JPH0260413B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention [Field of Industrial Application] The present invention relates to a core metal insertion device for bending that inserts a core metal into a hollow material when bending the hollow material.

[Prior Art] Conventionally, in order to easily feed a hollow material into a bending device, a core metal has been made to move forward and backward, and when bending a hollow material, the core metal is placed at a predetermined bending position of the hollow material. There are known devices that are inserted to prevent the formation of wrinkles on the inside of a hollow material when bent, flattening of the cross section of the hollow material, or thinning of the outside of the hollow material when bent.

[Problems to be Solved by the Invention] However, if the predetermined bending position at which the core metal is inserted changes, the state of wrinkle formation, the aspect ratio, the wall thickness reduction rate, etc. may change. With these conventional devices, during bending, the hollow material and the inserted core metal may rub against each other, causing the tip of the core metal to wear out. There was a problem in that the bending position would move backwards, resulting in changes in the state of wrinkle formation, aspect ratio, and wall thickness reduction rate.

In addition, in such cases, either remove the core metal from the device and install a new one, or reshape the tip of the core metal, reinstall the core metal in the device, and then reinstall the core metal. Since the change in the position of the tip of the core metal was corrected, there was a problem that the operation was cumbersome.

Therefore, an object of the present invention is to solve the above-mentioned problems, and the present invention aims to shape the tip of the core metal without removing the core metal from the device, and to correct the change in position due to the shaping. An object of the present invention is to provide a gold insertion device.

Structure of the Invention [Means for Solving the Problems] In order to achieve the above object, the present invention has the following structure as a means for solving the problems. That is, as illustrated in FIG. 1, it has a moving mechanism M2 that moves the core metal M1, which is provided to be movable forward and backward, to a predetermined position, and when bending the hollow material W, the moving mechanism M2 moves the core metal M1. A bending core metal insertion device for inserting a hollow material W into a predetermined bending position, the shaping mechanism moves a shaping tool M3 provided on a movement path of the core metal M1 to shape the tip of the core metal M1. M4, a tip detection means M5 for detecting the tip position of the core metal M1, and a tip detection means M5 that controls the moving mechanism M2 to move the tip of the core metal M1 to a shaping position by the shaping mechanism M4, by controlling the core metal M1
a shaping control means M6 for shaping a tip of the core metal M1; after the shaping, the moving mechanism M2 is controlled to move the core metal M1, and when the tip of the core metal M1 is detected by the tip detection means M4, a detected This is the structure of a bending core metal insertion device characterized by comprising: a movement control means M6 for moving the core metal M1 from a position to a predetermined bending position.

[Function] The core metal insertion device for bending having the above configuration has the following features:
The shaping control means M6 controls the moving mechanism M2,
The tip of the cored metal M1 is moved to a predetermined shaping position by the shaping mechanism M4, the shaping mechanism M4 is controlled to shape the tip of the cored metal M1, and the movement control means M7
However, after shaping, the moving mechanism M2 is controlled to move the core metal M1.
When the tip of the core metal M1 is detected by the tip detection means M5, the core metal M1 is moved from the detected position to a predetermined bending position. Therefore,
Core metal M1 can be removed without removing core metal M1 from the device.
In addition to shaping the tip of the head, the change in position due to the shaping is corrected.

[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 2 is a front view of a bending apparatus using a bending core inserting apparatus according to an embodiment of the present invention. This bending device includes a bending core insertion device 1 and a material supply device 4 placed on a base 2.
and a bending device 6.

The bending core insertion device 1 includes a machine frame 10 placed on a base 8 and a support stand 12 arranged on the machine frame 10. On the support stand 12, a moving mechanism M2 is provided. A moving device 14 is provided. The moving device 14 includes a support frame 16 placed on a support stand 12, and a drive sprocket 18 and a driven sprocket 20 rotatably supported at both ends of the support frame 16. A chain 22 is stretched between the driving sprocket 18 and the driven sprocket 20, and as shown in FIG. 3, a moving base 24 is connected to both ends of the chain 22. . One end of a connecting member 28 is fitted into a fitting hole 26 drilled in the moving table 24, and the moving table 24 and the connecting member 28 are connected by a pin 30 that passes through them, and are swingably supported. has been done. E-shaped retaining rings 32 are fitted to both ends of the pin 30 to prevent it from coming off.
The connecting member 28 also includes a long connecting member 34.
are connected by screws 36, and the connecting member 34
A slit 38 is formed at the tip of the slit 38, and two pins 40, 40 are inserted through the slit 38.

