JPH07106390B2 - Cold roll forming machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a cold roll forming machine, and more particularly to a cold roll forming machine that facilitates correction of warpage, bending, and twist of a formed material.

[Prior Art] In general, a cold roll forming machine has a plurality of stages of roll stands arranged in tandem, and both left and right sides of a roll shaft incorporating a forming roll can be freely rotated by a chock (bearing box) attached to the roll stand. And a driving device drives one end side of the roll shaft to rotationally drive the forming roll. The strip-shaped metal plate material is sequentially bent by the forming roll to be formed into a predetermined shape.

In the conventional cold roll forming machine, the lower chock is not structured to move up and down, but the left and right upper chocks are moved up and down by the screw down screws attached to the left and right stand caps. This is a structure in which the shaft is moved up and down to adjust the roll pressure (or the distance between the upper and lower roll axes).

In a normal molding machine, the vertical movement of the upper chock has a structure in which the screw is manually turned, but in a large molding machine, it may be driven by a motor. However, the conventional structure has a structure in which one motor is used as a drive source to rotationally drive the left and right screw down screws to simultaneously move the left and right chocks up and down.

By the way, when passing the plate material through the forming roll and forming it,
Usually, the molded material is warped, bent, twisted, etc.,
Although it is necessary to correct the warp or the like, a method using a turks head as shown in FIG. 5 is generally adopted as a method of correcting the warp. This turks head is arranged after the final roll stand, and holds the molding material 6 by the free-running turks head rolls 2, 3, 4, 5 attached to the movable face plate 1, and moves the face plate 1 vertically, horizontally and in the rotating direction. To correct warping, bending, and twisting of the molding material.

In addition, as shown in FIG.
There is also a method of straightening by moving the entire roll stand up and down and changing the height of the pass line. For example, in the case of downward warp, the roll stand for adjustment is raised with respect to the front and rear roll stands, and in the case of upward warp, it is lowered with respect to the front and rear roll stands.

[Problems to be Solved by the Invention] Straightening performed by simply holding a molding material with a turks head roll like the above turks head does not necessarily provide a sufficiently large straightening effect. Especially when the plate thickness becomes thick, the straightening is not easy.

Further, the method by changing the pass line can improve the large correction effect with a small displacement amount, but can only correct the warp. In addition, one roll stand whole up and down,
It may be possible to adjust the movement in the left and right directions and the rotation direction, but since the roll pressure reduction cannot be adjusted by the movement adjustment of the roll stand itself, accurate correction is not easy.
In addition, the structure is remarkably large.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cold roll forming machine capable of effectively and accurately correcting warpage, bending, and twist of a formed material.

[Means for Solving the Problems] In the present invention for solving the above problems, a plurality of stages of roll stands are arranged in tandem, and a pair of upper and lower horizontal forming rolls provided in each roll stand is used to bend and form a strip-shaped metal plate material. In a cold roll forming machine that performs the above, left and right upper chocks that support the left and right parts of the upper roll shaft that holds the upper forming roll, and left and right lower chocks that support the left and right parts of the lower roll shaft that holds the lower forming roll, respectively. The cold roll forming machine is characterized in that one or two or more roll stands are provided with a chock lifting drive device for individually lifting and lowering the four chocks.

According to a second aspect of the present invention, in the cold roll forming machine according to the first aspect, a lateral drive device that drives a roll stand provided with a chock lifting drive device in the roll width direction is provided.

[Operation] In the above-mentioned configuration, the four chock raising / lowering drive devices for the upper, lower, left and right are individually actuated to individually raise and lower the four chocks for the upper, lower, left and right, thereby changing the pass line height of the roll stand portion. can do. Also,
The amount of roll reduction (or the distance between the roll axes) can be adjusted, and the amount of reduction can be adjusted individually at the left and right positions of the forming roll. Further, the inclination of the upper and lower roll shafts can be adjusted, although slightly, and the same effect as when the entire roll stand is rotated can be obtained.

In the structure of the second aspect, the roll drive and the forming roll can be moved and adjusted in the roll width direction by the lateral drive device.

As described above, the molding material can be displaced in the up-down direction, the left-right direction, and the rotation direction while adjusting the amount of reduction of the molding material and individually adjusting the roll position at the left and right positions. Therefore, it is possible to effectively correct warpage, lateral bending, and twist of the molded material.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 4 is a side view showing a roll stand arrangement of a cold roll forming machine according to an embodiment of the present invention. Reference numeral 11 is a pinch roll stand for feeding and driving a metal plate material, and reference numeral 12 is a plate material formed by upper and lower forming rolls 13 and 14. Is a roll stand for performing bending forming, in this embodiment, the roll stand 12A of the present invention having a function of correcting warpage, lateral bending, twisting and the like of the molding material 15 is arranged in the preceding stage of the final stage roll stand. ing. In this embodiment, a turks head 16 having a structure as shown in FIG. 5 of the conventional example is further arranged in front of the final roll stand.

