JP6410086B2 - Rotating electric machine winding welding equipment - Google Patents

Description

  The present invention relates to a welding apparatus that joins ends of conductor segments to form a winding of a rotating electrical machine.

  The winding of the stator of the rotating electrical machine is formed by joining the ends of conductor segments protruding from the end face of the stator slot. The ends of the conductor segments are evenly arranged on the circumference at the end face of the stator, but the work diameter, the number of winding layers, and the layer pitch differ depending on the type of the stator, so the junction between the ends of the conductor segments The position of is different for each type of stator.

  A technique for joining the ends of the conductor segments by welding is disclosed in Patent Document 1, for example.

  In the technique disclosed in Patent Document 1, a welding torch attached to a robot arm and in a fixed state has a relatively large physique welding jig equipped with a large number of electrodes connected to each conductor segment together with a stator. By rotating at a constant speed, the ends of the conductor segments are continuously welded together.

JP 2008-154433 A

  However, in the technique of Patent Document 1 described above, a welding jig having a relatively large physique is used in accordance with each stator in order to cope with various stators having different numbers of conductor segments, workpiece diameters, and layer pitches. There is a problem in that it is necessary to exchange, making the setup complicated and spending a long time.

  In order to solve such a problem, the welding jig can be fixedly arranged and the welding torch can be rotated by a robot. However, in that case, the rotation of the welding torch does not have high accuracy and constant speed, and the welding quality between the conductor segment terminals decreases.

  The present invention has been made in view of the above-described problems, and provides a welding apparatus for a rotating electrical machine winding in which a welding torch revolves at a high accuracy and at a constant speed with the same diameter as that of a welded portion to weld the welded portion. The purpose is to provide.

In order to achieve the above object, the invention according to claim 1, wherein the ends of the conductor segments (24a to d) of the stator (5) are in contact with each other, and are annularly arranged uniformly on the end face of the stator. A rotating electrical machine winding welding apparatus (1) having a welding torch (2) for welding a welded portion (54) to form a stator winding of the rotating electrical machine, wherein the stator is fixedly disposed And a setup device (3) for moving and positioning the welding torch in the radial direction of the annular array of the welded portions, and the welding torch having the same diameter as the diameter (D1, D2) of the annular array of the welded portions. A revolving mechanism (16) for revolving together with the set- up device at the set-up position; and a support portion (38) for supporting the welding torch so as to be able to rotate at the set-up position of the set-up device. It is characterized by.

According to this configuration, in the welding apparatus (1) for the rotating electrical machine winding, the stator (5) is fixedly arranged, and the welding torch (2) is moved in the radial direction of the annular array of the welds (54). With the setup device (3) and the setup device (3) at the setup position where the welding torch (2) is positioned at the same diameter as the diameter (D1, D2) of the annular array of the welded portion (54). A revolving mechanism (16) for revolving. Therefore, the welding torch can be rotated with high accuracy at a constant speed, and an excellent effect of improving the welding quality of the welded portion is achieved. In addition, since the stator is fixedly disposed, an electrode rotation mechanism is not required, so that the welding jig can be reduced in size, and the setup work when replacing the stator is facilitated. Moreover, since the torch support base (38) is provided as a support portion that supports the welding torch so that it can rotate at the setup position of the setup device, it receives excessive tension from an electric wire or the like connected to the welding torch. Therefore, the revolution of the welding torch can be executed easily and with high accuracy.

It is a front view which shows the whole structure of the welding apparatus of the rotary electric machine winding | winding which concerns on embodiment of this invention. It is a left view which shows the partial structure of the welding apparatus of the rotary electric machine winding | winding which concerns on embodiment of this invention. It is an expanded partial sectional view which shows the form which the welding torch in FIG. 1 moved to the setup position which can be welded in detail with a setup apparatus and a friction provision apparatus. It is a top view which expands and shows the stator which IV-IV arrow views in FIG. It is a top view which expands the VV arrow in FIG. 1, and shows the setup state which a welding torch engages with a setup device. It is an enlarged plan view which shows the revolution state which a welding torch does not engage with a setup apparatus as another form in FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. However, the same reference numerals are given to the portions corresponding to each other in all the drawings in this specification, and the description of the overlapping portions will be omitted as appropriate.

