JB/T 5397-1991 Simplified graphic representation of roller chain and sleeve chain
Some standard content:
Machinery Industry Standard of the People's Republic of China
Predigest notation for the figures of roller and bush chains Subject content and scope of application
JB/T 5397 --91| |tt||This standard specifies the assembly drawings, parts drawings, component drawings and Graphical representation of roller chain conveyor accessories. This standard applies to product drawings and technical documents of roller chains and sleeve chains. 2 Reference standards
GB 4457.4
Mechanical drawing
Drawing line
GB4458.1
GB1458.2
Mechanical drawing||tt ||Mechanical drawing
GB 4458. 4
Mechanical drawing
3 symbols
Drawing method
The serial numbers of parts and components in assembly drawings and their Arrangement method and dimensioning method
3.1 Chain plate shape symbols (straight-edge chain plates are not marked with symbols), rivet head form symbols, chain plate edge symbols, and 45° chamfer symbols are as specified in Table 1. Table 1
chain plate shape symbol
shape chain plate
dumbbell-shaped chain plate
c
d
pressure riveting||tt ||Round rivet
Rivet head form symbol
3.2 Marking method
3.2.1 Chain plate shape symbol marking can take the following two forms: a.
Use the finger Line annotation (Fig. 1a).
hr
fr
is marked with the part sequence number (Figure 1b). Suitable for assembly drawings and component drawings. b.
3.2.2 The rivet head form symbol can be marked on the end of the pin in the top view (Figure 1c). 3.2.3 The chain plate edge symbol should be written before the edge size number (Figure 1d). Chain plate edge symbol
bs
45° chamfer symbol
3.2. The 445° chamfer symbol should be written before the chamfer size number (Figure 1e). The marking of non-45° chamfers should be in accordance with current standards. Approved by the Ministry of Mechanical and Electronic Industry of the People's Republic of China on June 25, 1991
Implemented on July 01, 1992
4 Basic Requirements
IB/T5397
1.5×30| | tt | 4.1
stream.
4.2
Vertical dimensions in graphics are allowed to be written in water notation (Figure 2). 4.3 When it does not cause misunderstanding, the dimension line is not allowed to draw the terminal form of the dimension line (Figure 2) . 4.4 When the figure is symmetrical and the measurement datum does not cause misunderstanding, single dimension line marking is allowed (Figure 2). 4.5 All axes and center lines of symmetry are allowed to be thin solid lines (Figure 1). 4.6 It is allowed not to draw the section symbol on each section and section view (Figure 5). 4.7 Tolerances, geometric tolerances, surface roughness, etc. in the drawings should be marked in accordance with the relevant standards. The simplified drawings should be marked with geometric tolerances and surface roughness. 5 Assembly drawing
5.1 The main view should draw two continuously assembled chain links (inner link and outer link), and at the same time, one connecting link and one transition link (composite transition link) should be drawn. links (if the chain is equipped with accessories, the number of links should be appropriately increased). 5.2 The chain plate in the front view is allowed to be drawn in a straight-edge shape. Non-straight-edge chain plates, such as chain plates and dumbbell-shaped chain plates, should be marked with the symbols specified in Table 1 (Figure 2, Figure 3, front view, Table 1).
