The method of manufacture of the product type of thin-walled vessel and procurement for the combined extracts cup

 

(57) Abstract:

The invention relates to the processing of metals by pressure. The inventive method of manufacturing products of the type of thin-walled vessel, loaded with internal pressure, from a round billet, including stamping the glass bottom and the shape of the neckline, which before punching the glass of make a preliminary punching the bottom, receiving without changing the diameter of the workpiece prefabricated disc shapes by displacement of the Central part to the peripheral excess metal to form on the inner side of the recess, the surface of which perform identical end and toroidal parts of the surface of the punch of the subsequent forming of the glass and making the peripheral portion of the workpiece with the outside shape of a truncated cone. Glass stamp by the combined extracts, with the conical surface of the peripheral part of the semi-finished product is combined with an identical surface of the working part of the matrix, and a center punch, combining his face and toroidal surface with the corresponding surfaces of the recess of the semi-finished product, then perform a final stamping the bottom. Preparation for Combi is eve and toroidal surfaces of the cavity pulling from billet Cup, the thickness of the bottom "plate" is less than the thickness of the peripheral part. In the peripheral part of the preform is annular thickening, which is made gradually increasing in magnitude from the edge of the recess to the maximum value, and then gradually decreasing to the edge of the workpiece. The outer surface of the peripheral part of the preform has the shape of a truncated cone, the diameter of the smaller base of which does not exceed the diameter of the extruded from a billet of glass. Technical economical getting integrally-forged metal vessels, loaded with internal pressure, with a small amount of metal in the walls. 2 C. p. F.-ly, 4 Il.

The invention relates to the production of thin-walled metal vessel, loaded with internal pressure, methods of processing metals by pressure.

A known method of manufacturing a pressure vessel [1] including stamping Cup of procurement-the circle and the subsequent rolling of the glass, you get a vessel, the bottom of which the thickness is considerably greater than the wall. It is irrational for vessels loaded with internal pressure, because the bottom of these vessels carries the load in two times less than the wall.

Known harvesting [2] Tyvaenergo of the full product with its vertical wall. The Central part of the workpiece has a thickness equal to the thickness of the sheet stock from which stamp the workpiece and its peripheral area is decreasing thickness in the direction from the annular thickening to the edge of the workpiece.

Such procurement is not applicable for the receipt of vessels with a small amount of metal in the wall, as in this case, it is the peripheral zone of the small size and differs little from the circle, from which you can get a glass hood only when a certain ratio of the diameter of the circle and diameter obtained from the glass.

The invention solves the problem cheap get solid metal vessels, loaded with internal pressure, with a small amount of metal in the walls, made of sheet steel produced by domestic steel plants.

The solution of this problem is achieved by the fact that before punching the glass of make a preliminary punching the bottom, receiving without changing the diameter of the workpiece prefabricated disc shapes by displacement of the Central part to the peripheral excess metal to form on the inner side of the recess, the surface of which perform identical end and training with the outside shape of a truncated cone, glass stamp by the combined extracts, with the conical surface of the peripheral part of the semi-finished product is combined with an identical surface of the working part of the matrix, and a center punch, combining his face and toroidal surface with the corresponding surfaces of the recess of semi-fabrikat, then perform a final stamping the bottom.

The proposed method is distinctive from the nearest similar characteristics, sufficient in all cases: performing before stamping cups of pre-forming the bottom and the preliminary forming by obtaining a semi-finished disc form (pre-punching is done without changing the diameter of the workpiece); obtaining a semi-finished product by displacing the metal from the Central part to the peripheral; education on the inner side of the recess, the surface of which is identical to end and toroidal parts of the surface of the punch further forging of glass; making the peripheral portion of the workpiece with the outside shape of a truncated cone; the location of the workpiece in the matrix for stamping Cup by the combined extracts a combination of the conical surface of the peripheral part of the material with which ernesti with the corresponding recesses of the semi-finished product); execution after this final stamping the bottom.

The solution of this problem is achieved also by the fact that the workpiece is combined extracts cups made with annular thickening and having a variable radial cross-section thickness, made in the shape of a plate with a cavity, the surface of which corresponds to the end and toroidal surfaces of the hollow extruded from a billet of glass, the thickness of the bottom "plate" less than the thickness of its peripheral portion, an annular thickening occurs in the peripheral portion of the workpiece and executed smoothly increasing in magnitude from the edge of the recess to the maximum value, and then gradually decreasing to the edge of the workpiece, the outer surface of the peripheral part has the shape of a truncated cone, the diameter of the smaller base of which does not exceed the diameter of the extruded from a billet of glass.

Proposed procurement for the combined extract is distinctive from the nearest similar characteristics, sufficient in all cases: the execution of the workpiece in the form of plates; the execution of the recess so that its shape follows the shape of the face and toroidal surfaces extruded from a billet of glass; the implementation of the Central execution of the outer surface in the form of a truncated cone, the diameter of the smaller base of which does not exceed the diameter of the extruded from a billet of glass.

