This car bumper punching and welding machine completes the following works: 2-8 radar holes are automatically punched, and 2-8 radar brackets are automatically welded. 
Normally a bracket has two areas need to be welded, and one hole need to be punched.
The punching hole diameter normally is Φ18.4, can be customized per different diameters. punching angle is normal direction, the bracket is face to face by ultrasonic stems.
All the punching holes are punched by one time, why? Because punching units are used in one process to ensure the accuracy of punching. The number of common punching is 2, 3, 4, 6, 8, can be customized according to different customer’s requirement. The punching units are equipped with hot air heating function to prevent paint cracking, punching drive system using gas liquid booster cylinder drive.
A bracket has two welding areas, normally the ultrasonic unit is one mother horn with two son horns, if all the brackets can be welded by 1,2,3,4,5… times, it depends on how many ultrasonic generators, for example, if choose 1 ultrasonic welding generator, the ultrasonic welding machine will weld 1 time, it means only 1 bracket is welded. So normally choose how many sets ultrasonic welding generators, it is depends on the whole welding cycle time and customer’s budget.
The auto bumper punching and welding machine:
- The external size of the punching and welding equipment is about (L) 4000X (W) 2350X (H) 2350mm; the power is about 5KW; the weight of the car bumper punching and welding machine is about 4.5t
- The auto bumper punching and welder contains 2 stations. The first station is a loading, unloading, and welding station, and the second station is a punching station.
- The punching and welding equipment’s punching adopts gas-liquid pressurized cylinder
- Ultrasonic welding unit can be multi angle adjustment.
The punching and welding process
- After loading the bracket ,load the bumper body, while the vacuum sucker will suck and position the product
Start button, position the nest to lift the bumper body and move it to the punching area 4S
After the product is heated by the hot air gun, the punching unit descends and punches at the same time, and returns to position after punching
3+7S
4S Position the nest to lift the bumper body back to its original position
4S
The main cylinder of the preloading system moves down, and the welding spot preloading lowers to suppress the welding position. 4S
The ultrasonic unit is welded at the same time, and the welding is completed by blowing air cooling
21S (3 times welding)
welding points preload and main cylinder preload reset
4S
Unload product
The punching and welding time to complete the whole product is about 47 seconds (not including the time for loading and unloading).
The above punching and welding machine of car bumper process is a example, it depends on actual status and customer’s requirement.
