CN201950187U

CN201950187U - Dummy bar

Info

Publication number: CN201950187U
Application number: CN201120088505XU
Authority: CN
Inventors: 董志强; 刘权; 王国华; 张建忠; 李艳芹
Original assignee: Beris Engineering and Research Corp
Current assignee: Beris Engineering and Research Corp
Priority date: 2011-03-28
Filing date: 2011-03-28
Publication date: 2011-08-31
Anticipated expiration: 2021-03-28

Abstract

The utility model provides a dummy bar used for the round billet production of the continuous casting technology in the metallurgical industry. The dummy bar mainly comprises a dummy bar head (101), a transition section combination and a bar body and is characterized in that the transition section combination consists of a square-round transition section (102), a first transition section (103) and a second transition section (104), the transition sections are detachably connected and are respectively detachably connected with the bar head and the bar body, a first joint (1021) which is connected with the bar head is arranged at the front end of the square-round transition section (102), a second joint (1022) which is combined with the first transition section is arranged at the back end of the square-round transition section (102), and an upper inclined surface (1) and a lower inclined surface (2) with a certain inclination are respectively processed at the upper part and the lower part of the square-round transition section (102) contacted with an upper roller and a lower roller. With the adoption of the dummy bar provided by the technical scheme, smooth transition from a square to a circle between the bar head and the bar body is realized.

Description

A kind of dummy bar

Technical field

The utility model relates to a kind of dummy bar, relates in particular to the dummy bar of the production circle base that is used for continuous casting process in a kind of metallurgical industry.

Background technology

Continuous casting is modern metallurgy industry, the iron and steel main technique mode of producing particularly, and conticaster is a task equipment of realizing continuous casting process.The round billet continuous casting machine is to be improved by billet caster, the maximum difference of itself and billet caster is the arc groove face that the roll surface of round billet continuous casting machine straightening machine must process a suitable width (w), to improve parcel, reduce the distortion of depressing in the strand straightening process to strand; Because the dummy bar head is a cylinder, dummy bar is as square (rectangle) simultaneously, and the changeover portion that therefore connects dummy ingot shaft and dummy bar head must be realized the smooth and easy transition to circle by the side.

Must send dummy bar (the transmission niproll by one or many straightening machine clamps dummy bar and upwards transmission, along guide roller the dummy bar head is sent in the crystallizer copper pipe) before the continuous casting production earlier.Be rigid transition between the square dummy bar shaft of circle base dummy bar and the cylinder dummy bar head at present, directly by Fang Bianyuan, cause certain height poor at seam crossing inevitably owing to mismachining tolerance, therefore in sending dummy bar or process of billet withdrawal, when straightening machine roller is crossed this seam, skid easily, and then roller is stuck in this seam crossing.

Therefore how to design a kind of dummy bar, its shaft and bar head can be realized the smooth and easy transition to circle by the side, will be the technical problems that those skilled in the art need to be resolved hurrily.

Summary of the invention

The purpose of this utility model is to provide a kind of circumference seamless transitions circle base dummy bar, is provided with transition segment between the head of dummy bar and shaft, makes from more smooth and easy to the transition of circle by the side between shaft and the bar head.

To achieve these goals, round base dummy bar described in the utility model comprises a kind of new transition segment combining structure.Concrete technical scheme is as follows: a kind of circumference seamless transitions circle base dummy bar mainly includes dummy head, transition segment combination and shaft; The combination of wherein said transition segment is made up of circumference transition segment, first transition segment, second transition segment, and between each transition segment and be detachable the connection between transition segment and bar head and the shaft; The front end of described circumference transition segment is provided with first joint that is connected with the bar head, and the rear end is provided with second joint that combines with first transition segment.

Further, the upper and lower that the circumference transition segment contacts with up-down rollers is processed with ramp and the lower inclined plane that has certain inclination angle respectively, forms a pair of with the inclined-plane (as shown in the figure) of central horizontal in the face of claiming;

Further, described ramp and lower inclined plane begin to extend to the second joint afterbody of this circumference transition segment from the circumference transition segment excircle always apart from front end face certain distance (d), and from the front end to the rear end spool centroclinal to the circumference transition segment gradually.

