Laser welding tooling for alloy thin plate lap welding

Abstract

The present invention relates to the field of tooling technology, and in particular to a laser welding tool for alloy thin plate lap welding, comprising a base, wherein the front and rear ends of the base are formed with a fixing seat at one time, the fixing seat is provided with a fixing hole, the two fixing seats are provided with vertically upward stepped holes, the stepped holes of the two fixing seats are provided with a spring rod composed of a spring and a rod, the top ends of the two spring rods are jointly fixed with a pressing plate, the pressing plate is located above the top surface of the base, and the pressing plate falls on the top surface of the base when the pressing plate descends, a pressed frame is fixed on the pressing plate, the pressed frame bends upward and then extends horizontally toward the front side, a cavity communicating with each other from top to bottom is provided in the base, a first step feeding and discharging rod is installed on the base, the metal plate is fed progressively, and no manual pushing is required when multiple welding spots are formed progressively, thereby improving the welding efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of tooling, and in particular to a laser welding tooling for lap welding of alloy thin plates. Background Art

[0002] Thin plate overlap welding refers to a welding method in which two metal plates are stacked up and down and then welded together by a spot welding machine. During welding, the two metal plates are stacked and placed on the workbench of the spot welding machine. The head of the spot welding machine descends with the electrode rod, and the bottom end of the electrode rod falls on the upper metal plate. A large current is passed through the electrode rod, and the large current is used to quickly weld the upper metal plate and the lower metal plate together.

[0003] When the electrode rod applies force to the metal plate, there is a lack of positioning mechanism, causing the upper metal plate to deviate relative to the lower metal plate, which affects the product quality after welding. Every time the electrode rod welds a weld point on the metal plate, the metal plate needs to be manually fed to the discharge side so that the electrode rod can weld the next weld point on the metal plate. The efficiency of progressive manual feeding is low. Summary of the invention

[0004] In order to solve the above problems, the present invention provides the following technical solutions:

[0005] A laser welding tool for lap welding of alloy thin plates comprises a base, wherein the front and rear ends of the base are formed with a fixed seat at one time, the fixed seat is provided with a fixing hole, the two fixed seats are provided with vertically upward stepped holes, the stepped holes of the two fixed seats are provided with a spring rod composed of a spring and a rod, the top ends of the two spring rods are jointly fixed with a pressure plate, the pressure plate is located above the top surface of the base, and the pressure plate falls on the top surface of the base when it descends, a pressed frame is fixed on the pressure plate, the pressed frame bends upward and then extends horizontally toward the front side, a cavity communicating with the upper and lower sides is provided in the base, a first step feed-in and feed-out rod is installed on the base, the first step feed-in and feed-out rod passes through the cavity front and back, and the front and rear ends of the first step feed-in and feed-out rod are installed by bearings On the base, a driving wheel is installed at the rear end of the first step in-and-out material rod, and a clamping assembly for controlling its rotation and braking is installed on the driving wheel. A driving rod is connected to the rear end of the pressure plate, and the driving rod extends toward the end direction of the first step in-and-out material rod and then vertically downward, and the vertical bottom end of the driving rod approaches the clamping assembly downward. When the pressure plate rises relative to the top surface of the base, the clamping assembly is driven to rotate by the driving rod, and the driving wheel is rotated by the clamping assembly; when the pressure plate descends relative to the top surface of the base, the clamping assembly is driven to idle by the driving rod, so that the driving wheel is free from the restriction of the clamping assembly and the rotation stops. A friction sleeve is fixed to the first step in-and-out material rod, and the friction sleeve is located in the cavity.

[0006] Further preferably, the driving wheel is provided with an annular groove, the clamping assembly includes a ratchet fixed in the annular groove by a key connection, a circle of pawls is arranged in an annular array on the circumferential surface of the ratchet, the driving rod extends into the annular groove of the driving wheel when the driving rod descends, the driving rod is provided with a hinge groove, the clamping assembly also includes a pin shaft fixed in the hinge groove, and also includes a locking block connected in the hinge groove through the pin shaft, a bending spring is connected between the top of the locking block and the top of the hinge groove, the locking block is triangular, the largest side of the locking block faces the ratchet, the second side of the locking block faces upward and faces the top of the hinge groove, the third side of the locking block faces downward and faces the inner surface of the hinge groove, and the pawl is inclined in the direction of the locking block.

