KR100261322B1 - Ultrasonic fusion welding method of multi-layer fusion structure and its apparatus - Google Patents

Abstract

PURPOSE: A supersonic welding machine is provided to improve the concentricity and the straightness and to remove a partial welding defect by precisely welding a multi-stage serial welding structure. CONSTITUTION: An upper clamper(140) and a lower clamper(150) control clamping positions and clamping force of each cell precisely. The upper clamper(140) and the lower clamper(150) contain pairs of clamp jaws(141,142:151,152) to be connected with pairs of cylinders(141,141:151,151) separably and to be adjusted each position. Sequential reciprocators(160,165,180,190) fall and restore a supporting jig(170) at the same line as the center line of pressurizing force by a tool hone(252). Thereby, the quality and the productivity are improved.

Description

Ultrasonic welding device of multi-stage series welding structure

The present invention relates to an ultrasonic welding device of a multi-stage series welding structure, in which a series of N-stage cells are sequentially welded by pressing and welding them with an ultrasonic tool horn by loading them one by one on the top to produce a multi-stage series welding structure such as an air conditioner fan. The present invention relates to an ultrasonic welding device for a multi-stage series welding structure that can achieve precise welding of a multi-stage series welding structure, improve concentricity and straightness, and eliminate local welding defects.

In general, a multi-stage series structure made of synthetic resin such as a long air conditioner fan is composed of multiple stage cells in terms of product strength, vibration, noise reduction, manufacturing, etc., and a multi-stage series welding structure is completed by ultrasonic welding each cell of each stage. do.

An example of a conventional ultrasonic welding machine for ultrasonically welding such a multi-stage series welding structure is shown in FIGS. 1 to 3 (published as Patent Application Publication No. 95-1692).

In FIG. 1, the guide rails 210 are fixed to both sides of the main body 200 of the ultrasonic welding machine from the lower part to the upper part, and the fixing plate 230 is interposed between the fixing rails 220 in the middle of the guide rail 210. The guide rail 210 is separated into the upper guide rail 210a and the lower guide rail 210b up and down by the fixing plate 230.

The lower guide rail 210b is installed such that the jig supporting member 260 divided into the upper plate 262 and the lower plate 264 is guided up and down, and has a single-stage cell B1 at the center of the upper plate 262. A supporting jig 270 is installed to support and load at a predetermined position, and the female screw member 265 is fixed to the rear of the central portion of the lower plate 264, and the female screw member 265 is provided with a bearing ( The jig support shaft 280 supported by 282 is screwed so that the jig support member 260 is lowered in step with the welded cells in accordance with the rotation of the jig transport shaft 280 to weld the cells of each stage. After the previous cell is welded, it is returned to its original position for welding of the next structure. As shown in FIG. 3, the jig feed shaft 280 is configured to be shifted from the center of the fixed jig 270 so that the lifting and lowering of the jig support member 260 is not hindered. 284, a motor 290 is provided adjacent to the timing belt 300 to transmit the rotation of the motor 290 to the jig feed shaft 280, so that the jig in accordance with the rotation of the motor 290 is provided. The support member 260 is made up and down.

In addition, the upper guide rail 210a has a tool horn support member 250 having a tool horn 252 for firing ultrasonic waves directly onto the bonded structure such that the lifting of the cylinder 255 fixed to the upper surface of the main body 200 is guided. Is installed.

On the other hand, after the one-stage cell (B1) is loaded on the support jig 270, the two-stage cell (B2) is loaded in the center of the fixing plate 230 so as to maintain a predetermined position through the cup-shaped support cup Fixing jig 240 is provided. In addition, the supporting jig 270 is rotatably installed with respect to the upper plate 262 via the bearing 266, so that the welded cells are rotated by the rotational torque caused by the vibration during welding.

In addition, the controller 310 controls the generation of ultrasonic waves, the operation of the cylinder 255 and the rotation of the jig feed shaft 280 so that a series of multi-stage cells are welded.

