CN112658340A - Drill bit and machining process thereof - Google Patents
Drill bit and machining process thereof Download PDFInfo
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- CN112658340A CN112658340A CN202011500433.5A CN202011500433A CN112658340A CN 112658340 A CN112658340 A CN 112658340A CN 202011500433 A CN202011500433 A CN 202011500433A CN 112658340 A CN112658340 A CN 112658340A
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Abstract
The invention discloses a rotary tool and a processing technology thereof, wherein the rotary tool comprises a first original and at least one second original, the first original and the second original form a tip part of a drill bit and a spiral chip guide groove, the spiral chip guide groove extends downwards from the tip part in the axial direction, and the hardness of the first original is less than that of the second original; the invention has the advantages of good cutting effect, low cost and convenient processing.
Description
Technical Field
The invention relates to a drill bit and a machining process thereof.
Background
The conventional drill bit is usually a blank made of the same material and is formed by machining. Such as twist drills, carpentry drills, construction drills, etc., which have different cutting and drilling effects and service lives due to different hardness of blank materials, for example, a blank material is made of a low-price steel material, a medium-price steel material or a high-price steel material, and the more expensive the blank material is, the higher the hardness of the steel material is, the completely different effects and service lives are brought. Therefore, how to reduce the production cost and consider the overall quality of the control drill bit becomes a problem to be solved urgently by the technical personnel in the field.
Disclosure of Invention
The invention mainly solves the technical problem of providing a drill bit and a processing technology thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a drill bit and processing technology thereof, wherein, includes first original paper and second original paper, first original paper and second original paper form the point portion and the spiral chip guide groove of drill bit, and the spiral chip guide groove extends downwards from the axial of point portion, and the hardness of first original paper is less than the hardness of second original paper, and the second original paper is located the outside that the point portion was located and first original paper was located the point portion.
Through the cooperation of two different hardnesses, on the basis of guaranteeing original intensity, holistic manufacturing cost has been reduced. The material of the first original is relatively poor, the hardness and the wear resistance of the first original are also poor, the cost of the first original is relatively low, the material of the second original is relatively good, the hardness and the wear resistance of the second original are relatively good, the cost of the second original is also higher than that of the first original, the second original is positioned at the head, under the rotary cutting operation, the abrasion speed of the first original is higher than that of the second original, and the abrasion speed of the second original is lower than that of the second original, so that the self-grinding effect is formed, the second original is abraded and exposed, and in the rotating process, the whole contact area is consistent, so that the head of the product can be always kept in an original state; however, since the two materials have different wear resistance degrees, the material with poor wear resistance is worn, and the material with high wear resistance is sharper, thereby generating an effect of self-sharpening. And simultaneously, the service life of the whole body is prolonged.
Wherein, the second original embedding is fixed in the first original.
Adopt embedded fixed for the joint strength of second original paper and first original paper is higher, moreover after processing, can be so that second original paper part exposes outside.
Wherein, be equipped with the cavity in the first original paper, second original paper and cavity adaptation, the second original paper stretches into in the cavity.
Through the arrangement of the concave cavity, the concave cavity and the convex cavity are more convenient to match.
Wherein, the second original paper is interference fit with the cavity.
And the interference fit is adopted, so that the integral fixing strength is further improved.
Wherein, the second original paper is big end down setting.
The adoption is big-end-up set up for first original paper is connected more closely with the second original paper, and in addition after processing, the helicla flute can not stretch into to the second part, leads to the joint strength between two kinds to reduce.
Wherein the second element forms a vertex angle on the tip portion.
Adopt the setting of second original paper formation apex angle, guarantee at the cutting in-process, the cutting effect on point portion top rotates the in-process moreover, wears out first original paper easily, realizes the autogenous grinding effect.
Wherein the second element is located on the main cutting edge of the tip portion.
Adopt the second original paper to be located main cutting edge, improve holistic cutting effect.
Wherein, first original paper and second original paper are the coaxial setting, and the second original paper is located the second original paper.
The concentric shaft is adopted, so that the concentric shaft and the concentric shaft are better matched, and the integral strength is improved.
The first original piece and the second original piece are processed by rolling, milling or grinding to form the drill bit.
By adopting the processing modes, the processing is more convenient.
Wherein, form dysmorphism portion on the radial direction of second original paper, dysmorphism portion and first original paper gomphosis.
Adopt the setting of dysmorphism portion for form the footpath block between second original paper and the first original paper, make joint strength between the two higher. And it should be noted here that, before processing, need heat the blank, the junction of first original paper and second original paper can take place partial fusion after the heating, further improves holistic joint strength.
