KR101034592B1 - Flexible sheet forming apparatus with multiple forming punches and forming method using the same - Google Patents

Abstract

The present invention relates to a sheet forming apparatus in which a plurality of forming punches are arranged up and down, each forming punch having a punch head, a hollow outer member having an inner thread, and an inner thread having an outer thread inserted into the outer member. A member, wherein one of the outer member and the inner member is connected to the punch head and the other is connected to the axis of rotation, and includes one or more punch adjustment motors capable of providing torque in engagement with the axis of rotation of each of the forming punches. Characterized in that.

The plate forming apparatus of the present invention configured as described above has an advantage that the load-bearing force is greatly increased as a die-less plate forming apparatus suitable for forming a small amount of various sheets, thereby stably forming plates of various sizes and thicknesses.

Plate, Moldless Sheet Forming, Forming Punch, Punch Control Motor

Description

Plate forming apparatus including a plurality of forming punch and plate forming method using the same {FLEXIBLE SHEET FORMING APPARATUS WITH MULTIPLE FORMING PUNCHES AND FORMING METHOD USING THE SAME}

The present invention relates to a sheet forming apparatus and a method, comprising a plurality of forming punches up and down with a plate to be molded between, and to adjust the length of each forming punch according to the target shape of the plate to form a die-free mold An apparatus and a sheet metal forming method using the apparatus.

In general, in order to mold a plate such as a thick plate or a thin plate into a predetermined target shape, molds 101 and 103 that correspond to the target shape are disposed on the upper and lower portions as shown in FIG. 1, and the plate member 105 is pressed by molding. Conventional sheet metal forming method using a mold is a method widely adopted for mass production of small or medium products mainly in a manner suitable for mass production of a single product. However, in the case of forming a large number of large plates, such as in the manufacture of ships or aircrafts, molds and molding presses also need to be large, increasing costs, but the number of moldings is not significant and wasteful. Since there are many problems such as problems, it is difficult to use a mold.

As one of the methods for forming such a large plate, a plate forming apparatus has been proposed in which a plurality of forming punches, each of which is connected to an electric motor or a step motor, are vertically arranged without using a mold, as described in US Patent 4212188. This device is shown in Figure 2, each forming punch is a rod 111 with a thread is moved up and down by the motor 112, the contact portion 113 is a ball joint at the rod end of the plate 105 The plate is molded by pressing from above and below while touching the plate.

However, such a plate forming apparatus has to be provided with a motor 112 in one-to-one of each forming punch rod, so the configuration is very complicated, and the load that the forming punch having one rod 111 can support is not large. There was a disadvantage that the rod is easily buckled and the thickness of the applicable plate is limited.

Accordingly, the present invention solves the above problems, and as a non-moulded sheet forming apparatus suitable for forming a small number of small plate forms, it is possible to form a plate of various sizes and thicknesses by increasing the load bearing capacity and to efficiently control the forming punches with a simplified configuration. An object of the present invention is to provide a sheet forming apparatus and a sheet forming method using the apparatus.

In the sheet forming apparatus of the present invention for achieving the above object, a plurality of forming punches are arranged up and down, and each forming punch is inserted into and fastened to the punch head, a hollow outer member having an internal thread, and the outer member. At least one inner member having an outer thread, wherein one of the outer member and the inner member is connected to the punch head and the other is connected to the axis of rotation, the one or more being capable of engaging torque with the axis of rotation of each forming punch And a punch adjusting motor.

The plate forming apparatus of the present invention configured as described above, each forming punch is composed of two members fastened with a screw thread can be adjusted in length by the torque provided by the motor can support a large pressure.

Advantageously, said plurality of forming punches are arranged in a plurality of rows and a plurality of columns up and down, said at least one punch adjusting motor being connected to a transverse movement motor or a longitudinal movement motor. In this case, two or more punch control motors may form one module, and the module may be connected to a lateral movement motor or a longitudinal movement motor.

Therefore, it is possible to control a plurality of forming punches by moving a small number of punch adjusting motors by using moving motors without the need for installing a punch adjusting motor in each forming punch. That is, the configuration of the device can be simplified by reducing the number of motors.

A control device is connected to the punch adjusting motor or the moving motor, and may be configured to transmit a rotation speed, punch position information, and the like according to a target shape.

