CN213352320U - Carbide cross tool bit - Google Patents
Carbide cross tool bit Download PDFInfo
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- CN213352320U CN213352320U CN202021901353.6U CN202021901353U CN213352320U CN 213352320 U CN213352320 U CN 213352320U CN 202021901353 U CN202021901353 U CN 202021901353U CN 213352320 U CN213352320 U CN 213352320U
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Abstract
The utility model discloses a carbide cross tool bit, including main tool bit (1) and vice tool bit (2), main tool bit (1) with vice tool bit (2) mutually perpendicular forms the cross, main tool bit (1) top both sides are equipped with the main cutting edge, vice tool bit (2) both sides are equipped with the vice cutting edge, and both sides main cutting edge intersects top plane (3) (10) that forms, auxiliary range (24) of vice tool bit (2) are less than cutting scope (14) of main tool bit (1). When the main cutter head is cutting, the auxiliary cutter head follows, the main cutter head and the auxiliary cutter head carry out progressive work to the arc cutting edge, the main cutting edge and the auxiliary cutting edge are prevented from repeatedly influencing the efficiency by friction with scraps, the resistance generated by the main cutter head during working is reduced, the whole cutter head is more wear-resistant and is not easy to break, and the cutting efficiency of the cemented carbide cross cutter head is greatly improved.
Description
Technical Field
The utility model relates to a carbide makes and cutting tool technical field, especially relates to a carbide cross tool bit.
Background
The main tools for drilling concrete, bricks and granite in the current market are an electric hammer drill and an electric hammer drill bit which are matched for working. The working principle of the electric hammer drill is that the top hard alloy cutter head completes drilling or cutting operation through the rotation of the electric hammer drill. The electric hammer drill may be classified into a straight drill and a cross drill according to the kind of the hard alloy. After 20 years of development, the electric hammer drill head is mature, but the electric hammer drill head is not mature, so that a plurality of disadvantages exist.
The hard alloy cross cutter head mainly comprises a main blade and an auxiliary blade. The main blade is used for carrying out cutting action on the whole drill bit, and the auxiliary blade is used for carrying out auxiliary cutting when the main blade works.
Summarizing professional user feedback of decoration, bar planting and market strengthening in recent years, the cemented carbide cross cutter head is found to have the most fatal defect that the included angle of the head of the old cemented carbide cross cutter head is easy to break. The main reason for the major research is that the cutting diameter of the auxiliary tool bit of the old cemented carbide cross tool bit is as large as the diameter of the main tool bit, and the cutting angles on the two sides of the main tool bit and the auxiliary tool bit are vertical. Therefore, when the product works, partial stress can be transferred to the auxiliary cutter head which does not work when the main cutter head drills, the right angles on the two sides increase the resistance of drilling when the drill bit is used, and the structure is not wear-resistant and is easy to break when the drill bit works for a long time.
In summary, how to effectively solve the problem that the included angle of the head of the cemented carbide cross cutter head is easy to break is a problem which needs to be solved by the technicians in the field at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a carbide cross tool bit, this carbide cross tool bit's whole tool bit is more wear-resisting, and is difficult broken, has improved cutting efficiency greatly.
In order to solve the technical problem, the utility model provides a following technical scheme:
the utility model provides a carbide cross tool bit, includes main tool bit and vice tool bit, main tool bit with vice tool bit mutually perpendicular forms the cross, main tool bit top both sides are equipped with main cutting edge, vice tool bit both sides are equipped with vice cutting edge, and the crossing top plane that forms of both sides main cutting edge, the auxiliary range of vice tool bit is less than the cutting scope of main tool bit.
Preferably, the auxiliary range of the secondary cutter head is smaller than the cutting range of the primary cutter head by 0.2-0.5 mm.
Preferably, in the main cutter head, the included angle between the two main cutting edges is 135 degrees and 145 degrees; in the auxiliary tool bit, the included angle between the two auxiliary cutting edges is 140 degrees and 160 degrees.
