CNC Knowledge: German assembly technology, with technical requirements for installation and distribution

[Exigences techniques pour l’assemblage]

1. Basic requirements

• Architecture must comply with design, process requirements, and these relevant regulations and standards.
• The assembly environment must be cleaned. The environmental temperature of assembly, humidity, prevention of dust and high provision of products must comply with relevant regulations.
• All documents (including outsourcing and foreign cooperation) must have the certificate qualified as an inspection to be assembled.
• The parts should be cleaned and cleaned before assembly.
• During the assembly process, the parts should not bang, scratch and rust.
• Parts unattended should not be assembled.
• Compared to the parts of movement, the contact surface should be added with the lubrication oil (fat) during assembly.
• The relative positions of each zero and components must be precise.
• In principle, it is not allowed to walk on the plane during assembly.

2. Requirements for the connection method2.1 Connecting the screws and bolt

• When the screws, bolts and nuts are fixed, it is strictly prohibited to fight or use rotors and inappropriate panels.
• The fixing required by the tightening torque must be tightened by tightening the tightening torque in accordance with the regulations. The tightening torque bolt is not specified, and its tightening torque may refer to the provisions of Annex I.
• When the same room is tight with several screws or bolts, each screw (bolt) must be tight gradually clockwise, intertwined and symmetrical.
• When you use a double nut, you must first install a thin nut and install a thick nut.
• Once the screws, bolts and tight nuts, the screw and the bolt must generally expose 1 at 2 screw distances.
• Once the screws, bolts and nuts tight, the support surface must be equipped with fixing parts.
  

2.2 Sales connection

• The final surface of positioning and sale must generally be slightly higher than the surface of the parts.
• Once the opening sold in the relevant rooms, the tail must be separated from 60 ° 1.90 °.
• The important cone must be carried out with a coloring inspection with the hole.

2.3 Key connection

• The flat keys should be contacted evenly on both sides of the key slit of the fixed key, and there should be no difference between the coordination of the surface.
• Once the binding (or the wrench of flowers) is assembled, the relative movement parts should not be elastic during the trip along the axial movement.
• Once the head and the hook key are assembled, the contact zone must not be less than 70% of the work area and the part of the non-contact should not be concentrated in a single place; at 15% of the length of the slope.

2.4 Rivetage

• Rive materials and specifications must meet the design requirements. The treatment of rivet holes must meet relevant standards.
• During the riveting, the surface of the riveted parts should not be destroyed or the surface of the riveted parts should not be deformed.
• With the exception of special requirements, the phenomenon of relaxation should not occur after riveter.

2.5 rolling roller rollers

• The bearing must be clean before assembly.
• For oil lubrication bearings, approximately a half of the empty cavity should be injected after assembly to respect the prescribed fat.
• When the assembly is used in the method, the special pressure tool is applied or matching with a stick or adjusted on the over-implant ring, and it is not allowed to pass the pressure or to strike through rolling body and maintain the shelf.
• The final surface of the inner bearing ring must generally be close to the shoulder of the tree.
• Once the exterior ring of the bearing is assembled, the lid of contact ends and the outer ring must be uniform.
• When assembling removable bearings, it must be installed depending on the inner and exterior ring and the bearing, and should not be installed or mixed with other interior and exterior circles.
• The turnover that can be raised and assembled must be outward at the end of the number to be identified.
• The bearing with a rolling cover must be consistent with the direction of rotation of the tree in the direction of tightening the eccentric cover.
• Once the rolling bearing has been installed, the rotation of the parts compared to the movement parts must be flexible and light, and there should not be stagnation. So, then
• Rollers with cone rolls with a single column, contact bearing at angle corner, two -way thrust sphere must meet the drawings and treatment requirements during assembly.
• The semi-circular holes of the outer ring of the bearing and the opening of the bearing and rolling cover must be well exposed. 90 ° range, contact evenly. In the beach above, a third of the width of the outside ring must be filled with 0.03 mm medication.
• There is an adjustable directional turnover on both sides of the axis, and the axial displacement is limited to the end of the two ends. Axis Central distance (mm) α: the expansion coefficient of the material line △ t: the difference between the maximum operating temperature of the axis and the ambient temperature (℃) 0.15: the remaining space (mm ) After the thermal remedy of the tree (mm)

