JPH0512052B2 - - Google Patents

Description

[Detailed description of the invention]

Industrial Application Field The present invention can be used to create door frames, moldings, etc. (hereinafter simply referred to as "moldings") by bending a continuous molding material having a predetermined cross-sectional shape into a predetermined shape, and then cutting it to a predetermined size. This invention relates to a method for manufacturing moldings that can be applied to the manufacturing of moldings. Conventional technology Conventionally, in order to manufacture this type of moldings, a bending process was performed in which a guide roll element for bending the material was installed on the outer frame with a universal joint mechanism, using a plurality of rolls to form an insertion gap for the molding material. It is known to apply the device (Special Publication No. 1983
No. 43165). This bending device supports a guide roll element for material bending inside an inner frame with pins from left and right directions that intersect with the feed axis direction of the molding material. It is supported by pins inside the outer frame from the intersecting vertical direction, and the outer frame is fixed to the rotating plate with screws, and the rotating plate is connected to the sliding plate by meshing with a plurality of protrusions provided on the periphery of the rotating plate. The slide plate is supported by a shaft-supported trochanter, and this slide plate is attached to the slide support frame so that it can move up and down using a ball screw mechanism that is driven by a motor.The slide plate is also mounted in the left and right directions using a ball screw mechanism that drives the slide support frame to the machine frame with a motor. By being movably mounted, the linear molding material inserted from the guide roll element for material delivery positioning to the guide roll element for material bending is bent in multiple dimensions. Problems to be Solved by the Invention However, in this bending device, the molding is performed according to an X-Y program that appropriately combines both the vertical ball screw mechanism provided on the slide plate and the horizontal ball screw mechanism provided on the slide support frame. The bending process is performed by taking into consideration the material characteristics of the molding material by being driven by a command from a detector that measures the delivery dimensions of the molding material, so the program becomes complex and accurate bending cannot be performed. Difficult to do. In addition, during the bending process, the bending fulcrum of the material is the single point where the positioning guide roll element inserts and supports the molding material in both vertical and horizontal directions, so it can be bent in multiple dimensions with a constant curvature. Even if you control to change the bending curvature of one side (vertically or horizontally) during the process, the effect will also be felt on the other bending curvature, so you must control both. This not only makes control extremely complicated, but also makes it difficult to adjust each time the material lot changes. Since the molding material may not maintain linearity in the longitudinal direction and be bent as a whole, it is almost impossible to control when bending the molding material in multiple dimensions in the longitudinal direction. . In addition, in this bending device, the slide support frame is equipped with a slide plate, a rotary plate mechanism, a universal joint mechanism, a ball screw mechanism that moves the slide plate up and down, and a motor, so the weight of not only the slide support frame but also the slide plate is is very large, and it is difficult to control accurately due to the influence of inertia when starting and stopping vertically, horizontally, and horizontally, making it difficult to form moldings accurately, and as a result, the molding material is thin and tall. If it does not have rigidity, it may easily bend. Also,
In this bending device, by placing a cutting device at the rear, the axially bent molding material is subsequently cut to size, but the axial direction of the molding material is aligned with the axis according to the desired shape Since the molding material is not always bent, the cutting device cannot accurately cut the molding material into a predetermined length corresponding to the bent shape of the molding material. The present invention provides a molding that can manufacture moldings by bending the axial direction of the molding material multi-dimensionally as desired with a simple program, and cutting the molding material to a predetermined length according to the bent shape. The purpose of the present invention is to provide a method for manufacturing deings. Means for Solving the Problems In the method for manufacturing moldings according to the present invention, the entire length of a long molding material that has been bent into a predetermined cross-sectional shape is divided into arbitrary fixed lengths. A plurality of imaginary segments are obtained in advance, and the amount of movement of each axial bending mechanism of the bending device that inserts and supports the molding material along the axial direction is set for each imaginary segment, and each segment is detected using a detector. The axial direction of the molding material is detected by detecting the continuous feeding of the molding material, and individually controlling the movement of each axial bending mechanism of the bending device by a predetermined movement amount in response to the command from the detector. The molding material is bent in multiple dimensions with desired consecutive different curvatures, and the cutting device is run in synchronization with the feeding of the axially bent molding material. After traveling, a cutting device is driven to cut the continuous molding material into a predetermined length. Function In this method of manufacturing moldings, the molding material is bent according to a program that moves each bending mechanism individually for each segment, so the program is not only extremely easy to set, but also Since the movement of each bending mechanism is controlled according to a specific program, molding materials can be accurately bent along the axis in two or three dimensions.
