Ultrasonic continuous welding equipment for variable-thickness workpiece and welding method of ultrasonic continuous welding equipment

Abstract

The invention discloses ultrasonic continuous welding equipment for variable-thickness workpieces and a welding method of the ultrasonic continuous welding equipment. The ultrasonic continuous welding equipment comprises a workbench for clamping the workpieces, a pre-pressing mechanism, a welding head assembly and a consolidation mechanism, wherein the pre-pressing mechanism, the welding head assembly and the consolidation mechanism are sequentially arranged above the workbench in the Y direction and synchronously move in the X direction, the Y direction and the Z direction along with a back plate. The consolidation mechanism comprises a consolidation seat and a moving block which are arranged up and down, the consolidation seat and the moving block are combined with an upper rod and a lower rod to form a parallelogram structure inclining towards the welding head assembly, and the lower rod is assembled in a long hole of the consolidation seat in a sliding mode through a moving pin; the movable block is provided with a swing block through a first rotating piece, and the bottom surface of the swing block is provided with a consolidation block. The length direction of the long hole and the axial direction of the first rotating piece are both arranged in the Y-axis direction. The pre-pressing mechanism comprises a pre-pressing base, a swing arm is rotationally installed on the pre-pressing base and inclines towards the welding head assembly, and a pre-pressing roller is installed at the bottom end of the swing arm. Therefore, the distance problem is solved, the device is particularly suitable for welding of workpieces with variable thicknesses, the welding quality is greatly guaranteed, and the welding flexibility is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment, in particular to an ultrasonic continuous welding equipment for workpieces with variable thickness and a welding method thereof. Background Art

[0002] Existing ultrasonic welding is mainly spot welding, that is, the ultrasonic welding head contacts the workpiece for welding and then immediately loses contact with the workpiece. The welding range is small and can only connect a small range, and long-distance welding between workpieces cannot be achieved.

[0003] In ultrasonic continuous welding, the welding head needs to be in close contact with the workpiece, and the welding head moves relative to the workpiece without stopping. In the existing continuous welding process, the workpiece in contact with the welding head will be deformed due to melting, which will cause the workpiece at the front end of the welding head to tilt and affect the weldability; in addition, where the welding head passes, the workpiece is still in a molten state and needs to be pressurized for a period of time to keep the workpiece under pressure and cool to ensure the welding quality.

[0004] In addition, since the standard welding head assembly is usually larger at the top and smaller at the bottom, in order to ensure that the welding head assembly moves up and down smoothly without colliding with the pre-pressure and consolidation mechanisms in the front and rear, the pre-pressure and consolidation mechanisms are usually installed at a certain distance in front and behind the welding head assembly; the long interval distance ensures space for the welding head assembly to move up and down, but the long distance is not conducive to maintaining the welding quality, especially for the consolidation mechanism, which cannot effectively maintain pressure in the molten state due to the distance. Summary of the invention

[0005] To solve the above problems, the present invention provides a rationally structured ultrasonic continuous welding device and a welding method for workpieces with variable thickness, thereby overcoming the distance problem. The device is particularly suitable for welding workpieces with varying thickness, greatly ensuring welding quality and welding flexibility.

[0006] The technical solution adopted by the present invention is as follows:

[0007] An ultrasonic continuous welding device for workpieces of variable thickness comprises a bed, a workbench is installed in the middle of the top surface of the bed, and the workpiece is clamped on the workbench; a pre-pressing mechanism, a welding head assembly, and a consolidation mechanism are arranged in sequence above the workbench along the Y direction, the pre-pressing mechanism, the welding head assembly, and the consolidation mechanism are respectively installed on the side of a back plate through corresponding lifting mechanisms, and the pre-pressing mechanism, the welding head assembly, and the consolidation mechanism move synchronously with the back plate in the X direction, the Y direction, and the Z direction;

[0008] The consolidation mechanism includes a consolidation seat and a moving block arranged up and down, an upper rod and a lower rod are rotatably installed between the consolidation seat and the moving block, forming a parallelogram structure inclined toward the welding head assembly, and the lower rod is slidably fitted in the long hole of the consolidation seat through a moving pin; the moving block is installed with a swing block through a rotating member 1, and a consolidation block is installed on the bottom surface of the swing block; the length direction of the long hole and the axial direction of the rotating member 1 are arranged along the Y-axis direction;

[0009] The pre-pressing mechanism comprises a pre-pressing seat, on which a swing arm is rotatably mounted, the swing arm is inclined toward the welding head assembly, and a pre-pressing roller is mounted at the bottom end of the swing arm.

