Laser welding pressing tool based on cam

Abstract

The utility model relates to a laser welding pressing tool based on a cam, which is arranged on a conveying structure and comprises a fixing shaft, a fixing plate, a pressing plate and a cam lifting structure, and the fixing shaft is fixed on the conveying structure; the fixing plate is fixed on the fixing shaft, a cavity used for fixing a workpiece is formed in the fixing plate, the pressing plate is rotatably connected with the fixing plate and detachably covers the cavity, and the cam lifting structure is fixed on the pressing plate and located above the cavity; the cam lifting structure comprises a spring, a pressing rod, a flange and a cam handle, the flange is fixed on the pressing plate, a through hole matched with the pressing rod is formed in the pressing plate, one end of the pressing rod penetrates through the through hole, the other end of the pressing rod penetrates through the flange and is rotatably connected with the cam handle, and the spring is located between the pressing rod and the flange. Compared with the prior art, the device has the advantages of being simple in structure, convenient and fast to adjust, capable of effectively improving workpiece positioning and pressing efficiency and the like.

Description

Technical Field

[0001] The utility model relates to the field of laser welding equipment, in particular to a laser welding pressing tooling based on a cam. Background Art

[0002] The currently widely used laser welding technology brings great convenience to production due to its high efficiency and high automation. Laser welding is a non-contact welding method that does not require pressure during operation. However, to form a qualified molten pool and weld seam, it is still necessary for the materials to be welded to fit tightly without gaps, so a pressing device is required.

[0003] For the laser welding of two circular metal products, a mechanism similar to lathe machining is adopted. It mainly consists of a rotatable three-jaw chuck, a special tooling, a guide rail, and a tailstock, with a relatively large volume. This kind of tooling similar to lathe structure can meet the laser welding requirements of ordinary specifications. However, it has many inconveniences for laser welding with special requirements, such as low efficiency and large volume.

[0004] For some welding with special requirements, it is necessary to customize special welding equipment to ensure the environmental requirements during product welding, such as humidity, temperature, etc. The laser welding equipment needs to be placed in a sealed enclosure, and the operator performs internal operations through rubber gloves on the sealed enclosure: loading and fixing the tooling; loading, centering, screwing out the tailstock to press, welding, unscrewing the tailstock to release, and taking out the product, etc. In this kind of sealed laser welding equipment, it is necessary to evacuate and fill with protective gas to meet the welding environmental requirements.

[0005] This kind of welding operation through rubber gloves on the equipment, especially the operations of loading and fixing the tooling for relatively small products, and loading, centering, screwing out the tailstock to press, welding, unscrewing the tailstock to release, and taking out the product, etc. are very difficult. Because the rubber gloves need to withstand a certain pressure, they are relatively thick, with poor hand feeling after wearing, and it is difficult to accurately execute the actions. The working efficiency is relatively low.

[0006] In summary, for the existing laser welding pressing tooling when pressing workpieces with special environmental requirements, the structure is relatively complex, the workpiece installation is cumbersome and the operation is inconvenient, the working efficiency is low, resulting in a long preparation time before welding, low positioning and pressing accuracy, and low overall welding efficiency. Summary of the Utility Model

[0007] The purpose of the present utility model is to provide a laser welding pressing tooling based on a cam to overcome the defects of the existing welding tooling for workpieces with special environmental requirements, such as complex structure, inconvenient operation, and low welding production efficiency.

[0008] The purpose of the present utility model can be achieved by the following technical solutions:

[0009] A cam-based laser welding pressing tooling is arranged on a conveying structure. The tooling includes a fixed shaft, a fixing plate, a pressing plate and a cam lifting structure. The fixed shaft is fixed on the conveying structure;

[0010] The fixing plate is fixed on the fixed shaft. A cavity for fixing a workpiece is arranged on the fixing plate. The pressing plate is rotatably connected to the fixing plate and detachably covers the cavity. The cam lifting structure is fixed on the pressing plate and is located above the cavity;

[0011] The cam lifting structure includes a spring, a pressing rod, a flange and a cam handle. The flange is fixed on the pressing plate. A through hole matched with the pressing rod is arranged on the pressing plate. One end of the pressing rod passes through the through hole, and the other end passes through the flange and is rotatably connected to the cam handle. The spring is located between the pressing rod and the flange.

