GB/T 35977-2018 PDF EnglishUS$135.00 · In stock · Download in 9 seconds
GB/T 35977-2018: Remanufacturing - Technical specifications for surface repair of mechanical products Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 35977-2018: Remanufacturing - Technical specifications for surface repair of mechanical products---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT35977-2018 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 25.220.01 J 04 Remanufacturing - Technical specifications for surface repair of mechanical products Issued on: FEBRUARY 06, 2018 Implemented on: SEPTEMBER 01, 2018 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People's Republic of China. Table of ContentsForeword ... 3 1 Scope ... 4 2 Normative references ... 4 3 Terms and definitions ... 4 4 Classification of surface repair technology ... 5 5 Design and selection principles ... 5 6 Requirements ... 6 7 Common surface repair technology for remanufacturing ... 7 8 Principle of blank surface repair technology for remanufacturing with different failure modes ... 7 Annex A (informative) Common surface repair technology for remanufacturing ... 8 Annex B (informative) Principles of blank surface repair technology for remanufacturing with different failure modes ... 11ForewordThis Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard was proposed by and shall be under the jurisdiction of National Technical Committee on Green Manufacturing Technology of Standardization Administration of China (SAC/TC 337). The drafting organizations of this Standard. Shandong Energy Heavy Equipment Manufacturing Group Co., Ltd., National Defense Science and Technology Key Laboratory of Equipment Remanufacturing Technology, Beijing Ruiman Technology Co., Ltd., China National Heavy Duty Truck Group Jinan Fuqiang Power Co., Ltd., China Machine Productivity Promotion Center, Heibei Beijing-Tianjin-Hebei Remanufacturing Industry Technology Research Co., Ltd., Hefei University of Technology, National Engineering Research Center for Remanufacturing of Mechanical Products, Hebei Ruizhao Laser Remanufacturing Technology Co., Ltd., Taier Heavy Industry Co., Ltd., Guangzhou Huadu Global Automatic Transmission Co., Ltd., The People's Liberation Army 5719 Factory. Main drafters of this Standard. Yang Qingdong, Zhang Wei, Yu Helong, Xu Binshi, Shi Peijing, Zhou Xinyuan, Li Enzhong, Luo Jianming, Zheng Handong, Wang Wenyu, Sang Fan, Sun Tingting, Liu Bohai, Chen Yongxiong, Han Hongshne, Li Kai, Hu Zhenfeng, Cheng Bayi, Huang Dongbao, Huang Zhiyong, Hou Tinghong, Zhao Yang. Remanufacturing - Technical specifications for surface repair of mechanical products1 ScopeThis Standard specifies classification, design and selection principles, requirements for surface repair technology for remanufacturing of mechanical product. This Standard is applicable to design and selection of materials, techniques and processes.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 28619, Remanufacturing - Terminology GB/T 31208, The methods of quality evaluation for remanufacturing core GB/T 32809, Remanufacturing - Technological specifications of cleaning for mechanical products3 Terms and definitionsFor the purposes of this document, the terms and definitions defined in GB/T 28619 as well as the followings apply. 3.1 surface repair technology for remanufacturing of mechanical products a series of surface engineering techniques (including additive manufacturing techniques) involved in the surface repair of remanufactured blanks to restore the remanufactured mechanical products to the geometrical parameters and performance of the prototype new product 3.2 surface damage repair repair of damage on the order of micrometers to millimeters consumption and environmental pollution when selecting surface repair techniques. In the process design and material selection, it is necessary to create conditions for the remanufacturing, recycling or extending service life of mechanical products.6 Requirements6.1 General requirements 6.1.1 Environmentally-friendly processes, equipment, materials and methods shall be preferred for surface repair technology for remanufacturing of mechanical products. 6.1.2 The remanufactured mechanical products after repair shall not be lower than the dimensional accuracy, technical parameters, quality characteristics and safety performance requirements of the prototype new products. 6.2 Requirements before repair 6.2.1 Remanufacturing surface repair design and demonstration shall be carried out according to the service conditions, failure modes and functional requirements of mechanical products. Make comprehensive consideration of technical, environmental and economic feasibility. Determine repair solutions and processes. And develop a guide on repair work. Determine the type, composition, structure and related physical and chemical properties and mechanical properties of the surface repair layer. 6.2.2 The remanufactured blanks shall be cleaned, tested and correspondingly pretreated and surface protected according to the surface finish conditions of the surface repair technology. Cleaning shall comply with the provisions of GB/T 32809, testing shall meet the requirements of GB/T 31208. 6.3 Repair process requirements 6.3.1 Prioritize automated surface engineering for remanufacturing surface repair. And strictly in accordance with the process flow, the processing and preparation of the remanufactured blank surface repair layer shall be performed. 6.3.2 According to the repair technical requirements, take necessary cooling, gas protection and other protective measures to prevent oxidation, cracking and shedding of the surface repair layer of the blank, and avoid deformation and damage of the blank. 6.3.3 The surface repair site shall be equipped with necessary noise reduction, dustproof, ventilation, anti-seepage and other facilities. The operator shall carry out the necessary labor protection. All kinds of waste generated during theAnnex A(informative) Common surface repair technology for remanufacturing Table A.1 gives common surface repair technology for remanufacturing. Table A.1 -- Common surface repair technology for remanufacturing No. Name Basic principle Technical features Applicable remanufactured blank Laser cladding technology With a high-energy-density laser beam as a heat source, use a filler such as synchronous powder feeding or powdering to add a cladding material to the damaged portion of the surface of the remanufactured blank. After laser irradiation, it is melted simultaneously with a thin layer on the surface of the substrate, and rapidly solidified to form a repair layer. The repair layer and the substrate are metallurgically bonded, the surface roughness is large, the dilution rate is low, and the heat impact on the substrate is small. Suitable for remanufacturing of important parts with complex structural shapes and high joint strength requirements. Can be used for surface damage repair as well as for volume damage repair. Plasma cladding technology Using a plasma arc as a heat source, a filler material is added by means of simultaneous powder feeding or powdering to add a cladding material to the damaged portion of the surface of the remanufactured blank. It is heated by plasma arc to melt it simultaneously with the thin layer on the surface of the substrate. And quickly form a repair layer. The repair layer and the substrate are metallurgically bonded, the surface roughness is large, the dilution rate is low, the heat of the substrate is less affected, and the deposition efficiency is higher. Suitable for remanufacturing of important parts with complex structural shapes and high joint strength requirements. Can be used for surface damage repair as well as for volume damage repair. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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