JY/T 0044-2019 English PDFUS$199.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. JY/T 0044-2019: Collision experimental apparatus Status: Valid
Basic dataStandard ID: JY/T 0044-2019 (JY/T0044-2019)Description (Translated English): Collision experimental apparatus Sector / Industry: Education Industry Standard (Recommended) Classification of Chinese Standard: Y51 Word Count Estimation: 8,858 Date of Issue: 2019-04-08 Date of Implementation: 2019-09-01 Older Standard (superseded by this standard): JY 44-1987 Regulation (derived from): Natural Resources Department Announcement No. 7 of 2019 Issuing agency(ies): Ministry of Education of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 0044-2019: Collision experimental apparatus---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.(Collision experimenter) ICS 03.180 Y 51 Education Industry Standard of the People's Republic of China Replaces. JY/T 44-1987 Collision tester Collision experimental apparatus Published.2019-04-04 2019--09--01 implementation Published by the Ministry of Education of the People's Republic of China JY ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces JY/T 44-1987 "Crash Tester". Compared with JY/T 44-1987, major technical changes It is as follows. ── Added the model name of the collision tester (see Chapter 3); ── Increased the range adjustment requirements of the ball blocking board (see 4.2.5); ── Added requirements for the quality of the hammer (see 4.5.1); ──Added requirements for lining board for table clamps (see 4.6.4); ─ increased security requirements (see 4.7); ─ increased requirements for environmental testing (see 4.9); ── The requirements for the material and quantity of small balls have been increased (see 4.4.1); -Removed the requirement for the passing indicator (see 1.2 of the 1987 version); ── Removed the requirement for the mass ratio of small balls (see 2.2.2 of the 1987 version); -Removed the requirement for experimental error (see 2.6 of the 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. Hangzhou Jinfan Science & Education Instrument Co., Ltd. The main drafter of this standard. Chen Xiaolin. This standard replaces JY/T 44-1987. The release of previous versions of this standard instead of the standard is as follows. --JY/T 44-1979; --JY/T 44-1987. Collision tester1 ScopeThis standard specifies the type designation, requirements, test methods, inspection rules and signs, instruction manuals, packaging, transportation Lose and store. This standard applies to one-dimensional collision tester for teaching.2 Normative referencesThe 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 procedures. Part 1. Sampling plan for batch inspection inspection according to acceptance quality limit (AQL) GB 6675.2-2014 Toy safety Part 2. Mechanical and physical properties GB/T 1958-2017 Product Geometric Technical Specification (GPS) Geometric Tolerance Detection and Verification 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 methods3 Model designationAccording to the provisions of JY/T 0026-1991, the model name of the collision tester is. L ― PZ ― Y ― A Design Number Product feature code, one-dimensional Product name Pinyin prefix, collision tester Product model classification code, special instrument for mechanics Model example. L-PZ-FA stands for collision tester with design number A, one-dimensional collision, and special instrument for mechanics.4 Requirements4.1 Structure and composition JY/T 0044─2019 The collision tester shall be composed of a track, a small ball, a supporting column, a weight, a support and a table clamp. Figure 1 shows the structure of each part of the collision tester. In the picture. 1--ball baffle; 2--track; 3--winder; 4--small ball; 5--pillars; 6--Track positioning screws; 7--Heavy hammer; 8--bracket; 9--set clamp Note. Figure 1 is only used to explain the meaning of the provisions in clauses 4.1 to 4.6, but not for the structure of the instrument. Figure 1 Structure of each part of the collision tester 4.2 Orbit 4.2.1 The track is made of metal material and is divided into two sections, inclined and horizontal. The connection should be arc-shaped, and the radius of curvature of the arc is 70 mm. ± 10 mm. The angle α between the two sections should be 150 ° ± 5 °. 4.2.2 Track width D = 8 mm ± 0.2 mm. The length of the horizontal segment L1 = 70 mm ± 10 mm; the height of the inclined segment H = 105 mm ± 5 mm. 4.2.3 The straightness tolerance of the horizontal section and inclined section of the track shall not be greater than 0.25 mm. 4.2.4 The surface roughness Rz value (supplementary series) of the contact surface between the track and the ball should not be greater than 2.5 μm. 4.2.5 The top of the inclined section should have a ball stopper, and the stop position of the ball stopper should be continuously adjustable within 30 mm. 4.2.6 There should be a winder on the track to wind the weight of the hammer. The winder should be able to effectively control the height of the weight. 4.3 Pillars 4.3.1 The ball support post is made of Φ 4 mm ± 0.1 mm stainless steel tube, and it should be able to stand in front of the track to support the small ball. 4.3.2 The lower end of the support ball is supported by a rotating shaft, which can rotate around the shaft. When the track is inclined downward more than 5 °, it should be able to flip naturally. 