Stepped cutting drill bit

Abstract

The utility model discloses a stepped cutting drill bit, which particularly relates to the field of drill bits and comprises a connector, one end of the connector is fixedly connected with a first drill bit, one end of the first drill bit is fixedly connected with a second drill bit, a connecting block is arranged at the joint of the first drill bit and the second drill bit, and the first drill bit and the second drill bit are coaxially arranged. Holes with different inner diameters can be drilled by arranging the drill bits with different sizes, and in the drilling process, generated scraps can be automatically cut off and are prevented from being accumulated in a notch, so that the scraps can be conveniently and automatically discharged in the drilling process of the drill bits, the drilling precision is improved, and the drilling efficiency is improved. And scraps can be prevented from remaining in the notches formed in the drill bit, so that the abrasion of the scraps to the drill bit is reduced, and the service life of the drill bit is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of drill bits, and more specifically, to a step-type cutting drill bit. Background Art

[0002] Drill bits are used to process the connection (fixing) holes of mechanical parts. The structure and performance of drill bits directly affect the processing quality and efficiency of holes. As mechanical processing technology moves towards precision and high-precision processing, higher requirements are placed on drilling efficiency and drilling quality.

[0003] The utility model patent with patent publication number CN215698247U discloses a cemented carbide step drill with equal helix angles. The setting of the utility model is convenient for providing a new type of drill bit so as to change the problem that the cutting angle of the existing drill tip edge is quite different from the cutting angle of the step edge, and it is convenient to quickly replace the first drill bit and the second drill bit according to the needs of the cutting work. The utility model solves the problem that the cutting angle of the drill tip edge is quite different from the cutting angle of the step edge.

[0004] However, when this structure is actually used, the chip grooves of the first drill bit and the second drill bit in this structure are connected, which may easily lead to waste chips in the drill bit during operation, resulting in friction between the chips and the drill bit, thereby reducing the service life and accuracy of the drill bit. Therefore, a step-type cutting drill bit is proposed. Utility Model Content

[0005] The technical solution of the utility model aims at solving the technical problem that the prior art solves too single a problem, and provides a solution that is significantly different from the prior art. In order to overcome the above-mentioned defects of the prior art, the utility model provides a stepped cutting drill bit to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a stepped cutting drill bit, comprising a connecting head, one end of which is fixedly connected to a first drill bit, one end of which is fixedly connected to a second drill bit, a connecting block is provided at the connection between the first drill bit and the second drill bit, and the first drill bit and the second drill bit are coaxially arranged.

[0007] It is connected to the equipment through a connecting head. During operation, the second drill body drills the workpiece, and the generated waste chips follow the second drill bit into the second chip guide groove. When in the second chip guide groove, when the other end of the waste chips is adhered to the workpiece, the connected waste chips are cut off by the second chip groove as the second drill bit drills, so that the cut waste chips are quickly discharged along the second chip guide groove. When it is necessary to drill a larger hole diameter, the second drill bit is lowered, and the connecting block is connected with the edge of the hole opened at the connection of the second drill bit, so that the first drill body can continue to drill the drilled hole smoothly, and the same waste chips are cut off by the first chip groove, and all the waste chips are discharged along the chip discharge port set at the top of the first chip guide groove. The chip discharge is smooth, which avoids the waste chips remaining in the drill bit during the processing, thereby reducing the wear of the drill bit by the waste chips, thereby improving the service life of the drill bit, and at the same time improving the processing accuracy.

[0008] Preferably, a connecting rod is fixedly connected between the first drill bit and the connecting head, and the diameter of the connecting rod is the same as the drilling diameter of the first drill bit.

[0009] Preferably, the first drill bit comprises a first drill body, and one end of the first drill body is fixedly connected to the connecting rod.

[0010] Two first chip guide grooves are provided, each of which is disposed on two sides of the first drill body, and the first chip guide grooves and the first drill body are both in a spiral structure.

[0011] Two chip removal openings are respectively arranged at one end of each first chip guide groove.

[0012] The first chip groove is opened around the first drill body, and the first chip groove is opened in a spiral shape.

[0013] Preferably, the second drill bit comprises a second drill body, one end of the second drill body is connected to the other end of the first drill body.

[0014] Two second chip guide grooves are provided, each of which is arranged on two sides of the second drill body, and the second chip guide grooves and the second drill body are both in a spiral structure.

[0015] The second chip groove is opened around the second drill body and the second chip groove is opened in a spiral shape.

