Some standard content:
GB/T5779.22000
This standard is equivalent to the international standard TS 61.17-2:1995 Fastener surface defects Part 2.
This standard is a revised version of GBT5779.2.1986, with the following major revisions: a) Add the definition of applicable fine teeth (1.1); h) Add the definition of "clip cracking" and adjust the allowable limit of "forged cracking" (3.2); c) Adjust the allowable limit of locking part cracking (3.1.3); d) Separately define "burst" and "shear burst" and adjust the allowable limits (3.2 and 3.3); e) Cancel the term "stripe mark" and adjust the allowable limits of "crack" (3, 4); ) Adjust the allowable limit of "crack mark" (3.6); g) Add the requirement of 1(0%) If the full inspection is required, it should be indicated in the order, \ (4.2); h) provisions \ according to GB/T3098.11 Liu Jie mother to carry out the hole expansion test \ for the inspection of the 4.4) t13 reference GB/T3098.12 and GB/T3098.11 (4.a), this standard will replace GB/T5779.21986 from the date of implementation.
This standard is proposed by the National Machinery Industry.
This standard is under the jurisdiction of the National Technical Committee for Standardization of Fasteners. This standard was drafted by the Mechanical Science Research Institute. This standard is interpreted by the Secretariat of the National Technical Committee for Standardization of Fasteners. 38n
GB/T 5779.2
ISO (International Organization for Standardization) is a worldwide association of national standards bodies (ISO member bodies). The preparation of International Standards is usually carried out through technical committees of ISO. Each member body may participate in the work of a technical committee if it has an interest in the work of that committee. International organizations, governmental and non-governmental, related to ISO may also participate in this work. ISO has close links with the International Electrotechnical Commission (IEC) in the field of electrotechnical standardization. Proposals for International Standards adopted by the technical committees are circulated to all member bodies for voting. Formal adoption of an International Standard requires a vote of at least 5 % of the total votes cast by the member bodies.
International Standards ISO 6137-2 is formulated by the IS>/TC2 Fastener Technical Committee S(1 Fastener Mechanical Properties Subcommittee. Surface defects are light", including small parts;
IS06157 is generally called "Fastening parts,
-Part 1: Bolts, screws and spiders H
-Part 2: Exhaust Yue
Part 3: Bolts, screws and butterfly cabinets
General requirements
Special requirements
1 Scope
People's Republic of China National Standard of China
Fastenerg-SurfaccdisrantinuiliesNuts1.1 The limits specified in this standard apply to various surface defects of nuts: Applicable frequency mother:
Effective nominal diameter of nuts is 5~39mmF
GB/T5779.22000
idt18o6157-7.1995
Generator G8/T 739.2-. 1926
Product Grade A and R:
Comply with all performance levels specified in GB/T8098.2 and GB/T3:95.1. Exceptions are made when there are other provisions in the product standard or when the supplier has reached a special agreement between the two parties:
1.2 Even if the surface defects reach the allowable limit specified in Section 3, the mechanical and working performance of the product shall meet the minimum requirements specified in GB/T 3198.2, GB/T 311J8.4 and GB/T 309R.9. In addition, it shall also meet the size requirements of the corresponding product standards. Notes
1 The graphic representations in Section 3 are examples and are also applicable to other types of fuel. 2 For the sake of clarity, some surface defects are shown in the attached figure. 2 Referenced Standards
The provisions included in the following standards constitute the provisions of this standard through their use in this standard. The versions shown are valid when this standard is released. All standards will be adjusted accordingly. All parties using this standard may use the latest version of the following standards. GB/T 90-1985 Fastener acceptance inspection, packaging (v19D 3263:1584) Surface properties parameters and their values (mem1S0) (468:1982) G13/T103:1995
GB/T 3098.2-2000 Fastener mechanical properties LB/T 3898.4 200m
G3/T 3098.y-1993
GE/T 3098. 12—1996
GB/T3098.14.-2000
Mechanical properties of fasteners
Mechanical properties of fastenersWww.bzxZ.net
Mechanical properties of fasteners
Mechanical properties of fasteners
3 Types, origins, appearance characteristics and limits of surface defects 198992
0981994
Excitation electric steel hexagonal lock screws (): 1! Screw internal body shape guarantee load test (itt1S0 1G185;1991) Coal expansion test (IDT15) 10484:1997) 3.1 Cracks
