is 2.2 to 2.5%.

Preferably, when the drill bit is subjected to vacuum quenching in the step S5, the drill bit after heat treatment is placed in a vacuum quenching furnace body for quenching, and when the drill bit is subjected to vacuum quenching, the temperature in the vacuum furnace body is more than or equal to 400 ℃.

Preferably, after the quenching in S5, the quenched drill outer side, rake face, and straight flute inner wall are subjected to a finish grinding process to reduce the roughness of the heat-treated drill surface and straight flute inner portion to 0.2 μm.

Advantageous effects

The invention provides a post-treatment process for a chip groove of a straight-groove drill bit for aluminum. Compared with the prior art, the method has the following beneficial effects: the post-treatment process of the straight flute drill chip groove for aluminum comprises the following steps of S1: fixing a drill bit inside the groove expanding equipment, performing groove expanding treatment on a straight groove of the drill bit through the groove expanding equipment, increasing the depth in the corresponding groove, and after the depth in the chip discharge groove is deepened, performing grinding treatment on the inclination angle of a rake face to ensure that the inner wall of the straight groove and the corresponding rake face keep the same radian; s2, removing impurities in the tank: the drill bit after polishing is taken out of the polishing equipment, impurities and burrs on the outer surface of a drill bit core, the inner wall of the groove, the front cutter face and the surface of the main cutter are removed, and the influence on further processing of the drill bit caused by the residue of impurities such as the burrs and the like generated in the groove expanding process is avoided; s3, polishing treatment: placing the drill bit with the impurities removed in polishing equipment for polishing, and reducing the roughness of the inner wall of the straight groove and the roughness of the front cutter face by polishing the inner wall of the straight groove and the front cutter face; s4, heat treatment: taking out the drill bit subjected to polishing treatment from the inside of the polishing equipment, placing the drill bit into a furnace body for heat treatment, and then performing plating treatment to increase the surface hardness and the wear resistance of the inner wall of a drill bit groove and a rake face; s5, vacuum quenching: the drill bit after heat treatment is placed in a vacuum quenching furnace for vacuum quenching, the angle of inclination of chips can be reduced when the drill bit operates by changing the longitudinal line of a chip removal groove of the drill bit, the drill bit can be discharged along the inner wall of a hole and the bottom of the chip removal groove, the influence on processing caused by the difficulty of chip removal can be effectively avoided, meanwhile, heat treatment and plating treatment are carried out through the inner wall of the drill bit groove, then the drill bit after heat treatment is subjected to vacuum quenching and fine grinding of the inner wall of the groove, the toughness of the expanded groove of the drill bit and the wear resistance of the inner wall of the groove and the front tool face can be increased, the friction force between the chips and the inner wall of the groove is reduced, the influence on the roughness of the inner wall of the groove when the chips are discharged is avoided, and the service life of the drill bit is prolonged.

Drawings

FIG. 1 is a flow chart of the method of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: the post-treatment process for the chip groove of the straight-groove drill bit for aluminum specifically comprises the following steps:

s1, groove expanding treatment: fixing a drill bit inside the groove expanding equipment, performing groove expanding treatment on a straight groove of the drill bit through the groove expanding equipment, increasing the depth in the corresponding groove, and after the depth in the chip discharge groove is deepened, performing grinding treatment on the inclination angle of a rake face to ensure that the inner wall of the straight groove and the corresponding rake face keep the same radian;

s2, removing impurities in the tank: the drill bit after polishing is taken out of the polishing equipment, impurities and burrs on the outer surface of a drill bit core, the inner wall of the groove, the front cutter face and the surface of the main cutter are removed, and the influence on further processing of the drill bit caused by the residue of impurities such as the burrs and the like generated in the groove expanding process is avoided;

s3, polishing treatment: placing the drill bit with the impurities removed in polishing equipment for polishing, and reducing the roughness of the inner wall of the straight groove and the roughness of the front cutter face by polishing the inner wall of the straight groove and the front cutter face;

s4, heat treatment: taking out the drill bit subjected to polishing treatment from the inside of the polishing equipment, placing the drill bit into a furnace body for heat treatment, and then performing plating treatment to increase the surface hardness and the wear resistance of the inner wall of a drill bit groove and a rake face;

s5, vacuum quenching: and (3) placing the drill bit after heat treatment in a vacuum quenching furnace for vacuum quenching, and then naturally cooling.

