JPH0871752A - Wrapping tube and inspecting device of welding position thereof - Google Patents

Abstract

PURPOSE: To rationalize the inspection by providing a notch in the end part which is the tube joint of an original sheet of a tube, forming an inspection hole for the confirmatory inspection of the fitting direction in welding the tube to an arm simultaneously with the wrapping to make the tube in manufacturing the wrapping tube of a suspension member for an automobile. CONSTITUTION: A semi-circular notch 1b is provided at the respective center position of one side of a sheet 1a to be formed in a wrapping tube and of the other side opposite thereto. Wrapping is achieved to make the wrapping tube 1 so that an inspection hole 1B may be formed by matching these notches 1b. The confirmatory inspection of the fitting direction when the wrapping tube 1 is fitted to an arm and welded thereto is carried out using an optical means. The light quantity irradiated from a light emitting element outside the wrapping tube 1 through the inspection hole 1B is detected by a light receiving element provided inside the tube 1 to judge the presence/absence of an abnormality.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wound pipe and an inspection apparatus for welding the wound pipe, and more particularly to a wound pipe used for a boss of an arm of a vehicle suspension and a welding position for welding the arm and the boss. Inspection equipment.

[0002]

2. Description of the Related Art A suspension arm for linking a wheel and a vehicle body is used for a suspension of an automobile. The boss 51 of the suspension arm 62 is welded and joined to the arm 62.

Conventionally, a winding pipe 51 made by winding a flat plate 51a as shown in FIG. 9 on the boss has been used.

This winding pipe is used as a boss 51 for the arm 6
In order to weld 2 to 2, the seam of the winding pipe 51 needs to be positioned to weld to the suspension arm 62. Therefore, at the time of manufacturing, as shown in FIG.
When the operator sets the winding pipe 51 at the second seam position mark 53 so that the seam of the pipe is visually observed, and when the set button 59 is pressed, the winding pipe 51 is clamped and the arm 62 and the winding pipe 51 are welded. It was like this.

[0005]

The conventional wound pipe has the following problems.
Since the operator visually aligns the seam position,
Due to operator's mistake, set the seam position by mistake,
There was the inconvenience that it could be welded to the arm as it was.

Therefore, after the welding, another inspector needs to inspect the joint position and remove the defective product from the product.

Since the defective product has been welded, it cannot be corrected and must be discarded.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to improve the disadvantages of the conventional example, and more particularly, to provide a winding pipe in which the direction of the seam to be welded is easily inspected and an inspection device capable of surely inspecting the welding position of the pipe. The purpose is to provide.

[0009]

Therefore, in a wound pipe manufactured by winding a flat plate, a cutout portion is provided at each central position of one side of the flat plate and the other side facing this side, and the cutout portion is provided. The winding pipe has a structure in which it is wound so as to generate an inspection hole by being combined with each other.

Also, based on the winding pipe, a light receiving element installed in the winding pipe and responsive to irradiation from the inspection hole, a light emitting element for irradiating the light receiving element through the inspection hole, and an output from the light receiving element. The welding position inspection device for a wound pipe is provided with a control means for detecting an abnormality in the position of the seam of the wound pipe. The present invention aims to achieve the above-mentioned object by these.

[0011]

The notch at the center of each side of the flat plate and the side facing this side forms an inspection hole by winding the flat plate. The inspection hole is set to a size that does not affect the strength of the winding pipe and allows the light from the light emitting element to pass inside.

Further, in the inspection device for the welding position of the wound pipe, the light emitting element irradiates the light receiving element through the inspection hole during its operation. When the joints of the pipes are correctly installed during welding, the light from this light emitting element reaches the light receiving element through the inspection hole. The light receiving element outputs a signal to the control means in response to the irradiation from the inspection hole. When the control means receives the signal indicating that the light has been received, the control means determines that the pipe is normally installed. On the other hand, when the signal is not received, it means that the inspection hole does not face the predetermined direction, and therefore it is determined that the direction of the seam of the winding pipe is abnormal.

[0013]

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing the appearance of a wound pipe according to this embodiment. As shown in FIG. 1A, the flat plate 1
The a has a notch portion 1b at the center position of each of its one side and the side facing this side. Furthermore, FIG.
As shown in (b), the cutout portion 1b creates an inspection hole 1B by being assembled by winding. In this embodiment, a semi-circular cutout is formed in the center of each of the edges that serve as a seam when the flat plate 1a is wound, and winding is performed. This creates a circular hole in the center of the seam. Since this circular hole is used for inspection, it is referred to as inspection hole 1B here.

FIG. 2 is a view showing a part of the suspension.
FIG. 2A is a rear view and FIG. 2B is a top view. Winding pipe 1 according to this embodiment on this suspension
Is used. Boss 1 of suspension arm 12
The wound pipe 1 used as is welded to the suspension arm 12. At this time, welding is required so that the seam 1A of the winding pipe 1 comes to the suspension arm 12 side.

