Special-purpose machine building and broaching tools for broaching turbine and brake parts
HOFFMANN Räumtechnik GmbH
Pforzheim (Gymnasiumstrasse 150)New on Amplifa
Company
HOFFMANN Räumtechnik GmbH, headquartered in Pforzheim, specializes in broaching technology: a chip-forming manufacturing process with geometrically defined cutting edges used to produce internal and external contours in high-volume and mass production as well as in single-part and small-batch manufacturing. The company builds broaching machines of the internal, external and special broaching machine types as well as internal, external and special broaching tools, and offers contract sharpening of broaching tools. Core competencies are the broaching of turbine and compressor disks for aircraft engines and stationary gas turbines as well as the broaching of brake carriers and brake parts in the automotive industry; steering racks, gears and rib plates are also broached. Broaching tools are made predominantly from high-speed steel (HSS); coated HSS, carbide and powder-metallurgical steels are also used. Since 2004, the company has belonged as a competence center to the parent companies ARTHUR KLINK GmbH and KARL KLINK GmbH. Customers include Opel, Volkswagen, Daimler-Benz, Siemens, GM and Daewoo.
- Site
- Pforzheim
- Processes
- Internal broaching, External broaching, Broaching of turbine and compressor disks (blade root attachment profiles), Broaching of brake carriers/brake parts, Broaching of steering racks, Soft and hard broaching of gears, Chain broaching of rib plates (rail fastening plates), Manufacture of broaching tools (internal, external and special broaching tools)
- Materials
- High-speed steel (HSS), Carbide, Powder-metallurgical steels
- Certificates
- Quality management system (QM certificate 2024)
- Founded
- 1938
- Industries
- Turbine industry (aircraft engines, stationary gas turbines), Automotive (brake parts/brake carriers, steering), Automotive supply industry, Power generation, Railroad construction (rib plates), Automotive (brake parts/brake carriers)
- 01
Design and project engineering of individual system solutions
- 02
Manufacture of broaching machines (internal, external, special broaching
- 03
Manufacture of broaching tools (HSS, carbide, powder-metallurgical steels)
- 04
Contract sharpening of broaching tools
- 05
Service and support
Materials and Processes
High-speed steel (HSS)
Standard cutting material for broaching tools at cutting speeds below 30 m/min, also usable coated.
Carbide
Cutting material for specific machining tasks and broaching tools with screwed or brazed carbide inserts.
Powder-metallurgical steels
Cutting material increasingly used for highly stressed broaching tools.
Locations
Pforzheim
DEHeadquarters / administration and production
- Materials
- High-speed steel (HSS), carbide, powder-metallurgical steels
- Horizontal surface broaching machine RAWX 16x2500x500
- Vertical surface broaching machines
- Lift-table broaching machines
- Chain broaching machines
- Special broaching machines
- Sharpening machines (contract sharpening)
Components and Machines
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Internal broachingMachining | – | – | – | – | – |
| External broachingMachining | – | – | – | – | – |
| Broaching of turbine and compressor disks (blade root attachment profiles)Machining | – | 2400 mm diameter | 8.5 tonnes | – | – |
| Broaching of brake carriers/brake partsMachining | – | – | – | – | – |
| Broaching of steering racksMachining | – | – | – | – | – |
| Soft and hard broaching of gearsHeat treatment | – | – | – | – | – |
| Chain broaching of rib plates (rail fastening plates)Machining | – | – | – | – | – |
| Manufacture of broaching tools (internal, external and special broaching tools)Engineering | – | – | – | – | High-speed steel (HSS), Carbide, powder-metallurgical steels |
| Contract sharpening of broaching toolsMachining | – | – | – | – | – |
6 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Horizontal surface broaching machine | HOFFMANN Räumtechnik RAWX 16x2500x500 | – | – | – | Pforzheim |
| Vertical surface broaching machine | HOFFMANN Räumtechnik | – | for turbine disks up to 2400 mm diameter and 8.5 t | 1993 | – |
| Lift-table broaching machine | HOFFMANN Räumtechnik | – | – | – | – |
| Chain broaching machine | HOFFMANN Räumtechnik | – | – | – | – |
| Special broaching machine | HOFFMANN Räumtechnik | – | – | – | – |
| Broach transfer line | HOFFMANN Räumtechnik | – | – | 1956 | – |
Additional services
Reference customers
Quality
A quality management system certificate is available (image of QM certificate, as of 2024-01-06); details on the standard cannot be derived from the sources.
| Evidence | Pforzheim |
|---|---|
| Quality management system (QM certificate 2024) |
History
- 1938
Company founded by Kurt Hoffmann; product range: broaching tools
- 1950
Product range expanded to include broaching machines
- 1956
Breakthrough into special-purpose machine building with delivery of the first broach transfer line for shift rods to Adam Opel AG
- 1967
Equipping of Volkswagen AG's joint production with 13 broaching machines
- 1979
Delivery of 12 chain broaching machines and 12 sharpening machines each for broaching rib plates for the Baikal-Amur Railway in Russia
- 1981-1987
Equipping of joint production at Daimler-Benz with 15 broaching machines
- 1985
First NC-controlled horizontal surface broaching machine with 5 NC axes for broaching turbine and compressor disks
- 1993
Vertical surface broaching machine with automatic tool changer and 8 NC axes for turbine disks up to 2400 mm diameter and 8.5 t
- 1995
Delivery of the 100th broaching machine for brake production
- 1998
Expansion of the production program to include lift-table broaching machines with hydraulic drive
- 1998-1999
Delivery of the world's largest vertical surface broaching machine for turbine and compressor disks to Siemens, Berlin
- 2003
Delivery of 6 lift-table broaching machines for soft and hard broaching of gears to GM
- 2004
Acquisition by ARTHUR KLINK GmbH and KARL KLINK GmbH; founding of LAPOINTE GmbH and HOFFMANN Räumtechnik GmbH as competence centers
- seit 2005
Delivery of 8 horizontal and 5 vertical surface broaching machines to gas turbine manufacturers worldwide