German Bohle workholding fixtures Bohle model Bohle price

Bohle workholding fixtures are machine tool accessories manufactured based on the electromagnetic principle: energizing internal coils generates magnetic force, which passes through a magnetically permeable panel to firmly hold workpieces in contact with the panel surface; de-energizing the coils eliminates the magnetic force, demagnetizing the unit to allow workpiece removal. Primary applications include workpiece fixation during machining of ferrous workpieces on grinding machines, electromagnetic knife grinders, gantry milling machines, and gantry planers. Rectangular electromagnetic chucks have lifting threaded holes on both sides; T-head screws can be screwed in for lifting, and T-head blocks and screws are used to secure the chuck to the workbench. Connect the DC power supply and ground wire from the machine tool, then precision grind the top surface of the chuck once to ensure parallelism between the top and bottom surfaces. When holding workpieces, sufficient positioning holding force is achieved by bridging two adjacent magnetic poles, allowing grinding operations. Magnetization and demagnetization of the workpiece can be controlled via the machine tool buttons.

Bohle workholding fixture introduction

Vacuum suction cups are one type of actuator for vacuum equipment. The suction cup material is made of nitrile rubber, which has high tensile strength, making it widely used in various vacuum holding devices. It is used in industries such as construction, paper manufacturing, printing, and glass to handle and transport thin and light items like glass and paper. Vacuum suction cups are also known as vacuum lifters or vacuum nozzles. Generally, using vacuum suction cups to grab products is the most cost-effective method. There is a wide variety of vacuum suction cups. Rubber suction cups can operate at high temperatures. Suction cups made of silicone rubber are very suitable for gripping products with rough surfaces. Suction cups made of polyurethane are highly durable. In actual production, if oil resistance is required for the suction cup, materials such as polyurethane, nitrile rubber, or vinyl-containing polymers can be considered. Typically, to avoid scratching the product surface, it is best to choose suction cups with bellows made of nitrile rubber or silicone rubber.

Bohle 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 divided 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 uses a parallelogram transmission mechanism to drive the parallel opening and closing of the fingers in two scenarios. 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 always remain parallel. 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, the rollers mounted at its end move within the cam slots, achieving parallel clamping movement 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.

Bohle workholding fixture classification

1) Base components: such as square, rectangular, and circular base plates, used as fixture tooling tables. All five working faces of the worktable feature grid-marked holes. The flatness, parallelism, and perpendicularity tolerances of these five faces, as well as the positional accuracy of the holes, are very high, ensuring sufficient accuracy for positioning on the table and for combining the table with other modules. Base table dimensions can be selected freely, and special sizes can be custom-made. If high accuracy is required after combining tables, guide rails can be used to connect them. 2) Supporting components: including U-type angle plates, L-type angle plates, support angles, angle connection blocks, angle gauges, frame-style support bases, etc.; used for height positioning or platform expansion, as well as for positioning or clamping other accessories. These are components such as shims, spacer plates, support plates, support blocks, and extension plates that are positioned on the platform to ensure workpieces meet specific height requirements during machining, primarily serving as supports at different heights. 3) Positioning components: including positioning squares, positioning straight edges, surface squares, V-type positioning devices, and eccentric circle stops; used to accurately adjust positioning location or height. These are components that precisely position workpieces to ensure they meet specific dimensional accuracy requirements during machining; used to determine the relative positions between components and between components and workpieces. 4) Adjustment components: including height adjusters and adjustment shims; purpose: components used to adjust positional differences and gaps between components and workpieces. 5) Clamping components: including: 90° spiral clamps, horizontal spiral clamps, 45° spiral clamps, vertical quick-action clamps, horizontal push-type quick-action clamps; purpose: components used to clamp workpieces to the platform or base elements to prevent displacement during machining. 6) Locking components: including: quick-locking pins, countersunk quick-locking pins, countersunk locking pins, handle quick-locking pins, locating pins, connection lock magnetic pins, hex socket locking pins, hex head locking pins, magnetic pins; purpose: components used for positioning and locking between elements. 7) Assembly components: including: 90-degree clamping angle brackets, 45-degree clamping angle brackets, parallel clamping angle brackets, vertical clamping angle brackets, standard support legs, swivel castor support legs with brakes, fixed support legs, frame-structure support bases, hydraulic lift support bases, support rails; purpose: components acting to connect or support elements and other parts. 8) Other components: including: retaining rings, grounding devices, spiral clamps, pipe clamps, lifting eyes, cross-recessed pressure pads, two-point clamping bridges, three-point clamping bridges, multi-purpose support templates, platform guard plates, tool trolleys; purpose: auxiliary components for assembling tooling elements. 9) Assembly tools: including hex keys, oilstones, magnetic pliers, and other assembly tools.

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