CN101602119A

CN101602119A - The precise conducting roller structure of billet hot punching machine

Info

Publication number: CN101602119A
Application number: CNA2009101440811A
Authority: CN
Inventors: 殷伟勤; 张春雨
Original assignee: Jiangsu Changbao Precision Steel Tube Co Ltd
Current assignee: Jiangsu Changbao Precision Steel Tube Co Ltd
Priority date: 2009-07-08
Filing date: 2009-07-08
Publication date: 2009-12-16

Abstract

The precise conducting roller structure of billet hot punching machine, comprise left holder, mandrel, left end cap, ball ball bearing entad, the biserial radial roller bearing, the conduction roller, right end cap, right holder, the mandrel two ends are fixedly mounted on respectively on left holder and the right holder, the left end of conduction roller is by entad ball ball bearing and biserial radial roller bearing are installed on the mandrel, since adopted between conduction roller and the mandrel two groups be symmetrically distributed by entad ball ball bearing and biserial radial roller bearing are formed support pattern, the conduction roller is under the duty of temperature alternating lifting, owing to producing the end play variation, the reason of expanding with heat and contract with cold can not cause bearing stuck between conduction roller and the mandrel, the rotating accuracy of bearing is reduced, thereby the rotating accuracy and the axial precision of conduction roller have been guaranteed, satisfied the accurate requirement of billet hot punching machine, made the existing billet hot punching machine can the machining high-precision steel pipe.

Description

The precise conducting roller structure of billet hot punching machine

Technical field:

The present invention relates to employed billet hot punching machine in the seamless steel tube production process, relate in particular to and embrace the core roller in the machine in this equipment.

Background technology:

In high-precision seamless steel tube production process, must there be high-precision equipment to guarantee, wherein billet hot punching machine is one of crucial process equipment, in billet hot punching machine, the precision of conduction roller directly has influence on the machining accuracy of seamless steel pipe, not only higher rotating accuracy will be arranged for high-precision conduction roller, and higher anti-axial motion precision will be arranged, could guarantee the uniformity of steel pipe circumference wall thickness like this, guarantee that the thickness of steel pipe error satisfies national thickness of steel pipe error requirements.These required precisions depend primarily on the two supports structure of conduction roller, the conduction roller two supports structure of existing billet hot punching machine all adopts two conical surface roller bearings of installing face-to-face, its existing higher radially bearing capacity can be adjusted end play again, under the routine work condition, the main axle structure of the conical surface cylinder roller bearing supporting of this two symmetrical distributions is a kind of typical spindle support structures.Yet billet hot punching machine in actual use, the stuck phenomenon of not changeing often appears in the conduction roller, cause boring a hole and produce dry friction between push rod and the conduction roller, the final conduction roller that makes grinds corresponding arc groove with push rod, so just make the perforation push rod depart from the steel pipe center, cause steel pipe circumferential wall thickness ununiformity, can't be up to standard, in order to solve the stuck problem of not changeing of conduction roller, people can only solve by the end play of amplification bearing and the mode of radial clearance, though this solution has solved the stuck problem of conduction roller, the rotating accuracy of conduction roller reduces significantly, therefore relies on existing billet hot punching machine to be difficult to stably process high-precision steel pipe.

Through conscientiously researching and analysing, the main cause that causes above-mentioned defective is the working environment of conducting roller structure incompatibility billet hot punching machine, billet hot punching machine is in real work, the conduction roller is in temperature rapid take-off and landing state, in the perforated steel billit process of high-alloy steel, must replace cooling control with cooling water according to technological requirement, when hot steel billet is sent into the conduction roller when being in the perforation state, the cooling of can not spraying water, work as punch off, steel pipe must cool off by water spray after leaving the conduction roller fast, for existing bipyramid face cylinder roller bearing supporting structure, will inevitably cause conducting the defective that roller is stuck or running clearance is excessive, when being transported to conduction, hot steel billet is on the roller when waiting to bore a hole state, the conduction roller is in the condition of high temperature, and the temperature of mandrel is much lower relatively, and this will make the axial and radial clearance that originally mixes up increase suddenly, though live-roller can rotate, but rotating accuracy is very low; On the contrary after hot perforated steel billit finishes, must cool off fast the conduction roller with cooling water by technological requirement, this just makes and conducts the roller fast cooling, and the temperature of mandrel is higher relatively, end play between two bearings is eliminated suddenly at this moment, even can produce axial interference, cause conducting that roller is stuck does not change.

