Position-Adjustable Jig System for Laser Welding Compatible with Multiple Product Types

Abstract

A multi-product compatible position adjustment jig system (1) for laser welding is disclosed, which is used in conjunction with a laser welding device (10) that irradiates a laser beam onto the welding area of ​​a workpiece (W1, W2). The disclosed system (1) includes a work support (202) on which a first workpiece (W1) is mounted, a rotating chuck device (200) for rotating the first workpiece (W1); and a jig device (100) for adjusting and fixing the position of a second workpiece (W2). The jig device (100) includes a vertical support frame (110) fixedly installed on a work table (B); a lifting carriage (120) coupled to the vertical support frame (110) so as to be movable up and down; and a horizontal arm (130) coupled to the lifting carriage (120) and extending in a horizontal direction. The apparatus includes a tail pressure unit (140) coupled to the horizontal arm (130) and aligning and fixing the second workpiece (W2) by applying pressure, wherein the tail pressure unit (140) includes a tail pressure rod (144) and a tail pressure head (145) coupled to the lower end of the tail pressure rod (144), and the tail pressure head (145) is configured to be inserted into an opening of the second workpiece (W2) to center the position of the second workpiece (W2).

Description

Technology Field

[0001] The present invention relates to a jig system for laser welding, and more specifically, to a multi-product compatible position adjustment jig system for laser welding that can fix and support workpieces of various shapes and perform laser welding operations by adjusting the position of the workpieces. Background Technology

[0002] In general, TIG (Tungsten Inert Gas) welding or argon welding are widely used as welding processes for joining metal members (especially tubular metal members). These welding methods are often performed manually, where an operator directly manipulates the welding torch to weld the workpiece.

[0003] However, the aforementioned manual welding method presents several problems: welding quality may vary depending on the operator's skill level, and additional labor costs increase because a tack welding process is often required to align and temporarily secure the workpiece before welding. Furthermore, repetitive manual work leads to reduced productivity and increased working time.

[0004] Accordingly, automated processes utilizing laser welding have recently been attracting attention to ensure uniform welding quality and improve productivity. Laser welding is suitable for automated processes due to its advantages, such as a narrow heat-affected zone, excellent precision, and high welding speed.

[0005] However, if the laser welding device itself is configured as a multi-joint robot structure to accommodate workpieces of various shapes, there are problems such as increased equipment complexity and significantly higher initial construction and maintenance costs. On the other hand, even when using laser welding jigs, conventional jigs are mostly in the form of dedicated jigs manufactured individually to fit specific workpiece shapes; therefore, there is inefficiency in that a new jig must be manufactured or replaced whenever the shape of the workpiece changes.

[0006] Therefore, there is an increasing demand for improved jig systems that can handle workpieces of various shapes without the need for complex multi-joint robot systems, and can perform laser welding without a tack welding process by precisely positioning and fixing the workpiece. Prior art literature

[0007] Registration No. 10-0997886 (November 26, 2010) The problem to be solved

[0008] The present invention has been devised to solve the above-mentioned problems and aims to provide a laser welding jig system capable of stably supporting and fixing workpieces of various shapes with a single jig system, and adjusting their positions and rotating them. means of solving the problem

[0009] According to one aspect of the present invention, a multi-product responsive position adjustment jig system (1) for laser welding is provided, which is used in conjunction with a laser welding device (10) that irradiates a laser beam onto a welding area of ​​a workpiece (W1, W2). The multi-product responsive position adjustment jig system (1) for laser welding comprises: a work support member (202) on which a first workpiece (W1) is mounted; a rotating chuck device (200) for rotating the first workpiece (W1); and a jig device (100) for adjusting and fixing the position of a second workpiece (W2). The jig device (100) comprises: a vertical support frame (110) fixedly installed on a work table (B); a lifting carriage (120) coupled to the vertical support frame (110) so as to be movable up and down; and a horizontal arm (130) coupled to the lifting carriage (120) and extending in a horizontal direction. The apparatus includes a tail pressure unit (140) coupled to the horizontal arm (130) and aligning and fixing the second workpiece (W2) by applying pressure, wherein the tail pressure unit (140) includes a tail pressure rod (144) and a tail pressure head (145) coupled to the lower end of the tail pressure rod (144), and the tail pressure head (145) is configured to be inserted into an opening of the second workpiece (W2) to center the position of the second workpiece (W2).

