CN210789369U - Drill bit capable of reducing burrs and drilling machine assembly - Google Patents
Drill bit capable of reducing burrs and drilling machine assembly Download PDFInfo
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- CN210789369U CN210789369U CN201921725458.8U CN201921725458U CN210789369U CN 210789369 U CN210789369 U CN 210789369U CN 201921725458 U CN201921725458 U CN 201921725458U CN 210789369 U CN210789369 U CN 210789369U
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- 238000005553 drilling Methods 0.000 title claims abstract description 49
- 238000005520 cutting process Methods 0.000 claims abstract description 166
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- 238000012545 processing Methods 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000003754 machining Methods 0.000 description 7
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- 238000004080 punching Methods 0.000 description 6
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Abstract
The utility model provides a reduce drill bit and drilling machine subassembly of burr, including the drill bit body, the drill bit body includes rough cutting portion and finish cutting portion, the finish cutting portion external diameter is greater than rough cutting portion external diameter, be formed with the step between rough cutting portion and the finish cutting portion, be provided with at least one chip groove along the axial on the drill bit body outer periphery, the chip groove link up finish cutting portion and rough cutting portion, step top plane makes the step acutangular angle to the axis slope, forms the segmental deburring sword. The rough cutting part at the top end of the drill bit for reducing the burrs drills holes, and then the lower end fine cutting part removes redundant burrs, so that the combination of the rough cutting part and the fine cutting part can improve the surface quality of the holes, reduce the subsequent deburring procedures, reduce the processing cost and improve the production efficiency; the chip groove enables the step to form a segmented deburring edge, and the intersection of the chip groove and the step forms a main part for deburring.
Description
Technical Field
The utility model relates to a machining cutter field especially relates to a reduce drill bit and drilling machine subassembly of burr.
Background
The drill is a tool for drilling through holes or blind holes in solid materials and reaming existing holes. The drill moves along the axis direction and faces the workpiece in a linear motion (feed motion), and during drilling, the machining quality is influenced mainly due to the structural defects of the drill, as shown in fig. 1, burrs are easily generated at the edge of a hole in the drilling process, and the machining precision, the assembly precision, the use requirement, the reprocessing positioning, the operation safety, the appearance quality and other aspects are influenced badly, the requirement on a deburring process is higher and higher, and the technology for deburring is more and more emphasized. Therefore, the deburring process is rapidly developed, and the process is developed from simple manual operation to mechanization, automation and intellectualization. With the continuous development of manufacturing industry, the requirement for high-quality drilling tools is higher and higher.
Accordingly, there is a need in the art for a drill bit and drill press assembly that reduces burrs to improve the quality of the machining process.
In view of this, the present invention is proposed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a reduce drill bit and drilling machine subassembly of burr to solve the not good technical problem of current drill bit drilling quality.
Specifically, the utility model provides a reduce drill bit of burr, including the drill bit body, the drill bit body includes rough cutting portion and finish cutting portion, the finish cutting portion external diameter is greater than rough cutting portion external diameter, be formed with the step between rough cutting portion and the finish cutting portion, be provided with at least one chip groove along the axial on the outer periphery of drill bit body, the chip groove link up finish cutting portion and rough cutting portion, step top plane makes the step acutangular to the axis slope, forms the segmental deburring sword.
By adopting the scheme, the rough cutting part at the top end of the drill bit for reducing the burrs drills holes, and then the lower end fine cutting part removes redundant burrs, so that the combination of the rough cutting part and the fine cutting part can improve the surface quality of the holes, reduce the subsequent deburring process, reduce the processing cost and greatly improve the production efficiency; the chip groove enables the step to form a segmented deburring edge, and the intersection of the chip groove and the step forms a main part for deburring, so that the chip groove is simple to prepare and firm in structure; the chip groove is used for chip removal, reduces chip accumulation, influences the precision of hole, reduces the resistance, improves cutting efficiency.
Preferably, the angle of the plane of the top end of the step inclined to the axis is α, and 85 degrees and α degrees and 88 degrees.
More preferably, α is 87.5 °.
By adopting the scheme, the deburring blade reduces the friction resistance of a horizontal plane, reduces the working area of the deburring blade, more accurately aligns the generated burrs, the inclined blade surface guides the chips to be removed, the punching success rate is improved, the deburring blade structure is firmer, and the service life is prolonged.
