kroschke fixtures Germany kroschke models kroschke prices

kroschke fixtures refer to devices used in the mechanical manufacturing process to secure workpieces, ensuring they occupy the correct position for machining or inspection; they are also known as clamps. Broadly speaking, any device used to quickly, conveniently, and safely install workpieces during any step of the technological process can be called a fixture. Fixtures typically consist of locating elements (to determine the correct position of the workpiece within the fixture), clamping devices, tool-setting guide elements (to determine the relative position between the tool and the workpiece or to guide the tool direction), indexing devices (enabling the workpiece to complete machining at several stations in a single setup, including rotary indexing devices and linear indexing devices), connecting elements, and fixture bodies (fixture bases). Examples include welding fixtures, inspection fixtures, assembly fixtures, and machine tool fixtures, among which machine tool fixtures are the most common and are often simply referred to as fixtures. When machining workpieces on machine tools, to ensure the workpiece surface meets technical requirements such as dimensions, geometric shape, and mutual positional accuracy with other surfaces as specified in the drawings, the workpiece must be properly located (positioned) and securely clamped (clamped) before machining.

kroschke fixture classification

Due to the different operating characteristics and structural forms of various machine tools, different requirements are correspondingly placed on the structure of the fixtures used. According to the machine tools used, fixtures can be divided into: lathe fixtures, milling machine fixtures, drilling machine fixtures, boring machine fixtures, grinding machine fixtures, gear machine tool fixtures, and other machine tool fixtures. Based on the clamping power source adopted by the fixture, they can be divided into: manual fixtures, pneumatic fixtures, hydraulic fixtures, pneumatic-hydraulic fixtures, electric fixtures, magnetic fixtures, and vacuum fixtures. Specialized classifications include general-purpose fixtures, special-purpose fixtures, general-purpose adjustable fixtures, group fixtures, modular fixtures, and pallet fixtures. Pallet fixtures are fixtures used on automated lines. Such fixtures not only serve to clamp the workpiece but also become integrated with the workpiece, moving from one station to the next along the automated line for processing at different stages.

kroschke fixture features

1) Suction force: Electrically controlled powerful magnetic chucks offer superior holding force, with a maximum of 16kg/cm², uniform and adjustable magnetic distribution, suitable for various heavy-duty machining, roughing, and finishing operations; ordinary powerful magnetic chucks have weaker and uneven suction force, unable to meet the requirements of heavy-duty machining. 2) Machining precision: The holding force of electrically controlled powerful magnetic chucks does not require a continuous power supply to maintain, generating no heat during continuous operation, thus avoiding thermal deformation of the workpiece. Meanwhile, the strong and uniform surface suction ensures the highest machining precision even if the workpiece extends beyond the table surface; whereas ordinary electromagnetic chucks require a continuous current supply, generating heat after a period of operation, which not only causes thermal deformation of the workpiece but also reduces the chuck's magnetic force, failing to guarantee machining precision. 3) Performance: Electrically controlled powerful magnetic chucks can be used continuously; even with daily continuous operation for over 20 hours, no failures occur, and no maintenance is required; ordinary permanent magnetic chucks show a decline in suction force after about half a year of use, while electromagnetic chucks can only operate for a few hours a day, are prone to malfunctions, and require frequent replacement and repair of internal components. 4) Operational efficiency: Using ordinary powerful magnetic chucks requires significant time for workpiece adjustment, accounting for 40%-50% of the entire machining process, and clamping positioning is prone to obvious errors, resulting in high scrap rates and very low efficiency; electrically controlled powerful magnetic chucks feature automatic auxiliary positioning, completing workpiece clamping or release with a simple button press in 0.3 seconds, significantly improving production efficiency.

kroschke fixture usage

With the continuous development of China's industry, electromagnetic chucks are increasingly widely used in industrial production. The most important aspect of an electromagnetic chuck is its parameters; among the performance parameters, the lifting capacity and duty class are the most critical. The so-called lifting capacity of an electromagnetic chuck refers to the maximum weight of the load allowed to be lifted under specified operating conditions, also known as the rated lifting capacity. Generally, for cranes equipped with an electromagnetic chuck, the lifting capacity should also include the weight of the electromagnetic chuck itself. Rectangular electromagnetic chucks have lifting threaded holes on both sides. During installation, simply screw in T-shaped screws for lifting. Secure it to the workbench using T-shaped blocks and screws, connect the DC power supply and ground wire from the machine tool, and then perform a precision grind on the upper surface of the chuck to ensure the parallelism between the upper surface and the bottom surface. When holding workpieces, sufficient positioning and holding force can be obtained by bridging two adjacent magnetic poles, allowing grinding operations to proceed. Magnetization and demagnetization of the workpiece can be controlled via the machine tool buttons. Before use, wipe the surface of the electromagnetic chuck clean to avoid scratches. Avoid severe impacts to prevent affecting accuracy. After use, clean it thoroughly and apply anti-rust oil to prevent corrosion. When using the electromagnetic chuck independently, a ground wire must be connected to prevent electric shock due to leakage.

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