JB/T 6308-2000 This standard is a revision of JB/T 6308-1992 "Technical Conditions for Centrifugal Pipe Casting Machines". The scope of application of the revised standard has been increased; "terminology" and requirements for the materials of main parts have been added; the noise limit has been divided into grades according to the power of the motor; the first overhaul period has been deleted. This standard specifies the terminology, technical requirements, geometric accuracy, test methods and inspection rules of centrifugal casting machines. This standard applies to horizontal cantilever centrifugal casting machines (diameter is greater than 1m, length is not greater than 1m), vertical centrifugal casting machines (diameter is not greater than 1.8m, height is not higher than 0.8m) and horizontal roller roller casters Casting machine (diameter not larger than 1m, length not larger than 6m). This standard was first published in 1992. JB/T 6308-2000 Technical conditions for centrifugal casting machine JB/T6308-2000 Standard download and decompression password: www.bzxz.net

ICS77.180
J61
JB
Machinery Industry Standard of the People's Republic of China
JB/T6308-2000
Centrifugal Casting Machine
Technology Conditions | |tt |
Foreword
This standard is a revision of JB/T6308-1992 (Technical Conditions for Centrifugal Pipe Casting Machine). The main differences between this standard and JB/T6308-1992 are as follows:
Standard Different names:
Different scope of application:
Added a "Terminology" chapter:
Added requirements for the materials of main parts: Noise limits are divided according to the power of the motor File: 1 The provisions of the first overhaul period are deleted.
This standard replaces JB/T6308-1992 from the date of implementation. This standard is proposed and centralized by the National Foundry Machinery Standardization Technical Committee. This standard is drafted by: Tianshui Casting. Machinery Factory, Jinan Chain Forging Machinery Research Institute. The main drafters of this standard: Ma Pingan, Li Huizhen, and Lu Jun. This standard was first released in July 1992
Scope
1|| tt||Machinery Industry Standards of the People's Republic of China
Centrifugal casting machine technical conditions
Centrifugal casting machine-Technical requirementsJB/T63082000
Replaces JB/T 6308—-1992
This The standard specifies the terminology, technical requirements, geometric accuracy, test methods and inspection rules of centrifugal casting machines. This standard applies to horizontal centrifugal casting machines (diameter not larger than 1m, length not larger than 1m) and vertical centrifugal casting machines. (diameter not more than 1.8m, height not more than 0.5m) and horizontal roller centrifugal casting machine (diameter not more than 1m, length not more than 6m) (hereinafter referred to as centrifuge)
2 cited standards|. |tt||The provisions contained in the following standards constitute provisions of this standard by reference in this standard. The edition indicated is valid at the time of publication of this standard. All parties using this standard are subject to revision. Explore the possibility of using the latest version of the following standards: GB/T1184—1996
GB/T3766—1983
GB/T 5226.1—1996
GB/T7932—1987||tt| |GB/T13306—1991
JB/T1430—1993
JB/T1644—1991
JB/T 5365.11991
JB5545—1991
JB/ T 6331.2—1992
JB/T 8356.11996
JB/T9875—1999
3 terminology
3.1 flange
Shape and position tolerances not noted Difference
General technical conditions for hydraulic systems
Industrial machinery and electrical equipment Part 1: General technical conditions General technical conditions for pneumatic systems
Signs
Vibration type, vibration type Technical conditions of molding machines General technical conditions of foundry machinery
Measurement method of clarity of casting machinery Gravimetric method Technical conditions of safety protection of casting machinery
Measurement method of noise of casting machinery Sound pressure level determination Technical conditions of machine tool packaging|| tt||Compilation of random technical documents for metal cutting machine tools. Parts used to install the chain type and detect the accuracy of the centrifuge on the main shaft end of the horizontal cantilever centrifugal casting machine or vertical centrifugal making machine. 3.2 Supporting wheel
The part on the main shaft of horizontal and supporting roller centrifugal casting machines that is used to support the rotation of the casting mold. 3.3 Casting
The process speed is controlled by the supporting wheel barrier to undertake the parts of liquid metal skin castings. State Machinery Industry Bureau approved 2001-01-01 implementation on 2000-09-28
4 Technical requirements
4.1 General requirements
JB/T6308—2000
4.1.1 The centrifuge shall comply with the provisions of this standard and shall be manufactured according to the drawings and technical documents approved by the prescribed procedures. 4.1.2 The purchased parts of the centrifuge should comply with the standards and relevant documents, and should be accompanied by a product quality certificate. 4.1.3 The hydraulic system and pneumatic system of the centrifuge should comply with the relevant regulations of GB/T3766 and GB/T7932. 4.1.4 The electrical system of the centrifuge should comply with the relevant regulations of GB/T5226.1. 4.1.5 The safety protection of the centrifuge should comply with the relevant provisions of JB5545. 4.1.6 The material of the main shaft of the centrifuge should not be lower than 45 steel, and the quenching and tempering hardness should be 225~255HB. 4.1.7 The material of the transmission shaft of the centrifuge should not be lower than 40Cr steel, and the tempered hardness should be 225-255HB. 4.1.8 The material of the large gear of the vertical centrifugal casting machine should not be lower than 40Cr steel, the material of the small gear should be better than that of the large gear, and the tooth surface hardness should be 56~64HRC.