Preferably, in the secondary cutter head, two secondary cutting edges are provided with chip flutes at one side close to the main cutting edge, the joint of the chip flutes and the main cutting edge is provided with a transition angle, and the range of the transition angle is 0.2-0.5.
Preferably, the included angle between the chip groove and the secondary cutting edge is 60-70 degrees, the size range of the upper end of the chip groove is 1-5mm, and the size range of the lower end of the chip groove is 0.2-2 mm.
Preferably, the main cutting edge is formed by intersecting a first main cutting face and a second main cutting face which are inclined to each other, wherein the area of the first main cutting face is larger than that of the second main cutting face, the first main cutting face and the second main cutting face of the two main cutting edges are centrosymmetric with respect to a tip plane, both sides of the first main cutting face and the second main cutting face are provided with cutting edges, and the inner side edge of the second main cutting face is provided with an end cutting edge.
Preferably, the angles of the first and second main cutting faces are 25 degrees and 50 degrees, respectively.
Preferably, the minor cutting edges comprise a first minor cutting face and a second minor cutting face which are obliquely intersected, wherein the area of the first minor cutting face is larger than that of the second minor cutting face, the first minor cutting face and the second minor cutting face of the two minor cutting edges are symmetrical around the center of the top end plane, the two sides of the first minor cutting face and the second minor cutting face are provided with cutting edges, and the first minor cutting face is a circular arc cutting face.
Preferably, the peripheral end surfaces of the first main cutting surface and the first auxiliary cutting surface are both end planes, and the angle of the planes is 4.5-12 degrees.
Preferably, the peripheral end surfaces of the second main cutting surface and the second auxiliary cutting surface are both arc surfaces, and a chamfer angle is arranged at the 1/3 arc position, and the chamfer angle is 4.5-12 degrees.
The utility model provides a carbide cross tool bit, including main tool bit and vice tool bit, main tool bit and vice tool bit mutually perpendicular form the cross, and the primary function of main tool bit is the cutting action that takes charge of whole drill bit, and vice tool bit is the cutting of assisting at main tool bit during operation. The main cutter head is equipped with main cutting edge in the top both sides, and the intersection of both sides main cutting edge forms the top plane, and the top that also is main cutter head is the plane, compares traditional main blade, and the top area is bigger, and intensity is higher, and main cutter head is more difficult broken. The auxiliary cutting edges are arranged on two sides of the main cutting head of the auxiliary cutting head, the two auxiliary cutting edges are symmetrically distributed about the top end plane, and the two main cutting edges are symmetrically distributed about the top end plane.
The auxiliary range of the auxiliary cutter head is smaller than the cutting range of the main cutter head, namely the length of the auxiliary cutting edge is smaller than that of the main cutting edge, and the auxiliary cutter head can effectively play an auxiliary role. When the main cutter head is cutting, the auxiliary cutter head follows, the main cutter head and the auxiliary cutter head carry out progressive work to the arc cutting edge, the main cutting edge and the auxiliary cutting edge are prevented from repeatedly influencing the efficiency by friction with scraps, the resistance generated by the main cutter head during working is reduced, the whole cutter head is more wear-resistant and is not easy to break, and the cutting efficiency of the cemented carbide cross cutter head is greatly improved.
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 front view of a cemented carbide cross bit according to an embodiment of the present invention;
FIG. 2 is a top view of a cemented carbide cross-head;
fig. 3 is a side view of a cemented carbide cross-bit.
The drawings are numbered as follows:
the cutting tool comprises a main tool bit 1, an auxiliary tool bit 2, an end plane 3, an arc surface 4, a top end plane 10, a first main cutting surface 11, a second main cutting surface 12, an end cutting edge 13, a cutting range 14, a first auxiliary cutting surface 21, a second auxiliary cutting surface 22, a chip discharge groove 23, an auxiliary range 24 and a transition angle 231.
