1: what are the main forms of metal structure?
Answer: there are frame structure, container structure, box structure, general component structure.
2: The Riveter operation according to the processes in nature can be divided into several parts?
Answer: divided into preparation, lofting, molding, assembly and connection.
3: metal structure connection method which has several?
Answer: riveting, welding, riveting and welding mixed connection, bolt connection.
4: in the mechanical manufacturing industry belongs to the riveter (thermal processing class).
5: what is called hot processing?
Answer: metal materials all or part of the heating molding.
9: what is the structure of the framework?
Answer: to profile as the main body.
7: the structure of the container is made of what is the main structure?
Answer: with sheet as the main body.
8: the box structure and the general structure are made of (sheet material) and (profile) mixed manufacturing structure.
9: refers to the material (raw material) and preparation (part blank).
10: in the steel plate (transport, dipping, storage) process can cause deformation.
11: the steel deformation will affect the parts (lifting, cutting, cutting and other processes) normal.
12: if not corrected deformation parts produced during the processing, it will affect the structure (the correct assembly) and 1
13: welding deformation will reduce the assembly (accuracy), so that additional stress within the steel structure, affecting the strength of the component.
14: flat steel deformation (bending, twisting, bending and torsion complex deformation).
15: multi roller straightening machine, according to the arrangement of roller shaft and the position of adjustable roller, which can be divided into?
Answer: can be divided into the upper and lower roller parallel straightening machine, the upper and lower roller tilt correction machine.
16: what are the heating methods of flame correction?
Answer: dotted, linear, triangular heating.
17: what factors determine the effect of flame correction?
Answer: determined by heating position and heating temperature.
Spring, summer, autumn and winter take a healthy road, look at the Four Seasons Health nets
Healthy diet, health issues, maternal and child health care, common sense
18: what are the methods of correction?
Answer: mechanical correction, manual correction, flame correction, high frequency heat hinge.
19: what is the first step in making a metal structure?
Answer: setting out and marking materials are the first steps in making metal structures.
20: what are the effects of lofting and marking on the product?
Answer: it will directly affect the quality of the product, has a direct impact on the production cycle and cost.
21: what are the quantities used for setting out?
Answer: a wooden folding ruler, a ruler, steel tape, steel ruler etc..
22: what are the common tools for setting out?
Answer: there are compasses, ground rules, samples, strokes, small hammers.
23: what is the procedure of setting out the scale?
Answer: procedures are linear lofting, structural lofting, expansion lofting.
24: what are the contents of the lofting?
Answer: there are plate thickness processing, expansion drawing, production number model.
25: the model according to its use classification, which kinds?
Answer: have material model, test model, positioning sample.
26: what materials are used in making patterns?
Answer: use a thick 0.5--2 mm sheet iron.
27: model, sample rod painting, which are the main kinds?
Answer: there are straight-line drawing method, transition drawing sample method.
28: how to do reasonable materials?
Answer: to focus on sets, surplus material utilization.
29: what kinds of curves?
Answer: it is divided into plane curve and space curve.
30: what is the method of straight line length?
Answer: there are rotation method, right triangle method, branch line method, change surface method.
31: what is the process of lofting?
Answer: through geometric drawings, first draw the intersection line, the long line, the cross section solid shape, and then make the expansion map.
32: what is the basic method of plane intersection?
Answer: ridge method and edge plane method.
33: what are the basic methods for finding the intersection of curves?
Answer: longitude and latitude.
34: what is the main method of intersecting lines?
Answer: auxiliary plane method, plain line method, spherical surface method.
35: what are the characteristics of intersecting lines?
Answer: (1) the intersecting line is the common line and dividing line of the intersection of the two bodies. (2) because the form has a certain range, the intersecting line is always closed.
36: what is called intersection line?
Answer: the intersection of the plane and the solid surface.
37: what is the prime line?
Answer: any part of the bus bar on the surface of the component is called a prime line.
38: what are the common methods of unfolding?
Answer: there are parallel line method, radial method, triangle method.
39: what is the division of the sphere usually?
Answer: there are band method, block method, split valve method.
40: what are the main contents of plate thickness treatment?
Answer: determine the neutral layer of the bending element and eliminate the plate thickness interference.
41: angle bending material length, according to what calculation?
Answer: by the center of gravity calculation.
42: shear line shears are there?
Answer: Longmen oblique oblique bar shearing machine, shearing machines, combined punching and shearing machine.
43: what kind of machine tools are there in the shear curve?
Answer: Circular shears, vibrating shears.
44: what are the characteristics of vibrating shears?
Answer: vibrating shears can shear the various curves and the inner hole.
45: what is the combined shearing machine tool composed of?
Answer: by inclined mouth scissors, steel shears, small punch composition.
46: try to analyze the drive sequence of the cutting machine.
Answer: the order on the grounds of the original - transmission - workpiece
47: the front plate shears in Longmen has what function?
Answer: mainly play a role in positioning.
48: in Longmen or oblique bed, shear localization which has several forms?
Answer: there are shear plate positioning shear, back plate positioning shear, baffle positioning shear.
49: oblique shear for the material on the shear force can be broken down, why?
Answer: can be divided into shear force, horizontal tension, leaving force.
50: angle bending material length according to what?