JP2016034667A - Welding apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus that enables an operator to work in an easy posture, can make effective use of space inexpensively, and has high production efficiency with a short processing time.SOLUTION: A control panel 6 outputs an operation signal to a jig 4 in a work welding region X2 so that, when welding a welding spot on the welding robot 5 side of work-pieces W1, W2, the jig 4 in the work welding region X2 is tilted in the radially inner direction of a rotary table 3, and when welding a welding spot on the farther side from the welding robot 5 of the work-pieces W1, W2, the jig 4 in the work welding region X2 is tilted in the radially outer direction of the rotary table 3.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a welding apparatus used in, for example, an automobile production line.

  2. Description of the Related Art Conventionally, a vehicle body of an automobile is integrally assembled by positioning a plurality of press-formed workpieces on a jig and joining them by various welding.

  For example, a welding apparatus for a vehicle body disclosed in Patent Document 1 includes a rotary table that can rotate around a rotary shaft that extends in the vertical direction, and is spaced 180 ° in the circumferential direction near the outer periphery of the upper surface of the rotary table. Two jigs are placed with a gap. The two jigs are in a state where the rotary table is stopped, one is located in the work welding area and the other is located in the work setting area, and a welding gun is attached to the tip of the arm in the work welding area. One robot is installed.

  Then, when welding the workpiece positioned on one jig with the above welding robot, the workpiece to be assembled next is set on the other jig and positioned in advance, and the welding operation of one jig is completed. Then, the rotary table is rotated 180 ° to move one jig to the work set area and the other jig to the work welding area. After that, the work of the other jig is welded by the welding robot, while the work assembly is taken out from the one jig moved to the work setting area, and the work to be assembled next is set in one jig. Production efficiency is improved by positioning.

Japanese Unexamined Patent Publication No. 7-185827 (paragraphs 0008 to 0016 and FIG. 1)

  However, in the welding apparatus of Patent Document 1, when setting a workpiece on the jig, it is necessary to move the workpiece from the upper side to the lower side of the jig, and the operator manually sets the workpiece from the side of the rotary table. If you do, it will be an unreasonable working posture and a heavy load will be applied to the body. In order to avoid this, it is conceivable to perform the work positioning operation by adding an industrial multi-axis robot or the like, but this increases the cost and requires a space for installing the multi-axis robot or the like.

  Further, in Patent Document 1, when welding a place far away from the welding robot, there is a possibility that welding cannot be performed depending on the shape of the workpiece because the welding robot has a limited movable range.

  The present invention has been made in view of such a point, and an object of the present invention is to enable an operator to work in an easy posture, to effectively use a space at low cost, and to reliably weld a workpiece. It is to provide a welding apparatus that can be performed.

  In order to achieve the above object, the present invention is characterized in that a jig placed on a rotary table is tilted.

  That is, in the first invention, the rotary table is supported by the rotary shaft extending in the vertical direction and rotates between the work setting area and the work welding area, and the rotation table is spaced from the outer periphery of the upper surface of the rotary table. A plurality of jigs provided to position the workpiece so that the posture can be changed, a welding robot installed in the workpiece welding area, and connected to the rotary table and the jigs, and operate on the rotary table and the jigs. And a control means for outputting a signal. The control means outputs an operation signal to the rotary table so that the jigs move to the work set area and the work welding area, and the work set area is cured. An operation signal is output to the jig in the work set area so that the tool tilts toward the operator side, and the welding part on the welding robot side of the work is welded. In this case, the workpiece welding region jig tilts radially inward of the rotary table, while the workpiece welding region jig rotates when the welding part of the workpiece far from the welding robot is welded. An operation signal is output to the jig in the work welding region so as to tilt outward in the radial direction of the table.

  According to a second invention, in the first invention, the jig includes a gripping tool for gripping the workpiece and a support base for supporting the gripping tool, and the rotary table radial center lower portion of the support base is The rotary table is supported so as to be tiltable by a horizontal axis extending in a direction intersecting the radial direction of the rotary table.

  In a third invention, in the first or second invention, the control means outputs an operation signal to the rotary table, and at the same time, applies to each jig in the work set area and the work welding area in the next step. An operation signal is output so that a necessary posture can be taken.

