TESTING
Introduction
The purpose of this report is to build a device that can be installed to the hydraulic lifting cart to help students work easily on the CNC machine. The device is required to lift up variable sizes and shapes of CNC bases to the CNC milling table. Because of that, the main purpose of the testing device is focused on the balance of cart and load and unload the CNC bases to the shelves in the machine shop. Balancing test is applied as the first test.
The second test is applied on the device is the load and unload the CNC vise test. To pass the test requirement, the device must be able to get the CNC vise on the shelve and load to the CNC table in the machine shop.
Prediction
The predicted performance of this test is around 50 lbs. because the moment force from calculation causes fatigue is 50lbs.
The second test predicts the device can be load and unload the CNC vise within 15 mins because the total lab hours is two hours. So, fifteen minutes will take one-eighth of lab times which is appropriate for a setup time.
Testing Issues
According to the testing predicted calculation, the cart can get stiffed over with 414 lb force. However, the maximum force can lift the cart is 80 lbs. In addition, when the tester lifting the cart, the force can't keep stable. As the result, the force testing in test 01 can be 10 percent of errors.
The Balance Test
1. Balance test 01
The Kurt Vise is hanging on the frame, and face forward to the table in the machine shop.The force is applied from the handle by the tester. In each time, the tester will add 10 lbs until the cart is lifted up. The frame is moved to the beginning, middle and the end of the cart. As the result, the tester wants to find how much force will cause moment to the cart.
2. Balance Test 02
In this test, the weight hangs on the device is 104.21 lbs because the Kurt CNC vise weighs 70 lbs. With 1.5 safety factor, the tested weight is 105 lbs.
For the test, the weight is hanging on the device in three different locations such as beginning, middle, and the end of the cart. The weigh is kept adding until 105 lbs and record the result whether the cart get tipped or not.
Load and Unload Performance Test
For this test, the device is tested by load and unload the Kurt CNC vise to the different CNC vertical milling machine. The load and unload test performs excellently. Because of that, the time performance is recorded as a data for this test.
The predicted time is 15 minutes
The load and unload test is repeated 10 times from different shelves to different CNC machines in the machine shop.
Note: Videos show the Kurt vise is loaded and unloaded to the vertical CNC milling machine.
Note: Balance Test 01 Demo
Figure 06: Balance Test 02 Demo