JPS60223617A - Device for roll formation - Google Patents

Abstract

PURPOSE:To form with good accuracy and high efficiency a tapered plate material having a shape section by using two driving units and by making the speed ratio of a driving shaft variable. CONSTITUTION:When a driving unit 5 and 29 are operated a driving shaft 6, 7 and 30 are driven and a fixed roll frames 9, 10 and a moving roll frames 13, 14 and a guide roll 16 are rotated uniting to the driving shaft 6, 7 and a pinion 22 is rotated according to the revolution speed of the driving shaft 30. A plate material is inserted between the roll frames 9, 13 and roll frames 10, 14 and a sheet cam 15 is inserted between the guide roll 16 and a moving block 17 and a cam follower 23 is engaged with a guide groove. Due to the speed ratio of the driving shaft 6, 7 and 30 being made variable, then, the speeds of the sheet cam 15 and the plate material are allowed almost completely to coincide and the desired shaped plate material is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a roll forming apparatus for forming, for example, a tapered plate material having an irregular cross-section whose cross-sectional shape changes in the longitudinal direction.

(Prior Art) In the automobile industry, tapered plate materials whose cross-sectional shape changes in the longitudinal direction are used, such as wide door frames and belt moldings with irregular cross sections. Conventionally, as shown in FIG. 1, for example, when forming a tapered plate material 1 having a cross-sectional shape that has flanges 1a and 1b bent at an acute angle at both ends in the width direction and a curved part 1C in the middle part in the width direction. , each part was processed sequentially, mainly using hydraulic press equipment. Therefore, in such a conventional method, since the pressing process is repeated, there is a problem that processing efficiency is poor.

(Object of the Invention) The present invention has been made in view of this point, and its object is to provide a roll forming apparatus that can form a tapered plate material having an irregular cross section with high precision and high efficiency.

(Structure of the Invention) The present invention achieves this object by supporting a pair of drive shafts between opposing stands, and attaching a fixed roll to the pair of drive shafts. and a movable roll piece that is movable integrally in the axial direction next to the fixed roll piece, and is provided with a sheet cam for moving the movable roll piece, and the movement of the sheet cam is performed in the longitudinal direction. The invention is characterized in that this is carried out by using a rack provided on the rack and a pinion that meshes with the rack, and that the speed ratio between the rotational speed of the pinion and the rotational speed of the drive shaft can be changed. be.

(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 2 and 3, on the base frame 2,
In addition to installing stands 3 and 4 facing each other at a required interval,
Between the stands 3 and 4, upper and lower drive shafts 6 and 7, which are rotationally driven by a first drive device 5 provided on one stand 3 side, are supported by bearings 8 at a predetermined interval, and the upper and lower drive shafts are supported by bearings 8 at a predetermined interval. Axis 6. .

A fixed roll piece 9.10 for sheet material forming whose movement in the axial direction is restricted is provided at the side end of the stand 3 of 7, and a bushing 11° 12 is provided at the intermediate portion of the drive shaft 6.7. Moving roll piece 13.1 for plate forming with free movement in the axial direction
4, and the protrusion 13a formed on the outer periphery of the end of the upper moving roll piece 13 is engaged with the groove 148 formed on the outer periphery of the end of the upper moving roll piece 14.
3°14 can be moved as a unit. Furthermore, a sheet cam 15 for moving the movable roll pieces 13 and 14 in the axial direction is fitted from above to the end of the lower drive shaft 6 on the side of the stand 4, so that the movement of the sheet cam 15 (in FIG. On the other hand, a moving block 17 is provided via a bush 12 at the end of the lower drive shaft 7 on the side of the stand 4, and an upper moving roll piece 14 of the moving block 17 is attached to the end of the lower drive shaft 7 on the stand 4 side. An engaging member 18 is fixedly provided on the side surface, and the engaging member 18 is rotatably engaged with a hook receiving ring 20 attached by a bolt 19 to the surface of the upper moving roll piece 14 on the moving block 17 side. urge Also, the second button located on the right side of the moving block 17 of the bushing 12
A pinion 22 for moving the seat cam 15 by engaging with a rack 21 (which may be integrated or separate) carved in the longitudinal direction of the bottom surface of the end of the seat cam 15 is rotatably attached to the seat cam 15. , on the top of the moving block 17,
Guide groove 15a provided in the longitudinal direction of the lower surface of the seat cam 15
A cam follower 23 is provided at the bottom of the moving block 17, and a cam follower 25 is provided at the lower part of the moving block 17, which engages with a guide recess 24a on the upper surface of a guide block 24 fixed on the base frame 2. As shown in FIG. 4, the cam followers 23, 25 are rotatably provided with respect to the shaft 26, and are provided with an appropriate number of bearings 27 on their outer peripheral surfaces. Further, a pinion 28 that circumscribes (meshes with) the pinion 22 is attached to a drive shaft 30 of a second drive device 29, and transmits the power of the drive device 29 to the seat cam 15 via the pinion 22. The bearing 31 is connected to the drive shaft 3
0 is supported.