[0010] The above-described pressure unit (140) further comprises a base block (141) coupled to the horizontal arm (130); and a rotation guide plate (142) for changing the position of the base block (141), wherein the rotation guide plate (142) includes an axis hole (142a) and an arc-shaped guide slot (142b) formed around the axis hole (142a), and a pin is formed in the base block (141) that is inserted into the arc-shaped guide slot (142b), so that the base block (141) rotates within a range of about 90 degrees and the direction of the pressure rod (144) can be selectively switched between a vertical direction and a horizontal direction.

[0011] The above-mentioned pressure unit (140) further includes a lifting drive module (143) comprising an operating lever (143a), a lever bracket (143b), a lever shaft (143c), and a link (143d), and the lifting drive module (143) is configured to convert the rotational motion of the operating lever (143a) into a linear lifting motion of the pressure rod (144), and the base block (141) is rotatably coupled to the horizontal arm (130) on a horizontal plane with respect to a swing rotation axis (141a), and a swing slot (141b) is formed in the base block (141) or the horizontal arm (130) with the swing rotation axis (141a) as the arc center, and a guide pin is formed in the horizontal arm (130) or the base block (141) to be inserted into the swing slot (141b), so that the base block (141) rotates horizontally in a predetermined angle range, thereby raising The central axis of the tail rod (144) is configured to be laterally spaced from the central axis of the second workpiece (W2) to secure a space for the withdrawal of the welded workpiece. Effects of the invention

[0012] According to the multi-product compatible position adjustment jig system for laser welding of the present invention, a single jig system can handle workpieces of various shapes, sizes, and specifications, thereby reducing the burden of having to manufacture or replace separate dedicated jigs for each product. Consequently, equipment utilization is improved, and jig preparation time and costs can be reduced.

[0013] In addition, since the height and position of the tailstock can be precisely adjusted through the vertical support frame, lifting carriage, and horizontal arm, it is possible to flexibly respond to changes in the shape or welding position of the workpiece and reduce the work setup time.

[0014] In addition, as the tailstock head is inserted into the opening of the tubular workpiece and performs an automatic centering function, the alignment precision of the center axes of the first and second workpieces can be improved. Accordingly, precise positional alignment can be secured without a separate tack welding process, thereby reducing labor costs and improving productivity.

[0015] In addition, the tapered structure and replaceable configuration of the tailstock head allow for the adaptation to tubular workpieces of various inner diameters, and by applying a micro-flow structure to the tailstock head as needed, automatic correction is possible even when eccentricity or assembly errors exist, thereby maintaining a stable fixed state.

[0016] In addition, the tailstock unit provides a limited horizontal swing function of the base block along with a lifting function for the tailstock, allowing the central axis of the tailstock to be laterally separated from the central axis of the workpiece after welding is complete, thereby securing space for the extraction of the finished product. As a result, the welded product can be removed more quickly and easily, improving work convenience.

[0017] In addition, since the direction of the tailstock can be selectively switched between vertical and horizontal directions using a rotating guide plate, it is possible to effectively handle workpieces with structures that are difficult to access from the top or cases where lateral pressure is required. Therefore, the range of compatibility for the diverse shapes of welding targets can be further expanded.

