JB/T 10214-2000 Tables 7 and 8 in this standard are equivalent to Table 1 in Part 1 "Linear Dimension Tolerances" and Table 1 in Part 3 "Geometric Tolerances" of DIN 8570:1987 "General Tolerances for Welded Components". This standard specifies the materials of riveted welded parts, the splicing of main riveted welded parts, the blanking tolerances, manufacturing tolerances and riveting quality requirements of riveted welded parts. This standard is applicable to riveted welded parts in centrifugal and axial flow fans. Riveted welded parts of other fans can also be used for reference. This standard was first issued in August 2000. JB/T 10214-2000 Technical Conditions for Riveted Welded Parts of Fans JB/T10214-2000 Standard download decompression password: www.bzxz.net

JB/T10214—2000
Table 7 and Table 8 in this standard are equivalent to Table 1 in Part 1 “Linear Dimension Tolerances” and Table 1 in Part 3 “Geometric Tolerances” of DIN8570:1987 “General Tolerances for Welded Components”. This standard is proposed and managed by the National Technical Committee for Standardization of Fans. The drafting units of this standard are Shenyang Blower Factory and Shenyang Fan Factory. The main drafters of this standard are Kong Guilan, Zhang Enxiang and Xiao Lifang. 415
1 Scope
Machinery Industry Standard of the People's Republic of China
Technical Conditions for Riveting and Welding Parts of Fans
Specifications of riveting and welding part for fansJB/T 10214—2000
This standard specifies the materials of riveting and welding parts, the splicing of main riveting and welding parts, the blanking tolerances, manufacturing tolerances and riveting quality requirements of riveting and welding parts. This standard applies to the riveted and welded parts in centrifugal and axial fans. The riveted and welded parts of other fans can also be used for reference. 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 the parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T8923-1988 Surface rust grade and rust removal grade of steel before painting JB/T10213--2000 Technical conditions for welding quality inspection of fans 3 Terminology
3.1 Material
The process of directly marking the shape of the component and the processing boundary on the material according to the drawing or using the template, sample rod, etc. 3.2 Blanking
The process of separating the material into the required parts through gas cutting, shearing, sawing, punching and other processes. 3.3 Sample punching
The method of punching points on the center line or auxiliary line with a sample punch after roughing or marking the workpiece is called sample punching, and the punching points are called sample punching.
4 Materials for riveted welded parts
4.1 The materials used for ventilator riveted welded parts shall comply with the provisions of relevant material standards, and rotating parts shall have a certificate of conformity or inspection report. 4.2 It is strictly forbidden to use materials with defects such as interlayer and heavy skin. 4.3 The outer surface of non-rotating parts is allowed to have scratches with a depth of no more than 0.5mm, and shall be putty-finished before painting; the depth of local scratches on aluminum shall not exceed 0.3mm.
4.4 The mechanical properties of the substitute material for rotating parts shall not be lower than those of the replaced material. 4.5 The welding rods selected for welded parts shall be selected according to the material of the drawing, and their mechanical properties shall not be lower than those of the parent material. 4.6 According to the provisions of GB/T8923, materials with rust levels below B shall not be used on rotating parts or on the outer surfaces of other parts.
5 Splicing of main riveted and welded parts
5.1 Centrifugal fan
5.1.1 The number of allowed splicing blocks of the impeller disc and wheel cover shall not exceed the provisions of Table 1. Except for the flat wheel cover, the other wheel covers are generally radially spliced, and the joint positions of the impeller disc and flat wheel cover are as specified in Figures 1 and 2 respectively. Approved by the State Machinery Industry Bureau on August 31, 2000, 416
Implementation on January 1, 2001
Impeller diameter
280~400
≥400～1 ​​000
>1 000～~1 600
≥1600~2800
Flat impeller cover
Impeller diameter refers to the blade outlet diameter.
2“-” indicates that splicing is not allowed.
