PDF GB/T 28615-2012 English
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Green manufacturing - The technology specification for metal-cutting machine tool remanufacturing
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GB/T 28615-2012: PDF in English (GBT 28615-2012) GB/T 28615-2012
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 25.080.01
J 50
Green manufacturing - The technology specification for
metal-cutting machine tool remanufacturing
ISSUED ON: JUNE 29, 2012
IMPLEMENTED ON: DECEMBER 01, 2012
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 General requirements ... 6
5 Requirements for mechanical parts ... 8
6 Requirements for electrical parts ... 11
7 Other requirements ... 12
Bibliography ... 14
Green manufacturing - The technology specification for
metal-cutting machine tool remanufacturing
1 Scope
This Standard specifies the general requirements, mechanical requirements, electrical
requirements and other requirements for the remanufacturing of metal cutting machine
tools.
This Standard applies to the remanufacturing of various metal cutting machine tools
(hereinafter referred to as machine tools).
2 Normative references
The 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 90.1, Fasteners - Acceptance inspection
GB/T 191, Packaging - Pictorial marking for handling of goods
GB 5226.1, Electrical safety of machinery - Electrical equipment of machines - Part
1: General requirements
GB/T 6576, Machine tool - Lubrication systems (ISO 5170)
GB/T 7932, Pneumatic fluid power - General rules and safety requirements for
systems and their components (ISO 4414)
GB/T 9061, General specifications for metal-cutting machine tools
GB/T 9969, General principles for preparation of instructions for use of industrial
products
GB 15760, Metal-cutting machine tools - General safeguarding specification
GB/T 18759, Electrical equipment of machines - Open numerical control system
GB/T 23571, Preparation of metal-cutting machine tools random technical
documents
GB/T 23572, Hydraulic system general specifications for metal-cutting machine
tools
GB/T 28612, Green manufacturing of mechanical products - Terminology
JB/T 3207, Machine tool accessory - General specification for products packaging
JB/T 8356.1, Machine tools - Specification for packing
JB/T 8356.2, Machine tools - Packing box
JB/T 8832, General requirements for numerical control systems of machine tools
JB/T 9874, Metal-cutting machine tools - General specifications for assembling
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T 28612 as
well as the followings apply.
3.1 machine tool remanufacturing
Machine tool manufacturing mode that is based on recycling of waste machine tool
resources. Use modern and advanced manufacturing, information, numerical control
and automation technologies to conduct remanufacturability evaluation, disassembly
and innovative redesign, reprocessing and reassembly of waste machine tools, to
manufacture new machine tools whose functions and performance have been restored
or improved and which meet the requirements of green manufacturing.
NOTE: Green manufacturing requirements refer to product resource consumption, ecological
environment, occupational health and safety requirements.
3.2 remanufactured machine tool
The machine tool that is based on waste machine tools and parts, the function and
performance of remanufacturing can reach or exceed the level of original new products.
3.3 machine tool disassembly
The process of decomposing the original waste machine tool assembly into individual
parts and components by decomposing the connecting parts and assembly relationship
by using certain tools and means.
3.4 redesign
The process that redesigns remanufactured products and their parts by means of
function enhancement and technical condition optimization, based on waste products
and recycled class.
4.5 Cleaning, testing
The disassembled parts and systems must be cleaned and tested to determine their
failure, wear and aging conditions. Analyze the feasibility of its reuse or
remanufacturing from the aspects of economy, technology, resources, environment.
4.6 Redesign of machine tools
According to the requirements of the overall scheme of machine tool remanufacturing,
design the structure and components of the remanufactured machine tool. The design
documents should be formed.
4.7 Formulation of remanufacturing process plan for mechanical parts
According to the test results of waste parts and the technical requirements for parts of
remanufactured machine tools, determine the remanufacturing process equipment,
process parameters of the parts, and formulate remanufacturing process regulations.
4.8 Formulation of remanufacturing technology plan for electrical control system
The electrical control system plan should be formulated according to the overall plan
of machine tool remanufacturing, including electrical schematic diagrams, electrical
location diagrams, and selection of electrical components. After the plan is formulated,
technical documents must be formed.
4.9 Assembly and commissioning
Remanufactured machine tools should be assembled according to the drawings and
reassembly process regulations. The parts (including remanufactured parts and
replacement parts) assembled on the remanufactured machine tool should meet the
quality requirements. The reassembly process and reassembly quality of
remanufactured machine tools should comply with the provisions of JB/T 9874.
4.10 Inspection and acceptance of remanufactured machine tools
The inspection and acceptance of remanufactured machine tools should be carried out
in accordance with the provisions of GB/T 9061. The main contents of inspection and
acceptance include:
a) Appearance inspection;
b) Inspection of accessories and tools;
c) Parameter inspection;
d) Idle operation test of machine tools;
e) Load test of machine tools;
f) Precision inspection of machine tools;
g) Processing and assembly quality inspection;
h) Others.
