Some standard content:
QB/T2377—1998
This standard is proposed by the Industry Management Department of the State Bureau of Light Industry. This standard is under the jurisdiction of the National Sewing Machine Standardization Center.
The drafting units of this standard: Shanghai Xiechang Co., Ltd., Harbin Woodware Factory, Shanghai Sewing Machine Table Factory No. 5 The main drafters of this standard: Chen Jialian, Zhou San, Xu Ruijie, Su Yongfa. 405
1 Scope
Light Industry Industry Standard of the People's Republic of China
Household Sewing Machine
QB/T 2377—1998
This standard specifies the definition, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of household sewing machine tables. This standard applies to ordinary household sewing machine tables, cabinet tables and sewing machine suitcases (hereinafter referred to as "tables"). This standard does not apply to plastic and artificial leather sewing machine suitcases. 2 Reference 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 will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 19311991
GB/T 2828---1987
GB/T 2829---1987
GB/T 4514—1984
Method for determination of moisture content of wood
Count sampling procedure and sampling table for batch inspection (applicable to inspection of continuous batches)Count sampling procedure and sampling table for periodic inspection (applicable to inspection of stability of production process)Rules for compiling product models of sewing machines
GB/T 4893. 6-1985
GB/T 11718.7---1989
Method for determination of gloss of paint film on furniture surface
Determination of planar tensile strength of medium density fiberboardGB/T 16469—1996
Packaging of sewing machines
ZBY 17012—1985
3 Definitions
Technical conditions for blackening of sewing machine parts
This standard adopts the following definitions.
3.1 Names of products and parts
3.1.1 Thermosetting decorative sheets table Thermosetting decorative sheets table is a table with a layer of thermosetting resin decorative laminate bonded to the main surface. The names of its main parts are shown in Figure 1. Cover hinge
Bucket seat
Head hinge
Figure 1 Detailed drawing of parts of decorative board veneer table
Approved by the State Bureau of Light Industry on 1998-05~14
KAONKAca-
Implemented on 1999-03-01
QB/T 2377—1998
3.1.2 Wooden surface tablewooden surface table The main board is coated with transparent paint on the upper surface of the table, and the names of its main parts are shown in Figure 2. Main board
Machine cover
Head hinge
Figure 2 Detailed drawing of parts of wooden surface table
3.1.3 Wardrode type table A table composed of the main board and the lower cabinet frame. 3.1.4 Wooden hand covercase Flap
A portable case consisting of a case base and a case cover, the names of its main parts are shown in Figure 3. Case cover
Case cover
Machine head hinge
Machine pin
Machine pin seat
Figure 3 Detailed drawing of suitcase parts
3.2 Processing surface
3.2.1 Main surface
Main surface
The surface with transparent paint or decorative board veneer. 3.2.2 Minor surface
The surface with color.
3.2.3 Unnotceable surface The surface without color or paint.
3.3 Defects
3. 3. 1 Resin sag
Resiny sag.
Strip-shaped grooves in the wood, which contain or have contained resinous substances. 3.3.2 Rottenness
Rottenness
Small cover
Wood is invaded by decaying fungi, which decomposes the cell wall materials, resulting in the material becoming soft, the strength and density decreasing, and the wood structure and color also changing.
3.3.3 Crack
QB/T2377—1998
Cracks formed by the separation of wood fibers along the direction of the wood grain. 3.3.4 Gap
Gaps formed after the separation of wood fibers. 3.3.5 Warp
Generally regular deformation, with a curved surface. 4 Product classification
Categories and variety codes are shown in Table 1.
