Some standard content:
Machinery Industry Standard of the People's Republic of China
JB/T51065-1999
Quality Classification of Milk Separator Products
(Internal Use)
Published on December 30, 1999
National Bureau of Machinery Industry
Implementation on June 1, 2000
JB/T51065-1999
This standard is a revision of JB/T51065.1~51065.3-94 "Quality Classification of Milk Separator Products". During the revision, the original standard was edited, and the main technical content remained unchanged. This standard replaces JB/T51065.1~51065.3-94 from the date of implementation. This standard was proposed and managed by Hohhot Animal Husbandry Machinery Research Institute. The drafting unit of this standard: Hohhot Animal Husbandry Machinery Research Institute. The main drafter of this standard: Yang Tiejun.
1 Scope
Machinery Industry Standard of the People's Republic of China
Raw Milk Separator Product Quality Classification
(Internal Use)
This standard specifies the quality classification indicators, test methods and inspection rules for raw milk separators. JB/T51065-1999
Replaces JB/T51065.1~510653-94
This standard applies to the quality classification of small disc centrifugal separators (hereinafter referred to as separators) that separate milk into milk fat and skim milk. 2 Referenced Standards
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 are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T2828—1987
JB/T5673—1991
Batch inspection counting sampling procedures and sampling tables (applicable to continuous batch inspection) General technical conditions for painting agricultural and forestry tractors and machinery Technical conditions for milk separators
JB/T 7767.1—1995
JB/T7767.2—1995
3 Quality classification of separators
Test methods for milk separators
3.1 Separators shall comply with the requirements of this standard and be manufactured according to product drawings and technical documents approved through prescribed procedures. 3.2 Separators shall be divided into three grades: superior, first-class and qualified according to the technical level and quality level of the products. The classification indicators are shown in Table 1. 4 Test methods
4.1 General requirements
4.1.1 The equipment, instruments and tools used before the test shall be calibrated. 4.1.2 The test conditions shall comply with the provisions of JB/T7767.2. 4.2 Test methods
4.2.1 Acceptance of packaging and complete machine integrity
4.2.1.1 Check the firmness of the seal and packaging box. For sampling among users, the box can be directly unpacked for inspection; for sampling at the manufacturer, the car can be unpacked for inspection after running on a rural road for 1 hour. Check whether the parts are tight in the box. 4.2.1.2 Check whether the technical documents, random tools, spare parts and accessories are complete one by one according to the packing list. 4.2.1.3 Check according to the general assembly drawing of the components and the assembly drawing of the complete machine. No missing parts or wrong installation are allowed. 4.2.2 Weight of the complete machine
Weigh its net weight on the scale (the lubricating oil should be drained). The accuracy of the scale is 0.1kg4.2.3 Paint quality
The paint quality is checked in accordance with the provisions of JB/T5673. 4.2.4 Safety device
Approved by the State Bureau of Machinery Industry on December 30, 1999, implemented on June 1, 2000
JB/T51065-1999
Check whether the protective covers of the rotating parts are complete, whether the wires are heat-insulated, waterproof and insulated according to the product drawings and technical documents. 4.2.5 Operation stability
When the separation bowl speed reaches the rated speed, observe whether the rotation is flexible, and whether there are any abnormal phenomena such as collision and jamming. 4.2.6 Anti-rust inspection
If there are still rust spots after wiping the rust with a cloth, it is considered as rust. After determining the number of rust spots, measure the size of the spots with a steel ruler. 4.2.7 Surface quality of stamped parts
Inspect the milk basin, oil flow device, milk flow device, funnel, float, separator and separator cover to determine whether there are cracks, burrs, sharp edges, wrinkles and scratches and the degree of defects. 4.2.8 Milk basin leakage
Close the switch, place the measuring cylinder under the milk basin, add two-thirds of the volume of water into the milk basin, and calculate the total leakage within 5 minutes. 4.2.9 Separation bowl sealing
Tighten the separation bowl nut, fill it with water and place it on the test paper for 5 minutes to check whether it leaks. 4.2.10 Number of separators
Check the number of separators according to the product drawing requirements. 4.2.11 Mutual positioning measures for separation bowl parts According to product requirements, observe whether there are positioning measures and their reliability. 4.2.12 Separation plate edge gap
Remove the separation bowl cover, replace it with a special inspection tool, re-tighten the copper nut, and check with a thickness gauge. 4.2.13 Inspection of transmission box sealing, separation bowl cover, and separation bowl base cracks During the work, the static joint surface is not wet when touched, and the dynamic joint surface is visually leak-free. Observe the cracks of the separation bowl cover and base, and use non-destructive testing equipment for inspection when necessary.