Further, the pass between the width (w) of arc groove is on the roll surface of the width (b) of the width (a) of first joint of this circumference transition segment, second joint and straightening machine: a＜w＜b.By control a＜w, be that complete arc surface contacts between the arc groove face that has promptly guaranteed near the up-down rollers pin joint and dummy head and the circumference transition segment, smoothly cross seam, jam does not take place at the artis place, realize smooth and easy transition; By controlling w＜b, guaranteed that near the flat face of the up-down rollers of pin joint can contact with realization part plan between circumference transition segment and the transition segment, cross seam and realize smooth and easy excessive.

Further, first transition segment, second transition segment and straightening machine up and down contacting between the roll surface be plane contact.

In sum, the circumference transition segment is in order to realize the circumference transition of dummy bar, it must meet certain requirement on design feature, specific as follows, the first joint area top and bottom of circumference transition segment keep and the identical face of cylinder of bar head diameter, and width a is less than the width w of up-down rollers groove, the surface of the joint of the circumference transition segment and first transition segment is for having the elongated surfaces on the inclined-plane at certain inclination angle on the circumference transition segment, its width b is greater than the width w of roll surface upper groove, this structure guaranteed up-down rollers with the contact process of dummy bar in, from the dummy head to the shaft, can realize transition gradually smoothly from circle to the side, just in the process of transition, at first when up-down rollers contacts with circumference transition knot, contact between it is the circular arc contact, along with going deep into of contact, the groove of up-down rollers has run into last plane and the lower plane on the circumference transition segment respectively, because above-mentioned last plane and lower plane all is the inclined-plane that width is widened gradually, this just means that the up-down rollers groove develops into the disengaging plane of groove and contacting of plane gradually with the increase that the circular arc of circumference transition segment contacts along with plane width, and b＞w＞a has guaranteed the realization of this process.

Adopted the described round base dummy bar of technique scheme, because the special construction of transition segment assembly, realized when up-down rollers contacts with transition segment from circle making from more smooth and easy to the transition of circle between shaft and the bar head to the side or bumpless transfer by the side from the side to circle.

Description of drawings

Fig. 1 is the head bar perspective view of round base dummy bar one specific embodiment described in the utility model;

Fig. 2 is contact schematic diagram that circular arc contact with straightening machine up-down rollers in the incipient stage for the circumference transition segment of round base dummy bar one specific embodiment described in the utility model;

Fig. 3 changes the schematic diagram that contacts under the plane contact situation into for circumference transition segment and a straightening machine up-down rollers of round base dummy bar one specific embodiment described in the utility model;

Fig. 4 is dummy head described in the utility model and the assembling schematic diagram that has an area of transition segment.

The specific embodiment

In order better to understand round base dummy bar described in the utility model, do a detailed description below in conjunction with accompanying drawing one specific embodiment, specifically describe as follows:

Fig. 1 is the head bar perspective view of this specific embodiment, and as seen from the figure, this seamless transitions circle base dummy bar mainly includes dummy head 101, transition segment combination and shaft (not shown); Wherein transition segment combination is made up of circumference transition segment 102, first transition segment 103, second transition segment 104, and between each transition segment and all be to be connected by bearing pin between transition segment and bar head and the shaft; The front end of described circumference transition segment 102 is provided with first joint 1021 that is connected with the bar head, and the rear end is provided with second joint 1022 that combines with first transition segment 103.By Fig. 1 also as can be seen, circumference transition segment 102 is processed with the inclined-plane that has certain inclination angle respectively with the upper and lower that straightening machine up-down rollers contacts, and forms a pair of with the inclined-plane of central horizontal in the face of claiming, called after ramp 1 and lower inclined plane 2 respectively.

