With the development of science and technology in recent years, various kinds of flange equipments are used in people's life and work, which bring great convenience to people's life. However, in the processing and manufacturing engineering of flange, deep hole machining has been a technical difficulty, because of its own existence of complex process, operating technical difficulties, quality requirements standards, and other characteristics, so in the following will be a large number of deep hole machining technology research, explain how to improve the effect of deep hole machining, prompting the quality of flange machining to be improved.
In the deep hole machining of the flange, the length-to-diameter ratio of the hole is generally ≥ (5-10), but in practice, the depth of these holes is also large, so it becomes a difficult point in the processing. At the same time, in the processing of flanges, deep hole processing accounts for 40% of the total processing task, so it is very necessary to study and improve the deep hole processing technology. In the following, the characteristics of deep hole technology and ways to improve will be discussed.
1. Characteristics of deep hole machining
In the deep hole machining of the flange, most of the working environment is a closed environment or a semi-closed environment, which largely enhances the operational difficulties, the cutting of the tool, the tool cannot be grasped promptly, making it more difficult to carry out the machining operations. At the same time, the proportion between the radius and depth of the hole is large, which is not conducive to the discharge of metal residues inside, it is easy to cause internal blockage, making it difficult to carry out deep hole processing operations. In addition, if the processing drill bit is long, it will reduce the "rigidity" of the flange. In contrast, the drill bit jitter and deviation from the hole, the processing quality of the flange is difficult to guarantee.
(2) Complex process and high quality requirements
The process is extremely complex when deep hole machining, making it difficult to control the machining quality. One of the more complex processes is the tool running, feeding mode, and other steps, which makes it difficult to control the focus of the processing; in addition, if the deep hole machining of the residual chip discharge processing is not appropriate, will also affect the smooth progress of the processing operations. At the same time, deep hole machining is the most important part of flange machining; if the quality of this stage is not effectively controlled, it will threaten the overall effect of flange machining, so the processing should be strictly controlled for each process, especially deep hole machining is the most important, to satisfy the control of the processing quality, and to improve the overall quality.
2. Enhance the quality of deep-hole machining technology points
(1) Equipment selection and preparation
To ensure the quality of deep-hole machining, the first thing to do is to do a good job in selecting and preparing deep-hole machining equipment to lay a good foundation for later operation. Deep hole machining is generally the choice of professional machining equipment; the most important part is the choice of machine tools and machine tool parts. The necessary tools include the spindle box, feed box, shanks, tool clamping equipment, the main part of the machine tool, the center frame, auxiliary equipment, rotating speed, and other equipment. in the completion of the selection of the equipment, we must make preparations for the equipment, do a good job in the installation and debugging of the equipment, and let the technicians of the equipment Practical operation, so that they understand and master the equipment. At the same time, to strengthen the training of technicians, these factors are necessary for deep hole machining; before starting the work must meet the needs of deep hole machining to create a good foundation for improving machining quality.
(2) Selection and design of process route
The selection of a reasonable process route for deep-hole machining technology is significant, but it also creates good conditions for deep-hole machining. In the process route selection, first of all, the deep hole machining technology should be a comprehensive consideration, specifically on the technical method, the adaptability of the cutting tool, the characteristics of the flange, the characteristics of the material, and other aspects to be considered. Secondly, we should choose the specific processing steps; general deep hole machining technology is divided into three stages: roughing, semi-rough machining, and finishing. At the same time, according to the different stages of machining to choose different processing technologies, efficiency rises to promote the quality of processing operations. At the same time, in the design and selection of the machining process, to make the corresponding design program, to the structure of the flange to be processed, features, precautions, etc., for comprehensive consideration to optimize the design program to reduce the work error and error, so that the quality of the processing is guaranteed. Also reserved machining allowance, but to meet the process and machining quality requirements.
(3) Deep hole machining tool selection
As we all know, the selection of tools is an important element in deep-hole machining, directly affecting the quality of deep-hole machining. Common deep hole machining tool styles are many; the most common are flat drill, twist drill, with chip removal function of the drill, spray suction drilling, gun drilling, etc., in the deep hole machining operations, according to the specific operating environment and the required operation of the flange to choose the appropriate processing tool, after the selection of the tool to do a good job in the tool installation and debugging, so that the tool to meet the needs of the deep hole machining operations for the smooth implementation of the Deep hole machining operations to lay a solid foundation.
(4) Deep hole machining positioning
As with other flange machining operations, deep hole machining is to determine the location of the processing so the flange is accurately located to meet the needs of deep hole machining. The common precise positioning technology on the market at present is taper positioning, and this positioning method is widely used in holes such as rotary bodies, small and medium-diameter straight holes, and pipe embryo boring. Meanwhile, internal taper positioning can be used for internal row-cutting work in medium-diameter holes. In taper positioning, paying attention to the straightness and margin and other aspects of precise control, the drilling and boring, and another front surface of the inner and outer taper processing are necessary. In addition, the large diameter of the deep hole processing should use used round positioning method. Still, the circular positioning method, to be installed in the hole on the outer circle of the mounting surface, positioning surface, the front side, etc., must ensure that all three are at the same level, all three are concentric circles, only then can guarantee the accurate positioning of deep hole processing, and then to enhance the quality of the processing to create a very good foundation.
(5) Cutting residual chip processing
Due to the deep hole machining operations working environment is closed, so how to deal with the residual chips generated by the tool cutting is a major problem. To solve this problem, you can add a chip removal device or cooling system in the case of a relatively large diameter. For example, in deep hole machining operations, deep hole drilling process can be 6-8 mm deep hole operations can be used for internal cooling of the working tool, so that the deep hole machining operations, cutting fluid through the deep hole drilling internal liquid cooling channel to reach the tip of the drilling, to so that it will produce .0-3.0 Mpa pressure so that the chips will be flushed out to solve the dilemma of residual debris difficult to deal with, and thus enhance the deep hole machining efficiency.
In summary, although deep hole processing is a difficult flange processing, but also one of the key points processing operations should be based on different situations to choose different processing methods to meet the needs of deep hole processing operations while doing a good job of deep hole processing of various environments to prepare for the work, and strictly by the scientific process of operation so that the quality of processing has been improved.