Which one is better for Shenzhen machining? Recommend Shenzhen Riqiya

Which one is better for Shenzhen machining? Shenzhen Riqiya, a foreign-funded enterprise, was established in 1992, mainly engaged in cold stamping, manufacturing and assembly, copiers, fax machines, typewriters, cameras, micro-motor automation office equipment parts, automobiles R&D and manufacturing of parts and components. The following editor will talk to you about the necessary operating skills for machining!

    One, programming skills

    CNC is committed to the production of high-precision machining centers, and it is also convenient to meet the high-precision requirements of future processed products. Therefore, the items to be considered in the programming process are:

    1. Parts processing sequence:

    1. Drill the flat end first (to prevent shrinkage when drilling);

    2 Rough turning first, then fine turning (this is to ensure the accuracy of the parts);

    3. The one with large processing tolerance is small (to ensure that the surface of small tolerance is not scratched, and to prevent deformation of parts).

    2. Article 2. Choose a reasonable cutting speed, feed and depth according to the hardness of the material:

    1Cemented carbide is selected for low speed, low feed rate, and small cutting depth. Such as: GH4033, select S800, F0.08, cutting depth 0.5mm;

    2 The carbon steel material is selected for high speed, high feed rate and large depth of cut. Such as: 1GR11, select S1600, F0.2, and the cutting depth is 2mm;

    3 Titanium alloy uses low speed, high feed rate and small depth of cut. Such as: ti6, select s400, f0.2, and the cutting depth is 0.3mm. Take a part of the workpiece as an example: the material is K414. This material is a special hard material. After many tests, S360, F0.1, cutting depth 0.2 are finally selected to process qualified parts.

    Second, the knife

    Tools are divided into tool setting tools and direct tool setting. Most of our lathes do not have tool setting tools. For direct tool setting, the following tool technology is direct tool setting.

    First select the center of the right end of the part as the tool point and set it to zero. After the machine returns to the origin, every tool that needs to be used will be a tool with the center of the right end of the part at zero. The tool touches the right end and enters Z0 for measurement. The measured value is automatically recorded in the tool compensation value. This means that the Z axis is correct for the tool. The X tool is a trial cutting tool. The outer circle of the tool cart part is small, and the outer circle value is measured. If X is 20 mm), enter X20 and click Measure, the tool compensation value will automatically record the measured value, and the X axis is also correct; this tool setting method will not change even if the machine is powered off and called after restart. The value of the knife can be applied to the production of the same part in large quantities for a long time, and the turning of the lathe does not need to be reworked.

    Three, debugging skills

    After part programming, trial and error debugging must be carried out after the tool is finished. In order to prevent errors in the program and tool errors from causing collision accidents, the empty stroke simulation processing must first be carried out in the machine tool coordinate system. The tool converts the total length of the part to the right by 2 times to 3 Euros, and then starts the simulation process. After the simulation is completed, the confirmation program and correction of the tool are correct. Then the parts are processed. After a part of the processing is completed, the self-check is performed first. After the qualification is confirmed, a full-time inspection is carried out. After full-time inspection and confirmation, the commissioning is over.

    The fourth is to prevent machine collision

    Machine tool collision is a great damage to the accuracy of the machine tool. It has different effects on different types of machine tools. Generally speaking, it has a great impact on machines with lower stiffness. Therefore, for high-precision CNC lathes, collisions must be eliminated. As long as the operator is careful and masters certain anti-collision methods, collisions can be completely prevented and avoided.

    The main cause of collision:

    First, input the error of the tool diameter and length; second, the input error of the workpiece size and other related geometric dimensions and the initial position error of the workpiece; third, the workpiece coordinate system of the machine tool is set incorrectly, or the machine zero is reset during the machining process, the machine tool During rapid movement, machine tool collisions often occur. At this time, collisions are also the most harmful and should be absolutely avoided. Therefore, in the initial stage of program execution and machine tool replacement, the operator should pay special attention to the machine tool. Once the program is edited incorrectly and the diameter and length of the tool are incorrectly entered, the collision will be easy. At the end of the program, if the CNC axis retraction sequence is wrong, a collision may occur.

    In order to avoid the collision mentioned above, the operator should give full play to the functions of the five senses when operating the machine tool, and observe whether the machine tool has abnormal movements, sparks, noises and abnormal noises, vibrations, and burnt odors. The program should be stopped immediately when the abnormal situation is found, and the machine tool can continue to work after the problem of the standby bed is solved.

    Five, complete the processing of the parts

    After the first piece of trial cutting is completed, the parts will be mass-produced, but the first piece's qualification does not mean that the entire batch of parts will be qualified, because in the processing process, the tool will wear out due to the difference in the processing material. If the tool is soft, the tool wear is small, the processing material is hard, and the tool wears quickly. Therefore, in the process of processing, it is necessary to check frequently to increase and decrease the tool compensation value in time to ensure that the parts are qualified.

    Take a part as an example, the processing material is K414, and the total processing length is 180mm. Because the material is extremely hard, the tool wears very quickly during processing. From the starting point to the end point, the tool wear will produce a slight degree of 10€20mm. Therefore, we must In the program, a slight degree of 10€€€20mm is artificially added, so that the qualified parts can be guaranteed.

    In short, the basic principle of machining: rough machining first, remove the excess material of the workpiece, and then finish machining; avoid vibration during machining; avoid thermal denaturation during workpiece machining. There are many reasons for vibration caused by excessive load. Large; it may be the resonance of the machine tool and the workpiece, or it may be caused by the insufficient rigidity of the machine tool, or it may be caused by the tool passivation. We can reduce the vibration by the following methods; reduce the transverse feed and the processing depth, and check Whether the workpiece is clamped firmly, increase the speed of the tool and reduce the speed to reduce the resonance. In addition, check whether it is necessary to replace the tool with a new one.

    Mastering the operating skills of CNC machine tools is a gradual process and cannot be accomplished overnight. It is based on mastering the basic operation of the machine tool, basic machining knowledge and basic programming knowledge. The operation skills of CNC machine tools are not static. It is an organic combination that requires full use of imagination and practical ability according to the actual needs of customers. It is an innovative work.