Centered guiding device of bars for straightening machine

Abstract

The invention discloses a centered guiding device of bars for a straightening machine. The centered guiding device comprises two bar limiting units symmetrically arranged on the two sides of a roll gap, wherein each bar limiting unit comprises a guiding plate door, a guiding strip, a guiding plate and two locking cylinders; the lower part of each of the guiding plate doors is rotatably connected with a straightening machine base through a rotating shaft; each of the guiding strips is blocked on the side part of the roll gap and is connected with each of the guiding plate doors through each ofthe guiding plates; the two locking cylinders are respectively positioned on the left side upper part and the right side upper part of each of the guiding plate doors; and cylinder bodies of the locking cylinders are supported on each of the guiding plate doors. According to the centered guiding device of the bars for the straightening machine disclosed by the invention, the guiding plate doors are pressed tightly by the cylinder bodies of the locking cylinders, and because the mass of the cylinder bodies is large, slight vibration is only produced when the guiding plate doors are impacted, sothat sealing of the locking cylinders is difficultly damaged; and therefore, oil leakage failure is reduced, the operation reliability of the centered guiding device is improved, the maintenance costof the equipment is reduced, and a normal operation of production is ensured.

Description

technical field [0001] The invention relates to a bar centering and guiding device used on a bar straightening machine, which belongs to the technical field of metal bar machining. Background technique [0002] The process flow of the bar finishing line is: feeding → straightening → chamfering → shot blasting → surface and internal flaw detection → collection → bundling → weighing and storage. As an important equipment of the whole finishing line, the straightening machine is used in the first finishing process, which plays an important role in ensuring the straightness of the bar, facilitating the processing of the subsequent process, and improving the processing accuracy of the subsequent process. The two-roll straightening machine is a kind of equipment with concave and convex straightening rollers of hyperbolic roll type as the core component, and uses the principle of three-point inversion to straighten the round bar. Its straightening accuracy is high, but the straight...

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Problems solved by technology

[0004] 1. The cylinder body of the locking cylinder is fixed on the overall frame of the straightening machine, and the piston rod is pushed against the guide plate door. Due to the small size and light weight of the piston rod, when the guide plate door is subjected to a large impact during the operation of the straightener , the piston rod is easy to vibrate violently with the guide plate door, resulting in oil leakage from the locking cylinder, which not only increases the maintenance cost of the equipment, but also seriously affects the normal production

[0005] 2. The piston rods of the two locking cylinders press the guide plate door from the left and right sides respectively. The contact surface between the piston rod and the guide plate door is a plane perpendicular to the axis of the piston rod. The friction between the piston rod and the guide plate door is used to prevent the guide plate from The door swings to the outside, and the guide door cannot be effectively locked, especially when producing large-scale bars with large curvature and high yield strength, the vibration and movable range of the guide door will increase greatly, and the straightening accuracy of the bar will drop significantly. unable to meet production requirements

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