Haeufig verwendete Techniken und Vorsichtsmassnahmen fuer bearbeitete Teile
In mechanical parts, what are the technical requirements that need to be observed? Only by complying with these technical requirements can the finished products of machining be more standardized and reasonable. The specific technical requirements are as follows:
(1) The parts are descaled.
(2) processing the part surface, there should be no damage to parts of the surface defects scratches, abrasions and the like.
(3) Unmarked shape tolerance shall comply with the requirements of GB1184-80, and the allowable deviation of length dimension shall be ±0.5mm.
(4) The tolerance of the casting is symmetric with respect to the basic size configuration of the blank casting.
(5) The assembly of rolling bearings allows for hot charging with oil heating. The temperature of the oil must not exceed 100 °C.
(6) Sealing packing or sealant is allowed when assembling the hydraulic system, but should be prevented from entering the system.
(7) Parts that enter the assembly must have the qualification of the inspection parts before assembly.
(8) Parts must be cleaned and cleaned before assembly, without burrs, flash, scale, rust, chips, oil, colorants and dust.
(9) Before assembly, the main matching dimensions of the parts and components, especially the interference fit size and related accuracy, should be reviewed.
(10) Parts are not allowed to be scratched, bumped, scratched or rusted during assembly.
(11) When tightening screws, bolts and nuts, it is strictly forbidden to strike or use improper screwdrivers and wrenches. The screw groove, nut and screw, and the head of the bolt must not be damaged after tightening.
(12) Fasteners for tightening torque requirements must be torque wrenches and tightened to the specified tightening torque.
(13) Excess adhesive should be removed after bonding.
(14) The outer ring of the bearing and the semi-circular hole of the open bearing seat and the bearing cap are not allowed to jam; The outer ring of the bearing should be in good contact with the semi-circular hole of the open bearing housing and the bearing cap. When coloring inspection, it should be evenly contacted with the bearing seat in a range of 120° from the center line and 90° from the bearing cover in the symmetry of the center line. When using a feeler gauge within the above range, a 0.03 mm feeler gauge shall not be inserted into 1/3 of the width of the outer ring.
(15) After the outer ring of the bearing is assembled, it should be evenly contacted with the end face of the bearing end of the positioning end.
(16) The rolling bearing should be flexible and stable after being installed by hand.
(17) The joint surface of the upper and lower bearing bushes should be closely attached and inspected with a 0.05 mm feeler gauge.
(18) When fixing the bearing bush with the positioning pin, the hinge and the pin should be drilled while ensuring that the opening and closing faces of the mouth and the end face are flush with the end of the relevant bearing hole. Do not loosen after the pin is inserted.
(19) When the surface of the alloy bearing lining is yellow, it is not allowed to be used. The nuclear separation phenomenon is not allowed within the specified contact angle, and the area of the nuclear separation outside the contact angle shall not be greater than 10% of the total area of the non-contact area.
(20) The reference end face of the gear (worm gear) and the shoulder (or the end face of the positioning sleeve) should be fitted together and inspected with a 0.05 mm feeler gauge. The verticality requirement of the gear reference end face and the axis should be ensured.
(21) Strictly inspect and remove sharp corners, burrs and foreign objects remaining during part processing before assembly. Ensure that the seal is not scratched when it is installed.
(22) Cold insulation, cracks, shrinkage cavities and penetrating defects and severe defect defects are not allowed on the surface of castings.
(23) Castings should be cleaned and free of burrs and flashing. Non-machining indicates that the riser should be cleaned and flush with the surface of the casting.
(24) Castings and markings on non-machined surfaces of castings shall be legible and the position and typeface shall conform to the requirements of the drawings.
(25) Castings should be removed from pouring risers, flying thorns, etc. The residual amount of the riser on the non-machined surface should be leveled and polished to meet the surface quality requirements.
(26) The molding sand, core sand and core bone on the casting should be removed.
(27) The casting has a slanted part, and its dimensional tolerance zone shall be symmetrically arranged along the inclined surface.
(28) The right and wrong type, the boss casting, etc. should be corrected to achieve a smooth transition and ensure the appearance quality.
(29) Non-machined surfaces of machine product castings require shot peening or drum treatment to achieve a cleanliness Sa2 1/2 level.
(30) The surface of the casting should be flat, and the gate, burr, and sand should be removed.
(31) Castings are not allowed to have casting defects such as cold partitions, cracks, holes, etc. that are detrimental to use.
