CNC MILLING MACHINE FOR SALE

What are the advantages of CNC milling machine processing?

CNC milling machine is mainly used for machining various complex plane, curved surface and shell parts.For example, milling of various cams, molds, connecting rods, blades, propellers and boxes

The main machining types are: plane parts, surface parts and variable angle parts. If the machining part is a frame plane or steps of different heights, the CNC milling machine with linear system can be selected. If the machining part is the contour of the surface, two coordinate linkage and three coordinate linkage systems should be selected according to the geometric shape of the surface. Also according to the parts processing requirements, on the basis of the general CNC milling machine, increase the NUMERICAL control division head or numerical control rotary table, then the machine tool system for the four-coordinate NUMERICAL control system, can process spiral groove, blade parts. CNC milling machine processing mainly has the following advantages:

1. Flexible processing, strong versatility

The CNC milling machine is flexible, universal and versatile. It can process workpieces of different shapes, especially suitable for processing complex molds. It can complete drilling, boring, milling plane, milling inclined plane, milling groove, milling curved surface, tapping thread and other processing on the CNC milling machine. With the use of the fourth axis, it does not need to clamp workpieces for many times, and all processes can be completed at one time.

2. High machining accuracy

The same batch of products with good size identity, CNC milling machine processing accuracy than manual milling machine to much higher, can process many complex surface, in a variety of complex mold processing more prominent its performance superiority.

3.High production efficiency

Highly concentrated process greatly improve the production efficiency, reduce the workpiece clamping error caused by many times, CNC milling machine can be relatively simple to choose the best cutting dosage.  Also has fast forward, fast back, fast positioning function, greatly reduce the maneuver time.

The use of CNC milling machine can improve the working conditions of workers, greatly reduce labor intensity. The processing speed of NC milling machine is 3-5 times that of manual milling machine, and it can even reach dozens of times in the production of complex workpieces.

Machining capability of different CNC milling machines.

Small specifications of the lifting table CNC milling machine, its worktable width is small, it is the most suitable for small and medium-sized parts processing and complex profile milling tasks.  Larger specifications such as gantry type milling machine, workbench is larger, used to solve the processing needs of large size complex parts.

CNC milling machine machining accuracy

China has developed CNC milling machine precision standards, CNC vertical milling machine lift table milling machine has professional standards.  The standard stipulates that the positioning accuracy of the linear motion coordinates is 0.04/300mm, the repeating positioning accuracy is 0.025mm, and the milling precision is 0.035mm.  In fact, the machine tool factory accuracy has a certain amount of reserves, than the national standard allowable value about 20% compression.  Therefore, from the point of view of precision selection, the general CNC milling machine can meet the processing needs of most parts.  For high precision parts, precision CNC milling machine should be considered.

Choose manual milling machine or CNC milling machine?

For large quantities, users can use special milling machines. If it is a medium and small batch and is often put into production repeatedly, it is very appropriate to use NC milling machine, because many fixtures and programs are prepared in the first batch, which can be stored and reused. In the long run, it is inevitable that the milling machine with high degree of automation will replace the ordinary milling machine to reduce the labor volume of workers and improve productivity.

Precautions for machining process of CNC milling machine:

1. When processing parts, the protective door must be closed, the head and hand are not allowed to stretch into the protective door, and the protective door is not allowed to be opened during processing;
2. In the process of machining, the operator shall not leave the machine tool without authorization. He shall maintain a high degree of concentration and observe the running state of the machine tool. In case of any abnormal phenomenon or accident, the program operation shall be terminated immediately, the power supply shall be cut off and reported to the instructor in time, and other operations shall not be carried out;
3. It is strictly prohibited to tap the control panel and touch screen. It is strictly prohibited to knock the workbench, dividing head, fixture and guide rail.
4. It is strictly prohibited to open the CNC system control cabinet for viewing and touching.
5. The operator shall not change the internal parameters of the machine tool at will. Interns shall not call or modify other programs not compiled by themselves.
6. On the machine tool control microcomputer, other operations are not allowed except program operation, transmission and program copy.
7. CNC milling machine belongs to large and fine equipment. Except for tooling and workpieces placed on the workbench, it is strictly prohibited to stack any tools, clamps, blades, measuring tools, workpieces and other sundries on the machine tool.
8. It is forbidden to touch the tool tip and iron filings by hand. Iron filings must be cleaned with an iron hook or brush.
9. It is forbidden to touch the rotating spindle, workpiece or other moving parts by hand or any other means.
10. It is forbidden to measure the workpiece and change the speed manually during processing, and it is not allowed to wipe the workpiece with cotton yarn or clean the machine tool.
11. Do not perform tentative operations.
12. When using handwheel or fast moving mode to move the position of each axis, be sure to see the machine tool X, Y, Z axis in each direction of the number of signs and then move.  When moving, slowly turn the hand wheel to observe the correct movement direction of the machine tool before speeding up the movement speed.
13. When the workpiece size must be suspended during the operation of the program, it can be measured only after the machine tool stops completely and the spindle stops, so as to avoid personal accidents.
14. When shutting down, wait for the spindle to stop for 3 minutes before shutting down.

Why can’t small vertical CNC machining center complete automatic tool change?

The advantage of small CNC machining center in work is that it can realize automatic tool change and complete various processes of workpiece. Because the tool change is completed automatically, and the tool change failure will occur in the actual use process (the tool cannot be changed automatically), what is the reason why the small CNC machining center cannot complete the tool change?

Reasons and treatment methods for failure of tool change in small CNC machining center:

1. The manipulator does not return to the origin or the system does not collect the manipulator origin signal. Check whether the tool magazine circuit and air circuit of small CNC machining center are normal;
2. The solenoid valve of the tool sleeve turnover cylinder failed, and the tool sleeve return action was not performed. Check whether there is a problem with the manual clamping tool of the CNC small machining center;
3. The air path of the tool sleeve turnover cylinder is faulty, such as insufficient air pressure, blocked air path, etc. Check whether the air pressure of the CNC small machining center system is normal;
4. The air path of the tool sleeve turnover cylinder is faulty, such as insufficient air pressure, blocked air path, etc. Check whether the air pressure of the CNC small machining center system is normal;

With the increase of purchase time, as well as the use of higher frequency, CNC milling machine failure in operation is a normal phenomenon, customers do not worry, not to dismantle the machine without authorization.  You can contact Tsinfa company as soon as possible.  We have a professional after-sales team, will as soon as possible for you to troubleshoot the cause of the machine and repair the normal .