Factors affecting the sealer quality billet shearing

Source:   Date:2014-10-28 15:46:34   Views:

Precision machining processes such as forging or extrusion process used sealer rough cut weight tolerance generally require small, small collapse angle, flat section and perpendicular to the axis. But so far, different precision machining process on rough quality requirements are not a unified standard. In actual production, mainly on the △ V, volume 4, and So AV error for sealing and cutting machine cut blanks, coins for the cross-section inclination, S is a section ovality. Fine seal packaging machine shearing cut production of packaging blanks general requirements section inclination should not be greater than 1 ", and the production of billet weight error should not be greater than 10.8%. In this standard production packaging blanks to be able to meet the general requirements of precision machining technology in the actual production volume is too large it will not reduce the error caused by the life of the die or the volume error is small and insufficient to form a shaped case appears.
From the above analysis we can draw the following conclusions, quality packaging sealer section after the rough cut most and a lot of factors, but the main factors affecting the quality of the cross-section blade attachment material stress state, the original free sealer scissors when cutting, bending and upturned phenomenon exists packaging, cutting edge material discontinuity, material flow along the circumferential direction only, but also occurs in the axial and transverse flow, sealing and cutting machine cut blank section after a serious collapse angle phenomenon, section irregularities and ovality very serious. When pinch-cutting machine cutting, clamping force due to bending and upturned packing phenomenon can be eliminated, so that the edge of the material is in an ideal state of pure shear sealer material only compressive stress, then limit the axial and transverse flow of materials compressive stress, and disappeared. If you move, the axial clearance static cutting edge of reasonable, crack sealing and cutting machine shearing along the predetermined sealer shear plane straight extension, will not crack branching and so on. From the analysis of several aspects of the shear bar sealer geometric relationships, stress conditions, sealing and cutting machine shearing process and other shows, single radial clamping has the following advantages:
(1) limits the phenomenon of bending and upturned packing sealing and cutting machine cutting time, greatly improve the sealer cut quality.
(2) The radial clamping sealer shear stress state of the material change, effectively suppresses the generation and propagation direction of the surface crack CRACK improve the quality of the blank section of the site. (3) Packaging radial clamping sealer eliminates shear reasons sealer cut packaging section tilted from the geometric relationships.