JB/T 50048-1999 Rotor Sand Mixer Product Quality Classification JB/T50048-1999 Standard Download Decompression Password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T50048-1999
Product Quality Classification of Rotor Sand Mixer
(Internal Use)
Published on 1999-06-09
National Bureau of Machinery Industry
Implemented on 2000-01-01
JB/T50048-1999
This standard is a revision of JB/T50048-94 "Product Quality Classification of Rotor Sand Mixer". During the revision, it was only re-edited according to relevant regulations, and the technical content has not changed
This standard replaces JB/T50048-94 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Foundry Machinery Standardization. The main drafting unit of this standard: Qingdao Tiantai Machinery Co., Ltd. The main drafters of this standard: Sun Fasheng and Sun Xuezhong. This standard was first issued in 1994.
1 Scope
Machinery Industry Standard of the People's Republic of China
Product Quality Grading of Rotor Sand Mixer
(Internal Use)
JB/T 50048-1999
Replaces JB/T50048-94
This standard specifies the product quality grade, product quality grading requirements, test methods and evaluation methods of rotor sand mixers. This standard is applicable to the evaluation of the product quality grade level of mass-produced rotor sand mixers (hereinafter referred to as sand mixers). 2 Cited Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of this standard, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB 191—1990
GB/T5226.1—1996
JB/T16441991
JB/T30001991
JB/T53641991
JB5545—1991
JB/T7457—1994
JB/T8356.1—1996
JB/T54825—1999
3 Quality Grade
Packaging Storage and Transportation Pictorial Mark|| tt||Industrial machinery and electrical equipment Part 1: General technical conditions General technical conditions for foundry machinery
Model compilation method for foundry equipment
Technical conditions for painting of sand treatment and cleaning equipment Technical conditions for safety protection of foundry machinery
Technical conditions for rotor sand mixer
Technical conditions for machine tool packaging
General classification of foundry machinery product quality
This standard classifies the quality of the sand mixer according to the quality level and use value of the finished product inspection, production process quality inspection and use process quality inspection of the sand mixer.
This standard classifies the sand mixer into qualified products, first-class products and superior products according to the quality level achieved. 4 Quality classification requirements
4.1 Performance and structure
4.1.1 Qualified products
The sand mixing performance shall comply with the provisions of 3.17 of JB/T74571994. 4.1.1.1
4.1.1.2 The structure of the sand mixer shall comply with the provisions of 3.2 of JB/T1644-1991. 4.1.2
First-class products
4.1.2.1 The structure of the sand mixer shall be improved to a certain extent on the basis of adopting international standards and advanced foreign standards, and reach the general level of similar international products or the advanced domestic level. 4.1.2.2 The rest are the same as qualified products.
Approved by the State Machinery Industry Bureau on June 9, 1999 and implemented on January 1, 2000
4.1.3 Superior products
JB/T50048-1999www.bzxz.net
4.1.3.1 The structure of the sand mixer shall reach the advanced level in the past five years compared with similar international products. 4.1.3.2 The rest are the same as first-class products.
4.2 Operational performance
4.2.1 Qualified products
4.2.1.1 All fastening and connecting parts should not be loose. 4.2.1.2 All operating mechanisms, adjustment mechanisms and control mechanisms should be flexible and reliable. 4.2.1.3 The productivity of the sand mixer should comply with the provisions of the technical documents. 4.2.1.4 The sand mixing capacity should comply with the provisions of 3.18 of JB/T74571994. 4.2.1.5
5 The sand mixer should be able to start under load.
2 First-class products
Same as qualified products.
4.2.3 Superior products
Same as first-class products.
