Some standard content:
ICs77.120,81.060
Registration No. 1976-1998Www.bzxZ.net
Chemical Industry Standard of the People's Republic of China
HG/T 3108-1998
Chilled cast iron roller
Chilled cast iron rol
Published on 1998-03-17
Implemented on 1998-10-01
Published by the Ministry of Chemical Industry of the People's Republic of China HG/T3108-1998
This standard adopts the Japanese Rubber Association standard in technical content, and is revised based on the Japanese Rubber Association standard SRIS "Open Rubber Mixing Mill Roller" and "Open Rubber Mixing Mill". This standard combines my country's requirements for product quality and adds several performance inspection rules on the basis of HG/T3108-1988. At the same time, the chemical composition index requirements of the product are arranged in Appendix A. Appendix A and Appendix B of this standard are both indicative appendices. After the revision of this standard, it further emphasizes the mechanical properties, hardness value, and whiteness of the roller. From the date of implementation, this standard will replace HG/T3108-1988. This standard is proposed by China Chemical Equipment Corporation. This standard is under the jurisdiction of the National Rubber and Plastic Machinery Standardization Technical Committee. The drafting unit of this standard is Shanghai Cold Casting and Rolling Plant. The main drafters of this standard are Sun Rongqing and Sheng Jingming. This standard was first issued in December 1982 and was released in September 1988. The quality of the roller is measured by indicators such as the first and second indicators.
1 Scope
Chemical Industry Standard of the People's Republic of China
Chilled cast iron roll
Chilled cast Iron roll
HG/T3108—1998
Replaces HG/T5-3108-1998
This standard specifies the definition, type and classification, requirements, inspection rules, marking, packaging, transportation, storage and manufacturer's warranty of chilled cast iron rolls. This standard applies to chilled cast iron rolls used in the rubber and plastics industry. 2 Cited Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in the standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB191—90
Pictorial symbols for packaging, storage and transportation
GB223.1~2—81 Determination of carbon and sulfur contents in steel and alloys GB223.3~6--88 Determination of phosphorus, manganese, silicon and boron contents in steel and alloys GB5612—85
Method for indicating cast iron grades
GB/T13384-92 General technical conditions for packaging of electromechanical products HG/T 3118—1998 Inspection methods for chilled cast iron drums 4 Fresh 3 Definitions
This standard adopts the following definitions.
3.1 White cast iron refers to the part of the roller working surface that is completely chilled without graphite precipitation. 3.2 Pockmarks refer to the transitional structure between the white cast iron area and the gray cast iron area on the roller working surface, that is, part of the carbon exists in the form of graphite and part exists in the form of iron carbide. Its fracture characteristics are white bright structure with gray-black spots, and the fracture is dark gray. 3.3 The gray cast iron area is the free carbon in cast iron, which exists in the form of stone. 3.4 The roller working area refers to the part where the roller working surface directly contacts the material. 3.5 The roller journal part includes the installation of the sealing ring (flange stop), the installation of the bearing (bearing stop), and the installation of the gear (gear stop). 4 Types and classifications
4.1 Rollers are divided into cylindrical hollow rollers and circular roller peripheral drilling rollers, see Figure 1 (a) and (b). 4.1.1 The main size parameters of commonly used rollers refer to Appendix B (suggested appendix). 4.1.2 The roller journal bearing installation can adopt a steel sleeve structure. 4.1.3 The working surface of the roller can be processed into grooves as required. 4.2 The chilled cast iron roller is divided into ordinary chilled cast iron roller and alloy chilled cast iron roller. The markings shall comply with the provisions of Table 1. Approved by the Ministry of Chemical Industry of the People's Republic of China on March 17, 1998 and implemented on October 1, 1998. 5 Requirements Roller classification Ordinary chilled cast iron code Alloy chilled cast iron code HG/T3108-1998 Table 1 Roller classification LTG—H Note: \LT\ is the chilled cast iron code specified in GE 5B12, "G\" means "code", \P\ means "ordinary" and "H" means "alloy" 5.1 Rollers shall comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved in the prescribed procedures. 5.2 After mechanical processing of the roller surface, the depth of the chilled area and the surface hardness shall comply with the requirements of Table 2. 5.3 After mechanical processing of the roller surface, the cold hard layer (the sum of the depth of the chilled area and the depth of the pitted area) shall not be greater than 1/2 of the wall thickness of the roller working surface. 5.4 Mechanical properties
The tensile strength of the gray cast part of the roller shall not be less than 180N/mm2. The bending strength of the gray cast part of the roller shall not be less than 360 N/mm2. 5.5 Refer to Appendix A (Suggestive Appendix) for the melting chemical composition of the roller. 5.6 The coaxiality tolerance of the roller journal surface and the unmachined inner surface shall comply with the provisions of Table 3. Item
White cut depth mm
Working surface
Jaw surface
Ordinary chilled cast iron roller
Alloy chilled cast iron roller
Ordinary chilled mirror iron roller
Alloy chilled cast iron roller
HG/T 3108-1998
Table 2 White cut depth and surface hardness
Roller shaft
2250~-400
35~~48
When the roller journal adopts a steel sleeve structure, the surface hardness of the steel sleeve shall not be less than HSa0. When the end surface of the roller working surface adopts a post-hole structure, the depth of the white port is 5~20. After the roller working surface is grooved, the lower limit of the white port depth at the bottom of the groove is 3mm. mm
>400--500
Table 3 Coaxiality tolerance between the roller journal surface and the unprocessed inner surface Roller diameter