JB/T 10214—
Table 1 The number of pieces allowed to be spliced ​​between the wheel disc and the wheel coverWww.bzxZ.net
Conical wheel cover
Hub extension
Joint position of wheel disc
5.1.2 Air inlet
Single arc wheel cover
Double arc wheel cover
Figure 2 Joint position of flat wheel cover
Type a and b air inlets with machine number greater than or equal to N4 are allowed to have an annular joint near the tangent point of the annular surface and the conical surface; type c air inlets are allowed to have an elliptical joint near the tangent point. The simple plate of type e air inlets is allowed to have an axial joint; the joint positions of various types of air inlets are shown in Figure 3. The number of equally divided splicing pieces shall be in accordance with the provisions of Table 2.
Girth weld
Figure 3 Joint positions of various types of air inlets
Elliptical weld
Machine No. Ng
>4～8
>8～12. 5
>12.5~～16
>16～18
>18～20
>20~-22. 4
>22. 4~～25
>25～28
5.1.3 Adjustment door
JB/T 10214-2000
Grooved ring
Number of equally divided blocks for air inlet
Upper ring
Lower ring
Grooved ring
The number of blocks allowed to be spliced ​​for the simple plate and flange ring of the regulating door shall be in accordance with the provisions of Table 3, and the joints of the flange ring shall avoid the equally divided holes of the circumference. The narrow end flange of the rectangular regulating door is not allowed to be spliced, and the long end is allowed to be ≤2 blocks spliced. The joints must avoid the aperture and be polished after welding. Table 3 Number of blocks allowed to be spliced ​​for the simple plate and flange ring of the regulating door Machine No
>12.5～16
>16～18
>18～20
>20～22. 4
>22. 4～25
>25～28
5.1.4． Casing
Number of cylinder plates
Number of flange rings
Minimum length of cylinder plate joints
≥1/3 perimeter
≥1/4 perimeter
≥1/5 perimeter
≥1/6 perimeter
The joints of the side panels of the casing should generally be parallel or perpendicular to the air outlet edge, and the width of the minimum number of joints shall not be narrower than 100mm. When the machine number is less than or equal to N16, the joint position of the volute plate shall be in accordance with Figure 4; when the machine number is greater than N16, the joint position can be selected from Figures 4 and 5. When Figure 5 is selected, the number of allowed joints shall not exceed 2n-1. Note: n is the number of volute plates in Table 4 (excluding the diffuser part with a diffuser section). The number of joints of the side panels, volute plates, flange rings and angle steel rings of the casing shall be in accordance with the provisions of Table 4. Joint
Spiral plate splicing form I
Machine number ND
>12. 5～16
>16～20
>20～25
>25～28
The number of side plates includes the number of plates given in the drawing. 2Angle steel rings and flange rings are spliced ​​in equal parts.
5.2 Axial flow fan
5.2.1 Collector
JB/T 10214—2000
Volute plate splicing form I
Number of splicing blocks of main casing parts
Volute plate (n)
Flange ring
Angle steel ring
The collector formed by the tangency of a circular cylinder with a height greater than 100mm and the annular surface is allowed to have a circumferential weld at the tangent point (see Figure 6); the number of equally divided splicing blocks allowed in the circumferential direction shall be in accordance with the provisions of Table 5.
Girth welding
Figure 6 Joining of collectors
5.2.2 Rectifier
For a rectifier formed by tangent of a cylinder with a height greater than 100 mm and an ellipsoid (Figure 7) or sphere (Figure 8), a ring weld is allowed at the point of tangency; for spherical joining of rectifiers, a ring weld is allowed at the spherical crown, and the joining diameter of the spherical crown is 100~~300mm. The number of equally divided joining blocks allowed in the circumferential direction shall be in accordance with the provisions of Table 5.
Machine No.
