JP6940054B2 - Welding equipment and welding system - Google Patents

Description

The present invention relates to a welding device for arc welding a welded object and a welding system using this welding device.

For example, in order to firmly connect two welding members (welded objects), arc welding is widely used in which an arc is generated between a welding wire (welding rod) and a welded object (base metal) for welding. .. In recent years, a welding device using a welding robot to automatically perform this arc welding has become widespread (see, for example, Patent Document 1). In this welding device, a welding robot is installed, for example, on the floor surface of a factory (or a support base installed on the floor surface), a welded object is placed, for example, on a welding table, and the welding robot is placed on a welding table. The welded members are welded and fixed by performing the required arc welding on the supported welded material.

Japanese Unexamined Patent Publication No. 2010-172953

However, in such a welding device, a welding robot is installed on the floor surface of a factory, for example, and the welded material is placed on a welding table. For example, in order to join a pair of tubular members (welded objects) by welding, first weld one side (upper side) of the pair of tubular members placed on the welding table, and then these. After turning over the tubular members, the other side (the remaining side) of them is welded. Therefore, there is a problem that it is difficult to efficiently and neatly weld the entire circumference of a pair of tubular members (welded objects).

In particular, when welding the entire circumference of a relatively large welded object, the weight of the welded object becomes heavy and it is not easy to handle, and for example, the work of turning over the welded object becomes very complicated. In addition, since the welding robot is installed on one side of the welded object, the range of movement of the welding head of the welding robot is also limited, and it is difficult to weld the welding portion on the opposite side to the installation side of the welding robot. There is.

An object of the present invention is to provide a welding apparatus capable of efficiently and cleanly welding the entire circumference of a welded object without welding defects.

Another object of the present invention is to provide a welding system capable of efficiently welding a relatively large welded object.

The welding apparatus according to claim 1 of the present invention is attached to a support frame structure for supporting an upper support frame arranged above the welding area of a welding path of a welded object and the upper support frame. It is provided with a welding robot and a pair of welded object supporting means arranged on both sides of the transport path corresponding to the welded area, and each of the paired welded object supporting means is rotatable on a supporting body. A supported spindle and a chuck means that rotates integrally with the spindle are provided, a first support jig is attached to one end side of the weld, and a second support jig is attached to the other end of the weld. A support jig is attached, and a support protrusion of the first support jig is detachably held by the chuck means of one of the pair of weld support means, and the pair of weld support means. The chuck means of the other weld support means of the weld support means is characterized in that the support protrusion of the second support jig is detachably held.

Further, in the welding apparatus according to claim 2 of the present invention, the first support jig is eccentrically attached to the one end side of the welded object, and the second support jig is eccentrically attached to the other end side of the welded object. The welded object is eccentrically attached to, and is characterized in that the welded object is rotated about the support protrusion of the first and second support jigs.

Further, in the welding apparatus according to claim 3 of the present invention, there are a plurality of types of welded objects having different axial lengths, and the length in the rotation axis direction corresponds to the plurality of types of welded objects. A plurality of different types of first and second support jigs are prepared, and the first and second specific support jigs corresponding to the axial length of the specific weld are selected, and one end side of the specific weld is selected. The first specific support jig is attached, and the second specific support jig is attached to the other end side of the specific welded object.

Further, in the welding apparatus according to claim 4 of the present invention, the both-end support frame structure includes a pair of columnar members that support both ends of the upper support frame, and the pair is attached to one of the pair of columnar members. It is characterized in that any one of the welded support means of the above is attached.

Further, in the welding system according to claim 5 of the present invention, the first and second welding regions are arranged along the conveying direction of the conveying path, and the first welding region corresponds to the first welding region or the first welding region. 2 the first welding device is arranged according to, in response to the second weld region is the second welding device is arranged according to claim 1 or 2, wherein the first welding apparatus, said first welded The welded object is welded in the circumferential direction in the region, and the second welding apparatus is characterized in that the welded object is welded in the axial direction in the second welded region.

Further, in the welding system according to claim 6 of the present invention, the transport trolley is moved along the transport path through the first and second welding areas, and the transport trolley is a trolley that moves along the transport path. It is characterized in that the main body and the bogie main body are provided with a mounting table that can move up and down between a transport position and a mounting position raised from the transport position, and the welded object is mounted and supported on the above-mentioned mounting table. And.

According to the welding apparatus according to claim 1 of the present invention, the upper support frame of the support frame structure is arranged above the welding area, the welding robot is attached to the upper support frame, and the welding robot corresponds to the welding area. Since a pair of welded object supporting means are arranged on both sides of the conveyed path, the welded object conveyed through the conveyed path is supported by the pair of welded object supporting means, and the welding robot can perform the welding robot from above the thus supported welded object. Welding has come to be performed, and therefore the welded material can be welded over a wide area.