Tolerance value
5.7 Defect regulations
≥250~400
>400~500
5.7.1 Cracks are not allowed in the roller.
5.7.2 There are no defects such as pores, sand holes, and looseness in the roller working area. The roller non-working area (referring to the baffles at both ends) is allowed to have pores and sand holes with a diameter of less than 2mm, and the number shall not exceed 3. 5.7.3 The surface of the roller journal where the bearing is installed is not allowed to have pores, sand holes, and looseness. At the gear installation location, air holes and sand holes with a diameter of less than 3mm are allowed, and the number shall not exceed 3. 5.8 Machining requirements
5.8.1 The inner hole corresponding to the roller working surface must be processed, and its surface roughness Ra value shall not exceed 50μm. VII.8.2 The size and surface roughness of the roller shall comply with the relevant provisions of the rubber and plastic machinery product standards for rollers. 5.8.3 When the roller is roughly processed before leaving the factory, its surface roughness Ra value shall not exceed 25μm, and a processing allowance shall be left. The processing allowance and its limit deviation shall comply with the provisions of Table 4.
Table 4 Processing allowance and limit deviation requirements
Working surface
Limit deviation
Limit deviation
5.9 For rollers that are to be subjected to water pressure test after mechanical processing, the test pressure is as specified in Table 5, and the pressure test shall not be adjusted for 10 minutes. -:com6 Inspection rules
Roller use
Roller for rubber calender
Roller for open plastic purifying machine
Roller for plastic calender
HG/T3108-1998
Test pressure
Note: The test pressure of rollers for rubber and plastic machinery with other special requirements is 1.25 times the working pressure of rollers. MPa
6.1 Rollers must be inspected and qualified by the quality inspection department of the manufacturer before leaving the factory. A quality certificate should be attached when leaving the factory. The inspection method shall be in accordance with the provisions of HG/T3118.
6.1.1 Inspection content
Rollers shall be inspected in accordance with the contents of 5.2~5.4 and 5.6~5.9 of this standard when leaving the factory. 6.1.2 The inspection of the depth of the cold hard layer of the roller shall be carried out in accordance with the inspection method of HG/T3118. 6.1.3.1 Determination of mechanical properties: First, a bending test can be conducted. If two of the three samples are qualified, the roller material is qualified. If the bending test fails, a tensile test can be conducted. If two of the three samples are qualified, the roller material is qualified. If the mechanical properties test in 6.1.3.2 fails for the first time, a re-inspection is allowed in the same batch and grade according to the requirements of 6.1.3.1, or a sample test can be taken at the neck of the roller.
6.1.3.3 Mechanical property inspection frequency: Under the condition of stable raw materials and production process, regular sampling inspection should be carried out. For rollers with a diameter of ≤400mm, it should be inspected once for every 100 pieces. For rollers with a diameter of 400mm, it should be inspected 3 times for every 100 pieces. For monthly production of less than 100 pieces, it should be inspected at least once every three months. Marking, packaging, transportation, storage
7.1 Before leaving the factory, the rollers must be stamped with the following marks on the end face of the mounting gear: a) manufacturer's name or trademark;
b) the mark specified for the rollers,
e) the date of manufacture.
7.2 Roller packaging
7.2.1 Before packaging the rollers, dirt and metal chips should be removed, and the surface should be coated with a rust inhibitor to prevent corrosion during transportation and storage. Under normal transportation and storage conditions, the manufacturer should ensure that there is no rust within half a year from the date of shipment.7.2.2 Roller packaging should comply with the provisions of GB/T13384. 7.2.3 The graphic signs for the packaging, storage and transportation of rollers shall comply with the provisions of GB191. 7.3 The transportation of rollers shall comply with the relevant regulations of the transportation department. 7.4 Rollers shall be stored in rainproof and ventilated warehouses or indoors and kept properly. 8 Manufacturer's guarantee
When the provisions of this standard on transportation and storage are followed and the relevant machines are used correctly, the manufacturer guarantees that the rollers will have a warranty period of 9 months for grooved rollers and 12 months for other rollers from the date of use. Note: Rollers used to crush old rubber are excluded. W.Al
The chemical composition of rollers is shown in Table A.
Classification of rollers
Ordinary chilled cast iron rollers
Nickel-1
Molybdenum-chromium
LTG--P
1Other ingredients may be added after agreement between the two parties.
HG/T3108--1998
Appendix A
: (Suggested Appendix)
Table A Chemical Composition
2 In the chemical composition, except for the carbon content, the content of other chemical components is allowed to have a deviation of 10%. The silicon content of the tube with a tube diameter of ≤250mm is allowed to be 0.3% ~1.2%,
A2 The chemical composition analysis method shall be carried out in accordance with the methods specified in GB223.1~2 and GB223.3~6. A3 The ultrasonic flaw detection of composite casting tube shall be carried out in accordance with the provisions of HG/T3118. .Working surface diameter
Working surface length L
Working surface diameter
Working surface length
HG/T3108-1998
Appendix B
(Suggested appendix)
Summary of main dimensional parameters
106560
People's Republic of China
Chemical industry standards
Summary of chilled cast iron
HG/T3108—1998
Editor China Chemical Equipment Corporation
Postal code 100011
Printing Beijing University of Chemical Technology Printing Plant
All rights reserved. No reproduction allowed
Format 880×1230
1/16 Printing sheet 0. 75 Words 13. 5 Thousand words First edition September 1998
First printing September 1998
Print run 1-200
Cost: 6 yuan
8661-8018/0
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