JPS62267021A - Bending device - Google Patents

Abstract

PURPOSE:To perform a bending without moving a work or rotating it by driving with the control device in order a bending head, the supporting arm thereof and bending head separating member on the plural bending units arranged at the bending position of a work. CONSTITUTION:Each bending unit M2a...M2z is subjected to a progressive driving from the bending unit M2z apart most from a fixed base M1 and a work W is subjected to bending from the opposite side end part to the fixed base M1. In each bending unit M2a...M2z, a bending head separating member M7 is driven when the bending of the work W by a bending head M5 is completed and the bending head 5 is separated from the work W. This is because of preventing the deformation of the work W with its abutting to the bending head in case of bending the work W by the succeeding bending unit. Consequently the work W is subjected to bending with fixing it to the fixed base M1 without moving it.

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a bending device that automatically bends a rod-shaped or cylindrical workpiece such as a wire rod or pipe to form it into a desired shape. [Prior art] Conventionally, as this type of bending device, for example,
As described in Japanese Patent Application No. 9-159225, there is provided a moving table that grips one end of the workpiece and rotates it around its axis, and a bending head that bends the workpiece at a predetermined angle at the other end. , are used. That is, as shown in FIG.
2 to determine the bending direction of the workpiece, and

[
A bending device is known in which a moving table 74 to which a knock 72 is attached is moved in the axial direction of the workpiece 71 to determine the bending position of the workpiece 71, and a bending head 75 sequentially bends the workpiece 71. There is. [Problems to be Solved by the Invention] However, with this type of device, the workpiece 71 is rotated around its axis to determine the bending direction, so it is not possible to process small-diameter workpieces with poor rigidity. There was a problem. In other words, for small-diameter workpieces with poor rigidity, when the bending process progresses and the workpiece protrudes significantly from the bending head, if the workpiece is rotated using a chuck to change the bending direction, the workpiece will be bent due to centrifugal force due to its own weight. is deformed, making it impossible to mold the workpiece into the desired shape. Therefore, conventionally, when bending such a small-diameter workpiece with poor rigidity, a bending IJ loe jig with a bending die 77 disposed at a predetermined position as shown in FIG. 10, for example, is used. 7B was used to perform the bending process by hand. Therefore, there were problems such as poor workability and low productivity. The present invention has been made for the purpose of providing a bending device capable of satisfactorily bending even small-diameter workpieces with poor rigidity as described above, and improving its productivity. The structure was as follows. (Means for solving the problem, that is, the configuration of the present invention as a means for solving the above problem is as shown in FIG. 1, for example, as shown in FIG. , a fixing base M1 that fixes the workpiece W at a predetermined position, and a plurality of bending units M2a, . A plurality of bending units M2a,..., M2Z,
Bending unit 1-M2 which is farthest from the above fixed table M1
A bending machine for bending the workpiece W into a desired shape, comprising: a drive control device M3 that sequentially controls the drive of the workpiece W to bend the workpiece W into a desired shape; 1 to M2a,..., M2Z,
A bending head M5 that bends the workpiece W along the bending zero M4, and an arm M6 that supports the bending head M5 so that the bending head M5 bends the workpiece in a predetermined direction. , attached to said support arm M6, said bending head M5
a bending head separating member M7 that is separated from the workpiece W by one pair;
The drive control device M3 is connected to each of the bending units yhM.
a bending head driving means M8 for driving the bending head M5 in response to 2a, -, M2z; and a bending head driving means M8 for driving the bending head separating member M7 after driving the bending head M5. The gist of the present invention is a bending device characterized in that it is provided with a separating member driving means M9 that performs the following steps. [In the bending apparatus of the present invention configured as described above, each bending unit M2a,...,'M2Z is a fixed base M]
The bending unit M2Z that is farthest from the workpiece W is sequentially driven, and the workpiece W is bent from the end opposite to the fixed table M1. In addition, each bending unit 1 to M2a,...
