German Amtec workholding fixtures Amtec model Amtec price

Amtec workholding fixtures refer to devices used in the mechanical 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 a workpiece 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 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 (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 the fixture body (fixture base). 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 a workpiece on a machine tool, to ensure that the surface of the workpiece meets the technical requirements specified in the drawing, such as dimensions, geometric shape, and mutual positional accuracy with other surfaces, the workpiece must be properly located (positioning) and securely held (clamping) before machining.

Amtec workholding fixture classification

1) Lathe fixtures: Fixtures used on lathes to machine the 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 mounted 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 for automatic programming to support the workpiece and can establish an unlimited number of workpiece configuration reference points. Advanced dedicated software can directly generate the workpiece clamping program within seconds using the workpiece's geometric data. 3) Industrial robot grippers: 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: Mounted on the milling machine table, moving with the table during feed motion. They mainly consist of locating devices, clamping devices, the fixture body, connecting elements, and tool-setting elements. During milling, cutting forces are high and the 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 specialized production tool 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, which account 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, meaning it can clamp the workpiece to be machined, thereby enabling the necessary movements 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 design drawings is also crucial.

Amtec workholding fixture features

Mechanical grippers commonly use compressed air as the power source, achieving finger movement 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/closing 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/closing type: In this type of gripper, the two fingers perform parallel opening and closing movements during operation, while the motion trajectory of the finger tips is an arc. The illustrated gripper shows two scenarios where a parallelogram transmission mechanism drives the parallel opening and closing of the fingers. 3) Linear parallel-opening/closing 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 the 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 at 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.

Amtec workholding fixture applications

1) Consistently ensures workpiece machining accuracy: When clamping a workpiece with a fixture, 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; workpieces do not require scribing and alignment, significantly reducing auxiliary time. Clamping the workpiece in a fixture increases its 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 a boring template on the carriage of a lathe or the table of a radial drilling machine allows for boring operations on box-type parts. 4) Ensures machining accuracy: Installation using fixtures allows for accurate determination of the mutual positions between the workpiece, machine tool, and cutting 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) Increases productivity and reduces costs: Clamping workpieces with fixtures allows for rapid positioning and clamping without alignment, significantly reducing auxiliary time. Clamping with fixtures increases workpiece rigidity, allowing for higher cutting parameters. Multi-workpiece and multi-station fixtures can be used, along with high-efficiency clamping mechanisms; these factors all contribute to improved labor productivity. Additionally, the use of fixtures stabilizes product quality and reduces the scrap rate, allowing for the assignment of workers with lower skill levels, significantly lowering production costs. 6) Expands the process range of machine tools: The use of 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 template fixtures on a lathe or radial drilling machine, boring operations can be performed on hole systems of box-type parts; special-purpose fixtures can also convert a lathe for use as a broaching machine, 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 can be reduced.

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