JP2015226966A - Manufacturing method for welding component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method for a welding component which suppresses a deviation of a first workpiece from a second workpiece without using a fixture during welding in a welding component formed by welding the first workpiece to the second workpiece.SOLUTION: In a welding component related to this invention and a manufacturing method for the same, a manufacturing method for a steering member 100 (welding component) formed by welding a first workpiece such as an audio bracket 10b to a steering member body 20 (second workpiece) with a robot 210 actuated on the basis of previously taught data enables a hand robot to bring an extension part 12, provided in the first workpiece to extend the second workpiece, in the outer surface of the second workpiece while making the gripped first workpiece approach a position of welding to the second workpiece. When the extension part is brought in contact with the outer surface of the second workpiece, the extension part welds the first workpiece to the second workpiece while suppressing a positional deviation of the first workpiece from the second workpiece by clamping the steering member body.

Description

  The present invention relates to a method for manufacturing a welded part.

  As a welded part formed by welding the first work to the second work, for example, a welded part used in an automobile or the like can be exemplified. Automobiles are manufactured by joining and assembling tens of thousands of parts by bolting, bonding, or welding. For example, as described in Patent Document 1, several types of components such as a steering column and a side bracket are joined to the steering member disposed in the front part of the passenger compartment. In addition, the parts to be welded may be gripped by a robot hand as in Patent Document 2.

JP 2000-218171 A JP 2007-069333 A

  Steering members (welded parts) are attached to left and right ends in the longitudinal direction of the pipe-shaped steering member body (second workpiece), and then left and right audio brackets near the center of the steering member body in the longitudinal direction. In addition, a large number of parts (first workpiece) such as a steering column and an instrument stay are attached.

  When welding a part to a steering member body, a fixing jig is generally used to maintain the welding position of the part. However, the shape and structure of the fixing jig varies depending on the shape of the part to be welded and the mounting position. For this reason, it is necessary to provide a dedicated jig for each component, which increases the cost. In addition, there is a problem that a large facility is required for the fixture. Therefore, there is a technique in which the robot hand is moved and the fixing jig is abolished as in Patent Document 2, but high accuracy is required for the moving position of the robot hand, so that variation management is difficult.

  Accordingly, the present invention has been made to solve the above-described problems, and in a welded part formed by welding a first workpiece to a second workpiece, a fixing jig is not used during welding. Another object of the present invention is to provide a method for manufacturing a welded part that suppresses the displacement of the first workpiece relative to the second workpiece.

  The present invention that achieves the above object is a method for manufacturing a welded part formed by operating a robot based on previously taught data and welding a first workpiece to a second workpiece. The extending portion provided on the first workpiece and extending toward the second workpiece is brought into contact with the outer surface of the second workpiece while bringing the gripped first workpiece closer to the welding position of the second workpiece. When the extension portion is brought into contact with the outer surface of the second workpiece, the extension portion holds the second workpiece and suppresses the displacement of the first workpiece with respect to the second workpiece. The first workpiece is welded to the second workpiece.

  According to the method for manufacturing a welded part according to the present invention, the robot is operated based on previously taught data so that the extended portion provided on the first workpiece is brought into contact with the outer surface of the second workpiece. Welding is performed while suppressing the positional deviation of the first workpiece with respect to the second workpiece by the extension portion pinching the second workpiece. Therefore, it is possible to manufacture a welded part in which the displacement of the relative position of the first workpiece with respect to the second workpiece is suppressed without a fixing jig.

