JP2691819B2 - Roll forming machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a flange portion bent on both sides of a horizontal web portion such as a grooved steel with a lip from a metal strip, and a lip portion bent further on both sides thereof. The present invention relates to a roll forming machine suitable for forming a cross-sectional shape of a roll.

[0002]

2. Description of the Related Art In a roll forming machine, there is a strong demand for efficient roll rearrangement accompanying a change in forming type. As shown in FIG. 12, as a roll forming machine capable of efficiently performing roll rearrangement, as shown in FIG. 12, a forming unit 3 including a plurality of (but not explicitly shown) roll stands 1 installed on a sole plate 2 is a forming machine bed. There is known a roll forming machine which is detachably mounted on the roll 4. The roll stand 1 supports both sides of a roll shaft 6 incorporating a forming roll 5. Reference numeral 7 is a drive unit that drives the roll shaft 6, and is connected to an input shaft on the roll stand 1 side via a coupling 8. Usually, on one sole plate 2, the number of roll stands 1 is the total number of stages of the forming stand, or half or one-third thereof.
Is installed. In this sole plate type roll forming machine, when the rolls are rearranged in accordance with the change in product size, the roll stand 1 is arranged for each sole plate 2 (that is, for each forming unit 3) as shown in the drawing.
The roll stand 1 in which the roll is set to the next product size is hung by the crane 9 together with the sole plate 2 and transported, and installed on the molding machine bed 4.

[0003]

In the conventional sole plate type roll forming machine described above, since a plurality of roll stands 1 are replaced together with the sole plate 2, compared to a method in which only the roll and the roll shaft are removed from the roll stand. Although it is efficient, it is still necessary to carry out a roll precombination according to the size of the product to be molded next, and the work of transporting the plurality of roll stands 1 together with the sole plates 2 by a crane is not always easy. Further, both the space for placing the molding unit 3 that has undergone the preliminary roll rearrangement and the space for placing the molding unit 3 that has been removed from the molding machine are required, and there is also a problem that a wide space for recombining the roll is required. is there.

The present invention has been made in view of the above circumstances, and when mainly forming a product having a cross-sectional shape such as a grooved steel with a lip, it is possible to extremely efficiently perform roll rearrangement accompanying a change in product size. It is an object of the present invention to provide a roll forming machine that is capable of operating a crane and does not require a large space for changing rolls.

[0005]

SUMMARY OF THE INVENTION A roll forming machine according to the present invention for solving the above-mentioned problems is a free-running abutting roller that contacts an inner rounded portion of a corner portion and an outer side of two sides sandwiching the corner portion in the vicinity of the corner portion. In the roller die face plate unit having two idle receiving rollers that come into contact with the side surfaces, the plate material is bent and formed by the abutting roller and the receiving roll, and the plate material feed drive is dedicated to the feed drive. What is claimed is: 1. A roll forming machine for forming a cross-sectional shape having a bent flange portion on both sides of a horizontal web portion and further bent lip portions on both sides by a roller die forming method using rolls, And a flange forming zone for bending and forming the flange portion on the downstream side of the lip forming zone. The lip forming zone includes a roller die face plate unit for each product size, which is capable of moving and adjusting the abutting roller and two receiving rollers facing the abutting roller according to the product size. The molding zone is equipped with three dedicated roller die face plate units for three product sizes in parallel so as to form three rows of a central row and left and right rows, and the entire roller die face plate unit group is integrated into the left and right sides. It is characterized by being equipped so that it can be moved to.

[0006]

In the above roll forming machine, the feeding of the plate material is performed by the roll dedicated to the feeding drive which does not bend the plate material.
The lip portion is formed by the plate material passing between the abutting roller and the two receiving rollers facing the abutting roller in the roller die face plate unit in the lip forming zone. The flange part is formed by passing between the abutting roller and the two receiving rollers facing the roller die face plate unit located on the center line of the molding machine of the roller die face plate unit line of three rows. It is done by doing.

