JB/T 7871.1-1999 JB/T 7871.1-1999 General-purpose and plough-type paddy field plow body JB/T7871.1-1999 Standard download decompression password: www.bzxz.net

ICS65.060.20
Machinery Industry Standard of the People's Republic of ChinawwW.bzxz.Net
JB/T7871.1~7871.4-1999
General-purpose and lift-throwing type paddy field plow
General-purpose and lift-throwing type Moldboard ploughs for paddy field-bottow
1999-09-17 Issued
National Machinery Industry Bureau
2000-01-01 Implementation
Machinery Industry Standard of the People's Republic of China
General-purpose and lift-throwing type moldboard ploughs for paddy field-bottow
General-purpose and lift-throwing type moldboard ploughs for paddy field-bottow
JB/T7871.1-1999
Replaces JB/T7871.1-95
This standard specifies the types and basic parameters, technical requirements and acceptance rules of general-purpose and lift-throwing type moldboard ploughs for paddy field. This standard applies to general-purpose and lift-throwing type moldboard ploughs for paddy field. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of this standard, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest version of the following standards. GB/T14225.1—1993
JB/T7871.2-1999
JB/T7871.3—1999
JB/T7871.4—1999
Types and basic parameters
Chinese plow types and basic parameters
Universal type, Shenbao type paddy field plow wall Universal, Chuanbao type water Field plow type plow type universal type, Shen type paddy field plow type
Inner side plate
Universal paddy field plow type body as shown in Figure 1, type code with T-20, T-25 said, basic parameters should meet the requirements of Table 1 Table 1 basic parameters of body
Design tillage depth acm
Design tillage width bcm
T. Width of work b, cm
Starting element line angle 9.
Height of horizontal base surface of plow body to plane of column H
Theoretical distance from plow tip to symmetric center axis of four mounting holes of plow column on projection on longitudinal vertical plane Lmm
500.550.600
3.2T-20, T-25 body working surface and sample curve should meet the requirements of Figure 2~Figure 5. T-25
3.3 For the type, basic parameters, type T. surface and sample curve of Ts-20 general-purpose bar paddy field type and C-25 rate fort paddy field type, please see Appendix A (suggestive appendix)
Approved by the State Machinery Industry Bureau on September 17, 1999 and implemented on January 1, 2000
1-Type front; 2-plow wall; 3-plow column; 4-plow support: JB/T7871.1-1999
5-Type side plate: 6-Extension plate: 7-Support rod: 8-Slippery board Figure 1 General type||t t||Figure 2 T-20 body. T. curved surface
JB/T7871.1—1999
Figure 3 T-25 plow body T. curved surface
JB/T7871.11999
Figure 4 T-20 plow body sample curve
Figure 5 T-25 body sample curve
4 Technical requirements
JB/T7871.1-1999
4.1 The plow body shall comply with the requirements of this standard and be manufactured in accordance with the product drawings and technical documents approved by the prescribed procedures. 4.2 The wall shall comply with the provisions of JB/T7871.2. The plow shall comply with the provisions of JB/T7871.3. The side plate shall comply with the provisions of JB/T7871.4. The plow column shall comply with the relevant provisions of GB/T14225.1. 4.3 The working surface at the joint of the plowshare and the plow wall should have a smooth transition. The plow wall shall not be higher than the plow. The mold is allowed to be higher than the plow wall, but within the two-thirds of the joint range from the cavity edge, the mold plow shall not be higher than the plow wall by more than 2.5mm. For the combined mold wall, the rear plow wall shall not be higher than the front plow wall. The front plow wall is allowed to be higher than the rear mold wall, but not more than 2mm. At the edge of the cavity edge, the plow wall shall not protrude from the plowshare. The mold plow is allowed to protrude from the plow wall, but not more than 4mm. The gap at the joint of the mold plow and the mold wall shall not be greater than 1mm within the two-thirds range from the shank edge. The gap at the joint of the front mold wall and the rear mold wall shall not be greater than 1.5mm.
4.4 The heads of the fastening bolts on the mold plow and the plow wall shall not protrude from the working surface. It is allowed to be concave, but not more than 1mm4.5' The following inspections shall be carried out when the mold body is in working condition: 4.5.1 The limit deviation of the plow body width is ±3% of the designed plow width. 4.5.2 The straight part of the plow blade edge should be on the horizontal base surface of the plow body. The rear end of the plow blade is allowed to be higher than the horizontal base surface, but the plow body with a width of 20 cm shall not be greater than 5mm, and the plow body with a width of 25 cm shall not be greater than 6mm. 4.5.3 The lowest point of the chisel part of the chisel plowshare shall be lower than the horizontal base surface of the plow body, and its limit deviation is ±30% of the design value. 4.5.4 Use the integral sample group to check the body curved surface perpendicular to the plow blade. The local gap between the sample and the body curved surface shall comply with the provisions of Table 2. During the inspection, the reference plane of the integral sample group is perpendicular to the horizontal base surface of the plow body, and its limit deviation is ±1°. The sample group is allowed to move along the plow blade direction but shall not exceed ±2mm.
The sample plates that make up the integral sample group should be evenly distributed, and each sample area shall not be less than 10000. The sample area division shall be in accordance with Figures 6 and 7. 4.6 The plow, plow wall and the support shall fit together, and their local gap shall not be greater than 2mm. However, the gap should be eliminated at the bolt connection. Table 2 Local gap allowed on the curved surface of the plow body
Body width
Note: See Figure 2 and Figure 3 for the sample number.
Sample area
Sample number
Local gap mm
Acceptance rules
JB/T7871.1-1999
20cm width of plow body sample area
Figure 7 25cm width of body sample area
The body must be inspected and qualified by the quality inspection department of the manufacturer before it can be assembled or shipped out of the factory. 5.1
5.2 The ordering unit can conduct random inspections on the body according to this standard, and the number of random inspections shall be negotiated by both parties. If there are unqualified results in the random inspection, double the number of bodies shall be sampled for re-inspection. If there are still unqualified ones, they will not be accepted. Marking and Packaging
The working surface of the mold body should be coated with rust-proof agent.
6.2 When the mold body leaves the factory, the packaging should be firm. The blade part should be protected. 6.3 Each package should be accompanied by the following documents and markings: a) Plough body code and quantity;
b) Quality inspection certificate;
c) Factory batch number;
d) Manufacturer's name.
JB/T7871.11999
Appendix A
(Suggestive Appendix)
Rate-fort type, universal bar paddy field plough body A1Ts-20 universal bar paddy field type and C-25 fort paddy field plough, the plough body type and basic parameters are shown in Figure AI, Figure A2 and Table A1A2Ts-20 and C-25 paddy field type body T. The construction surface and sample curve are shown in Figure A3~Figure A6. S
1-type; 2-front plow wall; 3-cabinet strip; 4-plow column; 5-plow support; 6-plow side plate: 7-support rod; 8-slippery board Figure A!Ts-20 type body
JB/T ·7871.11999
1-type: 2-front plow wall: 3-rear plow wall; 4-plow column; 5-plow support; 6-plow side plate Figure A2C-25 plow body
Designed plowing depth acm
Designed plowing width bcm
T. Working width b, cm
Starting element line angle 9.
Plough body horizontal base to plow column.1: plane height Hmm
The distance from the theoretical tip to the symmetrical center axis of the four mounting holes of the plow column on the longitudinal vertical plane.1: projection L
JB/T7871.1-1999
Ts-20, C-25 body basic parameters
Ts—20
500，550，600
Figure A3Ts—20 body curved surface
JB/T7871.11999
Figure A4C-25 body curved surface
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