The first element and the second element form a drill bit, the length of the drill bit is L1, the length of the concave cavity is L2, and L2/L1 is not less than 1/4 and not more than 2/3.
The length is limited, so that the matching area of the first original piece and the second element is larger, and the integral connecting effect is ensured.
Wherein, the external diameter of second original paper is one third to four fifths of the external diameter of first original paper.
And the cutting strength of the whole is further ensured by the limitation of the two dimensional ratios. Because the material of first original paper is injectd, leads to at the in-process of cutting, wearing and tearing take place very easily, if the area that first original paper occupied is too big, wearing and tearing take place very easily, reduce life. If the material of the second element is excessive, the cost is increased.
Wherein, one end of the first original piece is provided with a handle part.
The stalk portion directly sets up on first original paper, has reduced manufacturing cost, adds man-hour at first original paper, directly accomplishes the stalk portion processing, saves technology.
The machining process of the drill bit comprises the drill bit and comprises the following machining steps:
a, processing a first original: a first original is processed and molded, and a concave cavity is formed in the head of the first original;
b: and (3) processing a second original: the second original piece is processed and molded and is matched with the concave cavity;
c: embedding: under the normal temperature state, integrally embedding the second original piece into the concave cavity to form a blank;
d: heating: heating the blank;
e: processing: machining the blank into a drill bit by rolling or milling or grinding;
f: grinding and polishing: and grinding and polishing the machined blank.
At first raw materials processing takes the raw materials of stalk portion, its lower part is cylindrical setting, then axial direction upwards offers a cavity on the top surface of lower part, the cavity sets up for the concentric shaft with the lower part, the whole embedding of second original paper is to the cavity in, the lower part has still been formed for cylindrically, but inside is the second raw materials, it needs to notice here, when the second raw materials imbeds to first raw materials, the top surface of second raw materials is coplane setting with the top surface of lower part, through the heating, make first raw materials and second raw materials heat softening, the effect of helicla flute and sharp portion has been formed through processing, through burnishing and polishing at last, form a complete drill bit, this kind of processing technology, the drill bit after the manufacturing, high rigidity has, and the effect of price cost reduction, and processing operation is very convenient.
Wherein the heating temperature is 800-1200 ℃.
The processing effect of first raw materials and second raw materials has further been guaranteed in the injecion of heating temperature for both soften the back can improve holistic joint strength through better integration.
Wherein, embedding technology passes through stamping equipment and imbeds the second original paper in the first original paper.
The embedding process is that at normal temperature, directly imbed the second original paper in the first original paper through the punching press, convenient operation.
Drawings
FIG. 1 is a front view of embodiment 1 of the present invention;
fig. 2 is a front view of a first original in embodiment 1 of the present invention;
fig. 3 is a sectional view of a first original in embodiment 1 of the present invention;
fig. 4 is a front view of a second original in embodiment 1 of the present invention;
FIG. 5 is an axial sectional view of embodiment 1 of the present invention;
FIG. 6 is a radial cross-sectional view of embodiment 1 of the present invention;
FIG. 7 is a top view of embodiment 1 of the present invention;
FIG. 8 is a top view of embodiment 2 of the present invention;
FIG. 9 is a top view of embodiment 3 of the present invention;
FIG. 10 is a front view of embodiment 4 of the present invention;
FIG. 11 is a front view of embodiment 5 of the present invention;
FIG. 12 is a sectional view of embodiment 6 of the present invention;
FIG. 13 is a process flow diagram of example 7 of the present invention;
FIG. 14 is a sectional view of embodiment 7 of the present invention;
FIG. 15 is a sectional view of example 8 of the present invention.
Detailed Description
Example 1:
referring to fig. 1-7, a drill includes a first element 1 and a second element 2.
The hardness of first original 1 is less than the hardness of second original 2, for example, first original 1 is low-priced steel, and second original 2 is medium steel, has realized the integration of two different hardnesses, and its specific structure is as follows.
The first original 1 is provided with a handle part 11 and a lower part 12, the handle part 11 is connected with the lower part 12, and the handle part 11 can be a taper shank, a four-groove square shank, a double-groove round shank, a four-groove round shank, a hexagonal shank, a straight spline shank, a spiral spline shank or an arc spline shank. The shape of the handle 11 here can also be a dual-purpose handle 11 described in the chinese patent application No. CN 211278263U.