Further, the pair of welded object supporting means includes a main shaft rotatably supported by the support main body and a chuck means that rotates integrally with the main shaft, and one end side of the welded object (the first attached to the main shaft). The support protrusion of the support jig) is detachably held by the chuck means of one weld support means, and the other end side (support protrusion of the second support jig attached to the support protrusion) supports the other weld. Since it is detachably held by the chuck means of the means, the welded portion of the weld can be positioned on the upper side (that is, the side facing the welding robot) by rotating the main shaft of the weld support means. As a result, welding can be performed over the entire circumference of the welded object without removing it.

Further, according to the welding apparatus according to claim 2 of the present invention, the first support jig is eccentrically attached to one end side of the welded object, and the second support jig is eccentrically attached to the other end side of the welded object. Therefore, even if both ends of the welded object have an eccentric shape, by attaching the first and second support jigs to both ends thereof, it is possible to rotate the welded material around the supporting protrusions.

Further, according to the welding apparatus according to claim 3 of the present invention, there are a plurality of types of welded objects, and a plurality of types of first and second support jigs are prepared correspondingly, and specific welding is performed. Since the first and second specific support jigs corresponding to the axial length of the object are selected and mounted, the axial direction in the state where the first and second specific support jigs are mounted on the specific welded object. The length is constant, which allows a plurality of types of welds having different axial lengths to be welded as required.

Further, in the welding apparatus according to claim 4 of the present invention, the both-end support frame structure includes a pair of columnar members that support both ends of the upper support frame, and a pair of welded objects are supported on one of the pair of columnar members. Since any one of the means is attached, the size of the welding apparatus in the width direction, that is, the distance between the pair of columnar members can be reduced, whereby the entire apparatus can be miniaturized.

Further, according to the welding system according to claim 5 of the present invention, the first and second welding regions are arranged along the conveying direction of the conveying path, and the first welding apparatus corresponds to the first welding region. Since the second welding apparatus is disposed so as to correspond to the second welding region, the desired welding can be performed on the welded object while being transported through the transport path. Further, since the first welding device performs circumferential welding on the welded object in the first welding area and the second welding device performs axial welding on the welded object in the second welding area, the welded object is welded. It is possible to efficiently perform welding in the circumferential direction and welding in the axial direction.

Further, according to the welding system according to claim 6 of the present invention, the transport carriage is moved through the first and second welding areas, and the mounting table of the transport carriage moves up and down between the transport position and the mounting position. Since it is movable, by holding the mounting table at the transporting position when transporting the welded material, the welded material in the state of being mounted on the mounting table can be stably transported, and the first and first By positioning the transport table at the mounting position in the second welding area, the welded object mounted on the mounting table can be easily held between the pair of welded object supporting means.

Front view showing a welded object to be welded. The front view which shows the 1st Embodiment of the welding apparatus which welds the welded object of FIG. 1 simply. The plan view which shows the welding apparatus of FIG. 2 simply. A front view showing a state in which a welded object is held between a pair of welded object supporting means of the welding apparatus of FIG. FIG. 3 is a perspective view showing a welded object supporting means of FIG. FIG. 5 is a side view showing the welded object supporting means of FIG. It is explanatory drawing for demonstrating the support jig used for supporting a welded object, FIG. 7A shows the support jig of 1st Embodiment, and FIG. 7B is 2nd The support jig of the embodiment is shown. The front view which shows the 2nd Embodiment of the welding apparatus according to this invention simply. The plan view which shows one Embodiment of the welding system according to this invention simply.

Hereinafter, embodiments of a welding apparatus and welding system according to the present invention will be described with reference to the accompanying drawings. First, a first embodiment of a welding apparatus according to the present invention will be described with reference to FIGS. 1 to 7.

Before explaining the welding apparatus according to the present invention, an example of the welded object to be welded by this welding apparatus will be described. In FIG. 1, the illustrated weld 2 is a housing main body 4, an inflow side housing 6 provided on one end side (left side in FIG. 1) of the housing main body 4, and the other end side of the housing main body 4 (in FIG. 1). It is provided with an outflow side housing 8 provided on the right side), and the welded finished product (welded welded product 2) is used, for example, as a housing of a part of a urea SCR device for purifying exhaust gas, and its axial direction ( The length (in the left-right direction in FIG. 1) exceeds 250 cm, and some of them weigh close to 1000 kg.

In this embodiment, the inflow side housing 6 is provided with a first inflow portion 10 and a second inflow portion 12, and these first and second inflow portions 10 and 12 are connected to upstream pipes (not shown). First and second inflow side flanges 14 and 16 are provided for this purpose. Further, the outflow side housing 8 is provided with an outflow portion 18, and the outflow portion 18 is provided with an outflow side flange 20 for connecting to a pipe on the downstream side (not shown).