The guide groove 15a of the seat cam 15 has an inclination in the direction of moving away from or approaching the stand 4 from the leading end toward the rear end in the traveling direction.

In the roll forming apparatus of the present invention having such a configuration, when the drive devices 5 and 29 are now operated, the drive shafts 6, 7 and 30 are driven, and the fixed roll piece 9 is moved integrally with the drive shaft 6.7. , 10, the movable roll pieces 13, 14, and the guide roll 16 rotate, and the pinion 22 rotates in accordance with the rotational speed of the drive shaft 30. In this state, roll piece 9
, 13 and the roll pieces 10 and 14, insert the plate 1,
The sheet cam 15 is inserted between the guide roll 16 and the moving block 17, and the cam follower 23 is engaged with the guide groove 15a. As a result, the rack 21 of the seat cam 15
Since the pinion 22 meshes with the pinion 22, the seat cam 15 moves in synchronization with the rotation of the pinion 22. Also, at this time, the cam follower 23 is aligned with the inclined guide groove 5a of the seat cam 15.
Since the movable block 17 with the cam follower 23 attached thereto moves on the lower drive shaft 7. Note that during this movement of the moving block 17, the lower cam 740-25 engages with the guide recess 24a of the guide block 24.

Therefore, it does not rotate. As a result, the moving force of the moving block 17 is transmitted to the upper moving roll piece 14 via the engaging member 18 and the hook receiving ring 20, and the concave groove 14a of the upper moving roll piece 14 and the protrusion 1 of the F moving roll piece 13 are transmitted to the upper moving roll piece 14.
3a, the two moving roll pieces 13.1'4 move together. Therefore, the distance between the fixed roll pieces 9 and 10 and the movable roll pieces 13 and 14 changes depending on the engagement position of the guide groove 15a and the cam follower 23, and the width of the plate material 1 that passes there and is formed also corresponds to the above change. Eventually,
The plate material 1 is formed into a tapered shape. That is, the guide groove 15a
The plate material 1 is tapered in accordance with the inclination angle.

Here, slippage actually occurs between the roll pieces 9, 10, 13, 14 and the plate material 1. On the other hand, the seat cam 15 moves accurately in accordance with the rotation of the pinion 22. Therefore, when the sheet cam 15 and the plate material 1 of the same length are inserted, the sheet cam 15 is ejected out of the device first, and the sheet cam 15 is ejected from the device first.
It is not possible to obtain a Taber plate material 1 that matches the shape of . Therefore, in this embodiment, two drive devices 5.29 are used, and the speed ratio between the drive shafts 6.7 and 30 is made variable.

In this way, the speeds of the sheet cam 15 and the plate material 1 can be almost completely matched, and the plate material 1 in the desired shape can be achieved.
can be obtained. Note that by providing a speed sensor that detects the moving speed of the plate 1 and controlling the rotation speed of the pinion 22 based on the output of the sensor, the speeds of the plate 1 and the sheet cam 15 can be easily matched.

