CN107635718B

CN107635718B - Welding gun angle adjusting mechanism and cutting device with same

Info

Publication number: CN107635718B
Application number: CN201680016215.XA
Authority: CN
Inventors: 崔真培
Original assignee: Accu One Co ltd
Current assignee: Accu One Co ltd
Priority date: 2016-08-19
Filing date: 2016-09-08
Publication date: 2020-03-31
Anticipated expiration: 2036-09-08
Also published as: CN107635718A

Abstract

The invention relates to a welding gun angle adjusting mechanism and a cutting device with the same. The welding gun angle adjusting mechanism comprises a lifting part which is driven by a driving part to do lifting motion in a state of being supported on the frame; the rotating force generating part is connected with the lifting part and is driven by the lifting part to generate rotating force; a link unit which is connected to the rotational force generating part in a link manner and converts the rotational force from the rotational force generating part into a linear motion; the overturning connecting rod is connected to the connecting rod unit and is driven by the movement force from the connecting rod unit to overturn; and the welding gun support supports a welding gun in a state of being arranged on the turnover connecting rod. According to the angle adjusting mechanism and the cutting device with the angle adjusting mechanism, the angle of the welding gun can be independently adjusted through the specially arranged welding gun overturning connecting rod, so that the flexibility is good, the operation speed is high, and the production efficiency is high.

Description

Welding gun angle adjusting mechanism and cutting device with same

Technical Field

The present invention relates to a torch angle adjusting mechanism for adjusting various torch angles used for cutting a workpiece, and a cutting apparatus having the same.

Background

A welding torch installed in a cutting apparatus using laser, gas, or plasma is generally used to cut an iron plate into a desired shape by two-dimensional movement in front, rear, left, and right directions. The cut surface of the iron plate cut by the welding torch is vertical. I.e. at right angles to the upper surface of the iron plate.

However, in actual industrial fields, the cut surfaces of the iron plates are often required to be inclined, and for example, when two iron plates are butt-welded to form an inclined surface, or when one iron plate is welded to the other iron plate by being inclined, the edges of the iron plates are required to be inclined.

In the past, in order to form a slope on an iron plate, a vertical cross section was formed by a cutting torch, and then machined into a slope by another cutting device. Of course, such a series of processes is complicated, inconvenient, and inefficient, resulting in increased costs.

In order to solve such a problem, there have been developed apparatuses which can perform groove cutting by turning a welding torch itself at a desired angle by using various types of link mechanisms, robot joints, and the like.

For example, national patent publication No. 10-2009-0018260 (a torch rotating apparatus intended for angular cutting and a CNC cutting machine using the same) discloses a torch rotating apparatus including a vertical first rotating shaft, a second rotating shaft connected to the first rotating shaft at an inclination, and a cutting torch connected to the second rotating shaft. The cutting torch is positioned on the second rotation axis and on the same axis, and thus operates at the same inclination angle as the second rotation axis.

However, the conventional torch rotating device has a disadvantage that the cutting torch has a fixed angle with respect to the first rotating shaft, and thus, it is difficult to precisely adjust the angle of the cutting torch. That is, in the case where the vertical first rotation axis is not fixed, it is impossible to adjust only the angle of the cutting torch.

In order to adjust the angle of the cutting torch, it is necessary to move the gantry of the entire machine, and at this time, the position of the lower end of the cutting torch is changed, so that it is necessary to compensate for the distance corresponding to the amount of displacement of the cutting torch by the following operation. This is a main cause of slowing down the entire operation speed. This is because the change in position including the adjustment of the position of the gantry is slower than the displacement speed of the cutting torch.

Disclosure of Invention

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a welding torch angle adjusting mechanism and a cutting apparatus having the same, which are capable of adjusting an angle of a welding torch independently by a welding torch overturning link, thereby achieving high flexibility, high operation speed, and high production efficiency.

