SU884810A2 - Rollers for winding screw conveyer spirals - Google Patents

Description

(54) ROLLS FOR SPRAY SCREWS

I

The invention relates to the processing of metals by pressure and can be used in agricultural engineering and other areas of the national economy.

According to the main author. St. No. 667302 are known rolls for winding spirals of augers used in agricultural engineering and other areas of the national economy. These rolls contain working tools mounted on the drive shafts, having cylindrical and conical parts, axial movement limiters of the tools mounted on the drive shafts, made in the form of lock washers, nuts and locknuts, the drive shaft is made with a tapered shoulder, and the tapered part of the working tool is made in the form of a set of conical rings of different diameters freely mounted on the shaft, the end of the conical ring with the largest diameter being installed with the possibility of interaction with a smaller ortsovoy conical shoulder surface and the total width of the conical collar and tapered rings 15 is defined by the relation I {0.010 + 03) B, where I - total width of conical rings B - width puncturable

stripes. Moreover, the rolls are made with axial and connected with them radial-lubricating holes having an exit to the zone of placement of the conical rings (I A disadvantage of the known device is the large axial forces that occur during the shaping process. In addition, as shown by tests, the forming strip moves from the deformation zone and because of this, the constancy of the transverse profile of the screw is broken.

The purpose of the invention is to increase production and improve the quality of products.

To achieve this goal, in rolls containing working tools mounted on drive shafts, they have (5 cylindrical to tapered parts, axial movement limiters for tools mounted on drive shafts made in the form of lock washers, nuts and lock nuts; drive shaft is made with a tapered shoulder and the conical part

20 working tools made in the form of a set of conical rings of different diameter, freely mounted on the shaft, and the end of the conical ring with the greatest

diameter is installed with the possibility of interaction with the smaller end surface of the conical collar, and the total width of the conical collar and conical rings is determined from the ratio 1 15 +

(0,010,03) In, where I - the total width

conical rings; B is the width of the rolled strip, the rolls are made with axial and radial lubrication holes connected to them, having an outlet to the zone of placement of conical rings, the lock washer is rigidly fixed on the drive shafts, and the sum of the radii of these washers is equal to the distance between the axles of the drive shafts, The front side of the lock washer facing the set of conical rings is made with a notch, and thrust elements are installed between the end surface of the lock washer and the conical ring.

FIG. 1 shows rolls, longitudinal section; in fig. 2 shows section A-A in FIG. one;

Each of the rolls consists of a shaft 1 with a tapered bead 2, for continuing the generator of which the rolling bearings 3 with oblique outer rings are freely mounted on the shaft. The latter between themselves, the end face of the collar 2 and the lock washer are contacted by means of stop elements arranged in the form of balls 4 located in the annular grooves of the collar 2, the outer rings of the bearings 3 and the lock washer 5, which is rigidly mounted on the shaft 1. On the projecting part of the washer 5, on the side of the feedthroughs, there is a radial notch 6, with the help of which the molding strip 7 is captured and fed into the deformation zone. In addition, this washer limits the movement of the strip in the axial direction of the rolls, which ensures the constant transverse profile of the auger and the compensation of the axial force.

An oil 8 and an aperture 9 are used to supply lubricant to the friction zone. Such a lubrication system ensures the manufacturability of the design and the absence of stress concentration. The forming bearings 3 are pressed against the lock washer 5, a nut and a lock nut.

The work of the rolls is carried out as follows.

When the rolls rotate in different directions, a forming angle of inclination J is formed between them, into which the strip 7 from the coil is fed. The strip is caught by the rolls 2 - and the cut teeth of the end face (notch) 6 of the washer 5. This leads to a decrease in the slippage of the rolls along the strip, a decrease in the shaping force, an increase in strength, and a constant cross section.

As a result of the research carried out, it has been established that the rolls, in comparison with the known device, provide a reduction in the shaping force, the axial shaping force decreases, the labor productivity and the quality of the rolled products increase.

Claims (1)

Invention Formula Rolls for winding spirals of augers, according to ed. St. No. 667302, characterized in that, in order to increase productivity and improve the quality of products, the lock washer is rigidly fixed on the drive shafts, and the sum of the radii of these washers is equal to the distance between the axles of the drive shafts, with the end face of the lock washer facing the set of conical rings , made with a notch, and between the end surface of the lock washer and the conical rings mounted thrust elements. Sources of information taken into account during the examination 1. USSR author's certificate No. 667302, cl. B 21 N 3/12, 01.06.78 (prototype). at ill i .f