In such a welded product 2, after the housing body 4, the inflow side housing 6 and the outflow side housing 8 are manufactured separately, one end of the housing body 4 and the inflow side housing 6 are temporarily welded and temporarily joined. Further, the other end of the housing body 4 and the outflow side housing 8 are temporarily welded and temporarily joined, and then, using a welding device 10 described later, over the entire circumference of the joint portion between the housing body 4 and the inflow side housing 6. Further, welding is performed over the entire circumference of the joint portion between the housing body 4 and the outflow side housing 8.

Next, a welding device for welding the welded object 2 will be described with reference to FIGS. 2 and 3. The illustrated welding device includes a welding robot 22 that welds the welded object 2, a support frame structure 24 for supporting the welding robot 22, and a pair of welded object supporting means 26, 28 for supporting the welded object 2. And have. A transport path 30 extending in the transport direction for transporting the welded object 2 is provided, and in this embodiment, a mounting area 32 is provided on one end side (left end side in FIG. 3) of the transport path 30, and a welding area is provided in the middle thereof. 34 is provided, and a carry-out area 36 is provided on the other end side (right end side in FIG. 3).

In this embodiment, a pair of guide rails 38, 40 are installed on the floor surface F of the factory, the guide rails 38, 40 are supported by a plurality of rail support members 43, and the pair of guide rails are supported by these rail support members 43. The intervals of 38 and 40 are maintained. The welding device includes a transport carriage 42 that is moved along a pair of guide rails 38, 40 (that is, a transport path 30), and the transport carriage 42 includes a mounting area 32 (this) on which the welded object 2 is placed. When, the weld 2 is carried out from the welded area 34 (positioned at the position indicated by the alternate long and short dash line 42A) through the welding area 34 (at this time, positioned at the position indicated by the alternate long and short dash line 42A) for welding the welded object 2 as required. At this time, it is reciprocated between (positioned at the position indicated by the alternate long and short dash line 42B).

The illustrated transport trolley 42 includes a trolley main body 44 that is moved along a pair of guide rails 38 and 40, and a mounting table 46 is mounted on the trolley main body 44 so as to be able to move up and down. For example, a pneumatic cylinder mechanism or the like moves up and down between the transport position for transporting the weld 2 (the position shown by the solid line in FIG. 2) and the mounting position for mounting the weld 2 (the position shown by the alternate long and short dash line in FIG. 2). Be moved. Further, a pair of front wheels (not shown) are rotatably mounted on the front side of the bogie body 44, and a pair of rear wheels (not shown) are rotatably supported on the rear side, and these front wheels and rear wheels are rotatably supported. It is mounted on a pair of guide rails 38 and 40 and moved along these guide rails 38 and 40.

In this embodiment, a mounting lift (not shown) is arranged corresponding to the mounting area 32, and the welded material 2 to be welded (the inflow side housing 6 and the outflow side housing 8 are temporarily welded to the housing body 4). The welded material) is mounted and supported on the mounting table 46 of the transport carriage 42 located in the mounting area 32 by using a mounting lift.

A pair of welded object supporting means 26, 28 are arranged on both sides of the conveyed path 30 corresponding to the welded area 34, and the welded object 2 conveyed by the transfer carriage 42 is described later in this welded area 34. It is detachably held by a pair of welded object supporting means 26, 28. At this time, as shown in FIG. 2, the mounting table 46 of the transport carriage 42 is raised from the transport position indicated by the solid line to the mounting position indicated by the alternate long and short dash line, and at this mounting position, the pair of welded object supporting means 26, 28. Is held in.

Corresponding to the welded area 34, the support frame structure 24 is further arranged on the outside of the transport path 30, specifically, on the outside of one of the welded object supporting means 26 (see FIG. 2). The support frame structure 24 includes a columnar member 48 extending upward from the lower end portion fixed and installed on the floor surface F of the factory, and an upper support frame 50 extending upward from the upper end portion of the columnar member 48 in the transport path 30. It has a one-end support structure that supports one end of the upper support frame 50. A welding robot 22 is attached to the tip of the upper support frame 50 of the support frame structure 24. The welding robot 22 has a well-known structure itself, and a welding wire 54 (welding rod) is attached to the tip of the welding arm 52, and an arc is formed between the welding wire 54 and the welded portion of the welded object 2. Is generated and arc welding is performed. Welding by the welding robot 22 will be described in detail later.

After welding the welded object 2, the transport carriage 42 is positioned again in the welding area 34, the mounting table 46 is positioned at the mounting position, and the welded object 2 is mounted on the mounting table 46 in this state. After that, the mounting table 46 is lowered to the transport position and moved to the carry-out area 36 in this transport state.