4.2 Model representation method
Household sewing machine table
Categories and variety codes
One-bucket platform
Two-bucket hidden platform
Three-bucket hidden platform
Three-bucket egg-folding table
Five-bucket hidden folding table
Desk-type table
Cabinet-type table
Suitcase
One-bucket folding table
Table model shall comply with the provisions of Chapter 4 of GB/T4514-1984 for the numbering of sewing machine parts. The code consists of Arabic numerals. 4.2.1 Order of code
Design sequence number
Variety code
Category code
Model example
5 Technical requirements
5.1 Structural dimensions
Each design
Two-bucket hidden platform
Household sewing machine table
-ri KAONi KAca-
Q8/T2377-1998
5.1.1 The hole size of the table head bottom plate shall comply with the provisions of Figure 4 and Table 2. 65±0.6
Note: For all circled holes of the head mat plate, the base angle radius (R) is 18mm. Figure 4 Main structural dimensions of the head bottom plate hole of the table Figure 2 Dimensions and tolerances of the head bottom plate hole of the table Type
Flat and cabinet table with broadcasting board
Double-folding table with rocking board
Table without rocking board
Basic dimensions
The external dimensions of the table shall comply with the provisions of Table 3. 5.1.2
Limit deviation
External dimensions and tolerances of the table
Length
Product code
Total width
Total height
Note: The main board thickness is 18mm, suitable for medium density fiberboard. Limit
Main pole degree
Basic size
Dense board thickness
Limit deviation
Board thickness
5.2 Wood quality
5.2.1 The moisture content of wood should not be greater than 18%. QB/T2377-1998
5.2.2 The wood on the main surface of the table board shall not have cracks, decay, or resin capsules. 5.2.3 Patches are not allowed on the main surface, and the materials in other parts shall not have defects that affect strength and appearance. 5.3 Appearance quality
5.3.1 General requirements
5.3.1.1 The color of the paint film on each main surface and secondary surface is basically the same. The paint film on each main surface should be flat and smooth, and obvious paint flow, peeling, peeling, cracking, brush marks, bubbles and obvious impurities are not allowed. 5.3.1.2 Defects
5.3.1.3 There should be no obvious stains on the secondary surface and non-exposed areas of the table. 5.3.1.4 The surface of the decorative board is not allowed to have obvious stains, dry and wet spots, indentations, small bubbles, cracks and uneven color. 5.3.1.5 The decal position should be correct, the pattern should be clear, and there should be no obvious glue marks, loose flowers, or broken flowers. 5.3.2 Requirements for the surface of metal accessories of the table
5.3.2.1 The surface of the electroplated parts should be free of rust, peeling, and bubbles. The main surface should not have obvious spots, pinholes, and burrs, and the color should be basically consistent. 5.3.2.2 The surface quality of blackened parts should comply with the provisions of 1.1 of ZBY17012-1985. 5.3.2.3 The surface of the painted parts should be flat and uniform in color. The main visible parts should not have obvious defects such as paint peeling, bubbling, paint flow, and paint scratches. 5.3.3 The heads of all exposed screws and nails should be flat and free of burrs. 5.4 Processing quality
5.4.1 Debonding is not allowed within 25mm of the surface and edge of the cover, seat, main board, and suitcase. The debonding area of other parts shall comply with the following regulations: a) The debonding area of the decorative board veneer table shall not exceed 900mm2 at each location, the front panel shall not exceed two locations, and the back panel shall not exceed three locations; b) The debonding area of the wooden surface table shall not exceed 400mm at each location, the front panel shall not exceed two locations, and the back panel shall not exceed three locations! c) The inner layer of the two ends of the suitcase chassis cover shall not exceed 200mm2 at each location, and shall not exceed two locations. 5.4.2 Debonding is not allowed at the gluing parts of each component. 5.4.3 The flatness tolerance value of the cover, seat, and main board surface within any -70mm length shall not exceed 0.3mm. 5.4.4 The flatness tolerance value of the cover, seat, and main board surface shall comply with the provisions of Table 4. Table 4 Flatness tolerance of table surface
Basic size L
>400～630
>630～1000
>1000～1600
Tolerance value
5.4.5 The veneer of decorative board shall be free of cracks, but fine cracks within 1.5mm width of cutting edge are allowed (should be repaired and sanded). Scraping is allowed at three places of 35mm.
5.4.6 The hardness of main surface paint film shall be free of obvious scratches after testing in accordance with 6.4.4. 5.4.7 Weather resistance shall meet the following requirements after testing in accordance with 6.4.5. a) The wood shall be free of cracks, peeling and warping that affect performance; b) The paint film surface shall not have defects such as damage to color, gloss and obvious peeling; c) Metal accessories shall not be rusty and shall not have defects that obviously affect performance. 5.5 Assembly quality
5.5.1 Wooden parts should be installed firmly, flat, and in the correct position without damage, and should be flexible to open and close. 5.5.2 Metal accessories should be installed firmly, in the correct position, and should be flexible to start. 5.5.3 Screws and steel nails should not be loose, pierced, exposed, bent, or missing after being fastened to parts. 410
HTKAoNiKAca
QB/T2377-1998
5.5.4 Locks should be installed in the correct position, and should be flexible and reliable to open and lock. 5.5.5 The bucket of the detachable table should be able to be assembled and should not be loose after installation. 5.6 Fitting accuracy
5.6.1 The fitting clearance between the cover plate and the base plate or the main plate shall not exceed 2mm. The fitting clearance between the base plate and the main plate shall not exceed 1mm. 5.6.2
5.6.3 The gap between the front and side cutouts of the flap should not be greater than 0.5mm. 5.6.4
The clearance between the tipping bucket, rocking bucket and the bottom of the main board should not be greater than 2mm. The clearance between the drawer and the bucket frame should not be greater than 2mm. 5.6.5
5.6.6 The clearance between the cabinet table door and the frame should not be greater than 2mm. 5.6.7 The clearance between the cover plate, the flap and the inner frame of the main board should not be greater than 1.4mm on average. 5.6.8 After the rocking plate and the seat plate or the main board are assembled, the two surfaces should be level, and the height error should not be greater than 5mm. The folding table is only allowed to be lower, and the side clearance should not be greater than 1.2mm.