[0010] As a further improvement of the above technical solution:

[0011] The relative edges of the bed extend upward to form side walls, a crossbeam is installed on the side wall via an X-direction moving assembly, a Y-direction moving seat is installed on the crossbeam via a Y-direction moving assembly, a back plate is installed on the side of the Y-direction moving seat via a lifting assembly, and a workbench is installed on the top surface of the bed between the two side walls.

[0012] The welding head assembly is installed on the side of the back plate via the welding head lifting assembly, the pre-pressing mechanism is installed on the side of the back plate via the lifting drive assembly 1, and the consolidation mechanism is installed on the side of the back plate via the lifting drive assembly 2; the pre-pressing mechanism is installed on the bottom end of the lifting drive assembly 1 via the movable adjustment mechanism, and the consolidation mechanism is installed on the bottom end of the lifting drive assembly 2 via another set of movable adjustment mechanisms; the adjustment direction of the movable adjustment mechanism is along the Y direction.

[0013] The structure of the lifting drive component 1 is the same as that of the lifting drive component 2, and the structure is as follows: it includes a lifting guide component vertically installed on the back plate, a sliding plate is slidably installed on the lifting guide component, and a lifting seat is installed at the bottom of the sliding plate; it also includes a support arranged across the sliding plate, a linear driving power is installed on the support, and the output end of the linear driving power faces downward and is connected to the lifting seat.

[0014] The bottom surface of the lifting seat extends downward to form T-shaped ribs arranged in the Y direction. The top surfaces of the consolidation seat and the pre-pressing seat are respectively provided with T-shaped slots arranged along the Y direction. The T-shaped ribs are installed in the corresponding T-shaped slots to form a movable adjustment mechanism. The threaded holes passing through the consolidation seat or the pre-pressing seat laterally are locked with top screws, and the inner ends of the top screws abut against the T-shaped ribs.

[0015] The middle part of the upper rod is rotatably installed on the consolidation seat via a rotating shaft 1, a swing pin 1 is installed on the upper end of the upper rod, and an arc hole 1 for swinging and fitting the swing pin 1 is opened on the consolidation seat, and the arc hole 1 takes the rotating shaft 1 as the center of the circle; the middle part of the swing arm is rotatably installed on the pre-stressing seat via a rotating shaft 2, a swing pin 2 is installed on the upper end of the swing arm, and an arc hole 2 for swinging and fitting the swing pin 2 is opened on the pre-stressing seat, and the arc hole 2 takes the rotating shaft 2 as the center of the circle.

[0016] The consolidation mechanism also includes a V-shaped block, one end of the V-shaped block is rotatably mounted on the consolidation seat via bolt 1, the other end of the V-shaped block is hung with an elastic member via bolt 2, and the upper end of the elastic member is mounted on the consolidation seat; the movable pin is located inside the V-shaped structure of the V-shaped block.

[0017] The bottom surface of the moving block and the top surface of the swing block are matched with each other in a concave-convex structure; the consolidation block is embedded in the bottom surface of the swing block, and a fastener is installed laterally through the swing block lock, and the inner end of the fastener abuts against the consolidation block.

[0018] A roller seat is installed at the lower part of the swing arm in the pre-pressing mechanism via a second rotating member, a pre-pressing roller is rotatably installed on the roller seat, and the axial direction of the pre-pressing roller is arranged along the Y axis.

[0019] A welding method of an ultrasonic continuous welding device for workpieces of variable thickness comprises the following steps:

[0020] Clamp the workpiece on the workbench;

[0021] The welding head assembly independently descends to the lowest end under the drive of the corresponding lifting mechanism, and the welding head assembly contacts the workpiece for positioning; at this time, the pre-pressing mechanism and the consolidation mechanism are away from the welding head assembly in the Y direction;

[0022] The pre-pressing mechanism and the consolidating mechanism are driven by the corresponding lifting mechanisms to move downwards respectively;

[0023] After the consolidation block and the pre-pressing roller contact the workpiece surface respectively, they continue to move downward, causing the moving block in the consolidation mechanism to move toward the welding head assembly, and the swing arm in the pre-pressing mechanism to move toward the welding head assembly, so that the distance between the consolidation block and the welding head assembly, and the distance between the pre-pressing roller and the welding head assembly respectively reach a preset smaller spacing;

[0024] When the thickness of the workpiece gradually increases upward or decreases downward in the welding direction, the consolidation block, the swing block and the moving block will react to the lower rod, causing the end of the lower rod to move along the long hole through the moving pin, so that the bottom surface of the consolidation block can be adaptively tilted along the workpiece surface and remain in contact with the workpiece;

[0025] When the thickness of the workpiece changes in the X direction perpendicular to the welding direction, the consolidation block and the swing block will be caused to deflect relative to the moving block with the rotating part as the axial direction, so that the consolidation block can tilt adaptively with the workpiece surface and keep in contact with the workpiece.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] During welding, as the consolidation mechanism and the pre-pressing mechanism continue to move downward, the consolidation block and the pre-pressing roller can be urged to move toward the welding head assembly to reduce the distance while ensuring the space for the welding head assembly to move up and down, which greatly helps to ensure the welding quality of continuous welding, and is particularly suitable for the case where the upper size of the welding head is large.

