General technical conditions for painting equipment Part 1:Fabricating parts
Some standard content:
ICS25.220.70
Machinery Industry Standard of the People's Republic of China
JB/T10394.1--2002
General technical conditions for painting equipmentPart 1:Fabricating parts
2002-12-27 Issued
2003-04-01 Implementation
Foreword.…
Introduction,
1 Scope
Normative references
3 Terms and definitions
3.1 Siding.
3.2 Insulating siding.
3.3 Cutting length,
3.4 Cutting width.
Technical requirements.…
General requirements,
Edge and corner blanking and punching|| tt||Sheet metal bending,
Assembly and welding
Requirements for special sheet metal partsbZxz.net
Inspection rules
Marking, packaging, transportation and storage
Transportation and storage,
Figure 1 Part bending angle
Figure 2 Schematic diagram of hole diameter and hole center position deviationFigure 3
Corner and bolt connection hole
Welding between natural extension and compression galvanized steel plates in the bending deformation area
Figure 6 Welded seam of air duct..
Figure 7 Grinding after folding welding.
Table 1 Limit deviation of linear dimensions without tolerance requirementsTable 2 Limit deviation of plate bending angle..…Table 3 Limit deviation of hole diameter and hole center positionTable 4 Limit deviation of shear width and diagonal difference for dimensions greater than 3150mmJB/T10394.1—2002
JB/T10394 "General Technical Conditions for Coating Equipment" is divided into the following parts: Part 1: Sheet metal parts;
- Part 2: Welded parts:
Part 3: Coating:
- Part 4: Installation.
This part is the first part of JB/T10394. JB/T10394.1—2002
JB/T10394 "General Technical Conditions for Coating Equipment" is a multi-part standard. Under the general title of "General Technical Conditions for Coating Equipment", in addition to the above 4 parts, electrical and other parts will be added. This part is proposed by the China Machinery Industry Federation. This part is under the jurisdiction of the National Technical Committee for Standardization of Metal and Non-metal Coverings. Drafting units of this part: Shanghai Mechanical and Electrical Design Institute, Shanghai Coating Engineering Company, Machinery Industry Fourth Design Institute, Wuhan Boli Electromechanical Development Co., Ltd., Wuhan Materials Protection Research Institute, China Shipbuilding Industry Corporation 707 Institute, Beijing Polonus Coating Equipment Co., Ltd., Guangzhou Nanya Angger Thermal Energy Company, Jiangsu Provincial Labor Protection Research Institute. The main drafters of this part: Shan Guoliang, Tao Yunliang, Li Juying, Qu Yinyan, Liu Xiaojun, Zhang Shaoshan, Yang Yumin, Zhang Xueyou, Kuang Yandi, Jin Xuefang.
JB/T10394.1--2002
In order to adapt to the development of coating technology in my country, further improve the manufacturing quality of coating equipment, and promote the economic development of the coating industry, the China Surface Engineering Association accepted the requirements of its members and organized major units such as Shanghai Mechanical and Electrical Design Institute under the leadership of the Coating Branch to compile JB/T10394 "General Technical Conditions for Coating Equipment".
JB/T10394 is based on the current situation and development direction of coating equipment in my country, summarizing the practical experience of research, production and use over the years, referring to relevant domestic industry standards, and absorbing foreign advanced experience. At present, four parts of JB/T10394.1 to 4 have been completed, and other relevant standards will be formulated in the future. 1 Scope
General technical conditions for coating equipment
Part 1: Sheet metal parts
JB/T10394.1—2002
This part specifies the technical requirements, inspection rules, marking, packaging, transportation and storage requirements for sheet metal parts of coating equipment with a material thickness not exceeding 4mm.
This part applies to the production and acceptance of sheet metal parts of coating equipment. 2 Normative references
The clauses in the following documents become the clauses of this part through reference to this part of JB/T10394. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this part. However, the parties to the agreement based on this part are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version shall apply to this part.
GB/T3375 Welding terms
GB/T8264 Painting technical terms
GB/T13915—1992 Angle tolerance of stamped parts GB50243—1997 Construction and acceptance specifications for ventilation and air conditioning projects JB/T43811999 Limit deviation of dimensions without tolerances for stamping and shearing 3 Terms and definitions
GB/T3375 and GB/T8264 and the following terms and definitions apply to this part of JB/T10394. 3.1
Parts made of a single sheet of metal as raw material, using processes such as shearing, punching corners, bending and seam welding. Wall panels are often used to assemble enclosures such as spray booths, leveling rooms, and passages, as well as door panels, pre-treatment and electrophoresis spray tunnels, etc. 3.2
Insulation wall panel
A plate-shaped part made of a single metal sheet as the main raw material, supplemented by profiles for reinforcement, filled with insulation materials, with insulation performance and with plug-in interfaces.