4.2.14 The dynamic balance of the separation bowl, the fat content of skim milk, the volume ratio of milk fat to skim milk, noise, pure hourly productivity, kilowatt-hour output, amplitude, strength test, and comprehensive deviation of spring stiffness shall be carried out in accordance with JB/T7767.2. 4.2.15 Total working life, life at the first overhaul, 600h service reliability, and trouble-free operation time 4.2.151 The trouble-free operation time is the time when the first part is damaged. If the specified life of the wearing part is lower than the index, it should be replaced on time. If it is damaged again, it is also considered that the index has not been met.
4.2.152 On a special life test bench, the test should be carried out continuously at the rated speed of the separator with water as the test object. Before the test, measure the size of the worn parts of the wearing parts and make marks. After completing the reliability and life tests, retest them respectively. During the test, the time should be checked and recorded. For parts that are specified as wearing parts, the wear, scrapping and damage should be recorded during the test. After the test reaches 600h, the reliability is calculated according to formula (1).
Where: K is the reliability;
T,—pure working time, h;
T is the sum of the time to eliminate failures in the test, h. x100%
4.2.15.3 During the test, the test water is replaced every 500h. (1)
4.2.154 During the test, the fat content of skim milk and the volume ratio of milk fat to skim milk shall be measured at the beginning, middle and end of the test. The results shall meet the requirements of JB/T7767.1. 4.2.155 Normal maintenance shall be carried out during the test. 5 Inspection rules
Defect classification
Any item that fails to meet the requirements of this standard is considered a defect. According to the degree of influence on product quality, it is divided into two categories: major defects and minor defects. Major defects are divided into two groups: A and B, and minor defects are divided into two groups: C and D. Defect classification and grouping are shown in Table 2. 5.2 Sampling plan
5.2.1 This standard uses a normal sampling plan as specified in GB/T2828, and specifies the use of special inspection level S-2. 5.2.2 Milk separators are divided into three grades: superior, first-class and qualified. Each grade is classified and grouped according to defects, and the AQL value and its corresponding qualified judgment number Ac and unqualified judgment number Re are given respectively. See Table 3. 5.2.3 Take N=16~25 units as an inspection batch, but the size of N is not limited when sampling among users. For 9N1000 and 9N500 models with small batches, N can be appropriately reduced.
5.2.4 Samples are randomly selected from the submitted inspection batch (products within the past six months) by surprise sampling. 5.3 Evaluation rules
5.3.1 During the inspection, conclusions should be drawn for each type and group of defects, and acceptance or rejection conclusions should be made according to the sampling judgment plan in Table 2. When the number of defects in the inspected group is less than or equal to Ac, the entire batch of products is finally judged to be accepted; when the number of defects in any one or more of the inspected groups is greater than or equal to Re, the entire batch of products is judged to be rejected. 5.3.2
Evaluate item by item,
The lowest level of each group of defects in the defect classification table is the product grade table 1 Grading index
Fat content of skim milk
Volume ratio of milk fat to skim milk
Sealing performance of separation bowl
Dynamic balance of separation bowl
Comprehensive deviation of spring stiffness
Strength test
KWh output
L/(KW · h)
Machine weight
Pure hourly productivity
100-1000L
Superior product
Quantity classification
1:3-1: 12
No leakage
No secondary residual deformation
Electric type: ≤85
Qualified products
Hand-cranked type: ≤70
Not greater than the design value
Not less than the design value
Inspection of cracks in the base of the separation bowl
Inspection of cracks in the cover of the separation bowl
Total working life
50~100L
500~1000L
Life of the first overhaul
600hReliability in use
Fault-free operation time
Leakage of milk basin
Number of separation pieces