FIG. 3 is a view showing a suspension arm,
FIG. 3A is a plan view, and FIG. 3B is a side view. 4A is a sectional view taken along the line AA shown in FIG. 3, and FIG. 4B is a sectional view taken along the line BB. FIG.
A winding pipe 1 which is a boss 1 is fixed to one end of the by welding. The joint portion 1A of the boss 1 is welded so as to come into the boss fixing portion 12A of the suspension arm 12 due to the strength and the like. Therefore, the boss fixing portion 12A
On the other hand, the welding position must be adjusted so that the boss seam 1A is within 30 [degrees].

FIG. 5 is a view showing an inspection device for welding the wound pipe 1. The winding pipe 1 is mounted on a pipe mounting portion 2 in which a light receiving element 4 is arranged. on the other hand,
A light emitting element 5 is attached to the moving mechanism 6, and the seam 1A of the winding pipe 1 is oriented in a direction suitable for welding.
The light emitted from the light emitting element 5 reaches the light receiving element 4 through the inspection hole 1B. Pipe mounting part 2
2A, a light receiving window 2A is installed at a position corresponding to the inspection hole 1B and the light receiving element 4. Here, the infrared photodiode 4 is used as the light receiving element, and the light receiving window 2A is an optical filter that transmits only the wavelength near the light receiving element 4.

FIG. 6 shows the suspension arm 12 and the boss 1.
It is a block diagram which shows the structure of the control means 8 of the manufacturing apparatus which welds and. The control means 8 is composed of a sequencer, each member is connected to the input / output unit 82, and is controlled by the CPU unit 81. The control means 8 includes the light receiving element 4
The abnormality of the position of the seam 1A of the winding pipe 1 is detected based on the output from. In the example shown in FIG. 5, when the light is received, it is determined that the seam 1A of the winding pipe 1 is installed in the normal direction. On the other hand, when the light is not received, the installation position of the seam 1A of the winding pipe 1 is abnormal. To determine.

FIG. 7 is a perspective view showing the structure of the manufacturing apparatus. Here, the worker mounts the winding pipe 1 on the pipe mounting portion 2
The present invention is used without limitation in any automated manufacturing apparatus.

On the front surface of the manufacturing apparatus 11, a cylindrical pipe mounting portion 2 for setting the winding pipe 1 with an inspection hole.
There is a seam position mark 3 indicating the seam position when the pipe is set. A light receiving element 4 such as an infrared photodiode is installed inside the pipe mounting portion 2. Reference numeral 5 is a light emitting element such as an infrared light emitting diode, and reference numeral 6
Is a moving mechanism for moving the light emitting element 5 to the height (inspection position) of the pipe mounting portion 2, and reference numeral 7 is a clamp for fixing the set pipe.

Reference numeral 9 is a set button for notifying the control means that the worker has set the pipe. Sign 1
0 is a set button to inform the operator that the pipe joint position is defective. Reference numeral 10 is an alarm device including a buzzer, a lamp, etc. for notifying the operator that the pipe joint position is defective, reference numeral 12 is a suspension arm, and reference numeral 13 is an arm moving mechanism.

As described above, when the wound pipe 1 is properly set, the pipe mounting portion 2 is located at a position overlapping the inspection hole.
Is provided with a light receiving window 2A. The light receiving window 2A is an optical filter that transmits only the light receiving and emitting wavelengths of the light receiving element 4 and the light emitting element 5. The light receiving element 4 is mounted inside the pipe mounting portion 2, and the light receiving surface is directed to the light receiving window 2A. Therefore, when the pipe 1 is correctly set on the pipe mounting portion 2, the light emitted by the light emitting element 5 moved to the inspection position by the moving mechanism 6 is received by the light receiving element through the inspection hole 1B and the light receiving window 2A. .

Next, the processing steps of the inspection device for welding the wound pipe 1 will be described as the operation of the manufacturing device. FIG. 8 is a flowchart of the process, and the processing is performed from (S1) to (S8).
I will explain separately. Here, the description (→ a) is shown in FIG.
It corresponds to the operation of (a) in the inside.

(S1). The operator attaches the wound pipe 1 to the pipe attachment portion 2 (→ a) so that the joints match the marks 3 and presses the set button 9. The control means 8
When the ON of the set button 9 is detected, the process proceeds to (S2).

(S2). The control means 8 moves the clamp 7 (→ b) to fix the winding pipe 1, moves the light emitting element 5 to the inspection position by the moving mechanism 6 (→ c), and turns on the light emitting element 5.

(S3). The control means 8 checks whether the light receiving element 4 has received light (ON), and if it is ON, determines that the seam position is normal (S4) and (S5) and proceeds to O.
If it is not N, it is judged that the seam position is defective (S6),
The process proceeds to (S7) and (S8).

