German fritz weg workpiece fixtures, fritz weg models, fritz weg prices

fritz weg workpiece fixtures are electromagnetic fixtures that secure the workpiece being machined by means of the suction force generated by the chuck body when the electromagnetic coil is energized. An electromagnetic chuck consists of several parts, including a core, coil, faceplate, and bracket. The electromagnet, formed by the coil and core, is the main component of the electromagnetic chuck. Electromagnetic chucks vary depending on design methods or materials used, and they continue to evolve and improve. Initially, electromagnetic chucks were used on grinding machines to replace clamping plates and bolts for securing workpieces to be ground. Such electromagnetic chucks are relatively simple and can only secure flat workpieces. This is the traditional electromagnetic chuck, which has significant limitations in its application. With industrial development, the demand for electromagnetic tools from enterprises has grown, and requirements have become higher, prompting a series of improvements to electromagnetic chucks to meet production needs.

fritz weg workpiece fixture classification

1) Lathe fixtures: Fixtures used on lathes to machine internal and external rotary surfaces and end faces of workpieces are called lathe fixtures. Most lathe fixtures are mounted on the spindle, while a minority are installed on the saddle or bed. 2) CMM fixtures: Used on coordinate measuring machines, these utilize modular support and reference devices to achieve flexible fixation of the measured workpiece. The device can be automatically programmed to support the workpiece and establish an unlimited number of workpiece configuration reference points. Advanced dedicated software can directly generate workpiece clamping programs within seconds using the workpiece's geometric data. 3) Industrial robot fixtures: Mounted on industrial robots for use in industrial automation equipment, representing one of the newer technologies in modern industrial automation. They primarily appear in modern industrial production in coordination with robots, with common applications in automated unmanned factories for machine loading/unloading, workpiece palletizing/depalletizing, welding, and grinding. 4) Milling machine fixtures: Installed on the milling machine table, moving with the table during feed motion. They mainly consist of positioning devices, clamping devices, fixture bodies, connecting elements, and tool-setting elements. During milling, cutting forces are high and cutting is intermittent, resulting in significant vibration; therefore, milling fixtures require high clamping force, as well as high rigidity and strength. 5) Bearing housing fixtures: To ensure and improve the production quality of bearing housings, in addition to machine tools and other mechanical equipment, a large amount of process equipment is used, including bearing housing fixtures, molds, cutting tools, and related auxiliary tools. A bearing housing fixture is a production tool specifically designed to ensure the product quality of bearing housings, making the production process more convenient. Different bearing housing fixtures vary in structure, form, operating conditions, and design principles, resulting in a wide variety of types and styles, accounting for a significant proportion in both quantity and variety. This type of bearing housing fixture can accurately determine the relative position between the workpiece and the tool, i.e., it can clamp the workpiece to be machined, thereby enabling the motions required during the machining process. Since bearing housing fixtures play a very important role in the bearing housing production process, the drafting of bearing housing fixture designs is also very important.

