Two-edge composite drill bit with corrected stepped cutting edges
By designing a two-edged compound drill bit that includes a stepped correction edge and a chip flute, the problems of chip entanglement and tool breakage caused by the concave step edge in the existing technology are solved, and the rapid discharge of iron chips and improvement of machining accuracy are achieved.
Patent Information
- Application Number
- CN202421148601.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-05-24
AI Technical Summary
When the existing two-edged composite drill bit with step edge correction is processed, the step edge is prone to be concave when processing threaded bottom holes or step counter holes, resulting in chip wrapping and cutting problems.
A two-edged composite drill bit including a first drill bit, a second drill bit, a stepped small core thickness and a stepped correction edge is designed. By setting the step correction edge and chip removal groove, the iron chips can be quickly discharged and the machining accuracy can be improved.
It effectively avoids the problem of tool breakage caused by entangled iron chips, ensures smooth discharge of iron chips during processing, and improves processing accuracy and drill bit service life.
Smart Images
Figure CN222385978U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of drill bits, in particular to a double-edged composite drill bit with a stepped cutting edge correction. Background Art
[0002] The step drill, also known as the step drill or pagoda drill, is mainly used for drilling holes in thin steel plates within 3 mm. One drill bit can replace multiple drill bits to process holes of different diameters as needed, and can complete large holes in one go without the need to replace the drill bit or drill positioning holes.
[0003] However, when using the existing two-edged composite drill with stepped cutting edge correction, when processing threaded bottom holes or stepped countersinks, the stepped cutting edge is sharp, the stepped cutting edge shape is concave due to the grooving process, and other reasons, resulting in chipping during the processing of the stepped cutting edge, or the second step diameter processing, and the tool surface being entangled with iron chips, which eventually leads to tool breakage due to poor chip removal. For this reason, we have designed a two-edged composite drill with stepped cutting edge correction to solve the above problems. Summary of the invention
[0004] The utility model aims to solve the shortcomings in the prior art and proposes a two-edge composite drill with a stepped cutting edge correction.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A two-edged composite drill with stepped cutting edge correction comprises a shank, one end of the shank is fixedly connected to a second drill bit, the outer side of the second drill bit is fixedly connected to a second stepped cutting edge, a second chip removal groove is provided on the outer side of the second drill bit away from the second stepped cutting edge, one end of the second drill bit is fixedly connected to a first drill bit, the outer side of the first drill bit is fixedly connected to a first stepped cutting edge, a first chip removal groove is provided on the outer side of the first drill bit away from the first stepped cutting edge, one end of the first drill bit is fixedly connected to a stepped small core thickness, and a stepped correction edge is fixedly connected between the first drill bit and the second drill bit.
[0007] Preferably, the shank comprises a second drill bit at one end of the shank, a first drill bit at one end of the second drill bit, and a stepped small core thickness connected to the first drill bit as an integrated structure.
[0008] Preferably, the first drill bit, the first step edge and the first chip groove are an integrated structure.
[0009] Preferably, the second drill bit, the second step edge and the second chip groove are an integrated structure.
[0010] Preferably, two of the first chip removal grooves and the second chip removal grooves are provided, and the two first chip removal grooves and the second chip removal grooves are arranged at equal distances.
[0011] Preferably, two of the first step edges and the second step edges are provided, and the outer surfaces of the two first step edges and the two second step edges are smooth.
[0012] Preferably, the first drill bit and the second drill bit are solid structures, and the diameter of the first drill bit is smaller than the diameter of the second drill bit.
[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the two-edged composite drill with stepped cutting edge correction, through the set stepped correction edge, when using the composite drill, the staff installs the shank of the drill on the drilling rig, when the drilling rig is running, only the first drill bit needs to be placed against the drilling position, and the first drill bit will drill the workpiece through the first stepped cutting edge, and the cut iron chips will be discharged through the first chip groove, when the hole is drilled to a certain depth, the second drill bit will expand the drilled hole, and the cut iron chips will be discharged through the second chip groove, and at the same time, the first drill bit and the cut iron pins will also enter the second chip groove through the first chip groove, because a stepped correction edge is set between the first drill bit and the second drill bit, and because the stepped correction edge is a straight cutting edge, the angle accuracy of the chamfer after processing is guaranteed; and it can also break the iron chips generated when the second stepped cutting edge is drilled, thereby avoiding the iron chips being entangled on the second drill bit during the processing, causing the composite drill bit to break. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the overall structure of a two-edge composite drill bit with stepped cutting edge correction proposed by the utility model;
[0015] Figure 2 A schematic diagram of the partial structure of the second drill bit of a two-edged composite drill bit with stepped cutting edge correction proposed by the utility model;
[0016] Figure 3 For this utility model Figure 1 A schematic diagram of the enlarged local structure at point A in the middle;
[0017] Figure 4 This is a schematic diagram of the partial structure of the first drill bit of a two-edged composite drill bit with stepped cutting edge correction proposed by the utility model.
[0018] In the figure: 1, shank; 2, second drill bit; 3, second step edge; 4, second chip groove; 5, first drill bit; 6, first step edge; 7, first chip groove; 8, step correction edge; 9, step small core thickness. DETAILED DESCRIPTION
[0019] In order to make the technical means, creative features, objectives and effects of the utility model easy to understand, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments.
