1: What are the main forms of metal structures?
Answer: There are frame structure, container structure, box structure and general component structure.
2: Riveting operation can be divided into several parts according to the nature of the process?
A: It is divided into preparation, stakeout, processing and assembly.
3: What are the connection methods for metal structures?
Answer: There are riveting, welding, rivet welding, and bolting.
4: Riveting in the mechanical manufacturing industry belongs to (thermal processing).
5: What is hot processing?
Answer: All or part of the metal material is heated and formed.
9: What is the structure of the truss structure?
A: The profile is the main body.
7: What is the structure of the container structure?
A: It is based on plates.
8: The box structure and the general structure are structures manufactured by mixing (sheet) and (profile).
9: Preparation refers to the preparation of (raw materials) and (part blanks).
10: Steel plates and profiles can be deformed during transportation (suspension, storage, storage).
11: The deformation of the steel will affect the normal operation of the parts (lifting, cutting, gas cutting).
12: If the deformation of the part during processing is not corrected, it will affect the structure (correct assembly).
13: Deformation caused by welding will reduce the assembly (accuracy), causing additional stress inside the steel structure, affecting (strength of the member).
14: The deformation of flat steel has (bending, twisting, bending and twisting composite deformation).
15: What kind of multi-roller straightening machine can be divided according to the arrangement of the shaft roller and the position of the adjusting roller?
A: It can be divided into upper and lower roller column parallel straightening machine and upper and lower roller tilt straightening machine.
16: What are the heating methods for flame correction?
A: It is a bit shaped, linear, and triangular.
17: What is the effect of the flame correction?
A: It is determined by the heating position and heating temperature.
18: What are the correction methods?
A: Mechanical correction, manual correction, flame correction, high frequency heat hinge.
19: What is the first process of making metal structures?
A: Stakeout and numbering are the first steps in making metal structures.
20: What are the effects of stakeout and material on the product? A: It will directly affect the quality of the product and have a direct impact on the production cycle and cost.
21: What is the usual amount of stakeout?
A: There are wooden folding rulers, rulers, steel tape measures, steel rulers and so on.
22: What are the commonly used tools for stakeout?
A: There are rules, ground rules, sample punches, needles, and small hand hammers.
23: What is the procedure for the real-scale stakeout?
A: The program is a line type stakeout, a structure stakeout, and an open sample.
24: What is the content of the exhibition open sample?
A: There are plate thickness processing, unfolding drawings, and making sample materials.
25: What kinds of samples are classified according to their use?
A: There are sample materials, inspection samples, and positioning templates.
26: What materials are generally used to make samples?
A: Use a thin iron sheet with a thickness of 0.5-2 mm.
27: What are the main methods of drawing and sample rods?
A: There are straight line drawing methods and transitional drawing methods.
28: How to make reasonable materials?
A: It is necessary to concentrate on the use of spares and surplus materials.
29: Which kinds of curves are there?
A: It is divided into plane curve and space curve.
30: What are the methods for finding the length of a straight line segment?
A: There are rotation method, right triangle method, branch line method, and face changing method.
31: What are the steps to open the exhibition?
A: It is through the geometric drawing to draw the intersecting line, the solid long line, the solid shape and then make the unfolded picture.
32: What is the basic method for finding a plane intersection line?
A: The ridge method and the facet method.
33: What is the basic method of finding a curved intersection line?
A: It is the warp method and the weft method.
34: What is the main method for finding the intersection line?
A: It is the auxiliary plane method, the plain line method, and the spherical method.
35: What are the characteristics of the intersecting line?
Answer: (1) The intersecting line is the common line and dividing line of the intersecting two shapes. (2) Since the shape has a certain range, the intersecting line is always closed.
36: What is the intercept line?
A: The intersection of the section plane and the solid surface.
37: What is the prime line?
A: Any position on the surface of the component is called the prime line.
38: What are the common deployment methods?
A: There are parallel line method, radiation method, and triangle method.
39: What is the usual way of dividing the sphere?
A: There are banding method, block method, and split method.
40: What is the main content of the plate thickness processing?
A: Determine the neutral layer of the curved piece and eliminate the plate thickness interference.
41: What is the material length of the angled steel bending piece?
A: Calculated by the center of gravity.
42: What kinds of shears are there for cutting straight lines?
A: There are gantry oblique shearing machines, cross-beam oblique shearing machines, and combined punching and shearing machines.
43: What kinds of machine tools do you want to cut the curve?
A: There are disc shears and vibratory shears.
44: What are the characteristics of the vibration shearing machine?
A: Vibration shears can cut a variety of curves and bores.
45: What constitutes a joint shearing machine?
Answer: It consists of oblique cut, steel cut and small punch.
46: Try to analyze the transmission sequence of the shearing machine.
A: The order is from the original moving parts - the transmission parts - the workpiece
47: What is the function of the front and rear baffles of the gantry shears?
