This specification applies to the installation of mechanical presses, hydraulic presses, wire forming machines, forging hammers, shearing machines and bending correction machines and their ancillary devices (supporting equipment). GB 50272-1998 Construction and Acceptance Specification for Forging Equipment Installation Engineering GB50272-1998 Standard download decompression password: www.bzxz.net

Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
GB50272-98
Code for construction and acceptance of forging-pressequipment installation engineeringConstruction Standard
1998-08-27Release
State Bureau of Technical Supervision
Ministry of Construction of the People's Republic of China
Engineering Construction Standard Full-text Information System
1998-12-01
Jointly Issued
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National Standard of the People's Republic of China
Code for construction and acceptance of forging-pressequipment installation engineeringGB50272-98
Editor department: Former Ministry of Machinery Industry of the People's Republic of ChinaApproval department: Ministry of Construction of the People's Republic of ChinaEffective date: December 1, 1998
Engineering construction standard full text information system
Engineering construction standard full text information system
Notice on the release of ten national standards including "General Specifications for Construction and Acceptance of Mechanical Equipment Installation Engineering" Jianbiao [1998] No. 9
According to the requirements of the State Planning Commission's Document No. 2630 [1986] and Document No. 2390 [1987], the ten standards including "General Specifications for Construction and Acceptance of Mechanical Equipment Installation Engineering" jointly revised by the former Ministry of Machinery Industry and relevant departments have been reviewed by relevant departments. The following standards are now approved as mandatory national standards and will be implemented from December 1, 1998. The former national standards "Construction and Acceptance Specifications for Mechanical Equipment Installation Engineering" TJ231 and "Construction and Acceptance Specifications for Refrigeration Equipment Installation Engineering" GBJ66-84 are abolished at the same time. General Specification for Construction and Acceptance of Mechanical Equipment Installation Project GB50231-98 Construction and Acceptance Specification for Continuous Conveying Equipment Installation Project GB50270-98 Construction and Acceptance Specification for Metal Cutting Machine Tool Installation Project GB50271-98 Construction and Acceptance Specification for Forging Equipment Installation Project GB50272-98 Construction and Acceptance Specification for Industrial Boiler Installation Project GB50273-98 Construction and Acceptance Specification for Refrigeration Equipment and Air Separation Equipment Installation Project GB50274-98||t t||《Compressor, fan, pump installation project construction and acceptance specification》GB50275-98《Crushing, grinding equipment installation project construction and acceptance specification》GB50276-98《Casting equipment installation project construction and acceptance specification》GB50277-98《Lifting equipment installation project construction and acceptance specification》GB5027898The above specifications are managed by the State Machinery Industry Bureau, and the specific interpretation and other work are the responsibility of the Installation Engineering Standard Quota Station of the Ministry of Machinery Industry, and the publication and distribution are organized by the Standard Quota Research Institute of the Ministry of Construction.
Ministry of Construction of the People's Republic of China
August 27, 1998
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Revision Notes
This specification is edited by the former Ministry of Machinery Industry in accordance with the requirements of the State Planning Commission's Document No. 450 (1986), and is edited by the former Ministry of Machinery Industry. Specifically, it was organized by the Installation Engineering Standard and Quota Station of the Ministry of Machinery, and jointly revised by Chongqing Jianzhu University, the Ministry-affiliated Forging and Casting Machinery Research Institute, the Beijing Electromechanical Research Institute of the Heavy Machinery Research Institute, the Third Installation Engineering Company of China Machinery Industry, and key forging equipment manufacturers and users across the country. During the revision process, the revision group carefully summarized the experience since the implementation of the original specification on the construction and acceptance regulations of forging equipment installation projects, fully investigated and understood the standardization and scientific research results of my country's forging equipment manufacturing industry, absorbed new technologies, new materials and new processes in forging equipment installation projects, strictly followed the procedures, steps and requirements of the Ministry of Construction to revise standards and specifications, and finally reviewed and finalized by our department in conjunction with relevant departments. This specification is divided into eleven chapters and four appendices. The main contents of the revision are: 1. According to the development of my country's forging equipment manufacturing industry, the scope of application of various forging equipment installation specifications has been revised. Forging equipment with a wide range of uses, large usage and qualified conditions is included in this specification; representative models are added, and obsolete products are cancelled.
2. The original specification was revised in the 1970s. Due to the limitation of objective conditions at that time, the standardization of forging equipment manufacturing was still very imperfect. The installation specifications were mainly based on leveling the bed, and the geometric accuracy inspection methods and technical parameters were not unified and clear. Most of the current forging equipment manufacturing standards have formulated standards equivalent to international standards, so the inspection focus of the installation specifications is on the relevant geometric accuracy, so a lot of modifications have been made. 3. The heating preload formula of the column of the general three-beam four-column hydraulic press has increased the coefficient according to many years of practical experience, so that the problem of insufficient preload force that has existed for more than 20 years has been reasonably solved.
