DE186977C - - Google Patents

Description

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imperial

Patent office

PATENT LETTERING

CLASS 7ft. GROUP

BRUNO LION in HAMBURG. Rolling mill for cross-rolling cylindrical workpieces.

Patented in the German Empire on July 11, 1905.

The present invention relates to a rolling mill with conical, parallel to the longitudinal center line of the rolling stock stored rollers for intermittent cross-rolling of cylindrical bodies on such smaller diameters.

In the new rolling mill, grooves are machined into the rolls parallel to the rolling axes. One side wall of each groove gradually goes into the periphery of the rollers

ίο about. The grooves give in their position between the opposing rollers, the workpiece is free and thus allow the stepwise Advance of the same. The burrs that occur during intermittent longitudinal rolling on the circumference of the rolling stock are excluded when using the new rolling mill.

Fig. Ι shows the rolling mill in side view, Fig. 2 in plan half in

so section and Fig. 3 in cross section. 4 to 6 show three different cross sections and FIG. 7 shows the plan view of the rollers with the workpiece in section.

The conical rollers a, which at

Λ5 of the embodiment shown have a cylindrical part α ^λ on the keg base, are attached to shafts b , which are equipped at their bearing points to prevent axial displacement with ring lugs or collars c , which run in corresponding grooves of the bearing shells d . In order to take into account the different thicknesses of the workpieces, the rollers are adjustable. The two-part bearings / are arranged displaceably in a cutout g of the machine frame h and each have a lateral arm i in which a screw spindle / t engages. The latter is rotatably but not displaceably mounted in the longitudinal direction of the racks, "" protruding outward in front of the machine frame and here carries a worm m. The associated screw either side, so each for a roller, seated on a common, by hand 'rad η rotatable shaft 0 so that the bearings of each roller are adjusted simultaneously. After the rollers have been adjusted, the bearings are fixed by clamping screws q .

The support rollers ρ for the rolling stock are also set by a similar worm and screw gear by means of a handwheel r . Two support rollers p ¹ and p ² are expediently used, of which p ^{1 is} mounted horizontally and p ^{2 is} mounted diagonally according to the conicity of the rollers. The storage - or support member s of these rollers resting on the vertical screw spindles t, which transmission by the r with the aid of the hand wheel moving worm ¹ M up and down moved.

If a pipe is to be produced, the perforated workpiece ν is pulled onto the mandrel w , which determines the inner diameter of the pipe and is pressed forward with the workpiece. Here, the workpiece is introduced between the rollers on their narrow side, whereby it first reaches the inclined support roller, at such a height that the center line of the mandrel or the workpiece is a little lower than the center lines of the roller.

zcn «lies. When the rollers rotate <τ, they now act on the rolling stock in such a way that they compress the latter at the detected point. The material displaced in the process moves forward and is rolled onto the front end of the dome that is still free. As mentioned at the beginning, the rollers have longitudinal grooves α ' ² , which in comparison have such a large free one

ίο space, show that the rolling stock is released. During the rolling process described above, the rolling stock is held by the rollers so that a forward movement of the workpiece is impossible. When the longitudinal grooves ti ^{2 of} the rolls come into opposition, ie the rolls come into the position of FIGS. 1, 4, 5 and 6, the rolling stock is released. · This release occurs as soon as point 1 of the rollers when rotating in the direction of the arrows Fig. 4 to 6 passes point 2 of the rolling stock and continues until point 3 of the rollers comes into contact with the rolling stock. In the embodiment shown, there are two gaps α ² on each roller, so that the workpiece is released with every half revolution. During this release, the workpiece is pushed forward so that when it is picked up again, the rolling stock is machined by a further piece. The cylindrical parts a ^{l of} the whale ^! 7.011 α have the effect that the workpiece is hcrabgcwalztc up to the desired diameter smoothed on its circumference.

It is readily apparent that the grooves which enable the advancement are also located can only be in one of the two co-operating rollers while the other roller has an uninterrupted circular cross-section throughout.

It should also be mentioned that the drive of the shafts b can take place in any way, but in order to take account of the displacement, they are connected to the drive shafts by ball joints or other universal joints.

Claims (1)

Patent claim:, Rolling mill with conical rolls, mounted parallel to the longitudinal cutting line of the rolling stock, for the transverse rolling of cylindrical workpieces, characterized in that one or more grooves are machined into one or both rolls (a) parallel to the roll axes, one of which is steep and one which gradually extends into the surrounding surface of the Rolls transitioning side surface are formed so that when the rollers rotate, the grooves temporarily release the workpiece and allow the intermittent advance of the rolling stock. 1 sheet of drawings.