A progressive cutting hole-making tool

Abstract

This utility model discloses a progressive cutting hole-making tool, belonging to the field of tool technology. It features a detachable cutting head installed in a mounting slot, which is detachably fixed in the slot by positioning bolts. When the cutting head needs replacement due to cutting wear, only the positioning bolts need to be removed to replace the cutting head individually, without replacing the entire tool body. This significantly reduces maintenance costs and extends the overall service life of the tool. The progressive cutting hole-making tool includes a tool body and a fixing cylinder for mounting the tool body. A spiral-shaped slag guide groove is formed on the outer edge of the tool body, and a mounting slot is formed on the top of the tool body. An auxiliary hole-making cutting cutting head is detachably installed in the mounting slot and fixed in the mounting slot by positioning bolts. An insertion groove is formed on the top of the fixing cylinder, and a pressing cylinder is installed in the insertion groove. A pressing sleeve is threaded onto the outer edge of the fixing cylinder. A top pressure seat is integrally formed near the bottom of the tool body.

Description

Technical Field

[0001] This utility model belongs to the field of cutting tool technology, specifically relating to a progressive cutting hole-making tool. Background Technology

[0002] Hole-making tools are a general term for a class of cutting tools used in machining to create or machine holes in workpieces. They constitute a very important and large category of metal cutting tools. Simply put, any tool used to drill, enlarge, finish hole walls, or machine a specially shaped hole in solid material can be called a hole-making tool.

[0003] Publication number "CN207547710U" discloses a hole-making tool, including a drill bit with a double apex angle design and a shank for fixing the drill bit. The drill bit has a first cutting edge and a second chipping edge. The first apex angle α formed by the first cutting edge is 130° to 150°, and the second apex angle β formed by the second chipping edge is 180°.

[0004] The aforementioned hole-making tools adopt a structure in which the cutting head and the tool body are integrally formed. When the cutting head needs to be replaced due to cutting wear, the entire tool body must be scrapped or returned to the factory for repair, resulting in high maintenance costs and serious waste of resources. In metal processing, after the carbide cutting head is worn, the entire tool needs to be replaced, and the cost of a single replacement can reach hundreds of yuan. At the same time, frequent replacements affect the production cycle. Therefore, a progressive cutting hole-making tool is needed to help solve this problem. Utility Model Content

[0005] (1) Technical problems to be solved To address the shortcomings of existing technologies, the purpose of this utility model is to provide a progressive cutting hole-making tool. This progressive cutting hole-making tool has a cutting head that is detachably installed in a mounting slot. The cutting head is detachably fixed in the mounting slot by a positioning bolt. When the cutting head needs to be replaced due to cutting wear, only the positioning bolt needs to be removed to replace the cutting head separately, without replacing the entire tool body. This significantly reduces maintenance costs and extends the overall service life of the tool.

[0006] (2) Technical solution To solve the above-mentioned technical problems, this utility model provides a progressive cutting hole-making tool, which includes a tool body and a fixing cylinder for mounting the tool body. A spiral slag guide groove is formed at the outer edge of the tool body, and a mounting groove is formed at the top of the tool body. A cutting head for auxiliary hole-making cutting is detachably mounted in the mounting groove, and the cutting head is fixed in the mounting groove by positioning bolts. The top of the fixed cylinder is provided with an insertion groove, and an extrusion cylinder is installed in the insertion groove. An extrusion sleeve is threaded on the outer edge of the fixed cylinder. A top pressure seat is integrally formed near the bottom of the cutter body. During installation, the top pressure seat is located at the bottom of the extrusion sleeve.

[0007] Furthermore, four slag guide grooves are provided, and the four slag guide grooves are arranged in a circular array with the axis of the tool body as the center.

[0008] Furthermore, the extrusion cylinder is generally double-conical in shape, and extrusion grooves are staggered on the outer edge of the extrusion cylinder. The extrusion cylinder and the insertion groove cooperate to extrude and assist in pressing the tool body.

[0009] Furthermore, the top pressure seat is in the shape of a frustum cylinder and is located at the top of the extrusion cylinder.

[0010] Furthermore, a mounting base is installed below the fixed cylinder, a protruding seat is provided at the top of the mounting base, and a snap-fit ​​groove is provided at the bottom of the fixed cylinder for mounting the protruding seat.

[0011] Furthermore, a limiting groove is provided on the protruding seat, and a limiting block for fixing the limiting groove is installed in the snap-fit ​​groove, and the limiting block and the limiting groove slide together.

[0012] Furthermore, a fixing bolt is threaded onto the fixing cylinder, and a fixing hole is drilled in the limiting groove, with the fixing bolt and the fixing hole fitting together for fixation.