5.6.9 After the hinges and components are assembled, they should be level, and should not be higher than the surface of the installation parts, but they can be lower than the surface, and the error should not be greater than 0.3mm. The allowable low error of the machine head hinge surface is no more than 0.25mm, and the folding table and suitcase are only allowed to be low. 5.6.10 After the hinge and components are assembled, the clearance between the edges of the hinge and the installed parts (including the decorative board veneer table) is no more than 0.5mm, and the wooden table and suitcase are no more than 0.3mm.
5.6.11 The matching of the chassis cover and the chassis seat should be correct, without obvious looseness, and the plane matching clearance is no more than 1.5mm. 5.7 The physical and mechanical properties of the table should comply with the provisions of Tailor 5. Table 5 Physical and mechanical properties of the table
Item name
Dry shear strength of the adhesive layer 1)
Static bending strength of the main board
Plane tensile strength\
Applicable to table with fine board as the base material. 2 Applicable to table with medium density fiberboard as the base material. 5.8 Table accessories are configured as specified in Table 6.
Accessory name and specification
Three, five-drawer hidden folding table
Cabinet table
Other types of table
Suitcase
6 Test method
6.1 Dimension inspection
Measurement unit
Table 6 Configuration of table accessories
$5×1690
$5X1720
This screw
The overall dimensions of the plywood and the hole dimensions of the machine head bottom plate are measured with a general measuring tool or special measuring tool with an accuracy of 0.5mm. Index value
6.2 Wood quality inspection
QB/T 2377—1998
6.2.1 Moisture content inspection: Under normal circumstances, use a moisture meter to measure three times at different locations and take the arithmetic average. During arbitration, the method specified in GB/T1931 shall be used for determination, and the samples shall be cut according to the provisions of 6.7. 6.2.2 The quality of the main surface of wood and general defects shall be visually inspected under natural light. 6.3 Appearance quality inspection
6.3.1 General requirements inspection
In natural light or in an environment with an illumination of (600±200)lx, the distance is 500mm for visual inspection and hand feeling. 6.3.2 Inspection of paint film gloss and metal plating
Judgment shall be made by visual inspection, or by comparison with standard samples or real objects. During arbitration, gloss meter may be used for determination according to the provisions of GB/T4893.6. 6.4 Processing quality inspection
6.4.1 Degumming inspection
Judgment shall be made by finger tapping and ear listening.
6.4.2 Flatness error inspection
Put a 70mm×18mm×18mm metal gauge block on any surface of the measured piece, and use a feeler gauge with a width of 10mm and a thickness of 0.3mm to measure the maximum gap between the gauge block and the plate surface, and it should meet the minimum conditions. 6.4.3 Full-length flatness error inspection
Put a 1m steel ruler on the diagonal direction of the surface of the measured piece, and use a feeler gauge to measure the maximum gap between the side of the steel ruler and the plate surface, and it should meet the minimum conditions. The maximum gap between the two diagonals is taken as the flatness error. During arbitration, it can be directly measured with a dial indicator. The method is as follows: Place the measured piece on a flat plate with two adjustable supports and one fixed support, adjust the three farthest points on the measured surface so that the three points are at the same height as the flat plate, and then use a dial indicator to measure at any position on the surface of the measured piece about 10mm away from the edge, and take the difference between the maximum and minimum as the flatness error. 6.4.4 Paint film hardness test
Add a load of 0.5N to a steel ball with a diameter of 1.5mm, place it on the surface of the painted piece, move it 50mm at a speed of 17mm/s, then clean it with a soft cloth and check for scratches.