5.3 The cotter pin (or circlip) of the locking part should be drawn schematically (Figure 2 and Figure 3 of the locking part). 5.4 The top view should adopt the schematic drawing method, and the thickness of the thick line should be selected between 0.7 and 2mm (top view in Figure 2 and Figure 3). 5.5 The top view of a multi-row chain should use the lateral disconnection method. The interruption line is allowed to be represented by a double-dot dash line (Figure 2. Figure 3c multi-row). The row spacing force of the pin length 6 corresponding to the number of rows: should be Use a table below the corresponding figure (see Table 2). Table 2
Number of rows (n)
4
mn
5397
91
5.6 In the top view, the inner side of the chain plate or The outer side is the dimensions measured by the measurement datum, 2, and 3. The following two methods can be used to mark the dimensions. There should be a gap of no less than 0.7mm between the lines. a) Single row
b) Double row
c) Off-row
Figure 2 Roller chain assembly diagram
JB/T 5397--91||tt| | | |tt | The length of the parallel line segment between the thick solid lines shall not be less than 2nm (Figure 42) Method 2: Move the mark within the graphic, and the length of the line segment of the extension line shall not be less than 3mm (Figure 4b). 5.7 Marking of pin dimensions
a)
JB/T5397-
Figure 4
a. The measurement datum is at the end of the pin (dimension bt in Figure 4). b. The measurement datum is on the pin axis (dimension p in Figure 4) -9
h)
5.8 When drawing the main view, a top view of the corresponding row number should be drawn. If there is no need to draw a single row When looking at the top view of the chain, move the dimensions b, b, and bad to the double or multi-row top view and mark them. 5.9 Dimensions b, b2, ba, h4, bs~ in graphics are allowed to be drawn not to scale, and thin solid lines are drawn below the size figures that are not drawn to scale - horizontal lines (except for the dimensions at interruptions), but the entire Graphics should be coordinated and reasonable (Figure 2). 5.10 According to the specific requirements of the chain, it is allowed to increase or decrease the number of dimensions. 6 Part drawings
6.1 Table drawings are allowed for parts of the same type. The same dimensions in parts of the same type are marked on the drawings. Different dimensions are marked in tables. The part drawing number and single piece should be indicated in the table. Quality (Figure 5 ~ Figure 9. Table 3 ~ Table 7). 6.1.1 The chain plate (including outer, middle, inner and connecting chain plates) only draws the outer link plate graphic (Figure 5, Table 3), and the shape of the chain plate is drawn according to the actual selected shape. If the middle link plate uses a straight-edge chain plate, the mid-link plate graphics should be drawn separately. h】
Figure 5
Table 3
Part drawing number
Gy
Part name
Outer link plate
Middle chain plate
Inner chain plate
Connecting chain plate
D
mm
Single piece mass kg~
JB/T 5397 --- 91
6.1.2 Transition chain plates (including circular holes, multi-row chains, and special-shaped hole transition chain plates) only draw the special-shaped hole transition chain plate graphics (Figure 6, Table 4). d
2
(h,)
Figure 6
Table 4
Part drawing number
Part name
Circular hole transition chain plate
Yi-shaped hole transition chain plate
Multi-row chain transition chain plate
B
6.1.3 pins (including single, double, Multi-row pins) only draw the single-row pin graphics (Figure 7, Table 5), 2-R××
(or 2-C× x
Figure 7
Table 5 | | tt | ||5
mm
Single piece mass kg
mm
Single piece mass kg
65
JB/T 5397-- 91
6.1.4 Connecting pins (including single, double, and multi-row connecting pins) only draw the single-row connecting pin graphics (Figure 8, Table 6) 2—H
x.
or 2-(
Figure 8
Table 6
Part drawing number
row
(n)
Note: The maximum geometric tolerance straightness requirement value R
6.1.5 Transition pins (including single, double, and multi-row transition pins) only draws the single-row transition pin graphics (Figure 9, Table 7 )·R×X
or 2-
part drawing number
row
C×
Number
()
Note: The table shows the geometric tolerance straightness requirement value 6.2. If no process arc, rounding or chamfering is drawn, the prescribed symbols should be used (Figure 10). 66bZxz.net
h..
Intm
Single piece mass kgα
mm
Single piece mass kg
JB/T 5397|| tt||6.3 Sets of simplified and rolled parts graphics are drawn according to Figure 10a and b. English
a) set
7 parts graphics
h) sub
Figure 10
91
Rx
(or 2-CX×)
c) Pin
hr
According to different assembly methods (joint assembly machine assembly or mold assembly), the components should be added accordingly in the product drawing Drawings and component drawings only need to mark dimensions related to assembly.
7.1 Inner link graphics (Figure 11),
Figure 11
7.2 Transition link graphics (Figure 12), other various forms of transition links should be drawn with reference to this graphics . Figure 12 | | tt | Draw the single-row outer link graphic (Figure 13, Table 8). Figure 13
Table 8
Number of rows (n)
k
Note: It is the required value of verticality of the geometric tolerance, mm
7.4 connection chain The graphics of links (including single, double and multi-row connecting links) can be in tabular form, and only the graphics of single-row connecting links are drawn (Figure 14, Table 9).
Figure
Table 9
Number of rows (n)
Note: , is the geometric tolerance interpolation trueness requirement value. 7.5 The graphics of detachable pins (including single, double, and multi-row detachable pins) can be tabular, and only the graphics of single row of detachable pins are drawn (Figure 15, Table 10). S8
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