In order to achieve the above object, the welding gun angle adjusting mechanism of the present invention includes an elevating portion that is driven by a driving portion to perform an elevating movement in a state of being supported by a frame; the rotating force generating part is connected with the lifting part and is driven by the lifting part to generate rotating force; and a link unit which is connected to the rotational force generating part in a link manner and converts the rotational force from the rotational force generating part into a linear motion; the overturning connecting rod is connected to the connecting rod unit and is driven by the movement force from the connecting rod unit to overturn; and the welding gun support supports a welding gun in a state of being arranged on the turnover connecting rod.

In addition, the lifting part is characterized by comprising a lifter body, wherein the lifter body is subjected to power from the driving part and performs lifting movement within a certain range; and a lifting rod extending downward in a state of being fixed to the elevator body and connected to the rotational force generating part; the revolving force generating part comprises more than one connecting rod driving shaft, and the connecting rod driving shaft is driven by the lifting rod to do shaft rotating motion.

In addition, the rotational force generating portion is characterized by including a support housing provided at a lower portion of the frame; the upper belt pulley and the lower belt pulley are arranged in the shell in an up-and-down isolated manner; the belt is connected with the upper belt pulley and the lower belt pulley and is combined with the lifting rod to enable the upper belt pulley and the lower belt pulley to rotate in the lifting movement process of the lifting rod; the connecting rod driving shaft supports the upper belt pulley and the lower belt pulley to form a belt pulley shaft which transmits the rotating force of the upper belt pulley and the lower belt pulley to the connecting rod mechanism.

Further, the link unit is characterized by comprising a pair of I links extending vertically in a spaced state in parallel with each other; and the connecting rod is subjected to the rotating torque transmitted from the belt pulley shaft, performs reversing motion and is connected with the connecting rods of the I connecting rods at two sides in a reversing mode through the connecting pins.

In addition, the connecting link is characterized by comprising a reversing part, wherein the reversing part performs reversing motion by taking the belt pulley shaft as a center; and the connecting part is integrated with the end part of the reversing part, extends in the direction orthogonal to the length direction of the reversing part, and is connected with the I connecting rods at two sides through connecting pins at two ends.

In addition, the turnover connecting rod is characterized in that the turnover connecting rod is connected with the lower ends of the I-shaped connecting rods at the two ends of the turnover connecting rod in a reversible mode through a connecting pin, and the welding gun support is located in the middle between the connecting pin and the connecting pin.

In addition, the cutting device for achieving the purpose is characterized by comprising a lifting part, wherein the lifting part is driven by a driving part to do lifting motion under the state that the lifting part is supported on a frame; the rotation generating part is rotatably arranged at the lower part of the frame, and the lifting part generates rotating force along with the lifting movement; and a link unit which is link-connected to the rotational force generating part and converts the rotational force from the link unit into a linear motion; the overturning connecting rod is connected to the connecting rod unit and is driven by the movement force from the connecting rod unit to overturn; the welding gun angle adjusting mechanism consists of the components which are arranged on the turnover connecting rod and used for supporting a welding gun; and a rotating head end arranged at the lower end of the frame and used for enabling the rotating force generating part to generate a shaft rotating shaft; and a lead lifting part which is positioned on the frame, is connected with the rear end of the welding gun, supports the soft welding gun lead extending along the length direction, and is linked with the angle movement of the welding gun to lift the welding gun lead.

Further, the wire raising and lowering section is characterized by including a vertical rod that extends vertically upward in a state of being fixed to the frame; and a lead holder supported to be movable up and down with respect to the vertical rod in a state of being coupled to a part of the welding gun lead; and a support position adjusting portion that can adjust the height of the support.

The lifting part is characterized by comprising a lifter body, wherein the lifter body is subjected to power from the driving part and performs lifting movement within a certain range; and a lifting rod extending downward in a state of being fixed to the elevator body and connected to the rotation generating part; the rotation generating part comprises more than one connecting rod driving shaft, and the connecting rod driving shaft and the lifting rod are driven by the lifting motion.