Preferably, the plurality of forming punches arranged up and down is connected to a common support of the upper or lower part, and a bearing may be provided between the supporting part and each rotary shaft, in which case the plurality of forming punches are external to the upper or lower part. It can be installed in the support frame.

Preferably, the punch head has a curved surface that is in contact with the plate material, the side may be formed in a circular or polygonal shape.

Preferably, the punch head may be configured to be detachable and thus replaceable with a new punch head or with a punch head of suitable curvature.

Preferably, the punch head may be provided with a detachable elastic cap, thereby preventing damage and wear of the punch head.

Preferably, the outer member has a circular hollow with an internal thread, and the contour may be formed in a circular or polygonal shape.

In order for one punch control motor to control several forming punches, the punch adjusting motor has to repeat separating and combining with the forming punch. For this operation, one end of the rotating shaft of the forming punch is provided with a locking pin and the punch adjusting is performed. One end of the rotating shaft of the motor may be provided with a locking groove into which the locking pin can be inserted. In this case, when the locking pin is inserted into the locking groove, the rotating shaft of the punch adjusting motor meshes with the rotating shaft of the forming punch to provide torque. can do.

In another embodiment, a convex portion may be provided at one end of the rotary shaft of the punch adjustment motor and a concave portion complementary to the convex portion may be provided at one end of the rotary shaft of the forming punch, in which case the convex portion is inserted into the concave portion. When the rotary shaft of the punch control motor is engaged with the rotary shaft of the forming punch can provide a torque.

In this case, the punch adjustment motor is configured to be able to enter and exit a fixed distance from the fixed housing, one end of the rotary shaft of the punch adjustment motor is provided with an engaging head having a convex portion, and the housing and around the rotary shaft of the punch adjustment motor An elastic spring can be provided between the engagement heads. In this configuration, when the convex portion of the engaging head touches one end of the rotating shaft of the forming punch but is not inserted into the recess, the spring is retracted while the rotating shaft is inserted into the housing, and when the convex portion is fitted to the recess while the rotating shaft rotates. As the spring extends, the rotating shaft may protrude from the housing so that the convex portion may be inserted into the recess.

The convex portion may have various shapes that can be engaged with the concave portion such as a straight shape, a Y shape or a cross shape.

The present invention also relates to a method for molding a plate using the above-described plate forming apparatus, which method,

(a) calculating final length data of each forming punch according to the desired shape of the sheet;

(b) receiving initial length data of each forming punch, comparing the final length data with the final length data, and calculating a rotation speed corresponding to the length adjusting amount of each molding punch;

(c) transmitting a punch signal to the longitudinal movement motor or the lateral movement motor to move the punch adjusting motor to the engagement position with the length adjusting target forming punch;

(d) fastening the punch adjusting motor to the rotating shaft of the forming punch to provide torque according to the number of revolutions calculated for each forming punch;

(e) repeating steps (c) and (d) until the length adjustment of all forming punches is finished;

(f) repeating steps (b) to (e) if there is a difference compared to the final length data by receiving the current length data of each forming punch;

and (g) pressing all the sheet materials with the upper and lower forming punches to form the molds when all the forming punches have a final length.

In addition, the present invention relates to a method for molding a large plate by using the plate forming apparatus described above,

(a) dividing the sheet to be formed into a plurality of sections corresponding to the size of the sheet forming apparatus;

(b) selecting one of the sections and moving the sheet so that the selected section is disposed in the sheet forming apparatus;

(c) calculating final length data of each forming punch according to the target shape of the selected section, and adjusting the length of each forming punch;

(d) forming a selected section of the plate by using a forming punch of which length is adjusted;

(e) re-selecting the molding section of the sheet material and repeating steps (b) to (d).

Preferably, in step (a), the plurality of sections are divided to overlap each other.

The plate forming apparatus of the present invention configured as described above is a die-less plate forming apparatus suitable for forming a small amount of sheet material is composed of a molding punch in which the inner member and the outer member are fastened to greatly increase the load bearing capacity to produce a plate of various sizes and thicknesses. There is an effect that can be stably molded to have a single curvature, a double curvature, a curvature or multiple curvature.

