Lathe composite counter bit

Abstract

The utility model provides a composite counter bit of a lathe, and belongs to the technical field of drill bits. The problem that the machining precision of a blade on an existing counter bit is difficult to adjust is solved. The combined machining part is arranged on the cutter body of the combined counter bit, the combined machining part is integrally formed, the multiple cutting edges are arranged on the combined machining part, the multiple cutting edges can be configured and designed according to actual machining requirements of machined workpieces, and the multiple cutting edges represent that multiple working procedures can be machined; according to the composite countersink drill, all the cutting edges are integrated on one carrier, namely the composite machining part, so that subsequent independent precision adjustment of each cutting edge is avoided, and the machining precision of the whole countersink drill is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of drill bit technology, and relates to a drill bit, and more particularly to a countersinking drill. Background Technology

[0002] Countersinks are mainly used for machining the end faces of holes, creating flat, cylindrical, conical, and other profiled surfaces. In particular, compound countersinks, which can both drill and chamfer workpieces, are widely used. Existing compound countersinks typically combine multiple cutting inserts on the drill bit to meet the workpiece's cutting requirements. These inserts are often independent, each individually fixed to the drill bit, and each insert corresponds to a specific machining operation. Therefore, after fixing the inserts, each insert needs to be precision-calibrated. Since there is a certain calibration error between each insert, the cumulative calibration errors of multiple inserts can lead to a large and difficult-to-eliminate overall machining error in the countersink. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a composite countersink for lathes. It solves the technical problem of difficulty in adjusting the machining accuracy of cutting tools in existing countersinks.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A composite countersink for lathes includes a blade with a drill bit at its front end. The blade is characterized in that it has a composite machining section near the drill bit, the composite machining section having multiple integrally formed cutting edges arranged sequentially along the length of the blade, the multiple cutting edges being distributed from the side near the drill bit to the side of the blade in ascending order.

[0006] The composite countersink of this application has a composite machining section on its blade. The composite machining section is integrally formed and includes multiple cutting edges. These multiple cutting edges can be configured and designed according to the actual machining requirements of the workpiece. Multiple cutting edges represent the ability to perform multiple processes, such as chamfering, turning, and tapping. This composite countersink integrates all the cutting edges onto a single carrier, namely the composite machining section. This avoids the need for separate precision adjustments to each cutting edge, thereby significantly improving the overall machining accuracy of the countersink.

[0007] In the aforementioned lathe composite countersink, the composite machining section has a stepped structure and at least three adjacent cutting edges, which are, in order, a chamfering edge one, a milling cutter edge, and a chamfering edge two.

[0008] The composite machining section of this application has a stepped structure, which is equivalent to a composite blade that combines multiple conventional blades into one. The different heights of the steps can facilitate the integration of various cutting edges to meet different processing requirements.

[0009] In the aforementioned lathe composite countersink, the milling cutter edge and the second chamfering edge are in contact with each other, and the diameters of the cutting surfaces formed by the milling cutter edge and the second chamfering edge during rotation are both larger than the diameter of the cutting surface formed by the first chamfering edge during rotation.

[0010] The chamfering blade one of this application can chamfer holes or grooves with smaller diameters. The milling cutter blade and the chamfering blade two are in contact with each other, that is, the milling cutter blade can bore holes or grooves, and then the chamfering blade two can be used to chamfer the holes or grooves. This design can simplify and integrate multiple processing steps, and there is no need to change tools, making the processing very convenient.

[0011] In the aforementioned composite countersinking drill for lathes, the composite machining part is an alloy tool body with a mounting groove. The alloy tool body is fixed in the mounting groove, and multiple cutting edges protrude from the mounting groove.

[0012] The composite machining part of this application is an alloy cutting tool body, which is detachably connected to the cutting tool body. Multiple cutting edges are distributed on the alloy cutting tool body. Before production and processing, the alloy cutting tool body can be designed according to the processing requirements, and each cutting edge can be designed according to the requirements. In this way, the structure and relative position of multiple cutting edges are not changed by forming multiple cutting edges in one piece, eliminating the need for individual adjustment of each cutting edge in the later stage, and greatly improving the overall processing accuracy.

