Friction item

FIELD: machine building.

SUBSTANCE: friction item consists of flat reinforcing metal frame with holes and of moulded-on to it friction element. The friction element has lugs corresponding to holes in the frame and inserted inside the holes. An additional metal frame with holes and with lugs corresponding to lugs of the friction element is made in a section of the friction element adjoining the metal frame.

EFFECT: increased resistance of connection of frame with friction element to shear loads; simplified process for obtaining high strength connection of frame and friction element in section of friction element adjoining metal frame.

2 dwg

 

The invention relates to the field of engineering, namely for friction products containing a reinforcing metal frame, such as pads of disc brakes of cars, pads and other friction products for various machinery and equipment.

Analogous to the claimed invention is a friction article containing flat reinforcing metal frame and reformovanii to him frictional element, the layer which is adjacent to the frame, additionally reinforced expanded metal sheet metal, fixed on the frame (see RF patent №2005619, IPC B29D 9/00, 1994). The essential features of similar flat reinforcing metal frame, reformovanii to him frictional element, the layer which is adjacent to the frame, additionally reinforced by a metal sheet, coincide with the essential features of the claimed invention.

The disadvantage of analog is the complexity of manufacturing, due to the complexity of fixing additional reinforcing expanded metal sheet (for example, by bolting, welding, and others), as well as, in some cases, and the impossibility of manufacturing friction products (for example, having small dimensions and thickness of brake pads disc brake cars).

The prototype of the claimed invention is a friction product, containing the e flat reinforcing metal frame with holes and reformovanii thereto a friction element, equipped with protrusions corresponding to the holes in the frame and placed inside the holes (see MBO and other Asbestos technical products. The catalogue. M, Tsniiteneftehim, 1984, SS, 75, 79). The essential features of analogue reinforcing metal frame with holes, reformovanii to him frictional element with protrusions corresponding to the holes in the frame and placed inside the holes coincide with the essential features of the claimed invention.

The disadvantage of the prototype is insufficient bonding strength of the frame and the friction element to the characteristic of the friction nodes efforts, shifting friction element relative to the frame. The strength of the prototype to this effort (deformation) of the shift caused by the adhesion of the material of the friction element to the surface of the metal frame, as well as resistance to "slice" of the projections of the friction element, which, in turn, is determined by the strength of the friction material. As a result, in the case of use as a friction material-filled polymer composites, it is not always possible to ensure the strength of the connection of the armature and the friction element to shear stress, even when using a special surface treatment of the frame, adhesives and other

The task, which e.g. is established with representation from the claimed invention, is to increase the strength of the connection of the armature and the friction element to shear loads. Another technical result, which can provide the claimed invention is to simplify the technology for high strength connection of the armature and the friction element by eliminating the special treatment of the frame, the use of adhesives and other

To achieve the technical result of the friction article containing flat reinforcing metal frame with holes and reformovanii to him frictional element with protrusions corresponding to the holes in the frame and placed inside the holes, contains part of the friction element adjacent to the metallic frame, an additional metal frame with holes made with the tabs corresponding to the tabs of the friction element.

The essential features of the claimed invention contains in part the friction element adjacent to the metallic frame, an additional metal frame with holes made with the tabs corresponding to the tabs of the friction element are different from the characteristics of the prototype.

Figure 1 presents the cross-section of part of the friction products. Figure 2 presents the cross-section option part friction products.

Fries is operating this product contains a flat metal frame 1 with 2 holes. The frame typically contains 2-6 holes, but the friction product, the skeleton of which has one hole, and 7 or more holes. To the frame preferowan friction element 3, provided with projections 4, corresponding to the holes in the frame. The number of projections may equal the number of holes in the frame or smaller. The shape of the protrusions can repeat the form of holes or different from it, for example, the height of the projections may be less than the depth of the holes. The friction element can be manufactured, for example, from a polymer composite friction material containing a polymeric binder and dispersed, including fibrous fillers. A layer of A friction element directly connected to the metallic frame includes an additional metal frame 5 with holes 6. Additional frame shape may correspond to a friction element or it may differ, for example, to be smaller. Additional frame can be manufactured, for example, of perforated sheet metal, sheet metal with rents, metal mesh, etc. the presence of additional holes in the frame ensures the penetration of the material of the friction element into the holes in the process of moulding-on, which results in a strong connection of an additional frame with Frikz the traditional element. An additional frame is provided with lugs 7, corresponding to the tabs of the friction element. The number of the projections 7 may be equal to the number of tabs of the friction element or smaller, and their form may repeat the shape of the projections of the friction element or different from it, for example, size. You can perform the protrusions 7 on the form as part of the projections 2, for example, when the frame 5 is not completely covers the holes 2 (option presented in figure 2).

A specific example of the inventive friction products is a block disc brakes BELAZ trucks, with an additional frame used steel mesh required configuration.

Be made of the inventive friction product is well-known methods. For example, the mold is placed friction polymer composition, perforated sheet metal, or a metal grid of the required size and flat metal frame. Next, carry out the molding and manufacturing pads known methods, with the tabs of the friction element and an additional frame are formed in the molding process by extrusion into the holes of the frame polymeric composition and a perforated tin (metal mesh).

Manufacture of friction products with additional metal frame with holes provide the t adhesion of the material of the friction element to the frame ("main") due to the penetration of the friction material in the holes of an additional frame (additional frame is located inside the boundary layer friction element), and the strength of the "slice" of the projections of the friction element is increased, compared with the strength of the friction material due to the reinforcement protrusions additional frame, which also has a "slice". In the result it is possible to increase the bonding strength of the frame and a friction element to shear stress.

Friction products containing flat reinforcing metal frame with holes and reformovanii to him frictional element with protrusions corresponding to the holes in the frame and placed inside the holes, characterized in that part of the friction element adjacent to the metallic frame, an additional metal frame with holes made with the tabs corresponding to the tabs of the friction element.



 

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