JP2628669B2 - Welding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a welding apparatus for manufacturing a box from a welded object, particularly a small thin plate.

(Prior Art) In recent years, in the sheet metal industry for thin sheets, automation of cutting processing, drilling processing, bending processing and the like and intelligent thinking have been established, and the rationalization thereof has been rapidly developing.

However, the welding process is always refrained from the cutting, drilling, bending and other processes. The rationality of the welding process is considerably behind that of the cutting, drilling, and bending processes in the preceding process, and is mostly performed by an operator.

(Problems to be Solved by the Invention) By the way, the above-described conventional welding operation itself often depends on the experience and intuition of the operator, and requires skill. For this reason, it is difficult to rationalize welding work, and finishing man-hours are required. In addition, there is a problem of processing due to generation of distortion and a problem of product variation due to individual differences of workers.

In addition, the selection of welding conditions for welding is performed each time the material, plate thickness, and joint shape of the workpiece change, with the operator relying on experience and intuition while performing trial melting each time. Therefore, it took a very long time to select welding conditions and was inefficient.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a welding device that selects an optimum welding condition efficiently and performs welding on an object to be welded in a very short time without depending on the experience and intuition of an operator. To provide.

[Structure of the Invention] (Means for Solving the Problems) The present invention has been made in view of the conventional problems as described above, and the invention according to claim 1 is directed to welding a joint of an object to be welded. An axis control unit for controlling the movement of the torch to be performed, a power supply control unit for controlling the welding power source, a condition selection file storing a plurality of joint shapes of the workpiece, and a plurality of the condition selection files described in the condition selection file. A torch position arithmetic processing device for calculating a torch position with respect to the welded portion of the workpiece based on the joint shape selected from the joint shape and the plate thickness input from the input device; and a torch position arithmetic processing device. The optimum welding condition data memory that stores the optimum welding condition data that is selected based on the torch position, joint shape, plate thickness and material of the work to be welded. Processing A machining program memory for storing grams, is made comprising a.

The invention according to claim 2 is the invention according to claim 1, further comprising a program storage memory for storing a machining program used for welding of the workpiece with a program number attached thereto. .

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 9, the frame 3 in the horizontal automatic welding machine 1 as a welding device includes a lower frame 3A, a main body frame 3B, a support frame 3C, and an upper frame 3D. An opening 5 is formed in front of the main body frame 3B.

A welding power source 7 and a pneumatic three-point set unit 9 are provided in the main body frame 3B. Further, a control device 13 for controlling the horizontal automatic welding machine 1 via a bracket 11 is mounted on a side portion of the main body frame 3B upward.

The main body frame 3B is provided with a work clamp for clamping a work as an object to be welded, and one end of a backing holder 17 provided with a backing mold 15 is provided at a front portion of the main body frame 3B with a hinge 19. It is mounted so as to be swingable with a fulcrum as a fulcrum. At the time of use, the inside of the opening 5 is swung from the lower standby position to be held and locked at the reference position where the posture is in a horizontal state.

At a suitable height position between the support frame 3C and the main body frame 3B, a support member 31 is attached so as to extend in the Y-axis direction, and a plurality of sub-support devices 23 are swingably pivoted on the support member 21. Supported.

The sub-support device 23 is used when welding the bottom welding portion of the box. When the sub-support device 23 is used, first, the backing holder 17 is swung from the horizontal state to be positioned at the lower standby position, and then the sub-support device 23 is swung from the lower standby position to the upper use position. It is set at the reference position and is securely locked.

A cover member 27 having a U-shaped opening 25 is provided on the upper frame 3D.
27 can be moved in the X-axis, Y-axis and Z-axis directions through the opening 25
An X, Y, Z axis unit 29 is provided. The X, Y, Z-axis unit 29 is provided with a torch unit 33 having a torch 31, and the torch unit 33 is vertically movable in the Z-axis direction.

An argon gas cylinder 35 containing argon gas as a welding use gas ejected from the torch 31 is provided behind the main body frame 3B, and the argon gas cylinder 35 is connected to the torch 29 via a torch cable 37. Have been. In order to hold the torch cable 37, a holding bracket 39 is attached to a rear portion of the main body frame 3B.