It is a perspective view which shows the welding component which concerns on one Embodiment of this invention. FIG. 2A is an enlarged view showing the vicinity of a part to be welded, FIG. 2A is a perspective view, and FIG. 2B is a plan view. It is sectional drawing in the position of the 3-3 line of FIG. 2 (B). It is a perspective view which shows the manufacturing apparatus of the welding components which concern on the embodiment. 5A and 5B are a perspective view and a front view showing a fixed positioner (supporting tool) constituting the manufacturing apparatus. 6A and 6B are a perspective view and a front view showing a movable positioner (supporting tool) constituting the manufacturing apparatus. FIG. 7A to FIG. 7D are a perspective view, a front view, a plan view, and an enlarged view showing a hand at the tip of the hand robot constituting the manufacturing apparatus. FIG. 8A to FIG. 8C are a perspective view, a front view, and a plan view showing a welding robot constituting the manufacturing apparatus. It is a flowchart which shows the manufacturing method of the welding components which concern on the embodiment. FIG. 10A and FIG. 10B are a perspective view and a plan view showing how the side brackets are arranged in the manufacturing method. FIGS. 11A and 11B are a perspective view and a plan view showing a state in which the steering member main body is welded to the side bracket. FIGS. 12A and 12B are a perspective view and a plan view showing a state where the side bracket is welded to the steering member main body. FIGS. 13A and 13B are a perspective view and a plan view showing a state in which a bracket airbag is welded to the steering member main body. FIGS. 14A and 14B are a perspective view and a plan view showing a state where the audio bracket is welded to the steering member main body. FIGS. 15A and 15B are a perspective view and a plan view showing a state in which the audio bracket is welded to the steering member main body. FIGS. 16A and 16B are a perspective view and a plan view showing a state where the bracket impact is welded to the steering member main body. FIGS. 17A and 17B are a perspective view and a plan view showing a state in which the instrument stay is welded to the steering member main body.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the following description does not limit the technical scope and terms used in the claims. In addition, the dimensional ratios in the drawings are exaggerated for convenience of explanation, and may differ from actual ratios.

  FIG. 1 is a perspective view showing a welded part according to an embodiment of the present invention. 2A is an enlarged perspective view showing the vicinity of a part to be welded, FIG. 2B is a plan view, and FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. 2B. 4 (A) and 4 (B) are a perspective view and a front view showing the welding component manufacturing apparatus according to the embodiment. 5 (A) and 5 (B) are a perspective view and a front view showing a fixed positioner constituting the manufacturing apparatus, and FIGS. 6 (A) and 6 (B) show a movable positioner constituting the manufacturing apparatus. It is a perspective view and a front view. 7 (A) to 7 (D) are a perspective view, a front view, a plan view, and an enlarged view showing a hand at the tip, and FIGS. 8 (A) to 8 (C), showing the hand robot constituting the manufacturing apparatus. ) Are a perspective view, a front view, and a plan view showing a welding robot constituting the manufacturing apparatus.

  FIG. 9 is a flowchart showing a method for manufacturing a welded part according to the embodiment. FIGS. 10 (A), 10 (B) to 17 (A), 17 (B) are perspective views and plan views showing a process for manufacturing the welded part. FIG.

(Steering member)
In this embodiment, the case where the welding component 100 is a steering member 100 for a vehicle such as an automobile will be described as an example. The steering member 100 (corresponding to a welded part) has a part 10 (corresponding to a first workpiece), side brackets 10f and 10g, and a steering member main body 20 (corresponding to a second workpiece). The component 10 and the side brackets 10f and 10g (see FIG. 1) are joined to the steering member main body 20. The component 10 is a component that is joined to the steering member main body 20 other than the side brackets 10f and 10g. In this embodiment, the bracket airbag 10a, the pair of audio brackets 10b and 10c, the instrument stay 10d, and the bracket impact 10e. As shown in FIG. 3, the audio bracket 10 b among the components 10 has an extending portion 12 that extends toward the steering member main body 20 when being positioned and welded to the steering member main body 20. The extending portion 12 suppresses a relative positional shift of the component 10 with respect to the steering member main body 20 when the component 10 is welded to the steering member main body 20.

  The steering member main body 20 has a long pipe shape and is attached to the front of the vehicle body so as to extend in the vehicle width direction. As shown in FIG. 1, a bracket airbag 10a, a pair of audio brackets 10b and 10c, an instrument stay 10d, and a bracket impact 10e are fixed to the intermediate portion of the steering member main body 20 by welding. These parts 10 a to 10 e are fixed to the vehicle body directly or via parts different from the steering member main body 20. Side brackets 10 f and 10 g for attaching to side panels (not shown) on the side of the vehicle body are joined to both ends of the steering member main body 20.

  Here, an audio bracket 10b will be described as an example of the component 10 welded to the steering member main body 20. The audio bracket 10 b has a main body portion 11 and an extending portion 12. The main body 11 occupies most of the volume in the audio bracket 10b, and in the present embodiment, the end is bent, but of course, it may not be bent.