type is a clear (solid) discontinuity along the metal grain boundary or across the grain, and may contain foreign elements. The cracks are formed by high stresses in the process of forging or other forming processes or heat treatment. The cracks may exist in the raw material. When the part is heated, it is usually stripped by oxygen and the cracks change color. National Quality and Technical Supervision Bureau 2000-09 26 approved a32
2001 02-01 implementation
3.1. Queach cracks
CB/r 5779. 2- 2000
In the heat treatment, the high ideal should be sought, all companies can produce evaluation data to say that the fire science seam is close to the dragon, the large-scale half-gram direction of the positive car course Yang Yimian Luo Jing Chun fire dragonfly
Fire double seam
Inside the single economic fire weapon
【Effective some accurate difficult to develop environment】
Let the example source degree, any length of the economic fire chain of any department check is not dangerous to store Forging crucks urd inelusion tracks forging class and to control the chain
Xu fire chain
itch fire green road
fake health can be produced in the cutting material absorption manufacturing process, and the top or bottom surface of the pregnancy, or the pre-(bottom) and the opposite side of the flat joint fire bay science and technology in the original tree material inherent non-metallic clamping activity and raised in the medical Thai medical paper
the beauty of the finishing experience
the position of the worker to help the mother car flat surface know the top hundred" number of light + should respectively meet the requirements of the feeling of the whole) to wear the supporting surface of the service into be careful not to be like The depth of the two bearings shall not exceed 0, 1) the cracks in the extension body shall not exceed the first dose of the filling screw effect: c) the depth of the first buckle shall not exceed the actual service business. H.-95112,
Austrian nominal diameter
In the item or
solution
CB/T5779.22000
3.1.3 All-metal effective torch-type locking screw with partial crack prevention rrque type nuls
Crarkx in ile harkmg elrmenr sf alf-nsetal all the remaining effective force type locking pregnant mother's Xie tightening depression division, may (cutting or sleeping or closing (and bureau) process production, and pregnant with a section of the outer Hao in the surface work
inner inflammation surface sleep
production and parts of the lock part of the female chain, should be able to meet the requirements of the machine penetration and working performance, but also must meet the) try the neck part of the shape of the health should not be more than two, the total depth should not exceed LJ extension to the hole inside the object should not exceed the first buckle complete shooting, the first buckle on the glandular pattern should not be twisted more than 0.51 by the closing (> the position of the tightening part of the chain should not be allowed. Source nominal diameter H.-
see 3.1.2
3.1.4: The washer retainer of nuts with caiptive wugherg is the crack of the metal edge or protrusion in the process of fixing the washer on the nut. In the process of matching, when pressure is applied to the edge or protrusion, the washer may crack. The whole seat collar should be within the edge or protrusion after riveting, and the seat should be able to rotate freely without falling off. 3.2 Shearbursts Shear bursting is the crack of the metal surface. GB/T 5779.2-2000 Shear bursting may occur in the process of cutting, such as on the outer surface of the nut or on the periphery of the plate. Usually the shear crack of the nut axis is about 45°
shear explosion
shear on the opposite side of the screw should not extend to the maximum support, or the quality of the mother round. For the shear selection, the angle of the bottom skin is reduced to the minimum size of the mother top and the width of the shear melt at the intersection of the opposite side plane shall not be greater than (0.250.u2)m. The crack on the flange frequency tooth shall not extend to the minimum size of the support surface and shall not exceed the width of the inch. ay ef, :
Burats
are cracks on the metal surface.
During the forging process, the surface defects of the original material can cause cracks, such as on the outer surface of the screw or on the two sides of the flange nut
If the effect caused by the original material is connected with the crack, the effect can extend to the two parts of the material 3.1) but it is not good to extend to the screw on the workpiece. The width of the angle should not be too small. The minimum size of the lower frequency parameter material or the bottom surface of the nut should not be greater than (c.251.02:). The flange and the nut should not extend to the bearing surface diameter (.) The minimum size flash, and its use should not exceed 0. GRdr.
