Servo-driven automatic mold repair and electrode cap replacement integrated mechanism

Abstract

The invention discloses a servo-driven automatic mold repair and electrode cap replacement integrated mechanism. The servo-driven automatic mold repair and electrode cap replacement integrated mechanism comprises an electrode cap mold repair and cap detachment unit, an electrode cap storage unit and a buffer unit. The electrode cap mold repair and cap detachment unit comprises a power source, a cap detachment unit, a mold repair unit and a transmission gear set. The transmission gear set at least comprises a fourth gear with spiral guide grooves correspondingly formed in the end faces of the two sides. A ball support is fixedly connected to the buffer unit. An upper ear plate portion and a lower ear plate portion are arranged on the ball support. A ball capable of being matched with the corresponding spherical spiral groove is arranged on the lower end face of the upper ear plate portion. A ball matched with the corresponding spherical spiral groove is arranged on the upper end face of the lower ear plate portion. The two balls are coaxially arranged. The fourth gear is mounted between the upper ear plate portion and the lower ear plate portion. The servo-driven automatic mold repair and electrode cap replacement integrated mechanism is simple in structure and convenient to use. Compared with an independent mold repair device or a cap replacement machine, the servo-driven automatic mold repair and electrode cap replacement integrated mechanism has the beneficial effects that the integration is high, the drive force is more stable, the control over the mold repair amount is more accurate, and cap taking is more reliable.

Description

technical field [0001] The invention relates to an integrated mechanism for mold repairing and electrode cap replacement, which belongs to the technical field of automatic manufacturing of automobile production, and in particular to a servo-driven automatic mold repairing and electrode cap integrated mechanism. Background technique [0002] At present, modern automobile production lines generally use robots for spot welding of automobile body-in-white. The intelligent and high-speed movements of robots can meet the high production capacity requirements of automobile production. However, the electrode caps used for welding are frequently switched on and off and pressure is applied during robot welding. , the surface of the electrode cap is easy to form an oxide layer, which affects the conductivity of the electrode cap, and then seriously affects the welding quality of the body in white. Grind the electrode cap. When the outer wall thickness of the ground electrode cap is les...

AI Technical Summary

Problems solved by technology

[0004] 1. Independent automatic cap changing mechanism, which adopts pneumatic drive, the clamping force is small and unstable, and the reliability of cap changing is not very high;

[0005] 2. Conventional automatic mold repairing and cap changing integrated mechanism, which is driven by an ordinary motor. The chuck mechanism for cap changing usually uses a spring or rubber washer mechanism to clamp the electrode cap, and then the motor continues to rotate to close the gap between the electrode cap and the electrode rod. Then the robot lifts up slowly with the welding torch to separate the electrode cap from the electrode rod to achieve the effect of changing the cap. This method has two disadvantages: (a) The insufficient clamping force generated by the chuck spring may cause When the motor rotates, the electrode cap and the collet slip, which is not enough to loosen the electrode cap and the electrode rod. When the robot is lifted, the electrode cap cannot be removed; (b) this structure requires a cap changer to remove the electrode cap There must be good coordination with the robot's movements. When the robot is lifted, it must be ensured that the electrode cap and the electrode rod have been loosened by the cap changer, so as to ensure that the electrode cap can be removed smoothly. The electrode rod will be pulled out of the chuck together, and the electrode cap is still not removed

However, this technology is realized by using the cylinder to push the rack to cooperate with the rotation and downward movement of the gear during the cap changing process, so first of all, the gear cannot rotate continuously during each cap changing process, so there is insufficient pull-off force, resulting in cap changing The technical disadvantage of unstable success rate; at the same time, because the gear cannot realize continuous rotation, it is impossible to integrate the gear and the mold repairer into an integrated structure, and realize the two functions of mold repair and cap replacement at the same time

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