  As shown in FIGS. 1 to 4, a rotating electrical machine winding welding apparatus 1 embodying the present invention includes a stator 5 of a rotating electrical machine (not shown) fixedly arranged on a gantry 50 so that the end face is horizontal, and The annular array of the welded portions 54 is arranged so that the welded electrodes 54 and the weld electrodes 25 face each other, and the end portions of the conductor segments 24a to 24d of the stator 5 are in contact with each other and are evenly arranged on the end surface of the stator 5. The welding torch 2 is arranged so as to be revolved in the radial direction and is arranged at a setup position positioned at the same diameter as the diameters D1 and D2 of the annular array of the welded portions 54. The welding device 1 is covered with a casing (not shown) that can be freely opened and closed.

  As shown in FIGS. 3 and 4, the conductor segments 24 a to 24 d are accommodated in slots 47 provided in the axial direction of the stator 5 of the rotating electrical machine so that the terminal portions protrude from the end surfaces. The ends of the conductor segments 24a to 24d are adjacent to each other in the radial direction of the stator 5 outside the end face of the slot 47, thereby forming a welded portion 54. The weld 54 is welded by the welding torch 2 to become a winding, and a stator winding is formed. The welded portions 54 with which the ends of the conductor segments 24a and 24b are in contact with each other are arranged in an annular shape having a diameter D1 on the end face of the stator 5 so as to maintain a slight gap between the welded portion 54 and the welding electrode 25. The welding torch 2 is disposed on the side. Further, the welded portions 54 with which the ends of the conductor segment 24c and the conductor segment 24d abut are arranged in an annular shape with a diameter D2 on the end face of the stator 5, and a slight gap is provided between the welded portion 54 and the welding electrode 25. A welding torch 2 is arranged to keep. These welds 54 are welded and joined by the welding torch 2. As shown in FIG. 4, in the present embodiment, the winding layer is described as an example of two layers having a diameter D1 and a diameter D2, but the number of winding layers may be three or more. Of course, the diameter and layer pitch of the winding layers differ depending on the type of the stator.

  As shown in FIG. 3, the welding torch 2 performs TIG (Tungsten Inert Gas) welding on the welded portion 54 where the ends of the conductor segments 24 a to d are in contact with each other. In the welding torch 2, the terminals of the conductor segments 24 a to 24 d contact each other by energization from the power connector 26 to the welding electrode 25 made of tungsten in the atmosphere of argon gas which is an inert gas supplied from the gas connector 27. An arc is generated between the welding portion 54 and the welding electrode 25 that are in contact with each other, and welding is performed by melting the welding portion 54 with this arc heat. The air connector 28 is for supplying air to the welding torch 2.

  As shown in FIG. 1, the welding torch 2 is attached to the attachment plate 20 via the setup device 3. The mounting plate 20 is installed between four bushes 22 that slide on four support columns 21 erected on a linear guide 23 with the frame plate 19 installed on the end surface. Further, a ball nut 49 is fixed to the mounting plate 20, and a ball screw 48 screwed with the ball nut 49 is driven and controlled by the servo motor 9 through the pulley 13, the belt 17 and the pulley 14. With such a configuration, the servo motor 9 can maintain the gap between the welded portion 54 and the welding electrode 25 stably and with high accuracy.

  As shown in FIG. 3, the setup device 3 includes a servo motor 10 fixed to the mounting plate 20, a ball screw 32 connected to the output shaft of the servo motor 10, a ball nut 33 screwed into the ball screw 32, A housing 34 that houses the ball nut 33 and is slidably movable with respect to the mounting plate 20, an arm 35 that is fixed to the front end of the housing 34 and has a guide groove 37, and a cam follower 36 that engages with the guide groove 37. The torch support base 38 that includes the cam follower 36 and the friction applying device 4 and supports the welding torch 2.

  The welding torch 2 is fixed to the base 30 in a state where electrical insulation is ensured by the fasteners 29. The base 30 is attached to the torch support base 38 via a bearing 31. With such a configuration, the welding torch 2 is rotatable (spinned) with respect to the torch support base 38. The torch support base 38 constitutes the support portion of the present invention.