  According to a fourth aspect, in the first or second aspect, the control means operates the jigs so that the jigs are tilted radially inward of the rotary table before rotating the rotary table. A signal is output.

  In the first invention, when a work is set on the jig, the work set area of the jig is directed toward the operator side by tilting the jig in the work setting area toward the operator side of the rotary table. Accordingly, the operator can move the workpiece from the side of the rotary table toward the jig substantially horizontally or obliquely, and the posture of the operator during the work setting work becomes easy, and the work setting work Therefore, it is not necessary to add a multi-axis robot or the like, and space can be saved at low cost. Also, for example, when the welding location is far away from the welding robot, the welding location far from the welding robot approaches the welding robot by tilting the workpiece welding area jig toward the welding robot, and the movable range of the welding robot Therefore, the workpiece can be reliably welded.

  In the second invention, each jig tilts in a balanced manner toward the outer side and the inner side of the rotary table with the shaft portion interposed therebetween, so that an unreasonable posture of the welding robot during welding can be reliably reduced.

  In the third aspect of the invention, since the tilt of the jig can be changed using the time during which the rotary table is rotating, the line tact can be shortened.

  In the fourth aspect of the invention, when the rotary table rotates, each jig does not protrude outward from the outer peripheral edge of the rotary table. Therefore, each jig is attached to piping or wiring cables of equipment installed on the side of the rotary table. It is possible to avoid the tools from interfering with each other, and the radius of rotation of the rotating portion of the welding apparatus is reduced, so that the space can be used effectively.

It is a front view of the welding apparatus which concerns on embodiment of this invention. It is a front view which shows the state immediately after rotating a rotary table and moving each jig | tool to a workpiece | work setting area | region and workpiece | work welding. FIG. 3 is a front view of a welding apparatus showing a state in which an operator takes out a workpiece assembly from a jig in a workpiece setting area from the state of FIG. 2 while a welding robot is performing welding in the workpiece welding area. FIG. 4 is a front view showing a state in which an operator sets an unwelded workpiece on a jig in a workpiece setting region from the state of FIG. 3 while a welding robot is performing welding in the workpiece welding region.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiment is merely exemplary in nature.

  FIG. 1 shows a welding apparatus 1 according to an embodiment of the present invention. The welding apparatus 1 is an apparatus that is arranged on an automobile production line and assembles two press-formed workpieces W1 and W2 together by spot welding.

  The welding device 1 is positioned on the ground and has a first motor 2 having a rotary shaft 2a extending in the vertical direction, a circular rotary table 3 supported by the rotary shaft 2a, and the workpieces W1 and W2. Two jigs 4 are provided, with the rotation axis of the rotary table 3 sandwiched between them, the left side of FIG. 1 is the work set region X1 where the workpieces W1 and W2 are set on the jig 4, and the right side of FIG. , W2 is a workpiece welding region X2, and the rotary table 3 is rotated between the workpiece setting region X1 and the workpiece welding region X2 in the R1 direction (forward rotation) and in the R2 direction (reverse rotation). ) And alternately.

  The jigs 4 are provided at 180 ° intervals in the circumferential direction near the outer periphery of the upper surface of the turntable 3, and a pair of gripping tools 41 for gripping the overlapped parts of the workpieces W 1 and W 2, A substantially plate-like support base 42 that supports the gripping tool 41 is provided.

  The lower central part of the support table 42 in the radial direction of the rotary table is supported to be tiltable by a horizontal shaft 43 extending in a direction intersecting the radial direction of the rotary table 3.

  A second motor 44 is drivingly connected to the horizontal shaft 43, and the horizontal shaft 43 is rotated forward and backward by the rotational drive of the second motor 44, and the workpieces W 1 and W 2 gripped by the grippers 41. Can be positioned so that the posture can be changed.

  One welding robot 5 comprising an industrial multi-axis robot with a welding gun 5c attached to the tip of the arm 5b is installed on the side of the rotary table 3 and in the workpiece welding region X2, and the welding gun 5c is provided. It is possible to perform welding by changing the posture of the machine freely.