Detailed Description
The core of the utility model is to provide a carbide cross tool bit, this carbide cross tool bit's whole tool bit is more wear-resisting, and is difficult broken, has improved cutting efficiency greatly.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 to 3, fig. 1 is a front view of a cemented carbide cross head according to an embodiment of the present invention; FIG. 2 is a top view of a cemented carbide cross-head; fig. 3 is a side view of a cemented carbide cross-bit.
In a specific embodiment, the utility model provides a carbide cross tool bit, including main tool bit 1 and vice tool bit 2, main tool bit 1 and vice tool bit 2 mutually perpendicular form the cross, and 1 top both sides of main tool bit are equipped with the main cutting edge, and 2 both sides of vice tool bit are equipped with the vice cutting edge, and the crossing top plane 10 that forms of both sides main cutting edge, the auxiliary range 24 of vice tool bit 2 is less than the cutting scope 14 of main tool bit 1.
In the structure, the hard alloy cross cutter head comprises a main cutter head 1 and an auxiliary cutter head 2, the main cutter head 1 and the auxiliary cutter head 2 are perpendicular to each other to form a cross shape, the main cutter head 1 is mainly used for carrying out cutting action on the whole drill, and the auxiliary cutter head 2 is used for carrying out auxiliary cutting when the main cutter head 1 works.
The secondary cutting edges 2 are provided on both sides of the primary cutting edge 1, symmetrically distributed about the top plane 10, and symmetrically distributed about the top plane 10.
The auxiliary extent 24 of the secondary cutting head 2 is smaller than the cutting extent 14 of the primary cutting head 1, i.e. the length of the secondary cutting edge is smaller than the length of the primary cutting edge, and the secondary cutting head 2 can more effectively assume an auxiliary role. When the main tool bit 1 is cutting, the auxiliary tool bit 2 follows up, and the main tool bit 1 and the auxiliary tool bit 2 work in a progressive mode to the arc cutting edge, so that the main cutting edge and the auxiliary cutting edge are prevented from repeatedly influencing efficiency by scrap friction, the resistance generated by the main tool bit 1 during working is reduced, the whole tool bit is more wear-resistant, is not easy to break, and the cutting efficiency of the cemented carbide cross tool bit is greatly improved.
Further optimizing the technical scheme, a person skilled in the art can change the above specific embodiment according to different specific situations, the overall size of the secondary tool bit 2 is smaller than that of the primary tool bit 1, and the auxiliary range 24 of the secondary tool bit 2 is smaller than the cutting range 14 of the primary tool bit 1 by any value between 0.2 mm and 0.5mm, including an end value, such as 0.3mm, so that the resistance generated by the primary tool bit 1 during operation can be reduced, and the secondary tool bit 2 can more effectively play an auxiliary role; the difference between the overall size of the auxiliary tool bit 2 and the overall size of the main tool bit 1 is kept small, and the normal use of the cemented carbide cross tool bit is not influenced.
On the basis of the above embodiments, the included angle α between the two main cutting edges in the main cutting head 1 is any value between 135 degrees and 145 degrees, including an endpoint value, such as 140 degrees, and the included angle β between the two secondary cutting edges in the secondary cutting head 2 is any value between 140 degrees and 160 degrees, including an endpoint value, such as 150 degrees. The inclination angle setting of main cutting edge and vice cutting edge is more reasonable, and the cutting area of two main cutting edges and two vice cutting edges increases, and is more wear-resisting, further improves cutting efficiency, prolongs carbide cross tool bit's life.
In another more reliable embodiment, on the basis of any one of the above embodiments, the two secondary cutting edges of the secondary tool bit 2 are provided with the chip discharge grooves 23 on the sides close to the primary cutting edges, when the primary tool bit 1 works, the secondary tool bit 2 follows, and the secondary cutting edges discharge waste chips through the chip discharge grooves 23 in the auxiliary cutting process, so that the overall cutting efficiency is improved. The chip groove 23 is closer to the main cutting edge, so that dust can be discharged more quickly, and the friction force of the drill during working is reduced.
