DD269331A1 - METHOD FOR BENDING COMPONENTS OF STRIPED MATERIAL - Google Patents

Abstract

The invention includes a method for bending components from strip-like material. Field of application of the invention is the metalworking industry, in particular the forming technique. Object of the application is a method for bending and punching components made of strip-like material. The essence of the invention is that directed from a strip streak strips fed to a Durchsetzfuegestation be connected in several steps in this device together such that the leading and the subsequent strips are formschlüssig at a joint under the condition plate thickness gefüegt formschlüssig. Fig. 1

Description

For this 1 page drawings

Field of application of the invention

Field of application of the invention is the metalworking industry, in particular the forming technique. Object of the application is a method for bending and punching of individual parts.

Characteristic of the known technical solutions

Bending machines are known which produce individual parts from the belt with the aid of object-specialized punching and bending tools. In this case, punching units, transporting devices and bending automation units η are driven by a central drive. In this case, item-specific punching tools are to be installed in the punching unit and component-related bending tools are arranged in centrally arranged bending slide units. This is described in the patents DE 2926457, DE 3312671, DE 2926905.

The known method is based in the automatic production of bent parts on the use of Bandmat 3rial, as well as the use of component related complex stamping and bending tools. Here, the hole patterns and Biegekantsn be generated in sequence. The necessary effort is not suitable to produce components in the smallest quantities at high availability of the process.

Furthermore, the use of strip material, the basis for the production of small quantities, is not possible by the known methods.

Object of the invention

The aim of the invention is to develop a method which is flexible, secures the processing of strips and uses process-flexible punching and bending tools for the production of bent parts.

Explanation of the essence of the invention

The object of the invention is to develop a method which is suitable. Metal strips continuously processed with process-flexible punching and bending tools to produce bent parts.

According to the invention the object is achieved in that a strip stack located in a device isolated, fed to a straightening unit and directed there.

This directional strip is then transferred, defined by an NC feed unit, to a clinch assembly station. Here, the leading and the subsequent strip is connected by a connection point in meneren steps. This joint is designed so that at the same time a free cut is formed by the distance of the strip ends to each other and the condition "sheet thickness - constant" is met.

Furthermore, by creating a free cut and a free cut width, a component length and a cohesion

the strip .sicher ridge width formed. This happens because the pseudo-band thus formed by the NC

Vorschubelnhoit the subsequently arranged working units in element and. Stoiionsbezogen steps is supplied. By flexible tools, with linear constant or varidblern feed extension feature elements in,

generated by the position of the tool in the strip longitudinal direction, dependent sequence.

Upon reaching the respective position of the expansion torques and the bending edges is in the start-stop Betriob by the

associated Arheitsstation a free cut, the extension feature and the bending edge generated.

The feed system operating synchronously with the NC feed unit supports the feed steps and also secures them The end of the strip is separated by a further unit of work. At this point, m.ch becomes the connecting bridge

cut away.

embodiment The invention will be explained in more detail in an exemplary embodiment with reference to drawings. Fig. 1 a: top view of the bent part Fig. 1 b: side view of the bent part Fig. 2: stripe image top view Fig. 3: Biegbfolgen in the strip image Fig. 4: principle of action for the production of the bending sequences Fig. S: Component sequence in Biegewerkteugbereich In Fig. 1 a and 1 b is a bent part with the extension form elements 25; 26 and the bending edges 27; 28; 29; 30 is shown. Fig. 2 and Fig. 3 represent dta process steps for the production of the bending parts shown in Fig. 1 a and 1 b. Here, continuously separated and directed strips are connected to a pseudo-band in that a Verbindungsstulle 24 is generated, which ensures that the sheet thickness is constant. With this connection point) becomes simultaneously Strip end and strip beginning in a free width b positi aniert and the web width B by the radial extent of Junction 24 generated. In the further production of the bidding ^: les, the generated dummy bond becomes a tool in defined advance steps

transported in Folga the cutout 31 with no clearance width b. This is the cohesion of the

Pseudoband securing ridge made with the web width B. The web width 8 defines a Beroich, in which for Biegetmlsortiment no bending edges are present. In further defined steps, the Extension molding elements 25; 26 and the bending edges 27; 28; 29; 30 in a row, based on a component manufactured. The defined feed steps secure the position of the extension form elements 25; 26 and the position of the component end

to the bending tool beginning edge (Fig.5).

In a further feed step, the web is cut out with its clearance width b and the land width B and the Bieteteil isolated. An essential feature of the bending operation, win shown in Figure 4, that with the aid of the bending tool system consisting of

the hold-down 33, the punch 34 and the bending jaw 35 only one, parallel to the transport direction of the dummy band arranged bending edge is generated.

The position of the bending edge 27; 28; 29; 30 to the center of the component is defined by the position of the bending tool system. The Generation of the extension molding elements 25; 26 also takes place in individual steps, with their position in the transport direction

is determined by the feed step and transverse to the center of the component by the position of the single-acting punch.

Furthermore, the use of Streifenmateria) basis of low-volume production by the known Procedure not possible.

Claims (5)

1. A method for bending components ai s strip-shaped material, wherein the transport of the strip separated from a strip of strips in a conventional manner by thrust, characterized in that the means of straightening unit (3) and directed by an NC feed unit (4) a clinching station (5) defined strips are connected together in several steps in this device such that the leading and the subsequent strips at a junction (24) are positively joined together so that a free cut (31) by the distance of the strip ends to each other formed and the BecJung: sheet thickness = constant is met. 2. A method for bending components made of strip-shaped material, according to claim 1, characterized in that formed by generating a free cut (31) and a clearance width (b) a component length (1) and a cohesion of the strip securing web width (B) becomes. 3. A method for bending components of strip-like material, according to claim 1 and 2, characterized in that by flexible tools at rectilinear constant or variable VorschuD extension molding elements (25; 26) in the position of the tool, in the longitudinal direction of the strip, dependent sequence be generated. 4. A method for bending strip-shaped material components according to claims 1 to 3, characterized in that the bending edges (27; 28; 29; 30) are produced in succession with generalized bending tools, the cut-outs (31) generating the bending edges (27; 28; 29; 30) without interference. 5. A method for bending components of strip-shaped material, according to Anpsruch 1 to 4, characterized in that the workpiece is separated by a further method step such that the web with the web width (B) and the clearance width (b) is removed.