[0007] Further preferably, two guide seats are symmetrically fixed on the front and rear outer walls on the left side of the base, and two guide seats are also symmetrically fixed on the front and rear outer walls on the right side of the base. Guide wheels are installed on the guide seats, and the top surface of the guide wheels is higher than the top surface of the base.

[0008] Further preferably, the pressure plate is provided with a leakage opening downwardly communicating with the cavity, and when the pressure plate falls on the top surface of the base, the leakage opening and the cavity overlap vertically.

[0009] Further preferably, the pressure plate is a circular ring, the base is a circular seat, and the cavity is a circular cavity.

[0010] Further preferably, a second step-in-and-out rod and a third step-in-and-out rod are mounted on the base via bearings, and the second step-in-and-out rod is located between the third step-in-and-out rod and the first step-in-and-out rod;

[0011] The friction sleeve located in the cavity is installed on both the second step in-and-out rod and the third step in-and-out rod, and the driving wheel and the clamping assembly are only installed on the first step in-and-out rod.

[0012] Further preferably, the friction sleeve is a solid polyurethane sleeve.

[0013] Further preferably, there are two pressed frames, and the two pressed frames are symmetrical front to back, and the top ends of the pressed frames extend horizontally to a quarter of the top of the base.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The upper metal plate is welded to the lower metal plate through this melting point. Before welding, the head of the spot welding machine will squeeze the pressed frame through the bottom structure, and the pressed frame will push the pressing plate down, so that the bottom surface of the pressing plate falls on the upper metal plate and provides pressure to the upper metal plate. The upper metal plate provides pressure to the lower metal plate. When the electrode rod spot welds the two metal plates together, it ensures that the upper metal plate will not deflect relative to the lower metal plate, thereby improving the welding quality.

[0016] 2. A stepping discharge rod and a clamping assembly are provided on the pressed frame and the in-and-out rod relative to the in-and-out rod. When the pressed frame descends with the pressing plate, in addition to positioning the metal plate to be welded, the clamping relationship between the pawl and the ratchet in the clamping assembly is utilized to drive the friction sleeve to rotate, and the rotational power of the friction sleeve is transmitted to the bottom metal plate, and the bottom metal plate is utilized to carry the upper metal plate for progressive feeding, so that the next welding point position on the upper metal plate reaches the bottom of the electrode rod. After the machine head descends again with the electrode rod, a welding point is formed at the next position to be welded on the upper metal plate, so that the two metal plates are welded again. When the machine head rises again with the electrode rod, the friction sleeve is driven to rotate by the above principle, so that the metal plate is advanced again. By analogy, the two metal plates achieve the purpose of progressive feeding and progressive welding. When the metal plates are progressively fed and multiple welding points are progressively formed, no manual pushing is required, thereby improving the welding efficiency.

[0017] 3. Whether it is the pressure of the pressure plate pressing down on the upper metal plate to position the two metal plates on the base when welding, or the power when the friction sleeve rotates, it is provided by the spot welding machine head when the electrode rod is lowered. Therefore, in order to make the pressure plate and friction sleeve move, no additional power is required, the cost is low, and the functionality of the tooling is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram showing a front side view of a laser welding tool for lap welding of alloy sheets provided in an embodiment of the present invention, and feeding from the left side;

[0019] Figure 2 The laser welding tool for alloy sheet lap welding provided in the embodiment of the present invention comprises Figure 1 The enlarged schematic diagram of the A part is shown;

[0020] Figure 3 A schematic diagram of a laser welding tool for lap welding of alloy sheets provided in an embodiment of the present invention from another perspective;

[0021] Figure 4 The laser welding tool for alloy sheet lap welding provided in the embodiment of the present invention comprises Figure 3 The enlarged schematic diagram of the B part is shown;

[0022] Figure 5 The laser welding tool for alloy sheet lap welding provided in the embodiment of the present invention comprises Figure 1 The C-direction plane diagram is derived;

[0023] Figure 6 The laser welding tool for alloy sheet lap welding provided in the embodiment of the present invention comprises Figure 5 The enlarged schematic diagram of the D part is shown;

[0024] Figure 7 A diagram showing the working principle of a laser welding tool for lap welding of alloy sheets provided in an embodiment of the present invention, shown in a left plane diagram.

