KR20160116095A

KR20160116095A - Roll forming method and apparatus for machining parts

Info

Publication number: KR20160116095A
Application number: KR1020150041586A
Authority: KR
Inventors: 하명원
Original assignee: 동원금속 (주)
Priority date: 2015-03-25
Filing date: 2015-03-25
Publication date: 2016-10-07

Abstract

The present invention relates to roll forming method and apparatus for machining parts. The roll forming method comprises: a step of supplying iron plates to continuously supply coil plates; a step of press-piercing to form a punched unit (H) on the continuously supplied iron plates at regular intervals; a step of roll-forming to mold the pierced iron plates into a cross-sectional shape of a product; a step of sensing to detect the distance of the molded iron plates conveyed and the position of the punched unit (H); and a step of cutting to put a cutting blade (501) to the punched unit (H) and to cut the continuously supplied molded iron plates to correspond to the length of the product. The roll forming apparatus comprises: an iron plate supply unit (10) to continuously supply a coil iron plate; a press unit (20) which has a punched unit (H) which is formed by continuously piercing the continuously supplied iron plates at regular intervals; a roll-forming molding unit (30) which has a plurality of molding rolls (301), which form the punched unit (H), mold the continuously supplied iron plates into the cross-sectional shape of the finished product, and are placed by being distanced from each other in a horizontal direction; a sensing unit (40) which has a detecting means which detects the distance of the molded iron plates conveyed, which are continuously discharged after the roll-forming molding, and the position of the punched unit (H); and a cutting unit (50) which puts a cutting blade (501) into the punched unit (H) in response to a signal provided by the sensing unit (40) and cuts the molded iron plates, which are continuously supplied, to correspond to the length of the product. Therefore, the present invention can improve productivity, produce high-quality products, and extend the service life of the cutting blade.

Description

[0001] The present invention relates to a roll forming method and apparatus,

The present invention relates to a method and an apparatus for manufacturing roll-formed parts, and more particularly, to a method and apparatus for manufacturing roll-formed parts, which can continuously perform a manufacturing process from a supply of a coil steel sheet to a roll- And reducing the load of the cutting edge during cutting of the formed steel plate, thereby prolonging the service life of the cutting blade, and a device therefor.

The term "roll forming" refers to a method of putting a material to be processed in between rolling rolls, and generally, a processing method in which a sheet material is inserted into a pipe or a shape of a section.

The products manufactured through the roll forming process are bent to have various cross-sectional shapes, and thus are used in the production of products for various industrial fields. Particularly, they are widely used in parts production in the automobile industry.

In general, the structural strength and collision safety of automobiles are very important. In addition, since the improvement of automobile performance and fuel efficiency through light weight is a key element of automobile development, many of the major components constituting the automobile are required to satisfy both weight and strength at the same time Particularly, parts related to crash safety of automobiles are manufactured by roll-forming high-tensile steels which are lighter than ordinary steels and have higher strength.

The high tensile strength steel used in the automobile industry has a tensile strength of 80 to 150 kg / mm 2 or more and has a very high tensile strength relative to the weight. Therefore, the use of automobile parts manufactured by roll forming the high tensile steel in the automobile industry, In fact.

On the other hand, passenger cars, which are one of the most representative automobiles, usually have a length of about 5 m. Therefore, most of the parts manufactured by roll forming among the parts used for passenger cars have a length as short as several meters or less.

Therefore, conventionally, when producing automobile parts through roll forming, first, a coil steel plate made of high tensile steel is first cut to meet the length of the product, then the cut steel plates are fed one by one into a roll forming machine to perform roll forming, To produce a product.

Japanese Patent Application Laid-Open No. 10-2014-0015660 Patent Registration No. 10-1359478

In manufacturing an automobile part through roll forming as described above, in the case of manufacturing a product by cutting the coiled iron plate to meet the length of the product and then performing roll forming on the cut iron plate, It is difficult to ensure the continuity of the foaming process, and the productivity of the product is deteriorated.

That is, conventionally, the coiled steel plate is continuously cut to fit the length of the product, the cut steel plate is transferred to a roll forming machine, and then the steel plate cut to the product length is roll- After the molding is completed in the roll forming machine and the molded article to be discharged is required to be welded, the molded article is transferred to a welding machine and welded.

Therefore, a separate work space is required for cutting and laminating the coil steel plate, and a transferring means for transferring the cut-laminated steel plate to a roll-forming molding machine or a force for controlling such transferring means is required, A separate work space is required for the loading of the molded products and a need for a means for transferring the molded products or a force for controlling such transfer means necessitates a lot of space in the construction of the manufacturing facility, There is a problem that the labor cost is increased and the manufacturing cost of the product is increased as a whole.

