KR102454456B1 - A Welder for spin basket of washing machine - Google Patents

Abstract

The present invention relates to a welder for a drum of a washing machine. The welder for a drum of a washing machine comprises: a lower cantilever arm (100); a jig slide unit (110) which is provided with jigs (112, 114) on front and rear ends to fix both ends of a drum (D) to be engaged; an upper cantilever arm (120); a clamp assembly (130) for pressing and fixing an upper surface of both ends of the drum (D) supplied by the jig slide unit (110); a locker (140) for preventing sagging of the clamp assembly (130) and the drum (D); a lift (150) which moves down when mounting the drum (D) to the jig slide unit (110) and moves up after welding is finished to detach the drum (D) from the jig slide unit (110); a welding torch assembly (160) which is installed on an upper part of the upper cantilever arm (120); and an operating box (170) for operating welding data monitoring and welding conditions in a welding process of the drum by the welding torch assembly (160). The welding torch assembly (160) goes forward and backward along an LM guide (122) installed in a longitudinal direction on the upper cantilever arm (120). The clamp assembly (130) is configured to move down while a pressing member (132) is fixed to the upper cantilever arm (120) with a hinge (131) and is rotated by an inflatable tube (134) to move up to an original position again by an air cylinder (133).

Description

Washing machine drum welding device {A Welder for spin basket of washing machine}

The present invention is to improve some problems found in the process of actually using the applicant's Patent Registration No. 10-1675546 'Washing Machine Drum Welding Apparatus', thereby solving welding defects and manufacturing a high-quality washing machine drum.

As a prior art related to the present invention, the applicant's Patent No. 10-1675546 'Washing Machine Drum Welding Device' is disclosed.

Patent Document 1 relates to a welding apparatus for bonding stainless steel plates in a drum state in order to manufacture a rotating drum inside a washing machine, which, as can be seen from the front view of FIG. When placed on the slide unit 110, the jigs 112 and 114 are put in in a temporarily fixed state, and the surfaces to be welded are abutted by the clamp 130, and then the welding torch assembly 160 is advanced to perform welding of the butt surfaces. By doing so, the welding is completed, and two welding machines are arranged in a set in the booth (B) so that the drum welding work and installation/removal work can be performed alternately left and right without time delay.

On the other hand, Patent Document 1 has a structure in which an air expansion tube is installed on the upper side of an LM guide clamp for clamping both ends of a washing machine drum, which is an object to be welded. The welding torch was attached to the end of the cantilevered arm of the 1-axis orthogonal robot, so when welding the tip of the drum, there was a problem that welding defects occurred due to vertical deviation and left and right flow of the tip of the welding torch. In the process of butt welding by the welding line, there was a problem such as an uneven gap, such as touching one side and not touching the other side, resulting in poor welding, etc. By manually adjusting the stroke of the air cylinder to adjust the guide width, the actual welding section does not match correctly, and welding defects due to various structural causes occur, which lowers the yield and productivity of the washing machine drum. This was discovered.

Korean Patent No. 10-1675546 (registered on Nov. 7, 2016)

The present invention has been devised to solve the above problems, and an object of the present invention is to improve the disadvantages found in 'Washing Machine Drum Welding Device' of Patent Document 1 to solve the welding defect, thereby manufacturing a high-quality washing machine drum. To provide a washing machine drum welding device.

In order to achieve the above object, the present invention provides a lower cantilever arm having an open side; a jig slide unit installed on the upper side of the lower cantilever arm to move forward and backward and having a jig fixed to the front and rear ends to engage both ends of the drum; an upper cantilever arm having an open side installed on the lower cantilever arm; a clamp assembly installed below the upper cantilever arm and configured to press and fix the upper surfaces of both ends of the drum supplied by the jig slide unit; a locker installed at the tip of the upper cantilever arm to prevent deflection of the clamp assembly and the drum during welding; a lift installed below the lower cantilever arm to descend when the drum is mounted on the jig slide unit, and to rise after welding is completed to remove the drum from the jig slide unit; a welding torch assembly installed on an upper portion of the upper cantilever arm to move forward and backward; and an operating box for monitoring welding data and manipulating welding conditions in the welding process of the drum by the welding torch assembly;

The welding torch assembly moves forward and backward along the LM guide installed on the upper cantilever arm in the longitudinal direction. This is made, and there is provided a washing machine drum welding apparatus configured to rise back to the original position by the contraction of the air cylinder.

