JPH06297006A - Wide flange shape high in dimensional accuracy and its manufacture and manufacturing device - Google Patents

Abstract

PURPOSE:To make a dimension from the central position of a web to the tip of a flange constant, to improve the assembling accuracy on a user side and to automail the assembly of the device by reducing the thickness of the tip surface of each flange of a wide flange shape manufactured by rolling and specifying the offset accuracy of the web and the width accuracy of the flange. CONSTITUTION:The longitudinal bend of the wide flange shape sawed and cooled after it is rolled is straightened by a roller mill 17 and immediately after the tip part in the longitudinal direction of the wide flange shape leaves the straightener, continuously, the web is held by constraining rollers 7, 7' of a working device 5. At this time, a flange width and the one side width of the flange are measured simultaneously at a detecting end 3 and a prescribed controlling for the width dimension is outputted to each of a working jig holders 6 as setting signals to upper and lower positions through an operation and control system. Then, the tip surfaces of the flange are cut or polished by a working jig. In that case, when the offset accuracy of the web and the width accuracy of the flange of the wide flange shape are controlled to <=+ or -1mm, a severe accuracy demanded by the building industry or the like can be satisfied.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an H-shaped rope having excellent web deviation accuracy and flange width accuracy, and an excellent manufacturing method and manufacturing apparatus thereof. Generally, H-shaped ropes are manufactured by rolling or welding. As is well known, the shape of the H-shaped rope is composed of a web and a flange, but in the case of a welded H-shaped rope, as shown in FIG. Butt the rope plates together and weld 50
It is manufactured by combining a total of three plate materials welded in. On the other hand, as shown in FIG. 3, a rolling H-shaped rope is generally manufactured by alternately rolling a universal rolling machine including upper and lower horizontal rolls and left and right vertical rolls and an edger rolling machine including upper and lower horizontal rolls. Comparing the dimensional accuracy of the products obtained by the two manufacturing methods in which the method is adopted, the welded H-shaped rope is pre-rolled as a plate, or because the machined plate-shaped material is assembled and welded, The dimensional accuracy is good, and the web deviation shown by the accuracy of the flange width and the difference between the flange piece widths A and B shown in FIG. An excellent product can be manufactured. On the other hand, the rolled H-shaped rope is naturally limited in the dimensional accuracy of the product due to the characteristics of the manufacturing means or constraints as described below. FIG. 5 shows a manufacturing process of an H-shaped rope by general universal rolling. The slab material having a rectangular cross section is heated in a heating furnace 11 and then reverse-rolled by a rough rolling machine 12 composed of 2Hi rolls having a plurality of hole dies carved into a dogbone-shaped rough shaped material. Then, reverse rolling is performed by the intermediate rolling mill 13 which is a combination of the universal rolling mill and the edger, and finish rolling is performed by the finish rolling mill 14. After the rolling is finished, it is sawed into a certain length by a sawing machine 15 and cooled by a cooling floor 16. At this time, since the product is bent vertically and horizontally in the length direction, it is corrected by the roller straightening machine 17 to be the final product. Rolling H manufactured by the above manufacturing process
During rolling, the rope is subject to dimensional fluctuations in the longitudinal direction and cross section of the product as a result of many unsteady fluctuations such as temperature, tension, and displacement of the position of the pass line. In particular, when performing reverse rolling, it is important to match the web center position of the material to be rolled with the center of the pass line of the rolling mill (center position of the upper and lower rolls) in order to position the web center at the flange center of the product. However, it is difficult to achieve this completely, and the aforementioned web bias is likely to occur. Many means for eliminating this web bias have been proposed in the past, and efforts have been made to improve dimensional accuracy. For example, Japanese Patent Publication Sho 53-34
587, JP-B-53-34585, and JP-A-63-36914 propose means for aligning the centers of the guides by devising a guide.