Further, along with this, it becomes possible to accurately cut the molding material to a predetermined length according to a predetermined bending shape. Embodiments The following description will be made with reference to the drawings. In this example, when manufacturing a molding for a vehicle, the material is a flat thin plate-shaped strip material that can be plastically worked, such as a stainless steel plate, and its surface is pre-synthesized to prevent scratches. It is best to attach a resin protective film along the length. This strip material is bent in advance into a predetermined cross-sectional shape to obtain a molding material, and then the axial direction is bent into multiple curvatures in multiple dimensions using a bending device, and then the axial direction is bent. The molding material is then cut to size to produce moldings. There are several types of vehicle moldings that differ depending on where they are installed on the vehicle body, and their cross-sectional shapes vary depending on the area around the front or back window, the triple rail, and even the fender, and the length also varies. It makes a difference. As shown in Fig. 1, these moldings for each vehicle are made by forming a metal stop material X into a long molding material X' having a predetermined cross-sectional shape using a cold roll forming machine A. At the same time, it is fed into the first and second holding devices B and C at a substantially constant speed to be held slidably in the axial direction, and is inserted into the rear bending device D to be bent in multiple dimensions. Then, it is manufactured as a molding by cutting it into a predetermined length using a traveling cutting device E. On the way, a detector F is placed between the first holding device B and the second holding device C to measure the length of the molding material
The bending device D and the traveling cutting device E are driven and controlled by the bending device D and the traveling cutting device E. As shown in Figure 2, the molding material holding devices B and C are made of resin with excellent wear resistance and slipperiness such as polyacetal.
A first holding device B in the form of a long box in which a slit b is formed through which X′ is inserted, and a pair of left and right horizontal rolls c ₁ , c that hold the molding material X′ from at least the left and right sides as shown in FIG. ₂ and a second holding device C comprising a plurality of sets of intermediate horizontal rolls _C3 arranged in series for holding down the left and right flange portions or the inner surface side. Among the holding devices, a detector F such as a rotary encoder that rotates according to the feeding amount by contacting the molding material X′ can be placed in front of the second holding device C. It is possible to measure the feeding amount of the molding material X' whose surface shape has been bent into a predetermined shape but whose axial direction remains straight. The bending device D is driven by a controller G according to the length measured by the detector F.
As shown in FIG. 4, they are mounted together with a second holding device C on a base plate 13 whose left and right sides are fixedly supported by upright frames 11 and 12 on the plate surface of the machine stand 10. This second holding device C is the base plate 13
Further, the bending device D is attached so as to be swingable from side to side by pivotally supporting the base plate 14 with a support shaft 15, as shown in FIGS. 5 and 6. A rising plate 16 is integrally attached to the base plate 14 of the bending device D in a vertical manner and perpendicular to the feeding direction of the molding material. ，
As shown in Figure 7, left and right support rolls 20 support the molding material X' fed from the second holding device C from at least the left and right sides and hold it in the horizontal direction.
a, 20b are attached. These left and right support rolls 20a and 20b are made of molding material.
It is preferable to attach an intermediate support roll 20c that presses the left and right flange portions or the inner surface side depending on the cross-sectional shape of X'. Those left and right support rolls 20a, 20
b and 20c are curved opposing surfaces that form gaps through which the molding material X' having a predetermined cross-sectional shape is inserted, and these supporting rolls 20a, 20b, 20
The axial direction of the molding material X' held by c can be horizontally bent at least to the right or left. The horizontal bending mechanism is for swinging the base plate 14 to the right or left using the support shaft 15 as a fulcrum, and this drive mechanism is for rotating the base plate 14 as shown in FIG.
A guide pin 2 is placed on the tip side away from the support shaft 15 of 4.