The lower portion 12 comprises a cylindrical arrangement with a planar top surface. The cavity 121 is formed on the top surface of the cylinder, the cavity 121 extends axially upward, the cavity 121 and the cylinder are coaxially disposed, here, the cross-sectional shape of the cavity 121 may be circular, square, hexagonal, octagonal, etc., and in this embodiment, the cross-section is only a circle.
The length of the cavity 121 in the axial direction is L2, where the outer diameter of the cavity 121 is one third to four fifths, preferably two thirds, of the overall outer diameter of the first element 1. And the cutting strength of the whole is further ensured by the limitation of the two dimensional ratios. Because the material of first original piece 1 is injectd, lead to in the in-process of cutting, wearing and tearing take place very easily, if the area that first original piece 1 occupied is too big, wearing and tearing take place very easily, reduce life. If the material of the second original 2 is excessive, the cost increases.
Second original 2 is whole to be embedded into cavity 121 in, the overall shape size and the cavity 121 adaptation of second original 2, so the shape of second original 2 here is cylindrical, and when second original 2 was embedded into cavity 121 in, the top surface of first original 1 and the top surface of second original 2 were for sharing the top surface setting, and second original 2 and cylindrical concentric shaft setting. Further, the first element 1 and the second element 2 are in interference fit, so that the size of the second element 2 is consistent with that of the cavity 121, when the first element 1 and the second element 2 are matched, the overall length of the drill is L1, the length of the second element 2 is L2, L2/L1 is not less than 1/4 and not more than 2/3, and preferably L2/L1= 1/2. The length is limited, so that the matching area of the first element 1 and the second element is larger, and the integral connecting effect is ensured. Furthermore, the outer diameter of the second original 2 is one third to four fifths, here preferably two thirds, of the outer diameter of the first original 1.
Second original 2 imbeds to first original 1 after fixed, forms the blank, and the whole shape of blank here is unanimous with first original 1, and the difference that lies in cavity 121 is filled in by second original 2, and holistic surface both are unanimous. It should be noted here that the handle of the blank is the handle of the first element 1. The blank is heated and rolled to form spiral chip guide grooves 31 and a tip portion 32, the number of the spiral chip guide grooves 31 is preferably two, and the spiral chip guide grooves 31 extend from the tip portion to the handle portion along the axial direction, and the tip portion 32 is formed correspondingly to the coplanar position. Second original 2 is located the central point of point portion 32 and puts, and point portion 32 forms for second original 2, and second original 2 exposes outside the axial top of first original 1, and first original 1 is located the radial outside of second original 2 to the autogenous grinding effect has been realized. It should be noted here that the apex angle 321 on the tip portion 32 is formed by the second element 2, thereby ensuring the cutting strength.
After the rolling process is completed, a plurality of special-shaped portions 21 are formed on the outer surface of the second original piece 2, namely, radial twisting force is generated in rolling, so that the cross section is changed from a circular shape to a special shape, the special-shaped portions 21 are located on the outer surface of the cross section, the special-shaped portions 21 are firmly fixed with the inner wall of the cavity 121, a locking effect in the radial direction is formed, and the first original piece 1 is not prone to falling off after being matched with the second original piece 2. It should be noted here that, before rolling, the blank needs to be heated, and after heating, the joint of the first original piece 1 and the second original piece 2 may be partially fused, so as to further improve the overall connection strength.
The drill bit in the embodiment can be a twist drill, a woodworking drill and a construction drill.
Through the cooperation of two different hardnesses, on the basis of guaranteeing original intensity, holistic manufacturing cost has been reduced. The material of the first original 1 is poor, the hardness and the wear resistance of the first original 1 are also poor, the cost of the first original 1 is also low, the material of the second original 2 is good, the hardness and the wear resistance of the second original are good correspondingly, the cost of the second original 2 is higher than that of the first original 1, the second original 2 is located at the head position, under the rotary cutting operation, the abrasion speed of the first original 1 is higher than that of the second original 2, the abrasion speed of the second original 2 is lower than that of the second original 2, so that a self-grinding effect is formed, the second original 2 is exposed after abrasion, and the whole contact area is consistent in the rotating process, so that the head of a product can be kept in an original state all the time; however, since the two materials have different wear resistance degrees, the material with poor wear resistance is worn, and the material with high wear resistance is sharper, thereby generating an effect of self-sharpening. And simultaneously, the service life of the whole body is prolonged.