The conventional ultrasonic welding machine is composed of the upper guide rail (210a) and the lower guide rail (210b) is integrally formed so that the center of the upper tool horn 252 and the lower fixing jig 270 is accurately maintained In addition, the elevated cells are further configured to compensate for the rotation forks generated during welding by rotating the welded cells together with the supporting jig 270 due to the rotational force by the ultrasonic wave or the like, so that the accuracy of welding can be determined.

However, as shown in FIG. 4, the gap d between the three-stage cell B3 is not required because at least the clearance D for sliding is required between the fixing jig 240 and the four-stage cell B4. There is a problem that can occur, the longer the problem is more severe. As a result, not only the concentricity and straightness of the welded multi-stage welded structure are lowered, but also local welding defects occur, and particularly, vibration and noise are severely generated during rotational movement, and durability is degraded. have.

In addition, the horizontal and vertical degrees of the supporting jig 270 changes as the jig supporting member 260 descends, thereby causing the above-described problem to be severe. Further, as shown in FIG. 4, the center of the supporting jig 270 supporting the welded cells and the center of the jig feed shaft 280 are alternately applied to apply rotational torque to the cells welded by the pressing force of the tool horn 252. The slip is generated in the bath welding portion, causing further welding failure or lowering concentricity and straightness.

Therefore, the invention is to solve the infrequent problem, by loading one by one in the upper step by pressing and welding with an ultrasonic tool horn to weld a series of N single cells in sequence to produce a multi-stage series welding structure such as an air conditioner fan. The purpose of the present invention is to provide an ultrasonic welding device for a multi-stage series welding structure that can improve the concentricity and straightness by removing the local welding structure by precise welding of the series welding structure.

1 is a longitudinal cross-sectional view showing in detail the structure of the conventional ultrasonic welding machine of a multi-stage series welding structure.

2 is a partially enlarged view showing the structure of the ultrasonic welding portion of FIG. 7 in detail.

3 is a cross-sectional view taken along line 3-3 of FIG.

4 is an enlarged cross-sectional view of a fixing jig for explaining the problem of the ultrasonic welding machine of FIG.

5 is a longitudinal cross-sectional view of the ultrasonic welding device of a multi-stage series welding structure showing one embodiment of the apparatus in which one embodiment of the method according to the present invention is applied to FIG.

6 is a partially enlarged view specifically showing the structure of the ultrasonic welding portion of FIG.

Figure 7 is a schematic diagram of a welded couple for laying out the ultrasonic welding method of a multi-stage series welding structure according to the present invention.

8 is a diagram showing the lines 8-8 of FIG. 5, showing the upper and lower clamp devices.

9 is a cross-sectional view taken along the line 9-9 of FIG.

* Explanation of symbols for main parts of the drawings

100, 277: main body 110,210: guide rail

120,220: Fixed block 130,230: Fixed plate

140: upper clamp device 142,152: clamp jaw

150: lower clamp device 160,260: jig support member

162,262: Upper plate 164,264: Lower plate

170,270: Supporting jig 165,264: Female thread member

180,280: Feed shaft 190,290: Motor

190 ′, 284: Gear 240: Fixed jig

250: tool horn support member 252: tool horn

310: controller

Ultrasonic welding apparatus of a multi-stage series welding structure according to an embodiment of the present invention for achieving the object of the present invention, a support jig for loading the lowermost one-stage cell of the welding structure in a predetermined position; Stepwise reciprocating means for lowering and restoring the supporting jig step by step: between the clamping position and the release position, welding from the first single cell to the (N-1) single cell sequentially as the supporting jig descends at the clamping position A lower clamp device for fixing one welding cell directly below the unit to a predetermined position; And an upper clamp device for fixing one of the to-be-welded cells sequentially to a predetermined position as the supporting jig descends when the to-be-welded cell to be welded to a predetermined position on the welding cell is loaded. The upper clamp device and / or the lower clamp device may be configured to precisely adjust the clamp position and / or clamp force of the cell, respectively, in which case the upper clamp device and / or the lower clamp device respectively face each other. When operated by a pair of cylinders, it is configured to include a pair of clamp jaws each connected to each cylinder separately and configured to be adjustable in position so that the clamping force of the upper and lower cells of the indentation part can be adjusted in various directions. This allows more precise concentricity and straightness improvement, and adjusts over time. It is possible. In addition, the step reciprocating means is configured to lower and return the support jig up and down on a line almost the same as the center line of the pressing force by the tool horn, so that the welding force, that is, the pressing force of the tool horn is eccentric or inclined over the welding area. As it does not work evenly and no buckling occurs, poor welding does not occur and concentricity and straightness are further improved.

