Method of producing variable-corrugation elements

FIELD: process engineering.

SUBSTANCE: invention relates to construction and may be used for production of variable-corrugation metal and nonmetallic sheet straight and curved elements. Billet is clamped between rotating female die and male die selected from different-gage and/or different-form male dies to match female die. Replacement or male and female dies does not require outage of process line.

EFFECT: higher efficiency of processing, expanded performances.

1 dwg

 

The invention relates to the construction and can be used for the manufacture of alternating corrugated sheet metal and non-metal elements straight (walls beams and columns) and curvilinear (wall arches and reference paths) shape.

Under variable shirring means predominantly transverse (perpendicular to the longitudinal axis) shirring sheet element blanks corrugations with a height and/or step and/or profile. Individual bumps along its length may be constant or variable (i.e. wedge-shaped or in the form of half of a truncated cone section. Bumps may extend on both (both) sides (edges) of an element only on one face do not go to the edges of the element - the so-called "hollow" of the corrugation. The corrugations may be unilateral or bilateral relative to the median plane of the element.

The known method conventional corrugating sheet metal blanks by rolling between the rotating towards each other rollers (Metal construction. 3 T. T.1. Structural elements: Textbook. for builds, universities / VII, Bouverot, You and others; Ed. by Rev. - 3rd ed. wiped. - M.: Higher. HQ., 2004. - 551 S.; Il. S).

Traditional shirring implies the constancy of the parameters of the corrugations in the framework of a specific element.

The level of technical and (Romanovsky VP Handbook of cold stamping. - 6th ed., revised and enlarged extra - L.: engineering. Leningrad. separa-tion, 1979. - 520 C., Il. P.51) known way flexible metal blanks. This method consists in the elastic-plastic deformation of sheet metal by pressing between the matrix and the punch.

The closest in technical essence and purpose is known from the prior art tool (RU 2199409 C2, B21D 13/06, B21D 5/06, 27.02.2003) - "Device profile". This device implements the method of corrugating sheet items by means of forming a wavy profile elements mounted on an endless chain drive and support elements. According to the description of well-known means forming a wave-like profile of the levers can be moved relative to the endless chain transfer perpendicular to the plane of the supporting levers at their location opposite the mentioned plane. The result of the use of the nearest equivalent is a corrugated sheet with a regular or irregular arrangement of the corrugations. In the latter case the surface is obtained at the output of the device material is an alternating two waves and flat plot.

The disadvantage of these methods is the static parameters of the corrugations produced in the process of corrugating element, i.e. the above pic which would not allow to receive the output AC shirring without stopping the process and the forming elements.

The technical result from the use of the proposed method lies in the possibility of a continuous automated process corrugating elements corrugations of varying geometrical parameters.

Presents the result aimed at achieving the following objectives: rational consumption of materials, ensuring high performance, production elements of the optimal design of forms.

This technical result is achieved due to the fact that in the stamping mill used a rotating matrix containing different caliber and/or the profile of the grooves, and a set of replacement of different sizes and/or different kinds of punches corresponding to the grooves of the matrix. While changing forming elements forming the corrugations, is in the process of corrugating the blank, i.e. without stopping the production stage.

Application in the technique of alternating corrugated elements (primarily walls of building structures) allows to reduce the consumption structures through rational allocation of material and increase their power of resistance to loads and effects.

The invention is illustrated by the figure, which presents the scheme of the stamping mill that implements the method of manufacturing a variable-corrugated sheet elements. The diagram shows: 1 - blank; 2 - p is giving the rolls; 3 - receiving rolls; 4 - the pinch roll; 5 - punch; 6 - cassette with a set of different sizes of punches 5; 7 - feeding mechanism of the punches 5; 8 - plunger punches 5; 9 - revolving matrix with a set of different-sized slots; 10 - base matrix 9; 11 shaft matrix 9 connected to the rotor and supported on a saddle-shaped pushers; 12 - retractable support plate of a dielectric material for the plug 5 at the time of replacement of the gauge; 13 - lifting tappets.

The proposed method is as follows:

- the formation of the blanks 1 of the required dimensions, as amended by subsequent shirring;

- transfer of the workpiece 1 in a stamping mill;

the workpiece 1 to the matrix 9 and the punches 5 through the supply roll 2 and the pressure roll 4;

- set matrix 9 to obtain the desired caliber and/or profile (due to the rotation of the shaft 11) of the flute and select the appropriate plug 5 from cassette 6 (due to the feeding mechanism 7);

- workpiece clamp 1 to the matrix 9 and the plug 5 at the expense of the pusher 8;

- calibrating hollow punch through punch 5 for a snug fit of the workpiece 1 to the matrix 9 and the punch 5 to obtain the desired geometry of the profile.