(32) All steel parts that need to be painted must be removed from rust, scale, grease, dust, dirt, salt and dirt before painting.
(1) The parts are descaled.
(2) processing the part surface, there should be no damage to parts of the surface defects scratches, abrasions and the like.
(3) Unmarked shape tolerance shall comply with the requirements of GB1184-80, and the allowable deviation of length dimension shall be ±0.5mm.
(4) The tolerance of the casting is symmetric with respect to the basic size configuration of the blank casting.
(5) The assembly of rolling bearings allows for hot charging with oil heating. The temperature of the oil must not exceed 100 °C.
(6) Sealing packing or sealant is allowed when assembling the hydraulic system, but should be prevented from entering the system.
(7) Parts that enter the assembly must have the qualification of the inspection parts before assembly.
(8) Parts must be cleaned and cleaned before assembly, without burrs, flash, scale, rust, chips, oil, colorants and dust.
(9) Before assembly, the main matching dimensions of the parts and components, especially the interference fit size and related accuracy, should be reviewed.
(10) Parts are not allowed to be scratched, bumped, scratched or rusted during assembly.
(11) When tightening screws, bolts and nuts, it is strictly forbidden to strike or use improper screwdrivers and wrenches. The screw groove, nut and screw, and the head of the bolt must not be damaged after tightening.
(12) Fasteners for tightening torque requirements must be torque wrenches and tightened to the specified tightening torque.
(13) Excess adhesive should be removed after bonding.
(14) The outer ring of the bearing and the semi-circular hole of the open bearing seat and the bearing cap are not allowed to jam; The outer ring of the bearing should be in good contact with the semi-circular hole of the open bearing housing and the bearing cap. When coloring inspection, it should be evenly contacted with the bearing seat in a range of 120° from the center line and 90° from the bearing cover in the symmetry of the center line. When using a feeler gauge within the above range, a 0.03 mm feeler gauge shall not be inserted into 1/3 of the width of the outer ring.
(15) After the outer ring of the bearing is assembled, it should be evenly contacted with the end face of the bearing end of the positioning end.
(16) The rolling bearing should be flexible and stable after being installed by hand.
(17) The joint surface of the upper and lower bearing bushes should be closely attached and inspected with a 0.05 mm feeler gauge.
(18) When fixing the bearing bush with the positioning pin, the hinge and the pin should be drilled while ensuring that the opening and closing faces of the mouth and the end face are flush with the end of the relevant bearing hole. Do not loosen after the pin is inserted.
(19) When the surface of the alloy bearing lining is yellow, it is not allowed to be used. The nuclear separation phenomenon is not allowed within the specified contact angle, and the area of the nuclear separation outside the contact angle shall not be greater than 10% of the total area of the non-contact area.
(20) The reference end face of the gear (worm gear) and the shoulder (or the end face of the positioning sleeve) should be fitted together and inspected with a 0.05 mm feeler gauge. The verticality requirement of the gear reference end face and the axis should be ensured.
(21) Strictly inspect and remove sharp corners, burrs and foreign objects remaining during part processing before assembly. Ensure that the seal is not scratched when it is installed.
(22) Cold insulation, cracks, shrinkage cavities and penetrating defects and severe defect defects are not allowed on the surface of castings.
(23) Castings should be cleaned and free of burrs and flashing. Non-machining indicates that the riser should be cleaned and flush with the surface of the casting.
(24) Castings and markings on non-machined surfaces of castings shall be legible and the position and typeface shall conform to the requirements of the drawings.
(25) Castings should be removed from pouring risers, flying thorns, etc. The residual amount of the riser on the non-machined surface should be leveled and polished to meet the surface quality requirements.
(26) The molding sand, core sand and core bone on the casting should be removed.
(27) The casting has a slanted part, and its dimensional tolerance zone shall be symmetrically arranged along the inclined surface.
(28) The right and wrong type, the boss casting, etc. should be corrected to achieve a smooth transition and ensure the appearance quality.
(29) Non-machined surfaces of machine product castings require shot peening or drum treatment to achieve a cleanliness Sa2 1/2 level.
(30) The surface of the casting should be flat, and the gate, burr, and sand should be removed.
(31) Castings are not allowed to have casting defects such as cold partitions, cracks, holes, etc. that are detrimental to use.
(32) All steel parts that need to be painted must be removed from rust, scale, grease, dust, dirt, salt and dirt before painting.