In addition, by releasing and fixing the upper and lower cells of the welding part at the time of welding, the relative position and horizontality of the cells to be welded are precisely maintained, so that concentricity and straightness between the cells can be greatly improved, and welding failure can be prevented. As it is welded, buckling does not occur and concentricity and straightness can be maintained precisely at all times.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 5 shows an ultrasonic welding device of a multi-stage series welding structure according to the present invention in a longitudinal cross-sectional view, FIG. 6 shows a structure of the ultrasonic welding part of FIG. 5 in a detailed partial enlarged view, and FIG. A schematic diagram of the welded portion W for explaining the ultrasonic welding method of the multi-stage series welded structure is shown.

First, the welding method according to the present invention in FIG. 7 basically fixes the upper and lower cells of the welding portion W with the lower clamp device 150 and the upper clamp device 140 and presses the ultrasonic tool horn 252 downward. And ultrasonic waves are deposited.

Therefore, even though the cells are welded, since the cells to be welded located above and below the weld portion W are fixed, there is no room for welding and concentricity and straightness are improved.

In this embodiment of the device of the present invention, although clamped by a cylinder, various clamping means can be applied without the present invention being not limited thereto, and the ultrasonic welding device of the present invention in FIGS. As shown in the related art, the upper and lower guide rails 110a and 110b are integrally formed with a guide rail 110, a fixed block 120, a fixed plate 130, a jig support member 160, and a tool. Horn 252, tool mixing member 250, control device 310, and the like, but is not limited to this configuration, other structures or parts having the same function may be used, and when the function is unnecessary, some It may be removed. In addition, in FIGS. 5 and 6, the one-stage cell Bl is a support plate of the air conditioner fan, but the present invention may be applied without being limited thereto.

5 and 6, the ultrasonic welding device of the present invention basically includes a supporting jig 170, stepwise reciprocating means 160, 165, 1800, 190 lower clamp device 150 and upper clamp device 140. It is configured by. In addition, the guide rail 110, the fixed block 120, the fixed plate 130, the jig support member 160, the tool horn 252, the tool horn support member 250 and the control device 310 is almost conventional As described in the surprise.

The supporting jig 170 is for loading and supporting the first stage cell B1 at the lowermost end of the welding structure at a predetermined position, but may be installed on the fixing plate 130 to be rotatable as shown in FIG. 5 and 6 show a structure fixed to the center of the upper plate 162 of the jig support member 160.

The step reciprocating means (160, 165, 180, 190) is configured to lower the support jig 170 step by step and back to the original position, as in Figs. 5 and 6 (as shown in Figs. 1 and 2) Alternatively, the female screw member 165 is rotatably installed at the lower part through the bushing or the bearing 165 ', and forms a gear engaged with the gear 190' at the outside of the female screw member 165 to form a motor. The rotational force of the 190 is transmitted, and the jig transfer shaft 180 is engaged with the female screw member 165 so that the jig supporting member 160 can be lifted with the jig supporting member 160 when the female screw member 165 rotates. The lower plate 164 may be rotatably fixed via the bearings 181 and 182 and the fixing members 1800 ′, 180 ″, and 183.

Since the jig feed shaft 180 does not intersect with the jig support member 160, the jig feed shaft 180 can be installed to match the center line of the supporting jig 170 as shown in FIG. Accordingly, the pressing force of the tool horn 252 can be uniformly applied to the weld portion W without eccentricity. Another power transmission device may be used between the motor L9O and the female screw member 165 controlled by the control device 310.