[0020] Embodiment 1
[0021] Reference Figure 1-4 A two-edged composite drill with stepped cutting edge correction comprises a shank 1, a second drill bit 2 is fixedly connected to one end of the shank 1, a second stepped cutting edge 3 is fixedly connected to the outer side of the second drill bit 2, a second chip removal groove 4 is provided on the outer side of the second drill bit 2 away from the second stepped cutting edge 3, a first drill bit 5 is fixedly connected to one end of the second drill bit 2, a first stepped cutting edge 6 is fixedly connected to the outer side of the first drill bit 5, a first chip removal groove 7 is provided on the outer side of the first drill bit 5 away from the first stepped cutting edge 6, a stepped small core thickness 9 is fixedly connected to one end of the first drill bit 5, and a stepped correction cutting edge 8 is fixedly connected between the first drill bit 5 and the second drill bit 2.
[0022] In this embodiment, the shank 1 includes a second drill bit 2 at one end of the shank 1, a first drill bit 5 at one end of the second drill bit 2, and a stepped small core thickness 9 connected to the first drill bit 5 as an integrated structure. The composite drill bit with this structure can be processed without assembly, and is more sturdy and durable, and is not prone to breakage during the processing of the workpiece.
[0023] More specifically, the first drill bit 5, the first step edge 6 and the first chip groove 7 are an integrated structure. The first drill bit 5 with an integrated structural design is more durable and less prone to damage, so that the first drill bit 5 can better drill holes in the workpiece.
[0024] Among them, the second drill bit 2, the second step edge 3 and the second chip groove 4 are an integrated structure. The second drill bit 2 with an integrated structural design is more durable and less prone to damage, so that the second drill bit 2 can better expand the hole.
[0025] In this embodiment, two first chip grooves 7 and two second chip grooves 4 are provided, and the two first chip grooves 7 and second chip grooves 4 are arranged equidistantly. The first chip grooves 7 and the second chip grooves 4 can quickly discharge the cut iron pins to avoid the iron pins clogging the processing part and causing the drill bit to break.
[0026] More specifically, two first step edges 6 and two second step edges 3 are each provided, and the outer surfaces of the two first step edges 6 and second step edges 3 are smooth, so that the first step edges 6 and second step edges 3 can be sharper, so that the first step edges 6 and second step edges 3 can quickly cut the workpiece.
[0027] Among them, the first drill bit 5 and the second drill bit 2 are solid structures, and the diameter of the first drill bit 5 is smaller than the diameter of the second drill bit 2. The first drill bit 5 and the second drill bit 2 with solid structures are more sturdy and durable, and are not prone to breakage during use.
[0028] Working principle: After the utility model is installed, first check the installation and safety protection of the utility model. When using the composite drill bit, the staff installs the shank 1 of the drill bit on the drilling rig. When the drilling rig is running, it is only necessary to place the first drill bit 5 against the drilling position, and the first drill bit 5 will drill the workpiece through the first step edge 6, and the cut iron chips will be discharged through the first chip groove 7. When the hole is drilled to a certain depth, the second drill bit 2 will expand the drilled hole, and the cut iron chips will be discharged through the second chip groove 4. At the same time, the first drill bit 5 and the cut iron pins will also enter the second chip groove 4 through the first chip groove 7. Because a step correction edge 8 is provided between the first drill bit 5 and the second drill bit 2, and the step correction edge 8 is a straight edge, the angle accuracy of the chamfer after processing is guaranteed; and it can also break the iron chips generated when the second step edge 3 is used for drilling chips, thus completing the use process of the utility model. The utility model has a simple structure and is safe and convenient to use.
[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0031] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of protection claimed by the utility model. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A two-edged composite drill with a stepped edge correction, characterized in that: The drill bit (2) comprises a shank (1), one end of the shank (1) being fixedly connected to a second drill bit (2), the outer side of the second drill bit (2) being fixedly connected to a second step edge (3), the outer side of the second drill bit (2) being provided with a second chip removal groove (4), one end of the second drill bit (2) being fixedly connected to a first drill bit (5), the outer side of the first drill bit (5) being fixedly connected to a first step edge (6), the outer side of the first drill bit (5) being provided with a first chip removal groove (7), one end of the first drill bit (5) being fixedly connected to a stepped small core thickness (9), and a stepped correcting edge (8) being fixedly connected between the first drill bit (5) and the second drill bit (2).
2. A two-edged composite drill with stepped cutting edge correction according to claim 1, characterized in that: The shank (1) comprises a second drill bit (2) at one end of the shank (1), a first drill bit (5) at one end of the second drill bit (2), and a stepped small core thickness (9) connected to the first drill bit (5) as an integrated structure.
3. The two-edge composite drill with stepped edge correction according to claim 1, characterized in that: The first drill bit (5), the first step edge (6) and the first chip removal groove (7) are an integrated structure.
4. A two-edged composite drill with stepped cutting edge correction according to claim 1, characterized in that: The second drill bit (2), the second step edge (3) and the second chip removal groove (4) are an integrated structure.
5. The two-edge composite drill with stepped edge correction according to claim 1, characterized in that: Two of the first chip removal grooves (7) and the second chip removal grooves (4) are provided, and the two first chip removal grooves (7) and the two second chip removal grooves (4) are arranged at equal distances.
6. The two-edge composite drill with stepped edge correction according to claim 1, characterized in that: Two of the first step edges (6) and the second step edges (3) are provided, and the outer surfaces of the two first step edges (6) and the two second step edges (3) are smooth.
7. The two-edge composite drill with stepped cutting edge correction according to claim 1, characterized in that: The first drill bit (5) and the second drill bit (2) are solid structures, and the diameter of the first drill bit (5) is smaller than the diameter of the second drill bit (2).