Edge gap of separation pieces
Separator operation||tt| |Sealing of transmission case
Safety device
Rust prevention inspection
50~100L
50-100L
200~500L
50-100L
200-1000L
Surface quality of stamping parts
Painting quality
Integrity of the whole machine
100-1000L/h Mutual positioning measures of separation bowl parts
Packaging reliability
JB/T51065-1999
Table 1 (end)
Quality grading index
Superior product
≥ 3300
≥ 5500
≥13000
≥1400
≥2300
≥ 4500
≤ 20
No cracks
No cracks
≥3200
≥5300
≥12000
≥1300
≥2200
≥4200
Design value
Qualified products
≥ 3000
≥ 5000
≥10000
≥1200wwW.bzxz.Net
≥2000
≥4000
No collision, jamming or other abnormal phenomena
Flexible rotation,
No leakage
After adjustment
No leakage
After adjustment
Slight leakage| |tt||1. Rotating parts should have reliable protective covers; 2. Wires should be heat-insulated,
without cracks, burrs, sharp edges and obvious
wrinkles,
waterproof,
well-insulated
without obvious
scratches, burrs, sharp
edges and wrinkles,
with cracks
in compliance with JB TQ-2-1-DM in T5673 shall not have serious scratches, wrinkles, burrs, sharp edges, and shall not have cracks. TQ-2-2-DM in JB/T5673 shall comply with the accessories, attachments, and random documents. The whole machine shall not be missing any parts and shall comply with JB/T7767.1 regulations
Vertical shaft gear fixed chord teeth
Thick wear 70%
Copper gear fixed chord teeth of one station
Thick wear 70%
Measure the leakage volume for 5 minutes
The sum of the arc lengths of a group of separator contact parts
shall not be greater than
1% of the circumference of a separator
1. Any contact with milk 2. Separation bowl and device parts
Any part not in contact with milk
is allowed to have rust spots with a diameter not exceeding
2mm
Including the installation position number between the separation pieces
JB/T51065-1999
Defect classification and grouping
The volume ratio of milk fat to skim milk is insufficient
The sealing of the separation bowl does not meet the requirements
600h service reliability does not meet the requirements
The fat content of skim milk is out of tolerance
The dynamic balance of the separation bowl is out of tolerance
The comprehensive deviation of spring stiffness is out of tolerance
The base of the separation bowl is cracked
Insufficient trouble-free operation time
The cover of the separation bowl is cracked
Strength test is not enough
Electricity output is insufficient
Amplitude exceeds tolerance
Noise exceeds tolerance
Productivity is insufficient
Life at the first overhaul is insufficient
Uneven gap between the edges of the separator
Total working life is insufficient
The sealing of the transmission box does not meet the requirements
The number of separators does not meet the requirements
The weight of the whole machine exceeds tolerance
Milk basin leakage exceeds tolerance
The surface quality of stamping parts does not meet the requirements
Unstable operation of the separator
Safety device does not meet the requirements
Rust-proof inspection is unqualified
100-1000L/h Separation bowl parts have insufficient mutual positioning measures. Paint quality inspection does not meet the requirements
The integrity of the whole machine does not meet the requirements
Poor packaging reliability
JB/T 51065-1999
Sampling plan
Minor defects
Defect classification
Number of items
Inspection level
Sample size code
Sample size n
Qualified products
Superior products
People's Republic of China
Mechanical industry standard
Milk separator product quality classification
(Internal use)
JB/T510651999
Published by the Mechanical Science Research Institute Printed by the China Academy of Mechanical Science (No. 2, Shouti South Road, Beijing, zip code 100044)) Format 880X1230 1/16 Printing sheet 3/4 Word count 14000 First edition April 2000 First printing April 2000 Price 15.00 Yuan Printing quantity 1-5000 Number 99-1376 Mechanical Industry Standard Service Network: http://www.jb.ac.cn666190/12
No leakage
No secondary residual deformation
Electric type: ≤85
Qualified products
Hand-cranked type: ≤70
Not greater than the design value
Not less than the design value
Inspection of cracks in the base of the separation bowl
Inspection of cracks in the cover of the separation bowl
Total working life
50~100L
500~1000L
Life of the first overhaul
600hReliability in use
Fault-free operation time
Leakage of milk basin
