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Problems and Measures in Mechanical Processing of Titanium Alloy Fasteners

Problems and Measures in Mechanical Processing of Titanium Alloy Fasteners

Nov 17,2021
Titanium alloy fasteners are widely used in mechanical production and processing, with high precision and strength of components, and superior comprehensive performance in all aspects. They can be used in various fields of mechanical processing. It is a good material for processing and production. When titanium alloy fasteners are used, there are also certain defects, which directly affect the quality of the processing during the use of the product, causing certain problems in the processing. This article discusses and analyzes the problems and improvement measures of titanium alloy fasteners in mechanical processing.
Keywords:titanium alloy fastener; machining; measures; problems
In the machining and production process, titanium alloy fasteners are used in a wide range. In the process of use, it can reduce the weight of the machine itself. This is a lightweight material, especially in the aerospace field. In recent years of scientific and technological development, the use of titanium alloy fasteners has continued to expand. The ability to closely connect titanium alloys with other materials is of great significance in mechanical processing and production.
Titanium alloy fasteners have problems in mechanical processing

1.1 Mechanical processing machine operation and production problems
In the production and processing process of titanium alloy fasteners, the processing requirements of the workshop are higher. In the processing of lathes, the density of titanium alloy fasteners is relatively higher than that of other materials, and the technical requirements and processing difficulties for processing will be higher. The technical requirements in these processing processes pose certain processing problems for the production plant. During the processing, the wear of the cutter will be a little more serious. It is necessary to find a higher quality alloy tool to be able to perform the processing and production process. In order to reduce costs, this is a significant problem in the mechanical processing and production of titanium alloy fasteners, and reasonable program adjustments, processing procedures, and processing conditions need to be adjusted.

1.2 The corrosion problem of titanium alloy fastener processing and preservation
In the machining and production process of titanium alloy fasteners, because the degree of closeness of the mechanical parts is relatively not so high when the fasteners are installed, it is easy to produce a certain gap, so that there will be a surface between the metal gaps. Paint flows in, which makes the fasteners susceptible to corrosion during the production process. In the subsequent use process, the tightness of the connection will be affected. The high corrosion resistance of titanium alloy materials is due to the presence of oxygen in the air. After the titanium alloy material and oxygen undergo an oxidation reaction, a protective film is formed on the surface. This layer of film can effectively protect the titanium alloy inside the material from being oxidized, thereby improving the corrosion resistance of the titanium alloy material. However, in the actual machining process of titanium alloy fasteners, due to the continuous changes in the environment, including the temperature and humidity of the surrounding environment, and the oxidation of equipment during the processing, it will lead to titanium alloy fasteners. Corrosion is easy to occur, which is one of the problems that titanium alloy fasteners are prone to in the production process.

1.3 Precision problems in machining of titanium alloy fasteners
In the production and processing of titanium alloys and preserves, the requirements for mechanical precision will be higher. In mechanical production, because the tools are in a state of working wear during each production process, and are calibrated according to the program, the density of titanium alloy fasteners is higher, and the tools are easily worn during the processing process. In the state, the tool is still processed according to the program, it is easy to cause the precision of the compact part in the processing process to be affected. If the precision of the fastener is not strictly controlled within the error range during the entire processing process, the titanium alloy and other materials cannot be closely connected during the use process, which will have a certain impact on the subsequent use. The precision of titanium alloy fasteners in the machining production process is a major problem that needs to be overcome in the production process. Fastener technology products are products made in high-precision production workshops, which have better connection performance.

Effective measures to improve the processing quality of titanium alloy fasteners
2.1 Strengthen the regulation and control of mechanical processing and production equipment
In the process of mechanical production and processing of titanium alloy fasteners, the requirements for equipment and the control of equipment are relatively higher to ensure the accuracy of the equipment in the processing process. The processing of the program on this basis can enable Fasteners are processed and produced within the tolerance range. When choosing a cutting tool during processing, you need to consider the material. It is necessary to consider the degree of damage resistance of the processing tool and the density of the processing tool, what is the rigidity of the processing tool, and whether it can cut titanium alloy-related materials. The cooling fluid of the machinery also needs to be controlled in time. If the cooling fluid of the machinery is too small, it will affect the precision in the processing process. If there is too little cooling fluid, it is necessary to add the cooling fluid in time.
When choosing tools for processing titanium alloy fasteners, because titanium alloy materials are relatively more rigid and dense, when choosing tools, choose tools with higher density as much as possible. In the process of machining, because of the Cutting will cause high temperature. Under high temperature conditions, it is necessary to ensure that the materials of titanium alloy fasteners and cutters will not be affected. Therefore, when selecting materials, you need to choose high temperature resistant materials.
In the process of machining, it is also necessary to consider the sealing degree of titanium alloy fasteners and the roughness of the surface. During processing, the surface needs to be polished to ensure that the fasteners can be accurately connected to the titanium alloy materials and Other materials, so when choosing the coating material on the surface of the fastener, analysis and selection are required.
Because the titanium alloy material is easy to deform during the machining production process, and the elastic modulus of the titanium alloy material is relatively small, the requirements for the fixture during the processing process are also relatively high. In the process of mechanical production and processing, the clamping force of the fixture should not be too large. When the titanium alloy material is clamped, auxiliary fixtures can be selected. In the fixture design, these processing problems should also be considered to avoid Problems related to deformation of fasteners during processing.