The details of the roll stand 12A will be described with reference to FIGS. 1 to 3. Bearings 18 are built in the left and right journals of an upper roll shaft 17 incorporating an upper forming roll (hereinafter referred to as an upper roll) 13. Upper chocks 19 are attached, and a screw 21 is rotatably attached to an upper portion of each upper chocks 19 via an attaching member 20.
In this embodiment, a load cell 22 for measuring the reduction load is arranged immediately below the reduction screw 21.
A stand cap 23 is attached to the upper part of the roll stand 12A. This stand cap 23 allows a shaft 24 fixed vertically to be inserted into the upper part of the roll stand 12A, and the shaft 24
The cotter pin 25 is inserted into the cotter hole 24a opened in the above and is fixed to the roll stand 12A. A worm wheel 26 that is screwed onto the reduction screw 21 is attached to the stand cap 23 via a thrust bearing 27, 28 so as to be rotatable only. Reference numeral 29 is a bearing nut that fixes the upper thrust bearing 27. A motor 30 for lifting and lowering the chock is attached to the stand cap 23, and a worm 31 that meshes with the worm wheel 26 is fixed to an output shaft 30a of the motor 30. Incidentally, reference numeral 32 is a reduction screw protection cap for protecting the screw portion of the reduction screw 21.

Further, a lower chock 34 having a built-in bearing 35 is attached to the left and right journals of a lower roll shaft 33 in which a lower forming roll (hereinafter, referred to as a lower roll) 14 is incorporated, and the lower part of the roll stand 12A is perpendicular to the axis. Worm wheel 36 is attached through the thrust bearing 37, and the lower chock is attached to the screw hole formed at the center of the worm wheel 36.
A reduction screw 38 that supports 34 is screwed. Also,
A motor 39 for driving the lower chock up and down is installed below the roll stand 12A, and a worm 40 that meshes with the worm wheel 36 is fixed to an output shaft 39a of the motor 39.

The drive sides of the upper and lower roll shafts 17, 33 are connected to an output shaft of a speed reducer 42 of the drive device via a universal joint 41. Reference numeral 43 indicates the upper and lower roll shafts 1
These are roll nuts for tightening and fixing the rolls 13 and 14 incorporated in the 7, 33, respectively.

The left and right roll stands 12A are connected by a connecting rod 44, and a cylindrical female screw block 45 having a screw hole is fixed to the lower portion of the drive side roll stand 12A as shown in FIG. A horizontal drive screw 46, which is screwed into the screw hole of the block 45, is horizontally and rotatably supported by bearing bases 47 and 48, and the horizontal drive screw 46 is wound around the sprockets 50 and 51 by a horizontal drive motor 49. It is adapted to be rotationally driven via a chain 52. The lateral drive motor 49, the chain 52, and the lateral drive screw.
Roll stand 12A for 46, female screw block 45, connecting rod 44, etc.
A lateral drive device 53 is configured to move and adjust the roll width direction (left and right direction in FIG. 1).

The upper and lower chock lifting motors 30 and 39 and the lateral driving motor 49 are both structured such that the amount of rotation is digitally controlled, and the upper and lower chock 19 and lower chock 34 are lifted and lowered on the display of the operation panel. Alternatively, the lateral movement amount of the roll stand 12A is displayed.

In the roll stand 12A, when the motor 30 for driving the upper chock up and down is operated, the worm wheel 26 is rotationally driven via the worm 31, and the screw down screw 21 screwed with the worm wheel 26 is vertically driven. The chock 19 is driven up and down. The left and right upper chocks 19 can be individually driven up and down, and the upper roll shaft 17 is driven up and down.

Similarly, when the motor 39 for driving the lower chock is driven, the worm wheel 36 is rotationally driven via the worm 40, and the lower screw 38 that is screwed into the worm wheel 26 is vertically moved. The lower chock 34 moves up and down in response to the up and down movement of 38. Thus, the left and right lower chocks 34 are individually moved up and down, and the lower roll shaft 33 is driven up and down.

When the lateral drive motor 49 is operated to rotate the lateral drive screw 46, the lateral drive screw 46 is rotated.
The left and right roll stands 12A connected by the female screw block 45 to which 46 is screwed and the connecting rod 44 are integrally driven in the roll width direction.

The roll stand 12A is operated as follows when correcting the warp, lateral bending, and twist of the molding material.

