JB/T 1828.2-1999 Technical requirements for blades for shearing machines
Some standard content:
ICS25.120.10
Machinery Industry Standard of the People's Republic of China
JB/T1828.2-1999
Blades for Shearing Machines
Published on 1999-05-14
Technical Conditions
Implemented on 2000-01-01
National Bureau of Machinery Industry
JB/T18282—1999
This standard is a revision of ZBJ6201287 "Technical Conditions for Shearing Machine Blades". The technical content of this standard is basically consistent with that of ZBJ6201287, and it has only been re-edited according to relevant regulations. This standard shall be implemented from January 1, 2000
This standard shall replace ZBJ62012287 from the date of implementation
Appendix A of this standard is a prompt appendix.
This standard is proposed and managed by the National Technical Committee for Standardization of Forging Machinery. The main drafting unit of this standard is Shanghai Punching and Shearing Machine Tool Factory. The participating drafting units of this standard are Shenyang Forging Machine Tool Factory, Huangshi Forging Machine Tool Factory, Shanghai Mechanical Blade Factory, and Beijing Forging Machine Tool Factory. The main drafters of this standard are Li Deming, Lin Hong, Ge Zongliang, etc. This standard was first issued in April 1987.
1 Scope
Machinery Industry Standard of the People's Republic of China
Technical Conditions
Blades for Shearing Machines:
This standard specifies the technical requirements, test methods and inspection rules for blades for shearing machines. This standard applies to blades for shearing machines for general purposes (hereinafter referred to as blades). 2 Reference standards
JB/T1828.2-1999
Replaces ZBJ62012-87
The following standards contain provisions that 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 the parties using this standard should explore the possibility of using the latest versions of the following standards. GB191—1991
GB/T 2301991
GB/T1172——1974
GB/T11841996
GB/T1802—1979
JB/T1828.1—1999
JB/T18291997
JB/T8356.1—1996
3 Technical requirements
Packaging storage and transportation pictorial marking
Metal Rockwell hardness test method
Ferrous metal hardness and Strength conversion value
Shape and position tolerancesUnmarked tolerance values
Tolerance and fit dimensions greater than 500 to 3150 mm Common hole and shaft tolerance bands Blade types and basic parameters for shearing machines
General technical conditions for forging machinery
Technical conditions for machine tool packaging
3.1 The blades shall comply with the requirements of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. 3.2 Blade materials
3.2.1 The blades shall be selected according to the shearing working conditions and shearing objects. The following commonly used materials are recommended: 9CrSi, 5CrW2Si, 6CrW2Si, CrWMn, Cr12, Crl2MoV, etc. 3.2.2 The chemical composition and mechanical properties of the materials shall comply with the provisions of the relevant standards. 3.3 Blade heat treatment
3.3.1 The blade should be heat treated, and its hardness is as follows: a) 55~60HRC when the thickness of the shearable plate is less than or equal to 25mm; b) 52-57HRC when the thickness of the shearable plate is greater than 25mm3.3.2 The hardness of the blade should be uniform, and the hardness difference of the same blade should not be greater than 4HRC. 3.3.3 The metallographic structure of the blade after heat treatment should comply with the provisions of relevant standards. 3.4 Blade machining
3.4.1 Blade dimensional tolerance
3.4.1.1 The main dimensional tolerances of the full-length blade (see Figure 1 and Figure 2) should comply with the provisions of Table 1. Approved by the State Bureau of Machinery Industry on May 14, 1999 and implemented on January 1, 2000
Blade length
1100, 1300
1700, 2050
3300, 4100
JB/T1828.2—1999
The main dimensional tolerances of segmented blades (see Figure 1 and Figure 2) shall comply with the provisions of Table 2. Table 2
Blade length
1025, 1100, 1300
Note: The dimensional tolerances noted shall comply with the provisions of GBT1802b*
3.4.1.3 The dimensional tolerances and angle limit deviations not specified in this standard shall comply with the provisions of relevant standards, drawings and technical documents. 3.4.2 Blade shape and position tolerance
JB/T1828.2—1999