In addition, the rotation generating part may include a support housing provided at a lower portion of the frame; and upper and lower pulleys provided in the support housing in spaced relation to each other; the belt is combined with the lifting rod, and when the lifting rod performs lifting motion, the upper belt wheel and the lower belt wheel rotate; the connecting rod driving shaft supports the upper belt pulley and the lower belt pulley to form a belt pulley shaft for transmitting the rotating force of the upper belt pulley and the lower belt pulley to the connecting rod unit.

Further, the link unit is characterized by comprising a pair of I links extending vertically in a spaced state in parallel with each other; and the connecting rod receives the rotation torque from the belt pulley shaft to rotate and is connected with the I connecting rods at two sides in a reversible manner through the connecting pin.

The connecting rod is characterized by comprising a reversing part, wherein the reversing part performs reversing motion by taking a belt pulley shaft as a reversing shaft; and the connecting part is integrated with the end part of the reversing part, extends in the direction orthogonal to the length direction of the reversing part, and is connected with the I connecting rods at two sides through connecting pins at two ends.

In addition, the turnover connecting rod is characterized in that the turnover connecting rod is connected with the end parts of the I connecting rods at the two ends of the turnover connecting rod in a reversible mode through a connecting pin, and the welding gun support is located in the middle between the connecting pin and the connecting pin.

Advantageous effects of the invention

As described above, the torch angle adjusting mechanism and the cutting apparatus having the same according to the present invention can independently adjust the angle of the torch by the torch overturning link which is specially provided, and thus have high flexibility, high operation speed, and high production efficiency.

Brief description of the drawings

FIG. 1 is a schematic view of a cutting apparatus with a welding gun angle adjusting mechanism according to an embodiment of the present invention.

Fig. 2 is a front view of the cutting device shown in fig. 1.

Fig. 3 is an enlarged view of the upper structure of the cutting apparatus shown in fig. 1.

Fig. 4 and 5 are diagrams illustrating an angle adjusting mechanism according to an embodiment of the present invention.

Fig. 6a and 6b are views for explaining the operation principle of the angle adjusting mechanism shown in fig. 4.

Fig. 7 and 8 are views illustrating the overall operation of the cutting apparatus shown in fig. 1.

Detailed Description

In the following we will refer to the accompanying drawings of an embodiment of the invention for further details.

Fig. 1 is a schematic view of a cutting apparatus (11) having a torch angle adjusting mechanism (55) according to an embodiment of the present invention, and fig. 2 is a front view of the cutting apparatus shown in fig. 1. In addition, fig. 3 is an enlarged schematic view of the upper structure of the cutting apparatus shown in fig. 1.

The torch angle adjusting mechanism (55) in the present embodiment is a component included in the cutting device (11), and will be described together with the angle adjusting mechanism (55).

As shown in the figures, the cutting device (11) in this embodiment includes a housing (13) providing an internal space, a fixing frame (16) fixed to an upper portion of the housing (13), a 1 st output unit (17) disposed on the fixing frame (16), and a lifting unit configured to move up and down through the first output unit (17).

First, the housing (13) is a steel body having a substantially box-like shape, and a support ring (15) is provided at the bottom thereof, the support ring (15) provides a through-hole (15a) that opens to the lower surface of the housing (13), and the through-hole (15a) is a hole through which a lifting rod (23) described later passes.

The fixed frame (16) is a support fixed on the upper part of the shell (13), and supports a lifting induction motor (17a) which enables a screw rod (17e) to rotate as a shaft, a driving belt pulley (17b), a driven belt pulley (17c) and a transmission belt (17 d).

The transmission belt (17d) serves to transmit the rotational force of the driving pulley (17b) to the driven pulley (17c) when the elevating induction motor (17a) is operated. A screw (17e) is fixed to the rotation center of the driven pulley (17 c). The lead screw (17e) is driven by the lifting induction motor (17a) to rotate in a bidirectional shaft manner, so that the lifting of the lifter body (19) is realized.

The elevator body (19) is a member engaged with the lead screw (17e), and has a vertical guide rail (19a) on one side. The guide rail (19a) is supported by a rail guide (16a) provided in the fixed frame (16) and guides the vertical lifting movement of the elevator body (19).