[0028] The present invention also includes the following advantages:

[0029] In the consolidation mechanism, the moving block is installed under the consolidation seat through a parallelogram structure, which effectively ensures the levelness of the moving block, the swing block, especially the bottom surface of the consolidation block, and ensures the surface-to-surface contact and fit between the bottom surface of the consolidation block and the surface of the workpiece; through the arrangement of the long hole on the consolidation seat and the moving pin on the lower rod, when a slope appears on the surface of the workpiece, the consolidation block can be adaptively swung and adjusted in the front and rear directions as the moving pin moves in the long hole;

[0030] The V-shaped blocks and elastic parts are set to effectively ensure the fit between the bottom surface of the consolidation block and the slope surface of the workpiece;

[0031] The combination of the swing pin and the arc hole effectively limits the swing range of the consolidation mechanism and the pre-pressing mechanism toward the welding head;

[0032] According to actual use requirements, the distance between the consolidation mechanism and the pre-pressing mechanism and the welding head can be adjusted through the mobile adjustment mechanism to be suitable for different continuous welding scenarios, thereby effectively improving the flexibility of welding use. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the structure of the present invention.

[0034] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0035] Figure 3 It is a schematic diagram of the installation layout of the side wall, beam and lifting assembly of the present invention.

[0036] Figure 4 It is a schematic diagram of the installation of the pre-pressing mechanism, welding head assembly and consolidation mechanism on the back plate of the present invention.

[0037] Figure 5 It is a structural schematic diagram of the lifting drive component 2 of the present invention.

[0038] Figure 6 It is a structural schematic diagram of the consolidation mechanism of the present invention.

[0039] Figure 7 It is a schematic structural diagram of the consolidation mechanism of the present invention from another perspective.

[0040] Figure 8 It is a structural schematic diagram of the pre-pressing mechanism of the present invention.

[0041] Fig. 9 It is a schematic diagram of the positions of the pre-pressing mechanism, welding head assembly and consolidation mechanism in the natural state of the present invention.

[0042] Fig.10 It is a schematic diagram of the state when the pre-pressing mechanism and the consolidation mechanism of the present invention are in downward contact with the workpiece.

[0043] Fig.11 It is a schematic diagram of the positions of the pre-pressing mechanism, welding head assembly and consolidation mechanism during welding of the present invention.

[0044] Fig.12 It is a schematic diagram of the state of the consolidation mechanism when the thickness changes in the welding direction of the present invention.

[0045] Fig.13 It is a schematic diagram of the state of the consolidation mechanism when the thickness changes in the vertical direction of welding according to the present invention.

[0046] Among them: 1. bed; 2. workbench; 3. side wall; 4. crossbeam; 5. lifting assembly; 6. back plate; 7. pre-pressing mechanism; 8. welding head assembly; 9. consolidation mechanism; 10. workpiece;

[0047] 31. X-axis moving assembly; 41. Y-axis moving assembly; 42. Y-axis moving seat;

[0048] 70. Lifting drive assembly 1; 71. Pre-pressing seat; 72. Swing arm; 73. Rotating member 2; 74. Pre-pressing roller; 75. Roller seat; 76. Rotating shaft 2; 77. Swing pin 2; 711. Arc hole 2;

[0049] 80. Welding head lifting assembly;

[0050] 90. Lifting drive assembly 2; 91. Consolidation seat; 92. Moving block; 93. Swinging block; 94. Consolidation block; 95. Upper rod; 96. Lower rod; 97. V-shaped block; 98. Elastic member; 99. Moving pin;

[0051] 901, lifting guide assembly; 902, support; 903, sliding plate; 904, linear drive power; 905, lifting seat; 906, T-shaped rib; 910, rotating shaft 1; 911, threaded hole; 912, arc hole 1; 913, swing pin 1; 914, long hole; 915, T-shaped slot; 920, rotating part 1; 971, bolt 1; 972, bolt 2. DETAILED DESCRIPTION

[0052] The specific implementation of the present invention is described below in conjunction with the accompanying drawings.