When the molding material is warped or warped, the left and right upper chocks 19 are evenly raised or lowered, and at the same time, the left and right lower chocks 34 are raised or lowered by following the same amount.
Thereby, the height of the pass line of the roll stand 12A can be raised or lowered, and the warp can be corrected.

In addition, adjustment of the roll reduction amount is also effective for correcting warpage and lateral bending. For example, in the case of warp, if the roll pressure is increased, the roll will often be straightened. Further, in the case of lateral bending, it is often possible to correct the lateral bending by adjusting the left and right chocks 19 and 34 individually and adjusting the balance between the left and right roll pressures of the forming roll.

Further, in order to correct the lateral bending of the molding material, the lateral driving device 51 can be used to move and adjust the entire roll stand 12A in the roll width direction to effectively correct the lateral bending.

In addition, in order to correct the twist of the molding material, the tilt of the upper and lower roll shafts 17 and 33 can be adjusted to a slight extent by moving and adjusting the upper and lower chocks 19 and 34 on the right or left side. The same effect as when the entire 12A is rotated is obtained, and the effect of correcting the twist is obtained.

Since each of the above-mentioned straightening actions is performed in the roll stand that is pressing down the molding material, a large straightening effect can be obtained with a smaller displacement amount as compared with the straightening performed by the turquoise roll that simply holds the molding material.

In the embodiment, a turks head is also installed, and if necessary, or in combination with the roll stand 12A, it is possible to perform correction, but the turks head does not necessarily have to be installed. Good.

Further, the roll stand 12A of the embodiment is arranged in the front stage of the final stand, but it may be arranged as the final stand when the roll stand of the front stage or the turks head is further installed. In short, it may be near the final roll stand.

Further, the roll stand 12A of the present invention is not limited to one stage, and it is conceivable to install two or more stages.

[Effects of the Invention] Since the present invention is configured as described above, the following effects are achieved.

Not only the upper roll shaft but also the lower roll shaft can be adjusted in height, so change the pass line of one roll stand near the final roll stand.
The warp of the molding material can be effectively corrected.

Since the upper and lower and right and left four chocks can be individually adjusted to move up and down, the amount of reduction at the left and right positions of the forming roll can be individually adjusted, and lateral bending can be effectively corrected. This is particularly effective in the case of forming an asymmetrical cross section.

The inclination of the upper and lower roll shafts can be adjusted, albeit slightly, so that the same effect as when the entire roll stand is rotated can be obtained. Is also effective.

When the lateral drive device for moving and adjusting the roll stand in the roll width direction is provided, lateral bending can be corrected particularly effectively.

As described above, the present invention adjusts the amount of reduction of the molding material,
Moreover, the molding material can be displaced in the up-down direction, the left-right direction, and the rotation direction while being adjusted individually at the left and right positions of the roll, so that the molding material can be effectively corrected for warpage, lateral bending, and twist. You can

[Brief description of drawings]

FIG. 1 shows a cold roll forming machine 1 according to an embodiment of the present invention.
FIG. 2 is a partial cross-sectional view of one roll stand, FIG. 2 is a side view of the same in partial cross section, FIG. FIG. 5 is a schematic side view showing a roll stand arrangement of a roll forming machine, FIG. 5 is a schematic explanatory view of a turks head which is a conventional straightening device, and FIG. 6 is an explanatory view of another example of a conventional straightening method. 13 …… Upper roll, 14 …… Lower roll, 17 …… Upper roll shaft, 19 …… Upper chock, 20 …… Mounting member, 21 …… Screw down screw, 23 …… Stand cap,
26 …… worm wheel, 30 …… upper chock lifting drive motor (chock lifting drive), 31 …… worm,
33 …… Lower roll shaft, 34 …… Lower chock, 36 …… Worm wheel, 38 …… Reduction screw, 39 …… Motor for lower chock lifting drive (chock lifting drive), 40
...... Worm, 44 ...... Connecting rod, 45 ...... Female thread block,
46 …… Lateral drive screw, 49 …… Lateral drive motor, 53
…… Lateral drive.

Claims (2)

[Claims] 1. A cold roll forming machine in which a plurality of stages of roll stands are arranged in tandem, and a pair of upper and lower horizontal forming rolls provided on each roll stand bend-forms a strip-shaped metal plate material. The left and right upper chocks that support the left and right parts of the upper roll shaft that holds them, and the left and right lower chocks that support the left and right parts of the lower roll shaft that holds the lower forming rolls. A cold roll forming machine characterized in that one or more roll stands are provided with a driving device. 2. The cold roll forming machine according to claim 1, further comprising a lateral drive device for driving the roll stand in the roll width direction.