[0016] Preferably, the two first chip guide grooves and the two second chip guide grooves are connected correspondingly, and the distances from the bottom of the first chip guide groove and the bottom of the two second chip guide grooves to the axis are the same.

[0017] Preferably, the connecting block is triangular in shape, and the upper and lower ends of the connecting block are respectively connected to the edges of the first drill body and the second drill body.

[0018] Technical effects and advantages of the utility model:

[0019] 1. Compared with the prior art, the first drill body, the second drill body, the chip guide groove, the chip groove and the chip discharge port are arranged to cut the waste chips connected to the workpiece during the processing to avoid the waste chips from sticking. At the same time, the chip guide groove inside the drill bit is connected so that the waste chips can be discharged smoothly, thereby preventing the waste chips from remaining in the drill bit, thereby improving the chip removal efficiency, reducing the wear of the waste chips on the drill bit, thereby increasing the service life of the drill bit, and also improving the processing accuracy;

[0020] 2. By forming a connection block at the connection between the first drill bit and the second drill bit, compared with the prior art, when the first drill bit and the second drill bit are processed synchronously, the drilling connection between the two drill bits has a higher degree of coordination, thereby improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0022] Figure 2 It is a schematic diagram of the front structure of the drill bit of the utility model when it is placed horizontally.

[0023] Figure 3 It is a schematic diagram of the planar structure of the drill bit of the utility model when viewed from above.

[0024] The accompanying drawings are marked as follows: 1. Connecting head; 2. First drill bit; 201. First drill body; 202. First chip guide groove; 203. Chip removal port; 204. First chip groove; 3. Second drill bit; 301. Second drill body; 302. Second chip guide groove; 303. Second chip groove; 4. Connecting block. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] As attached Figure 1-3The step-type cutting drill shown in the figure comprises a connecting head 1, one end of which is fixedly connected to a first drill bit 2, one end of which is fixedly connected to a second drill bit 3, a connecting block 4 is provided at the connection between the first drill bit 2 and the second drill bit 3, the first drill bit 2 and the second drill bit 3 are coaxially arranged, and connected to the equipment through the connecting head 1. During operation, the second drill body 301 drills the workpiece, and the generated waste chips flow along the second drill bit 3 into the second chip guide groove 302. When the other end of the waste chips is adhered to the workpiece in the second chip guide groove 302, the waste chips connected to the workpiece are removed by the second chip groove 303 as the second drill bit 3 drills. The chips are cut off and then quickly discharged along the second chip guide groove 302. When a larger hole diameter needs to be drilled, the second drill bit 3 is lowered, and the connecting block 4 is connected with the edge of the hole opened at the connection of the second drill bit 3, so that the first drill body 201 can smoothly continue to drill the drilled hole, and the waste chips generated are cut off by the first chip groove 204, and all the waste chips generated are discharged along the chip discharge port 203 set at the top of the first chip guide groove 202. The chip discharge is smooth, which avoids the waste chips from remaining in the drill bit during the processing, thereby reducing the wear of the drill bit by the waste chips, thereby increasing the service life of the drill bit and improving the processing accuracy.

[0027] As attached Figure 1 As shown, a connecting rod is fixedly connected between the first drill bit 2 and the connecting head 1 , and the diameter of the connecting rod is the same as the drilling diameter of the first drill bit 2 .

[0028] As attached Figure 2 As shown, the first drill bit 2 includes a first drill body 201, and one end of the first drill body 201 is fixedly connected to the connecting rod.

[0029] Two first chip guide grooves 202 are provided on both sides of the first drill body 201 , and the first chip guide grooves 202 and the first drill body 201 are both in a spiral structure, so as to facilitate the transportation of waste chips.

[0030] Two chip discharge openings 203 are respectively opened at one end of each first chip guide groove 202, so as to quickly discharge the generated waste chips without obstruction.

[0031] The first chip groove 204 is formed around the first drill body 201 and is formed in a spiral shape so as to cut off the waste chips adhering to the workpiece, thereby facilitating the discharge of the waste chips and avoiding continuous friction on the drill bit.

[0032] As attached Figure 2 As shown, the second drill bit 3 includes a second drill body 301 , and one end of the second drill body 301 is connected to the other end of the first drill body 201 .

[0033] Two second chip guide grooves 302 are provided on both sides of the second drill body 301 , and the second chip guide grooves 302 and the second drill body 301 are both in a spiral structure, so as to facilitate the conveyance of waste chips.

[0034] The second chip groove 303 is formed around the second drill body 301 and is formed in a spiral shape so as to cut off the waste chips adhering to the workpiece, thereby facilitating the discharge of the waste chips and avoiding continuous friction on the drill bit.

