Pipe bending device

Abstract

To improve productivity.SOLUTION: A pipe bending device 100 includes: a processing unit 10 that performs bending of a pipe 50; a three-dimensional measurement instrument 20 that measures a shape of the pipe 50 after the bending processing is performed by the processing unit 10; a calculation unit 32 that calculates a correction value for the bending processing from an amount of deviation between shape data of the bent pipe 50 acquired from the three-dimensional measurement instrument 20 and design data for the bending processing performed on the pipe 50; and a processing control unit 34 that controls the processing unit 10 on the basis of the correction value for the bending processing to perform the bending processing.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a pipe bending device. [Background technology]

[0002] A bending device is known that measures the bent flange length and bend angle of a workpiece that has undergone trial bending using a vernier caliper or the like, inputs the measured values ​​into an NC (Numerical Control) device, and the NC device calculates a correction amount from the measured values ​​and target values ​​(for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2002-28727 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the method described in Patent Document 1, an operator measures the bent flange length and bend angle of a test-bent workpiece using a vernier caliper or the like, so there is room for improvement in terms of productivity.

[0005] The present invention has been made in consideration of the above problems, and has an object to improve productivity. [Means for solving the problem]

[0006] The present invention is a pipe bending apparatus comprising a processing unit that performs bending processing on a pipe, a three-dimensional measuring device that measures the shape of the pipe after bending processing has been performed by the processing unit, a calculation unit that calculates a correction value for the bending processing from the amount of deviation between shape data of the pipe after bending processing obtained from the three-dimensional measuring device and design data for the bending processing to be performed on the pipe, and a processing control unit that controls the processing unit based on the correction value for the bending processing to perform the bending processing. Effect of the Invention

[0007] According to the present invention, productivity can be improved. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1(a) is a block diagram of a pipe bending apparatus according to an embodiment, FIG. 1(b) is a top view showing an example of pipe bending by a processing unit in the embodiment, and FIG. 1(c) is a front view seen from direction A in FIG. 1(b). [Diagram 2] 2(a) to 2(d) are diagrams showing an example of a process of bending a pipe by the processing unit in the embodiment. [Diagram 3] FIG. 3 is a flowchart showing an example of control of a pipe bending process by the control unit in the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings. EXAMPLES

[0010] FIG. 1(a) is a block diagram of a pipe bending apparatus 100 according to an embodiment. As shown in FIG. 1(a), the pipe bending apparatus 100 includes a processing unit 10, a three-dimensional measuring device 20, a control unit 30, and a storage unit 40. The processing unit 10 performs bending on a pipe. The bending in this embodiment includes twisting in addition to two-dimensional bending. The three-dimensional measuring device 20 measures the three-dimensional shape of the pipe after bending by the processing unit 10. The three-dimensional measuring device 20 may be a contact type or a non-contact type, or may be a combination of a contact type and a non-contact type. The control unit 30 includes a calculation unit 32 and a processing control unit 34. The calculation unit 32 acquires three-dimensional shape data of the pipe after bending from the three-dimensional measuring device 20, and calculates a correction value for bending from the amount of deviation between the acquired shape data and design data for bending to be performed on the pipe. The design data for bending is stored in, for example, the storage unit 40. The processing control unit 34 controls the processing unit 10 using the design data for bending to perform bending on the pipe, and after the calculation unit 32 calculates a correction value, controls the processing unit 10 using the design data and the correction value to perform bending on the pipe. The control unit 30 is a processor such as a CPU (Central Processing Unit). The calculation unit 32 and the processing control unit 34 may function by the same processor or different processors. The storage unit 40 may be a non-volatile semiconductor memory such as a flash memory.

[0011] Fig. 1(b) is a top view showing an example of bending of a pipe 50 by the processing unit 10 in the embodiment, and Fig. 1(c) is a front view seen from the A direction in Fig. 1(b). As shown in Fig. 1(b) and Fig. 1(c), for example, the pipe 50 is subjected to two-dimensional bending processing and is bent in a region 60. If the portions before and after bending are portions 61 and 62, and the axes of portions 61 and 62 are A and B, respectively, the A axis is inclined at an angle α with respect to the B axis. In this embodiment, the angle α between the A axis and the B axis is defined as the bending angle α.

[0012] The portion 62 has a predetermined length, and the portion 63 at the end of the portion 62 is subjected to twist processing and two-dimensional bending processing. If the axis of the portion 63 is the C axis, the C axis intersects with the B axis and extends in a direction different from the A axis. In this embodiment, the distance L between the intersection 64 where the B axis intersects with the A axis and the intersection 65 where the B axis intersects with the C axis is the feed amount L. In addition, in a case where the intersection of the two axes is only on one side and the other side is the end of the pipe 50, the distance between the intersection of the two axes and the end face of the pipe 50 is the feed amount. In addition, a plane 66 passing through the A axis and the B axis intersects with a plane 67 passing through the B axis and the C axis, and the angle β between the plane 66 and the plane 67 is the twist angle β in this embodiment.

[0013] The three-dimensional measuring device 20 in Fig. 1(a) measures the three-dimensional shape of a pipe 50 after bending as shown in Fig. 1(b) and Fig. 1(c), for example. The calculation unit 32 calculates the bending angle α, feed amount L, and / or twist angle β shown in Fig. 1(b) and Fig. 1(c) from the shape data of the pipe 50 after bending obtained from the three-dimensional measuring device 20, and calculates a correction value for bending from the deviation between these values ​​and the design data.