The main shape and position tolerance requirements of the whole-length blade are: 3.4.2.1
a) The perpendicularity tolerance of the two small blades to the same large blade surface is the 9th tolerance value in Table B3 of GB/T1184-1996: b) The equal thickness tolerance of the two large blade surfaces shall comply with the provisions of Table 3: Table 3
Blade length
1100,13001700,2050
33004100
c) The equal height tolerance of the two small blade surfaces is 0.10mmd) The straightness tolerance (longitudinal direction) of the large blade surface and small blade surface shall comply with the provisions of Table 4. Table 4
Straightness of large blade surface (long direction)
Blade length
1100, 1300
1700, 2050
3300.4100
1 on 1000 measuring length
3.4.2.2 Main geometric tolerance requirements of segmented blades: a) The straightness tolerance (long direction) of the small blade surface is 0.03mm:
Straightness of small blade surface (long direction)||t t||0.20 on a measuring length of 1000
b) The straightness tolerance (longitudinal direction) of the large blade surface is 0.30mm on a measuring length of 1000mm; c) The equal thickness tolerance of the two large blade surfaces is 0.03mm; d) The equal height tolerance of the two small blade surfaces is 0.03mme) The perpendicularity tolerance of the two end faces to the same small blade surface is 0.03mm: f The perpendicularity tolerance of the two small blade surfaces to the same large blade surface is the 8th grade tolerance value in Table B3 of GB/T1184-1996. 3.4.2.3 The geometric tolerances not specified in this standard shall be in accordance with the provisions of the relevant standards or drawings and technical documents. 3.4.3 Surface roughness of the blade
3.4.3.1 The surface roughness requirements of the entire blade are: a) The maximum allowable value of the surface roughness R of the two small blade surfaces and the two large blade surfaces is 1.6μm; b) The maximum allowable value of the surface roughness R of the two end faces is 12.5μum. 3.4.3.2 Surface roughness requirements for segmented blades: a) The maximum allowable value of the surface roughness R of the two small blade faces and the two large blade faces is 1.6μm; b) The maximum allowable value of the surface roughness R of the two end faces is 3.2um. mm
JB/T1828.2—1999
3.4.3.3 The maximum allowable value of the surface roughness R not specified is 25um; the surface of the empty knife groove is allowed to be used without removing material or to maintain the original supply status
3.5 Others
3.5.1 The blade should not have burns, cracks, chipping and other defects that affect the performance, and the blade edge should be sharp. 3.5.2 The blade surface is smooth and should not have defects that affect the quality such as bumps and scratches, and must be demagnetized. 3.5.3 It is allowed to make process holes on the blade according to the requirements of the drawings or technical documents. 3.5.4 The blade edge is not allowed to be chamfered.
4 Test methods and inspection rules
4.1 The blade must be inspected and qualified by the quality inspection department of the manufacturer before it can leave the factory, and it must be accompanied by a product certificate. 4.2 The blade should be inspected for the following items at the manufacturer: a) Type and size inspection;
b) Heat treatment inspection:
c) Processing quality inspection;
d) Appearance quality inspection;
e) Performance test.
4.3 The type and size of the blade should comply with the provisions of JB/T1828.1. 4.4 Heat treatment inspection of the blade
4.4.1 Start from 25mm from the end face of the blade and inspect the hardness within 5mm from the edge. When the blade length is less than or equal to 2000mm, inspect the hardness at no less than three locations; when it is greater than 2000mm, inspect the hardness at no less than five locations, with no less than three points at each location. 4.4.2 The content and inspection method of heat treatment quality inspection should comply with the provisions of relevant standards. 4.4.3 Hardness testing is generally carried out with a Rockwell hardness tester in accordance with the provisions of GB/T230. If the Rockwell hardness tester cannot be used for testing, other hardness testers or equivalent test instruments may be used according to actual conditions. The results should be converted according to GB/T1172 and should comply with the provisions.