[0018] Furthermore, since laser welding can be performed while stably rotating the workpiece using a rotary chuck device, uniform weld quality can be ensured across the entire circumferential direction. In particular, compared to conventional TIG welding or manual argon welding, it is possible to simultaneously improve welding precision, productivity, and quality stability while reducing dependence on operator skill. Brief explanation of the drawing

[0019] FIG. 1 is a perspective view showing the overall configuration of a multi-product compatible position adjustment jig system for laser welding according to one embodiment of the present invention. FIG. 2 is a perspective view showing the configuration of a jig device and a rotary chuck device in a multi-product compatible position adjustment jig system for laser welding according to one embodiment of the present invention. FIGS. 3a to 3c are enlarged perspective views for explaining the configuration and operation of a heart pressure unit according to an embodiment of the present invention. FIG. 4a is a side view showing a state in which a cardiac pressure unit according to one embodiment of the present invention maintains a vertical posture. FIG. 4b is a side view showing a state in which a cardiac pressure unit according to one embodiment of the present invention is rotated and switched to a horizontal position. FIG. 5 is a control block diagram of a vision sensor-based automatic alignment correction system according to another embodiment of the present invention. Specific details for implementing the invention

[0020] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein.

[0021] In describing the present invention, the size or shape of the components shown in the drawings may be exaggerated or simplified for clarity and convenience of explanation.

[0022] Furthermore, terms specifically defined in consideration of the structure and operation of the present invention may vary depending on the intent or practice of the user or operator. These terms should be interpreted in a meaning and concept consistent with the technical spirit of the present invention based on the content throughout this specification.

[0023] To clearly explain the present invention, descriptions of parts unrelated to the technical concept of the present invention have been omitted, and the same reference numerals are used for identical or similar components throughout the specification.

[0024] In addition, for components having the same configuration in various embodiments, the same reference numerals are used to describe them only in the representative embodiment, and in other embodiments, only configurations different from the representative embodiment are described.

[0025] As illustrated in FIGS. 1 to 4b, a multi-product compatible position adjustment jig system (1) for laser welding according to one embodiment of the present invention can be used together with a laser welding device (10).

[0026] The laser welding device (10) may be configured to perform fusion joining by irradiating a laser beam onto the welding area of ​​the workpiece (W1, W2). The laser welding device (10) may include a laser oscillator, a laser irradiation head, and a control unit, but since the specific configuration is a known technology, a detailed description is omitted.

[0027] In this embodiment, the laser welding device (10) may include a horizontal arm (11), a vertical column (12) installed to be movable horizontally along the horizontal arm (11), and a laser irradiation head (13) installed to be movable vertically along the vertical column (12).

[0028] The vertical column (12) can automatically move horizontally along the horizontal arm (11) under the control of the control unit, and the laser irradiation head (13) can automatically move vertically along the vertical column (12). Accordingly, the laser irradiation head (13) can be precisely positioned in the horizontal and vertical directions corresponding to the welding position of the workpiece (W1, W2).

[0029] The feature of the present invention is a multi-product compatible position adjustment jig system (1) for laser welding that stably supports and fixes workpieces (W1, W2) welded by the laser welding device (10), and enables position adjustment and rotation.

[0030] In this embodiment, the first workpiece (W1) may be a disc-shaped metal member and may be detachably mounted on a workpiece support (202) of a rotating chuck device (200) positioned at the bottom.

[0031] The second workpiece (W2) may be a tubular metal member and may be inserted into the through hole of the first workpiece (W1).

[0032] That is, in this embodiment, laser welding can be performed along the joint boundary between the first workpiece (W1) and the second workpiece (W2).

[0033] However, the shape, size, and number of the above-mentioned workpieces (W1, W2) are merely examples, and the present invention is not limited thereto.

[0034] The above-described multi-variety compatible position adjustment jig system (1) for laser welding may include a jig device (100) and a rotary chuck device (200).

[0035] The above jig device (100) is configured to adjust and fix the upper position of the workpiece (W1, W2) and may include a vertical support frame (110), a lifting carriage (120), a horizontal arm (130), and a tail pressure unit (140).