1a and 21b are mounted so as to protrude downward so as to be used alternately and selectively, and the guide pin 21
a, 21b are selectively engaged with cam grooves 23a, 23b formed on the plate surface of the slide plate 22 to move the slide plate 22 back and forth in the horizontal direction. As shown in FIG. 4, the slide plate 22 has a U-shaped guide frame 24a on the left and right sides,
24b, the plate 22
A plurality of drive cylinders 27 are connected in series between the bracket plates 25 and 26 respectively attached to the rear end side and the machine base 10 below the base plate 13. By sliding the drive cylinders 27, the cam grooves 23a,
The base plate 14 is configured to swing to the right or left about the support shaft 15 along the axis 23b. In addition to this horizontal bending mechanism, the riser plate 16 is provided with a vertical bending mechanism.
Its vertical bending mechanism consists of left and right support rolls 20.
It consists of upper and lower support rolls 30a and 30b arranged behind the rollers a, 20b and 20c, and these upper and lower support rolls 30a and 30b are supported by a pair of left and right bracket plates 31a and 31b, as shown in FIGS. 6 and 7. As shown, each bracket plate 31a, 3
By inserting support shafts 33a and 33b, which are protruded laterally from 1b, into support brackets 32a and 32b which protrude from the stand-up plate 16, the support shafts 1b are configured to be uniaxially supported so as to be vertically deflectable, preferably swingable. . The support shafts 33a, 33b are fixed to the bracket plates 31a, 31b with keys,
Further, it is rotatably supported by bearing brackets 32a and 32b. One side 32b of these spindles
The bracket plate 3 is attached as shown in Fig. 4.
A drive mechanism 34 that swings 1a and 31b is linked. As a driving source, several cylinders connected in series are used, and the rear end is fixed with a support bracket 35, and a linear motion plate 36 is attached to the front end. A notch 36a is provided in the plate surface of the linear motion plate 36 in an obliquely linear manner, and a pin 37a protruding from the side surface near the free end of the cam plate 37 is engaged with the notch 36a. The cam plate 37 is in an eccentric position and rotates around the rotating shaft 37b.
The rotating shaft 37b is supported by a bearing 38, so that it can swing. This rotating shaft 37b and the support bracket 32a,
32b can be connected to the support shaft 33b by a spline shaft 39 via a universal joint. The spline shaft 39 is expandable and retractable as the base plate 14 swings about the support shaft 15, and a flexible shaft formed by twisting steel wire may be used instead of this shaft. When using this flexible shaft, it is recommended to arrange the flexible shafts on both sides around the drive source, and connect one side to the spindle 33a and the other side to the spindle 33b so that the torsional directions are opposite to each other. desirable. In addition to these horizontal bending and vertical bending mechanisms, an axial twisting mechanism can be provided.
As shown in FIGS. 5, 6, and 7, the torsion mechanism includes upper and lower rolls 30a,
30b on the rotary plate 40 and the rotary plate 40
is fitted into the rising plate 16, and its rotating plate 40
Worm gear 4 equipped on the rising plate 16
1 and a worm wheel 42 provided on a rotating plate 40. As shown in FIG. 4, this worm gear 41 has a rotary drive source 43 which is made up of several drive cylinders connected in series, similar to the horizontal bending and vertical bending mechanisms. It is adapted to be connected to the support shaft 41a of the worm gear 41 via. The rear end side of the rotational drive source 43 is a support plate 4
6, and the rack 44 is attached to the rod of the drive cylinder located at the distal end. The pinion 45 is rotatably supported by a bearing 47, and rotational force can be transmitted to the worm gear 41 by connecting its support shaft 45a and the support shaft 41a of the worm gear 41 with a spline shaft or flexible shaft 48 via a universal joint. installed on. The bending device configured in this manner is based on the base plate 14 that swings about the support shaft 15 along the cam groove 23a or 23b of the slide plate 22, and has a horizontal bending mechanism, a vertical bending mechanism, and other functions as necessary. Each is equipped with an axial torsion mechanism that operates accordingly. When the molding material
By changing the direction of the gaps 0a, 20b, and 20c by swinging the base plate 14 to the right or left about the support shaft 15, the molding material X' inserted from the second holding device C can be moved to the left or right. Can be curved. When bending the axis in the vertical direction, upper and lower support rolls 30a and 30b, which are similarly equipped via a rotary plate 40 serving as a base, are placed above and below the supporting shafts 33a and 33b of the bracket plates 31a and 31b. The molding material X' can be curved by changing its posture from the horizontal position upward or downward by swinging downward. All of these bending processes are performed on the support shafts 15, 33a and 33b.