>9～12. 5
>12.5～16
>16～20
>20～25
>25～28
5.2.3 Hub
Girth weld
Joining of rectifier body I
JB/T 10214--2000
Girth weld
Joining of rectifier body Sub
Number of equally divided pieces of collector and rectifier body
Current collector
Rectifier body
For hubs with a diameter greater than 1000mm, two or three pieces are allowed to be joined. The specific joining positions shall be as shown in Figure 9 or Figure 10. The circumference of cylindrical hub shell (Fig. 9) and spherical hub shell (Fig. 10) is allowed to be connected in accordance with Table 6, and the joints should avoid equally divided holes on the circumference. Spherical surface connection (600～1000mm) should be ≤3. Splicing of shaft disc
cylindrical hub shell
hub shell outer diameter
>600～~1 000
5.3 Requirements for welding quality of spliced ​​parts
Circular hub shell
Figure 10 Splicing of spherical hub
Hub shell circumference Allowable number of splicing blocks
Spherical hub shell
The welding quality of spliced ​​parts shall comply with the provisions of JB/T10213. 420
Circular hub shell
Spherical hub shell
Shortest length of splicing block
≥1/4 circumference
Manufacturing tolerances of samples and requirements for related No. materials 6
6.1 Manufacturing tolerances of samples
JB/T 10214—2000
The limit deviation of sample manufacturing of No. material samples shall not exceed 1/2 of the value of Class A deviation in Table 7. Table? The limit deviation of linear dimension is 2~30≥30~
≥400～
>1 000～
>2 000～
>4 000~～
>8 000～
>12 000~
>16 000~
12 000
The verticality tolerance of the vertical line or vertical edge of the sample with No. 2 material shall not exceed 1/2 of the E grade tolerance value in Table 8. The shape and position tolerance of riveted parts
≥120-
1000～
>2 000～~≥4 000~
≥8 000～≥>12 000~
The position tolerance of the sample plate used to determine the center of each connection hole shall not be greater than $0.5mm. 6.2 Inspection sample
6.2.1 The limit deviation of the inspection sample plate shall not exceed 1/4 of the value of the A-level code difference in Table 7. ±8
16 000~
20 000
6.2.2 The verticality tolerance of the vertical line or vertical edge in the inspection test piece shall not exceed 1/3 of the value of the E-level tolerance in Table 8. 6.3 Tolerance of the material line
6.3.1 The limit deviation of the material line shall not exceed 2/3 of the value of the A-level deviation in Table 7. 6.3.2 The verticality tolerance of the vertical line and vertical edge of the material shall not exceed 2/3 of the value of the E-level tolerance in Table 8. 6.3.3 The position tolerance of the "sample punch" in the center of the connecting hole shall not be greater than go.6mm. 6.4 Fiber direction of riveted materials
6.4.1 The bending line of the bent part shall be perpendicular to the fiber of the plate or the inclination angle α with the fiber shall be between 35° and 145° (see Figure 11). Bending line
Figure 11 Fiber direction of bending part material
>20 000
JB/T 10214-—2000
6.4.2 For extended parts (such as arc-shaped air inlets, wheel covers, etc.), the unfolded material is circular or fan-shaped larger than a semicircle, and the fiber direction of the material does not need to be considered; for fan-shaped smaller than a semicircle, the intersection angle α between the fan-shaped chord and the sheet fiber should be within the following range (see Figure 12); 90°90°
Where: β——the angle between the chord and the edge line. Bending line
Sector-shaped material chord
Figure 12 Fiber direction of extended part material
7 Blanking tolerance of riveted parts
7.1 Limit deviation of shearing of non-matching parts
7.1.1 The limit deviation of sheared parts shall not exceed the value of Class A deviation in Table 7. 7.1.2 The perpendicularity tolerance of the right-angled side of the sheared part shall not exceed the value of the F-grade tolerance in Table 8. 7.2 Gas cutting tolerance of non-matching parts
7.2.1 The limit deviation of the size of the gas-cut part shall not exceed the value of the B-grade deviation in Table 7.7.2.2 The perpendicularity tolerance of the right-angled side of the gas-cut part shall be 1.2 times the value of the F-grade tolerance in Table 8. 7.2.3 For all gas-cut parts that are not "machined", the outer edge shall be smoothly transitioned. Within the range of ≤500mm, there shall be no more than one convex or concave part caused by defects, and within the range of 500-1000mm, there shall be no more than two convex or concave parts. 7.3 Blanking tolerance of clearance-fit parts without tolerance indication7.3.1 For clearance-fit shaft parts, the lower deviation of blanking shall be according to the lower deviation of Class A in Table 7, and the upper deviation shall be zero. 7.3.2 For clearance-fit hole parts, the upper deviation of blanking shall be according to the lower deviation of Class A in Table 7. The upper deviation of Class B and the lower deviation are zero. 7.3.3 The upper deviation of the width of the volute in the casing is half of the upper deviation of Class A in Table 7; the lower deviation is the value of the lower deviation of Class A in Table 7.