4.3.3 The height of the support post can be adjusted up and down, and the adjustment range should not be less than 3 mm. 4.3.4 The horizontal distance L2 from the center of the pillar to the end of the track shall be adjustable within the range of 15.5 mm to 16.5 mm. 4.3.5 The distance between the center of the pillar and the two sides of the track shall be equal. After positioning, there should be no left-right shaking. 4.4 Small ball 4.4.1 There shall be no less than four small balls, two glass balls and two steel balls. 4.4.2 The diameter of the small ball shall be 16 mm ± 0.2 mm, and the roundness tolerance shall not be greater than 0.1 mm. 4.4.3 The surface hardness of the steel ball shall not be less than HRC 60, and the surface shall be chrome-plated. 4.5 Heavy Hammer and Heavy Hammer Line 4.5.1 The mass of the weight shall not be less than 5 g, and the weight shall be a cone. 4.5.2 The total length of the weight line shall not be less than 1 m. One end is wound into the winder, and the other end should be able to be naturally from the center of the end face of the track after the weight is attached. Droop vertically and tighten. 4.6 Stands and clamps 4.6.1 The bracket and table clamp shall be made of metal materials. 4.6.2 The bracket shall be capable of adjusting the inclination of the horizontal section of the track, and the adjustment range shall not be less than 10 °. Note. The bracket is used to support the track 4.6.3 The clamping thickness of the clamp should be 10 mm to 50 mm; when the clamping force is 300 N, the deformation at the opening of the clamp should not be greater than 1 mm. 4.6.4 The bench clamp shall be equipped with an iron lining board with an area of not less than 60 mm × 60 mm and a thickness of not less than 2 mm. 4.7 Security All metal parts of the instrument should not have sharp angles and flashes that may cause harm to the human body. Sharp edges and corners should be chamfered and rounded. 4.8 Appearance quality The appearance quality of the product shall comply with 4.6, 4.17, 5.1, 5.5, 6.1, 6.7, 6.9, 6.11, 6.12, JY/T 0001-2003 6.14, 6.17, 6.18, 6.19, 6.21, 7.1, 7.2, 7.4, 7.7. 4.9 Environmental test According to JY/T 0213-1994 3.1 table 2 vibration test and free fall test.5 Test method5.1 Test equipment The specifications of some test instruments are as follows. a) Universal angle ruler with a division value of 2 ′; b) Vernier caliper, 150 mm, with a division value of 0.02 mm; JY/T 0044─2019 c) steel ruler with a division value of 1 mm; d) A balance with a division value of 0.1 g. 5.2 Orbit 5.2.1 Curvature radius test of orbital transition arc. Two standard circles with a radius of 60 mm 1 mm and 80 mm-1 mm are made. Ratio measurement, the radius of curvature of the track transition arc should be between the radius of these two standard circles. 5.2.2 The angle between the inclination and the horizontal section of the track shall be measured with a universal angle ruler and shall comply with the provisions of 4.2.1. 5.2.3 Track width is measured with vernier calipers. The height of the inclined section of the track is measured with a steel ruler. Track horizontal section length measurement. track water The flat section is leveled, and the steel ball is used to make a stop test along the track bend to the horizontal section. When the steel ball can stably stay, mark the stop on the track Point, and using this point as a boundary, measure the length of the horizontal section of the track with a steel ruler. The above measurement results shall meet the requirements of 4.2.2. 5.2.4 Straightness tolerance measurement of horizontal section and inclined section of track. Use knife edge ruler and feeler gauge according to Table C.8 of Appendix C of GB/T 1958-2017 The method of No. 1 in C.2 for detecting the contact surface between the horizontal section and the inclined section track and the ball shall meet the requirements of 4.2.3. 5.2.5 Surface roughness measurement of the contact surface between the track and the ball. Roughness sample for surface grinding, turning, boring, milling, inserting and planing For comparison, the requirements of 4.2.4 shall be met. 5.2.6 The adjustment range of the baffle is measured with a vernier caliper, which shall meet the requirements of 4.2.5. 5.2.7 The winding mechanism shall comply with the provisions of 4.2.6 based on sensory testing. 5.3 Pillars 5.3.1 The diameter of the pillar is measured with a vernier caliper. After the pillar is vertical, the steel ball should be placed on top of it, and it should be able to stay stably. 5.3.2 Support ball column overturning test. Fix the track and bracket on the platform with a table clamp, and fix a piece on the side of the horizontal section of the track with 5 ° Line of tablets. Adjust the horizontal section of the track to horizontal, and support the pillar vertically. Then gradually tilt the track downward, when the track tilts down more than When the line is 5 °, the pillar should be able to flip naturally. 5.3.3 The adjustment range of the height of the support pillar, and the adjustment range of the horizontal distance from the center of the support pillar to the end face of the track are measured with a vernier caliper, which should meet 4.3.3, 4.3.4. 