A carry-out lift (not shown) is arranged corresponding to the carry-out area 36, and the welded weld 2 (a weld in which the inflow side housing 6 and the outflow side housing 8 are completely welded to the housing body 4). Is carried out from the mounting table 46 of the transport cart 42 located in the carry-out area 32 by using a carry-out lift, and is carried out of the welding device.

In this embodiment, a mounting area 32 is provided on one end side of the transport path 30, a carry-out area 36 is provided on the other end side, and the transport carriage 42 moves from left to right in FIG. 3 at the welded area 34. Although the welded object 2 is welded, the loading area 32 may function as the unloading area 36, and the mounting lift may function as the unloading lift. In this case, the loading lift (FIG. The welded object 2 is placed on the transport carriage 42 in the loading area 32 using (not shown), the welded object 2 is welded in the welding area 34, and then functions as the loading area 32 (delivery area 36) again. ), And in this loading area 32, it is carried out using a loading lift (which functions as a loading list), and by configuring in this way, the configuration of the welding device can be simplified. At the same time, the size of the entire device can be reduced.

Next, the pair of welded object supporting means 26, 28 for supporting the welded object 2 will be described. The welded article supporting means 26, 28 have substantially the same configuration, and the following one of the welded object supporting means 26, 28 has substantially the same configuration. 26 (the other welded object supporting means 28) will be described. Mainly referring to FIGS. 5 and 6 together with FIG. 2, the illustrated welded support means 26 (28) includes a support main body 62 installed and fixed on a floor surface F or the like of a factory, and is provided on an upper portion of the support main body 62. A spindle (not shown) is rotatably supported, a chuck means 64 is attached to the spindle, and the chuck means 64 rotates integrally with the spindle.

The chuck means 64 has a chuck base member 66 that rotates integrally with a main shaft (not shown), and the chuck base member 66 has three support base portions 68a, 68b, which are spaced apart from each other in the circumferential direction. 68c is provided, and air chuck members 70a, 70b, 70c are attached to these support base portions 68a, 68b, 68c. The air chuck members 70a, 70b, 70c are attached to the chuck bodies 72a, 72b, 72c and the chuck bodies 72a, 72b, 72c so as to be movable in the radial direction. These chuck claws 74a, 74b, 74c have 74c and move inward in the radial direction by the pressure air to hold the end side of the weld 2 and move outward in the radial direction by the release of the pressure air. The holding of the end side of the welded object 2 is released.

In this embodiment, the first and second inflow side flanges 14 and 16 of the first and second inflow portions 10 and 12 of the welded object 2 and the outflow side flange 20 of the outflow portion 18 are relative to the central axis of the welded object 2. It is provided eccentrically, and therefore when the weld 2 is held between the pair of weld support means 26, 28, it is held via the first and second support jigs 80, 82.

With reference to FIGS. 3 and 4, in the illustrated embodiment, the first support jig 80 is attached to one end side of the welded object 2, and the first support jig 80 is detachably attached to and detached from one welded object supporting means 26. A second support jig 82 is attached to the other end side, and the second support jig 82 is detachably held by the other welded object supporting means 28.

In this embodiment, the first support jig 80 has a plate-shaped first jig main body 84, and a cylindrical support protrusion 86 is provided on the back surface side of the first jig main body 84. One end side of the welded object 2 (in this form, the inflow side flanges 14 and 16 of the first and second inflow portions 10 and 12) is attached to the front side of the first jig body 84 by a mounting bolt (not shown) or the like. The chuck means 64 (three chuck claws 74a to 74c) of the first weld support means 26 holds the support protrusion 86 of the first support jig 80 attached to one end of the weld 2.

Further, the second support jig 82 has a plate-shaped second jig main body 88, and a cylindrical support protrusion 90 is provided on the back surface side of the second jig main body 88. The other end side of the welded object 2 (in this form, the outflow side flange 20 of the outflow portion 18) is attached to the front surface side of the second jig body 88 by a mounting bolt (not shown) or the like, and the second welded object supporting means. The chuck means 64 (three chuck claws 74a to 74c) of 28 holds the support protrusion 86 of the second support jig 82 attached to the other end of the weld 2.

By attaching the first and second support jigs 80 and 82 to both ends of the welded object 2, the required chuck gripping portions can be provided on both ends of the welded object 2, and the chuck gripping portions thus provided can be provided. The portion serves as the center of rotation when the welded object 2 is rotated, and is, for example, the first and second inflow portions 10, 12 (first and second inflow side flanges 14, 16) and the outflow portion 18 (outflow side flange 20). Is provided eccentrically with respect to the central axis of the welded object 2, by rotating the main shafts (not shown) (chuck means 64) of the welded object supporting means 26 and 28, the welded article. 2 can be rotated as required to perform welding described later.

