This specification applies to the installation and acceptance of lathes, drilling machines, boring machines, grinding machines, gear processing machines, thread processing machines, milling machines, planing machines, broaching machines, special processing machines, sawing machines and modular machine tools. The machine tool installation project should start from the unpacking of the equipment, through assembly, alignment, leveling, inspection of relevant geometric accuracy, no-load test run and acceptance of the project. GB 50271-1998 Metal Cutting Machine Tool Installation Engineering Construction and Acceptance Specification GB50271-1998 Standard Download Decompression Password: www.bzxz.net

Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
GB50271—98
Code for construction and acceptance of metal-cutting machine installation engineering
1998-08-27
1998-12-01
State Bureau of Technical Supervision
Ministry of Construction of the People's Republic of China
Engineering Construction Standard Full-text Information System
Jointly Issued
W.bzsoso.coDEngineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Code for construction and acceptance of metal-cutting machine installation engineering engineeringGB50271-98
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 Specification 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 No. 2390 [1987], the ten standards including "General Specification 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 "Specification for Construction and Acceptance of Mechanical Equipment Installation Engineering" TJ231 and "Specification for Construction and Acceptance of 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 engineering construction and acceptance specification》GB50275-98《Crushing, grinding equipment installation engineering construction and acceptance specification》GB50276-98《Casting equipment installation engineering construction and acceptance specification》GB50277-98《Lifting equipment installation engineering construction and acceptance specification》GB50278-98The 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. The specific work of the revision was organized by the Installation Engineering Standard and Quota Station of the Ministry of Machinery Industry, in conjunction with Chongqing Jianzhu University, national key machinery and equipment installation companies, machine tool users, various machine tool manufacturing institutes under the ministry, major machine tool manufacturers and the Second Installation Engineering Company of China Machinery Industry. During the revision process, the revision group carefully summarized the experience since the implementation of the original "Metal Cutting Machine Tool Installation Engineering Construction and Acceptance Specifications"; fully investigated and understood the standardization and scientific research results of my country's machine tool manufacturing industry; absorbed new technologies, new materials and new processes in machine tool installation projects. Strictly follow the procedures, steps and requirements of the Ministry of Construction to revise standards and specifications, and finally our department will review and finalize them together with relevant departments. This specification is divided into 15 chapters and two appendices. The main contents of the revision are: 1. According to the situation of my country's machine tool manufacturing, the scope of application of machine tool installation engineering construction and acceptance has been revised. Due to the large number of machine tools, their specifications, varieties and technical performance have changed greatly, and this specification cannot include all of them. Therefore, generally only the machine tools with a large number of uses, large usage, product technical conditions and precision standards, and representative installation projects are included in this specification. 2. The original specification was revised in the 1970s. Due to the limitations of the conditions at that time, there were many problems with the installation specifications. In recent years, most machine tool manufacturing accuracy standards have been close to international standards, and machine tool manufacturing standards equivalent to international standards have been formulated. Therefore, the inspection items, technical requirements, and inspection methods of various types of machine tools in this specification have been greatly revised. 3. The original specification states that the horizontality of the bed, the straightness of the bed in the vertical plane, the straightness of the bed guide in the horizontal plane, and the parallelism of the bed guide in the vertical plane are all major inspection items. The revised specification changes the horizontality of the machine tool to "installation level", and the straightness and parallelism of the bed guide are used as the prerequisites for the inspection of the geometric accuracy of the machine tool. Engineering Construction Standard Full Text Information System
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Parts and transitional pre-adjustment accuracy, and are not important items for the acceptance of installation projects; while during the acceptance of machine tool installation projects, as long as the relevant geometric accuracy inspection is qualified, it is qualified. As for the "installation level" and pre-adjustment accuracy, whether it has changed or is within the allowable range, it is not necessary to re-inspect or adjust it. 4. Nouns, terms, shape and position tolerances, and measurement units have been greatly modified in accordance with the current national standards and the general rules for metal cutting machine tool inspection. During the implementation of this specification, if any modification or supplement is found, please send your opinions and relevant materials to the Management Group of "Construction and Acceptance Specifications for Installation Engineering of Metal Cutting Machine Tools" of the Installation Engineering Standard and Quota Station of the Ministry of Machinery Industry (Address: No. 227 Wangfujing Street, Beijing, Postal Code: 100740) for reference in future revisions. Former Ministry of Machinery Industry
August 1998
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Engineering Construction Standard Full Text Information System
Chapter 1
Chapter 2
Chapter 3
Section 1
Section 2
Section 3
Section 4||t t||Section 5
Chapter 4
Section 1
Section 2
Chapter 5
Section 1
Section 2
Section 3
Section 4
Section 5
Chapter 6
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7
Chapter 7
General Provisions
Lathe Installation
Single-spindle Slitting Automatic Lathe, Horizontal Multi-spindle Automatic Lathe Turret Lathe
Single-column, Double-column Vertical Lathe Room
Ordinary horizontal lathe, precision horizontal lathe
Heavy-duty horizontal lathe
Drilling machine installation
Radial drilling machine
Vertical drilling machine
Boring machine installation
Jig boring machine
Horizontal milling and boring machine...
