DD154334A1 - METHOD FOR LUBRICATING THE PULLING MACHINE IN WIRE DRAWING MACHINES - Google Patents

Abstract

Process for lubricating the drawing handle in wire drawing machines, especially in wet drawing, work with a fixed lubricant mixture, for example with calcium stearate dissolved in trichlorethylene or benzene. In the case of drawing machines equipped with lubricant chambers before the single train, which can be emptied or flooded during operation, the lubricant concentration is additionally varied according to the present invention.

Description

Title of the invention

Method for lubricating the drawing handle in wire drawing machines

Scope of the invention

The invention finds application in wire drawing, especially in the wet drawing of wires

Characteristic of the known technical .. solutions

When wet drawing wires, the wire is drawn through a container of liquid lubricant and fed into the die. To improve the quality of the drawn wire, the lubricant is also sprayed directly against the die. "Also known are pressure chambers, in the outlet openings of the dies are arranged» Also, this is to ensure * that as intensive as possible lubrication of Ziehhols <> It is been proposed _$ to make the lubrication system in thermoforming machines variable by the forming is well drawn in a train by one or more successively arranged chambers, wherein at least one of said chambers selectively with a liquid lubricant, wel contains ~ ches a solid or semi-solid lubricant , flooded or empty. The Umformgut'wird thereby subjected in one or more chambers of a forming, wherein the flooding or emptying of the chambers before or during the forming process is carried out, "Here, the liquid prepared lubricant is fed via pumps and piping either the chambers or withdrawn, as it Zic-h technology requires ^

Bs is object of the invention, a further quality improvement effect on the final product to nehmeη ₀

Explanation of the essence of the invention

The object of the invention is to be able to control the lubrication intensity as a function of the material or molding properties of the material to be converted during the forming process,

According to the invention, this object is achieved by the flood

of the chambers the lubricant concentration in the lubricant

is varied depending on the respective forming conditions o ¹

It is also part of the invention _s that the flooding or emptying of the chambers and the variation of the lubricant concentrate ion is made during the forming process according to a program tuned to the respective Uniformly program _o ^!

It also belongs to the invention that the variation of the lubricant concentration is carried out step by step, by connecting the chambers to a plurality of lubricant reservoirs with different lubricant concentrations during the flow through a pumping and piping system

Furthermore, part of the invention that the variation of the lubricant concentration is carried out continuously, wherein the chambers are connected to a mixing tank during flooding, in which by means of a stirrer or a similar mixing device from supplied lubricant concentrate and solvent, a lubricant with the required lubricant concentration is mixed

Finally, it is part of the invention that the adjustment of the lubricant concentration via an automatic process control takes place _? the thickness of the lubricant layer forming the measured value on the drawn wire ₀ ^:

Ausführungsb eispie1

Example 1

On a drawing machine, steel wire is pulled through a device consisting of five juxtaposed chambers for forming. ₉ In the partition wall between the second and third chambers and at the end of the fifth chamber, a working drawing stone is arranged. The chambers can either be empty or with a liquid lubricant be operated flooded, wherein the switching is performed before the start or during the forming process ₀ as a lubricant is used, a liquid, in this example consisting of calcium stearate as a lubricant and trichlorethylene as a solvent _e the lubricant concentration in the lubricant is before starting the device and / or During the working process, the device can be set to the value required for effective forming. For this purpose, the device is connected to three storage containers by means of a pumping and piping system and socket cocks, in which lubricant varies with each other lubricant concentration * In this example, the lubricant concentration has been chosen to be 8j 12 and 15% by weight

Example 2

Hereby, the apparatus described in Example 1, which consists of five chambers, is also used instead of the three lubricant reservoirs and the socket valves. Example, however, a first container with a lubricant concentrate and a second with the solvent present in a mixing vessel in which there is a stirrer and which is connected to the two aforementioned containers via a pumping and piping system, the required lubricant concentration is adjusted and the lubricant of there, the setting is made on the determined density of the lubricant and can be done with an automatic process control c Ss is also possible _f the thickness of the lubricating

ylene _o; to determine on the drawn wire and to use this measurement to establish the required lubricant concentration ₀ As a lubricant concentrate, a liquid is used which contains as a lubricant 25 weight percent Kalziuinstearat in trichlorethylene middle layer as the solvent to adjust the time required for forming lubricant concentration also Trichloräth serves

The method according to the invention is particularly adaptable to the different transformation conditions and required product qualities occurring in practice with very little technological conversion effort. It allows maximum utilization of the good properties of lubricants which are present in a liquid.

With these properties of the method, additional power reserves can be tapped in wire drawing and an increase in the forming and forming speeds possible With regard to the required product qualities can be easily with the variation of the lubricant concentrate according to the invention ion thickness and control the hydrodynamic properties of the lubricant film and thus also the thickness of the residual lubricant film remaining after forming on the Umbilical? with a high lubricant concentration, thick lubricant films and wire qualities with a matt surface can be achieved. On the other hand, low concentrations result in thin lubricant films and bare products ₀

Claims (1)

It is in the offing 1 »Method for lubricating the drawing handle in wire drawing machines, in which the material to be formed is pulled in one go through one or more chambers arranged at least partially equipped with working pull stones, wherein at least one of the chambers optionally with a liquid lubricant, which is a solid or contains semi-solid lubricant, flooded or .leer operated, characterized in that the flocculation of the chambers, the lubricant concentration in the lubricant is varied depending on the respective forming conditions, / 2β method according to item 1, characterized in that the flooding or emptying of the chambers and the varying of the lubricant concentration during the forming process 1.5 after, is made to a tuned to the respective forming conditions program ₀ ^; 3ο method of item 1 Direction 2, _{characterized}} that the variation of lubricant concentration is carried out stepwise by the chambers are connected concentration for flooding via a pumping and piping system to a plurality of lubricant reservoir with different lubricant ·. 4 * Method according to item 1 or 2 _S, characterized in that the variation of the lubricant concentration is stepped 25 'is carried out, wherein the chambers are connected during flooding to a mixing container in which a lubricant with the required lubricant concentration is mixed by means of a stirrer or a similar mixing device from supplied lubricant concentrate and solvent ₀ 5 © Method Nach-Punkt 4 ₅ characterized in that the adjustment of the lubricant concentration takes place via an automated Proseßsteuerung _s wherein the thickness dei? Lubricant layer on the drawn wire made the reading ¹