This slit 38 has a connecting plate 44 formed with grooves 42, 42 corresponding to the positions of the pins 40, 40.
is inserted, the pins 40, 40 are fitted into the grooves 42, 42, and the connecting member 34 and the connecting plate 44 are removably connected. Further, one end of the connecting plate 44 is inserted into a slit 48 formed in a core metal 46 made of synthetic resin, and the connecting plate 44 and the core metal 46 are fixed by rivets 50.

Furthermore, as shown in FIG. 4, the driving sprocket 18 is rotationally driven by a moving motor 52 placed on the support base 12 via a timing belt 54. Further, the rotation of the drive sprocket 18 is detected via the timing belt 56 by a movement amount detection encoder 58 that generates a pulse signal in accordance with the rotation.

A brake device 62 is locked to the tip of the support frame 16 via a bracket 60, and this brake device 62 includes brake cylinders 64 and 66 arranged on both sides of the bracket 60, respectively. . Sliding shafts 68, 70 are screwed into the rods of the brake cylinders 64, 66, respectively, and each sliding shaft 68, 70 is connected to a bracket 60, respectively.
It is slidably supported on support members 72 and 74 disposed above. Furthermore, contact members 76 and 78 are fixed to the tips of the sliding shafts 68 and 70, respectively. These abutting members 76, 78 are connected to the bracket 60.
The connecting member 34 is slidably supported on a guide member 80 fixed at the center of the guide member 80.
A groove 82 is formed according to the cross-sectional shape of. The connecting member 38 is fitted into this groove 82.
A pressing member 84 is fixed to the guide member 80 so as to cover the groove 82 into which the connecting member 38 is fitted.

On the other hand, an interlocking shaft 86 is slidably supported by the supporting members 72 and 74, and one end of a fixing member 88 fixed to one end of the interlocking shaft 86 is fixed to one sliding shaft 68. . Also, one support member 7
4, a swinging member 90 is swingably supported, and one end of the swinging member 90 is connected to the other end of the interlocking shaft 86, and the other end of the swinging member 90 is connected to the other sliding shaft 70.
They are engaged by pins 92 and 94, respectively.

Further, a shaping device 100 as a shaping mechanism M4 is provided in conjunction with the brake device 62, and this shaping device 100 is provided on the movement path of the core bar 46, as shown in FIG. Core metal 46
The shaping guide member 104 has an insertion hole 102 corresponding to the cross-sectional shape of the shape, and the shaping guide member 104 is fixed to a bracket 106. Further, two cylinders 108 and 110 are fixed to the bracket 106 so as to be orthogonal to each other, and joints 112 and 114 are engaged with the rods of the respective cylinders 108 and 110. Both joints 112 and 114 have orthotics 116 and 1, respectively.
18 are engaged, and both orthotics 116, 118
are supported by the shaping guide member 104 so as to be slidable in directions perpendicular to the movement path of the core metal 46.

In addition, a bending device 6 is provided in addition to the shaping device 100.
A photoelectronic switch 119 is provided on the side as tip detection means M5 which generates a signal when the light path is interrupted.

On the other hand, the material supply device 4 includes three guide devices 122 arranged on a machine frame 120 placed on the base 2.
As shown in FIG. 6, there are fixed guides 124 fixed to the machine frame 120, and movable guides 128 fixed to the tips of two guide bars 126 slidably supported on the machine frame 120. It is equipped with The fixed guide 124 and the moving guide 128 include
When the fixed guide 124 and the movable guide 128 are brought into close contact with each other, a pair of grooves 130 corresponding to the cross-sectional shape of the material W are formed between the fixed guide 124 and the movable guide 1.
28 in the longitudinal direction. Also, machine frame 1
The tip of the rod of the cylinder 132 fixed to the guide bar 126 is screwed into a fixing member 134 installed at the rear end of the guide bar 126.