According to an embodiment of the present invention, the vertical and horizontal fluctuations of the welding torch during the welding process of the washing machine drum, which is the object to be welded, the problem of inaccurate and non-uniform buttocks and clamping of the welding line, and the optimum position value control between the welding torch and the object to be welded at welding start In order to solve the problem of position change caused by the torch impact when the tip of the torch is touched to the object to be welded, the cause of welding defects can be solved, and a high-quality washing machine drum can be manufactured, and the occurrence of safety accidents can be prevented. there is

1 is a front view of a washing machine drum welding apparatus according to the present invention;
2 is a plan view of a washing machine drum welding apparatus according to the present invention;
3 is a side view of a washing machine drum welding apparatus according to the present invention;
4 is a front view of the clamp assembly and the torch traveling unit shown in FIG. 1;
5 is a plan view of the clamp assembly and the torch traveling unit shown in FIG. 2;
6 is a side view of the clamp assembly and the torch traveling unit shown in FIG. 3;
Fig. 7 is a front view of the welding torch assembly shown in Fig. 1;
Fig. 8 is a front view of the lower cantilever arm shown in Fig. 1;
9 is a plan view of the lower cantilever arm shown in FIG. 2;
10 is a front view of the jig slide unit;
11 is a front view of the lift;
12 is a plan view of the lift;
13 is a front view of a conventional drum welding apparatus.

Hereinafter, preferred embodiments that do not limit the present invention will be described in detail with reference to the accompanying drawings.

1 to 12 show a washing machine drum welding apparatus according to an embodiment of the present invention.

As shown in the drawings, the washing machine drum welding apparatus according to the present embodiment includes a lower cantilever arm 100 with one open side; a jig slide unit 110 installed on the upper side of the lower cantilever arm 100 to move forward and backward and having jigs 112 and 114 for fixing both ends of the drum D to engage the front and rear ends; an upper cantilever arm 120 with an open side installed on the lower cantilever arm 100; a clamp assembly 130 installed on the lower side of the upper cantilever arm 120 and for pressing and fixing the upper surfaces of both ends of the drum D supplied by the jig slide unit 110; a locker 140 installed at the tip of the upper cantilever arm 120 to prevent deflection of the clamp assembly 130 and the drum D during welding; A lift installed on the lower side of the lower cantilever arm 100 to descend when the drum D is mounted on the jig slide unit 110, and rise after welding is completed to remove the drum D from the jig slide unit 110. 150); a welding torch assembly 160 installed on the upper cantilever arm 120 to move forward and backward; and an operating box 170 for monitoring welding data and manipulating welding conditions in the welding process of the drum by the welding torch assembly 160;

The welding torch assembly 160 moves forward and backward along the LM guide 122 installed in the longitudinal direction on the upper cantilever arm 120 , and the clamp assembly 130 includes the pressing member 132 on the upper cantilever arm 120 . ) is fixed with a hinge 131 and is rotated by the expansion of the air expansion tube 134 to descend and clamp, and to rise back to the original position by the contraction of the air cylinder 133 .

In this embodiment, the welding torch assembly 160 is attached to the cantilevered arm of the uniaxial orthogonal robot of Patent Document 1, and the LM guide installed in the longitudinal direction on the upper cantilever arm 120, unlike the method in which the arm moves as the arm expands and contracts. As it slides along the 122 and moves stably horizontally, the vertical deviation and left and right flow of the end of the welding torch 161 are minimized, thereby solving the problem of poor welding.

In addition, in this embodiment, the welding torch assembly 160, as shown in FIG. 7, the position setting bracket 163 to which the welding torch 161 is fixed is a vertical guide 162a by the lifting motor 162. It is not fixed as it is to the lifting block 162b that is lifted along the , but is made to be buffered in the vertical direction by the vertical fixing bolt 162c and the spring 162d. ) to solve the problem that the position change of the welding torch 161 occurs due to the impact received when the end of the base material (drum) comes into contact.

In the drawings, reference numeral 162e denotes that the spring 162d is contracted when the welding torch 161 and the base material are in contact, and the positioning bracket 163 is lifted from the lifting block 162b to the upper part and then returned to the original position to enable stable lifting and lowering. guide block for

Further, reference numerals 164, 165, and 166 denote a camera for photographing the welding state of the welding torch 161, a light-shielding film, and an air cylinder for opening and closing the light-shielding film, respectively.

The jig slide unit 110 is installed on the upper side of the lower cantilever arm 100 whose one side is open as shown in FIGS. 8 to 10 so as to move forward and backward together with the lower cantilever arm 100, and the lower cantilever At the rear end of the arm 100, two inner jigs 112 are installed on the left and right sides thereof, and the front end of the lower cantilever arm 100 is raised and lowered by servo motor driving actuators 111 and 113 on the left and right sides. and two outer jigs 114 for forward and backward movement are installed, and a guide 116 on which the upper end of the drum is mounted is provided on the upper surface of the lower cantilever arm 100, so that one operator can press and draw. After the stainless steel plate (D; hereinafter, also referred to as "drum") is rolled up in a cylindrical shape and placed on the guide 116, the stainless steel plate (D) is placed on the inner jigs 112 on the left and right sides of the rear end. Insert the setting grooves, respectively, and raise and advance the left and right outer jigs 114 of the tip so that the drum (D) can be seated on the jig slide unit 110 by inserting the setting grooves on the other side of the stainless steel plate (D). do.