4.4.4 After the blade is heat treated, its surface should be observed with the naked eye or a low-power magnifying glass for cracks, burns and bruises, etc. If necessary, a flaw detector should be used for inspection.
4.4.5 The metallographic structure of the blade material used for the first time and the blade produced for the first time after the process is changed should be inspected. The metallographic structure of the blades produced in batches can be sampled regularly, and the results should comply with the relevant standards. 4.5 Processing quality inspection
4.5.1 Check each item according to the dimensional tolerance, form and position tolerance and surface roughness requirements specified in the drawings and technical documents. 4.5.2 The inspection methods for the main dimensional tolerance and form and position tolerance of the blade shall be in accordance with the provisions of Table 5. 4
Inspection items
Blade length
Blade height
Blade thickness
Blade edge angle
Blade uniform thickness
(uniform height)
Blade straightness
JB/T1828.2—1999
Inspection method
Use a vernier caliper (steel ruler or steel tape measure) to measure at the upper and lower positions of the blade height direction, and use its maximum reading value as a sub-ruler to measure the distance between the two small blade surfaces. Use its maximum reading value to measure the distance between the two large blade surfaces with a micrometer, and use its maximum reading value to measure the angle between the large blade surface and the small blade surface multiple times along the length direction of the blade with a universal angle ruler, and use its maximum reading value to measurebzxz.net
Use a micrometer to measure the dimensions of the corresponding positions of the two parallel planes of the blade, and use its maximum reading difference to measure
Put the blade on a flat plate (or inspection flat ruler), use a feeler gauge to measure the gap, and use its maximum reading value to measure
4.5.3 The detection methods of dimensional tolerances and form and position tolerances not specified in this standard shall comply with relevant regulations. 4.5.4 The detection methods of surface roughness shall comply with relevant regulations. 4.6 Appearance quality inspection
The blade surface should not have defects that affect quality, such as pitting, rust, bumps and scratches. 4.7 Performance test
Inspection tools
Vernier caliper
Steel ruler
Steel tape measure
Micrometer
Micrometer
Universal angle ruler
Micrometer
Inspection ruler
4.7.1 Load shear test shall be carried out for blade materials adopted for the first time or blades produced for the first time after process change. 4.7.2 After the test, the blade shall not have chipping, significant wear or curling. 4.8 When sampling blade quality, the number of samples shall comply with the provisions of relevant standards. 5 Marking, packaging, transportation and storage
5.1 When the blade leaves the factory, the manufacturer's name (or trademark), specifications and manufacturing year and month shall be printed on the appropriate position (except for the blades shipped randomly).
5.2 The blade surface must be cleaned and sealed to prevent rust according to the relevant provisions of JB/T1829 before packaging. 5.3 The blade packaging should comply with the relevant provisions of JB/T8356.1. The blade packaging box shipped with the machine must be fixed in the mainframe box to ensure that it does not move in any direction during transportation. 5.4 The following documents should be attached to the blade when it leaves the factory (except for the blade shipped with the mainframe): a) Instruction manual;
b) Certificate of conformity:
c) Packing list.
5.5 The markings on the packaging box generally include the following, but it is allowed to add or reduce certain marks according to specific circumstances (except for the packaging box of the blades shipped with the host):
a) Model and name:
b) Box size (length × width × height), mm5
c) Net weight and gross weight, kg;
d) Factory date;
e) Destination station (port) and receiving unit;
Departure station (port) and shipping unit;
g) Packing, storage and transportation instructions Marking
JB/T1828.2—1999
The marking on the box should be correct, neat, clear and durable. The packaging, storage and transportation instructions should comply with the provisions of GB191. 5.6
5.7 The blades should be kept in a ventilated, dry place without acid, alkali or corrosive gas, and should be strictly protected from rain and moisture. 6 Others
6.1 Under normal storage and transportation conditions, within six months from the date of shipment, if the blades are broken or chipped due to poor manufacturing quality, the manufacturer shall be responsible for repairing or replacing them free of charge.
