초록 ▼

The fixture for supporting workpiece of any shape in automatic machining lines according to the invention has a multiplicity of parallel pins with vertical axes, arranged according to a regular pattern in parallel rows, slidably lodged in correpsonding holes made in a pair of spaced apart parallel s

The fixture for supporting workpiece of any shape in automatic machining lines according to the invention has a multiplicity of parallel pins with vertical axes, arranged according to a regular pattern in parallel rows, slidably lodged in correpsonding holes made in a pair of spaced apart parallel support plates, protruding in their rest position from the upper side of the plate by a value equal or bigger than the maximum depth of the planned impression, having frictional elements for locking in the axial position assumed by the pins as a result of the action of the impression-forming unit. A device for resetting the rest positions of the pins is also provided for the cancellation of the impression.

대표청구항 ▼

An assembly for supporting a workpiece for machining in an automatic machining line, said assembly comprising: a pair of parallel, spaced apart support plates formed with mutually registering holes in a regular pattern of spaced-apart rows of holes spaced from on another along a respective row; resp

An assembly for supporting a workpiece for machining in an automatic machining line, said assembly comprising: a pair of parallel, spaced apart support plates formed with mutually registering holes in a regular pattern of spaced-apart rows of holes spaced from on another along a respective row; respective pins received in registering holes of said support plates and having axes perpendicular to said support plates, whereby said pins are disposed in a grid-like array in mutually spaced relation along respective mutually parallel rows with the rows of pins being mutually spaced apart transversely of the pin rows, said pins projecting from an upper one of said support plates in extended rest positions of said pins by a distance greater than a maximum depth of an impression to be formed by said array of pins to receive a workpiece, said pins being axially slidable from said rest position into retracted impression-forming positions relative to said support plates to form said impression; and means for frictionally arresting said pins in respective extended and retracted positions, said support plates, said pins and said means for frictionally arresting said pins forming a fixture displaceable with a workpiece received in the respective depression along said machining line, said means for frictionally arresting said pins comprising an elastic element disposed between rows of said pins and bearing continuously frictionally transversely directly on said pins to exert a friction force thereon greater than axial forces applied to said pins during support or a workpiece thereon, but less than force applied to said pins to form said impression and force applied to said pins to restore said pins to respective rest positions thereof, each of said elements being a strip forming a lamellar spring having notches along opposite longitudinal edges bearing on the pins of one row and a curved web between the notches along said longitudinal edges bearing on the pins of another row to generate said friction force on said pins while permitting axial sliding of said pins between the respective positions thereof.