[0036] The above vertical support frame (110) can be fixedly installed on a work table (B) as a main frame that supports the entire structure of the jig device (100).

[0037] The lifting carriage (120) can be coupled to the vertical support frame (110) so as to be movable up and down. For example, the lifting carriage (120) can be raised by a transfer screw such as a lead screw or a ball screw, or by a rack and pinion structure.

[0038] In this embodiment, a pair of vertical guide rails (111) may be installed vertically on the vertical support frame (110) at a distance from each other, and a transfer screw (112) may be disposed between the pair of vertical guide rails (111).

[0039] The lifting carriage (120) is coupled to be vertically movable along the pair of vertical guide rails (111) and can also be coupled to the transfer screw (112) in a screw-transfer manner.

[0040] The above transfer screw (112) can be rotatably supported on an upper support bracket (113) provided at the top of the vertical support frame (110) and a lower support bracket (114) provided at the bottom.

[0041] Additionally, the transfer screw (112) may extend upward through the upper support bracket (113), and an operating handle (115) may be provided at the top thereof.

[0042] Accordingly, when the operator rotates the operating handle (115), the transfer screw (112) rotates, and in conjunction with this, the lifting carriage (120) moves up and down along the vertical guide rail (111) and can be precisely adjusted to a desired height.

[0043] The horizontal arm (130) can be formed to be connected to the lifting carriage (120) and extended in a horizontal direction. The horizontal arm (130) can be adjusted in an up-and-down position in conjunction with the lifting of the lifting carriage (120), and accordingly, the height of the tail pressure unit (140) supported by the horizontal arm (130) can also be adjusted.

[0044] The above horizontal arm (130) is configured to provide a horizontal support position corresponding to the shape, size, or welding position of the workpiece (W1, W2).

[0045] The above-mentioned tail pressure unit (140) can be slidably coupled to the horizontal arm (130) and can be fixed in the working position after position adjustment. For example, it can be optionally fixed by a fixing bolt, clamp, tightening knob, or fastening pin.

[0046] The above-mentioned pressure unit (140) is configured to press, align, and fix the second workpiece (W2) and may include a base block (141), a rotation guide plate (142), a lifting drive module (143), a pressure rod (144), and a pressure head (145).

[0047] The base block (141) is coupled to the upper surface of the horizontal arm (130) and can support the main components of the tail pressure unit (140).

[0048] The above-mentioned pivot guide plate (142) may be configured to selectively switch the pressure direction of the pressure rod (144) by changing the position of the pressure unit (140).

[0049] The above-mentioned pivot guide plate (142) may include an axial hole (142a) into which a positioning pin is inserted. The axial hole (142a) may be configured to provide a positioning reference when the position of the tail pressure unit (140) is changed. When changing the position, the positioning pin is inserted into the axial hole (142a) to guide the rotation of the base block (141), and after the change in position is completed, the positioning pin is separated or retracted to prevent interference during operation.

[0050] Additionally, an arc-shaped guide slot (142b) centered on the shaft hole (142a) may be formed in the above-mentioned pivot guide plate (142).

[0051] A pin that is inserted into the guide slot (142b) may be formed on the side of the base block (141), and the pin may guide and limit the rotation angle of the base block (141) while moving along the guide slot (142b).

[0052] Accordingly, the base block (141) can rotate within a range of about 90 degrees, and the direction of the pressure rod (144) can be changed between the vertical direction and the horizontal direction.

[0053] The above lifting drive module (143) may be configured to be installed on the base block (141) to lift the pressure rod (144).

[0054] In this embodiment, the lifting drive module (143) may include an operating lever (143a), a lever bracket (143b), a lever shaft (143c), and a link (143d).

[0055] The above link (143d) converts the rotational motion of the operating lever (143a) into the linear upward motion of the pressure rod (144).

[0056] The above pressure rod (144) is a rod-shaped member that is movably connected to the base block (141) and can be configured to transmit pressure from the upper side to the lower side of the second workpiece (W2).

