JP2571905Y2 - Automatic welding equipment for butt ends of longitudinal parts with different shapes - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic welding apparatus for welding a butted end of a sword such as a Western knife and a handle.

[0002]

2. Description of the Related Art In a Western tableware knife as shown in FIG. 8, a sword portion M and a handle portion N are separately manufactured, and then both are TIG.
It is manufactured by welding.

[0003]

Conventionally, a sword M and a handle N are fitted into holders 1 and 2 on a set table 1 as shown in FIG. 9 and bolts 4 of a fixing jig 3 are tightened. Are set in abutting state, and in this state, the two parts are temporarily welded, and then the main welding is performed. Since this setting work is performed by hand, the sword M and the handle N are positioned so that they can be welded. There is a problem that it takes time and effort to set, and the product yield is not good.

The present invention has been made in order to solve this problem.
It is only necessary to place two members in the mold, and the subsequent work including temporary welding and main welding is automatically executed according to a predetermined sequence, and a shape that can greatly improve efficiency and yield compared to the past It is an object of the present invention to provide an automatic welding apparatus for abutting ends of longitudinal parts which differ from each other.

[0005]

In order to achieve the above object, the present invention comprises a first jig holder having a clamper which can be opened and closed with respect to a lower die. The jig holder has a rotating shaft extending in a horizontal direction. A first automatic clamp unit having a clamp which can be opened and closed with respect to the lower mold, and a second jig holder opposed to the first jig holder and left and right at a predetermined distance from the first jig holder; A second automatic clamp unit capable of sliding, a rotation drive mechanism capable of reversing the rotation axis by 90 °, a reciprocating drive mechanism for moving the second automatic clamp unit forward and backward, and a welding robot; The lower mold and the clamper protrude the welding-side end of the first member to the above-mentioned predetermined distance, hold the first member, and hold the second member.
The lower mold and the clamper of the jig project the welding-side end of the second member to the above-mentioned predetermined distance to hold the second member, and the welding robot holds the first member in the horizontal posture which is held and pressed against each other. A first step of temporarily welding the outer peripheral portion of the butted end of the member and the second member, and a second step of fully welding the temporarily welded portion of the first member and the second member in the vertical position. After the temporary welding, the first automatic clamp unit releases the clamp, and the first automatic clamp unit is rotated by 90 °.

[0006]

According to the present invention, after the first member and the second member are set in the respective molds, the two members are clamped, butted, moved to the welding position, temporarily welded to the welded portion, and the book at the same welding position. Welding is performed automatically.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

1, 2, 3, 4 and 5, A and A ′ denote an automatic clamping unit on the handle side, and B and A ′.
B ′ is an automatic clamping unit on the blade side, D and D ′ are member setting stations, and E and E ′ are welding stations. 101 is a welding robot 100A, 100 shown in FIG.
B, a welding torch attached to the arm 103 via a torch holder 102;
4A is a teaching board, 105 is a welding power source, 106 is a machine side control device, and 107 is a device stand. The torch holder 102 has an inverted L-shape, and the welding torch 101 can rotate by plus or minus 90 degrees with respect to the center O so that the θ axis 103 of the robot can be rotated.
It is attached to A. In FIG. 3, reference numeral 108 denotes a wiring;
Is a machine-side control power supply, 110 is a compressed air source, 111 is a two-piece suspended light shield plate (shown in FIG. 7) having a slit S, 10 is a fixed base, and 11 is a movable base of the unit. Two guide rails 12A and 12B are formed on the fixed base 10 in two pairs. Movable base 11
Bearings 11A and 11B capable of running on the guide rails 12A and 12B are provided on the lower surface of the movable base 11, and the automatic clamp unit A on the handle portion side is spaced apart from the movable base 11 at a predetermined interval. An automatic clamp unit B on the blade side is mounted. The movable base 11 is driven from the member setting stations D and D 'to the welding stations E and E', respectively, and vice versa by a drive mechanism having a base reciprocating drive cylinder device 13. 13A is a rod of the cylinder device 13. Reference numeral 1415 denotes a shock absorber and a stopper for the movable base 11, respectively.

