DD301767A7 - Method for cooling lubrication during cold forming - Google Patents

Abstract

The method of cold-working cold lubrication is used in the field of metallurgy in the cold working of metallic materials, such as ironing tubes or cups, drawing wire, tubes or profiles, and reducing friction during deep drawing. The aim and object of the invention is to seek to improve the process economy by reducing machine downtime, as well as reducing tool wear, while substantially simplifying lubricant handling. This object is achieved according to the invention with a method for cooling lubrication in the cold working of metallic materials using aqueous soap solutions by sodium soap and Alkylphenolpolyethylenoxid adducts at temperatures between 20 and 90 degrees C, with a soap content between 1.5 and 15 parts by weight in the aqueous soap solution % and a ratio of the weight percent soap to alkylphenol polyethylene oxide adduct of 1: 2 to 2: 1 are used.

Description

The object is achieved with a method for Kühlschmieron in the cold working of metallic materials using aqueous soap solution by in the aqueous soap solution Natriumseifon and Alkyiphenolpolyethylenoxid adduct at temperatures between 20 and SO ⁰ C, preferably between 35 and 50 ° C, with a soap content of between 1.5 and 15 percent by weight and a ratio of the weight percent soap to alkylphenol polyethylone oxide adduct of from 1 to 2 to 2 to 1. In addition, water-insoluble metal soaps, such as calcium, zinc, iron or Kuptdrseifon, may be used in the aqueous soap solution. The inventive method can be used for cooling lubrication in the cold forming of bare or provided with lubricant carrier metallic Umformgut. It can be used to set the surface quality in terms of roughness after forming the cooling lubricant defined tempered. In a Stearatgeha ¹ in the sodium soap used of about 15 parts by mass in percent, particularly dull surfaces are obtained after the cold forming of phosphatized sheets or anderon parts when the soap-containing cooling lubricant liquid is used at temperatures between 40 and 50 ° C. For optimal use of the method according to the invention sodium soap should be used with a minimum stearate content of 13 parts by mass in percent.

Ausführungsbelsplole

1. For multi-stage ironing of CK15 brand uncoated CK15 carbon steel cartridge cases in a continuously operating rotor system, the starting blanks are pickled and phosphated.

The ironing takes place in two forming steps, wherein in both forming steps the Umformgut, dip forming tools and the manipulation with an aqueous soap lot jng containing sodium soap to 3 parts by mass in percent, is washed at a temperature between 35 and 45 ° C. The content of Alkylphonolpolvethylenoxid adduct in the aqueous soap solution is 3 parts by weight in percent.

Gegonüber a same soap solution without the addition of Alkylphenolpolyethylonoxid adduct foaming has been reduced so far that a trouble-free operation is possible. Furthermore, after machine downtime, breaks and other cases of standstill with a first cold machine dor operation can be resumed without the machine until a time-consuming process, eg. B. by spraying with superheated steam, must be freed from cooled gelled lubricant. Clogging of the lubricant-carrying pipelines no longer occurs. Less lubricant is transported from the machine to the immediately following heat treatment equipment, thereby improving the surface quality of the annealed parts. A significant advantage is the simplified handling of the lubricant that the storage and transport of the lubricant to the respective rotor system can no longer be in the mentioned state, but at room temperature.

2. The wet drawing of CK15 brand carbon steel wires of 0.6mm starting diameter in several drawing stages to 0.15mm final diameter is carried out without previously applying a lubricant carrier in a multi-wet machine using an aqueous soap solution having a sodium soap content of 5 mass parts in% and a content to alkylphenol polyethylene oxide adduct 2U 5 parts by weight in percent. The lubricant is used at room temperature. Compared with a commonly used, at room temperature still liquid sodium soap solution with 0.5 Masseantoilen in percent, the lubricity significantly improved, whereby the life of the drawing tools by 2.5 times, the pulling forces and energy consumption could be advanced by 8%.