[0057] Alternatively, the lifting drive module (143) may further include a pressure adjustment unit so that the pressure applied through the pressure rod (144) does not exceed a set range.

[0058] For example, the pressure adjustment unit may include a compression spring, a gas spring, a torque limiting lever, a friction clutch, or a similar overload limiting mechanism.

[0059] Since the appropriate pressure for each workpiece can be set by the pressure adjustment unit described above, stable welding operations are possible using the same jig system for various workpieces with different thicknesses or stiffnesses.

[0060] Accordingly, even if the operator over-operates the operating lever (143a), the pressure transmitted to the second workpiece (W2) through the pressure rod (144) can be limited to a set maximum value.

[0061] In particular, since local deformation, distortion, or center axis alignment error of the second workpiece (W2) may occur due to excessive pressure during the laser welding process, the pressure control unit can contribute to ensuring stable welding quality while preventing such problems.

[0062] A pressure head (145) can be attached to the lower end of the pressure rod (144).

[0063] The above-mentioned tail head (145) may include a tapered shape in which the diameter decreases as it goes downward. Accordingly, when the tail head (145) is inserted into the upper opening of the second workpiece (W2), automatic centering can be achieved by the tapered shape.

[0064] Additionally, the above-mentioned tail head (145) can be detachably coupled and replaced to correspond to tubular workpieces of various inner diameters.

[0065] Although not described in detail, the tail pressure head (145) can be combined with a spherical support formed at the bottom of the tail pressure rod (144) and an elastic member that elastically supports the spherical support. Accordingly, the tail pressure head (145) can tilt or move slightly laterally within a predetermined range with respect to the central axis of the tail pressure rod (144), and even if there is eccentricity or assembly error in the workpiece, the posture is automatically corrected to enable stable centering.

[0066] Meanwhile, the base block (141) can be coupled to the upper surface of the horizontal arm (130) so as to be horizontally swingable within a predetermined angle range.

[0067] Specifically, a swing rotation axis (141a) may be formed on the lower part of the base block (141) or on the upper surface of the horizontal arm (130), and the base block (141) may be supported so as to be rotatable on a horizontal plane around the swing rotation axis (141a).

[0068] Additionally, an arc-shaped swing slot (141b) may be formed in the base block (141), and a guide pin inserted into the swing slot (141b) may be formed in the horizontal arm (130).

[0069] The swing slot (141b) can be formed with the swing rotation axis (141a) as the center of the arc.

[0070] In particular, the swing slot (141b) can be formed to allow a rotation range of approximately 7.5 degrees to the left and right, and a total of approximately 15 degrees relative to the neutral position.

[0071] Accordingly, the base block (141) can swing and rotate only within a limited range in the left and right directions.

[0072] This swing rotation is a movement distinct from the 90-degree position change using the above-mentioned pivot guide plate (142). That is, the swing rotation of approximately 15 degrees is intended to move the center axis of the tail rod (144) away from the center axis of the second workpiece (W2) after welding is completed to secure a space for workpiece extraction, and the 90-degree position change is intended to change the tail direction itself.

[0073] The above rotary chuck device (200) may include a chuck (201), a work support (202), and a rotary drive unit (203).

[0074] The above-mentioned rotary drive unit (203) may include a motor and can rotate the work support unit (202) by rotating the chuck (201).

[0075] The above work support member (202) may include a seating surface or a fastening structure corresponding to the shape of the first workpiece (W1), and may be installed so as to be detachably replaceable to correspond to workpieces of various shapes.

[0076] The operation of the present invention is described below.

[0077] First, the operator selects and mounts a work support (202) and a tail head (145) corresponding to the welding target.

[0078] Next, the first workpiece (W1) is fixed to the work support (202), and the second workpiece (W2) is inserted.

[0079] Afterwards, the height of the lifting carriage (120) and the horizontal position of the tail pressure unit (140) are adjusted.