There is a limit to the accuracy that can be obtained. Even if various guide systems are used, it is considered as the highest accuracy at the current technical level if the JIS standard satisfies the flange width of ± 3 mm and the web deviation of ± 3 mm. Recent trends in the construction and civil engineering industries are in the trend of labor saving and automation, and it is essential to improve dimensional accuracy for automation. That is, the respective members of the H-shaped rope are assembled and welded or bolted together. However, if there is a flange width variation or web deviation at that time, the assembly work becomes difficult and the assembly accuracy becomes a problem. The closer the error is to 0, that is, the higher the dimensional accuracy is, the easier the automation is and the more the efficiency is improved. However, in the case of the rolling H-shaped rope, it is extremely difficult to reduce the dimensional error to 0 as described above with the current technology. Met. SUMMARY OF THE INVENTION The present invention solves the problems of the conventional rolled H-shaped rope, and acknowledges that the dimensional accuracy of the rolled H-shaped rope is limited. In addition, by mechanically reducing the flange tip surface after rolling, the dimension (flange piece width) from the web center position to the flange tip is made constant, and there is no web deviation and the flange width accuracy is excellent. The purpose is to provide a form rope product at a low price. [0008] The gist of the present invention is to reduce the flange tip end surface of an H-shaped rope manufactured by rolling by a processing device, and to perform the web deviation accuracy and / or the flange width accuracy. Accuracy of one side is ± 1
a high dimensional accuracy H-shaped rope of less than mm, a method for manufacturing a high dimensional accuracy H-shaped rope in which a flange tip surface of the H-shaped rope manufactured by rolling is surface-reduced by a processing device over a part or the entire length in the longitudinal direction thereof, Immediately after the H-shaped rope is straightened by a roller, the method of manufacturing the H-shaped rope with high dimensional accuracy according to the above item, which continuously reduces the flange tip surface, and immediately after the roller for straightening the H-shaped rope, This is an apparatus for manufacturing a high dimensional precision H-shaped rope in which a processing device including a restraining roller that restrains the web from above and below and a working jig that reduces the front surface of the flange is provided in proximity. OPERATION AND EXAMPLES The manufacturing process for carrying out the present invention is basically the same as the conventional rough, intermediate, finish rolling and straightening processes described above with reference to FIG. The features of the manufacturing process of the present invention are as shown in FIG.
A processing device 5 for mechanically surface-reducing the front end surface of the flange is provided immediately after the well-known roller straightening machine 17 in which the 2's are arranged in a zigzag pattern is immediately adjacent to the exit side in the passing direction (A). is there.
In this processing device 5, two sets of left and right restraining rollers 7, 7 ', 8, 8'rotatably provided by a drive source are provided in the H-shaped rope 4.
Is provided so as to grip and constrain the web 41 of the upper and lower sides, and the center line of the pass line of the restraining roller is the same as the central position between the upper and lower rollers of the roller straightener 17 (same horizontal plane).
It is fixed to. The detection end 3 provided on the entrance side of the processing device 5 detects the flange width and the flange piece width of the H-shaped rope exiting the roller straightener 17, and uses an indirect measurement type using a laser or an operating transformer. A well-known dimension / distance measuring detecting end such as a direct contact type can be used. The detected dimension data is compared with a preset width dimension target value via a calculation / control system (not shown), and the deviation value is output to the machining jig holder 6. This processing jig holder 6 is supported in the middle of the two sets of left and right restraining rollers of the main body of the processing apparatus 5 so that the vertical and horizontal positions can be changed, and corresponds to the four flange tip portions of the H rope in the H posture. And four are provided. The processing jig 9 is attached to the processing jig holder 6.
Is installed. Any known cutting tool, milling cutter, or polishing tool can be used as the processing jig 9. In the manufacturing process of the present invention having the above structure, first, the finished flange width of the H-shaped rope in the rolling process is rolled so as to be at least larger than the target width dimension value of the final product. That is, in consideration of the dimensional variation of the product in the longitudinal direction in the rolling process, the machining allowance for carrying out the present invention is left. After rolling, the H-shaped rope which has been sawn and cooled is straightened by the roller straightening machine 17 in the longitudinal direction. However, the end of the H-shaped steel in the longitudinal direction is immediately after leaving the straightening machine. The web is gripped by the restraining rollers 7, 7 ′ of 5. At this time, the flange width and the flange piece width are measured at the detection end 3 at the same time, and a predetermined control amount with respect to the target width dimension value is provided to each of the machining jig holders 6 provided at four positions through the above-described calculation / control system. On the other hand, it is output as a vertical position setting signal. When the front end of the H-shaped rope in the length direction reaches the processing jig holder 6, the processing jig 9 starts cutting or polishing the front end surface of the four flanges. In the present invention, the surface-reducing processing of the flange tip surface is a general term for surface-reducing means such as cutting or polishing. Immediately after the surface-reducing processing by the processing jig 9 is started, when the front end portion in the length direction of the H-shaped rope is further gripped by the constraining rollers 8, 8'in the subsequent stage, the processing jig 9 is constrained by the constraining rollers 7, 7'in the preceding stage. Since it is located at the center of the restraining rollers 8 and 8'in the latter stage, the surface-reduction processing is continued stably. It should be noted that each dimension after processing the flange end surface is measured at a detection end (not shown) to confirm the final product dimension. Further, if the web center positions of the restraining rollers 7, 7'and 8, 8'are secured with sufficient accuracy, the detection end 3 on the entrance side may be omitted. According to the surface-reduction processing method of the present invention, the flange piece width dimension can achieve extremely high accuracy, but considering the strictest accuracy required in the present construction or civil engineering industry and the mechanical accuracy of the means of the present invention. , H-shaped rope web deviation accuracy and flange width accuracy within ± 1 mm is sufficient. Therefore, in the present invention, the practical accuracy range is ± 1 mm or less. The flange tip surface according to the present invention may be processed in any step after cooling and straightening. This has the advantage that it can be performed at the same time and does not lead to improvement of workability and increase of new workers. Further, in the processing according to the present invention, as long as the target accuracy is satisfied, a part of the material in the longitudinal direction may be processed.
It goes without saying that only the range of a certain distance from the end in the longitudinal direction, which is the most important point in using the rope, may be targeted. According to the present invention, since a product having significantly higher dimensional accuracy than that of the conventional as-rolled H-shaped rope can be provided at a low cost,
The assembly accuracy for the user is improved and the automation of assembly is facilitated. Further, since the H-shaped rope used as a processing material is intended for the conventional rolled H-shaped rope which exhibits a marked mass production effect as compared with the welded H-shaped rope, the overall economic effect is extremely large.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic side view showing an example of the device of the present invention. FIG. 2 is a sectional view of a welded H-shaped rope and a diagram showing names of respective parts. FIG. 3 is an explanatory diagram of an H-shaped steel rolling method, in which (a) is a roll arrangement for universal rolling and (b) is a schematic view showing roll arrangement for edger rolling. FIG. 4 is a schematic view showing dimensions of each section of the H-shaped rope. FIG. 5 is a schematic view of a manufacturing process of a rolled H-shaped rope. [Explanation of Codes] 1 ... Welding H-shaped rope 2 ... Straightening roller 3 ... Detection end 4 ... H-shaped rope 5 ... Processing device 6 ... Processing jig holder 7, 8 ... Web restraining roller 9 ... Processing jig 11 ... Heating furnace 12 ... Rough rolling mill 13 ... Intermediate rolling mill 14 ... Finishing rolling mill 15 ... Saw cutting machine 16 ... Cooling floor 17 ... Roller straightening machine

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yosuke Miura             No. 1 Chikko Hachimancho, Sakai City Nippon Steel Stock Association             Inside Sakai Steel Works

Claims (1)

Claim: What is claimed is: 1. A flange tip surface of H-section steel manufactured by rolling is subjected to surface reduction processing by a processing device, and accuracy of web deviation accuracy and / or flange width accuracy is ± 1 mm. A high dimensional accuracy H-section steel characterized by the following. A method for producing a high dimensional precision H-section steel, characterized in that the flange tip end surface of the H-shaped steel manufactured by rolling is subjected to surface reduction processing by a processing device over a part or the entire length in the longitudinal direction thereof. 3. The method for producing a high dimensional precision H-shaped rope according to claim 2, wherein the surface reduction processing of the flange tip surface is continuously performed immediately after the H-shaped rope is straightened by the roller. 4. Immediately after the roller for straightening the H-shaped rope, a processing device equipped with a restraining roller for restraining the web of the H-shaped rope from above and below and a working jig for reducing the front end surface of the flange is provided in proximity. A high-dimensional precision H-shaped rope manufacturing apparatus.