Stamp for drawing body parts
The invention relates to the field of sheet metal forming. Stamp for drawing body parts contains the punch, the matrix pertainym threshold and seizure under puritaine edge placed in the clamp. Pertaini threshold matrix is shifted from its exhaust flange to the periphery. Excavation under puritaine edge performed between the exhaust edge of the matrix and pertainym threshold and adjacent to it. This puritaine edge mounted with a gap relative preteenage threshold equal to the thickness of stamping material taking into account the positive tolerance on the thickness of the sheet. Achieved reduction technology allowance of the workpiece and, consequently, reduction of waste metal. 2 Il.
The invention relates to the field of sheet metal forming and can be used for drawing of various sheet materials.
Preemptive scope - hood presses on simple and double action body parts of automobiles, tractors, agricultural machinery, household appliances and other equipment.
Famous stamp for drawing body parts, containing the punch, the matrix pertainym threshold and clamp with pertainym edge, placed in the zone of peretyagin the area preteenage threshold width of this threshold should be significantly larger (approximately 3 times) traditional 12-15 mm (2) and therefore, for drawing this stamp harvesting must also be enlarged, to its edges advocated pertaini threshold. Technological allowance, extruded from a billet material is formed at the final deformation at such permainan the threshold of increased width and, as a consequence, also has overestimated the width. As technological allowance after the crop is removed in the waste, then the waste is removed the excess metal, which leads to a high consumption rate of sheet metal on the item.
An object of the invention is the saving of sheet metal.
The technical result of the use of the invention is the reduction of technological allowance of the workpiece and hence the reduction of waste metal.
The mentioned technical problem is solved due to the fact that the stamp containing the punch, the matrix pertainym threshold and seizure under puritaine edge placed in the clamp, pertaini threshold matrix is shifted from its exhaust flange to the periphery. Excavation under puritaine edge performed between the exhaust edge of the matrix and pertainym threshold and adjacent to it, and puritaine edge mounted with a gap relative preteenage threshold equal to the thickness of stamping material taking into account the positive tolerance on the thickness l is about after trimming the waste, reduced, thereby decreasing the dimensions of the sheet and the saving of sheet metal.
In Fig.1 shows a cross section of the die of the extrusion. In Fig.2 is a view of a stamp in the final drawing.
Stamp drawing contains the punch 1, matrix 2 with pertainym threshold 3 in the form of a U-shaped depression and the clamp 4 with pertainym edge 5.
Press double action stamp works as follows. Sheet workpiece is placed on the clamping surface of the matrix 2. Further, when the course outside of the press slide down the edge of the billet is deformed and is pressed by the clamp 4. In this case, the billet is drawn into the gap width between Z pertainym threshold 3 and pertainym edge 5. At the end of the press slide down the Central part of the billet is deformed by the punch 1. In the process of extracting the edge portion of the workpiece is moved through pertaini threshold 3 height H1and puritaine rib 5, which is pertaini threshold 3 value of N2. Inhibition of the workpiece when moving through pertaini threshold 3 and puritaine rib 5 is regulated mainly by changing the values of H1and H2that are estimated by the method and adjusted when debugging this stamp is for viterbirate 6 in the gap between pertainym threshold 3 and pertainym rib 5, is on line 7.
On a similar scheme operates stamp sequential pertainym threshold and pertainym edge on a simple press of the action.
Sources of information:
1. Copyright certificate №1442292, B 21 D 22/02.
2. Romanovsky, B. N. Handbook of cold stamping. - L.: engineering, 1979, S. 181, Fig.158.
Stamp for drawing body parts, containing the punch, the matrix pertainym threshold and seizure under puritaine edge placed in the clamp, wherein pertaini threshold matrix is shifted from its exhaust flange to the periphery, the recess below puritaine edge performed between the exhaust edge of the matrix and pertainym threshold and adjacent to it, and puritaine edge mounted with a gap relative preteenage threshold equal to the thickness of stamping material taking into account the positive tolerance on the thickness of the sheet.
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.
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
FIELD: plastic metal working, possibly die tools for forming protrusions in tubular parts in presses provided with systems for automatic feed and discharging parts and for controlling forming process.