  As shown in FIG. 3, the extending portion 12 extends toward the steering member main body 20 when the audio bracket 10 b is positioned on the steering member main body 20. The extending portion 12 is in point contact or surface contact with the steering member main body 20, and intersecting directions D 3 and D 4 intersecting the installation direction D 1 for installing the component 10 toward the steering member main body 20 and the longitudinal direction D 2 of the steering member main body 20. To a steering member main body 20. As shown in FIG. 3, the contact portion 13 further includes a sandwiching portion 14 including a sandwiching portion 14 a and a sandwiching portion 14 b that are formed in a pair so that the contact portion 13 sandwiches the steering member main body 20. In the present embodiment, the installation direction D <b> 1 is a direction in which the component 10 is installed on the steering member main body 20, and is directed radially from the outside toward the center of the steering member main body 20. The intersecting directions D3 and D4 are directions in which the steering member main body 20 is pressed by the contact portion 13. The intersecting direction D3 and the intersecting direction D4 are configured to face each other with the steering member main body 20 interposed therebetween, and thus the sandwiching portion 14a and the sandwiching portion 14b sandwich the steering member main body 20. The clamping portion 14 serves as a fixing jig that fixes the position when the component 10 is welded to the steering member main body 20 by clamping the steering member main body 20 from the directions D3 and D4. In the present embodiment, the intersecting directions D3 and D4 face each other in a substantially horizontal direction. However, as will be described later, even if an external force is applied to the audio bracket 10b, a force capable of suppressing a positional shift with respect to the external force is generated. However, the present invention is not limited to this.

  The abutting portion 13 includes a temporary welded portion 31 (corresponding to a temporary fixing weld location) and a main weld portion 32 (corresponding to a main weld location). In this embodiment, the steering member manufacturing method includes a temporary welding process and a main welding process as will be described later. The temporary welding part 31 is formed during the temporary welding process, and the main welding part 32 is a main welding process. Formed during the process.

  The temporary welding portion 31 is formed to temporarily attach the component 10 to the steering member main body 20 and maintain the position with respect to the steering member main body 20 prior to the main welding. In this embodiment, although the welding location is formed intermittently, it is not limited to this and may be formed continuously. In addition, the welding locations are formed, for example, at two locations and three locations so that the component 10 is fixed to the steering member main body 20, but is not limited thereto.

  The main welding part 32 is formed in the contact part 13 other than the temporary welding part 31. In the present embodiment, the main welding portion 32 continuously forms the welded portion, but is not limited thereto, and may be formed intermittently. In addition to the audio bracket 10b, the audio bracket 10c and the instrument stay 10d have an extending part 12, an abutting part 13, a clamping part 14, a temporary welding part 31, and a main welding part 32, like the audio bracket 10b.

(Steering member manufacturing equipment)
Next, the bonded component manufacturing apparatus according to the present embodiment will be described. As shown in FIGS. 4A and 4B, the joined part manufacturing apparatus 200 includes a hand robot 210 (corresponding to a robot), a welding robot 220, a locator 230, positioners 240a and 240b, and a control. Unit 260, camera 265, and component collection unit 270.

  The hand robot 210 includes a body portion 211, arms 212, 213, and 214, and a hand 215. The body part 211 is a place to be placed on the ground of the apparatus, and has a rotating part 211a. The body portion 211 is configured to be rotatable about the vertical direction with respect to the ground by the rotating portion 211a. The arm 212 has a rotating part 212a and is rotatably attached to the body part 211 by the rotating part 212a. The arm 213 has a rotating part 213a and is rotatably attached to the arm 212 by the rotating part 213a. The arm 214 has a rotating part 214a and is rotatably attached to the arm 213 by the rotating part 214a.

  The hand 215 includes a fixed portion 215a, a movable portion 215b, a rail 215c, a rotating portion 215d, and a camera 216. The fixing portion 215a is attached in a state of being fixed to the rail 215c. The movable portion 215b is attached to the rail 215c so as to be movable in the direction in which the rail 215c extends (lateral direction in FIG. 7D). The rotating portion 215d is rotatable with the fixed portion 215a, the movable portion 215b, and the rail 215c as the rotation axis in the extending direction of the fixed portion 215a and the movable portion 215b. As described above, the hand robot 210 is an articulated robot provided with a large number of rotation axes. By configuring as described above, the hand robot 210 can be joined from various trajectories, such as gripping a workpiece part in various states. Can be approached to other parts.

  The camera 216 is built in the rail 215c, and is used to grasp the orientation and size of the gripped component by photographing the component when the hand 215 grips the component.