[0013] The alloy tool body is detachable and replaceable, and can be replaced individually after wear or damage occurs during machining. This significantly improves the overall tool usage cost. Furthermore, the integration of multiple cutting edges increases the overall size of the alloy tool body, which in turn enhances the stability of the overall installation and significantly strengthens the structural strength of the alloy tool body.

[0014] In the aforementioned composite countersinking drill for lathes, the composite machining part is a stepped protrusion integrally formed with the tool body.

[0015] This is another embodiment of the composite machining part of this application. In this embodiment, the composite machining part and the blade are an integral structure. The advantage of this design is that the error of the cutting edge is smaller at all parts of the overall tool.

[0016] In the aforementioned lathe composite countersink, the first and second chamfering cutting edges have the same inclination angle, both being 45°.

[0017] The chamfering blade one and chamfering blade two of this application are both inclined at 45°. The chamfering blade one and chamfering blade two are at different heights in different positions on the step, and the diameter of the cutting surface formed during the rotation is different. Since the chamfering blade one and chamfering blade two are integrated, the concentricity is high, and the chamfering accuracy for different hole diameters on the same workpiece is extremely high.

[0018] In the aforementioned lathe composite countersink drill, the length of the milling cutter cutting edge is 3±0.05mm.

[0019] The length of the milling cutter edge in this application is 3±0.05mm. This milling cutter edge is relatively short, and the milling cutter edge is adjacent to the chamfering edge. This design allows for boring and chamfering of concentric composite holes without changing tools. The machining of composite concentric holes can be completed in one step, which is highly efficient and has good machining accuracy.

[0020] In the aforementioned composite countersinking drill for lathes, the drill bit has a limiting groove near the alloy cutter body, and the alloy cutter body has a protruding stop portion. The stop portion is fitted into the limiting groove, and the side of the stop portion is in close contact with the groove wall of the limiting groove.

[0021] The drill bit of this application has a limiting groove near the alloy cutter body. The alloy cutter body has a retaining part that mates with the limiting groove. The retaining part fits tightly with the limiting groove, allowing the alloy cutter body to be tightly integrated with the tool body and the tool frame, thus effectively reducing vibration or trembling of the alloy cutter body and further improving machining accuracy. Simultaneously, the retaining groove during installation also ensures better overall precision in the installation of the alloy cutter body.

[0022] In the aforementioned lathe composite countersink, a central hole is provided at the center of the cutting tool body, and a mating part protrudes from the end of the drill bit, through which the drill bit is embedded into the inner side of the central hole.

[0023] In the aforementioned lathe composite countersink drill, the drill bit has a diameter of φ14mm, a main body length of 28.8mm, and an end cutting edge inclination angle of 60°.

[0024] The beneficial effects of this utility model are:

[0025] 1. This composite countersink integrates all the cutting edges onto a single carrier, namely the composite machining unit. This avoids the need for separate precision adjustments to each cutting edge, thereby significantly improving the overall machining accuracy of the countersink.

[0026] 2. The alloy blade body and the blade body of this application are detachably connected, and multiple cutting edges are distributed on the alloy blade body. The alloy blade body can be designed according to the processing requirements before production and processing. In this way, the structure and relative position of multiple cutting edges are not changed by forming multiple cutting edges in one piece, eliminating the need for individual adjustment of each cutting edge in the later stage, and greatly improving the overall processing accuracy.

[0027] 3. The drill bit of this application has a limiting groove near the alloy cutter body. The alloy cutter body has a stop part that cooperates with the limiting groove. The stop part and the limiting groove are tightly fitted, which can make the alloy cutter body tightly integrated with the cutter body and the cutter body. This can effectively reduce the vibration or trembling of the alloy cutter body and further improve the machining accuracy. Attached Figure Description

[0028] Figure 1 This is a partial cross-sectional schematic diagram of the composite countersink of this utility model.