In this embodiment, the welded object supporting means 26 and 28 are provided with the rotation blocking means 92. The illustrated rotation blocking means 92 includes a support housing 94 attached to the support body 62, and a pin member 96 is attached to the support housing 94. Further, a cylinder mechanism 98 (for example, a pneumatic cylinder mechanism) is arranged in the support housing 94, and the output portion 100 of the cylinder mechanism 98 is connected to the pin member 96. Further, in connection with the rotation blocking means 92, a receiving hole 102 (104) is provided in the first jig main body 84 (second jig main body 88) of the first support jig 80 (second support jig 82). Has been done.

With this configuration, when the output unit 100 of the cylinder mechanism 98 extends, the pin member 96 protrudes from the support housing 94 and the first jig body 84 (second jig body 88) protrudes from the support housing 94, as shown in FIG. ) Is inserted into the receiving hole 102 (104). In this inserted state of the pin member 96, the first support jig 80 (second support jig 82) is supported by the chuck means 64 of the welded support means 26 (28) and the pin member 96 of the rotation preventing means 92. Therefore, the relative rotation of the first support jig 80 (second support jig 82) with respect to the weld support means 26 (28), in other words, the relative rotation of the weld 2 with respect to the weld support means 26 (28). The rotation is surely prevented, and even if the welded object 2 is rotated, its positional deviation can be suppressed.

In this embodiment, the first support jig 80 is attached to one end of the welded portion 2, and the second support jig 82 is attached to the other end portion, but the first support jig 80 is attached to both ends of the welded object 2. When the chuck gripping portions corresponding to the support protrusions 86 and 90 of the second support jigs 80 and 82 are provided, the first and second support jigs 80 and 82 may be omitted.

Welding with this welding device is performed, for example, as follows. Mainly referring to FIGS. 2 and 4 to 6, when welding, the first support jig 80 is attached to one end (inflow side housing 6) of the welded object 2 and to the other end (outflow side housing 8). The second support jig 82 is attached. When the welded material 2 in such a state is placed on the mounting table 46 of the transport carriage 42, the housing body 4 of the welded material 2 is mounted and supported on the mounting table 46, as can be seen from FIG. The inflow side housing 6 protrudes from the mounting table 46 toward one weld supporting means 26, and the outflow side housing 8 protrudes from the mounting table 46 toward the other weld supporting means 28. ..

When the transport carriage 42 on which the welded object 2 in such a state is placed moves to the welding area 34 and the mounting table 46 rises to the mounting position, the states shown in FIGS. 2 and 4 are obtained (at this time, a pair). The chuck means 64) of the welded material supporting means 26 and 28 of the above is held in an open state). That is, the support protrusion 86 (functioning as a chuck gripping portion) of the first support jig 80 attached to one end of the welded object 2 faces the chuck means 64 of one of the welded object supporting means 26 (three). (Located in the central portion of the chuck claws 74a to 74c), the support protrusion 90 (functioning as the chuck grip portion) of the second support jig 82 attached to the other end portion of the other welded object supporting means 28. It faces the chuck means 64 (located in the center of the three chuck claws 74a to 74c).

Then, in such a state, the air chuck members 70a to 70c of the chuck means 64 of the welded object supporting means 26 and 28 are closed, and the chuck claws 74a to 74c move inward in the radial direction, and one of the welded objects is formed. The chuck claws 74a to 74c of the support means 26 chuck-hold the support protrusion 86 of the first support jig 80, and the chuck claws 74a to 74c of the other welding support means 28 chuck the support protrusion 90 of the second support jig 82. In this way, the weld 2 is held between the pair of weld support means 26, 28, as shown in FIGS. 2 and 4. After being held in this way, the mounting table 46 of the transport carriage 42 is lowered from the mounting position to the transport position.

Welding to the welded object 2 is performed in a state of being held by the pair of welded object supporting means 26 and 28 via the first and second supporting jigs 80 and 82. At the time of this welding, for example, the main shafts (chuck means 64) of the welded object supporting means 26 and 28 are rotated to position the welded object 2 so that the surface to be welded is on the upper side, and in this state, the welding arm of the welding robot 22 is positioned. Welding is performed while moving 52. At this time, since the welding robot 22 is attached to the upper support frame 50, the welding wire 54 attached to the welding arm 52 can be brought closer to the portion to be welded of the welded object 2 from above, thereby making a comparison. Welding can be done efficiently and cleanly.