7.3.4 The limit deviation of the fan blade size shall not exceed the value of the Class A deviation in Table 7. 7.3.5 The blanking tolerance of the circumference of the cylinder shall be equal to 0.8 times the product of the fitting tolerance of the cylinder and the circumference unit. 7.3.6 The verticality tolerance of the right-angled side of the mating part shall be in accordance with Class E in Table 8. 8.1.1 For non-matching parts that are not formed by bending, the manufacturing limit deviation is the same as that specified in 7.1 and 7.2. 8.1.2 For non-matching parts that are formed by bending, the limit deviation after forming shall be in accordance with Class B in Table 7. 8.1.3 For matching parts that are not formed by bending, the manufacturing limit deviation is the same as that specified in 7.3.1 and 7.3.2. 8.1.4 For hole parts that match the outer diameter of the cylinder, the manufacturing limit deviation is the same as that specified in 7.1 and 7.2. The upper deviation of the aperture is in accordance with the upper deviation of Class B in Table 7, and the lower deviation is zero; the lower deviation of the outer diameter of the cylinder is in accordance with the lower deviation of Class A in Table 7, and the upper deviation is zero. 8.1.5 For shaft parts that match the inner diameter of the cylinder, the lower deviation of the outer diameter is in accordance with the lower deviation of Class A in Table 7, and the upper deviation is zero; the upper deviation of the inner diameter of the cylinder is in accordance with the upper deviation of Class B in Table 7, and the lower deviation is zero. 8.1.6 The limit deviation of the throat diameter of the air inlet of the centrifugal fan shall not exceed ±0.6% of the size. 422
JB/T 10214— 2000
8.1.7 The limit deviation of the non-matching dimensions of the assembly shall be in accordance with Class C in Table 7. 8.1.8 The perpendicularity tolerance of the non-matching edges of the assembly shall be in accordance with Class G in Table 8. 8.1.9 The perpendicularity tolerance of the matching edges of the assembly shall be in accordance with Class E in Table 8. 8.1.10 The flatness tolerance of the normal closing surface of the assembly shall be in accordance with Class F in Table 8. 8.2 Form and position tolerances of riveted parts of centrifugal fans 8.2.1 The line profile tolerance of the blade profile shall be in accordance with Class F in Table 8, and the basic dimension is the blade arc length. 8.2.2 The line profile tolerance of the arc wheel cover shall be in accordance with Class F in Table 8, and the basic dimension is is the impeller diameter. 8.2.3 The line profile tolerance of the profile of the inlet arc surface shall be in accordance with Class F in Table 8, and the basic dimension is the inlet throat diameter. 8.2.4 The flatness tolerance of the single-piece side panel shall be in accordance with Class F in Table 8; the flatness tolerance of the side panel after assembly into the casing shall be in accordance with Class G in Table 8. 8.2.5 The limit deviation of the blade inlet and outlet installation angle is ±1°. 8.2.6 The verticality tolerance of the blade outlet edge to the wheel shall be less than or equal to 1/100 of the blade outlet width. 8.2.7 The difference K value between the two pitches (chord lengths) of any three adjacent blades at the outlet end shall not exceed the provisions of Table 9. Table 9 Blade pitch difference K
Machine No
Note: NO is the corresponding machine number.
>10～20
>20～25
8.2.8 The flatness tolerance of the impeller disc before splicing shall be in accordance with Class E in Table 8; the flatness tolerance of the disc after assembly into the impeller shall be in accordance with Class G in Table 8.