4.11 Accompanying technical documents
The accompanying technical documents for remanufactured machine tools should
include instruction manual that meets the requirements of GB/T 9969, certificate of
conformity, packing list, original machine tool and its remanufactured parts blank
performance and quality condition inspection report, remanufacturing statement card.
The compilation method of technical documents such as instruction manual, certificate
of conformity and packing list should comply with the provisions of GB/T 23571. The
remanufacturing statement card should indicate the manufacturer of the original
machine tool, the name, serial number and quantity of the remanufactured parts.
4.12 Packaging
The packaging of the machine tool should comply with the provisions of GB/T 191,
JB/T 8356.1, JB/T 8356.2, and JB/T 3207.
5 Requirements for mechanical parts
5.1 General requirements
5.1.1 The basic dimensions and tolerances of remanufactured mechanical parts should
be restored to the original design requirements or meet the interchangeability technical
requirements stipulated in national standards.
5.1.2 For remanufactured parts that do not meet the technical requirements for
interchangeability, their drawings and technical documents should establish
corresponding permanent files and provide them to the user as accompanying
information.
5.1.3 Wear-resistant measures should be taken for the main parts such as guide rail pairs,
spindles, lead screws, worm pairs and high-speed and heavy-duty gear pairs that are
important and easy to wear for remanufactured machine tools. Improve the working life
and meet the technical requirements.
5.2 Structural parts such as machine bed and box
If there are cracks, nicks and other defects on the surface of the bed, base, box and other
structural parts, they can be repaired by surface treatment or mechanical processing
5.17.2 Solenoid valves, retaining rings, O-rings, hoses and filters should be replaced.
5.17.3 Damaged or defective piping or fittings should be replaced.
5.17.4 The hydraulic system of the remanufactured machine tool should meet the
requirements of GB/T 23572.
5.18 Pneumatic system
5.18.1 The parts in the pneumatic system should be disassembled, flushed, cleaned and
inspected.
5.18.2 Broken or damaged parts should be replaced. Hoses and defective piping systems
should be replaced.
5.18.3 The air pressure relief valve should be replaced with a new pneumatic diaphragm
and reassembled.
5.18.4 The cylinder should be disassembled and inspected for wear and scratches. It
should be replaced if it is defective.
5.18.5 The pneumatic system of the remanufactured machine tool should comply with
the national standards, such as GB/T 7932.
5.19 Cooling system
5.19.1 The cooling pump should be disassembled, cleaned, rebuilt or replaced.
5.19.2 The reservoir and channels of the cooling system should be thoroughly cleaned.
5.19.3 Rigid cooling lines should be cleaned, flushed and replaced if damaged or
defective.
5.19.4 Hoses, shut-off valves, nozzles and filters should be replaced.
5.19.5 The cooling system of the remanufactured machine tool should ensure adequate
and reliable cooling.
5.20 Protective devices
Remanufactured machine tools should be equipped with protective devices according
to the provisions of GB 15760, such as shells, covers, screens, doors, closed protective
devices.
6 Requirements for electrical parts
6.1 Electrical system
Part of the electrical system should be removed and replaced with new components
(meeting the requirements of existing standards, except for electrical equipment
enclosures, wire ducts, rigid conduits). The remanufacturing of the electrical system
should comply with the relevant provisions of GB 5226.1.
6.2 CNC system
The numerical control system adopted by the remanufactured machine tools should
comply with the relevant provisions of GB/T 18759 and JB/T 8832.
6.3 Electrical wiring of machine tools
The machine tool should be completely rewired electrically. Replace all flexible
bushings and switch elements on the machine tool.
6.4 Testing and feedback devices
The original testing and feedback devices (including encoders, decoders, grating rulers)
should be replaced.
6.5 Motor
The motor should be tested. If there is a fault, it can be restored to its original standard
by disassembly, cleaning, and remanufacturing. All bearings in the motor should be
replaced. If the remanufactured motor cannot meet the technical requirements, it should
be replaced with a new motor with better performance.
6.6 Driver
It should be replaced with a new drive with equivalent or better performance.
7 Other requirements
7.1 Accessories and tools
All accessories, such as material conveying system, chip conveyor, oil mist separator,
suction cup, tailstock, turntable, should be provided according to user requirements and
agreements. Accessories and tools should be marked accordingly.
The standard accessories and tools of remanufactured machine tools should ensure the
interchangeability of functions and connecting parts.
7.2 Marks and nameplates
7.2.1 Remanufactured machine tools should have a clear remanufacturing mark. The
mark should comply with the marking requirements for remanufactured products.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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