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TSCHORN tools are material handling equipment for lifting or jacking heavy loads, operating intermittently to lift weights. Most lifting tools begin a vertical or combined vertical and horizontal work stroke after the rigging picks up the load, unload at the destination, then return empty to the pickup point to complete one work cycle before performing the second lift. Generally, during operation, lifting tools perform picking, moving, and unloading sequentially, with the corresponding mechanisms working intermittently. Lifting tools are mainly used to handle piece goods; when equipped with grabs, they can handle bulk materials such as coal, ore, and grain; when equipped with ladles, they can lift liquid materials such as molten steel. Some lifting tools, such as elevators, can also be used to carry people. In certain application scenarios, lifting equipment is the primary operational tool; for example, cranes for loading and unloading materials at ports and stations are the main operational tools.

TSCHORN tool principles

The principle of hydraulics consists of two cylinders of different sizes filled with water or oil. Water-filled units are called "water presses"; oil-filled units are called "oil presses." Each cylinder contains a sliding piston. If a specific pressure is applied to the small piston, according to Pascal's law, the small piston transmits this pressure through the fluid pressure to the large piston, pushing the large piston upward. Let the cross-sectional area of the small piston be S1, and the downward force applied to the small piston be F1. Thus, the pressure exerted by the small piston on the fluid is P=F1/SI, which "can be transmitted unchanged in magnitude by the liquid in all directions." The pressure received by the large piston must also equal P. If the cross-sectional area of the large piston is S2, the upward force F2=PxS2 generated by the pressure P on the large piston is a multiple of the small piston's cross-sectional area. From the above equation, applying a smaller force to the small piston results in a larger force on the large piston; therefore, hydraulic presses are used for pressing plywood, extracting oil, lifting heavy objects, and forging steel.

TSCHORN tool structure and composition

The cross-sectional shape and distribution of the magnetic poles vary depending on the workpiece. Common structural types of electromagnetic chucks include rectangular and circular configurations. Rectangular magnetic poles are arranged in either longitudinal or transverse patterns. Longitudinal arrangement of rectangular magnetic poles is suitable for securing larger workpieces, while transverse arrangement is suitable for securing smaller workpieces. Circular chucks are suitable for securing ring-shaped workpieces or workpieces with complex geometries. The main characteristics of standard electromagnetic chucks are: magnetic flux lines are evenly distributed across the chuck surface, magnetic attraction cannot be concentrated, and the magnetic force per unit area is relatively low; the direction of the magnetic force is perpendicular to the chuck surface and difficult to alter, generating only a single type of magnetic force for workpieces with the same contact area; the point of application of the magnetic force on the workpiece is limited to the contact surface between the workpiece and the chuck and cannot be freely adjusted. Therefore, disadvantages during machining include low positioning accuracy, insufficient clamping force, narrow scope of application, and low production efficiency.

TSCHORN tool usage

1) Before use, conduct a careful inspection to ensure there is no external damage, switches operate flexibly without sticking, and power cords and the tool housing are intact. Use a 500V megohmmeter to measure the insulation resistance between the winding and the housing; it must not be less than O.5 megohms. See the attached table for insulation resistance values. 2) Handheld electric tools with metal housings must have a reliable protective grounding wire. The power cord shall be a multi-core soft rubber-sheathed cable, and its grounding protection wire must be securely connected at both ends. 3) Handheld electric tools should be operated by dedicated personnel with appropriate professional knowledge. Strictly adhere to relevant safety operating procedures during use. 4) Before use, check whether the relevant electrical and mechanical protective devices are intact and functioning normally. Also ensure that rotating parts move flexibly without sticking. 5) When using Class I handheld electric tools, operators must wear compliant protective equipment and use qualified protective gear. Take appropriate anti-electric shock safety measures as required, such as installing residual current devices (RCDs) in the power circuit, or having the operator wear insulating gloves, insulating shoes, or stand on an insulating mat. When using Class II handheld electric tools in damp and confined spaces, install a residual current switch with an operating current of less than 1.5mA and an operating time of less than or equal to 0.1 seconds. The residual current switch should be placed inside the container and supervised by designated personnel. 6) Occupational hazards of using handheld electric tools. Arm vibration disease caused by long-term exposure to hand-transmitted vibration was listed as one of China's statutory occupational diseases in 1957, also known as local vibration disease, typically manifested as episodic white finger.

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