SUBSTANCE: automatic press includes press; movable upper plate of press for mounting die set stem in press slide; stationary foundation with part stripper; sleeve movably mounted in central opening of foundation and having yoke and flange movably and coaxially mounted in it; built-up punch; built-up die and wedges. Built-up punch includes group of movable Г-shaped inner cams placed in grooves of yoke and having working surfaces corresponding to outer protrusions of part. Built-up die includes group movable outer cams placed in grooves of yoke and having working surfaces corresponding to shape of outer and inner protrusions of part. Wedges are placed in through openings of flange and body of sleeve wall along its axis; number of wedges corresponds to that of outer cams. Wedges are provided with adjusting screws. Automatic press includes gate type feeder and control system with controller and with pickups for detecting upper and lower positions of press slide, initial position of gate of feeder, part knocking out from die set and also pickup for detecting press charging.
EFFECT: enhanced accuracy and operational reliability of die set.
3 cl, 6 dwg
FIELD: plastic working of metals.
SUBSTANCE: method comprises steps of preliminarily bending strip for forming radius portions between members of blank and finally bending strip by applying normal and tangential efforts to blank members. At preliminarily bending strip its central portion is bent and simultaneously concave cylindrical shape is imparted to members of strip central portion at maximum camber consisting 0.5 - 0.6 of initial thickness of strip. Final bending is realized after applying normal efforts to peripheral portions of blank for further straightening concave portions of blank.
EFFECT: enhanced quality of W-shaped parts due to elimination of thinning them in radius portions.
8 dwg, 1 ex
FIELD: plastic working of metals.
SUBSTANCE: method is designed for making locking devices of gas turbine engines having base and boss from sheet. Method comprises steps of preliminarily and finally forming base and boss; cutting out common blank for base and boss; imparting to boss form of rectangle whose large side is equal to final diameter of boss; preliminarily forming cylindrical portion of boss by applying effort normal to its axis; then finally forming ready article by applying effort along axis of boss. Common blank may be cut by electric erosion process.
EFFECT: enlarged manufacturing possibilities, increased factor of metal usage, lowered labor consumption for making locking devices of improved quality.
2 cl, 3 dwg, 1 ex
FIELD: plastic metal working, namely plastically shaping constructional members of aluminum alloys.
SUBSTANCE: method is used, for example for shaping natural-hardness alloys AlMg, natural-hardness alloys AlMgSc and(or) precipitation hardened alloys AlMgLi. Method comprises steps of elastically deforming construction member subjected to plastic working by action of outer force. Then construction member repeats contour of holding device according to desired final shape of construction member. Method also comprises steps of heating elastically deformed construction member till temperature exceeding temperature necessary for creep deformation and relaxation of alloy stresses. In the result construction member is subjected to plastic shaping at keeping final shape imparted to it at step of elastic deforming.
EFFECT: simplified process, improved quality of constructions.
11 cl, 4 dwg
FIELD: plastic working of metals, possibly shaping articles of sheet materials.
SUBSTANCE: apparatus includes punch, die and shaping chamber with walls in the form of movable sections. Bands for sensing lateral efforts are joined with said walls through intermediate members. Leverage mechanisms with periodic-action drive units are arranged between movable sections of walls and bands. Punch and die are in the form of bases and groups of shaping members. Each shaping member is provided with individual periodic-action drive unit with normalized movement. Shaping members have surface extending from end to side of outlet link of individual drive unit and touching lateral surfaces of adjacent shaping members. Individual drive units provide periodical setting of contour of die and punch. Peripheral shaping members are adjacent to shaping chamber walls. At shaping strokes periodic-action drive units of leverage mechanisms provide squeezing of groups of shaping members of die and punch by means of movable sections of walls.
EFFECT: enlarged manufacturing possibilities of apparatus.
3 cl, 5 dwg
FIELD: plastic working of metals, possibly molding articles of sheet materials.
SUBSTANCE: die set includes punch, die provided with clamps mounted on it at both sides. Said clamps have openings for fixing members and they are mounted through electrically insulated tie rods with possibility of vertical motion. Guiding members are mounted on die and they are electrically insulated relative to die.
EFFECT: enlarged manufacturing possibilities, improved quality of parts.
5 cl, 3 dwg
FIELD: plastic working of metals, possibly manufacture of Г-shaped parts from sheet blanks.
SUBSTANCE: method comprises steps of placing two sheet blanks in die and deforming them by means of vertically descending punch for forming two Г-shaped parts with flange arranged normally relative to rear flat face of parts. Blanks are subjected to upsetting while they rest one upon other by their flat faces.
EFFECT: enhanced efficiency of process, simplified design of fitting.