CADFEM has acquired over the past ten years a recognized expertise in the simulation of watch parts and mechanisms. Our watchmaking experience allows us not only to support you in the implementation of simulation in your company but also to make this tool, as quickly as possible, productive in order to significantly reduce the number of prototypes.
precise watch simulation
Experience for the watchmaking industry
Recognized by the watch industry for its experience in watch calculation, CADFEM (Suisse) AG's team of engineers has been sharing its simulation know-how with watch manufacturers for 20 years. It provides watchmakers with effective tools to perform complex simulations, design more reliable products, accelerate the development process and reduce the research budget.
Indeed, simulation with Ansys facilitates the creation of many virtual prototypes, in a controlled environment where all physics are managed. These can be coupled together to facilitate the work of developers. To ensure that watch calculation is an efficient tool that is fully integrated into your research and development processes, the CADFEM team will guide you through your projects with local support.
Static calculations are performed on systems in static equilibrium (zero, near zero or constant speed). The calculations carried out make it possible to evaluate the consequences of forces applied to the parts during assembly or use.
Do you want to know the exact hunting force required to drive an ice into its shape and know the deformation of the joint? Ansys provides an important library of material models or allows you to define a new one such as the Hytrel® in just a few clicks. With Ansys You visualize the forces acting on the ice, the joint and the pressure (sealing), after the chasing.
With Ansys Mechanical, simulate the maximum stresses in a rocker spring, its pre-arming and arming, and get the resulting torque. Modeling benefits from the advanced capabilities of contacts in Ansys, such as friction due to contact slippage. In addition, large displacements and deformations can be simulated simply. Dimension a spring on the computer to match your specifications.
Dynamic calculations are performed on moving systems under the influence of mechanical actions with significant mass and inertia effects. Dynamic calculations are performed on flexible bodies as well as on rigid bodies.
The dynamic modulus allows you to simulate the movement of rigid bodies and the exact deformation of flexible bodies such as the springs of a chronograph mechanism. It is thus possible to model the reset, start/stop, loading of the return springs, forces on the pusher and the operation of a virtual prototype. Changes and tests on new variants are made directly using the software.
You want to simulate the result of a fall from a height of one meter on the elements of a watch. The dynamic module will apply an acceleration on the components (dial, fixing flanges, movement, flanges) and then calculate their deformations during the impact. It is also possible to observe the stress of the flanges and screws and study the influence of the parameters during the impact. In this example, 17 parts are modeled and 48 contacts are created.
Swiss anchor exhaust
Using a dynamic simulation with rigid bodies only, quickly check the interaction of parts while neglecting their deformation. The video of a Swiss anchor escapement shows how the mechanism works, taking into account friction contacts, part inertia and gravity. Once the simulation is in place, study the behaviour within the tolerances, for example.
Calculation of the friction of a pendulum
Dynamic simulation with Ansys LS-Dyna taking into account the flexible spring and rigid bodies. This simulation makes it possible to quantify the friction losses over several periods and thus the logarithmic decrement and then the quality factor of the balance, according to its orientation in relation to gravity. A geometric variant was also studied.
Study of mechanisms as systems. The system created with the Simplorer add-on software highlights the dynamic evolution including inertia and flexibility of certain parts, energy transmission, synchronization effects, transmission delays, and energy balance.
Fluidic calculation is important in the watchmaking world to characterize the proportion of air damping or the effects of surface tension and lubrication viscosity.
Damping of a pendulum by air resistance
The calculation of the air flow around the balance provides the resistive torque due to viscous friction, disturbances due to the passage under the balance bridge, the location of the maximum friction zones, the contribution of each part.
Contact with an oil film
The simulation makes it possible to calculate the dynamics of oil films in the contact areas and to extract, among other things, the very precise evolution of the force acting on the parts.
The parasitic forces due to the application of a magnetic field to the mechanical components of the watch can be calculated to meet or exceed the anti-magnetic watch standard.
Magnetic field in the watch
The calculation of the shielding of the magnetic field by the watch allows to know the local field acting effectively on the critical components. This simulation facilitates analysis and the search for probable interferences before the production of a prototype.
The transient electromagnetic analysis of the Lavet motor gives access to the dynamic behaviour of the motor, which makes it possible to study the influence of many parameters such as, for example, the evolution of the current in the coil over time, the friction on the axis, the inertia of the rotor, the geometry, the materials chosen etc.
Behaviour of a spiral spring subjected to a magnetic field
The purpose is to quantify the effects of magnetic fields on the operation of a spiral spring. We have the result here in the following cases:
- magnetization in a constant field
- magnetic remanence after exposure to an external magnetic field
- deformations due to persistent magnetic forces
Acoustic calculation makes it possible to examine and adjust the timepiece from a digital model reproducing the physical characteristics of the prototype to be built. Optimize the timepiece according to the parameters of your model.
Ansys allows advanced acoustic studies! You can define excitations on the rooms and calculate the acoustic waves radiated in the surrounding air. Such a numerical study of the possible configurations of the watch timbre (geometry, materials, excitations) allows you to develop a thorough understanding of the phenomena influencing sound. In this example, we obtain a time signal allowing the extraction of different spectra over time and the sound produced.
Sound wave diffusion
Once the acoustic calculation is complete, you can visualize the diffusion of sound waves in the air.
Listen to the watchmaker's stamp
Once the acoustic calculation is complete, you can listen to the sound of the watch timbre produced according to the characteristics defined for this calculation.
Carried out in 3 steps with the Optislang module, the robust optimization calculation aims to provide an optimal and robust solution based on the chosen parameters, taking into account tolerances, variations on materials, loads, etc.
Robust optimization of a pull spring
Find a shape that provides predefined tensile and pushing forces on the pin while minimizing maximum stress. The desired forces are obtained with an accuracy equal to that of the model. Robust 4.5 sigma pull tab for the stress field in the part. These results are obtained with Ansys optiSLang.
As the Internet of Things (IoT) market expands, the speed of bringing new connected objects to market is crucial to be competitive. The creation of a virtual multi-physical prototype accelerates the design of such a product.
With Ansys, simulate an entire virtual prototype, with multi-physical calculations (mechanical, high frequency electromagnetic, thermal, electronic). The use of simulation anticipates problems related to production, use and accelerates time to market.
Discover in the commented video the different calculation steps and tools proposed by Ansys.
Watchmaking training courses
These training courses are based on concrete cases from the watchmaking world. Based on our experience in watch calculation, in the different physics, we transmit our know-how to you, adapted to your specific applications.
Watchmaking training courses
You have just built a watch construction but you do not know if it is correctly dimensioned. CADFEM offers you seminars specially designed to meet the needs of watch manufacturers. Our engineers will guide you through the calculations that take into account the specificities of the watchmaking world. Ansys Workbench allows you to check the strength of the parts and calculate the forces and torques acting in your assembly from the design stage.
More simulation applications
Our simulation solutions cover a wide spectrum of physics.
For the most important domains of physics, there are also specific applications that go much further in-depth.
CADFEM covers practically all of them. With software and technical expertise.