JB/T 3713.2-1997 Technical requirements for double disc shot blasting machines

This standard specifies the technical requirements, test methods and inspection rules for double disc shot blasting machines. This standard applies to double disc shot blasting machines (hereinafter referred to as shot blasting machines). JB/T 3713.2-1997 Technical requirements for double disc shot blasting machines JB/T3713.2-1997 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T3713.2-1997
Double Disc Shot Blaster
Published on August 18, 1997
Technical Conditions
Implemented on January 1, 1998
Ministry of Machinery Industry of the People's Republic of China
JB/T3713.2-1997
This standard is a revision of JB3713.2-84 based on the current level of double disc shot blasters in my country and the current status of the use of imported products. In order to meet the needs of domestic and foreign trade, technology and economic exchanges, the technical requirements, test methods, inspection rules and other technical contents of double disc shot blasters are specified.
In order to adapt to the current development of double disc shot blasters and meet the requirements of shot blasting technology, the uniformity of the hardness of blades, shot dividing wheels, directional sleeves and guard plates, the maintainability of shot blasters, the area of ​​​​projectile belts and test methods, the shot blasting rate and test methods, etc. are added. The writing format and related contents have been modified. The contents of JB3713.2-84 that have been proven to be suitable for current requirements in practice are retained. This standard will replace JB3713.2-84 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Foundry Machinery Standardization. Drafting units of this standard: Jinan Foundry and Forging Machinery Research Institute of the Ministry of Machinery Industry, Zhucheng Foundry and Forging Machinery Co., Ltd. The main drafters of this standard: Liu Tongqing, Li Xinsheng, and Sun Yunlong. 1
1 Scope
Machinery Industry Standards of the People's Republic of China
Double Disc Shot Blaster
Technical Conditions
This standard specifies the technical requirements, test methods and inspection rules for double disc shot blasters. This standard applies to double disc shot blasters (hereinafter referred to as shot blasters). 2 Cited standards
JB/T3713.2—1997
Replaces JB3713.2—84
The provisions contained in the following standards constitute the provisions of this standard through reference in this 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. GB/T5226.1—1996
GB6414—86
GB/T1330691
JB164491
JB/T5364—91
JB5545—91
JB/T6331.292
3 Technical requirementsbzxZ.net
Industrial machinery and electrical equipment Part 1: General technical conditions Casting size tolerances
Foundry machinery general Technical conditions for use
Technical conditions for painting of sand treatment and cleaning equipment Technical conditions for safety protection of casting machinery
Method for determination of casting machinery noise Determination of sound pressure level The shot blasting machine shall comply with the requirements of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures 3.1
3.2 The structural parameters of the shot blasting machine shall be based on the shot blasting process requirements required by the workpiece and meet the requirements of the technical documents 3.3 The painting of the shot blasting machine shall comply with the provisions of JB/T5364. 3.4 The electrical system of the shot blasting machine shall comply with the provisions of GB/T5226.1. 3.5 The cover of the shot blasting machine shall be safe and reliable, and the joints of the internal lining and guard plate shall have good sealing. The gap of various types of joints shall not be greater than the provisions of Table 1.
Table 1 Gap of joints
Joint form
The exposed transmission parts of the shot blasting machine shall have reliable safety shields and shall comply with the relevant provisions of JB5545. 3.6
3.7 The impeller, shot wheel, directional sleeve, lining and guard plate should be interchangeable and fixed reliably. 3.8 The hardness of the impeller, shot wheel, directional sleeve and guard plate should be greater than or equal to 50HRC. mm
The difference between the maximum or minimum hardness and the average value of the blades, shot wheels, directional sleeves and guard plates in each shot blasting machine should be within the range of 3HRC.
3.10 The inner diameter surface of the blades, shot wheels, directional sleeves and shot inlet pipes should be flat and smooth, and the dimensional tolerance should not be greater than CT13 grade of GB6414, and meet the relevant regulations.
Approved by the Ministry of Machinery Industry on August 18, 1997
Implemented on January 1, 1998
JB/T3713.2—1997
3.11 The gap between the directional sleeve and the shot wheel shall meet the design requirements, and the gap change caused by eccentricity shall not be greater than 1mm. 3.12 The radial circular runout of the impeller body shall not be greater than 0.15mm. 3.13 The end circular runout of the impeller body shall meet the requirements of Table 2 Table 2 End circular runout of the impeller body
Impeller body diameter
End circular runout
≤360
>360-420
>420500
3.14 The impeller body (without blades) shall be statically balanced, and the static balance torque shall meet the requirements of Table 3. Table 3 Static balance moment of impeller body
Impeller body diameter
Static balance moment
≤360
>360~420
>420~500
≤020
3.15Each eight blades form a group. The weight difference between the blades in the same group should not be greater than 5g, and the weight difference between each pair of blades in relative position should not be greater than 3g.
