Composite drill
By designing a multi-blade structure and cooling system for the composite drill, the problem of low efficiency in step-by-step hole and slot machining was solved, achieving efficient one-time forming machining, extending blade life and reducing costs.
Patent Information
- Application Number
- CN202423071430.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-12
AI Technical Summary
In the existing technology, the machining of holes and grooves requires the use of two separate cutting tools, resulting in low machining efficiency.
Design a composite drill comprising an integrally connected cutter body and shank, wherein the cutter body is provided with multiple inserts for simultaneously machining holes and grooves, and is equipped with a cooling structure to extend insert life, and the cutter body is flattened to reduce weight.
It enables one-time forming of holes and grooves, improving processing efficiency, extending the service life of cutting tools, and reducing tooling costs.
Smart Images
Figure CN223629556U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to tool technical field, in particular to a kind of composite drill. BACKGROUND
[0002] On the parts of automobile, in order to realize the connection and assembly between each component, there are many mechanical components with various holes 101, such as through hole, blind hole, threaded hole and the like, and the end face of hole 101 has sleeve groove 102 outside the hole simultaneously, such as shown in Figure 1 Wherein the hole 101 of a figure is blind hole, the hole 101 of b figure is through hole, and convex ring 103 is formed between hole and sleeve groove. At present, for this kind of hole groove combination, two tools are used to complete rough machining of hole and sleeve groove respectively, therefore, in order to improve processing efficiency, it is urgent to provide a special composite tool for processing this kind of hole groove combination. SUMMARY
[0003] The utility model solves the technical problems that: in order to overcome the insufficient in the prior art, the utility model provides a kind of composite drill, the composite drill can complete the machining of hole and sleeve groove simultaneously in the process of once processing.
[0004] The utility model solves the technical problems that: in order to overcome the insufficient in the prior art, the utility model provides a kind of composite drill, the composite drill can complete the machining of hole and sleeve groove simultaneously in the process of once processing.
[0005] Further, in order to realize the machining of hole, the first blade and the second blade are arranged in the same axial section of hole portion cutter body, and the first blade is arranged on the side of hole portion cutter body close to axis, and the second blade is arranged on the side of hole portion cutter body away from axis.
[0006] Further, in order to realize the machining of sleeve groove, the third blade and the fourth blade are radially symmetrically arranged on the two sides of groove portion cutter body, and close to the side of avoiding groove, and the fifth blade is arranged on the groove portion cutter body where the third blade or the fourth blade is located, and is located on the side away from avoiding groove, the width of avoiding groove and the width of convex ring formed between hole groove are matched.
[0007] Further, in order to cool each blade, prolong the service life of the blade, and timely dissipate the heat generated during machining, the cooling structure is further provided, which comprises a first cooling hole, a second cooling hole, a third cooling hole, a fourth cooling hole, an axial cooling channel and a radial cooling channel, wherein the first cooling hole is arranged at the top of the hole part body, the second cooling hole is arranged in the avoiding groove, and the first cooling hole and the second cooling hole are communicated with the axial cooling channel; the third cooling hole and the fourth cooling hole are arranged on the two sides of the groove part body in a radial manner, are respectively close to the positions of the third blade and the fourth blade, and the third cooling hole and the fourth cooling hole are communicated with the radial cooling channel; the axial cooling channel is arranged along the axis and extends from the shank to the hole part body; and the radial cooling channel is arranged at the end of the body close to the shank in a radial manner.
[0008] Further, in order to ensure that the third blade, the fourth blade and the fifth blade can be effectively cooled, the third cooling hole is arranged on the side of the groove part body away from the avoiding groove, and the fourth cooling hole is arranged on the side of the groove part body close to the avoiding groove.
[0009] Further, in order to facilitate chip removal, the chip removal groove is further arranged on the body.
[0010] Further, in order to reduce the weight of the body, the two sides of the body are flattened, the thickness between the two flattened sides is H, the flattened size of the body is too small to reduce the weight, and the flattened size is too large to affect the strength of the body, therefore, the thickness H is greater than the diameter of the hole part body and smaller than the inner diameter of the groove part body.
[0011] The composite drill has the advantages that the composite drill can integrally and roughly machine a hole and a surrounding groove at one time, improves machining efficiency, reduces the weight of the body by flattening, has a cooling water channel, and can replace the blades to prolong the service life and save the cost of the drill. BRIEF DESCRIPTION OF DRAWINGS
[0012] The utility model will be further described in connection with the drawings and examples.
[0013] Figure 1 It is a structure schematic view of a hole and a surrounding groove on a mechanical part to be machined.
[0014] Figure 2 It is a structure schematic view of the composite drill.
[0015] Figure 3 It is a structure schematic view of the composite drill.
[0016] Figure 4 It is a structure schematic view of the composite drill.
[0017] Figure 5It is the working process schematic diagram of the composite drill of the utility model.