On the other hand, the left and right outer jigs 114 of the front end are locked by a pedal switch (not shown), so the operator places a stainless steel plate on the guide 116 and puts it on the inner jig 112 at the rear end. After fitting the setting groove while looking at the eye, if the pedal switch is pressed, the setting groove is set in the setting groove by the servo motor driving actuators 111 and 113 and the locking operation is performed.

In such a state, the parts to be welded on both sides of the stainless steel plate D are not exactly abutted, and after the upper clamp assembly 130 descends by its own weight, the center stopper provided in the jig slide unit 110 . One side clamp assembly 130 is clamped in a state where 117 is raised by the air cylinder 118, and before the other clamp assembly 130 is clamped, the inner and outer jigs 112 and 114 of the one side (left side in the drawing) are After sliding in the left and right direction so that the welding part of the drum is completely in close contact, the other side clamp assembly 130 is clamped, and then welding is performed.

The inner jig 112 and the outer jig 114 constituting the jig slide unit 110 are each made of one pair of left and right, and the position of the jig of one side (right or lower side in the drawing) of the inner jig 112 is It is in a fixed state, and the left jig of the inner jig 112 is slidable in the left and right directions by the servo motor driving actuator 115 ′.

In addition, the outer jig 114 also has a jig on one side (right or lower side in the drawing) so that only up-and-down and forward and backward movements are made, but the left outer jig is added to the servomotor driving actuator 115. Since the sliding operation can be made left and right by the left and right sliding operation of the inner and outer jigs 112 and 114, the part to be welded of the drum (stainless steel plate) is brought into close contact with each other and then clamped.

On the other hand, the inner and outer jigs 112 and 114, which are slid left and right by the servo motor driving actuators 115 and 115', are provided with a shock absorber for absorbing the shock received when the welding line of the drum is abutted, which is shown in FIG. As shown, when the left and right sliding operation of the left jig (114; 112 is not shown), the buffer can be made in the horizontal direction by the horizontal fixing bolt (115a) and the spring (115b).

In this embodiment, the pressing method by the left and right movement of the inner and outer jigs 112 and 114 for the welding line butt is performed by using the servomotor driving actuators 115 and 115' instead of the conventional air cylinder, so that the pressing force of the inner and outer jigs 112 and 114 is used. As the pressing force can be adjusted while balancing the , welding defects that may have occurred when welding is performed in a state where the welding line is not properly butted can be eliminated.

The drum temporarily fixed to the jig slide unit 110 enters the booth B by the jig slide unit 110 and the cantilever arm 100 , and at this time, at the lower side of the lower cantilever arm 100 . As the installed lift 150 rises, the clamp assembly 130 installed at the lower part of the upper cantilever arm 120 descends, so that the welded portion of the drum is exactly abutted.

The clamp assembly 130 is installed symmetrically on the lower left and right sides of the upper cantilever arm 120 as shown in FIG. 6, and a pressing member 132 that presses both ends of the welding part of the drum D, respectively. Up and down movement is possible by the air cylinder 133 and the air expansion tube 134 , and the pressing member 132 is raised by the contraction of the air cylinder 133 , and when descending, the air By extension of the cylinder 133, the pressing member 132 is rotated and lowered and at the same time the air expansion tube 134 is expanded. .

In this embodiment, the pressing member 132 is fixed to the upper cantilever arm 120 by a hinge 131 and is rotated by the air expansion tube 134 to descend while being rotated, and to rise back to the original position by the air cylinder 133. Since the hinge 131 consists of a pressing member 132a rotated by the air cylinder 133 and a pressing member 132b rotated by the air expansion tube 133 in upper and lower layers, the hinge ( 131) is also formed in a double top and bottom.

As shown in FIG. 4 , the locker 140 includes a bracket 142 , one end of which is rotatably pin-coupled to the free end of the upper cantilever arm 120 , and the air coupled to the middle of the bracket 142 . Consists of a cylinder 143, the bracket 142 is formed with a locking hole 144 into which a locking pin (not shown) protruding from the tip of the lower cantilever arm 100 is fitted, so that the air cylinder 143 can be expanded or contracted. It is switched from the dismantled state to the locked state by operation, and welding work is performed, and after welding is completed, it is returned to the unlocked state.

In this embodiment, the lift 150 is provided with guides 151 and 152 for supporting the left and right sides of the drum D. In Patent Document 1, the guides 151 and 152 use air cylinders, respectively, depending on the diameter of the drum. In this embodiment, as shown in FIGS. 11 and 12 , the left and right guides 151 and 152 in one servomotor 153 are simultaneously driven by the ball screws 154 and 155 to automatically adjust the left and right widths. to adjust the guide width, the lift 150 is raised and lowered by a servo motor 156, and moves forward and backward by a sliding motor 158.

