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JY/T 0226-2019: Demonstrator solid contractility
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Demonstrator solid contractility
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JY/T 0226-2019
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Basic data | Standard ID | JY/T 0226-2019 (JY/T0226-2019) | | Description (Translated English) | Demonstrator solid contractility | | Sector / Industry | Education Industry Standard (Recommended) | | Classification of Chinese Standard | Y51 | | Word Count Estimation | 7,735 | | Date of Issue | 2019-04-08 | | Date of Implementation | 2019-09-01 | | Older Standard (superseded by this standard) | JY 226-1987 | | Regulation (derived from) | Natural Resources Department Announcement No. 7 of 2019 | | Issuing agency(ies) | Ministry of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 0226-2019: Demonstrator solid contractility---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.
(Solid shrinkage demonstrator)
ICS 03.180
Y 51
Education Industry Standard of the People's Republic of China
Replacing JY/T 226-1987
Solid shrink force demonstrator
Demonstrator solid contractility
Published on April 04,.2019
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 226-1987 "Solid Shrinkage Demonstrator". Compared with JY/T 226-1987, except for editorial changes
The technical changes are as follows.
-Increased the thickness of the base and the size of the U-shaped groove (see 4.4.1, 4.4.2);
-Added a positioning groove on the base for placing an alcohol tank (see 4.4.3);
-Added requirements for the outer face of U-shaped grooves (see 4.4.2);
-Increased the requirement that the stressed part in the test pin pin hole should be pointed (see 4.2);
-Increased the size of the alcohol tank and the requirements for the handle (see 4.6);
-Increased flatness requirements of the four sides of the base (see 4.4.1);
-Increased the distance between the bottom of the U-shaped groove and the upper surface of the base (see 4.4.2);
-Added transport tests (see 4.8);
-Deleted the dimensions and quality (see 1.3 and 1.4 of the 1987 version);
-Modified the description using adjectives (see 4.2, 4.3, 4.6, 2.2, 2.4, 2.5 of the 1987 version);
-Revised the requirements for rust prevention treatment on the surface of test rods (see 4.7.1, 2.1 of 1987 version)
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 (SAC/TC 125).
This standard was drafted. Education Technology Center of Zhejiang Province, Education Production and Supply Management Office of Fujian Province.
The main drafters of this standard. Zhao Hangsheng, Cai Shijian, Hu Xiaojie.
This standard replaces JY/T 226-1987.
The release of previous versions of this standard instead of the standard is as follows.
--JY/T 226-1987.
Solid shrink force demonstrator
1 Scope
This standard specifies the model designation, requirements, test methods, inspection rules, signs, instruction manuals, packaging,
Transportation and storage.
This standard is applicable to the solid shrink force demonstrator for teaching experiments.
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this document.
For undated references, the latest version (including all amendments) applies to this document.
GB/T 2828.1-2012 Counting sampling inspection procedure Part 1. Sampling plan for batch inspection inspection according to acceptance quality limit (AQL)
JY/T 0001-2003 General quality requirements for teaching instruments and equipment products
JY/T 0002 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 mechanics, thermal instrument transportation, storage environmental conditions and test methods
3 Model designation
3.1 Naming rules
The product is named according to the provisions of JY/T 0026-1991.
3.2 Model Nomenclature
The model of solid shrink force demonstrator is named.
F-GSL-T-16/350
Product specifications, shrink test bar (hereinafter referred to as test bar) size. diameter/length, unit. mm
Product feature code, iron
Product name Pinyin prefix, solid (body) contraction
Product model classification code, thermal instrument
Model example.
F-GSL-T-16/350. solid shrinkage demonstrator, made of iron, test rod diameter 16 mm, length 350 mm, special thermal instrument.
4 Requirements
4.1 Composition
The product consists of a test rod and handle, a base, a cast iron pin, and a special alcohol tank.
4.2 Test stick
The test rod shall be made of carbon structural steel, the diameter Φ 1 (see Figure 1, the same below) shall not be less than 16 mm, and the total length L1 shall not be less than 350 mm.
One end should be flat, the thickness B3 should be 12 mm ± 1 mm, the length L2 should be not less than 60 mm, and the diameter Φ 2 should be 6.3 mm to 6.5 mm
The other end of the bolt hole should be M16 thread, and the thread length L8 should not be less than 35 mm.
A sharp angle should be used for the stressed part in the bolt hole.
Note. This figure is for readability only. The handle of the alcohol tank is not shown in the picture
Figure 1 Main functional dimensions
4.3 Handle
The handle should be made of gray cast iron, the handle width L7 should not be less than 100 mm, M16 thread should be matched with the test rod, and the fit length L6 should not be
Less than 20 mm, the torque of rotating the thread should not be greater than 0.15 N · m.
4.4 Base
4.4.1 The base shall be made of gray cast iron, and the thickness H2 shall not be less than 10 mm. The flatness of the four sides of the bottom of the base should not be greater than 1 mm. Base
The U-groove columns should be set up at both ends for the test rods. The thickness of the column B1 is greater than 20 mm. The two columns should be strengthened in the opposite direction and should be reinforced.
Cast integrally with the base.