4. In order to save wood and not affect the performance, the pads under the hammer anvil can be changed to wooden pads that can be bonded, or vertical wood can be used instead of horizontal pads, or rubber pads can be used instead of wooden pads. 5. Nouns, terms, geometric tolerances and measurement units have been modified in large quantities according to the current national standards and regulations of the forging equipment manufacturing industry. During the implementation of this specification, if any modification or supplement is found, please send your opinions and relevant information to the "Forging Equipment Installation Engineering Construction and Acceptance Specifications" Management Group of the Industrial Installation Engineering Standard and Quota Station of the Ministry of Machinery Industry (address: No. 277 Wangfujing Street, Beijing, Postal Code: 100740) for reference in future revisions. Former Ministry of Machinery Industry
August 1998
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Chapter 1 General
Chapter 2
Chapter 3
General Provisions·
Hydraulic System…
Chapter 4
Mechanical Press
Section 1
General Requirements
Section 2
Open Press·
Section 3
Section 4
Section 5
Section 6
Chapter 5
Section 1
Section 2
Section 3
Section 4
Closed Press·
Screw Press Press·
Precision press·
Test run·
General requirements·
Forging hydraulic press
Die forging hydraulic press
Single-arm stamping hydraulic press
Vertical metal extrusion hydraulic press:
Section 5
Section 6 Light alloy single and double-acting extrusion hydraulic pressesSection 7 Electrode extrusion hydraulic presses
Section 8 Plastic products hydraulic presses and powder products hydraulic presses·Section 9 Double-acting thick plate stamping hydraulic presses
Section 10 Abrasive products hydraulic presses and four-column hydraulic pressesSection 11, Double-acting thin plate drawing hydraulic presses Engineering construction standard full text information system
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Section 12 Single-column Hydraulic Press
Section 13 Cold Drawing Hydraulic Press
Section 14
Chapter 6
Chapter 7
Section 1
Section 2
Section 3
Section 4
Section 5
Chapter 8
Section 1
Section 2
Section 3
Section 4
Section 5
Chapter 9
Section 1
Section 2
Section 3
Section 4
Chapter 10
Section 1|| tt||Test run·
Wire forming automatic machine·
General requirements·
Air hammer
Steam, air free forging hammer·
ZHK type die forging hammer
Test run·
Radial forging machine·
Roll forging machine·
Flat forging machine:
Hot die forging press
Test run·
Swing shearing machine
Shearing machine·
Bar shearing machine·
Test run
Bending correction machine
Rolling machine
Section 2
Folding machine
Section 3
Sheet bending machine||t t||Section 4 Pipe Bending Machine
Section 5 Roller Plate Straightening Machine
Section 6 Trial Operation
Engineering Construction Standard Full Text Information System
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Engineering Construction Standard Full Text Information System
Chapter 11 Project Acceptance
Appendix 1 Calculation Method of Sliding Bearing Clearance Appendix 2
Gluing method of forging hammer foundation pads·
Appendix 3
Loading method for checking the geometric accuracy of plate rolling machine..
Appendix 4 Explanation of terms used in this specification
Additional explanation
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Chapter 1 General
Article 1.0.1 This specification is formulated to improve the quality of installation engineering of forging equipment and its ancillary devices (supporting equipment) and promote the advancement of installation technology. Article 1.0.2 This specification applies to the installation of mechanical presses, hydraulic presses, wire forming automatic machines, forging hammers, forging machines, shearing machines and bending correction machines and their ancillary devices (supporting equipment).
The installation procedure of forging equipment should start from unpacking the equipment, through assembly, leveling, inspection of relevant geometric accuracy, until the no-load test run is qualified and the project is accepted. Article 1.0.3 This specification should be implemented in conjunction with the relevant provisions of the current national standard "General Specification for Construction and Acceptance of Mechanical Equipment Installation Projects". Article 1.0.4 In addition to implementing the provisions of this specification, the construction and acceptance of forging equipment installation projects should also comply with the provisions of the current relevant national standards and specifications. Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
Chapter 2 General Provisions
Article 2.0.1 The foundation, shims and anchor bolts of forging equipment shall meet the following requirements:
, the geometric dimensions and elevations of the foundation shall be accepted according to the foundation design drawings, and shall comply with the provisions of the current national standard "Construction and Acceptance Specifications for Reinforced Concrete Projects" and the installation and construction requirements of forging equipment.
