Toolmaking for stamping and forming technology: planning, design, manufacturing, testing and maintenance from a single source.
Siebenwurst Werkzeugbau GmbH Zwickau
Zwickau (headquarters, manufacturing and design) · Eisenach (design office)New on Amplifa
About Siebenwurst Werkzeugbau
Siebenwurst Werkzeugbau GmbH Zwickau was founded in 1991 by Leonhard and Christian Siebenwurst in the former toolmaking operation of VEB Sachsenring and, as an owner-managed company, is a partner to the automotive industry and its suppliers. The company plans, designs and manufactures tools for all areas of stamping and forming technology – among others transfer die sets, deep-drawing and press tools, cutting tools for formed and tailored-blank blanks, tools for forming tubes and profiles, internal high-pressure forming tools (hydroforming) as well as punching fixtures for plastic and fibre-composite parts and deburring tools for aluminium castings. The value chain ranges from CAD data transfer through method planning, deep-drawing simulation, design and CAM programming to tool manufacturing, testing, sample approval and inspection in accordance with VDA. Materials include steel, high-strength sheet metal, aluminium, plastic and fibre composites. The main Zwickau site offers around 5,200 m² of production space with large-volume 5-axis gantry milling machines, a 40,000-kN combination press for external and internal high-pressure forming, and 3D coordinate measuring machines; a design office with 13 employees is located in Eisenach. Since 1993, the company has provided complete on-site tool service in the press shop of the Volkswagen plant in Saxony and also offers pre-series and small-series production, contract machining, 3D digitization, tool repair and breakdown service.
- Site
- Zwickau
- Processes
- Toolmaking stamping technology (transfer die sets, cutting/hole-punching tools), Toolmaking forming technology (deep-drawing and press tools), Tools for GT and cupping press lines, Cutting tools for formed blanks, Tools for tailored blank panels, Tools and systems for forming tubes and profiles, Internal high-pressure forming tools (hydroforming), Deburring tools for aluminium castings
- Materials
- Steel, High-strength sheet metal, Aluminium, Aluminium castings, Plastic, Fibre composite, Internal high-pressure forming, 5-axis gantry milling
- Certificates
- ISO 9001:2015, ISO 14001:2015, TISAX
- Founded
- 1991
- Industries
- Automotive industry and suppliers, Stamping and forming technology, Plastic and fibre-composite processing, Aluminium castings, Hydroforming
- 01
CAD data transfer and manufacturability analysis
- 02
Method planning, draw die assembly and deep-drawing simulation
- 03
Tool design
- 04
CAM programming
- 05
Tool manufacturing (CNC milling) and assembly
- 06
Tool testing on presses
- 07
Sample approval, inspection report and quality assurance
- 08
Tool maintenance, repair and on-site tool service
Materials and Processes
Steel
Base material for transfer die sets and deep-drawing, press and cutting tools of stamping and forming technology.
High-strength sheet metal
Materials for demanding 3D formed parts in automotive body engineering.
Aluminium
Material for formed parts and tools; the company manufactures deburring tools for aluminium castings.
Plastic
Material for pneumatic and hydraulic punching fixtures as well as cutting and hole-punching tools.
Fibre composite
Material for cutting, hole-punching and punching tools in lightweight construction.
Internal high-pressure forming
Process for tube and profile forming; commissioning of a 40,000-kN combination press in 2003.
5-axis gantry milling
Machining of large-volume tool elements with travel ranges up to 6.500 x 4.000 x 1.400 mm.
3D digitization
Contactless surface capture using a handheld scanner, also on site, with surface reconstruction in CATIA V5.