  Unlike the camera 216, the camera 265 is installed so that the working range of the manufacturing apparatus can be photographed at a wide angle. Whether the camera 265 confirms the orientation of the part gripped by the hand 215, is positioned by the hand robot 215, and images the joined parts and is positioned at a predetermined position. It is used for confirming etc. Therefore, the camera 265 can also capture a wide range of images including the hand robot 210, the welding robot 220, and the positioners 240a and 240b.

  The hand robot 210 takes out the part from the part collecting unit 270 and then operates to hold the part toward the camera 265. As a result, the camera 265 captures the part gripped by the hand 215, and confirms in what direction and position the part is gripped by the hand 215 by means of image processing by means other than the camera 216. In addition, the hand robot 210 can correct the orientation of the gripped component from the information obtained by the camera 216 and the camera 265. Note that the operation for correcting the orientation of the gripped component is the same as the operation of a general hand robot, and a description thereof will be omitted.

  The welding robot 220 includes a body portion 221, arms 222, 223, 224, a welding torch 225, a camera 226, a wire 227, and a wire feeding unit 228. The body part 221 is a place to be placed on the ground of the apparatus, and has a rotating part 221a. The body portion 221a is configured to be rotatable about the vertical direction with respect to the ground by the rotating portion 221a. The arm 222 has a rotating part 222a, and is rotatably attached to the body part 221 by the rotating part 222a. The arm 223 has a rotating part 223a and is rotatably attached to the arm 222 by the rotating part 223a. The arm 224 has a rotating part 224a and is rotatably attached to the arm 223 by the rotating part 224a.

  The welding torch 225 is attached to the tip of the arm 224. The tip of the welding torch 225 is positioned at a position where the part can be welded with reference to the position of the part positioned on the steering member body 20. Therefore, the position of the tip of the welding torch 225 is taught on the basis of the part position taught to the hand robot 210. When the component position by the hand robot 210 is corrected, the position of the tip of the welding torch 225 is also corrected accordingly.

  The welding torch 225 has a rotating part 225a. The rotating unit 225a is configured to be able to rotate with the extending direction of the arm 224 as a rotation axis. As described above, the welding robot 220 is also configured to be articulated similarly to the hand robot 210, and the welding torch 225 can be approached to the steering member 100 from various directions and directions to perform welding. The wire 227 extends from the wire feeding unit 228 to the inside of the welding torch 225. The wire feeding unit 228 supplies the wire 227 toward the welding torch 225.

  In addition, a camera 226 is built in the rotating unit 225a. The camera 226 photographs a part that is positioned and held by the hand 215. Then, the position (and / or inclination) of the part is measured from the captured image. Therefore, the camera 226 has a function of measuring the size of an object and a distance between objects in a captured image (referred to as an image distance measurement function). As an image distance measurement function, for example, an object (reference scale) used as a reference for determining a distance in an image is photographed in advance, and the correspondence between the actual size of the reference scale and the size in the image is obtained. Keep it. Then, the correspondence between the real object and the image on the stored reference scale is used to obtain the size of the object photographed for measurement, the distance between the objects, and the inclination. Such an intra-image distance measuring function may be a well-known one and is not particularly limited.

  Further, the camera 226 may have a distance measuring function for measuring the distance from the current position of the camera 226 to the photographed object. As the distance measurement function, a passive distance measurement used for focusing of the camera 226, an active distance measurement function using laser light or ultrasonic waves, or the like can be used. The distance measuring function may be a well-known one and is not particularly limited. By using such a distance measuring function and an in-image distance measuring function, the part position measured by the camera 226 can be calculated as a position in the operation coordinate system of the welding robot 220.

  Note that the above-described intra-image distance measurement function and distance measurement function may also have the camera 265. In addition, the image processing in the image distance measurement, the distance measurement performed as necessary, and the calculation processing thereof are performed by the control unit 260.

  The locator 230 includes a locator 231 and a locator 232, but the number is not limited to this. The locator 231 holds the steering member body 20 or releases the grip. The locator 232 holds the steering member main body 20 at a different position in the longitudinal direction of the steering member main body 20 in the same manner as the locator 231 or releases the grip.

  Therefore, holding of the steering member main body 20 by the locator 230 includes holding by the locators 231 and 232 or holding by the locators 231 and 232. When the locators 231 and 232 do not grip the steering member main body 20, the upper part of the locator 232 is separated from the slide base 243 in the direction intersecting the longitudinal direction (the depth direction in FIG. 4B). Thus, the welding robot 220 and the hand robot 210 are prevented from entering the area when operating. The locators 231 and 232 have the same configuration as a slide portion 242 of positioners 240a and 240b described later. Accordingly, the slide base 243 can be moved closer to and away from the longitudinal direction.