4.1.9 The surface hardness of the outer edge of the supporting wheel should reach 50~55HRC, 4.1.10 The outer surface hardness of the casting supporting wheel rim of horizontal and supporting roller centrifugal casting machines should reach 45~50HRC. All exposed surfaces and welds of the centrifuge should be smooth and clear, and should not have defects such as unevenness, slag inclusions and cracks. 4.1. 11
4.1.12
The various pipelines on the centrifuge should be tightly arranged and arranged neatly, and there should be allowance for expansion and contraction required for movement or temperature changes. The painting of centrifuges should comply with relevant standards. 4.1.13
The cleanliness of the centrifuge should comply with the provisions of Appendix A in JB/T1430-1993. 4.1.14
Each centrifuge should have a product label fixed in a conspicuous position, and the label should comply with the regulations of GB/T13306. 4.1.15
4.1.16
The accessories and spare parts provided should be complete.
The accompanying technical documents should include product instructions, product certificate and packing list. The preparation of random technical documents should comply with the provisions of JB/T4.1.17
9875.
4.2 Geometric accuracy
4.2.1 The geometric accuracy of the horizontal suspended-hip centrifugal preparation machine should comply with the requirements in Table 1. 4.2.2 The geometric accuracy of the vertical centrifugal casting machine should comply with the requirements in Table 2. 4.2.3. The geometric accuracy of horizontal and roller centrifugal casting machines should comply with the requirements in Table 3. 4.3 Requirements for dry operation and load operation
4.3.1 The centrifuge should be subjected to an idling test in accordance with the requirements of the technical documents. The continuous idling time should not be less than 4 hours. After the idling test, the centrifuge should be operated under load. The time should not be less than 4h. 4.3.2 The various working mechanisms, operating mechanisms and safety protection devices of the high-speed core machine should be flexible, reliable, coordinated with each other, and run smoothly. 4.3.3 The electrical system, hydraulic system, and pneumatic system should work in a coordinated, sensitive, and reliable manner. 4.3.4 All fasteners, pipes, and circuit connections should not be loose. 4.3.5 The hydraulic system, pneumatic system and cooling system should not leak oil, air or water. 4.3.6 When the centrifuge is running dry, if the motor power is less than or equal to 37kW, its noise sound pressure level should not exceed 80dB (A); if the motor power is greater than 37~110kW, its noise sound pressure level should not exceed 85dB (A). : If the motor power is greater than 110kW, its noise sound pressure level should not exceed 90dB (A).
4.3.7 After 4 hours of continuous idling operation, the temperature rise of the bearing should not exceed 35°C, and the maximum temperature of the bearing should not be higher than 70°C. 4.3.8 After 4 hours of continuous idling operation, the working fluid temperature of the Liquid Le system should not be higher than 60°C. 4.3.9. Under normal working conditions, 10 qualified castings should be cast continuously by physical pouring. 2
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5 Test Methods
5.1 Accuracy inspection shall be carried out according to 4.2 of this standard. JB/T63082000
5.2. Cleanliness should be measured according to the method specified in JB/T5365.1. 5.3 Noise should be measured according to JB/T6331.2. 5.4 Determination of bearing temperature rise
After 4 hours of continuous idling operation, immediately use a point thermometer to measure the maximum temperature of the bearing housing shell, and then add a 3°C correction value, which is the maximum temperature of the bearing. The temperature rise is equal to the bearing The maximum temperature minus the ambient temperature. 6
Inspection regulations
Inspection is divided into factory inspection and type inspection.
6.1 Factory inspection
6.1.1 Each centrifuge must pass the factory inspection and be accompanied by a product quality certificate before leaving the factory. 6.1.2 Factory inspection shall be carried out in accordance with the dry operation requirements in 4.1.11~4.1.13, 4.1.15~4.1.17, 4.2 and 4.3 of this standard. 6.1.3 All factory inspection items should be qualified. 6.2 Type inspection
6.2.1 Type inspection shall be carried out when any of the following situations occurs: a) Trial type identification of new products or old products transferred to factory for production: b) After formal production, such as structure, material, process When there are major changes that may affect product performance; c) When the product has been discontinued for more than 1 year and is resumed; d) When the factory inspection results are significantly different from the last type inspection results; e) The national quality supervision agency proposes type inspection requirements hour. 6.2.2 Type inspection items are all items specified in this standard, and all inspected items should be qualified. 6.2.3 Type inspection should be conducted on random sampling of 2% of each batch of centrifuges, but not less than one unit at a time. 6.2.4 When the manufacturer does not have the conditions for type inspection, type inspection is allowed at the user's factory. Packaging, marking, storage and transportation
Centrifuge packaging, marking, storage and transportation should comply with the provisions of 7.4 and 7.5 in JB/T8356.1 and JB/T1644--1991.
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