The network of subcontractors
DJ Méca has always had the ambition to provide a complete solution to its customers, including when it can not be (entirely or partially) performed internally. DJ Méca has surrounded itself with local, national and international subcontracting partners to respond positively to the majority of requests. The years of experience and exchanges with its suppliers ensure complete control of outsourced processes, and guarantee economical supplies while respecting the specifications of its customers.
Some subcontracted processes:
Thermal and surface treatments
- Zinc Plating: Surface treatment resulting in the formation of a zinc metal coating.
- Heat treatment: A technique of performing structural transformations through predetermined cycles of heating and cooling to improve mechanical characteristics: hardness, ductility, yield strength, …
- Anodizing: A surface treatment that protects or decorates an aluminum part by increasing its resistance to wear, corrosion and heat.
- Argenture: Depositing a layer of silver on any support.
- Burnishing: Surface treatment by superficial oxidation of steels obtained by chemical means, allowing to obtain a black appearance.
- Cataphoresis: Technique of painting which consists of immersing the piece in a bath of water-soluble paint, Then the painting is baked. The entire surface of the room is covered, even the hollow and hidden parts, as well as the sharp edges. The layer is thin and regular, about 20 microns. This fineness makes it possible to paint the threads without blocking them. The homogeneity of the layer gives excellent corrosion resistance and a good adhesion layer for a primer.
- Cementation: Heat treatment used to increase the surface hardness of steel parts.
- Nitriding: Heat treatment that increases the surface hardness of steel parts without altering the mechanical characteristics at heart.
- Phosphatation: Surface treatment to obtain a black appearance and preparing the room to paint.
Other types of subcontracting:
- Overmolding: A technique of placing a preform (or a section thereof) in a mold and injecting material thereabout.
- Sandblasting: A technique consisting in spraying an abrasive onto the surface of an object to modify its surface structure.
- Grinding: Machining operation to improve the geometric characteristics of a part.
- Lapping: The technique consisted of a rotating friction of the two parts with an emery paste until the contact was perfect. Lapping is a finishing operation that provides a very low roughness.
- Shot blasting: A technique consisting in spraying microbeads on the surface of an object to modify the surface structure.
There are three types of electro-erosion machining:
- Sinking EDM in which an electrode of shape complementary to the form to be machined is sinking into the workpiece.
- Electro-erosion by wire, where a conductive wire animated by a plane and angular movement cuts a workpiece following a controlled surface: since 2014, this process has been integrated internally on our Roanne site.
- Rapid drilling uses a tubular electrode to pierce very hard materials.