KR20190135125A - Manufacturing Method for Ring Flange using Flat Steel Strip - Google Patents

Abstract

The present invention relates to a ring flange manufacturing method using a flat iron material, which can improve productivity and significantly reduce manufacturing costs by bending and welding a flat iron material having a certain thickness, width and length to form a ring flange. The method comprises: a material preparation step (S10) of preparing the flat iron material (11) having a predetermined thickness, width and length; a ring forming step (S20) of inserting the flat iron material (11) into a bending machine in the horizontal direction such that a circular ring (12) or a semi-circular ring (12′) bent and cut to have the predetermined inner diameter and outer diameter is formed; a welding step (S30) of inclinedly cutting an end cross section of one side of the cut circular ring (12) or an end cross section of the semi-circular ring (12′) to form a bevel angle, and welding the cross section with the formed bevel angle in close contact with the other cross section to form a circular ring (13) having the predetermined inner and outer diameters; a hydraulic correction step (S40) of correcting the flatness by pressing the circular ring (13), in which the welding is completed, by a hydraulic press; a primary turning step (S50) of turning the outer diameter portion and one side of the circular ring (13) while fixing the inside of the circular ring (13); a secondary turning step (S60) of turning the inner diameter portion and the other side of the circular ring (13) while fixing the outside of the circular ring (13); and a groove cutting step (S70) of forming a ring flange by cutting and forming a groove (14) having a predetermined size in the inner diameter portion of the circular ring (13).

Description

Manufacturing Method for Ring Flange using Flat Steel Strip

The present invention relates to a ring flange manufacturing method using a thick flat iron material having a thickness of 12 mm or more, and more particularly, to be able to form a ring flange by bending and welding a flat iron material having a predetermined thickness, width and length. The present invention relates to a ring flange manufacturing method using a flat iron material that can significantly reduce manufacturing costs.

In general, commercial vehicles such as buses and trucks are heavy, unlike passenger cars, so the power transmission structure is a heavy-duty pole, and most of them are rear-wheel drive type.

A carrier gear bundle connected to a transmission is assembled to the rear axle housing for the rear wheel driving of the commercial vehicle, and a cover of the carrier gear bundle is bolted to a ring flange provided in the axle housing.

This ring flange is integrally attached to the cross section of the axle housing, as shown in Fig. 1, and has a ring shape having a thick thickness of 12 mm or more.

In a conventional ring flange manufacturing method, an iron plate having a constant thickness and width is prepared, cut into a ring flange shape, and produced. An oxygen cut or a laser cut is used for cutting the iron plate.

However, this method cuts out the annular flange from the square iron plate, so there are many pieces of insoluble iron plate that cannot be used no matter how well cut. Therefore, the material cost of the ring flange is increased, and the manufacturing cost is increased.

On the other hand, as a result of examining the prior art related to the present invention, a plurality of patent documents were searched, and some of them are introduced as follows.

Patent document 1, in order to manufacture an annular flange used in the production of high-strength pile concrete, the cross-section is a ladder-shaped flat iron to the walking means fixed to one side of the rotating roller, so that the flat iron is smoothly supplied by the guide means After rotating the rotary rollers, the flat iron is wound along the outer circumference of the rotary roller, while the conveying means is gradually moved horizontally so that the flat iron is wound in the form of a spring without being wound around one of the rotary rollers. By cutting the bell into several pieces by cutting it into bells, welding the cut parts to obtain a complete annular flange, cutting the welded part to make a flange of the same thickness, and putting the annular flange into the bowling machine. Flat iron to be manufactured by flange It discloses a manufacturing method and a bending apparatus yonghan flange.

Patent document 2 is a step of cutting or polishing the surface of the flat iron; Bending the flat iron such that a thinner side becomes an inner diameter and abutting cross-sections substantially perpendicular to the longitudinal direction of the flat iron; Welding joints between the butted sections; flanges, which can be used directly on flat flanges or by pre-smoothly processing the face of flat iron used in end pipes, thereby manufacturing the flanges to increase the airtightness of the flanges. Disclosed is a manufacturing method and a flanged flat surface processing apparatus.