  The positioners 240a and 240b grip and hold both ends of the steering member main body 20. As shown in FIGS. 5 and 6, the positioners 240 a and 240 b include a support base 241 that serves as a support column for the positioners 240 a and 240 b and a grip portion 244 that grips the steering member main body 20. The gripping portion 244 includes clampers 245 and 246, a power portion 247 having a power mechanism for operating the clampers 245 and 246, and positioning pins 248 and 249 for positioning members attached to both ends of the steering member main body 20. Have. As shown in FIG. 6A, the positioner 240b also has a slide portion 242 that allows the positioner 240a to be slidable in the longitudinal direction of the steering member main body 20 in addition to the above configuration. The slide part 242 is linked to the slide base 243.

  The support base 241 is a support that supports the steering member main body 20, and is connected to the grip portion 244 on the side surface that grips the steering member main body 20. In the positioner 240a, the lower part of the support base 241 is fixed to the apparatus 200, and the lower part of the support base 241 in the positioner 240b is connected to the slide portion 242. In this embodiment, the support base 241 is composed of a single member and has a predetermined height. However, the support base 241 may be composed of, for example, two or more members and provided with a height adjusting mechanism. Good. Further, as shown in FIG. 5A, the support base 241 is connected to the grip 244 via a rotation shaft 253, and the support base 241 includes a rotation mechanism having a motor, a gear pair, and the like. By providing the rotation mechanism on the support base 241, the grip portion 244 can rotate around the rotation shaft 253 while gripping the steering member main body 20.

  The slide part 242 cooperates with the slide base 243 to enable the positioner 240b to move in the longitudinal direction of the steering member main body 20. Although the slide part 242 and the slide base 243 are configured to be movable by providing a gear pair, the present invention is not limited to this.

  The clampers 245 and 246 are configured to hold the steering member main body 20 at both ends. In the present embodiment, rotating shafts 251 and 252 are provided in a part of the power unit 247, and the clampers 245 are mounted on the rotating shafts 251 and 252. 246 is rotatably mounted.

  The power unit 247 includes a motor for operating the clampers 245 and 246 and a rotation mechanism for the clampers 245 and 246 such as gear pairs. By grasping the steering member 100 and releasing the gripping, the clampers 245 and 246 are rotated around the rotation shafts 251 and 252 and the opening angle formed by the clampers 245 and 246 is adjusted.

  The positioning pins 248 and 249 are provided on the outer surface of the power unit 247. As described above, the positioning holes for inserting the positioning pins 248 and 249 are provided in the side brackets 10f and 10g disposed at both ends in the longitudinal direction of the steering member 100. By inserting the positioning holes of the side brackets 10f and 10g into the positioning pins 248 and 249, the side brackets 10f and 10g are attached to the positioners 240a and 240b and positioned. After the side brackets 10f and 10g are joined to the steering member main body 20 in a state of being inserted into the positioning pins 248 and 249 of the positioners 240a and 240b, the side brackets 10f and 10g are gripped by the clampers 245 and 246, thereby the steering member main body. 20 is also supported with the side brackets 10f and 10g.

  The control unit 260 includes a CPU, RAM, ROM, LAN, and the like, and controls operations of components such as the hand robot 210, the welding robot 220, the locator 230, and the positioners 240a and 240b. The control unit 260 includes a gripping direction and a gripping position when the hand robot 210 grips the component 10, the side brackets 10f and 10g, and the steering member main body 20, and the component 10 with respect to the steering member main body 20 when transported and positioned. Teaching data such as position and orientation is stored in advance.

  The parts collection unit 270 is a space for collecting the steering member main body 20 and the brackets 10a to 10g so that the hand robot 210 can easily carry the bracket before the brackets 10a to 10g are joined to the steering member main body 20. The component collection unit 270 is configured by the two plates 271 and 272, but is merely an example, and may be configured by a shelf having a plurality of stages.

