SU871953A1 - Stand for longistudinal expanding of cup-type sleeves - Google Patents

Description

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The invention relates to the processing of metals by pressure and concerns the improvement of a mill for the longitudinal rolling of glass-like sleeves on a pushed mandrel.

The invention can most effectively be used in the production of profiled, short glass-shaped articles, where product quality requirements are imposed and high productivity is required.

A tube mill is known for rolling glass-like sleeves onto. a pushed mandrel including a cross-roll stand with drive rolls changing caliber. specified program, and the mandrel task mechanism 1.

The disadvantage of the mill is that the cross rolling process does not allow to increase productivity (more than 200 sleeves per hour) and to provide improved quality of products, as due to the characteristics of cross rolling there is a significant deviation of the diametrical dimensions. In addition, the demands placed on this mill are high, because yes

however, insignificant defects, such as, for example, the hairs in the cross-rolling process, can be rolled out before the formation of flaws. As a result, the marriage reaches 25%

Also known is the mill for longitudinal rolling of stacked guilles containing the installer on the basis of a block of stands with work rolls, an axle and a mechanism for feeding the mandrel in the axial direction. The rolls of the stands of this mill are made by non-power, and the process of rolling is carried out from the mechanism of pushing the mandrel with the strung sleeve through

15 block stands. In this case, the glass-like sleeve can simultaneously be under the influence of the rolls of two or more stands of block 2.

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The disadvantage of this mill is that it is capable of rolling only a constant profile, i.e. Only smooth glass-shaped sleeves and products.

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The aim of the invention is to enable the manufacture of variable profile products.

The goal is achieved by the fact that a mill for longitudinal rolling of glass-like sleeves containing,

The stand-mounted stand assembly, the mandrel and the axial axial feed mechanism in the axial direction are equipped with a device for accelerating and turning the rolls of each of the stands made in the form of a profiled cam mounted on the mandrel feeding mechanism and cranks according to the number of working stands installed on a base with a pitch equal to the distance between the stands with the possibility of interaction with the cam, and roll turning actuators, kinematic connected with the respective rolls and having a turn-on clutch, with I eat every crank kinematically coupled with the rollers.

The drawing schematically shows the principal kinematic diagram of a mill for longitudinal rolling of glass-like sleeves on a pushed mandrel.

The mill includes a continuous rolling mill unit 1 with profiled rollers 2, a mechanism 3 for pushing the mandrel 4 with a strung sleeve 5 and is equipped with a device for individual acceleration and reversal of the rolls as part of cranks b connected to the corresponding cages of gears 7 connected via controlled sleeves switching on 8 to drives 9 for individual turning of the mill rolls after rolling, and profiled cam 10 mounted on the mandrel feeding mechanism 3 with the possibility of alternate interaction with the crank 6. Crankshafts 6 are placed in front of the block 1 of the stands with a step equal to the interstate distance m.

In the construction of the mill, it is advisable that the mandrel feeding mechanism 3 has one direction of movement of the cam 10 during rolling of the glass-like sleeve 5. Therefore, it is made chain-like, which allows shortening the cycle between rolling.

Each cam 10 is made with a concave profile. This allows the profiled rolls 2 to accelerate smoothly from a quiescent state to a speed slightly slower than the speed of the cam 10, i.e. the feed rate of the mandrel 4 (approximately the circumferential speed of the profiled rolls 2 after acceleration is 0.9-0.95 of the speed of pushing the mandrel).

The control sleeves include 8 drives 9 are made of electromagnetic. To control the angles of rotation of the profiled rolls 2, control devices 11 are provided, connected, for example, to the output shafts 12 of the gears 7.

The camp works as follows.

The initial position of the profiled rolls 2 blocks 1 of the stands is such that the beginning of the working part of the profile

rolls are at an angle Y to the plane transverse to the axis of rolling, and cranks b are in a vertical position and directed to the axis of rolling, clutches 8 are turned off.

The mandrel 4 with a strung glass-shaped sleeve 5, for example, from the roller table 13 enters the chain mechanism 3 and then the stop 14, which is combined with the cam 10, is fed to the block 1 of the roll stands. As it moves, cam 10 encounters crank 6, associated with the first cage of the block, and causes its rotation. The movement of the crank b through the transmissions 15-17 and gears 7 causes a smooth acceleration of the profiled rolls 2 of the first stand of block 1 from a state of rest to a peripheral speed equal to 0.9-0.95 of the speed of movement of the mandrel 4. When such a circumferential speed is reached, the metal is stacanoid liner 5 begins to contact with the initial part of the working section of the caliber profile of the rolls 2 of this stand (rolls of the first stand received a turn during acceleration at the angle C). Next, the leading element for the rolls 2 of the first stand of the block 1 begins to serve as the sleeve 5, pushed by the mandrel 4, when it is fed. At the same time, the rolls 2 begin to rotate at a peripheral speed equal to the feed speed of the mandrel. This causes the crank 6, corresponding to the first stand of the block, to stop interacting with the cam 10, since at this moment it begins to turn from the action of the rolls 2, which have increased the speed of rotation from the action of the pushed sleeve 5.

During the longitudinal rolling, both the angle of rotation of the rolls 2 of the cage of block 1 and the angle of rotation of the crank 6 is determined by the length of the glass-like sleeve and the diameter of the bulge 2. Its magnitude with the angle of roll acceleration must always be less than 360 ° by the angle of rotation of the rolls 2 after rolling to their original position. Therefore, after the passage of the liner 5 through the rolls 2 of the first stand of the block 1, the angle of rotation of the rolls 2 is fixed by the commander 11. The signal from the commander 11 is then fed to the controlled turn-on clutch 8, which can be turned by the actuator 9 to turn the rolls 2 of the first stand of block 1 to their initial position on the subsequent rolling, which is also fixed by the same control unit 11, in order to then disconnect the clutch 8.

The action of the subsequent stands of block 1 is similar to the effect of the first stand of this block, because as the number of stands 2 with profiled rolls 2,

used in the mill longitudinal rolling, corresponds to the number of cranks 6, the sequence of rotation of which is predetermined by the passage of the cam 10, associated with the mechanism 3 for pushing the mandrels.

The end of rolling the liner 5 in the last stand of the block 1 fixes the photo relay 18, the signal of which is used, for example, for the dispensing rollers 19, providing the issuance of the mandrel 4 with the sleeve 5 strung on it from the block 1 to the rollers 20 of the subsequent roller table.

This mill for longitudinal rolling of stacked sleeves on a pushed mandrel, as compared with the best examples of similar equipment, allows to increase productivity in the production of short sleeves of variable profile by continuous longitudinal rolling.

Longitudinal continuous rolling of a short glass-like sleeve strung onto a mandrel with simultaneous molding of a given variable profile on its outer surface ensures high quality of rolled products with high precision of the internal cavity, which in some cases is used as a base for subsequent processing of products. This completely eliminates the possibility of rolling the so-called hairs.

According to the calculation, the annual economic effect from the use of equipment of a production line is 1296309 r.

The percentage of the effect on the proposed mill according to this technical expertise is 16%.

Claims (2)

1. USSR author's certificate No. 342700, cl. B 21 B 15/00, 08/31/70. 2.L.I.Stivakovsky et al. Metallurgists of capitalist countries. Metallurgists, Moscow, 1970,. P. 116.