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JY/T 0308-2019 English PDF

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JY/T 0308-2019: Geometrical models for the primary school
Status: Valid

JY/T 0308: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JY/T 0308-2019English199 Add to Cart 3 days [Need to translate] Geometrical models for the primary school Valid JY/T 0308-2019
JY 0308-1991English199 Add to Cart 2 days [Need to translate] Specification of geometrical model for the primary school Obsolete JY 0308-1991

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Basic data

Standard ID JY/T 0308-2019 (JY/T0308-2019)
Description (Translated English) Geometrical models for the primary school
Sector / Industry Education Industry Standard (Recommended)
Classification of Chinese Standard Y51
Word Count Estimation 8,853
Date of Issue 2019-04-08
Date of Implementation 2019-09-01
Older Standard (superseded by this standard) JY 0308-1991
Regulation (derived from) Natural Resources Department Announcement No. 7 of 2019
Issuing agency(ies) Ministry of Education of the People's Republic of China

JY/T 0308-2019: Geometrical models for the primary school

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Primary school geometry model) ICS 03.180 Y 51 Education Industry Standard of the People's Republic of China Replacing JY/T 0308-1991 Elementary Geometric Shape Model Geometrical models for the primary school 2019-04-08 release 2019-09-01 Implementation Published by the Ministry of Education of the People's Republic of China JY

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces JY/T 0308-1991 "Technical Conditions for Primary School Geometry Model". Compared with JY/T 0308-1991, except for editing The main technical changes outside the sexual modification are as follows. -Modified the standard name; -Added normative references (see Chapter 2); -Added relevant technical requirements for students' geometric shape models and dimensions (see 4.1.1, 4.1.2 and Table 1); -Increased the types of cuboids and cones (see Table 1); -Added balls and triangular prisms (see 4.1.1); -Added requirements for model size errors (see Table 1); -Added safety requirements and test methods (see 4.5 and 5.7); -Added defect classification of product technical indicators (see 6.2). Please note that some elements of this standard may involve patents. The issuer of this standard is not responsible for identifying these patents. This standard is proposed by the Basic Education Department of the Ministry of Education of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Educational Equipment Standardization Technical Committee for Children and Preschool Education (SAC/TC 125/SC6). This standard was drafted. Educational Equipment Research and Development Center of Ministry of Education, Anhui Zhuangyuanlang Electronic Technology Co., Ltd., Hefei Yunlianhong Da Information Technology Co., Ltd. The main drafters of this standard. Zhu Xiaocui, Dang Jianwei, Jin Lin, and Jiang Zhimou. This standard replaces JY/T 0308-1991. The release of previous versions of this standard instead of the standard is as follows. --JY/T 0308-1991. Elementary Geometric Shape Model

1 Scope

This standard specifies the classification and naming, technical requirements, test methods, inspection rules, signs, instructions, Packaging, transportation and storage. This standard applies to non-metal materials made of geometric shapes for primary school teaching.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to the document. For undated references, the latest version (including all amendments) applies to this document. GB/T 1800.2-2009 Geometrical Product Specifications (GPS) Limits and Fits Part 2 Standard Tolerance Grades and Hole and Shaft Limit Deviations Difference table GB/T 1931-2009 Wood moisture content determination method GB 6675.1-2014 Toy Safety Part 1. Basic Specifications GB 6675.2-2014 Toy safety Part 2. Mechanical and physical properties GB 6675.4 Toy Safety Part 4. Migration of Specific Elements GB/T 22048 Determination of specific phthalate plasticizers in toys and children's products JY/T 0001-2003 General quality requirements for teaching instruments and equipment products JY/T 0002-2003 Inspection rules for teaching instruments and equipment products JY/T 0026-1991 teaching instrument and teaching equipment product model naming method JY/T 0213-1994 Teaching instrument mechanics, thermal instrument transportation, storage environmental conditions and experimental methods

3 Classification and naming

3.1 Classification Products are divided into two types for teachers and students. 3.2 Naming rules and methods 3.2.1 Nomenclature shall be in accordance with the provisions of JY/T 0026-1991. 3.2.2 The naming of the primary geometry model is. U ― XJHXT ― J/X ― n Product specifications, number of model types Product use code, for teachers or students (J or X) Product name Pinyin prefix, "small (learning) geometry" Product model classification code Model example. U-XJHXT-X-9. 9 geometric models for elementary school students.