[0025] In the figure: 1. base; 2. fixing seat; 3. fixing hole; 4. stepped hole; 5. spring rod; 6. pressure plate; 7. pressed frame; 8. cavity; 9. first step feed and discharge rod; 10. driving wheel; 11. clamping assembly; 12. driving rod; 13. friction sleeve; 14. guide seat; 15. leakage; 16. annular groove; 17. ratchet; 18. pawl; 19. hinge groove; 20. pin shaft; 21. locking block; 22. second step feed and discharge rod; 23. third step feed and discharge rod; 24. guide wheel; 25. bending spring. DETAILED DESCRIPTION

[0026] The above and other embodiments and advantages of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments.

[0027] In one embodiment, if Figure 1-Figure 7 As shown: This embodiment provides a laser welding tool for alloy sheet lap welding, including a base 1, a fixing seat 2 is formed at the front and rear ends of the base 1, and a fixing hole 3 is opened on the fixing seat 2. Bolts are inserted into the fixing holes 3, and the base 1 is fixed on the loading platform of the spot welding machine through the fixing seat 2, and after being fixed, the base 1 is pressed Figure 1 As shown, the metal plate is fed from left to right during use.

[0028] The two fixed seats 2 are provided with stepped holes 4 pointing vertically upward, and the stepped holes 4 of the two fixed seats 2 are provided with spring rods 5 composed of springs and rods. The top ends of the two spring rods 5 are fixed with a pressing plate 6, which is located above the top surface of the base 1. When the pressing plate 6 descends, it falls on the top surface of the base 1. A pressed frame 7 is fixed on the pressing plate 6. The pressed frame 7 is bent upward and then extends horizontally to the front side to one-fourth of the top of the pressing plate 6. A cavity 8 communicating with each other from top to bottom is provided in the base 1. A first step in-and-out material rod 9 is installed on the base 1. The first step in-and-out material rod 9 passes through the cavity 8 front and back. The front and rear ends of the first step in-and-out material rod 9 are installed on the base 1 through bearings, and the rear end of the first step in-and-out material rod 9 is installed with a driving wheel 10 A clamping assembly 11 for controlling its rotation and braking is installed on the driving wheel 10. A driving rod 12 is connected to the rear end of the pressing plate 6. The driving rod 12 extends toward the end of the first step feeding and discharging rod 9 and then vertically downward. The vertical bottom end of the driving rod 12 approaches the clamping assembly 11 downward. When the pressing plate 6 rises relative to the top surface of the base 1, the driving rod 12 drives the clamping assembly 11 to rotate, and the clamping assembly 11 drives the driving wheel 10 to rotate; when the pressing plate 6 descends relative to the top surface of the base 1, the driving rod 12 drives the clamping assembly 11 to idle, so that the driving wheel 10 is free from the restriction of the clamping assembly 11 and stops rotating. The first step feeding and discharging rod 9 is fixed with a friction sleeve 13, and the friction sleeve 13 is located in the cavity 8. The driving wheel 10 is provided with an annular groove 16, and the clamping assembly 11 includes a ratchet 17 fixed in the annular groove 16 by a key connection. A circle of pawls 18 are arranged in an annular array on the circumferential surface of the ratchet 17. When the driving rod 12 descends, it extends into the annular groove 16 of the driving wheel 10. The driving rod 12 is provided with a hinge groove 19. The clamping assembly 11 also includes a pin shaft 20 fixed in the hinge groove 19, and also includes a locking block 21 connected to the hinge groove 19 through the pin shaft 20. A bending spring 25 is connected between the top of the locking block 21 and the top of the hinge groove 19. The locking block 21 is triangular, and the largest side of the locking block 21 faces the ratchet 17, the second side of the locking block 21 faces upward and faces the top of the hinge groove 19, the third side of the locking block 21 faces downward and faces the inner surface of the hinge groove 19, and the pawl 18 is inclined in the direction of the locking block 21.

