In the fields of coal mining, lifting and hoisting, ship anchoring, material transportation, and vehicle anti-skid, chains are key load-bearing components, and their breaking force, load extension rate, and overall mechanical performance directly affect operational safety and equipment reliability. Chain specimens usually have the characteristics of long length, large tonnage, and special shape. Traditional vertical tensile testing machines are limited by space and clamping methods, making it difficult to meet their precise detection needs. As a professional manufacturer in the field of mechanical testing in China, Jinan Xinguang Testing Machine Manufacturing Co., Ltd. (hereinafter referred to as "Xinguang") has launched an upgraded version of the microcomputer controlled electro-hydraulic servo horizontal tensile testing machine (chain specific) with more than 20 years of technical accumulation, providing high-precision and high-efficiency specialized solutions for the tensile performance testing of high-strength circular ring chains, lifting chains, anchor chains and various conveyor chains for mining.
The core of chain tensile testing lies in accurately measuring the breaking load, specified elongation rate, and overall deformation characteristics of the chain under axial tension. Unlike conventional bars and wires, chains are composed of multiple links, with long specimens and complex stress. When clamping, it is necessary to ensure that each link is evenly stressed to avoid abnormal fracture caused by local stress concentration. The Xinguang Chain Special Horizontal Tensile Testing Machine has been specially designed to address these pain points and has the following outstanding advantages:
1. Large tonnage coverage to meet the testing needs of heavy-duty chains
For the testing needs of different specifications of chains, Xinguang can provide various tonnage models such as 1000kN, 2000kN, 3000kN, 5000kN, and even 10000kN to meet the breaking force detection of various specifications of mining ring chains, lifting chains, and anchor chains. The host adopts a horizontal frame structure with strong rigidity and high stability, ensuring the authenticity and reliability of test data during large tonnage loading.
2. Extra long testing space, easily accommodating the entire chain
Chain samples are often several meters long, making it difficult for vertical testing machines to clamp. The testing space of Xinguang Chain Special Horizontal Tensile Testing Machine can be customized, with a tensile space of more than 10 meters, fully meeting the clamping requirements of the entire chain or long chain segments. The mobile crossbeam adopts electric drive, which can freely adjust the position of the test space, making the operation convenient and efficient.
3. Chain specific fixture, evenly stressed and anti slip
The equipment is equipped with chain specific pin type fixtures or winding type fixtures, specially designed for different chain types such as circular chains and lifting chains:
-Pin type fixture: directly connected to the chain link through a pin shaft, simulating the actual force state of the chain, ensuring that each chain link is evenly loaded
-Wrapping fixture: suitable for long chains or anchor chains, increasing the contact area through winding wheels to prevent stress concentration from causing wire breakage
-Hydraulic automatic clamping: The clamping force is constant and controllable, avoiding manual operation differences and improving test repeatability
4. High precision measurement and control system, with real and reliable data
Equipped with high-precision load sensors and displacement measurement systems:
-The accuracy of the test force indication is better than ± 1% (level 1 accuracy)
-Effective measurement range covers 2% to 100% FS
-Displacement resolution up to 0.01mm
-The effective stretching stroke of the oil cylinder can reach more than 1 meter, meeting the travel requirements when the chain breaks
5. Fully automatic closed-loop control, intelligent loading
Adopting the fully digital multi-channel closed-loop measurement and control system independently developed by Xinguang, it supports multiple control modes such as constant speed test force, constant speed displacement, and constant load holding, and can smoothly switch between control modes. Real time display of force displacement curve during the experiment, automatic calculation of key indicators such as fracture load and specified elongation, and automatic generation of testing reports that meet standard requirements.
6. Multiple safety measures to ensure the safety of the experiment
Chain breakage releases enormous energy instantly, and safety protection is crucial. Device configuration:
-High strength safety cover: effectively prevents chain breakage and splashing
-Overload protection: Automatic shutdown when the range exceeds 2% -5%
-Travel limit protection: dual protection of electronic limit and programmable control
-Emergency stop button: can quickly stop the machine in case of emergency
-Remote operation: Test personnel can control the test process through a computer from a safe distance
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