KR19990083936A - a bending machine for manufacturing steel door - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending machine for manufacturing steel doors, which is used to bend the upper and lower hemming part components of a plate to constitute a front plate or a rear plate in the form of a skirt in manufacturing a non-welding steel door. The two bending units for bending the upper and lower hemming part components of the sheet in the form of a skirt by hydraulic pressure are installed to face each other on the main frame, and a table for supporting the sheet is provided on the main frame between the bending units. The lower part of the main frame is provided with a hydraulic motor for providing hydraulic pressure to the bending units, and a controller for controlling the operation of the bending units, respectively. The bending unit is provided with a die block on which the periphery of the plate is placed on the base having the support frame so that the hemming component is protruded, and a lifting cylinder driven by a hydraulic motor is installed on the support frame. And a punch assembly for bending the hemming component. In the punch assembly, a pressing plate for pressing a plate on the lower portion of the lifting plate fixed to the piston rod is supported by a urethane spacer, and the punch block is fixed to the lifting plate outside the pressing plate. Therefore, the upper and lower hemming portions of the plate to form the front plate or the rear plate for the non-welded steel door can be easily bent in a skirt form by one operation.

Description

Bending machine for manufacturing steel door {a bending machine for manufacturing steel door}

The present invention relates to the production of steel doors, and more particularly, to manufacture a front plate or a thick plate in the manufacture of a non-welded steel door for assembling and fixing the front plate and the rear plate without welding. Bending machine for steel door manufacture used to bend the upper and lower hemming part structure part of a board | plate material.

The steel door is a generic term for a door made of metal such as iron, aluminum, or stainless steel, and is widely used according to the advantages of cheaper, higher mechanical strength and safety than wood. In particular, in the case of buildings with dense structures such as buildings or apartments, a fire protection function is strongly required, and all entrances and exits employ steel doors.

On the other hand, such a steel door is generally configured by welding the front plate and the rear plate at intervals, and the two channels are inserted into the upper and lower ends of the space formed by the front and rear plates, respectively.

However, in this case, the front plate and the rear plate and the respective channels are fixed to each other by welding, and the manufacturing work is not only complicated, but also the welding point is exposed to the outside, thereby degrading the beauty of the steel door.

Accordingly, the present applicant has filed the same method as the present application, as shown in Figures 1 and 2, a steel door assembly method for assembling and fixing each component without welding. This is a first hemming which functions as a windshield 15 at the other end while forming an inward flange 20 having a plurality of slots 20a in one skirt 16 of the front plate 11. The second and third hemming portions 18 and 19 are formed by forming the portions 17 and inserting corresponding skirts 13a and 14a of the respective channels 13 and 14 at the upper and lower ends thereof. Form. The inboard flange 25 having a plurality of hooks 26 hooked into the slot 29a is formed in the first skirt 21 on one side of the rear plate 12, and the front plate 11 is formed at the other end thereof. A second skirt 22 having an outward flange 27 inserted and pressed into the first hemming portion 17 is formed, and corresponding skirts 13b and 14b of the respective channels 13 and 14 are formed at the upper and lower ends thereof. ) To form the first and second hemming portions 23 and 24 to be compressed, thereby assembling and fixing each element without welding.

As shown in FIG. 3, first, a door lock, a hinge, and the like are mounted on a plate 11 '(only a plate for the front plate is shown in the drawing) which will constitute the front plate 11 and the rear plate 12, respectively. And a plurality of hooks or slots 20a, a cut section C at each corner for constituting the skirt section 16 'and the hemming section 17'. It is produced by forming punching parts, and bending each of the required front and rear plates 11 and 12 and assembling each other.

Here, the upper and lower hemming part components 18 'and 19' of the front plate 11 or the rear plate 12 insert the skirts 13a, 13b or 14a, 14b of the upper and lower channels 13 and 14. Since the front and rear plates 11 and 12 must be bent in the form of a skirt before assembly, the sides 16 of the front and rear plates 11 and 12 have skirts 16 which constitute both sides of the door. 21) 22 and the windshield 15 are bent first, and there is a problem that it is difficult to bend the conventional bending machine.

