CS244603B1 - Method of elastic elements calibrating especially of elastic washers and device for application of this method - Google Patents

Abstract

The invention relates to a method and an apparatus for calibrating spring elements, in particular spring washers, by plastic deformation, and solves the problem of the dimensional calibration of these elements in the direction of their spring deflection. The calibration method according to the invention consists in that the spring elements (6) are drawn into a free space (3) between two cylinders (1, 2) rotating in opposite directions and are deformed continuously counter to the direction of the spring force by the pressure of the cylinders (1, 2) at the narrowest point of the free space. The apparatus comprises two rotatable cylinders (1, 2) which together form a free space adjustable by means of a stop (4), the cylinders being sprung relative to one another by means of a spring (5). <IMAGE>

Description

Vyiniex and e relate to the mass production of elastic elements, in particular resilient washers in metallurgical secondary production solve the problem of the rosaer calibration of these elenents in the direction of their resilience.

The method of calibration according to the invention consists in that the elastic elements are drawn into the gap between the two rotating rollers and are progressively plastically deformed by the pressure of the rollers against the amira of their spring in the narrowest meshes. The device then consists of two rotary cylinders forming a mos, the gap adjustable by each other, and the cylinders are mutually suspended.

The invention relates to the method of calibrating elastic elements, in particular spring washers (ČSN 02 1740, ČSN 02 1741} by calibrating the dimension in the direction of springing, that is to say in the case of spring washers by shear calibration by plastic deformation.

The invention also relates to an apparatus for calibrating elastic elements to a prescribed value of deformation in the direction of spring.

To date, resilient washers are made by cutting a ring from a wire or by cutting a wound spiral so that a non-closed ring or other shape of the washer is formed in that the ends of the wire are irregularly offset at the cutting point.

The shear calibration to a uniform measure is either not carried out at all or is carried out by placing the mat under the punch after shearing and plastically deforming by pressing.

The disadvantage of uncalibrated washers is their inconsistent size and tendency to so-called "flocking", in which several washers are interconnected in the chain at a large shear point, especially during mechanized transport eg by vibrating conveyors. part of production.

The disadvantage of pressing calibration is that many manipulation movements, especially reversible movements, and thus very low labor productivity, make it impossible to use productive methods of manufacturing flexible washers, in particular the method of cutting an unwound spiral.

These drawbacks are overcome by the method of calibrating the elastic elements, in particular the elastic washers, according to the invention, which is characterized in that the elastic element is gradually exerted a pressure in the direction opposite to the elastic element by drawing into the narrowest point of the gap against the rotating cylinders.

The method according to the invention is realized by a device according to the invention, which consists in that it consists of two rotating cylinders, at least one of which is driven. The rollers are spaced apart and form a gap. The gap may be adjustable by a stop and the rollers may be spring-loaded to each other.

The method according to the invention makes it possible to calibrate the spring elements, in particular spring washers, with virtually unlimited productivity, since they are freely poured between the rollers. This makes it possible to utilize even the most productive methods of producing the elastic elements.

In the case of spring washers, their chaining is also prevented. In the device according to the invention, the value of plastic deformation can be adjusted while the machine is running and in more precise tolerances than the hitherto known technology for calibration of elastic elements, especially of elastic washers.

The device according to the invention is less demanding for repair and maintenance, in the case of wedging of two washers (or more) one does not destroy the devices or mechanisms or the necessity of realigning them.

The device does not require the production of complex form tools for cutting calibration and the necessary mechanisms for the individual oriented transfer of the resilient element below the calibrated tool.

The figure shows one possible embodiment of the device according to the invention, in a side view.

The rollers 18 create a gap J. The minimum set value of the gap J is given by a stop ± resting on the bearing housing of the cylinder 6. The spring 2 ensures a constant pressure of the roll 6 against the stop A and thus the mutual position of the roll 1 and the roll 6. The roller 1 and the roller 2 are inconsistently chased, thus creating the conditions for carrying the individual products to the limits. war.

The non-vibrated elements, e.g. spring washers, fall individually between cylinder 1 and cylinder 2 into the gap J. It can be adjusted while the machine is running. The gap size J is chosen such that the plastic deformation in the direction of springing achieves the desired value of shearing of the spring washer or deformation of the elastic element.

The spring 1 is so strong that a plastic deformation can be induced in the elastic elements, e.g. If two washers are wedged on each other, the device will not be destroyed, but the spring% will be less and the cylinder 1 will not move away from the cylinder 2.

Theoretically, the elastic elements can be calibrated at any stage of its production, thereby also placing the calibration device at any point in the line. However, for many reasons, it is most advantageous to calibrate the pads not yet heat-treated and to place the calibration device right out of the mower, from where the pads fall directly between the calibration cylinders.

Untreated pads are much easier to transform, and the pads that have been vibrated directly from the mower no longer have the chance to be shredded in the next production process.

The desired value of the calibrated shear is most easily achieved experimentally, i.e. by adjusting the stop 6 by adjusting the gap J at which the calibrated shims of the desired shear have already started.

It is also possible to use not only spring washers, but also other spring elements such as tall springs.

SUBJECT OF THE INVENTION

Claims (4)

CLAIMS 1. A method of calibrating elastic elements, in particular elastic washers by deformation, characterized in that the elastic element is subjected to successive pressure in the direction opposite to the elastic element by pulling into the narrowest point of the gap of the counter-rotating rollers. Device for carrying out the method according to claim 1, characterized in that it is composed of two rotatable rollers (1, 2) forming a gap (3) between them, at least one of the rollers (1, 2) being driven. Device according to claim 2, characterized in that the gap (3) between the rollers (1, 2) is adjustable by a stop (4). 4. Device according to claim 2, characterized in that the rollers (1, 2) are cushioned. 1 drawing