The method of manufacturing products of the type of rotation of a body with a curved surface

 

The invention relates to a technology of manufacturing products with a curved surface of rotation of variable thickness. The method of manufacturing products of the type rotating bodies with curved surface includes attaching metal strip on the mandrel and winding it on a mandrel to obtain a roll of the desired size. With the help of a reference ball on the roll is formed of a curved surface. Reference ball is mounted on the frame. The wound tape produced with offset coils roll up to the stop edges in the surface of the reference ball. When the winding of the tape on the mandrel side of the tape cover polymer composite material. Between the reference sphere and a curved surface of a roll set with a release liner. After winding to produce polymerization. Are provided as a result increase the durability of the product and reducing the complexity of its manufacture. 1 C.p. f-crystals, 2 Il.

The invention relates to a technology of manufacturing products with a curved surface of rotation of variable thickness. Can be used in the manufacture of seat ball valves.

Known methods of manufacturing products with a curved surface is 43/18, 65/42, 1997, proposed technical solutions, in which the pressed articles from blanks, representing the roll of tape.

Closest to the claimed method is described in the patent 2141359, 10.12.99, 29 43/02, including the winding of the blank in the form of a rolled tape of non-metallic materials, installing it in the mold and pressing. The complexity of manufacturing is that it is necessary to consider opressovku material when choosing the height of the ribbon, in addition, the beginning of the tape must move relative to each other by a certain amount. Time-consuming and the process of pressing. Not provided the necessary wear resistance of parts.

The technical task of the present invention is to remedy these disadvantages and to create a technology that allows to reduce the complexity of manufacturing, to improve the wear resistance of the sealing seat for the purpose of using them for higher performance.

The technical result is achieved in that in the method of manufacturing products of the type of rotation of a body with a curved surface, comprising attaching metal strip on the mandrel, winding it on a mandrel to receive a roll of desired size and form in him the tape with offset coils roll up to the stop edges in the surface of the reference ball. While one side of the wound tape cover polymer composite material, such as "Desan", between the reference sphere and a curved surface of a roll set adhesive strip, and after winding to produce polymerization.

"Desan" THE 6-05-20527821-001-93. working in the temperature range from minus 185oTo + 200oS, consists of two components: resin parts and various hardeners. To avoid stiffening of the roll with the reference ball during curing of the composite material, between the end of the roll and the ball is anti-adhesive film.

To reduce the complexity compared to the prototype is achieved by eliminating the process of preparing the tape for pressing, non-precision molds.

Use a metal tape with gluing her polymer composite material will increase the tightness, wear resistance parts, used, for example, as a sealing seat ball valves with high performance (pressure of more than 80 MPa, temperature from -185 to +200oC), resistant to aggressive environments: alkalis, oils, kerosene with foreign inclusions.

In Fig. 1 presents Razina giving details with a curved surface of rotation.

The method consists in the following.

On Rethimno mandrel 1 are internal annular ferrule 2 and the reference ball 3. Then in the slot of the holder 2 is inserted the end of the tape 4 with the touch of her ball 3 and then the tape 4 on the mandrel 1. The mandrel 1 gives the rotation, and in the process is the formation of a roll of metal strip 4 on the ring holder 2. Tape 4 wound with the shift of each coil relative to the previous one until it stops with the surface of the ball 3. While one side of the wound tape cover polymer composite material. When reaching the wound roll of the required size, it is recorded and removed from the mandrel. Then the roll is put on the outer ring of the holder 5, which prevents the roll from unwinding. After completion of polymerization of the polymer material outside of the end face of the roll can be cut mechanically. Polymer composite material when forming part of the wound roll creates a tighter fit to the surface of the ball by filling the space formed at the end of the roll when stepped shift tape.

The present invention reduces the complexity of processconnect details the integrity of the product as a whole. Get the details can be used in ball valves, working with higher settings.

Claims

1. The method of manufacturing products of the type of bodies of revolution with a curved surface, comprising attaching metal strip on the mandrel, winding it on a mandrel to receive a roll of the required size and the formation of his curved surface with the help of a reference ball, which is placed on a mandrel, and winding of the tape is produced with offset coils roll up to the stop edges in the surface of the reference ball, characterized in that the winding of the tape on the mandrel side of the cover tape of composite material, between the reference sphere and a curved surface of a roll set adhesive strip, and after winding to produce polymerization.

2. The method according to p. 1, characterized in that the use of polymer composite material "Desan".

 

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