Preferably, the plane of the top end of the step is concave into an arc, and the angle formed by the tangent line of the arc and the side wall of the fine cutting part is in accordance with the arrangement of the step angle.
Preferably, the chip grooves are spiral, and the rotation directions of the chip grooves are the same.
By adopting the scheme, the resistance is reduced, and the cutting efficiency is improved.
Preferably, the bit body is provided with 2 flutes.
Furthermore, the edge of the chip groove is provided with a cutting edge, and the cutting edges are connected through a chisel edge at the top end of the rough cutting part.
Preferably, the helical angle of the chip discharge groove is gamma, and the gamma is more than or equal to 20 degrees and less than or equal to 30 degrees.
More preferably, γ is 25 °.
By adopting the scheme, the plurality of chisel edges are connected with the cutting edge and run through from the top end, so that the resistance is reduced, and the cutting efficiency is improved; the chip removal groove has a small angle, so that smooth chip removal is ensured; the arrangement of the cross edge ensures that the drill bit for reducing the burrs can ensure the drilling function of the hole under high-speed drilling and can also carry out accurate positioning, so that the hole position is not deviated.
Further, the burr reducing drill bit further includes a base connected to the bit body.
By adopting the scheme, the base is used for connecting the drill bit for reducing the burrs with the drilling machine.
Further, the drill body and the base are integrally formed.
By adopting the scheme, the processing is convenient, and the drill bit strength of the burrs is ensured.
Preferably, the taper angle of the top end of the rough cutting part is β, and 110 degrees or more and β degrees or less and 130 degrees or less.
More preferably β ═ 120 °.
By adopting the scheme, the rough cutting part has better drilling performance and structural stability, and the service life is ensured.
Preferably, the width of the cutting edge of the chisel edge is d, and d is more than or equal to 0.9mm and less than or equal to 1.3 mm.
More preferably, d is 1.1 mm.
By adopting the scheme, the chisel edge has better drilling performance and durability.
Further, the ratio of the core thickness of the drill bit body to the outer diameter of the finish machining part is k, wherein k is greater than or equal to 1/5 and less than or equal to 3/10.
By adopting the scheme, raw materials are saved, the chip removal of the chip removal groove is smooth, the structure is stable, and the chip removal groove is not easy to deform.
Preferably, the difference between the outer diameters of the rough cutting part and the fine cutting part is L, and L is more than or equal to 0.8mm and less than or equal to 1.2 mm.
More preferably, L ═ 1 mm.
By adopting the scheme, the thickness of the step is half of the difference of the outer diameter, namely L/2, the difference of the outer diameter enables the drill bit with the reduced burrs to have better processing precision, the edge is smooth, and the processing quality is high.
Further, the deburring blade inclines downwards along the peripheral section of the finishing part to form a blade tip part and a blade edge part.
By adopting the scheme, the blade tip part has a smaller working area, and burrs can be effectively positioned for cutting; the edge portion trims the edge of the hole and cuts off burrs.
Preferably, the width of the edge tip part is q, and q is more than or equal to 1.1mm and less than or equal to 1.3 mm.
More preferably, q is 1.2 mm.
By adopting the scheme, the blade tip has better mechanical strength and longer service life.
Preferably, the included angle between the edge tip part and the cross section is delta, and delta is more than or equal to 7 degrees and less than or equal to 9 degrees.
More preferably, δ is 8 °.
Preferably, the included angle between the edge part and the cross section is theta, and theta is more than or equal to 10 degrees and less than or equal to 20 degrees.
More preferably, θ is 15 °.
By adopting the scheme, the edge tip part and the edge part are connected through a better line, the cutting is smoother, and the edge tip part has better durability when keeping better cutting efficiency.
Preferably, the rough portion has an outer diameter gradually decreasing toward a tip.
By adopting the scheme, the length of the chisel edge at the top end of the rough cutting part is shorter, the working area is reduced, the pressure is higher, the drilling efficiency is higher, and the positioning is more accurate.
The utility model discloses an on the other hand provides a drilling machine subassembly, including drilling machine and the drill bit of being connected with the drilling machine, the drill bit is the above-mentioned drill bit that reduces the burr.
Adopt above-mentioned scheme, because above-mentioned drill bit that reduces the burr has above-mentioned technological effect, the drilling machine subassembly that has the drill bit of above-mentioned reduction burr also should have corresponding technological effect.