The preliminary forming of the bottom before punching the glass by getting a semi-finished disc form can be used to obtain solid vessels loaded with internal pressure, sheet of wrought steels produced by domestic steel plants. The gauge of sheet metal of wrought steels thickness is limited. The rent of such steels in the range of thickness of 3-100 mm is not possible. Rent a thickness of 3 mm and below is scarce and expensive compared to the rental of 10 mm and above. Solid vessels loaded with internal pressure, in some cases there are small metal walls and, consequently, for their production of hot-rolled plates required procurement-circle, the ratio of the diameter to the diameter of the pull from his glass a little. So this piece is either impossible to pull the glass or the glass is unsuitable for further processing because cosine and varying wall thickness, which is inevitable due to the large tolerances on the diameter of the circle. The proposed procurement and method combined part on the conical surface of the working hole of the matrix and the punch combination hood with a hole in the workpiece does not allow you to change the location of the workpiece relative to the matrix and punch in the initial drawing, that allows semi-circles qualitative semi-finished product. Such workpiece and allow you to receive vessels with the least number of operations, so as to deform the minimum amount of metal required only for structural and functional requirements of the vessels.

The thinning of the Central part of the workpiece by displacing the metal unnecessary when the selected thickness of the circle for the formation of the bottom part, and the free end with the formation of an annular thickening at the periphery of the workpiece allows the minimum number of operations to formoobrazovateli the bottom right of the profile (thin in the center and thick at the joints with the wall).

The shape of the workpiece with the presence of the toroidal surface of the recess and the tapered surface of the outer peripheral part allows to have in place a pair of bottom wall extruded from a billet of glass thickness, allowing not reduce the carrying capacity of the billet to extrude when it is thinned Central part.

In Fig. 1, 2 and 3 in the sequence of operations depicted semi-manufactures pre-forming a bottom, a combined draft and final forming of the bottom. Fig. 1 illustrates the method of obtaining none the comfort of the semi-finished product 4. Lower the other one 5 installed before stamping. When forming the prefabricated plunge the Central part, displacing the metal, which, freely dripping, forms an annular thickening at the peripheral portion of the workpiece.

In Fig.4 section shows the proposed procurement with the recess a, the surface of which is in the form of repeats mechanical and toroidal surface "b" pulling of the workpiece material (see Fig.2). The bottom plate has a thickness less than the thickness of the peripheral part "g". The peripheral part of the preform has an annular ledge "d". The outer surface of the peripheral part of "e" is made in the form of a truncated cone.

Using the proposed procurement for the combined extracts it is placed in the matrix, combining its surface "e" with a corresponding surface of the working part of the matrix and the punch hoods combine with the recess in the workpiece.

P R I m m e R. mug Of low carbon steel diameter of 140 mm and thickness of 10 mm was obtained semi-finished product in the form of a plate diameter of 140 mm, the bottom plate had a thickness of 5.5 mm, Then completed a combined hood, getting a glass with a wall thickness of 4.4 mm, and performed the final stamping Donna nia cylinders for gas storage and as housings in carbon-dioxide fire extinguishers.

1. The method of manufacture of the product type of thin-walled vessel, loaded with internal pressure, from a round billet, including stamping the glass bottom and the shape of the neck, characterized in that prior to stamping cups make a preliminary punching the bottom, receiving without changing the diameter of the workpiece prefabricated disc shapes by displacement of the Central part to the peripheral excess metal to form on the inner side of the recess, the surface of which violent identichniy end and toroidal parts of the surface of the punch of the subsequent forming of the glass and making the peripheral portion of the workpiece with the outside shape of a truncated cone, a glass stamp by the combined extracts, this conical surface of the peripheral part of the semi-finished product is combined with an identical surface of the working part of the matrix, and a center punch, combining his face and toroidal surface with the corresponding surfaces of the recess of the semi-finished product, then perform a final stamping the bottom.

2. Procurement for the combined extracts cups made with annular thickening and having a variable radial cross-section of toluol and toroidal surfaces of the cavity pulling from billet Cup, the thickness of the bottom "plate" less than the thickness of its peripheral portion, an annular thickening occurs in the peripheral portion of the workpiece and executed smoothly increasing in magnitude from the edge of the recess to the maximum value, and then gradually decreasing to the edge of the workpiece, the outer surface of the peripheral part has the shape of a truncated cone, the diameter of the smaller base of which does not exceed the diameter of the extruded from a billet of glass.

 

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Deep drawing method // 2245207

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, in particular, process for manufacture of multilayer hollow and shell-type parts from thin-sheet materials.

SUBSTANCE: method involves preparatory operations for producing of layer blanks and simultaneously drawing said blanks in die, with thin-sheet metal being used as material for outer layers and metal or non-metal wire net material being used as material for intermediate layers; performing simultaneous drawing procedure in two steps: first step including drawing in die by means of elastic punch for obtaining of semi-finished product with non-detachable joining of upper and intermediate layers provided that blank material does not go through the entire depth of wire net material upon bunching, and second step including drawing in die by means of elastic matrix of resultant semi-finished product on punch with its form; repeating preparatory operations in accordance with number of layers of product.

EFFECT: increased strength, rigidity and noise insulating properties of parts.

4 dwg

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