Manufacture of precision drop-forged parts from splitting through heat treatment to machining
Gebr. Hartkopf GmbH & Co. KG
Solingen (Bismarckstr. 18–26)New on Amplifa
About Gebr. Hartkopf
Gebr. Hartkopf is a forging company in Solingen that specialises in precision drop-forged parts. Its value chain covers design, in-house toolmaking, splitting of bar steel, drop forging on belt drop hammers and a hydraulic hammer, deburring, heat treatment, shot blasting, sizing/calibration, as well as machining and inspection. The main materials used are C45, C60 and 31CrV3. Originally the company produced blanks for knives and later blanks for scissors; today it supplies customers from a wide variety of industries, including manufacturers of pliers and professional-grade hand tools. By sizing/calibration, the forging tolerance of 0.4 mm is reduced to 0.1 to 0.2 mm depending on customer requirements.
- Site
- Solingen
- Processes
- Design, Toolmaking, Splitting, Forging (drop forging on belt drop hammers and hydraulic hammer), Deburring (cold and hot), Heat treatment (normalising in continuous furnace, annealing in chamber gas furnace), Shot blasting, Sizing/Calibration
- Materials
- C45, C60, 31CrV3
- Certificates
- Documented sampling inspection
- Industries
- Hand tool industry, Mechanical engineering
- 01
Design
- 02
Toolmaking
- 03
Splitting
- 04
Forging
- 05
Deburring
- 06
Heat treatment
- 07
Shot blasting
- 08
Sizing/Calibration
- 09
Machining
- 10
Inspection
- 11
Shipping
Materials & Processes
C45
Unalloyed steel as the main material for forged blanks.
C60
Steel material for drop-forged parts with higher strength.
31CrV3
Quenched and tempered steel for highly stressed forged parts such as hand tools.
Sites
Solingen
DEProduction site
- Materials
- C45, C60, 31CrV3
- Belt drop hammer
- Hydraulic hammer
- Continuous furnace (heat treatment)
- Chamber gas furnace
- Shot blasting system
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| DesignEngineering | – | – | – | – | – |
| ToolmakingEngineering | – | – | – | – | – |
| SplittingForming | – | approx. 6-7 metres (bar steel) | – | – | C45, C60, 31CrV3 |
| Forging (drop forging on belt drop hammers and hydraulic hammer)Forming | Thickness tolerance 0.4 mm | – | – | – | Steel grades (various), C45, C60, 31CrV3 |
| Deburring (cold and hot)Forming | – | – | – | – | – |
| Heat treatment (normalising in continuous furnace, annealing in chamber gas furnace)Heat treatment | – | – | – | – | – |
| Shot blastingSurface | – | – | – | – | – |
| Sizing/CalibrationForming | 0.1 mm – 0.2 mm (thickness tolerance, depending on customer | – | – | – | – |
| MachiningMachining | – | – | – | – | – |
| Inspection (documented sampling inspection during ongoing production)Testing | – | – | – | – | – |
5 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Belt drop hammer | – | – | – | – | Solingen |
| Hydraulic hammer | – | – | – | – | Solingen |
| Continuous furnace (heat treatment) | – | – | – | – | Solingen |
| Chamber gas furnace | – | – | – | – | Solingen |
| Shot blasting system | – | – | – | – | Solingen |
Quality
During ongoing production, a documented sampling inspection is generally carried out.
| Evidence | Solingen |
|---|---|
| Documented sampling inspection |
History
- 1872
Foundation of the company by the brothers Carl and August Hartkopf.
Initial production of blanks for knives; later a shift in focus to blanks for scissors.
Further transformation towards hand tools and parts for general mechanical engineering.