To sum up, the utility model discloses following beneficial effect has:
1. the rough cutting part at the top end of the drill bit for reducing the burrs drills holes, and then the lower end fine cutting part removes redundant burrs, so that the combination of the rough cutting part and the fine cutting part can improve the surface quality of the holes, reduce the subsequent deburring procedures, reduce the processing cost and greatly improve the production efficiency;
2. the chip groove enables the step to form a segmented deburring edge, and the intersection of the chip groove and the step forms a main part for deburring, so that the chip groove is simple to prepare and firm in structure;
3. the chip removal groove is used for removing chips, so that chip accumulation is reduced, the precision of a hole is influenced, resistance is reduced, and the cutting efficiency is improved;
4. the deburring blade reduces the friction resistance of a horizontal plane, reduces the working area of the deburring blade, more accurately aligns the generated burrs, the inclined blade surface guides the chip to be removed, the punching success rate is improved, the deburring blade has a firmer structure, and the service life is prolonged;
5. the plurality of chisel edges are connected with the cutting edges and run through from the top end, so that resistance is reduced, and cutting efficiency is improved; the chip removal groove has a small angle, so that smooth chip removal is ensured; the arrangement of the cross edge ensures that the drill bit for reducing the burrs can ensure the drilling function of the hole under high-speed drilling and can also carry out accurate positioning, so that the hole position is not deviated;
6. the outer diameter difference enables the drill bit with the reduced burrs to have better machining precision, smooth edges and high machining quality;
7. the edge tip part and the edge part are connected through a better line, so that the cutting is smoother, and the edge tip part has better durability when keeping better cutting efficiency;
8. the edge tip part has a smaller working area, and burrs can be effectively positioned for cutting; the edge portion trims the edge of the hole and cuts off burrs.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of a prior art drill bit in use;
FIG. 2 is a schematic view of an embodiment of a burr reducing drill bit of an example;
FIG. 3 is an angled schematic view of one embodiment of a burr reducing drill bit of an example;
FIG. 4 is a schematic view of one embodiment of a burr reducing drill bit of example two;
FIG. 5 is a schematic cross-sectional view taken along line A-A of FIG. 2;
FIG. 6 is a schematic cross-sectional distance taken along line A-A of FIG. 2;
FIG. 7 is a schematic cross-sectional view taken along line B-B of FIG. 2;
FIG. 8 is a schematic cross-sectional view taken along line C-C of FIG. 7;
FIG. 9 is a schematic view of a burr reducing drill bit according to a second embodiment;
fig. 10 is a partially enlarged view of the region D of fig. 9.
Description of the reference numerals
Through the above reference sign explanation, combine the embodiment of the utility model, can more clearly understand and explain the technical scheme of the utility model.
1. A drill bit body; 11. a rough cutting part; 111. a chisel edge; 12. a finishing part; 121. removing the burr; 1211. a blade tip portion; 1212. A blade edge portion; 13. a chip groove; 131. a cutting edge; 14. a step; 2. a base; 3. burrs are formed.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
The present invention will be described in detail below by way of examples.
Examples of the experiments
During the preparation process of the drill bit for reducing the burrs, the applicant unexpectedly finds that when the plane of the top end of the step is inclined downwards to form the step into an acute angle, the success rate of cutting the burrs is higher, and the processing quality is better, and specific experiments are as follows.
The utility model provides a reduce drill bit of burr, includes the drill bit body, the drill bit body includes rough cutting portion and finish cutting portion, finish cutting portion external diameter is greater than rough cutting portion external diameter, be formed with the step between rough cutting portion and the finish cutting portion, be provided with at least one chip groove along the axial on the outer periphery of drill bit body, the chip groove link up finish cutting portion and rough cutting portion, the edge that chip groove and step are connected forms the deburring sword, step top plane downward sloping makes the step acutangular angle, establishes the step angle and is α, sets up different other step angles of different groups, carries out 1000 times and punches, and the inspection success rate of punching is succeeded to level with the hole edge, and no burr is accurate, the external diameter difference of rough cutting portion and finish cutting portion is 1 mm.