Further, the lower portion of the elevator body (19) has a holder case (19b), and the holder case (19b) is a disk-shaped member fixed to the lower portion of the elevator body (19) and accommodating a turntable (21) therein. The turntable (21) is rotatable in a state of being accommodated in the holder case (19b) together with a bearing (not shown), and a lifting rod (23) is vertically extended in parallel at a lower portion of the turntable (21).

In this way, since the turntable (21) can be rotated in a state of being accommodated in the holder case (19b), the holder case (39) can be rotated in the arrow Z direction as shown in fig. 4. This means that the support housing (39) can be rotated about an arbitrary axis in the state in which the housing (13) is fixed.

In addition, the housing (13) has a lead wire lifting part. The lead lifting part is a part of a soft lead fixedly connected to the rear end of the welding gun (10), and plays a role of lifting the lead (10a) to a lifting height when the rear end of the welding gun (10) is lifted. Without the lead lifting part, the lead falls down during the working process of the cutting device, which may affect the rapid operation. Of course, when the rear end of the welding gun (10) descends, the wire lifting part also descends to the corresponding descending height.

The wire raising and lowering section extends vertically upward in a state of being fixed to the lower end of the housing (13), and includes a vertical rod (27) having a guide rail (27a) on one side, a holding bracket (29) for supporting the guide rail (27a) to be raised, and a wire holder (29a) fixed to the holding bracket (29). The lead holder (29a) is annular, and the torch lead (10a) is fixed through the inside thereof.

Moreover, an air spring (31) is arranged on the side surface of the vertical rod (27), and the air spring (31) plays a role in adjusting the height of the clamping bracket (29). For example, when the rear end of the welding torch (10) is raised, the holding holder (29) is raised to a raised height, and when the rear end of the welding torch (10) is lowered, the holding holder (29) is lowered to a lowered height to prevent the welding torch lead (10a) from being loosened.

As a matter of course, there are many other lifting means that can replace the air spring (31) as long as these functions can be implemented.

Fig. 4 and 5 are views for explaining the angle adjusting mechanism (55) according to the embodiment of the present invention.

On the one hand, a shaft rotating motor (35) and a driving gear (37) and a driven gear (33) are provided at the lower part of the housing (13). The shaft rotating motor (35) is driven by a control signal transmitted from the outside, and rotates a drive gear (37) in a desired direction.

The driven gear (33) is engaged with the drive gear (37), and when the drive gear (37) rotates, the driven gear rotates to rotate the angle adjusting mechanism (55) along the Z-direction axis.

An angle adjusting mechanism (55) for generating rotation torque is arranged below the driven gear (33).

The angle adjusting mechanism (55) is composed of a supporting shell (39) fixed below the driven gear (33), an upper belt pulley (41) and a lower belt pulley (43) which are arranged in an accommodating space (39c) of the supporting shell (39) in a vertically separated mode, a belt (45) connected with the upper belt pulley (41) and the lower belt pulley (43), a belt fixing support (25) located at the lower portion of the lifting rod (39) and used for connecting the lifting rod (23) with the belt (45), and a connecting rod unit arranged at the rear face of the supporting shell (39).

The portion where the driven gear (33) and the support housing (39) are combined is provided with a through-hole (39b) having a certain inner diameter. The through opening (39b) is a passage through which the lifting rod (23) passes downward. The upper end of the lifting rod (23) is fixed on the turntable (21) and extends vertically downwards, and the lower end of the lifting rod is combined with the belt fixing support (25).

In particular, the geometric centre point of the through-opening (39b) coincides with an imaginary vertical line (a in fig. 6) of the rotation of the cutting device (11) in the direction of the arrow Z. That is, the support housing (39) rotates around an imaginary vertical line (A) passing through the center point of the through-hole (39 b). The vertical line (A) is also the rotation axis of the angle adjusting mechanism (55).

The support housing (39) is configured such that the vertical line (A) passes through the front of the support housing (39). This means that the support housing (39) revolves around the vertical line (A).

