（一）尺寸精度控制，加工前的測量與校準。

（1） Dimensional accuracy control, measurement and calibration before processing.

在開始鈑金機殼加工之前，要對原材料的尺寸進行測量，確保其符合要求。同時，對加工設備如激光切割機、數控沖床、折彎機等進行校準，保證設備的加工精度。例如，數控折彎機的折彎角度校準可以通過試折標準樣板來實現，若偏差超出允許范圍，則需進行調整。

Before starting the sheet metal casing processing, it is necessary to measure the dimensions of the raw materials to ensure that they meet the requirements. At the same time, calibration is carried out on processing equipment such as laser cutting machines, CNC punching machines, bending machines, etc. to ensure the machining accuracy of the equipment. For example, the bending angle calibration of a CNC bending machine can be achieved by bending a standard template. If the deviation exceeds the allowable range, adjustments need to be made.

加工過程中的尺寸監測。在加工過程中，采用量具如卡尺、千分尺、游標萬能角度尺等對關鍵尺寸進行實時監測。對于批量加工的產品，還可以設置抽檢制度，每隔一定數量的產品抽取一件進行全尺寸檢驗，及時發現尺寸偏差并采取糾正措施。

Dimensional monitoring during the processing. During the processing, measuring tools such as calipers, micrometers, and vernier universal angle gauges are used to monitor key dimensions in real-time. For mass-produced products, a sampling system can also be established, where one piece is selected from a certain number of products for full-size inspection to promptly detect dimensional deviations and take corrective measures.

（二）表面質量控制，加工參數優化。

（2） Surface quality control and optimization of processing parameters.

在切割、折彎、焊接等加工過程中，合理調整加工參數以避免表面缺陷。例如，激光切割時，根據材料的種類和厚度調整激光功率、切割速度和輔助氣體壓力，防止出現切口粗糙、掛渣等現象；折彎時，選擇合適的模具和折彎力，避免造成表面劃傷或壓痕。

Reasonably adjust processing parameters during cutting, bending, welding, and other machining processes to avoid surface defects. For example, during laser cutting, adjust the laser power, cutting speed, and auxiliary gas pressure according to the type and thickness of the material to prevent rough cuts, slag hanging, and other phenomena; When bending, choose the appropriate mold and bending force to avoid surface scratches or indentations.

表面處理質量控制，在電鍍和噴涂等表面處理工序中，嚴格控制處理工藝參數。電鍍時要控制好電鍍時間、電流密度等，確保鍍層厚度均勻、結合牢固；噴涂時要保證涂層的厚度適中、均勻，無流掛、氣泡等缺陷。同時，要對表面處理后的成品進行外觀檢查，不合格品要及時返工。

Quality control of surface treatment, strict control of treatment process parameters in surface treatment processes such as electroplating and spraying. During electroplating, it is necessary to control the electroplating time, current density, etc. to ensure uniform coating thickness and firm bonding; When spraying, it is necessary to ensure that the thickness of the coating is moderate, uniform, and free of defects such as sagging and bubbles. At the same time, a visual inspection should be conducted on the finished products after surface treatment, and any non-conforming products should be promptly reworked.

（三）裝配質量檢查，零部件的裝配精度。

（3） Assembly quality inspection, assembly accuracy of components.

在將各個鈑金零部件組裝成機殼時，要保證裝配精度。例如，機箱的面板與箱體之間的間隙要均勻，門的開合要順暢，不能有松動或卡滯現象。這需要在裝配過程中使用合適的工裝夾具，按照規定的順序和方法進行裝配，并對裝配后的整體結構進行檢查。

When assembling various sheet metal components into the casing, it is necessary to ensure assembly accuracy. For example, the gap between the panel of the chassis and the box body should be uniform, and the opening and closing of the door should be smooth without any looseness or jamming. This requires the use of appropriate fixtures during the assembly process, assembly in the prescribed order and method, and inspection of the overall structure after assembly.

功能性測試，對于一些帶有電氣元件或機械傳動部件的機殼，要進行功能性測試。如檢查機箱內部的布線是否整齊合理，有無短路、斷路等問題；對于帶有散熱風扇的機殼，要測試風扇的運轉是否正常，通風散熱是否良好。只有通過各項功能性測試的機殼才能判定為合格產品。

Functional testing is required for some enclosures with electrical components or mechanical transmission parts. Check whether the wiring inside the chassis is neat and reasonable, and whether there are any short circuits, open circuits, or other issues; For enclosures with cooling fans, it is necessary to test whether the fan operates normally and whether the ventilation and heat dissipation are good. Only casings that have passed various functional tests can be judged as qualified products.