When the product size is changed, in the lip forming zone, the abutting roller on the roller die forming face plate and the two receiving rollers facing each other are moved and adjusted to correspond to the product size. On the other hand, in the flanging zone,
By moving the roller die face plate unit group consisting of three rows and plural stages of roller die face plate units as a whole to the right or left, the roller die face plate unit column corresponding to the desired product size is aligned with the molding machine center line. In each roller die face plate unit in the flange forming zone, the abutting roller and the two receiving rollers facing it have already corresponded to the product size, respectively. Roll replacement is completed with.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the embodiment, as shown in FIG. 8, a grooved steel 20 with a lip having a horizontal web portion 20a and a flange portion 20b and a lip portion 20c on both sides thereof is formed. 1 is a schematic overall plan view of a roll forming machine showing an embodiment of the present invention, and FIG. 2 is a schematic side view thereof. On the molding machine bed 21, an entrance guide 22 for guiding the right and left edges of the plate material 20 (the material, the material in the middle of molding, and the final shape product are also denoted by reference numeral 20), and upper and lower cylinders for only feeding drive of the plate material First pinch roll 23 by roll
(Note that the reference numerals in the drawings indicate the pinch roll itself and the pinch roll stand without distinction), the lip forming zone 24 for bending the lip portion 20c,
A second pinch roll 25 that feeds and drives the plate material 20 in which only the lip portion 20c is formed, a flange forming zone 26 in which the flange portion 20b is formed after the lip portion 20c is formed, and a final shape of the groove section with a lip is formed. The third pinch roll 27 and the fourth pinch roll 28 for feeding and driving the plate material (product 20) formed in the above.

The flange forming zone 26 is provided with a roller die face plate unit 31 dedicated to a product size of channel steel with a lip, for example, C100 × 50 × 20, and C75 × 45.
Roller die face plate unit 32 dedicated to × 15, C6
Roller die face plate unit 33 dedicated to 0x30x10
And 3 types of roller die face plate units are arranged in parallel so as to form three rows of a central row and left and right rows. The illustrated flange forming zone 26 is a seven-stage type. That is, each of the three roller die face plate unit rows is 7 in the tandem direction.
Equipped with two roller die face plate units. The three rows of roller die face plate units 31, 32, 33 are
An upper frame member 34 extending in the feeding direction, a lower frame member 35, and a base member 3 integrally connecting the lower frame member 35 in the width direction of the molding machine.
Movable frame 3 composed of 6 and movable in the width direction of the molding machine
7 is fixed to the upper frame member 34 and the lower frame member 35. On the other hand, a rail 38 extending in the width direction of the molding machine is fixed to the upper side of the molding machine bed 21, and a guide portion 39 fitted and guided by the rail 38 is fixed to the lower surface of the base member 36 of the movable frame 37. In this way, the movable frame 37 in which the roller die face plate units 31, 32, 33 of three rows and seven stages are integrally fixed is movable along the rail 38 in the width direction of the molding machine. Reference numeral 40 is a stopper that defines the movement limit of the movable frame 37 and performs positioning. Further, an air cylinder 42 is provided on the molding machine bed 21 as a driving device for driving the movable frame 37 in the width direction of the molding machine.
The tip of the cylinder rod 42a is connected to a bracket 43 fixed to the bottom surface of the movable frame 37.

