METHOD FOR MAKING SEMIHOLLOW ROD-SHAPED STEPPED PARTS

plastic metal working, possibly manufacture of semihollow rod-shaped stepped parts such as rivets, bodies of tenon, shafts, axles and pins in cold upsetting automatic machines. SUBSTANCE: method comprises steps of cutting measured-length blank; successively sizing it at pressing out marking; perform...

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Hauptverfasser:	NURKAEV I.B, GAZIZOV KH.SH, POLOZOVSKIJ V.A, KUZ'MINYKH A.A, ZAKIROV D.M, VALIEV R.SH, BUSHMIN V.S
Format:	Patent
Sprache:	eng
Schlagworte:	FORGE FURNACES FORGING HAMMERING MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES,RIVETS, BOLTS OR WHEELS MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PRESSING METAL PUNCHING METAL RIVETING TRANSPORTING
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creator	NURKAEV I.B GAZIZOV KH.SH POLOZOVSKIJ V.A KUZ'MINYKH A.A ZAKIROV D.M VALIEV R.SH BUSHMIN V.S
description	plastic metal working, possibly manufacture of semihollow rod-shaped stepped parts such as rivets, bodies of tenon, shafts, axles and pins in cold upsetting automatic machines. SUBSTANCE: method comprises steps of cutting measured-length blank; successively sizing it at pressing out marking; performing forward extrusion for making dead cavity in one end of rod; reducing it in lower die with cone deforming portion and outlet sizing portion for making stepped semifinished product having dead cavity on end of less step and finally forming head in other end; combining reducing in lower die with swaging of wall of dead cavity on sizing mandrel arranged at side of end of less step outside of cone deforming portion of lower die. Axial yielding of metal of wall of dead cavity and its shape are set due to contact friction or due to configuration of outlet sizing portion of lower die at next relation of sizes of dead cavity: S/Dp is less than 0.2, where S is thickness of wall of dead cavity of part; Dp is outer diameter of wall of dead cavity of part. EFFECT: enhanced quality of parts, improved strength of tools. 1 dwg, 1 ex
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SUBSTANCE: method comprises steps of cutting measured-length blank; successively sizing it at pressing out marking; performing forward extrusion for making dead cavity in one end of rod; reducing it in lower die with cone deforming portion and outlet sizing portion for making stepped semifinished product having dead cavity on end of less step and finally forming head in other end; combining reducing in lower die with swaging of wall of dead cavity on sizing mandrel arranged at side of end of less step outside of cone deforming portion of lower die. Axial yielding of metal of wall of dead cavity and its shape are set due to contact friction or due to configuration of outlet sizing portion of lower die at next relation of sizes of dead cavity: S/Dp is less than 0.2, where S is thickness of wall of dead cavity of part; Dp is outer diameter of wall of dead cavity of part. 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SUBSTANCE: method comprises steps of cutting measured-length blank; successively sizing it at pressing out marking; performing forward extrusion for making dead cavity in one end of rod; reducing it in lower die with cone deforming portion and outlet sizing portion for making stepped semifinished product having dead cavity on end of less step and finally forming head in other end; combining reducing in lower die with swaging of wall of dead cavity on sizing mandrel arranged at side of end of less step outside of cone deforming portion of lower die. Axial yielding of metal of wall of dead cavity and its shape are set due to contact friction or due to configuration of outlet sizing portion of lower die at next relation of sizes of dead cavity: S/Dp is less than 0.2, where S is thickness of wall of dead cavity of part; Dp is outer diameter of wall of dead cavity of part. EFFECT: enhanced quality of parts, improved strength of tools. 1 dwg, 1 ex</abstract><edition>7</edition><oa>free_for_read</oa></addata></record>
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subjects	FORGE FURNACES FORGING HAMMERING MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES,RIVETS, BOLTS OR WHEELS MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PRESSING METAL PUNCHING METAL RIVETING TRANSPORTING
title	METHOD FOR MAKING SEMIHOLLOW ROD-SHAPED STEPPED PARTS
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