Car lamp lampshade stress measurement loading device

Abstract

The invention discloses a car lamp lampshade stress measurement loading device. The car lamp lampshade stress measurement loading device comprises a frame structure and a loading structure arranged on the frame structure, the loading structure can slide on the frame structure, and the frame structure comprises a pedestal, a working plate and support columns arranged between the pedestal and the working plate. The loading structure comprises an upper adjusting slide block, a lower adjusting slide block fixedly connected with the upper adjusting slide block, an upper pressing plate arranged under the lower adjusting slide block and a lower pressing plate arranged under the upper pressing plate, a unit seat is fixedly arranged on the upper adjusting slide block, a pressure screw shaft is arranged in the unit seat in a matching manner, a worm gear is arranged on the upper end of the pressure screw shaft in a matching manner, a worm is arranged at one side of the worm gear in an engaged manner, and the lower end of the pressure screw shaft traverses the upper adjusting slide block and the lower adjusting slide block and is in threaded connection with the upper pressing plate. The car lamp lampshade stress measurement loading device is convenient for loading, and is easy to operate, good in visibility and simple in structure, and the problem that the previous car lamp lampshade stress measurement process is complex and troublesome is solved.

Description

technical field [0001] The invention relates to the technical field of stress detection devices, in particular to a load device for stress detection of lampshades of vehicle lamps. Background technique [0002] At present, the lampshades of automobile lamps are generally made of plastic products, which are relatively brittle and easy to break. Incomplete lamps will inevitably bring safety hazards to driving. Therefore, manufacturers must go through the stress detection process when producing lampshades. If the lampshade has not passed the inspection, it will be impossible to know the residual stress existing inside it, which may cause the lampshade to be broken or uneven, which not only affects the appearance, but also brings damage to the light. Insecurity. [0003] Of course, there are many ways to detect residual stress, but there are very few special equipment for lampshades. China Invention Application No. 201410609162.5 discloses a blind hole detection method for res...

AI Technical Summary

Problems solved by technology

China Invention Application No. 201410609162.5 discloses a blind hole detection method for residual stress of components, that is, a small through hole or a non-through hole is drilled on the workpiece to release the stress at the measured point, and the strain gauge attached around the hole in advance Measure the amount of released strain, and then calculate the residual stress according to the principle of elasticity. Although this method can also detect the residual stress of the lampshade, it is a destructive test method, which is obviously inappropriate when the component is a valuable part; China Invention Application No. 201310429633.X discloses a detection method for residual stress. For the detection of plastic products, by immersing the product under test in the corrosion solution, the immersion time reaches the set value of the entry time, and if the product under test is taken out if its surface cracks or the surface If powdery particles are formed, the tested product has residual stress and is unqualified. This method only detects whether there is residual stress but does not measure the magnitude of residual stress, and this method will damage the product.

China Invention Application No. 201210073579.5 discloses an ultrasonic detection device for residual stress near the surface of a cavity. The device uses an array ultrasonic sensor transceiver device, which can realize multi-point testing of axial stress and circumferential direction. This method is still used in blind holes of workpieces. After detecting the residual stress, there is damage to the component

Images