[0014] 2(a) to 2(d) are diagrams showing an example of a process of bending a pipe 50 by the processing unit 10 in the embodiment. In FIG. 2(a) to 2(c), the diagrams located at the upper side are top views of the pipe 50, and the diagrams located at the lower side are front views seen from the A direction. FIG. 2(d) is a top view of the pipe 50. As shown in FIG. 2(a), when the pipe 50 is supplied to the pipe bending apparatus 100, the pipe 50 is subjected to a two-dimensional bending process using the bending die 70. As a result, a portion 61 and a portion 62 bent at a bending angle α are obtained. As shown in FIG. 2(b), the pipe bending apparatus 100 performs a twist process on the pipe 50 so that the twist angle is β. As shown in FIG. 2(c), the pipe bending apparatus 100 feeds the pipe 50 forward at a feed amount L. As shown in FIG. 2(d), the pipe bending apparatus 100 performs a two-dimensional bending process on the pipe 50 using the bending die 70. As a result, the distance between an intersection 64 of the A axis and the B axis and an intersection 65 of the B axis and the C axis becomes the feed amount L. As a result of the above, a bent pipe 50 as shown in Figures 1(b) and 1(c) is obtained.

[0015] Fig. 3 is a flow chart showing an example of control of bending of a pipe 50 by the control unit 30 in the embodiment. As shown in Fig. 3, the processing control unit 34 controls the processing unit 10 to perform bending of the supplied pipe 50 (step S10). In step S10, bending of the pipe 50 is performed using the design data stored in the storage unit 40.

[0016] Next, the calculation unit 32 acquires from the three-dimensional measuring device 20 three-dimensional shape data of the pipe 50 after bending measured by the three-dimensional measuring device 20 (step S12). Next, the calculation unit 32 calculates processing values ​​of the bending from the shape data of the pipe 50 acquired from the three-dimensional measuring device 20 (step S14). For example, as shown in Figures 1(b) and 1(c), the calculation unit 32 calculates the A-axis, B-axis, and C-axis from the shape data, and then calculates the bending angle α, the feed amount L, and the twist angle β.

[0017] Next, the calculation unit 32 calculates a correction value for the bending process from the deviation between the processing value calculated in step S14 and the design data stored in the storage unit 40 (step S16). For example, if the calculated bending angle is α1 and the bending angle in the design data is α2, (α2-α1) is calculated as the correction value for the bending angle. Similarly, if the calculated feed amount is L1 and the feed amount in the design data is L2, (L2-L1) is calculated as the correction value for the feed amount. If the calculated twist angle is β1 and the twist angle in the design data is β2, (β2-β1) is calculated as the correction value for the twist angle.

[0018] Next, the processing control unit 34 controls the processing unit 10 based on the bending correction value to perform bending on the newly supplied pipe 50 (step S18). That is, the processing control unit 34 controls the processing unit 10 to perform bending on the pipe 50 after taking into account the correction value calculated in step S16 to the design data stored in the memory unit 40.

[0019] Next, the machining control unit 34 judges whether machining is to be ended (step S20). If machining is to be continued (No), the process returns to step S12. If machining is to be ended (Yes), the process ends.

[0020] As described above, according to the embodiment, the calculation unit 32 calculates the bending correction value from the deviation between the shape data of the pipe 50 after bending obtained from the three-dimensional measuring device 20 and the design data of the bending to be performed on the pipe 50 (steps S12 to S16). The processing control unit 34 controls the processing unit 10 based on the bending correction value calculated by the calculation unit 32 to perform the bending (step S18). As a result, even when a three-dimensional bending process is performed on the pipe 50, the processing value of the pipe 50 is automatically calculated without the operator measuring the processing value of the pipe 50 after bending using a caliper or the like, and the bending correction value is automatically calculated from the deviation between the processing value and the design value, thereby improving productivity. In addition, by repeatedly performing steps S12 to S18, the state of the immediately preceding bending process can be fed back to the next bending process, so that the fluctuation of the bending process can be suppressed.

[0021] In addition, in an embodiment, part assembly and part welding (e.g., brazing) of the pipe 50 that has been bent may be performed between steps S10 and S12 in Figure 3, and then step S12 may be performed on the pipe 50 that has been bent.

[0022] Although the embodiments of the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and various modifications and variations are possible within the scope of the gist of the present invention described in the claims. [Explanation of symbols]

[0023] 10... processing unit, 20... three-dimensional measuring device, 30... control unit, 32... calculation unit, 34... processing control unit, 40... memory unit, 50... pipe, 60... area, 61... portion, 62... portion, 63... portion, 64... intersection, 65... intersection, 66... ​​plane, 67... plane, 70... bending mold, 100... pipe bending device

Claims

[Claim 1] A processing section for bending pipes; a three-dimensional measuring device for measuring a shape of the pipe after bending is performed by the processing unit; a calculation unit that calculates a correction value for bending based on a deviation between shape data of the pipe after bending obtained from the three-dimensional measuring device and design data of the bending to be performed on the pipe; a processing control unit that controls the processing unit based on the correction value for the bending process to perform the bending process.

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