6.4.5 Weather resistance test
6.4.5.1 Weather resistance test
Place the test piece in a constant temperature and humidity chamber with a temperature of (35±2)℃ and a humidity of (30±5)%r·h. Place it for 24 hours and then take it out to check its condition.
6.4.5.2 Humidity resistance test
The humidity resistance test must be carried out after the drought resistance test. Place the test piece in a constant temperature and humidity chamber with a temperature of (35±2)℃ and a humidity of (90±5)%r·h. Place it for 24 hours and then take it out to check its condition. 6.5 Assembly quality inspection
Use visual inspection and hand feel to judge.
6.6 Fitting accuracy inspection
Use vernier caliper or feeler gauge with an accuracy of 0.02mm to measure. 6.7 Physical and mechanical property inspection
Randomly select three sample boards and cut samples according to Figure 5 (for blockboard as base material) or Figure 6 (for medium density fiberboard as base material) for testing.
rKAoN KAca-
QB/T2377—1998
No. 1 to 4—dry shear strength test pieces, No. 5—post-tension static bending strength test piece: No. 6—moisture content test piece Figure 5 Sectional drawing of table top specimens with blockboard as base material Figure 6
No. 1 to 4—plane tensile strength test piece; No. 5—static bending strength test piece; No. 6 to 7—moisture content test piece Figure 6 Sectional drawing of table top specimens with medium density fiberboard as base material Figure 6.7.1 Dry shear strength test of glue layer
6.7.1.1 Take 12 pieces, No. 1 to 4, from the three sample pieces and make test pieces according to the provisions of Figure 7. 25±0.5
Width of shear surface
Length of cut surface
Figure 7 Preparation of dry shear strength test piece of adhesive layer Figure 20±1
6.7.1.2 Each test piece shall not have defects such as wood knots, swirls and blade cuts, and there shall be no more than one joint of thin wood strips on the surface of the sheared test piece. 6.7.1.3 After each test piece passes the inspection (the accuracy of the inspection gauge is 0.1mm), it shall be installed on the universal movable fixture of the universal testing machine for testing. The axis of the test piece shall be coaxial with the axis of the fixture, with an angle of no more than 14.The loading speed is 7 kN/min and the load is applied uniformly until the specimen breaks. At this time, the maximum breaking load value is read from the 413
QB/T2377--1998
force plate, and the reading is accurate to 5 N. 6.7.1.4 Calculation method
6.7.1.4.1 The dry shear strength of a single adhesive layer is calculated according to formula (1). S,
Where: S
The dry shear strength of a single adhesive layer, N/mm2; ~The maximum breaking load of the specimen, N;
A.-Width of the shear surface of the specimen, mm
Length of the shear surface of the specimen, mm.
6.7.1.4.2 The dry shear strength of the adhesive layer is calculated according to formula (2) (accuracy is 0.01 N/mm). s
Where: S—Dry shear strength of the adhesive layer, N/mm. 6.7.2 Static bending strength test of back-up
6.7.2.1 Take three pieces of No. 5 from the three sample plates as test pieces. 12
6.7.2.2 After each test piece passes the test (the accuracy of the test gauge is 0.1mm), it shall be placed on the universal testing machine for testing according to the provisions of Figure 8. The load shall be applied evenly at a loading speed not exceeding 3.92kN/min until it breaks. At this time, read the maximum breaking load value from the force gauge plate with an accuracy of 5N.
6.7.2.3 Calculation method
520(L)
Figure 8 Schematic diagram of static bending strength test of back-up
The static bending strength of a single back-up shall be calculated according to formula (3). 6. 7. 2. 3. 1
Wherein 8.-
Single-piece back-up static bending strength, N/mm,
Test piece failure load, N;
L Two-point span, mm,
B--——Test piece width (i.e. the length of the median line of the central section of the test piece), mm, H Test piece thickness, mm.
6.7.2.3.2 Back-up static bending strength is calculated according to formula (4) (accuracy is 0.01N/mm). Wherein;-
Back-up static bending strength, N/mm2.
TiKAoNiKAca-
75±1(B)
（3）
（4）
6.7.3 Plane tensile strength test
QB/T 2377-1998
Perform the determination method specified in GB/T11718.7. 6.8 Accessory inspection
Count according to the provisions of 5.8.