A: It mainly plays a role in positioning.
48: In the gantry or oblique mouth shearing bed, what are the forms of positioning shear?
Answer: There are shear plate positioning shearing, tailgate positioning shearing, and baffle positioning shearing.
49: What is the shearing force of the oblique shear on the material?
A: It can be divided into shear force, horizontal tension and exit force.
50: What is the material length of the angled steel bending piece?
A: Calculated by the center of gravity.
51: What material is not suitable for cutting machinery?
A: Not suitable for cutting alloy materials and quenched materials.
52: How to choose the cutting oxygen pressure?
A: It should be selected according to the thickness of the workpiece, the diameter of the torch tip, and the purity of oxygen.
53: What is the ignition point of general carbon steel in oxygen?
A: About 1100--1150°c
54: What are the metal materials that can meet the gas cutting conditions?
A: There are pure iron, low carbon steel, medium carbon steel, ordinary low alloy steel.
55: What is the process of gas cutting?
Answer: It is the preheating of metal, the burning of metal, and the blowing of oxides.
56: What is the role of the circular die? What is the composition?
A: It is a tool for machining external threads, which consists of a cutting part, a positioning part, and a chip removal hole.
57: What is the form of the opening groove?
A: The type and thickness of the material, the welding method, and the mechanical properties of the product.
58: What is a scrub?
A: The machining of the surface of the workpiece with a grinding wheel is called sanding.
59: What are the main types of grinding tools?
A: There are pneumatic grinders and electric grinders.
60: What is the deformation of the steel during the bending process?
A: Elastic deformation and plastic deformation will occur.
61: What are the common bending methods used by riveters?
A: There are cold bends, hot bends, manual bends, and mechanical bends.
62: What are the forms of bending and deformation of materials during press forming?
Answer; there are free bending, contact bending, and correcting bending.
63: What is the change in the cross-sectional shape of the material during the bending process?
A: It is related to the relative bending radius, cross-section geometry and bending mode.
64: What is the method to prevent the blank offset during the bending process?
A: There are feeding devices and positioning holes.
65: What kinds of rolling machine tools are included?
A: Including the roller machine and the steel bending machine.
66: What are the main processes of manual bending?
A: There are scribe lines, sand filling, and heating and bending.
67: What are the connection methods for metal structures?
A: There are three types of rivet joints and threaded joints.
68: What should I consider when choosing a connection method?
A: Consider the strength of the components, working environment, materials, construction conditions and other factors.
69: What are the forms of riveted joints?
A: There are docking and corner joints.
70: What are the forms of solid rivet heads?
A: There are semi-circular heads, countersunk heads, and semi-sunk heads.
71: What are the main types of AC arc welding machines?
A: There are BX1--330 and BX--500.
72: What is the basic operation process of hot riveting?
Answer: It is fastened by riveting parts, hole repairing, rivet heating, nailing and nailing, top nailing and riveting.
73: What kinds of riveting types are there?
A: There are strong riveting, tight riveting and tight riveting.
74: What are the tools for hole repair?
A: There are reamer.
75: What are the common anti-loose measures for threaded joints?
A: There is increased friction and mechanical anti-loose.
76: What constitutes the welding arc?
Answer: It consists of anode area, cathode area and arc column.
77: What are the main types of welding machines?
A: There are DC welders and AC welders.
78: What is local deformation? What are included?
Answer: Refers to the deformation of a part of the component, including angular deformation, wave deformation, and local unevenness.
79: Which kinds of welding are divided by space?
Answer: Split welding, vertical welding, horizontal welding, and overhead welding.
90: What are the three directions of movement of the welding rod during the welding process?
Answer: It moves in the direction of the molten pool, moves in the welding direction, and oscillates in the lateral direction.
91: What are the three elements of assembly?
A: It is positioning, support and clamping.
92: What are the manual clips?
A: There are screw clamps, wedge clamps, lever clamps, and eccentric clamps.
93: What are the non-manual clips?
A: There are pneumatic clamps, hydraulic clamps and magnetic clamps.
94: What function does the screw clamp have?
A: It has the functions of clamping, pressing, topping and supporting.
95: What are the commonly used measurement items in the assembly?
A: There are linear size, parallelism, verticality, coaxiality, and angle.
96: What is the form of support for the workpiece in the assembly?
Answer: There is assembly platform support and assembly of the tire frame support.
97: What kind of components can be assembled according to their functions?
A: It can be divided into a universal tire carrier and a special tire carrier.
98: What are the common positioning methods used in assembly?
A: There are line positioning, template positioning, positioning component positioning.
99: What are the basic methods for finding a plane intersection line?
A: There are facet method and ridge method.
100: Hot rivet is generally composed of four people. What is their division of labor?
A: One person heats and transfers, one nails nails, one nails, and one person rives.
