SU757300A1 - Apparatus for working balls - Google Patents

Description

The invention relates to abrasive machining and can be used in the bearing industry.

There are known devices for processing balls between a driving disc with grooves in a spiral of Archimedes and a clamping disk with grooves intersecting with the said grooves of a driving disk [1].

The disadvantage of these devices is the low precision of the processing of the balls, due to the small areas of slip of the contact surfaces and low velocities of relative slip.

The purpose of the invention is to improve the accuracy of processing balls.

This goal is achieved by the fact that the angle of crossing of the grooves is selected from the condition of constant approximation or periodic equality of 90 °, and the grooves of the pressure disc are made according to the curves described by the equation

p 2, ^ h> 2 _{= c} where p is the radius vector;

ί - the base of the natural logarithm; φ is the angle of the radius vector;

2

C is a constant coefficient determined depending on the selected crossing point of one of the turns of the Archimedes spiral with an orthogonal curve.

₅ In addition, in order to ensure the possibility of adjusting the angle of crossing of the grooves, the device is equipped with straps installed on the clamping disk, in which grooves are made.

FIG. 1 schematically depicts a common

U kind of device; in fig. 2 - section A — A in FIG. one; in fig. 3 - section B — B in FIG. one; in fig. 4 — section B — B in FIG. 2 and 3.

The device contains a drive disk 1

' ⁵ with an ν-shaped groove 2 printed on its butt-end in an Archimedean spiral, a clamping disk 3 with grooves 4 or grooves 5 printed on its butt-side, made in curves that satisfy the equation in rh articular rh ¹ ? ² = C, or clamping disk 3 with strips 6 and Y-shaped grooves 4 and 5 with the ability to adjust the crossing angle, for example, screws 7 around the axes 8. The device is supplied with power

757300

mechanism 9, providing the flow into the working area and the acceptance of her balls 10.

The device works as follows.

The balls 10 from the feed mechanism 9 through the channels 11 are fed from above into the diverging grooves 4 or 5 of the clamping disk 3 ⁵ by gripping the archimedes of the driving disk 1 with the U-shaped groove 2 of the helix as it rotates clockwise with the helix direction made in accordance with FIG. 3. ₄₀

The Y-shaped groove 2 rotates the drive disk 1 carries the balls 10 into the grooves 4 or 5 of the pressure disk and moves them from the center of the disks 1 and 3 to their periphery. When the balls move in the grooves 2, 4 or 5, they are processed at <ί increased sliding speeds at the contact points due to the large crossing angle of the grooves 2, 4 or 5, close to or equal to 90 °.

In the process of processing the balls to the pressure disc 3, a force P is applied in the direction of pressing the balls between the grooves.

After the balls exit the grooves of the disks 1 and 3, they are guided by the feeding mechanism 9 for re-passing into the channels and 11, etc.

Since the grooves 4 or 5 do not allow the spiral groove 2 to move the balls 10 by rolling, the balls are processed at the speeds of relative sliding of the contact points of the Y-shaped grooves and balls ³⁰ , which is close to the linear speed of the contact points of the spiral groove 2. In addition, slip is carried out in at least three contact points of the grooves.

As a result, the processing _3ί INDICATES ensured a significant increase in the area of sliding contact surfaces, thus reducing the specific pressure of the beads and, consequently, increase the processing accuracy. Reducing the specific pressure allows reducing the weight and dimensions of the device.

Crossing the drive and hold-down grooves under constantly changing

an angle approaching and periodically equal to 90 ° when the pressure disc grooves are made along curves orthogonal to the Archimedes spiral increases the accuracy and productivity of processing due to the appearance of additional axes of ball spinning.

The implementation of the grooves on the clamping disk in the slats installed with the possibility of adjusting the angle of crossing of the grooves allows you to control the process by choosing the optimal processing parameters depending on the diameters of the balls.

Claims (3)

Claim 1. A device for processing balls between a drive disk with grooves in a spiral of Archimedes and a clamping disk with grooves intersecting with the aforementioned grooves of a driving disk, characterized in that, in order to improve processing accuracy, the angle of crossing of the grooves is selected from the condition of constant approximation or periodic equality 90 ° 2. Device by π. 1, characterized in that the grooves of the pressure disc is made according to the curves described by the equation ? ² _{> ί4} .2 _{= С} where p is the radius vector; C - the basis of the natural logofim; φ is the angle of the radius vector; C is a constant coefficient determined depending on the selected crossing point of one of the turns of the Archimedes spiral with an orthogonal curve. 3. Device by π. 1, characterized in that, in order to ensure the possibility of adjusting the angle of crossing of the grooves, it is provided with straps installed on the clamping disk, in which the grooves are made.