[0029] In the diagram: 1. Cutting tool body; 11. Mounting groove; 12. Mating part; 2. Cutting tool body; 21. Limiting groove; 22. Mating part; 3. Composite machining part; 31. Composite machining part; 32. Milling cutter edge; 33. Milling cutter edge; 34. Stop part. Detailed Implementation

[0030] Example 1

[0031] like Figure 1 The lathe composite countersink drill shown includes a cylindrical cutter body 1, with a shank at the rear for connecting to a cutter head. A central hole 12 is formed at the center of the front section of the cutter body 1. A mating part 22 protrudes from the end of the drill bit 2, and the drill bit 2 is inserted into the center hole 12 through the mating part 22. The connection between the mating part 22 and the cutter body 1 is preferably a spline connection, a pin connection, or other connection method with a locking function. The drill bit 2 has a diameter of φ14mm, a body length of 28.8mm, and a cutting edge inclination angle of 60°.

[0032] Furthermore, the cutting body 1 has a composite machining section 3 near the drill bit 2. The composite machining section 3 has multiple integrally formed cutting edges arranged sequentially along the length of the cutting body 1. These cutting edges are distributed from the side near the drill bit 2 to the side where the cutting body 1 is located, in ascending order. The composite countersink of this application has a composite machining section 3 on the cutting body 1. The composite machining section 3 is integrally formed and includes multiple cutting edges. These multiple cutting edges can be configured and designed according to the actual processing requirements of the workpiece. Multiple cutting edges represent the ability to perform multiple processing steps, such as chamfering, turning, and tapping. This composite countersink integrates all the cutting edges onto a single carrier, namely the composite machining section 3. This avoids the need for separate precision adjustments to each cutting edge, thereby significantly improving the overall processing accuracy of the countersink.

[0033] Furthermore, the composite machining section 3 has a stepped structure and three adjacent cutting edges, which are, in order, a chamfering edge 31, a milling cutter edge 32, and a chamfering edge 33. The stepped structure of the composite machining section 3 in this application is equivalent to a composite cutting tool that combines multiple conventional cutting tools into one. The different heights of the steps facilitate the integration of various cutting edges to meet different machining requirements.

[0034] Furthermore, the milling cutter edge 32 and the second chamfering edge 33 are in contact with each other, and the diameters of the cutting surfaces formed by the milling cutter edge 32 and the second chamfering edge 33 during rotation are both larger than the diameter of the cutting surface formed by the first chamfering edge 31 during rotation. The first chamfering edge 31 of this application can chamfer holes or grooves with smaller diameters. The milling cutter edge 32 and the second chamfering edge 33 are in contact with each other, meaning that the milling cutter edge 32 can bore holes or grooves, and then the second chamfering edge 33 can be used to chamfer the hole or groove. This design simplifies and integrates multiple machining processes without requiring tool changes, making machining very convenient.

[0035] Furthermore, the composite machining part 3 is an alloy cutter body, and the cutter body 1 has a mounting groove 11. The alloy cutter body is fixed in the mounting groove 11, and multiple cutting edges protrude from the mounting groove 11. The composite machining part 3 of this application is an alloy cutter body, which is detachably connected to the cutter body 1. Multiple cutting edges are distributed on the alloy cutter body. Before production, the alloy cutter body can be designed according to the processing requirements, and each cutting edge can be designed according to the requirements. In this way, the structure and relative position of the multiple cutting edges are not changed due to the integral molding of multiple cutting edges, eliminating the need for individual adjustment of each cutting edge later, thus greatly improving the overall processing accuracy. The alloy cutter body is detachable and replaceable, and can be replaced individually after wear or damage during processing. This significantly improves the overall tool usage cost. Furthermore, the integration of multiple cutting edges increases the overall size of the alloy cutter body, which is beneficial for the stability of the overall installation and fixation, and also greatly strengthens the overall structural strength of the alloy cutter body.

