Single cut die set
OwnerAlexander Borzyminventor
Life of this patent
Estimating the term…
Abstract
Single blade, single cut tubing cut-off apparatus moves a blade along a first path of travel in which a first portion of the blade pierces the tubing and a second path of travel in which a second portion of the blade completes the cut, all in a concerted process. Motion of the blade is controlled by a cam and follower. The tubing is clamped for cutting by a pair of pivotably mounted jaws opened and closed by spring biased cam action.
Claims11
A single blade, single stroke cutoff device for a tube cutting machine, said device comprising:
- a cutoff blade mounted transaxially with respect to the tube and having a tip adapted to pierce the tube and at least one cutting edge adapted to sever the tube;
- and
- means for moving the blade along a concerted path of travel, said path having:
- a first component wherein the tip moves in a first direction along at least part of a first chord of a circular cross section of the tube to effect piercing thereof;
- and
- a second component wherein the tip moves in a second direction along at least part of a second chord of said circular cross section of the tube to effect severing of the tube by said at least one cutting edge, said second direction of tip movement being disposed at an acute angle with respect to said first direction of tip movement.
A clamping device for clamping an elongated workpiece, said device comprising:
- a pair of opposed die jaws for clamping the workpiece therebetween;
- means for mounting each jaw to a base for pivotal movement of said jaws between an open release position and a closed clamping position, said means having an interior workpiece facing surface and an opposed exterior surface, said exterior surface including a camming surface extending along at least a portion thereof;
- and
- means for urging each of said jaws to the closed clamping position including
- a pair of cam levers, each having a first end and a second end and pivotally attached to a support member;
- a pair of cam rollers, each cam roller secured to said first end of said cam levers and configured to be engagable with the respective camming surfaces of each of said die jaw mounting means;
- biasing means in mechanical communication with the second end of each of said cam levers for exerting a biasing force upon said cam lever in a given direction for urging said lever from a first position to a second position;
- and
- a pair of links, each link engagable with one of said cam rollers and movable in a first and second direction generally parallel to said biasing force,
- whereby movement of the links in the first direction causes the biasing means to pivot said cam levers from the first position to the second position urging said cam rollers against said respective cam surfaces of each of said die jaw mounting means and forcing said die jaws to the closed clamping position to securely hold said workpiece during severing thereof, and movement of said links in the second direction causes said links to engage their respective cam rollers causing each of said cam levers to pivot back to the first position, allowing said die jaws to open and said workpiece to pass freely therethrough.
An apparatus for cutting off links of an elongated workpiece of the type including a reciprocating upper die shoe, an opposed lower die shoe, a cutting mechanism to effect the cutting of said workpiece, and means for clamping the workpiece during the cutting thereof, wherein the improvement comprises:
- a pair of opposed die jaws for clamping the workpiece therebetween;
- means for mounting each jaw to said lower die shoe for pivotal movement of said jaws between an open release position and a closed clamping position, said means having an interior die facing surface and an opposed exterior surface, said exterior surface including a camming surface extending along at least a portion thereof;
- means for urging each of said jaws to a closed clamping position, said means including:
- a pair of cam levers, each having a first end and a second end and pivotally attached to a support member;
- a pair of cam rollers, each cam roller rotatably secured to said first end of said cam levers and configured to be engagable with the camming surface of one of said die jaw mounting means;
- biasing means in mechanical communication with the second end of each of said cam levers for biasing said cam lever from a first position to a second position;
- a pair of links secured to said upper die shoe and extending generally vertically between each of said cam rollers and said upper die shoe, each link engagable with one of said cam rollers upon reciprocation of said upper die shoe away from said lower die shoe.
Dependencies are inferred from the claim text.