Shear assembly for use with a punch press for cutting L sectioned steel strips
AssigneeKabushiki Kaisha Ogura
InventorKiyoshi Kimura
Life of this patent
Estimating the term…
Abstract
A shear assembly to be replaceably installed in a portable, hydraulic punch press for cutting L sectioned steel strips at, typically, 45 degrees preparatory to combining them into rectangular frames at sites of construction. The shear assembly comprises a fixed shear in the shape of a female V with an apex angle of 90 degrees, and a movable shear in the shape of a male V movable up and down past the fixed shear. Formed in fixed relation to the fixed shear is a work rest having a pair of contact surfaces with a ridge therebetween in alignment with the apex of the fixed shear. The contact surfaces of the work rest are so positioned and angled that the opposite ends of an L sectioned steel strip can be cut off into angles of symmetrical shape. An alternate embodiment is disclosed.
Claims17
A shear assembly for use with a punch press for cutting work at a desired angle, the shear assembly comprising:
- (a) a support;
- (b) a first shear having a female V shape, with an apex angle of 90 degrees, mounted to the support;
- (c) a second shear having a male V shape mounted to the support;
- (d) either of the first and the second shears being arranged to move in linear reciprocation relative to the other and to the support in a predetermined direction and in a predetermined plane for cutting work by shearing action between the two shears;
- and
- (e) a work rest formed on the support and having a pair of contact surfaces with a ridge therebetween in alignment with the apex of the first shear, each contact surface of the work rest being disposed at a desired angle with respect to the predetermined plane and as seen in the predetermined direction, and at an angle of 45 degrees with respect to the predetermined plane, wherein when the work rests on the contact surfaces and the first and second shears move in linear reciprocation to each other, the contact surfaces cause the work to be sheared at only the desired angle.
A shear assembly for use with a punch press for cutting work at a desired angle, the shear assembly comprising:
- (a) a support;
- (b) a first shear having a female V shape, with an apex angle of 90 degrees, mounted to the support;
- (c) a second shear having a male V shape mounted to the support;
- (d) either of the first and the second shears arranged to move in linear reciprocation relative to the other and to the support in a predetermined direction and in a predetermined plane for cutting work by shearing action between the two shears;
- and
- (e) a work rest formed on the support and having a pair of contact surfaces with a ridge therebetween in alignment with the apex of the first shear, each contact surface of the work rest being disposed at a desired angle with respect to the predetermined plane and as seen in the predetermined direction, and at an angle of 45 degrees with respect to the predetermined plane, wherein when the work rests on the contact surfaces and the first and second shears move in linear reciprocation to each other, the contact surfaces cause the work to be sheared at only the desired angle;
- (f) further comprising a spring acting between the second shear and the support in order to hold the second shear away from the first shear.
A shear assembly for use with a punch press for cutting work at a desired angle, the shear assembly comprising:
- (a) a support;
- (b) a first shear having a female V shape, with an apex angle of 90 degrees, mounted to the support;
- (c) a second shear having a male V shape mounted to the support;
- (d) either of the first and the second shears being arranged to move in linear reciprocation relative to the other and to the support in a predetermined direction and in a predetermined plane for cutting work by shearing action between the two shears;
- and
- (e) a work rest formed on the support and having a pair of contact surfaces with a ridge therebetween in alignment with the apex of the first shear, each contact surface of the work rest being disposed at an obtuse or acute angle with respect to the predetermined plane.
Dependencies are inferred from the claim text.