Number of separation pieces
Edge gap of separation pieces
Separator operation||tt| |Sealing of transmission case
Safety device
Rust prevention inspection
50~100L
50-100L
200~500L
50-100L
200-1000L
Surface quality of stamping parts
Painting quality
Integrity of the whole machine
100-1000L/h Mutual positioning measures of separation bowl parts
Packaging reliability
JB/T51065-1999
Table 1 (end)
Quality grading index
Superior product
≥ 3300
≥ 5500
≥13000
≥1400
≥2300
≥ 4500
≤ 20
No cracks
No cracks
≥3200
≥5300
≥12000
≥1300
≥2200
≥4200
Design value
Qualified products
≥ 3000
≥ 5000
≥10000
≥1200
≥2000
≥4000
No collision, jamming or other abnormal phenomena
Flexible rotation,
No leakage
After adjustment
No leakage
After adjustment
Slight leakage| |tt||1. Rotating parts should have reliable protective covers; 2. Wires should be heat-insulated,
without cracks, burrs, sharp edges and obvious
wrinkles,
waterproof,
well-insulated
without obvious
scratches, burrs, sharp
edges and wrinkles,
with cracks
in compliance with JB TQ-2-1-DM in T5673 shall not have serious scratches, wrinkles, burrs, sharp edges, and shall not have cracks. TQ-2-2-DM in JB/T5673 shall comply with the accessories, attachments, and random documents. The whole machine shall not be missing any parts and shall comply with JB/T7767.1 regulations
Vertical shaft gear fixed chord teeth
Thick wear 70%
Copper gear fixed chord teeth of one station
Thick wear 70%
Measure the leakage volume for 5 minutes
The sum of the arc lengths of a group of separator contact parts
shall not be greater than
1% of the circumference of a separator
1. Any contact with milk 2. Separation bowl and device parts
Any part not in contact with milk
is allowed to have rust spots with a diameter not exceeding
2mm
Including the installation position number between the separation pieces
JB/T51065-1999
Defect classification and grouping
The volume ratio of milk fat to skim milk is insufficient
The sealing of the separation bowl does not meet the requirements
600h service reliability does not meet the requirements
The fat content of skim milk is out of tolerance
The dynamic balance of the separation bowl is out of tolerance
The comprehensive deviation of spring stiffness is out of tolerance
The base of the separation bowl is cracked
Insufficient trouble-free operation time
The cover of the separation bowl is cracked
Strength test is not enough
Electricity output is insufficient
Amplitude exceeds tolerance
Noise exceeds tolerance
Productivity is insufficient
Life at the first overhaul is insufficient
Uneven gap between the edges of the separator
Total working life is insufficient
The sealing of the transmission box does not meet the requirements
The number of separators does not meet the requirements
The weight of the whole machine exceeds tolerance
Milk basin leakage exceeds tolerance
The surface quality of stamping parts does not meet the requirements
Unstable operation of the separator
Safety device does not meet the requirements
Rust-proof inspection is unqualified
100-1000L/h Separation bowl parts have insufficient mutual positioning measures. Paint quality inspection does not meet the requirements
The integrity of the whole machine does not meet the requirements
Poor packaging reliability
JB/T 51065-1999
Sampling plan
Minor defects
Defect classification
Number of items
Inspection level
Sample size code
Sample size n
Qualified products
Superior products
People's Republic of China
Mechanical industry standard
Milk separator product quality classification
(Internal use)
JB/T510651999
Published by the Mechanical Science Research Institute Printed by the China Academy of Mechanical Science (No. 2, Shouti South Road, Beijing, zip code 100044)) Format 880X1230 1/16 Printing sheet 3/4 Word count 14000 First edition April 2000 First printing April 2000 Price 15.00 Yuan Printing quantity 1-5000 Number 99-1376 Mechanical Industry Standard Service Network: http://www.jb.ac.cn666190/12
No leakage
No secondary residual deformation
Electric type: ≤85
Qualified products
Hand-cranked type: ≤70
Not greater than the design value
Not less than the design value
Inspection of cracks in the base of the separation bowl
Inspection of cracks in the cover of the separation bowl
Total working life
50~100L
500~1000L
Life of the first overhaul
600hReliability in use