The remainder 28 is a honeycomb core and 29 is a foamed urethane.

The present invention provides a bending machine for manufacturing a steel door for bending the upper and lower hemming parts of the plate material to form the front plate or the rear plate in the form of a skirt in the above-described non-welding steel door production. have.

Another object of the present invention is to provide a bending machine for manufacturing a steel door which can bend the upper and lower hemming part components at the same time in one operation.

Still another object of the present invention is to provide a bending machine for manufacturing a steel door capable of precisely bending upper and lower hemming parts regardless of the size of the plate.

1 is a cross-sectional view showing an example of a steel door,

2 is a cross-sectional view taken along the line II-II of FIG. 1;

3 is an exploded view showing the front plate,

4 is a front view showing a bending machine according to the present invention,

5 is a plan view thereof;

6 is a side view taken along the VI of FIG.

7 is a perspective view taken along the line of FIG. 4, FIG.

8 is a cross-sectional view showing a die block setting structure;

9 is an excerpt sectional view showing a positioning structure;

10 is a cross-sectional view taken along line VII-VII of FIG. 9;

11A to 11C are excerpted side views illustrating a variable structure of a diblock;

12 is an excerpted side view showing a mounting state of a sheet material on a die block;

13A to 13C are excerpts sequentially showing the operating state of the present invention.

<Explanation of symbols for main parts of drawing>

11: Board 11 ′: Plate (which will form the board)

12: Plate 13, 14: (upper and lower) channel

18 ', 19': Upper and lower hemming part components

100: main frame

200: bending unit

210: base 220: support frame

230: die block 231: main block (of die block)

232: step (233) of main block (233): subblock (of dieblock)

234: home of the main block 241: platform

243: pressing plate 245: punch block

250: lifting cylinder 261: guide rail

262: guide block 263: feed screw

266: bush

300: table 400: hydraulic motor

500: controller

In order to achieve the above object, the present invention is to provide a plate or a plate that will constitute the front plate or the rear plate in the fabrication of non-welded steel doors that are mutually assembled and fixed at intervals by inserting and compressing two channels into respective upper and lower hemming portions. A bending machine for producing a steel door, which is used to bend the upper and lower hemming portions in a skirt form, comprising: a main frame; Two bending units which are provided on the main frame at intervals to face each other, and which respectively bend the upper and lower hemming part components of the sheet in a skirt form by hydraulic pressure; A table installed on the main frame between the two bending units to support the plate to be bent; A hydraulic motor installed on the main frame to provide hydraulic pressure to each bending unit; And a controller (controller) for controlling the operation of the bending units.

According to one preferred feature of the present invention, each bending unit has a base having a support frame on one side of the upper surface, and a die block mounted on the other side of the base, on which the edge portion of the plate is mounted so that one hemming portion component protrudes outward. an elevating cylinder mounted on a die block, a support frame and selectively driven by a hydraulic motor, an elevating plate mounted on an elevating piston rod of the elevating cylinder, and elevating an elevating plate; It consists of a pressing plate which is supported by the pressing plate against the die block, and the punch block is fixed to the lifting plate to be located on the outside of the pressing plate to bend the hemming portion of the plate.

Accordingly, the present invention can easily bend the upper and lower hemming parts of the plate to form the front plate or the rear plate for the non-welded steel door by a single operation in a skirt form, thereby exhibiting a great effect on improving the manufacturability of the steel door. do.

Such specific features and other advantages of the present invention will become more apparent from the following description of the preferred embodiments with reference to the accompanying drawings. Parts not shown will be described with reference to FIGS. 1 to 3.