Sites
Zwickau
DEHeadquarters, manufacturing and design
- Lot size
- Pre-series and small series
- Materials
- Steel, high-strength sheet metal, aluminium, plastic, fibre composite
Eisenach
DEDesign office
Tools and Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Toolmaking stamping technology (transfer die sets, cutting/hole-punching tools)Forming | – | – | – | – | Steel, Aluminium, High-strength sheet metal |
| Toolmaking forming technology (deep-drawing and press tools)Forming | – | – | – | – | Steel, Aluminium, High-strength sheet metal |
| Tools for GT and cupping press linesForming | – | – | – | – | Steel, Aluminium, High-strength sheet metal |
| Cutting tools for formed blanksForming | – | – | – | – | Steel, Aluminium, High-strength sheet metal |
| Tools for tailored blank panelsForming | – | – | – | – | Steel, Aluminium, High-strength sheet metal |
| Tools and systems for forming tubes and profilesForming | – | – | – | – | Steel |
| Internal high-pressure forming tools (hydroforming)Forming | – | – | – | – | Steel |
| Deburring tools for aluminium castingsMachining | – | – | – | – | Aluminium castings |
| Pneumatic and hydraulic punching fixtures for plastic and fibre-composite partsForming | – | – | – | – | Plastic, Fibre composite |
| Cutting and hole-punching tools for plastic and fibre-composite partsForming | – | – | – | – | Plastic, Fibre composite |
| Milling (mechanical contract work)Machining | – | – | – | – | Steel, Aluminium |
| Drilling (mechanical contract work)Machining | – | – | – | – | Steel, Aluminium |
| Grinding (mechanical contract work)Machining | – | – | – | – | Steel, Aluminium |
| Tool manufacturing and assemblyAssembly | – | – | – | – | Steel, Aluminium |
| Tool designEngineering | – | – | – | – | – |
| Method planningEngineering | – | – | – | – | – |
| Draw die development and deep-drawing simulationEngineering | – | – | – | – | – |
| Forming simulationEngineering | – | – | – | – | – |
| Manufacturability analyses and method conceptsEngineering | – | – | – | – | – |
| Modification engineeringEngineering | – | – | – | – | – |
| CAM programmingEngineering | – | – | – | – | – |
| 3D digitization / laser scanningTesting | – | – | – | – | – |
| Quality control / initial sample inspection reports (VDA)Testing | – | – | – | – | – |
| Tool testing on pressesForming | – | – | – | – | – |
| Pre-series productionForming | – | – | – | – | – |
| Small-series manufacturingForming | – | – | – | – | – |
| Tool maintenance / repairs / breakdown serviceAssembly | – | – | – | – | – |
17 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| 5-axis gantry milling machine | Heyligenstaedt HEYNUMILL 3200-P | 1 | 6000 x 4000 x 1400 mm | – | Zwickau |
| 5-axis gantry milling machine | Heyligenstaedt HEYNUMILL-GANTRY 4000 | 1 | 6500 x 4000 x 1400 mm | – | Zwickau |
| 5-axis machining centre | DMG Mori Seiki DMU 270P | 1 | 2700 x 2700 x 1600 mm | – | Zwickau |
| 5-axis gantry milling machine | DMG Mori Seiki DMU 210P | 1 | 1800 x 2100 x 1250 mm | – | Zwickau |
| 5-axis machining centre (rotary table, swivel head) | DMG DMU 200P | 1 | 2000 x 1800 x 1100 mm | – | Zwickau |
| 5-axis machining centre (rotary/swivel table, round storage) | DMG DMC 85 RS6 | 1 | 935 x 850 x 650 mm | – | Zwickau |
| 5-axis machining centre (rotary table, swivel head) | DMG DMU 80 mono Block | 1 | 980 x 630 x 630 mm | – | Zwickau |
| 3-axis machining centre | DMG DMC 104V Linear | 1 | 1040 x 1000 x 500 mm | – | Zwickau |
| Boring mill | Fermat WFT 13 CNC | 1 | 3500 x 2500 x 1250 mm | – | Zwickau |
| Precision surface grinding machine | Okamoto PSG 84 UDX | 1 | 800 x 500 x 400 mm | – | Zwickau |
| External and internal cylindrical grinding machine | Paragon GUP 32x5 | 1 | Distance between centres 500, centre height 150 mm | – | Zwickau |
| Precision lathe | Harrison ALPHA 400 Plus | 1 | Distance between centres 1250, centre height 195 mm | – | Zwickau |
| Combination press for external and internal high-pressure forming as well as conventional use | – | 1 | – | – | Zwickau |
| 3D coordinate measuring machine SMM-C/RDS | Zeiss SMM-C/RDS | 1 | 3000 x 1600 x 2100 mm | – | Zwickau |
| 3D coordinate measuring machine | Stiefelmayer | 1 | 3000 x 1600 x 2100 mm | – | Zwickau |
| Optical 3D scanner | GOM Atos Triple Scan | 1 | – | – | Zwickau |
| Portable laser scanning device / handheld scanner | Steinbichler | 1 | – | – | Zwickau |
Additional services
Reference customers
Quality and Certifications
Tools leave the company only after several measuring stages and inspection checks; initial sample inspection reports are prepared in accordance with VDA or customer-specific standards. For seamless quality control, among other things a Zeiss 3D coordinate measuring machine in a climate-controlled room as well as optical 3D scanners are used.
| Evidence | Zwickau | Eisenach |
|---|---|---|
| ISO 9001:2015 | ||
| ISO 14001:2015 | ||
| TISAX |
History
- 1991
Founded by Leonhard and Christian Siebenwurst in Zwickau in the former toolmaking operation of VEB Sachsenring; 55 employees and 5 million DM in revenue in the first year.
- 1993
Start of tool maintenance and complete on-site tool service in the press shop of the Volkswagen plant in Saxony.
- 1997
Move to the new building at Herschelstraße 4 with 3,000 m² of manufacturing and 880 m² of office space; 100 employees.
- 2000
First extension to 4,300 m² of production space; purchase of a Heyligenstaedt gantry milling machine.
- 2002
Expansion to 5,200 m² of production and 1,580 m² of office space; establishment of a department for media-based sheet-metal and tube forming.
- 2003
Commissioning of a 40,000 kN combination press for external and internal high-pressure forming as well as conventional use.
- 2004
Establishment of the design office in Eisenach with 13 employees.
- 2009
Third expansion stage: construction of a new 1,400 m² hall and installation of a second Heyligenstaedt gantry milling machine.