LPG Cylinder Handle Forming Molds

Common deformation problems in metal stamping parts are mostly caused by improper matching between the die and process parameters, requiring targeted adjustments. If the workpiece exhibits bending deformation or warping, it is often due to insufficient die clamping force or excessive slide stroke, resulting in uneven stress on the sheet metal. Deformation of drawn parts is often caused by unreasonable drawing clearance and inadequate lubrication. Solutions include first inspecting the die, adjusting the clamping plate pressure, optimizing the drawing clearance, and installing locating pins or clamping rings on easily deformable areas. Simultaneously, depending on the sheet metal thickness and material, reducing the slide speed and increasing the die cutting edge radius can reduce stress concentration during processing, thus preventing deformation from a process-oriented perspective.

Bursts are the most common defect in stamping operations, primarily caused by die edge wear or improper clearance. Over time, the die cutting edge may become dull or chipped, or the clearance between the upper and lower dies during installation may be too large or too small, both leading to burrs on the workpiece edges. Solutions include timely grinding or replacement of the die cutting edge to ensure its sharpness; strict calibration of the die installation clearance, adjusting the clearance value according to the sheet thickness, generally 5%-10% of the sheet thickness. In addition, regular checks of die positioning are necessary to prevent misalignment that could worsen localized burrs. Optimizing raw material materials can also prevent burr problems caused by uneven sheet hardness.

Other common defects include workpiece cracking and wrinkling, requiring multi-dimensional management to eliminate potential problems. Workpiece cracking is often caused by excessive stretching speed and insufficient sheet plasticity; reducing the stretching speed and adding intermediate annealing processes can improve sheet ductility. Wrinkling is caused by insufficient blank holder force or excessively thin sheet material; increasing blank holder force, using raw materials with adequate thickness, and, if necessary, reshaping the die. Establishing a defect traceability mechanism to record the cause and handling measures for each defect, regularly analyzing data, and optimizing dies and processes can reduce recurring quality problems from the source and ensure stable stamped parts quality.