The vertical line (A) always passes through the lower end of the welding gun (10). That is, the welding torch (10) is not related to angular movement, and the lower end thereof always coincides with the vertical line (A). As a result, the lower end of the welding gun (10) always coincides with the axis of rotation of the angle adjusting mechanism (55) regardless of whether the welding gun (10) is in a vertically standing or horizontally reversed state.

The support housing (39) has an accommodation space (39c) that opens forward. The accommodating space (39c) accommodates the upper pulley (41), the lower pulley (43) and the belt (45), and a bracket guide (39d) is provided at the bottom.

The bracket guide (39d) is a guide member extending in the vertical direction and guides the vertical movement of the fixed bracket (25).

The belt fixing bracket (25) is slidably supported by the bracket guide (39c) and fixed to the belt (45) by the belt fixing portion (25 a). Thus, when the elevating rod (23) performs an elevating motion in accordance with the operation of the elevating induction motor (17a), the upper and lower pulleys (41,43) perform a rotational motion.

Pulley shafts (49b of fig. 6) of the upper and lower pulleys (41,43) also function as a turning shaft of a T-link (49) of the link unit. That is, the T-shaped link (49) functions as a link drive shaft and also functions as a transmission function for transmitting torque to cause the T-shaped link to rotate left and right.

The link unit includes a T-link (49) fixed to a pulley shaft (49b) at the rear of the support housing (39), and a pair of I-links (47a,47b) connected to the T-link by a connecting pin (49 a).

The T link (49) is substantially in a Roman shape, receives a rotational torque from a pulley shaft (49b) and performs a return motion, and is a connecting link for lifting the I links (47a,47b) in opposite directions.

The I links (47a,47b) extend vertically and are members having a mutually parallel configuration, which are connected by two T links (49).

Furthermore, as will be described later, the two I links (47a,47b) perform lifting movements in opposite directions by the action of the T link (49). If the right I link (47a) in the figure descends, the left I link (47b) ascends, and conversely, if the right I link (47a) ascends, the left I link (47b) descends.

In addition, the lower ends of the I connecting rods (47a and 47b) are provided with welding gun overturning connecting rods (51). The welding gun overturning connecting rod (51) is a component with a welding gun support (53), and two ends of the welding gun overturning connecting rod are connected with the I connecting rods (47a,47b) on two sides through connecting pins (51 a). When the welding gun overturning connecting rod (51) and the I connecting rods (47a and 47b) do lifting motion, the welding gun overturning connecting rod inclines to the left and the right, and the supported welding gun (10) is overturned. The lower end of the welding gun (10) is ensured not to depart from the rotation axis of the angle adjusting mechanism (55) no matter the welding gun is in a vertical state or an inclined state.

The welding gun support (53) is fixed on the welding gun turnover connecting rod (51) and plays a role in supporting the welding gun (10). In particular, the welding gun (10) can rotate around the axis in a state of being accommodated in the welding gun bracket (53). Therefore, if the torch lead (10a) is fixed to the lead holder (29a in fig. 3), the angle adjustment mechanism (55) can be rotated sufficiently. Even if the angle adjusting mechanism (55) rotates around the axis, the welding gun lead (10a) will not be wound.

Fig. 6a and 6b are views for explaining the operation principle of the angle adjusting mechanism (55) shown in fig. 4.

Before explaining the operation principle, the mechanism of the T-link (59) is analyzed, and the T-link (59) is configured by a reversing portion (49d) whose lower end performs a reversing motion around the pulley shaft (49b) as an axis, and a connecting portion (49c) which is formed integrally with the reversing portion (49d) and extends in a direction orthogonal to the longitudinal direction of the reversing portion (49 d).

The reversing portion (49d) is connected to the middle portion of the connecting portion (49 c). In addition, both ends of the connecting portion (49c) are connected to the I-links (47a,47b) on both sides by connecting pins (49 a).

As shown in fig. 6a, the I-links (47a,47b) on both sides are at the same height. Therefore, the connection portion (47c) and the gun overturning link (51) are in a horizontal state. In addition, the welding gun (10) supported by the welding gun overturning connecting rod (51) is in a vertical state. In particular, the lower end of the welding torch (10) coincides with the vertical line (A).