7 Inspection regulationswwW.bzxz.Net
7.1 Products must pass the quality inspection of the manufacturer, and a qualified mark must be printed on a conspicuous position on each qualified platen. 7.2 Inspection classification
Product inspection is divided into factory inspection and type inspection. 7.2.1 Factory inspection
When the product is delivered, the consignee has the right to inspect and accept it according to the factory inspection items specified in this standard. 7.2.2 Type inspection
In the following cases, a comprehensive assessment of product quality is required and type inspection should be carried out: a) Trial production and identification of new products or old products transferred to the factory for production; b) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; c) Formal production should be inspected periodically every year; d) When the product is resumed after a long period of suspension; e) When the factory inspection results are significantly different from the last type inspection; ) When the superior quality supervision agency proposes a requirement for type inspection. 7.2.3 Product quality characteristics and inspection categories
See Table 7 for product quality characteristics and inspection categories. Table 7 Inspection items and inspection classification
Item category Chapter
Knot size#
Wood quality
Appearance quality
Inspection items
Head bottom plate support size
Head second hinge combustion axis coordinate size
Table plate overall size
Material moisture content
Main surface wood decay, cracks
Surface patches and general missing materials
Reading film color is basically the same
Surface paint film of each board is bubbling, peeling and cracking. General defects of surface paint film of each component
Decorative board Surface stains, dry and wet spots, etc.
Decal quality
Surface rust and blistering of electroplated parts
Surface oxide film and spots of blackened parts
Surface flatness, paint peeling and blistering of painted parts
Exposed screws and steel nails
Unqualified classification
Inspection classification
Item category
Processing quality
Assembly quality
Mixed alcohol
Physical mechanics
7.3 Factory inspection rules
7.3.1 Sample extraction
QB/T 2377-1998
Table 7 (end)
Inspection items
Debonding within 25mm on the surface and along the edge of each board
Debonding of each component and partial debonding of each board
Flatness error within 70mm on the surface of each board
Flatness error of the entire length of the surface of each board
Fine cracking and scraping of decorative panels, etc.
Hardness of main surface paint film
Weather resistance
Wooden parts should be installed firmly and correctly, etc.
Metal accessories should be installed firmly and correctly, etc.
Screws and nails should not be loose or pierced, etc.
Locks should be installed in the correct position and rotate flexibly
The table of the detachable bucket should be able to be assembled||t t||Between the cover plate and each plate
Between the seat plate and the main board
Gap between the flap and the cutout
Gap between the drawer, swing bucket and the main board
Gap between the drawer and the bucket frame
Gap between the table door and the frame
Average distance between the cover plate, flap and the inner frame of the main board
Height error between the hinge and the component after assembly
Between the hinge and the component after assembly
Plane clearance between the chassis cover and the chassis seat
Dry shear strength of the adhesive layer
Static bending strength of the main board back
Plane tensile strength
Configuration of table accessories
Samples should be randomly selected from the submitted inspection batch. 7.3.2 Sampling plan and strictness
Unqualified classification
The normal inspection sampling plan is shown in Table 8. The strictness is determined in accordance with 4.6 of GB/T2828-1987. 416
TTiKAoNiKAca
Inspection classification2 Inspection classification
Product inspection is divided into factory inspection and type inspection 7.2.1 Factory inspection
When the product is delivered, the consignee has the right to accept it according to the factory inspection items specified in this standard. 7.2.2 Type inspection
In the following cases, it is necessary to conduct a comprehensive assessment of product quality and conduct type inspection: a) Trial production and identification of new products or old products transferred to the factory for production; b) After formal production, if there are major changes in structure, materials, and processes, which may affect product performance; c) Formal production should be inspected periodically every year; d) When the product is resumed after a long period of suspension; e) When the factory inspection results are significantly different from the last type inspection:) When the superior quality supervision agency proposes a requirement for type inspection. 7.2.3 Product quality characteristics and inspection classification
See Table 7 for product quality characteristics and inspection classification. Table 7 Inspection items and inspection classification
Item category Chapter
Knot size#
Wood quality
Appearance quality
Inspection items
Head bottom plate support size
Head second hinge combustion axis coordinate size
Table plate overall size
Material moisture content
Main surface wood decay, cracks
Surface patches and general missing materials
Reading film color is basically the same
Surface paint film of each board is bubbling, peeling and cracking. General defects of surface paint film of each component
Decorative board Surface stains, dry and wet spots, etc.
Decal quality
Surface rust and blistering of electroplated parts
Surface oxide film and spots of blackened parts
Surface flatness, paint peeling and blistering of painted parts
Exposed screws and steel nails
Unqualified classification
Inspection classification
Item category
Processing quality
Assembly quality
Mixed alcohol
Physical mechanics
7.3 Factory inspection rules
7.3.1 Sample extraction
QB/T 2377-1998
Table 7 (end)
Inspection items
Debonding within 25mm on the surface and along the edge of each board
Debonding of each component and partial debonding of each board
Flatness error within 70mm on the surface of each board
Flatness error of the entire length of the surface of each board
Fine cracking and scraping of decorative panels, etc.
