Thread milling cutter for high-hardness material
By designing a thread milling cutter for high-hardness materials with a three-stage cutting structure, the problem of rapid wear and cutting of the tool when the thread milling cutter is processed in the prior art is solved, and a more stable and precise machining process is achieved, and the tool life is extended.
Patent Information
- Application Number
- CN202421503408.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-06-28
AI Technical Summary
When existing thread milling cutters workpieces with hardness above HRC50, they wear quickly and cut severely, resulting in short service life and low machining accuracy.
Design a thread milling cutter for high-hardness materials, adopting a three-stage cutting structure, including rough tooth, finishing teeth and light-tight cutting. Most of the margin is cut by rough tooth, the remaining margin is cut by finishing teeth, and the light-tight cutting teeth are removed, and the burrs and micro-shaking patterns are removed, and the tool life is extended.
Effectively slow down the wear of thread milling cutters, extend the service life, avoid cutting and cutting, improve machining stability and precision, and reduce tool costs.
Smart Images
Figure CN222830870U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mechanical processing tools, in particular to a thread milling cutter for high-hardness materials. Background Art
[0002] A thread milling cutter is a cutting tool used to process threads, usually used on milling machines or CNC milling machines. It has a special tool shape that can cut the shape of the thread on the surface of the workpiece. Thread milling cutters are different from ordinary milling cutters. The shape and size of the thread on the surface of the tool can directly affect the specifications and accuracy of the processed threads. The following are the main features and structures of thread milling cutters: Tool head: The head of the thread milling cutter has thread teeth, and its shape and size are designed according to the thread specifications to be processed. There are usually different types of thread teeth such as V-type and U-type, as well as different pitches and thread specifications. Tool bar: The part that connects the tool head usually has an appropriate length and diameter to ensure the stability and rigidity of the tool. The shape and structure of the tool bar can vary according to different processing requirements. Tool size: The dimensions of the thread milling cutter include tool diameter, tool length, pitch, etc. These dimensions will vary according to the thread specifications and workpiece materials to be processed. Tool material: Thread milling cutters are usually made of materials such as high-speed steel (HSS) or cemented carbide to ensure that the tool has sufficient hardness and wear resistance to maintain good cutting performance during processing. Tool coating: Some thread milling cutters are coated, such as titanium alloy coating, titanium carbide coating, etc., to improve the surface hardness and wear resistance of the tool and extend the service life of the tool. Thread milling cutters are widely used in the fields of automobile manufacturing, mechanical processing, aerospace, etc., for processing various types and specifications of threaded parts, such as bolts, nuts, propellers, etc. They can efficiently and accurately process high-quality threads and are one of the important cutting tools that are indispensable in modern manufacturing.
[0003] In the prior art, thread processing is very common in the processing of mechanical products, and the most commonly used processing method is tap processing. If the hardness of the workpiece exceeds HRC50, tap processing is very difficult, and a thread milling cutter is required for smooth processing. Ordinary thread milling cutters wear out quickly when processing workpieces above HRC50, and the phenomenon of cutting yield is common. When the thread milling cutter of the prior art cuts high hardness workpieces with full tooth profiles, the cutting force is very large, and the cutting vibration causes the tool to be quickly damaged. Equal-height three-tooth milling cutters can process high-hardness workpieces, but they wear quickly and the cutting yield is obvious. Single-tooth milling cutters wear out quickly when processing high-hardness workpieces, and the size is difficult to stabilize. Utility Model Content
[0004] The purpose of the utility model is to provide a thread milling cutter for high-hardness materials, which can slow down the wear of the thread milling cutter when processing workpieces with a hardness of more than HRC50, so as to extend the service life of the thread milling cutter, effectively avoid the occurrence of cutting tool let-down phenomenon, and can be more stable during processing operations, so as to make the size of the processed workpiece more precise.