The roller die face plate units 31, 3
2 and 33 will be described in detail, as shown in FIG. 5 and FIG. 6, the face plates 31a, 32a, 33a of the roller die face plate units 31, 32, 33 are attached to the inner rounded portions of the plate member 20 in a free rotation. An abutting roller 51, a base roller (receiving roller) 52 that is also in the vicinity of the corner portion and is in contact with the outer surface of the web portion 20a, and a similarly rotating base roller (receiving roller) 52 that is in the vicinity of the corner portion and is in contact with the outer surface of the flange portion 20b. A pair of left and right side rollers (receiving rollers) 53 are attached respectively. Face plates 31a, 32
a, 33a, holes 31b, 32b, 33b through which the plate material passes
Has been opened. Reference numeral 55 is the abutting roller 51.
It is an abutting roller holder that supports the shaft 51a. The abutting roller holder 51 includes face plates 31a, 32a,
A block 59 fixed to 33a is supported rotatably in a substantially vertical direction via a pin 56, and a shaft 57 is provided between the upper portion of the abutting roller 55 and the face plates 31a, 32a, 33a.
The Belleville spring 58 fitted to the above is interposed. Due to the existence of the disc spring 58, even if the plate thickness of the plate material to be molded is changed, it is possible to perform the displacement corresponding to the increase / decrease of the plate thickness while applying the necessary rolling force, so that it is not necessary to perform the plate thickness adjustment such as liner adjustment.
The plate thickness can be automatically adjusted. Reference numeral 60 is a base roller holder that supports the shaft 52a of the base roller 52. Reference numeral 61 is a shaft 53a of the side roller 53.
Is a side roller holder that supports the. The base roller holder 60 and the side roller holder 61 are fixed to the face plates 31a, 32a, 33a by bolts 62, 63, respectively. Abutting roller 51, base roller 5
2. Since the side roller 53 is peculiar to a specific product size, it is not necessary to make a large movement adjustment.
It is good to be able to make fine adjustments. The reference numeral 64
Is a rib plate for reinforcing the face plates 31a, 32a, 33a.

The lip forming zone 24 adopts the roller die forming method similarly to the flange forming zone 26. However, in the lip forming zone 24, one type of roller die face plate unit 70 commonly used for each product size is used. I have it. In the illustrated example, a six-stage type, that is, six roller die face plate units are provided in the tandem direction. As shown in FIG. 7, each roller die face plate unit 70 has a main face plate 71 fixed on a base 68 fixed to the molding machine bed 21 and an upper part thereof connected by an upper frame member 69, and a horizontal face on the main face plate 71. The left and right sub-face plates 73 slidably provided in the width direction of the molding machine along the guide 72.
3 includes an abutting roller 81, a base roller 52, a side roller 53, an abutting roller 81, a base roller (receiving roller) 82, and a side roller (receiving roller) 83, respectively, in the flange forming zone 26. It is provided. However, in order to be used for three product sizes, the female screw block 76 is fixed to each of the left and right sub-face plates 73, and the female screw block 76 has the right screw portion 75a and the left screw portion 75b on the left and right portions, respectively. Main plate 7
It is screwed into an adjusting screw 75 provided rotatably only on a bearing portion 74 provided on the first side. By turning the adjusting screw 75, the left and right female screw blocks 76 and the left and right sub-face plates 73 integral with this are provided. Is configured to move left and right. Further, reference numeral 85 indicates the shaft 8 of the butting roller 81.
The abutting roller holder that supports 1a, reference numeral 86 is a side roller holder that supports the shaft 83a of the side roller 83, and is fixed to the sub-face plate 73. The shaft 82 a of the base roller 82 is supported by the female screw block 76. In addition, the main face plate 71 has holes 7 through which the plate material passes.
1a is opened, and the sub-face plate 73 is provided with a notch for passing the plate material.

In the above roll forming machine, the feeding of the plate material 20 is performed by the first pinch roll 23, the second pinch roll 25, the third pinch roll 27 and the fourth pinch roll 28. The lip portion 20c is formed in the lip forming zone 24 by the six-stage roller die face plate unit 70. That is, the plate member 20 is the abutting roller 8 in the roller die face plate unit 70.
By passing between 1 and the base roller 82 and the side roller 83 which oppose this, the corner part is gradually deeply bent. In addition, the flange portion 20b is molded by 3
It is performed by a specific roller die face plate unit arranged on the center line of the molding machine in the row of roller die face plate units 31, 32, 33. The bending and forming itself in the roller die face plate unit is performed by the plate material 20 passing between the abutting roller 51 and the base roller 52 and the side roller 53 facing the abutting roller 51, as in the case of the lip forming zone 24. .