Patent document 3 is a base arrange | positioned inside a flange; A first arm having one side rotatably connected to the pedestal and the other side having a flange processing portion and a rail contact portion for processing the flange; And a rail part for contacting the rail contact part to support the flange processing part of the first arm and the other side provided with the rail contact part, and by using a rail to disperse the weight of the arm to improve durability of the apparatus and to process The flange processing apparatus which improved the precision is disclosed.

KR 10-1996-0016988 A KR 10-2009-0109399 A KR 10-1303932 B1

The present invention has been made in order to solve the above problems of the prior art, a ring by welding a circular bending of a flat iron material having a certain thickness, width and length after welding without cutting the iron plate by oxygen cutting or laser cutting It is an object of the present invention to provide a ring flange manufacturing method using a flat iron material, which improves productivity by improving the productivity and greatly reducing manufacturing costs by manufacturing the flange and machining the surface through turning after flatness correction.

In addition, an object of the present invention is to provide a ring flange manufacturing method using a flat iron material to increase the material utilization by allowing the ring flange to be manufactured as a standard flat iron material as well as pieces of flat iron material.

The present invention for achieving the above object, the material preparation step of preparing a flat iron material having a predetermined thickness and width and length; A ring forming step of inserting the flat iron material into a bending machine in a horizontal direction to bend the cut inner ring and the outer ring to produce a circular ring or a semi-circular ring; A welding step of forming a circular ring having a predetermined inner diameter and an outer diameter by cutting the one end surface of the cut circular ring or the end surface of the semi-circular ring in an inclined manner to form an angle of improvement and to close and weld the section having the angle of improvement to another cross section; ; A hydraulic pressure calibration step of correcting the plan view by pressing the circular ring on which welding is completed by a hydraulic press; A first turning step of turning the outer diameter portion and one side of the circular ring while fixing the inner side of the circular ring; A second turning step of turning the inner diameter and the other side of the circular ring while the outer side of the circular ring is fixed; And a groove cutting step of forming a ring flange by cutting and forming a groove having a predetermined size in the inner diameter portion of the circular ring.

In addition, according to the ring flange manufacturing method using a flat iron material of the present invention, the ring forming step comprises the step of circular bending in a spiral shape by introducing a standardized flat iron material in a horizontal direction to a three-roll bending machine; It is characterized by consisting of three to four cut circular ring by cutting the roll in the form of a circular ring by setting the roll bundle consisting of a circular ring bent in a spiral shape.

In addition, according to the ring flange manufacturing method using a flat iron material of the present invention, the ring forming step is characterized by molding into a circular ring or a semi-circular ring cut into a flat iron material cut to a predetermined length into a press bending machine.

In addition, according to the ring flange manufacturing method using a flat iron material of the present invention, the welding step is to form an improvement angle on one end surface of the circular ring and then weld the CO2 wire in a state in which the other end surface is in close contact with the end surface formed with the improvement angle Or forming a continuous circular ring by forming CO2 wires in a state in which improvement angles are formed at both end surfaces of the semi-circular rings, and both end surfaces of the other semi-circular rings are in close contact with both end surfaces of the semi-circular rings in which the improvement angles are formed. do.

In addition, according to the ring flange manufacturing method using a flat iron material of the present invention, the groove cutting step is to form a groove by cutting the inner surface of the circular ring to a certain size using a plasma torch to form a groove or caulking in a press machine, It is characterized in that the cutting of the pair of grooves formed in positions symmetric with each other.

In the ring flange manufacturing method using the flat iron material of the present invention, the ring flange is manufactured by circular bending and welding the flat iron material corresponding to the width and thickness of the ring flange without stamping the iron plate, thereby minimizing the unused portion and greatly reducing the manufacturing cost. The production of ring flanges through a reduced and continuous process has the effect of significantly improving productivity.