Hardness of main surface paint film
Weather resistance
Wooden parts should be installed firmly and correctly, etc.
Metal accessories should be installed firmly and correctly, etc.
Screws and nails should not be loose or pierced, etc.
Locks should be installed in the correct position and rotate flexibly
The table of the detachable bucket should be able to be assembled||t t||Between the cover plate and each plate
Between the seat plate and the main board
Gap between the flap and the cutout
Gap between the drawer, swing bucket and the main board
Gap between the drawer and the bucket frame
Gap between the table door and the frame
Average distance between the cover plate, flap and the inner frame of the main board
Height error between the hinge and the component after assembly
Between the hinge and the component after assembly
Plane clearance between the chassis cover and the chassis seat
Dry shear strength of the adhesive layer
Static bending strength of the main board back
Plane tensile strength
Configuration of table accessories
Samples should be randomly selected from the submitted inspection batch. 7.3.2 Sampling plan and strictness
Unqualified classification
The normal inspection sampling plan is shown in Table 8. The strictness is determined in accordance with 4.6 of GB/T2828-1987. 416
TTiKAoNiKAca
Inspection classification2 Inspection classification
Product inspection is divided into factory inspection and type inspection 7.2.1 Factory inspection
When the product is delivered, the consignee has the right to accept it according to the factory inspection items specified in this standard. 7.2.2 Type inspection
In the following cases, it is necessary to conduct a comprehensive assessment of product quality and conduct type inspection: a) Trial production and identification of new products or old products transferred to the factory for production; b) After formal production, if there are major changes in structure, materials, and processes, which may affect product performance; c) Formal production should be inspected periodically every year; d) When the product is resumed after a long period of suspension; e) When the factory inspection results are significantly different from the last type inspection:) When the superior quality supervision agency proposes a requirement for type inspection. 7.2.3 Product quality characteristics and inspection classification
See Table 7 for product quality characteristics and inspection classification. Table 7 Inspection items and inspection classification
Item category Chapter
Knot size#
Wood quality
Appearance quality
Inspection items
Head bottom plate support size
Head second hinge combustion axis coordinate size
Table plate overall size
Material moisture content
Main surface wood decay, cracks
Surface patches and general missing materials
Reading film color is basically the same
Surface paint film of each board is bubbling, peeling and cracking. General defects of surface paint film of each component
Decorative board Surface stains, dry and wet spots, etc.
Decal quality
Surface rust and blistering of electroplated parts
Surface oxide film and spots of blackened parts
Surface flatness, paint peeling and blistering of painted parts
Exposed screws and steel nails
Unqualified classification
Inspection classification
Item category
Processing quality
Assembly quality
Mixed alcohol
Physical mechanics
7.3 Factory inspection rules
7.3.1 Sample extraction
QB/T 2377-1998
Table 7 (end)
Inspection items
Debonding within 25mm on the surface and along the edge of each board
Debonding of each component and partial debonding of each board
Flatness error within 70mm on the surface of each board
Flatness error of the entire length of the surface of each board
Fine cracking and scraping of decorative panels, etc.
Hardness of main surface paint film
Weather resistance
Wooden parts should be installed firmly and correctly, etc.
Metal accessories should be installed firmly and correctly, etc.
Screws and nails should not be loose or pierced, etc.
Locks should be installed in the correct position and rotate flexibly
The table of the detachable bucket should be able to be assembled||t t||Between the cover plate and each plate
Between the seat plate and the main board
Gap between the flap and the cutout
Gap between the drawer, swing bucket and the main board
Gap between the drawer and the bucket frame
Gap between the table door and the frame
Average distance between the cover plate, flap and the inner frame of the main board
Height error between the hinge and the component after assembly
Between the hinge and the component after assembly
Plane clearance between the chassis cover and the chassis seat
Dry shear strength of the adhesive layer
Static bending strength of the main board back
Plane tensile strength
Configuration of table accessories
Samples should be randomly selected from the submitted inspection batch. 7.3.2 Sampling plan and strictness
Unqualified classification
The normal inspection sampling plan is shown in Table 8. The strictness is determined in accordance with 4.6 of GB/T2828-1987. 416
TTiKAoNiKAca
Inspection classification
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.