When the product size is changed, in the lip forming zone 24, the screw 75 is turned, and the female screw block 76 screwed to the adjusting screw 75 and the left and right sub-face plates 73 integrated with the female screw block 76 are symmetrically moved left and right. Adjustment so that the abutting roller 81 and the base roller 82
And the side roller 83 are moved to predetermined positions corresponding to the left and right bending positions.

On the other hand, in the flange forming zone 26, the group of roller die face plate units 31, 32, 33 of three rows and seven stages is moved to the right or left as a whole, so that the roller die face plate unit row corresponding to the desired product size can be obtained. To the molding machine center line. In the flange forming zone, the abutting roller 51, the base roller 52, the side roller 53 on the roller die face plate units 31, 32, 33 have already been formed.
Since each corresponds to the product size correctly, the above-mentioned roller die face plate units 31, 32,
The roll rearrangement is completed only by moving the entire 33 group.

Further, when the product size is the same and only the plate thickness is changed, in the lip forming zone 24 and the flange forming zone 26, the abutting roller 51 or 81 gives a necessary rolling force by the elastic displacement of the disc spring 58. Automatically respond to plate thickness changes. Also, each pinch roll 23,
Also for 25, 27, and 28, by arranging the disc springs in the portions that receive the pressing force of the upper roll, the adjustment work when changing the plate thickness becomes unnecessary. Pinch rolls 23, 25,
8 to FIG. 1 showing a specific embodiment in the case of arranging in 27 and 28.
0 will be described.

FIG. 8 is an enlarged view of a part of the upper portion of the pinch roll stand, which is partially cut away. Reference numeral 101 is a roll stand, 102 is an upper roll shaft to which an upper pinch roll 103 is attached, and 104 is an upper roll shaft 102. Upper chock (bearing box), 105 is roll nut,
Reference numeral 106 is a lower pinch roll, and 107 is a stand cap. Nut 1 welded to the stand cap 107
The screw part 1 of the pressing shaft 109 having the screw part 109a at 08
09a is screwed together. The pressing shaft 109 has a collar 109b at the lower end. A disc spring case 120 including a disc spring case body 110 and a pressing lid portion 111 is fixed to the upper surface of the upper chock 104 with bolts 112. The disc spring case body 110 has a cylindrical hole 110a and a large-diameter cylindrical space 110b. For example, eight disc springs 116 are arranged in this void 110b. The shaft portion 115a of the headed guide shaft 115 is fitted in the hole of the disc spring 116 and slidably fitted in the hole 110a of the disc spring case body 110. The load cell 117 is accommodated in a recess provided on the upper surface side of the head 115b of the headed guide shaft 115. The pressing lid portion 111 has a shaft hole 111b at the center.
An intermediate shaft 118, which is fixed to the portion 11b, is arranged slidably in the vertical direction, and a flange portion 109b at the lower end of the pressing shaft 109 contacts the upper surface of the intermediate shaft 118.

When the plate member 20 is passed through the pinch roll, the rolling force (rolling load) of the upper roll 103 is reduced by the disc spring 1.
It is transmitted to the pressing shaft 109 via 16. Nut 10
Since the holding shaft 109 screwed to 8 is fixedly held by the stand cap 107, the upper roll 103
The 8 plate springs 116 receive the rolling force of. Therefore, even if the thickness of the plate material 20 to be threaded is changed,
The disc spring 116 can automatically adjust to the plate thickness while applying a necessary rolling force due to its elastic displacement.