[0005] To achieve the above-mentioned purpose, a thread milling cutter for high-hardness materials is provided, including a tool rod, a tool head is fixedly connected to the left side of the tool rod, rough processing teeth are arranged on the left side of the tool head, finishing teeth are arranged in the middle of the tool head, and finishing teeth are arranged on the right side of the tool head.
[0006] According to the thread milling cutter for high-hardness materials, the manufacturing materials of the tool rod and the tool head are cemented carbide materials.
[0007] According to the thread milling cutter for high-hardness materials, the rough-processing teeth are relatively short, have a relatively large tooth width, and have relatively strong rigidity.
[0008] According to the thread milling cutter for high-hardness materials, the tooth portion of the finishing teeth has the same size as the thread to be opened, the tooth portion is longer and the tooth width is shorter.
[0009] According to the thread milling cutter for high-hardness materials, the shape of the finishing teeth is the same as the shape of the finishing teeth, but is more precise than the finishing teeth.
[0010] The utility model has the following beneficial effects:
[0011] 1. Compared with the prior art, the thread milling cutter for high-hardness materials adopts three-stage cutting for the workpiece, wherein the rough machining teeth process most of the allowance, the finishing teeth process the remaining allowance, and the finishing teeth perform secondary machining on the part after finishing teeth processing to remove burrs, micro-vibration marks, etc., so that the thread processing is more stable, and the wear on the finishing teeth and the finishing teeth during processing is effectively reduced, thereby increasing the service life of the thread milling cutter, that is, reducing the tool cost.
[0012] 2. Compared with the prior art, this thread milling cutter for high-hardness materials is provided with rough processing teeth. Due to its relatively short structure, it has stronger rigidity and wear resistance. It is more stable when cutting most of the excess of the workpiece. Due to its strong rigidity, it can effectively avoid the situation of the cutter slipping during operation.
[0013] 3. Compared with the prior art, this kind of high-hardness material uses a thread milling cutter and three-stage progressive processing, which makes the processing process more stable. When the finishing tooth is damaged, the finishing tooth can replace the finishing tooth to cut the remaining margin, ensuring the stability of the workpiece quality and preventing irreversible cutting of the workpiece due to incomplete cutting, making it unusable and causing waste.
[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 a front view of a thread milling cutter for high hardness materials according to the utility model;
[0017] Figure 2 The utility model is a thread milling cutter for high hardness materials Figure 1 A magnified image;
[0018] Figure 3 The utility model is a schematic diagram of tapping a thread milling cutter for high hardness materials.
[0019] Legend:
[0020] 1. Cutter bar; 2. Cutter head; 3. Rough machining teeth; 4. Finishing teeth; 5. Polishing teeth. DETAILED DESCRIPTION
[0021] 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.
[0022] Reference Figure 1-3 The utility model embodiment is a thread milling cutter for high hardness materials, which includes a tool rod 1, a cutter head 2 is fixedly connected to the left side of the tool rod 1, a rough processing tooth 3 is arranged on the left side of the cutter head 2, the rough processing tooth 3 has a relatively short tooth part, a larger tooth width, and a stronger rigidity, a fine processing tooth 4 is arranged in the middle of the cutter head 2, the fine processing tooth 4 has the same tooth part as the size of the opened thread, the tooth part is longer, and the tooth width is shorter, a finishing tooth 5 is arranged on the right side of the cutter head 2, the shape of the finishing tooth 5 is the same as that of the fine processing tooth 4, but it is more precise than the fine processing tooth 4, and the manufacturing material of the tool rod 1 and the cutter head 2 is cemented carbide material.
[0023] The above structure is provided with a rough machining tooth 3, so that 65% of the total excess can be cut during machining, and the rough machining tooth 3 is designed to be relatively short and small, and the tooth width is large, so the rigidity of this tooth is better. Therefore, when the excess is removed by rough machining, the wear resistance is good and the shape retention is greatly improved compared with the products of the prior art.