Next, a process of forming a tapered plate material 1 as shown in FIG. 1 using three roll forming apparatuses of the present invention will be specifically explained. Here, for example, as shown in FIG. 5, roll pieces 9, 10, 13.1 of each roll forming device A, B, C
4 respectively connect both ends of the plate material 1 to Fig. 6 (a), (b),
Assuming that the shape can be formed as shown in (c), a case will be described in which these roll forming apparatuses A, B, and C are arranged on the same line. First, a flat plate material 1 of a predetermined width is inserted between the roll piece 9.13 and the roll piece 10.14 of the roll forming device A, and at the same time, the sheet cam 15 is inserted between the guide roll 16 and the moving block 17. Insert between. Therefore,
The plate material 1 is processed by the rotation of the movable roll pieces 9, 10, 13, 14 into a state in which the flanges 1a, 1b are relatively raised as shown in FIG.
sent to. At this time, the sheet cam 15 is also sent to the roll forming device [8] in synchronization with the plate material 1, so that the sheet material 1 is bent in the same width state in the roll forming device B as well. That is, the flange portions 1a and 1b are further bent as shown in FIG. 6(b). The plate material 1 that has passed through the roll forming device B is sent to the roll forming device C in the same manner as described above, where it is further subjected to a bending process and formed into a cross-sectional shape as shown in FIG. 6(c). That is, a complex final cross-sectional shape as shown in FIG. 1 is formed. Although the above explanation focuses on the same cross section, other cross sections are also molded in the same way. However, since the guide groove 15a is inclined, the width changes accordingly, and the final shape is different from the first one.
As shown in the figure, it has a taber. Note that the roll forming apparatus is not limited to the three stages A, B, and C described above, but may include a plurality of combinations of the roll forming apparatuses A, B, and C, such as six stages, nine stages, etc. - Binding, or adding another roll forming device to the roll forming devices A, B, and C of the above combination to create 5-stage, 7-stage, etc. binding, the number of stages corresponding to the cross section of the required product. Of course it is possible. Furthermore, in FIGS. 5 and 6, the roll forming apparatus fA,
Although the case where a predetermined cross section is formed using B and C has been described, if the cross section is complicated or the thickness of the product is thick, it is possible to use four or more stages instead of the three stages of A, B, and C. Further, in the above processing, the width of the product decreases (or increases) at a constant rate, but by changing the guide groove 15a into a curved shape, for example, the width of the product can be changed arbitrarily.

It should be noted that the present invention is not limited to the above-mentioned embodiment. For example, the upper and lower arrangement may be reversed, or the arrangement may be as shown in FIG. 7.

Figure 7 is a diagram showing a part of the configuration in which the drive shafts corresponding to the sheet cam advancement drive device (motor) and plate material forming drive device (motor) are shared. Although not shown in the drawings, the same reference numerals are used to denote the same parts as those in the embodiment described above. In the figure, a sprocket 35 is rotatably mounted on the drive shaft 7, and the pinion 22 is fixed to the sprocket 35. The chain 36 is driven by a motor 37, and the sprockets 35 at each stage are engaged with the chain 36.

The sprocket 38 is attached to the drive shaft 7 using a key and a keyway (not shown) so as to rotate integrally with the drive shaft 7, and is engaged with a double chain 39 driven by a motor 40. The motor 37 functions as a driving device for advancing the sheet cam 15, and the motor 40 functions as a driving device for forming the plate material 1. Therefore, since a large driving force acts on the sprocket 38, a double chain 39 is used.

The operation of this embodiment is exactly the same as that of the previous embodiment, but it has the advantage that it is not necessary to provide separate drives for each stage.

(Effects of the Invention) As explained above, according to the O-ru forming apparatus of the present invention, a pressing step is not required, so that a tapered plate material can be formed easily and efficiently. Furthermore, since the moving speeds of the sheet cam and the plate material can be matched, a highly accurate tapered plate material can be obtained.

[Brief Description of the Drawings] Figure 1 is an explanatory diagram of a tapered plate material, Figure 2 is a cutaway front view of the roll forming apparatus of the present invention, Figure 3 is a partial perspective view of Figure 2, and Figure 4 is a cam follower. FIG. 5 is a plan view of a state where a plate material is being formed using a plurality of the apparatuses shown in FIG. 2, and FIG. 6 (A). (B) and (C) are explanatory diagrams showing changes in the shape of the plate material, and FIG. 7 is a perspective view of main parts showing another embodiment of the present invention. 1... Plate material 3, 4... Stand 5.29, 37.40... Drive device 6.7.30... Drive shaft 9.10... Fixed roll piece 13.14... Movement Roll piece 15... Sheet cam 16... Guide roll 21.
... Rack 22.28 ... Binion 35.38 ...
・Sprocket 36.39...Chain patent applicant Shiraki Metal Industry Co., Ltd. Representative Patent attorney Fuji Ijima

Claims (1)

[Claims] A pair of drive shafts are supported between opposing stands, and each of the pair of drive shafts is provided with a fixed roll piece and a movable roll piece that is movable integrally in the axial direction next to the fixed roll piece, and A first sheet cam for moving the movable roll piece is provided, and the movement of the sheet cam is performed using a rack provided in the longitudinal direction of the sheet cam and a pinion that meshes with the rack. A roll forming apparatus characterized in that the speed ratio to the rotational speed of the drive shaft can be changed.