On the edge:
Dalan white
3.4 Seams
GB/T 5779.22000
Cracks are surface defects formed by narrow cracks on the material. The original round
Double effect Dihuo is the inherent defect rate in the raw materials of fasteners. The depth of the single thread does not exceed the standard of the market. 5: Xie Jing self
Wrinkle effect span in the forging process, the surface of the nut will be broken
In the explanation of the nut, the father of the change of the convex diameter (country) is close to the The child's place, or the medical hundred or bottom of the screw, the material of the position of the recommendation can produce dust Hua effect
item surface now on the surface of the effective
side of the defect
inquiry two positive chain dependence
located at the flange surface standard mother's legal benefit medical solid and support requirements and the need for effective tension, people get to the point rate south. Its acceptance is allowed in 3.6 concave swallow Voidr
GB/T5779.2-2000
called pregnancy is said to cause sensitive Xie process , the shallow marks or depressions on the surface of the nut that are not filled with F metal are caused by the shearing of the raw materials or the reduction of the raw materials. They can be eliminated by technology in general manufacturing or production processes. The depth and width of the depressions are 69.02 mm and the maximum area is 0.10 m. The total surface area is 5 mm for the nominal diameter of the nut. The support space is 5 mm. 10% of the science, attached to this public 4mm, vibration teaching nominal point diameter
toolmarks
cut marks are shallow evenly pasted in the longitudinal or withering direction, flow selection
cut marks refer to the solid system clear [1, the relative recognition between the parts and the Liu
for example
gum mother support recording surface with marks, the surface roughness should not be more than = 3.2um according to GHT103: provisions. Other beautiful retreat points are allowed in
3. 8 Damage Dainag
Damage refers to the scratches on the surface of the product, such as scratches, notches and bacteria, which are caused by external influences during the production process, and the product has a different shape, position or time, and cannot be identified by external factors. The above-mentioned damage cannot prove the performance and usability of the product, otherwise it will be rejected. If necessary, special arrangements can be made, such as the requirements of the package, to avoid damage inspection and judgment procedures in the description
The following procedures should be used in accordance with the relevant provisions of GB/T 90. 4.1 Routine acceptance inspection
Routine acceptance inspection should adopt a standard inspection procedure to ensure that the product meets the requirements of this standard. 4. Non-destructive inspection
According to the specification of GF/T90, samples are taken from the acceptance batch and can be put into 10 times for monthly test or other non-destructive inspection, such as magnetic technology or eddy current. If the defective samples do not exceed the limit of the charge, the batch of products is accepted. If the user requires a full inspection, it should be indicated in the order.
4.3 Destructive inspection
After removing the surface image and coating, if surface defects that may exceed the allowable limit are found, the samples with the most serious surface defects should be selected for destructive testing (CB/T3098.12 and GB/T3098, 14). 4.4 Arbitration test
For the arbitral inspection of the mother made of free-cutting steel, the hole expansion test should be carried out on the screw according to CB/T 3098.11. According to the agreement between the supplier and the belt, the aging test can be carried out according to GB/T3098.12. 4.5 Determination
If during the daily inspection, cracks exceeding the limit or cracks exceeding the limit of size are found, the batch of products shall be rejected.
