Pressurizing toggle joint punching machine

Abstract

The invention discloses a pressurizing toggle joint punching machine which comprises a rack, a sliding block assembly and an ejection assembly. The sliding block assembly and the ejection assembly areoppositely arranged on the rack, the rack is provided with a through hole allowing the ejection assembly to extend out, the ejection assembly comprises an ejection rod device and a connecting rod device, the ejection rod device is arranged at the upper end of the connecting rod device, and the ejection rod device ascends and descends along with ascending and descending of the connecting rod device. The pressurizing toggle joint punching machine has the beneficial effects that the manner that an oil cylinder drives a toggle joint is adopted, driving force of the oil cylinder is increased, 5-7times of driving force can be increased, cost is saved, and the production efficiency is improved; and a unique lower ejection structure is adopted, according to the characteristics that ejection force needed in the early period during ejection is large and the ejection force needed after a product is loosened is small are used, a single-edge cam is used for ejection in the early period during ejection, the lever principle is used, the ejection force is increased, two-edge cams are used in the later period for ejection at the same time, and the ejection stroke is increased.

Description

technical field [0001] The invention relates to the field of mechanical equipment, in particular to a pressurized toggle press. Background technique [0002] Punching machines are widely used in stamping and forming in various fields. [0003] Chinese invention patent CN201310033319.X is a high-speed punching machine, including a head seat, a middle seat, a foot seat, a transmission mechanism, a crankshaft, a slider and a counterweight mechanism, and it is characterized in that the high-speed punch machine is a cuboid structure, and the head seat, The middle seat and the foot seat are respectively connected by the base bolts on the four corners, the transmission mechanism and the crankshaft are arranged on the head seat, the slider is connected with the crankshaft, and the counterweight mechanism is composed of a counterweight seat, a counterweight connecting rod and The crankshaft is composed of a counterweight shaft, and the crankshaft is provided with a split bearing con...

AI Technical Summary

Problems solved by technology

[0004] Both the above-mentioned punch presses and the existing toggle punch presses are driven by a flywheel driven by a motor, which drives the crankshaft to rotate to drive the connecting rod to pull the toggle angle, and drives the slider to move up and down to complete the forged product. The disadvantages of the above-mentioned driving method are as follows: 1. Crankshaft drive The force at each angle is different, the maximum at 180 degrees and the minimum at 0 degrees (very small); 2. The stroke length is fixed and cannot be adjusted (driven by the crankshaft turning one circle); 3. When the actual load is greater than that of the punching machine When the load is rated, it will cause the punch press to lock up and damage the punch press; 4. The existing large-tonnage hydraulic press must be equipped with a large oil cylinder, a large oil tank, a large oil pump, and a large flow control valve, which is expensive, and the equipment runs slowly and consumes a lot of energy; 5. The structure adopted by the existing mechanical press lower material ejection structure, either the ejection stroke is very short, or the ejection force is very small, and it is impossible to achieve a large ejection force and a large ejection stroke at the same time

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