4 to 6, the bending machine for manufacturing a steel door according to the present invention is installed at intervals so as to face each other on the main frame 100 and the main frame 100 so as to face the front plate 11 or the rear plate 12. Between the two bending unit 200 and the two bending unit 200 for bending the upper and lower hemming parts 18 '(19') of the plate member 11 'to form a skirt, respectively Installed on the main frame 100 to control the operation of the table 300 for supporting the plate 11 'and the hydraulic motor 400 and the bending unit 200 for supplying hydraulic pressure to the bending units 200, respectively. It is composed of a controller 500.

The main frame 100 has a bed 110 on its upper surface, and has a support plate 120 on which a hydraulic motor 400 is mounted near a lower end thereof.

In FIG. 7, each bending unit 200 has a base 210 fixed on the bed 100 of the main frame 100 with a support frame 220 on one side of the upper surface, and mounted on the other side of the base 210. And a die block 230 on which an edge portion of the plate 11 'to be bent is placed, and a hemming portion configuration 18' (19 ') of the plate 11' positioned on the upper portion of the die block 230. The lift assembly 250 is installed perpendicular to the punch assembly 240 and the support frame 220 to bend them in the form of a skirt, and comprises a lifting cylinder 250 for elevating the punch assembly 240.

The support frame 220 is provided with a mounting plate 222 is installed between the two substantially support L-shaped support 221 is installed on the base 210 at intervals in the width direction of the plate (11 '), this mounting The lifting cylinder 250 is installed in the center on the plate 222 so that the piston rod 251 penetrates. The lifting cylinder 250 is connected to the hydraulic motor 400 and is selectively operated according to the signal of the controller 500.

The die block 230 may be configured as a single body, but preferably, as shown in FIG. 11, the main block having the stepped portion 232 on one side of the upper surface to bend the plate 11 'of various sizes ( 231 and a plurality of subblocks 233 selectively mounted on the stepped portion 232 of the main block 231 according to the size of the plate 11 '. The main block 231 is configured to correspond to a steel door width of the minimum size in which the length except for the step portion 232 is commonly used, and the length of each subblock 233 and 233 'is mounted to the main block 231. The length of both is set so as to correspond to the widths of steel doors of different sizes which are commonly used. The skirt 16, 21, 22 and the windshield 15, which constitute the side of the door, are formed at both side ends of the plate 11 'on which the upper and lower hemming part components 18' and 19 'are to be bent. It is because already formed, since the structure of a single body they cause interference because only one plate 11 'of any size can be bent.

On the other hand, the free end side of the plate 11 'is formed with an outward windshield 15 or an outward flange 27 fitted and crimped, so that the front end surface of the die block 230 may be formed in a plane, but the fixed end side thereof. The skirt 16 or 21 formed at the side end has an inward flange 20 or 25, so that when the front end surface of the die block 230 is formed in a flat surface, it is not possible to fully support the plate 11 '. Therefore, as shown in FIG. 12, the other end of the die block 230, that is, the other end surface of the main block 231, preferably the fixed end side of the plate 11 ′ having the inward flange 20 or 25. Guide grooves 234 through which skirts 16 or 21 are fitted are formed. The guide groove 234 serves to guide the setting of the plate 11 'as well as to increase the accuracy of the setting.

Such a die block 230 is preferably installed to enable fine adjustment of its mounting position for accurate bending of the plate 11 '. That is, as shown in FIG. 7 and FIG. 8, screw holes 235 are formed through both ends of the main block 231, respectively, and are supported before and after on the base 210 so as to correspond to the through holes 235. After each of the blocks 211 are installed, the fixing bolts 236 pass through the respective supporting blocks 211 to be coupled to both sides of the screw holes 235 of the main block 231, thereby forming the base block 210. Will be mounted on the

The punch assembly 240 is a lifting plate 241 which is fixed to the tip of the piston rod 251 of the lifting cylinder 250, and a plate material 11 placed on the die block 230, which is located below the lifting plate 241 A pressing plate 243 for pressing '' and a punch block 245 for bending the upper and lower hemming part components 18 'and 19' of the plate 11 'in a skirt form. The pressing plate 243 is movably supported at intervals through the urethane spacers 244 to the fixed plate 242 fixed to the lower surface of the elevating plate 241. The punch block 245 is fixed to the lower surface of the elevating plate 241 so as to be positioned outside of the pressing plate 243, that is, directly above the hemming part constitution portions 18 'and 19' of the plate 11 '. The lower surface of 245 is located on the same surface as the lower surface of the pressure plate 243 or slightly above. In addition, two guide posts 246 that guide and support the lifting of the lifting plate 241 are vertically installed to penetrate both sides of the mounting plate 222 of the support frame 220.