  A control panel 6 (control means) is connected to the first motor 2 of the rotary table 3 so that the jigs 4 move to the work set area X1 and the work welding area X2. An operation signal is output to one motor 2.

  Further, the control panel 6 is connected to the second motor 44 of each jig 4 so that the jig 4 in the work set region X1 tilts toward the worker H1 as shown in FIGS. An operation signal is output to the second motor 44 of the jig 4 in the workpiece setting area X1, and the workpiece welding area is tilted according to the welding location of the workpieces W1 and W2 while the jig 4 in the workpiece welding area X2 is tilted. An operation signal is output to the second motor 44 of the jig 4 of X2.

  Further, the control panel 6 outputs an operation signal to the first motor 2 of the rotary table 3 so that the rotary table 3 starts to rotate from a stopped state, and at the same time, the jig 4 in the work set area X1 is supplied with the rotary table. The operation signal is output to the second motor 44 of the jig 4 in the work set region X1 so as to start to incline inward in the radial direction 3.

  In this embodiment, the operation signal is output only to the second motor 44 of the jig 4 in the work set region X1 at the same time as the operation signal is output to the first motor 2 of the rotary table 3. Not only that, but the operation signal is output to the first motor 2 of the rotary table 3, and at the same time, the jigs 4 in the work setting area X1 and the work welding area X2 can take a necessary posture in the next process. An activation signal may be output.

  Next, assembly of the workpieces W1, W2 in the welding apparatus 1 will be described.

  FIG. 2 shows that immediately after the rotary table 3 rotating (forward) in the R1 direction stops, the jig 4 that holds the assembly 10 in which the workpieces W1 and W2 are assembled together is tilted outward of the rotary table 3. In this state, the jig 4 positioned in the workpiece setting region X1 and positioned by positioning the workpieces W1 and W2 is positioned in the workpiece welding region X2 while being tilted inward of the turntable 3.

  From the state shown in FIG. 2, first, as shown in FIG. 3, in the workpiece welding region X2, the welding robot 5 of the workpieces W1 and W2 positioned on the jig 4 by changing the posture of the welding gun 5c. Weld the overlapping welds on the side.

  On the other hand, while the welding robot 5 is welding the overlapped portions of the workpieces W1 and W2 on the welding robot 5 side, the worker H1 takes out the assembly 10 from the jig 4 in the workpiece setting region X1.

  Next, when the welding of the overlapped parts of the workpieces W1 and W2 on the welding robot 5 side by the welding robot 5 is completed, as shown in FIG. The operation signal is output to the second motor 44 of the jig 4 so as to be inclined outward.

  In the workpiece welding region X2, the welding robot 5 changes the posture of the welding gun 5c and welds a welding location far from the welding robot 5 of the workpieces W1 and W2 positioned on the jig 4.

  On the other hand, while the welding robot 5 is welding a welding location far away from the welding robot 5 of the workpieces W1 and W2, in the workpiece setting region X1, the workpiece W1 and W2 to be welded next by the worker H1 are jigs 4. Set to.

  Thereafter, when the welding of the workpieces W1 and W2 far away from the welding robot 5 by the welding robot 5 is completed and the assembly 10 is completed, the control panel 6 rotates the rotary table 3 in the R2 direction ( An operation signal is output to the second motor 44 so that the jig 4 in the work set region X1 starts to tilt inward in the radial direction of the rotary table 3 at the same time. To do.

  Then, when the rotary table 3 rotated in the R2 direction stops, the state returns to the state shown in FIG. 2, and then the assembly of the workpieces W1 and W2 is performed by repeating the above-described procedure.

  As described above, according to the embodiment of the present invention, when the workpieces W1 and W2 are set on the jig 4, the jig 4 in the work setting area X1 is inclined toward the worker H1 side of the turntable 3 so that the workpiece of the jig 4 is set. The set location faces the worker H1 side. Accordingly, the worker H1 can move the workpieces W1 and W2 from the side of the rotary table 3 toward the jig 4 substantially horizontally or obliquely, and the posture of the worker H1 during the work setting work can be increased. In addition to making it easier, it is not necessary to add a multi-axis robot or the like for work set work, and space can be saved at low cost. For example, when the welding location is far away from the welding robot 5, the welding location far from the welding robot 5 approaches the welding robot 5 by tilting the jig 4 in the workpiece welding region X <b> 2 toward the welding robot 5. Since the welding robot 5 enters the movable range, the workpieces W1 and W2 can be reliably welded.

