Combined drill tool for hole machining

Abstract

The utility model relates to the technical field of drilling tools, in particular to a composite drilling tool for hole machining, which comprises a tool main body, a tool handle is fixedly connected to the rear end of the tool main body, a forming drill bit is arranged at the front end of the tool main body, and a spiral chip groove is formed in the surface of the tool main body. A first protruding ring and a second protruding ring are sequentially arranged on the side wall close to the rear end of the cutter body from front to back, and a first forming blade and a second forming blade are fixedly connected to the first protruding ring and the second protruding ring respectively. According to the composite drilling tool for hole machining, the front-end forming drill bit, the rear-end first forming blade and the rear-end second forming blade can complete drilling and hole opening forming at a time, tool changing and positioning calibration are reduced, and the period is shortened; only one-time clamping is needed, the clamping error is reduced, and the geometric accuracy is guaranteed; various special cutters are replaced by the compound cutter, so that the purchase and inventory cost is reduced, and the machining process and quality are optimized.

Description

Technical Field

[0001] This utility model relates to the field of drilling tool technology, specifically a composite drilling tool for hole machining. Background Technology

[0002] In the field of machining, hole machining typically requires multiple steps. For example, when forming a cylindrical structure with a specific hole shape (such as a chamfer, countersunk hole, or stepped hole) on a workpiece, the traditional process requires first machining the solid cylindrical part with a drill bit, and then replacing it with a boring bar, milling cutter, or chamfering tool to perform a secondary shaping process on the hole opening. This step-by-step machining method has the following drawbacks: Cumbersome process: Frequent tool changes lead to low machining efficiency, and multiple positioning and calibrations are required, increasing operational complexity; Accuracy risk: Multiple clamping operations can introduce cumulative errors, affecting the coaxiality and dimensional accuracy of the hole opening and the cylindrical structure; Increased cost: Requires various specialized tools, increasing equipment investment and maintenance costs.

[0003] Therefore, there is an urgent need for a composite tool that can integrate drilling and orifice forming functions to solve the above problems. Utility Model Content

[0004] This utility model provides a composite drilling tool for hole machining to solve the problems mentioned in the background art, such as: cumbersome procedures, frequent tool changes leading to low machining efficiency, and the need for multiple positioning and calibration, which increases operational complexity; accuracy risks, as multiple clamping can easily introduce cumulative errors, affecting the coaxiality and dimensional accuracy of the hole and the cylindrical structure; and increased costs, as multiple special tools are required, increasing equipment investment and maintenance costs.

[0005] To address the existing problems, this utility model provides a composite drill bit for hole machining, comprising a tool body, a tool holder fixedly connected to the rear end of the tool body, a shaped drill bit provided at the front end of the tool body, a spiral chip removal groove formed on the surface of the tool body, and a first protruding ring and a second protruding ring arranged sequentially from front to back on the side wall near the rear end of the tool body, with a first shaped cutting edge and a second shaped cutting edge fixedly connected to the first protruding ring and the second protruding ring respectively.

[0006] Furthermore, a limiting groove is formed on the side wall of the tool holder.

[0007] Furthermore, the tool body has two parallel internal cooling channels along the axial direction, and the tool holder has a cooling supply channel along the axial direction, with the internal cooling channels connected to the cooling supply channel.

[0008] Furthermore, the front ends of the first raised ring and the second raised ring are respectively provided with a first chamfer and a second chamfer.

[0009] Furthermore, the sidewalls of the first and second raised rings are connected to the chip removal groove.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. This utility model achieves drilling and hole shaping in a single machining operation by setting a forming drill bit at the front end of the tool body and installing a first forming insert and a second forming insert on the first and second protrusions on the rear sidewall, respectively. This eliminates the need for frequent changes of drill bits, milling cutters, and other specialized tools, reducing tool change time and positioning calibration steps. It optimizes traditional multi-process machining into a one-time operation, significantly improving machining efficiency. Furthermore, after the forming drill bit completes drilling, the subsequent first and second forming inserts can immediately mill the hole opening, avoiding the time wasted due to process interruptions in traditional step-by-step machining and further shortening the overall machining cycle.