Reference numeral 20 denotes a jig holder on the handle side of the automatic clamp unit A (or A '), which has a shape of a horizontal base, and has a bearing 21 mounted on one end thereof. A rotation support shaft 22 extends horizontally from a side surface of the rotation shaft 21. The rotation support shaft 22 is connected to a pneumatic rotation drive mechanism 25 via a bearing 24 fixed on a support member 23. A mold base 27A of the lower handle portion 27 is fixed on the jig holder 20 with a plurality of bolts, and the upper portion of the lower handle portion 27 can be fitted with a handle portion N as shown by a broken line in the figure. A simple mold K1 is formed. Reference numeral 28 denotes a clamper, which is formed in a key shape including a clamper portion 28A and an arm portion 28B, and the lower end of the arm portion is supported by a rotating shaft 29. The rotating shaft 29 extends from one end of the jig holder 20 to the other end, and is supported by the bearing 21.
A pinion 30 is attached to the end. This pinion 30 is engaged with a rack 32 attached to a rod 31A of a clamping cylinder 31. Clamp cylinder 31
Are attached to the jig holder 20. Clamper 28
The clamp member 33 has a bolt 34 on the clamper portion 28A.
It is mounted in. A mold K2 into which a part N1 of the handle N can be fitted is formed on the lower surface of the clamp member 33.

Reference numeral 40 denotes a jig holder on the side of the sword of the automatic clamp unit B (or B '), which has a shape of a horizontal base, and has a bearing 41 mounted on one end thereof. On the jig holder 40, a mold base 37A of the lower knife section 37 is fixed with a plurality of bolts, and the upper knife section 37 can be fitted with a knife section M as shown by a broken line in the figure. A simple mold K3 is formed. Reference numeral 38 denotes a clamper, which is formed in a key shape including a clamper portion 38A and an arm portion 38B, and the lower end of the arm portion is supported by a rotating shaft 39.
The rotary shaft 39 extends from one end of the jig holder 40 to the other end, is supported by the bearing 41, and a pinion 50 is attached to the end. This pinion 50
Engages with the rack 52 attached to the rod 51A of the clamping cylinder 51. The clamping cylinder 51 is attached to the jig holder 40. A clamper member 53 is attached to a clamper portion 38 </ b> A of the clamper 38 with a bolt 54. A mold K4 to which a part M1 of the blade portion M can be fitted is formed on the lower surface of the clamp member 53.

The jig holder 40 is fixed on a slide plate 55. The slide plate 55 has two sliders 56 extending in the axial direction of the rotation support shaft 39. Is formed with a slide groove 57 that engages with the slider 56. Reference numeral 58 denotes a sword / shaft pressing cylinder, the tip of which is connected to a slide plate 55 by a rod 58A.
9 in the axial direction.

The machine-side control device 106 is mounted on the device gantry 107 and controls the clamping cylinders 31 and 51 and the rotation drive mechanism 25 according to a predetermined sequence.

Next, the operation of this device will be described.

At the member setting station D, with the clampers 28 and 38 open, the handle N is set in the mold K1 of the lower handle 27 and the knife M is set in the mold K3 of the lower knife 37. Then, when the worker presses a clamp push button (not shown), the machine-side control device 106 executes the following sequence.

(1) The machine-side control device 106 gives a forward movement command to the clamping cylinders 31 and 51. This allows
Each of the rods 31A, 51A of the cylinders 31, 51 contracts, the clampers 28 and 38 rotate, and the clamper member 33,
The mold surfaces of 53 are pressed against the mold surfaces of the lower handle portion 27 and the upper blade portion 37, respectively, to clamp the handle N and the sword M immovably.
In this clamped state, the welding-side end N 'of the handle N and the welding-side end N' of the sword M are respectively the handle lower mold 27,
The end faces of the clamp member 33, the lower knife section 37, and the end face of the clamper member 53 project by a predetermined length, and the projecting end faces of the two are almost in contact with each other. (2) When the clamping operation is completed, the machine-side control device 1
06 gives an operation command to the sword / shaft pressing cylinder 58 to move the pressing rod 58A forward. As a result, the slide plate 55 is pushed toward the jig holder 20, and the end faces of the welded portion (indicated by P in FIG. 7) of the handle portion N and the sword portion M are pressed against each other, and are pressed against each other.

(3) When the pressing of the handle N against the sword M by the pressing rod 58A is completed, the control device 106 gives a command to the cylinder device 13 of the base moving mechanism to move forward.
The movable base 11 is slid to the welding station E. When it is detected that the movable base 11 is positioned at the welding station E, the welding robot 100 executes a temporary welding program based on a command from the robot controller 103, and the welding torch 101 of the welding robot 100 is shown in FIG. Move from work set position (1) to welding position (2).

(4) The welding torch 101 operates according to the teaching program, and when the welding at the welding point P1 in FIG. 6 is completed,
Withdrawing (3) → ascending (4) → inverting 180 ° (5) → descending (6), moving from this position to the welding position (7), welding the welding point P2 and retracting (8).

(5) When the temporary welding is completed, the welding torch 101 is retracted to the standby position, the clamper 38 is opened, and the clamp for the sword M is released.

