JPH033525B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION 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.

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, for example, as shown in FIG.
When forming a tapered plate material 1 having a cross-sectional shape having curved portions 1c and 1b at the middle portion in the width direction, each portion is sequentially processed mainly using a hydraulic press device. Therefore, in such a conventional method, there was a problem that the processing efficiency was poor because the pressing process was repeatedly performed.

The present invention has been made in view of this point, and an object thereof 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.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 2 and 3, stands 3 and 4 are installed facing each other on a base frame 2 at a required interval, and a drive device is provided between the stands 3 and 4 on one side of the stand 3. The upper and lower drive shafts 6 and 7, which are rotatably driven by the upper and lower shafts 5, are supported by bearings 8 at a predetermined interval. Fixed roll pieces 9 and 10 for forming plate materials are provided, and movable roll pieces 13 and 14 for forming plate materials are provided at intermediate portions of the drive shafts 6 and 7, and are movable in the axial direction via bushes 11 and 12. At the same time, a protrusion 13a formed on the outer periphery of the end of the upper moving roll piece 13 is formed on the outer periphery of the end of the lower moving roll piece 14.
a so that both movable roll pieces 13 and 14 can move together. Further, movable roll pieces 13 and 14 are provided at the end of the upper drive shaft 6 on the side of the stand 4.
A guide roll 16 is fitted from above to the seat cam 15 for moving the seat cam 15 in the axial direction, and guides the movement of the seat cam 15 (in the direction perpendicular to the plane of the paper in FIG. 2). A moving block 17 is provided at the end of the stand 4 via a bush 12, and an engaging member 18 is fixed on the surface of the moving block 17 on the lower moving roll piece 14 side. , bolt 1 is attached to the surface of the downward moving roll piece 14 on the moving block 17 side.
Rotatably engage the hook receiving ring 20 attached by 9. Further, at a position between the moving block 17 of the lower drive shaft 7 and the stand 4, there is a rack 21 carved in the longitudinal direction of the lower surface of the end of the seat cam 15.
A pinion 22 is attached to the upper part of the moving block 17 to engage the seat cam 15 (which may be integrated or have a different name) and move the sheet cam 15 in synchronization with the rotation of each roll piece 9, 10, 13, and 14. is a guide groove 1 provided in the longitudinal direction of the lower surface of the seat cam 15.
5a, and a cam follower 25 is provided at the lower part of the moving block 17 to engage 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 and 25 are rotatably provided with respect to the shaft 26.
Moreover, an appropriate number of bearings 27 are provided on the outer peripheral surface.

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 device 5 is now driven, the drive shafts 6 and 7 are driven, and the fixed roll pieces 9 and 10 and the movable roll pieces 13 and 14 are integrally moved with the drive shafts 6 and 7. The guide roll 16 and pinion 22 also rotate. At this time, roll pieces 9, 11 and roll piece 1
The sheet cam 15 is inserted between the guide roll 16 and the moving block 17.
When the cam follower 23 is inserted into the guide groove 15a and the pinion 22 is engaged with the rack 21 of the sheet cam 15, the sheet cam 15 moves in synchronization with the rotation of each roll piece 9, 10, 13, and 14. . Also, at this time, since the cam follower 23 moves along the inclined guide groove 15a of the seat cam 15, the moving block 17 to which the cam follower 23 is attached moves on the lower drive shaft 7. Note that the moving block 17 does not move the lower cam follower 2 during this movement.
5 is engaged with the guide recess 24a of the guide block 24, so it does not rotate. By this,
The moving force of the moving block 17 is transmitted to the lower moving roll piece 14 via the engaging member 18 and the hook receiving ring 20, and the engagement between the concave groove 14a of the lower rolling piece 14 and the protrusion 13a of the upper moving roll piece 13 is caused. Both moving roll pieces 13 and 14 move integrally. Therefore, fixed roll pieces 9, 10 and moving roll pieces 13,
14 is the distance between the guide groove 15a and the cam follower 2.
3, and the width of the plate material 1 that passes through and is formed also changes in accordance with the above change,
In the end, the plate material 1 is formed into a tapered shape. That is, the plate material 1 is tapered in accordance with the inclination angle of the guide groove 15a.

Next, using three roll forming apparatuses of the present invention,
The process of forming the tapered plate material 1 as shown in FIG. 1 will be specifically explained. Here, for example, as shown in FIG. 5, each roll forming device A, B, C
It is assumed that the roll pieces 9, 10, 13, and 14 are each shaped to form both ends of the plate material 1 as shown in FIG.
A case where C are arranged on the same line will be described.
First, a flat plate material 1 of a predetermined width is inserted between the roll pieces 9, 13 and 10, 14 of the roll forming apparatus 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 has movable roll pieces 9, 10,
By the movement of 13 and 14, the flange parts 1a and 1b as shown in FIG. 6A are processed into a relatively finished state and sent to the next roll forming apparatus B. At this time, since the sheet cam 15 is also sent to the roll forming apparatus B in synchronization with the plate material 1, the sheet material 1 is bent in the same width state in the roll forming apparatus B as well. That is, the flange portions 1a and 1b are further bent as shown in FIG. 6B. 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 bent and formed into a cross-sectional shape as shown in FIG. 6C. That is, a complex final cross-sectional shape as shown in FIG. 1 is formed. Although the above description focuses on the same cross section, other cross sections are molded in exactly the same way. However, since the guide groove 15a is inclined, the width changes accordingly, and the final shape becomes tapered as shown in FIG.
Note that the roll forming apparatus is not limited to the three stages A, B, and C described above, but a plurality of combinations of the roll forming apparatuses A, B, and C may be arranged to form six stages, nine stages, and so on.
or by adding another roll forming device to the combination of roll forming devices A, B, and C to form 5 steps, 7 steps, etc., the number of steps corresponds to the cross section of the required product. Of course it is possible. Furthermore, in Fig. 5 and Fig. 6, the case where a predetermined cross section is formed by roll forming devices A, B, and C was explained, but if the cross section is complicated or the product is thick, the roll forming devices A, B, and C may be used. It is also possible to have four or more stages instead of three stages. In addition, in the above processing, the width of the product decreases (or increases) when it is constant, but by changing the guide groove 15a to 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, and for example, the vertical arrangement may be completely reversed.

As explained above, according to the roll forming apparatus of the present invention, since a pressing process is not required, tapered plate materials can be formed easily and efficiently. Since the rotation of each roll piece is ensured in synchronization with the rotation of each roll piece through meshing, the moving speed of the sheet cam and the plate material are synchronized, making it possible to obtain a highly accurate tapered plate material.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of a tapered plate material, Fig. 2 is a cut front view of the roll forming apparatus of the present invention, and Fig. 3 is an explanatory diagram of a tapered plate material.
FIG. 4 is an explanatory diagram of the cam follower; FIG. 5 is a plan view of a state in which plate material is formed using a plurality of the devices shown in FIG. 2; FIG. 6 is a, b, C is an explanatory diagram showing changes in the shape of the plate material. 1... Plate material, 3, 4... Stand, 5... Drive device,
6, 7... Drive shaft, 9, 10... Fixed roll piece, 1
3, 14...Moving roll piece, 15...Sheet cam, 1
6...Guide roll, 21...Rack, 22...Pinion.

Claims (1)

[Claims] 1 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 In addition to being equipped with a sheet cam for moving the movable roll piece,
A rack is provided in the longitudinal direction of the seat cam, a pinion that can mesh with the rack is attached to one drive shaft, and a guide roll for guiding the movement of the seat cam is provided on the other drive shaft. Roll forming equipment.