If there are special requirements, the supply and demand parties can negotiate and supply randomly or order separately. 6.2
Terms of various parts of the blade
JB/T1828.2—1999
Appendix A
(Suggestive Appendix)
Related terms and terms of blade
length
height
JB/T1828.2—1999
(See ① in Figure Al and Figure A2)
thidkness
(See Figure Al and Figure A2)
hole distance (distance between holes)
end (end) hole distance
holespacing
（See Fig. A1, Fig. A2 ④）
(and）holespacing（See Fig. Al, Fig. A2 ③和③）hole, throughhole（See Fig. Al ③）ofteparhole（See Fig. Al ③）
countersink, counterisunk（See Fig. Al 中）hole, screwhole（See Fig. A2 中）
tapped
（See Fig. AI?）
keyslot, keyway, key-seat（See Fig. A3 中@）empty knife groove
small blade surface
Large blade surface
bladeslot (see Figure Al
surface (see Figure Al, Figure A2)
Surface
First and last hole distance
Nouns for blade classification
(see Figure Al, Figure A2 ③)
distance
(see Figure A1, Figure A2)
surface
between
full length blade
total length blade
A22 segmented blade
sedtion blade
last hole (see Figure A1, Figure A2 (②) first
Mechanical industry standard
Technical conditions for blades for shearing machines
JB/T18282-1999
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing: Postal Code 100044)*
Format 880×1230
Printing sheet 3/4
4Number of words 18000
First edition in September 1999
First printing in September 1999
Print number 1-500
Price 1000 yuan
99-523
6618284 The surface roughness test method shall comply with relevant regulations. 4.6 Appearance quality inspection
The blade surface shall not have pitting, rust, bumps and scratches and other defects that affect the quality. 4.7 Performance test
Inspection tools
Vernier caliper
Steel ruler
Steel tape measure
Micrometer
Micrometer
Universal angle ruler
Micrometer
Inspection flat ruler
4.7.1 Load shear test shall be carried out for blade materials used for the first time or blades produced for the first time after process change. 4.7.2 After the test, the blade shall not have chipping, significant wear and curling. 4.8 When sampling and inspecting the quality of blades, the number of sampling and inspection shall comply with the provisions of relevant standards. 5 Marking, packaging, transportation and storage
5.1 When the blade leaves the factory, the manufacturer's name (or trademark), specifications and manufacturing year and month should be printed on the appropriate position (except for the blade shipped with the machine).
5.2 The surface of the blade must be cleaned and sealed for rust prevention in accordance with the relevant provisions of JB/T1829 before packaging. 5.3 The packaging of the blade should comply with the relevant provisions of JB/T8356.1. The packaging box of the blade shipped with the machine must be fixed in the mainframe box to ensure that it does not move in any direction during transportation. 5.4 The following documents should be attached to the blade when it leaves the factory (except for the blade shipped with the machine): a) Instruction manual;
b) Certificate of conformity:
c) Packing list.
5.5 The markings on the packaging box generally include the following, but it is allowed to add or reduce certain marks according to specific circumstances (except for the packaging box of the blades shipped with the host):
a) Model and name:
b) Box size (length × width × height), mm5
c) Net weight and gross weight, kg;
d) Factory date;
e) Destination station (port) and receiving unit;
Departure station (port) and shipping unit;
g) Packing, storage and transportation instructions Marking
JB/T1828.2—1999
The marking on the box should be correct, neat, clear and durable. The packaging, storage and transportation instructions should comply with the provisions of GB191. 5.6
5.7 The blades should be kept in a ventilated, dry place without acid, alkali or corrosive gas, and should be strictly protected from rain and moisture. 6 Others
6.1 Under normal storage and transportation conditions, within six months from the date of shipment, if the blades are broken or chipped due to poor manufacturing quality, the manufacturer shall be responsible for repairing or replacing them free of charge.