(6) When the clamping of the sword N is released, the rotation driving mechanism 25 rotates 90 ° in response to a command from the control device 106, and the automatic clamping unit A stands up.
The sword portion M of the temporarily welded handle portion N assumes the vertical posture shown in FIG.

(7) When the automatic clamping unit A stands up, the welding robot 100 executes the main welding program based on a command from the robot controller 103, and the welding torch 101 moves from the standby position (1) shown in FIG. Then, while orbiting around the welded portion P (3), the entire circumference of the welded portion P is welded and retracted to the standby position.

(8) Since the apparatus shown in FIGS. 1 and 2 is of a dual type consisting of No. 1 line and No. 2 line, while the automatic clamping unit A and the automatic clamping unit B are at the welding station E, the automatic clamping unit A ' , The automatic clamping unit B ′ is located at the member setting station D ′, and the operation of setting members to the automatic clamping unit A ′ and the automatic clamping unit B ′ is performed.

As described above, in this embodiment, the lower mold for fitting the sword M and the lower mold for fitting the handle are used.
And the setting operation of the handle portion N is significantly simplified as compared with the related art.

Further, since the end surfaces of the sword portion M and the handle portion N are pressed against each other by the pressing rod 58A, a finish in accordance with the standard can always be easily obtained.

In this embodiment, since the temporary welding and the main welding are performed at the same welding station using the same welding robot, the efficiency is high and the cost for the welding robot is reduced.

In the above embodiment, the case where the sword portion M and the handle portion N of the western-style knife are welded and connected has been described. However, the present invention is not limited to this. The same effect can be obtained by using for butt-end welding of members.

[0026]

As described above, the present invention requires labor only when the first member and the second member are set, and the setting work is performed only by placing the member in the lower mold. Since the subsequent work is automatically executed in accordance with a predetermined sequence, the efficiency can be greatly improved and the yield can be improved as compared with the related art.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a plan view showing an embodiment of the present invention.

FIG. 3 is a diagram showing a positional relationship between a unit and a welding robot in the embodiment.

FIG. 4 is a side view showing a posture of a unit during temporary welding in the embodiment.

FIG. 5 is a side view showing the posture of the unit during the main welding in the embodiment.

FIG. 6 is a diagram showing a path of a welding torch at the time of temporary welding in the embodiment.

FIG. 7 is a front view of the light shielding plate in the embodiment.

FIG. 8 is a plan view of a Western-style knife.

FIG. 9 is a perspective view for explaining a conventional sword / handle setting method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Fixed base 11 Movable base 13 Cylinder device for base drive 12A, 12A Guide groove 12B, 12B Linear bearing 20 Handle side jig holder 21 Bearing 22 Rotation support shaft 24 Bearing 25 Rotation support mechanism 27 Lower handle 27A type base 28 Clamper 29 Rotating shaft 31 Clamping cylinder 33 Clamp member 21 Bearing 22 Rotation support shaft 37 Lower blade part 37A type base 38 Clamper 39 Rotating shaft 40 Blade holder 51 Clamping cylinder 53 Clamping member 55 Slide plate 56 Slider 58 Pressing Cylinder 106 Machine-side control device 107 Device gantry 100 Welding robot 101 Welding torch 103 Robot control device A, A 'Handle-side automatic clamp unit B, B' Sword-side automatic clamp unit D, D 'Member set Shon E, E 'welding station P welded portion M blade portion N shank

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B23K 37/04-37/053 B23K 9/00 501

Claims (1)

(57) [Scope of request for utility model registration] 1. A first automatic clamp unit having a first jig holder having a clamper that can be opened and closed with respect to a lower mold, the jig holder having a rotation axis extending in a horizontal direction, and opening and closing with respect to the lower mold. A second automatic clamp unit having a possible clamper and having a second jig holder opposed to the first jig holder and left and right at a predetermined interval and slidable in the rotation axis direction; A rotating drive mechanism capable of reversing 90 °, a reciprocating drive mechanism for moving the second automatic clamp unit forward and backward, and a welding robot, wherein the lower mold and the clamper of the first jig holder are configured to hold a welding side end of the first member. Projecting to the predetermined distance to clamp the first member, the lower mold and the clamper of the second jig holder projecting the welding side end of the second member to the predetermined distance to clamp the second member, The above welding b A first step of temporarily welding the outer peripheral portions of the butted ends of the first member and the second member in a horizontal position, which are clamped and pressed together, and a first member that is temporarily welded and is in a vertical position. A second step of fully welding the welded portion of the second member is performed, the first automatic clamp unit releases the clamp after the temporary welding, and the second automatic clamp unit starts the second step after the release. An automatic welding device for butt ends of longitudinal parts having different shapes, characterized in that they are rotated by 180 ° before.