With the above configuration, the workpiece to be welded is placed on the backing mold 15 attached to the backing holder 17, and the workpiece is clamped from above by the work clamp. Next, argon gas is sent from the argon gas cylinder 35 to the torch 31 via the torch cable 37, and the argon gas is ejected from the torch 31 to the welding line of the workpiece. The torch 31 controls the X-, Y-, and Z-axis units 29 and is controlled in the Y-axis direction to be welded along the welding line of the workpiece.

FIG. 1 is a block diagram showing a control configuration of the control device 13. As shown in FIG.

In FIG. 1, an input / output device 43, such as a keyboard with a CRT, for inputting or displaying the material, plate thickness, joint shape, and the like of a workpiece to be welded through an I / O to a CPU 41 of the control device 13 is provided. Is connected. I / F for CPU41
A mode selection switching circuit 45 is connected to the mode selection switching circuit 45, and a mode selection section 47 is connected to the mode selection switching circuit 45.

The mode selector 47 is, as shown in FIG.
It consists of a switching knob 47A and a pointer 47B for switching to five scales of program, test, edit, execution and origin. For example, the mode of the program is selected by turning the switching knob 47A to adjust the pointer 47B to the scale of the program.

A power controller 49 is connected to the CPU 41 via an I / F, and the welding power source 7 is connected to the power controller 49. The torch 31 is connected to the CPU 41 via the I / F on the X axis and the Y axis.
Axis, each axis control unit 51 for controlling in the Z axis direction is connected,
A position detector 53 for detecting the position of the torch 31 moved in the X-axis, Y-axis and Z-axis directions is connected to each of the axis controllers 51.

A torch position arithmetic processing device 55 is connected to the CPU 41, and the torch position arithmetic processing device 55 has a CP of a workpiece thickness and a joint shape set in advance from the input / output device 43.
Captured via U41. That is, FIG.
As shown in (D), there are four types of joint shapes.

Third, as shown in (A) of the figure, upward in the Z-axis direction of point O where each corner has each other pick welded object W ₁ and welded object w2 of the same thickness t (vertical direction) The position separated by 1 calculated by the above is the torch position of the torch 31. Optimally, welding is performed while controlling the position of the torch at a substantially constant position. Figure 3 of as indicated by (B), butt-welded object W ₂ and welded object W ₁ of the same thickness t, the upper in the Z-axis direction of the corner point O of the object to be welded W ₁ (vertical direction) What The position separated by 1 calculated as above is the torch position of the torch 31. It is preferable to perform welding while controlling the position of the torch at a substantially constant position.

Further, as shown in the FIG. 3 (C), butt and welded object W ₁ and the object to be welded W _2, Z from the corner point O of the object to be welded W ₂
Upward in the axial direction (vertical direction) Away from the vertical and to the right in FIG. 3 (C). The position that is just apart is the torch position. It is preferable to perform welding while controlling the torch position of the torch 31 at a substantially constant position. Furthermore, as shown in the FIG. 3 (D), the top to l = 2t apart position of the weldment W ₁ and the weld object W ₂ butt Z-axis direction from the corner point O (vertical direction) Torch 31 torch position. It is preferable to perform welding while controlling the position of the torch at a substantially constant level.

In this way, the optimum torch position 1 in the case of the joint shape as shown in FIGS. 3 (A) to 3 (D) is calculated by the torch position calculation processing device 55. (However, (C) in FIG. 3
Then, the value of a is also added. The torch position 1 thus calculated by the torch position calculation processing device 55 and the material, plate thickness and joint shape input from the input / output device 43 are stored in the optimum welding condition data memory 57 connected to the CPU 41. Be included. As shown in FIG. 4, the optimum welding condition data memory 57 stores the optimum welding condition data based on experience and actual measurement values. Fig. 4 shows materials such as SPC, SUS, Al, etc., 0.5-23mm
And the optimum welding conditions based on the joint shapes shown in FIGS. 3A to 3D are stored in advance. Items of the optimum welding conditions include the torch position, initial current, initial current time, preflow, upslow time, pulse current, and base current obtained in FIGS. 3A to 3D. Data based on experience and experimental values are stored.