4.3 Precision
4.3.1 Qualified products
4.3.1.1 The verticality between the main shaft axis and the upper plane of the chassis should not be greater than 0.7/1000.4.3.1.2 Flatness of the upper plane of the bottom lining plate: metal lining plate should not be greater than 1.5/1000; cast stone lining plate should not be greater than 6.0/10003 The gap at the joint of the bottom lining plate: metal lining plate should not be greater than 1.5mm; cast stone lining plate should not be greater than 10.0mm. 4.3.1.3
4.3.1.4 The value below the plane of the door frame plate after the sand outlet door is closed should not be greater than 1.5mm. The peripheral gap after the sand outlet door and sampling door are closed should not be greater than 1.5mm. 4.3.1.5
The radial runout of the lower end of the rotor frame should not be greater than 1.0mm. 4.3.1.6
4.3.1.7 The gap between the crosshead and the upper plane of the outer ring of the sealing cover should not be greater than 0.8mm. 4.3.2
First-class products
The verticality of the main shaft axis and the upper plane of the chassis should not be greater than 0.6/1000.4.3.2.2
The flatness of the upper plane of the bottom lining plate: the metal lining plate should not be greater than 1.2/1000; the cast stone lining plate should not be greater than 4.8/1000. The gap at the joint of the bottom lining plate: the metal lining plate should not be greater than 1.2mm; the cast stone lining plate should not be greater than 8.0mm. 4.3.2.3
The value below the plane of the door frame plate after the sand outlet door is closed should not be greater than 1.2mm. 4.3.2.4
The peripheral gap after the sand outlet door and sampling door are closed should not be greater than 1.2mm. 4.3.2.5
The radial runout of the lower end of the rotor frame shall not be greater than 0.8mm. 4.3.2.6
The gap between the crosshead and the upper plane of the outer ring of the sealing cover shall not be greater than 0.6mm. 4.3.2.7
4.3.3 Superior products
1 The verticality between the main shaft axis and the upper plane of the chassis shall not be greater than 0.5/10004.3.3.1
The flatness of the plane on the bottom lining plate: the metal lining plate shall not be greater than 1.0/1000; the cast stone lining plate shall not be greater than 4.0/1000The gap at the joint of the bottom lining plate: the metal lining plate shall not be greater than 1.0mm; the cast stone lining plate shall not be greater than 7.0mm. 4.3.3.3
The value below the plane on the door frame plate after the sand outlet door is closed shall not be greater than 1.0mm. 4.3.3.4
After the sand outlet door and sampling door are closed, the peripheral clearance should not be greater than 1.0mm. 4.3.3.5
JB/T50048-1999
4.3.3.6The radial runout of the lower end of the rotor frame should not be greater than 0.7mm4.3.3.7The clearance between the crosshead and the upper plane of the outer ring of the sealing cover should not be greater than 0.5mm. 4.4 General requirements
4.4.1 Qualified products
4.4.1.1The model, name and parameters of the sand mixer should comply with the provisions of JB/T3000. 4.4.1.2 Drawings and technical documents should fully implement the current standards, and the content should be complete and unified, the issuance procedures should be complete, and there should be no technical errors.
4.4.1.3Electrical components shall use qualified products that have obtained production licenses and comply with the provisions of GB/T5226.1. The pneumatic system shall comply with the provisions of 3.7.2 of JB/T1644-1991. 4.4.1.4
The lubrication system shall comply with the provisions of 3.7.3 of JB/T1644-1991. 4.4.1.6
The pneumatic and lubrication systems and various pipelines shall be installed neatly, well sealed, and shall not leak. The temperature rise of rolling bearings shall not be higher than 35℃, and the maximum temperature shall not be higher than 70℃. 4.4.1.7
First-class products
The temperature rise of rolling bearings shall not be higher than 28℃, and the maximum temperature shall not be higher than 55℃. 4.4.2.2The rest are the same as qualified products.
4.4.3 Superior products
4.4.3.1 The temperature rise of rolling bearings shall not exceed 24℃, and the maximum temperature shall not exceed 50℃. 4.4.3.2 Other products of the same quality.