When the elevation induction motor (17a of fig. 2) is driven in the above state, the elevation rod (23) moves in the vertical direction regardless of the elevation or the descent, and the T-link is reversed in a certain direction.

As shown in fig. 6b, the T-link (49) is rotated clockwise on the drawing sheet with the pulley shaft (49b) as a rotation axis. The pulley shaft (49b) is constrained by the supporting shell (39), so that the pulley shaft can only rotate and cannot move up and down and left and right.

When the T link (49) is rotated in the clockwise direction as shown in fig. 6b, the entire I links (47a,47b) move to the side of the vertical line (a), and the one I link (47a) is raised and the other I link (47b) is lowered. At this time, the gun-overturning link (51) is also inclined at the same angle as the connecting part (49 c).

The lower end of the welding torch (10) is still overlapped with the vertical line (A). This operation is also the same when the T-link (49) is rotated in the opposite direction.

Fig. 7 and 8 are views for explaining the entire operation of the cutting device (11) shown in fig. 1.

Fig. 7 shows the maximum descending state of the holder case (19b) and the belt fixing holder (25) by the elevation induction motor (17 a). This is also the state where the upper and lower pulleys (41,43) rotate in the direction of arrow s.

With the rotation of the upper and lower pulleys (41,43), the T link (49) at the rear of the support housing (39) is reversed clockwise on the drawing sheet, so that the I link (47a) at one side is lifted and the I link (47b) at the other side is lowered. Consequently, the welding gun overturning connecting rod (51) is also inclined towards the corresponding direction, and the welding gun (10) is also in an angle motion state.

In this state, the cutting device (11) is moved, and the driven gear (33) is rotated to move the lower end of the welding gun (10) in accordance with the line to cut the iron plate, thereby performing the cutting operation.

As shown in fig. 8, in order to incline the welding gun (10) in the opposite direction, the holder case (19b) and the belt fixing holder (25) are lifted by the lifting induction motor (17 a). By such a lifting process, the upper and lower pulleys (41,43) are rotated in the arrow t direction, and the I-links (47a,47b) are moved to the left side of the support housing (39) on the drawing sheet.

Of course, when the I links (47a,47b) move to the left, the one I link (47a) descends, and the other I link (47b) ascends. Accordingly, the welding gun overturning link (51) is also inclined in the corresponding direction, and the welding gun (10) is supported to keep the inclined state. In this state, the lower end of the welding torch (10) is moved along the planned cutting line of the iron plate, and the cutting is continued.

Although the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made by a person having ordinary knowledge within the technical idea of the present invention.

Claims

1. The welding gun angle adjusting mechanism is characterized by comprising a lifting part, wherein the lifting part is driven by a driving part to do lifting motion in a state of being supported on a frame; the rotating force generating part is connected with the lifting part and is driven by the lifting part to generate rotating force; and a link unit which is link-connected to the rotational force generating part and converts the rotational force from the rotational force generating part into a linear motion; the overturning connecting rod is connected to the connecting rod unit and is driven by the movement force from the connecting rod unit to overturn; and a welding gun support supporting a welding gun in a state of being mounted on the turnover connecting rod,

the lifting part comprises a lifter body, and the lifter body is subjected to power from the driving part and performs lifting movement within a certain range; and a lifting rod extending downward in a state of being fixed to the elevator body and connected to the rotational force generating part; the revolving force generating part comprises more than one connecting rod driving shaft, and the connecting rod driving shaft is driven by the lifting rod to do shaft rotating motion.

2. The welding gun angle adjustment mechanism according to claim 1, wherein the rotational force generating portion includes a support housing provided at a lower portion of the frame; the upper belt pulley and the lower belt pulley are arranged in the support shell in an up-and-down isolated manner; the belt is connected with the upper belt pulley and the lower belt pulley and is combined with the lifting rod to enable the upper belt pulley and the lower belt pulley to rotate in the lifting movement process of the lifting rod; the link driving shaft supports the upper pulley and the lower pulley, and constitutes a pulley shaft transmitting the rotational force of the upper and lower pulleys to the link unit.