Summary of the invention:

In order to overcome the above-mentioned defective that exists in the existing billet hot punching machine production process, improve the rotating accuracy of conduction roller under the alternating temperature-changing duty and axial precision, the purpose of this invention is to provide a kind of precise conducting roller structure of billet hot punching machine.

The technical scheme that the present invention takes is as follows:

The precise conducting roller structure of described billet hot punching machine, as shown in Figure 2, it comprises left holder 1, mandrel 2, left end cap 3, entad the ball ball bearing 4, biserial radial roller bearing 5, conduction roller 6, right end cap 7, right holder 8, mandrel 2 two ends are fixedly mounted on respectively on left holder 1 and the right holder 8, the left end of conduction roller 6 is by entad ball ball bearing 4 and biserial radial roller bearing 5 are installed on the mandrel 2, and entad ball ball bearing 4 is positioned at the outside of biserial radial roller bearing 5, the outer ring of the bearing group of left end is axially limited by left end cap 3, and inner ring is axially limited by left axle sleeve 9 by left holder 1; The outer ring of the bearing group of right-hand member is axially limited by right end cap 7, and inner ring is axially limited by right axle sleeve 10 by right holder 8.

Since adopted between conduction roller 6 and the mandrel 2 two groups of symmetrical distributions by entad ball ball bearing 4 and biserial radial roller bearing 5 are formed support pattern, conduction roller 6 is under the duty of temperature alternating lifting, owing to producing the end play variation, the reason of expanding with heat and contract with cold can not cause bearing stuck between conduction roller 6 and the mandrel 2, the rotating accuracy of bearing is reduced, thereby the rotating accuracy and the axial precision of conduction roller 6 have been guaranteed, satisfied the accurate requirement of billet hot punching machine, make the existing billet hot punching machine can the machining high-precision steel pipe, entad adopting, ball ball bearing 4 and biserial radial roller bearing 5 are installed on the mandrel 2, be the combined bearing structural design, entad select that ball ball bearing 4 is main to improve shock resistance when embracing the perforation push rod for use, improve bearing service life simultaneously.

Description of drawings:

Fig. 1 is the structural representation of the conduction roller of existing billet hot punching machine;

Fig. 2 is a structural representation of the present invention;

Among the figure: the holder of a 1-left side; The 2-mandrel; The 3-left end cap; 4-is the ball ball bearing entad; 5-biserial radial roller bearing; 6-conducts roller; The 7-right end cap; The right holder of 8-; The 9-left axle sleeve; The 10-right axle sleeve.

The specific embodiment:

Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated:

Embodiment 1: the precise conducting roller structure of described billet hot punching machine, as shown in Figure 2, it comprises left holder 1, mandrel 2, left end cap 3, entad the ball ball bearing 4, biserial radial roller bearing 5, conduction roller 6, right end cap 7, right holder 8, mandrel 2 two ends are fixedly mounted on respectively on left holder 1 and the right holder 8, the left end of conduction roller 6 is installed on the mandrel 2 by two groups of entad ball ball bearing 4 and biserial radial roller bearings 5 that are symmetrically distributed, and entad ball ball bearing 4 is positioned at the outside of biserial radial roller bearing 5, the outer ring of the bearing group of left end is axially limited by left end cap 3, and inner ring is axially limited by left axle sleeve 9 by left holder 1; The outer ring of the bearing group of right-hand member is axially limited by right end cap 7, and inner ring is axially limited by right axle sleeve 10 by right holder 8.

Claims

1, the precise conducting roller structure of billet hot punching machine is characterized in that; It comprises left holder (1), mandrel (2), left end cap (3), ball ball bearing (4) entad, biserial radial roller bearing (5), conduction roller (6), right end cap (7), right holder (8), mandrel (2) two ends are fixedly mounted on respectively on left holder (1) and the right holder (8), the left end of conduction roller (6) is by entad ball ball bearing (4) and biserial radial roller bearing (5) are installed on the mandrel (2), and entad ball ball bearing (4) is positioned at the outside of biserial radial roller bearing (5), the outer ring of the bearing group of left end is axially limited by left end cap (3), and inner ring is axially limited by left axle sleeve (9) by left holder (1); The outer ring of the bearing group of right-hand member is axially limited by right end cap (7), and inner ring is axially limited by right axle sleeve (10) by right holder (8).