3. Architecture of the gable chain

• Cooperation between the gable and the tree must meet the design requirements.
• The active gable must be reorganized with the geometry plan of the wheel tooth of the rotor of the mobilization chain, and its discrepancy must not exceed the design requirements. If the design is not stipulated, it must generally be less than or equal to two thousandths of the central distance to two wheels.
• When the chain is meson with the gable, the work must be tightened and assured that the network is stable.
• The falling degree of the chain should meet the design requirements. If the design is not stipulated, it must be adjusted to 1% to 2% of the center of the two gables.

4. Walked out with wheels with wheels

• The position of the central surface of the failed wheel groove in the same circuit is: the central spacing is less than 1.2 m to 0.3% in the center of the belt; at 1.2 m.
• The tension of each transmission belt must meet the requirements of the Futian system inspection card “Valley God 2”.

5. Hydraulic system equipment

• The pipeline of the hydraulic system must be removed and cleaned before assembly.
• Various tubes should not have dental, wrinkles, flattenings and rupture.
• The layout of pipelines must be treated and facilitated to adjust and repair the hydraulic system.
• The hydraulic oil that has injected the hydraulic system must meet the design and process requirements.
• After assembly, the hydraulic pipe and the components should not have an oil leak.
• The hydraulic manipulation system and the steering system must be flexible and stagnated.
• Once the hydraulic system has been installed, the operating test must be carried out in accordance with relevant standards.
• Other requirements for hydraulic systems and hydraulic elements must comply with GB / T3766 regulations.

6. Equipment for electrical systems

• The electrical components must be tested and verified before assembly, and those which are not qualified cannot be assembled.
• The digital and the signals displayed by the instrument and the index must be clear and precise, and the switching is reliable.
• Circulation and connection must be made strictly in accordance with the requirements of electrical assembly models.
• The insulation layer of all the wires must be intact and the fine copper wire on the wire must be tight and tiny.
• The welding joints should be firm and should not be welded or welded virtual. The welding joints must be smooth and uniform.

7.
7.1 Taste, transmission and speed without step exceeding 400R / min, and a strap wheel with a weight of more than 5 kg must be carried out on a static or dynamic balance test, and the accuracy of the balance must not be less than G6.3.
7.2 Correct the quality of the imbalance of rotary parts can be used as the following method:

• Use the quality (weight) of additional welding and the connection of the thread.
• Use the borehole to eliminate quality (heavy).
• Change the number and location of the balance block.

7.3 When correction with the quality mixing method, it is necessary to be fixed to prevent relaxation or theft during the work.7.4 When you correct the quality method, be sure not to affect the rigidity, resistance and appearance of the part.7.5 For the combined rotation body, after global balance, it is no longer possible to move or modify the parts.

8. Each regulatory agency must ensure that the operation is practical and flexible and reliable. The regulation range of each component must reach the specified limit position.
9. Each manipulation agency must ensure that the operation is light and flexible, and that the seal is moderate. All the control required for automatic return must be automatically returned to the original position after the manipulation deletion.

10. Complete
During the assembly, the random fixation must also be tested and the design requirements must be guaranteed.The floor clearance must be consistent with a rigid cut and its difference is not greater than 15 mm.The on foot braking devices and the parking braking devices should guarantee that the parking machine is reliable.The start of the engine must be smooth and stable, and the flames are completely reliable;All signs of the machine must be glued to the site specified according to design requirements and must not be biased or unequal.The test machine must ensure that the host has more than 2 hours before leaving the factory.