Assembled deep-hole steel plate drill

Abstract

The utility model relates to the technical field of drilling tool devices, in particular to an assembled deep hole steel plate drill which comprises a tool handle, a tool bar and a tool bit, the tool bar is connected with the tool handle and the tool bit in a threaded fit mode, the tool handle serves as a component connected with drilling machine equipment and is connected to the rear end of the tool bar, and the tool bit serves as an operation component and is connected to the front end of the tool bar. A spiral chip groove is formed in the outer wall of the tool bit. Due to the adoption of an assembled structure, when the steel plate drill fails, only the tool bit needs to be replaced, the whole steel plate drill does not need to be replaced, the cost can be effectively reduced after the steel plate drill is used for a long time, and an efficient and reliable solution is provided for various engineering operations related to extra-long and extra-large steel plate drilling. The specially-designed spiral chip removal grooves greatly enhance the chip removal capacity, it is guaranteed that the drilling process is smooth and free of hindrance, the drilling efficiency is greatly improved, and the machining quality is effectively improved. Due to the comprehensive application of the multi-blade tooth cutting structure and the wear-resistant coating, the steel plate drill can bear larger cutting force, the durability is remarkably improved, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of drilling tool devices, and belongs to an assembled deep hole steel plate drill. Background Technology

[0002] In construction fields such as building, machinery manufacturing, and bridge construction, deep hole drilling of steel plates is a very common operation. However, traditional steel plate drills encounter many problems in practical applications. For example, most traditional steel plate drills are one-piece structures, and once the cutting part wears out, the entire drill bit needs to be replaced, which undoubtedly increases the operating cost significantly. Chips are not easily removed during drilling, leading to accumulation and affecting drilling accuracy and surface quality. Traditional steel plate drills are also weak in withstanding the stress and impact forces during drilling, resulting in poor durability. Frequent drill bit replacements not only delay the project schedule but also increase labor and material costs. Therefore, developing a new type of steel plate drill that can effectively solve these problems and meet the requirements for improving the efficiency and quality of deep hole drilling is of paramount importance. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides an assembled deep hole steel plate drill.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] This application provides an assembled deep hole steel plate drill, including a tool holder, a tool shank, and a tool head. The tool shank is connected to the tool holder and the tool head by a threaded connection. The tool holder is connected to the rear end of the tool shank as a component for connecting drilling equipment. The tool head is connected to the front end of the tool shank as a working component. The outer wall of the tool head is provided with a spiral chip removal groove.

[0006] Preferably, the inner wall of the rear end of the tool holder is provided with an internal thread 1 for connection with the drilling equipment, the inner wall of the front end of the tool holder is provided with an internal thread 2, the outer wall of one end of the tool bar is provided with an external thread 1, the inner wall of the other end of the tool bar is provided with an internal thread 3, and the cutter head is provided with an external thread 2. The internal thread 2 is connected to the external thread 1, and the external thread 2 is connected to the internal thread 3.

[0007] Preferably, both the cutter bar and the cutter head are tubular structures.

[0008] Preferably, the spiral chip removal groove is funnel-shaped, with a smaller front end and a larger rear end, and is opened at two spiral angles of 10°~20° and 20°~30°, with a depth of 3.0~3.5mm and a width of 10~13mm.

[0009] Preferably, the front end of the cutter head is provided with several tooth mounting grooves, and toothed blades are fixedly connected in the tooth mounting grooves.

[0010] Preferably, the cutting teeth adopt a multi-tooth structure, with three cutting teeth arranged in a ring array to form a cutting tooth group. Each cutting tooth group includes an outer cutting tooth, a middle cutting tooth, and an inner cutting tooth. The outer cutting tooth, the middle cutting tooth, and the inner cutting tooth are staggered in a stepped manner along the axial direction of the cutting head, with a stagger height difference of 0.1~0.4mm.

[0011] Preferably, the cutting edge of the blade is designed with an inward and outward inclination angle of 20° to 25°, the overall back angle of the blade is set to 4° to 7°, and a chamfer of 0.02 to 0.05 is provided at the cutting edge, with a chamfer angle of 0° to -5°.

[0012] Preferably, the surface of the cutting teeth is provided with a wear-resistant coating.