, M2Z, when the bending head M5 finishes bending the soak W, the bending head separating member M7 is driven;
The bending head M5 is separated from the workpiece W. This is because after bending the workpiece W, if the bending head is in the position where the bending head is applied to the workpiece W, when the workpiece W is bent by the next bending unit, the workpiece W will take on the bending head and deform. This is to prevent this from occurring.Therefore, the bending load of the present invention [in the device, the workpiece W
When bending the workpiece W, the fixed base M can be used without moving the workpiece W.
The workpiece W will be bent while being fixed at 1. The bending units M2a, . . . , M2Z may be installed only in one direction with respect to the fixed base M1 as shown in FIG. If it is configured to be gripped and placed along the workpiece W on both sides of the fixing base M1, the time required for bending the workpiece W can be further shortened. [Examples] Examples of the present invention will be described below with reference to the drawings. First, FIG. 2 is a schematic plan view showing the entire structure of the bending apparatus of this embodiment. As shown in the figure, the bending device of this embodiment has a fixing table 2 that grips the center of the workpiece 1 and holds it horizontally at a predetermined height position, and the workpiece 1 held on the fixing table 2 is parallel to the fixing table 2. A plurality of bending units 4La are arranged on the rail 3 on the left and right sides of the fixed base 2, respectively.
H2c is applied to ~41Z and 4Ra~4RZ, and the left and right bending units 4La~4Lz and 4Ra~4R7, respectively, and the left and right bending units 1~ are connected to the left and right ends of the rail 3. It is comprised of drive control devices 5L and 5R that sequentially drive and control the bending process from both ends of the workpiece 1. Next, FIG. 3 is a perspective view showing the fixing table 2 and the bending units 4Ra, FIG. 4 is a side view of the fixing table 2, and FIG. 5 is a perspective view showing the bending units 1 to 4Ra. As shown in FIGS. 3 and 4, the fixing table 2 includes a branch 11 for holding the work 1 at a predetermined height, a clamp 12 for holding the work 1, and a rail 3 for holding the fixing table 2. It consists of a pedestal 13 that can be attached freely on the rail 3 in order to fix it in any position on the pedestal 13.
It can be fixed at any position on the rail 3 by the pulled clamp 13a. The clamp 12 that grips the workpiece 1 is composed of a fixed clamper 12a, a movable clamper 12b, and a hydraulic cylinder 12G.
The workpiece 1 can be gripped between it and b. On the other hand, the surface bevelling unit 4Ra has a clamp 21a for fixing the bending units 1 to 4Ra at any position on the rail 3 (bending position of the workpiece 1), as shown in FIGS. 3 and 5. A pedestal 21 is mounted on the rail 3, and a bottom hinge 22 is provided on the pedestal 21.
3, an intermediate link 25 attached to the main link 23 via a clamp 24, and a clamp 26 attached to the intermediate link 25.
Attached through and ahead! 7i: Link 2 to 1 with bending head 27 for bending work 1
It is equipped with 8 and. Main link 23. The intermediate link 25.1-tube link 28 corresponds to the support arm, and the bending head 27 is attached to the bending process IL1 so that the bending direction of the workpiece 1 by the bending head 27 attached to the tip of the top link 28 is fixed in a predetermined direction. It is meant to hold it in place and must be
Its supporting position can be set arbitrarily. That is, elongated holes 23a and 25a are formed in the connecting portion of the main link 23 with the intermediate link 25, and in the connecting portion of the intermediate link 25 with the l-twin printer 28, respectively, and clamps 24 and 26 are used to secure the intermediate link 25 and the top. The positions at which the links 28 are fixed can be set arbitrarily. The bending head 27 is attached to the printers 1 to 28 using a base 30 rotatably attached to the tip of the top link 28 via two top hinges. The center of this base 30 is attached to the top link 28 so as to be able to swing freely.
By driving this swing cylinder 32, the base 30 is rotated around the hinge 29, and the bending head 278 fixed to the base 30 is connected to the workpiece 1 through the hinge 3Qa. It is made to be difficult to let go. Incidentally, the head cylinder 32a of the head cylinder 32 is extended during the bending process, and the bending head 27 is disposed at a position where the bending process of the workpiece 1 is possible, as shown in the figure. Further, the main link 23 is connected to a cylinder rod 34a of a trunnion type cylinder 34 (hereinafter referred to as a remote cylinder) which is swingably attached to the base 21. This H1 interval cylinder 34 is also similar to the neck shooting cylinder 32,
It is a lever for separating the bending head 27 from the workpiece 1, and the cylinder rod 34a is contracted during the bending process.
