SU660760A1 - Mill for cross rolling of articles with flat wedges - Google Patents

Description

one

The invention relates to the processing of metals by pressure and can be used in the manufacture of articles such as stepped shafts.

A mill for transverse rolling of products with flat wedges is known, containing two instrumentalization devices installed in parallel guideways made as separate blocks, their movement drives, block accumulators and mechanisms for transferring the blocks from the accumulators to the machining zone and from the machining zone to the accumulators.

The disadvantage of the known mill lies in the limited technological capabilities of the mill, since the number of blocks of each working branch of the mill, as well as their length, must be strictly defined, which does not allow for processing a significant range of parts. The use of elliptical sprockets interconnected by an endless chain leads to low reliability of the mill due to chain stretching during its long-term operation, which does not guarantee the clamps to get into the blind holes of the blocks and confidently grip and move the blocks.

The purpose of the present invention is to increase the reliability of the mill and to expand its technological capabilities by changing the number of blocks and their length, depending on the profile of the part.

In the proposed mill, this goal has been achieved due to the fact that each mechanism for transferring blocks is made in the form of two coaxially mounted disks, facing one another with their working surfaces, driving the rotation of the disks around an axis, and the mechanisms of capturing the blocks mounted on the working surfaces of the disks , with the axis of the disks parallel to the guide frame.

Each block capture mechanism is made in the form of a ram cylinder with a rod, the axis of which is parallel to the axis of the disks, and a magnetic pad fixed on the ram of the ram cylinder.

FIG. 1 shows the proposed device, front view; in fig. 2 is the same, section A-A in FIG. 1 (first embodiment); in fig. 3 is the same (second embodiment).

Claims (2)

The proposed mill contains two tool holders installed in parallel rails 1, made in the form of gear racks 6 fastened on blocks, engaged with gearing drive gears 7 for moving blocks 2.-5 with tools 8 forming the workpiece 9, accumulators of blocks and mechanisms for transferring blocks from the drives to the treatment area and from the treatment area to the drives. Each mechanism for transferring blocks 2-5 is made up of perpendicular guides 1 installed in the frame perpendicularly to the rotation of two discs 10, which are fixed to the axis 11 of the turning mechanism. The disk 10 is equipped with mechanisms for capturing the blocks, which are made in the form of 1 pneumatic cylinders 12, 13, 14, 15, etc., and magnetic pads 16, 17, 18, 19, etc. rigidly fixed on the disk 10. with pneumatic cylinder brushes. The number of pneumatic cylinders and magnetic pads may vary depending on the number of blocks located on the working branch of the mill. The axes 11 of the rotary mechanisms through gears 20, 21, 22 with a common gear ratio i 1 are interconnected, which results in a synchronous rotation of the discs 10. The mill operates as follows. The workpiece 9 is fed into the working area. The drive gears 7 rotate at the same speed in one direction and move successively one after the other blocks 2 downwards, and blocks 4, 5 move upwards by means of toothed rails 6. The wedge tools 8 mounted on the blocks deform the original trimmer 9, reducing it in diameter and increasing in length, thereby forming the desired profile of the part. After the disc 10 rotates, the pneumatic cylinder 14 through the magnetic pad 18 joins block 4 with block 5 and pushes it into the engagement zone with the bristles 7, while the block 4 joins with block 5 before it engages with gear 7, which ensures backlash-free operation of the blocks during rolling. When the block 2 leaves the working area, the magnetic pad 16 captures the block 2 and the pneumatic cylinder 12 will move the block 2 down with a speed slightly higher than the speed. rolling. After the block 4 is docked with the block 5 and it is pushed into the engagement zone with gear 7 and the block 2 is undocked, the disk 10 is rotated around the axis 11 by means of gears 20-22, and the work cycle is repeated. Now the pneumatic cylinder 13 comes into operation with the block 3 located on the magnetic platform 17 and the pneumatic cylinder 15 with the magnetic platform 19, and the pneumatic cylinders 12, 14 with the magnetic platforms 16, 18 occupy the initial position. Similarly, the right branch of the camp and its upper part work. The use of the proposed mill design, due to the easily re-adjustable distance L, allows increasing or decreasing the total length of the tool (see Fig. 1). In addition, the proposed mill design allows changing the number of blocks of each working branch of the mill; this also makes it possible to increase or decrease the total length of the tool, which expands the technological capabilities of the mill (see Figs. 2, 3). The proposed mill for transverse rolling of products with flat wedges due to a change in the number of blocks and their length, as well as the use of a new mechanism for capturing and transferring blocks, improves reliability by 20% and extends the technological capabilities of the mill by increasing by more than 2 times nomenclature of processed products. Claim 1. Mill for cross-rolling products with flat wedges, containing two instrumentalization tools installed in parallel guide beds, made as separate blocks, their movement drives, block drives and mechanisms for transferring the blocks from the drives to the treatment area and from the treatment area to drives, different in that. what. In order to increase reliability and expand technological capabilities by changing the number and size of blocks, each block transfer mechanism is designed as two coaxially mounted disks facing one another with their working surfaces, which drive the drives around the axis and block capture mechanisms, mounted on the working surfaces of the disks, with the axis of the disks parallel to the guide beds. 2. A mill according to claim 1, characterized in that each block locking mechanism is made in the form of a ram with a rod, whose axis is parallel to the axis of the disks, and a magnetic pad attached to the ram of the ram.