fritz weg workpiece fixture features

1) Standardization: The standardization and generalization of machine tool fixtures are two interrelated aspects. China already has national standards for fixture parts and components: GB/T2148~T2259－91, as well as standards for various general-purpose fixtures, modular fixtures, etc. The standardization of machine tool fixtures facilitates the commercial production of fixtures, helps shorten the production preparation cycle, and reduces the total production cost. 2) Precision: As the precision of mechanical products continues to improve, the precision requirements for fixtures must correspondingly increase. There are many structural types of precision fixtures. For example, multi-tooth discs used for precision indexing can achieve an indexing accuracy of ±0.1"; high-precision three-jaw self-centering chucks used for precision turning have a centering accuracy of 5μm. 3) High efficiency: High-efficiency fixtures are mainly used to reduce the basic time and auxiliary time for workpiece machining, thereby increasing labor productivity and reducing workers' labor intensity. Common high-efficiency fixtures include automated fixtures, high-speed fixtures, and fixtures with clamping force devices. For example, using electric vises on milling machines to clamp workpieces can increase efficiency by approximately 5 times; using high-speed three-jaw self-centering chucks on lathes ensures that the jaws can still firmly clamp the workpiece at a test speed of 9000r/min, thereby significantly increasing the cutting speed. In addition to configuring corresponding high-efficiency and automated fixtures in production lines and automatic lines, various fixtures for automatic workpiece clamping and devices for automatic fixture changing have appeared on CNC machine tools, especially on machining centers, fully leveraging the efficiency of CNC machine tools. 4) Flexibility: The flexibility of machine tool fixtures is similar to that of machine tools. It refers to the ability of machine tool fixtures to adapt to variable process factors through adjustment, combination, and other methods. The main variable process factors include: operation characteristics, production batch size, workpiece shape and dimensions, etc. New types of fixtures with flexible characteristics mainly include: modular fixtures, general-purpose adjustable fixtures, group fixtures, modular fixtures, and CNC fixtures. To meet the needs of modern mechanical industry for multi-variety and small-to-medium batch production, expanding the flexibility of fixtures, changing the non-disassemblable structure of special-purpose fixtures to a disassemblable structure, and developing adjustable fixture structures will be the main direction of current fixture development.

fritz weg workpiece fixture classification

The mechanical gripping end-effectors applied in loading/unloading industrial robots are mostly two-finger grippers. Classified by finger motion, they can be divided into translational and rotational types. Classified by mechanical gripping method, they can be divided into external clamping and internal expansion types. Classified by mechanical structural characteristics, they can be divided into electric (electromagnetic), hydraulic, and pneumatic types, as well as their combinations. 1) Vacuum suction type: Vacuum suction robot end-effectors use the suction force generated by negative pressure inside the suction cup to pick up and move workpieces. The suction cup creates negative pressure in a bellows made of soft rubber or plastic to hold the workpiece. This type of robot end-effector is suitable for handling large, thin, low-rigidity metal or wooden sheets, paper, glass, and curved shells. Depending on the application, the end-effector can be configured with single, double, multiple, or specially shaped suction cups. Methods for generating negative pressure include: squeeze-type suction cups, airflow negative pressure suction cups, and vacuum pump exhaust suction cups. Squeeze-type suction cups: Squeeze-exhaust suction cups expel all air from the suction cup by downward squeezing force, creating a negative pressure state inside to hold the workpiece. Advantages include simple structure, light weight, and low cost. However, the suction force is not large, so they are mostly used for workpieces that are not too large in size, thin, and light. Airflow negative pressure suction cups: An airflow control valve injects compressed air from an air pump through a nozzle, forming a high-speed jet that removes air from the suction cup cavity, creating negative pressure to hold the object. If compressed air is available at the job site, using this type of suction cup is convenient and low-cost. Vacuum pump exhaust suction cups: Vacuum pump exhaust suction cups connect the vacuum pump to the suction cup via an electromagnetic control valve. When the control valve evacuates air, the air in the suction cup cavity is removed, creating negative pressure to hold the object. Conversely, when the control valve connects the suction cup to the atmosphere, the suction cup loses suction and releases the workpiece. The suction force of vacuum pump suction cups mainly depends on the suction area and the vacuum level inside the q cavity (referring to the rarefaction of air inside). This type of suction cup is reliable and provides strong suction, but requires a vacuum pump and airflow control system, resulting in higher costs. 2) Mechanical gripping type: Structure of a straight-bar dual-cylinder translational gripper. The gripper fingers are mounted on a straight bar equipped with finger mounting seats. When pressurized gas enters the rod-side chambers of the two single-acting dual cylinders, the two pistons move toward the center, clamping the workpiece; when no pressurized gas enters, springs push the two pistons outward, releasing the workpiece. A flow divider valve is installed in the cylinder intake line to ensure synchronized piston movement. This type of end-effector is used in loading/unloading assembly workstations.

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