Machining, friction welding and assembly of components for drilling systems in special geotechnical engineering
BOHRMA Maschinenbau Martin Himmelmann
Fulda · GermanyNew on Amplifa
About BOHRMA
BOHRMA Maschinenbau Martin Himmelmann is a mechanical engineering company in Fulda that manufactures components for drilling systems used in special geotechnical engineering, including drill bits and drill rods for earthworks and tunneling. The service portfolio includes 5-axis CNC milling, CNC turning, CNC oxy-fuel and plasma cutting, CNC sawing up to Ø 320 mm, deep-hole drilling of rotationally symmetric workpieces, friction welding with subsequent heat treatment of the weld seam, as well as welding, brazing and assembly services. In addition to contract manufacturing, the company develops and manufactures special components as a turn-key solution. At the Fulda site (Industriepark West), 40 employees work in two-shift operation. The management system is certified to DIN EN ISO 9001; an energy audit was carried out in 2021. The company delivers nationally and internationally.
- Site
- Fulda
- Processes
- 5-axis CNC milling, CNC turning, CNC oxy-fuel and plasma cutting, CNC friction welding (rotationally symmetric workpieces Ø 60.3 mm to Ø 219.1 mm, max. 8700 mm²), Heat treatment of the weld seam (after friction welding), Deep-hole drilling (rotationally symmetric workpieces), CNC sawing, Welding
- Materials
- 5-axis CNC milling, CNC turning, CNC oxy-fuel and plasma cutting, CNC friction welding, Deep-hole drilling, Heat treatment
- Certificates
- DIN EN ISO 9001:2015, ISO 9001
- Employees
- 40
- Industries
- Special geotechnical engineering (earthworks and tunneling), Mechanical engineering, Special geotechnical engineering (drilling technology for earthworks and
- 01
CNC sawing up to Ø 320 mm
- 02
CNC oxy-fuel and plasma cutting
- 03
5-axis CNC milling
- 04
CNC turning
- 05
Deep-hole drilling
- 06
Friction welding
- 07
Heat treatment of the weld seam
- 08
Welding/brazing
- 09
Assembly
Processes and Manufacturing Areas
5-axis CNC milling
Machining of workpieces up to X=750 mm, Y=600 mm, length 500 mm.
CNC turning
Machining with a working range of X=3000 mm, Y=1500 mm at a thickness up to 100 mm.
CNC oxy-fuel and plasma cutting
Cutting of sheets up to 100 mm thickness in formats of 3000 × 1500 mm.
CNC friction welding
Joining of rotationally symmetric workpieces Ø 60.3 to 219.1 mm with max. 1300 kN upset force.
Deep-hole drilling
Drilling of rotationally symmetric workpieces with lengths of 1000 to 2000 mm.
Heat treatment
Heat treatment of the weld seam after friction welding.
Location
Fulda
DEProduction (Industriepark West), two-shift operation
- Materials
- Steel, stainless steel, aluminum, cast
- 5-axis CNC milling machine (X=750 mm, Y=600 mm, L=500 mm)
- CNC lathe (X=3000 mm, Y=1500 mm, thickness 100 mm)
- CNC oxy-fuel and plasma cutting system (X=3000 mm, Y=1500 mm)
- CNC friction welding machine (Ø 60.3–219.1 mm, 1300 kN)
- CNC saw (up to Ø 320 mm)
Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| 5-axis CNC millingMachining | – | 500 mm × 600 mm × 750 mm | – | – | – |
| CNC turningMachining | – | 3000 mm × 1500 mm | – | – | – |
| CNC oxy-fuel and plasma cuttingMachining | – | 3000 mm × 1500 mm | – | – | – |
| CNC friction welding (rotationally symmetric workpieces Ø 60.3 mm to Ø 219.1 mm, max. 8700 mm²)Joining | – | 640 mm | – | – | – |
| Heat treatment of the weld seam (after friction welding)Heat treatment | – | – | – | – | – |
| Deep-hole drilling (rotationally symmetric workpieces)Machining | – | 1000 mm to 2000 mm | – | – | – |
| CNC sawingMachining | – | Ø 320 mm | – | – | – |
| WeldingJoining | – | – | – | – | – |
| BrazingJoining | – | – | – | – | – |
| Assembly servicesAssembly | – | – | – | – | – |
| Manufacture of components for drilling systems for special geotechnical engineering (drill bits,Machining | – | – | – | – | – |
5 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| 5-axis CNC milling machine | – | – | X=750mm, Y=600mm, length: 500mm | – | Fulda |
| CNC friction welding machine | – | – | Ø 60.3 mm to Ø 219.1 mm, max. 8700 mm² friction welding area, upset force 1300 kN, overall length | – | Fulda |
| CNC lathe | – | – | X=3000mm, Y=1500mm, thickness: 100mm | – | Fulda |
| CNC oxy-fuel and plasma cutting system | – | – | X=3000mm, Y=1500mm, thickness: 100mm | – | Fulda |
| CNC saw | – | – | up to Ø 320 mm | – | Fulda |
Additional services
Quality
The management system is certified to DIN EN ISO 9001:2015; the scope covers the manufacture of turned and milled parts, subassembly assembly and welding technology. An energy audit was carried out in 2021.
| Evidence | Fulda |
|---|---|
| ISO 9001 |
History
- 2015
Initial certification of the management system to DIN EN ISO 9001 by Intertek on 30.12.2015
- 2018
Recertification to DIN EN ISO 9001:2015, certificate issued on 14.09.2018
- 2021
Energy audit 2021