Preferably, the joint of the chip groove 23 and the main cutting edge has a transition angle 231, the transition angle 231 is a rounded angle, the range of the transition angle 231 is any value between 0.2 and 0.5, including an end value, such as 0.3, the joint of the chip groove 23 and the main cutting edge has no edge angle, and is smooth, low in concentrated stress and strong; dust is not easy to remain, dust can be discharged more quickly, and resistance is reduced.
Further optimizing the technical scheme, the included angle between the chip groove 23 and the secondary cutting edge is an arbitrary value between 60 degrees and 70 degrees, including an endpoint value, such as 65 degrees, the size range of the upper end of the chip groove 23 is an arbitrary value between 1mm and 5mm, including an endpoint value, such as 3mm, the size range of the lower end is an arbitrary value between 0.2 mm and 2mm, including an endpoint value, such as 1mm, the difference between the size of the upper end and the size of the lower end of the chip groove 23 is large, the included angle between the chip groove 23 and the secondary cutting edge is large, chip removal is easy, and chip removal is thorough.
In another more reliable embodiment, based on any of the above embodiments, the main cutting edge is formed by intersecting a first main cutting face 11 and a second main cutting face 12 which are inclined to each other, wherein the area of the first main cutting face 11 is larger than the area of the second main cutting face 12, the first main cutting face 11 and the second main cutting face 12 of the two main cutting edges are symmetrical with respect to the center of the apical plane 10, and both side edges of the first main cutting face 11 and the second main cutting face 12 and the inner side edge of the second main cutting face 12 are provided with cutting edges.
In the above structure, the main cutting edge includes a first main cutting face 11 and a second main cutting face 12, the first main cutting face 11 and the second main cutting face 12 are inclined to each other and intersect each other, the first main cutting face 11 and the second main cutting face 12 are centrosymmetric with respect to the tip plane 10, and a cutting edge is formed at the side edges and the intersecting edge of the first main cutting face 11 and the second main cutting face 12.
The area of the first main cutting surface 11 is larger than that of the second main cutting surface 12, the main cutting edge is formed by intersecting cutting surfaces with different sizes and areas, the cutting surface with the larger area is the main cutting surface, namely, the first main cutting surface 11 is the main cutting surface, and is stressed in the cutting process, so that the wear resistance degree is larger.
In addition, the inner side edge of the second main cutting surface 12 is provided with an end cutting edge 13, which is one more than that of the traditional main blade, so that the cutting speed is higher, and the cutting efficiency is improved.
For the carbide cross-head of the above-described embodiments, the angles of the first main cutting surface 11 and the second main cutting surface 12 are 25 degrees and 50 degrees, respectively, which are more acute than the conventional angles of 25 degrees and 45 degrees.
In the case where other components are not changed, the minor cutting edge includes a first minor cutting surface 21 and a second minor cutting surface 22 which intersect obliquely, and the first minor cutting surface 21 and the second minor cutting surface 22 of the two minor cutting edges are symmetrical with respect to the center of the tip plane 10, and both the side edges and the intersection edge of the first minor cutting surface 21 and the second minor cutting surface 22 are cutting edges.
The area of the first minor cutting face 21 is larger than that of the second minor cutting face 22, and the first minor cutting face 21 is a main auxiliary face, and is stressed in the cutting process and has larger wear resistance.
Further optimizing the above technical scheme, the first minor cutting face 21 is an arc cutting face with a small radian, can maximally disperse the pressure applied during cutting, and can bear larger impact force than the traditional plane angle.
In any of the above embodiments, the peripheral end surfaces of the first major cutting surface 11 and the first minor cutting surface 21 are both end planes 3, and the angle of the planes is any value between 4.5 and 12 degrees, including the end points, and the optimal angle is 6 to 9 degrees, for example, 8 degrees, which can reduce the cutting resistance and improve the cutting efficiency.
In addition to any of the above embodiments, the peripheral end surfaces of the second main cutting surface 12 and the second auxiliary cutting surface 22 are arc surfaces 4, which follow the cutting path, so that the drilled hole is more round.