  In addition, since each jig 4 tilts in a balanced manner toward the outer side and the inner side of the rotary table 3 with the horizontal shaft 43 interposed therebetween, the unreasonable posture of the welding robot 5 during welding can be reliably reduced.

  Furthermore, since the tilt of the jig 4 can be changed using the time during which the turntable 3 is rotating, the line tact can be shortened.

  In the above embodiment, the jig 4 in the work set region X1 starts to tilt inward in the radial direction of the rotary table 3 at the same time as the rotary table 3 starts to rotate from the stopped state. Instead, for example, before the control panel 6 rotates the turntable 3, an operation signal may be output to each jig 4 so that each jig 4 tilts radially inward of the turntable 3. Then, when the turntable 3 rotates, each jig 4 does not protrude outward from the outer peripheral edge of the turntable 3, so that each jig is connected to piping or wiring cables of equipment installed on the side of the turntable 3. The tool 4 can be prevented from interfering with each other, and the radius of rotation of the rotating portion of the welding apparatus 1 is reduced, so that the space can be effectively used.

  In the embodiment of the present invention, the two jigs 4 are provided on the upper surface of the turntable 3. However, the present invention is not limited to this, and three or more may be provided at intervals around the rotation shaft 2a.

  Further, a plurality of welding robots 5 installed in the workpiece welding region X2 may be provided.

  In the embodiment of the present invention, there is one worker H1, but a plurality of workers H1 may work in the work set area X1.

  In the embodiment of the present invention, the workpieces W1 and W2 are assembled by spot welding. However, the present invention is not limited to this, and may be performed by arc welding or laser welding, or may be performed by other welding.

  Further, in the embodiment of the present invention, each jig 4 is inclined in the radial direction of the turntable 3. However, the present invention is not limited to this, for example, only in the radial direction of the turntable 3 using a universal joint or the like. Alternatively, it may be inclined in other directions.

  The present invention is suitable for, for example, a welding apparatus used in an automobile production line.

DESCRIPTION OF SYMBOLS 1 Welding apparatus 2a Rotating shaft 3 Rotating table 4 Jig 5 Welding robot 6 Control panel (control means)
41 gripping tool 42 support base 43 horizontal axis H1 worker X1 work set area X2 work welding area W1, W2 work

Claims (4)

A rotary table supported by a rotary shaft extending in the vertical direction and rotating between a work set area and a work welding area;
A plurality of jigs that are provided near the outer periphery of the upper surface of the rotary table and spaced in the rotational direction, and position the workpiece so that the posture can be changed;
A welding robot installed in the workpiece welding area,
A control means connected to the rotary table and each jig, and outputting an operation signal to the rotary table and each jig;
The control means outputs an operation signal to the rotary table so that each jig moves to the work set area and the work welding area, and the jig in the work set area tilts toward the operator side. While outputting an operation signal to a jig in the work set area, and when welding a welding part on the welding robot side in the work, the jig in the work welding area is tilted radially inward of the rotary table, When welding a welding part of the workpiece far from the welding robot, an operation signal is output to the workpiece welding region jig so that the workpiece welding region jig tilts radially outward of the rotary table. It is comprised, The welding apparatus characterized by the above-mentioned. The welding apparatus according to claim 1,
The jig includes a gripping tool that grips the workpiece, and a support base that supports the gripping tool.
The welding apparatus characterized in that the rotary table radial center lower portion of the support base is tiltably supported by a horizontal axis extending in a direction intersecting the radial direction of the rotary table. The welding apparatus according to claim 1 or 2,
The control means outputs an operation signal to the rotary table and at the same time outputs an operation signal to each jig in the work setting area and the work welding area so that a necessary posture in the next process can be taken. Welding equipment. The welding apparatus according to claim 1 or 2,
Prior to rotating the rotary table, the control means outputs an operation signal to the jigs so that the jigs are tilted radially inward of the rotary table.

Images