Spring Tension and Compression Testing Machine

Spring Tension and Compression Testing Machine

I. Basic Concepts and Principles:

Resolution: The minimum discernible difference in the indication of the testing machine's display device.

Peak Load: The maximum force value endured by the specimen during the testing process.

Free Length (Height) of Spring: The length of a tension or compression spring when no external force is applied at both ends.

Residual Height: The height of the object after the spring has deformed under external force, denoted as H.

Deformation Amount: The relative displacement of the spring along the direction of the load, calculated as the height difference (free height – residual height), denoted as ΔH.

Spring Stiffness: The load or torque required to produce a unit length (angular) deformation in the spring, K = (F2 - F1) / (H2 - H1), expressed in N/mm.

Spring Compliance: The unit length deformation required to produce a unit load or torque in the spring, K = (H2 - H1) / (F2 - F1), expressed in mm/N.

Average Stiffness: The average value of the segmented stiffness of the spring.

Average Compliance: The average value of the segmented compliance of the spring.

The spring tension and compression testing machine described below refers to the following standards:

JB/T 7796-2017 "Spring Tension and Compression Testing Machine" standard.

Manufactured according to the technical requirements specified in JIS B7738-2001 Japan "Compression and Tension Disc Spring Testing Machines".

Calibrated according to JJF1134-2005 "Calibration Specification for Special Purpose Force Measuring Machines".

II. Product Introduction:

In 2019, comprehensive upgrades were made to the mechanical parts, sheet metal parts, and especially the electrical control system, enhancing the coordination, integrity, and precision of the entire machine to a higher level. The convenience and speed in practical use have been greatly improved, while also facilitating future after-sales services. The control unit of this machine is the latest generation micro-operating system independently developed by our company, with completely independent intellectual property rights. Our company's rich industry experience and continuous innovation philosophy ensure that our product quality, precision, and practical convenience remain at the leading level in the industry.

The mechanical structure, working principles, and appearance design of this machine draw on the advanced experience of foreign manufacturers. The overall structure and stiffness are strictly designed and manufactured in accordance with the industry standards of the National Machinery Department, specifically for the precision testing of small springs. This machine is particularly suitable for testing various precision spiral springs, small disc springs, spring sheets, and special-shaped springs. It is mainly used in precision testing laboratories of spring manufacturing enterprises, as well as in places such as spring user enterprises, quality inspection, metrology, and力学 laboratories of various universities.

Environmental and Working Conditions

1. Ambient temperature between 10°C and 35°C; relative humidity not exceeding 80%;

2. In a clean environment free from vibrations, corrosive media, and strong electromagnetic interference;

3. The fluctuation range of the power supply voltage should be within ±10% of the rated voltage;

4. Installed correctly on a stable foundation with a levelness of 0.2/1000;

5. The distance from the sides of the equipment to the walls should be no less than 0.8m to facilitate future maintenance and upkeep.

III. Main Technical Parameters:

IV. Features of Precision High-End Models:

☆ Large-screen control interface, simple, intuitive, easy to learn and understand, suitable for operators of different age groups;

☆ Well-proportioned structure, exquisite spray-painted sheet metal, aesthetically pleasing appearance, high-end and upscale;

☆ Parameterized design of the whole machine configuration, including machine hardware configuration, sensor calibration, motion control, test operation, etc., all configurable to meet different user needs;

☆ Particularly suitable for testing微小精密弹簧, spring sheets, and elastomers, as well as laboratory precision testing;

☆ Pre-set test methods for different types of specimens, eliminating the need for setup before each test;

☆ Four test methods, two test types, can be connected to a three-color indicator light to display results with lights;

☆ High-speed data acquisition while ensuring precision and repeatability, high degree of automation in testing, one-click completion of the entire test process, greatly improving testing efficiency;

☆ For a single type of spring, repeated batch testing can be set up, improving online testing efficiency;

☆ Electronic handwheel for fast and slow loading,最小可实现1μm (micrometer) deformation movement;

☆ Display screen uses an industrial-grade 9.7-inch LCD screen (not commercial-grade available on the market), 1024*768 resolution, with advantages such as full interface control, accurate touch control, long lifespan, stable performance, wide viewing angle, and low eye damage;

☆ The entire test control process can use a stylus for accurate point-and-click operation, reducing misoperation;

☆ Main components are selected from foreign brands or domestic high-quality brands;

☆ Automatic judgment, automatic analysis, and real-time display of data results;

☆ High testing precision of the whole machine, moderate price, efficient and high-quality after-sales service, can replace similar foreign models.