5.3.4 Distance test from the center of the support post to both sides of the track. According to Figure 2, the knife edge rule is close to the outside of the horizontal section of the track and extends to the vicinity of the support post. Use a vernier caliper to measure the vertical distance A1 from the edge of the ball to the knife edge ruler; then move the knife edge ruler to the other side of the track and measure the distance A2; After the adjustment should be able to make A1 = A2. After tightening the positioning screws, the support post should not shake left and right. Fig. 2 Measurement of spherulites 5.4 Small ball 5.4.1 The diameter of the small ball shall be measured with a vernier caliper and shall comply with the provisions of 4.4.2. 5.4.2 Roundness tolerance measurement. Use a vernier caliper to measure the diameter of the ball from any of 5 different directions, and read out the maximum and minimum measurement values. Half of their difference is the roundness error, which should meet the requirements of 4.4.2. 5.5 Heavy Hammer 5.5.1 The mass of the weight is measured with a balance. The length of the hammer wire is measured with a steel ruler. 5.5.2 Pass the weight wire through the center of the end face of the track, and then wind it onto the winder (Figure 1. 3). Using a sensory test, the weight should sag naturally And tighten, the hammer tip and the hammer line should be on the same straight line. 5.6 Stand and table clamp 5.6.1 The materials of the bracket, the clamp and the lining board shall be inspected by the senses. 5.6.2 Fix the rail and bracket on the platform with a platform clamp, loosen the rail positioning screws, and tilt the horizontal section of the rail down to the lowest and Tilt upwards to the highest, and measure the inclination with the platform with a universal angle ruler, all shall comply with the provisions of 4.6.2. 5.6.3 The clamp thickness of the clamp and the size of the clamp plate are measured with a vernier caliper. 5.6.4 Test of clamping force of bench clamp. Before the test, measure the opening dimension of the bench clamp with a vernier caliper, and then use a rope to tie the clamping screw of the bench clamp At the end, hang the clamp. A weight of 300N is suspended on the splint directly below the screw axis for a suspension time of 10 min After that, use the vernier caliper to measure the opening size of the table clamp again. 5.7 Security The flashing and acute angle tests are in accordance with 5.8 and 5.9 of GB 6675.2-2014, respectively. 5.8 Appearance quality Sensory test. 5.9 Environmental test According to the provisions of 4.3 and 4.6 in JY/T 0213-1994.6 Inspection rules6.1 Inspection classification The inspection of this product 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 Item No. Inspection Item Item Number Factory Inspection Type Inspection 1 Structure and composition 4.1 ● ● 2 Track 4.2 ● ● 3 ball post 4.3 ● ● 4 small balls 4.4.1, 4.4.2 ● ● JY/T 0044─2019 Table 1 Inspection items and inspection methods for factory inspection and type inspection (continued) Item No. Inspection Item Item Number Factory Inspection Type Inspection 5 Ball hardness 4.4.3 ○ ● 6 Weight and weight line 4.5 ○ ● 7 Stand and table clamp 4.6 ○ ● 8 Security 4.7 ● ● 9 Appearance quality 4.8 ● ● 10 Environmental test 4.9-● Note. "●" in the table means all inspection items, "○" means sampling inspection items, and "-" means no inspection items. 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 During the factory inspection, all the inspection items shall be inspected first, and the sampling inspection items shall be inspected among the qualified products. 6.3.3 The samples for type inspection shall be taken from the products that passed the factory inspection. 6.3.4 The sampling method for factory inspection and type inspection shall be in accordance with the provisions of JY/T 0002. 6.4 Non-conformance determination 6.4.1 The determination of sampling inspection shall be in accordance with JY/T 0002. 6.4.2 The failure criterion of a single sample shall be in accordance with 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 The number 1, 2, 3, 4, 7, and 8 in Table 1 are the main performance indicators. 6.5 Review rules 6.5.1 Unqualified products can be submitted for re-inspection after rework. 6.5.2 The re-inspection of sampling inspection items shall be carried out in accordance with 9.3 of GB/T 2828.1-2012. Protocol, general inspection level III, AQL value is 2.5. 6.6 Quality supervision inspection Refer to type inspection. 7 Signs, instruction manuals, packaging, transportation and storage 7.1 Each set of instruments shall have independent positioning packaging. Steel and glass balls should be specially packaged. 7.2 Others shall be implemented in accordance with the relevant provisions of JY/T 0001-2003. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of JY/T 0044-2019_English be delivered?Answer: Upon your order, we will start to translate JY/T 0044-2019_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of JY/T 0044-2019_English with my colleagues?Answer: Yes. 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