For example, when the temporary joint between the housing body 4 and the inflow side housing 6 (or the temporary joint between the housing body 4 and the outflow side housing 8) is welded over the entire circumference, the welded object 2 is rotated by 90 degrees. By performing welding, welding can be performed neatly without causing welding defects. In particular, when welding the corners of the temporary joint, the upper surface of the temporary joint can be welded to a region slightly beyond the corners, and by welding in this way, the corners of the temporary joint can be welded. Welding defects that tend to occur in parts can be eliminated, and the housing can be welded and joined in a sealed state.

When the cross-sectional shape of the welded object 2 is, for example, a rectangular shape, welding can be performed while rotating the welded object 2 by, for example, 90 degrees, and when the cross-sectional shape is, for example, a hexagonal shape, for example, by 60 degrees. Welding can be done while rotating. Further, instead of rotating by a predetermined angle in this way, the welded object 2 is continuously rotated, and the arm 52 of the welding robot 22 is moved in conjunction with the rotation of the welded object 2. Welding may be performed continuously over the entire circumference of the welded object 2.

This welding device can perform welding on a plurality of types of welded objects by using a plurality of types of first and second support jigs. In the following description, the same members as those in the above-described embodiment are designated by the same reference numbers, and the description thereof will be omitted.

FIG. 7A shows the first and second support jigs 80 and 82 of the first embodiment, and the configurations of the first and second support jigs 80 and 82 are shown in FIGS. 1 to 6. It is substantially the same as that used for the welding equipment. A pair of welded object supporting means 80, 82 (see, for example, FIG. 2) for supporting the welded object 2 are installed and fixed on a floor surface F or the like of a factory, and therefore, such a pair of welded object supporting means 80, In order to hold the welded object 2 between the chuck means 64 of 82, the first is taken into consideration in consideration of the distance between the chuck means 64 and the length of the welded object 2 in the axial direction (left-right direction in FIG. 7A). The length of the second support jigs 80 and 82 in the rotation axis direction (left-right direction in FIG. 7A) is set.

In this embodiment, as shown in FIG. 7A, when the length of the welded object 2 in the axial direction is long, the first and second jig main bodies 84 of the first and second support jigs 80 and 82, Both ends of the weld 2 (specifically, the first and second inflow side flanges 14 and 16 and the outflow side flange 20) are directly attached to 88.

On the other hand, as shown in FIG. 7 (b), when the axial length of the weld 2A is shorter than that shown in FIG. 7 (a), the first and second supports of the second embodiment Jigs 80A and 82A are used. The first support jig 80A is composed of a plate-shaped first jig main body 84 and a first auxiliary jig 112 attached to the front surface side of the first jig main body 84. The first auxiliary jig 112 includes a plate-shaped first auxiliary jig main body 114 and a plurality of first spacers 116 for adjusting the distance between the first jig main body 84 and the first auxiliary jig main body 114. A plurality of first spacers 116 are attached to the surface side of the first jig main body 84, and the end portion of the inflow side housing 6A of the welded material 2A is attached to the front surface side of the first auxiliary jig main body 114 (specifically). The first and second inflow side flanges 14A, 16A) of the first and second inflow portions 10A, 12A are attached to the first and second inflow portions 10A, 12A.

Further, the second support jig 82A is composed of a plate-shaped second jig main body 88 and a second auxiliary jig 118 attached to the front surface side of the second jig main body 88. The second auxiliary jig 118 includes a plate-shaped second auxiliary jig main body 120 and a plurality of second spacers 122 that adjust the distance between the second jig main body 88 and the second auxiliary jig main body 120. A plurality of second spacers 122 are attached to the surface side of the second jig main body 88, and the end portion (specifically, Is attached with the outflow side flange 20A) of the outflow portion 18A.

As described above, in the first support jig 80A, the first auxiliary jig 112 is attached to the first jig main body 84, and in the second support jig 82A, the second auxiliary jig 118 is attached to the second jig main body 88. By attaching, the distance between the first and second support jigs 80A and 82A can be made to correspond to the axial length of the welded object 2A.

For example, when the axial length of the welded object is longer (or shorter) than the welded object 2A shown in FIG. 7 (b), as is easily understood, in the first support jig, the first auxiliary jig As the plurality of first spacers of the above, shorter (or longer) ones than those shown in FIG. 7B are used, and in the second support jig, FIG. 7 is used as the plurality of second spacers of the second auxiliary jig. A jig shorter (or longer) than the one shown in (b) may be used. That is, when welding a specific weld, the first and second specific support jigs corresponding to the axial length of the specific weld are selected, and the first specific support jig is attached to one end of the specific weld. The first specific support jig is detachably held by one weld support means 26, the second specific support jig is attached to the other end of the specific weld, and the second specific support jig is attached to the other. It will be detachably held by the welded object supporting means 28.

Next, a second embodiment of the welding apparatus will be described with reference to FIG. In this second embodiment, the support frame structure and related configurations have been modified.