Fault-free operation time
Leakage of milk basin
Number of separation pieces
Edge gap of separation pieces
Separator operation||tt| |Sealing of transmission case
Safety device
Rust prevention inspection
50~100L
50-100L
200~500L
50-100L
200-1000L
Surface quality of stamping parts
Painting quality
Integrity of the whole machine
100-1000L/h Mutual positioning measures of separation bowl parts
Packaging reliability
JB/T51065-1999
Table 1 (end)
Quality grading index
Superior product
≥ 3300
≥ 5500
≥13000
≥1400
≥2300
≥ 4500
≤ 20
No cracks
No cracks
≥3200
≥5300
≥12000
≥1300
≥2200
≥4200
Design value
Qualified products
≥ 3000
≥ 5000
≥10000
≥1200
≥2000
≥4000
No collision, jamming or other abnormal phenomena
Flexible rotation,
No leakage
After adjustment
No leakage
After adjustment
Slight leakage| |tt||1. Rotating parts should have reliable protective covers; 2. Wires should be heat-insulated,
without cracks, burrs, sharp edges and obvious
wrinkles,
waterproof,
well-insulated
without obvious
scratches, burrs, sharp
edges and wrinkles,
with cracks
in compliance with JB TQ-2-1-DM in T5673 shall not have serious scratches, wrinkles, burrs, sharp edges, and shall not have cracks. TQ-2-2-DM in JB/T5673 shall comply with the accessories, attachments, and random documents. The whole machine shall not be missing any parts and shall comply with JB/T7767.1 regulations
Vertical shaft gear fixed chord teeth
Thick wear 70%
Copper gear fixed chord teeth of one station
Thick wear 70%
Measure the leakage volume for 5 minutes
The sum of the arc lengths of a group of separator contact parts
shall not be greater than
1% of the circumference of a separator
1. Any contact with milk 2. Separation bowl and device parts
Any part not in contact with milk
is allowed to have rust spots with a diameter not exceeding
2mm
Including the installation position number between the separation pieces
JB/T51065-1999
Defect classification and grouping
The volume ratio of milk fat to skim milk is insufficient
The sealing of the separation bowl does not meet the requirements
600h service reliability does not meet the requirements
The fat content of skim milk is out of tolerance
The dynamic balance of the separation bowl is out of tolerance
The comprehensive deviation of spring stiffness is out of tolerance
The base of the separation bowl is cracked
Insufficient trouble-free operation time
The cover of the separation bowl is cracked
Strength test is not enough
Electricity output is insufficient
Amplitude exceeds tolerance
Noise exceeds tolerance
Productivity is insufficient
Life at the first overhaul is insufficient
Uneven gap between the edges of the separator
Total working life is insufficient
The sealing of the transmission box does not meet the requirements
The number of separators does not meet the requirements
The weight of the whole machine exceeds tolerance
Milk basin leakage exceeds tolerance
The surface quality of stamping parts does not meet the requirements
Unstable operation of the separator
Safety device does not meet the requirements
Rust-proof inspection is unqualified
100-1000L/h Separation bowl parts have insufficient mutual positioning measures. Paint quality inspection does not meet the requirements
The integrity of the whole machine does not meet the requirements
Poor packaging reliability
JB/T 51065-1999
Sampling plan
Minor defects
Defect classification
Number of items
Inspection level
Sample size code
Sample size n
Qualified products
Superior products
People's Republic of China
Mechanical industry standard
Milk separator product quality classification
(Internal use)
JB/T510651999
Published by the Mechanical Science Research Institute Printed by the China Academy of Mechanical Science (No. 2, Shouti South Road, Beijing, zip code 100044)) Format 880X1230 1/16 Printing sheet 3/4 Word count 14000 First edition April 2000 First printing April 2000 Price 15.00 Yuan Printing quantity 1-5000 Number 99-1376 Mechanical Industry Standard Service Network: http://www.jb.ac.cn666190/Separation bowl and device parts
For any part not in contact with milk,
rust spots with a diameter not exceeding
2mm are allowed
including the installation position number between the separation pieces
JB/T51065-1999
Defect classification and grouping
The volume ratio of milk fat to skim milk is insufficient