[0080] Next, by operating the control lever (143a) to lower the tail rod (144), the tail head (145) is inserted into the opening of the second workpiece (W2), and automatic centering is performed.

[0081] Accordingly, since the relative positions of the first workpiece (W1) and the second workpiece (W2) are stably maintained without a separate tack welding process, laser welding can be performed immediately with the initial alignment error minimized.

[0082] In this state, the laser welding device (10) performs welding, and at the same time, the rotating chuck device (200) rotates so that continuous laser welding can be performed on the entire circumference of the joint boundary.

[0083] After welding is complete, the operator raises the tail rod (144) to separate it from the second workpiece (W2).

[0084] Afterwards, when the base block (141) is rotated swing-rotated at a predetermined angle, the central axis of the tail rod (144) moves laterally away from the central axis of the second workpiece (W2).

[0085] As a result, the upper space of the welded finished product is open, allowing the worker to easily retrieve the finished product without interference.

[0086] Additionally, as needed, the operator can change the position of the pressure unit (140) using the rotation guide plate (142).

[0087] In the initial state, as shown in FIG. 4a, the pressure rod (144) can be positioned in a vertical direction. In this state, the pressure head (145) transmits pressure from the upper side to the lower side.

[0088] Afterward, when the base block (141) is rotated, the position of the tail rod (144) can be changed in the horizontal direction as shown in FIG. 4b. In this state, the tail head (145) can press or support the workpiece from the side direction.

[0089] Therefore, it can effectively handle workpieces with structures that are difficult to access from the top or cases where lateral alignment is required.

[0090] In addition, when the shape of the workpiece is changed, the workpiece support (202) and the tailstock head (145) are replaced with parts suitable for the shape, and the position of the tailstock unit (140) is changed as needed, thereby allowing for various workpieces to be handled without the need for a separate dedicated jig.

[0091] As a result, the present invention can respond to various welding conditions without the need for a separate dedicated jig replacement, thereby reducing jig preparation time and labor while improving welding alignment precision and operational flexibility.

[0092] FIG. 5 is a control block diagram of a vision sensor-based automatic alignment correction system according to another embodiment of the present invention.

[0093] As illustrated in FIG. 5, a multi-product compatible position adjustment jig system (1) for laser welding according to another embodiment of the present invention may further include a vision sensor unit (400) and a control unit (500).

[0094] The above vision sensor unit (400) may include a camera as a configuration for detecting the position, center axis alignment state, and joint gap of the workpiece (W1, W2).

[0095] Alternatively, the vision sensor unit (400) may further include at least one of a distance sensor and a lighting unit to improve detection precision. For example, the distance sensor may measure the height or relative position of the workpiece, and the lighting unit may improve the recognition of the contour or boundary of the object being photographed.

[0096] The above vision sensor unit (400) can acquire images of the first workpiece (W1) and the second workpiece (W2) and transmit them to the control unit (500).

[0097] The control unit (500) can calculate the center position of the first workpiece (W1), the center position of the second workpiece (W2), the gap between the two workpieces, and the tilt error based on image or sensor data input from the vision sensor unit (400).

[0098] Specifically, the control unit (500) can detect the center position using an image processing or pattern recognition algorithm and calculate the deviation amount and alignment error between the center axes.

[0099] Afterwards, the control unit (500) can generate a correction control signal based on the calculated alignment error.

[0100] The above correction control signal can be transmitted to the jig device (100) and the rotary chuck device (200).

[0101] The above jig device (100) can correct the position of the second workpiece (W2) by finely adjusting the position of the lifting carriage (120), horizontal arm (130), or tail pressure unit (140) according to the correction control signal.

[0102] In addition, the rotary chuck device (200) can correct the orientation of the first workpiece (W1) by adjusting the chuck rotation angle, rotation position, or rotation speed according to the correction control signal.

