The system is capable of verifying the surface hardness of Crankshafts and Camshafts, in Rockwell scale, quickly and very reliably. Tests can be performed on either finished ground surfaces or on turned and facetted surfaces, allowing for testing immediately after the heat treatment operation.
The hardness tests are performed according to ISO standards.
The uniqueness of this testing system makes it possible to neglect the test parts machined surface condition when the required testing load is applied to it. As a result the system can provide a higher level performance in terms of precision and reliability.
Camshafts for automobile engines are manufactured using a variety of methods.
They can cause a variety of quality defects, such as:
- porosity;
- hardness cracks;
- casting shrinkage, cavities and holes;
- missing material.
Subsequent grinding can also cause cracks or grinding burns (soft spots). They are caused by variations during grinding operations such as changes in grinding speed, changes in grinding wheel/workpiece position and by the effects of the coolant used.
In the past, attempts to automate test procedures have often failed.
Solution
Complex geometry’s such as camlobes can now be easily tested with standard Marposs N.D. probes.
The Marposs N.D. inspection method is based on the Eddy Current technology.
It is the only method capable of performing N.D. inspections automatically. For this reason, it can be easily installed into a production line for 100% inspection.
The traditional testing procedure, which is usually performed with magnetic powder and/or human evaluation, can be now reduced in terms of inspection time and overall cost.
Cracks as small as 100 microns in depth can be detected, dependent upon the surface finishing and material homogeneity.
Automatic N.D. Testing System
The parts are automatically loaded into the Marposs machine for simultaneous inspection of camlobes and journals.
The probes are equipped with diamond shoes and mounted on followers, which always keep them in touch with the lobe surface.
Minimum Cycle Time: 10 seconds.
Reject parts are automatically segregated.
Detectable Defect
The inspection equipments can detect the following defects:
- porosity;
- cracks;
- missing material;
- blow holes;
- nick and marks;
- grinding burns.
Application for the simultaneous inspection of 10 camlobes and 6 journals (16 probes total)
Automatic measuring trigger on the camlobe’s chamfer machine cycle time: 16 seconds
Thanks to the combination of two technologies, the pneumatic and the Eddy Current, it is now possible to perform both the dimensional test and the Non Destructive one on the cylinder bore with the same testing plug.
This equipment is used along with the E9066N FLAT PANEL and/or the E70s electronic unit.
The applications listed in this page are manufactured by the Marposs controlled companies MG SpA (Brescia, Italy) and Trace (Paris, France).
Leak testing is now generally used as one of the methods for quality and process control.
It is used in the machining or assembling process of a product, in order to detect not only the presence of pores or cracks in a cast piece, but also the absence of machining, the incorrect assembly of a component, a defective gasket or the imperfect machining of two mating surfaces.
In you are interested on knowing more, here it is the link: Leak Testing
Non-destructive checks (ND) are performed in order to detect surface or structural defects in a part without changing its physical condition.
In modern production systems it is indispensable to automate non-destructive checks, not only due to stricter quality standards, but above all because the failure of a mechanical component may affect the user’s safety.
Checking the surface defects of parts (such as cracks, porosity, etc.), the structure of the material and the hardness and depth of hardening, the eddy-current technology offers a testing speed that is higher than that of any other technology in the area of non-destructive checks.
Operating Principle
When a solenoid charged by alternating current (control sensor) is moved close to a conducting material (part to be checked), the alternating magnetic field creates a mutual-induction current on the part.
This induced current generates a secondary magnetic field that induces a current in the coil. The impedance of this coil may be affected by differences in the structure of the material, by the hardness of the material, the depth of the hardening or the presence of cracks or pores.
The system is capable of verifying the surface hardness of Crankshafts and Camshafts, in Rockwell scale, quickly and very reliably. Tests can be performed on either finished ground surfaces or on turned and facetted surfaces, allowing for testing immediately after the heat treatment operation.
Problem Description
Thanks to the combination of two technologies, the pneumatic and the Eddy Current, it is now possible to perform both the dimensional test and the Non Destructive one on the cylinder bore with the same testing plug.
The applications listed in this page are manufactured by the Marposs controlled companies MG SpA (Brescia, Italy) and Trace (Paris, France).
Non-destructive checks (ND) are performed in order to detect surface or structural defects in a part without changing its physical condition.