Technical requirements of the hottest motor

Complete technical requirements for motors

14 The steel strand and other samples must be unloaded and soaked with oil before the assembly of each seal

15. It is allowed to heat the rolling bearing with oil, and the oil temperature shall not exceed 100 ℃

20. After the gear is assembled, the contact spots and backlash on the tooth surface shall comply with the provisions of GB10095 and gb11365

21. It is allowed to use sealing filler or sealant when assembling the hydraulic system, but it shall be prevented from entering the system

22. The parts and components (including purchased parts and outsourced parts) entering the assembly must have the certificate of inspection department before assembly

23. Parts must be cleaned and cleaned before assembly, without burrs, flash, oxide skin, rust, chips, oil stains, colorants, dust, etc

24. Before assembly, recheck the main fitting dimensions of parts and components, especially the interference fitting dimensions and relevant accuracy

25. Parts shall not be knocked, bumped, scratched or rusted during assembly

26. When fastening screws, bolts and nuts, it is forbidden to strike or use inappropriate screwdrivers and wrenches. The screw groove, nut, screw and bolt head shall not be damaged after tightening

27. For fasteners with specified tightening torque requirements, a torque wrench must be used and tightened according to the specified tightening torque

28. When the same part is fastened with multiple screws (bolts), each screw (bolt) shall be tightened crosswise, symmetrically, step by step and evenly

29. The taper pin shall be painted with the hole during assembly, and its contact rate shall not be less than 60% of the fitting length, and shall be evenly distributed

30. The flat key shall be in uniform contact with the two sides of the keyway on the shaft, and there shall be no gap on its mating surface

31. The number of tooth surfaces in contact with the spline assembly at the same time shall not be less than 2/3, and the contact rate shall not be less than 50% in the direction of the length and height of the key teeth

32. After the sliding fit flat key (or spline) is assembled, the relevant accessories can move freely without uneven tightness

33. Excess adhesive shall be removed after bonding

34. The semicircular holes of the bearing outer ring, open bearing seat and bearing cover shall not be stuck

35. The outer ring of the bearing shall be in good contact with the open bearing seat and the semicircular hole of the bearing cover. During color inspection, it shall be in uniform contact with the bearing seat within the range of symmetry to the centerline 120 and the bearing cover within the range of symmetry to the centerline 90. When checking with a feeler gauge within the above range, the 0.03mm feeler gauge shall not be inserted into 1/3 of the outer ring width

36. After assembly, the outer ring of the bearing shall be in uniform contact with the end face of the bearing cover at the positioning end

37. The rolling bearing shall rotate flexibly and stably by hand after installation

38. The joint surfaces of the upper and lower bearing shells shall be closely fitted and checked with a 0.05mm feeler gauge

39. When fixing the bearing bush with the locating pin, the reaming and pin allocation shall be carried out under the condition that the opening and closing surface and end face of the Bush shall be level with the opening and closing surface and end face of the relevant bearing hole. The pin shall not be loose after being driven

40. The bearing body of spherical bearing shall be in uniform contact with the bearing seat, and the contact shall not be less than 70% when checked by coloring method

41. When the surface of alloy bearing liner is yellow, it is not allowed to be used. There shall be no denudation within the specified contact angle. The denudation area outside the contact angle shall not be greater than 10% of the total area of the non-contact area

42. The reference end face of the gear (worm gear) and the shaft shoulder (or the end face of the positioning sleeve) should fit together, and it cannot be checked with a 0.05mm feeler gauge. The perpendicularity between the gear reference end face and the axis shall be ensured

43. The joint surface between the gearbox and the cover shall be in good contact

44. Before assembly, strictly check and remove the sharp corners, burrs and foreign matters left during part processing. Ensure that the seal is not scratched during installation

45. The casting surface shall be free of cold shuts, cracks, shrinkage cavities, penetrating defects and serious incomplete defects (such as under casting, mechanical damage, etc.)

46. The casting shall be cleaned and free of burrs and flash. The pouring and riser on the non machined surface shall be cleaned and flush with the casting surface

47. The cast words and marks on the non machined surface of the casting shall be clear and legible, and the position and font shall meet the requirements of the drawing

48. The roughness of the non machined surface of the casting is not satisfactory when sand casting is carried out, which is not greater than 50 m

49. The casting shall be cleaned of sprue riser, flying thorn, etc. The residual amount of pouring and riser on the non machined surface shall be leveled and polished to meet the surface quality requirements

50. The molding sand, core sand and core bone on the casting shall be removed

51. If the casting has inclined parts, the dimensional tolerance zone shall be symmetrically configured along the inclined plane

52. The molding sand, core sand, core bone, fleshy, sticky sand, etc. on the casting shall be chipped, ground and cleaned

53. Correction shall be made for staggering and boss casting deviation to achieve smooth transition and ensure appearance quality

54. The depth of the folds on the non machined surface of the casting shall be less than 2mm, and the spacing shall be greater than 100mm

55. The non machined surfaces of machine product castings shall be shot blasted or roller treated to meet the requirements of cleanliness SA2 1/2

56. Castings must be water toughened

57. The casting surface shall be flat, and the gate, burr, sand sticking, etc. shall be removed

58. Castings shall be free from cold shuts, cracks, holes and other casting defects detrimental to use

59. Before painting, rust, scale, grease, dust, soil, salt and dirt must be removed from the surface of all steel parts to be painted

60. Before derusting, use organic solvent, alkali liquor, emulsifier, steam, etc. to remove grease and dirt on the surface of steel parts

61. The time interval between the surface to be painted after shot blasting or manual derusting and the primer shall not be more than 6h

62. The surfaces of riveted parts in contact with each other must be coated with anti rust paint with a thickness of 30 ~ 40 m before connection. Lap edges shall be closed with paint, putty or adhesive. The primer damaged due to processing or welding shall be repainted

63. All econcor step-by-step functional features before assembly: the development goal of is to be able to produce organic 3-ply pre-finished parts with integrated continuous fiber reinforced skin. The pipe end flash, burr and chamfer shall be removed. Remove the sundries and floating rust attached to the inner wall of the pipe with compressed air or other methods

64. Before assembly, all steel pipes (including prefabricated pipes) shall be degreased, pickled, neutralized, washed and rustproof

65. During assembly, the pipe clamp, support, flange, joint and other parts fixed by threaded connection shall be tightened to prevent loosening

66. Pressure test shall be carried out on the welded parts of prefabricated pipes

67. When piping is replaced or transferred, the pipe separation port must be sealed with adhesive tape or plastic pipe to prevent any sundries from entering, and labels must be attached

68. The defects must be completely removed before repair welding, and the groove surface shall be flat and smooth without sharp corners

69. According to the defects of steel castings, the defects in the repair welding area can be removed by shovel digging, grinding, carbon arc gouging, gas cutting or machining

70. Sand, oil, water, rust and other dirt within 20mm around the repair welding area and groove must be thoroughly cleaned

71. During the whole process of repair welding, the temperature in the preheating zone of steel castings shall not be lower than 350 C