[0012] 2. Traditional processes require multiple tool changes and workpiece clamping, which can easily lead to accumulated clamping errors affecting the coaxiality and dimensional accuracy of the hole and cylindrical structure. This invention completes the machining in one operation using a composite tool, requiring only one clamping and positioning. This significantly reduces the risk of clamping errors, ensures the geometric accuracy of the hole and the drilled portion, and improves the workpiece machining quality.

[0013] 3. Traditional processes require a variety of specialized cutting tools such as drill bits, boring tools, and milling cutters. However, this utility model integrates multiple functions through a composite cutting tool, which can replace a variety of single cutting tools, reducing the procurement costs of specialized cutting tools for enterprises and reducing the pressure of tool inventory management. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0015] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0016] In the diagram: 1. Tool body; 101. Internal cooling channel; 2. Tool holder; 201. Limiting groove; 202. Cooling channel; 3. Forming drill bit; 4. Spiral chip removal groove; 5. First raised ring; 501. First chamfer; 6. Second raised ring; 601. Second chamfer; 7. First forming insert; 8. Second forming insert; Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-2 A composite drill bit for hole machining includes a tool body 1, a tool holder 2 fixedly connected to the rear end of the tool body 1, a forming drill bit 3 provided at the front end of the tool body 1, a spiral chip removal groove 4 opened on the surface of the tool body 1, and a first protrusion ring 5 and a second protrusion ring 6 arranged sequentially from front to back on the side wall near the rear end of the tool body 1, and a first forming blade 7 and a second forming blade 8 fixedly connected to the first protrusion ring 5 and the second protrusion ring 6 respectively.

[0019] Among them, a limiting groove 201 is provided on the side wall of the tool holder 2.

[0020] The tool body 1 has two parallel internal cooling channels 101 along the axial direction, and the tool holder 2 has a cooling channel 202 along the axial direction. The internal cooling channels 101 and the cooling channel 202 are connected.

[0021] The first raised ring 5 and the second raised ring 6 are respectively provided with a first chamfer 501 and a second chamfer 601 at their front ends.

[0022] The sidewalls of the first raised ring 5 and the second raised ring 6 are connected to the chip removal groove 4.

[0023] Working principle: During use, the entire tool is installed on the machine tool through the tool holder 2 and the limiting groove 201. Then, as the machine tool runs, the forming drill bit 3 first drills a hole in the part to be processed. At the same time, the chips are discharged from the spiral chip removal groove 4, and the cooling liquid is discharged from the front end of the forming drill bit 3 after passing through the cooling channel 202 and the internal cooling channel 101, cooling the forming drill bit 3 and the tool body 1. Then, the first forming insert 7 and the second forming insert 8 mill the forming hole at the end of the hole in the part.

[0024] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A composite drill tool for hole machining, comprising a tool body (1), a shank (2) fixedly connected to a rear end of the tool body (1), characterized in that: The front end of the tool body (1) is provided with a forming drill bit (3), and the surface of the tool body (1) is provided with a spiral chip removal groove (4). A first protrusion ring (5) and a second protrusion ring (6) are arranged sequentially from front to back on the side wall near the rear end of the tool body (1). A first forming blade (7) and a second forming blade (8) are fixedly connected to the first protrusion ring (5) and the second protrusion ring (6) respectively.

2. A composite drill tool for hole machining according to claim 1, characterized in that: A limiting groove (201) is provided on the side wall of the tool holder (2).

3. A composite drill tool for hole machining according to claim 1, characterized in that: The tool body (1) and the forming drill bit (3) have two parallel internal cooling channels (101) along the axial direction. The tool holder (2) has a cooling channel (202) along the axial direction. The internal cooling channel (101) and the cooling channel (202) are connected.

4. The composite drill tool for hole machining according to claim 1, characterized by: The front ends of the first protruding ring (5) and the second protruding ring (6) are respectively provided with a first chamfer (501) and a second chamfer (601).

5. A composite drilling tool for hole machining according to claim 1, characterized in that: The sidewalls of the first protruding ring (5) and the second protruding ring (6) are connected to the chip removal groove (4).

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