Custom made part

As a part of the drawing, the metal and plastic processing industry describes a custom production. Drawing parts are produced individually for a customer, using a variety of Production methods Turning over milling to punching and pressing.
In industry, drawing parts are particularly relevant for special applications. If the customer cannot rely on a standardized standard application for his application, he applies to a contractor that can supply the desired component as a part of the drawing. In addition to a drawing, a CAD file or a pattern can also serve as the basis for production.

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What is a part of the drawing?

The drawing part is also referred to as a special part and is characterized in that it is produced specifically according to the individual requirements of the customer. Drawing parts are required when no DIN or standard part with the desired technical properties is available on the market. This is especially the case when it comes to special products or assemblies with very specific requirements

the material (use of special materials)
the quality of surface processing (high tolerances)
the dimensions (standard deviations)
the hardness
corrosion resistance
the thread shape

or other technical characteristics. For example, prototypes are designed as a part of the drawing, since there is no standard part for the application at the time of production. In addition, however, small, medium and large series are often designed as a part of the drawing.

Drawing part - drawing and finished part

What to pay attention to when ordering parts?

The ordering of a drawing part differs considerably from the ordering of a standard workpiece due to the individual character of each workpiece. Since there are no standardised standards for drawing parts, a close coordination between the customer and the exporting manufacturing company is necessary during the development phase.

It is important to clarify the technical requirements on the customer side and to tune them to the performance of the machine park. If necessary, it is also necessary on the part of the supplier to first develop new tools for the desired custom production.

Drawing parts are usually more expensive than standard parts because of their individual character. However, the cost difference is relative in large series: the development of new tools or the creation of a CAD drawing is not so important.

Drawing part - CAD data and drawing at Magepa Feinmechanik GmbH

Typical products in drawingin parts

In principle, a drawing part can be any desired workpiece which deviates from the available DIN standards and technical standards. Typical products include:

Turning parts: During turning, the workpiece to be machined is clamped into a lathe and rotated. A chisel then moves towards the workpiece and brings it into the desired shape by chip removal. The turning of parts of the drawing takes place optionally on manual lathes (in prototype production) or on automated CNC machine tools (in series production).
Parts: When milling parts of the drawing, a milling cutter with a defined geometric contour is guided over the workpiece in such a way that chip is removed. The workpiece is thereby gradually brought into the desired shape.
Dance parts: During punching, a usually flat, thin workpiece (for example sheet metal) is clamped into a press. The press is equipped with a stamp which corresponds in shape and size to the desired hole. The press press presses the die through the sheet metal onto the die and thus creates a recess with a certain silhouette.
Welding constructions: These are usually steel constructions, which consist of different elements such as profiles, frames, pipes or sheets and perform a specific function. The various mechanical parts of a welded construction are permanently connected to each other using suitable welding methods such as the MIG or the WIG welding.

In addition to the drawing parts listed here, many further workpieces are also designed as a drawing part. These include, for example, extrusion parts, laser parts, bending parts, forming parts, screws or threads.

Drawing part Sonnenrad - Company TME Maschinenbau GmbH

The materials processed in the case of parts of the drawing include all common materials of the metal processing industry such as steel (normal steel, spring steel, stainless steel, tool steel), copper, aluminum or brass. In addition, however, special materials such as nymonic or titanium are also processed. The production according to a drawing is also customary in the plastics industry and in other areas.

What are the challenges in manufacturing?

The essential challenge in the production of parts of the drawing is that there are no technical standards and standards for the required workpieces. For this reason, the construction and technical design of the workpiece are of great importance. Here it is important to find the most cost-effective method for manufacturing the component in close coordination between customers and manufacturers.

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