If any sample fails to pass the destructive test carried out in accordance with 4.3 and 4.4, the batch of products shall be rejected. 38a2-2000
is a shallow hole or depression on the surface of the nut that is not filled with F metal during the manufacturing process. The source of the mark is due to the mark or size of the induced layer of the material being reduced by the same or shearing, and it can be eliminated in the general manufacturing or processing process. The depth and width of the dent are
69.02 meters per meter and the maximum area is 0.10m
. The total area of the nut is 5 meters. The nominal diameter of the screw is 21m, the support is 10%, the attachment is 4mm, the nominal diameter is 4mm, the toolmarks are the longitudinal or shallow uniform, flow selection, cutting, and solid clear [1, the relative movement between the parts and the surface of the mother support is the surface roughness should not exceed 3.2um according to GHT103:. Other marks are allowed in 3. 8 Damage Dainag
Damage refers to the scratches on the surface of the product, such as scratches, notches and bacteria, which are caused by external influences during the production process, and the product has a different shape, position or time, and cannot be identified by external factors. The above-mentioned damage cannot prove the performance and usability of the product, otherwise it will be rejected. If necessary, special arrangements can be made, such as the requirements of the package, to avoid damage inspection and judgment procedures in the description
The following procedures should be used in accordance with the relevant provisions of GB/T 90. 4.1 Routine acceptance inspection
Routine acceptance inspection should adopt a standard inspection procedure to ensure that the product meets the requirements of this standard. 4. Non-destructive inspection
According to the specification of GF/T90, samples are taken from the acceptance batch and can be put into 10 times for monthly test or other non-destructive inspection, such as magnetic technology or eddy current. If the defective samples do not exceed the limit of the charge, the batch of products is accepted. If the user requires a full inspection, it should be indicated in the order.
4.3 Destructive inspection
After removing the surface image and coating, if surface defects that may exceed the allowable limit are found, the samples with the most serious surface defects should be selected for destructive testing (CB/T3098.12 and GB/T3098, 14). 4.4 Arbitration test
For the arbitral inspection of the mother made of free-cutting steel, the hole expansion test should be carried out on the screw according to CB/T 3098.11. According to the agreement between the supplier and the belt, the aging test can be carried out according to GB/T3098.12. 4.5 Determination
If during the daily inspection, cracks exceeding the limit or cracks exceeding the limit of size are found, the batch of products shall be rejected.
If any sample fails to pass the destructive test carried out in accordance with 4.3 and 4.4, the batch of products shall be rejected. 38a2-2000
is a shallow hole or depression on the surface of the nut that is not filled with F metal during the manufacturing process. The source of the mark is due to the mark or size of the induced layer of the material being reduced by the same or shearing, and it can be eliminated in the general manufacturing or processing process. The depth and width of the dent are
69.02 meters per meter and the maximum area is 0.10m
. The total area of the nut is 5 meters. The nominal diameter of the screw is 21m, the support is 10%, the attachment is 4mm, the nominal diameter is 4mm, the toolmarks are the longitudinal or shallow uniform, flow selection, cutting, and solid clear [1, the relative movement between the parts and the surface of the mother support is the surface roughness should not exceed 3.2um according to GHT103:. Other marks are allowed in 3. 8 Damage Dainag
Damage refers to the scratches on the surface of the product, such as scratches, notches and bacteria, which are caused by external influences during the production process, and the product has a different shape, position or time, and cannot be identified by external factors. The above-mentioned damage cannot prove the performance and usability of the product, otherwise it will be rejected. If necessary, special arrangements can be made, such as the requirements of the package, to avoid damage inspection and judgment procedures in the description
The following procedures should be used in accordance with the relevant provisions of GB/T 90. 4.1 Routine acceptance inspection
Routine acceptance inspection should adopt a standard inspection procedure to ensure that the product meets the requirements of this standard. 4. Non-destructive inspection
According to the specification of GF/T90, samples are taken from the acceptance batch and can be put into 10 times for monthly test or other non-destructive inspection, such as magnetic technology or eddy current. If the defective samples do not exceed the limit of the charge, the batch of products is accepted. If the user requires a full inspection, it should be indicated in the order.
4.3 Destructive inspection
After removing the surface image and coating, if surface defects that may exceed the allowable limit are found, the samples with the most serious surface defects should be selected for destructive testing (CB/T3098.12 and GB/T3098, 14). 4.4 Arbitration test
For the arbitral inspection of the mother made of free-cutting steel, the hole expansion test should be carried out on the screw according to CB/T 3098.11. According to the agreement between the supplier and the belt, the aging test can be carried out according to GB/T3098.12. 4.5 Determination
If during the daily inspection, cracks exceeding the limit or cracks exceeding the limit of size are found, the batch of products shall be rejected.
If any sample fails to pass the destructive test carried out in accordance with 4.3 and 4.4, the batch of products shall be rejected. 38a
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