[0013] Compared with the prior art, this utility model provides an assembled deep hole steel plate drill, which has the following advantages:

[0014] 1. The modular structure allows for easy replacement of the drill bit when the steel plate drill fails, eliminating the need for complete replacement. This effectively reduces costs over the long term and provides an efficient and reliable solution for various engineering operations involving drilling extra-long and extra-large steel plates.

[0015] 2. The specially designed spiral chip removal groove greatly enhances the chip removal capacity, ensuring a smooth and unobstructed drilling process, significantly improving drilling efficiency and effectively enhancing processing quality.

[0016] 3. The combined application of multi-tooth cutting structure and wear-resistant coating enables the steel plate drill to withstand greater cutting forces, significantly improving durability and extending service life.

[0017] The features and advantages of this utility model will be described in detail through embodiments and in conjunction with the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the knife handle of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the tool holder of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the cutter head of this utility model;

[0022] Figure 5 This is a schematic diagram of the single set of cutting teeth of this utility model in the axial direction;

[0023] In the diagram: 1. Tool holder; 2. Tool shank; 3. Tool head; 11. Internal thread one; 12. Internal thread two; 21. External thread one; 22. Internal thread three; 31. Spiral chip removal groove; 32. Tool tooth mounting groove; 33. Tool tooth; 34. External thread two; 331. External tool tooth; 332. Middle tool tooth; 333. Internal tool tooth. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope. Furthermore, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concepts of this utility model.

[0025] See Figures 1-4 This application provides an assembled deep hole steel plate drill, including a tool holder 1, a tool bar 2 and a tool head 3. The tool bar 2 is connected to the tool holder 1 and the tool head 3 by a threaded connection. The tool holder 1 is connected to the rear end of the tool bar 2 as a component for connecting the drilling machine equipment. The tool head 3 is connected to the front end of the tool bar 2 as a working component. The outer wall of the tool head 3 is provided with a spiral chip removal groove 31.

[0026] Specifically, the inner wall of the rear end of the tool holder 1 is provided with an internal thread 11 for connection with the drilling equipment, the inner wall of the front end of the tool holder 1 is provided with an internal thread 12, the outer wall of one end of the tool bar 2 is provided with an external thread 21, the inner wall of the other end of the tool bar 2 is provided with an internal thread 22, and the end of the tool head 3 is provided with an external thread 34. The internal thread 12 is connected to the external thread 21, and the external thread 34 is connected to the internal thread 22.

[0027] Specifically, both the tool holder 2 and the tool head 3 are tubular structures. The tubular structure can shorten the processing time, reduce the processing cost, and at the same time reduce the overall weight, making it easier to operate.

[0028] Specifically, the spiral chip removal groove 31 is in the shape of a trumpet, with a small front end and a large rear end. It is opened at two spiral angles of 10°~20° and 20°~30°, with a depth of 3.0~3.5mm and a width of 10~13mm.

[0029] During drilling, the increased width and depth of the spiral chip removal groove 31 provide a larger chip removal space. Actual measurements show that under the same processing conditions, the chip volume of a conventional carbide plate drill is 10-15 cubic centimeters per minute, while the special spiral groove allows the chip removal groove to reach 15-20 cubic centimeters per minute, increasing the chip removal speed by approximately 30%-50%. This ensures smooth drilling and effectively avoids the adverse effects of chip accumulation on drilling quality.

[0030] See Figure 4 Specifically, the front end of the cutter head 3 is provided with a plurality of tooth mounting grooves 32, and tooth 33 is fixedly connected in the tooth mounting grooves 32.

[0031] See Figure 5 Specifically, the cutting teeth 33 adopt a multi-tooth structure, with three cutting teeth 33 arranged in a ring array to form a cutting tooth group. Each cutting tooth group includes an outer cutting tooth 331, a middle cutting tooth 332, and an inner cutting tooth 333. The outer cutting tooth 331, the middle cutting tooth 332, and the inner cutting tooth 333 are staggered in a stepped manner along the axis of the cutting head 3, with a staggered height difference of 0.1~0.4mm. This angle and position relationship can effectively disperse the cutting force during the cutting process, reduce the load on a single cutting tooth, and thus greatly improve the cutting efficiency and durability.