[0012] Preferably, the pressing rod includes a pressing head and a connecting section. One end of the connecting section is connected to the pressing head, and the other end is rotatably connected to the cam handle. The diameter of the pressing head is larger than that of the connecting section, and the pressing head and the connecting section are coaxially arranged.

[0013] Preferably, an auxiliary pressing groove is arranged at one end of the pressing head close to the cavity, and the shape of the auxiliary pressing groove corresponds to that of the cavity.

[0014] Preferably, the flange is of a T-shaped structure. A pressing head cavity and a spring cavity are arranged on one side of the flange close to the pressing plate. One side of the spring cavity communicates with the pressing head cavity, and the other side communicates with the through hole. The shape of the pressing head cavity matches that of the pressing head, and the shape of the spring cavity matches that of the spring. One end of the spring contacts the bottom of the spring cavity, and the other end contacts the pressing head.

[0015] Preferably, a spring clamping groove is arranged at one end of the pressing head close to the spring. The spring clamping groove is coaxially arranged with the connecting section. The spring is sleeved on the connecting section, and one end is located in the spring clamping groove.

[0016] Preferably, the cam handle includes a handle section and a cam section. The cam section includes a straight side and an arc side;

[0017] The handle section is fixed on one side of the cam section. The cam section is rotatably connected to the connecting section and is in contact with the top of the flange. The distance from the rotation center of the cam section to the straight side is less than the maximum distance from the rotation center to the arc side.

[0018] Preferably, a U-shaped groove is arranged on one side of the cam section away from the handle section. Corresponding bolt holes are arranged on both sides of the U-shaped groove and on the connecting section. The connecting section is located in the U-shaped groove and is connected to the cam section through bolts.

[0019] Preferably, the spring is a compression spring.

[0020] Preferably, a first magnet is provided on the fixed plate, and a second magnet that attracts each other is provided at a corresponding position on the side of the pressing plate close to the fixed plate.

[0021] Preferably, the fixed shaft includes a fixed section, a positioning step, and a clamping section that are connected in sequence; the fixed section is fixed to the lower end of the fixed plate, the clamping section is fixed to the conveying structure, and the lower end of the positioning step abuts against the conveying structure.

[0022] Compared with the prior art, the utility model has the following advantages:

[0023] (1) In this solution, the workpiece to be welded is placed in the cavity of the fixed plate, the pressing plate is rotated to cover the fixed plate, and then the cam handle is rotated. The pressing rod moves downward under the action of the spring, and the lower end of the pressing rod abuts against the workpiece to tightly fix the workpiece; after welding is completed, the cam handle is rotated to drive the pressing rod to move upward, the lower end of the pressing rod moves away from the workpiece, and the pressing plate is rotated to open the fixed plate, and the welded workpiece can be taken out of the cavity.

[0024] The cavity provided on the fixed plate is used to place the workpiece, and the pressing plate that can be detachably covered on the fixed plate is used to fix the workpiece in the cavity. Then the cam handle is rotated, and the pressing head above the cavity abuts against the workpiece under the action of the spring to press the workpiece. Rotating the cam handle again can lift the pressing rod and release the workpiece. The pressing tooling structure is simple. The operator only needs to operate the pressing plate and the cam handle to fix and press the workpiece in the cavity, which is convenient and fast. While reducing the operation difficulty, it improves the accuracy of workpiece placement, thereby effectively improving the welding efficiency of workpieces with special requirements.