Insulation wall panels are used to assemble heating equipment such as drying rooms. 3.3
Shearing length
The length of the sheet cut by the shearing machine blade.
[JB/T4381—1999, Terminology 2.2] 3.4
Shearing width
The distance from the cutting edge of the shearing machine blade to the opposite edge [JB/T4381--1999, Terminology 2.1] 4 Technical requirements
4.1 General requirements
JB/T10394.1—2002
4.1.1 The production of sheet metal parts for coating equipment shall comply with the design drawings, process documents and the provisions of this part. 4.1.2 The raw materials used to manufacture sheet metal parts shall meet the relevant standards and technical conditions and have a factory certificate. 4.1.3 The raw materials used to manufacture sheet metal parts shall meet the requirements of the drawings, and material substitution shall be agreed upon by the designer and the supplier. 4.1.4 Sheet metal parts shall be made of integral materials. For individual overlong plates, they can be spliced without affecting the appearance quality. The splicing method shall be agreed upon by the designer and the supplier.
4.1.5 For sections with a surface roughness R equal to or greater than 12.5um, when manufactured by shearing, punching, or drilling, the surface roughness shall not be checked. When the surface roughness requirements are not specified on the drawings, they shall be manufactured according to the maximum allowable value of R equal to or greater than 12.5um. 4.1.6 Appearance and surface condition:
4.1.6.1 Sheet metal parts are not allowed to have cracks, splits, delamination, and rust. 4.1.6.2 The surface of sheet metal parts is allowed to have slight scratches and abrasions, as well as residual defects or smooth and uniform tool marks allowed by the technical conditions of the raw materials. When the material thickness is less than 2mm, the depth shall not exceed 10% of the nominal thickness of the material; when the material thickness is equal to or greater than 2mm, the depth shall not exceed 0.2mm. However, on the same surface of the part, the total length of the scars with a depth of more than 1/2 of the above limit value shall not exceed the maximum linear dimension of the surface.
4.1.6.3 Sheet metal parts should be deburred, and edges with a material thickness greater than 0.5mm should be desharpened. 4.1.7 Limit deviations of dimensions without tolerances: 4.1.7.1 For linear dimensions without tolerance requirements on the drawing and not specified in this section, their limit deviations shall be in accordance with the provisions of Table 1. Table 1 Limit deviation of linear dimensions without tolerance requirements Unit: mm
Basic size
Limit deviation
>400~1000
>1000~2000
>2000~~4000
>4000~8000
Limit deviation of plate bending angle (including unspecified right angle and equal polygon angle) (see Figure 1) is in accordance with Table 2. 4.1.7.2
Linear deviation
Figure 1 Part bending angle
Table 2 Limit deviation of plate bending angle
Angle short side L
Right angle bending
Limit deviation
Non-right angle bending
Limit deviation
Linear deviation"
±1°30
>10～25
±1°30
is the linear deviation for every 100mm length. The meaning of linear deviation is shown in Figure 1, 4.1.7.3
>25~63
>63~160
>160～400||tt ||The limit deviations of the hole diameter and hole center position (see Figure 2) not indicated on the drawing and not specified in this part shall be in accordance with Table 3. Table 3 Limit deviations of hole diameter and hole center position>400
Unit: mm
Deviation of hole diameter
Limit deviation
Deviation of center distance L of hole
>±8～Φ12
Center line deviation T
>48～$12
For bolt connection holes used for assembly on sheet metal parts, the limit deviation of the center distance between any two holes is ±0.5mm. >412
4.1.8 Unindicated shape and position tolerances:
JB/T 10394.1-—2002
4.1.8.1 For parts where geometric tolerances are not indicated on the drawings and are not specified in this section, the corresponding linear dimension tolerances or angular tolerances of each element shall be used for control.