(S4). The control means 8 turns off the light emitting element 5 and causes the moving mechanism 6 to retract it to the original position (→ d).

(S5). The control means 8 brings the suspension arm 12 into close contact with the winding pipe 1 by the moving mechanism 13 (→ e), welds the arm 12 and the winding pipe 1 by the welding device 14, and after releasing the pipe clamp (→ f),
The pipe welded arm (reference numeral 1 + reference numeral 12) is moved to the next step (→ g).

(S6). After releasing the pipe clamp 7 (→ f), the control means 8 informs the operator of the defective pipe setting by the alarm device 10.

(S7). The operator corrects the seam position and presses the set button 9 again. The control means 8 detects that the set button 9 is ON and proceeds to the processing of (S8).

(S8). The control means 8 clamps the wound pipe (→ b) to release the pipe set failure alarm, and (S
Return to the process of 3).

Since the inspection hole 1B of the pipe is located at the center of the joint, there is no positional deviation between the inspection hole 1B and the light receiving window 2A no matter which one is inserted, the operator does not need to consider the inserting direction.

As described above, according to this embodiment, since the seam position of the winding pipe can be easily and automatically inspected, no defective product is generated. In addition, an inspector at the seam position is unnecessary. Moreover, since the inspection is performed before welding, even if it is determined to be defective in the inspection, it can be easily corrected. Further, by providing the inspection hole at the center of the seam, it is not necessary for the operator to consider the direction in which the winding pipe is set.

[0034]

Since the present invention is constructed and functions as described above, according to this, when the light emitting element irradiates the light receiving element through the inspection hole, the seam of the pipe of the winding pipe is normally installed. In this case, the light from the light emitting element reaches the light receiving element through the inspection hole, and the light receiving element outputs a signal to the control means in response to the irradiation from the inspection hole,
By setting the welding position of the winding pipe when welding the winding pipe with the light emitting element and the light receiving element, in particular, by setting the position of the seam of the winding pipe,
The control means can easily and reliably detect an abnormality in the installation position of the winding pipe based on whether or not the light receiving element receives light. As described above, it is possible to provide a winding pipe which is easily inspected for the direction of a seam to be welded and an excellent inspection device which can surely inspect the position where the welded pipe is welded, which has not been available.

[Brief description of drawings]

FIG. 1 is a diagram showing a structure of a wound pipe according to an embodiment of the present invention, and FIG. 1 (a) is a perspective view showing a structure of a flat plate;
FIG. 1B is a perspective view showing a state in which the flat plate shown in FIG.

2A and 2B are diagrams showing a configuration of a suspension in which the wound pipe shown in FIG. 1 is adopted as a boss, FIG. 2A is a rear view, and FIG. 2B is a top view.

3A and 3B are views showing a joining relationship between the suspension arm of the suspension shown in FIG. 2 and the winding pipe shown in FIG. 1, FIG. 3A being a front view thereof, and FIG. 3B being a side view thereof. .

4 is a sectional view of the suspension arm shown in FIG. 3, and FIG. 4 (a) is a sectional view taken along the line AA.
(B) is sectional drawing in the BB line.

5 is an explanatory view showing the operating principle of the inspection device for welding the wound pipe shown in FIG. 1 according to the present invention.

6 is a block diagram showing a configuration of control means for controlling the inspection device shown in FIG.

7 is a schematic perspective view showing the configuration of a manufacturing apparatus for welding a wound pipe and a suspension arm, which is controlled by the control means shown in FIG.

8 is a flowchart showing an operation of the manufacturing apparatus shown in FIG.

9 is a diagram showing the configuration of a conventional wound pipe, and FIG.
9A is a perspective view showing a configuration of a flat plate, and FIG. 9B is a perspective view showing a state in which the flat plate shown in FIG. 9A is rolled.

10 is a schematic perspective view showing the configuration of a conventional welding device for welding the wound pipe and the suspension arm shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Winding pipe (boss) 1a Flat plate 1b Cutout part 1A Seam (joint) of winding pipe 1B Inspection hole 2 Pipe mounting part 4 Light receiving element 5 Light emitting element 8 Control means

Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location G01B 11/30 Z

Claims (2)

[Claims] 1. A wound pipe manufactured by winding a flat plate, wherein a cutout portion is provided at each center position of one side of the flat plate and the other side facing this side, and the cutout portion is fitted to the inspection hole. A wound pipe, which has been wound so as to produce. 2. The winding pipe according to claim 1, a light receiving element which is installed in the winding pipe and which reacts to irradiation from the inspection hole, a light emitting element which irradiates the light receiving element through the inspection hole, And a control means for detecting an abnormality in the position of the seam of the wound pipe based on the output from the light receiving element.