  As shown in FIGS. 3 and 5, the servo motor 12 controls the pulley disk 16 via the pulley 15 and the belt 18 by directly rotating the pulley disk 16 so as to be concentric with the central axis of the stator 5. An annular support member 41 is fixed to the lower surface of the pulley board 16. A bearing 40 is provided between an annular connecting member 39 fitted and fixed to the mounting plate 20 and the support member 41. A torch support base 38 is provided on the upper surface of the pulley disc 16 so as to be slidable in the radial direction of the pulley disc 16, that is, in the radial direction of the annular arrangement of the welded portions 54. From such a configuration, the welding torch 2 is controlled by being directly rotated and driven by the servo motor 12, unlike the case of being indirectly driven and controlled by an articulated robot or the like, so that the diameter D1 or the diameter D2 is controlled. It is possible to rotate (revolve) stably and with high precision at an arbitrary diameter as described above. The pulley board 16 constitutes the revolution mechanism of the present invention.

  As shown in FIGS. 3 and 5, the friction applying device 4 includes a gate-shaped frame 45 that slides in contact with both side surfaces of the torch support base 38 and stands on the upper surface of the pulley board 16, and the torch support base 38. A friction plate 46 provided inside the frame 45 so as to be in contact with the upper surface of the frame 45, a plurality of guide rods 42 standing on the friction plate 46 and penetrating the ceiling portion of the frame 45, and the ceiling portion of the frame 45 and the friction plate 46. And a presser screw 44 that is inserted between the spring rod 43 and the guide rod 42, and a pressure screw 44 that is erected on the friction plate 46 and screwed into a portion that penetrates the ceiling portion of the frame 45.

  According to this configuration, the distance between the ceiling portion of the frame 45 and the friction plate 46 can be increased or decreased by the rotation of the nut, so that the pressing force of the spring 43 to the friction plate 46 can be increased and decreased, and the torch of the friction applying device 4 The frictional force with respect to the support base 38 can be adjusted. Therefore, the setup position in the radial direction of the stator 5 of the torch support base 38 positioned by the setup device 3 can be reliably held.

  As shown in FIGS. 1 and 2, the linear guide 23 erected on the support column 21 can be moved horizontally by the servo motor 11 via a ball screw 52 and a ball nut 53. When the stator 5 is attached to the gantry 50 installed below the attachment plate 20, the column 21 is moved by the linear guide 23 in the back direction perpendicular to the paper surface of FIG. 1 (leftward in FIG. 2). 19 and the mounting plate 20 are retracted from above the mount 50. An electric wire guide 51 is provided in order to prevent excessive deformation caused by movement of the column 21 such as electric wires connected to the welding torch 2 and the servo motors 9, 10, and 12.

  A shaft 8 is provided at the center of the gantry 50 so as to be concentric with the center hole of the stator 5. A shaft driving device 7 that moves the shaft 8 up and down is provided at the lower end of the shaft 8. The upper end portion of the shaft 8 has a funnel shape, and when the shaft 8 is moved downward by the shaft driving device 7, an electrode (not shown) is moved radially outward by the taper of the funnel portion to form the conductor segment 24a. Contact. The other electrodes (not shown) are configured to move toward the center of the stator 5 by driving the electrode pressing device 6 to contact and press the conductor segment 24d. That is, both electrode groups are pressed against each weld 54 in the radial direction of the stator 5, and a welding current is supplied from a power source (not shown).

(Welding torch setup process)
As shown in FIGS. 1, 3, and 5, the cam follower 36 of the torch support base 38 is engaged with the guide groove 37 of the arm 35. In this state, the torch support base 38 is positioned by driving and controlling the servo motor 10 so that the revolution diameter of the welding electrode 25 is equal to the diameter D1 of the welding portion 54. As shown in FIG. 3, the positioning of the diameter D2 with respect to the welded portion 54 is performed by moving the torch support base 38 leftward by the servo motor 10 by a distance corresponding to half of the difference between the diameter D2 and the diameter D1. The The servo motor 10 is selected to generate a torque that can move the torch support base 38 against the frictional force generated by the friction applying device 4.

