Modularized drilling tool with variable length

Abstract

The utility model discloses a modularized drilling cutter with variable length, which comprises a steel drilling cutter bar, a modularized extension bar and a second modularized replaceable connector, the right side of the steel drilling cutter bar is provided with a first modularized replaceable connector, the right side of the first modularized replaceable connector is provided with a first drilling blade, and the right side of the second modularized replaceable connector is provided with a second drilling blade. A center drilling blade is arranged in the second modular replaceable connector, and an outer side drilling blade is arranged on the side face of the center drilling blade. By means of the structure, the problem that the cutting structure of a drilling tool cannot be changed can be solved, the problem that due to the fact that the cutting structure of the tool cannot be changed, other matched tools need to be purchased, and the production cost is greatly improved is solved, and the situation that when the head of the drilling tool is abraded, a drill bit is directly scrapped can be solved; the situation that the whole drilling tool is directly scrapped due to the fact that the drill bit is scrapped is avoided, and the problem that the production cost is greatly increased is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling tools, in particular to a modular drilling tool with variable length. Background Art

[0002] In the processing of mechanical products, drilling is a very common and important process. U drills, crown drills, spade drills and other high-efficiency tools are often used to drill large diameter holes. These drill bits are produced according to a certain aspect ratio, and commonly used are 3D / 5D / 8D / 10D fixed lengths. These drilling tools have four disadvantages: first, the diameter is fixed and cannot be changed; second, the cutting structure is fixed and cannot be changed; third, once the head is worn, the entire drill bit will be scrapped; fourth, when a drill bit of a certain fixed length does not meet production needs, it is necessary to purchase a longer tool to meet production needs, which greatly increases production costs.

[0003] The existing U drills (down-the-hole drills), crown drills, spade drills and other large-diameter drills are all manufactured according to a fixed length with a certain aspect ratio. This technology has four disadvantages: 1. The diameter is fixed and cannot be changed. 2. The cutting structure is fixed and cannot be changed. 3. Once the head is worn, the entire drill will be scrapped. 4. When a drill of a certain fixed length does not meet production needs, it is necessary to purchase a longer tool to meet production needs, which increases a lot of production costs. Utility Model Content

[0004] The purpose of the utility model is to provide a modular drilling tool with variable length, which can solve the problem that the cutting structure of the drilling tool cannot be changed, avoids the need to purchase other suitable tools due to the unchangeable cutting structure of the tool, and thus greatly increases the production cost. It can solve the situation that when the drilling tool head is worn, the drill bit is directly scrapped, avoids the situation that the drill bit is directly scrapped and the entire drilling tool is directly scrapped, and avoids the problem of a substantial increase in production cost. It can solve the situation that a fixed-length drill bit can only meet the production of a single process, avoids the problem that the drill bit does not meet the production needs, resulting in the need to purchase longer tools to meet the production needs, thereby avoiding the problem of a substantial increase in cost.

[0005] To achieve the above object, a modular drilling tool with variable length is provided, comprising a steel drilling tool bar, a modular extension rod and a second modular replaceable connector, wherein the first modular replaceable connector is arranged on the right side of the steel drilling tool bar;

[0006] A first drilling blade is arranged on the right side of the first modular replaceable connecting head, a center drilling blade is arranged inside the second modular replaceable connecting head, and an outer drilling blade is arranged on the side of the center drilling blade.

[0007] According to the variable-length modular drilling tool, the steel drilling tool bar is made of hot-working die steel, and the hardness of the steel drilling tool bar is HRC.

[0008] According to the modular drilling tool with variable length, a fixing locking screw is arranged above the first modular replaceable connecting head.

[0009] According to the variable-length modular drilling tool, a first joint is fixedly connected to the left side of the modular extension rod.

[0010] According to the modular drilling tool with variable length, a second joint is fixedly connected to the left side of the second modular replaceable connecting head.

[0011] The utility model has the following beneficial effects:

[0012] 1. Compared with the prior art, the variable-length modular drilling tool, by setting a fixed locking screw and a first modular replaceable connecting head, can achieve that when the first modular replaceable connecting head is damaged, the first modular replaceable connecting head can be separated from the fixed locking screw by twisting the fixed locking screw, thereby solving the problem that the cutting structure of the drilling tool cannot be changed, avoiding the need to purchase other suitable tools due to the unchangeable cutting structure of the tool, and significantly increasing the production cost. It also solves the problem that the drill bit is directly scrapped when the drilling tool head is worn, avoids the situation that the entire drilling tool is directly scrapped due to the scrapping of the drill bit, and avoids the problem of a substantial increase in production costs.

[0013] 2. Compared with the prior art, this modular drilling tool with variable length, by setting a modular extension rod, can achieve the adaptation of the length of the drilling tool by disassembling and assembling the modular extension rod when the length of the drilling tool does not match the length required for production, thereby solving the problem that a fixed-length drill bit can only meet the production of a single process, avoiding the problem that the drill bit does not meet the production requirements and the need to purchase longer tools to meet the production needs, thereby avoiding the problem of a substantial increase in costs.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0016] Figure 1 This is an overall structural diagram of a modular drilling tool with variable length according to the utility model;

[0017] Figure 2 It is a three-dimensional structural diagram of a modular extension rod of a modular drilling tool with variable length according to the utility model;

[0018] Figure 3 A second modular replaceable connector of a modular drilling tool with a variable length and a structural diagram thereof;

[0019] Figure 4 The utility model is a modular drilling tool with variable length Figure 1 Enlarged view of point A in the middle.