This material supply device 4 drives a supply motor 136 to feed the material into the groove 13 through a ball screw 138.
This is a configuration in which a moving table 140 guided in the direction of 0 is moved. One end of a pusher 144 is fixed to the moving table 140 with a bolt 146. The other end of this pushing tool 144 has an external shape according to the cross-sectional shape of the material W, extends from one fixed end, and is inserted into the groove 130. An insertion hole 144a corresponding to the hollow cross section of is bored. Further, a positioning jig 148 having a gap corresponding to the cross-sectional shape of the material is fixed to the tip of the material supply device 4 on an extension of the groove 130. Note that the material supply device 4 is not limited to one that pushes and supplies the material W using the pushing tool 144, but may be one that feeds the material W by holding it between rotating rollers.

Furthermore, a bending device 6 attached to the material supply device 4
As shown in FIG. 7, the left and right guide device 15 is disposed on the base 2 and guides the left and right moving table 150 in the left and right direction perpendicular to the longitudinal direction of the groove 130.
2, and a vertical guide device 15 placed on the left-right moving table 150 that guides the vertical moving table 154 in a direction perpendicular to the longitudinal direction of the groove 130 and the left-right guide direction.
6. Further, the left and right moving table 150 is driven by a left and right motor 158, and the left and right guide driving device 162 that moves the left and right moving table 150 to a predetermined position in the left and right direction via a ball screw 160, and the vertical moving table 154 is driven by a vertical motor 164, A vertical guide drive device 168 that moves to a predetermined position in the vertical direction via a ball screw 166 is provided.

On the other hand, a rotating plate 170 is rotatably supported on the vertically movable table 154.
is rotatably driven by a rotary plate driving device 176 which drives a rotary motor 172 and rotates at a predetermined angle via a gear 174, which is placed on the vertically movable table 154. Further, a first shaft 176 is implanted in the rotating plate 170 in a direction perpendicular to the longitudinal direction of the groove 130, and a first swinging member 178 is rotatably provided around the first shaft 176. It is being The first swing member 178 has a second shaft 180 extending in the longitudinal direction of the groove 130 and in a direction perpendicular to the first shaft 176.
is rotatably supported, and a bending jig 182 in which a gap corresponding to the cross-sectional shape of the material W is formed is fixed to the second shaft. Furthermore, the first swinging member 1
78 at a predetermined angle around the first shaft 176, and a bending jig 182.
A second swing drive device 186 is disposed to swing the shaft at a predetermined angle around a second shaft 180. still,
The bending device 6 is not limited to the one equipped with the positioning jig 148 and the bending jig 182 as in this embodiment, but can also rotate a clamping die around a bending die having a shape according to the bending radius, It may be of a configuration in which the bending process is performed by receiving a bending reaction force using a pressure die.

Next, the electrical system of the bending core insertion device 1 of this embodiment will be explained using the block diagram shown in FIG. The moving motor 52 and the moving encoder 58 are connected to an electronic control circuit 200,
This electronic control circuit 200 includes a well-known CPU 202,
An input/output circuit configured with ROM 204 and RAM 206 as the core of a logic operation circuit and performs input/output with the outside, here, a keyboard input circuit 208, a pulse input circuit 210, a valve drive output circuit 212,
The motor drive output circuit 214 etc. are connected to the common bus 215.
are interconnected through.

The CPU 202 determines the amount of movement of the core metal 46 set by the keyboard 216, for example, the distance R1 from the optoelectronic switch 119 to the tip position of the core metal 46, which is a predetermined bending position shown in FIG.
The distance R2 from the tip of the core metal 46, which is the predetermined bending position shown in the figure, to the shaping position of the shaping device 100 is input via the keyboard input circuit 208, and the pulse signal from the movement amount detection encoder 58 is input as a pulse. Each is input via a circuit 210. On the other hand, these data and signals and ROM20
4. Based on the program and data in the RAM 206, the CPU 202 controls the valve drive output circuit 212.
The brake valve 218 that drives the brake cylinders 64 and 66 and the shaping cylinder 10
Shaping valves 220 and 22 that drive 8 and 110
A drive signal is output to 2 to control the bending core metal insertion device 1.

Next, the processing performed in the electronic control circuit 200 described above will be explained with reference to the flowchart shown in FIG.

