GB/T 24675.4-2021Conservation tillage equipment—Part 4: Disc harrow (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1. Structure and Drafting Rules of Standardization Documents" drafted.

This document is part 4 of GB/T 24675 "Conservation tillage machinery". GB/T 24675 has published the following parts.

--- Part 1. Shallow loosening machine;

--- Part 2. Subsoilers;

--- Part 3. Spring tines;

--- Part 4. Disc harrows;

--- Part 5. Stubble crushing and returning machine;

--- Part 6. Straw crushing and returning machines.

This document replaces GB/T 24675.4-2009 "Conservation tillage machinery disc harrow". Compared with GB/T 24675.4-2009, except In addition to structural adjustments and editorial changes, the main technical changes are as follows:

a) An example of model preparation is added (see Chapter 4, Chapter 4 of the:2009 edition);

b) The requirements for ploughing depth have been added (see Table 2, Table 2 of the:2009 edition);

c) Changed the requirements for reliability in use (see Table 3, Table 3 of the:2009 edition);

d) The technical parameters and size requirements of the rakes are added (see 5.1.2);

e) Added the application of new materials for rake blades (see 5.5.1, 5.1.7 of the:2009 edition);

f) A new process for welding tungsten carbide wear-resistant material on the blade edge is added (see 5.5.2);

g) The requirements for the control system of the folding disc harrow are added (see 5.5.4);

h) Added technical requirements for hydraulic system (see 5.5.5);

i) The requirements for pressure test and oil cylinder of hydraulic oil circuit system are added (see 5.6.2);

j) Added fasteners and tightening torque requirements (see 5.6.5);

k) Added safety requirements for folding wide disc harrows (see 5.4.2, 5.4.4);

l) The preparation and test conditions before the test are added (see Chapter 6 of 6.1.1,:2009 edition);

m) Changed the reliability test method (see 6.2, 6.3 of the:2009 edition);

n) Changed the classification of inspection items (see Table 4, Table 4 of the:2009 edition);

o) Changed the inspection sampling judgment (see Table 5, Table 5 of the:2009 edition).

Introduction

The core content of conservation tillage is to implement no-tillage or less tillage, reduce the intensity and frequency of tillage on the soil as much as possible, and use the residues of crop residues.

Stubble mulch protects the surface, and at the same time supports the corresponding agronomic cultivation techniques to protect the output capacity of the natural function of the soil. for reforming traditional agricultural It is of great importance to improve agricultural production methods, improve drought resistance, increase farmers' income, improve ecological environment, promote sustainable agricultural development, and protect land resources. strategic significance and far-reaching historical significance. It has been widely popularized in my country, and the realization of conservation tillage is inseparable from agriculture that conforms to agronomy The technical support of the equipment requires the cooperation of agricultural equipment with different operating conditions and performance, so the protective equipment is composed of different types of operations. Farming standard system.

GB/T 24675 consists of the following parts.

--- Part 1. Shallow loosening machine;

--- Part 2. Subsoilers;

--- Part 3. Spring tines;

--- Part 4. Disc harrows;

--- Part 5. Stubble crushing and returning machine;

--- Part 6. Straw crushing and returning machines.

This document is part 4 of GB/T 24675, aiming at the characteristic that a large amount of straw is covered on the land after conservation tillage is harvested.

The technical requirements and test evaluation methods of disc harrows for conservation tillage are given in the field preparation, which provides a standard basis for the manufacture and product upgrading of disc harrows. Conservation tillage machinery part 4. disc harrows

1 Scope

This document specifies the model preparation, technical requirements, test methods, inspection rules, and delivery, marking, packaging, transportation of disc harrows for conservation tillage Loss and storage.

This document applies to the protective tillage disc harrow (hereinafter referred to as the disc harrow) matched with the tractor.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.

GB/T 1593 Agricultural wheeled tractor rear mounted three-point hitch 0, 1N, 1, 2N, 2, 3N, 3, 4N and 4 categories

GB/T 2828.1 Counting Sampling Inspection Procedure Part 1. Lot-by-Lot Inspection Sampling Plan Retrieved by Acceptance Quality Limit (AQL)

GB/T 3077-2015 Alloy Structural Steel

GB/T 3098.1-2010 Mechanical properties of fasteners Bolts, screws and studs

GB/T 3098.2-2015 Fasteners Mechanical Properties Nuts

GB/T 3766 General rules and safety requirements for hydraulic transmission systems and their components

GB/T 5667 Agricultural Machinery Production Test Method

GB/T 9480 Agricultural and Forestry Tractors and Machinery, Lawn and Gardening Power Machinery Operating Instructions Compilation Rules

GB 10395.1 Agricultural and Forestry Machinery Safety Part 1. General

GB 10396 Agricultural and Forestry Tractors and Machinery, Lawn and Garden Power Machinery Safety Signs and Hazard Graphics General

GB/T 13306 Signs

JB/T 5673-2015 General technical conditions for painting of agricultural and forestry tractors and implements

JB/T 5994 General technical requirements for assembly

JB/T 6279 Disc harrow

JB/T 8574 Agricultural Machinery Product Model Compilation Rules

JB/T 9832.2 Determination method of paint film adhesion performance of agricultural and forestry tractors and implements Press cutting method

JB/T 10205 Hydraulic cylinder

3 Terms and Definitions

The following terms and definitions apply to this document.