Error analysis of a tension spring testing machine

Failure analysis of tension spring testing machinesFMMTextile Testing Instruments, Testing Equipment Manufacturer

FMMTextile Testing Instruments, Testing Equipment Manufacturer

As a commonly used experimental test equipment, the tensile testing machine is widely used to test the physical properties of raw materials, finished products and semi-finished products. Elongation, stress, strain and other test results and test data. The tensile testing machine can be equipped with various fixtures, accessories, two-point extensions and load cells for various tests, and can be connected to a computer to control the machine. But in regular use, it's inevitable that you'll encounter a variety of failures. Next, let me take stock of the seven failures that are common in tensile testing machines:FMMTextile Testing Instruments, Testing Equipment Manufacturer

1. The oil pump cannot pump oilFMMTextile Testing Instruments, Testing Equipment Manufacturer

Reason: 1. The fuel tank filter is clogged;FMMTextile Testing Instruments, Testing Equipment Manufacturer

2. It there is air in the oil pump;FMMTextile Testing Instruments, Testing Equipment Manufacturer

3. Dirt on the oil inlet ball valve. FMMTextile Testing Instruments, Testing Equipment Manufacturer

Solutions: 1. Remove and wash the oil filter;FMMTextile Testing Instruments, Testing Equipment Manufacturer

2. Disconnect the outlet pipe from the exhaust;FMMTextile Testing Instruments, Testing Equipment Manufacturer

3. Disassemble and washFMMTextile Testing Instruments, Testing Equipment Manufacturer

Second, oil pumpLess than the maximum pressure
Reason: 1. There is a serious oil leak in the hydraulic systemFMMTextile Testing Instruments, Testing Equipment Manufacturer

2. The oil return valve does not match the valve port 3. The inner one poetryOil cylinder seal ring is bad or damagedFMMTextile Testing Instruments, Testing Equipment Manufacturer

Solution : 1. Continue to check the seal oil leak /p

2. Re-loop the valve portFMMTextile Testing Instruments, Testing Equipment Manufacturer

3. Replace the new sealing ringFMMTextile Testing Instruments, Testing Equipment Manufacturer

3. The pointer wobbles during loadingFMMTextile Testing Instruments, Testing Equipment Manufacturer

Reason: force measurement The surface roughness of the piston is damaged, resulting in a stiff movement leadsFMMTextile Testing Instruments, Testing Equipment Manufacturer

Solution: Remove the load cell. Grind a bitFMMTextile Testing Instruments, Testing Equipment Manufacturer

Fourth, the accuracy of the machine display is way out of boundsleranzFMMTextile Testing Instruments, Testing Equipment Manufacturer

Cause: 1. The string was not installed properly after it was droppedFMMTextile Testing Instruments, Testing Equipment Manufacturer

2. The passive pointer elastic washer is improperly tightened or dirty, causing dragFMMTextile Testing Instruments, Testing Equipment Manufacturer

Solution: 1. Install the strings as neededFMMTextile Testing Instruments, Testing Equipment Manufacturer

2. Adjust or clean the elastic washer properly and determine the strength by needle or single needle comparisonFMMTextile Testing Instruments, Testing Equipment Manufacturer

Fifth, the pointer cannot return to zero after the operationFMMTextile Testing Instruments, Testing Equipment Manufacturer

Reasons: 1. The pointer bearing is dirtyFMMTextile Testing Instruments, Testing Equipment Manufacturer

2. The pointer nutis loose
Solution: 1. Clean the bearingFMMTextile Testing Instruments, Testing Equipment Manufacturer

2. Remove the cover and tighten the nutFMMTextile Testing Instruments, Testing Equipment Manufacturer

6. Positive value errorFMMTextile Testing Instruments, Testing Equipment Manufacturer

Reason: 1. Oil cylinder Piston has dirt and burrsFMMTextile Testing Instruments, Testing Equipment Manufacturer

2. The pressure plate is rubbed on the pin and on the frame

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Solution: 1. Clean and deburr the cylinder and piston

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2. Reposition the build plateFMMTextile Testing Instruments, Testing Equipment Manufacturer

7. Negative value errorFMMTextile Testing Instruments, Testing Equipment Manufacturer

Reason: 1. The force gauge is roughFMMTextile Testing Instruments, Testing Equipment Manufacturer

2. The pointer is stiff FMMTextile Testing Instruments, Testing Equipment Manufacturer

3. The spring or frame has friction with other partsFMMTextile Testing Instruments, Testing Equipment Manufacturer

Solution: 1. Remove the force gauge for polishing
2. Adjust the spring force
3. Adjust the corresponding part position

The above seven types of failures are common in tensile testing machines and I hope they can be of help to all experimenters.FMMTextile Testing Instruments, Testing Equipment Manufacturer