[0053] like Figure 1and Figure 2 As shown, the ultrasonic continuous welding equipment for variable thickness workpieces of this embodiment includes a bed 1, a workbench 2 is installed in the middle of the top surface of the bed 1, and a workpiece 10 is clamped on the workbench 2; a pre-pressing mechanism 7, a welding head assembly 8, and a consolidation mechanism 9 are arranged in sequence along the Y direction above the workbench 2, and the pre-pressing mechanism 7, the welding head assembly 8, and the consolidation mechanism 9 are respectively installed on the side of the back plate 6 through corresponding lifting mechanisms, and the pre-pressing mechanism 7, the welding head assembly 8, and the consolidation mechanism 9 move synchronously with the back plate 6 in the X direction, the Y direction, and the Z direction;

[0054] like Figure 4 and Figure 6 As shown, the consolidation mechanism 9 includes a consolidation seat 91 and a moving block 92 arranged up and down, an upper rod 95 and a lower rod 96 are rotatably installed between the consolidation seat 91 and the moving block 92, forming a parallelogram structure inclined toward the welding head assembly 8, and the lower rod 96 is slidably fitted in the long hole 914 of the consolidation seat 91 through a moving pin 99; the moving block 92 is installed with a swing block 93 through a rotating member 920, and the bottom surface of the swing block 93 is installed with a consolidation block 94; the length direction of the long hole 914 and the axial direction of the rotating member 920 are both arranged along the Y-axis direction;

[0055] like Figure 8 As shown, the pre-pressing mechanism 7 includes a pre-pressing seat 71 , on which a swing arm 72 is rotatably mounted. The swing arm 72 is inclined toward the welding head assembly 8 , and a pre-pressing roller 74 is mounted at the bottom end of the swing arm 72 .

[0056] In this embodiment, during welding, as the consolidation mechanism 9 and the pre-pressing mechanism 7 continue to move downward, while ensuring that the consolidation block 94 and the pre-pressing roller 74 are in contact with the surface of the workpiece 10, the consolidation block 94 and the pre-pressing roller 74 can also be prompted to move toward the welding head assembly 8 to shorten the distance, thereby effectively overcoming the distance problem while ensuring space for the welding head assembly 8 to move up and down.

[0057] In the consolidation mechanism 9, a parallelogram structure is used to realize the installation of the moving block 92 under the consolidation seat 91, which effectively ensures the levelness of the moving block 92, the swing block 93, and especially the bottom surface of the consolidation block 94, and ensures the surface-to-surface contact and fit between the bottom surface of the consolidation block 94 and the surface of the workpiece 10; through the setting of the long hole 914 on the consolidation seat 91 and the moving pin 99 on the lower rod 96, when a slope appears on the surface of the workpiece 10, as the moving pin 99 moves in the long hole 914, the consolidation block 94 can be adaptively swung and adjusted in the front and rear directions.

[0058] like Figure 1 and Figure 3As shown, the relative edges of the bed 1 extend upward to form side walls 3, a crossbeam 4 is installed on the side wall 3 via an X-direction moving component 31, a Y-direction moving seat 42 is installed on the crossbeam 4 via a Y-direction moving component 41, a back plate 6 is installed on the side of the Y-direction moving seat 42 via a lifting component 5, and a workbench 2 is installed on the top surface of the bed 1 between the two side walls 3.

[0059] In this embodiment, the X-axis moving component 31 and the Y-axis moving component 41 can adopt existing conventional moving components, such as a moving component that is rotated by a motor to move along the length direction of the rack, and can be combined with a guide rail to ensure the direction of movement according to actual needs.

[0060] The lifting assembly 5 may also adopt an existing conventional structure, such as a lifting structure driven by a motor via a lead screw and a screw pair, which can realize the movement and adjustment of the back plate 6 in the Z direction.

[0061] In actual use, continuous welding in the Y direction can be achieved by moving the back plate 6 on the beam 4 along the Y direction. During the welding process, the pre-pressing mechanism 7 pre-presses the position of the workpiece 10 to be welded, and the consolidation mechanism 9 presses and cools the position of the workpiece 10 that is still in a molten state, thereby effectively ensuring the welding quality of continuous welding.

[0062] The welding head assembly 8 is installed on the side of the back plate 6 via the welding head lifting assembly 80, the pre-pressing mechanism 7 is installed on the side of the back plate 6 via the lifting drive assembly 1 70, and the consolidation mechanism 9 is installed on the side of the back plate 6 via the lifting drive assembly 2 90; the pre-pressing mechanism 7 is installed on the bottom end of the lifting drive assembly 1 70 via the movable adjustment mechanism, and the consolidation mechanism 9 is installed on the bottom end of the lifting drive assembly 2 90 via another set of movable adjustment mechanisms; the adjustment direction of the movable adjustment mechanism is along the Y direction.