First, the main bending core insertion device 1 is powered on together with the material supply device 4 and the bending device 6, and the groove 1 of the fixed guide 124 of the material supply device 4 is turned on.
The material W is put into the container 0, the cylinder 132 is driven, the movable guide 128 is moved, and the fixed guide 124 and the movable guide 128 are brought into close contact with each other. Next, the supply motor 136 is driven, and the push tool 14 is moved together with the moving table 140 via the ball screw 138.
4 is moved in the groove 130 along the groove 130, the material W is pushed out, and the positioning jig 148 is inserted. The material W passed through the positioning jig 148 is passed through the bending jig 182, and as shown in FIG. 162, drive the vertical guide drive device 168 to move the horizontal moving table 15
0. Move the vertically moving table 154 to a predetermined position, and move the bending jig 182 to a predetermined position within a plane orthogonal to the insertion direction of the material W. In addition, the first swing drive device 1
84, drive the second swing drive device 186 to
The swinging member 178 and the bending jig 182 are connected to the first shaft 17
6. Forcibly swing the bending jig 182 by a predetermined angle around the second shaft 180 to tilt the bending jig 182 in the insertion direction of the material W. Furthermore, when the material W is pushed out by the pushing tool 144 and the supply amount b of the material W is reached, the left and right guide drive device 162 and the vertical guide drive device 1
68, the first swing drive device 184 and the second swing drive device 186 are driven, the bending jig 182 is returned to the original position shown in FIG. 8, and the material W is bent to a predetermined bending radius. Ru. In addition, the rotation drive device 176
to rotate the rotating plate 170 and bending jig 1.
82 by a predetermined angle to twist the material W.

During this bending process, a drive signal is output to the moving motor 52 of the moving device 1 via the motor drive circuit 214, the moving motor 52 is driven, the driving sprocket 18 is rotated, and the chain 22, The core bar 46 is inserted into the insertion hole 1 of the pusher 144 along with the moving base 24, the connecting member 28, the connecting member 34, and the connecting plate 44.
44a and moves through the hollow of the material W to a predetermined bending position shown in FIG. 8 near the tip of the positioning jig 148, as shown in FIG. 8 (step 300). . Subsequently, the brake valve 2 is activated via the valve drive output circuit 212.
A drive signal is output to brake cylinder 6.
4 and 66 to move the abutment members 76 and 78, and clamp the connecting member 34 between the abutment members 76 and 78 to activate the brake and prevent the core metal from moving during bending. (Step 305).

Next, the above-described bending process is repeated, for example, the bending process is performed a predetermined number of times, and the tip of the core metal 148 is worn out, and it is determined whether or not the core metal 148 should be shaped (step 310). When it is determined that the core metal 148 should be shaped after the bending process has been performed a predetermined number of times, a drive signal is output to the brake valve 218, and the brake cylinders 64 and 66 are driven in the opposite direction to the movement caused by the processing in step 305. Moving the abutting members 76 and 78, the abutting member 7
The connecting member 34 is released from being held by the connecting members 6 and 78, and the brake is released (step 315).

Next, the moving motor 52 of the moving device 14 is driven until the moving amount detected by the moving amount detection encoder 58 becomes the distance R2 from the predetermined bending position to the shaping position. gold 4
6 is moved backward, and the core bar 46 is moved to the shaping position by the shaping device 100 (step 320). Subsequently, a drive signal is output to the shaping valve 220 via the valve drive output circuit 212, and the shaping cylinder 10 is
8 to move the shaping tool 116 and move the shaping tool 1
16 cuts the tip of the core metal 46 into a predetermined shape, and also outputs a drive signal to the shaping valve 222 to drive the shaping cylinder 110 to remove the shaping tool 1.
18 is moved, and the tip of the core bar 46 is cut and shaped into a predetermined shape (step 330).

Once shaped into a predetermined shape, the moving motor 52 of the moving device 14 is driven to move the core metal 46 forward (step 340). Next, it is determined whether the tip of the core metal 46 has been detected by the photoelectronic switch 119 (step 350). When it is determined that the tip of the core metal has been detected, the next step is to determine whether the amount of movement of the core metal 46 detected by the movement amount detection encoder 58 has reached a preset distance R1 from the photoelectronic switch 119 to the predetermined bending position. (step)
360). That is, it is determined whether the core metal 46 has been moved to the bending position shown in FIG. When it is determined that the valve has moved to the bending position, the driving of the moving device 14 is stopped (step 370), and the valve drive output circuit 2 is stopped.
12, a drive signal is output to the brake valve 218 to drive the brake cylinders 64, 66, move the abutting members 76, 78, and move the abutting members 7
6 and 78 to sandwich the connecting member 34 and prevent the core metal from moving during the bending process (step 6, 78).
380). Once the process of step 380 is executed, this control routine is once terminated, and the processes of step 310 and subsequent steps are repeatedly executed, and when the number of bending operations reaches a predetermined number, the tip of the metal core 46 is shaped again.