Answer: There are frame structure, container structure, box structure and general component structure.
2: Riveting operation can be divided into several parts according to the nature of the process?
A: It is divided into preparation, stakeout, processing and assembly.
3: What are the connection methods for metal structures?
Answer: There are riveting, welding, rivet welding, and bolting.
4: Riveting in the mechanical manufacturing industry belongs to (thermal processing).
5: What is hot processing?
Answer: All or part of the metal material is heated and formed.
9: What is the structure of the truss structure?
A: The profile is the main body.
7: What is the structure of the container structure?
A: It is based on plates.
8: The box structure and the general structure are structures manufactured by mixing (sheet) and (profile).
9: Preparation refers to the preparation of (raw materials) and (part blanks).
10: Steel plates and profiles can be deformed during transportation (suspension, storage, storage).
11: The deformation of the steel will affect the normal operation of the parts (lifting, cutting, gas cutting).
12: If the deformation of the part during processing is not corrected, it will affect the structure (correct assembly).
13: Deformation caused by welding will reduce the assembly (accuracy), causing additional stress inside the steel structure, affecting (strength of the member).
14: The deformation of flat steel has (bending, twisting, bending and twisting composite deformation).
15: What kind of multi-roller straightening machine can be divided according to the arrangement of the shaft roller and the position of the adjusting roller?
A: It can be divided into upper and lower roller column parallel straightening machine and upper and lower roller tilt straightening machine.
16: What are the heating methods for flame correction?
A: It is a bit shaped, linear, and triangular.
17: What is the effect of the flame correction?
A: It is determined by the heating position and heating temperature.
18: What are the correction methods?
A: Mechanical correction, manual correction, flame correction, high frequency heat hinge.
19: What is the first process of making metal structures?
A: Stakeout and numbering are the first steps in making metal structures.
20: What are the effects of stakeout and material on the product? A: It will directly affect the quality of the product and have a direct impact on the production cycle and cost.
21: What is the usual amount of stakeout?
A: There are wooden folding rulers, rulers, steel tape measures, steel rulers and so on.
22: What are the commonly used tools for stakeout?
A: There are rules, ground rules, sample punches, needles, and small hand hammers.
23: What is the procedure for the real-scale stakeout?
A: The program is a line type stakeout, a structure stakeout, and an open sample.
24: What is the content of the exhibition open sample?
A: There are plate thickness processing, unfolding drawings, and making sample materials.
25: What kinds of samples are classified according to their use?
A: There are sample materials, inspection samples, and positioning templates.
26: What materials are generally used to make samples?
A: Use a thin iron sheet with a thickness of 0.5-2 mm.
27: What are the main methods of drawing and sample rods?
A: There are straight line drawing methods and transitional drawing methods.
28: How to make reasonable materials?
A: It is necessary to concentrate on the use of spares and surplus materials.
29: Which kinds of curves are there?
A: It is divided into plane curve and space curve.
30: What are the methods for finding the length of a straight line segment?
A: There are rotation method, right triangle method, branch line method, and face changing method.
31: What are the steps to open the exhibition?
A: It is through the geometric drawing to draw the intersecting line, the solid long line, the solid shape and then make the unfolded picture.
32: What is the basic method for finding a plane intersection line?
A: The ridge method and the facet method.
33: What is the basic method of finding a curved intersection line?
A: It is the warp method and the weft method.
34: What is the main method for finding the intersection line?
A: It is the auxiliary plane method, the plain line method, and the spherical method.
35: What are the characteristics of the intersecting line?
Answer: (1) The intersecting line is the common line and dividing line of the intersecting two shapes. (2) Since the shape has a certain range, the intersecting line is always closed.
36: What is the intercept line?
A: The intersection of the section plane and the solid surface.
37: What is the prime line?
A: Any position on the surface of the component is called the prime line.
38: What are the common deployment methods?
A: There are parallel line method, radiation method, and triangle method.
39: What is the usual way of dividing the sphere?
A: There are banding method, block method, and split method.
40: What is the main content of the plate thickness processing?
A: Determine the neutral layer of the curved piece and eliminate the plate thickness interference.
41: What is the material length of the angled steel bending piece?
A: Calculated by the center of gravity.
42: What kinds of shears are there for cutting straight lines?
A: There are gantry oblique shearing machines, cross-beam oblique shearing machines, and combined punching and shearing machines.
43: What kinds of machine tools do you want to cut the curve?
A: There are disc shears and vibratory shears.
44: What are the characteristics of the vibration shearing machine?
A: Vibration shears can cut a variety of curves and bores.
45: What constitutes a joint shearing machine?
Answer: It consists of oblique cut, steel cut and small punch.
46: Try to analyze the transmission sequence of the shearing machine.
A: The order is from the original moving parts - the transmission parts - the workpiece
47: What is the function of the front and rear baffles of the gantry shears?
