Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T 8785—1998
Core Shooting Machine with Mobile Head
1998-07 17 Issued
National Bureau of Machinery Industry
1998-12-01 Implementation
JA/T8785—199B
This standard is issued by the National Technical Committee for Mechanical Standardization and is under the jurisdiction of the National Technical Committee for Mechanical Standardization. The Ministry of Machinery Industry Jinan Thin-Forming Machinery Research Institute and Suzhou Tongli Machinery Factory are the main drafters of this standard: Lu Jun and Zheng Zhen. 1 Scope
Mechanical Industry Standard of the People's Republic of China
Core Shooting Machine with Mobile Head
JB/T 8785-1998
This standard specifies the parameters, technical requirements, test methods, accuracy inspection and inspection rules of the core shooting machine with mobile head. This standard is applicable to core shooting machines for making molded cores (hereinafter referred to as core shooting machines). 2 Referenced Standards
The following standards contain provisions that, through reference in this standard, become the integral texts of this standard. At the time of publication of this standard, the versions shown are valid. All standards are subject to revision: Parties using this standard should investigate the applicability of the latest versions of the following standards: GB/T 1804-H2
C376633
General tolerances for linear dimensions of unmolded components
General technical specifications for filter systems
GB/T 5226.1-19U61
Industrial machinery and electrical equipment - Part 1, General technical specifications GB7932-87
GB/T 1330691
JB/T 1430-53
J2670—82
JH/1 3C00-- 91
JR/T 5365.1-91
Jn554591
JB/T 6331.2
ZB J50 106 88
ZH J50 008.2-6B
ZBJ50011-83
3
General technical requirements for pneumatic systems
Technical requirements for pressure-type and membrane-type molding machinesGeneral technical requirements for casting machinery
General rules for precision inspection of metal cutting machine tools
Model identification method for casting equipment
Method for determination of cleanliness of casting machinerySafety protection technical requirements for casting machinery
Method for determination of noise of casting machinerySound pressure level of metal cutting machine toolsReduction of random technical documents of metal cutting machine toolsGeneral technical requirements for welding parts of metal cutting machine toolsTechnical requirements for painting of machine tools
3.1 The main parameter of core shooting machine is the maximum mass of sand core. 3.2 The power of the core shooter shall comply with the provisions of Table 1. 3.3 The model of the core shooter shall comply with the specifications of Table 9 of JB/T300-51 for core shooters. Approved by the State Bureau of Machinery Industry on 1998-0-17. Implementation on December 3, 1998. Maximum performance of cores. Maximum size of core trays. JB/T8785-1998. Table 1. 1. If agreed upon, the core can be designed and manufactured according to the requirements of the user. 2. Under the conditions of the specified conditions, the total number of core boxes is the recommended value. 4. Technical requirements. 4.1 The core shooter shall comply with the provisions of this standard and shall be manufactured according to the drawings and technical specifications specified in the prescribed procedures. 4.2 The appearance requirements of the core shooter shall comply with the provisions of 5.1~5.7 of JB164491. 4.3 The electrical system of the core shooting machine shall comply with the provisions of GB/T5256.1. 4.4 The various signs of the core shooting machine shall comply with the provisions of GB/T13308. 4.5 The pneumatic system shall comply with the provisions of GB7932, and the valve shall comply with the provisions of GFA766. 4. The replacement of the core shooting machine shall comply with the provisions of ZBJ50(011. 4. The purchased and outsourced parts of the core shooting machine shall comply with the provisions of relevant standards. The lathe manufactured by B method shall not have casting defects such as sand limit, pores and cracks that affect the working performance and appearance. 4.9 The tolerance of the added parts shall comply with the requirements of the m-level tolerance specified in R/T1S04. The quality of the connecting parts shall comply with the provisions of RlJ59008.2. 10
Before assembling, the air bag should be subjected to a pressure test of 1.2MP for a holding time of not less than 30m: the pipes and pipes should be arranged in a straight line, easy to disassemble, and the bending parts should be selected. There should be no three fans, rotation, etc. The moving parts of the core shooter should have good cleaning properties, and the exposed parts should have reliable dustproof measures. The safety protection of the core shooter should comply with the relevant provisions of JB5545. The air and oil cylinder disinfection of the core shooter should comply with the provisions of Appendix A of JB/T1430-93. The random release document of the core shooter should comply with the provisions of ZJ50006. The accuracy requirements should meet the requirements of the table.
Idle operation
4. 1A, 10
The electrical control system should be sensitive, the movement of the flip mechanism should be smooth, there should be no impact during the stroke, the moving bars of the closing and opening mechanisms should be flat, flexible and reliable, and there should be no creeping. The sand shooting action should be correct and reliable.
The action of the forming opening and closing device should be flexible, accurate and reliable. The movement of the shooting head should be smooth during the movement. There should be no obvious impact and it should be in place. The action of the lower mold, the core and the core connection mechanism should be Flexible, reliable, and smooth movement. The action of each station of the core shooter should be accurate, stable, and reliable during operation: air shortage, hydraulic system should not have slippage, and isolation rate should not occur. The rise of the dynamic bearing should not be greater than 35'℃, and the maximum temperature should not be higher than 70℃. The core shooter should produce a sound during operation, and its equivalent continuous sound alarm number should not be greater than 55B (A). The fastening joints of the core shooter should not be loose.