In FIG. 8, the support frame structure 24B of the illustrated welding device has a pair of columnar members 48B fixed to the floor surface F or the like of a factory, and the upper ends of the pair of columnar members 48B are connected by an upper support frame 50B. This is a structure that supports both ends of the upper support frame 50B. The welding robot 22 is attached to the intermediate portion of the upper support frame 50B, and by adopting such a support structure at both ends, the strength of the support frame structure 24B can be increased, and the strength increase can be utilized. The welding robot 22 can be configured to be movable over a predetermined range in the axial direction (left-right direction in FIG. 8) on the upper support frame 50B.

Further, in the second embodiment, one of the pair of welded object supporting means 26B and 28, the welded object supporting means 26B, is attached to one columnar member 48B of the supporting frame structure 24B. That is, the support body 62B of one weld support means 26B is attached to one columnar member 48B, and the other weld support means 28 is attached to the floor surface F inside the other columnar member 48B of the support frame structure 24B. Installation is fixed. Other configurations of the welding apparatus including the pair of welded object supporting means 26B, 28 are substantially the same as those in the above-described embodiment.

In this welding apparatus, since one welding object supporting means 26B is attached to one columnar member 48B of the supporting frame structure 24B, the width of the welding apparatus (that is, the direction perpendicular to the conveying direction of the conveying carriage 42). The length) can be reduced, and the entire device can be miniaturized.

Instead of the above-described configuration, the other welded support means 28 may be attached to the other columnar member 48B of the support frame structure 24B, or the pair of welded support means 26B, 28 may be attached. It may be attached to the corresponding columnar member 48B of the support frame structure 24B.

Next, with reference to FIG. 9, a welding system using a plurality of the above-mentioned welding devices (two in this embodiment) will be described. In FIG. 9, in this welding system, a mounting area 32 is provided on one end side (left end side in FIG. 9) of the transport path 30C to which the transport carriage 42 is transported, and on the other end side (right end side in FIG. 9). A carry-out area 36 is provided, and first and second welding areas 34 and 35 are provided between the loading area 32 and the carry-out area 36. The configuration of the transport path 30C and the transport carriage 42 moved along the transport path 30C may be the same as that of the above-described embodiment.

In the welding system of this embodiment, a mounting lift (not shown) is arranged corresponding to the mounting area 32, and the welded object 2 to be welded is placed in the mounting area 32 by using the mounting area 32. It is mounted and supported on the mounting table 46 of the positioned transport carriage 42. The welded object 2 has, for example, the form shown in FIG. 1, and includes a housing main body 4, an inflow side housing 6 provided on one end side thereof, and an outflow side housing 8 provided on the other end side, and is welded. As described above, the first support jig 80 is attached to the inflow side housing 6 side, and the second support jig 82 is attached to the outflow side housing 8 side of the welded object 2.

In this embodiment, for example, the first welding apparatus 202 shown in FIG. 2 is installed corresponding to the first welding region 34, and the second welding apparatus 204 shown, for example, is shown in FIG. 8 corresponding to the second welding region 35. Is installed. That is, in the first welding area 34 (the transport carriage 42 is positioned at the position indicated by the alternate long and short dash line 42C), the welded object 2 conveyed by the conveyed carriage 42 is the pair of welded object supporting means 26 of the first welding apparatus 202. , 28. Further, a welding robot (not shown) is attached to the tip of the upper support frame 50 extending above the first welding region 34 from the columnar member 48 of the support frame structure 24, and the welding robot is a pair of welded object supporting means. Predetermined welding is performed on the welded object 2 held between 26 and 28.

In this embodiment, the welded object 2 is rotated by, for example, 90 degrees, and the temporary joint portion between the housing body 4 and the inflow side housing 6 and the temporary joint portion between the housing body 4 and the outflow side housing 8 are formed on each side surface thereof. Welding is performed, and such welding is performed over the entire circumference of these temporary joints, and thus the housing body 4, the inflow side housing 6 and the outflow side housing 8 are completely welded and joined.

Further, in the second welding area 35 (the transport carriage 42 is positioned at the position indicated by the alternate long and short dash line 42D), the welded object 2 conveyed by the conveyed carriage 42 is the pair of welded object supporting means 26B of the second welding apparatus 204. , 28. Further, an upper support frame 50B is connected to the upper ends of a pair of columnar members 48B of the support frame structure 24B, and the upper support frame 50B is laterally above the second welding region 35 (in the vertical direction in FIG. 9). , A direction perpendicular to the transport path 30C), and a welding robot (not shown) is attached to the middle portion of the upper support frame 50B, and the welding robot is installed between the pair of welded object supporting means 26B and 28. Predetermined welding is performed on the held welded object 2.