Figure 2 Schematic diagram of the deviation of the hole diameter and the hole center position 4.1.8.2 The flatness and straightness tolerances of plate-bent profile parts shall be 1mm per meter in length and shall not exceed 3mm in the entire length. 4.1.8.3 For sheet metal parts that bear loads, the straightness and flatness tolerances shall be 1mm per meter in length. 4.1.8.4 For wall panel parts such as room wall panels, roof panels, door opening panels and tunnel wall panels, as well as other sheet metal parts that generally have no effect on working performance but may affect assembly and product appearance quality, the surface flatness tolerance shall be 1.5mm per meter in length. 4.1.8.5 For water flow, air flow distribution and working 4.1.8.6 Sheet metal parts assembled inside the equipment, such as water flow grooves and water collection grooves, generally do not affect the working performance and product appearance, and the flatness tolerance of their surfaces is 1.5mm per meter. 4.1.8.7 When used as a reference for installation and assembly, the straightness and flatness tolerance of sheet metal parts is 1mm per meter. 4.2 Cutting
Sheet metal should be cut by shearing, and profiles should be cut by grinding wheel or sawing, and burrs should be removed. 4.2.1
After cutting, the steel plate should be leveled, and the flatness tolerance of the steel plate is required to be 1.5mm per meter. The profile should be straightened after cutting, and the straightness tolerance is 1.5mm per meter. For parts manufactured by shearing and punching, when the thickness is ≤0.5mm, it is allowed not to remove burrs. 4.2.4
Shearing and punching sections are allowed to have naturally formed bevels. When checking the dimensions, the outer shape is measured according to the maximum dimension, and the inner hole is measured according to the minimum dimension 4.2.5
.
When shearing plates, the limit deviation of the shear width, the tolerance of the shear straightness and the tolerance of the shear verticality that are not indicated on the drawing shall be in accordance with the provisions of Table 1, Table 2 and Table 3 in 4.2.6
JB/T4381-1999. For the production of wall panels, it shall be grade A, and for others, it shall be grade B. The limit deviation of the shear width and the difference of the diagonal for dimensions greater than 3150mm shall be in accordance with Table 4. Table 4 Limit deviation and diagonal difference of shear width for sizes greater than 3150mm Unit: mm
Shear width
Limit deviation
Difference of diagonal
4.3 Corner blanking and punching
>3150~6000
4.3.1 The corners and bolt connection round holes or long holes on batches of unfolded materials should be punched on a press machine using a punching die, see Figure 3.
中中中
Figure 3 Corners and bolt connection holes
JB/T10394.1--2002
4.3.2 The blanking angle tolerance value of the corners shall be selected according to Table 1 in GB/T13915-1992. When one-way deviation is selected, AT2 level can be selected; when two-way deviation is selected, AT4 level can be selected.
4.3.3 After the corners and holes are punched, the material should be flat, and cracks, peeling and breaks are not allowed. However, naturally formed fillets, indentations and sagging are allowed.
4.4 Plate bending
4.4.1 All plates must be straightened, flattened, free of deflection and scale before bending. 4.4.2 For rolled plates, strips, wide flat steels, etc., it is advisable to be bent perpendicular to the rolling direction, but soft materials can be parallel to the bending line of the parts.
When parts need to be bent in different directions, it is advisable to make the angle between the bending line of the parts and the fiber direction of the sheet equal to 45°. When the structural shape or size of the parts cannot meet the above angle requirements, a larger bending radius can be selected. 4.4.3 When the plate is bent, the inner bending radius not indicated on the drawing can be selected according to the V-shaped opening size of the press die. No inspection after forming 4.4.4 Parts are allowed to have natural extension and compression in the bending deformation area, and no grinding or inspection is required, see Figure 4. A~A
Extension and widening
Contraction and narrowing
Figure 4 Natural extension and compression in the bending deformation area 4.5 Assembly welding
4.5.1 The welding method for the welding of the joints of the plate parts after bending and the assembly welding of the formed plate parts and other profiles in the sheet metal parts shall be as follows:
4.5.1.1 Inert gas shielded welding shall be used for welding between plates with a thickness of ≤2mm. 4.5.1.2 Argon arc welding shall be used for welding between stainless steel and stainless steel and stainless steel and carbon steel. 4.5.2 In assembly welding, when the plates are butt-jointed, the two plate surfaces shall be flush and the gap shall comply with the drawings and relevant regulations; overlap can be used when welding the plate and the steel section, and intermittent welding is suitable for controlling deformation. 4.5.3 For the welding of galvanized steel plates with a thickness of ≤2mm, it is advisable to weld after folding the edges, as shown in Figure 5. Intermittent welding on demand
Figure 5 Welding between galvanized steel plates
Intermittent welding on demand
4.5.4 The welding materials such as welding rods, welding wires, flux and shielding gas used for welding should match the materials to be welded. And they should all comply with relevant national standards.