In addition, by controlling a large number of forming punches with a small number of punch adjustment motor, there is an advantage that can be quickly and efficiently rearranged the upper and lower forming punches in a simplified configuration.

Hereinafter, the present invention will be described in more detail with reference to specific embodiments with reference to the accompanying drawings.

3 is a cross-sectional view schematically showing a plate forming apparatus according to an embodiment of the present invention. As shown, in the sheet forming apparatus of the present invention, a plurality of forming punches 1 are arranged vertically with the plate 5 interposed therebetween. 4 is a perspective view of the lower forming punches 1.

In Fig. 5, the forming punch 1 is separated and enlarged. As shown, each forming punch 1 comprises a punch head 3, a hollow outer member 7 and an inner member 9. The inner surface of the outer member 7 is provided with threads (not shown), and the outer surface of the inner member 9 is provided with threads that engage with the threads of the outer member 7. Thus, the inner member 9 can be rotated relative to the outer member 7 to be inserted or discharged into the hollow of the outer member 7. That is, each forming punch (1) is composed of two members fastened with a screw thread is adjustable in length by relative movement can support a large pressure. In the illustrated embodiment, the outer shape of the outer member 7 is formed in a circular shape, but may be formed in a polygon such as a square or an octagon.

In this embodiment, the punch head 3 is connected to one end of the outer member 7, and the rotary shaft 11 is connected to one end of the inner member 9. Alternatively, however, a punch head may be connected to the inner member and a rotation shaft may be connected to the outer member.

The rotary shaft 11 connected to the inner member 9 is engaged with the punch adjustment motor 13 to provide a suitable torque for adjusting the overall length of the forming punch 1 according to the desired shape of the plate.

The punch head 3 is preferably formed in a curved surface such that a surface in contact with the sheet material has a shape of a part of a spherical surface, and the curvature is selected so as not to affect the curvature of the sheet in forming the sheet. In the illustrated embodiment, the outer shape of the punch head 3 is formed in a circular shape, but may be formed in a polygon such as a square or an octagon.

The punch head 3 can be detachably coupled to the end of the outer member 7 by threaded coupling or the like. With this arrangement, it is possible to simply replace the punch head when the punch head 3 is upper limit or when another punch head of suitable curvature is required.

An elastic cap 15 may be provided on a surface of the punch head 3 in contact with the plate member. This elastic cap 15 prevents damage and wear to the punch head due to repeated molding. If no elastic cap is provided, it is desirable to provide an elastic plate between the punch heads and the plate during molding.

The forming punches 1 configured as described above are arranged in a plurality of rows and a plurality of columns, respectively, up and down to form a forming punch set (see FIG. 4), and each of the upper forming punch sets or the lower forming punch sets has a common rotation axis. It is connected to the support 17 of, and a bearing 19 is provided between the support 17 and each rotary shaft 11. Further, the upper shaping punch set or the lower shaping punch set is installed in the outer support frame 21, respectively.

One or more punch adjustment motors 13 are disposed above the punch rotation axes of each forming punch set (under the lower forming punch set, below the punch rotation axes, for convenience, based on the upper forming punch set). One punch adjustment motor 13 may be provided for each forming punch 1 as shown, but by using fewer adjustment motors than the number of punches as follows, the configuration can be simplified and the cost can be reduced.

FIG. 6 shows, in plan view, an embodiment in which a punch adjustment motor is disposed on a forming punch set, wherein four motors 13a, 13b, 13c, 13d arranged in a row in the longitudinal direction of one module 23a. It is formed and connected to the longitudinal movement motor 25, the motor module 23a and the longitudinal movement motor 25 are connected to the lateral movement motor 27 together. As can be clearly seen in the side sectional view of FIG. 7, the four motors 13a, 13b, 13c, 13d constituting one module 23a are integrally moved vertically by the longitudinal movement motor 25, The motor module 23a and the longitudinal movement motor 25 are moved horizontally together by the lateral movement motor 27. That is, in order to control the forming punch set of 12 rows X 16 columns, one module 23a moves vertically in one column to adjust three punches and then moves to the next column to repeat this process. All punches can be adjusted. The longitudinal or lateral movement motors 25 and 27 and the respective punch adjustment motors 13a, 13b, 13c, and 13d are connected to a control device (not shown) to move information and destinations to the adjustment target punch position. Receives information such as motor speed for adjusting punch length according to shape.

