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Browse Prior Art Database

Clamping Mechanism

IP.com Disclosure Number: IPCOM000051639D
Original Publication Date: 1981-Feb-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 3 page(s) / 47K

Publishing Venue

IBM

Related People

Ashenmacher, GE: AUTHOR

Abstract

The clamping mechanism comprises clamp 10 adapted to engage and lock with fixture 12 for the purpose of holding a stack 14 of parts together so that the parts may be cemented together (by baking) while so held.

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Clamping Mechanism

The clamping mechanism comprises clamp 10 adapted to engage and lock with fixture 12 for the purpose of holding a stack 14 of parts together so that the parts may be cemented together (by baking) while so held.

Stack 14 may include, for example, ceramic plate 16, ferrite components 18, 20 and 22, and ceramic plate 23 that are to be cemented together for making a sub-assembly of a magnetic head.

Clamp 10 is formed with an upstanding positioning tongue 24, a pair of upstanding stabilizing ribs 25, a pair of yieldable arms 26 and 28, and a pair of downwardly extending claw portions 30 and 32. Plate 34 is held in position on the lower surface of clamp 10 by claw portions 30 and 32, and spring 36 in central cavity 38 formed in clamp 10 is supported by plate 34. Spring 36 provides an upward force on plunger 40, provided in cavity 38, through the intermediary of sleeve 42 and screw 44. Spring 36 bears on the flanged lower end of sleeve 42, and screw 44 is threaded in sleeve 42 so that the force exerted by spring 36 may be varied when plunger 40 is at a particular vertical position in cavity 38.

The adjacent surfaces of arms 26 and 28 are at a distance b/b apart, and arms 26 and 28 as well as the rest of clamp 10 are formed of a relatively yieldable material such as nylon so that arms 26 and 28 may be sprung apart against the natural flexibility of the arms. Arms 26 and 28 are provided with upper rounded declining surfaces 46 and with lower declining flat locking taper surfaces 48. Surfaces 48 extend upwardly from the conjunction of the surfaces 48 with the inner surfaces of the arms 26 and 28 by the small angle of 6 degrees, for example, measured from horizontal or transverse lines 49.

Clamp 10 is moved upwardly, as seen in the figure, to engage fixture 12 to hold part stack 14 together under pressure, and fixture 12 is provided with groove 50 on its back side for receiving rib 24 when clamp 10 is so moved onto fixture
12. Fixture 12 is provided with boss 52 having part clamping rib 54, cam surfaces 58 and 60, and wedging or locking taper surfaces 62 and 64. Surfaces 62 and 64 extend at the same small angle of 6 degrees with respect to horizontal or transverse, as shown in the figure, as do the surfaces 48, and surfaces 58 and 60 extend at an angle of 45 degrees, for example, with respect to horizontal or transverse.

In order to clamp stack 14 in position ready for cementing, parts 16, 18, 20, 22 and 23 are held in alignment. Clamp 10 is then moved onto fixture 12, with rib 24 entering groove 50 and ribs 25 engaging side surfaces 12a of fixture 12 to stabilize the assembly with plunger 40 prior to having made contact with stack 14 to stabilize stack 14. The surfaces 46 of arms 26 and 28 make contact with surfaces 58 and 60 of fixture 12, and arms 26 and 28 are thus sprung apart. On continued movement of clamp 10 onto fixture 12, arms 26 and 28 move together, with...