4.19 Load operation requirements
JB/T $785 -1998
4.10.1 The closing, opening and core-removing mechanisms of the sand injection process should be tight and should not yield or cause any loss. 4.19,2 The movement of the injection head moving mechanism should be smooth and pushable at the beginning and end, without obvious impact, and should be in place slowly. The moving parts of the mold opening and core ejection should be smooth, flexible and reliable, and should not cause any obstruction or skew. 4.19.3
4.19,4 The movement of the sand adding opening and closing device should be flexible. Accurate and reliable, there should be no leakage of sand during the addition of sand, the core-joining machine should be stable, accurate, and the joint mechanism should not produce any signs of loss or movement, 4.19.5
The core shooting machine should be accurate and accurate, and should not be advanced or delayed. Under the rated working pressure, the maximum pressure drop of the air bag in the sand-shooting machine should be greater than 25% of the working width H, 4.19.7
4.10.8 The quality should be stable after 20 sand cores are made. 4.19.9 The automatic working time of the core-shooting machine should meet the design requirements. 5 Test method
5.1 The cleanliness is determined by the force method specified in JR/T5365.1. 5.2 Idle operation test method
3.3.1 The idle operation time of the core-shooting machine should not be less than 4h5.2.2 After the single movement of the moving parts in the manual test is normal, the automatic cycle test should be carried out. 5.2.3 The noise of the radiator shall be determined according to the method of 6331.2. 5.2.4 Determination of bearing temperature rise After 1 hour of continuous idling, use a spot thermometer to measure the external temperature of the bearing seat and add 3 correction values, which is the maximum temperature rise of the bearing. The difference between the maximum shaft temperature and the ambient temperature is 5.3 Load operation test method 5.3. Before load operation test, a load operation test should be carried out first. The idling time should be less than 4 hours. 5.3.2 After the process is adjusted, the process parameters of each sequence should be adjusted. Under the specified load compensation conditions, 20 sand cores should be continuously shot. S. 3. 3 Determination of automatic working time Under the rated load conditions, measure the time when the core shooting machine is screened once, for a total of three times. Take the average of the three times, which is the operating time of the core shooting machine. 5.4 Precision inspection 5.4.1 Before the precision inspection, a preliminary adjustment should be carried out. The adjustment method is shown in Table 2. Table 2 Pre-leveling tools and tools for leveling, check according to method 1. Place the bridge board on a guide column and adjust the water level 2. Restore the bottom level, change the original level to the special bridge, and adjust the horizontal water level 5.4.2 The accuracy of the new core machine should be inspected according to the requirements of Table 3. The accuracy of the inspection tools listed in the table should meet the requirements of Class B measuring tools in Appendix A of 3H2670-82.
Quick inspection frequency
shooting head lower level
(Congxin takes I
China's parallel shop
left and right but
plate change box installation
center facing the plate
projection surface vertical
lower mold opening gas
jiang center
half||||heating plate original
: surface remaining heating
mold flat chain positioning
surface equidistance
shooting head replacement
other position auxiliary
JB/T B785—1998
Qiu Ji Jingyu
Inspection tools
Digital indicator,
! Digit indicator base
rule, angle ruler
digital indicator,
ear meter on the bed
depth representative
percentage selling,
digital indicator
sexual integrity
grid shooting head recommended to extreme low point, grid has 3.0. The 2/100 dial indicator is placed on the left (right) b, 0.2/100 effective (or core capsule) dial indicator probe and special head are placed flat. Switch the dial indicator to move the indicator in the two directions of 0 and h to measure the weight. The white dial indicator is used to determine the effective difference at two points. The blue dial is used to measure the parallelism of the plate under the horizontal plane. The gain value at point 8.1.2 is the standard value, b, 3.4 The point system can be used for parallelism. Place one side of the angle ruler tightly on the left (right) hot plate surface and use a feeler gauge to measure the most perpendicular point to the heating plate core disk installation surface, which is its verticality. Set the mold opening air rainbow on the top plate of the combustion plate and install the dial indicator. The probe will touch the surface, and then the air will rise and fall. The amount caused by the dial indicator is the parallelism. The future degree ruler will be 1.2mm on the plate surface, and the ruler will be adjusted Measure the height of each level, and the maximum value is the percentage of its equidistance. Set the band: 0.6 On both sides of the heating blood, make the probe touch the opposite side of the sand shooting position and adjust it to the dynamic operation. The shooting is in the complex movement. The difference between the recorded inverse number of the self-diameter table and the average value of the five readings is its true position estimation. 6 Inspection rules 6. Inspection and supervision are divided into factory inspection and type inspection. 6.2 Factory inspection JB/T BT85—1558
6.2.1 Each core shooting machine shall be inspected and certified by the technical inspection department of the manufacturer and shall be accompanied by a product quality certificate before it can leave the factory. G.2.2 The factory inspection of the core shooting machine shall be carried out in accordance with 4.2, 1.4, 1.6, 4.12, 4.13, 4.16.4.17 and 4.18. 6.3 Type inspection
6.3.1 Type inspection shall be carried out in the following cases: a) New production or transfer of old products! During the production trial type inspection:) When the structure, materials, and process of the product have changed significantly after the production is stopped, which may affect the performance of the product; e) When the product has been discontinued for more than 1 year and normal production is resumed; ) When the factory inspection result is significantly different from the last type inspection:) When the national quality supervision agency proposes the requirement for type inspection, 6.3.2 During the type inspection, 2 products that have passed the factory inspection shall be randomly selected, but each inspection shall be less than 100. 3.3 The type inspection shall be carried out on all items specified in the standard, and all the inspected items shall be qualified. (.3.4 If the manufacturer does not have the conditions for type inspection, the user factory is allowed to conduct type inspection. 7 Packaging, transportation and storage bzxz.net
The packaging, transportation and storage of the core shooting machine shall comply with the provisions of Chapter 7 of JB164491. Company
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