[0103] Accordingly, the center axis error, gap error, and inclination error of the first workpiece (W1) and the second workpiece (W2) can be automatically corrected.

[0104] As a result, pre-welding alignment precision can be improved while minimizing manual alignment intervention by the operator, and stable laser welding quality can be secured even in multi-product production environments.

[0105] The present invention is not limited by the aforementioned embodiments and can be implemented with various modifications. Explanation of the symbols

[0106] 1: Multi-product compatible position adjustment jig system for laser welding 10: Laser welding device 11: Horizontal arm 12: Vertical column 13: Laser Irradiation Head 100 : Jig device 110: Vertical support frame 111: Vertical guide rail 112: Transfer screw 113: Upper support bracket 114: Lower support bracket 115 : Operation handle 120 : Elevator carriage 130 : Horizontal arm 140: Cardiac pressure unit 141 : Base Block 141a : Swing rotation axis 141b : Swing slot 142 : Rotation guide plate 142a : Axle hole 142b : Guide slot 143: Lifting drive module 143a : Operating lever 143b : Lever bracket 143c : Lever axis 143d : Link 144 : Cardiac pressure rod 145: Tail pressure head 200: Rotary chuck device 201 : Chuck 202 : Work support 203: Rotary drive unit B: Work table W1: First workpiece W2: Second workpiece

Claims

Claim 1 A multi-product responsive position adjustment jig system (1) for laser welding used together with a laser welding device (10) that irradiates a laser beam onto a welding area of ​​a workpiece (W1, W2), comprising: a work support member (202) on which a first workpiece (W1) is mounted, and a rotating chuck device (200) for rotating the first workpiece (W1); and a jig device (100) for adjusting and fixing the position of a second workpiece (W2), wherein the jig device (100) comprises: a vertical support frame (110) fixedly installed on a work table (B); a lifting carriage (120) coupled to the vertical support frame (110) so as to be movable up and down; and a horizontal arm (130) coupled to the lifting carriage (120) and extending in a horizontal direction. The apparatus includes a tail pressure unit (140) coupled to the horizontal arm (130) and aligning and fixing the second workpiece (W2) by applying pressure, wherein the tail pressure unit (140) includes a tail pressure rod (144) and a tail pressure head (145) coupled to the lower end of the tail pressure rod (144), wherein the tail pressure head (145) is configured to be inserted into an opening of the second workpiece (W2) to center the position of the second workpiece (W2), and the tail pressure unit (140) comprises a base block (141) coupled to the horizontal arm (130);The apparatus further includes a rotation guide plate (142) for changing the position of the base block (141), wherein the rotation guide plate (142) includes an axis hole (142a) and an arc-shaped guide slot (142b) formed around the axis hole (142a), and the base block (141) has a pin formed therein that is inserted into the arc-shaped guide slot (142b), so that the base block (141) rotates within a range of about 90 degrees and the direction of the pressure rod (144) can be selectively switched between a vertical direction and a horizontal direction, and the pressure unit (140) further includes a lifting drive module (143) comprising an operating lever (143a), a lever bracket (143b), a lever shaft (143c), and a link (143d), and the lifting drive module (143) converts the rotational movement of the operating lever (143a) into a linear lifting movement of the pressure rod (144). A multi-variety compatible position adjustment jig system for laser welding, characterized in that it is configured to convert, wherein the base block (141) is rotatably coupled to the horizontal arm (130) on a horizontal plane with respect to the swing rotation axis (141a), a swing slot (141b) is formed in the base block (141) or the horizontal arm (130) with the swing rotation axis (141a) as the arc center, and a guide pin is formed in the horizontal arm (130) or the base block (141) to be inserted into the swing slot (141b), so that the base block (141) rotates horizontally in a predetermined angle range, thereby causing the center axis of the raised tail rod (144) to be laterally separated from the center axis of the second workpiece (W2) to secure a space for extracting the welded workpiece. Claim 2 delete Claim 3 delete

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