Floor-type boring machine and floor-type milling and boring machine
Planing table horizontal milling and boring machine
Fine boring machine
Grinding machine installation
Centerless cylindrical grinder·
External cylindrical grinder
Internal cylindrical grinder
Guide rail grinder...
Tool sharpening machine
Surface and end grinder
Vertical honing machine
Gear Gear processing machine installation
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Engineering construction standard full text information system
Section 1 Bevel gear processing machine
Section 2
Gear hobbing machine
Section 3
Section 4
Section 5
Section 6
Chapter 8
Section 1
Section 2
Section 3
Chapter 9
Section 1
Section 2
Section 3
Chapter 10
Section 1
Section 2
Section 3
Gear shaving machine and gear machine·
Gear shaping machine.
Spline shaft milling machine·
Gear grinding machine
Thread processing machine installation
Tap grinder
Thread grinder
Screw lathe…
Milling machine installation
Gantry milling machine
Surface milling machine, lifting table milling machine Bed, rocker milling machine, universal tool milling machine·
Worktable non-lifting milling machine
Planing and slotting machine installation
Single-arm cutting machine, gantry planer
Shaper
Chapter 11
Section 1
Section 2
Section 3
Broaching machine installation·
Vertical internal broaching machine
Horizontal internal broaching machine
Vertical external broaching machine
Chapter 12
Chapter 13
Chapter 14
Section 1
Special processing machine tool installation
Sawing machine installation
Combination machine tool installation
-General Provisions
Drilling and boring machine tools
Section 2
Section 3
Milling machine tools
Section 4 Tapping machine tools
Section 5 Automatic lines for combined machine tools
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Chapter 15 Engineering Acceptance
Appendix 1 Requirements for Pre-adjustment Accuracy Inspection
Appendix 2 Explanation of Terms Used in This Standard
Additional Explanation
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Chapter 1 General
Article 1.0.1 This specification is formulated to improve the quality of metal cutting machine tool (hereinafter referred to as machine tool) installation engineering and promote the advancement of installation technology. Article 1.0.2 This specification applies to the installation and acceptance of lathes, drilling machines, boring machines, grinding machines, gear processing machines, thread processing machines, milling machines, planing and slotting machines, broaching machines, special processing machines, sawing machines and combination machine tools. The installation project of machine tools should be completed from the unpacking of the equipment, through assembly, alignment, leveling, inspection of relevant geometric accuracy, no-load test run until the project is accepted.
Article 1.0.3 This specification stipulates that the inspection items of various machine tools are to inspect the geometric accuracy related to the installation of machine tools. When the relevant geometric accuracy does not meet the requirements of this specification, the pre-adjustment accuracy of the relevant components can be adjusted, but the pre-adjustment accuracy of the components does not need to be re-inspected during the delivery and acceptance. The pre-adjustment accuracy inspection should comply with the requirements of Appendix 1 of this specification. Article 1.0.4 In addition to complying with the provisions of this specification, the construction and acceptance of metal cutting machine tool installation projects shall also comply with the provisions of the current relevant national standards and specifications. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
General Provisions
Second Draft
Article 2.0.1 The shims and shim groups of machine tools shall meet the following requirements: 1. The type, specification and layout of shims shall comply with the provisions of the equipment technical documents. When there are no provisions, they shall meet the following requirements: 1. There shall be at least one group of shims near each anchor bolt; 2. The shim group should be close to the anchor bolt and the bottom of the main force-bearing part of the base under the condition that it can be placed steadily and does not affect the grouting.
3. The distance between two adjacent shim groups should not be greater than 800mm; 4. A group of shims should be placed on both sides of the joint of the machine tool base; 5. The number of blocks in each shim group should not exceed three. 2. Each hot iron group should be placed neatly, stably and in good contact. 3. After the machine tool is leveled, the length of the shim group extending into the bottom surface of the machine tool base should exceed the center of the anchor bolt, and the end face of the shim should be exposed to the outer edge of the bottom surface of the machine tool. The flat shim should be exposed by 10 to 30 mm, and the inclined shim should be exposed by 10 to 50 mm. The bolt adjustment shim should leave a margin for further adjustment.
