German HOMMEL-ETAMIC workpiece fixtures HOMMEL-ETAMIC model HOMMEL-ETAMIC price

HOMMEL-ETAMIC workpiece fixtures use hydraulic components to replace mechanical parts, achieving automatic positioning, support, and clamping of the workpiece through hydraulic control. They offer advantages such as high clamping force, reliable clamping, stable operation, and ease of use, and are currently widely used in scenarios such as CNC machine tools, machining centers, and automated production lines. By assembling selected hydraulic components with designed mechanical parts, the required fixture can be obtained. Hydraulic fixtures ensure accurate positioning and secure clamping of the workpiece at specified positions, and can reduce vibration and deformation during machining through floating supports. They can also utilize automatic control to press down and lift pressure plates, clearing the clamping position during machining. Hydraulic fixtures can withstand large cutting forces during rough machining, ensure accurate positioning during precision machining, and perform support, clamping, and quick release tasks that manual fixtures cannot accomplish.

HOMMEL-ETAMIC 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 installed on the spindle, while a minority are installed on the saddle or bed. 2) Coordinate measuring machine fixtures: Used on measuring machines, utilizing modular support and reference devices to achieve flexible fixation of the measured workpiece. This device allows for automatic programming 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 based on the geometric data of the workpiece. 3) Industrial robot fixtures: All installed on industrial robots for use in industrial automation equipment, representing one of the new technologies in modern industrial automation equipment. They mainly appear in modern industrial production in coordination with robots, with common applications including loading and unloading machine tools, palletizing and depalletizing workpieces, welding, grinding, and other automated unmanned factory operations. 4) Milling machine fixtures: All installed on milling machine tables, moving with the machine table for feed motion. They mainly consist of positioning devices, clamping devices, fixture bodies, connecting elements, and tool setting elements. During milling, cutting forces are large and cutting is intermittent, resulting in significant vibration; therefore, milling machine fixtures require high clamping force, stiffness, and strength. 5) Bearing housing fixtures: To ensure and improve the production quality of bearing housings, in addition to using 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. Bearing housing fixtures are specialized production tools 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. These bearing housing fixtures can accurately determine the relative position between the workpiece and the tool, allowing the workpiece to be clamped securely to complete the necessary motions during machining. Since bearing housing fixtures play a crucial role in the bearing housing production process, drawing their design diagrams is also very important.

HOMMEL-ETAMIC workpiece fixture features

Workpieces for small-batch, high-variety production account for approximately 85% of the total number of workpiece types. Modern production requires companies to frequently update their product varieties to meet market demands and competition. However, most companies are still accustomed to extensively using traditional dedicated fixtures. In factories with medium production capacity, there are typically thousands to nearly ten thousand dedicated fixtures. On the other hand, in companies with high-variety production, approximately 50~80% of dedicated fixtures need to be updated every 3~4 years, while the actual wear of these fixtures is only about 10~20%. To accommodate the application of new machining technologies such as CNC machine tools, machining centers, group technology, and Flexible Manufacturing Systems (FMS), machine tool fixtures have the following characteristics: 1) They can quickly and conveniently equip new products for production, shortening the production preparation cycle and reducing production costs; 2) They can clamp a group of workpieces with similar characteristics; 3) They are suitable for high-precision machine tool fixtures used in precision machining; 4) They are suitable for new types of machine tool fixtures applicable to various modern manufacturing technologies; 5) They adopt efficient clamping devices powered by hydraulic stations and other power sources to further reduce labor intensity and improve labor productivity; 6) They enhance the standardization level of machine tool fixtures. This is mainly reflected in four aspects: standardization, precision, efficiency, and flexibility.

HOMMEL-ETAMIC workpiece fixture classification

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 within 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 cup by downward squeezing force, creating a negative pressure state inside to hold the workpiece. They offer advantages such as 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 into 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, negative pressure forms inside the cup to hold the object. Conversely, when the control valve connects the suction cup to the atmosphere, the suction force is lost, releasing the workpiece. The suction force of vacuum pump suction cups mainly depends on the adsorption area of the suction cup and the vacuum degree inside the q cavity (referring to the thinness of the air). This type of suction cup offers reliable operation and 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-rod dual-cylinder translational gripper refers to the gripper fingers being mounted on a straight rod equipped with finger mounting seats. When pressurized gas enters the rod-side chambers of the two single-acting dual cylinders, the two pistons move towards 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 line. This type of end-effector is used in loading and unloading assembly workstations.

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