[0013] (3) Beneficial effects Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model features a cutting head that is detachably installed in a mounting slot. The cutting head is detachably fixed in the mounting slot by a positioning bolt. When the cutting head needs to be replaced due to cutting wear, only the positioning bolt needs to be removed to replace the cutting head separately, without replacing the entire tool body. This greatly reduces maintenance costs and extends the overall service life of the tool. This invention forms a multi-directional continuous chip removal channel through four spiral chip guide grooves arranged in a ring array, enabling cutting chips to be discharged quickly and evenly upwards along the chip guide grooves. This effectively avoids the problems of increased cutting resistance and accelerated tool wear caused by poor chip removal in traditional tools, and significantly improves cutting smoothness and tool durability. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural diagram of the new utility model in its disassembled state; Figure 3 This is a schematic diagram of the structure of the cutting tool body of this utility model; Figure 4 This utility model Figure 1 A magnified structural diagram of point A in the middle.

[0016] The markings in the attached diagram are as follows: 1. Mounting base; 2. Protruding seat; 3. Fixing cylinder; 4. Fixing bolt; 5. Extrusion cylinder; 51. Extrusion groove; 6. Tool body; 7. Top pressure seat; 8. Slag guide groove; 9. Mounting groove; 10. Cutting head; 11. Positioning bolt; 12. Extrusion sleeve. 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] This specific embodiment is a progressive cutting hole-making tool, such as... Figure 1-4 As shown, the progressive cutting hole-making tool includes a tool body 6 and a fixing cylinder 3 for mounting the tool body 6. A spiral slag guide groove 8 is provided on the outer edge of the tool body 6. There are four slag guide grooves 8 arranged in a circular array with the axis of the tool body 6 as the center.

[0019] The spiral guide grooves 8 arranged in four ring arrays form a multi-directional continuous chip removal channel, which enables cutting chips to be discharged quickly and evenly upward along the guide grooves 8. This effectively avoids the problems of increased cutting resistance and accelerated tool wear caused by poor chip removal in traditional tools, and significantly improves cutting smoothness and tool durability.

[0020] The tool body 6 has a mounting groove 9 at the top, in which a cutting head 10 for auxiliary hole making is detachably installed. The cutting head 10 is fixed in the mounting groove 9 by a positioning bolt 11. The fixed cylinder 3 has an insertion groove at the top, in which an extrusion cylinder 5 is installed. An extrusion sleeve 12 is threaded onto the outer edge of the fixed cylinder 3. A top pressure seat 7 is integrally formed near the bottom of the tool body 6. The top pressure seat 7 is shaped like a frustum cylinder and is located at the top of the extrusion cylinder 5. During installation, the top pressure seat 7 is located at the bottom of the extrusion sleeve 12.

[0021] The cutting head 10 is detachably installed in the mounting slot 9. The cutting head 10 is detachably fixed in the mounting slot 9 by the positioning bolt 11. When the cutting head needs to be replaced due to cutting wear, only the positioning bolt 11 needs to be removed to replace the cutting head separately, without replacing the entire tool body 6. This greatly reduces maintenance costs and extends the overall service life of the tool. The fixing method of the positioning bolt 11 not only ensures the stability of the cutting head 10 in the mounting slot 9 during the cutting process and avoids the cutting head loosening or displacement caused by cutting vibration, but also realizes quick disassembly and assembly through bolt connection. The operation is simple and efficient.

[0022] The extrusion cylinder 5 is generally double-conical in shape. Extrusion grooves 51 are staggered on the outer edge of the extrusion cylinder 5. The extrusion cylinder 5 and the insertion groove cooperate to extrude and assist in pressing the tool body 6. Through the design of the extrusion grooves 51 staggered on the outer edge of the double-conical extrusion cylinder 5, a more uniform radial pressing force can be generated under the axial pressing force of the extrusion sleeve 12. It forms multi-point contact extrusion with the inner wall of the insertion groove, which greatly enhances the fixing stability of the tool body 6 in the fixed cylinder 3, effectively prevents tool loosening or displacement caused by cutting vibration, and ensures the accuracy and quality of hole making.

[0023] A mounting base 1 is installed below the fixed cylinder 3. A protruding seat 2 is provided at the top of the mounting base 1. A snap-fit ​​groove for installing the protruding seat 2 is provided at the bottom of the fixed cylinder 3. A limit groove is provided on the protruding seat 2. A limit block for fixing the limit groove is installed in the snap-fit ​​groove. The limit block and the limit groove slide together. A fixing bolt 4 is threaded on the fixed cylinder 3. A fixing hole is drilled in the limit groove. The fixing bolt 4 is fixed together with the fixing hole.