If there are special requirements, the supply and demand parties can negotiate and supply randomly or order separately. 6.2
Terms of various parts of the blade
JB/T1828.2—1999
Appendix A
(Suggestive Appendix)
Related terms and terms of blade
length
height
JB/T1828.2—1999
(See ① in Figure Al and Figure A2)
thidkness
(See Figure Al and Figure A2)
hole distance (distance between holes)
end (end) hole distance
holespacing
（See Fig. A1, Fig. A2 ④）
(and）holespacing（See Fig. Al, Fig. A2 ③和③）hole, throughhole（See Fig. Al ③）ofteparhole（See Fig. Al ③）
countersink, counterisunk（See Fig. Al 中）hole, screwhole（See Fig. A2 中）
tapped
（See Fig. AI?）
keyslot, keyway, key-seat（See Fig. A3 中@）empty knife groove
small blade surface
Large blade surface
bladeslot (see Figure Al
surface (see Figure Al, Figure A2)
Surface
First and last hole distance
Nouns for blade classification
(see Figure Al, Figure A2 ③)
distance
(see Figure A1, Figure A2)
surface
between
full length blade
total length blade
A22 segmented blade
sedtion blade
last hole (see Figure A1, Figure A2 (②) first
Mechanical industry standard
Technical conditions for blades for shearing machines
JB/T18282-1999
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing: Postal Code 100044)*
Format 880×1230
Printing sheet 3/4
4Number of words 18000
First edition in September 1999
First printing in September 1999
Print number 1-500
Price 1000 yuan
99-523
6618284 The surface roughness test method shall comply with relevant regulations. 4.6 Appearance quality inspection
The blade surface shall not have pitting, rust, bumps and scratches and other defects that affect the quality. 4.7 Performance test
Inspection tools
Vernier caliper
Steel ruler
Steel tape measure
Micrometer
Micrometer
Universal angle ruler
Micrometer
Inspection flat ruler
4.7.1 Load shear test shall be carried out for blade materials used for the first time or blades produced for the first time after process change. 4.7.2 After the test, the blade shall not have chipping, significant wear and curling. 4.8 When sampling and inspecting the quality of blades, the number of sampling and inspection shall comply with the provisions of relevant standards. 5 Marking, packaging, transportation and storage
5.1 When the blade leaves the factory, the manufacturer's name (or trademark), specifications and manufacturing year and month should be printed on the appropriate position (except for the blade shipped with the machine).
5.2 The surface of the blade must be cleaned and sealed for rust prevention in accordance with the relevant provisions of JB/T1829 before packaging. 5.3 The packaging of the blade should comply with the relevant provisions of JB/T8356.1. The packaging box of the blade shipped with the machine must be fixed in the mainframe box to ensure that it does not move in any direction during transportation. 5.4 The following documents should be attached to the blade when it leaves the factory (except for the blade shipped with the machine): a) Instruction manual;
b) Certificate of conformity:
c) Packing list.
5.5 The markings on the packaging box generally include the following, but it is allowed to add or reduce certain marks according to specific circumstances (except for the packaging boxes of blades shipped with the host machine):
a) Model and name:
b) Box size (length × width × height), mm5
c) Net weight and gross weight, kg;
d) Factory date;
e) Destination station (port) and receiving unit;
Departure station (port) and shipping unit;
g) Packing, storage and transportation instructions Marking
JB/T1828.2—1999
The marking on the box should be correct, neat, clear and durable. The packaging, storage and transportation instructions should comply with the provisions of GB191. 5.6
5.7 The blades should be kept in a ventilated, dry place without acid, alkali or corrosive gas, and should be strictly protected from rain and moisture. 6 Others
6.1 Under normal storage and transportation conditions, within six months from the date of shipment, if the blades are broken or chipped due to poor manufacturing quality, the manufacturer shall be responsible for repairing or replacing them free of charge.