4.5 Reliability
4.5.1 Qualified products
4.5.1.1 No abnormality shall occur in any part during the prescribed test. 4.5.1.2 Under normal use conditions, the first overhaul period of the whole machine shall not be less than 12000h. 4.5.1.3 The life of each scraper and rotor blade and other wearing parts should not be less than 500h. 4.5.2
First-class products
Under normal use conditions, the first overhaul period of the whole machine should not be less than 15000h. 4.5.2.1
4.5.2.2 The life of each scraper and rotor blade and other wearing parts should not be less than 600h4.5.2.3 A certain number of reliability tracking investigation files should be established for sand mixers within 3 years of leaving the factory to carry out reliability work. 4.5.2.4 The rest are the same as qualified products.
4.5.3 Superior products
4.5.3.1 Under normal use conditions, the first overhaul period of the whole machine should not be less than 16000h4.5.3.2 The life of each scraper and rotor blade and other wearing parts should not be less than 650h. 4.5.3.3 The sand mixer shall be subject to reliability assessment, and the assessment index shall reach the advanced level in the past five years compared with similar foreign products. 4.5.3.4 The rest are the same as the first-class products.
4.6 Safety and hygiene
4.6.1 Qualified products
4.6.1.1 The inspection door and exposed movement mechanism shall be equipped with safety protection devices and comply with the provisions of JB5545. 4.6.1.2 The idling noise shall comply with the provisions of 3.14 of JB/T7457-1994. 3
4.6.2 First-class products
JB/T50048-1999
4.6.2.1 The idling noise shall be 2dB(A) lower than that of qualified products. 4.6.2.2 The rest are the same as qualified products.
4.6.3 Superior products
4.6.3.1 Noise during idling is 3dB(A) lower than that of first-class products. 4.6.3.2 Other products of the same grade.
The complete set (matching) shall comply with the provisions of 4.7 of JB/T54825-1999. 4.8
The shape and appearance shall comply with the provisions of 4.8 of JB/T54825-1999. Packaging
4.9.1 Qualified products
The packaging of the sand mixer shall comply with the provisions of 7.2 of JB/T1644-1991. 4.9.1.2
The graphic signs for packaging, storage and transportation shall comply with the provisions of GB191. 4.9.1.3 The accompanying technical documents shall be complete and have waterproof and moisture-proof packaging. 4.9.1.4
The packaging of the export sand mixer shall comply with the provisions of JB/T8356.1. First-class products
Same as qualified products.
4.9.3 Superior products
Same as first-class products.
4.10 The material and heat treatment shall comply with the provisions of 4.10 in JB/T54825-1999. 4.11 Parts processing quality
4.11.1 Qualified products
4.11.1.1 Parts processing shall comply with the provisions of the drawings and process documents. 4.11.1.2 The processed surface shall not have defects such as bumps, knocks, scratches and rust. 4.11.1.3 The qualification rate of major items of major parts shall not be less than 85%. The main parts are: reduction box body, transmission gears of various levels, gear shaft, main shaft; the main items should be determined according to the provisions of 4.11.1.7 of JB/T548251999.
4.11.1.4 The qualification rate of key items of main parts is 100%. The key item is the parallelism of the center line of the reduction box hole. First-class products
4.11.2.1 The qualification rate of main items of main parts should not be less than 90%. 4.11.2.2 The rest are the same as qualified products.
4.11.3 Superior products
4.11.3.1 The qualification rate of main items of main parts should not be less than 95%. 4.11.3.2 The rest are the same as first-class products.
4.12 Assembly accuracy
4.12.1 Qualified products
4.12.1.1 The internal cleanliness of the gearbox should not be greater than 0.02% of the lower limit of the lubricating oil standard. 4.12.1. 2
The cumulative contact area of ​​the gearbox joint surface should not be less than 70%. 4.12.1.3
4.12.1. 4
4.12.1. 5
JB/T50048-1999
The flash and burrs of the parts should be cleaned up and all fasteners and connectors should be firm and reliable.
During the assembly process, the processed parts should not have obvious rust, knocks, collisions, scratches and other defects. First-class products
4.12.2. 2
The internal cleanliness of the gearbox should not be greater than 0.016% of the lower limit of the lubricating oil mark. The cumulative contact area of ​​the gearbox joint surface should not be less than 80%. The rest are the same as qualified products.
