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Common terms for machining of mechanical parts

October 18, 2022

In the field of mechanical parts processing industry, there are very many technical terms, so we all know what these terms mean? Today let me share the common terms of mechanical parts processing!

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1:What do you mean by plate thickness treatment?

A: The method taken to eliminate the influence of the plate thickness on the shape and size of the unfolded drawing.


2: What are the general steps to calculate the unfolded length of the bent parts?

A: The bending part is divided into straight and circular segments; the length of each segment is calculated separately; the calculated lengths are added together.


3: Under what circumstances should the cutout of the section be applied?

A: Angle, channel, I-beam bent into a folded angle.


4: What are the stages of the whole punching process?

A: In three stages. Elastic deformation stage; plastic deformation stage; shearing stage.


5: What is punching and cutting?

A: A stamping process in which one part of the sheet is separated from another part along certain closed lines using a punching template.


6: How many types of bolted couplings are there?

A: There are two kinds of couplings: the coupling to withstand the role of axial tensile load; the coupling to withstand the role of lateral.


7: What are the measures to prevent loosening of the bolt coupling?

A: Increase the friction; mechanical anti-loosening.


8: What are the mechanical anti-loosening methods?

A: cotter pin; stop washer; stop washer; tandem steel wire.


9: What is called the welding arc?

A: In the gas medium between the two electrodes to produce a strong and persistent discharge phenomenon.


10: welding arc consists of which parts?

A: By the cathode area; anode area and arc column.

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11: What are the three directions of movement of the welding rod?

A: Moving in the direction of the molten pool; moving in the direction of welding; making a lateral swing.


12:Welding seam can be divided into several types according to the spatial position?

A: It is divided into flat welding, vertical welding, horizontal welding and back welding.


13: What are the characteristics of coherent line?

A: It is both the common line and the dividing line on the surface of two forms; it is always closed in space.


14:What do you mean by coherent line?

A: A component consisting of two or more intersecting geometries.


15:What are the factors that affect the quality of punching?

A: Die clearance; the centerline of convex and concave die does not overlap; the working edge of die is worn and dulled.


16: What is the general principle of die design?

A: Under the premise of ensuring the quality of stamping, we should strive to design a die that is easy to manufacture, simple in process

Low cost and easy to use.


17: What is the purpose of calculating the calendering force?

A: It is for the correct selection of calendering equipment.


18: What is called free bending?

A: When the end of bending convex die, blank, concave die coincide with each other after the impact no longer occur.


19: What is called correction bending?

A: The convex die, blank and concave die, after the coincidence of the three, there is an impact on the bending parts to play a corrective role.


20:What defects are easily produced when pressing the head?

A: Wrinkling and puckering; straight edge indentation crater; micro-crack on outer surface; longitudinal tearing; skewing; ellipse; inconsistent diameter size.