In addition, the ring flange manufacturing method using the flat iron material of the present invention is a standard ring, as well as a circular ring or a semi-circular ring formed by bending a pleated flat iron material of a predetermined length or more to form a ring ring formed by welding the ring Since the flange is processed, the manufacturing cost can be greatly reduced.

1 is a reference diagram for explaining a ring flange provided in the rear wheel axle housing of a commercial vehicle.
Figure 2 is a flow chart illustrating a method of manufacturing a ring flange according to the present invention.
Figure 3 is a process diagram showing a first embodiment of the present invention.
Figure 4 is a reference diagram showing a roll made up of a circular ring and a ring shape of a flat iron material using a three-roll bending machine in a first embodiment of the present invention.
5 is a process diagram showing a second embodiment of the present invention.

Hereinafter, a ring flange manufacturing method using the flat iron material of the present invention with reference to the accompanying drawings.

Ring flange manufacturing method using a flat iron material according to the present invention as shown in Figure 2, the material preparation step (S10) for preparing a flat iron material 11 having a predetermined thickness, width and length; A ring forming step (S20) of inserting the flat iron material (11) into a bending machine in a horizontal direction to form a cut circular ring (12) or a semi-circular ring (12 ') by bending to obtain a predetermined inner diameter and an outer diameter; One end surface of the cut circular ring 12 or the end surface of the semi-circular ring 12 'is inclinedly cut to form an improvement angle, and a circular shape having a predetermined inner diameter and an outer diameter by closely contacting and welding a cross section in which the improvement angle is formed. A welding step S30 of forming a ring 13; Hydraulic calibration step (S40) for pressing the circular ring 13 is completed welding with a hydraulic press to correct the plan view; A first turning step (S50) of turning the outer diameter portion and one side of the circular ring 13 while fixing the inner side of the circular ring 13; Secondary turning step (S60) for turning the inner diameter and the other side of the circular ring 13 in a state of fixing the outside of the circular ring (13); And a groove cutting step (S70) of forming a ring flange by cutting and forming a groove 14 having a predetermined size in the inner diameter portion of the circular ring 13.

Specifically, the first embodiment of the present invention, as shown in Figures 3 and 4, the material preparation step (S10) for preparing a standardized flat iron material 11 having a predetermined thickness, width and length; The flat iron material 11 is inserted into the three-roll bending machine in the horizontal direction to perform a circular bending in a spiral shape (S21), and a roll bundle made of a circular ring bent in a spiral shape in a band saw to form a circular ring. Comprising a step (S22) of forming three to four cut circular ring 12 by cutting, the circular ring for forming the flat iron material 11 into a cut circular ring 12 having a predetermined inner diameter and outer diameter dimensions Forming step (S20); Comprising a step of forming an improvement angle by inclined cutting the one end surface of the cut circular ring 12 with an oxygen cutter (S31), and the step of contacting the CO2 wire after the end of the improved angle formed in close contact with the other end surface, A welding step S30 of welding the cut circular ring 12 to form a circular ring 13 having a predetermined inner diameter and an outer diameter; Hydraulic calibration step (S40) for pressing the circular ring 13 is completed welding with a hydraulic press to correct the plan view; A first turning step (S50) of turning the outer diameter portion and one side of the circular ring 13 while fixing the inner side of the circular ring 13; Secondary turning step (S60) for turning the inner diameter and the other side of the circular ring 13 in a state of fixing the outside of the circular ring (13); A ring flange is formed by cutting the inner surface of the circular ring 13 to a predetermined size using a plasma torch or caulking in a press machine to form the grooves 14, but having a pair of grooves 14 cut and formed at symmetrical positions. It comprises a; groove cutting step (S70) to form a.

Standardized flat iron material 11 prepared in the material preparation step (S10) is a material (t), width (w) and length (l) of 16mm x 38mm x 6m, 19mm x 38mm x 6m Phosphorus materials, 19 mm x 50 mm x 6 m materials, 22 mm x 38 mm x 6 m materials, and the like are mainly used.