In addition, it is inevitable that redundant processes are unnecessary in the entire production process such as cutting, stacking, conveying and forming of coiled iron plate which is a material of the product, and reloading and transferring of the molded product again. There is a problem that the productivity is lowered.

Therefore, by continuously performing the series of processes required for the production of products ranging from the supply of the coil steel sheet, which is the material of the product, to the roll forming, welding and cutting, the continuous process is ensured to improve the productivity and facilitate the mass production of the products There is an urgent need to develop a method and apparatus for manufacturing roll-formed parts.

The present invention provides a method of manufacturing a roll forming part and an apparatus therefor to solve the conventional problems as described above, comprising: a steel plate feeding step of unrolling and continuously feeding a coiled coil wound in a roll state; A press piercing step of forming perforations (H) at regular intervals on a continuously supplied iron plate; Forming a pierced iron plate into a cross-sectional shape of the product; A sensing step of detecting a conveying distance of the formed molded iron plate and a perforation (H) position; And a cutting step of feeding the cutting blade (501) with a perforation (H) to cut the continuously supplied shaped iron plate to the length of the product, thereby forming a roll forming part manufacturing method,

An iron plate supply part (10) for releasing and continuously supplying a coiled iron plate wound in a roll state; A press section 20 continuously piercing iron plates continuously fed to form a perforation H at regular intervals on an iron plate; A roll forming section (30) in which a plurality of forming rolls (301) for sequentially forming an iron sheet continuously formed by forming a perforation (H) so as to have a cross sectional shape of the finished product are horizontally spaced apart; A sensing unit (40) having detection means for detecting a conveyance distance of the formed steel plate continuously discharged after the roll forming molding and a position of the perforation (H); And a cut-out portion (50) for cutting the formed iron plate continuously fed with the cutting blade (501) inserted into the perforation (H) according to a signal provided by the sensing portion (40) By constructing the apparatus, it is possible to continuously manufacture the product from the supply of the coil steel sheet to the cutting after the roll forming, so that it is possible to mass-produce high quality products with a minimum of manpower, The space utilization can be maximized through efficient arrangement of the manufacturing apparatus, and the life of the cutting blade for cutting the formed iron plate can be extended.

The method and apparatus for manufacturing a roll forming part of the present invention as described above can continuously perform the manufacturing process of the product from the supply of the coil steel sheet to the cutting after the roll forming and without cutting unnecessary processes, At the same time, it is possible to mass-produce the product with a minimum of manpower, thereby reducing the manufacturing cost of the product.

In addition, it is possible not only to increase product competitiveness through mass production of high quality products by maintaining uniform product quality even in continuous production of products, but also to arrange all the production lines necessary for product production to be connected in a straight line, There is an advantage that the space utilization can be maximized and the purchase cost of the real estate necessary for building the production line can be reduced.

Further, in the process of cutting the rolled forming molded iron sheet to the length of the finished product, the cutting blade is inserted into the punch formed through the piercing to cut the formed iron plate, thereby reducing the load of the cutting blade made of the high- The service life of the cutting blade is extended, and more accurate and precise cutting of the finished product is achieved.

1 is a block diagram according to an embodiment of a method of manufacturing a roll forming part of the present invention.
2 is a block diagram according to an embodiment of a roll forming processed part manufacturing apparatus of the present invention.
3 is a perspective view showing an iron plate on which a perforation is formed by a press section of a roll forming part manufacturing apparatus of the present invention.
4 is a perspective view showing a rolled forming plate formed by a roll forming forming unit of a roll forming processed part manufacturing apparatus of the present invention.
5 is a cross-sectional view showing a state in which a formed iron plate is cut by a cutting portion cutting edge of a roll forming processed part manufacturing apparatus of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method and an apparatus for manufacturing a roll-formed part of the present invention will be described in detail with reference to the accompanying drawings.

A method of manufacturing a roll forming part according to the present invention comprises: an iron plate feeding step of loosening and continuously feeding a coil iron plate as shown in FIG. 1; A press piercing step of forming perforations (H) at regular intervals on a continuously supplied iron plate; Forming a pierced iron plate into a cross-sectional shape of the product; A sensing step of detecting a conveying distance of the formed molded iron plate and a perforation (H) position; And a cutting step of cutting the cut-forming blade 501 with the perforation H to cut the continuously supplied shaped iron sheet to fit the product length.

In the steel sheet supplying step, a coil steel plate having a tensile strength of 80 to 150 kg / mm < 2 > or higher is wound in a roll form and fed continuously at a constant speed using an uncoiler. However, if additional processes such as welding are required for the molding of finished products produced through roll forming, it is also possible to release the iron plates intermittently and supply them.