TABLE 1 success Rate of perforating at different step angles α
| Group of | Step angle α (°) | Success rate of perforation (%) |
| First group | 90 | 67 |
| Second group | 88 | 86 |
| Third group | 87.5 | 92 |
| Fourth group | 87 | 87 |
| Fifth group | 85 | 88 |
| Sixth group | 80 | 75 |
| Seventh group | 60 | 72 |
As can be seen from the results in Table 1, the top plane of the steps is inclined downwards to form acute angles (such as the second to the seventh groups), so that the drilling success rate is significantly improved (p < 0.01) compared with that of the right-angled steps (such as the first group), and the drilling success rate reaches a higher level when the angle is 85 DEG to α DEG to 88 DEG, wherein, the applicant finds that the burrs generated in the first group to the fifth group are respectively generated in a more uniform time without obvious aggregation of batches, while the drilling success is concentrated in the previous batches in the sixth group and the seventh group, and after the large batch drilling, the deburring edge is obviously worn to generate burrs or the hole edge is not smooth, so that the drilling effect is better when the angle is 85 DEG to α DEG to 88 DEG, and the service life of the burr-reducing drill is longer.
Example one
Referring to fig. 2, the utility model provides a reduce drill bit of burr, including drill bit body 1, drill bit body 1 includes rough cutting portion 11 and finish cutting portion 12, finish cutting portion 12 external diameter is greater than rough cutting portion 11 external diameter, be formed with step 14 between rough cutting portion 11 and the finish cutting portion 12, be provided with at least one chip groove 13 along the axial on the outer periphery of drill bit body 1, chip groove 13 link up finish cutting portion 12 and rough cutting portion 11, 14 top planes of step incline to the axis, make step 14 acutangulate, form sectional deburring sword 121.
By adopting the scheme, the rough cutting part 11 at the top end of the drill bit for reducing the burrs drills holes, then the lower end fine cutting part 12 removes the redundant burrs 3, the combination of the rough cutting part 11 and the fine cutting part 12 can improve the surface quality of the holes, the subsequent deburring 3 procedures are reduced, the processing cost is reduced, and the production efficiency is greatly improved; the chip groove 13 enables the step 14 to form a segmented deburring edge 121, and the intersection of the chip groove 13 and the step 14 forms a main part for removing the burr 3, so that the chip groove is simple to prepare and firm in structure; chip groove 13 is used for the chip removal, reduces the smear metal and piles up, influences the precision in hole, reduces the resistance, improves cutting efficiency.
Referring to fig. 3, in a preferred embodiment of the present embodiment, the angle of inclination of the top plane of the step 14 to the axis is set to α -87.5 °.
By adopting the scheme, the deburring blade 121 reduces the friction resistance of a horizontal plane, reduces the working area of the deburring blade 121, more accurately aligns the generated burrs 3, the inclined blade surface guides the chip removal, the punching success rate is improved, the deburring blade 121 is firmer in structure, and the service life is prolonged.
In a preferred embodiment of this embodiment, the top plane of the step 14 is concave in an arc shape, and the angle formed by the tangent line of the arc shape and the side wall of the finishing part 12 is in accordance with the setting of the angle of the step 14.
In a preferred embodiment of this embodiment, the flutes 13 are helical, and the flutes 13 are twisted in the same direction.
By adopting the scheme, the resistance is reduced, and the cutting efficiency is improved.
In a preferred embodiment of the present embodiment, the bit body 1 is provided with 2 flutes 13.
Referring to fig. 3, in a preferred embodiment of the present embodiment, the helix angle of the chip flutes 13 is γ, and γ is 25 °.
By adopting the scheme, the plurality of chisel edges 111 are connected with the cutting edge 131 and run through from the top end, so that the resistance is reduced, and the cutting efficiency is improved; the chip removal groove 13 is small in angle, so that smooth chip removal is guaranteed; the arrangement of the chisel edge 111 enables the burr-reduced drill bit to be accurately positioned while ensuring the drilling function of the hole under high-speed drilling, so that the hole position is not deviated.
In a preferred embodiment of the present embodiment, the taper angle of the tip of the rough cutting portion 11 is β — 120 °.
By adopting the scheme, the rough cutting part 11 has better drilling performance and structural stability, and the service life is ensured.
Referring to fig. 4 to 6, in a preferred embodiment of the present embodiment, the edge of the chip flute 13 is provided with a cutting edge 131, and the cutting edges 131 are connected by a chisel edge 111 at the top of the rough part 11.
In a preferred embodiment of the present embodiment, the width of the land of the chisel edge 111 is d, and d is 1.1 mm.