4.4.2 The width of the U-shaped groove on the base column shall be. the width of the end of the iron pin L9. 13 mm ～ 14 mm, the width of the end of the handle L12. 18 mm ～ 19 mm,
The depth H3 is 35 mm to 36 mm, and the length L5 is 30 mm ± 2 mm; the distance L4 between the outer faces of the two U-shaped grooves is 310 mm to 315 mm. Test stick
The distance L10 between the two contact points on the outside of the U-shaped groove should not be less than 30 mm.
The outer end of the column shall be flat, the planes of the two outer ends shall be parallel, and the parallelism shall not be greater than 2 mm. And perpendicular to the upper surface of the base. U-shaped groove bottom
The height H1 from the upper surface of the base shall be 80 mm.
4.4.3 There shall be a positioning groove on the upper surface of the base for placing the alcohol tank.
4.5 cast iron pin
The cast iron pin is made of gray cast iron. It should be formed into a cylindrical iron pin after removing the material. The diameter should be 5 mm to 6 mm and the length should be not less than
60 mm, there should be no defects such as trachoma, stoma, white mouth, etc., each set should be no less than 50 pieces.
4.6 Alcohol tank
4.6.1 The size of the alcohol tank L11 × B2 × H4 shall be 150 mm × 30 mm × 25 mm. It shall be made of aluminum with a cover.
4.6.2 The alcohol tank shall have a handle.
4.7 Appearance and workmanship
4.7.1 The surface of the test rod should be blackened, and the surface of the base and handle should be painted. The surface color of blackened parts should be uniform and uniform.
dense. The blackened surface should be free of defects such as spots that are not blackened, various deposits, or mechanical damage caused during the blackening process.
4.7.2 The rest shall comply with 7.4.3 and 7.5 of JY/T 0001-2003.
4.8 Environmental test
Free fall test according to Table 2 of JY/T 0213-1994 3.1.
5 Test method
5.1 Length
Vernier calipers with a division value of 0.02 mm and a steel ruler with a division value of 1 mm should meet the relevant requirements of 4.2 ～ 4.5 and 4.6.1.
5.2 Flatness of the base
Place the base on a level 3 platform and use a feeler gauge to measure the four sides of the base, which should conform to 4.4.1.
5.3 Parallelism of the outer surface of the column
Use a vernier caliper with a division value of 0.02 mm to measure the distance between the upper and lower sides of the outer end of the column (measured at four points), which shall meet 4.4.2.
5.4 Handle rotation force
The test rod is not placed in the U-shaped groove of the base. Rotate the handle to measure the force of the handle turning. The edge of the handle perpendicular to the axis of the test rod during measurement
Applying gravity, the arm is 30 mm.
5.5 Appearance and workmanship
Sensory test.
5.6 Environmental test
According to JY/T 0213-1994 4.6.
6 Inspection rules
6.1 Inspection classification
Product inspection is divided into factory inspection, type inspection and quality supervision inspection.
6.2 Inspection items
The inspection items and inspection methods for factory inspection and type inspection are shown in Table 1.
Table 1 Inspection items and inspection methods for factory inspection and type inspection
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 The sampling methods for factory inspection and type inspection are in accordance with the relevant provisions of JY/T 0002.
6.3.3 During the factory inspection, all the inspection items are inspected first, and samples are taken from the qualified products of all inspection items, and the inspection items are inspected.
6.4 Non-conformance determination
6.4.1 The determination of sampling inspection shall be in accordance with the relevant provisions of JY/T 0002.
Serial number items require factory inspection type inspection
1 Composition 4.1 ● ●
2 Test stick 4.2 ● ●
3 Handle 4.3 ● ●
4 Base material and basic dimensions 4.4.1 ● ●
5 Base post and U-shaped groove 4.4.2 ● ●
6 Place the alcohol tank on the base to position 4.4.3 ○ ●
7 cast iron pin 4.5 ○ ●
8 Alcohol tank 4.6 ○ ●
9 Appearance and craftsmanship 4.7 ○ ●
10 Environmental test 4.8-●
Note. "●" in the table means all inspection items, "○" means sampling inspection items, and "-" means no inspection items.
6.4.2 The failure criterion of a single sample shall be in accordance with the relevant provisions of JY/T 0002.
6.4.3 During the inspection of all inspection items, it shall be determined according to the unqualified criterion of a single sample.
6.4.4 4.1 ～ 4.6 are the main performance indicators.
6.5 Review rules
6.5.1 Unqualified batches and products can be submitted for inspection again after rework.
6.5.2 Due to the re-inspection of sampling inspection items, the transfer rules shall be implemented in accordance with Article 9.3 of GB/T 2828.1-2012.
The same scheme, the general inspection level III, AQL value is 2.5.
6.6 Quality supervision inspection
Refer to type inspection.
7 Signs, instruction manuals, packaging, transportation, storage
7.1 Instruction manual
The instruction manual should explain the operation method in detail, and it should also specify the protective measures to prevent burns and injury when the cast iron pin breaks.
The purchase method after the cast iron pin is used up should also be explained.
7.2 Marking, packaging, transportation, storage
Should comply with JY/T 0001-2003 Chapters 11 and 12.
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