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Stamping die maintenance essentials

by:Fortuna     2021-02-11
Stamping die maintenance essentials of mold maintenance purposes at quickly find out the problems and solve them, make the mold back to its original state, to continue production suitable for standard products. The same mould manufacturing the products with the same size and shape, namely each project after processing is complete part or all of the size and shape, so when the products change time, can according to the variation part and find the processing station engineering, and repair to return to, if the determination results for design errors, namely to change the design. Mold maintenance is based on this principle. Below each point will be helpful to the maintenance: first, measurement last type of finished product, checking standard to determine the variation, check the LAYOUT in measuring the project size for the same as the mould figure, size variation or not, when necessary, shall be measured before and after the relevant project to precisely determine the variation of and reasons for, and countermeasures to solve. Second, when itself unable to determine or fail to put forward countermeasures, should consult the opinions of others, please do not arbitrary of itself. Three, wool is too big a head, blade abrasion, regrinding, the gap is too big: b side mostly light, brightness is low, reduce the gap. C, the gap is too small, secondary shear plane increase in clearance. D, involution cut marks: change the joint degree and period of poor or reducing the gap. E, too pointed: products is less than 75 degrees change project or gap. F, the material quality: replace the material or increase the clearance. G, mold collapse: regrinding. H, die bei not: local produce wool or enclosed. Correction or modify the mold again. 4, 1 bit mold, mold loose: mobile or modules than unilateral clearance. Combined gap adjustment. Tilt: 2, die or die straight degree is not straight, or a foreign body between the template and make the template cannot be flat. To group made a correction or grinding. 3, template deformation: template or thickness hardness, deformation or trauma. Replacement of new templates or correct set of execution of work. 4, mold base deformation: the thickness of the mold base or average, guide pin, guide sleeve, straight degree of variation. Grinding correction or replacement or heavy irrigation plastic steel mold base or make stress on average. 5, die interference: or die size and position is correct, the lower die positioning without deviation, set up will loose, punch accuracy, mold is not straight. 6, punching and shearing deflection: don't punch strength, size too close to the punch, lateral force is not balanced, half inclined. Strengthening strip off ramp guide protection or small punch and punch grinding short lt increase with long heel support early lead, pay attention to the feed length. Five, the size variation 1, blade abrasion: feather is too big or bigger size ( Cut shape) ; Smaller ( Punching) ; Flatness is not good. Grinding or replace the die again. 2, no guide: guide pin or other positioning device is not working, feeder did not relax or guide pin diameter, cannot correct guidance. Positioning block wear, long distance. 3, die too short: camber change, don't, forming an incomplete. 4, not escape hole: extrusion or enclosed injury or deformation. Clean up the escape hole or increase the hole and depth. 5, top not: article material, the material of poor bending, stripping and mould puller, lengthen out. 6, ejection: top pin configuration is undeserved, inappropriate or head had long spring force. Adjust the elastic or a change in position or pin number; Short pin mill to cooperate. 7, poor feed: guide plate length not or guide material clearance is too large, or die and feeding machine deflection or die with feeder distance is too long. 8, blanking deformation: can't allow material overlapping part of bending parts, must drop at a time, or available disc strain pressure pad or cut inclined to overcome. 9, bending deformation: WanWanChu on crowded; Uneven deformation and stress distribution near holes pull force bend inclined punch wasn't long enough. 10, punching and shearing deformation: material distortion, size or eccentric asymmetry. 11, impact deformation: products to blow out of the air pressure is too strong or gravity drop impact deformation. 12, floating dust extrusion: waste rise or fines on die surface or foreign bodies such as extrusion variation. 13, improper material: material width or thickness, material or material hardness is not appropriate, also can produce adverse. 14, poorly designed: engineering arrangement is bad, bad gap setting, unless the change design, otherwise difficult to overcome. A: summary of stamping parts
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