Product introduction of cement electric bending tester:
Cement electric flexural testing machine is used to test the strength of cement. The testing equipment is designed and manufactured by our company according to the requirements of the standard for flexural testing of cement mortar. Inspection of flexural strength of rubber sand, and can be used for flexural strength testing of other non-metallic brittle materials. It has the characteristics of simple operation and convenient use, intuitive data, automatic shutdown after the test and so on. A large test force is A0N when single lever is used, A large test force is 5000N when double lever is used. The scale of the testing machine has a conversion scale specifically for the flexural strength and flexural strength of cement soft rubber sand. When the reading value is ** to 0.4N and 0.001Mpa, when the large test force is 5000N, the reading value is ** to 1N and 0.005 Mpa.
Second, the technical parameters of cement electric bending tester:
★ A strong value: 5000N
★ Loading speed: 50 ± 5) N / s
★ Motor model: SD-75
★ Bending clamp: diameter of loading roller and support roller Φ10mm / distance between support roller Amm / drawer plate distance: 46mm
★ Relative error of displayed value: ＜ ± 1%
★ Dimensions: 1075mm × 250mm × 760mm
★ Net weight: about 85kg
Third, the operating rules of the cement electric bending tester:
This test machine is used directly on the platform in a vibration-free environment. The platform must be calibrated to a level (1 / A0).
When testing in the range of resistance 5000N (using double levers), hang the anti-folding fixture on the middle blade of the small lever (that is, as shown in Figure 1). Remove the small lever and the short lever (9) and the force bearing seat (7) originally connected to the large lever (8) and connect the upper part of the fixture with the long lever (8) to the large lever, and the lower half is rotated from the original position Screw out into the nut (2) on the base (27) opposite to the upper half.
Before the test, ** first turn on the power, press the button (21) on the downstream moving weight, and push the swimming weight to the left by hand, so that the zero line of the upstream weight (19) of the swimming weight is aligned with the ruler (26 ) Zero line, the engraved line aligned after the button is released may move. At this time, you can turn the screw with the knurled part on the right end of the screw and move the weight to make the two zero lines coincide. Adjust the zero-setting contact screw (31) behind the angle indicator plate so that it just comes into contact with the swimming weight, and then use the nut (32) to tighten the zero-setting contact screw (31) to adjust the vernier (19). Whether it coincides with the zero line of the ruler. If A coincides, the zero-setting contact screw should be readjusted and the above adjustment is repeated until the vernier and the zero line of the ruler coincide when the moving weight and the zero-setting contact screw just touch.
Loosen the lock nuts (14) and (16), move the large and small balance B so that the large lever (17) is as balanced as possible, and then turn the locking screw to lock the large balance B (15) on the large lever , Move the nut (13) on the small balance B (12), make the small balance B move until the large lever is fully balanced, and then use the locking screw to lock the small balance B on the large lever, pay attention to the size balance B The locking must be reliable, so as not to break the adjusted balance when the large lever is dropped due to the test piece breaking during the use process. Place the specimen in the anti-buckling fixture, and align it with the alignment plate (5) on the fixture by feel and visual inspection. Turn the handwheel (1) under the fixture to make the loading shaft (4) on the pull-down frame (3). ) Make contact with the specimen, and continue to rotate a certain angle, so that the large lever has a certain elevation angle. The data is determined based on the amount of deformation when the specimen breaks. Can be read on the angle indicator. (2 ° for each division) Press the start button on the electric control box (28), the motor (10) immediately rotates the screw to push the weight to the right, the machine starts to load, the large lever gradually sinks, and the large lever When the level is close to the level, the specimen breaks. The limit switch bumper (29) at the right end of the large lever pushes the limit switch, disconnects the motor power, and the motor stops immediately. At this time, you can read from the marker line and scale of the cursor The test body resistance or flexural strength value is obtained, and one test is ended at this time.
Press the button (21) to move the swimming weight to the left, reset the swimming weight, and then perform ** tests.
The machine must be kept clean and dry during use. In particular, each blade and blade holder must be rust-proof to avoid reducing sensitivity and accuracy. There must be any lubricating oil in the blade and the blade holder A to avoid sticking dust, blocking the movement of the lever, and affecting the sensitivity. The machine should be covered with a dust cover after use.
The limit switch striker on the right end of the large lever must be adjusted to the limit switch just when the large lever drops to the end. Do not adjust the position where the limit switch is activated too early to avoid damaging the limit switch. The moving weight for loading is on the lever. When the button is not pressed, there should be excessive left and right movement of A. If the swimming weight has obvious vibration on the screw rod for a long time, you can replace the half nut. Need to come to the factory to purchase.
When the swimming weight moves, it can be solved as follows:
Just put some green paper on the bearing cover at the right end of the screw head.
Fourth, the structure of cement electric bending tester:
This testing machine consists of components such as base, column, upper beam, long and short levers, large and small levers, angle indicator plate, anti-bending fixture, swimming weight, size balance B, transmission motor, transmission screw, and electrical control box .