[0032] See Figure 5 Specifically, the cutting edge of the cutting tooth 33 is designed with an inward and outward inclination angle of 20° to 25°, the overall back angle of the cutting tooth 33 is set to 4° to 7°, and a chamfer of 0.02 to 0.05 is provided at the cutting edge, with a chamfer angle of 0° to -5°.

[0033] Experimental data confirms that this multi-tooth structure of the steel plate drill has a significant advantage in processing efficiency compared to ordinary steel plate drills. When machining a 250mm deep hole, an ordinary steel plate drill takes 2-3 hours, while the new structure only takes about 45 minutes, increasing processing efficiency by 62.5%~75%.

[0034] Specifically, the surface of the cutting tooth 33 is provided with a wear-resistant coating, which is applied using physical vapor deposition (PVD) or chemical vapor deposition (CVD) technology, with a thickness of 2-3 μm, to improve the wear resistance and corrosion resistance of the cutting tooth.

[0035] Compared with traditional carbide steel plate drills, this invention has the following advantages: The specially designed spiral chip removal groove greatly enhances chip removal capacity, ensuring a smooth and unobstructed drilling process, significantly improving drilling efficiency and effectively enhancing processing quality. The scientific multi-tooth cutting structure and the combined application of wear-resistant coatings allow the steel plate drill to withstand greater cutting forces, significantly improving durability and extending service life. The modular structure means that when the steel plate drill fails, only the cutting head needs to be replaced, eliminating the need for complete replacement. Long-term use can effectively reduce costs, providing an efficient and reliable solution for various engineering operations involving drilling extra-long and extra-large steel plates.

[0036] The above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An assembled long hole steel plate drill, characterized by: It includes a tool holder (1), a tool bar (2) and a tool head (3). The tool bar (2) is connected to the tool holder (1) and the tool head (3) by a threaded connection. The tool holder (1) is connected to the rear end of the tool bar (2) as a component for connecting the drilling machine equipment. The tool head (3) is connected to the front end of the tool bar (2) as a working component. The outer wall of the tool head (3) is provided with a spiral chip removal groove (31).

2. The assembled deep hole steel plate drill as described in claim 1, characterized in that: The inner wall of the rear end of the tool holder (1) is provided with an internal thread 1 (11) for connection with the drilling equipment. The inner wall of the front end of the tool holder (1) is provided with an internal thread 2 (12). The outer wall of one end of the tool bar (2) is provided with an external thread 1 (21). The inner wall of the other end of the tool bar (2) is provided with an internal thread 3 (22). The end of the tool head (3) is provided with an external thread 2 (34). The internal thread 2 (12) is connected to the external thread 1 (21). The external thread 2 (34) is connected to the internal thread 3 (22).

3. The assembled deep hole steel plate drill as described in claim 1, characterized in that: Both the cutter bar (2) and the cutter head (3) are tubular structures.

4. The assembled deep hole steel plate drill as described in claim 1, characterized in that: The spiral chip removal groove (31) is in the shape of a trumpet, with a small front end and a large rear end. It is opened at two spiral angles of 10°~20° and 20°~30°, with a depth of 3.0~3.5mm and a width of 10~13mm.

5. The assembled deep hole steel plate drill as described in claim 1, characterized in that: The front end of the cutter head (3) is provided with several tooth mounting grooves (32), and tooth (33) is fixedly connected in the tooth mounting grooves (32).

6. The assembled deep hole steel plate drill as described in claim 5, characterized in that: The cutting teeth (33) adopt a multi-tooth structure, and three cutting teeth (33) are arranged in a ring array to form a cutting tooth group. A single cutting tooth group includes an outer cutting tooth (331), a middle cutting tooth (332) and an inner cutting tooth (333). The outer cutting tooth (331), the middle cutting tooth (332) and the inner cutting tooth (333) are staggered in a stepped manner along the axial direction of the cutting head (3), and the stagger height difference is 0.1~0.4mm.

7. The assembled deep hole steel plate drill as described in claim 5, characterized in that: The cutting edge of the cutting tooth (33) is designed with an inward and outward inclination angle of 20°~25°, the overall back angle of the cutting tooth (33) is set to 4°~7°, and a chamfer of 0.02~0.05 is set at the cutting edge, with a chamfer angle of 0°~-5°.

8. The assembled deep hole steel plate drill as described in claim 5, characterized in that: The surface of the cutting teeth (33) is provided with a wear-resistant coating.

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