Therefore, the material, plate thickness, joint shape, and torch position obtained in FIGS. 3A to 3D of the work to be welded are input to the optimum welding condition data memory 57 from the input / output device 43. As a result, appropriate optimum welding conditions are automatically selected. The sample melting condition temporary memory 59 is connected to the CPU 41, and the sample melting condition temporary memory 59
In FIG. 5, the optimum welding conditions selected from the optimum welding condition data memory 57 are temporarily stored in an optimum welding condition list as shown in FIG. Temporary storage conditions
The list of optimum welding conditions stored in 59
Display on the T screen. Then, in FIG. 2 of the mode selecting section 47, the mode is switched from the program to the test, and the weld is subjected to the trial melting at least once. When the optimum welding conditions are partially edited in this trial melting, the mode is switched from test to edit by the mode selecting section 47 shown in FIG.

Next, the mode is switched from editing to execution by the selection unit 47 in the mode shown in FIG. 2, and the edited optimum welding conditions are loaded into the processing program stored in the processing program memory 61 connected to the CPU 41. Thus, welding is performed on the portion to be welded.

And the used machining program is machining program N
The program is stored in the program storage / memory 63 connected to the CPU 41 with o. In other words, this program storage
As shown in FIG. 6, the program No. is assigned to the memory 63, and the optimum welding conditions actually subjected to the welding processing are stored. Therefore, when the workpiece is again welded with the same material, thickness and joint shape, the program is stored and stored without using the optimum welding condition data stored in the optimum welding condition data memory 57. The program number stored in 63 can be selected and used.

A condition selection file 65 is connected to the CPU 41. In the condition selection file 65, for example, respective files in operation when the optimum welding conditions are selected are shown as shown in FIGS. 7A to 7E. As an operation example of selecting the optimum welding conditions, for example, the file shown in FIG. 7A from the condition selection file 65 is displayed on the CRT screen of the input / output device 43. The worker is the seventh
While viewing the file shown in (A) of the figure, a preset material, plate thickness and joint shape are input. After inputting the preset material, plate thickness and joint shape, the file shown in FIG. 7 (B) is displayed on the CRT screen, and the operator selects the welding method from continuous, tack and arc spot. Then, for example, when continuous is input, a file is displayed on the CRT screen as shown in FIG. 7 (C). Then, the operator inputs the welding length.

When a tack is input from the welding method shown in FIG. 7B, the file shown in FIG. 7D is displayed on the CRT screen. While looking at (D) in FIG. 7, the starting point size S ₁ , welding length L ₁ , starting point size S ₂ and welding length L ₂ are input.

When an arc spot is input from the welding method shown in FIG. 7B, a file is displayed on the CRT screen as shown in FIG. 7E. While referring to FIG. 7E, a starting point size S, a pitch P, and a dot number C are input. By performing this operation, the optimum welding conditions described above are selected.

FIG. ₈ is a flow chart showing the welding process for the work to be welded in order to find the optimum welding conditions. In FIG. ₈ , in step 67, the mode of the mode selecting section 47 is set in the program, and the material, plate thickness and joint means of the work to be welded are set in the manner described in FIGS. 7 (A) to 7 (E). Input from the input / output device 43 based on the input / output device. Step 69
As shown in FIGS. 3A to 3D, the torch position calculation processing device 65 performs a torch position calculation process based on the plate thickness and the joint shape input by the switch 67. In step 71, the determined torch position, material, plate thickness, and joint shape are stored in the optimum welding condition data memory 57.
The optimum welding condition is selected from the optimum welding condition data memory 57.

After the selected welding condition is stored in the temporary melting condition temporary / memory 59 in step 73, the mode of the mode selecting section 47 is switched from the program to the test to perform the trial melting. afterwards,
The welding condition list shown in FIG. 5 is displayed on the CRT screen of the input / output device 43. In step 75, while checking the welding condition list displayed on the CRT screen of the input / output device 43, it is determined whether or not editing and correction are to be performed. Is switched to editing, and editing and correction are performed in step 77, and the process is returned to before step 73.

If it is determined in step 75 that there is no need to perform editing and correction, the flow advances to step 79 to load the optimum welding conditions into the machining program memory 61, and then switch the mode of the mode selection unit 47 from edit to execution. In step 81, welding is performed on the welded portion based on the processing program, and when the welding is completed, in step 83, the processing program is assigned a No. and stored in the program storage memory 63, and the processing ends. .

