SU47642A1 - Machine for turning calibrated mill rolls of pilger mills - Google Patents

Description

In the factory technique, calibrated rolls, in particular, for pilger mills intended for rolling on a mandrel, are machined on lathe milling and grinding machines. However, such processing is difficult and expensive. So, for example, when machining on a lathe, cutting takes place in the direction of the rotational movement of the rolls, i.e., in a plane perpendicular to the axis of rotation of the rolls; in this case, to form a curvilinear profile of the roll, a different motion is communicated to the tool through the cam device.

In other cases, the processing is carried out by means of a tool located under the action of the guide plate and set in the radial direction in a plane passing through the axes of the rolls; at the same time rolls receive only the movement of donation. However, through this method of operation, it is not possible to achieve the complete formation of the required profile, since the straight side bevels have to be produced by other means.

According to the invention, it is intended to produce completely the entire profile.

(373)

roll on the same machine. This is achieved by the fact that the tool performs a working movement consisting of rotation around its axis and multiple longitudinal movement performed periodically in the radial direction with respect to this axis during each rotation of the tool.

To carry out this movement of the cutter, the already known mechanism consisting of a supor, moving in the radial direction in the rotary chuck, and a cam device on which the rotary chuck is mounted, are used. This cam device consists of a ring and segments, of which the ring serves to guide the cartridge when the metal is removed in a circle of constant diameter, and the segments are intended to give the cartridge additional movements when removing the metal in places of irregular shape.

In FIG. 1 shows a side view of the machine; FIG. 2 - its top view; FIG. 3-section of the mechanism for feeding the suporta; FIG. 4 is a partial top view of the same mechanism; FIG. 5 and 6, longitudinal and transverse section of the mechanism for moving the movable headstock; FIG. 7 is a cross-section of the machined roll; FIG. 8- various axial sections of the roll in one plane.

The cutter / (FIGS. 1 and 3) is fixed in the support 2, which can move radially in the chuck 8. This chuck gets rotated from the motor 3 by means of a gearbox, bevel wheels 5 and 5 and a cylindrical wheel 7 coupled to the outer gear of the chuck 8. In order to move the supor 2 along cartridge 8, the latter has a part widened to the end, and the cartridge itself is placed in a fixed ring 9. The radial displacement of the supor is carried out using a mounting device located inside the cartridge 8 (fig. 3) Connections with suportom 2 toothed rack 10, the gear 77 and the rack 12.

The spring (Fig. 3), or other elastic elements, provides the reverse movement of the supor 2 and its constant connection with the elements controlling the movement. A toothed rack 72 is actuated by raising and lowering a finger 75 fixedly connected to the rack, this finger 13 extending out through the slots 14 in the sleeve, the cartridge 8, and fastened with its ends in the cross 75, covering the sleeve of the cartridge 8. For movement along the axis of the cartridge 8 crosses 75 serves as a cam device acting on two rollers 76 placed in this cross 75. In the design shown in the drawing, the finger 13 transmits not only the movement from the cross 75 to the rail 72 and then to the caliper 2, but also transfers from the cartridge 8 to the crosspiece 75. In order for the transmission of rotation to the crosspiece 75 not to prevent the finger 13 from fulfilling its main purpose, namely moving upwards with the crossbar and transmitting movement to the rail gear system 10-11-72 inside the cartridge, in this case rotational the movement is transmitted to the cartridge 5 from the crosspiece 15 by means of a coupling coupling between them.

The cam device consists of a support ring 17 and a cam segment. The reversal of the support ring 77 is carried out by means of a master cut, which is on the non-rotating holder 19, by means of a worm gear 20, a screw 27, three pairs of bevel gears 22, 23, 24 -25 and 26-27 (fig. 4) from a drive shaft 28 on which a bevel wheel 27 is mounted. Both fist segments 18 are activated by moving a holder 29 provided with screw-holes with screws 30 that receive rotation from shaft 37 pr means of worm gear 31, 32 and bevel gears 33-34 and 35-36.

The machining sites of the calibrated rolls (Fig. 7), which are presented in cross section, consist of a circular part and side straight bevels, and their processing is carried out in such a way that the cutting tool cover during one turn removes metal in a circle from two fixed calibrated rolls and in four places along the tangent direction of the circle along a straight path or along a curve. The circular path of the cutter corresponds to rolling of the rollers 16 along the support ring 77. With further rolling, these rollers 16 are raised by cam segments 18, and at this time the cutting edge of the cutter is machined with an increasing radius of the cutter, the roll bevel adjacent to the circular tangent to the circular path. When the rollers 76 reach the highest point of the segments 18, the cutting edge of the cutter will be in the gap between the two calibrated rollers (Fig. 2). At this moment, the direction of movement of the rollers changes, and the cutter begins to cut when the second roll bevel is constantly decreasing in its radius of action, and when the rolls 16 are transferred to the support ring 77, the circular portion of the second calibrated roll adjacent to the bevel.

Since the circumferential portion and the bevel in accordance with the feed while rotating the calibrated rolls are constantly changing, as can be seen from FIG. 7 and 8, therefore, the support ring 77 and both fist segments 18 are also continuously rearranged in height. This operation is performed by turning the shafts 28 and 37 by hand or by some known mechanism (as

for example, templates and servomotors, etc.). The rotation of the shaft 28, resulting in the raising and lowering of the support ring / 7, takes place in accordance with the type of middle section of the roll, as shown in FIG. 7, while the rotation of the other shaft 37, which entails raising and lowering the cam segments 18, takes place in accordance with a curve similar to the middle section, however, the change in the side bevels of the calibrated rolls is taken into account.

In order to enable fast fixing of the machined rolls, the two heads 38, in which each of the calibrated rolls is attached, are connected to each other so that they can be simultaneously and evenly displaced to achieve parallel rolls movement. For this base, the heads 38 are provided with tidal holes with screw thread for spindles 39. When the screw spindle 39 (Fig. 6) communicates to both heads, they are rotated from the drive shaft 44 through cylindrical gears 40, 41 to the worm gear 42,43 A roll approaches or moves away from the tool, without changing the parallelism about & ample of both rolls.

The subject matter of the invention.

Claims (3)

1. A turning machine for calibrated rolling rolls pilgrim X mills using a radially movable supor in a rotary chuck, characterized in that for removing metal around a constant diameter circle the rotary chuck rotates freely on the support ring / 7, and for removing metal in places of irregular shape, the cartridge receives additional movement with additional fist segments 18. 2. In the machine tool according to claim 1, use of the support ring / 7 and the fist segment 18, which are installed in height with the aid of screw pairs 19, 20 and 29, 30, connected with the drive of the machine. 3. In the machine tool according to claim 1, use of the heads 38 carrying the machined rolls associated with the gear for even swapping. to the patent of the in-ing firm Plants Ho 47,642 Mannesmage tubes figure 1 2 Y7A5G.7 Fig.8 g 5 / | patent of the company “Plant No. 47642 of Mannesmann pipes” fig lg f lg 5 Sff 6 f7