In this embodiment, the welded object 2 is rotated by, for example, 90 degrees, and a plurality of reinforcing ribs (not shown) temporarily joined to each side surface are welded to the housing body 4 on each side surface thereof. Welding of such reinforcing ribs is performed, for example, on all sides of the housing body 4, and thus the plurality of reinforcing ribs are completely welded together. In the second welding device 204, a welding robot (not shown) may be movably mounted on the upper support frame 50B of the support frame structure 24B in the axial direction (vertical direction in FIG. 9). With this configuration, the weldable range of the second welding area 35 can be widened.

Further, a carry-out lift (not shown) is provided in the carry-out area 36 (the transport carriage 42 is positioned at the position indicated by the alternate long and short dash line 42E), and the welded weld 2 is used for the carry-out lift. It is carried out from the mounting table 46 of the transport cart 42E located in the carry-out area 36, and is carried out of the welding system. In this welding system, the welded material 2 can be welded as required while the transport carriage 42 is transported from the loading area 32 to the carry-out area 36 through the first and second welding areas 34 and 35.

In the above-mentioned welding system, two welding devices (first and second welding devices 202 and 204) are installed along the transfer path 30C, but three or more welding devices are installed to weld the welded object 2. You may try to do it.

Further, in the above-described embodiment, the first welding device 202 (device for performing welding in the circumferential direction) is installed in the first welding area 34, and the second welding device 204 (welding in the rotation axis direction) is installed in the second welding area 35. However, on the contrary, even if the second welding device 204 is installed in the first welding area 34 and the first welding device 202 is installed in the second welding area 204. Alternatively, the first welding device 202 may be installed in the first and second welding areas 34 and 35, respectively, and the second welding device 204 may be installed in place of the first welding device 202, respectively.

Although the embodiments of the welding apparatus and the welding system according to the present invention have been described above, the present invention is not limited to these embodiments, and various changes or modifications can be made without departing from the scope of the present invention. ..

2,2A Welded material 22 Welding robot 24,24B Support frame structure 26,26B, 28 Welded material supporting means 30,30C Transport path 32 Mounting area 34 Welding area, 1st welding area 35 2nd welding area 36 Carrying out area 42 Transporting Cart 50, 50B Upper support frame 64 Chuck means 80, 80A, 82, 82A Support jig 84,88 Jig body 92 Rotation prevention means 112, 118 Auxiliary support jig 202 1st welding device 204 2nd welding device

Claims (6)

A support frame structure that supports the upper support frame arranged above the welding area of the transfer path of the welded material, a welding robot attached to the upper support frame, and the welding area corresponding to the welding area. A pair of welded object supporting means arranged on both sides of the transport path is provided, and each of the paired welded object supporting means rotates integrally with the spindle and the spindle rotatably supported by the support body. and a chuck means for moving and said at one end of the weldment is attached first support jig, the other end of the weldment is attached a second support jig, the pair of weldments support The support protrusion of the first support jig is detachably held by the chuck means of one of the weld support means, and the other weld support means of the pair of weld support means. A welding apparatus characterized in that a support protrusion of the second support jig is detachably held by the chuck means of the above. The first support jig is eccentrically attached to the one end side of the weld, the second support jig is eccentrically attached to the other end of the weld, and the weld is the first and first. 2. The welding apparatus according to claim 1, wherein the support jig is rotated around the support protrusion. There are a plurality of types of welded objects having different axial lengths, and a plurality of types of first and second support jigs having different axial lengths are prepared corresponding to the plurality of types of welded objects. , The first and second specific support jigs corresponding to the axial length of the specific weld are selected, the first specific support jig is mounted on one end side of the specific weld, and the specific weld is attached. The welding apparatus according to claim 2, wherein the second specific support jig is mounted on the other end side of the above. The support frame structure includes a pair of columnar members that support both ends of the upper support frame, and one of the pair of columnar members is attached to any one of the pair of welded object supporting means. The welding apparatus according to claim 1. The first and second welding regions are arranged along the conveying direction of the conveying path, and the first welding apparatus according to claim 1 or 2 is arranged corresponding to the first welding region. The second welding apparatus according to claim 1 or 2 is arranged corresponding to the two welding regions, and the first welding apparatus performs circumferential welding on the welded object in the first welding region, and the first welding apparatus. The 2 welding device is a welding system characterized in that the welded object is welded in the axial direction in the second welding area. The transport trolley is moved along the transport path through the first and second welding areas, and the transport trolley is moved to the trolley body moving along the transport path, and ascends from the transport position and the transport position to the trolley body. The welding system according to claim 5, further comprising a mounting table that can move up and down between the mounting position and the welding position, wherein the welded object is mounted and supported on the mounting table described above.

Images