By adopting the scheme, the chisel edge 111 has better drilling performance and durability.
In a preferred embodiment of the present embodiment, k is 7/30 where k is a ratio of a core thickness of the drill body 1 to an outer diameter of the finishing part 12.
By adopting the scheme, raw materials are saved, the chip removal of the chip removal groove 13 is smooth, the structure is stable, and the deformation is not easy.
In a preferred embodiment of the present embodiment, the difference between the outer diameters of the rough-cut portion 11 and the finish-cut portion 12 is L, and L is 1 mm.
By adopting the scheme, the rough cutting part 11 and the fine cutting part 12 are coaxial, the thickness of the step 14 is half of the difference of the outer diameter, namely L/2, and the difference of the outer diameter enables the drill bit with the reduced burrs to have better processing precision, smooth edge and high processing quality.
In a preferred embodiment of this embodiment, the deburring blade 121 is inclined downward along an outer peripheral section of the finishing part 12 to form a cutting edge portion and a cutting edge portion.
By adopting the scheme, the blade tip part has a smaller working area, and the burr 3 can be effectively positioned to be cut off; the edge portion trims the hole edge, cutting off the burr 3.
Referring to FIGS. 7 and 8, in a preferred embodiment of this embodiment, the width of the cutting edge portion is defined as q, 1.1 mm. ltoreq. q.ltoreq.1.3 mm.
In a preferred embodiment of this embodiment, q is 1.2 mm.
By adopting the scheme, the blade tip has better mechanical strength and longer service life.
In a preferred embodiment of this embodiment, the cutting edge portion is arranged at an angle δ to the cross-section, which is equal to 8 °.
In a preferred embodiment of this embodiment, the angle between the edge portion and the cross section is θ, and θ is 15 °.
By adopting the scheme, the edge tip part and the edge part are connected through a better line, the cutting is smoother, and the edge tip part has better durability when keeping better cutting efficiency.
In a preferred embodiment of the present embodiment, the rough portion 11 has an outer diameter gradually decreasing toward a tip.
By adopting the scheme, the chisel edge 111 at the top end of the rough cutting part 11 is shorter in length, the working area is reduced, the pressure intensity is higher, the drilling efficiency is higher, and the positioning is more accurate.
Example two
Referring to fig. 2, the utility model provides a reduce drill bit of burr, including drill bit body 1, drill bit body 1 includes rough cutting portion 11 and finish cutting portion 12, finish cutting portion 12 external diameter is greater than rough cutting portion 11 external diameter, be formed with step 14 between rough cutting portion 11 and the finish cutting portion 12, be provided with at least one chip groove 13 along the axial on the outer periphery of drill bit body 1, chip groove 13 link up finish cutting portion 12 and rough cutting portion 11, 14 top planes of step incline to the axis, make step 14 acutangulate, form sectional deburring sword 121.
By adopting the scheme, the rough cutting part 11 at the top end of the drill bit for reducing the burrs drills holes, then the lower end fine cutting part 12 removes the redundant burrs 3, the combination of the rough cutting part 11 and the fine cutting part 12 can improve the surface quality of the holes, the subsequent deburring 3 procedures are reduced, the processing cost is reduced, and the production efficiency is greatly improved; the chip groove 13 enables the step 14 to form a segmented deburring edge 121, and the intersection of the chip groove 13 and the step 14 forms a main part for removing the burr 3, so that the chip groove is simple to prepare and firm in structure; chip groove 13 is used for the chip removal, reduces the smear metal and piles up, influences the precision in hole, reduces the resistance, improves cutting efficiency.
Referring to fig. 3, in a preferred embodiment of the present embodiment, the angle of inclination of the top plane of the step 14 to the axis is set to α ═ 85 °.
By adopting the scheme, the deburring blade 121 reduces the friction resistance of a horizontal plane, reduces the working area of the deburring blade 121, more accurately aligns the generated burrs 3, the inclined blade surface guides the chip removal, the punching success rate is improved, the deburring blade 121 is firmer in structure, and the service life is prolonged.
In a preferred embodiment of this embodiment, the top plane of the step 14 is concave in an arc shape, and the angle formed by the tangent line of the arc shape and the side wall of the finishing part 12 is in accordance with the setting of the angle of the step 14.
In a preferred embodiment of this embodiment, the flutes 13 are helical, and the flutes 13 are twisted in the same direction.