Note that the processing in steps 320 and 330 described above works as the shaping control means M6, and the processing in steps 340 to 370 works as the movement control means M7.

As described above, the bending core insertion device 1 of this embodiment moves the tip of the core 46 to the shaping position by the shaping device 100, drives the shaping device 100,
Shape the tip of the core bar 46 (steps 320 and 330),
After shaping, the core metal 46 is moved (step 340), and when the tip of the core metal is detected by the photoelectronic switch 119 (step 350), the core metal 46 is moved from the detected position to a predetermined bending position (step
360, 370).

Therefore, the bending core insertion device 1 of this embodiment
According to , the core metal 4 can be removed without removing the core metal
At the same time, the change in the tip position of the core metal 46 due to the shaping is corrected by detecting the tip position of the core metal 46 with a photoelectronic switch 119. Therefore, the tip of the core bar 46 is always at a predetermined bending position, and proper bending is performed.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments in any way, and it goes without saying that it can be implemented in various forms without departing from the gist of the present invention.

Effects of the Invention As detailed above, the bending core insertion device of the present invention not only shapes the tip of the core without removing the core, but also corrects the position of the tip of the core due to the shaping. As a result, the tip of the core metal can be inserted into a predetermined bending position, and the bending process can be performed appropriately.

[Brief explanation of the drawing]

Fig. 1 is a block diagram illustrating the basic configuration of the present invention, Fig. 2 is a front view of a bending device using the bending core insertion device of the present invention, and Fig. 3 is an enlarged view of the main parts of the moving device. Exploded perspective view, Figure 4 is the same as Figure 2.
AA sectional view, Fig. 5 is BB sectional view of Fig. 2, Fig. 6
The figure is a partially enlarged sectional view of CC in Figure 2, and Figure 7 is a partially enlarged cross-sectional view of CC in Figure 2.
Figure 8 is an enlarged sectional view of DD in Figure 7, Figure 9 is a block diagram showing the configuration of the electrical system of this embodiment, Figure 10 is the core metal insertion performed in this control circuit. 3 is a flowchart showing an example of a control routine. W...Hollow material, M1... Core bar, M2... Moving mechanism, M3... Shaping tool, M4... Shaping mechanism, M5
... Tip detection means, M6 ... Shaping control means, M7
...Movement control means, 1... Core metal insertion device for bending, 14... Movement device, 46... Core metal, 52...
Movement motor, 58...Movement detection encoder,
100... Shaping device, 116, 118... Shaping tool, 119... Photoelectronic switch, 200... Electronic control circuit.

Claims (1)

[Scope of Claims] 1. A moving mechanism that moves a core bar provided to be movable back and forth to a predetermined position, and when bending a hollow material, the moving mechanism moves the core bar to a predetermined bending position of the hollow material. A core metal insertion device for bending that is inserted into a metal core includes: a shaping mechanism that moves a shaping tool that shapes the tip of the core metal, which is provided on a movement path of the metal core; and a tip that detects the position of the tip of the metal core. a detection means; controlling the moving mechanism to move the tip of the core metal to a predetermined shaping position by the shaping mechanism;
a shaping control means for controlling the shaping mechanism to shape the tip of the cored metal; after the shaping, controlling the moving mechanism to move the cored metal, and detecting the tip of the cored metal by the tip detection means; A bending core metal insertion device comprising: movement control means for moving the core metal from the detected position to a predetermined bending position when the core metal is bent. 2. The core metal insertion device for bending according to claim 1, wherein the core metal is made of synthetic resin. 3. The core metal insertion device for bending according to claim 1 or 2, wherein the shaping device includes a shaping tool that moves in a direction perpendicular to the moving direction of the core metal.