Knowledge

Seven ways to detect positioning accuracy of CNC machine tools (3)

6. Repeatable indexing accuracy test of rotary table The measurement method is to repeat positioning 3 times at any three positions within one week of the rotary table, and test in the forward and rev

Keep these 20 mechanical design knowledge points (3)

11. Necessary conditions for forming dynamic pressure oil film (1) There must be a wedge-shaped gap between the two working surfaces. (2) The space between the two working surfaces must be continuousl

Keep these 20 mechanical design knowledge points (2)

6. Advantages and Disadvantages of Belt Drives Advantages: (1) Suitable for transmission with large center distance. (2) The belt has good flexibility, which can alleviate impact and absorb vibration.

Keep these 20 mechanical design knowledge points in mind to reduce the chance...

1. What are the reasons and measures for preventing threaded connections from loosening? Reason: Under the action of impact, vibration and load change, the pretightening force of threaded connections

The optimal speed for lathe turning external threads

When CNC lathes process threads, due to changes in the transmission chain, in principle, the speed should only be able to ensure that the tool displaces one pitch along the main feed axis (mostly the

Questions and answers on machining process knowledge, essential foundation fo...

1. What are the three methods of clamping workpieces? {1. Clamp in the fixture; 2. Find the correct clamp directly; 3. Mark the line and find the correct clamp} 2. What does the process system include

The difference between positioning accuracy and repeat positioning accuracy

Positioning accuracy and repeat positioning accuracy are two different concepts Commonly used in industry to describe the performance of mechanical systems. Repeat positioning accuracy is higher than

What are the QC, IQC, IPQC and QA often mentioned in machinery factories?

QC Quality Control, quality control, product quality inspection, analysis and improvement after quality problems are discovered, and the general term for the personnel involved in the control of non-c

The relationship between dimensional tolerance, geometric tolerance and surfa...

1. The numerical relationship between dimensional tolerance, geometric tolerance and surface roughness: 1. Numerical relationship between shape tolerance and dimensional tolerance When the dimensional

The code meanings of NPT, PT, PF and other threads!

BSPT and BSP British Specification Taper Threads NPT US specification taper thread PT Japan's old JIS standard taper thread, equivalent to ISO standard R, Rc DIN2999 European, mainly German pipe t

What is die casting

Die casting is a process of metal smelting and processing. It is a casting method in which molten alloy liquid is filled into the cavity of a steel mold at high speed under the action of high pressure

Is aluminum alloy die-casting harmful to the environment? What precautions ar...

Aluminum alloy die-casting is a common manufacturing technology that produces many of the products we use every day. However, this processing technique can also cause harm to the environment. In this