Example 2:
referring to fig. 8, the difference between embodiment 2 and embodiment 1 is that the number of the second elements 2 is two, the two elements 2 are respectively arranged on two main cutting edges 322, and are symmetrically arranged relative to a vertex angle 321, and the two elements 2 are arranged on the main cutting edges 322, so that a high-strength cutting effect is achieved, and the overall cutting effect is improved. It should be noted here that the first original 1 is provided with a cavity corresponding to the second original 2.
Example 3:
referring to fig. 9, embodiment 3 differs from embodiment 1 in that the number of second elements 2 is three, one of the second elements 2 forms a top corner 321, and the other two second elements 2 are provided on a main cutting edge 322, thereby improving the overall cutting effect. It should be noted here that two of the three second elements 2 are not connected.
Example 4:
referring to fig. 10, embodiment 4 is different from embodiment 1 in that the blank is heated and then processed by milling.
Example 5:
referring to fig. 11, the difference between example 5 and example 1 is that the blank is heated and then processed by grinding.
Example 6:
referring to fig. 12, the difference between embodiment 6 and embodiment 1 is that the cavity 121 is configured to be large in top and small in bottom, the size of the opening of the cavity 121 is larger than that of the bottom surface of the cavity 121, and the second original 2 is also configured to fit into the cavity 121, and the first original 1 and the second original 2 are connected more tightly by adopting the large-top and small-bottom configuration.
Example 7:
referring to fig. 13 to 14, a process for machining a drill includes a drill, where a specific structure of the drill is described in detail in the above embodiments, and therefore not described herein, the machining steps are as follows:
a, processing a first original: a first original is processed and molded, and a concave cavity is formed in the head of the first original;
b: and (3) processing a second original: the second original piece is processed and molded and is matched with the concave cavity;
c: embedding: under the normal temperature state, integrally embedding the second original piece into the concave cavity to form a blank;
d: heating: heating the blank;
e: processing: machining the blank into a drill bit by rolling or milling or grinding;
f: grinding and polishing: and grinding and polishing the machined blank.
First, the first raw material is processed into a raw material with a handle, and the lower part of the raw material is cylindrical, and the processing is the existing processing method, so that the processing is not repeated. A cavity 121 is formed in the top surface of the lower part 12 of the first element by means of a drilling or milling machine, and the cavity 121 and the lower part 12 are coaxially arranged.
Second original paper 2 is greater than the raw and other materials of first original paper 1 for the hardness, cuts into the size with cavity 121 adaptation, and the external diameter of cavity 121 here can be seted up according to the external diameter of second original paper 2 to realized cooperation effect between them, and made second original paper 2 processing more convenient, only need cut can, need not carry out all the other operations.
Through stamping equipment with the 2 punching presses of second original paper to the cavity 121 of first original paper 1 in, form embedded fixed, here stamping equipment can be according to actual demand to guarantee the effect of embedding, because second original paper 2 sets up for the concentric axis with cavity 121, during the punching press, only need through the perpendicular decurrent power of axial, can realize fixed effect. In this embodiment, after the embedding, first original paper 1 and second original paper 2 are coplane setting, for wholly imbed in cavity 121 promptly, after first original paper 1 and the cooperation of second original paper 2, form the blank. The blank forms one end and is the stalk portion setting, and the other end is cylindrical setting. It should be noted here that stamping process only need operate under normal atmospheric temperature can, need not to heat first original paper 1 or the operation of cooling down, saved the technology, heat or the operation of cooling down in addition, increased the operation degree of difficulty, under normal atmospheric temperature, the manual work also can operate, and operation process is very simple, convenient.
The cylindrical portion of the blank tip 32 is heated, typically at high frequency, at a temperature of 800 c to 1200 c, preferably 1000 c. The processing effect of first raw materials and second raw materials has further been guaranteed in the injecion of heating temperature for both soften the back can improve holistic joint strength through better integration. The heating makes columniform point portion 32 soften, then through rolling or mill or grind technology for cylindrical portion has formed the effect of helicla flute and point portion 32, through burnishing and polishing at last, forms a complete drill bit, and further, in order to improve holistic antirust effect, also can paint protective oil on the drill bit, plays antirust effect.
The drill bit manufactured by the processing technology has the effects of high hardness and low price and cost, and the processing operation is very convenient.
The machining process is different from the prior art in that an embedding process is added, but the embedding process also works at normal temperature, the operation is extremely simple, but the manufactured drill bit has the effects of high hardness and low price cost, and the production cost is greatly reduced.