[0029] Working principle and technical effect: two plates press Figure 1 As shown in the figure, after feeding from the left side, the bottom surface of the lower plate falls on the base 1, and the Figure 7As shown, the plate is pushed under the welding machine head, the head descends and brings the electrode rod down to the upper plate. According to the working principle of the spot welding machine (the welding principle of the electrode rod of the spot welding machine is the prior art and will not be repeated), the electrode rod emits a large current and forms a melting point on the upper metal plate, so that the upper metal plate is welded to the lower metal plate through this melting point. Before welding, the head of the spot welding machine will squeeze the pressed frame 7 through the bottom structure, and the pressed frame 7 will push the pressing plate 6 down, and the rod of the two spring rods 5 will descend. The spring in 5 is compressed and shortened, and the bottom surface of the pressure plate 6 falls on the upper metal plate and provides pressure to the upper metal plate. The upper metal plate provides pressure to the lower metal plate. When the electrode rod spot welds the two metal plates together, it ensures that the upper metal plate will not deflect relative to the lower metal plate, thereby improving the welding quality. After spot welding, the head rises, the electrode rod rises and leaves the top surface of the metal plate, the bottom structure of the head leaves the pressed frame 7, the pressure on the pressed frame 7 disappears, the spring in the spring rod 5 rises, and pushes the pressure plate 6 to reset and rise.

[0030] In addition to the above, when the pressure frame 7 pushes the pressure plate 6 to descend, it will also bring the driving rod 12 down, the driving rod 12 brings the hinge slot 19 down, the hinge slot 19 brings the pin 20 down, and the pin 20 brings the locking block 21 down relative to the nearest pawl 18. Since the pawl 18 is tilted downward, the locking block 21 does not have a card-engaging relationship with the pawl 18 at that location when it descends, but uses the largest inner side to squeeze the outer side of the pawl 18 and then deflect upward around the pin 20. The top end of the locking block 21 deflects into the hinge slot 19 and squeezes the bending spring 25 to shorten it, and the bottom end of the locking block 21 is away from the inner side of the hinge slot 19. The rod 12 continues to descend, and the driving rod 12 pushes the locking block 21 to continue to descend, so that the top of the locking block 21 reaches the bottom of the pawl 18, and the bending spring 25 releases its length, providing thrust to the top of the locking block 21, forcing the top of the locking block 21 to deflect to the bottom of the pawl 18. The spot welding work is completed, and when the pressure plate 6 is reset and ascended, it will also bring the driving rod 12 up, and the driving rod 12 brings the hinge groove 19 up, and the hinge groove 19 brings the pin 20 up, and the pin 20 brings the locking block 21 up relative to the pawl 18, and the top of the locking block 21 will drag the pawl 18 upward, and the pawl 18 drives the driving wheel 10 to rotate, and the driving wheel 10 drives the first step of the feeding and discharging rod 9 to rotate. , the first step of feeding and discharging rod 9 rotates with friction sleeve 13. Since friction sleeve 13 is located in cavity 8 of base 1, and the outer circumferential surface of friction sleeve 13 is higher than the top surface of base 1, and the bottom surface of bottom metal plate is located above cavity 8 and just contacts with friction sleeve 13, the rotation of friction sleeve 13 is equivalent to providing rolling force to the bottom surface of bottom metal plate, and the bottom metal makes the metal plate move linearly with the upper metal plate toward the discharging side, so that the next position to be welded on the upper metal plate reaches below the electrode rod. After the machine head descends again with the electrode rod, a welding spot is formed at the next position to be welded on the upper metal plate, so that the two metal plates are welded again. When the pole rises again, the friction sleeve 13 is driven to rotate through the above principle, so that the metal plate is advanced again. Similarly, the two metal plates are spot welded while feeding progressively, and a row of welding spots will be evenly formed on the surface of the product. The progressive feeding method replaces the manual mode, which not only improves the welding efficiency, but also improves the welding quality. Whether it is the pressure of the pressure plate 6 pressing down on the upper metal plate to position the two metal plates on the base 1 when welding, or the power when the friction sleeve 13 rotates, it is provided by the spot welding machine head when the electrode rod is lowered. Therefore, in order to make the pressure plate 6 and the friction sleeve 13 move, no additional power is required, the cost is low, and the functionality of the tooling is improved.