As shown in the figure, the main link 23 is held vertically. Next, the bending head 27 is fixed to the base 30 via a bending member 1131, and is attached to a bending die 42 for bending the work 1 with a predetermined radius of curvature, and to the base 3o so that it can be freely bent. A pressure mold 43 that presses and fixes the workpiece 1 to the mold 42; a bending arm 44 that is rotatably attached to the base 30 about a bending shaft 41; A press die 45 presses the workpiece 1 against the bending die 42, and hydraulic cylinders 46 and 47 move the press die 43 and the press die 45, respectively (hereinafter referred to as pressure cylinders and push cylinders, respectively). ) and bending arm 4
and a bending motor 4B that rotates the pressure type 43.
The workpiece 1 is pressed with the pressing mold 45, and the bending motor 4
8 is used to rotate the bending arm 44 in the direction of arrow B, the workpiece 1 can be bent along the bending flap 42. A DCC servomorph is used for the bending Tanabata 48, and an angle range is provided so that the rotation angle of the DCC servomorph, that is, the bending angle of the workpiece 1 can be detected. As described above, the bending units 1 to 4Ra include various links 23 for fixing the bending head 27 in a predetermined position,
25, 28, an oscillating cylinder 32 and a separation cylinder 34 for separating the bending head 27 from the workpiece 1, and after bending the workpiece 1 by the operation of the drive control device 5R, which will be described later, can be separated from the workpiece 1. This configuration is exactly the same for the other bending units 1~, but the bending direction is set to be a predetermined direction depending on the installation position, that is, the bending process position of the work 1. . That is, as is clear from FIG. 5, the bending units 1 to 1
In 4R, the bending head 27 is fixed horizontally, and the workpiece 1 is bent horizontally to the left, but in other bending units 1-, for example, as shown in FIG. Main link 23 and intermediate link 25, or intermediate link 25 so that the angle is the desired angle (towards the lower left in the figure)! ~The connection position of the tube link 2B has been adjusted. Next, the drive control devices 51 and 5R are the bending units 1iLa to 41-Z provided on the left and right sides of the fixed base 2, respectively. Bending units 1 to 4LZ at both ends of 4Ra to 4RZ, respectively. 4RZ is used to sequentially bend the workpiece 1 from the bending positions at both ends.
The configuration and operation of the drive control device 5R will be explained by taking as an example the drive control device 5R that drives the. FIG. 7 is a block diagram showing the configuration of the drive control device 5R(7). As shown in the figure, the drive control device 5R controls each bending unit i.
~4Ra ~ 4RZ provided every bending unit 1 4Ra ~ 4Rz neck] Bent cylinder 32° spaced cylinder 34. Pressure type cylinder 46. Push type cylinder 47. and a drive circuit 5La for driving the bending unit 48.
51Z and each of these drive circuits 518 to 51z, and each bending unit 1 to 4 Ra to 4
An input/output port 52 that inputs a detection signal from the angle L sensor 9 which detects the rotation angle (bending angle) of the Cq (pulled into the RZ bending unit 48), and the operator of the device.
Data necessary for bending the workpiece 1, that is, the bending angle and bending process of the workpiece 1] [Input device 53 for inputting start command signals, etc., and various data inputted via the human power device 53 A command signal input boat 54 is used to input the data, and various data input through the command signal input boat 54 and detection signals from the angle sensors 49 of each of the bending units are read, and the processing is performed according to a preset control program. A CPU 5 that executes bending control for the workpiece 1
5, and a ROM 5 in which control programs and various data necessary for executing bending control by the CPU 55 are stored in advance.
6, a RAM 57 from which various data necessary for bending control are temporarily read out by the same CPU 55, and a pass line 58 that connects each of the above parts and serves as a path for various data.