2.2 Control the selection of raw materials for mechanical processing
In the machining and production process of titanium alloy fasteners, the selection of titanium alloy raw materials must be controlled in place. The material selection requirements for titanium alloy fasteners are higher. When selecting materials, relevant testing standards must be strictly carried out. According to the fastener standards, in the process of testing, we must ensure that the performance of the fastener material meets the requirements.
When processing on this basis, processing problems are not prone to occur during the processing, and the product's inspection certificate and the product's performance index indicators need to be sorted out and classified. There are many related performance indicators for detecting fasteners, such as the specification, quantity, size of the materials used, and the performance testing of the mechanical properties of the materials, corrosion resistance, and high temperature resistance.

2.3 Improve the working environment of machining and producing fasteners
In the titanium alloy fastener production process, the environmental control of the machining production process is relatively more demanding. Only in the required processing environment can titanium alloy fasteners be processed more standardly and have better fastening performance. , The sealing performance is better. When the product is used, there will be no related quality problems when connecting titanium alloys. During the mechanical production of fasteners, there are requirements for the temperature of the processing environment and the humidity of the processing environment around the processing.
Because the fastener parts produced are related materials of titanium alloy, they are easy to oxidize in the environment. If the temperature and humidity are too high, it is easy to produce chemical reactions in the process of contact with other materials, especially some metal aluminum, metal lead, etc. Chemical materials are more likely to cause secondary chemical reactions. Fasteners produced in this processing environment cannot be used normally. Therefore, the factory needs to take environmental protection measures during the processing of titanium alloy fasteners. Avoid mixing fasteners with other metal products. When controlling the processing environment, you need to have relevant equipment and management work.

2.4 Strengthen the control of machine tools in the fastener production workshop
The machine tool for the production of titanium alloy fasteners needs to be strictly controlled. The precision of the machine tool and the precision of the cutting tool on the machine tool, the quality of the cutting tool, and the material of the cutting tool need to be controlled, and the production must be strictly in accordance with the specifications. It is required to produce within the tolerance of the specification.
The first aspect that needs to be controlled is the structure of the titanium alloy machine tool. During the production process of the parts, the load that needs to be borne will be greater, and the pulling force that needs to be borne will be greater. Therefore, the entire machine tool needs to meet the technical requirements in these aspects, and prepare to reduce the drilling of titanium alloy materials in areas with relatively large tensile forces. The hole should be drilled in an area where the tension is relatively small, so that the accuracy requirements of the titanium alloy fastener material can be guaranteed, and the roughness of the material surface can be guaranteed.
When using lathe technology, we should adopt the more advanced lathe processing and production technology at home and abroad. When introducing lathes, we should have an overall understanding of the processing links of titanium alloy materials as much as possible, and ensure that the titanium alloy is punched during the production and machining process. The degree of precision, especially when using high-hardness and high-rigidity material knives to punch holes, must ensure that the wear of the blade surface is within a certain range, so as to meet the production requirements of titanium alloy fastener materials. After each processing and production, the overall tool must be repaired and polished, and the tool must always be within the error range, so as to ensure that the entire titanium alloy material meets the technical requirements during the machining and production process.

2.5 Strengthen the quality control in the production of fastener machinery
Titanium alloy fasteners need to control the quality requirements of the processed fasteners during the processing process, that is, quality control. In quality control, strict checks are required for the quality control of the lathe, the control of the tools, the control of the processing materials, the control of the workshop environment, etc., and the relevant performance tests of the products need to be carried out on a regular basis. During the grinding and reprocessing, it is necessary to ensure the normal workability of the machine production. Regular inspections of the machine are also required.
In terms of quality control, since there are many special features in various aspects of titanium alloy materials, the material needs to be cooled and protected during the cutting process, especially in this high-temperature processing environment. Good work related to safe processing to reduce the probability of hidden dangers in processing plants. If a fire occurs, talcum powder can be used for fire-fighting related work. All of these should be prepared for relevant plans and measures before the fasteners are processed. If there is an emergency, it must be dealt with in time, especially when there is an emergency, the titanium alloy material is easy to chemically react with other materials. This exacerbates the severity of emergencies, which is the quality control that needs to be done in the machining process.

Concluding remarks
In general, titanium alloy materials have been widely used in recent years. In the process of machining fasteners, the factory should also take relevant processing precautions and make basic processing-related preparations. When machining, know the shortcomings of titanium alloy fastener processing, know how to improve the shortcomings in the processing technology, and continuously improve the requirements of the company's production workshop, I believe that we can produce high-quality, high-precision fastener products.

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