In the welding device according to this embodiment, a locking device 180 is provided on the door R on the side of the booth B to prevent an outsider from entering the booth and operating it in order to promote the safety of the operator from the machine. , Two monitors 190 for monitoring the welding state inside the booth are provided to monitor the welding devices on the left and right, respectively, and a screen that is closed when the object to be welded enters the inside of the booth (B) ( S) is made of an electric roll screen method, so that the opening and closing operation is made up and down.

For reference, the conventional screen was composed of a combination of an air cylinder and a chain, so that smooth operation was not made during operation.

Since the basic operation sequence of the washing machine drum welding apparatus of this embodiment configured as described above is substantially the same as that of the welding apparatus of Patent Document 1, a detailed description thereof will be omitted.

As described above, in the drum welding apparatus according to the present embodiment, since the welding torch assembly moves horizontally along the LMR guide installed on the upper cantilever arm, it is possible to prevent vertical and horizontal fluctuations at the end of the welding torch, and the inner and outer jigs is slid left and right by the servomotor driven actuator and at the same time the distance between the butt welds can be kept constant by the shock absorber. Since the clamping is performed with a uniform force over the entire section, the problem of welding defects can be solved, and a buffer device is also provided on the welding torch side, so the problem of position change of the welding torch that may occur when it comes into contact with the object to be welded is also solved. By improving, there is an advantage in that it is possible to manufacture a high-quality washing machine drum by solving the causes of various welding defects.

1: Welding device
100: lower cantilever arm
110: jig slide unit
111,113: servo motor driving actuator
112: inner jig
114: outer jig
115,115' : servo motor driven actuator
115a: horizontal fixing bolt
115b: spring
116 : guide
117: center stopper
118: air cylinder
120: upper cantilever arm
122: LM guide
130: clamp assembly
131: hinge
132, 132a, 132b: pressing member
133: air cylinder
134: air expansion tube
140 : rocker
142: bracket
143: air cylinder
144: locking hole
150: lift
151,152: Guide
153: servo motor
156: servo motor
158: sliding motor
160: welding torch assembly
161: welding torch
162: elevating motor
162a: vertical guide
162b: elevating block
162c: vertical fixing bolt
162d : spring
162e: guide block
163: position setting bracket
164 : camera
165: light shield
166: air cylinder
170: operating box
180: door lock
190 : monitor
B: booth
D: drum
R: door
S: screen

Claims (7)

The lower cantilever arm 100 with one side open; a jig slide unit 110 installed on the upper side of the lower cantilever arm 100 so as to move forward and backward and provided with jigs 112 and 114 for fixing both ends of the drum D to engage both ends at the front and rear ends; an upper cantilever arm 120 with an open side installed on the lower cantilever arm 100; a clamp assembly 130 installed on the lower side of the upper cantilever arm 120 and for pressing and fixing the upper surfaces of both ends of the drum D supplied by the jig slide unit 110; a locker 140 installed at the tip of the upper cantilever arm 120 to prevent deflection of the clamp assembly 130 and the drum D during welding; A lift installed on the lower side of the lower cantilever arm 100 to descend when the drum D is mounted on the jig slide unit 110, and to rise after welding is completed to remove the drum D from the jig slide unit 110. 150); a welding torch assembly 160 installed on the upper cantilever arm 120 to move forward and backward; and an operating box 170 for monitoring welding data and manipulating welding conditions in the welding process of the drum by the welding torch assembly 160, wherein the welding torch assembly 160 includes an upper cantilever arm 120 The forward and backward operation is made along the LM guide installed in the longitudinal direction, and the clamp assembly 130 has a pressing member 132 fixed to the upper cantilever arm 120 by a hinge 131 to expand the air expansion tube 134 . In the washing machine drum welding device, which is rotated by the , it is clamped by descending, and is raised to the original position again by the contraction of the air cylinder (133),
In the jig slide unit 110, the inner jig 112 and the outer jig 114 are made of one pair of left and right, respectively, and the position of one of the inner and outer jigs 112 and 114 is fixed. The jig of the other side of the outer jigs 112 and 114 slides in the left and right directions by the servo motor driving actuators 115 and 115'. is buffered in the horizontal direction by the horizontal fixing bolt 115a and the spring 115b during the left and right sliding operation to absorb the shock received when the welding line of the drum is abutted, and the lift 150 is the left and right side of the drum (D) A drum welding apparatus for washing machine, characterized in that the guides (151, 152) supporting both sides are simultaneously driven by the ball screws (154, 155) rotated by one servomotor (153) so that the width can be adjusted. delete delete delete delete delete delete

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