Meanwhile, in order to correspond to various sizes of the plate 11 ', the length direction as well as the width direction of the plate 11' should be adjustable, and at least one bending unit 200 is relative to the main frame 100. Position adjustment means for changing the installation position is provided. The position adjusting means may be configured in various forms, for example, as shown in FIGS. 9 and 10, one bending unit 200 is configured to be slidable with respect to the main frame 100.

That is, in FIGS. 9 and 10, a guide plate 260 having two guide rails 261 on both sides of the upper surface of the bed 110 is installed, and a base of the bending unit 200 is provided. 210 is provided on both sides of the guide block 262 which is movably coupled with the two guide rails 261. And between the two guide rails 261, the conveying screw 263 is supported by the two support blocks 265 of the guide plate 261 so as to be idling, a handle for rotating it at one end of the conveying screw 263 (264) ) Is provided. A bush 266 fixed to the lower surface of the base 210 is screwed to the transfer screw 263.

On the other hand, one support 221 side of the support frame 220 is connected to the controller 500, the upper and lower limit switches (limit switches: 271, 272) for limiting the stroke of the lifting cylinder 250 is provided at appropriate intervals, On one side of the steel plate 241, sensing rods 273 having two sensing protrusions 274 and 275 at upper and lower intervals are vertically installed.

The table 300 is installed such that its upper surface is flush with the upper surface of the die blocks 230 of the two bending units 200, and has a width corresponding to the width except for the stepped portion 242 of the main block 241. .

Next, the operation of the bending machine for manufacturing a steel door of the present invention configured as described above will be described in parallel with FIG. 13.

First, as shown in FIGS. 11A to 11C, the width of the die block 230 is adjusted according to the size of the plate 11 ′ to be bent. That is, only the main block 231 is taken or the sub-blocks 233 and 233 'are mounted on the stepped portion 232 of the main block 231.

Next, as shown in FIG. 8, the fixing position of the die block 230 is accurately set by tightening or releasing the respective fixing bolts 236 to finely move the die block 230 on the base 210.

In this state, as shown in Fig. 9, the handle 264 is turned in the forward or reverse direction to adjust the distance between the two bending units 200 to correspond to the length of the target plate 11 '. That is, by turning the handle 264, the feed screw 263 is idling in the forward or reverse direction, thereby moving the bush 266 in the selected direction along the feed screw 263, so that one bending unit 200 is opposed. To be close to or away from the bending unit 200. At this time, the moving bending unit 200 is slidably supported by the two guide rails 261, and thus is very stable and smoothly moved.

Next, the plate 11 'to be bent is placed on the table 300. In this case, as shown in FIG. 12, the fixed end skirt 16 or 21 having the inward flange 20 or 25 is fitted into the guide groove 234 of the die block 230, as shown in FIG. 12. As well as being stably supported, it is possible to accurately set the relative position of the die block 230. When the setting is completed in this manner, as shown in FIG. 13A, upper and lower hemming part components 18 and 19 of the plate 11 ′ protrude out of each die block 230 to form two punch blocks 245. It is located directly underneath.

