Method of making curved parts of the rod
The invention relates to the processing of metals by pressure and can be used in the production of parts made from a bar type terminal rail mounting. The method is carried out in a mould by first flexible on the mandrel end sections of the workpiece, releasing them from contact with the mandrel and subsequent flexible the rest of the workpiece, with the initial bending lead to the formation of two loops running on the rod by a pair of rollers moving along a curved path, then fix the blank and bend two sites distant to the center of the workpiece from the previously bent in the same direction until the formation of the third loop. Productivity increases. 7 C.p. f-crystals, 11 ill.The invention relates to the processing of metals by pressure and is intended for use in the metallurgical industry for the production of rod-type terminals rail fasteners, connecting straps and loops.A known method of manufacturing a curved parts of the rod /1/ implemented stamp by initial and subsequent flexible workpiece. These characteristics coincide with the essential features of the claimed invention.The disadvantage of this spacescape. On the first transition is only one bend in the workpiece, and the second transition - dogive one end of the workpiece at an angle to the plane of the first bend and forming the other end of the workpiece, which enables to produce only simple details narrow range.A known method of manufacturing a curved parts of the rod /2/ with three loops implemented in the stamp by first flexible on the mandrel end sections of the workpiece, releasing them from contact with the mandrel and subsequent flexible the rest of the workpiece. These characteristics coincide with the essential features of the claimed invention. Subsequent bending the middle part of the workpiece lead into the direction opposite the initial bend.The disadvantage of this method is the inability to receive one stamp of parts with loops on the ends of the workpiece and the big loop in the middle part. In addition, the dimensional cutting of the workpiece outside of the bending of the stamp on a separate press requires the use of special transmitting devices, synchronized with the operation of the stamp.The closest in technical essence to the claimed is a method of making curved parts of the rod /3/ having three loops implemented in W is akami and subsequent flexible the rest of the workpiece. These characteristics coincide with the essential features of the claimed invention. Subsequent bending the middle part of the workpiece lead into the direction opposite the initial bend.The disadvantage of this method is the inability to receive one stamp of parts with loops on the ends of the workpiece and the big loop in the middle part, due to inappropriate schemes implementation of technological transitions flexible.For analogs and prototypes common cause, preventing the manufacture of parts having loops at the ends of the workpiece and the big loop in the middle part, is unacceptable execution scheme of technological transitions.The basis of the invention is the task in the method of manufacturing the curved parts of the rod by means of rational operations flexible to provide the possibility of making one stamp with high performance parts that have loops on the ends of the workpiece and the big loop in the middle.To solve this problem a method of manufacturing a curved parts of the rod, with three loops, carried out in the stamp by first flexible on the mandrel end sections of the workpiece, releasing them from contact with the mandrel and subsequent flexible the rest of the duck by a pair of rollers, moving on curved trajectories, then fix the blank and bend two sites distant to the center of the workpiece from the previously bent in the same direction until the formation of the third loop. The initial bending of the workpiece are running on the rod by a pair of rollers moving in circles with centers located inside two loops at more than a right angle 180





Claims
1. Method of making curved parts of the rod, with three loops implemented in the stamp by first flexible on the mandrel end sections of the workpiece, releasing them from contact with the mandrel and subsequent flexible the rest of the workpiece, characterized in that the initial bending lead to the formation of two loops running on the rod by a pair of rollers moving along a curved path, then fix the blank and bend two sites distant to the center of the workpiece from the previously bent in the same direction until the formation of the third loop.2. The method according to p. 1, characterized in that the initial bending of the workpiece are running on the rod by a pair of rollers moving in circles with centers located in retia loops form a subsequent flexible workpiece by another pair of rollers at an angle more 90
FIELD: plastic working of metals, possibly manufacture of annular blanks of parts such as races of bearings.
SUBSTANCE: method comprises steps of punching central portion of blank for making preliminary opening less than opening of ready part; placing blank between die and punch and drawing it at stretching said opening; selecting size of flat blank according to calculated condition for making two blanks; before drawing forming in flat blank preset shaped profile of parts and performing drawing in the form of U-shaped circular profile; dividing parts by removing excess material.
EFFECT: increased factor of using material, lowered labor consumption, improved accuracy of formed parts.
3 dwg, 1 ex
FIELD: plastic working of metals, possibly manufacture of parts with variable wall thickness from sheet blanks.
SUBSTANCE: forming apparatus includes die and sectional punch and in addition it includes support arranged over die. Between die and said support gasket is placed with possibility of changing it. Central punch has axial recess for placing buffer gasket having plug or draw plate overlapping it in order to provide desired resistance of buffer gasket to metal flowing process.
EFFECT: possibility for forming large size parts at high accuracy.
1 dwg
FIELD: plastic metal working, possibly forming protrusions in tubular parts in units with automatic feed of parts and control system.
SUBSTANCE: automatic pressing aggregate includes press, upper plate with lower die moved by means of press slide, stationary lower plate supporting die set body and punches. Punches are arranged along perimeter of die set body and they have working wedges engaging with cams. Punches are built-up ones along their height, they have at least two portions whose butt zone is arranged inside sleeve between die set body and yoke. Sleeve has turnings for placing butt zone of punch. Radial openings are formed in die set body at level of butt zone of each punch normally relative to its axis. Aggregate is provided with mechanism for loading-unloading parts with use of tray having spring-loaded guide pins in its horizontal portion and with control system. The last includes controller and pickups for detecting upper and lower positions of press slide, initial position of pusher of loading-unloading mechanism, part release from die set and also sensor for controlling operation of two last pickups.
EFFECT: enhanced operational reliability of aggregate.
5 cl, 6 dwg