SU1669627A1 - Mill for rolling gear wheels - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used for rolling gears on cylindrical billets. The purpose of the invention is to increase productivity by reducing the time for machine readjustment. The mill for rolling gears contains a frame and two knurling rolls. One of the rolls is mounted on the frame with the possibility of radial movement and is kinematically connected with the workpiece through the fission guitar, and the other is rigidly mounted on the frame. The mill is equipped with two fixed and one movable blocks of gear wheels. The body of the guitar consists of two parts, one of which is fixed on the frame, and the other - with the possibility of radial movement in the horizontal plane. Each of the gears of the fixed blocks is installed with the possibility of pairing with the wheels of the movable block. 1 hp ff, 1 ill.

Description

The invention relates to the processing of metals by pressure and can be used for the production of cylindrical gear blanks by rolling in a hot condition.

The aim of the invention is to expand the technological capabilities and increase productivity by reducing the time for mill changeover during the transition to the processing of workpieces of various sizes.

The drawing shows the kinematics of the mill,

The rolling mill for gear wheels contains a drive 1 mounted on a frame (not shown), connected by a gear with a transfer gear 2 connected kinematically with gear 3 and 4, on the vertical shafts of which interchangeable toothed rolls 5 are mounted

and 6. Gearbox 3 is fixed on the frame (not shown) motionless, and gearbox 4 is mounted with the possibility of reciprocating movement relative to gearbox 3. Between gearboxes 3 and 4, the central frame 7 is movable along the bed guides, carrying the fixed lower frame and movable from the cylinder 8 spindles intended for clamping the workpiece 9. and kinematically connected by means of a rack and pinion gear 10c with a support (not shown). Frame 7 contains a gearbox with a split housing 11, the drive shaft 12 of which is connected by a cardan gear 13 to the vertical shaft of the gearbox 3, and the driven shaft 14 is mounted coaxially with the upper spindle and kinematically connected to it by a movable joint. To change

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the intercenter distance between the shafts 12 and 14 is provided with a power cylinder 15.

On the drive shaft 12 mounted stationary block of gear wheels 16-19, each of which has a number of teeth, a multiple of the number of teeth of the corresponding replaceable gear roll. A shaft of gears 20, 21, and others is mounted movably along a shaft 14 with such numbers of teeth that, in pairing with gear wheels 16-19, of the drive unit, provide the same gear ratios as between the pairs of knurled roller and the gear part rolled by it .

The conversion of the mill is carried out as follows.

In accordance with the number of teeth of the rolling wheel, shafts 12 and 14 are separated by a cylinder 15 for a certain distance, after which cylinder 22 moves wheel block 20, 21 along shaft 14 to a position in which one of the gear wheels 20 or 21 is set up opposite one of the wheels on the shaft 12, for example 18. Then, using a cylinder 15, the selected pair is engaged and locked in this position. When selecting the required pair, the drive wheel is taken with the number of teeth equal to or a multiple of the number of teeth of the knurling roll, which should be carried out by rolling the teeth, into the driven one - with the number of teeth equal to or a multiple of the number of teeth of the rolled part, i.e. equal gear ratios are ensured in the gearbox pair and in the knurled roll and the rolled part. When the mill is put into operation, the rolls 6 and 5 and the workpiece 9 rotate with the ratio of their teeth from the engaging pair of gears of the gearbox. When the caliper and frame are radially moved, the rolls 5 and 6 are pressed into the workpiece, forming a tooth on it. At the end of the knurling, the roll 5 returns to its original position, while after release

products from spindles on them stack the next billet. Toothed blocks are replaced only when the range of rolled gears is changed by other types of rolls.

The use of a mill for rolling gears reduces the changeover time, improves service conditions and makes more efficient use of its technical capabilities.

Claims (2)

1.Stan for rolling gears, containing a frame, two knurling rolls, one of which is mounted on the frame with the possibility of radial movement, the central spindle under the workpiece, kinematically connected with the knurling rollers through the gears of the dividing guitar, mounted on the driving and driven shafts in the guitar body, characterized in that, in order to increase productivity by reducing the time for mill changeover, the dividing guitar driving shaft kinematically connected with one of the knurling rolls, and the mill is equipped with two fixed and one movable gear wheel blocks, the guitar body being made of two parts, one of which is mounted stationary on the frame, and the other - with the possibility of radial movement in the horizontal plane, with the movable unit mounted on the driven shaft of the guitar with the ability to move along its the axes, two fixed blocks are placed on the driving shaft, and the latter is mounted in the movable part of the guitar, with each of the gears of the fixed blocks being mounted with the possibility of pairing with each of the wheels of the moving block of the driven shaft. 2. Stan according to Claim 1, characterized in that. that the driving shaft of the dividing guitar is kinematically connected with one of the knurling rolls through the propeller shaft. 15