That is, without forming the same number of punch adjusting motors for each forming punch, a plurality of punch adjusting motors can be moved by using moving motors to control a plurality of forming punches. In this way, the number of motors can be reduced to simplify the configuration and to efficiently control the length of the forming punches.

8 to 10 show other embodiments of the punch adjustment motor arrangement. In the embodiment of FIG. 8, twelve regulating motors arranged in a row in the longitudinal direction form one module 23b and are connected to the lateral moving motor 27. Therefore, the motors move only horizontally, not vertically, and as shown in the drawing, the module 23b of the punch adjusting motor moves 16 rows horizontally to punch to control a set punch of 12 rows X 16 columns. You can adjust all punches by adjusting.

In the embodiment of FIG. 9, sixteen motors of four rows by four columns form one module 23c and are connected to the longitudinal movement motor 25, and the motor module 23c and the longitudinal movement motor 25 It is connected to the transverse movement motor 27 together. Therefore, in order to control the forming punch set of 12 rows X 16 columns as shown in the drawing, one module 23c can be vertically moved to finish four rows of punch adjustments by adjusting three punches and moving horizontally. By repeating this process four times, you can adjust all 16 rows of punches.

In the embodiment of FIG. 10, there is only one punch adjustment motor 13, which is connected to the longitudinal movement motor 25, and the punch adjustment motor 13 and the longitudinal movement motor 25 are together. It is connected to the lateral movement motor 27. Therefore, in order to control the forming punch set of 12 rows X 16 columns as shown in the drawing, the punch adjustment motor can be moved vertically to adjust each of the 12 forming punches in one row, and by moving to the next row and repeating this process, All punches can be adjusted.

In order to allow one punch control motor to control multiple forming punches, each punch control motor must be repeatedly separated and combined with the forming punch. A detachable engagement configuration is provided at the rotation axis of the forming punch and the connection of the motor. do.

An example of such an engagement configuration is shown in FIG. 11. In the illustrated embodiment, a locking pin 29 is provided at one end of the rotary shaft 11 of the forming punch, and a locking groove 33 into which the locking pin 29 can be inserted at one end of the rotary shaft 31 of the punch control motor. This is provided. That is, when the punch adjusting motor 13 moves in the forming punch direction and the locking pin 29 is inserted into the locking groove 33, the rotational force of the punch adjusting motor 13 is transmitted to the forming punch 1 so that the inner member 9 is removed. Rotate). Then, when the punch adjusting motor 13 moves in the opposite direction to the forming punch and the locking pin 29 is pulled out of the catching groove 33, the engagement is released and the punch adjusting motor 13 cannot rotate the inner member of the forming punch. .

At this time, the locking groove 33 may be formed to be much larger than the thickness of the locking pin 29 so that the locking pin 29 can be easily inserted, the control device is the locking groove 33 to the locking pin 29 It is programmed to detect the time when the torque of the adjusting motor increases due to the engagement pin 29 contacting the side wall of the locking groove 33 through the section that is not idling, and to provide the number of rotations corresponding to the length adjustment amount of the molding punch from this time. Can be. In this way, accurate length adjustment of each shaping | molding punch 1 can be carried out, and a board | plate material can be shape | molded correctly.

12 shows another embodiment of a detachable engagement configuration of the rotary shaft of the forming punch and the connection of the motor. In this embodiment, a convex portion 35 is provided at one end of the rotary shaft 31 of the punch control motor, and a concave portion 37 having a shape complementary to the convex portion 35 is provided at one end of the rotary shaft 11 of the forming punch. Is provided. Thus, when the convex portion 35 of the motor is inserted into the recess 37 of the forming punch, the rotational force of the regulating motor 13 is transmitted to the forming punch 1 to rotate the inner member 9. Then, when the convex portion 35 of the motor is separated from the concave portion 37 of the forming punch, the engagement is released and the punch adjustment motor 13 cannot rotate the inner member of the forming punch.

