The impact puncture performance of the helmet is an essential safety helmet test item for hard hat manufacturers and major quality inspection agencies. It is particularly important to purchase a qualified high-quality helmet impact tester.
First, a professional manufacturer looking for a hard hat impact tester will search through the major search sites and find a lot of manufacturers of hard hat impact testing machines. It can be said to be abound, but the real professional is very few, only real Professional manufacturers who understand standard research standards can produce qualified and high-quality products.
How to judge whether the manufacturer is professional? First, look at the company website. You can see whether the helmet detection equipment is listed separately in the product list and whether it can test all the testing performance of the helmet. According to the new national standard GB/T2812-2006 "Hard Hat Test Method" and GB/T2811-2007 "Hardware", it can be learned that there is a helmet impact absorption performance, helmet puncture performance, and lateral rigidity of the helmet. , safety helmet chin straps, helmet vertical spacing, hard hat wearing height, helmet anti-static performance, helmet insulation performance, safety helmet flame retardant, hard hat pretreatment, helmet pretreatment, helmet immersion test , Hard hat ultraviolet radiation pretreatment thirteen tests, if the manufacturer is professional enough, the thirteen tests will have the appropriate testing equipment testing. Only manufacturers who specialize in producing helmet testing equipment can truly understand the relevant standards, and then truly research the helmet crash test machine that strictly meets the standards, and pay attention to the qualification of this series of products. Second, business professionals must understand the product specialty. The business staff will be the compass of the procurement staff. Only when the navigation is correct, the user can buy the products that are suitable for themselves to meet their real needs. Only in this way will the users not spend money to buy something that is not suitable for their own needs, does not meet the testing standards, unqualified product.
Second, to determine whether the helmet impact test machine meets the national standard GB/T2812-2006 "hard hat test method" standard for the helmet impact test machine standard key requirements are as follows:
1. Impact puncture height: 1000mm ± 5mm (the height of the corresponding drop hammer puncture hammer from the top of the test helmet).
2, drop hammer: quality 5-5.01kg, hammer head is hemispherical, radius is 48mm, material is 45# steel, symmetrical appearance.
3, puncture hammer: mass of 3 - 3.05kg, puncture part of the cone angle of 60 °, cone tip diameter 1mm, length 40mm, maximum diameter 28mm, hardness HRC45 (standards require puncture hammer to be in the center of the cap diameter within 100mm At the weakest point of the structure, the user also needs to pay attention when purchasing the product. Some problems due to the structure of the puncture hammer are not at the center.
4, 1 #, 2 # head model: to comply with the provisions of GB/T2812-2006 Appendix A. The mass is 5.0kg ± 0.1kg, which consists of the main body of aluminum or magnesium alloy plus weight. The top surface of the head mold is made of metal and can be repaired after impact.
5, force sensor: Measuring range 0-20000N, frequency corresponding to the minimum 5kHz, dynamic force sensor.
6, data processing devices: data processing devices and measuring sensors supporting the final record and display the impact of the value of the device. The impact force acquisition limit is 500N, the continuous sampling time is not less than 40ms, the sampling frequency is not less than 20KH, and the maximum value within the sampling interval is automatically acquired and displayed.
7. Measurement Accuracy: ±2.5% of full scale range.
8. Power-on display device: If there is a circuit closed circuit device, it can signal that the puncture hammer has contacted the head mold.
The above requirements are the basic standard requirements for the helmet impact tester. These can be compared with the technical indicators provided by the manufacturer's product technical data, and then the non-professional manufacturer that does not meet the standard can be eliminated accordingly.
Third, the purchase of helmets impact testing machine precautions Some manufacturers of helmets impact testing machine technical data is listed directly in the standard or from other professional manufacturer data intercepted over, but its own product is in accordance with Standards need further verification. These also require the user to pay attention when purchasing.
Some technical indicators can be directly verified, but some, for example, whether the helmet impact tester sensor uses a 5000HZ dynamic sensor and whether the data processing device continuously samples, these can only be verified by a third-party testing agency. The third-party testing agency of the 5000HZ dynamic sensor of the helmet impact tester only has the qualification of China Institute of Metrology, and any other third-party testing agency does not have the measurement qualification of 5000hz dynamic force sensor. If the measurement report used by the manufacturer is not China Measurement Scientific Research Institute, then we can determine that this equipment department meets the requirements of the new standard, can not be identified by the relevant state departments, users can allow manufacturers to provide the helmet when the impact test machine calibration certificate, the authenticity of the calibration certificate The China Academy of Metrology Sciences is verified by the certificate number on the certificate.
Other equipments for the helmet impact tester include: ZM-812 helmet lateral rigidity tester, ZM-813 helmet chin strap strength tester, ZM-815 helmet chin strap strength lateral stiffness tester, ZM- 816 helmet vertical spacing wear height measuring instrument, ZM-817 helmet fire resistance tester, ZM-818 helmet anti-static performance tester, ZM-819 hard hat electrical insulation tester, ZM-820 helmet UV pre-test Treatment box, ZM-821 hard hat high temperature pretreatment box, ZM-822 hard hat low temperature water immersion pretreatment box This article for Qingdao Zhong Bang Instrument Co., Ltd. original article, if you need to reprint, please add the source of the instructions, without permission, unauthorized use, Responsibility!
