Home Software COLDFORM® COLDFORM® - for metal fasteners

COLDFORM® - for metal fasteners

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Fasteners and mechanical joining for your intensive use applications

Fasteners and mechanical joining now meet extremely stringent requirements in terms of safety and longevity. Whatever the industrial sector, the manufacturing process must be perfectly mastered in order to offer strong guarantees concerning the functional behavior and service performance of the fastener solutions.

In order to support manufacturing trends towards the production of innovative products (special, miniature and hybrid fasteners) and in order to support global requirements in terms of weight reduction, the use of simulation software such as COLDFORM® facilitates decision-making in response to quotation requests, allowing products to be rapidly brought to market, while continuing to guarantee the required level of quality.

COLDFORM® offers many advantages

  • Design and validation of forming sequences
  • Prediction of fastener properties
  • Improvement of existing processes
  • Boosting your innovation capacity


For fasteners

Forming sequence for a Torx hexagonal head screw (courtesy of Miguel Altuna Institute, Spain)

COLDFORM® simulation helps master the entire cold forming process, from wire cut-off, via the forming sequence, to thread rolling.

At the part level

  • Initial shape conforms to specifications
  • Temperature, internal stresses, grain flow
  • Defects (folds, underfill, non-compliant material flow, etc.)
  • Risk of premature cracking due to damage
  • etc.

At the tool level

  • Abrasive wear
  • Tool deformation, stress, risk of rupture, contact time
  • Interference fit study, coupled calculation taking inserts and die cases into account
  • etc.

At the press level

  • Balancing the tonnage per station
  • Adapted to presses with spring-loaded or sliding dies
  • etc.…


Residual stress induced by the thread rolling process

For mechanical joining

  • Clinching
  • Riveting, Self-piercing riveting
  • Crimping
  • Punching
  • etc.

Riveting simulation: blind rivet (left) and self-piercing rivet (right)

COLDFORM® is able to simulate a broad variety of mechanical joining processes and includes advanced numerical techniques such as self-contact, or material deletion according to damage threshold values.

Selecting the appropriate fastener solution implies constant engineering challenges. COLDFORM® allows you to design both the ‘Process’ side and the ‘Product’ side. Thus offering several competitive advantages

'Process’ simulations: focus your analysis on metal deformation and on tool mechanical strength

  • Ensure process feasibility by detecting defects before production launch
  • Optimize process conditions to reduce costs and accelerate market launch
  • Prevent tool breakage and increase die service life by analyzing tool stress (including with pre-stressed inserts)
  • Ensure dimensional control of fasteners and their properties (residual stress, hardness) by taking springback phenomena into consideration
  • Easily translate the mechanical properties, specified on the material data sheets delivered by your suppliers, into simulation data
  • Exploit the automatic optimization feature to perform reverse analysis and easily identify friction coefficients or behavioral laws
  • Model part damage according to multiple rupture criteria (Latham & Cockcroft, Oyane, Ryce & Tracey, Chaboche-Lemaitre, etc.)
  • Observe the impact of wire cut-off on the appearance of defects at the end of the forming process
  • Save time thanks to ‘chained simulation’ and ‘batch manager’ features, allowing you to launch the simulation of the entire forming sequence in one go

‘Product’ simulation: focus your analysis on the fastener’s service performance

  • Take advantage of the initial manufacturing process conditions (history of deformation and residual stress)
  • Test fastener behavior and strength under conditions of use
  • Perform multi-body simulations to check the fastener’s performance
  • Optimize fastener behavior during the fitting step and choose the head shape accordingly (e.g. on screw head)
  • Improve the quality and performance of your products
  • Try out new designs for innovative projects


Mechanical calculation of fastener service performance

 

Make the most of ‘Virtual Manufacturing’ and create unique opportunities to reduce costs and stand out from the competition! 

Transvalor does not make any compromises concerning the quality of its products and services. You can purchase or lease a license, or even seek advice for an engineering problem. Our simulation experts will provide you with the services best suited to your expectations. 

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