DE10317777A1 - Process for molding workpieces - Google Patents

Abstract

Process for shaping workpieces from material strips uses an auxiliary shaping agent and a tool that at least partly or completely penetrates the material strips along a contour. The auxiliary shaping agent is applied to one or both sides of the material strips only along the contour of the workpiece before shaping of the workpiece. Preferred Features: The auxiliary shaping agent is applied to both sides of the material strips along the contour during the shaping process or in a step before shaping.

Description

The The invention relates to a method for molding workpieces a strip of material using a molding aid a tool that is at least partially or entirely along a Contour penetrates into the material strip.

State of the art

in the State of the art are many methods for molding workpieces Strips of material known. For example. are workpieces made of sheet metal from appropriate Metal strips are punched out or cut out using a fine blanking process. A corresponding fineblanking process is described, for example, in the ....

The Invention relates to cutting and forming processes such as shear cutting and fineblanking but also on other methods of shaping and forming Workpieces, e.g. bending, drawing, extrusion, stretching, pressing, deep drawing, Notching, cutting, half cutting, etc. It relates on all processes involving the shaping and forming of workpieces Forming aid, e.g. B. a lubricant with Ausformverbessemden Additives, on one or both sides of the material strips and / or the workpiece is applied. This is especially true when there are material properties abrasive and / or adhesive affect the forming tool and therefore using the Forming aid, for example, by lubricating or cooling the Friction and wear behavior is reduced.

at All of these known methods have the disadvantage that the order a large area takes place, so that a lot of molding aid is wasted. Furthermore, for the actual molding aid (additive mix) is usually a carrier medium, z. B. oil, required, which contaminates the material strip, so that an ex post Cleaning must be done.

task

task The present invention is the application of molding aid on the material strips significantly more fuel-efficient and functional to make it more efficient.

Solution of the task

to solution accomplishes this task that a molding aid only along the contour of the one to be molded workpiece before shaping the workpiece is applied to the material strip on one or both sides.

there is it desirable the contour of the forming line and the width and thickness of the order to define the molding aid exactly, which is usually already the case is predetermined by the contour of the tool or the workpiece to be shaped.

at a normal punching process in which the tool is used by only one Penetrates into the material strip, it may be enough Lubricant along the contour only on one side of the material strip applied. In many cases however, it will be advisable to run the lubricant along both sides of the Apply the contour to the material strip, if possible accurate and in position with the corresponding tool parts.

When the lubricant is applied to the material strip of minor importance. In one embodiment of the invention is designed to remove the lubricant itself during the molding process to apply to the strip of material. For example. could be a corresponding tool Device assigned to the lubricant when lowering of the tool on the material strips on the latter by spraying or Syringes. For example, could corresponding in the tool or an upstream device, fine nozzles, which are similar the inkjet printer or a single or multi-row spray bar with nozzles arranged side by side are provided, which is the workpiece contour to be formed record with a certain knitting thickness. Then are preferred Amount and duration of these nozzles freely programmable, keeping the points larger or smaller could be.

In another embodiment of the invention, however, is the molding aid before the molding process even applied to the strip of material. This can also be done by spray or syringes or drops happen. But it can also go through rolled up or printed on. This can cause the lubricant can be restricted to the contour of the workpiece to be formed relatively precisely, so that a very effective quantity and consumption optimized as a result, cost-saving order process is offered.

Conceivable is also that on the cylinder surface of the Stamp a punching or fineblanking tool a structured one surface is present in which the molding aid is stored for the purpose of forming a depot can. The cylinder can therefore have a pore-shaped structure on the surface or have an "orange peel".

In the method according to the invention, there is the possibility of using the carrier oil as the carrier medium for the ad necessary during the molding process to avoid additives entirely or to reduce the proportion, since the additives can also be applied directly to the material strip. Such an additive cocktail would be entirely sufficient, particularly in the case of preferred fine cutting. Subsequent cleaning of the manufactured workpieces is thus unnecessary or at least simplified.

Otherwise, can but the necessary lubricant or additive cocktail in all possible forms and conditions are applied to the material strip, for example also as a paste or as a solid lubricant. When printing, for example, a corresponding one Paper or the like can be used, to which the lubricant is admixed is. Here are many options conceivable, which should be encompassed by the present invention.

Claims (8)

Method for shaping workpieces from a material strip using a shaping aid by means of a tool which at least partially or completely penetrates the material strip along a contour, characterized in that a shaping aid only or is inserted along the contour of the workpiece to be shaped before the workpiece is shaped is applied to the material strip on both sides. A method according to claim 1, characterized in that the molding aid on both sides, along the contour on the Strips of material is applied. A method according to claim 1 or 2, characterized in that that the molding aid during the Forming process is applied to the material strip. Method according to one of claims 1 to 3, characterized in that that the molding aid goes directly from the tool onto the material strip the contour is attached. Method according to at least one of claims 1 to 4, characterized in that part of the tool, for example a stamp, a surface structure has, in which at least part of the molding aid is added becomes. A method according to claim 1 or 2, characterized in that that the molding aid in a work cut before molding is applied to the material strip. Method according to one of claims 1 to 6, characterized in that that the molding aid along the contour of the to be molded workpiece rolled onto the material strip, printed on or freely programmable by means of spray nozzles in Line thickness and application thickness or as a series of dots with variable point Size and thus variable auxiliary form content is applied. Method according to at least one of claims 1 to 7, characterized in that a workpiece from the strip of material in the fineblanking process is cut out.