German tuenkers workpiece fixtures, tuenkers models, tuenkers prices

tuenkers workpiece fixtures are devices used in the manufacturing process to secure the workpiece in the correct position for machining or inspection, also known as jigs. Broadly speaking, any device used to quickly, conveniently, and safely install workpieces during any stage of the 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 of the tool to the workpiece or 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 often referred to simply as fixtures. When machining workpieces on machine tools, to ensure that the surface of the workpiece 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 (positioning) and securely clamped (clamping) before machining.

tuenkers Workpiece Fixture Classification

Due to the different operating characteristics and structural forms of various machine tools, different requirements are correspondingly imposed 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 classification includes 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 different operations.

tuenkers Workpiece Fixture Features

1) Suction force: Electrically controlled powerful magnetic chucks have extremely strong holding force, up to 16kg/cm², with uniform and adjustable magnetic field distribution, suitable for various heavy-duty machining, rough machining, and finish machining; ordinary powerful magnetic chucks have weaker and uneven suction force, unable to meet the requirements of heavy-duty machining operations. 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, thereby 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 magnetic force of the chuck, failing to guarantee machining precision. 3) Performance: Electrically controlled powerful magnetic chucks can be used continuously without any faults or maintenance required, even when operating continuously for more than 20 hours per day; ordinary permanent magnetic chucks experience a decline in suction force after about half a year of use, while electromagnetic chucks can only operate for a few hours each day, are prone to failures, and require frequent replacement and maintenance 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 in just 0.3 seconds with the simple press of a button, significantly improving production efficiency.

tuenkers Workpiece Fixture Classification

Mechanical gripping end-effectors applied in loading and 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 expanding types. Classified by mechanical structural characteristics, they can be divided into electric (electromagnetic), hydraulic, and pneumatic types, as well as their combinations. 1) Pneumatic suction type: Pneumatic suction robot end-effectors use the suction force generated by negative pressure inside the suction cup to hold 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 plates, paper, glass, and curved shells. Depending on the application, the end-effector can be designed with single, double, multiple, or specially shaped suction cups. Methods for forming 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 cup by downward squeezing force, creating a negative pressure state inside to hold the workpiece. They have advantages such as simple structure, light weight, and low cost. However, the suction force is not large, and 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 into a nozzle, forming a high-speed jet that removes air from the inner cavity of the suction cup, 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 inside the suction cup cavity is removed, forming negative pressure to hold the object. Conversely, when the control valve connects the suction cup to the atmosphere, the suction cup loses suction force and releases the workpiece. The suction force of vacuum pump suction cups mainly depends on the size of the suction area and the degree of vacuum inside the q cavity (referring to the thinness of the air inside). This type of suction cup is reliable and has large suction force, but requires a vacuum pump and airflow control system, resulting in higher costs. 2) Mechanical clamping type: The structure of a straight-bar dual-cylinder translational gripper refers to the gripper fingers installed on a straight bar 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. To ensure synchronous movement of the two pistons, a flow divider valve is installed in the cylinder's intake path. This type of end-effector is used in loading and unloading assembly workstations.

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