4 Technical requirements

4.1 Composition and dimensions 4.1.1 The elementary geometry model of elementary school shall include at least. general cuboid, special cuboid, cube, solid cylinder, hollow cylinder, Cone (3 pieces), spheres and triangular prisms (2 pieces) and general cuboids, special cuboids, cubes, solid cylinders material. 4.1.2 The cross section of a triangular prism is a general triangle. Two triangular prisms can be combined into a quadrangular prism whose cross section is parallelogram. The color should be the same color. 4.1.3 The external dimensions of various models shall be in accordance with Table 1. Table 1 Dimensions of Primary School Geometry Model Units in mm Model name size Dimensional error Teachers and students cuboid Cuboid Length 140 60 Should conform to GB/T 1800.2-2009 Requirements, standards Tolerance grade is IT16 level Width 100 30 High 60 10 Special cuboid Length 140 60 Width 60 60 High 60 10 Cuboid edge length 100 30 Cylinder Solid cylinder Bottom diameter 60 30 High 100 60 Hollow cylinder Outer diameter 100 60 ID 61 31 High 100 60 Cone Bottom diameter 100 60 High 100 60 Bottom diameter 60 30 Height 140 60 Bottom diameter 60 30 High 100 50 Ball diameter 100 30 Triangular prism Section triangle longest side 100 60 High 100 60 4.2 Straightness, Verticality and Roundness 4.2.1 The straightness tolerances of the edges of the cuboid, the edges of the cube, the cylinder bus, and the cone bus shall not be greater than 1 mm. 4.2.2 The perpendicularity tolerance between the adjacent edges of the cuboid, the adjacent edges of the cube, the end face of the cylinder and the generatrices shall not be greater than 1.5 mm. 4.2.3 The circularity tolerance of the end face of the cylinder and the bottom face of the cone should not be greater than 1 mm. 4.3 Cylinders and cones 4.3.1 The height of the solid cylinder and the hollow cylinder shall be equal, and the height difference between the two shall not be greater than 1.5 mm. 4.3.2 A solid cylinder shall fit within a hollow cylinder, and its maximum clearance shall not be greater than 2 mm. 4.3.3 The heights of the two equal-height cones shall be equal, and the height difference between the two shall not be greater than 1.5 mm. 4.4 Surface Area Demonstration Materials General cuboids, special cuboids, cubes, and solid cylinders should be attached to the surface area to demonstrate the material, and the surface areas of each geometric body should be expanded The demonstration material should completely match the external surface of the corresponding geometry. The difference between the two should not be greater than 1.0 mm 4.5 Appearance and workmanship 4.5.1 Each surface of the model shall be flat, without obvious defects such as depressions, bulges, etc .; the color shall be clear and coordinated, without cracks, burrs and deformation. 4.5.2 The model should not have external defects that affect teaching. Others should conform to the general requirements for models 9.1, 9.3, and 9.4 in JY/T 0001-2003 begging. 4.5.3 Plastic parts shall meet the appearance requirements for plastic parts in 7.7 of JY/T 0001-2003. 4.5.4 The wooden parts should be wood without knots and degreased and dried. The moisture content should meet the requirements of 6.28 in JY/T 0001-2003. The exterior of wooden parts is painted with a smooth and uniform paint layer, which meets the requirements for the appearance of the paint layer in 7.4.3 of JY/T 0001-2003. 4.6 Security 4.6.1 All exposed accessible parts of the instrument shall not have dangerous sharp edges and tips that may cause harm to humans. Sharp edges, The corners should be chamfered and rounded. 4.6.2 The chemical substances exposed to the materials used in the product after normal use and after abuse tests should not have a negative impact on human health, It shall meet the requirements of 5.3.1, 5.3.2, 5.3.3 and 5.3.7 in GB 6675.1-2014. 4.7 Environmental test 4.7.1 Plastic products shall be subjected to a temperature test in accordance with 3.1 of JY/T 0213-1994. 4.7.2 Wooden products shall be tested for humidity according to 3.1 of JY/T 0213-1994.