The lower clamp device 150 moves between a clamping position and a release position, and sequentially moves from the first stage cell B1 to the first unit cell Bn as the supporting jig 170 descends at the clamping position. It is comprised so that one welding cell B1, B2 ... B (n-1) just under the welding part W may be fixed to a predetermined position. 5 and 6 are opposed to and installed in the cylinder (151,151) and the clamp jaw (152,152) and through the control device 310 in accordance with the operation of the cylinder (151,151) of the cell below the weld portion (W) Reciprocate between the clamping position and the release position.

The upper clamp device 140 also moves between the clamping position and the release position, and is to be welded to a predetermined position on the welding cell Bl, B2 ... or B (n-1). As the supporting jig 170 descends when Bn) is loaded, the one-to-be-adhered cell B2 ... or Bn is sequentially fixed to a predetermined position. In FIG. 5 and FIG. 6, the upper clamp device 140 is composed of cylinders 141 and 14l facing and installed and clamp jaws 142 and 142 to operate the cylinders 14l and 141 via the control device 310. According to the reciprocating motion between the clamping position and the release position of the cell on the welded portion (N).

The upper clamp device 140 and / or lower clamp device 150 may be configured to precisely adjust the clamp position and / or clamp force of the cell, respectively. That is, as shown in FIGS. 5 and 6, when the upper clamp device 140 includes a pair of opposed cylinders 141 and 141, the intermediate connecting block 143 is connected to the connecting rods of the respective cylinders 141 and 141. ), The pair of clamp jaws 142, 142; 152, 152 through the fixing means (143 ') and the long hole (142') to be separated and the clamp jaws (142, 142) by releasing and fixing the fixing means (143 '). The clamp position and / or clamp force of the cell can be precisely adjusted. This point is equally applicable to the lower clamp device 150.

Referring to the drawings and the operation and effects of the ultrasonic welding device of a multi-stage series welding structure according to an embodiment of the present invention configured as described above with reference to the drawings, as follows.

According to the ultrasonic welding method of the present invention, in manufacturing by welding the cells of each stage of the multi-stage series structure, such as an air conditioner fan composed of multiple stages, by ultrasonic waves, the one-stage cell (B1) in the predetermined position on the supporting jig 170. Place the two-stage cell (B2) on it, pressurized with the ultrasonic tool horn 253, firing and welding the ultrasonic wave, and lowering the supporting jig 170 by the height of the two-stage cell (B2), the same manner Thus, by sequentially welding the three-stage cell (B3) to the N-single cell (Bn), the security of manufacturing a multi-stage series welding structure is the same as in the prior art.

According to the present invention, the lower clamping step and the upper clamping step are added, and the initial loading step, the lower clamping step, and the upper step for welding of the first single cell B1 and the second single cell B2 in FIGS. 5 and 6. The clamping step and the welding step are carried out, and the lower clamping step, the upper clamping step and the welding step are repeatedly performed after the loading preparation step for welding the three-stage cell B3 to the next two-stage cell B2. After the same steps are repeated from four-stage cell (B4) to N-single cell (Bn) and the structure is completed, a single-stage cell (Bl) is performed to unload the completed structure by performing a return and unloading step. Return to the position to load.

That is, in the initial loading step, the lowest stage 1 cell B1 is disposed at a predetermined position on the supporting jig 170, and in the lower clamping step, the cylinders 151 and 151 of the lower clamp device 150 are advanced to clamp. The jaw 152, 152 fixes the first cell Bl at the predetermined position, and then a loading step of placing the second cell B2 at a predetermined position on the first cell B1 is carried out. By 140, the two-stage cell Bl is fixed at the predetermined position (upper clamping step).

As described above, the first stage cell Bl and the second stage cell B2 are fixed at predetermined positions, and then the tool horn 252 is lowered together with the tool mixing member 250 by the cylinder 255 in the welding step. Ultrasonic waves are generated while pressing the single cell B2, and the second single cell B2 is welded to the first single cell B1.

After the first single cell Bl is welded to the second single cell B2, the tool horn 252 is returned, the upper clamp device 140 and the lower clamp device 150 are released, and the welded first single cell Bl) and the two-stage cell (B2) is lowered by one stage with the upper support jig 170 (loading preparation step).