[0025] (2) In this solution, the cam section of the cam handle is eccentrically connected to the pressing rod, and the distance from the rotation center to the straight side is less than the maximum distance from the rotation center to the arc side. By rotating the cam handle, the straight side and the arc side of the cam section alternately contact the flange to realize the pressing or releasing of the pressing head on the workpiece; when the straight side of the cam handle contacts the flange, the pressing head presses the workpiece, and when the arc side contacts the flange, the pressing head releases the product. The pressing tooling is convenient and fast, effectively improving the workpiece installation efficiency, especially obvious in laser welding operations through rubber gloves in a sealed cover. By cooperating the cam pressing tooling with a three-jaw chuck controlled by a servo motor, the welding process can be completed, effectively reducing the space occupied by the non-welding process of the workpiece, and improving the positioning and installation efficiency of the product and the production efficiency of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of the cam-based laser welding pressing tooling provided by the utility model;

[0027] Figure 2Schematic top view structure diagram of the laser welding pressing tool based on a cam provided by the present utility model;

[0028] Figure 3 is Figure 2 the A-A cross-sectional view in

[0029] Figure 4 Schematic structure diagram of the pressing tool head of the pressing tool provided by the present utility model when it is loosened;

[0030] Figure 5 Schematic structure diagram of the pressing tool head of the pressing tool provided by the present utility model when it is pressed;

[0031] In the figure: 1. Fixed shaft, 2. Fixed plate, 3. Pressing plate, 4. Spring, 5. Pressing rod, 6. Flange, 7. Cam handle; 11. Fixed section, 12. Positioning step, 13. Clamping section; 21. Cavity, 22. First magnet, 23. Second magnet; 51. Pressing head, 52. Connection section, 53. Auxiliary pressing groove, 54. Spring card slot; 61. Pressing head cavity, 62. Spring cavity; 71. Handle section, 72. Cam section, 73. Straight side, 74. Arc side. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the protection scope of the present utility model.

[0034] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0035] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0036] It should be noted that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0037] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0038] Embodiment 1

[0039] As Figures 1 to 3 shown, this embodiment provides a cam-based laser welding pressing tooling, which is arranged on a conveying structure. The tooling includes a fixed shaft 1, a fixing plate 2, a pressing plate 3, and a cam lifting structure. The fixed shaft 1 is fixed on the conveying structure;

[0040] The fixing plate 2 is fixed on the fixed shaft 1. A cavity 21 for fixing a workpiece is provided on the fixing plate 2. The pressing plate 3 is rotatably connected to the fixing plate 2 and detachably covers the cavity 21. The cam lifting structure is fixed on the pressing plate 3 and is located above the cavity 21;

[0041] The cam lifting structure includes a spring 4, a pressing rod 5, a flange 6, and a cam handle 7. The flange 6 is fixed on the pressing plate 3. A through hole matching the pressing rod 5 is provided on the pressing plate 3. One end of the pressing rod 5 passes through the through hole, and the other end passes through the flange 6 and is rotatably connected to the cam handle 7. The spring 4 is located between the pressing rod 5 and the flange 6.

[0042] Working principle: Place the workpiece to be welded into the cavity 21 of the fixed plate 2, rotate the pressure plate 3 to cover the upper part of the fixed plate 2, and then rotate the cam handle 7. The pressure rod 5 moves downward under the action of the spring 4, and the lower end of the pressure rod 5 abuts against the workpiece to tightly fix the workpiece. After welding is completed, rotate the cam handle 7 to drive the pressure rod 5 to move upward, the lower end of the pressure rod 5 moves away from the workpiece, and rotate the pressure plate 3 to open the fixed plate 2, and take out the welded workpiece from the cavity 21.

[0043] The cavity 21 provided on the fixed plate 2 is used to place the workpiece. The pressure plate 3 that can be detachably covered on the fixed plate 2 is used to fix the workpiece in the cavity 21. Then rotate the cam handle 7, and the pressure head 5 above the cavity 21 abuts against the workpiece under the action of the spring 4 to tightly press the workpiece. Rotate the cam handle 7 again to lift the pressure rod 5 and release the workpiece. The pressing tooling has a simple structure. The operator only needs to operate the pressure plate 3 and the cam handle 7 to fix and press the workpiece in the cavity 21. The operation is convenient and fast, reducing the operation difficulty and improving the accuracy of workpiece placement, thus effectively improving the welding efficiency of workpieces with special requirements.