[0063] In this embodiment, the distance between the consolidation mechanism 9 and the pre-pressing mechanism 7 and the welding head assembly 8 can be adjusted by the mobile adjustment mechanism according to actual use requirements to adapt to different continuous welding scenarios, thereby effectively improving the flexibility of welding use.

[0064] The structure of the lifting drive assembly 1 70 is the same as that of the lifting drive assembly 2 90. Figure 5 As shown, its structure is as follows: it includes a lifting guide component 901 vertically installed on the back plate 6, a sliding plate 903 is slidably installed on the lifting guide component 901, and a lifting seat 905 is installed at the bottom end of the sliding plate 903; it also includes a support 902 arranged across the sliding plate 903, a linear drive power 904 is installed on the support 902, and the output end of the linear drive power 904 faces downward and is connected to the lifting seat 905.

[0065] In this embodiment, the overall structure of the lifting drive assembly 1 70 and the lifting drive assembly 2 90 is compact, ingenious and reasonable, and the mechanism layout for driving the lifting seat 905 to rise and fall is realized within the limited space of the back plate 6.

[0066] In this embodiment, the lifting drive assembly 1 70 and the lifting drive assembly 2 90 can be installed on the back plate 6 via the side plate component, which is convenient for actual assembly, maintenance and adjustment operations.

[0067] The bottom surface of the lifting seat 905 extends downward to form a T-shaped rib 906 arranged in the Y direction. Figure 7 , Figure 8 As shown, the top surfaces of the consolidation seat 91 and the pre-pressing seat 71 are respectively provided with T-slots 915 arranged along the Y direction, and the T-shaped ribs 906 are installed in the corresponding T-slots 915 to form a movable adjustment mechanism; the threaded hole 911 that passes through the consolidation seat 91 or the pre-pressing seat 71 laterally is locked with a top screw, and the inner end of the top screw abuts against the T-shaped rib 906.

[0068] In actual use, loosen the top screw and apply force to the consolidation seat 91 and the pre-pressing seat 71 to make them move forward or backward relative to the lifting seat 905, so as to adjust the distance between the consolidation mechanism 7, the pre-pressing mechanism 9 and the welding head assembly 8; after adjusting to the preset position, lock the top screw to fix the consolidation seat 91 and the pre-pressing seat 71 relative to the lifting seat 905.

[0069] The middle part of the upper rod 95 is rotatably installed on the consolidation seat 91 via a rotating shaft 910, and a swing pin 913 is installed on the upper end of the upper rod 95. An arc hole 912 is opened on the consolidation seat 91 for swinging the swing pin 913, and the arc hole 912 takes the rotating shaft 910 as the center of the circle; the middle part of the swing arm 72 is rotatably installed on the pre-pressing seat 71 via a rotating shaft 76, and a swing pin 77 is installed on the upper end of the swing arm 72. An arc hole 711 is opened on the pre-pressing seat 71 for swinging the swing pin 77, and the arc hole 711 takes the rotating shaft 76 as the center of the circle.

[0070] In this embodiment, the upper rod 95 is rotatably installed on the consolidation seat 91 via the rotating shaft 1 910, and the swing arm 72 is rotatably installed on the pre-pressing seat 71 via the rotating shaft 2 76. Therefore, in actual welding, as the consolidation mechanism 9 and the pre-pressing mechanism 7 move down to contact the surface of the workpiece 10, they can swing toward the welding head assembly 8 with the rotating shaft 1 910 and the rotating shaft 2 76 as the center of the circle, thereby effectively reducing the distance between the welding head assembly 8 during welding, which is particularly suitable for the case where the upper size of the welding head assembly 8 is larger, and helps to ensure the welding quality; the assembly of the swing pin 1 913 and the arc hole 1 912, and the assembly of the swing pin 2 77 and the arc hole 2 711 effectively limit the swing range of the consolidation mechanism 9 and the pre-pressing mechanism 7 toward the welding head assembly 8, forming a swing limit.

[0071] The consolidation mechanism 9 also includes a V-shaped block 97, one end of the V-shaped block 97 is rotatably mounted on the consolidation seat 91 via bolt 1 971, and the other end of the V-shaped block 97 is hung with an elastic member 98 via bolt 2 972, and the upper end of the elastic member 98 is mounted on the consolidation seat 91; the movable pin 99 is located on the inner side of the V-shaped structure of the V-shaped block 97.