The sealing of the separation bowl does not meet the requirements
600h service reliability does not meet the requirements
The fat content of skim milk is out of tolerance
The dynamic balance of the separation bowl is out of tolerance
The comprehensive deviation of spring stiffness is out of tolerance
The base of the separation bowl has cracks
Insufficient trouble-free operation time
The cover of the separation bowl has cracks
Insufficient strength test
Insufficient kilowatt-hour output
Amplitude exceeds tolerance
Noise exceeds tolerance
Insufficient productivity
Insufficient life at the first overhaul
Uneven gap between the edges of the separator
Insufficient total working life
The sealing of the transmission box does not meet the requirements
The number of separators does not meet the requirements
The weight of the whole machine exceeds tolerance
Milk basin leakage exceeds tolerance
The surface quality of the stamping parts does not meet the requirements
Unstable operation of the separator
Safety device does not meet the requirements
Rust-proof inspection fails
100-1000L/h separation bowl parts have insufficient mutual positioning measures. Paint quality inspection does not meet the requirements
The integrity of the whole machine does not meet the requirements
Poor packaging reliability
JB/T 51065-1999
Sampling plan
Minor defects
Defect classification
Number of items
Inspection level
Sample size code
Sample size n
Qualified products
Superior products
People's Republic of China
Mechanical industry standard
Milk separator product quality classification
(Internal use)
JB/T510651999
Published by the Mechanical Science Research Institute Printed by the China Academy of Mechanical Science (No. 2, Shouti South Road, Beijing, zip code 100044)) Format 880X1230 1/16 Printing sheet 3/4 Word count 14000 First edition April 2000 First printing April 2000 Price 15.00 Yuan Printing quantity 1-5000 Number 99-1376 Mechanical Industry Standard Service Network: http://www.jb.ac.cn666190/Separation bowl and device parts
For any part not in contact with milk,
rust spots with a diameter not exceeding
2mm are allowed
including the installation position number between the separation pieces
JB/T51065-1999
Defect classification and grouping
The volume ratio of milk fat to skim milk is insufficient
The sealing of the separation bowl does not meet the requirements
600h service reliability does not meet the requirements
The fat content of skim milk is out of tolerance
The dynamic balance of the separation bowl is out of tolerance
The comprehensive deviation of spring stiffness is out of tolerance
The base of the separation bowl has cracks
Insufficient trouble-free operation time
The cover of the separation bowl has cracks
Insufficient strength test
Insufficient kilowatt-hour output
Amplitude exceeds tolerance
Noise exceeds tolerance
Insufficient productivity
Insufficient life at the first overhaul
Uneven gap between the edges of the separator
Insufficient total working life
The sealing of the transmission box does not meet the requirements
The number of separators does not meet the requirements
The weight of the whole machine exceeds tolerance
Milk basin leakage exceeds tolerance
The surface quality of the stamping parts does not meet the requirements
Unstable operation of the separator
Safety device does not meet the requirements
Rust-proof inspection fails
100-1000L/h separation bowl parts have insufficient mutual positioning measures. Paint quality inspection does not meet the requirements
The integrity of the whole machine does not meet the requirements
Poor packaging reliability
JB/T 51065-1999
Sampling plan
Minor defects
Defect classification
Number of items
Inspection level
Sample size code
Sample size n
Qualified products
Superior products
People's Republic of China
Mechanical industry standard
Milk separator product quality classification
(Internal use)
JB/T510651999
Published by the Mechanical Science Research Institute Printed by the China Academy of Mechanical Science (No. 2, Shouti South Road, Beijing, zip code 100044)) Format 880X1230 1/16 Printing sheet 3/4 Word count 14000 First edition April 2000 First printing April 2000 Price 15.00 Yuan Printing quantity 1-5000 Number 99-1376 Mechanical Industry Standard Service Network: http://www.jb.ac.cn666190/
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