After the loading preparation step, the steps from step (2) to step (6) are repeated for three steps of cells (B3) to N cells (Bn) (repeat step), and then the first cell (B1). When the N single cell (Bn) is welded to complete production of the multi-stage series welded structure, the welded structure is raised together with the supporting jig 170 to be unloaded and returned to the initial loading step.

(Return and unloading phase). In the case of welding the N single cell (Bn), it is preferable to perform the direct return and unloading step without the loading preparation step after the welding step.

By doing so, the production of one structure is completed and preparation for loading of the first cell B1 of the next structure is completed, and the above process is repeated to manufacture a large number of structures.

When the upper clamp device 140 and / or the lower clamp device 150 is configured to precisely adjust the clamp position and / or clamp force of the cell, respectively, the structure, tool horn 252, ultrasonic energy distribution, etc. By adjusting the pair of clamp clamps 142, 142; 152, 152 of the upper clamp device 140 and / or the lower clamp device 150 to be separated from each other according to the state it is possible to eliminate the poor welding and the precise welding of the structure.

In addition, the jig feed shaft 180 of the step-by-step reciprocating means (160, 165, 180, 190) can be configured to lower and return the support jig 170 up and down on the line almost the same as the center line of the pressing force by the tool horn 252. The eccentricity can be eliminated and thus the poor deposition can be eliminated, and the proper structure can be produced.

In addition, unlike when using the conventional through cup fixing jig 240, after the completion of the repetition step, the unloading of the completed structure even in the state of releasing the upper clamp device 140 and lower clamp device 150 Since it is possible to return the support jig 17O to its original position after unloading in the return and unloading step, the reciprocating movement distance of the tool holding member 250 of the upper part can be shortened. It is possible to improve the precision of the lifting motion to perform the welding of the structural mall precisely.

According to the configuration and function of the ultrasonic welding device of the multi-stage series welding structure according to the embodiments of the present invention described above, the loading and welding can be made precisely by clamping the cells immediately above and below the welding portion, so that the length of the air conditioner fan is the same. The concentricity and turnover of the multi-stage series welding structure, which is a long product, is greatly improved, the weldable amount is accumulated, the surface vibration is improved, and the clamping jaws are also adopted to improve the product quality. Productivity can be improved, and also the jig feed shaft 18O can be coaxial with the supporting jig 17O to prevent eccentricity and thereby remove the eccentric force. It is possible to prevent one-sided wear and the like, and to further improve the quality of the product.

Although the present invention has been described in detail with reference to the accompanying drawings, the present invention is not limited thereto, and modifications, improvements, and applications are possible without departing from the ordinary knowledge of those skilled in the art.

Claims (1)

Support jig 170 for loading the lowermost stage 1 (B1) of the welded structure in a predetermined position, step-by-step reciprocating means (160, 165, 180, 190) for lowering and returning the support jig 170 step by step, clamping position And the release jig, and as the support jig 170 descends from the clamping position, one of the first portion (B1) to (N-1) single cell (Bn) immediately below the weld portion (W) Welding cells B1 and B2. Or Bn-1)) to (N-1) single cell Bn to fix one welding cell B1, B2... Or B (n-1) directly below the welding portion W to a predetermined position. One to-be-welded cell when the lower clamp device 150 and the to-be-welded cell B2 ... or Bn to be welded to a predetermined position are loaded on the welding cells B1, B2 ... or B (n-1). In the ultrasonic welding device of a multi-stage series welding structure comprising an upper clamp device 140 for fixing (B2 ... Bn) to a predetermined position in order as the supporting jig 170 descends: the upper clamp The device 140 and the lower clamp device 150 are each configured to precisely adjust the clamp position and the clamping force of the cell, and each of the cylinders (141,141; 151, 151) when operated by a pair of opposed cylinders (141,141; A pair of clamp jaws 142, 14 which are separately connected to 141, 141 and 151, 151, respectively, and whose positions are adjustable 2, 152,152; The stepped reciprocating means (160, 165, 180, 190) is an ultrasonic wave of the multi-stage series welding structure, characterized in that configured to lower and return the support jig 170 up and down on a line almost the same as the center line of the pressing force by the tool horn 252. Welding device.

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