Electric Cabinet&Box Sheet Metal Fabrication Procedure
1. Metal Material Cutting process
After receiving the drawing, go to the warehouse to get the material according to the drawing requirements. Before cutting the material without cutting the plate, measure the back and back of the shearing machine with a tape measure. Right, adjust the gap of the plate thickness cutting scissors (the regular gap of the cutting scissors is 1:0.8 of the plate thickness).
When cutting the first piece, check yourself once and measure the length with a tape measure. Width. See whether the burr is in accordance with the requirements of the drawing, and then check each other again to see whether it meets the requirements of the drawing and the process. After meeting the requirements of the drawing, the cutting can continue.
When unloading materials, try to keep the handle gently and put neatly.
When the number of cutting plates is greater than 20 times, self-check in the middle. Check each other. Use a ruler to measure the length. There is no change in width. No changes to meet the requirements of the drawing continue to cut until the end.
At the end of the final inspection, check the length, width, thickness and quantity according to the drawing, after there is no error, the neatly placed material board and drawings are transferred to the next process with a flat cart.
2. CNC machining center processing
After receiving the cut sheet material and design drawing, check whether the drawing and the cut sheet material are consistent with the requirements on the drawing, and then start to select the turret punch mold according to the drawing, and carry out programming processing work.
In the mold of the turret punch, it is necessary to pay attention to the horizontal and vertical of the mold, the handle of the upper mold and the pressure plate of the lower mold must be locked.
After the mold installation is completed, set the backer according to the drawing size, start punching, opening Angle, punch a piece, according to the drawing self-check and mutual check once, confirm no error before continuing processing.
If the thickness of the plate is more than 3.0mm, it cannot be processed by the turret punch, and it must be drilled by the pliers. Mark according to the size of the drawing, make a blanking, select the same drill bit according to the aperture on the drawing, grind it, install it on the bench drill or pistol, and start drilling. When drilling the first piece, check yourself according to the drawing to see if there are burrs in the drilling hole. If there are burrs, remove the drill bit and grind it again until the drilled hole is free of burrs.
If the thickness of the plate is > 3.0mm, it cannot be processed by the turret punching machine, and it must be processed by the ordinary punching machine. When the number of punching, cutting Angle, and drilling is greater than 20 times, it should be self-checked and mutual checked once in the middle. After all punching, opening Angle and drilling, check the size of parts and processing quantity according to the drawing.
After the CNC machining is completed, the flat trolley is placed neatly together with the design drawing to the next process bending process.
3. Sheet Metal Profiles Bending and forming processing
After receiving the incoming materials and design drawings of the previous process, first check whether the drawings and incoming materials are consistent, and then start bending and forming.
The main bending tool is the hydraulic bending machine. According to the thickness, length, width and bending degree of incoming materials and drawings, select the upper/lower molds of different specifications according to the bending control parameter table of the bending machine. When installing the upper/lower die, two people must align the upper/lower die on both sides of the hydraulic press, and then lock the upper/lower die. After installation, take the waste to try the bending depth, Angle to meet the requirements, if not, adjust the upper/lower die.
When bending the first piece of material, it is also necessary to self-check and mutual check once according to the drawing, meet the requirements, and continue bending.
When the number of bending is greater than 20 times, it is necessary to check and mutual check once according to the figure. After all bending is completed, check the drawing again. After self-inspection, mutual inspection and special inspection, they are confirmed to be qualified, and then together with the design drawings, and transferred to the next process.
4. Metal Sheet Profiles Welding processing
After receiving the bent incoming material and design drawing, check whether the drawing matches the incoming material according to the drawing first, and then start welding.
According to the thickness, strength requirements and welding process of incoming materials, select different current welding machines or spot welding machines, and equip different specifications of electrode or oxygen electrode for welding.
When welding, the incoming materials will be placed in the custom or temporary fixture welding a cabinet frame, after taking out the ruler to measure whether the width, height and depth of the cabinet body within the tolerance range, and then measure the top. Whether the bottom reaches the tolerance range. Then check whether the cabinet frame is welded evenly, no leakage welding, no slag inclusion.
After confirming that there are no welding defects, start to weld the skin and knock the slag, and then use the polishing machine to smooth and polish it. After carefully checking the technical requirements according to the requirements of the drawings, the second cabinet can be welded after confirming that it is correct.
After each cabinet is welded, it has to check itself. After all welding is completed, the sheet metal director shall organize the welder to arrange all cabinets in order. Finally, check whether all cabinets are arranged according to the diagram, whether there is inclination of the cabinets, and whether there is welding leakage, slag leakage, grinding and polishing of the overall cabinets.
The welder must pay attention to the welding and position of the usual specifications of the cabinet (grounding screw, door harness support, line bending plate, lock rod support, etc.). If the design drawing is missing, it is necessary to communicate with the designer in time to avoid rework after spraying.
After the welding is completed, all the drawings shall be submitted to the quality inspection department, and the personnel of the quality inspection department shall go to the welding site for acceptance according to the drawings to confirm that there are no obvious welding defects and missing welding parts, and then forward to the next process.
5. Sheet Bending Proflies Surface treatment processing
After acceptance by the quality inspection department, the sheet metal workshop sends the cabinet or parts to the company for spraying. Or supply department sent to the external electroplating, surface treatment process.
Cabinet finished product spraying: This step must be strictly implemented due to professional operating standards control.
According to the requirements of users, the color and powder model of finished products or semi-finished products to be processed shall be determined according to the requirements of the contract;
After the surface treatment is completed and before the assembly workshop receives it, the general acceptance measures are taken to determine the quality. The acceptance project is mainly to count the quantity, check whether the color is consistent with the contract color, and check whether the spraying effect has obvious defects.
Electroplating is external processing, quality inspection personnel to check the overall appearance, found that there are improper handling defects on the board, including uneven spraying, insufficient thickness, temperature, discoloration, bruises, etc., require the external party to rework.
