German berg workpiece fixtures berg models berg prices

berg workpiece fixtures are devices used in the mechanical manufacturing process to secure the workpiece in the correct position for machining or inspection, also known as clamps. In a broad sense, any device used to quickly, conveniently, and safely install workpieces during any step of the process can be called a fixture. Fixtures typically consist of locating elements (to determine the correct position of the workpiece in the fixture), clamping devices, tool-setting guide elements (to determine the relative position of the tool and workpiece or guide the tool direction), indexing devices (to allow the workpiece to undergo 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 referred to simply as fixtures. When machining workpieces on machine tools, to ensure that the workpiece surface meets the technical requirements specified in the drawings, such as dimensions, geometric shape, and mutual positional accuracy with other surfaces, the workpiece must be properly located (positioning) and securely clamped (clamping) before machining.

berg Workpiece Fixture Classification

1) Lathe fixtures: Fixtures used on lathes to machine internal and external rotational 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, utilizing modular support and reference devices to achieve flexible fixation of the measured workpiece. This device allows 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 workpiece's geometric data. 3) Industrial robot fixtures: Mounted on industrial robots for use in industrial automation equipment, representing one of the new 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 tool loading/unloading, workpiece palletizing/depalletizing, welding, grinding, etc. 4) Milling machine fixtures: Installed on the milling machine table, moving with the table during feed motion. They mainly consist of locating devices, clamping devices, fixture bodies, connecting elements, and tool-setting elements. During milling, cutting forces are high and cutting is intermittent, causing 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. 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 diversity. These fixtures accurately determine the relative position between the workpiece and the tool, allowing the workpiece to be clamped securely to perform the necessary motions during machining. Since bearing housing fixtures play a crucial role in the production process, drawing their design diagrams is also very important.

berg Workpiece Fixture Features

Mechanical grippers commonly use compressed air as the power source, achieving finger motion through a transmission mechanism. Based on the different motion trajectories of the fingers when clamping the workpiece, mechanical grippers are classified into: 1) Arc-opening type: Driven by the transmission mechanism, the motion trajectory of the finger tips is an arc. This type of gripper has strict requirements for the dimensions of the clamped part of the workpiece; otherwise, it may cause abnormal workpiece status. 2) Arc-parallel opening type: In this type of gripper, the two fingers perform parallel opening and closing motions during operation, while the motion trajectory of the finger tips is an arc. The illustrated gripper shows two cases where a parallelogram transmission mechanism drives the parallel opening and closing of the fingers. 3) Linear-parallel opening type: The motion trajectory of the two fingers in this type of gripper is linear, and the clamping surfaces of the two fingers remain parallel at all times. A cam mechanism is used to achieve parallel opening and closing of the two fingers; inclined cam slots are machined into the sliding blocks of each finger. When the piston rod moves up and down, rollers mounted on its end move within the cam slots, achieving parallel clamping motion of the fingers. Alternatively, a rack-and-pinion mechanism is used: when the rack at the end of the piston rod drives the gear to rotate, the racks on the fingers move linearly, causing the two fingers to open and close in parallel to clamp the workpiece.

berg Workpiece Fixture Applications

1) Consistently ensures workpiece machining accuracy: When clamping workpieces with fixtures, the positional accuracy of the workpiece relative to the tool and machine tool is guaranteed by the fixture, unaffected by the worker's skill level, ensuring consistent machining accuracy for a batch of workpieces. 2) Reduces auxiliary time and improves labor productivity: Using fixtures makes workpiece clamping convenient and fast, eliminating the need for layout and alignment, significantly reducing auxiliary time; clamping workpieces in fixtures increases workpiece rigidity, allowing for higher cutting parameters; fixtures capable of clamping multiple workpieces or multiple stations can be used, along with high-efficiency clamping mechanisms, further improving labor productivity. 3) Expands the usage range of machine tools, achieving multi-functionality: By attaching different types of fixtures according to the forming motion of the machining machine tool, the original process range of the machine tool can be expanded. For example, installing boring jigs on the carriage of a lathe or the table of a radial drilling machine enables boring operations on box-type parts. 4) Ensures machining accuracy: Using fixtures for installation allows accurate determination of the mutual positions between the workpiece, machine tool, and tool. The positional accuracy of the workpiece is guaranteed by the fixture, unaffected by the worker's skill level, resulting in high and stable machining accuracy. 5) Improves productivity and reduces costs: Clamping workpieces with fixtures allows rapid positioning and clamping without alignment, significantly reducing auxiliary time; clamping increases workpiece rigidity, enabling higher cutting parameters; multi-workpiece and multi-station fixtures can be used with high-efficiency clamping mechanisms, all of which contribute to improved labor productivity. Additionally, using fixtures stabilizes product quality, reduces scrap rates, allows the assignment of lower-skilled workers, and significantly lowers production costs. 6) Expands the process range of machine tools: Using special-purpose fixtures can change the original purpose of the machine tool and expand its usage range, achieving multi-functionality. For example, after installing boring jig fixtures on lathes or radial drilling machines, boring operations on hole systems of box-type parts can be performed; special-purpose fixtures can also convert lathes for broaching operations, fully leveraging the capabilities of general-purpose machine tools. 7) Reduces worker labor intensity: Clamping workpieces with fixtures is convenient and fast; when pneumatic, hydraulic, or other clamping devices are employed, worker labor intensity is reduced.

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