How to crop heads, core products
(57) Abstract:The inventive method of application crop head core products includes cutting the trim tool in the end surface of the head opposite to the rod side when the support matrix only part of the support surface of the head inside the projection of the cutting contour of the trim tool. 2 Il. The invention relates to the production of core products with the head.There is a method of trimming heads of core products used in the manufacture of hex bolts, including cutting cutting cutting tool in its end surface opposite to the rod side when the support matrix of the entire bearing surface of the head, inside the projection of the cutting contour of the trim tool on a plane perpendicular to the axis of the rod, followed by dartanium head attached to the rod axial forces in the absence of pressure on the matrix support surface of the head (1).The disadvantage of this method great effort of trimming heads, due to the large surface area of contact of the billet head bolt with bearing surface of the matrix to them the material I head to its periphery.The technical result achieved by the invention reduction efforts trimming heads of core products.This is ensured by the fact that in the method of trimming heads of core products, including cutting the trim tool in the end surface of the head opposite to the rod side when the support matrix support surface of the head, inside the projection of the cutting contour of the trim tool on a plane perpendicular to the axis of the rod and subsequent dartanium head by the application of axial force to the end of the rod in the absence of pressure on the matrix support surface of the head, cutting the trim tool in the cylinder is produced with the support matrix of the support surface of the head.The trim head on the proposed method requires much less effort, because the cutting of the trim tool into the head is not accompanied by friction on the contact bearing surface of the head with the matrix due to the fact that the bearing on the matrix are only part of the bearing surface of the head.In Fig.1-left shows the initial incision, the right current ramping, Fig.2 is a left-end point of cutting, match the IG. 1) the trim tool 1 into the head of the billet bolt 2 creates a pressing of only part of the support surface of the head of the workpiece to the support surface of the die 3; F part of the surface of the head inside the projection of the cutting contour of the trim tool on a plane perpendicular to the axis of the rod blank, and neverauskas on the matrix during the whole process of cutting (shown by the dashed line).Dartania head (Fig. 2) is produced by the application of force from the ejector 4 to the stem of the workpiece 2 in the absence of the bearing support surface of the head to the matrix 3.At the final moment of dartania head is broken fin from the body bolt billet 2.A method for cold forming bolt has significantly reduced the effort of trimming heads, increased resistance of the trim punch and matrix in comparison with the above-mentioned method of the prototype. How to crop heads of core products, including cutting the trim tool in the end surface of the head opposite to the rod side when the support matrix support surface of the head, inside the projection of the cutting contour of the trim tool is RCU rod in the absence of pressure on the matrix mentioned bearing surface of the head, characterized in that the cutting of the trim tool in the cylinder is produced with the support matrix of the above the supporting surface of the head.
FIELD: plastic working of metals, possibly operations for finish working of forgings of double-end box nut wrenches.
SUBSTANCE: die set includes upper and lower plates with guiding columns, punch for punching operation mounted on upper plate, stripper, lower die for punching, half-open trimming lower die and trimming punch. Trimming lower die is mounted on upper plate; it has cutting edge and cavity arranged behind collar of cutting edge and designed for freely placing forging of nut wrench. Trimming punch is mounted on lower plate and it has embracing supporting surface for fixing forging at trimming and straightening operations.
EFFECT: enhanced quality of forging.
9 dwg, 1 ex
FIELD: metal working, possibly manufacture of flanged articles and articles without flanges of different alloys.
SUBSTANCE: method comprises steps of heating blank and deforming it in die set; sustaining relation of blank temperature to that of die set in range 0.7 - 7.4. Blank is heated in predetermined temperature range depending upon blank material. Said temperature range may be found from ductility diagram and(or) yield curves and(or) from blank material recrystallization diagrams.
EFFECT: enhanced factor of using metal, improved quality of articles, lowered labor consumption of forging and subsequent working of blank.
6 cl, 2 dwg, 2 ex
FIELD: plastic working of metals, possibly forming forged pieces, for example rings, gear wheels, flanges.
SUBSTANCE: initial blank is heated, preliminarily shaped, finally formed and trimmed. At final forming open die set is used; said die set has gap between its upper and lower halves. Said gap is arranged in zone of forging that is formed last. Dimensions of die set are no more than respective dimensions of forging in order to prevent deforming of displaced excess of metal.
EFFECT: lowered deforming efforts, decreased metal consumption.
11 cl, 2 dwg, 1 ex
FIELD: plastic working of metals, possibly manufacture of forged pieces with central opening.
SUBSTANCE: method comprises steps of upsetting heated initial blank; forming semi-finished product having bridge in zone of one end of its inner portion in die set without forming burr; remaining part of end surface having no contact with tool; then performing final forming, mainly in one half of open die set at displacing outer burr and with possibility of displacing inner burr; removing bridge and trimming burrs.