[0020] Legend:

[0021] 1. Steel drilling arbor; 2. Fixing locking screw; 3. First modular replaceable connector; 4. First drilling blade; 5. Modular extension rod; 6. Second modular replaceable connector; 7. Center drilling blade; 8. Outer drilling blade; 9. First joint; 10. Second joint. DETAILED DESCRIPTION

[0022] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0023] Reference Figure 1-4 The utility model embodiment is a modular drilling tool with variable length, which includes a steel drilling tool rod 1, a modular extension rod 5 and a second modular replaceable connecting head 6. A first modular replaceable connecting head 3 is arranged on the right side of the steel drilling tool rod 1, and a fixed locking screw 2 is arranged above the first modular replaceable connecting head 3. The material of the steel drilling tool rod 1 is hot working die steel, and the hardness of the steel drilling tool rod 1 is HRC50.

[0024] A first drilling blade 4 is arranged on the right side of the first modular replaceable connecting head 3, a center drilling blade 7 is arranged inside the second modular replaceable connecting head 6, an outer drilling blade 8 is arranged on the side of the center drilling blade 7, a first joint 9 is fixedly connected to the left side of the modular extension rod 5, and a second joint 10 is fixedly connected to the left side of the second modular replaceable connecting head 6.

[0025] The above structure, by setting the steel drilling arbor 1, realizes that the steel drilling arbor 1 can adapt to drilling holes with a larger aspect ratio, and the steel drilling arbor 1 adopts hot working die steel, vacuum quenched HRC50, HRC50 refers to the hardness value, and the hot working die steel after vacuum quenching reaches a hardness of 50HRC. HRC is a common metal hardness test method, by which the hardness of the material can be measured. HRC50 indicates that this hot working die steel has a high hardness, which means that it has good wear resistance and deformation resistance, and is suitable for manufacturing hot working dies that require high hardness and wear resistance. Through the vacuum quenching process, the hot working die steel can obtain a uniform organizational structure and hardness, which effectively improves the performance and stability of the material. Such high-hardness hot-working die steel is usually used to manufacture cutting tools that require high wear resistance and deformation resistance. These cutting tools usually need to work in high temperature and high pressure environments. Therefore, the hardness and wear resistance of the material are very critical. By setting the fixed locking screw 2 and the first modular replaceable connector 3, when the first modular replaceable connector 3 is damaged, the first modular replaceable connector 3 can be separated from the fixed locking screw 2 by twisting the fixed locking screw 2, thereby realizing the replacement of the first modular replaceable connector 3, thereby solving the problem that the cutting structure of the drilling tool cannot be changed, and avoiding the need to purchase other suitable tools due to the unchangeable cutting structure of the tool. The problem of significantly increasing production costs is solved, and the situation that the drill bit is directly scrapped when the drilling tool head is worn is solved, and the situation that the drill bit is scrapped and the entire drilling tool is directly scrapped is avoided, and the problem of significantly increasing production costs is avoided. By setting the modular extension rod 5, when the length of the drilling tool is not compatible with the length required for production, the modular extension rod 5 can be disassembled and assembled to achieve the length adaptation of the drilling tool, thereby solving the situation that the fixed-length drill bit can only meet the production of a single process, avoiding the problem that the drill bit does not meet the production needs, resulting in the need to purchase longer tools to meet the production needs, thereby avoiding the problem of significantly increasing costs.

[0026] Working principle: When the first modular replaceable connecting head 3 is damaged, the first modular replaceable connecting head 3 can be separated from the fixed locking screw 2 by twisting the fixed locking screw 2, thereby realizing the replacement of the first modular replaceable connecting head 3, thereby solving the problem that the cutting structure of the drilling tool cannot be changed, avoiding the need to purchase other suitable tools due to the unchangeable cutting structure of the tool, and significantly increasing the production cost, and solving the problem that when the head of the drilling tool is worn, the drill bit is directly scrapped, avoiding the situation that the drill bit is directly scrapped and the entire drilling tool is directly scrapped, and avoiding the problem of a substantial increase in production costs. When the length of the drilling tool is not compatible with the length required for production, the modular extension rod 5 can be disassembled and assembled to achieve the length adaptation of the drilling tool, thereby solving the problem that a fixed-length drill bit can only meet the production of a single process, avoiding the problem that the drill bit does not meet production needs, resulting in the need to purchase longer tools to meet production needs, thereby avoiding the problem of a substantial increase in costs.

[0027] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A modular drilling tool with variable length, characterized in that: It comprises a steel drilling arbor (1), a modular extension rod (5) and a second modular replaceable connector (6), wherein the first modular replaceable connector (3) is arranged on the right side of the steel drilling arbor (1); A first drilling blade (4) is arranged on the right side of the first modular replaceable connecting head (3), a center drilling blade (7) is arranged inside the second modular replaceable connecting head (6), and an outer drilling blade (8) is arranged on the side of the center drilling blade (7).

2. A variable length modular drilling tool according to claim 1, characterized in that: The steel drilling arbor (1) is made of hot working die steel, and the hardness of the steel drilling arbor (1) is HRC50.

3. A variable length modular drilling tool according to claim 1, characterized in that: A fixing locking screw (2) is arranged above the first modular replaceable connector (3).

4. A variable length modular drilling tool according to claim 1, characterized in that: The left side of the modular extension rod (5) is fixedly connected with a first joint (9).

5. A variable length modular drilling tool according to claim 1, characterized in that: A second connector (10) is fixedly connected to the left side of the second modular replaceable connector (6).

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