Ultra-precise sheet metal parts and assemblies – from laser cutting and punching to bending, laser welding and laser engraving.
Prothmann GmbH
Gröbenzell (near Munich)New on Amplifa
About Prothmann
Prothmann GmbH, based in Gröbenzell near Munich, has been active in sheet metal processing for over 50 years, manufacturing demanding sheet metal parts and assemblies from prototype to large-scale production. The service portfolio includes laser cutting, CNC punching, laser-punch combination parts, bending, laser welding, laser engraving as well as complete assembly with processes such as press-fitting, riveting, screwing, bonding, welding and brazing. Production is performed on an AMADA EML2550AJ laser-punch combination machine with fiber laser technology, which processes sheet thicknesses from 0.1 to 6 mm with an accuracy of 0.01 mm. The material warehouse stocks steels such as DC01 and St37, stainless steels such as 1.4301 and 1.4404, aluminum alloys such as AlMg3, and exotic materials such as copper, brass, CuBe, Mu-metal and Invar. Customers come from the electronics, automotive and aerospace industries, mechanical engineering, and medical and food technology. In addition, the company offers toolmaking, design and feasibility consulting as well as heat treatment of bent parts.
- Site
- Gröbenzell
- Processes
- Laser cutting, CNC punching, Laser-punch combination, Countersinks, thread embossing, thread extrusions, small formings (in punching process), Bending/folding (air bending, coining, step bending, radius bending, cone and free-form bending), Laser welding (laser beam welding, with or without filler wire, on rotary axis), Laser engraving (annealing, color change, depth engraving), Assembly/final assembly
- Materials
- Mild steel St37, DC01 steel, Stainless steel 1.4301 V2A, 1.4310 spring steel, 1.4404 V4A, 1.4751 V4A, 1.4016 sheet metal, Aluminum AlMg3
- Certificates
- ISO certification (processes, details unspecified), ISO certification (processes)
- Industries
- Electronics industry, Automotive industry, Mechanical engineering, Medical technology, Aerospace, Food industry
- 01
Design and feasibility consulting
- 02
Toolmaking (in-house special tools)
- 03
Laser cutting / CNC punching / laser-punch combination
- 04
Bending/folding
- 05
Laser welding / welding / brazing
- 06
Laser engraving / marking
- 07
Heat treatment
- 08
Assembly and final assembly
Sites
Gröbenzell
DEHeadquarters / Production
- Lot size
- Prototype to large series
- Materials
- Steel, stainless steel, aluminum, copper, brass, CuBe, Mu-metal, Invar, titanium
- AMADA EML2550AJ laser-punch combination machine (fiber laser, 0.15 mm laser beam, 0.1–6 mm sheet thickness)
- Press brakes (bends 1–500 mm)
- CNC-controlled laser welding machine with rotary axis
- Laser engraving machine (6–150 cm/min)
- Hardening furnace
Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Laser cuttingCutting/laser beam cutting | 0.01 mm accuracy | – | – | – | 1.4301, 1.4310, 1.4404, 1.4751, 1.4016, DC01, St37, AlMg3, AlSi, Al99, Copper, Brass, CuBe, Mu-metal, Invar |
| CNC punchingForming/punching technology | 0.01 mm | – | – | – | 1.4301 V2A, DC01, St37, Aluminum |
| Laser-punch combinationCutting/forming combined | Hundredths of a millimeter range | – | – | 10,000 pieces (small series up to) | Aluminum, 1.4301, Steel, Copper |
| Countersinks, thread embossing, thread extrusions, small formings (in punching process)Forming | – | – | – | – | 1.4301 V2A |
| Bending/folding (air bending, coining, step bending, radius bending, cone and free-form bending)Forming | – | 1 mm to approx. 500 mm (bends) | – | – | CuBe, Aluminum, Steel, Stainless steel |
| Laser welding (laser beam welding, with or without filler wire, on rotary axis)Joining | – | – | – | – | Steel, Stainless steel, Aluminum, Copper, MU-metal, Titanium |
| Laser engraving (annealing, color change, depth engraving)Surface/marking | – | – | – | – | Stainless steel, Aluminum (anodized) |
| Assembly/final assemblyAssembly | – | – | – | – | – |
| Press-fit fasteners (press-in nuts, threaded studs, bushings, blind bushings)Assembly/joining | – | – | – | – | – |
| TIG weldingJoining | – | – | – | – | – |
| MAG weldingJoining | – | – | – | – | – |
| Spot weldingJoining | – | – | – | – | – |
| BrazingJoining | – | – | – | – | – |
| Riveting (orbital riveting, pop riveting)Joining | – | – | – | – | – |
| Screw connectionsAssembly/joining | – | – | – | – | – |
| Adhesive bonds and labelsJoining/assembly | – | – | – | – | Aluminum |
| Toolmaking (in-house special tools)Engineering | – | – | – | – | – |
| Design and feasibility consultingEngineering | – | – | – | – | – |
| Hardening/age hardening in hardening furnace (for bent parts)Heat treatment | – | – | – | – | CuBe |
5 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Laser-punch combination machine with fiber laser technology | AMADA EML2550AJ | – | Laser beam 0.15 mm; sheet thicknesses 0.1–6 mm | – | Gröbenzell (near Munich) |
| Press brakes | – | – | Bends 1 mm to approx. 500 mm | – | Gröbenzell |
| CNC-controlled laser welding machine | – | – | with rotary axis, with/without filler wire | – | Gröbenzell |
| Laser engraving machine | – | – | Process speed 6–150 cm/min | – | Gröbenzell |
| Hardening furnace | – | – | – | – | Gröbenzell |
Additional services
Quality
ISO-certified processes, continuous quality controls and machine axes regularly calibrated to micrometer accuracy ensure the dimensional accuracy of the components.
| Evidence | Gröbenzell |
|---|---|
| ISO certification (processes) |
History
- ca. 1970er
Founding – over 50 years of experience in sheet metal processing
Investment in the AMADA EML2550AJ laser-punch combination machine with fiber laser technology