[0024] By providing the finishing teeth 4, the remaining 35% of the allowance can be cut according to the thread size, and the finishing teeth 4 have a small cutting allowance, so it is not easy to wear, and the final processing size can be guaranteed for a long time. The consistency of the processed thread size is better than that of products in the prior art.
[0025] By providing the finishing teeth 5, processing burrs, micro-vibration marks, etc. can be removed to improve the processing surface quality; at the same time, it protects the second row of teeth. Even if the second row of teeth is unexpectedly damaged, the third row of teeth can still ensure the thread size.
[0026] By providing the rough machining tooth 3, due to its relatively short structure, it has stronger rigidity and stronger wear resistance, and is more stable when cutting most of the excess of the workpiece. Due to its strong rigidity, it can effectively avoid the situation of tool slipping during operation. By adopting three-stage cutting of the workpiece, the rough machining tooth 3 processes most of the excess, the fine machining tooth 4 processes the remaining excess, and the finishing tooth 5 performs secondary processing on the part processed by the fine machining tooth 4 to remove burrs, micro-vibration marks, etc., making the thread processing more stable, and effectively reducing the wear of the fine machining tooth 4 and the finishing tooth 5 during processing, thereby increasing the service life of the thread milling cutter, that is, reducing the tool cost, and the three-stage progressive processing makes the processing more stable. When the fine machining tooth 4 is broken, the finishing tooth 5 can replace the fine machining tooth 4 to cut the remaining excess, thereby ensuring the stability of the workpiece quality and preventing irreversible cutting of the workpiece due to incomplete cutting, which makes it impossible to put it into use and cause waste.
[0027] Working principle: The thread milling cutter for high hardness materials is installed in the middle of the processing, and the processing parameters are adjusted. The metal to be processed is fixed on the workbench, and the processing center is started to let the thread milling cutter perform cutting processing according to the preset program. The rough processing tooth 3 is designed to be relatively short and small, and the tooth width is large, so the tooth rigidity is better. Therefore, when the rough processing removes the excess, the wear resistance is good, and the shape retention is greatly improved compared with the existing technology products. The fine processing tooth 4 has a small cutting allowance, so it is not easy to wear, and the final processing size is guaranteed for a long time. The consistency of the processed thread size is better than that of the existing technology. The product of this technology is good. It can polish tooth 5, remove processing burrs, micro-vibration marks, etc., improve the processing surface quality, and protect the second row of teeth at the same time. Even if the second row of teeth is unexpectedly damaged, the third row of teeth can still ensure the thread size. This tool adopts a left-hand design. When in use, the tool is guaranteed to be forward milling to avoid tool failure and cutting vibration caused by reverse milling. The three cooperate with each other to perform three-stage cutting. Since the rigidity of the rough-machined tooth 3 is relatively large, it is more wear-resistant during the processing, and it cuts most of the allowance, reducing the wear of the fine-machined tooth 4 in the subsequent work, making the fine-machined tooth 4 more durable.
[0028] 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 thread milling cutter for high hardness materials, characterized in that: The invention comprises a tool rod (1), wherein a tool head (2) is fixedly connected to the left side of the tool rod (1), a rough machining tooth (3) is arranged on the left side of the tool head (2), a fine machining tooth (4) is arranged in the middle of the tool head (2), and a finishing tooth (5) is arranged on the right side of the tool head (2).
2. A thread milling cutter for high hardness materials according to claim 1, characterized in that: The tool rod (1) and the tool head (2) are made of hard alloy material.
3. A thread milling cutter for high hardness materials according to claim 1, characterized in that: The rough-machined teeth (3) are relatively short at the teeth, have a relatively large tooth width and are relatively rigid.
4. A thread milling cutter for high hardness materials according to claim 1, characterized in that: The tooth portion of the finishing tooth (4) has the same size as the threaded portion, is longer, and has a shorter tooth width.
5. The thread milling cutter for high hardness material according to claim 1, characterized in that: The shape of the finishing teeth (5) is the same as that of the finishing teeth (4), but is more precise than the finishing teeth (4).