Since this is performed by swinging around the center, the posture can be changed smoothly and the molding material X' can be bent accurately in the axial direction. The bending ratio can be set to a desired angle by appropriately adjusting the cylinder strokes of the rotary drive mechanisms 27 and 34, that is, by appropriately selectively operating a plurality of connected cylinders. With this angle adjustment, the left and right and middle support rolls 20a, 20b, 20c, and the upper and lower support rolls 30a, 30b change the orientation of each gap over time with respect to the molding material The axial direction of ' can be bent continuously or simultaneously to the right or left, upward or downward. In addition to these two-dimensional bending, when bending is performed by twisting the axial direction as necessary, the worm gear 41 is rotated to bend the rotating plate 40 through the worm wheel 42.
Just rotate it at the desired angle. When the rotary plate 40 rotates, the left and right support rolls 20a, 20b, 20c integrally attached to the rotary plate 40 and the upper and lower support rolls 30a, 30b are molded with molding material.
In order to change the position diagonally from the horizontal or vertical position by inserting X', the axis of the molding material X' can be twisted between the holding device C and bent in three dimensions. When bending in these two-dimensional or three-dimensional directions, for example, vertical bending can be applied to the molding which is formed into an arcuate shape from a plane, and axial torsion can also be applied as necessary. For the bending process, as shown in Fig. 9, the entire length of the molding is divided into imaginary segments 1 to T of arbitrary fixed length, and a horizontal bending mechanism and a vertical bending mechanism are used for each segment 1 to T. This can be done by operating the directional bending mechanism and, if necessary, the axial twisting mechanism by a predetermined amount of deflection. As shown in Fig. 1, each segment 1 to T is detected by a detector F such as a rotary encoder that measures the feeding dimension while feeding the molding material X' into the bending device D, and the detection signal is sent to the controller G. By instantaneously calculating the drive amount and individually transmitting a drive stop control signal to each drive source 27, 34, 43, each mechanism can be controlled instantaneously to the drive amount corresponding to segments 1 to T without delay. I can do it. For example, when manufacturing molding around a window, the total length is about 1500 mm, so it is divided into 30 to 32 or 50 to 60 segments, and the amount of movement is stored in controller G for each segment as shown in Table 1. The bending process can be performed according to the diagram shown in Table 2 by instantly operating each mechanism while detecting the segment with the detector F.

【table】

Claims (1)

[Claims] 1. A plurality of imaginary segments are obtained in advance by dividing the entire length of a long molding material bent into a predetermined cross-sectional shape into arbitrary fixed lengths,
The amount of movement of each axial bending mechanism of the bending device that inserts and supports the molding material along the axial direction is set for each imaginary segment, and each segment is detected by a detector according to the continuous feeding of the molding material. In response to the command from the detector, each axis bending mechanism of the bending device is individually controlled to move by a predetermined amount of movement, and the axial direction of the molding material is multi-dimensionally moved at a desired continuous different curvature. The cutting device is driven in synchronization with the delivery of the axially bent molding material, and the cutting device is driven after the molding material has traveled a predetermined distance based on the command from the detector to continuously cut the molding material. A method for manufacturing moldings, characterized in that a molding material is cut into a predetermined length. 2. Claim 1, wherein the multi-dimensional bending process is performed in the horizontal direction and the vertical direction, respectively, with respect to the axial direction of the molding material.
2. Method for manufacturing moldings described in Section 1. 3. Manufacture of moldings according to claim 1, wherein the multidimensional bending process is performed in the horizontal direction, perpendicular direction, and torsional direction of the axial line of the molding material, respectively. Method. 4. The method of manufacturing moldings according to claim 1, wherein each of the segments is detected by a rotary encoder.