In the invention, when the groove expanding treatment is carried out in S1, the depth of the bottom of the corresponding groove is required to be 35-38% of the length of the longitudinal line of the drill bit, the angle included angle between the rake face and the longitudinal line of the corresponding groove is not less than 100 degrees, and the groove expanding depths of a plurality of grooves and the corresponding angles between the longitudinal line of the groove and the rake face are the same.

In the invention, when impurities are removed from the groove in S2, the impurities such as burrs and the like on the inner wall of the straight groove of the drill bit caused by the straight groove expansion are scraped by the polishing wheel, so that the surface roughness is reduced, and the subsequent polishing treatment can be prevented from being influenced.

In the present invention, in the case of the polishing treatment in S3, the drill is polished so that the Ra values of the drill surface, the groove inner wall, the rake face, and the main cutter are in the range of 0.13 to 0.18. mu.m.

In the invention, in the heat treatment of S4, firstly, the polished drill bit is placed in a furnace body to be heated, the temperature in the furnace body is more than or equal to 600 ℃ during heating, then the drill bit after natural cooling is placed in an annealing furnace to be annealed, secondly, the drill bit after annealing is cooled to ensure that the surface temperature reaches the room temperature, and then the inner wall of a straight groove of the drill bit and the front cutter face are plated.

In the invention, heat treatment is carried out in S4, and nickel, molybdenum and phosphorus treatment is carried out on the inner wall of the annealed drill bit straight groove, wherein the percentage content of nickel is 1-1.2%, the percentage content of molybdenum is 3-5%, and the percentage content of phosphorus is 2.2-2.5%.

In the invention, when the drill bit is subjected to vacuum quenching in S5, the drill bit after heat treatment is placed in a vacuum quenching furnace body for quenching, and when the drill bit is subjected to vacuum quenching, the temperature in the vacuum furnace body is more than or equal to 400 ℃.

In the present invention, after quenching in S5, the quenched drill bit outside the drill bit, rake face, and straight flute inner wall are subjected to finish grinding treatment to reduce the roughness of the drill bit surface and straight flute inner wall to 0.2 μm after heat treatment.

In summary, the following steps: through S1, slot expansion processing: fixing a drill bit inside the groove expanding equipment, performing groove expanding treatment on a straight groove of the drill bit through the groove expanding equipment, increasing the depth in the corresponding groove, and after the depth in the chip discharge groove is deepened, performing grinding treatment on the inclination angle of a rake face to ensure that the inner wall of the straight groove and the corresponding rake face keep the same radian; s2, removing impurities in the tank: the drill bit after polishing is taken out of the polishing equipment, impurities and burrs on the outer surface of a drill bit core, the inner wall of the groove, the front cutter face and the surface of the main cutter are removed, and the influence on further processing of the drill bit caused by the residue of impurities such as the burrs and the like generated in the groove expanding process is avoided; s3, polishing treatment: placing the drill bit with the impurities removed in polishing equipment for polishing, and reducing the roughness of the inner wall of the straight groove and the roughness of the front cutter face by polishing the inner wall of the straight groove and the front cutter face; s4, heat treatment: taking out the drill bit subjected to polishing treatment from the inside of the polishing equipment, placing the drill bit into a furnace body for heat treatment, and then performing plating treatment to increase the surface hardness and the wear resistance of the inner wall of a drill bit groove and a rake face; s5, vacuum quenching: the drill bit after heat treatment is placed in a vacuum quenching furnace for vacuum quenching, the longitudinal line of a drill bit chip groove, the angle of a rake face and the depth of the groove can be changed, the inclination angle of chips can be reduced when the drill bit operates, the drill bit can be discharged along the inner wall of a hole and the bottom of the chip removal groove, the chips can be effectively prevented from being affected due to difficult chip removal, heat treatment and plating treatment can be carried out through the inner wall of the drill bit groove, and the toughness of the drill bit after groove expansion and the wear resistance of the inner wall of the groove and the rake face can be increased.

And those not described in detail in this specification are well within the skill of those in the art.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.