[0072] The arrangement of the V-shaped block 97 and the elastic member 98 effectively ensures the fit between the bottom surface of the consolidation block 94 and the slope surface of the workpiece 10 , and can promote and maintain the movement and reset of the lower rod 96 relative to the long hole 914 .

[0073] The bottom surface of the moving block 92 and the top surface of the swinging block 93 are in a concave-convex structure and are matched with each other.

[0074] In this embodiment, the moving block 92 is equipped with the swing block 93 via the rotating member 920 and the concave-convex structure, so that the swing block 93 can have an appropriate amount of swing margin in the left and right directions relative to the moving block 92 with the rotating member 920 as the center, so as to fit the surface of the workpiece 10.

[0075] The consolidation block 94 is embedded in the bottom surface of the swing block 93, and a fastener is installed laterally through the swing block 93, and the inner end of the fastener abuts against the consolidation block 94. Figure 7 shown.

[0076] In this embodiment, the consolidation block 94 is made of brass material to ensure wear resistance.

[0077] The consolidation mechanism 9 achieves surface-to-surface contact and adhesion with the workpiece 10 over a relatively large area via the bottom surface of the consolidation block 94 , thereby effectively ensuring the consolidation pressure on the workpiece.

[0078] like Figure 8 As shown, a roller seat 75 is installed at the lower part of the swing arm 72 in the pre-pressing mechanism 7 via a second rotating member 73, and a pre-pressing roller 74 is rotatably installed on the roller seat 75, and the axial direction of the pre-pressing roller 74 is arranged along the Y axis.

[0079] In this embodiment, the swing arm 72 uses a rotating part 73 to install a roller seat 75, and the axial direction of the rotating part 73 is perpendicular to the axial direction of the rotating shaft 76. The rotating part 73 allows the roller seat 75 to have a certain rotation margin in the left and right directions relative to the swing arm 72 to adapt to the fit between the pre-pressure roller 74 and the surface of the workpiece 10 when the surface of the welding workpiece 10 is uneven.

[0080] In this embodiment, an elastic body, such as a torsion spring, can be installed on the rotating shaft 1 910 and the rotating shaft 2 76. When no force is applied, the movable block 92 can be restored to a preset position relative to the consolidation seat 91 through the elastic body, so that the swing arm 72 can be maintained at a preset angle relative to the pre-pressure seat 71. When force is applied, the elastic body can overcome the force of the elastic body and swing toward the welding head assembly 8.

[0081] Of course, corresponding stop structures can also be set on the rotating shaft 1 910 and the rotating shaft 2 76. When no force is applied, gravity can be used to make the moving block 92 swing down relative to the consolidation seat 91 and restore to the preset stop position, and the swing arm 72 swing down relative to the pre-pressure seat 71 and restore to the preset stop angle.

[0082] The welding head assembly 8 in this embodiment can be an existing standard product and matched with a standard welding machine to achieve welding. In practical applications, the shape of the welding head assembly 8 is usually large at the top and small at the bottom. In order to ensure that the welding head assembly 8 does not collide during the downward movement, the consolidation mechanism 9 and the pre-pressing mechanism 7 need to maintain a certain distance from the welding head assembly 8.

[0083] The welding method of the ultrasonic continuous welding equipment for workpieces with variable thickness in this embodiment includes the following steps.

[0084] First, the workpiece 10 is clamped on the workbench 2 .

[0085] Secondly, the welding head assembly 8 independently descends to the lowest end under the drive of the corresponding lifting mechanism, and the welding head assembly 8 contacts the workpiece 10 for positioning; at this time, the pre-pressing mechanism 7 and the consolidation mechanism 9 are both away from the welding head assembly 8 in the Y direction, such as Fig. 9 shown.

[0086] Then, the pre-pressing mechanism 7 and the consolidating mechanism 9 are driven downward by the corresponding lifting mechanisms. Fig.10 shown.

[0087] After the consolidation block 94 and the pre-pressing roller 74 contact the surface of the workpiece 10 respectively, they continue to move downward, causing the moving block 92 in the consolidation mechanism 9 to move toward the welding head assembly 8, and the swing arm 72 in the pre-pressing mechanism 7 to move toward the welding head assembly 8, so that the distance between the consolidation block 94 and the welding head assembly 8, and the distance between the pre-pressing roller 74 and the welding head assembly 8 respectively reach the preset smaller spacing, such as Fig.11 shown.

[0088] The welding head assembly 8 starts working and welding begins. Combined with the work of the Y-direction moving assembly 41, the back plate 6 drives the pre-pressing mechanism 7, the welding head assembly 8, and the consolidation mechanism 9 to move in the Y direction to perform continuous welding operations.