By adopting the scheme, the resistance is reduced, and the cutting efficiency is improved.
In a preferred embodiment of the present embodiment, the bit body 1 is provided with 2 flutes 13.
Referring to fig. 3, in a preferred embodiment of the present embodiment, the helix angle of the chip flutes 13 is γ, where γ is 20 °.
By adopting the scheme, the plurality of chisel edges 111 are connected with the cutting edge 131 and run through from the top end, so that the resistance is reduced, and the cutting efficiency is improved; the chip removal groove 13 is small in angle, so that smooth chip removal is guaranteed; the arrangement of the chisel edge 111 enables the burr-reduced drill bit to be accurately positioned while ensuring the drilling function of the hole under high-speed drilling, so that the hole position is not deviated.
In a preferred embodiment of the present embodiment, the taper angle of the tip of the rough cutting portion 11 is set to β ═ 110 °.
By adopting the scheme, the rough cutting part 11 has better drilling performance and structural stability, and the service life is ensured.
Referring to fig. 4 to 6, in a preferred embodiment of the present embodiment, the edge of the chip flute 13 is provided with a cutting edge 131, and the cutting edges 131 are connected by a chisel edge 111 at the top of the rough part 11.
In a preferred embodiment of the present embodiment, the width of the land of the chisel edge 111 is d, and d is 0.9 mm.
By adopting the scheme, the chisel edge 111 has better drilling performance and durability.
In a preferred embodiment of the present embodiment, k is 1/5 where k is a ratio of a core thickness of the drill body 1 to an outer diameter of the finishing part 12.
By adopting the scheme, raw materials are saved, the chip removal of the chip removal groove 13 is smooth, the structure is stable, and the deformation is not easy.
In a preferred embodiment of the present embodiment, the difference between the outer diameters of the rough-cut portion 11 and the finish-cut portion 12 is L, and L is 0.8 mm.
By adopting the scheme, the rough cutting part 11 and the fine cutting part 12 are coaxial, the thickness of the step 14 is half of the difference of the outer diameter, namely L/2, and the difference of the outer diameter enables the drill bit with the reduced burrs to have better processing precision, smooth edge and high processing quality.
In a preferred embodiment of this embodiment, the deburring blade 121 is inclined downward along an outer peripheral section of the finishing part 12 to form a cutting edge portion and a cutting edge portion.
By adopting the scheme, the blade tip part has a smaller working area, and the burr 3 can be effectively positioned to be cut off; the edge portion trims the hole edge, cutting off the burr 3.
Referring to fig. 7 and 8, in a preferred embodiment of the present embodiment, the width of the cutting edge portion is q, and q is 1.1 mm.
By adopting the scheme, the blade tip has better mechanical strength and longer service life.
In a preferred embodiment of this embodiment, the cutting edge portion is arranged at an angle δ to the cross-section, which is 7 °.
In a preferred embodiment of this embodiment, the edge portion forms an angle θ with the cross-section, where θ is 10 °.
By adopting the scheme, the edge tip part and the edge part are connected through a better line, the cutting is smoother, and the edge tip part has better durability when keeping better cutting efficiency.
In a preferred embodiment of the present embodiment, the rough portion 11 has an outer diameter gradually decreasing toward a tip.
By adopting the scheme, the chisel edge 111 at the top end of the rough cutting part 11 is shorter in length, the working area is reduced, the pressure intensity is higher, the drilling efficiency is higher, and the positioning is more accurate.
EXAMPLE III
Referring to fig. 2, the utility model provides a reduce drill bit of burr, including drill bit body 1, drill bit body 1 includes rough cutting portion 11 and finish cutting portion 12, finish cutting portion 12 external diameter is greater than rough cutting portion 11 external diameter, be formed with step 14 between rough cutting portion 11 and the finish cutting portion 12, be provided with at least one chip groove 13 along the axial on the outer periphery of drill bit body 1, chip groove 13 link up finish cutting portion 12 and rough cutting portion 11, 14 top planes of step incline to the axis, make step 14 acutangulate, form sectional deburring sword 121.