At this time, the punch adjustment motor 13 is difficult to move so that the convex portion 35 is immediately inserted into the concave portion 37 of the forming punch. Accordingly, as shown in FIG. 13, the rotating shaft 31 is configured to be input and output by a predetermined distance in the housing 39 to which the regulating motor 13 is fixed, and the convex portion 35 is provided at one end of the rotating shaft 31 of the motor. An excitation engagement head 41 is provided, and may be configured such that an elastic spring 43 is provided between the housing 39 and the engagement head 41 around the axis of rotation 31 of the motor. In this configuration, when the convex portion 35 of the engaging head 41 touches one end of the rotating shaft 11 of the forming punch but is not inserted into the recess 37, the rotating shaft of the motor is inserted into the housing and the spring 43 ) Is contracted, and when the engagement head 41 rotates together with the motor rotation shaft 31 and the convex portion 35 is aligned with the concave portion 37, the spring 43 is extended and the rotation shaft 31 is moved to the housing 39. Protruding from the convex portion 35 may be inserted into the concave portion 37. Since the convex portion 35 and the concave portion 37 have a complementary shape, the rotational force of the regulating motor 13 can be directly transmitted to the inner member 9 of the forming punch.

In the embodiment of FIGS. 12 and 13, the convex portion 35 has a straight shape, but as a modification, it may have a Y shape as shown in FIG. 14, may have a cross shape as shown in FIG. 15, and another shape. May have In this case, the concave portion 37 preferably has a shape corresponding to the convex portion 35.

The method of forming a plate using the plate forming apparatus configured as described above is as follows.

First, final length data which each molding punch 1 should have according to the objective shape of a board | plate material is calculated. Then, the initial length data, which is the current length of each forming punch 1, is input and compared with the final length data to calculate the required length adjustment amount. And the rotation speed which the inner member 9 should rotate is calculated corresponding to the required length adjustment amount of each shaping | molding punch 1.

The movement signal is transmitted to the longitudinal movement motor 25 or the lateral movement motor 27 to move the punch adjustment motor 13 to the engagement position with the shaping punch 1 to be adjusted in length. Then, the punch adjustment motor 13 is operated to fasten the punch adjustment motor 13 to the rotating shaft 11 of the molding punch to provide torque according to the rotation speed calculated for each molding punch 1.

The process of adjusting the molding punch 1 is repeated by moving the punch adjusting motor 13 until the length adjustment of all molding punches is completed.

After adjusting the length of all molding punches, the length data is input after adjustment of each molding punch and compared with the final length data to check whether there is a difference. If there is a difference, the molding punch is readjusted starting from the step of calculating the length adjustment amount of each molding punch.

If all forming punches have the required final length, they are molded by pressing the plate with a set of upper and lower forming punches.

In addition, when molding a large plate, in particular a plate larger than the molding apparatus using the plate forming apparatus of the present invention can be formed by dividing the plate into a plurality of sections as shown in FIG.

Specifically, first, the molding target plate 5 is divided into a plurality of sections 45 corresponding to the size of the sheet forming apparatus. In this case, it is preferable to divide the plurality of sections so as to overlap each other with a predetermined portion. One of the divided sections is selected, and the plate is moved so that the selected section is disposed in the sheet forming apparatus. Thereafter, the final length data of each forming punch is calculated according to the target shape of the selected section, and the length of each forming punch 1 is adjusted by the punch adjusting motor 13. Then, the selected section of the plate member 5 is molded by the upper and lower forming punches whose length is adjusted.

Until the molding of the entire plate is finished, the forming section of the plate is reselected and moved to the plate forming apparatus, and the length of each punch is adjusted and molded according to the desired shape of the selection section.

1 is a cross-sectional view schematically showing a plate forming apparatus using a conventional mold,

Figure 2 is a cross-sectional view schematically showing a conventional moldless plate forming apparatus,

3 is a cross-sectional view schematically showing a plate forming apparatus according to an embodiment of the present invention,

4 is a perspective view of the lower forming punch set of the plate forming apparatus of FIG.