[0089] When the thickness of the workpiece 10 gradually increases upward or decreases downward in the welding direction, the consolidation block 94, the swing block 93, and the moving block 92 react to the lower rod 96, causing the end of the lower rod 96 to move along the long hole 914 through the moving pin 99, so that the bottom surface of the consolidation block 94 is adaptively tilted along the surface of the workpiece 10 and remains in contact with the workpiece 10. Fig.12 shown.

[0090] When the thickness of the workpiece 10 changes in the X direction perpendicular to the welding direction, the consolidation block 94 and the swing block 93 will be caused to deflect relative to the moving block 92 with the rotating member 920 as the axial direction, so that the consolidation block 94 is adaptively tilted along the surface of the workpiece 10 and remains in contact with the workpiece 10, such as Fig.13 shown.

[0091] The present invention effectively overcomes the distance problem while ensuring space for the welding head assembly to move up and down, greatly helps to ensure the welding quality of continuous welding, and is particularly suitable for situations where the upper size of the welding head is larger.

[0092] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0093] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. An ultrasonic continuous welding device for workpieces of variable thickness, characterized in that: The invention comprises a bed (1), a workbench (2) is installed in the middle of the top surface of the bed (1), and a workpiece (10) is clamped on the workbench (2); a pre-pressing mechanism (7), a welding head assembly (8), and a consolidation mechanism (9) are arranged in sequence above the workbench (2) along the Y direction, and the pre-pressing mechanism (7), the welding head assembly (8), and the consolidation mechanism (9) are respectively installed on the side of the back plate (6) via corresponding lifting mechanisms, and the pre-pressing mechanism (7), the welding head assembly (8), and the consolidation mechanism (9) move synchronously with the back plate (6) in the X direction, the Y direction, and the Z direction; The consolidation mechanism (9) comprises a consolidation seat (91) and a moving block (92) arranged up and down; an upper rod (95) and a lower rod (96) are rotatably mounted between the consolidation seat (91) and the moving block (92) to form a parallelogram structure inclined toward the welding head assembly (8); the lower rod (96) is slidably mounted in the long hole (914) of the consolidation seat (91) via a moving pin (99); the moving block (92) is mounted with a swing block (93) via a rotating member (920); a consolidation block (94) is mounted on the bottom surface of the swing block (93); the length direction of the long hole (914) and the axial direction of the rotating member (920) are both arranged along the Y-axis direction; The pre-pressing mechanism (7) comprises a pre-pressing seat (71), a swing arm (72) is rotatably mounted on the pre-pressing seat (71), the swing arm (72) is inclined toward the welding head assembly (8), and a pre-pressing roller (74) is mounted at the bottom end of the swing arm (72).

2. The ultrasonic continuous welding device for variable thickness workpieces according to claim 1, characterized in that: The bed (1) extends upwardly from opposite edges to form side walls (3); a crossbeam (4) is mounted on the side wall (3) via an X-direction moving assembly (31); a Y-direction moving seat (42) is mounted on the crossbeam (4) via a Y-direction moving assembly (41); a back plate (6) is mounted on the side of the Y-direction moving seat (42) via a lifting assembly (5); and a workbench (2) is mounted on the top surface of the bed (1) between the two side walls (3).

3. The ultrasonic continuous welding equipment for variable thickness workpieces according to claim 1, characterized in that: The welding head assembly (8) is installed on the side of the back plate (6) via the welding head lifting assembly (80); the pre-pressing mechanism (7) is installed on the side of the back plate (6) via the lifting drive assembly 1 (70); and the consolidation mechanism (9) is installed on the side of the back plate (6) via the lifting drive assembly 2 (90); the pre-pressing mechanism (7) is installed on the bottom end of the lifting drive assembly 1 (70) via a movable adjustment mechanism, and the consolidation mechanism (9) is installed on the bottom end of the lifting drive assembly 2 (90) via another set of movable adjustment mechanisms; the adjustment direction of the movable adjustment mechanism is along the Y direction.

4. The ultrasonic continuous welding device for variable thickness workpieces according to claim 3, characterized in that: The lifting drive assembly 1 (70) has the same structure as the lifting drive assembly 2 (90), and its structure is as follows: it includes a lifting guide assembly (901) vertically installed on the back plate (6), a sliding plate (903) is slidably installed on the lifting guide assembly (901), and a lifting seat (905) is installed at the bottom end of the sliding plate (903); it also includes a support (902) arranged across the sliding plate (903), a linear driving power (904) is installed on the support (902), and the output end of the linear driving power (904) is downward and connected to the lifting seat (905).