[0031] In addition, two guide seats 14 are symmetrically fixed on the front and rear outer walls on the left side of the base 1, and two guide seats 14 are also symmetrically fixed on the front and rear outer walls on the right side of the base 1. Guide wheels 24 are installed on the guide seats 14, and the top surface of the guide wheel 24 is higher than the top surface of the base 1. When the two layers of metal plates are fed along the top surface of the base 1, their front and rear sides are positioned and guided by the left and right groups of guide wheels 24 to ensure that the two metal plates are fed in a straight line.

[0032] like Figure 3 As shown, the pressing plate 6 is provided with a leak 15 which is downwardly connected with the cavity 8. When the pressing plate 6 falls on the top surface of the base 1, the leak 15 and the cavity 8 overlap each other up and down. When the spot welding machine is actually used, there is also an electrode rod at the bottom. The two electrode rods are a positive electrode and a negative electrode. The bottom electrode rod is inserted into the leak 15 through the cavity 8 and is pressed upward on the bottom surface of the metal plate of the lower layer. Therefore, the purpose of providing the leak 15 is to leave space for the bottom electrode rod in actual use. The convection welding method of the two electrode rods of the spot welding machine is a prior art and will not be repeated in the present invention.

[0033] like Figure 1 , Figure 3 As shown, a second step-in-and-out rod 22 and a third step-in-and-out rod 23 are installed on the base 1 through bearings, and the second step-in-and-out rod 22 is located between the third step-in-and-out rod 23 and the first step-in-and-out rod 9; the second step-in-and-out rod 22 and the third step-in-and-out rod 23 are both installed with a friction sleeve 13 located in the cavity 8, and the driving wheel 10 and the clamping assembly 11 are only installed on the first step-in-and-out rod 9, that is, the effect of the clamping assembly 11 is also only reflected on the first step-in-and-out rod 9, and the first step-in-and-out rod 9 is located on the feeding side. Through the intermittent rotation of the first step-in-and-out rod 9 with the friction sleeve 13, the metal plate can be fed progressively, and the second step-in-and-out rod 22 and the third step-in-and-out rod 23 play a role of auxiliary support and auxiliary rolling feeding, so that the bottom of the metal plate forms a better feeding effect when the metal plate is progressively fed.

[0034] The friction sleeve 13 is a solid polyurethane sleeve and will not damage the metal plate during rotation.

[0035] The above orientation designations do not represent the specific orientations of the components in this implementation scheme. This implementation scheme is only for the convenience of describing the scheme, and the orientations are described relatively with reference to the figures. In essence, the specific orientations of the components are described according to their actual installation and actual use as well as the customary orientations of technicians in this field. This is hereby explained.