4.5.5 The weld should have uniform width and uniform welding wave. There should be no defects such as cracks and burn-through. The deformation of parts after welding should be corrected. 4.5.6 After welding, the weld and welding area must be thoroughly cleaned and there should be no welding slag and spatter. 4.5.6.1 The stainless steel weld should be surface treated. The weld surface and heat-affected zone after treatment should not be discolored or rusted. 4.5.6.2 The weld surface and heat-affected zone of galvanized sheet should be coated with anti-corrosion primer. 4.6 Requirements for special sheet metal parts
4.6.1 Air duct
JB/T10394.1—2002
4.6.1.1 The limit deviation of the manufacturing dimensions of air duct and flange shall be in accordance with the following provisions: When the outer diameter or outer side length of the air duct is less than or equal to 300mm, the allowable deviation is -1mm~0mm; when it is greater than 300mm, it is -2mm~0mm. The allowable deviation of the inner diameter or inner side size of the flange is +1mm~+3mm, and the allowable deviation of flatness is 2mm. The difference between the two diagonals of the rectangular flange should not be greater than 3mm (see 3.1.8 in GB50243-1997).
4.6.1.2 When making air duct, the splicing of the plate can be done by bite or welding. When the plate thickness of the carbon steel air duct is less than or equal to 1.2mm, bite joint is suitable; when it is greater than 1.2mm, welding is suitable. 4.6.1.3 For the connection between the air duct and the flange, when the wall thickness is less than 1.5mm, the flange riveting can be used, and the riveting should be firm; when the wall thickness is equal to or greater than 1.5mm, full welding or flange intermittent welding can be used. 4.6.1.4 The connection method and requirements of the air duct without flange shall comply with the provisions of 3.1.10 and 3.1.11 in GB50243-1997. 4.6.1.5 The strength and tightness requirements of the air duct shall comply with the design regulations and the requirements of the air duct system. The sealing requirements of the air duct system and the allowable air leakage per unit area shall comply with the provisions of 3.1.13, 3.1.14 and 3.1.15 in GB50243-1997. 4.6.1.6 The joint form, scope of use and requirements of the bite-jointed air duct shall comply with the provisions of 3.1.6 in GB50243-1997. 4.6.1.7 Welding of air ducts:
4.6.1.7.1 The plate splicing of welded air ducts should be welded according to Figure 6. or
Figure 6 The joint of welded air ducts
4.6.1.7.2 Large-format plates should be used to make air ducts to reduce longitudinal joints and no transverse joints should be allowed. 4.6.1.7.3 The bending edges of the joints should be uniform and flat, and the two folded edges should be tightly attached. Continuous sealing welding should be adopted. The welds should be visually inspected, the welding waves should be uniform, and there should be no defects such as slag inclusions, pores, and cracks. The deformation of the plates should be corrected. 4.6.1.7.4 The welding of air ducts should be carried out by different methods according to the materials used. Stainless steel plates should be welded by argon arc welding or arc welding, and gas welding should not be used; carbon steel plates should be welded by inert gas shielded welding. 4.6.2 Wall panels
4.6.2.1 The appearance of the outer surface of the wall panels should be flat and smooth. The original gloss (stainless steel parts) and galvanized film (galvanized sheet parts) of the material shall not be damaged. Its appearance and surface condition shall not be lower than the requirements of 4.1.6.1. 4.6.2.2 For wall panels with assembly requirements, the limit deviation of the length and width of the sides without tolerance requirements is -1.5mm, and the difference between the diagonals shall not exceed 2mm.
4.6.2.3 The flatness tolerance value of the wall panel surface shall be in accordance with the following provisions: 4.6.2.3.1 For wall panels assembled by bolt butt, the flatness tolerance value of the wall panel surface shall be 1mm per meter of length. 4.6.2.3.2 For wall panels assembled by welding, the flatness tolerance value of the wall panel surface shall be 3mm per meter. 4.6.2.4 Multiple panels (including bolted panels and welded panels) are assembled into components (usually 3-4 panels) in the workshop. The limit deviation of the length and width of the sides without tolerance requirements and the difference of the diagonal lines shall still be in accordance with the provisions of 4.6.2.2. 4.6.2.5 The joints around the bent edges of the panels can be fully welded or partially welded as required. When grinding after welding, the edges shall not be rounded, and the two sides shall be ground to right angles, see Figure 7.
Keep right angles
Figure 7 Grinding after folding welding
JB/T10394.1-2002
4.6.2.6 For components assembled by welding multiple single panels for pre-treatment and post-electrophoresis flushing spray tunnels, the joint welds shall be sealed and tested for leakage.