5 is an enlarged cross-sectional view of a forming punch of the sheet metal forming apparatus of FIG. 3;

Figure 6 is a plan view showing an embodiment of the punch adjustment motor arrangement of the sheet metal forming apparatus according to the present invention,

7 is a side view of the punch adjustment motor arrangement of FIG. 6;

8 to 10 are plan views of modified embodiments of the punch control motor arrangement of the sheet metal forming apparatus according to the present invention,

11 is a perspective view schematically showing an embodiment of a connection portion between a rotating shaft of a forming punch and a rotating shaft of a motor;

12 is a perspective view schematically showing another embodiment of the connecting portion of FIG. 11;

13 is a cross-sectional view showing in more detail the embodiment of FIG.

14 and 15 are a perspective view schematically showing a variant embodiment of the connecting portion of FIG.

FIG. 16 is a diagram schematically showing a divided molding method of a large plate using the sheet metal forming apparatus of the present invention. FIG.

Claims (17)

In a plate forming apparatus in which a plurality of forming punches are arranged up and down, Each forming punch includes a punch head, a hollow outer member having an inner thread, and an inner member having an outer thread inserted into and fastened to the outer member, one of the outer member and the inner member connected to the punch head. The other is connected to the axis of rotation, One or more punch adjustment motors capable of providing torque in engagement with the rotational axis of each forming punch, A locking pin is provided at one end of the rotating shaft of the forming punch and a locking groove into which the locking pin can be inserted is provided at one end of the rotating shaft of the punch adjusting motor, so that the punch adjusting motor is inserted when the locking pin is inserted into the locking groove. The rotating shaft of the sheet forming apparatus, characterized in that for engaging the rotary shaft of the forming punch to provide torque. The method of claim 1, And said plurality of forming punches are arranged in a plurality of rows and a plurality of columns up and down, said at least one punch adjusting motor being connected to a transverse movement motor or a longitudinal movement motor. The method according to claim 1 or 2, At least two punch control motors forming one module, and the module is connected to a lateral movement motor or a longitudinal movement motor. The method of claim 2, Plate punching apparatus, characterized in that the control device is connected to the punch control motor or the moving motor. The method according to claim 1 or 2, A plurality of forming punches arranged up and down are connected to a common support part of the upper or lower part, and a bearing is provided between the support part and each rotation shaft. The method according to claim 1 or 2, A plurality of forming punches arranged up and down is installed in the outer support frame of the upper or lower portion. The method according to claim 1 or 2, The punch head is a plate forming apparatus, characterized in that the surface in contact with the plate is formed in a curved surface, the side is formed in a circular or polygonal. The method according to claim 1 or 2, The punch head is removable plate forming apparatus, characterized in that. The method according to claim 1 or 2, The punch head is a plate forming apparatus characterized in that it comprises a removable elastic cap. The method according to claim 1 or 2, The outer member has a circular hollow with an internal thread, the outer shape is formed in a circular or polygonal sheet forming apparatus, characterized in that. As a method of forming a plate using the plate forming apparatus of claim 1, (a) calculating final length data of each forming punch according to the desired shape of the sheet; (b) receiving initial length data of each forming punch, comparing the final length data with the final length data, and calculating a rotation speed corresponding to the length adjusting amount of each molding punch; (c) transmitting a movement signal to the longitudinal movement motor or the lateral movement motor to move the punch adjustment motor to the engagement position with the adjustment target forming punch; (d) fastening the punch adjusting motor to the rotating shaft of the forming punch to provide torque according to the number of revolutions calculated for each forming punch; (e) repeating steps (c) and (d) until the length adjustment of all forming punches is finished; (f) repeating steps (b) to (e) if there is a difference compared to the final length data by receiving the length data after adjustment of each forming punch; and (g) pressing all the forming members to form the upper and lower forming punches when all the forming punches have a final length. In the method of forming a large plate using the plate forming apparatus of claim 1, (a) dividing the sheet to be formed into a plurality of sections corresponding to the size of the sheet forming apparatus; (b) selecting one of the sections and moving the sheet so that the selected section is disposed in the sheet forming apparatus; (c) calculating final length data of each forming punch according to the target shape of the selected section, and adjusting the length of each forming punch; (d) forming a selected section of the plate by using a forming punch of which length is adjusted; (e) re-selecting the molding section of the sheet and repeating steps (b) to (d). The method of claim 12, In the step (a), a plurality of sections are divided into plate forming method characterized in that to overlap each other. delete delete delete delete

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