[0036] The specific implementation methods described above further describe the invention purpose, technical solutions, and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the protection scope of the present invention. It is particularly pointed out that for those skilled in the art, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A laser welding tool for lap welding of alloy thin plates, characterized in that: The invention comprises a base (1), wherein the front and rear ends of the base (1) are formed with a fixing seat (2) at one time, the fixing seat (2) is provided with a fixing hole (3), the two fixing seats (2) are provided with a stepped hole (4) vertically upward, the stepped holes (4) of the two fixing seats (2) are provided with a spring rod (5) composed of a spring and a rod, the top ends of the two spring rods (5) are commonly fixed with a pressing plate (6), the pressing plate (6) is located above the top surface of the base (1), and the bottom surface of the pressing plate (6) falls on the bottom surface after the pressing plate (6) is lowered. On the top surface of the base (1), a pressed frame (7) is fixed to the rear of the top surface of the pressing plate (6), and the pressed frame (7) is bent upward and then horizontally extended to the front side to a quarter of the pressing plate (6). A cavity (8) communicating with each other from top to bottom is provided in the base (1), and a first step inlet and outlet rod (9) is installed on the base (1), and the first step inlet and outlet rod (9) passes through the cavity (8) from front to back, and the front and rear ends of the first step inlet and outlet rod (9) are installed on the base (1) through bearings. The rear end of the first step inlet and outlet rod (9) is provided with a driving wheel (10), and a clamping assembly (11) for controlling its rotation and braking is installed on the driving wheel (10). The rear end of the pressing plate (6) is connected with a driving rod (12), and the driving rod (12) extends toward the end of the first step inlet and outlet rod (9) and then vertically downwards. The vertical bottom end of the driving rod (12) approaches the clamping assembly (11) downwards. When the pressing plate (6) rises relative to the top surface of the base (1), the clamping assembly (11) is pressed by the pressing plate (6). The driving rod (12) drives the clamping assembly (11) to rotate, and the clamping assembly (11) drives the driving wheel (10) to rotate; when the pressure plate (6) descends relative to the top surface of the base (1), the driving rod (12) drives the clamping assembly (11) to idle, so that the driving wheel (10) is freed from the restriction of the clamping assembly (11) and stops rotating, and the first step feeding and discharging rod (9) is fixed with a friction sleeve (13), and the friction sleeve (13) is located in the cavity (8).

2. The laser welding tool for alloy sheet lap welding according to claim 1, characterized in that: The driving wheel (10) is provided with an annular groove (16), the clamping assembly (11) comprises a ratchet (17) fixed in the annular groove (16) by means of a key connection, a circle of ratchet pawls (18) are arranged in an annular array on the circumferential surface of the ratchet (17), the driving rod (12) extends into the annular groove (16) of the driving wheel (10) when descending, the driving rod (12) is provided with an articulation groove (19), the clamping assembly (11) further comprises a pin shaft (20) fixed in the articulation groove (19), and further comprises a pin shaft (20) fixed in the articulation groove (19) through the pin shaft (20) A locking block (21) is connected to the hinge groove (19), a bending spring (25) is connected between the top of the locking block (21) and the top of the hinge groove (19), the locking block (21) is triangular, the largest side of the locking block (21) faces the ratchet (17), the second side of the locking block (21) faces upward and faces the top of the hinge groove (19), the third side of the locking block (21) faces downward and faces the inner surface of the hinge groove (19), and the ratchet pawl (18) is inclined in the direction of the locking block (21).

3. The laser welding tool for alloy sheet lap welding according to claim 2, characterized in that: Two guide seats (14) are symmetrically fixed on the front and rear outer walls on the left side of the base (1), and two guide seats (14) are also symmetrically fixed on the front and rear outer walls on the right side of the base (1). A guide wheel (24) is mounted on the guide seat (14), and the top surface of the guide wheel (24) is higher than the top surface of the base (1).

4. The laser welding tool for alloy sheet lap welding according to claim 3, characterized in that: The pressing plate (6) is provided with a leak (15) communicating downwardly with the cavity (8); when the pressing plate (6) falls on the top surface of the base (1), the leak (15) and the cavity (8) overlap vertically.

5. The laser welding tool for alloy sheet lap welding according to claim 4, characterized in that: The pressing plate (6) is a circular ring, the base (1) is a circular seat, and the cavity (8) is a circular cavity.

6. The laser welding tool for alloy sheet lap welding according to claim 5, characterized in that: A second step-in-and-out material rod (22) and a third step-in-and-out material rod (23) are mounted on the base (1) via bearings, and the second step-in-and-out material rod (22) is located between the third step-in-and-out material rod (23) and the first step-in-and-out material rod (9); The friction sleeve (13) located in the cavity (8) is mounted on both the second step in-and-out rod (22) and the third step in-and-out rod (23), and the driving wheel (10) and the clamping assembly (11) are only mounted on the first step in-and-out rod (9).

7. The laser welding tool for alloy sheet lap welding according to claim 6, characterized in that: The friction sleeve (13) is a solid polyurethane sleeve.

8. The laser welding tool for alloy sheet lap welding according to claim 7, characterized in that: There are two pressed frames (7), and the two pressed frames (7) are symmetrical front to back, and the top of the pressed frame (7) extends horizontally to a quarter of the top of the base (1).

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