4.6.3 Insulation wall panels
4.6.3.1 The quality of the outer surface of the insulation wall panels shall comply with the provisions of 4.6.2.1. 4.6.3.2 The limit deviation of the length of each side of the insulation wall panels without tolerance shall comply with the provisions of Table 1. 4.6.3.3 The flatness tolerance value of the outer surface of the insulation wall panels is 1.2mm per meter. 4.6.3.4 The difference between the diagonals of the outer surface of the insulation wall panels shall not exceed 2mm, and the difference between the diagonals of the upper and lower top surfaces shall not exceed 1mm. 4.6.3.5 The laying of the insulation material in the insulation wall panels shall be filled tightly and evenly. When the total thickness of the insulation layer is greater than or equal to 80mm, it should be laid in layers with staggered seams, and the staggered seam distance should be greater than 100mm.
5 Inspection rules
5.1 The sheet metal parts of the coating equipment shall be inspected by the quality inspection department of the manufacturer according to the drawings, relevant technical documents and this part. 5.2 The sheet metal parts shall be subject to first piece inspection, patrol inspection and acceptance inspection. 5.3 In principle, the sheet metal parts shall be subject to general inspection. General inspection includes: a) Appearance inspection: Appearance inspection is to inspect the appearance and surface quality of the sheet metal parts by hand touch, visual inspection and other methods. b) Accuracy inspection: Accuracy inspection uses tools, fixtures and measuring tools to inspect the size, shape and position tolerance of the sheet metal parts. 5.4 When there are special requirements (mechanical properties, flaw detection, leakage, etc.) on the drawings and other technical documents, they shall be inspected by the corresponding professional departments and a certificate of conformity shall be issued after the inspection is qualified. 6 Marking, packaging, transportation and storage
6.1 Marking
Sheet metal parts shall be marked, and marks and labels may be affixed to appropriate parts as needed. The marking shall indicate the manufacturing order number, drawing number, part number, quantity and specifications and dimensions.
6.2 Packaging
6.2.1 Different packaging forms and protection methods should be adopted according to the characteristics, storage and transportation conditions, and loading and unloading conditions of sheet metal parts. The packaging should be firm and ensure that the packaged parts will not be deformed and affect the quality of sheet metal parts. 6.2.2 From the date of packaging, under normal storage and transportation conditions, it should be ensured that sheet metal parts will not be rusted, moldy, damaged, reduced in precision, or lost due to poor packaging for at least half a year.
6.2.3 Sheet metal parts can only be packaged after they have passed the inspection and have been properly protected and other relevant treatments. 6.2.4 For wall panels and thermal insulation wall panels with high surface quality requirements, it is advisable to adopt a packaging form in which they are roughly classified by size, corresponding fixed transportation brackets are made, and protective materials are added to the middle of the wall panels. 6.3 Transportation and storage
6.3.1 When loading and unloading sheet metal parts, measures should be taken to ensure that the surface is not deformed by collision and extrusion, and is not rusted or contaminated. 6.3.2 Sheet metal parts should be placed in a reasonable, neat and orderly manner after entering the warehouse to prevent deformation and scratches.2 From the date of packaging, under normal storage and transportation conditions, it should be ensured that sheet metal parts will not be corroded, damaged by mold, reduced in precision or lost due to poor packaging for at least half a year.
6.2.3 Sheet metal parts can only be packaged after they have passed the inspection and have been properly protected and other relevant treatments. 6.2.4 For wall panels and thermal insulation wall panels with high surface quality requirements, it is advisable to adopt the packaging form of roughly classifying them by size, making corresponding fixed transportation brackets, and padding the middle of the wall panels with protective materials. 6.3 Transportation and storage
6.3.1 When loading and unloading sheet metal parts, measures should be taken to ensure that the surface is not deformed by collision and extrusion, and is not corroded or contaminated. 6.3.2 After entering the warehouse, the sheet metal parts should be placed reasonably, neatly and orderly to prevent deformation and scratches. 62 From the date of packaging, under normal storage and transportation conditions, it should be ensured that sheet metal parts will not be corroded, damaged by mold, reduced in precision or lost due to poor packaging for at least half a year.
6.2.3 Sheet metal parts can only be packaged after they have passed the inspection and have been properly protected and other relevant treatments. 6.2.4 For wall panels and thermal insulation wall panels with high surface quality requirements, it is advisable to adopt the packaging form of roughly classifying them by size, making corresponding fixed transportation brackets, and padding the middle of the wall panels with protective materials. 6.3 Transportation and storage
6.3.1 When loading and unloading sheet metal parts, measures should be taken to ensure that the surface is not deformed by collision and extrusion, and is not corroded or contaminated. 6.3.2 After entering the warehouse, the sheet metal parts should be placed reasonably, neatly and orderly to prevent deformation and scratches. 6
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