Article 2.0.2 When leveling the machine tool, the machine tool should be in a free state. It should not be forced to deform the machine tool to meet the accuracy requirements by tightening the anchor bolts and applying local pressure. For machine tools with a bed length greater than 8m, if it is difficult to meet the "natural leveling" requirements, "natural leveling" can be performed first to adjust the deviation of the guide rail to within twice the allowable deviation, and then the machine tool can be forced to meet the accuracy requirements by tightening the anchor bolts and other methods.
Article 2.0.3 When inspecting the machine tool, the accuracy of the inspection tool used should be higher than the accuracy requirements of the inspected object, and the inspection tool deviation should be less than 25% of the tolerance of the inspected item. Article 2.0.4 The components and subassemblies of the assembled machine tools shall meet the following requirements: 1. The assembly procedures, methods and technical requirements shall comply with the specifications of the equipment technical documents. Engineering Construction Standards Full Text Information System
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stipulates that parts and components that have been assembled at the factory should not be disassembled; second, the assembly environment should be clean, and the assembly environment of parts and components with high precision requirements should comply with the provisions of the equipment technical documents; third, parts and components should be cleaned, and their processed surfaces should not be bumped, scratched or rusted;
Fourth, after the moving and rotating parts of the machine tool are assembled, their movement should be smooth, flexible, light, and without obstruction, and the displacement mechanism should be accurately and reliably moved to the specified position; fifth, the lifting distance of the balance hammer should meet the requirements of the maximum travel of the relevant parts of the machine tool, and the balance hammer should be firmly connected to the wire rope or chain; sixth, the important and particularly important fixed joint surfaces of the assembly should meet the following requirements: 1. Important fixed joint surfaces should be checked with a feeler gauge after tightening, and no insertion is allowed. Especially important fixed joint surfaces should be checked with a feeler gauge before and after tightening, and no insertion is allowed; especially important fixed joint surfaces whose joint surfaces are perpendicular to the horizontal plane should be checked after tightening. The thickness of the feeler gauge used should comply with the provisions of Table 2.0.4-1. Feeler gauge thickness used to check important and particularly important fixed joint surfaces (mm)
Machine tool accuracy grade
Table 2.0.4-1
Feeler gauge thickness
Note: The classification of important and particularly important fixed joint surfaces should comply with the provisions of the industry standard "Metal Cutting Machine Tool Accuracy Classification" JB/Z276-86.
2. When using the feeler gauge specified in Table 2.0.4-1 for inspection, one or two insertions are allowed, and the insertion depth should be less than 1/5 of the joint surface width, but not more than 5mm, and the length of the insertion part should be less than or equal to 1/5 of the joint surface length, but each part should not be more than 100mm.
VII. Sliding and displacement guides should be checked with a 0.04mm feeler gauge. The allowable insertion depth of the feeler gauge between the sliding surfaces of the guide rail, W strip and pressure plate end should comply with the provisions of Table 2.0.4-2:
Check the allowable insertion depth of the feeler gauge at the joint surface of the guide rail, strip and pressure plate (mm)
Machine tool weight
Permitted insertion depth
Machine tools with grade IV and V accuracy
Note: Displacement guides are inspected according to the working state. Table 2.0.4-2
Machine tools with precision grades above heavy and ear grade
VIII. The rolling guide surface should be in contact with all rolling elements, and its movement should be light, flexible and without obstruction;
IX. After the bed guide rails of multiple sections are joined, the misalignment at the joints of adjacent guide surfaces should comply with the provisions of Table 2.0.4-3; Misalignment at the joints of adjacent guide surfaces (mm) Machine tool weight (t)
X. There should be a margin for adjustment after the inlay strips are assembled; Misalignment
Table 2.0.4-3
XI. The locating pin and the pin hole should be in good contact. The contact length of the important locating cone pin shall not be less than 60% of the working length and shall be evenly distributed on both sides of the joint: the depth of the pin inserted into the hole shall comply with the provisions of the pin and can be taken out smoothly. When the connector needs to be readjusted after the pin is installed, the pin should be taken out before adjustment. Article 2.0.5 When a machine tool with a constant temperature requirement is to be inspected for accuracy, it must be inspected under the specified constant temperature conditions; the inspection tool used should be placed at the inspection machine location first, and can only be used after the inspection tool and the machine location have reached the same temperature.
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