1. Transformation plan

Mechanical structure adjustment: First, the horizontal shaft assembly, support arm, brake mechanism and motor of the original double-disc friction brick press were removed, and the cross beam, base, column, pull rod, slide block, screw, nut and ejector device were retained. The purpose of this step is to simplify the structure and improve the stability and reliability of the equipment.

Change of drive mode: In order to achieve the function of the electric screw press, we installed a spline sleeve in the position of the original screw flat wheel. The spline sleeve is provided with an internal spline sleeve outside, and the internal spline sleeve is provided with a flywheel with a wheel groove outside. This flywheel is driven by a servo motor and a synchronous belt to make the flywheel rotate. The rotating motion of the screw is then transformed into a linear motion, driving the slider to do up and down reciprocating motion.

Lubrication system upgrade: the lubrication of screw, nut and guide rail remains unchanged, but a new pneumatic refueling machine has been added for spline sleeves and bearings. This improvement means that the lubrication process is no longer dependent on manual, but through PLC control of oil supply time and oil supply, to achieve automatic lubrication. This not only reduces the risk of mechanical failure, but also increases the service life of the equipment.

Electrical system upgrade: the motor, electric cabinet and operator handle of the original friction brick press are removed and replaced by a servo motor drive system. The new drive system has strong overload and anti-biased load capabilities, a wide speed range, excellent acceleration and deceleration performance, and can respond quickly and frequently start braking and forward and reverse switching. In addition, for the safety of the operator, a human-machine dialogue interface control cabinet, a centralized button station and a safety grating have been added.

Second, the performance characteristics after the transformation

Digital precision control: The direct drive mode of the servo motor makes the energy release be digital precision control, thus ensuring the consistency of the product and improving the pass rate.

Increased productivity: The simple setting of the touch screen makes it easy to adjust the percussion process, making it possible to simulate manual operation. The continuous hitting speed has been significantly improved, which has brought about a substantial increase in production efficiency.

High degree of automation: The modified equipment can realize the automatic process flow from the light pressure exhaust of raw materials to the heavy pressure molding of products, without rich operational experience to complete the operation.

Energy saving and environmental protection: Compared with the traditional friction press, the electric screw press has a significant energy saving effect, which can save about 55% of the electric energy.

The starting current is small, and the impact on the power grid is greatly reduced. Extended service life: Since the screw no longer generates transverse radial forces, the service life of the drive screw, nut and die has been significantly improved, and maintenance costs have been reduced by about 35%.

Safe and reliable: The modified electric screw press adopts multiple safety protection measures such as mechanical and electrical, which greatly reduces the probability of safety accidents.

Summary: The transformation of the friction press into an electric screw press is a technological upgrade and innovation. This transformation not only improves the performance and efficiency of the equipment, but also brings significant economic and social benefits to the enterprise.