The first to fourth pinch rolls 23, 25,
The spring repulsive force of the disc springs 116 used for 27 and 28 may be set experimentally. FIG. 10 shows the same product size with plate thicknesses of 1.6 mm, 2.3 mm and 3.2 m, respectively.
When m, it is checked how much rolling force each of the first pinch roll 23, the second pinch roll 25, the third pinch roll 27, and the fourth pinch roll 28 can pass. The experimental results are shown in a graph.
The horizontal axis is the plate thickness, and the vertical axis is the rolling force (rolling load) of each pinch roll. Here, the reduction force required for the first pinch roll 23 is a reduction force that generates a feed drive force that allows the first pinch roll 23 to feed the tip of the plate material to the second pinch roll 25. . The reduction force required for the second pinch roll 25 is the first pinch roll 2
Under the condition that the feed drive force (the feed drive force when the necessary reduction force that was experimentally obtained previously is set) is given in step 3, the plate material is moved to the third pinch roll in the second pinch roll 25. It is a pressing force that generates a feed driving force that can feed the roll 27. 3rd and 4th pinch rolls 2
The reduction force required for 7, 28 means that after the rear end of the plate material has passed through the second pinch roll 25, the third, fourth pinch roll 2
7 and 28 is a pressing force for generating a feed driving force capable of feeding a plate material. Numerical values of the rolling force shown in FIG. 8 (1425 Kg, 1825 Kg, 2325 Kg, etc.)
Is the average value of the loads acting on each chock on the driving side and working side. Each pinch roll 23,2
Displacement at 5, 27 and 28 (corresponding to plate thickness)
If the disc springs 116 having the same characteristics (characteristics of one disc spring and the number of used discs) as shown in FIG. 10 between the spring repulsive force (corresponding to the rolling force) and the plate thickness are changed as described above. Respond automatically.

In the above-mentioned roll forming machine, in the flange forming zone 26, since the bending of the central side corner portion is completed after the bending of the plate material edge side corner portion, the width of the plate material is already narrowed. However, even if the three roller die face plate units 31, 32, 33 are arranged side by side, a very wide width is not required. Therefore, an extreme increase in the width of the molding machine accompanying the provision of the three roller die face plate units in parallel occurs. Absent. On the other hand, in the lip forming zone 24, the corners on the edge side of the plate are bent and formed. At this stage, the plate is wide and the roller die face plate unit also needs a wide width. The roller die face plate unit requires a considerably wide width, and the width of the molding machine increases remarkably. However, since the lip die molding zone has only one type of roller die face plate unit, the problem that the width of the molding machine increases remarkably Absent.

In the embodiment, the case of forming the channel steel with a lip has been described, but the invention is not limited to this.
Any similar cross-sectional shape having a portion corresponding to the flange portion and a portion corresponding to the lip portion of the channel steel with a lip can be applied.

[0021]

According to the present invention, in the flange forming zone, a new product size can be dealt with by simply moving the entire group of roller die face plate units in three rows and a plurality of stages to the left and right. Roll changing work becomes extremely efficient.

By deciding the three product sizes to be manufactured concretely, it is not necessary to adjust each roller of the roller die face plate unit. Therefore, no skill is required for the work when the rolls are reassembled, and a high degree of skill is required. The operator who has it becomes unnecessary.
In addition, the work using a crane becomes unnecessary.

In the flanging zone, the width of the plate material has already been narrowed because the bending is performed on the center side corner part after the bending of the plate side edge side corner part is completed.
Even if the three roller die face plate units are arranged side by side, a very wide width is not required. Therefore, it is possible to avoid an extreme increase in the molding machine width associated with the parallel arrangement of the three roller die face plate units.

Unlike the conventional sole plate system, it is not necessary to separately provide a large floor surface for placing the sole plate when the rolls are reassembled, and only the space for the molding machine is required. Therefore, the factory floor space can be saved.

Since a spare roll for changing the product size is not required separately, roll management is simplified and workability as a whole manufacturing site is improved.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a roll forming machine showing an embodiment of the present invention.