In the circular ring forming step (S20), as shown in FIG. 4, a 6 m-long flat iron material 11 is inserted into a three-roll bending machine in a horizontal direction to obtain a roll bundle made of a circular ring bent in a spiral shape. In the process of cutting it in the form of a circular ring by setting it in a band show, approximately 3-4 cut circular rings are obtained from the 6 m long flat iron material 11.

And, in the welding step (S30) after forming the angle of improvement is welded using a CO2 wire, manual welding as well as robot welding is possible.

In the groove cutting step (S70) to form a groove 14 by cutting the inner surface of the circular ring 13 to a predetermined size using a plasma torch or using a caulking die in a press. At this time, it is preferable that the grooves 14 are formed to be cut at positions symmetric with each other.

Referring to the ring flange manufacturing method using the flat iron material of the present invention configured as described above in detail.

First, the standardized flat iron material 11 of 6m length is prepared. When the preparation of the standardized flat iron material 11 is completed, the flat iron material 11 is inserted into a three-roll bending machine in a horizontal direction to bend in a spiral shape.

Accordingly, a roll bundle in the form of a spring consisting of a series of circular rings is obtained. When the roll bundle is set in a band saw and cut into a circular ring, approximately three to four cut circular rings 12 are obtained. do. In other words, by circular bending the flat iron material 11 and then cutting, a plurality of cut circular rings 12 having a predetermined inner diameter and an outer diameter are obtained.

Subsequently, one side end surface of the cut circular ring 12 is inclinedly cut by an oxygen cutting machine to form an angle of improvement, and the end surface of which the angle of improvement is formed is in close contact with another end of the CO2 wire. At this time, the welding method may be both manual welding or automatic welding using a robot. Accordingly, the circular ring 12 cut is formed into a circular ring 13 having a predetermined inner diameter and an outer diameter.

The completed circular ring 13 is often poor in flatness due to the spiral bending of the flat iron material 11 or the deformation in the welding process, so that the circular ring 13 is welded to a hydraulic press. By pressing, the plan and inner and outer diameter dimensions are corrected to fit the predetermined dimensions.

When the planar calibration of the circular ring 13 is completed, the surface of the circular ring 13 is machined to correspond to the specifications of the ring flange. That is, after turning the outer diameter portion and the upper surface of the circular ring 13 in the state of fixing the inside of the circular ring 13, the inner diameter of the circular ring 13 in the state of fixing the outside of the circular ring 13 Turning the bottom and bottom respectively.

Thereafter, the inner surface of the circular ring 13 is cut to a predetermined size using a plasma torch or caulked in a press to form the grooves 14. At this time, the pair of grooves 14 are cut and formed at positions symmetrical to each other to complete the ring flange.

In the above, the method for manufacturing a ring flange using a standardized flat iron material has been described. However, the ring flange may be manufactured from a flat iron material cut to a predetermined length rather than the standard flat iron material.

The first embodiment of the present invention for this purpose, as shown in Figure 5, the material preparation step (S10) for preparing a flat iron material 11 is cut to have a circumferential length or half the length of the ring flange; Ring forming step (S20) and the flat iron material 11 is inserted into the press bending machine in the horizontal direction and bent to a predetermined inner diameter and outer diameter to be cut into a circular ring 12 or a semi-circular ring 12 ' ; One end surface of the cut circular ring 12 or the end surface of the semi-circular ring 12 'is inclinedly cut to form an improvement angle, and a circular shape having a predetermined inner diameter and an outer diameter by closely contacting and welding a cross section in which the improvement angle is formed. A welding step S30 of forming a ring 13; Hydraulic calibration step (S40) for pressing the circular ring 13 is completed welding with a hydraulic press to correct the plan view; A first turning step (S50) of turning the outer diameter portion and one side of the circular ring 13 while fixing the inner side of the circular ring 13; Secondary turning step (S60) for turning the inner diameter and the other side of the circular ring 13 in a state of fixing the outside of the circular ring (13); And a groove cutting step (S70) of forming a ring flange by cutting and forming a groove 14 having a predetermined size in the inner diameter portion of the circular ring 13.

