Plate and tube bending device

Abstract

A plate and tube bending device in which a workpiece is held between the forming die and the secondary clamp block of a plate and tube bending fixture. When the primary clamp block of the plate bending fixture is rotated to achieve a bending moment in the workpiece, the workpiece is bent until the primary clamp block revolves to a top point where rotation ceases and the workpiece is formed exactly into the expected angle of bend. At the same time, the primary clamp block cushioning mount has shock absorbing springs inside and the pressure cylinder mount absorbs shock from the force generated when force is applied to the workpiece during bending which is uniformly dispersed by the primary clamp block such that the workpiece is formed precisely at the expected angle of bend, with the workpiece surface remaining smooth and free of pressure marks.

Description

BACKGROUND OF THE INVENTION [0001] 1) Field of the Invention [0002] The invention herein relates to forming jigs and fixtures, specifically a plate and tube bending device capable of absorbing shock from the force generated while a workpiece is being bent to uniformly disperse force exerted on the workpiece, completely preventing situations occurring due to concentrations of applied force such that the workpiece is formed with precision at a predetermined angle of bend, with the workpiece surface remaining smooth and free of pressure marks. [0003] 2) Description of the Prior Art [0004] There are three types of bending methods utilized by existent plate and tube bending devices: [0005] One, as indicated in FIG. 1-A, is stretch bending in which the chucks A1 of the plate and tube bending device A hold the two extremities of a workpiece B, with a form block A2 disposed on the plate and tube bending device A serving as the axial center around which the chucks A1 flex the workpiece B to ...

AI Technical Summary

Benefits of technology

[0013] The primary objective of the invention herein is to provide a plate and tube bending device in which a workpiece is held between the forming die and the secondary clamp block of a plate and tube bending fixture, with a primary clamp block also maintaining position such that the workpiece is held very firmly in the plate and tube bending fixture for facilitating the next bending fabrication task; when the primary clamp block of the plate bending fixture is rotated to achieve a bending moment in the workpiece, the workpiece is bent until the primary clamp block revolves to a top point where rotation ceases and the workpiece is formed exactly into the expected angle of bend; at the same time, the primary clamp block cushioning mount has shock absorbing springs inside and the pressure cylinder mount absorbs shock from the force generated when force is applied to the workpiece during bending which is uniformly dispersed by the primary clamp block such that the workpiece is formed precisely at the expected angle of bend, with the workpiece surface remaining smooth and free of pressure marks.

[0014] Another objective of the invention herein is to provide a plate and tube bending device in which after a workpiece held between the forming die and the secondary clamp block of a plate and tube bending fixture, the pressure cylinder piston rod of the primary clamp block extends out synchronously such that the piston rod end head linked by means of an inserted pin between the connecting rod assembly and the connecting rod assembly said paired connecting rod element assemblies as well as the connecting rod guide element mount ensconced between the bottom ends of each said paired connecting rod element assemblies move synchronously, impelling the said connecting rod guide element mount fitted in the two inner side surfaces of the guide slots along the lower half portion of the clamp block mount containing room into a guided slide, causing the piston rod to very smoothly and stably extend and retract, the piston rod continuing to extend causing the end head linked by means of the inserted pin between the connecting rod assembly to synchronously move until the guide track formed along the two sides at the bottom surface of the guide track mount in coordination with the guide track slot mount having the inset guide slot along the connecting rod mount upper end mount surface of the connecting rod assembly enables the cushioning mount to fully clamp the workpiece, thereby completing the clamped positioning of the workpiece and facilitating the next bending fabrication task of the workpiece.

Problems solved by technology

However, when the said three types of bending methods are utilized by the plate and tube bending devices A to shape the workpiece B to a predetermined angle of bend, since force is generated when the workpiece B being bent between the chucks A1, the pressure bar A3, the clamp A4 of the plate and tube bending devices A and the chucks A1, the pressure bar A3, the clamp A4 are incapable of uniformly dispersing and absorbing the shock of such applied forces, this often results in the impossibility of forming the workpiece B to a predetermined angle of bend and, furthermore misshaping and surface wear problems occur that affect the workpiece 5 finished product quality and there are also fitting problems when assembled with other components.

However, when the applied force accompanying the clamp A4 dislocation becomes capable of flexing the workpiece B at the bending moment, i.e., when the bending of the workpiece B is due completely to the action of the clamp A4, the clamp A4 lacks any shock absorption structure to uniformly disperse force applied to the workpiece B, resulting in concentrations of force as the workpiece B is bent, causing the misshaping of the workpiece B after bending (especially at the bend of the workpiece B); with no accurate control over the degree of precision, the quality of the workpiece B finished product is adversely affected and fitting problems occur when assembled with other components.

In addition, when the action of the clamp A4 produces dislocation, the clamp A4 moves against the surface of the workpiece B, easily causing wear and abrasion of the workpiece B surface that affects the appearance of the workpiece B.

Images