By adopting the scheme, the rough cutting part 11 at the top end of the drill bit for reducing the burrs drills holes, then the lower end fine cutting part 12 removes the redundant burrs 3, the combination of the rough cutting part 11 and the fine cutting part 12 can improve the surface quality of the holes, the subsequent deburring 3 procedures are reduced, the processing cost is reduced, and the production efficiency is greatly improved; the chip groove 13 enables the step 14 to form a segmented deburring edge 121, and the intersection of the chip groove 13 and the step 14 forms a main part for removing the burr 3, so that the chip groove is simple to prepare and firm in structure; chip groove 13 is used for the chip removal, reduces the smear metal and piles up, influences the precision in hole, reduces the resistance, improves cutting efficiency.
Referring to fig. 3, in a preferred embodiment of the present embodiment, the angle of inclination of the top plane of the step 14 to the axis is α ═ 88 °.
By adopting the scheme, the deburring blade 121 reduces the friction resistance of a horizontal plane, reduces the working area of the deburring blade 121, more accurately aligns the generated burrs 3, the inclined blade surface guides the chip removal, the punching success rate is improved, the deburring blade 121 is firmer in structure, and the service life is prolonged.
In a preferred embodiment of this embodiment, the top plane of the step 14 is concave in an arc shape, and the angle formed by the tangent line of the arc shape and the side wall of the finishing part 12 is in accordance with the setting of the angle of the step 14.
In a preferred embodiment of this embodiment, the flutes 13 are helical, and the flutes 13 are twisted in the same direction.
By adopting the scheme, the resistance is reduced, and the cutting efficiency is improved.
In a preferred embodiment of the present embodiment, the bit body 1 is provided with 2 flutes 13.
Referring to fig. 3, in a preferred embodiment of the present embodiment, the helix angle of the chip flutes 13 is γ, and γ is 30 °.
By adopting the scheme, the plurality of chisel edges 111 are connected with the cutting edge 131 and run through from the top end, so that the resistance is reduced, and the cutting efficiency is improved; the chip removal groove 13 is small in angle, so that smooth chip removal is guaranteed; the arrangement of the chisel edge 111 enables the burr-reduced drill bit to be accurately positioned while ensuring the drilling function of the hole under high-speed drilling, so that the hole position is not deviated.
In a preferred embodiment of the present embodiment, the taper angle of the tip of the rough cutting portion 11 is β ═ 130 °.
By adopting the scheme, the rough cutting part 11 has better drilling performance and structural stability, and the service life is ensured.
Referring to fig. 4 to 6, in a preferred embodiment of the present embodiment, the edge of the chip flute 13 is provided with a cutting edge 131, and the cutting edges 131 are connected by a chisel edge 111 at the top of the rough part 11.
In a preferred embodiment of the present embodiment, the width of the land of the chisel edge 111 is d, and d is 1.3 mm.
By adopting the scheme, the chisel edge 111 has better drilling performance and durability.
In a preferred embodiment of the present embodiment, k is 3/10 where k is a ratio of a core thickness of the drill body 1 to an outer diameter of the finishing part 12.
By adopting the scheme, raw materials are saved, the chip removal of the chip removal groove 13 is smooth, the structure is stable, and the deformation is not easy.
In a preferred embodiment of the present embodiment, the difference between the outer diameters of the rough-cut portion 11 and the finish-cut portion 12 is L, and L is 1.2 mm.
By adopting the scheme, the rough cutting part 11 and the fine cutting part 12 are coaxial, the thickness of the step 14 is half of the difference of the outer diameter, namely L/2, and the difference of the outer diameter enables the drill bit with the reduced burrs to have better processing precision, smooth edge and high processing quality.
In a preferred embodiment of this embodiment, the deburring blade 121 is inclined downward along an outer peripheral section of the finishing part 12 to form a cutting edge portion and a cutting edge portion.
By adopting the scheme, the blade tip part has a smaller working area, and the burr 3 can be effectively positioned to be cut off; the edge portion trims the hole edge, cutting off the burr 3.
Referring to fig. 7 and 8, in a preferred embodiment of the present embodiment, the width of the cutting edge portion is q, and q is 1.3 mm.
By adopting the scheme, the blade tip has better mechanical strength and longer service life.
In a preferred embodiment of this embodiment, the cutting edge portion is arranged at an angle δ to the cross-section, which is equal to 9 °.
In a preferred embodiment of this embodiment, the angle between the edge portion and the cross section is θ, and θ is 20 °.
By adopting the scheme, the edge tip part and the edge part are connected through a better line, the cutting is smoother, and the edge tip part has better durability when keeping better cutting efficiency.