(Manufacturing method of steering member)
Next, a method for manufacturing the steering member 100 according to the present embodiment will be described. As shown in FIG. 9, the manufacturing method of the steering member 100 according to the present embodiment can be summarized as follows: setting of the side brackets 10f and 10g and the steering member main body 20, welding (step ST1), and gripping of the component 10 (step ST2). ), Positioning (steps ST4a, S4b), provisional welding (step ST5), main welding (step ST6), and conveyance to the next process (step ST8). In this embodiment, welding is performed in the order of the bracket airbag 10a, audio brackets 10c and 10b, bracket impact 10e, and instrument stay 10d from the state in which the side brackets 10f and 10g are joined to the steering member body 20. It is an illustration and it is not limited to this.

  First, as shown in FIG. 10, the hand robot 210 grips the side bracket 10f, conveys it toward the positioner 240a, and sets it. Then, as shown in FIG. 11, the steering member main body 20 is set so as to be positioned on the side bracket 10 f and welded by the welding robot 220 in that state. Next, as shown in FIG. 12, the side bracket 10g is gripped, conveyed and set to the positioner 240b, and welded to the steering member main body 20 by the welding robot 220 (step ST1).

  Next, the hand robot 210 is operated based on previously taught data, and the bracket airbag 10a is gripped from the component collecting unit 270 (step ST2) and positioned. The bracket airbag 10a does not have an extending portion in this embodiment (step ST3: NO). Therefore, the hand robot 210 is positioned at the taught position and held until welding (step ST4b).

  Next, welding robot 220 approaches the taught welding location, performs temporary welding (step ST5), and performs main welding (step ST6). Since there are parts that are not yet welded in the steering member body 20 (step ST7: NO), the hand robot 210 acquires another part from the parts collection unit 270 (step ST2).

  In the present embodiment, the audio brackets 10b and 10c and the instrument stay 10d, which are the remaining parts, have the extending portion 12, and the bracket impact 10e does not have the extending portion 12. When the extended portion 12 is not provided (step ST3: NO), similarly to the bracket airbag 10a, after positioning at a previously taught position (step ST4b), temporary welding (step ST5) and main welding (step ST6) is performed.

  In contrast, when the part to be welded to the steering member main body 20 has the extended portion 12 (step ST3: YES), as shown in FIG. 3, the extension is performed based on the data taught in advance. The portion 12 is positioned and held so as to contact the steering member main body 20 (step ST4a). Then, temporary welding (step ST5) is performed while suppressing the positional deviation with respect to the steering member main body 20 by the extending part 12, and main welding (step ST6) is performed. In this way, the audio brackets 10c and 10b, the bracket impact 10e, and the instrument stay 10d are welded to the steering member main body 20 as shown in FIGS.

  When the welding of the instrument stay 10d is finished, in this embodiment, all the parts are welded to the steering member main body 20 (step ST7: YES). Then, the hand robot 210 grips the steering member 100 and transports it to the next process (step ST8).

  Next, the effect by the manufacturing method of the steering member 100 of this embodiment is demonstrated. When manufacturing a welded part such as a steering member, a jig may be used to fix the part. However, the jig has a different shape and structure depending on the shape of the component to be attached. Therefore, in order to weld a plurality of parts to the steering member main body like the steering member, it is necessary to prepare jigs corresponding to the individual parts, leading to a problem that costs increase.

  On the other hand, in the steering member 100 and the manufacturing method thereof according to the present embodiment, the component 10 such as the audio bracket 10b constituting the steering member 100 has an extending portion 12 that extends toward the steering member main body 20. When welding the component 10 to the steering member body 20, the hand robot 210 is operated based on previously taught data to grip the component 10. Then, the extending part 12 is brought into contact with the outer surface of the steering member main body 20 while bringing the gripped component 10 close to a position where the gripped component 10 is welded to the steering member main body 20, and the steering member main body 20 is sandwiched by the extending part 12 Welding is performed while suppressing positional deviation of the component 10 with respect to the steering member main body 20.

  Therefore, the steering member 100 in which the displacement of the relative position of the component 10 with respect to the steering member main body 20 is suppressed can be manufactured even if there is no fixing jig by bringing the extending portion 12 into contact with the steering member main body 20. . In addition, since a fixing jig for fixing the component 10 is not required, the cost for the fixing jig can be eliminated, and the cost can be reduced. Furthermore, since a fixing jig can be dispensed with, the manufacturing apparatus can be downsized and the production line can be saved, and the fixing jig can be attached and released without any work, so that the production tact can be shortened. Further, even when an external force is applied to the component 10 by hitting the welding wire 27 of the welding robot 100 or the like when the steering member 100 is manufactured, the extended portion 12 is in contact with the steering member main body 20. The position shift can be prevented or suppressed against the external force.