- the return of the punch 5 in the initial position;

- lifting of the workpiece 1 with the lifting plungers 13;

- transfer of the workpiece 1 on the receiving shaft and 3;

change (if necessary) profile and/or caliber of the groove matrix 9 and the corresponding punch 5;

- repeat the molding cycle.

At the time of forming the matrix 9 based on the supporting base 10. The rotation matrix 9 is carried by a shaft 11 connected to the rotor and supported on a saddle-shaped pushers, allowing you to lift the matrix 9 (together with the shaft 11 at the time of its rotation.

The pusher 8 of the punch 5 is driven by a crank, hydraulic other mechanism.

With a relatively small thickness afrirampo element (components (1) and/or wavy profile of the corrugations, and in the case legkodeformiruemyh the workpiece material 1 the need for a remote calibration kick off. It seems that in some cases, a sufficiently large pressing force will ensure a tight fit of the workpiece 1 to the forming elements (matrix 9 and the punches 5) and without calibration blank shot. In some profiles of corrugations (e.g., rectangular) calibration dull stroke can lead to blockages in the bottom point that is described in the book: Romanovsky VP Reference cold stamping. - 6th ed., revised and enlarged extra - L.: engineering. Leningrad. separa-tion, 1979. - 520 series. P.53.

Thus, implementation of the proposed method without operation of the calibration blank shot in the General case possible.

At the time of replacement of the punch 5 to prevent it from falling out is nominated supporting plate 12, which may be made of a dielectric material in the case of attachment of the plug 5 to the plunger 8 by means of an electromagnet.

The movement of the punches 5 in the cassette 6 through a feed predominantly hydraulic mechanism 7.

For synchronization and coordinated operation of the mechanisms, the proposed method can be an effective use of numerical control (CNC) using the computer.

A distinctive feature of the proposed method is a continuous automated crimping of the workpiece 1 with the use of a rotating matrix 9 and set replacement punches 5. The change calibers and/or profiles of the punches 5 and the rotation matrix 9 occur without stopping the process corrugation.

The result of the use of the proposed method is a variable-corrugated element, which can vary as a step and/or the height of the corrugations and their profile,

The presented method focuses primarily on cross shirring elements, i.e. corrugations perpendicular to the longitudinal axis along the largest side of the element.

Peculiarities of application of this method are the need of accounting for the deformation the workpiece 1 in the process of corrugation; thinning and changes in the elastic-plastic properties (for metals - hardening) material item, primarily in the areas of inflection; elastic springback of the workpiece 1; minimum radii of curvature. These features can be accounted for by known in the art forming methods.

The workpiece 1 can be heated before stamping process to improve the plastic properties and reduce internal stresses. Temperature stamping rational to agree with the temperature regimes of other operations, for example with the temperature of the heating elements at the weld zones and wall beams or parts of the wall between them. Justified differential heating of the billet 1: plots of the workpiece 1, which will be located corrugations with a relatively higher stiffness, i.e. a small step and a large height, as well as a flute, whose profile suggests an abrupt change in the direction of the sheet (triangular, trapezoidal and other with pronounced edges) are exposed to a greater intensity of heat treatment, in order to better ensure the required deformation.

The speed of advancement of the workpiece 1 through the stamping mill may be irregular. For example, the change of caliber or profile of the corrugations, i.e. the rotation matrix 9 and select the appropriate plug 5 may require reducing the speed of the filing of the workpiece 1.

Material properties punching tools (primarily the punch 5 and the matrix 9) are assigned with prevailing regulations in forming techniques.

Side of the workpiece 1, converted to the matrix 9, or working surface of the matrix 9 can be processed grease for easy removal of the workpiece 1 with the matrix 9.

Method of corrugating elements with obtaining the corrugations of varying geometrical parameters, including the workpiece by the punch and the die and workpiece clamp between the matrix and punch, characterized in that the variation of the geometrical parameters of corrugations carried out using a rotating matrix containing different caliber and/or the profile of the grooves, and a set of interchangeable different sizes and/or different kinds of punches corresponding to the grooves of the matrix, and the changing profile and/or caliber of the groove matrix by its rotation and the corresponding punch carried out without stopping the process of corrugation.



 

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4 cl, 3 dwg

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