The method of manufacturing lanero

 

(57) Abstract:

Usage: metal forming, in particular, the processing by cold plastic deformation. The inventive make the two parts of the tube and a shell made of materials with different elasticity limit. Collect the mentioned items by installing pipes in the shell gap. After Assembly, plastic deformation is subjected to a part made from metal with a lower limit of elasticity. 2 Il.

The invention relates to a cold metal plastic deformation and can be used, for example, for the manufacture of lanero cylinder rod oil pump.

A known method of manufacturing lanero, according to which a thin tube is inserted into the shell gap [1] Between the outer surface of the pipe and the inner surface of the shell there is a gap.

The shortcoming of the above method is the existence of a gap between the pipe and shell, resulting in lower stiffness of the liner, and in some cases, for example, in the manufacture of cylinder oil pumps from lanero, the gap significantly reduces the quality of the subsequent operation of hardening the inner surface is put on the pipe surface and the inner surface of the shell is made conical [2]

The disadvantage of the method described above is that it is difficult to implement. The difficulty is making the mating surfaces for strictly required to agree odnoosnoi conical inner surface of the shell with a conical outer surface of the pipe.

Also known a method of manufacturing lanero, whereby after Assembly of the tube shell with some clearance on mating surfaces, the liner is subjected to avtomatizovani (see page 38) [3] i.e., plastic deformation of the pipe in order to eliminate the gap between the pipe and shell, and the simultaneous hardening of the pipe.

A disadvantage of the known methods of producing laserow is that when the bond of lanero by plastic deformation of one of the parts of the liner (shell and tubes), are not taken into account mechanical properties of metals that are not capable of providing high-quality, backlash-free fastening of the pipe with the shell and, consequently, leads to a low quality product as a whole.

For example, in the manufacture of cylinder oil boom pumps from bonded lanero, where the pipe is made of high-alloyed nitriding steels, and the shell of nizkouglerodistuyu the normal course of the nitriding process, resulting in dramatically increasing nitriding time and reduces the quality of nitriding the surface of the cylinder and the pump as a whole.

The objective of the invention is to develop a method of making lanero providing high quality gapless connection pipe with the shell and stiffening liner.

This technical result is achieved in that in the manufacture of the liner, including the manufacture of the two parts of the pipe and shell and assemble them with each other with a gap, according to the invention the plastic deformation is subjected to a part made from metal with a lower limit of elasticity.

The result of solving the problem is that when exposed to a part made from metal with a lower limit of elasticity through it we work on the item with a great elasticity limit.

After removal of the load items with a lower limit of elasticity remain residual plastic deformation, and the detail with great elasticity limit will take its original dimensions and bassethorn lie down to the mating surface of the elastic part.

In Fig. 1 shows the method of connection of the liner, in which the shell is made of metb connection of the liner, in which the shell is made of metal with a large limit of elasticity, and the tube is made of metal with a lower limit of elasticity. The liner is made as follows.

Originally made shell 1. After measuring the inner diameter of the shell 1 is treated on the outer surface of the pipe 2, thereby guarantee the clearance between the mating surfaces. After Assembly of the shell 1 with the pipe 2, the liner is fed to the bonding operation. The fastening is effected by deformation of one of the mating parts of the shell 1 or tube 2. The deformation can be performed using high pressure liquid, gases, by way of forging, rolling, burnishing or other methods.

In Fig.1 shows one possible bonding of the liner, in which the shell 1 is made of a metal with a lower limit of elasticity, and the pipe 2 made of metal with a large modulus. In the case of plastic deformation is subjected to the shell 1. For this purpose, metal cutting equipment, for example, horizontal boring machine, swivel the workpiece headstock, along the axis of the machine set obkatkoj tool with deforming rollers 3. The stem of the machine install the mandrel 4, kenise outer diameter of the shell (the size by deforming rollers is determined experimentally, depending on the diameter of the liner, the thickness of the shell 1 and the pipe 2 and the mechanical properties of the metal) rescatame instrument reported rotational movement of the V, and the liner progressive S, perform the plastic deformation of the shell 1 and the elastic deformation of the pipe 2.

Due to the different mechanical properties of the metal shell 1 and the pipe 2 in the shell happens to plastic deformation, causing the outer and inner diameters will decrease and the pipe 2 will happen elastic deformation, where after removing the load, the parameters of the tube will return to its original position, thus, there will be backlash-free and high-quality bond liner.

In Fig. 2 depicts one possible binding lanero, in which the shell 1 is made of metal with a large limit of elasticity, and the pipe 2 made of metal with a lower limit of elasticity.

A liner mounted on the broaching machine with emphasis in fixture 6 one of the ends. The hole in the pipe 2 being the mandrel 7, the output of which screw the mandrel 8. The mandrel outside diameter is made to be larger than the size of the inner diameter of the pipe 2. The magnitude of the tension mandrel 8 in the bore of the pipe 2, as in the previous case, opredelaetsa is rmatio shell 1, leading to a backlash-free and high-quality bonding of the shell 1 with the pipe 2, as in the previous case.

The method of manufacturing lanero, including the manufacture of pipes and shell Assembly with each other by setting the tubes in the shell gap and the subsequent plastic deformation of one of the assembled parts, characterized in that the tube and shell are made of metals with different modulus and plastic deformation is subjected to a part made from metal with a lower limit of elasticity.

 

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