In the welding step (S30), in the case of the cut circular ring 12, the CO2 wire welding in a state in which the other end surface is in close contact with the end surface formed with the improvement angle, as in the first embodiment after forming an improvement angle on one end surface In the case of the semi-circular ring 12 ', each side end surface of the semi-circular ring 12' forms an improvement angle, and both end surfaces of the other semi-circular ring 12 'form an improvement angle. A continuous circular ring 13 is obtained by welding the CO 2 wire while being in close contact with both end surfaces.

Since other processes are the same as in the first embodiment, a detailed description thereof will be omitted.

For reference, unless otherwise defined herein, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. In addition, terms such as those defined in the commonly used dictionaries should be interpreted as having meanings consistent with the meanings in the context of the related art, and should be interpreted in ideal or excessively formal meanings unless expressly defined herein. Should not be.

In addition, the present invention may be variously modified and have various embodiments, and it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

11.Pyung iron material
12 ... cut circular ring
12 '... semi-circular ring
13 ... round ring
14 ... Home

Claims (5)

Material preparation step (S10) for preparing a flat iron material 11 having a predetermined thickness and width and length;
A ring forming step (S20) of inserting the flat iron material (11) into a bending machine in a horizontal direction to form a cut circular ring (12) or a semi-circular ring (12 ') by bending to obtain a predetermined inner diameter and an outer diameter;
One end surface of the cut circular ring 12 or the end surface of the semi-circular ring 12 'is inclinedly cut to form an improvement angle, and a circular shape having a predetermined inner diameter and an outer diameter by closely contacting and welding a cross section in which the improvement angle is formed. A welding step S30 of forming a ring 13;
Hydraulic calibration step (S40) for pressing the circular ring 13 is completed welding with a hydraulic press to correct the plan view;
A first turning step (S50) of turning the outer diameter portion and one side of the circular ring 13 while fixing the inner side of the circular ring 13;
Secondary turning step (S60) for turning the inner diameter and the other side of the circular ring 13 in a state of fixing the outside of the circular ring (13);
And a groove cutting step (S70) of forming a ring flange by cutting and forming a groove 14 having a predetermined size in the inner diameter portion of the circular ring (13).
The method of claim 1,
In the ring forming step (S20), the standardized flat iron material 11 is inserted into a three-roll bending machine in a horizontal direction to circularly bend in a spiral shape, and a roll bundle consisting of a circular ring bent in a spiral shape is set in a band saw. Ring flange manufacturing method using a flat iron material, characterized in that consisting of the step of forming three to four cut circular ring 12 by cutting in the form of a circular ring.
The method of claim 1,
The ring forming step (S20) is a ring flange manufacturing method using a flat iron material, characterized in that for molding into a circular ring 12 or a semi-circular ring (12 ') is cut into a flat iron material cut to a predetermined length into a press bending machine. .
The method of claim 1,
The welding step (S30) is to form an improvement angle on one end surface of the cut circular ring 12 and then weld the CO2 wire in the state in which the other end surface in close contact with the end surface formed with the improvement angle,
By forming an improvement angle on each end surface of the semi-circular ring 12 ', and welding both sides of the other semi-circular ring 12' to both end surfaces of the semi-circular ring 12 'with the improvement angle, Ring flange manufacturing method using a flat iron material, characterized in that to form a continuous circular ring (13).
The method of claim 1,
The groove cutting step (S70) is to cut the inner surface of the circular ring 13 to a predetermined size using a plasma torch or caulk in a press machine to form a groove (14), a pair of grooves in a symmetrical position with each other Ring flange manufacturing method using a flat iron material, characterized in that the cutting).

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