  Further, in the extending portion 12, the component 10 is welded to the steering member main body 20 at a contact portion 13 between the component 10 and the steering member main body 20. Therefore, by welding the contact portion 13, it is possible to further prevent positional deviation that may occur during welding.

  Further, in the contact portion 13, the component 10 is temporarily welded to the steering member main body 20 and is formed by temporary welding, and main welding is performed in the contact portion 13 other than the temporary weld portion 31. And a portion 32. Since the temporary welded portion 31 can serve as a fixing jig after the temporary welding, it is possible to prevent the position shift even if the component 10 is not gripped by the hand robot 210. Therefore, it is possible to cause the hand robot 210 to perform another work, and to quickly perform the work of manufacturing the steering member 100.

  The workpiece of the welded part according to the present embodiment can be specifically configured by a pipe-like steering member main body 20 and brackets 10a to 10e joined to the steering member main body 20.

  In addition, the present invention can be variously modified based on the configurations described in the claims, and these are also within the scope of the present invention. In the above description, when the component 10 is welded to the steering member main body 20, provisional welding is performed in addition to the main welding. However, provisional welding may not be performed. Moreover, although the contact part 13 described having the temporary welding part 31 and the main welding part 32, it is not limited to this. The abutting portion 13 may have a configuration having only one of the temporary welded portion 31 and the main welded portion 32. In other words, the part 10 is welded in a state where it is not in contact with the steering member main body 20 in the component 10. There may be. Furthermore, the cross-sectional shape of the steering member main body 20 is not limited to a circle but may be a polygon.

  In the above description, the audio brackets 10b and 10c and the instrument stay 10d are provided with extending portions, and the bracket impact 10e and the bracket airbag 10a are not provided with extending portions. However, the present invention is not limited thereto. The bracket impact 10e and the bracket airbag 10a may also be configured to provide an extended portion.

  In addition, although the embodiment in which a plurality of components 10 such as an audio bracket and an instrument stay are welded to the steering member main body 20 has been described, the embodiments are exemplarily listed and are not limited thereto. Even when one member is welded to a member to be welded such as the steering member main body 20 to form a welded part, the welded part 100 and the welding method according to the present invention can be applied.

  Moreover, in this embodiment, although the steering member 100 was illustrated as a welding component, it is not restricted to this, For example, another vehicle component may be sufficient and it may not be a vehicle component. In the above-described embodiment, the second workpiece that hits the steering member main body 20 may not be long.

10 parts (first workpiece),
10a parts (bracket airbag),
10b, 10c parts (a pair of audio brackets),
10d parts (instrument),
10e Parts (bracket impact),
10f, 10g side bracket,
11 Main body,
12 Extension part,
13 Contact part (contact part),
14, 14a, 14b Nipping part 20 Steering member main body (second workpiece),
31 Temporary welds,
32 welds,
100 Steering member (welded part),
200 welding equipment,
210 hand robot,
220 welding robot,
230 Locator,
240a, 240b positioner,
260 control unit,
270 Parts collection unit.

Claims (4)

A method of manufacturing a welded part formed by operating a robot based on previously taught data and welding a first workpiece to a second workpiece,
The robot has an extending portion provided on the first workpiece and extending toward the second workpiece while bringing the gripped first workpiece closer to a position where the second workpiece is welded. Abut against the outer surface of the workpiece,
When the extension portion is brought into contact with the outer surface of the second workpiece, the extension portion sandwiches the second workpiece so that the first workpiece is displaced relative to the second workpiece. A method for manufacturing a welded part, wherein the first workpiece is welded to the second workpiece while suppressing the above-described problem.   2. The method for manufacturing a welded part according to claim 1, wherein when the first workpiece is welded to the second workpiece, the contact portion where the extension portion is in contact with the second workpiece is welded. .   When welding the contact location, perform temporary fixing welding to temporarily fix the first workpiece to the second workpiece, perform main welding at a location other than the location where the temporary fixing welding is performed, The method for manufacturing a welded part according to claim 2, wherein the contact part includes at least a welded part of the temporary welding or a welded part of the main welding.   4. The welded part according to claim 1, wherein the second work is a pipe-shaped steering member main body, and the first work is a bracket welded to the steering member main body. 5. Production method.