1: What challenge thick processing?
Answer: The method adopted to eliminate the influence of plate thickness on the shape and size of the expanded graph.
2. What are the general steps to calculate the length of bending?
Answer: divide the bending part into straight section and circular section;Calculate the length of each paragraph separately;Add the calculated lengths.
3: Under what circumstances should the section steel be used for cutting blanking?
Answer: Angle steel, channel steel, I - beam bend into bend Angle.
4. Which stages are there in the whole blanking process?
A: There are three stages.Elastic deformation stage;Plastic deformation stage;Shear crack stage.
5: What is blanking?
Answer: the stamping process of separating one part of the sheet metal from another part along a certain closed line with the use of punching formwork.
6: How many kinds of bolt connection?
Answer: there are two kinds of connection: bearing axial tensile load;A connection subjected to lateral action.
7: What are the anti-loose measures for bolt connection?
A: Increase the friction;Mechanical loosing.
8: What are the ways to prevent mechanical loose?
Answer: opening pin;Check washer;Stop washer;Tandem wire.
9: What is welding arc?
A: A strong and persistent discharge occurs in the gaseous medium between the two electrodes.
10: What parts do welding arcs consist of?
Answer: By the cathode area;The anode area and arc column are composed.
11: Which three directions does the electrode move in?
A: Move towards the molten pool;Move in the direction of welding;Make a lateral swing.
12: How many kinds of welds can be divided into according to the space position?
Answer: divided into flat welding, vertical welding, horizontal welding, vertical welding.
13: What are the characteristics of the intersecting line?
Answer: it is the common line of two body surface also is dividing line;Space is always closed.
14: What is the intersecting line?
A: A component consisting of the intersection of two or more geometric objects.
15: What are the factors affecting blanking quality?
Answer: mold clearance;The center line of the convex and concave die does not coincide;The working edge of the mould wears away and becomes dull.
16: What are the general principles of mold design?
A: in order to ensure the quality of stamping die design, easy to manufacture, simple process, low cost, easy to use.
17: What is the purpose of calculating calendering force?
Answer: it is to choose rolling equipment correctly.
18: What is free bending?
Answer: at the end of bending, punch, blank and die will not have impact after they coincide.
19: What is correction bending?
Answer: refers to the punch, the blank, the concave die, three after the anastomosis still has an impact, has the correction function to the bending piece.
20: What defects are likely to occur when the head is pressed?
Answer: Wrinkling and bagging;Straight side pull mark indentation;External surface microcracks;Longitudinal tear;Deflection;Elliptic;The diameters are inconsistent.