Question 1

What is prototype development?

Accepted Answer

Prototype development refers to the technical implementation of a design into a physical component that can be tested, modified, and used for further stages of development. For metal parts, this involves much more than just manufacturing. MEKU combines prototype construction, design, tool construction, and manufacturing. This allows for the joint evaluation of geometry, material, joints, function, and future manufacturability. The goal is to achieve a robust development stage from which further prototypes, a pre-production run, or mass production can be derived.

Question 2

How does prototype development speed up the product design process?

Accepted Answer

Prototype development shortens the development process because technical assumptions can be tested early on using an actual component. This allows designers to identify, for example, problematic geometries, unfavorable joint locations, or changes necessary for cost-effective manufacturing. At MEKU, projects benefit from close collaboration between design, prototype manufacturing, Tool construction, and metalworking. This allows changes to be incorporated early into the next production stage before more complex tools are created or larger production runs begin.

Question 3

Which prototype development methods are suitable for metal products?

Accepted Answer

For metal products, the appropriate method depends on the material, geometry, quantity, and the desired purpose of the prototype. For sheet-metal-based metal prototypes, MEKU employs methods such as laser cutting, punching, bending, forming, and welding.

If the prototype is to be used to assess future manufacturability, production processes similar to those used in series production are particularly useful. Our in-house tool construction department can additionally provide fixtures or tools if required for shaping or assembly.

Question 4

What technologies are used in prototype development?

Accepted Answer

MEKU relies on digital design and in-house metal fabrication for prototype development. Our design engineers work with Autodesk Inventor and AutoCAD Mechanical. IGES, STEP, and DXF are available as interfaces for external design data.

Depending on the component, manufacturing processes such as stamping, laser cutting, forming, edge folding, and welding can be employed. In its in-house tool construction department, MEKU manufactures production tools and fixtures using CAD/CAM-supported CNC machines. I have deliberately omitted 3D printing from the list of MEKU’s proprietary technologies, as no reliable evidence of in-house production could be found in the reviewed technical documentation.

Question 5

What materials are used in prototype development?

Accepted Answer

The choice of material is based on the mechanical, thermal, and corrosive stresses it will be subjected to later. For metal prototypes, MEKU processes, among other materials, stainless steel, structural steel, aluminum, copper, brass, as well as high-alloy and high-temperature-resistant steels. Nickel-based materials are also mentioned in the context of metalworking.

To ensure a meaningful prototype, a material with behavior comparable to that of the eventual production part should be used whenever possible. Only then can formability, weldability, and functional properties be realistically assessed.

Question 6

What is the process for prototype development of a metal component?

Accepted Answer

Our prototype development begins with the functional requirements and the available design data. Our experts then review the geometry, materials, tolerances, interfaces, and the planned manufacturing steps. This is followed by design coordination, material selection, prototype manufacturing, and technical testing. Any deviations identified are incorporated into the next iteration. Once the development stage is robust, further planning can be geared toward near-production prototypes, pre-series production, or series production.

Question 7

What information does MEKU need to build a prototype?

Accepted Answer

To ensure reliable prototype production, we need as complete a set of specifications as possible regarding geometry and function. This includes drawings or CAD data, material, desired quantity, function-related tolerances, surface requirements, loads, joints, and interfaces with adjacent components. For digital data, MEKU supports formats such as STEP, IGES, and DXF, among others. Additional information regarding the intended application and particularly critical features helps our design engineers properly plan the manufacturing process as early as the technical review stage.

Question 8

What manufacturing processes are used for sheet metal prototypes?

Accepted Answer

For sheet metal prototypes, MEKU can combine laser cutting, punching, bending, edge forming, forming, and welding, depending on the geometry and material. Downstream processing steps such as deburring and surface finishing can also be integrated into the production sequence. These processes are particularly useful when a prototype needs to be produced under conditions similar to those of a future production part. This allows for early evaluation of bend radii, welding sequences, dimensional changes, and assembly interfaces.

Question 9

What is the difference between a prototype, a functional model, and an initial sample?

Accepted Answer

A prototype is generally used to test a design or technical solution in practice before mass production. A functional prototype focuses more on whether the intended function is achieved under defined conditions. The appearance and final manufacturing process do not yet have to fully correspond to the eventual product.

A first prototype, on the other hand, is typically produced under specified or near-production manufacturing conditions. It is used to verify whether the drawing, material, dimensions, and defined quality characteristics can be consistently met.

Question 10

How is a prototype tested for suitability for mass production?

Accepted Answer

When assessing suitability for mass production, function and manufacturability are considered together. This includes dimensional accuracy, tolerance chains, material behavior, joints, assembly accessibility, and the question of whether critical features can be reliably inspected.
It must also be determined whether tools,

fixtures, and manufacturing sequences are suitable for achieving repeatable results. In prototype engineering, therefore, changes should not only improve the individual prototype but also enable a stable production process later on.

Question 11

Can prototypes be transitioned directly to pre-production or mass production?

Accepted Answer

Yes, once the function, geometry, material, and manufacturability have been sufficiently validated, a development stage can be used for pre-series production or to prepare for series production. Whether an additional intermediate step is necessary depends on the component and the technical requirements.

With its design department, in-house tool construction, and metal fabrication, MEKU has the key process steps required for this transition. For stamping & laser processing, MEKU documents production from batch size 1 through to series production.

Question 12

What are the possible production quantities for prototype manufacturing?

Accepted Answer

The number of parts produced in prototype manufacturing depends on the manufacturing process and the component’s intended use. A single part may be sufficient for initial geometric or functional testing. For assembly trials, stress tests, or statistical comparisons, it may be advisable to produce multiple identical components. For stamping & laser processing, MEKU explicitly offers manufacturing from batch size 1 up to series production. This allows even small quantities to be produced within the existing manufacturing structure.

Question 13

What tolerances can be achieved for metal prototypes?

Accepted Answer

A one-size-fits-all tolerance for all metal prototypes would not be technically sound. Achievable values depend on the material, material thickness, geometry, component size, forming, and manufacturing process. For stainless steel sheet metal processing, for example, MEKU specifies typical length and width tolerances of approximately 0.2 to plus/minus 0.5 millimeters. For structural steel, tolerances of plus/minus 0.2 to plus/minus 0.4 millimeters are specified, and for aluminum, plus/minus 0.2 to plus/minus 0.5 millimeters. In addition, MEKU applies ISO 2768-m or ISO 2768-f unless otherwise specified. Nevertheless, the project-specific tolerance must be technically verified for each component.

Question 14

How long does it take to make a prototype?

Accepted Answer

Without component data, it is not possible to provide a reliable general estimate of the time required to manufacture a prototype. The key factors include geometry, material availability, required tooling, quantity, manufacturing process, welding requirements, and the scope of testing.

Short communication channels between design, prototype production, tool construction, and manufacturing can reduce the need for coordination. After reviewing your drawings and technical requirements, MEKU can determine the specific scope of production and provide a realistic timeline.

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Questions and answers on the subject of prototype development