The collet is a widely used device in the field of mechanical processing. It is used to fix the workpiece and transmit force. It is an important part of the transmission system. The safe use of the collet is very important for workers in the mechanical processing industry. In the following article, we will discuss the common types of collet, safe use methods and maintenance.
一：Common types of Collet
There are many different types of collet, the most common ones are as follows:
1.
Mechanical collet: usually used in benchwork machine tools, including chucks, threaded chucks, jaw chucks, etc. Mechanical collet achieve the function of clamping and releasing workpieces through screw transmission or crank transmission, and are the most common type of chucks in mechanical processing.
2.
Hydraulic collet: Hydraulic collet is usually used on large-scale machining equipment, such as lathes, milling machines, etc.The hydraulic collet clamps and releases the workpiece by compressing the oil, and has high clamping force and stability.
3.
Pneumatic collet: Pneumatic collet are usually used in industrial automation production lines to quickly clamp and release workpieces. Pneumatic collet achieve the clamping and releasing functions by converting air pressure into mechanical motion.
二：Safe use of the collet
When using the collet, you need to pay attention to the following points to ensure safety:
1.
Choose the right collet: The type and specification of the collet should match the requirements of the workpiece. When choosing a collet, factors such as the size, shape, material and clamping force of the workpiece should be considered.
2.
Correct installation: The collet must be correctly installed on the machine tool, and ensure that the chuck jaws and the workpiece surface ,When tightening, the operation should be carried out according to the use requirements of the collet to ensure that the force at the chuck is evenly distributed.
3.
Pre-processing inspection: Before clamping the workpiece, check whether the collet and fixture are installed correctly. Check whether the clamping force of the collet is sufficient, and make sure there are no foreign matter and scratches at the clamping mouth to avoid damage to the workpiece.
4.
Balanced distribution of attention during processing: During machining, attention should be evenly distributed to ensure that the clamping force of the collet and the force on the workpiece are evenly distributed. When running at high speed, a special collet should be used to ensure the safety performance of the clamping mouth.
5.
Release the chuck promptly after machining: After clamping the workpiece, if you need to replace the workpiece or replace the collet, please release the chuck promptly to ensure that the collet can completely release the workpiece. When the collet needs to be replaced or repaired, the operation must be performed after the machining is stopped.
三： Maintenance of the collet
The maintenance of the collet is very important. It can extend the service life of the collet and avoid collet failure and accidents. The following are some suggestions for collet maintenance:
1.
Cleaning: After use, the collet and fixture should be cleaned in time and wiped dry thoroughly. When cleaning, detergent or decontaminant should be used, and acidic or alkaline corrosive substances should not be used.
2.
Lubrication: The spiral transmission part and other moving parts of the chuck need to be lubricated to ensure smooth operation. The lubrication condition of the collet should be checked regularly, and lubricant should be added or lubricating oil should be replaced in time.
3.
Inspection: During use, the clamping jaws, screws and fastening devices of the collet should be checked regularly to see if they are tight. If any problems are found, they must be repaired or replaced in time to ensure the safety and reliability of the collet.
4.
Storage: When not in use for a long time, the collet should be stored in a dry, ventilated place away from direct sunlight. Before storage, the collet should be cleaned and coated with rust inhibitor to avoid corrosion and oxidation.
In short, the collet is an indispensable equipment in the machining industry, and it plays a vital role in the development and production efficiency of the machining industry. Proper use and maintenance of the collet can ensure its safety, reliability and service life, and maximize production efficiency. Therefore, we must continuously strengthen the safety management and maintenance of the collet to jointly promote the development of the machining industry.