Punching tool
AssigneeMate Precision Tooling, Inc.
InventorAlbrecht Schneider
Life of this patent
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Abstract
A punching tool has a guided, axially displaceable die plunger, which is fixed against relative rotation, in a guide bushing. In a bore in its front end a punching die is seated. During the punching stroke the punching die rests against a front face of the die plunger and is axially fixed in place by means of one or several snap-in balls, each of which is seated in a transverse bore, which snap-in balls are maintained in engagement with an annular groove by means of a spring washer in the die plunger. The outer diameter of the spring washer is only slightly less in the engagement position than the inner diameter of the guide bushing and can be elastically widened for releasing the punching die outside of the guide bushing.
Claims10
A punching tool, having a guided, axially displacable die plunger, which is fixed against relative rotation, in a guide bushing and having a bore in the front end in which a punching die can be axially fixed, the bore provided with an annular groove, holding elements which releasably engage the annular groove, wherein during the punching stroke the punching die rests against a front face of the die plunger and can be axially fixed in place by holding elements in the form of snap-in balls, each of which is seated in a transverse bore in the front end of the die plunger and which are maintained in engagement with the annular groove by means of a spring washer, the outer diameter of which spring washer is less in the engagement position than the inner diameter of the guide bushing and which spring washer can be widened to a diameter greater than the inner diameter of the guide bushing when the die plunger is removed from the guide bushing.
Dependencies are inferred from the claim text.