Fig. 4 is this embodiment dummy head and the assembling schematic diagram that has an area of transition segment, can be clearly seen that by Fig. 1 and Fig. 4, ramp 1 and lower inclined plane 2 all are just to begin to occur behind first joint, the 1021 certain distance d that leave circumference transition segment front end, and extend to second joint 1022 of this circumference transition segment always, from the front end to the rear end gradually to centroclinal, increasing with the width that guarantees the plane, and then make two inclined-planes with the contact process of up-down rollers in contact from initial circular arc, change last plane contact gradually into, as shown in Figures 2 and 3, be respectively circumference transition segment and straightening machine up-down rollers (top roll 3, lower roll 4) is the schematic diagram that contacts that changes in contact schematic diagram and later stage of circular arc contact under the plane contact situation in the incipient stage, can clearly finds out by figure, in the incipient stage, it when rigidly connecting first joint 1021 that contacts the circumference transition segment complete cambered surface contact, and a＜w, the later stage is when touching second joint of circumference transition segment, be part plan contact, b＞w.

From the above mentioned as can be known, the pass between the width w of arc groove is a＜w＜b on the roll surface of the width b of the width a of first joint of this circumference transition segment 102, second joint and straightening machine.The benefit of this relation is, by control a＜w, promptly guaranteed to contact for complete arc surface between near the arc groove face and 101 and 102 of the up-down rollers pin joint, smoothly crosses seam, and jam does not take place at the artis place, realizes smooth and easy transition; By control w＜b, guaranteed that near the flat face of the up-down rollers of pin joint can contact with realization part plan between circumference transition segment 102 and the transition segment 103, cross seam and realize smooth and easy transition.

Because the upper and lower surface of first transition segment 103, second transition segment 104 is the plane, thus its with the straightening machine about contacting between the roll surface be plane contact.

In sum, the plane contact that b＞w＞a has guaranteed straightening machine up-down rollers groove and circumference transition segment breaks away from the plane of groove and contacting of plane along with the increase of plane width develops into gradually, has finally realized the smooth and easy transition from the dummy head to the shaft.

Certainly, the above only is a preferred implementation of the present utility model, should be understood that; for the person of ordinary skill of the art; under the prerequisite that does not break away from this principle, can also make some modification and improvement, these also should be considered as belonging to protection domain of the present utility model.

Claims

1. one kind is had an area of seamless transitions circle base dummy bar, mainly include dummy head (101), transition segment combination and shaft, it is characterized in that, the combination of described transition segment is made up of circumference transition segment (102), first transition segment (103), second transition segment (104), and between each transition segment and be detachable the connection between transition segment and bar head and the shaft; The front end of described circumference transition segment (102) is provided with first joint (1021) that is connected with the bar head, and the rear end is provided with second joint (1022) that combines with first transition segment.

2. circumference seamless transitions circle base dummy bar as claimed in claim 1 is characterized in that the upper and lower that described circumference transition segment (102) contacts with up-down rollers is processed with ramp (1) and the lower inclined plane (2) that has certain inclination angle respectively.

3. circumference seamless transitions circle base dummy bar as claimed in claim 2, it is characterized in that, ramp of described circumference transition segment (1) and lower inclined plane (2) begin to extend to second joint (1022) afterbody of this circumference transition segment from circumference transition segment (102) excircle always apart from front end face certain distance (d), and from the front end to the rear end spool centroclinal to the circumference transition segment gradually.

4. circumference seamless transitions circle base dummy bar as claimed in claim 1, it is characterized in that the pass on the roll surface of the width (a) of first joint of described circumference transition segment (102), the width (b) of second joint and straightening machine between the width (w) of arc groove is the width (b) of width (w)＜second joint of width (a)＜groove of first joint.

5. circumference seamless transitions as claimed in claim 1 circle base dummy bar is characterized in that, the bearing pin connection is adopted in being connected between the described transition segment and between transition segment and bar head (101) and the shaft.

6. circumference seamless transitions as claimed in claim 1 circle base dummy bar is characterized in that the upper and lower surface of described first transition segment (103), described second transition segment (104) is the plane, its with the straightening machine about contacting between the roll surface be plane contact.