It consists of The bending control executed by the drive control 1ilII device configured as described above will be explained in detail below with reference to the flowchart shown in FIG. It is assumed that the bending angle data at each bending position necessary for bending the workpiece 1 has already been input via the input device 53 and stored in the RAM 57. As shown in the figure, in this bending control routine, step 100 is first executed to determine whether a command signal to start bending has been input, that is, whether the workpiece 1 is attached to the fixed table 2 or not.
It is determined whether or not a command signal for starting bending is input by the driver, and step 100 is repeatedly executed until the bending command signal is input. After this, each bending unit 4. Since the bending head 27 of Ra to 4Rz is separated from the workpiece 1, the operator only has to remove the workpiece 1 which was previously bent from the fixing table 2 and fixing the workpiece before bending to the fixing table 2. Next, step 1 continues when the bending command signal is input.
10 is executed, and the swinging cylinder 3 serves as a bending head separating member provided in each bending unit 4Ra to 4RZ.
2 and the remote cylinder 34 respectively, and each bending process [Units 1 to 4] The bending head 27 of Ra-4R7 is
is placed in a position where it can be bent. Note that this procedure will be explained later. In step 110, each bending unit 1~4Ra~4R
After moving the bending heads 27 of z by one nok position J:, the next step 120 is executed. Swift 120
Now, among the bending angle data of the workpiece 1 of each bending unit 4Ra to 4RZ that has been input in advance and stored in the RAM 57, bending data D at the rightmost bending position that has not been bent yet (at this point) Then, the bending angle data Dz) by the rightmost bending unit 4RZ is read, and the process moves to the next step 130. In step 130, read /υ in step 120 above.
Based on the bending angle data D, the bending heads of the corresponding bending units 1 to 1 are driven and controlled to bend the workpiece 1. The drive control of this bending head corresponds to the above-mentioned bending head driving means M8, and first, the pressure cylinder 46 and the pushing cylinder 47 are driven to press the workpiece 1 against the bending die 42 with the pressure die 43, After the press die 44 is brought into contact with the workpiece 1, the bending motor 48 is driven according to the bending angle data D to move the bending arm 44 1q, and then each cylinder 46 and 47 is returned to its original position. This is done by opening the warp 1, bending it, and then returning the arm 48 to its original position. Also, this bent Tanabata 48! When driving, adjust the angle sensor 1 to avoid bending the work 1 too much.
This is done while checking the rotation angle, that is, the bending angle of the workpiece 1 based on the detection signal from 49. When the bending process of the workpiece] is executed in the SDPCO 30 in this way, the process moves to step 140, where the bending unit (i 1!iQ
The bending head 27 is separated from the workpiece 1 by driving the bender 32 and the separation cylinder 34 to perform a separation process. This process corresponds to the above-mentioned separation section drive bristles M9,
First, the neck cylinder 32 was driven to move the bending head 27 in the direction of arrow C shown in FIG. Thereafter, the separation cylinder 34 is driven to move the main link 23 around the small tom hinge 22 in the direction of the arrow shown in FIG. If the bending head 27 remains in the same position after the processing is completed, the workpiece 1 will be This is because there is a risk that the bending units 4Ra to 4 may hit the bending units and be deformed.
When driving the Rz bending head 27 to a position where the workpiece 1 can be bent, the bending head separating process performed in step 40 and step 1 are performed in the opposite order. That is, first, the separation cylinder 34 is driven to move the main link 23 to the fifth position.