EFFECT: lowered metal and energy consumption at process.
20 cl, 6 dwg, 1 ex
FIELD: plastic metal working, namely processes of die forging, possibly for manufacturing stepped hollow shafts.
SUBSTANCE: method comprises steps of calibrating blank prepared by chopping; forming in blank upper and lower cavities, bottom portion with cylindrical near-bottom part and local outer bulged zone. Upper cavity is formed at first pressing out stage. At second stage of pressing out lower cavity, bottom portion and local outer bulged zone are formed simultaneously while blank is centered by punch along it upper cavity and in die along cylindrical near-bottom part.
EFFECT: enlarged manufacturing possibilities of method.
FIELD: plastic working of metals, possibly manufacture of hollow parts such as sleeve type parts with central protrusion on inner surface of bottom, namely artillery shell cases.
SUBSTANCE: method comprises steps of backward pressing out of initial blank and shaping bottom portion having protrusion on inner surface during several transitions. After backward pressing out transition, blank is drawn at several transitions. Bottom portion with central protrusion is formed during two transitions, namely: at transition for preliminarily shaping central protrusion and at transition for finally forming bottom portion. Preliminary forming is realized during transition of backward pressing out of initial blank by means of inner punch with recess. Final forming is realized by means of inner punch with recess and outer punch with protrusion.
EFFECT: improved quality of articles.
FIELD: plastic working of metals, namely forging production, manufacture of forged pieces of ring-like cone gear wheels with diameter 638 mm and with wide massive rim.
SUBSTANCE: method comprises steps of preliminarily upsetting initial blank with diameter 250 mm and length 335 mm; then subjecting upset blank to non-complete open broaching and its further die forging. All operations are realized in the same die set. Preliminary upsetting is performed on flat striker with diameter 350 mm till achieving diameter of upset blank equal to said value. Striker is arranged in central portion of die set impression before broaching and after broaching it is removed. Non-complete open broaching of upset blank is realized by means of detachable cone broach with mounting land having diameter 270 mm.
EFFECT: improved quality of produced forged pieces.
8 dwg, 1 ex
FIELD: plastic working of metals, possibly manufacture of axles of rolling stock by forming and forging.
SUBSTANCE: method comprises steps of deforming initial square cross section blank by forging till intermediate designed size by knocking off faces in order to form semi-finished cylindrical product of forged piece; then feeding semi-finished product of forged piece to hammer die set. Die set is detachable one, it includes two parts with cavities restricting open finish impression without flash grooves. Profile of finish impression of die set corresponds to final size of forged piece. Two compensation openings are arranged in ends of impression. In die set hot die forging of semi-finished product driven to rotation by means of manipulator is realized. Then excess metal on ends is trimmed, forged piece is straightened and cooled.
EFFECT: enhanced quality of forged piece due to providing optimal deforming schedule, lowered power and metal consumption.
4 cl, 5 dwg
FIELD: plastic working of metals, possibly manufacture of internal combustion connecting rod by closed forming.
SUBSTANCE: method comprises steps of preparing blank with two thickened end portions and one thickened portion in mean zone; deforming prepared blank in cavity of die set while making openings in thickened end portions at displacing blank metal; shaping mean portion of connecting rod and after-forming its heads. Volume of thickened portion in mean zone of blank exceeds volume of mean portion of article by value equal to half of total metal volume of blank displaced at making said openings. Gravity center of thickened portion of mean zone is spaced from axes of openings by distance inversely proportional to metal volumes displaced at forming respective openings.
EFFECT: improved quality of article.
2 dwg, 1 ex
FIELD: plastic working of metals, possibly forging blanks of nickel base super-alloy.
SUBSTANCE: method is realized with use of forging press with forging die sets of nickel base super-alloy having yield limit no less than stress of plastic yielding of super-alloy at forging for making forged pieces at temperature range approximately from 926.67°C till approximately 1010.00°C at nominal deformation rate. Blank for forging and die sets are heated till said forging temperature. Forging is realized at such temperature and at nominal deformation rate. Nickel base super-alloy selected from group of alloys may be used as material of forged blank. According to one variant of invention blank of compacted powder of nickel base super-alloy is used for forging. In such case die sets are made of nickel-base super-alloy containing, mass%: aluminum, approximately 5 - 7%; molybdenum, approximately 8 - 15%; tungsten, approximately 5 - 15%; magnesium, near 140 ppm; nickel and impurities, the balance.
EFFECT: lowered costs for producing forged pieces of super-alloy with desired properties.
15 cl, 3 dwg, 2 tbl