(Welding process of welding torch)
After the setup process of the welding torch, the servomotor 12 is controlled so that the welding electrode 25 revolves at a predetermined constant speed to rotate and drive the welding torch 2 in order to stably and uniformly weld each welding portion 54. . At this time, as shown in FIG. 6, the cam follower 36 is detached from the guide groove 37. Therefore, the friction applying device 4 holds the set-up position where the welding torch 2 is positioned.

  The electric wires and hoses connected to the power connector 26, the gas connector 27, and the like generate tension due to their own weight and the revolution of the welding torch 2. This tension causes the welding torch 2 to rotate. Further, since this tension exists also in the direction in which the friction force of the friction applying device 4 acts, it is preferable that the friction applying device 4 is adjusted so that the friction force is at least larger than the tension.

  As is clear from the above detailed description, in the rotating electrical machine winding welding apparatus 1 of the present embodiment, the stator 5 is fixedly arranged, and the welding torch 2 is moved in the radial direction of the annular array of the welded portions 54. And a setup device 3 for positioning the welding torch 2 as a revolving mechanism for revolving the welding torch 2 together with the setup device 3 at a setup position where the welding torch 2 is positioned at the same diameter as the diameters D1 and D2 of the annular array of the welded portion 54. And a board 16. Therefore, the welding torch 2 can be rotated with high accuracy at a constant speed, and an excellent effect of improving the welding quality of the welded portion 54 is achieved. In addition, since the stator 5 is fixedly arranged, an electrode rotation mechanism is not required, so that the welding jig can be reduced in size, and the setup work at the time of replacing the stator is facilitated.

  In addition, since the torch support base 38 is provided as a support portion that supports the welding torch 2 so that it can rotate at the setup position of the setup device 3, it receives excessive tension from an electric wire or the like connected to the weld torch 2. And the revolution of the welding torch can be executed easily and with high accuracy.

  Further, since the setup device 3 is engaged with the welding torch 2 at the time of setup for changing the revolution diameter of the welding torch 2, and is not engaged with the welding torch 2 at the time of revolution of the welding torch 2, the welding torch 2 is very effectively used. Can be positioned.

  Moreover, since the setup device 3 includes the friction applying device 4 that holds the setup position of the welding torch 2 with a frictional force, the setup position where the welding torch 2 is positioned can be held very effectively.

  Further, since the revolution of the welding torch 2 is directly driven and controlled by the servo motor 12, the welding torch 2 can weld each welded portion 54 stably and uniformly.

  In addition, this invention includes what can be implemented in the aspect which added various change, correction, improvement, etc. based on the knowledge of those skilled in the art. Further, it goes without saying that any of the embodiments to which the above-mentioned changes are added is included in the scope of the present invention without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Welding apparatus 2 Welding torch 3 Setup apparatus 4 Friction imparting apparatus 5 Stator 9-12 Servo motor 16 Pulley machine (revolution mechanism)
24a-24d Conductor segment 38 Torch support base (support part)
54 Welded part

Claims (4)

The ends of the conductor segments (24a to d) of the stator (5) are brought into contact with each other, and welded portions (54) that are annularly and uniformly arranged on the end face of the stator are welded to form a stator winding of the rotating electrical machine. A rotary electric machine winding welding device (1) provided with a welding torch (2) to be formed,
The stator is fixedly arranged;
A setup device (3) for moving and positioning the welding torch in the radial direction of the annular array of the welds;
A revolving mechanism (16) for revolving the welding torch together with the set-up device at a set-up position positioned at the same diameter as the diameter (D1, D2) of the annular array of the welds ;
A support portion (38) for supporting the welding torch so as to be capable of rotating at a setup position of the setup device;
A rotating electrical machine winding welding device comprising: 2. The rotation according to claim 1 , wherein the setup device is engaged with the welding torch at the time of setup for changing the revolution diameter of the welding torch and is not engaged with the welding torch at the time of revolution of the welding torch. Electric wire welding equipment. The said setup device is provided with the friction provision apparatus (15) which hold | maintains the setup position of the said welding torch with a frictional force, The welding apparatus of the rotary electric machine winding of Claim 1 or 2 characterized by the above-mentioned. 4. The rotating electrical machine winding welding apparatus according to claim 1 , wherein the revolution of the welding torch is directly driven and controlled by a servo motor (12).

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