In this state, after applying power to the controller 500, the bending unit 200 is operated. Then, the hydraulic motor 400 is driven by the operation signal of the controller 500. Accordingly, the hydraulic pressure is supplied to the lifting cylinder 250, and the piston rod 251 is lowered. At the same time, the punch assembly 240 fixed to the piston rod 251 is lowered while being guided to the guide posts 246, and as shown in FIG. 13B, the pressing plate 243 is formed at the edge of the plate 11 '. By pressing, the plate 11 'is fixed. Subsequently, as the urethane spacer 244 is compressed as shown in FIG. 13C by the subsequent lowering of the punch assembly 240, each punch block 245 is further lowered to protrude outward of the die block 230, respectively. The upper and lower hemming components 18 'and 19' of the 11 'are pressed, so that each of the hemming components 18' and 19 'is centered on the outer edge of the die block 230. You will bend down.

At this time, the sensing rod 273 installed on the elevating plate 241 is lowered together, and when the upper sensing protrusion 274 contacts the upper limit switch 271 installed on the support 221, the contact signal is controlled by the controller 500. As a result of the transmission, the lowering of the piston rod 251 is stopped and simultaneously raised. Then, the punch block 245 is raised while the urethane spacer 244 is restored by the restoring elasticity, and then the pressing plate 243 is raised to release the restraint of the plate 11 '. At this time, when the lower sensing protrusion 275 of the sensing rod 273 that rises together with the punch assembly 240 contacts the lower limit switch 272, the driving of the lifting cylinder 250 is stopped so that the upper and lower hemming part components ( 18 'and 19' are completed.

Next, after the bending of the plate 11 'is completed, the bending of the next plate 11' is performed in the above-described manner.

As described above, according to the present invention, the upper and lower hemming portions of the plate to form the front plate or the rear plate for the non-welded steel door can be bent accurately and easily by a single operation in the form of a skirt that can be assembled with the channel. . Therefore, the present invention has the effect of greatly improving the manufacturability of the steel door.

Claims (6)

By inserting and compressing two channels into the upper and lower hemming portions, the upper and lower hemming portions of the plate to form the front or rear plate are skirted in the manufacture of a non-welded steel door in which the front and rear plates are assembled and fixed to each other at intervals. As a bending machine for manufacturing steel doors used for primary bending in form, Main frame; Two bending units installed on the main frame at intervals to face each other and for bending the upper and lower hemming components of the sheet in a skirt form by hydraulic pressure; A table mounted on a main frame between the two bending units to support the plate to be bent; A hydraulic motor installed on the main frame to provide hydraulic pressure to each bending unit; Controller for controlling the operation of the bending unit: a bending machine for producing a steel door, characterized in that it comprises a. The method of claim 1, wherein each bending unit, A base having a support frame on one side of the upper surface, a die block mounted on the other side of the base and mounted on an edge of a plate such that any one hemming portion component protrudes outward, and mounted on the support frame and selectively driven by a hydraulic motor A lifting cylinder to be mounted, a lifting plate mounted on the piston rod of the lifting cylinder to move up and down, a pressing plate elastically supported on the lower portion of the lifting plate to press the plate against the die block, and being lifted to be positioned outside the pressing plate. Bending machine for steel door manufacturing, characterized in that the punch block is fixed to the steel sheet made of a hemming portion of the plate bending portion. The method of claim 2, wherein the dieblock, Bending machine for manufacturing a steel door, characterized in that the main block having a stepped portion on one upper surface, and a plurality of sub-blocks are selectively mounted on the stepped portion of the main block according to the size of the plate. The bending machine for steel door manufacturing according to claim 2 or 3, wherein a guide groove in which the skirt of the plate is fitted is seated on the other end of the main block of the die block. 3. The steel according to claim 1 or 2, wherein at least one bending unit further includes an installation position adjusting means for the main frame so that the gap between the two bending units can be adjusted according to the size of the plate. Bending machine for door making. The method of claim 5, wherein the position adjusting means, A transfer screw which is supported on the main frame in such a manner as to be idlely rotated on the main frame, a bush which is installed on a lower surface of the base of the bending unit and screwed to the transfer screw, and installed on both sides of the transfer screw on the main frame The two guide rails are installed, and the bending machine for steel door manufacturing, characterized in that composed of two guide blocks which are installed on the base lower surface of the bending unit and movably coupled to the two guide rails, respectively.