Expansion Locating Pin Mode l Mode l VRA VRC Zero Clearance between the Pin and Reference Hole Locating Repeatability Within 3μm Durability of Ten Million Cycles W h e n U s i n g V R A B e f or e PAT. Af t e r Wobbling Round Pin Backlash Diamond Pin Cut Pin No Backlash Datum Pin Released (Loading/Unloading ) Enough Clearance Locked (Locating ) Zero Clearance Expands Backlash due to the Clearance Air 121 General Locating Pin Expansion Locating Pin Non-Constant Accuracy (Depends on the clearance.) Constant Accuracy with Zero Clearance Difficult to Load/Unload Released Easy to Load/Unload Backlash due to the Clearance Locked Hold with Zero Clearance
Advantages Action Description Application Examples Model No. Indication Specifications External Dimensions Cautions Locating High Quality Cost Reduction After High Accuracy Locating Pin enables high accuracy machining / cost reduction in alignment equipment. High Accuracy Locating Clamp Locating Clamp Support Zero Clearance Valve Coupler Expansion locating pin expands and the clearance between the pin and reference hole becomes zero which leads to high Cautions Others accuracy locating. Also locking from the inside of the hole Pneumatic Expansion Locating Pin (Smaller) enables zero backlash. VR A /VR C Locating Repeatability 3μｍ When Locked Pneumatic Expansion Locating Pin VW M VW K After Cost Reduction Cost Reduction in Aligning Equipment Improvement in locating accuracy enables cost reduction in accuracy-alignment equipment for computer vision and improves operation of manual systems. Manual Expansion Locating Pin VX Screw Locator VXF Improvement in Locating Accuracy B e f or e Backlash due to the Clearance General Locating Pin Locating accuracy of general locating pin depends on clearance between the pin and reference hole. Also it leads to inaccuracy of work and construction. Productive Improvement in loading/unloading function avoids loading/unloading errors. Enough Clearance After Optimum Clearance for Loading When releasing the clearance between the pin and reference hole is large enough for smooth loading/unloading and conveyance automation. When Released B e f or e Locating Accuracy and Loading Improving locating accuracy of general locating pin causes Small clearance leads to damage. inefficiency in loading/unloading. It is impossible to manage both high locating accuracy and loading/unloading efficiency. 122
Expansion Locating Pin m od e l VRA/ V RC Action Description Loa d i ng/unl oa d ing Gripper Air Pressure for Releasing Built-in Spring When Loading/Unloading (Released) ＯＮ Release Air Pressure When Locating (Locked) Release Air Pressure ＯＦＦ Releasing with Air Supply Expanding with Built-in Spring Release action (pin diameter reduced) is When air pressure is OFF (air venting), processed by air supply. the diameter of pin expands with the built-in spring and locates the workpiece. General locating pin consists of round pin and diamond-shaped pin. Alike general locating pin, D: datum pin (equivalent to round pin) contacts with 3 points on hole for reference locating. C: cut pin (equivalent to diamond-shaped pin) contacts with 2 points on hole for one direction locating. VR -D Datum Pin Contacts with 3 Points on Hole Contacts with 2 Points on Hole For Reference Locating For One Direction Locating indicates the locating direction (gripper part). indicates the locating direction (fixation locating part). 123 VR -C Cut Pin
Advantages Action Description Application Examples Model No. Indication Specifications External Dimensions Cautions Locating Application Examples Clamp Locating Clamp Support Valve Coupler Cautions Others Pneumatic Expansion Locating Pin (Smaller) VR A /VR C For Locating For Pallet Changeover Pneumatic Expansion Locating Pin VW M VW K Manual Expansion Locating Pin VX Screw Locator VXF For Pick and Place with Transfer System or Table Robot For Locating Pallet of Table Robot Check the gripper expanding force. Enough Clearance Suitable for Loading/Unloading Automation with Enough Clearance at Released State 124
VRA 040 0 - D φ φ φ φ φ 125
φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ 126
φ φ φ φ φ φ φ φ φ 127
φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ 128
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