The bearing should be well sealed and lubricated, and its temperature rise should not be greater than 35℃, and the maximum temperature should not be higher than 70℃. The exposed surface of the directional sleeve should be marked with a positioning mark for adjusting the direction of the ejection port. The shot blaster should have a mark for the direction of rotation of the impeller. The structure of the shot blaster should ensure accessibility and convenience for maintenance. The shot blaster should not have a significant escape of projectiles or dust. The fasteners should not be loose or broken. The impeller speed of the shot blasting machine shall meet the design requirements, and the tolerance shall be within the range of -5% to +5%. The shot blasting amount of the shot blasting machine shall meet the design requirements, and the filling difference shall be within the range of -10% to +10%. The projectile belt area of ​​the shot blasting machine shall comply with the provisions of the shot blasting process. Under the condition of a certain projectile speed, the shot blasting rate shall meet the requirements of the technical documents. 3.26
The shot blasting machine should not make abnormal sounds during operation, and its noise should not be greater than 88dB (A). 3.27
Each shot blasting machine should be equipped with vulnerable spare parts: one set of shot wheel, directional sleeve, guard plate, and two sets of blades and blade fasteners. 3.28
The sign of the shot blasting machine shall comply with the provisions of GB/T13306. Each shot blasting machine shall be equipped with a set of special tools. 4 Test method
The idle operation time shall not be less than 2h. After the idle operation, load operation shall be carried out according to the maximum shot blasting amount. The gap between the guard plates is measured with a feeler gauge. 4.1
Measure the radial runout of the impeller body with a dial indicator on the outer circle of the impeller body. 4.2
4.3Measure the end face runout of the impeller body with a dial indicator at the edge of the impeller body. 4.4
Measure the static balance moment of the impeller body with a static balance test bench. 4.5
Measure the weight difference between the blades with the weighing method. Determination of the hardness of wearing parts
Randomly select three evenly distributed points on the tested surface of the wearing parts and polish them so that the surface roughness R reaches 2um and the polished area is larger than the punch area of ​​the hardness tester. Then fix the wearing parts on a carrier with a certain rigidity and use a hardness tester with an average accuracy of ±1HRC to measure the hardness. The average value of the three-point hardness is the hardness of the wearing parts. 2
JB/T3713.2-1997
For the determination of the hardness difference of blades, shot wheels, directional sleeves and guard plates, three points should be randomly selected on their respective surfaces for determination. Finally, the difference between the maximum and minimum values ​​and the average hardness of the three points should be determined according to the measurement results. 4.7 Determination of bearing temperature rise
After 2 hours of idling, immediately measure the maximum temperature of the bearing housing with a point thermometer, and then add a correction value of 3°C, which is the maximum temperature of the bearing. The difference between the maximum temperature of the bearing and the ambient temperature is the temperature rise of the bearing. 4.8 Under idling conditions, the noise is determined according to the provisions of JB/T6331.2. 4.9 Determination of the projection zone area
Apply black ink or lay a thick paper on a suitable plate or steel strip and place it at the same process parameters as the workpiece being thrown (such as the distance and angle from the ejection port of the shot blaster). Start the shot blasting machine for a few seconds, turn off the shot blasting machine, remove the wooden board to check the shape and area of ​​the shot blasting zone, and compare it with the required shot blasting area. Five adjustments of the shot blasting machine are allowed during this period. 4.10 Determination of shot blasting rate
Start the shot blasting machine, first adjust the shot supply gate so that the shot flow rate reaches the maximum shot supply within the allowable range of the shot blasting machine motor power, the shot inlet pipe should not overflow the shot, and there should still be no shot overflow after 1 minute, then close the shot supply gate and stop the shot supply. Weigh the shot according to the rated shot blasting amount of the shot blasting machine within 1 minute, load it into the shot supply funnel, open the shot supply gate and the stopwatch at the same time, and measure the time required for all the shot in the funnel to flow out. According to the amount of shot loaded and the measured time, convert it into the shot blasting amount per minute. Use the same method to measure three times, and take the arithmetic mean value as the shot blasting amount of the shot blasting machine (in kg/min). While measuring the shot blasting amount, measure the power of the motor corresponding to the measured shot blasting amount, and take the arithmetic mean value as the load power of the motor (in kW)
The ratio of the shot blasting amount to the load power of the motor is the shot blasting rate [in kg/(min·kW)]. 5 Inspection rules
5.1 Each shot blasting machine shall be inspected and qualified by the technical inspection department of the manufacturer before it can be shipped out of the factory with a product quality certificate. The factory inspection shall be carried out in accordance with the provisions of 3.2~3.7, 3.10~3.15, 3.17, 3.18, 3.27, 3.28, and 3.29, and all the items shall be qualified.
5.2 Type inspection
5.2.1 Type inspection shall be carried out in accordance with all the items specified in this standard, and all the inspection items shall be qualified. 5.2.2 Type inspection shall be carried out in any of the following situations: a) When the trial production and identification of new products or old products are transferred to the factory for production; b) After formal production, if there are major changes in structure, process, materials, etc. that may affect the performance of the product: c) When the inspection results are significantly different from the last type inspection: d) When the national quality supervision agency proposes a requirement for type inspection. 5.2.3 If there are unstable factors affecting the performance of the shot blasting machine during the manufacturing process of the manufacturer or the national quality supervision agency conducts a supervision and random inspection of the shot blasting machine, a random sampling inspection shall be carried out on 2% of each batch of shot blasting machines but not less than one, and each shot blasting machine shall comply with the provisions of 5.2.1.
6 Packaging, marking, storage and transportation
The packaging, marking, storage and transportation of shot blasting machines shall comply with the provisions of 7.1 to 7.5 in JB1644-91. 3
Mechanical Industry Standard
Technical Conditions for Double Disc Shot Blaster
JB/T3713.21997
Published and issued by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2 Shouti South Road, Beijing: Postal Code 100044)*
1/16 Sheet 1/2 Words 8000
Book Size 880×1230
First Edition in October 1997
First Printing in October 1997
Print Quantity 0Q,001-500
Price 5.00 Yuan
No. 97-212
Mechanical Industry Standard Service Network: http/AvwwJB.ac.cnL66S
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