Superior products
The internal cleanliness of the gearbox should not be greater than 0.015% of the lower limit of the lubricating oil mark. The cumulative contact area of ​​the gearbox joint surface should not be less than 90%. The rest are the same as qualified products.
4.13 Painting and rust prevention
4.13.1 Qualified products
4.13. 1. 1
The painting of the sand mixer should comply with the provisions of JB/T5364. 4.13. 1. 2
All non-machined surfaces of the ferrous metal of the sand mixer should be painted, and there should be no mis-painting or missing painting. The machined surfaces should not be painted except as specified in the drawings and technical documents. 4.13.1.3
The machined surface of all parts shall be free from rust. First-class products
Same as qualified products.
4.13.3 Superior products
Same as first-class products.
4.14 User evaluation and user service shall comply with the provisions of 4.14 of JB/54825-1999. 5 Test methods
The test methods shall comply with the provisions of Chapter 4 of JB/T7457-1994 Sampling and evaluation methods
The sampling and evaluation methods shall comply with the provisions of Chapter 6 of JB/T54825-1999. 5
People's Republic of China
Mechanical Industry Standard
Rotor Sand Mixer Product Quality Classification
(Internal Use)
JB/T500481999
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing
Postal Code 100044)
Format 880X12301/16 Printing Sheet 1/2 Number of Words 12000First Edition in September 1999
First Printing in September 1999
Number of Prints 1-500
Price 10.00 Yuan
99-702
66680010 The material and heat treatment shall comply with the provisions of 4.10 in JB/T54825-1999. 4.11 Quality of parts processing
4.11.1 Qualified products
4.11.1.1 The processing of parts shall comply with the provisions of the drawings and process documents. 4.11.1.2 The processed surface shall not have defects such as bumps, knocks, scratches and rust. 4.11.1.3 The qualification rate of the main items of the main parts shall not be less than 85%. The main parts are: reduction box body, various levels of transmission gears, gear shafts, and main shafts; the main items shall be determined in accordance with the provisions of 4.11.1.7 in JB/T54825-1999.
4.11.1.4 The qualification rate of the key items of the main parts is 100%. The key item is the parallelism of the center line of the reduction box hole. First-class products
4.11.2.1 The qualification rate of the main items of the main parts shall not be less than 90%. 4.11.2.2 The rest are the same as qualified products.
4.11.3 Superior products
4.11.3.1 The qualified rate of the main items of the main parts shall not be less than 95%. 4.11.3.2 The rest are the same as first-class products.
4.12 Assembly accuracy
4.12.1 Qualified products
4.12.1.1 The internal cleanliness of the gearbox shall not be greater than 0.02% of the lower limit of the lubricating oil mark weight4.12.1. 2
The cumulative contact area of ​​the gearbox joint surface shall not be less than 70%4.12.1.3
4.12.1. 4
4.12.1. 5
JB/T50048-1999
The flash and burrs of the parts shall be cleaned and all fasteners and connectors shall be firm and reliable.
During the assembly process, the processed parts should not have obvious rust, knocks, scratches and other defects. First-class products
4.12.2. 2
The internal cleanliness of the gearbox should not be greater than 0.016% of the lower limit of the lubricating oil mark. The cumulative contact area of ​​the gearbox joint surface should not be less than 80%. The rest are the same as qualified products.
Superior products
The internal cleanliness of the gearbox should not be greater than 0.015% of the lower limit of the lubricating oil mark. The cumulative contact area of ​​the gearbox joint surface should not be less than 90%. The rest are the same as qualified products.
4.13 Painting and rust prevention
4.13.1Qualified products
4.13. 1. 1
The painting of the sand mixer should comply with the provisions of JB/T5364. 4.13.1.2
All non-machined surfaces of ferrous metal of sand mixer shall be painted, and there shall be no mis-painting or missing of paint. Machined surfaces shall not be painted except as specified in drawings and technical documents. 4.13.1.3
All machined surfaces of parts shall be free of rust. First-class products
Same as qualified products.
4.13.3 Superior products
Same as first-class products.
