News

Electronic universal testing machine for wood grain compress test

Electronic universal testing machine for wood grain compress test

Wood introductions:

Wood generally refers to the wooden materials used in engineering buildings, which are usually divided into soft materials and hard materials. The wood used in the project is mainly taken from the trunk part of the tree. Timber has been a major building material since ancient times due to its easy availability and processing. Wood has good mechanical properties, but wood is an anisotropic material, and the mechanical properties in the direction of the grain and the direction of the grain are very different. The tensile and compressive strengths of the wood are higher along the grain, but the tensile and compressive strengths of the transverse grain are lower. The strength of wood also varies with tree species, and is affected by factors such as wood defects, loading time, moisture content, and temperature. Among them, wood defects and loading time have the greatest impact. Due to the different size and position of the wood knots and the different stress properties (tension or compression), the strength of knotted wood can be reduced by 30%-60% compared with that of non-knotted wood. The long-term strength of wood under long-term load is almost half of the instantaneous strength.

Test methods related to the compressive elastic modulus of wood along the grain

GB/T 15777 method of determination of the modulus of elasticity in compression parallel to grain of wood

The characteristics of wood grain compressive elastic modulus testing machine:

1. Using AC servo motor and AC servo speed control system to control the test process, the control accuracy and quality are greatly improved, stable, efficient, low noise (basically no noise at low speed) and the control speed range is greatly widened (0.05-500mm/min) ), which is not only conducive to low-speed testing of conventional materials (metal, cement, concrete, etc.), but also conducive to high-speed testing of non-metallic materials (rubber, etc.), and can also be used to quickly adjust the test space at no-load, saving auxiliary test time. This test speed meets the requirements for most metal and non-metallic materials.

2. The deceleration mechanism composed of synchronous toothed belt and precision ball screw pair makes the structure more concise and bright, and the transmission efficiency is greatly improved, more coordinated.

3. The double-space structure with independent tension and compression is adopted, which is convenient to operate and avoids the troublesomeness of changing different test accessories when tension and compression are in the same space.

4. Sensors of different specifications can be configured according to requirements, which greatly widens the test range and meets the measurement requirements of different test loads.

5. The main engine adopts a full-spray plastic shell, which is elegant and beautiful in shape.

6. Using advanced control technology, it has three closed-loop control modes of stress, strain and displacement. Each control loop can be automatically switched, and can achieve a smooth transition without impact when switching between modes, and can display the test force, peak value and displacement, speed, test status, test curve, etc.

7. It can control and maintain the rate of test force, deformation and displacement.

8. It can realize the fast/slow lifting and lowering adjustment of the beam when the sample is clamped, and the operation is flexible and can be switched at will.

9. It has the function of returning to the initial position after the test, which is efficient and fast.

10. It has perfect limit protection function, overload, overcurrent protection, automatic shutdown of test break and other functions, which is reliable and safe.

11. Self-built powerful test database, test data can be saved, queried and called at any time.

12. Provide a variety of report printing interfaces, users can edit reports in any format according to their needs, and print them out;

13. The whole control system has high cost performance and high reliability.

14. Carry out tensile tests on materials according to national standards or standards provided by users, count and process test data, and then output and print various required test curves and test reports. Load-time, load-displacement, and displacement - Time, deformation-time and other test curves are displayed during test. Test curves can be enlarged, compared, and traversed, and the test process is monitored, very smart and convenient.

15. Provide professional users with "Standard Addition Program Editor" software, users can flexibly add required standards according to actual needs;

16. The test software under the Windows platform has strong data and graphics processing functions, can print out complete test reports and test curves in real time, and can reserve data interfaces to directly connect to the comprehensive information management network of the enterprise (laboratory). It can also be customized according to the specific situation of the user's local area network.

our products including electronic universal testing machine,hydraulic universal testing machine,impact testing machine,compression testing machine,horizontal tensile testing machine,manhole cover testing machine,pellet compression testing machine,bending testing machine,wood based panel testing machine,thermainsulating materials testing machine,high and low temperating testing machine,ceramic tiles 3 and 4 point bending and flexural testing machine,steel strand tensile testing machine,tensile stress relaxation testing machine,spring tensile and compression testing machine,glass bending testing machine,welcome consulting