[0035] As attached Figure 2 As shown, the two first chip guide grooves 202 and the two second chip guide grooves 302 are respectively connected correspondingly, and the distance from the bottom of the first chip guide groove 202 and the two second chip guide grooves 302 to the axis is the same, so that when the first drill bit 2 and the second drill bit 3 work synchronously, the generated waste chips can be discharged smoothly, avoiding the dead corner in the drill bit that causes waste chips to remain.

[0036] As attached Figure 2 As shown, the connecting block 4 is triangular in shape, and the upper and lower edges of the connecting block 4 are respectively connected to the edges of the first drill body 201 and the second drill body 301, so that the first drill bit 2 and the second drill bit 3 can cooperate during deep processing, avoiding the situation in which the overall resistance of the drill bit increases instantly during the drilling process.

[0037] The working principle of the utility model is as follows: when the step-type cutting drill bit is used to drill a workpiece, it is connected to the equipment through the connecting head 1. During operation, the second drill body 301 drills the workpiece, and the generated waste chips enter the second chip guide groove 302 along the second drill bit 3. When the waste chips are in the second chip guide groove 302, when the other end of the waste chips is adhered to the workpiece, the second chip groove 303 cuts off the connected waste chips as the second drill bit 3 drills, so that the cut waste chips are quickly discharged along the second chip guide groove 302. When drilling is required When drilling a larger hole, the connecting block 4 is connected to the edge of the hole opened at the connection of the second drill bit 3 during the process of the second drill bit 3 descending, so that the first drill body 201 can smoothly continue to drill the hole to be drilled, and the waste chips generated are cut off by the first chip groove 204, and all the waste chips generated are discharged along the chip discharge port 203 set at the top of the first chip guide groove 202. The chip discharge is smooth, which avoids the waste chips from remaining in the drill bit during the processing, thereby reducing the wear of the drill bit by the waste chips and thus increasing the service life of the drill bit, while also improving the processing accuracy.

[0038] The utility model can drill holes with different inner diameters by arranging drill bits of different sizes, and can automatically cut off waste chips generated during the drilling process to avoid waste chip connection, thereby facilitating automatic discharge of waste chips during the drilling process of the drill bit to avoid adhesion to the drill bit, thereby improving the drilling accuracy and preventing waste chips from remaining in the grooves opened on the drill bit, thereby reducing the wear of the drill bit by waste chips and increasing the service life of the drill bit.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A step-cutting drill bit, comprising a connector (1), characterized in that: One end of the connector (1) is fixedly connected to a first drill bit (2), one end of the first drill bit (2) is fixedly connected to a second drill bit (3), a connecting block (4) is provided at the connection between the first drill bit (2) and the second drill bit (3), and the first drill bit (2) and the second drill bit (3) are coaxially arranged; A connecting rod is fixedly connected between the first drill bit (2) and the connecting head (1), and the diameter of the connecting rod is the same as the drilling diameter of the first drill bit (2); The first drill bit (2) comprises a first drill body (201), one end of the first drill body (201) being fixedly connected to a connecting rod; Two first chip guide grooves (202), each of the first chip guide grooves (202) is arranged on both sides of the first drill body (201), and the first chip guide grooves (202) and the first drill body (201) both have a spiral structure; Two chip removal openings (203), each of the chip removal openings (203) being respectively opened at one end of each first chip guide groove (202); A first chip groove (204), wherein the first chip groove (204) is opened around the first drill body (201), and the first chip groove (204) is opened in a spiral shape; The second drill bit (3) comprises a second drill body (301), one end of the second drill body (301) being connected to the other end of the first drill body (201); Two second chip guide grooves (302), each of the second chip guide grooves (302) is opened on both sides of the second drill body (301), and the second chip guide grooves (302) and the second drill body (301) are both in a spiral structure; A second chip groove (303), wherein the second chip groove (303) is opened around the second drill body (301), and the second chip groove (303) is opened in a spiral shape.

2. A step cutting drill bit according to claim 1, characterized in that: The two first chip guide grooves (202) and the two second chip guide grooves (302) are respectively connected to each other, and the distances from the bottom of the first chip guide groove (202) and the bottom of the two second chip guide grooves (302) to the axis are the same.

3. A step cutting drill bit according to claim 2, characterized in that: The connecting block (4) is triangular in shape, and the upper and lower ends of the connecting block (4) are respectively connected to the edges of the first drill body (201) and the second drill body (301).

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