[0018] In the figure: 101, hole, 102, sleeve groove, 103, convex ring, 1, handle, 2, cutter body, 2.1, hole part cutter body, 2.2, groove part cutter body, 3, first blade, 4, second blade, 5, third blade, 6, fourth blade, 7, fifth blade, 8, first cooling hole, 9, second cooling hole, 10, third cooling hole, 11, fourth cooling hole, 12, axial cooling channel, 13, radial cooling channel, 14, chip flute, 15, avoidance groove. DETAILED DESCRIPTION
[0019] The utility model will be explained further in detail now in combination with the drawings. These drawings are all simplified schematic diagrams, just with the schematic way to explain the basic structure of the utility model, therefore it just shows the structure related to the utility model, the direction and reference (for example, up, down, left, right and the like) can be just used to help the description of the features in the drawings. Therefore, the following specific embodiments are not in the restrictive sense, and the scope of the claimed subject matter is only limited by the appended claims and their equivalents.
[0020] As Figures 2-4 Shown, the utility model discloses a composite drill, including integrally connected cutter body 2 and handle 1, the cutter body 2 includes the hole part cutter body 2.1 being arranged in the middle and the groove part cutter body 2.2 being arranged in the periphery of hole part cutter body 2.1, the top of hole part cutter body 2.1 is equipped with the first blade 3 and second blade 4 for forming hole 101, the top of groove part cutter body 2.2 is equipped with the third blade 5, fourth blade 6 and fifth blade 7 for forming the sleeve groove 102 periphery of hole 101, the hole part cutter body 2.1 and groove part cutter body 2.2 form avoidance groove 15 between. The first blade 3 and second blade 4 are arranged in the same axial section of hole part cutter body 2.1, and the first blade 3 is arranged on the side of hole part cutter body 2.1 close to the axis, and the second blade 4 is arranged on the side of hole part cutter body 2.1 away from the axis. The third blade 5 and fourth blade 6 are radially symmetrically arranged on the groove part cutter body 2.2 on both sides, and close to the side of avoidance groove 15, and the fifth blade 7 is arranged on the groove part cutter body 2.2 where the third blade 5 or fourth blade 6 is located, and is located on the side away from avoidance groove 15, and the width of avoidance groove 15 matches the width of convex ring formed between hole groove. In the embodiment, the fifth blade 7 and fourth blade 6 are arranged on the same side.
[0021] As Figure 2 And Figure 3As shown, in order to cool each blade, prolong the service life of the blade, and timely dissipate the heat generated during processing, a cooling structure is further included, which comprises a first cooling hole 8, a second cooling hole 9, a third cooling hole 10, a fourth cooling hole 11, an axial cooling channel 12 and a radial cooling channel 13, wherein the first cooling hole 8 is arranged at the top of the hole part body 2.1, the second cooling hole 9 is arranged in the avoiding groove 15, and the first cooling hole 8 and the second cooling hole 9 are both communicated with the axial cooling channel 12; the third cooling hole 10 and the fourth cooling hole 11 are arranged in opposite positions on both sides of the groove part body 2.2, and are respectively close to the positions of the third blade 5 and the fourth blade 6; in this embodiment, the third cooling hole 10 is close to the third blade 5, and the fourth cooling hole 11 is close to the fourth blade 6 and the fifth blade 7, and the third cooling hole 10 and the fourth cooling hole 11 are both communicated with the radial cooling channel 13; the axial cooling channel 12 is arranged along the axis and extends from the shank 1 into the hole part body 2.1, and the radial cooling channel 13 is arranged along the radial direction at the end of the shank close to the shank 1. In order to ensure that the third blade 5, the fourth blade 6 and the fifth blade 7 can be effectively cooled, the third cooling hole 10 is arranged on the side of the groove part body 2.2 away from the avoiding groove 15, and the fourth cooling hole 11 is arranged on the side of the groove part body 2.2 close to the avoiding groove 15. In order to facilitate chip removal, the shank 2 is further provided with a chip removal groove 14. In order to reduce the weight of the shank 2, the two sides of the shank 2 are flattened, and the thickness between the two flattened sides is H. If the size of the flattened shank 2 is too small, the weight reduction effect is not achieved, and if the size of the flattened shank 2 is too large, the strength of the shank 2 is affected. Therefore, the thickness H is preferably greater than the diameter of the hole part body 2.1 and less than the inner diameter of the groove part body 2.2.
[0022] As Figure 4 shown, in this embodiment, the overall length L of the composite drill is 200 mm, the length L1 of the shank 1 is 80 mm, the height difference L2 between the hole part body 2.1 and the groove part body 2.2 is 45 mm, the length L3 of the groove part body 2.2 is 40 mm, the length of the hole part body 2.1 is L2+L3=85 mm, the machining diameter φ1 of the fifth blade 7 is 99.2±0.1 mm, the machining diameter φ2 of the third blade 5 and the fourth blade 6 is 69.8±0.1 mm, the machining diameter φ3 of the second blade 4 is 38.8±0.1 mm, and the diameter φ4 of the shank 1 is 50 mm. In this embodiment, the thickness H of the flattened shank is 50 mm. The size of the composite drill of the utility model includes but is not limited to the above-mentioned size, which can be adjusted according to the needs.