Preferably, a chamfer angle is arranged at the 1/3 arc, the chamfer angle is any value between 4.5 and 12 degrees, including an endpoint value, such as 8 degrees, and the hole diameter can conveniently discharge chips during drilling and cutting.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The hard alloy cross tool bit provided by the utility model is introduced in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a carbide cross tool bit, its characterized in that, includes main tool bit (1) and vice tool bit (2), main tool bit (1) with vice tool bit (2) mutually perpendicular forms the cross, main tool bit (1) top both sides are equipped with main cutting edge, vice tool bit (2) both sides are equipped with vice cutting edge, and the intersection of both sides main cutting edge forms top plane (10), auxiliary range (24) of vice tool bit (2) are less than cutting scope (14) of main tool bit (1).
2. Cemented carbide cross head according to claim 1, characterised in that the auxiliary range (24) of the secondary head (2) is 0.2-0.5mm smaller than the cutting range (14) of the main head (1).
3. The cemented carbide cross head as claimed in claim 1, wherein in the main head (1), the included angle between two main cutting edges is 135-145 degrees; in the auxiliary tool bit (2), the included angle between the two auxiliary cutting edges is 140 degrees and 160 degrees.
4. The carbide cross head as claimed in claim 1, wherein the minor cutting edges of the minor cutting head (2) are provided with chip flutes (23) on a side close to the major cutting edges, the connection of the chip flutes (23) and the major cutting edges having a transition angle (231), the transition angle (231) being in the range of 0.2-0.5.
5. The carbide cross head as claimed in claim 4, wherein the included angle between the chip groove (23) and the secondary cutting edge is 60-70 degrees, the size range of the upper end of the chip groove (23) is 1-5mm, and the size range of the lower end is 0.2-2 mm.
6. The cemented carbide cross-head according to any one of claims 1-5, characterised in that the main cutting edges are formed by the intersection of a first main cutting face (11) and a second main cutting face (12) inclined to each other, whereby the area of the first main cutting face (11) is larger than the area of the second main cutting face (12), and whereby the first main cutting face (11) and the second main cutting face (12) of both main cutting edges are centrally symmetrical with respect to the tip plane (10), whereby both sides of the first main cutting face (11) and the second main cutting face (12) are provided with cutting edges and the inner side of the second main cutting face (12) is provided with an end cutting edge (13).
7. Cemented carbide cross-head according to claim 6, characterised in that the angles of the first main cutting face (11) and the second main cutting face (12) are 25 degrees and 50 degrees, respectively.
8. The carbide cross bit according to claim 6, characterized in that the minor cutting edges comprise a first minor cutting face (21) and a second minor cutting face (22) intersecting obliquely, wherein the area of the first minor cutting face (21) is larger than the area of the second minor cutting face (22), and the first minor cutting face (21) and the second minor cutting face (22) of the two minor cutting edges are symmetrical with respect to the center of the tip plane (10), and both sides of the first minor cutting face (21) and the second minor cutting face (22) are provided with cutting edges, and the first minor cutting face (21) is a circular arc cutting face.
9. The carbide cross bit according to claim 8, characterized in that the peripheral end surfaces of the first main cutting surface (11) and the first minor cutting surface (21) are both end planes (3) with an angle of 4.5-12 degrees.
10. The cemented carbide cross bit as claimed in claim 8, characterised in that the peripheral end surfaces of the second main cutting surface (12) and the second auxiliary cutting surface (22) are each circular arc surfaces (4) and are chamfered at 1/3 circular arcs, the chamfer angle being 4.5-12 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021901353.6U CN213352320U (en) | 2020-09-03 | 2020-09-03 | Carbide cross tool bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021901353.6U CN213352320U (en) | 2020-09-03 | 2020-09-03 | Carbide cross tool bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213352320U true CN213352320U (en) | 2021-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021901353.6U Active CN213352320U (en) | 2020-09-03 | 2020-09-03 | Carbide cross tool bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213352320U (en) |
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2020
- 2020-09-03 CN CN202021901353.6U patent/CN213352320U/en active Active
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