Method of forming a conical sheet material
(57) Abstract:Usage: the invention relates to the processing of metals by pressure and can be applied when forming the conical parts, including the bottom. Essence: in the original piece cut out two sectors, which are symmetrical with respect to one another, and in the stamp without pressure exercised by forming in one process transition. Then butt weld. This significantly reduces the degree of deformation and prevents the formation of corrugations. 4 Il. The invention relates to the processing of metals by pressure, in particular to methods of cold forming, and can be used when forming the conical parts.Known methods of extraction in a single operation shallow and medium-conical parts (Romanovsky, B. N. Handbook of cold stamping. 6 edition-HP engineering, 1979, S. 158, Fig. 134 a, b).The known method multistage extraction high conical parts (ibid, S. 158, Fig. 135,b). Preparing the production of such parts requires considerable costs associated with the manufacture of complex die tooling. The choice of materials for such components is limited ductility.>However, this method cannot, for example, to carry out the forming of the conical parts with the bottom.The proposed method differs in that the workpiece is cut symmetrically additional sector, and the shaping is carried out in the stamp without a clip with the subsequent welding of the joint.In Fig.1, 2 shows the source of the workpiece of Fig.3, 4 parts obtained by this method.The sector sizes depend on the design details, the cone angle and is determined by calculation with the subsequent practical training process.In this way it is possible to make cone details virtually unlimited height, even in a single small-scale production under the most adverse to extract relationships between material thickness and diameter of the workpiece, from maloplastichnye materials. The method of forming tapered parts, including the process of cold forming a flat round billet with a cutout in the form of a sector, characterized in that the workpiece is cut symmetrically additional sector, and the formation is carried out in the stamp without a clip with the subsequent welding of the joint.
FIELD: plastic working of metal.
SUBSTANCE: method of deep drawing-shaping on punch of box-type parts comprises steps of making flanged blank; then shaping blank at reserving formed material in annular grooves on flange of blank; stretching formed material onto punch; additionally reserving formed material in central part of blank in recess of said part; drawing material from reservation zones at braking it. Invention provides increased depth of drawn box type parts by 1.5 -2 times.
EFFECT: increased depth of drawn parts.
2 cl, 2 dwg
FIELD: plastic working of metals, namely local shaping of metal sheets.
SUBSTANCE: mill includes housing; table having motion drive unit; die having desired relief surface and secured to table; cross piece with vertical motion drive unit mounted in its center; shaft with elastic envelope for preliminary deforming; rigid deforming profiled shaft and smooth shaft with pressure rollers. Table carrying die is in the form of cylinder mounted with possibility of rotation around horizontal axis. Deforming rigid profiled shaft is mounted in center of stationary cross piece and it is joined with vertical motion drive unit. Shaft with elastic envelope for preliminary deforming and smooth shaft are mounted on edge portions of cross piece and they are spaced by the same distance from vertical axis of rigid deforming profiled shaft. Shaft for preliminarily deforming is mounted at side of feeding blank. Smooth shaft with pressure rollers is arranged at outlet of mill.
EFFECT: enhanced efficiency, lowered metal and energy consumption for making products in mill.
FIELD: plastic working of metals, possibly local shaping of ducts in flat heat exchangers.
SUBSTANCE: mill includes housing; table; horizontal motion drive of table; die with relief surface secured to table; cross piece mounted in housing on axle with possibility of rotation; shaft mounted in central part of cross piece and having elastic envelope for preliminary deforming of sheet blank. Said shaft is provided with drive for moving it in vertical direction. Mill also includes two rigid shafts with profiled surface and with screw-down mechanism. The last has guiding strips secured to table. Said rigid shafts are mounted on end portions of cross piece. Pressure rollers are arranged on end portions of rigid shafts with possibility of engaging with guiding strips. Rollers of left shaft are mounted with possibility of engaging with guiding strips when table moves to the right and vice versa.
EFFECT: improved efficiency due to using return stroke as working one, lowered metal consumption of mill, reduced energy consumption for making products.
3 cl, 6 dwg
FIELD: plastic working of metals, possibly local shaping of ducts in panels of flat heat exchangers.
SUBSTANCE: mill includes housing, table with drive unit for moving it horizontally; die mounted on table and having desired relief surface; cross piece secured to housing; two deforming shafts with elastic envelope; vertical motion drive unit; rigid deforming shaft mounted in center of cross piece and having relief lateral surface. Said shafts with elastic envelope are mounted on end portions of cross piece.
EFFECT: enhanced efficiency, lowered metal and energy consumption of mill.
3 cl, 4 dwg
FIELD: plastic working of metals, possibly local shaping of metals.
SUBSTANCE: tool for local shaping of metallic sheet includes rigid shaft with elastic polyurethane members. Rigid shaft is in the form of screw with washers having technological protrusions for fixing elastic polyurethane members and with nuts used for additional fixation and placed on end portions of rigid shaft.
EFFECT: enhanced quality of articles of soft steels, possibility for working steels being more hard-to-form ones.
FIELD: sheet forming processes and equipment, possibly in machine engineering for making precise parts with rigidity ribs.
SUBSTANCE: method comprises steps of blanking sheet blank and forming relief rigidity ribs. At first rigidity ribs are formed in direction opposite to desired direction and then rigidity ribs are reformed in reverse direction according to design of made article.
EFFECT: enhanced rigidity, improved accuracy of article geometry, prevention of stability loss of article.
5 dwg, 1 ex
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.
SUBSTANCE: die set for shaping tubular blanks at heating them includes detachable die mounted in rigid casing; punch; working body of loose electrically non-conducting material. Working body also includes elastic rod arranged in loose electrically non-conducting material having low heat conductivity factor.
EFFECT: simplified die set tooling for shaping high-strength and elastic materials at significant shaping degree.
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.