The press piercing step forms perforations (H) at regular intervals on the continuously supplied iron plates. At this time, the perforation H is used not only for detecting the distance of feeding the formed iron plate when the iron plate is formed by roll forming and then cutting the formed iron plate to fit the length of the product, The cutting edge 501 is inserted into the perforation H to cut the formed steel plate so as to prevent the deformation of the cross-sectional shape of the formed steel plate which may be caused by the pressure applied to the cutting edge 501 in the cutting process of the formed steel plate And to reduce the load applied to the cutting blade 501.

Therefore, it is preferable that the perforations H are formed at appropriate positions according to the cross-sectional structure of the article so that the iron plate is formed on the flat surface, the side surface, and the bottom surface of the rolled forming molded steel plate.

In the roll forming step, an iron plate continuously fed after being pierced in the press piercing step is stepwise shaped to have a sectional shape of the finished product by using a plurality of forming rolls 301 spaced horizontally.

It is to be noted in advance that the number of the forming rolls 301 necessary for performing the roll forming forming step or the spacing distance between the forming rolls 301 can be adjusted according to the length or sectional shape of the finished product.

The sensing step detects a conveying distance of the continuously-discharged molded iron plate while being formed in the roll forming forming step, and provides the detection signal to a control unit for controlling the operation of the cutter 50.

In the sensing step, the encoder 401 is used to detect the distance of the formed iron plate, and the mark sensor 402 is used to detect the position of the perforation H formed at regular intervals on the formed steel plate.

The cutting step cuts the formed steel plate, which is formed and continuously discharged in the roll forming step, to fit the length of the finished product.

In the cutting step, a press equipped with a cutting blade 501 may be used for cutting the formed iron plate.

On the other hand, the apparatus for producing a roll forming part of the present invention comprises an iron plate supply unit 10 for unrolling and continuously supplying a coiled iron plate wound in a roll state as shown in FIG. A press section 20 continuously piercing iron plates continuously fed to form a perforation H at regular intervals on an iron plate; A roll forming section (30) in which a plurality of forming rolls (301) for sequentially forming an iron sheet continuously formed by forming a perforation (H) so as to have a cross sectional shape of the finished product are horizontally spaced apart; A sensing unit (40) having detection means for detecting a conveyance distance of the formed steel plate continuously discharged after the roll forming molding and a position of the perforation (H); And a cutting unit 50 for cutting the formed steel plate continuously supplied with the cutting blade 501 inserted into the perforation H according to a signal provided from the sensing unit 40 according to the length of the product.

In addition, a conveyor may be further provided to feed the steel sheet continuously fed from the steel sheet feeding part 10 to the cutting part 50 continuously.

The steel plate feeder 10 is made by winding a coil steel plate having a tensile strength of 80 to 150 kg / mm < 2 > or more in a rolled state and unwinding the coil steel plate while sandwiching a coil steel plate on a rotating mandrel, Use the Uncoiler to take out and rotate the coils as they are pulled out.

When uncoiler is used to uncoil the coil steel sheet and feed it to the press section 20, it is preferable to continuously feed the steel sheet while releasing the steel sheet without rest. However, the present invention is not limited to this. It is possible to provide an intermittent feeding method in which a predetermined length of the iron plate is unloaded and then stopped for a while and then fed again by a predetermined length to supply the iron plate in a state in which the iron plate is fixed at a predetermined position. Leave.

The press section 20 continuously press-pierces the steel plate continuously fed from the steel plate feed section 10 using a press equipped with at least one punching blade to form a perforation H at regular intervals.

At this time, the punching blades are arranged in a circle, a rectangle, or a square at regular intervals so that a plurality of perforations H are formed at the same time while maintaining a constant spacing. In the case where a plurality of punching blades are mounted on the press, the intervals between the punching blades are set such that the perforations H formed by the punching blades are positioned on the flat, side, and bottom surfaces of the roll- It is adjustable according to the sectional structure.

The roll forming unit 30 includes a plurality of forming rolls 301 arranged in an upper and a lower pair in order to form an iron plate continuously fed through the press unit 20 so as to have a cross- Are arranged in the horizontal direction.

At this time, the forming roll 301 is rotated from a forming roll 301 for initially forming a flat steel sheet fed through the press portion 20 to a final forming roll 301 for finally molding the steel sheet into a sectional shape of the product, A forming roll 301 having a section conforming to each forming step is sequentially arranged so that the forming rolls 301 to 30 are separated from each other and the forming rolls 301 are used to form the steel plates in stages.

The sensing means of the sensing unit 40 is provided with an encoder 401 for detecting the distance of conveyance of the formed steel plate so that the sensing unit 40 is contacted with the formed steel plate formed into a sectional shape of the final product in the roll forming forming unit 30 and continuously discharged And calculates the amount of rotation of the rotating encoder 401 to detect the conveying distance of the formed steel plate.

