SU1456459A1 - Process lubricant for cold metal working - Google Patents

Abstract

The invention relates to lubricating compositions, in particular technological lubricants for cold metal forming, which can be used on rotary conveyor lines in engineering production. The goal is to simplify the machining process and increase tool life. The lubricant contains, wt%: polyacrylamide 0.1-2.0; alkali metal salts of higher fatty acids, lot 0.5-2.0; the saponified waste from the process of manufacturing poly-esters obtained from rosin-based 0.2-2.0; water the rest. New o6ecnei phosphate-free grease cures the same tool life as a phosphate sub-lubricant grease. 2 tab. (/

Description

one

The invention relates to process lubricants for cold metal forming and can be used in engineering production on rotary conveyor lines, in particular, during calibration. and deep drawing with thinning nok steel products.

The aim of the invention is to simplify the process of processing by eliminating the preliminary carrying of the phosphate coating on the surface to be machined and increasing the tool life.

Polyacrylamide is used to prepare the lubricant; alkali metal salts of higher fatty acids (organic soap) and saponified waste of the process for the production of rosin-based polyesters.

The specified waste has the following composition, wt.%:

Resin acids tO-45 Bulk and unsaturated fatty acids 0.2-0.5 Maleic anhydride 0.5-10.0 Centaerythritol 0.5-8.0 Glycerin-1.0-10.0

Water 1.0-20.0 Derivatives of the indicated components Else, Waste used to prepare the technological lubricant proposed is obtained in the production of polyesters.

In the process of producing polyesters, volatile fractions which are waste products are removed by vacuum stripping. In its composition it is

bold, low molecular weight alkyd resins, precursors and water.

Below are the physico-chemical properties of the waste used:

Appearance

Specific mass, g / cm

Kinematic viscosity at 50 ° C

Homogeneous mass in dark brown

1.2

80-100

150-220

40-90

The number of saponis,

mg KOH / H

Acid number, mg KOH / G

The proposed lubricant is prepared as follows.

Pour water into a 1.5 liter vessel at 90-95 ° C and dissolve the soap in 1.5-2 hours. The solution is cooled to 50-70 ° C and the saponified waste of a rosin-based polyester production is added.

Previously, the waste used is heated to 80-90 ° C in a heat-resistant glass and a 15% aqueous solution of caustic soda is added. The mixture is stirred and heated 1-i, 5 h at 100-130 ° C.

Into the resulting emulsion, cooled to 25-40 ° C, pour in an aqueous solution of polyacrylamide and mix until a homogeneous mixture is obtained. Get grease milky with a faint smell of rosin, its pH is 8-9, the density of 1.1-1.2 g / cm.

The compositions of lubricants are given in Table 1. The composition of known lubricants is also given there.

Lubricants were tested during deep-drawing operation with wall thinning on a K-10 semi-automatic press. Cylindrical semi-finished products from steel 08 YuA were subjected to the stamping, the suggested lubricants were used without preliminary

body coating of semi-finished phosphate sub-lubricating coatings. A known lubricant (composition 1) was tested with and without the use of phosphate coatings. The test results are given in table. 2

As follows from the obtained results, the proposed lubricant for the operations of cold volumetric stamping of steels (deep drawing with wall thinning, calibrated through the mandrel) without the use of a phosphate coating provides the same durability of the tool as the lubricant known

Only with the use of phosphate lubricating coatings. Thus, the proposed lubricant allows us to simplify the technology of cold bulk forming of steel by eliminating the phosphatizing step, and also significantly increase tool life.

Claims (1)

Invention Formula Technological lubricant for cold pressure treatment of metals, containing water, polyacrylamide and co-PI alkali metals of higher fatty acids, characterized in that, in order to simplify the process of processing and increase tool life, the lubricant additionally contains saponified waste of the process for the production of polyesters obtained on the basis of rosin, in the following ratio, wt.%: Polyacrylamide 0.1-2.0 Alkali metal salts of higher fatty acids 0.5-2.0 Saponified waste from the production process of rosin-based polyesters, 2-2.0 Vodarstalnoe 514564596 Table 1 Composition, wt.% grease Polyac- b) Sha ni-Graphite Omynny Water rilamide garbage waste of minerals and higher fat production on acid rosin 1224 to do100 22 2-2Do100 3 0.1 0.5-0.2 to 100  1. 0 1.0-1.0 to 100   -t r-m J V .. J table 2 Composition Phosphate-free P-phosphate-based lubricating grease coatings Effort Persistence Effort Stable - extrusion - deforming - extruding, kN of matting, kN matrices (number of products to the bully) 115.6 to 10 16.0 1000 215, - 315, 416, Compiled by E.Ponomareva Editor G.G.ber Tehred M.DidykKorrektor G. Reshetnik Order 7523/22 Circulation 446 Subscription VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, st. Project, 4