FIG. 2 is a schematic side view of the same.

3 is a schematic cross-sectional view taken along the line AA in FIG.

FIG. 4 is a schematic cross-sectional view taken along line BB in FIG.

FIG. 5 is a front view of a part of the roller die face plate unit in the flange forming zone.

6 is a side view of the roller die face plate unit of FIG.

FIG. 7 is a front view of the roller die face plate unit in the lip forming zone.

FIG. 8 is a partially cutaway side view of a main part showing an embodiment of a pinch roll stand using a disc spring in a portion that receives a pressing force.

9 is a sectional view taken along line CC of FIG. 8 showing the disc spring case portion in FIG.

FIG. 10 is a graph showing experimentally obtained results of the relationship between the material plate thickness and the pinch roll rolling force required to drive the plate material.

FIG. 11 is a cross-sectional view of a channel steel with a lip, which is an example of a product to be formed in an example.

FIG. 12 is a front view showing a conventional roll forming machine.

[Explanation of symbols]

20 Channel steel with a lip (plate material) 20a Web part 20b Flange part 20c Lip part 21 Molding machine bed 23, 25, 27, 28 Pinch roll (drive-only roll) 24 Lip molding zone 26 Flange molding zone 31, 32, 33 Roller Die face plate unit 31a, 32a, 33a Face plate 37 Movable frame 38 Rails 51, 81 Abutting roller 52, 82 Base roller (receiving roller) 53, 83 Side roller (receiving roller) 70 Roller die face plate unit 71 Main face plate 72 Guide 73 Secondary Face plate 75 Adjusting screw 101 Roll stand 103 Upper roll 104 Upper chock 106 Lower roll 110 Disc spring case body 111 Holding lid part 116 Disc spring 117 Stand cap 118 Intermediate shaft 120 Disc spring case

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideyoshi Hideyoshi 4-17-18 Shibayama, Funabashi City, Chiba (56) References JP-A-1-205821 (JP, A) JP-A-2-192822 (JP, A ) JP-A-50-95169 (JP, A)

Claims (4)

(57) [Claims] 1. A roller provided with a free rolling abutting roller that contacts the inner rounded portion of the corner and two free rotating receiving rollers that respectively contact the outer surfaces of the two sides sandwiching the corner near the corner. The plate material is bent and formed by the abutting roller and the receiving roll in the die face plate unit, and the plate material is driven and driven on the both sides of the horizontal web portion by the roller die forming method in which the feed and drive dedicated roll is used. A roll forming machine for forming a cross-sectional shape having a bent flange portion and further bent lip portions on both sides thereof, wherein a lip forming zone for forming the lip portion by bending and a downstream side of the lip forming zone. And a flange forming zone for bending and forming the flange portion with the abutting roller and the lip forming zone. It is equipped with a roller die face plate unit for each product size that can move and adjust two receiving rollers facing each other according to the product size. The flange forming zone has three dedicated product sizes for three product sizes. A roll forming machine comprising roller die face plate units arranged in parallel so as to form three rows of a center row and left and right rows, and the entire roller die face plate unit group being integrally movable left and right. 2. A pinch roll as a feed drive dedicated roll is arranged upstream of the lip forming zone, between the lip forming zone and the flange forming zone, and downstream of the flange forming zone. 1. The roll forming machine according to 1. 3. The pinch roll as a roll dedicated to the feed drive includes a disc spring that receives a pressing force between an upper chock that supports an upper roll shaft and a stand cap. The roll forming machine described. 4. A disc spring is housed in a disc spring case fixed to the upper surface of an upper chock, and a vertical holding shaft is attached to a stand cap so that its vertical position can be adjusted. 4. The roll forming machine according to claim 3, wherein the disc spring case is engaged with the disc spring so as to be movable in the vertical direction, and the reaction force of the disc spring is received by the lower end surface of the pressing shaft.