First, a professional manufacturer looking for a hard hat impact tester will search through the major search sites and find a lot of manufacturers of hard hat impact testing machines. It can be said to be abound, but the real professional is very few, only real Professional manufacturers who understand standard research standards can produce qualified and high-quality products.
How to judge whether the manufacturer is professional? First, look at the company website. You can see whether the helmet detection equipment is listed separately in the product list and whether it can test all the testing performance of the helmet. According to the new national standard GB/T2812-2006 "Hard Hat Test Method" and GB/T2811-2007 "Hardware", it can be learned that there is a helmet impact absorption performance, helmet puncture performance, and lateral rigidity of the helmet. , safety helmet chin straps, helmet vertical spacing, hard hat wearing height, helmet anti-static performance, helmet insulation performance, safety helmet flame retardant, hard hat pretreatment, helmet pretreatment, helmet immersion test , Hard hat ultraviolet radiation pretreatment thirteen tests, if the manufacturer is professional enough, the thirteen tests will have the appropriate testing equipment testing. Only manufacturers who specialize in producing helmet testing equipment can truly understand the relevant standards, and then truly research the helmet crash test machine that strictly meets the standards, and pay attention to the qualification of this series of products. Second, business professionals must understand the product specialty. The business staff will be the compass of the procurement staff. Only when the navigation is correct, the user can buy the products that are suitable for themselves to meet their real needs. Only in this way will the users not spend money to buy something that is not suitable for their own needs, does not meet the testing standards, unqualified product.
Second, to determine whether the helmet impact test machine meets the national standard GB/T2812-2006 "hard hat test method" standard for the helmet impact test machine standard key requirements are as follows:
1. Impact puncture height: 1000mm ± 5mm (the height of the corresponding drop hammer puncture hammer from the top of the test helmet).
2, drop hammer: quality 5-5.01kg, hammer head is hemispherical, radius is 48mm, material is 45# steel, symmetrical appearance.
3, puncture hammer: mass of 3 - 3.05kg, puncture part of the cone angle of 60 °, cone tip diameter 1mm, length 40mm, maximum diameter 28mm, hardness HRC45 (standards require puncture hammer to be in the center of the cap diameter within 100mm At the weakest point of the structure, the user also needs to pay attention when purchasing the product. Some problems due to the structure of the puncture hammer are not at the center.
4, 1 #, 2 # head model: to comply with the provisions of GB/T2812-2006 Appendix A. The mass is 5.0kg ± 0.1kg, which consists of the main body of aluminum or magnesium alloy plus weight. The top surface of the head mold is made of metal and can be repaired after impact.
5, force sensor: Measuring range 0-20000N, frequency corresponding to the minimum 5kHz, dynamic force sensor.
6, data processing devices: data processing devices and measuring sensors supporting the final record and display the impact of the value of the device. The impact force acquisition limit is 500N, the continuous sampling time is not less than 40ms, the sampling frequency is not less than 20KH, and the maximum value within the sampling interval is automatically acquired and displayed.
7. Measurement Accuracy: ±2.5% of full scale range.
8. Power-on display device: If there is a circuit closed circuit device, it can signal that the puncture hammer has contacted the head mold.
The above requirements are the basic standard requirements for the helmet impact tester. These can be compared with the technical indicators provided by the manufacturer's product technical data, and then the non-professional manufacturer that does not meet the standard can be eliminated accordingly.
Third, the purchase of helmets impact testing machine precautions Some manufacturers of helmets impact testing machine technical data is listed directly in the standard or from other professional manufacturer data intercepted over, but its own product is in accordance with Standards need further verification. These also require the user to pay attention when purchasing.
Some technical indicators can be directly verified, but some, for example, whether the helmet impact tester sensor uses a 5000HZ dynamic sensor and whether the data processing device continuously samples, these can only be verified by a third-party testing agency. The third-party testing agency of the 5000HZ dynamic sensor of the helmet impact tester only has the qualification of China Institute of Metrology, and any other third-party testing agency does not have the measurement qualification of 5000hz dynamic force sensor. If the measurement report used by the manufacturer is not China Measurement Scientific Research Institute, then we can determine that this equipment department meets the requirements of the new standard, can not be identified by the relevant state departments, users can allow manufacturers to provide the helmet when the impact test machine calibration certificate, the authenticity of the calibration certificate The China Academy of Metrology Sciences is verified by the certificate number on the certificate.
Other equipments for the helmet impact tester include: ZM-812 helmet lateral rigidity tester, ZM-813 helmet chin strap strength tester, ZM-815 helmet chin strap strength lateral stiffness tester, ZM- 816 helmet vertical spacing wear height measuring instrument, ZM-817 helmet fire resistance tester, ZM-818 helmet anti-static performance tester, ZM-819 hard hat electrical insulation tester, ZM-820 helmet UV pre-test Treatment box, ZM-821 hard hat high temperature pretreatment box, ZM-822 hard hat low temperature water immersion pretreatment box This article for Qingdao Zhong Bang Instrument Co., Ltd. original article, if you need to reprint, please add the source of the instructions, without permission, unauthorized use, Responsibility!
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