In the welding of long and large-scale profiles in high-speed train vehicles, it is generally done by robot welding. Although robot welding has the advantages of fast welding speed and good stability, sometimes interference between the robot welding arm and the fixture occurs due to the design of the workpiece structure and the reason of the fixture, as the robot welding is accomplished by clamping the welding gun with a mechanical arm to perform welding on the workpiece. In this case, the fixtures of vacuum suction cup manufacturers can solve such problems very well.
As the floor is made up of three welded profiles, a heavy block is needed to apply pressure to the middle profile to prevent welding deformation. However, if a heavy block is used to press the floor, the working time will increase and the operation will become laborious. If elongating the hydraulic pressing arms on both sides is used, it will cause interference between IGM welding arms and pressing arms.
To solve this problem, it is best to have a product that can fix and press the product from the back, so as to avoid interference with the welding arm and reduce the working time of lifting heavy blocks.
Vacuum suction cups, as products that use vacuum adsorption as the power source and can automatically generate downward suction force, can solve this problem well as produced by vacuum suction cup manufacturers.
Fixed workpiece situation
CRH380D floor profile, made of 6005A-T6 stretcher profile, the workpiece size is 27000mm × 600mm × 60mm. The total weight of the workpiece is 900kg.
Calculation of vacuum suction pad force
According to the working conditions of the product on-site welding, the high-speed train floor is placed horizontally and will be subjected to multiple lateral forces during welding. Therefore, the formula for the total suction force required is:
F=(M/μ) weight × (G+a) gravitational acceleration × S (safety factor).
M=900kg, taking μ=0.5.
G is gravitational acceleration and the comprehensive acceleration a in the lateral direction is 4m/s^2.
The safety factor S is 1.8.
Then, the maximum total suction force required for tightening the floor during welding is:
According to the length of the workpiece, 27m, it is divided into 3 sections, with each section of 9m. Choose the SPLO series of flat suction cups based on the situation of the dynamic train floor. Use 18 SPLO suction cups of 370mm × 80mm for each 9m section. The suction force of each suction cup is 100kg (in the vertical direction), and the total number of suction cups is 16 × 3=48.
The working principle of the vacuum pneumatic system is mainly that the vacuum suction pad manufacturer forms negative pressure through the vacuum generator device, so as to achieve the complete adsorption state of the vacuum suction cup and the workpiece. The system mainly consists of four parts, which are the vacuum generator, the vacuum solenoid valve, the check valve, and the vacuum suction cup.