The bending head 27 is positioned vertically as shown in the figure or FIG. 6, and by driving the post-taking cylinder 32, the bending head 27 is placed in a position where the workpiece 1 can be bent. In this way, according to the bending angle data D read in step 120, the work 1 is bent at the corresponding bending position, and the bending head 27 of the bending unit used for the bending is separated from the work 1. Then, step 150 is executed, and the rightmost bending unit 4R is
For the bending unit 4Ra closest to the fixed base 2 from z, it is determined whether the bending of the workpiece 1 at all bending positions has been completed. If the bending process at all bending positions has not been completed, the process moves to step 120 again.C
The bending angle data at the primary bending position is read, and the corresponding bending units i~ are driven and controlled in subsequent processing. Thereafter, the metal bending unit is driven, and when the bending of the workpiece 1 at all bending positions is completed, the process moves to step 100. As explained above, the drive control device 5R is configured using a microcomputer, and sequentially drives the bending units 4Ra to 4RZ installed on the right side of the fixed base 2, starting with the rightmost bending unit 4RZ. Yuki, work 1
Bending process. This configuration is exactly the same for the drive control device 5L that drives and controls the J11 units 4La to 4Lz installed on the left side of the fixed base 2, but the operation is
The difference is that the bending process is performed sequentially from the leftmost bending unit 4 L to Z. As described in detail above, in the bending apparatus of this embodiment, bending units 4La to 4LZ and σ4R are installed at the bending positions of the workpiece 1 on the left and right sides of the fixing table 2 for fixing the workpiece 1, respectively.
a to 4RZ are arranged, and each bending unit is sequentially driven and controlled from both left and right ends. Therefore, the workpiece 1 is bent while being fixed to the fixed table 2, and the workpiece 1 will not be deformed by rotating the workpiece 1, even if it is a small diameter workpiece with poor rigidity. It becomes possible to perform bending processing, and the productivity can be improved. In addition, rail 3 is attached to the fixed stand and each bending unit 1.
It can be installed at any position on the workpiece 1.
Since the bending direction of the bending direction can be adjusted, even workpieces having different shapes can be bent well. In this embodiment, a cylinder is used as the bending head separating member, but it can also be realized using a motor. Further, although a small DC motor is used as the bending motor, a step motor may also be used. In this case, an angle sensor for detecting the rotation angle is not required. [Effects of the Invention] As detailed above, according to the bending device of the present invention, the workpiece can be fixed to the fixed table without moving or rotating in the axial direction as in conventional devices. This allows the workpiece to be bent into a desired shape. Therefore, even a small-diameter workpiece with poor rigidity can be bent into a desired shape, and its productivity can be improved. 4. Figure 1 is a block diagram showing the structure of the present invention, Figures 2 to 8 show an embodiment of the present invention, and Figure 2 (a bending diagram of the embodiment of the present invention). J plan view schematically showing the configuration of the entire processing equipment;
FIG. 3 is a perspective view showing the fixed base 2 and bending units 1 to 4 Ra, FIG. 4 is a side view of the fixed base 20, and FIG. 5 is a right side view showing the bending units 1 to 4 Ra. The figure is a right side view of the bending unit 1 installed in the bending unit 1~ = IRQ and tit, the bending direction of the workpiece 1 is different, and Figure 7 shows the configuration of the drive control device 5R. Figures 9 and 8 are flowcharts showing the bending control executed by this drive control device 5R; It is an explanatory diagram showing a conventional bending jig used when bending. W, 1... Work Ml, 2... Fixing base M2a, M2z, 4La, 4Lz, 4Ra, 4RZ...
・Bending] Two units M3.5m, 5R... Drive control device M4.42... Bending die M5.27... Bending head M6... Support arm Ml... Bending head separation member M8...・Bending head drive means M9...Separation member drive means 23...Main link 25...Intermediate link 2B...Twin link 32...Portrait cylinder 371...Separation cylinder

Claims (1)

[Claims] A fixing table that grips a rod-shaped or cylindrical workpiece and fixes the workpiece in a predetermined position; and a plurality of fixing tables that are respectively disposed at bending positions of the workpiece and bend the workpiece. a bending unit; and a drive control device that sequentially drives and controls the plurality of bending units, starting from the bending unit that is farthest from the fixing table, to bend the workpiece, and bends the workpiece as desired. A bending device that bends the workpiece into a shape, wherein each of the bending units comprises: a bending head that bends the workpiece along a bending die; and a direction in which the workpiece is bent by the bending head in a predetermined direction. and a bending head separating member that is attached to the support arm and separates the bending head from the workpiece, and the drive control device is connected to each of the bending units. Correspondingly, the bending head driving means drives the bending head, and the separating member driving means drives the bending head separating member after driving the bending head with the bending head driving means. Bending processing equipment.