4.14 User evaluation and user service shall comply with the provisions of 4.14 of JB/54825-1999. 5 Test methods
The test methods shall comply with the provisions of Chapter 4 of JB/T7457-1994 Sampling and evaluation methods
The sampling and evaluation methods shall comply with the provisions of Chapter 6 of JB/T54825-1999. 5
People's Republic of China
Mechanical Industry Standard
Rotor Sand Mixer Product Quality Classification
(Internal Use)
JB/T500481999
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing
Postal Code 100044)
Format 880X12301/16 Printing Sheet 1/2 Number of Words 12000First Edition in September 1999
First Printing in September 1999
Number of Prints 1-500
Price 10.00 Yuan
99-702
66680010 The material and heat treatment shall comply with the provisions of 4.10 in JB/T54825-1999. 4.11 Quality of parts processing
4.11.1 Qualified products
4.11.1.1 The processing of parts shall comply with the provisions of the drawings and process documents. 4.11.1.2 The processed surface shall not have defects such as bumps, knocks, scratches and rust. 4.11.1.3 The qualification rate of the main items of the main parts shall not be less than 85%. The main parts are: reduction box body, various levels of transmission gears, gear shafts, and main shafts; the main items shall be determined in accordance with the provisions of 4.11.1.7 in JB/T54825-1999.
4.11.1.4 The qualification rate of the key items of the main parts is 100%. The key item is the parallelism of the center line of the reduction box hole. First-class products
4.11.2.1 The qualification rate of the main items of the main parts shall not be less than 90%. 4.11.2.2 The rest are the same as qualified products.
4.11.3 Superior products
4.11.3.1 The qualified rate of the main items of the main parts shall not be less than 95%. 4.11.3.2 The rest are the same as first-class products.
4.12 Assembly accuracy
4.12.1 Qualified products
4.12.1.1 The internal cleanliness of the gearbox shall not be greater than 0.02% of the lower limit of the lubricating oil mark weight4.12.1. 2
The cumulative contact area of ​​the gearbox joint surface shall not be less than 70%4.12.1.3
4.12.1. 4
4.12.1. 5
JB/T50048-1999
The flash and burrs of the parts shall be cleaned and all fasteners and connectors shall be firm and reliable.
During the assembly process, the processed parts should not have obvious rust, knocks, scratches and other defects. First-class products
4.12.2. 2
The internal cleanliness of the gearbox should not be greater than 0.016% of the lower limit of the lubricating oil mark. The cumulative contact area of ​​the gearbox joint surface should not be less than 80%. The rest are the same as qualified products.
Superior products
The internal cleanliness of the gearbox should not be greater than 0.015% of the lower limit of the lubricating oil mark. The cumulative contact area of ​​the gearbox joint surface should not be less than 90%. The rest are the same as qualified products.
4.13 Painting and rust prevention
4.13.1Qualified products
4.13. 1. 1
The painting of the sand mixer should comply with the provisions of JB/T5364. 4.13.1.2
All non-machined surfaces of ferrous metal of sand mixer shall be painted, and there shall be no mis-painting or missing of paint. Machined surfaces shall not be painted except as specified in drawings and technical documents. 4.13.1.3
All machined surfaces of parts shall be free of rust. First-class products
Same as qualified products.
4.13.3 Superior products
Same as first-class products.
4.14 User evaluation and user service shall comply with the provisions of 4.14 of JB/54825-1999. 5 Test methods
The test methods shall comply with the provisions of Chapter 4 of JB/T7457-1994 Sampling and evaluation methods
The sampling and evaluation methods shall comply with the provisions of Chapter 6 of JB/T54825-1999. 5
People's Republic of China
Mechanical Industry Standard
Rotor Sand Mixer Product Quality Classification
(Internal Use)
JB/T500481999
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing
Postal Code 100044)
Format 880X12301/16 Printing Sheet 1/2 Number of Words 12000First Edition in September 1999
First Printing in September 1999
Number of Prints 1-500
Price 10.00 Yuan
99-702
666800
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