[0036] Furthermore, the chamfering blade 31 and chamfering blade 33 have the same inclination angle of 45°. The minimum diameter of chamfering blade 31 is φ14mm, and the minimum diameter of chamfering blade 33 is φ38.1mm, with a maximum diameter of φ42mm. In this application, the chamfering blades 31 and 33 both have an inclination angle of 45°. The chamfering blades 31 and 33 are at different heights on the step, resulting in different cutting surface diameters during rotation. Because chamfering blades 31 and 33 are integrated, they have high concentricity and extremely high chamfering accuracy for different hole diameters on the same workpiece. Preferably, the length of the milling cutter blade 32 is 3±0.05mm. The starting position of the milling cutter blade 32 has a chamfer of R0.6 for boring guidance. The length of the milling cutter edge 32 in this application is 3±0.05mm. Such a short milling cutter edge 32 is adjacent to the chamfering edge. This design allows for boring and chamfering of concentric composite holes without changing the tool. The machining of the composite concentric hole can be completed in one step, which is efficient and has good machining accuracy.

[0037] Furthermore, the drill bit 2 has a limiting groove 21 near the alloy cutter body, and a retaining part 34 protrudes from the alloy cutter body. The retaining part 34 is fitted into the limiting groove 21, and the side of the retaining part 34 abuts against the groove wall of the limiting groove 21. The drill bit 2 of this application has a limiting groove 21 near the alloy cutter body, and the alloy cutter body has a retaining part 34 that mates with the limiting groove 21. The tight fit between the retaining part 34 and the limiting groove 21 allows the alloy cutter body to be tightly integrated with the cutter body 1 and the cutter body, effectively reducing vibration or trembling of the alloy cutter body and further improving machining accuracy. Simultaneously, the retaining groove 21 during installation also ensures better overall installation accuracy of the alloy cutter body.

[0038] Example 2

[0039] This is another embodiment of the composite machining part 3 of this application (not shown in the figure). In this embodiment, the other structures are basically the same as those in Embodiment 1, except that the composite machining part 3 is a stepped protrusion integrally formed with the blade 1. The advantage of this design is that the error of the cutting edge at various points of the overall tool is smaller.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. At the same time, the basic principles, main features, and advantages of this utility model have been shown and described above, which should be understood by those skilled in the art.

Claims

1. A composite countersink for lathes, comprising a tool body (1), wherein the front end of the tool body (1) has a drill bit (2), characterized in that, The blade (1) is provided with a composite processing part (3) near the drill bit (2). The composite processing part (3) has multiple blades that are integrally formed and arranged sequentially along the length of the blade (1). The multiple blades are distributed sequentially from the side near the drill bit (2) to the side where the blade (1) is located, from low to high. The composite processing part (3) is an alloy blade body. The blade body (1) has a mounting groove (11). The alloy blade body is fixed in the mounting groove (11). Multiple blades protrude from the mounting groove (11). The blade (1) has a central hole (12) at its center, and the drill bit (2) has a mating part (22) protruding from its end. The drill bit (2) is inserted into the inner side of the central hole (12) through the mating part (22). The drill bit (2) has a limiting groove (21) near the alloy cutter body. A stop part (34) protrudes from the alloy cutter body. The stop part (34) is inserted into the limiting groove (21) and the side of the stop part (34) is in close contact with the groove wall of the limiting groove (21).

2. The lathe composite countersinking drill according to claim 1, characterized in that, The composite machining part (3) has a stepped structure and at least three cutting edges are arranged adjacent to each other on the composite machining part (3). The three cutting edges are chamfering edge one (31), milling cutter edge (32) and chamfering edge two (33) in sequence.

3. A lathe composite countersink according to claim 2, characterized in that, The milling cutter edge (32) and the chamfering edge two (33) are adjacent to each other, and the diameter of the cutting surface formed by the milling cutter edge (32) and the chamfering edge two (33) during rotation is greater than the diameter of the cutting surface formed by the chamfering edge one (31) during rotation.

4. A lathe composite countersink according to claim 2 or 3, characterized in that, The chamfering blade one (31) and chamfering blade two (33) have the same tilt angle, both being 45°.

5. A lathe composite countersink according to claim 2 or 3, characterized in that, The length of the milling cutter edge (32) is 3±0.05mm.

6. A lathe composite countersink according to claim 1, characterized in that, The drill bit (2) has a diameter of φ14mm, a body length of 28.8mm, and an end cutting edge inclination angle of 60°.

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