CNC Machining of Machinery Parts

CNC Machining of Machinery Parts

CNC Machining of Machinery Parts, CNC Four-Axis Machining, CNC Lathe Machining, Non-standard Parts Machining, Automobile Parts Machining, Laser Marking, Turning and Milling Complex Machining, Welcome to send drawings for consultation.

…………………………………………………………………..

Sharing Some Operational Skills and Experiences of CNC Machining

In CNC lathe processing, many places need to concentrate on manipulation, so as to prevent some unnecessary problems in the process of manipulation, thereby delaying the progress of work and affecting the efficiency of all work. Underneath, let Xiaobian explain some manipulation skills and experience of CNC Turning processing for everyone! Let’s learn from the window.

I. Programming Techniques

1. Processing sequence of parts:

Drilling first and then flat end (this is to prevent shrinkage during drilling);

First roughing, then finishing (this is to ensure the accuracy of parts);

The first step is to process the larger part and the smaller part (which ensures that the surface of the size of the smaller part is not scratched and prevents parts from deforming).

2. Choose the correct rotational speed, feed rate and cutting depth according to the hardness of raw materials.

1) Carbon steel raw material selection of high speed, high feed, large depth of cut. For example: 1Gr11, S1600, F0.2 and 2 mm cutting depth were selected.

2) Cemented carbide should be selected with low speed, low feed and small depth of cut. For example: GH4033, select S800, F0.08 and cut depth 0.5mm;

3) Titanium alloy should be selected with low speed, high feed rate and small cutting depth. For example: Ti6, choose S400, F0.2 and 0.3mm cutting depth. Take the processing of a part as an example: the raw material is K414, which is a special hard raw material. Through repeated tests, S360, F0.1 and 0.2 cutting depth are selected to produce qualified parts.

2. Knife-setting Techniques

Tool alignment is divided into tool alignment instrument and direct tool alignment. Most lathes in our factory have no tool alignment instrument. For direct tool alignment, the following knife alignment technique is direct tool alignment.

Firstly, the center of the right end face of the part is chosen as the cutter point and set to zero. When the machine tool returns to the origin, the center of the right end face of the part is the zero point for each cutter to be used. When the cutter touches the right end face and enters the Z0 click measurement, the cutter compensation value of the cutter will automatically record the measurement value, which means that the Z-axis cutter alignment is good, X-axis cutter alignment is good. Cutter alignment is a trial-cut tool alignment, with less cylindrical parts of the tool lathe, measuring the value of the outer circle of the vehicle (such as x 20 mm) input x 20, click on the measurement, the cutter compensation value will automatically record the measured value, then the x-axis is also good; this tool alignment method, even if the machine is power-off, calls restart will not change the tool alignment value, can be used in large quantities. Long-term light to produce the same parts, shutting the lathe during the period does not need to start from scratch.

3. Debugging Techniques

In order to prevent errors in the procedure and errors in tool setting and collision, we should first simulate the empty travel, which is 2-3 times the total length of the part when the tool moves to the right in the coordinate system of the machine tool, and then start to imitate the process. After finishing the processing, confirm the procedure and correct tool, then start to process the parts. After finishing the processing of the first part, first self-check, confirm and pass, then find professional check and check. Only after professional check and confirm and pass, can the debugging end.

4. Experience in preventing collision of machine tools

Machine tool collision has a great impact on the accuracy of machine tools. The impact on different types of machine tools is also different. Generally speaking, the impact on machine tools with weak rigidity is greater. So for high precision CNC lathe, the collision must be absolutely prevented. As long as the operator carefully manages the positive anti-collision way, the collision can be prevented and prevented completely.

The main reasons for the collision are: first, the input errors of the diameter and length of the tool; second, the input errors of the dimension of the workpiece and other related geometric dimensions and the positioning errors of the initial position of the workpiece; third, the configuration errors of the workpiece coordinate system of the machine tool, maybe the zero point of the machine tool is reset in the process of processing, and the machine tool changes. Collisions mostly occur in the process of rapid movement of machine tools. Collisions occurring at this time are also harmful and should be absolutely prevented. Therefore, the operator should pay special attention to the machine tool in the initial stage of the implementation of the program and the machine tool in the time of tool replacement. Once the program compilation error, tool diameter and length input error, then it is very easy to collide. At the end of the program, the cutter withdrawal behavior of NC axis is sequential error, then collision may occur.

In order to prevent the collision mentioned above, the operator should fully develop the performance of the five senses when operating the machine tool, and watch whether the machine tool has extraordinary behavior, sparks, noise and extraordinary noise, sensation and burning odor. If the special situation is found, the program should be stopped immediately, and the machine tool can continue to work only after the problem of the machine tool has been solved.

Only by concentrating on accurate manipulation can we prevent the impact of manipulation errors. We trust that people have learned a lot from the beginning and end of this article. Welcome to continue to pay attention to us. We will periodically launch this kind of knowledge of CNC lathe processing and manipulation for everyone to learn.