In a preferred embodiment of the present embodiment, the rough portion 11 has an outer diameter gradually decreasing toward a tip.
By adopting the scheme, the chisel edge 111 at the top end of the rough cutting part 11 is shorter in length, the working area is reduced, the pressure intensity is higher, the drilling efficiency is higher, and the positioning is more accurate.
Example four
Referring to fig. 4, the present embodiment has substantially the same structure as the first embodiment, wherein the same reference numerals are used for the same components, except that: the burr reducing drill further comprises a base 2 connected to the drill body 1.
By adopting the scheme, the base 2 is used for connecting the drill bit for reducing burrs with the drilling machine.
In a preferred embodiment of the present embodiment, the bit body 1 is integrally formed with the base 2.
By adopting the scheme, the processing is convenient, and the drill bit strength of the burrs is ensured.
Referring to fig. 9 and 10, in the using process, the base 2 drives the drill bit body 1 to rotate at a high speed, so as to cut a workpiece, and the generated burrs 3 are cut by the deburring blade 121, thereby reducing the subsequent processing of the hole diameter burrs 3 and improving the processing quality.
EXAMPLE five
This embodiment provides a drilling machine subassembly, including drilling machine and the drill bit of being connected with the drilling machine, the drill bit is the above-mentioned drill bit that reduces the burr.
Adopt above-mentioned scheme, because above-mentioned drill bit that reduces the burr has above-mentioned technological effect, the drilling machine subassembly that has the drill bit of above-mentioned reduction burr also should have corresponding technological effect.
It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall into the protection scope of the claims of the present invention.
Claims (10)
1. A burr reducing drill bit, comprising: including drill bit body (1), drill bit body (1) is including rough cutting portion (11) and finish cutting portion (12), finish cutting portion (12) external diameter is greater than rough cutting portion (11) external diameter, be formed with step (14) between rough cutting portion (11) and finish cutting portion (12), be provided with at least one chip groove (13) along the axial on the outer periphery of drill bit body (1), chip groove (13) link up finish cutting portion (12) and rough cutting portion (11), step (14) top plane inclines to the axis, makes step (14) acutangulate, forms sectional deburring sword (121).
2. A burr reducing drill bit as set forth in claim 1, characterized in that the angle of inclination of the tip plane of the step (14) to the axis is α, 85 ° - α ° -88 °.
3. The burr reducing drill bit of claim 1, wherein: the edge of the chip groove (13) is provided with a cutting edge (131), and the cutting edges (131) are connected through a chisel edge (111) at the top end of the rough part (11).
4. The burr reducing drill bit of claim 1, wherein: the difference between the outer diameters of the rough cutting part (11) and the fine cutting part (12) is L, and L is more than or equal to 0.8mm and less than or equal to 1.2 mm.
5. The burr reducing drill bit of claim 1, wherein: the deburring blade (121) inclines downwards along the peripheral section of the finishing part (12) to form a blade tip part and a blade edge part.
6. The burr reducing drill bit of claim 5, wherein: and the width of the edge tip part is q, and q is more than or equal to 1.1mm and less than or equal to 1.3 mm.
7. The burr reducing drill bit of claim 6, wherein: the included angle between the edge tip part and the cross section is delta, and delta is more than or equal to 7 degrees and less than or equal to 9 degrees.
8. The burr reducing drill bit of claim 6, wherein: the included angle between the edge part and the cross section is theta, and theta is more than or equal to 10 degrees and less than or equal to 20 degrees.
9. The burr reducing drill bit of claim 1, wherein: the burr reducing drill further comprises a base (2) connected with the drill body (1).
10. A drill press assembly, comprising: comprising a drilling machine and a drill bit connected to the drilling machine, the drill bit being a burr reducing drill bit according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921725458.8U CN210789369U (en) | 2019-10-15 | 2019-10-15 | Drill bit capable of reducing burrs and drilling machine assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921725458.8U CN210789369U (en) | 2019-10-15 | 2019-10-15 | Drill bit capable of reducing burrs and drilling machine assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210789369U true CN210789369U (en) | 2020-06-19 |
Family
ID=71248511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921725458.8U Expired - Fee Related CN210789369U (en) | 2019-10-15 | 2019-10-15 | Drill bit capable of reducing burrs and drilling machine assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210789369U (en) |
-
2019
- 2019-10-15 CN CN201921725458.8U patent/CN210789369U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200619 |