RU2542052C1 - Manufacturing method of shaped parts of complex profile - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: workpiece of the required length is cut off a strip or a band. Then, the first bending is performed with preliminary formation of wings with puncheons; the second bending is performed with puncheons with formation of a semi-finished product of the base. Then, the semi-finished product is turned through 180°, and at the next stage, the puncheons located perpendicular to length of the semi-finished product are introduced into the walls of the semi-finished product, and formation of undercuts is performed, at the same time, final formation of wings is performed with puncheons. By application of an additional force to the puncheons having grooves and a possibility of axial movement, longitudinal edges of the base of the semi-finished product fill in the grooves of the puncheons and formation of bends is performed as per the shape of the die.

EFFECT: enlarging technological capabilities; increasing a carrying capacity of parts.

7 dwg

Description

The invention relates to the processing of metals by pressure, in particular, to the sequential stamping of the manufacture of shaped parts of complex profile, for example, elongated parts - “crossbars” used in the manufacture of a home refrigerator case.

A known method of manufacturing shaped parts of complex profile from strip or tape material by sequential stamping (see patent for utility model 102645, IPC E04F 13/00, figure 1 (a), (b), (c), 2010 - prototype) in which the material is fed to the cutting position of the legs 3, the legs are cut out, then the legs are bent at an angle of 90 ° to the surface of the base (strip), forming cantilever platforms 6, and then the legs are bent parallel to the base, then bends 8 are formed on the end part, in As a result, the above-mentioned parts of the shaped part have a complex profile in ide "flaps" and form undercuts between the base 1 and the "wings", and, in addition, on the longitudinal edges of the base form folds - stiffeners 5.

In the known method, the following operations are performed: point cutting of the legs 3, bending of the pad 6, bending of the legs 3 parallel to the base 1 and bending of the bends 8 of the “wings”, as well as the implementation of stiffeners 5 - bends of the base 1.

The disadvantages of this method are the large number of transitions and requires a large number of dies, which reduces the productivity of the method, and also reduces the bearing capacity of the manufactured parts due to the non-rigid thin base and the narrowing of technological capabilities due to the manufacture of only short parts.

The technical result of the invention is the reduction of the number of transitions of manufacturing shaped parts of complex profile with an increase in the productivity of the method, as well as an increase in the bearing capacity of the manufactured parts and the expansion of technological capabilities of the method.

The technical result is achieved by the fact that in the method of manufacturing shaped parts of complex profile, having, for example, a base with bends along the longitudinal edges, curly “wings” and undercuts under them, by sequential stamping from strip or tape material, in which the material is fed to the cut position cut the workpiece of the required length, then move the workpiece to the bending position, bend the “wings” with punches into the matrix, form undercuts and bends, unlike the prototype, bend in two stages: first, the first bending is done with the punches with the preliminary formation of “wings”, then the second bending with the formation of the base, after which the semi-finished product is turned 180 ° and the undercuts are formed with the punches while the “wings” are finally formed, while the undercuts are formed perpendicular to the length parts and, in addition, by applying additional force to the punches having recesses and the possibility of axial movement, the formation of bends along the length at the base edges in the form of a matrix

The features of the invention meet the requirement of clause 10.7.4.3 (8) of the Rules:

- “bending is carried out in two stages: first, the first bending is performed with punches with the preliminary formation of“ wings ”, and then the second bending with the formation of the base, ...” - the presence of an action or set of actions (the first bending, the second bending are performed); procedure for performing actions;

- "after which they turn the semi-finished product 180 ° ..." - the presence of action;

- “and the punches produce the undercuts with the simultaneous final formation of the“ wings ”, while the punches for the formation of the undercuts are perpendicular to the length of the part” - the presence of actions (produce ... formation); the procedure for performing actions in time (simultaneously); use of the device (punches);

- "and, in addition, by applying additional force to punches having recesses and the possibility of axial movement, they form bends at the longitudinal edges of the base in the form of a matrix" - the presence of an action or a combination of actions (additional force); use of the device (punches, dies).

As a result of the analysis of the prior art for the same purpose as the claimed method, technical solutions that coincide with the features of the formula of the proposed invention, in the aggregate of essential features were not identified (Article 1350 (2) of the Code).