In addition, the sensing means may include a mark sensor (402) for sensing a perforation (H) formed at a predetermined interval (cut interval) on the formed metal plate, for sensing light passing through a perforation (H) It is preferable to use a general light permeable type sensor for sensing the position of the light source H, but it is not limited to this.

When the conveying distance of the molded iron plate provided in the sensing unit 40 coincides with the length of the finished product, the cutting unit 50 cuts the formed iron plate to fit the finished product length while the lower end is inserted into the perforation H of the formed iron plate And has a cutting edge 501.

It is preferable that the cutting edge 501 is formed in a wedge shape so as to be easily inserted into a perforation H formed on a formed steel plate. If the width of the formed steel plate is wide, And the lower end of the cutting blade 501 is formed into a shape that is simultaneously inserted into the plurality of perforations H, as shown in FIG.

In addition, it is preferable to use a press as the elevating means for raising and lowering the cutting blade 501, but it is not limited thereto.

The control unit may be configured to include the steel plate supply unit 10, the press unit 20, the roll forming unit 30, the sensing unit 40, and the cutting unit 50, And is operated by an operator through a separate control panel or the like in order to control the operation of the entire roll forming part manufacturing apparatus. The present invention corresponds to a known technique that can be easily understood and practiced by those skilled in the art, The detailed description thereof and the illustration of the drawings are omitted.

A process for manufacturing a roll-formed part to which the present invention is applied and a process for manufacturing a roll-formed part according to the apparatus will be described below.

When the steel plate feeder 10 of the present invention continuously feeds the coil steel plate with the high tensile strength of 80 to 150 kg / mm2 or more rolled up in a roll state to the press portion 20 at a constant speed, the press portion 20 The continuously supplied iron plate is press-pierced to form a plurality of perforations (H) on the iron plate.

The iron plate on which the perforations H are formed while being passed through the press portion 20 is continuously introduced into the roll forming forming portion 30 and then rolled to have a sectional shape of the finished product and then discharged. The perforations H formed on the press portion 20 are positioned on the flat surface, the bottom surface and the side surface of the formed molded iron plate.

Therefore, when the molded steel plate continuously discharged from the roll forming unit 30 is supplied to the sensing unit 40, the distance of rotation of the encoder 401, which rotates in accordance with the feeding of the formed steel plate, The sensing unit 40 having a detecting means for detecting the position of the forming plate H detects the feeding distance of the formed steel plate and provides it to the control unit.

The control unit controls the operation of the cutting unit 50 so that the cutting edge 501 of the cutting unit 50 is lowered when the conveying distance of the formed iron plate is compared with the finished product length according to the signal provided by the sensing unit 40, So that the continuously supplied molded iron plate is cut to fit the length of the product.

In the process of cutting the formed steel plate as described above, the cutting edge 501 of the cut portion 50 is inserted into the perforation H formed on the formed steel plate to cut the formed steel plate, Since the area is reduced to 1/3 of the total cross sectional area, the load applied to the cutting blade 501 by the ultra-high strength steel sheet is reduced, so that the cut surface is clean and precise, and the life of the cutting blade 501 .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the invention as defined by the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

10: steel plate supply part 20: press part
30: roll forming section 301: forming roll
40: sensing part 50:
501: Cutting blade A: Steel plate
A1: Coil iron plate A2: Molded iron plate
H: Thinning

Claims

An iron plate supply step of unrolling and continuously supplying a coiled iron plate wound in a roll state;
A press piercing step of forming a perforation (H) at a constant interval on the continuously supplied steel sheet;
A forming step of forming the pierced iron plate into a sectional shape of the product;
A sensing step of detecting a transfer distance and a perforation (H) position of the formed molded iron plate;
And a cutting step of feeding the cutting blade (501) into the perforation (H) to cut the continuously supplied shaped iron plate to fit the length of the product.

An iron plate supply part (10) for releasing and continuously supplying a coiled iron plate wound in a roll state;
A press section 20 continuously piercing the iron plates continuously fed to form a perforation H at regular intervals on the iron plate;
A roll forming unit 30 having a plurality of forming rolls 301 arranged in a horizontal direction so as to sequentially form an iron plate continuously supplied with the perforations H so as to have a cross sectional shape of the finished product;
A sensing unit (40) having detection means for detecting a conveyance distance of the formed steel plate continuously discharged after the roll forming molding and a position of the perforation (H);
And a cutting unit 50 cutting the formed steel plate continuously fed with the cutting blade 501 into the perforation H according to a signal provided from the sensing unit 40, Roll forming part manufacturing equipment.

3. The method of claim 2,
And a welding portion for performing welding at a required position of the rolled forming formed steel plate between the roll forming forming portion (30) and the sensing portion (40).

3. The method of claim 2,
Wherein the coil steel plate is a high tensile steel having a tensile strength of 80 to 150 kg / mm < 2 > or more.