3. The welding gun angle adjustment mechanism according to claim 2, wherein the link unit includes a pair of I links vertically extending in a spaced state in parallel with each other; and the connecting rod is subjected to the rotating torque transmitted from the belt pulley shaft, performs reversing motion and is connected with the connecting rods of the I connecting rods at two sides in a reversing mode through the connecting pins.

4. The torch angle adjustment mechanism of claim 3, wherein the connecting link includes a reversing portion that performs a reversing motion about the pulley shaft; and the connecting part is integrated with the end part of the reversing part, extends in the direction orthogonal to the length direction of the reversing part, and is connected with the I connecting rods at two sides through connecting pins at two ends.

5. The welding gun angle adjustment mechanism according to claim 4, wherein the flip link is pivotally connected to lower ends of the I-links at both ends thereof by a connecting pin, and the welding gun holder is located at a middle portion between the connecting pin and the connecting pin.

6. The cutting device is characterized by comprising a lifting part, wherein the lifting part is driven by a driving part to do lifting motion under the state that the lifting part is supported on a frame; the rotating force generating part is rotatably arranged at the lower part of the frame, and the lifting part generates rotating force along with the lifting movement; and a link unit which is link-connected to the rotational force generating part and converts the rotational force from the link unit into a linear motion; the overturning connecting rod is connected to the connecting rod unit and is driven by the movement force from the connecting rod unit to overturn; the welding gun angle adjusting mechanism consists of the lifting part, the rotating force generating part, the connecting rod unit, the overturning connecting rod and the welding gun support; and a rotating head end provided at a lower end of the frame and rotating the rotating force generating portion about the axis; a lead lifting part which is positioned on the frame, is connected with the rear end of the welding gun, supports a soft welding gun lead extending along the length direction, is linked with the angle movement of the welding gun, lifts the welding gun lead,

wherein the lead elevating part includes a vertical rod extending vertically upward in a state of being fixed to the frame; and a lead holder supported to be movable up and down with respect to the vertical rod in a state of being coupled to a part of the welding gun lead; and a support position adjusting portion that can adjust the height of the support.

7. The cutting device according to claim 6, wherein the elevating part includes an elevator body that is subjected to power from the driving part to perform an elevating movement within a certain range; and a lifting rod extending downward in a state of being fixed to the elevator body, and connected to the rotational force generating part; the rotary force generating part comprises more than one connecting rod driving shaft, and the connecting rod driving shaft is driven by the lifting motion of the lifting rod.

8. The cutting device as claimed in claim 7, wherein the rotational force generating part includes a support housing provided at a lower portion of the frame; and upper and lower pulleys provided in the support housing in spaced relation to each other; the belt is combined with the lifting rod, and when the lifting rod performs lifting motion, the upper belt wheel and the lower belt wheel rotate; the connecting rod driving shaft supports the upper belt pulley and the lower belt pulley to form a belt pulley shaft for transmitting the rotating force of the upper belt pulley and the lower belt pulley to the connecting rod unit.

9. The cutting device according to claim 8, wherein the link unit includes a pair of I links vertically extending in a spaced state in parallel with each other; and the connecting rod receives the rotation torque from the belt pulley shaft to rotate and is connected with the I connecting rods at two sides in a reversible manner through the connecting pin.

10. The cutting device according to claim 9, wherein the connecting link includes a reversing portion that performs a reversing motion with a pulley shaft as a reversing shaft; and the connecting part is integrated with the end part of the reversing part, extends in the direction orthogonal to the length direction of the reversing part, and is connected with the I connecting rods at two sides through connecting pins at two ends.

11. The cutting apparatus as claimed in claim 10, wherein the flip link is connected to end portions of the I link at both ends thereof to be swingable by a connecting pin, and the welding gun support is located at a middle portion between the connecting pin and the connecting pin.