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A: Anti-deformation method, rigid fixing method, reasonable welding sequence.
37: What are the characteristics of spatial linear projection?
A: Authenticity, accumulation, contraction.
38: What is the intercept line? Ev.cpkso.com A: The intersection line produced by the plane cutting body.
39: What is the intersection line?
A: The surface intersection line produced by the intersection of two planes.
40: What are the views?
A: divided into basic view, partial view, oblique view, and rotated view.
41: What is the basic view?
A: The view from which the part is projected onto the basic projection surface.
42: What are the basic views?
A: Main view, top view, left view, right view, bottom view, rear view.
43: Which are the cross-sectional views?
Answer: It is divided into full section, half section and partial section.
44: What is the effect of cutting amount on drilling?
A: Reasonable choice of cutting amount can prevent premature wear or damage of the drill bit. Prevent machine tool overload and improve workpiece cutting accuracy and surface roughness.
45: What is tapping?
A: Use a tap to cut the internal thread on the hole wall.
46: What is the effect of the diameter of the bottom hole on the work wire?
Answer: If the diameter of the bottom hole is the same as the diameter of the internal thread, the tap will be caught when the material expands. At this time, the tap is easy to break. If it is too large, the height of the tapped thread will be insufficient to form a waste.
47: What is ferrule?
A: Cut the thread on the outer diameter of the round rod tube with a die.
48: What principles should I pay attention to when choosing a groove?
Answer: (1) Minimize the amount of weld metal filling, (2) ensure penetration and avoid cracking, (3) consider minimum welding deformation, and (4) facilitate processing.
49: What is the role of leaving the blunt edge when opening the groove?
A: Prevent the connector from burning through.
50: What are the methods for opening the groove?
Answer: It is processed by air shovel, mechanical processing, gas cutting groove, carbon arc gouging groove.
51: What is carbon arc gouging? Ev.cpkso.com A: The local melting of the metal is carried out by the high temperature of the carbon arc, and at the same time, the molten metal is blown off by the flow of compressed air to achieve the purpose of planing or cutting metal.
52: What is the purpose of grinding?
A: It can eliminate the burrs on the edge of the surface of the plate, repair the weld and polish the weld before the weld is inspected.
53: What is bending forming?
A: The flat blank, profile or pipe is bent into a certain angle and curvature to form a certain shape of the part.
54: A: What is the phenomenon of bombing?
Answer: The material is elastically deformed when bent. When the external force is removed, part of the elastic deformation returns to the original state, which changes the shape and angle of the curved part.
55: What are the common bending methods used by riveters?
A: There are bending, rolling, rolling and water-fire bending.
56; What are the factors that affect bending?
A: bending force, elastic phenomenon, minimum bending radius, sectional shape.
57: How to determine the amount of bending force?
A: According to the mechanical properties of the material being bent, the bending mode and the nature, the shape of the curved piece.
58: What are the factors that affect the bending resilience?
A: The mechanical properties of the material being bent, the relative bending radius of the material, the bending angle and some other factors.
59: What are the factors that affect the minimum bend radius?
A: The mechanical properties of the material being bent, the bending angle, the direction of bending of the material, the surface quality of the material and the quality of the cut section, and other factors.
60: What are the factors that affect the shape change of the section during bending?
A: There are mainly relative bending radii, cross-section geometry and bending method.
61 How does steel heating affect the bending of steel?
Answer: The bending force required for steel heating is reduced, the rebound phenomenon disappears, and the minimum bending radius is reduced, which is beneficial to control deformation according to processing requirements.
62: Under what circumstances is it usually heated and bent?
A: Use it at room temperature.
63: Why is the steel heating temperature limited to a certain temperature?
Answer: If the temperature is too high, the steel will be over-fired. If the temperature is too low, the molding will be difficult and cause cold hardening.
64: What measures are often used to solve the bounce problem when using contact bending?
A: Correct the shape of the mold, use the pressure correction method, increase the crimping device, and reduce the gap between the molds.
65: What is the bending?
A: The bending method is used to bend the mold on the press.
66: How many forms does the material have to bend?
A: There is free bending, contact bending, and correction of bending.
67: Why do the stampers used in riveting usually use welded structures?
A: Because it is not only easy to manufacture, it can shorten the molding cycle, and can also improve material utilization and reduce costs.
68: What is rolling?
A: The processing method of bending forming on a rolling bed.
69: What measures are often used to eliminate the straight edge of the workpiece with a symmetrical three-roller?
Answer: Both sides bend and leave machining allowance.
70: Which two types of calendering can be divided into? What is the common use of riveting?
Answer: The part is not thinned and thinned and calendered. Riveters are often used without constant thin rolling.
LIM & LSR Molding, also known as LSR & Liquid Silicone Rubber Molding and LSR Injection Molding (LIM) & Silicone Injection Molding, is a process to pump the high purity platinum cured silicone (supplied in barrels: A + B components at 1:1) through a static mixer for into the heated cavity and vulcanized, which is suitable for the production requiring high quality, high precision and high volume.
LIM & LSR Molding is typically applied for sealing membranes, electronics, infant products, medical products and overmolded products, etc.
Practical machining knowledge
36: What are the measures to prevent welding deformation?