3. Same advantages as in Example 2 are obtained in the wet drawing of wires of carbon steel brand M 55 of 1.6mm starting diameter to the final diameter of 0.3mm on a Mehrfachnaßziehmaschine, wherein the wires were provided by phosphating with a lubricant carrier layer prior to drawing , The drawing was carried out with a soap solution having a sodium soap content of 3 parts by weight in percent and a content of alkylphenol polyethylene oxide adduct of 6 parts by weight in percent at a temperature of 25 to 35 ^° C.

Claims (3)

1. A method for cooling lubricating metallic materials using aqueous soap solutions, characterized in that in the aqueous soap solution sodium soaps and Alkvlphenolpolyethylenoxid adducts at temperatures between 20 and 90 ⁰ C, preferably between 35 and 50 ⁰ C, with a sodium soap content of 1.5 to 15 mass percentages and a ratio of the mass proportions of sodium soap to alkylphenol polyethylene oxide adducts of 1: 2 to 2: 1 are used. 2. Method nac.'i claim 1, characterized in that in the aqueous soap solution additionally water-insoluble metal soaps, preferably calcium, and / or zinc, and / or iron and / or copper soaps are used. 3. The method according to claim 1 and 2, characterized in that the sodium soaps are used with a Mindeststearatgehalt of 13 parts by mass in percent. Field of application of the invention The invention relates to the field of metallurgy and is applicable to the cold working of metallic materials, in particular in the ironing of sleeves, cups or standard parts, in the aiming of wire, pipe, profiles and sheets, in deep drawing and to reduce the friction of itself rubbing parts. The method can be used in cold forming, btii the metallic material to be formed before the one to mehrstiifigon cold forming either without od or with lubricant carrier is provided. Characteristic of the known technical solutions When cold forming metallic materials, such as the ironing of, for example, sleeves, cups or standard parts, deep drawing or pulling wires, pipes and profiles, if z. B. successive forming steps in rapid succession or st .iwere Umformarbeiten be performed, Naßschmiermittei used, which exert a cooling and a cooling effect in addition. In light forming work while the Umformgut is often converted without the use of a lubricant carrier, in heavy forming processes, especially in unalloyed and alloyed steels after applying a lubricant carrier in one or more successive stages. The single or multi-stage transformation takes place using aqueous soap solutions. In general, the aqueous solutions of potash soaps are used, which are thin even at room temperature. However, they have the disadvantage that their lubricating effect does not reach that of sodium soaps. In addition, they show strong foaming in practical use, especially when they are used more concentrated. Therefore, they can not be used more concentrated to improve the lubricating effect. For cold forming processes with high degrees of deformation or the cold forming of high-strength or high-strength materials, they are therefore eliminated as lubricants. In these cases, the aqueous solutions of sodium soaps are used. In addition to the well-known disadvantage of foaming, which can lead to malfunctions, the sodium soap solutions have the crucial deficiency that they solidify above a concentration of 0.5 parts by mass in percent at room temperature to a solid gel, which serious production losses due to blockage of the pipes can occur , At concentrations below 0.5 parts by weight in percent, the lubricating effect leaves much to be desired. The aqueous sodium soap solutions are therefore used in heavy forming work sometimes in a concentration of about 2 parts by weight in percent at a temperature of 40 to 60 ^c C for lubricating. The disadvantage is that these lubricating liquids foam heavily. Conventional defoamer additives can not be used because they interfere with the reaction of the soap with the lubricant carrier and reduce the lubricating effect. Mentioned sodium soap lubricating liquids stick cold machine parts due to Gnlbildung and lead for example to the failure of moving manipulators and transfer stations. As a result of the thick liquid of such solutions, a disadvantageously high Schmieraustreg sets, the z. B. leads in direct without intermediate cleaning annealing of the drawn parts, such as blanks and sleeves, to strong surface contamination. Object of the invention The object of the invention is to improve process economics by reducing machine downtime, simplifying lubricant handling, and lubricating transport in piping while reducing forming tool wear. Explanation of the essence of the invention The invention has for its object to make a method for cooling lubrication in the cold forming of metallic materials so that the content of sodium soaps can be increased beyond the usual addition to improve the lubricity of the aqueous soap solutions and simultaneously reduces the foaming and the lubricant discharge and gelation is prevented at room temperature.