Guide crossbeam device for short stress bar rolling mill

Abstract

The invention discloses a guide crossbeam device for a short stress bar rolling mill. The guide crossbeam device comprises a guide crossbeam body, a guide seat and a downwards-pressing plate, wherein the guide seat is positioned above the guide crossbeam body; the downwards-pressing plate is fixed on the left lower part of the guide seat; left and right inclined planes on the lower part of the guide seat are matched with left and right inclined planes on the upper part of the guide crossbeam body respectively; an upper inclined plane polytetrafluoroethylene base plate fixed between the inclined planes is in fit with upper and lower inclined planes respectively; a worm bearing pedestal is fixed on the right lower part of the guide seat; a matching plane of the downwards-pressing plate and the upper part of the guide crossbeam body, and a matching plane of the worm bearing pedestal and the upper part of the guide crossbeam body are horizontal planes; the horizontal planes of the guide crossbeam body are positioned below the inclined planes; and a lower plane polytetrafluoroethylene base plate fixed between the horizontal planes is in fit with the upper and lower horizontal planes respectively. The guide crossbeam device has the characteristics of accurate location, high pollution-resistant and self-lubricating properties of sliding planes and driving pairs, and easy movement of the guide seat, self-locking reliability, low labor intensity and short operating time during groove changing, and long maintenance period. The guide crossbeam device can be widely applied in the field of steel rolling.

Description

technical field [0001] The invention relates to a bar short-stress rolling mill, in particular to a guide beam device for the rolling mill. Background technique [0002] figure 1 and figure 2 It is a bar short-stress rolling mill commonly used in the prior art, including a rolling mill body 1, an upper roll 2 and a lower roll 3 arranged up and down in the rolling mill body 1, and racks 5 are arranged on both sides of the rolling mill body 1 along the rolling direction. Guard beam 4 device is arranged on frame 5 below. [0003] The main function of the guide crossbeam device 4 is to move the guide along the direction of roll rotation to align the roll groove when the guide is positioned and the groove is changed. image 3 It is a structural schematic diagram of the guide beam device 4 in the prior art. In the guide beam device 4 , the guide seat 42 is located above the guide beam body 41 , two horizontally placed plane copper backing plates 43 are installed between the g...

AI Technical Summary

Problems solved by technology

Therefore, the working surfaces where the copper backing plate, the guide beam body 41 and the four copper backing plates are in contact are easy to wear

[0007] 2. Poor positioning reliability of guide seat 42

This structure is after the plane copper backing plate 43, the fixed copper backing plate 45 on the lower slope, the movable copper backing plate 44 on the lower slope or the working surface where the guide crossbeam body 41 is in contact with the 4 copper backing plates is worn, the guide seat 42 is relatively stable to the guide and guard. The positioning accuracy of the guard beam body 41 is greatly reduced

[0009] 3. The transmission pair of copper nut 471 and screw rod 472 is easy to get stuck

[0010] Because there is a lot of dust in this part, the screw pitch of screw 472 is only 3mm, which is too small, and the working condition of this part is high humidity and high ambient temperature, screw 472 is easy to rust, and the transmission of copper nut 471 and screw 472 is easy to be contaminated by dirt. Stuck

[0011] 4. Low slot change efficiency and high labor intensity

[0012] Due to the small screw pitch (3mm) of the screw mandrel 472, the guide seat 42 moves a short distance along the rolling direction of the roll when the screw mandrel 472 rotates one circle, and the work efficiency of slot changing is low.

Because the transmission pair of copper nut 471 and screw mandrel 472 is easily stuck by dirt, the labor intensity of rotating the screw mandrel 472 is large when changing slots. up to 30 minutes

[0013] 5. High maintenance cost

[0014] After each cycle of use (25 days), the lead screw 472 has a small pitch (3mm), and cleaning is difficult. It takes 8 hours to clean, lubricate, adjust and maintain, and the amount of maintenance is large.

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