Mecachrome (France)

About: Mecachrome (France) is a company organization based out in Amboise, France. It is known for research contribution in the topics: Machining & Hydrostatic stress. The organization has 14 authors who have published 12 publications receiving 41 citations.

Set of plates or parts obtained by cutting a block of metal or composite material

Abstract: The present invention relates to a set (1) of plates (2, 3; 12, 13; 21, 22; 41) or parts obtained by cutting a block (4, 4'', 4''', 35) of metal or composite material extending around a plane (5) comprising a first plate (2, 12, 21, 41) or part having an upper face (7, 33) and a second plate (3, 13, 22) or part having a lower face (8). The upper face (7, 33) of the first plate (2, 12, 21, 41) or part has a surface (7, 330) having at least two lines of inflection or changing slope with respect to said plane (5), and the lower face (8) of the second plate (3, 13, 22) or part has a surface (8) with a shape complementary to the upper face (7, 33) of the opposite first plate (2, 12, 21, 41) at a more or less constant height, corresponding to the height of the cutting line (34) in the block (4,35).

Cylinder head, element and flange of a piston engine

Abstract: The present invention relates to a cylinder head, an element and a flange of a longitudinally extending piston engine comprising a piston head body (4) and a flange (5) on at least one element (6), the flange (5) being to interpose between a combustion chamber and the piston head body (4), comprising an upper face (7) facing the piston head body (4) and an opposite lower face (8) to be arranged facing the combustion chamber and being attached on the piston head body (4), the piston head body (4) being made from a material with a density and hardness that is less than those of the material constituting the flange (5). The flange (5) and the body (4) are assembled by bolts (12) for fastening the flange (5) on the piston head (4) located towards the edge of the flange (5) and of the body (4) and by at least one part (16) for fastening the piston head (4) on the flange (5) comprising a threaded end (17) for fastening in a corresponding hole (18) of the flange (5), said hole (18) being situated closer to the centre of the baseplate (5) than the fastening bolts (12).

Method for Sharpening a Machining Tip and Corresponding Sharpened Tip

Abstract: The present invention concerns a method for sharpening a worn removable machining tip (3) and the corresponding sharpened tip. The tip having a first cutting edge (7) damaged after a first use (u1), said tip having, in the state prior to the use of same, specific dimensional and geometrical parameters within a defined tolerance range and said first undamaged cutting edge (7) having a defined sharpness, the method involves sharpening the cutting face (9) by removing material from said cutting face on said first damaged edge (7), in order to make said tip (3) match said specific dimensional and geometrical parameters within said defined tolerance range, having a second cutting edge (7') of said defined sharpness.

Method for producing metal alloy parts with complex shape

Abstract: The present invention relates to a method for obtaining a solid blade of a turbomachine, comprising a core, a tip and a root, the method comprising:—a step of producing a blank from at least two parts (50, 51), at least one of which is a solid part, the at least two parts being assembled by a diffusion connection technique and without melting, and—a step of machining this blank in order to produce a blade with a defined profile.

Device for propelling a navigational seacraft, and navigational seacraft provided with such a device

Abstract: The present invention concerns an outboard propulsion device for a navigational seacraft comprising a propulsion means (4), at least one engine (1) supplying torque to a drive shaft (20) extending out of the engine and driving a transmission shaft (3) intended to supply torque to the propulsion means, the drive shaft and the propulsion shaft being in a fixed relative orientation, and a transmission means (2) connected at the input to the drive shaft (20) in order to receive the engine torque and transmit it at least partially to the transmission shaft. The transmission means (2) modifies the orientation of the engine torque and transmits it, in the form of modified torque, to the transmission shaft (3) to which it is connected at the output, and the transmission shaft (3) is a double universal joint shaft (30, 31) that extends in an inclined manner between the transmission means (2) and the propulsion means (4), the transmission shaft at least partially transmitting the modified torque to the propulsion means.