8.2.9 The circular runout tolerance of the inner diameter of the impeller cover shall be less than or equal to half of the minimum single-sided clearance value between the impeller and the air inlet, and the circular runout tolerance of the impeller end face shall be in accordance with the provisions of Table 10.
Table 10 Impeller end face circular runout tolerance
Wheel disk end face circular runout
Wheel cover end face circular runout
200~400
Impeller diameter
>1 000~1 600|>1 600~2 500|>2 500~3 150j>3 150~5 000400~～1 000
8.3 Form and position tolerances of rivet welded parts of axial flow fans 4.0
8.3.1 The line profile tolerance of the blade profile shall not exceed 1/150 of the chord length of the measured blade section. The depth of scratches on the blade surface shall not be greater than 0.5 mm.
8.3.2 The deviation of the blade twist angle shall not exceed ±1°8.3.3 The difference K value between the pitch (chord length) of the two corresponding end points of any three adjacent blades at the outer circle shall not exceed the provisions of Table 11. Table 11 Blade pitch difference K
Impeller diameter
Number of blades
>1 250～>2 000～
1>3 150~
>5000~
8.3.4 The gap between the arc surface profile of the guide vane, collector, and rectifier and the measuring sample shall not be greater than 1/100 of the measured arc length.8.3.5 The runout tolerance of the impeller shall not exceed the provisions of Table 12. mm
Radial and end face runout of the hub
Radial runout of the impeller outer diameter
End face runout of the impeller outer diameter
JB/T 10214-2000
Table I2 Runout tolerance of impellers for axial flow fans Impeller diameter
>630～800
>800~1250>1250~2000>2000~31502.0
The installation angle deviation of the guide vane to the wind tube shall not be greater than +1°8.3.7
The limit deviation and form and position tolerance of the casing size shall not exceed the provisions of Table 13. Table 13 Dimensional deviation and geometric tolerance of casing
Inner diameter of cylinder without dimpling
Limit deviation
Flange rings at both ends
Parallelism tolerance
Inner diameter roundness tolerance
[≥1 250~
>2 000～
The radial runout tolerance of the unprocessed outer diameter of the hollow transmission shaft shall not exceed the provisions of Table 14. Radial runout tolerance of hollow transmission shaft
Outer diameter
Radial runout
≥>200～300
>3150～
>3150～5000
>5000～
For connectors used by users, the position tolerance of the connecting hole shall be less than or equal to 1.5mm. Riveting quality requirements
The clearance of riveted parts shall not be greater than 0.1mm within the range of two times the rivet diameter, and shall not be greater than 0.3mm in other parts. 9.2 The rivet head shall be smooth and flat, and the depth of local scratches shall not be greater than 0.4mm. 9.3 Loose rivets are strictly prohibited.
Other requirements for riveting quality shall be in accordance with the provisions of Table 15. 9.4
Quality requirements for bolted connection
>8 000
10.1When the fan impeller disk (or middle disk, hub plate) and the hub (or shaft flange) are connected by bolts, the clearance of the matching surface shall not be greater than 0.1mm within the range of two times the bolt diameter, and shall not be greater than 0.3mm in other parts. 10.2When two machined surfaces are matched, the matching clearance shall not be greater than 0.05mm within the range of two times the bolt diameter, and shall not be greater than 0. 15mm in other parts.
10.3The nuts shall be tightened evenly, and anti-loosening measures shall be taken. 424
Nail head not pressed
Upper riveted part
Nail head biased
Upper riveted part
Nail head crack
Nail head periphery
Head axis
Line displacement
Nail head appears
JB/T 10214 - 2000
Table 15 Riveting quality requirements
Quality requirements and
Limit deviation
Not allowed
Not allowed
Not allowed
Nail head is too small
Nail head edge
Parent material is
Nail head is tilted
Countersunk head is too low
Countersunk head is not complete
Countersunk head is too high
Quality requirements and
Limit deviation
b≤0. 04 d
b≤0.03 d
a≤0. 05 d
b≤0. 05 d
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