2. For forging equipment with large impact and vibration, the base surface in contact with its base or shim should be flattened or polished, and mortar should not be used for leveling. 3. The specifications, quantity and placement of shims should comply with the provisions of the equipment technical documents. When there are no provisions in the equipment technical documents, the relevant provisions of the current national standard "General Specifications for Construction and Acceptance of Mechanical Equipment Installation Engineering" should be followed. 4. The shims of small and medium-sized forging equipment can be replaced by vibration damping seats. Article 2.0.2 Before any dimensional accuracy inspection is carried out on forging equipment, a level meter should be used to inspect it at the positions specified in each chapter of this specification. The longitudinal and lateral (left and right, front and back) installation levels should not be greater than 0.20/1000. Article 2.0.3 Before assembling forging equipment, it shall be cleaned and inspected according to the following requirements:
1. Clean the outer surface, assembly joint surface, sliding surface, various pipelines, oil tanks and pressure vessels of the equipment. The assembled components at the factory shall not be disassembled for cleaning; the cleaning method and the inspection of cleanliness shall be carried out in accordance with the relevant provisions of the current national standard "General Specifications for Construction and Acceptance of Mechanical Equipment Installation Engineering". 2. The appearance of the equipment shall be free of damage, rust and deformation; the basic dimensions and matching tolerances of the parts and components to be assembled shall be checked. 3. After cleaning and assembly, the pressure vessel, hydraulic system and lubrication system shall be tested for tightness in accordance with relevant regulations and shall not have leakage. Engineering Construction Standard Full Text Information SystemwwW.bzxz.Net
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Article 2.0.4 The assembly of forging equipment shall meet the following requirements: 1. The cleanliness of the equipment shall meet the provisions of the relevant standards. 2. The assembly process specifications shall meet the provisions of the equipment technical documents. 3. Important fixed joints should be tightly combined; after tightening, a 0.05mm feeler gauge should be used for inspection, and only partial insertion is allowed. The insertion depth should not be greater than 20% of the width, and the cumulative moving length of the inserted part should not be greater than 10% of the detectable length; the following parts of the forging equipment should be important fixed joints:
1. Column shoulder and workbench,
2. Column adjusting nut, locking nut and upper beam and workbench surface; 3. Hydraulic cylinder flange shoulder and upper beam or fuselage beam; 4. Piston (column) shoulder and slider;
5. Fuselage and guide rail or slider and inlay strip;
6. Beams and pillars of modular frame fuselage; 7. Workbench plate and workbench or beam. 4. The bearing and bearing seat should be in close contact, and their fit should meet the design requirements; the contact angle, length, contact spot, top clearance, side clearance and axial clearance between the bearing and the journal should all meet the requirements of the equipment technical documents. The factory-assembled ones do not need to undergo this inspection. When there is no provision in the equipment technical documents, it can be determined according to the calculation method in Appendix 1 of this specification.
5. The clearance value between the slider (movable crossbeam) and the guide rail (original clearance value at the time of leaving the factory) or the actual clearance value assembled on site should be measured and recorded for future reference. 6. After the meshing gear is installed, the allowable deviation of its axial misalignment should meet the requirements of Table 2.0.4-1.
Allowable deviation of axial misalignment of meshing gears (mm) Pinion rim width
Allowable deviation of center misalignment
50~150
Table 2.0.4-1
VII. After the flywheel is assembled on site, its circular runout allowable deviation shall not be greater than the provisions of Table 2.0.4-2 Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
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Allowable deviation of circular runout of flywheel (mm)
Flywheel diameter
≤1000
1000~2000
Allowable deviation of circular runout
Table 2.0.4-2
VIII. For important cam pairs assembled on site, the actual contact line length of the roller and cam force section shall not be less than 75% of the total length. 9. The tightness of the V-belt should be adjusted, and the amount of pressure and pressure of each V-belt should comply with the provisions of the relevant technical documents.
10. The pipelines, pipe joints, flanges and other fixed and movable sealing parts of the hydraulic, lubrication, cooling and air systems should be connected reliably and well sealed, and there should be no leakage of the medium and mixing with each other.
Article 2.0.5 The assembly of the expansion sleeve should meet the following requirements: 1. Check the basic dimensions and matching tolerances of the relevant connecting parts. 2. Clean the connecting parts, and evenly apply a thin layer of lubricating oil without molybdenum disulfide additives on the surface of the expansion sleeve and the surface of the connecting parts. 3. Push the connected parts onto the shaft to the position specified in the design, and smoothly install the expansion sleeve with the loosened screws into the connecting hole. At the same time, the connecting parts should be prevented from tilting, and the expansion sleeve screws should be tightened by hand.
4. Use a torque wrench to tighten the expansion screws diagonally, crosswise, and evenly; the tightening torque of the screws should be in accordance with the relevant provisions of the current national standard "Expansion Sleeve Connection Sleeve Type and Basic Dimensions" GB586786.
Section 2.0.6. When the assembly parts of forging equipment are connected by bolts and there is a preload requirement, the preload shall comply with the provisions of the equipment technical documents; when there is no provision in the equipment technical documents, the maximum preload should be 0.5 to 0.7 times the yield strength of the bolt material. Engineering 4 Construction Standard Full Text Information System
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