The set of distinguishing features: “bending is carried out in two stages: first, the first bending is performed with punches with the preliminary formation of“ wings ”, then the second bending with the formation of the base, then the semi-finished product is turned over 180 ° and the punches are formed to form undercuts with the final formation of“ wings ” , while the punches of the formation of the undercuts are arranged perpendicular to the length of the part and, in addition, by applying additional force to the punches having recesses and the possibility of evogo moving, produce formation limb on the longitudinal edges of the base matrix in form ", it allows to achieve the technical result - the number of transitions of reducing production of moldings of complex profile with increased process productivity, and increasing the bearing capacity of manufactured parts and expansion of technological capabilities of the method.

Reducing the number of transitions of manufacturing shaped shaped parts with increasing productivity - three transitions (first bending, second bending, forming undercuts with the simultaneous formation of “wings” and bends of the base), in the prototype — five transitions (cutting, bending at an angle of 90 °, bending of the legs , the formation of bends on them, the formation of bends at the base).

The increase in the bearing capacity of the manufactured parts is carried out by strengthening the base due to its thickening without increasing the thickness of the starting material, which increases the rigidity of the part.

Expanding the technological capabilities of the method - by the possibility of manufacturing long parts from sheet and sheet material with the rigidity of the finished part.

Thus, the signs are in a causal relationship with the specified result (clause 10.7.4.3 of the Rules) and are significant, which allows us to conclude that the technical solution meets the patentability condition of “novelty”, since no means have been discovered from the prior art (device, method ) of the same purpose as the proposed invention, which (the technical solution) is inherent in all the essential features given in the independent claim, (paragraph 24.5.2 of the Rules).

In accordance with paragraph 24.5.3 of the Regulations, an audit of the inventive step has been carried out:

- the closest analogue was determined - the above prototype;

- identified signs by which the claimed invention, characterized in an independent claim, differs from the prototype;

- from the prior art, solutions having signs that match the distinctive features of the proposed invention are not identified.

Therefore, the claimed technical solution meets the condition of patentability "inventive step".

Figure 1 shows the workpiece of the proposed method; figure 2 - the first bending with the preliminary formation of "wings"; figure 3 - the second bending with the formation of limb; figure 4 - semi-finished product after the second bending, inverted 180 °; figure 5 shows the beginning of the formation of undercuts; figure 6 shows the end of the formation of the undercuts with the end of the formation of the "wings" and the formation of limb; 7 shows a finally formed part.

The method is as follows.

The material (strip or tape) is fed to the position of the segments where the blank 1 is cut (Fig. 1) of the required length, then the blank is moved to the bending position and bent with the preliminary formation of “wings” 2 by punches 3 (Fig. 2). Then, the semi-finished product 4 is transferred to the next bending position (Fig. 3) and the second bending is performed by the punches 5 to form a base 6 at the semi-finished product 4 equal to the width of the part. Next, the semifinished product 7 is turned 180 ° (Fig. 4) and at the next position (Fig. 5), punches 8, perpendicular to the length of the semifinished product, are inserted into the walls 9 of the semifinished product 7 and the formation of undercuts 10 is made, and at the same time, the punches 11 produce the final formation of “wings "12 and, in addition, by applying additional force to the punches 11 having recesses 13 and the possibility of axial movement, the longitudinal edges 14 of the base 6 of the semi-finished product 15 fill the recesses 13 of the punches 8 and form the bends 16 (6) according to 17 th matrix.

Thus, the proposed method, compared with the known one, made it possible to produce shaped parts of a complex profile from a single billet, while reducing the number of transitions, reducing the number of dies, increasing the productivity of manufacturing parts, increasing the bearing capacity (rigidity) of the part and expanding the technological capabilities of the method.

The invention is industrially applicable.

Confirmation is the fact of the development of technological and design documentation, the manufacture of an automatic line for the production of shaped parts of complex profile and its use at OJSC Production Association Sergo Plant.

Claims (1)

A method of manufacturing shaped parts of complex profile having a base with bends along the longitudinal edges and curly “wings” with undercuts under them, comprising sequential supply of strip or tape material to the position of the cut, the length of the workpiece of the required length, its movement to the bending position, bending of the “wings” punches, the formation of undercuts and bends, characterized in that the bending of the “wings” is carried out in two stages, while the first bending is done by the punches with the first formation of the “wings”, s the second bending process with the formation of the base, after which the semi-finished product is turned 180 ° and the punches are formed to form undercuts with the final formation of “wings”, while the punches for forming the undercuts are placed perpendicular to the length of the semi-finished product, and the bends are formed on the longitudinal edges of the base according to the shape of the matrix by application of additional force to punches having recesses and the possibility of axial movement.

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