5 Test method

5.1 Dimensions 5.1.1 The model and the surface area of the geometric body are expanded to demonstrate the dimensions of the material. Caliper measurement should meet the requirements of Tables 1 and 4.4. 5.1.2 The height of both solid and hollow cylinders shall be measured with a vernier caliper with a division value of 0.02 mm. The difference shall be in accordance with 4.3. Requirements. 5.2 Verticality 5.2.1 The verticality of the adjacent edges of the cuboid and the cube shall be tested with a square and feeler on the platform. The results shall meet the requirements of 4.2.2. 5.2.2 The perpendicularity between the end faces of solid cylinders and hollow cylinders and the generatrix is measured with a square and feeler on the platform, and measured in different directions. 4 Second, the maximum value shall be taken, which shall meet the requirements of 4.2.2. 5.3 Straightness 5.3.1 The straightness of each edge of the cuboid and cube shall be tested with a double-slope flat ruler or platform and feeler. The results shall meet the requirements of 4.2.1. 5.3.2 The straightness of the cylinder generatrix shall be tested with a double-slope flat ruler or platform and feeler gauge. The results shall meet the requirements of 4.2.1. 5.3.3 The straightness of the cone generatrix shall be tested with a double-slope flat ruler or platform and feeler gauge, and the results shall meet the requirements of 4.2.1. 5.4 Roundness 5.4.1 The circularity of the end face of the cylinder is measured with a vernier caliper crossing the diameter from different directions, and the number of measurements is not less than 4 times, and its maximum and minimum The difference in values shall meet the requirements of 4.2.3. 5.4.2 The circularity of the bottom surface of the cone is measured with a vernier caliper from different directions. The number of measurements is not less than 4 times. The difference between the maximum and minimum values. Should meet the requirements of 4.2.3. 5.5 Maximum gap between a solid cylinder and a hollow cylinder Insert the solid cylinder into the hollow cylinder, mark the upper and lower end faces of the solid cylinder and the hollow cylinder, respectively, and take out the solid cylinder Body, use a vernier caliper to measure the diameter of the solid cylinder and the inner diameter of the hollow cylinder. The maximum diameter of the cylinder and the minimum diameter of the solid cylinder. Then the upper and lower ends of the solid cylinder and the upper and lower ends of the hollow cylinder are respectively grouped The calculated maximum gap value shall meet the requirements of 4.3.2. 5.6 Wood moisture content Wood products shall be tested for moisture content of wood according to Chapters 5 and 6 of GB 1931-2009, and the results shall meet the requirements of 4.5.4. 5.7 Security 5.7.1 Accessible exposed dangerous sharp edges and tips shall be tested in accordance with 5.8 and 5.9 of GB 6675.2-2014, respectively. 5.7.2 The transportable elements in the materials used in the product shall be tested in accordance with the method of GB 6675.4. The test results shall meet the requirements of 4.6.2. 5.7.3 The phthalate plasticizer in the materials used in the product shall be tested in accordance with GB/T 22048. The test results shall meet the requirements of 4.6.2. 5.8 Appearance and technology Sensory test. 5.9 Environmental test 5.9.1 Plastic products shall be tested in accordance with 4.1 of JY/T 0213-1994. The tested samples shall meet all technical requirements. 5.9.2 The wood products shall be tested in accordance with 4.2 of JY/T 0213-1994. The tested samples shall be able to meet all technical requirements.

6 Inspection rules

6.1 Inspection classification Product inspection is divided into factory inspection, type inspection and quality supervision inspection. 6.2 Inspection items and inspection methods The inspection items, inspection methods and defect classification of factory inspection and type inspection shall be in accordance with Table 2. Quality supervision inspection shall refer to type inspection. Table 2 Inspection items, inspection methods, and defect classification of factory inspection and type inspection Serial number inspection standard provisions factory inspection type inspection defect classification 1 Composition 4.1.1 ● ▲ A 2 Dimensions 4.1.3, 4.4 ● ▲ A 3 Straightness 4.2.1 ○ ▲ B 4 Verticality 4.2.2 ○ ▲ B 5 Roundness 4.2.3 ○ ▲ B 6 Height difference 4.3.1, 4.3.3 ● ▲ A 7 Cylinder clearance 4.3.2 ● ▲ A 8 Wood moisture content 4.5.4 ○ ▲ A safety Sharp edges and tips 4.6.1 ○ ▲ A 10 Material safety 4.6.2 ○ ▲ A 11 Other appearance 4.5 ○ ▲ B 12 Environmental Test 4.7-▲ A Note. "●" in the table means full inspection for batch products, "○" means sample inspection for batch products, "-" means no inspection items, "▲" Indicates items to be inspected 6.3 Lot rules and sampling methods 6.3.1 The factory inspection shall be batched according to the natural batch of delivery, and the type inspection shall be batched according to the stock array. 6.3.2 When leaving the factory for inspection, inspect all the inspection items first, take samples from the qualified products of all inspection items, and inspect the items for sampling inspection. 6.3.3 The samples for type inspection shall be taken from the products that passed the factory inspection. 6.3.4 The sampling methods for factory inspection and type inspection shall be in accordance with the relevant provisions of JY/T 0002. 6.4 Non-conformance determination 6.4.1 The failure criterion of a single sample shall be implemented in accordance with 4.3 of JY/T 0002-2003. 6.4.2 In Table 3, "A" is the main technical index, and "B" is the non-main technical index. 6.5 Review rules 6.5.1 Unqualified batches and products can be submitted for re-inspection after rework. 6.5.2 If the cause of the batch disqualification is a sampling inspection item, the item shall be fully inspected during the re-inspection. 6.6 Quality supervision inspection Refer to type inspection. 7 Signs, instructions, packaging, transportation and storage Product marking, packaging, transportation, storage, and use instructions shall be in accordance with the provisions of Chapters 11 and 12 of JY/T 0001-2003.

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