If there are special requirements, the supply and demand parties can negotiate and supply randomly or order separately. 6.2
Terms of various parts of the blade
JB/T1828.2—1999
Appendix A
(Suggestive Appendix)
Related terms and definitions of blade
length
height
JB/T1828.2—1999
(See ① in Figure Al and Figure A2)
thidkness
(See Figure Al and Figure A2)
hole distance (distance between holes)
end (end) hole distance
holespacing
（See Fig. A1, Fig. A2 ④）
(and）holespacing（See Fig. Al, Fig. A2 ③和③）hole, throughhole（See Fig. Al ③）ofteparhole（See Fig. Al ③）
countersink, counterisunk（See Fig. Al 中）hole, screwhole（See Fig. A2 中）
tapped
（See Fig. AI?）
keyslot, keyway, key-seat（See Fig. A3 中@）empty knife groove
small blade surface
Large blade surface
bladeslot (see Figure Al
surface (see Figure Al, Figure A2)
Surface
First and last hole distance
Nouns for blade classification
(see Figure Al, Figure A2 ③)
distance
(see Figure A1, Figure A2)
surface
between
full length blade
total length blade
A22 segmented blade
sedtion blade
last hole (see Figure A1, Figure A2 (②) first
Mechanical industry standard
Technical conditions for blades for shearing machines
JB/T18282-1999
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing: Postal Code 100044)*
Format 880×1230
Printing sheet 3/4
4Number of words 18000
First edition in September 1999
First printing in September 1999
Print number 1-500
Price 1000 yuan
99-523
6618282—1999
（See ① in Figure Al and A2）
（See ① in Figure Al and A2）
thidkness
（See ① in Figure Al and A2）
hole spacing (distance between holes)
end (end) hole spacing
holespacing
（See ④ in Figure A1 and A2）
(and)holespacing（See ③ and ③ in Figure Al and A2）hole, throughhole（See ③ in Figure Al）ofteparhole（See ④ in Figure A1 and A2） Al③)
countersink, counterisunk (see Figure Al)hole, screwhole (see Figure A2)
tapped
(see Figure AI?)
keyslot, keyway, key-seat (see Figure A3@)empty knife groove
small blade surface
large blade surface
bladeslot (see Figure Al
surface (see Figure Al, Figure A2)
Surface
Distance between first and last holes
Nouns for blade classification
(See Figure Al, Figure A2 in ③)
distance
(See Figure A1, Figure A2 in ③)
surface
between
full length blade
total length blade
A22 segmented blade
sedtion blade
last hole (See Figure Al, Figure A2 in ②)first
Mechanical industry standard
for shearing machine Technical conditions of blades
JB/T18282-1999
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing: Postal Code 100044)*
Format 880×1230
Printing sheet 3/4
4Number of words 18000
First edition in September 1999
First printing in September 1999
Print run 1-500
Price 1000 yuan
99-523
6618282—1999
（See ① in Figure Al and A2）
（See ① in Figure Al and A2）
thidkness
（See ① in Figure Al and A2）
hole spacing (distance between holes)
end (end) hole spacing
holespacing
（See ④ in Figure A1 and A2）
(and)holespacing（See ③ and ③ in Figure Al and A2）hole, throughhole（See ③ in Figure Al）ofteparhole（See ④ in Figure A1 and A2） Al③)
countersink, counterisunk (see Figure Al)hole, screwhole (see Figure A2)
tapped
(see Figure AI?)
keyslot, keyway, key-seat (see Figure A3@)empty tool slot
small blade surface
large blade surface
bladeslot (see Figure Al
surface (see Figure Al, Figure A2)
Surface
Distance between first and last holes
Nouns for blade classification
(See Figure Al, Figure A2 in ③)
distance
(See Figure A1, Figure A2 in ③)
surface
between
full length blade
total length blade
A22 segmented blade
sedtion blade
last hole (See Figure Al, Figure A2 in ②)first
Mechanical industry standard
for shearing machine Technical conditions of blades
JB/T18282-1999
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing: Postal Code 100044)*
Format 880×1230
Printing sheet 3/4
4Number of words 18000
First edition in September 1999
First printing in September 1999
Print run 1-500
Price 1000 yuan
99-523
661828
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