[0024] By using the fixed cylinder 3 and the mounting base 1 to engage with the protruding seat 2 and the snap-fit ​​groove, and the sliding positioning of the limiting groove and the limiting block, fast and accurate installation and docking can be achieved. With the fixed bolt 4 and the threaded fixing of the fixed hole, the impact of installation error on the hole making accuracy is effectively reduced, and the processing efficiency and quality stability are improved.

[0025] Working principle: In use, the protruding seat 2 on the top of the mounting base 1 is first inserted into the snap-fit ​​groove at the bottom of the fixing cylinder 3 for installation. The limiting groove on the protruding seat 2 and the limiting block in the snap-fit ​​groove cooperate to slide, achieving precise positioning during the installation process. Then, the fixing bolt 4 is threaded onto the fixing cylinder 3, so that it cooperates with the fixing hole in the limiting groove to ensure a stable connection between the fixing cylinder 3 and the mounting base 1.

[0026] The tool body 6 is inserted into the insertion groove at the top of the fixed cylinder 3. The integrally formed frustum-shaped top pressure seat 7 near the bottom is located at the top of the extrusion cylinder 5. The extrusion cylinder 5 is generally double-conical and has extrusion grooves 51 staggered on its outer edge, which form a tight fit with the inner wall of the insertion groove. By rotating the extrusion sleeve 12 threaded on the outer edge of the fixed cylinder 3, it moves downward and exerts a squeezing effect on the top pressure seat 7. This force is transmitted to the tool body 6 through the top pressure seat 7. At the same time, the extrusion cylinder 5 is squeezed by the insertion groove to generate a radial clamping force. The two work together to firmly fix the tool body 6.

[0027] During cutting operations, the machining equipment drives the tool to rotate and feed downwards. The cutting head 10 at the top of the tool body 6 is fixed in the mounting groove 9 by the positioning bolt 11. It first contacts the material to be processed for progressive cutting. The waste chips generated by cutting are discharged upwards along the spiral guide grooves 8 arranged in four annular arrays on the outer edge of the tool body 6 to avoid the accumulation of waste chips affecting the cutting efficiency and ensure that the cutting process continues smoothly. After working for a period of time, if the cutting head 10 is damaged, the individual cutting head 10 can be quickly replaced.

[0028] All technical features in this embodiment can be freely combined according to actual needs.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A progressive cutting hole cutter comprising a cutter body (6) and a fixing cylinder (3) for mounting the cutter body (6), characterized in that, The outer edge of the tool body (6) is provided with a spiral slag guide groove (8), and the top of the tool body (6) is provided with an installation groove (9). A cutting head (10) for auxiliary hole making is detachably installed in the installation groove (9). The cutting head (10) is fixed in the installation groove (9) by a positioning bolt (11). The top of the fixed cylinder (3) is provided with a insertion groove, and the insertion groove is provided with an extrusion cylinder (5). The outer edge of the fixed cylinder (3) is threaded with an extrusion sleeve (12). The tool body (6) is integrally formed with a top pressure seat (7) near the bottom. When installed, the top pressure seat (7) is located at the bottom of the extrusion sleeve (12).

2. A progressive cutting hole cutter according to claim 1, wherein, Four slag guide grooves (8) are provided, and the four slag guide grooves (8) are arranged in a circular array with the axis of the cutter body (6) as the center.

3. A progressive cutting hole cutter according to claim 1, wherein, The extrusion cylinder (5) is generally double conical in shape. Extrusion grooves (51) are staggered on the outer edge of the extrusion cylinder (5). The extrusion cylinder (5) and the insertion groove cooperate to extrude and assist in pressing the tool body (6).

4. A progressive cutting hole cutter according to claim 3, wherein, The top pressure seat (7) is in the shape of a frustum cylinder and is located at the top of the extrusion cylinder (5).

5. A progressive cutting hole cutter according to claim 1 wherein, A mounting base (1) is installed below the fixed cylinder (3), and a protruding seat (2) is provided at the top of the mounting base (1). A snap-fit ​​groove for installing the protruding seat (2) is provided at the bottom of the fixed cylinder (3).

6. A progressive cutting hole cutter according to claim 5, wherein, A limiting groove is provided on the protruding seat (2), and a limiting block is installed in the snap-fit ​​groove for fixing the limiting groove. The limiting block and the limiting groove slide together.

7. A progressive cutting hole cutter according to claim 6, wherein, A fixing bolt (4) is threadedly installed at the fixing cylinder (3), and a fixing hole is drilled in the limiting groove. The fixing bolt (4) and the fixing hole are fixed together.

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