As described above, the torch position and the optimum welding conditions are automatically selected based on the preset material, plate thickness, and joint shape, and the workpiece can be subjected to welding under the conditions. Therefore, the most efficient welding conditions can be selected in a very short time without relying on the experience and intuition of the operator.
In addition, welding can be easily performed.

The present invention is not limited to the above-described embodiment, but can be embodied in other forms by making appropriate changes.

[Effects of the Invention] As can be understood from the above description of the embodiment, in short, the invention according to claim 1 includes a control unit (51) for controlling the movement of a torch for welding a joint of a workpiece, A power supply control unit for controlling a welding power source, a condition selection file (65) storing a plurality of joint shapes of the workpiece, and a plurality of joint shapes stored in the condition selection file (65) are selected. A torch position arithmetic processing device (55) for arithmetically processing a torch position with respect to a welded portion of a workpiece based on a joint shape and a plate thickness input from an input device (43), and the torch position arithmetic processing device (55) The optimum welding condition data memory (57), which stores the optimum welding condition data selected based on the torch position, joint shape, plate thickness, and material of the work to be calculated, Machining professional for welding Machining program memory for storing a ram (61)
And is provided.

According to a second aspect of the present invention, there is provided a program storage memory (6) for storing a machining program used for welding an object to be welded with a program number attached thereto according to the first aspect of the invention.
3).

With the above configuration, in the present invention according to claim 1,
When a required joint shape is selected from a plurality of joint shapes stored in the condition selection file 65 and a plate thickness is input, a torch position is calculated in the torch position calculation processing device 55, and the torch position, the joint shape and the plate thickness are calculated. The optimum welding condition is selected from the optimum welding condition data memory 57 based on the material and the material, and the processing program incorporating the optimum welding condition is stored in the processing program memory 61.

Therefore, according to the present invention, it is only necessary to select the joint shape of the workpiece from the condition selection file 65 and input the thickness and material of the workpiece from the input device. Can be easily performed.

In the present invention according to claim 2, since the program storage memory 63 for storing a machining program used for welding is provided, when the welding of the workpiece under the same conditions is performed again, the program is stored. It is stored in the storage memory 63. The machining program can be used again as it is, and in the case of re-welding, the welding operation can be started quickly.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a control configuration in a control device for a welding machine according to the present invention, FIG. 2 is a diagram showing an example of a mode selection unit, and FIGS. FIG. 4 is an explanatory diagram illustrating a calculation process of a torch position calculation device. FIG. 4 shows an example of final welding condition data stored in the optimum welding condition data memory. FIG. 5 is an example of a list of optimum welding conditions stored in the temporary melting condition memory.
FIG. 6 shows an example of a program file stored in the program storage / memory. (A) to (E) of FIG.
Is an example of a file stored in each condition selection file. FIG. 8 is a flowchart for explaining the operation of the present invention, and FIG. 9 is a perspective view showing an example of a horizontal automatic welding machine as a welding apparatus embodying the present invention. DESCRIPTION OF SYMBOLS 1 ... Horizontal automatic welding machine, 13 ... Control device 31 ... Torch, 41 ... CPU 43 ... Input / output device, 47 ... Data selection part 49 ... Power supply control part, 51 ... Each axis control part 55 …… Torch position calculation processor 57 …… Optimal welding condition data memory 59 …… Program storage memory

Claims (2)

(57) [Claims] An axis control unit (51) for controlling the movement of a torch for welding a joint of a workpiece, a power control unit for controlling a welding power source, and a plurality of joint shapes of the workpiece are stored. The condition selection file (65) and the condition selection file (6
5) A torch position calculation processing device for calculating a torch position with respect to a welded portion of a workpiece based on a joint shape selected from a plurality of joint shapes stored in 5) and a plate thickness input from the input device (43). 55), and optimum welding condition data storing the optimum welding condition data selected based on the torch position, the joint shape, and the plate thickness and material of the work to be welded calculated by the torch position calculation processing device (55). Memory (57),
A welding program memory, comprising: a machining program memory (61) for storing a machining program for performing welding of a welded portion of a workpiece. 2. A machining program according to claim 1, wherein the machining program used for welding of the workpiece is a program number.
A welding device, comprising: a program storage memory (63) for storing the program with a mark.