SU1404229A2 - Method of producing parts - Google Patents

Abstract

The invention relates to man-made construction, and is referred to technologically made carrier parts of a manshn. The goal is to improve the quality of the parts produced. To achieve this, it is not possible, in the course of the extrusion process, to change the sheath of perforated sheet steel with sprayed coating from the side of its working surface with a wear-resistant layer. Due to this treatment, no removal of the coating from the part occurs during operation.

Description

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The invention relates to mechanical engineering, can be used in the manufacture of supporting parts of railway rolling stock and is an improvement of the invention according to the author. St. No. 1278172.

The aim of the invention is to improve the quality of the parts produced.

The method of manufacturing parts is implemented in the following manner.

The part after casting, cleaning and heat treatment is strengthened by static loading according to the operating scheme until residual plastic deformations in the most stressed zones of 0.1-0.3%, while simultaneously hardening on the supporting surfaces, thermosetting is applied by direct pressing a thermoplastic polymer coating, heated to a flowing state, and a retarded jacket, made in the form of a sheet material with the required properties from the side of the working surface, remaining after pressing on the support surface areas. After the polymer material has cured, the part is unloaded and without subsequent, mechanical processing is used in its operation.

Example. In this way, the manufacture of the bogie beam of a freight car truck is made. The nadressor beam is cast from 20G1FL steel in a sandy-clay single form so that at the places of the coating (base surface of the plate) a corrugated surface is obtained with the height of the projections up to 2 mm, which increases the adhesion of the polymer coating to the part. After shot blasting and normalization at 930 ° C, the chipping and repair of casting defects is performed. Then the bogie bolster is installed by the spring surfaces of the spring assembly on the press table. The preloading is carried out according to the operational scheme up to the load of the elastic limit of the part constituting 1720 kN. At this load, the actual deviation of the base dimensions in the plane of deformation from the nominal drawing size is determined and the size of the polymer coating layer to be applied to the support surface is established. Thereafter, the part is unloaded and the required amount of thermoplastic polymer material (capron) heated to the flowing state is applied, on top of which a perforated sheath of sheet steel with a sprayed wear layer is applied on the working side of the supporting surface. Produced by

repeated static loading of laziness in the most stressful (lower) reinforcing plastic deformations of up to 0.3% with simultaneous compressed dimensional coating in the space of the bearing surface of the part and the shell. After holding for 5 minutes to cure, the polymer of the rial is unloaded.

10 Conducted tests for tired nasal resistance of boreholes, according to the proposed method. Conducted endurance in constant mode.

. The load of the cycle is 400 kN, with a concentrated focus on the support over the top of the cabin, with imitation of the boundary during the transshipment of the car body. P tests are evaluated by the state of the shell and polymer coating.

20 cop destruction of bogie down on su. At the same time, the test has a quantity of 4 pcs. at the time of its ability, damage as a protective coating and polymer coating was not established. Not noted the detachment of the metal-polymer from the substrate, which is the surface of the part.

The wear resistance of metal-polymer coatings is determined by repeated loads with a drop weight on a cobalt of impact of 30 kJ with an area of 2.5 cm. Comparative support surfaces are provided with a pad, sprayed with wear-resistant and polymer

wasps by a known method without protecting locks. The coatings with the protective sheath are kept without 1400-1680 re-percussion coatings, while the coatings are applied in the old version, withstanding

40 re-shock loading. The P tests indicate a substantial increase in the working capacity of the parts according to the proposed versus the known.

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Claims (1)

Invention Formula A method of manufacturing parts No. 1278172, characterized in that improving the quality obtained in the process of pressing on a polymer coating is placed a sheath of molded steel sheet with a deposited dust on its side. wear resistant layer. Compiled by A. Bystroe Tehred I. VeresKorrektor L. Pilipenko Circulation 921 Subscription VNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, ul. Project, 4 Editor I. Shulla Order 3027/12 re-static loading before occurrence in the most stressful zone of the part (lower se) reinforcing residual plastic deformations within 0.1–0.3% with simultaneous pressing of the polymer coating in the space between the bearing surface of the part and the protective sheath. After holding for about 5 minutes to cure the polymeric material, the part is unloaded. 0 Conduct tests for fatigue and wear resistance of the hub beams manufactured by the proposed method. Fatigue tests are carried out for limited endurance in the mode of a constant average load of the 400 kN cycle applied concentrated to the supporting surface of the subframe, with imitation of an edge support during transshipment of the car body. The test results are evaluated according to the state of the protective sheath and the polymer coating to the moment of destruction of the bolster on the bottom of the bar. In this case, the tested beams in the amount of 4 pieces. by the time of loss of bearing capacity, there were no cases of damage to both the containment shell and the polymer coating. The peeling of the metal-polymer coating from the substrate, which is the bearing surface of the part, is also not noted. The durability of the metal-polymer coating is determined with repeated shock loads by a falling load on a copra with an impact energy of 30 kJ with a contact area of 2.5 cm. Comparative tests are carried out on the support surfaces of the dummy coated with a wear-resistant layer with by a known method without a protective shell. Coatings with a protective wear-resistant shell withstand 1400-1680 re-shock loads without damage, while coatings applied in the base case can withstand 770-980 0 re-shock loading. The test results indicate a significant increase in performance in the manufacture of parts for the proposed method in comparison with the known. five 0 Invention Formula The method of manufacturing parts according to ed. St. No. 1278172, characterized in that, in order to improve the quality of the parts produced, in the process of pressing on the polymer coating is placed a shell of perforated sheet steel coated by spraying from its working surface