[0023] Working principle:
[0024] As Figure 5As shown, the red line is the contour line of the part to be machined, taking the machining of a through hole as an example, the inner hole is φ39.8mm, the depth is 33mm, the hole type is a through hole, the end face is an annular sleeve groove 102, the outer circle is φ100mm, the inner circle is φ69, and the groove depth is 25.5mm; the hole part cutter body 2.1 is 85mm long, the groove part cutter body 2.2 is 40mm long, and the height difference between the two is 45mm, and the hole depth to be machined is only 33mm. The composite drill is used to rough machine the hole and groove, and the hole 101 and the sleeve groove 102 are sequentially machined in sequence, the through hole is machined first, and after the through hole machining is completed, the sleeve groove 102 is machined by continuing to cut, wherein the first blade 3 and the second blade 4 are used to machine the through hole, the first blade 3 is close to the axis of the through hole to form a hole bottom, and the second blade 4 is close to the hole wall to form a hole bottom and the outer periphery of the hole wall. After the hole is roughly machined, the inner diameter is 38.8±0.1mm, that is, φ3; the third blade 5, the fourth blade 6 and the fifth blade 7 are used to machine the sleeve groove 102, the third blade 5 and the fourth blade 6 are used to form the inner wall of the sleeve groove 102 and the groove bottom on one side of the inner wall, and the fifth blade 7 is used to form the outer wall of the sleeve groove 102 and the groove bottom on one side of the outer wall. After the sleeve groove 102 is roughly machined, the inner diameter is 69.8±0.1mm, that is, φ2, and the outer diameter is 99.2±0.1mm, that is, φ1.
[0025] According to different hole and groove sizes, the sizes of the hole part cutter body 2.1, the groove part cutter body 2.2 and the avoidance groove 15 can be adjusted to adapt to the machining of different holes and grooves. In addition, the height difference between the hole part cutter body 2.1 and the groove part cutter body 2.2 can be compatible with the machining of holes of various depths, thereby reducing the number of tool configurations.
[0026] Based on the above ideal embodiments according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the scope of the present application. The technical scope of the present application is not limited to the contents in the specification, and the technical scope must be determined according to the scope of the claims.
Claims
1. A composite drill, characterized by: The tool body and the tool handle are integrally connected, the tool body comprises a hole part tool body arranged in the middle and a groove part tool body arranged at the periphery of the hole part tool body, the top of the hole part tool body is provided with a first blade and a second blade for forming a hole, the top of the groove part tool body is provided with a third blade, a fourth blade and a fifth blade for forming a peripheral sleeve groove of the hole, and an avoiding groove is formed between the hole part tool body and the groove part tool body.
2. The composite drill of claim 1, wherein: The first blade and the second blade are arranged in the same axial section of the hole part tool body, the first blade is arranged on the side of the hole part tool body close to the axis, and the second blade is arranged on the side of the hole part tool body away from the axis.
3. The composite drill of claim 1 wherein: The third blade and the fourth blade are radially symmetrically arranged on the groove part tool bodies on the two sides and close to the side of the avoiding groove, and the fifth blade is arranged on the groove part tool body where the third blade or the fourth blade is located and is located on the side away from the avoiding groove, the width of the avoiding groove matches the width of the convex ring formed between the hole groove.
4. The composite drill according to any one of claims 1 to 3, wherein: The tool body further comprises a cooling structure, the cooling structure comprises a first cooling hole, a second cooling hole, a third cooling hole, a fourth cooling hole, an axial cooling channel and a radial cooling channel, the first cooling hole is arranged at the top of the hole part tool body, the second cooling hole is arranged in the avoiding groove, and the first cooling hole and the second cooling hole are in communication with the axial cooling channel, the third cooling hole and the fourth cooling hole are radially arranged on the two sides of the groove part tool body and are close to the positions of the third blade and the fourth blade respectively, and the third cooling hole and the fourth cooling hole are in communication with the radial cooling channel, the axial cooling channel is arranged along the axis and extends from the tool handle into the hole part tool body, and the radial cooling channel is arranged at the end of the tool body close to the tool handle in the radial direction.
5. The composite drill of claim 4 wherein: The third cooling hole is arranged on the side of the groove part tool body away from the avoiding groove, and the fourth cooling hole is arranged on the side of the groove part tool body close to the avoiding groove.
6. The composite drill of claim 4 wherein: The tool body is further provided with a chip removal groove.
7. The composite drill of claim 4 wherein: The two sides of the tool body are flattened, the thickness between the two flattened sides is H, the thickness H is greater than the diameter of the hole part tool body and is less than the inner diameter of the groove part tool body.