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 News Center |
| The structural safety of stamping die |
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Publisher：kgchina
Published：2011-05-04 READ：208Time |
Stamping stamping die is the main process equipment, stamping rely on the relative motion under the mold to complete. Processing the upper and lower mold continuously between the division and, if the operation of the fingers of workers continue to enter the closed area or remain in the mold, it will pose a serious threat to their personal safety.
(A) of the mold main parts, the role and safety requirements
1. Working parts is a direct punch to shape the work of the billet parts, therefore, it is the key to mold parts. Punch and die not only sophisticated and complex, it should meet the following requirements: (1) should have sufficient strength, can not be broken or destroyed during stamping; (2) on the material and heat treatment requirements should be appropriate to prevent high hardness and brittle crack.
2. Positioning part positioning parts are installed to determine the location of the part blank, there are pins (board), gauge pin (plate), derivative is sold, guide plate, set away from the side of the blade, lateral pressure, etc.. Design orientation should be considered part and convenient operation, should not have been positioned to facilitate the observation position, preferably before the push position, orientation and guidance is outside the profile marketing positioning.
3. Press materials, unloading and discharging parts binder components are blank holder, pressure plate and so on.
Blank holder pressure can drawing blank holder force, to prevent billets under the action of tangential pressure arch formed by folds. Pressure plate is to prevent stock movement and bounce. Ejector, the role is to facilitate the discharge plate and clean out the pieces of waste. They consist of springs, rubber and equipment, putting on the air support, could move up and down, knocking out pieces of the roof should be designed with enough output, exercise should be limited spaces. Discharge board should try to reduce the closed area or in the operating position of the empty slot milling. Exposure of the stripper plate should have a shield around, stretching your fingers or foreign objects to prevent the entry of the exposed surface of a blunt edges and corners should be inverted.
4. Oriented guide post and guide sleeve part is the most widely used as a guide parts. Its role is to ensure punch and die when the punching accuracy with the gap. Therefore, the guide post, guide sleeve of the gap should be less than the blanking clearance. Pillar die set in the next seat, to ensure that the stroke bottom dead center, the lead in the last column on the face above the top surface of the template for at least 5-10 mm. Pillar should be arranged in the pressure plate away from the module and the location, so that the operator's arms do not get to take over the pillar material.
5. Supporting and clamping the upper and lower parts which includes templates, die handle, punch and die fixed plate, pad, limiter and so on. A template is the basis of the upper and lower die parts, other parts are fixed in the above were installed. Template plane size, especially before and after the direction should be compatible with the parts, is too large or too small are not conducive to operation.
Some die (punching mold) in order to facilitate the pieces required in the mold under the plate. At this time the best and the template plate together with screws between the two plate thickness should be absolutely equal. Plate spacing out the pieces to be subject, not too much, so as not to break the template.
6. Fastening parts which includes screws, nuts, springs, dowel pin, washers, etc., are generally used standard parts. The amount of standard parts stamping die more, the design should ensure secure and flexible selection of the top out of the need to avoid the fastener exposed on the surface operating position, to prevent the bumps staff and hinder operation.
(B) safety tips for mold design
Should try to ensure that the structure of the feed, fixed materials, the pieces, clean up waste easy. For small parts of the processing to non-operator's finger, wrist or other parts of the body area stretching mode operation; for large parts of the processing, if the operator must hand into the mold operation, into the mold to minimize the scope of body parts as short as possible time spent in the mold and the mold should be a clear danger zone, with the necessary protective measures and devices.
Mold on the various parts should be of sufficient strength and rigidity to prevent damage and deformation during use, to have anti-loose fasteners measures to avoid accidental injury operator.
Not allowed to occur during processing waste or workpiece missiles phenomenon, affecting the operator's attention, and even injured the operator. Also to avoid the blanking burr cut staff. During the stamping operation is not allowed when the operator has too much range of motion, to avoid loss of stability of the body posture; not allowed when the job action too much and too difficult. Should try to avoid when stamping a strong noise and vibration. Die design should be marked on the mold in the total figure weight, easy to install and provide security. Machining more than 20 kg should be lifting handling measures to reduce labor intensity. Should be convenient and safe loading and unloading the mold parts to avoid any folders in hand, cut the hand of the possible; mold to facilitate the disintegration of storage. In short, Die even minor issues will affect safety, and only on the specific problems of each type of job analysis in order to make the mold of safety precautions. |
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