Design, machining, welding, 3D printing and assembly of custom jigs and systems from Dortmund
GroMA GmbH
Dortmund (Beratgerstraße 36)New on Amplifa
About GroMA GmbH
GroMA GmbH, based in Dortmund, is a mechanical engineering company with a design office, workshop and assembly and service center at Beratgerstraße 36. Its service portfolio includes 3D design including strength analysis (FEM), drawing creation and feasibility studies as well as the manufacture of individual parts and assemblies through milling, turning, EDM and grinding. The company also offers sheet metal processing by laser and waterjet cutting, welded constructions with stress-relief annealing of welded frames, hardening treatments and surface finishing through painting, anodizing, chromating and nickel plating. Industrial 3D printing with continuous glass fiber-reinforced Onyx complements the portfolio. Materials include aluminum (5083, 7075), steel, stainless steel, titanium and plastics. In the assembly and service center, systems are assembled, set up for pre-acceptance, commissioned on site and maintained; this is complemented by risk analyses according to DIN EN 12100, CE assessments and documentation. Customers come from mechanical engineering, the pipeline industry, automotive electronics, testing technology, rail, automation, airport technology, food production and research.
- Site
- Dortmund
- Processes
- Milling, Turning, EDM, Grinding, Manufacture of complex parts to 3D model contours, Welded constructions, Stress-relief annealing of welded frames, Laser and waterjet cutting (sheet metal processing)
- Materials
- Aluminum 5083, Aluminum 7075, Steel, Stainless steel, Titanium, Plastic, 42CrMo4, Onyx (3D printing)
- Certificates
- Risk analysis DIN EN 12100, CE assessment / EU declaration of incorporation, Quality records for repairs
- Industries
- Mechanical engineering, Pipeline industry, Automotive electronics/lighting systems, Testing technology, Railway/commuter rail, Automation
- 01
Idea generation and consulting
- 02
3D design, FEM analysis, drawing creation
- 03
Machining (milling, turning, EDM, grinding)
- 04
Sheet metal processing (laser/waterjet cutting), welding, annealing, hardening
- 05
Surface finishing (painting, anodizing, chromating, nickel plating)
- 06
3D printing
- 07
Assembly, on-site installation and commissioning
- 08
Repair/maintenance, risk analysis, CE conformity, documentation
Materials and Processes
Aluminum 5083
Aluminum alloy for machined parts and assemblies.
Aluminum 7075
High-strength aluminum alloy for stressed jig parts.
Steel
Base material for welded constructions, sheet metal parts and hardened components.
Stainless steel
Used in sheet metal processing, welded constructions and machining.
Titanium
Machined in machining for demanding applications.
42CrMo4
Heat-treatable steel for hardening treatments with the required hardening processes.
Plastic
Machining and replacement of plastic parts, also in 3D printing.
Onyx (3D printing)
Composite material with continuous glass fiber reinforcement for precise parts with a first-class surface finish.
Locations
Dortmund
DEHeadquarters with design office, workshop and assembly and service center
- Materials
- Aluminum 5083/7075, steel, stainless steel, titanium, plastic
- 3D printers with continuous glass fiber reinforcement (build volume X320 × Y152 × Z154 mm)
- Milling, turning, EDM and grinding equipment
- Laser and waterjet cutting
- Welding, annealing and hardening capacity
- Surface treatment (painting, anodizing, chromating, nickel plating)
Parts and References
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| MillingMachining | – | – | – | – | Aluminum 5083, Aluminum 7075, Steel, Stainless steel, Titanium, Plastic |
| TurningMachining | – | – | – | – | Aluminum 5083, Aluminum 7075, Steel, Stainless steel, Titanium, Plastic |
| EDMMachining | – | – | – | – | Steel, Stainless steel |
| GrindingMachining | – | – | – | – | Aluminum 5083, Aluminum 7075, Steel, Stainless steel, Titanium, Plastic |
| Manufacture of complex parts to 3D model contoursMachining | – | – | – | – | Aluminum 5083, Aluminum 7075, Steel, Stainless steel, Titanium, Plastic |
| Welded constructionsJoining | – | – | – | – | Steel, Stainless steel, Aluminum |
| Stress-relief annealing of welded framesHeat treatment | – | – | – | – | Steel |
| Laser and waterjet cutting (sheet metal processing)Machining | – | – | – | – | Steel, Stainless steel, Aluminum |
| Hardening (e.g. 42CrMo4) with required hardening processesHeat treatment | – | – | – | – | Steel 42CrMo4 |
| PaintingSurface | – | – | – | – | – |
| Anodizing (also colored)Surface | – | – | – | – | Aluminum |
| ChromatingSurface | – | – | – | – | – |
| Nickel platingSurface | – | – | – | – | – |
| Industrial 3D printing (with continuous glass fiber reinforcement, Onyx)Additive | – | 320 mm × 152 mm × 154 mm | – | – | Plastic (Onyx) |
| Assembly of jigs/systems, on-site installation and commissioningAssembly | – | – | – | – | – |
| Repair/maintenance of jigs and machines (on site and in the workshop)Assembly | – | – | – | – | – |
| 3D design, strength analysis (FEM), drawing creationEngineering | – | – | – | – | – |
| Risk analysis according to DIN EN 12100, CE conformity/EU declaration of incorporationEngineering | – | – | – | – | – |
1 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| 3D printer (composite, continuous glass fiber) | – | – | X320 Y152 Z154 mm | – | Dortmund |
Additional services
Reference customers
Quality and Documentation
Every working and assembly step is inspected and documented; designs are documented upon delivery. Risk analyses are performed according to DIN EN 12100, including preparation of CE assessments and issuance of CE conformity or the EU declaration of incorporation.
| Evidence | Dortmund |
|---|---|
| Risk analysis DIN EN 12100 | |
| CE assessment / EU declaration of incorporation | |
| Quality records for repairs |