Example 8:
referring to fig. 15, the difference between embodiment 8 and embodiment 7 is that when the first original 1 is processed, two cavities need to be formed in the first original 1, and two second original 2 are inserted into the cavities, so as to form a blank. After machining, the two second elements are located on the two main cutting edges 322, respectively, thereby improving the overall cutting effect.
Claims (10)
1. A drill bit, characterized by: including first original paper and at least one second original paper, first original paper and second original paper form the point portion and the spiral chip guide groove of drill bit, and the spiral chip guide groove extends downwards from the axial of point portion, and the hardness of first original paper is less than the hardness of second original paper.
2. A drill bit according to claim 1, wherein: the second original is embedded and fixed in the first original.
3. A drill bit according to claim 1, wherein: be equipped with the cavity in the first original paper, second original paper and cavity adaptation, the second original paper stretches into in the cavity.
4. A drill bit according to claim 3, wherein: the second original piece and the cavity are in interference fit.
5. A drill bit according to claim 3, wherein: the second original paper is arranged in a size from top to bottom.
6. A drill bit according to claim 1, wherein: the second element forms a vertex angle on the tip.
7. A drill bit according to claim 1, wherein: the second element is located on the main cutting edge of the tip portion.
8. A drill bit according to claim 1, wherein: the first original piece and the second original piece are processed into the drill bit through rolling, milling or grinding.
9. A drill bit according to claim 1, wherein: form dysmorphism portion in the radial direction of second original paper, dysmorphism portion and first original paper gomphosis.
10. The machining process of the drill bit is characterized in that: a drill bit comprising the drill bit of any of claims 1-9, and being manufactured by the steps of:
a, processing a first original: a first original is processed and molded, and a concave cavity is formed in the head of the first original;
b: and (3) processing a second original: the second original piece is processed and molded and is matched with the concave cavity;
c: embedding: under the normal temperature state, integrally embedding the second original piece into the concave cavity to form a blank;
d: heating: heating the blank;
e: processing: machining the blank into a drill bit by rolling or milling or grinding;
f: grinding and polishing: and grinding and polishing the machined blank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011500433.5A CN112658340B (en) | 2020-12-17 | 2020-12-17 | Drill bit and machining process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011500433.5A CN112658340B (en) | 2020-12-17 | 2020-12-17 | Drill bit and machining process thereof |
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| CN112658340A true CN112658340A (en) | 2021-04-16 |
| CN112658340B CN112658340B (en) | 2022-08-16 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB709740A (en) * | 1951-06-11 | 1954-06-02 | John M Perkins & Smith Ltd | Tipped chisels, drills and like tools |
| CN101338673A (en) * | 2008-07-31 | 2009-01-07 | 南阳开天工程机械有限公司 | Core inlaid drill rod for hydraulic breaking hammer and its manufacture method |
| CN201684959U (en) * | 2010-03-19 | 2010-12-29 | 江苏永伟精密工具有限公司 | Detachable type drill |
| CN104588739A (en) * | 2014-12-30 | 2015-05-06 | 株洲钻石切削刀具股份有限公司 | Rotary machining tool |
| CN104646674A (en) * | 2014-12-27 | 2015-05-27 | 株洲三湘硬质合金工具有限公司 | Method for manufacturing wear-resistant part by compounding diamond with metal blank body and product produced by same |
| CN207508360U (en) * | 2017-04-12 | 2018-06-19 | 郭蓓蓓 | A kind of chip dividing drill head for processing cutting-resistant metal material |
-
2020
- 2020-12-17 CN CN202011500433.5A patent/CN112658340B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB709740A (en) * | 1951-06-11 | 1954-06-02 | John M Perkins & Smith Ltd | Tipped chisels, drills and like tools |
| CN101338673A (en) * | 2008-07-31 | 2009-01-07 | 南阳开天工程机械有限公司 | Core inlaid drill rod for hydraulic breaking hammer and its manufacture method |
| CN201684959U (en) * | 2010-03-19 | 2010-12-29 | 江苏永伟精密工具有限公司 | Detachable type drill |
| CN104646674A (en) * | 2014-12-27 | 2015-05-27 | 株洲三湘硬质合金工具有限公司 | Method for manufacturing wear-resistant part by compounding diamond with metal blank body and product produced by same |
| CN104588739A (en) * | 2014-12-30 | 2015-05-06 | 株洲钻石切削刀具股份有限公司 | Rotary machining tool |
| CN207508360U (en) * | 2017-04-12 | 2018-06-19 | 郭蓓蓓 | A kind of chip dividing drill head for processing cutting-resistant metal material |
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