SU1234021A1 - Apparatus for producing toothed rims - Google Patents

Description

The invention relates to the processing of metals by pressure and can be used in the manufacture of gear rims of any module.

The purpose of the invention is to expand the technological capabilities of the device.

FIG. 1 shows a device for the manufacture of gear rims, a general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 is a section BB in FIG. one.

The device contains a frame 1, on which the left 2 and right 3 pillars are connected, connected by stitches 4. The left pillar 2 contains a spindle 5 with a rotating drive (not shown), and on the right pillar 3 there is a housing 6 in which a die 7 is mounted on bearings. whose axis is parallel to the axis of the spindle 5. The matrix 7 has teeth on the outer and inner surfaces, with the number of teeth on the inner surface greater than the number of teeth of the roll crown. In the housing 6, an axis 8 is fixed, on which a gear unit 9 is mounted, which are engaged with one side teeth on the outer surface of the die 7, and on the other side with a gear wheel 10 mounted on a pinch 5 and provided with an annular protrusion 11. In spindle 5 mounted collet 12.

On the right pillar 3 there is mounted a slider 13 connected to the rod 14 of the cylinder 15 and having the possibility of reciprocating movement in a direction parallel to the axis of the matrix 7. On the slider 13 a body 16 is installed with the possibility of angular rotation in the plane of the slider 13, while the position of the body 16 is fixed by bolts 17. In case 16, a spindle 18 is mounted on rolling bearings and used as a head of a deforming tool. The spindle 18 is equipped with a roller 19, which is made in two stages, each stage (20 and 21) of which is formed by two cones with a common base, and the diameter of the common base of the cones of the second stage 21 of roller 19 is determined from the ratio

02 D, + (8-10) t,

where DI is the diameter of the common base of the cones

first stage 20 of roller 19; m-module of the internal tooth of the matrix 7.

The angle a at the top of the front cone of each step, determined experimentally, is chosen to be 160-176 ° depending on the conditional yield strength of the crown material, and the angle p at the top of the rear cone of both steps 20 and 21 is performed in accordance with the expression p 180 ° .

A cylinder 22 is mounted on a stand 3, the rod 23 of which is connected via a lever 24 to a slider 25 located between the stands 2 and 3. On a slider 25 it is possible

five

Vrasheni on the axis 26 mounted circular knife 27.

The device works as follows.

In the initial position, the slider 13 is in the rearmost position. The spindle 18 is set so that between the axis of the spindle 18 and the axis of the spindle 5, i.e., the axis of the matrix 7 forms an angle v. definable

from the relation f about R this

0 the cones of the treads 20 and 21 of the roller 19 are installed parallel to the axis of the matrix 7. For this, the housing 16 is released by means of the bolts 17 and turned to align the marks applied to the housing 16 and the slider 13, after which the housing 16 is fixed with bolts 17.

The slider 25 with the knife 27 is in its lowest position. The bar blank 28 is inserted into the collet 12, extending beyond the end of the annular protrusion 11 of the gear train 10 to a predetermined length determined by the equality of the volume of the exposed end of the blank 28 to the volume of the finished ring gear. The power cylinder 15 is turned on, and the slider 13 together with the housing 16 and the stem 18 are mixed to the extreme front position until the forming cone of the front cone of the stage 20 of the roller 19 comes into contact with the end of the workpiece 28. After the roller 19 touches the end of the workpiece 28, the spindle 5 drives the spindle 5. with the collet 12 and the workpiece 28 begin to rotate due to friction forces between the workpiece 28 and the roller 19. The latter also begins to rotate and, under the action of the force developed by the cylinder 15, moves inside the workpiece 28, forgiving the cylindrical cavity in it. Wherein

 a part of the metal of the workpiece 28 is moved under the action of the deforming roller 19 in the radial direction until the teeth hollows are completely filled on the inner surface of the die 7.

Since matrix 7 is also given

rotating simultaneously with the workpiece 28 from the shpindles 5 through the wheel 10 and the gear unit 9, then the matrix 7 and the workpiece 28 will be synchronous, which ensures the precise division of the formed teeth on the workpiece 28 along the circumferential liiary.

When the billet 28 is deformed, the metal moves axially until it stops at the stage 21 of the roller 19 and the annular protrusion 11 of the gear wheel 10.

After forming the ring gear 29

The Q cylinder 15 is reversed, the slider 13 together with the housing 16 and the spindle 18 are returned to the rearmost position, and the roller 19 leaves the workpiece 28. The cylinder 22 is turned on, the rod 23 of which rotates the lever 24, resulting in

5, the slider 25 moves to the foremost position.

Simultaneously with the slider 25, the knife 27 is moved to contact with the workpiece 28.

As a result of the friction forces arising between the knife 27 and the workpiece 28, the knife 27 also begins to rotate around the axis 26 while simultaneously moving in the direction perpendicular to the axis of the workpiece 28, cutting off the finished teeth 29 from the workpiece 28. Then the cylinder 22 reverses and slider 25 s knife 27 returns to its original position. The drive of the spindle 5 is turned off, and the spindle 5 with the collet 12 and the workpiece 28 is stopped.

The finished rim 29 is removed from the die 7, the collet 12 is expanded by means of a drive, the workpiece 28 again extends beyond the annular protrusion 11 of the wheel 10 by a predetermined length, and is clamped in the collet 12.

The cycle is repeated.

The use of the proposed device for the manufacture of gear rims makes it possible to obtain gear rims of any module, not only from a pipe tube, but also from one piece.

bar stock.

t

2

Bb

FIG. five

Compiled by M. Lastochkina

Editor A. OgarTehred I. VeresKorrektor V. But ha

Order 2679/10 Circulation 655Subscription

VNIIPI USSR State Committee

for inventions and discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPL "Patent, Uzhgorod, st. Project, 4

Claims (1)

DEVICE FOR MANUFACTURE OF CENTRAL CIRCULARS, comprising a housing, a workpiece spindle installed therein and a die with a serrated inner surface and a head with a deforming element in the form of a roller, characterized in that, in order to expand the technological capabilities of the device, the die is made with a serrated outer surface and kinematically connected to the spindle for the workpiece, and the roller is made of two stages, each step of which consists of front and rear cones with a common base, and forming front and rear their cones respectively perpendicular and parallel to the workpiece spindle axis and the distance from the front vertex of the cone forming the first stage to the second stage adjustable cone is equal to the minimum distance from the spindle axis to the workpiece to the root circle of the teeth on the inner surface of the die. <rig.1