A: It mainly plays a role in positioning.
48: In the gantry or oblique mouth shearing bed, what are the forms of positioning shear?
Answer: There are shear plate positioning shearing, tailgate positioning shearing, and baffle positioning shearing.
49: What is the shearing force of the oblique shear on the material?
A: It can be divided into shear force, horizontal tension and exit force.
50: What is the material length of the angled steel bending piece?
A: Calculated by the center of gravity.
51: What material is not suitable for cutting machinery?
A: Not suitable for cutting alloy materials and quenched materials.
52: How to choose the cutting oxygen pressure?
A: It should be selected according to the thickness of the workpiece, the diameter of the torch tip, and the purity of oxygen.
53: What is the ignition point of general carbon steel in oxygen?
A: About 1100--1150°c
54: What are the metal materials that can meet the gas cutting conditions?
A: There are pure iron, low carbon steel, medium carbon steel, ordinary low alloy steel.
55: What is the process of gas cutting?
Answer: It is the preheating of metal, the burning of metal, and the blowing of oxides.
56: What is the role of the circular die? What is the composition?
A: It is a tool for machining external threads, which consists of a cutting part, a positioning part, and a chip removal hole.
57: What is the form of the opening groove?
A: The type and thickness of the material, the welding method, and the mechanical properties of the product.
58: What is a scrub?
A: The machining of the surface of the workpiece with a grinding wheel is called sanding.
59: What are the main types of grinding tools?
A: There are pneumatic grinders and electric grinders.
60: What is the deformation of the steel during the bending process?
A: Elastic deformation and plastic deformation will occur.
61: What are the common bending methods used by riveters?
A: There are cold bends, hot bends, manual bends, and mechanical bends.
62: What are the forms of bending and deformation of materials during press forming?
Answer; there are free bending, contact bending, and correcting bending.
63: What is the change in the cross-sectional shape of the material during the bending process?
A: It is related to the relative bending radius, cross-section geometry and bending mode.
64: What is the method to prevent the blank offset during the bending process?
A: There are feeding devices and positioning holes.
65: What kinds of rolling machine tools are included?
A: Including the roller machine and the steel bending machine.
66: What are the main processes of manual bending?
A: There are scribe lines, sand filling, and heating and bending.
67: What are the connection methods for metal structures?
A: There are three types of rivet joints and threaded joints.
68: What should I consider when choosing a connection method?
A: Consider the strength of the components, working environment, materials, construction conditions and other factors.
69: What are the forms of riveted joints?
A: There are docking and corner joints.
70: What are the forms of solid rivet heads?
A: There are semi-circular heads, countersunk heads, and semi-sunk heads.
71: What are the main types of AC arc welding machines?
A: There are BX1--330 and BX--500.
72: What is the basic operation process of hot riveting?
Answer: It is fastened by riveting parts, hole repairing, rivet heating, nailing and nailing, top nailing and riveting.
73: What kinds of riveting types are there?
A: There are strong riveting, tight riveting and tight riveting.
74: What are the tools for hole repair?
A: There are reamer.
75: What are the common anti-loose measures for threaded joints?
A: There is increased friction and mechanical anti-loose.
76: What constitutes the welding arc?
Answer: It consists of anode area, cathode area and arc column.
77: What are the main types of welding machines?
A: There are DC welders and AC welders.
78: What is local deformation? What are included?
Answer: Refers to the deformation of a part of the component, including angular deformation, wave deformation, and local unevenness.
79: Which kinds of welding are divided by space?
Answer: Split welding, vertical welding, horizontal welding, and overhead welding.
90: What are the three directions of movement of the welding rod during the welding process?
Answer: It moves in the direction of the molten pool, moves in the welding direction, and oscillates in the lateral direction.
91: What are the three elements of assembly?
A: It is positioning, support and clamping.
92: What are the manual clips?
A: There are screw clamps, wedge clamps, lever clamps, and eccentric clamps.
93: What are the non-manual clips?
A: There are pneumatic clamps, hydraulic clamps and magnetic clamps.
94: What function does the screw clamp have?
A: It has the functions of clamping, pressing, topping and supporting.
95: What are the commonly used measurement items in the assembly?
A: There are linear size, parallelism, verticality, coaxiality, and angle.
96: What is the form of support for the workpiece in the assembly?
Answer: There is assembly platform support and assembly of the tire frame support.
97: What kind of components can be assembled according to their functions?
A: It can be divided into a universal tire carrier and a special tire carrier.
98: What are the common positioning methods used in assembly?
A: There are line positioning, template positioning, positioning component positioning.
99: What are the basic methods for finding a plane intersection line?
A: There are facet method and ridge method.
100: Hot rivet is generally composed of four people. What is their division of labor?
A: One person heats and transfers, one nails nails, one nails, and one person rives.
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