5. The ultrasonic continuous welding equipment for workpieces with variable thickness as claimed in claim 4, characterized in that: The bottom surface of the lifting seat (905) extends downward to form a T-shaped rib (906) arranged in the Y direction. The top surfaces of the consolidation seat (91) and the pre-pressing seat (71) are respectively provided with T-shaped slots (915) arranged along the Y direction. The T-shaped rib (906) is installed in the corresponding T-shaped slot (915) to form a movable adjustment mechanism. The threaded hole (911) passing through the consolidation seat (91) or the pre-pressing seat (71) laterally is locked with a top screw, and the inner end of the top screw abuts against the T-shaped rib (906).

6. The ultrasonic continuous welding equipment for workpieces with variable thickness as claimed in claim 1, characterized in that: The middle part of the upper rod (95) is rotatably mounted on the consolidation seat (91) via a rotating shaft (910), a swing pin (913) is mounted on the upper end of the upper rod (95), and an arc hole (912) is provided on the consolidation seat (91) for swinging the swing pin (913), and the arc hole (912) takes the rotating shaft (910) as the center of the circle; the middle part of the swing arm (72) is rotatably mounted on the pre-pressing seat (71) via a rotating shaft (76), a swing pin (77) is mounted on the upper end of the swing arm (72), and an arc hole (711) is provided on the pre-pressing seat (71) for swinging the swing pin (77), and the arc hole (711) takes the rotating shaft (76) as the center of the circle.

7. The ultrasonic continuous welding equipment for variable thickness workpieces according to claim 1, characterized in that: The consolidation mechanism (9) further comprises a V-shaped block (97), one end of the V-shaped block (97) being rotatably mounted on the consolidation seat (91) via a first bolt (971), the other end of the V-shaped block (97) being hung with an elastic member (98) via a second bolt (972), the upper end of the elastic member (98) being mounted on the consolidation seat (91); the movable pin (99) being located on the inner side of the V-shaped structure of the V-shaped block (97).

8. The ultrasonic continuous welding equipment for workpieces with variable thickness as claimed in claim 1, characterized in that: The bottom surface of the moving block (92) and the top surface of the swing block (93) are mutually matched in a concave-convex structure; the consolidation block (94) is embedded in the bottom surface of the swing block (93), and a fastener is locked and installed laterally through the swing block (93), and the inner end of the fastener abuts against the consolidation block (94).

9. The ultrasonic continuous welding equipment for workpieces with variable thickness as claimed in claim 1, characterized in that: A roller seat (75) is installed at the lower part of the swing arm (72) of the pre-pressing mechanism (7) via a second rotating member (73), and a pre-pressing roller (74) is rotatably installed on the roller seat (75), and the axial direction of the pre-pressing roller (74) is arranged along the Y axis.

10. A welding method for ultrasonic continuous welding equipment for workpieces of variable thickness as claimed in claim 1, characterized in that: The steps include: Clamping a workpiece (10) on a workbench (2); The welding head assembly (8) independently descends to the lowest end under the drive of the corresponding lifting mechanism, and the welding head assembly (8) contacts the workpiece (10) for positioning; at this time, the pre-pressing mechanism (7) and the consolidation mechanism (9) are away from the welding head assembly (8) in the Y direction; The pre-pressing mechanism (7) and the consolidating mechanism (9) are driven downward by the corresponding lifting mechanisms respectively; After the consolidation block (94) and the pre-pressing roller (74) respectively contact the surface of the workpiece (10), they continue to move downward, prompting the moving block (92) in the consolidation mechanism (9) to move toward the welding head assembly (8), and the swing arm (72) in the pre-pressing mechanism (7) to move toward the welding head assembly (8), so that the distance between the consolidation block (94) and the welding head assembly (8), and the distance between the pre-pressing roller (74) and the welding head assembly (8) respectively reach a preset smaller distance; When the thickness of the workpiece (10) gradually increases upward or decreases downward in the welding direction, the consolidation block (94), the swing block (93) and the moving block (92) react to the lower rod (96), causing the end of the lower rod (96) to move along the long hole (914) via the moving pin (99), so that the bottom surface of the consolidation block (94) is adaptively tilted along the surface of the workpiece (10) and remains in contact with the workpiece (10); When the thickness of the workpiece (10) changes in the X direction perpendicular to the welding direction, the consolidation block (94) and the swing block (93) will be caused to deflect relative to the moving block (92) with the rotating part (920) as the axis, so that the consolidation block (94) will tilt adaptively with the surface of the workpiece (10) and remain in contact with the workpiece (10).

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