[0044] Preferred implementation method, as Figure 3 shown, the pressure rod 5 includes a pressure head 51 and a connecting section 52. One end of the connecting section 52 is connected to the pressure head 51, and the other end is rotatably connected to the cam handle 7. The diameter of the pressure head 51 is larger than that of the connecting section 52, and the pressure head 51 and the connecting section 52 are coaxially arranged.

[0045] Among them, an auxiliary pressure groove 53 is provided at one end of the pressure head 51 close to the cavity 21, and the shape of the auxiliary pressure groove 53 corresponds to that of the cavity 21. A spring clamping groove 54 is provided at one end of the pressure head 51 close to the spring 4. The spring clamping groove 54 is coaxially arranged with the connecting section 52. The spring 4 is sleeved on the connecting section 52, and one end is located in the spring clamping groove 54. The spring 4 is a compression spring.

[0046] The up and down movement of the pressure rod 5 is adjusted by the cam handle 7 in cooperation with the spring 4. When the pressure rod 5 moves downward to press tightly, the auxiliary pressure groove 53 on the pressure head 51 is used to assist in positioning the workpiece to ensure the stability of the contact between the pressure head 51 and the workpiece. And a spring clamping groove 54 is provided at the upper end of the pressure head 51, and one end of the spring 4 is arranged in the spring clamping groove 54 to ensure the reliability of the connection between the spring 4 and the pressure rod 5, and the force on the pressure head 51 is uniform, and a force can be evenly applied to the circumference of the spherical workpiece. And using a compression spring ensures that the pressure rod is always under force, further ensuring the stability and reliability of the connection of the cam lifting structure.

[0047] Specifically, the flange 6 has a T-shaped structure. On the side of the flange 6 close to the pressing plate 3, there are a pressing head cavity 61 and a spring cavity 62. One side of the spring cavity 62 communicates with the pressing head cavity 61, and the other side communicates with the through hole. The shape of the pressing head cavity 61 matches that of the pressing head 51, and the shape of the spring cavity 62 matches that of the spring 4. One end of the spring 4 contacts the bottom of the spring cavity 62, and the other end contacts the pressing head 51.

[0048] Preferred embodiments, such as Figure 4 and Figure 5 As shown, the cam handle 7 includes a handle section 71 and a cam section 72. The cam section 72 includes a straight side 73 and an arc side 74;

[0049] The handle section 71 is fixed on one side of the cam section 72. The cam section 72 is rotatably connected to the connecting section 52 and is in contact with the top of the flange 6. The distance from the rotation center of the cam section 72 to the straight side 73 is less than the maximum distance from the rotation center to the arc side 74.

[0050] Wherein, on the side of the cam section 72 away from the handle section 71, there is a U-shaped groove. Corresponding bolt holes are provided on both sides of the U-shaped groove and on the connecting section 52. The connecting section 52 is located in the U-shaped groove and is connected to the cam section 72 by bolts.

[0051] The cam section of the cam handle is eccentrically connected to the pressure bar, and the distance from the rotation center to the straight side is less than the maximum distance from the rotation center to the arc side. By rotating the cam handle, the straight side and the arc side of the cam section alternately contact the flange, realizing the clamping or loosening of the workpiece by the pressing head; when the straight side of the cam handle contacts the flange, the pressing head clamps the workpiece, and when the arc side contacts the flange, the pressing head loosens the product. The clamping tooling is convenient and fast to operate, effectively improving the installation efficiency of the workpiece, especially in laser welding operations through rubber gloves in a sealed cover. By cooperating the cam clamping tooling with a three-jaw chuck controlled by a servo motor, the welding process can be completed, effectively reducing the space occupied by the non-welding process of the workpiece, improving the positioning and installation efficiency of the product and the production efficiency of the workpiece.

[0052] Optionally, a first magnet 22 is provided on the fixing plate 2, and a second magnet 23 that attracts each other is provided at the corresponding position on the side of the pressing plate 3 close to the fixing plate 2.

[0053] The first magnet 22 and the second magnet 23 provided correspondingly on the pressing plate 3 and the fixing plate 3 are attracted to each other, which can completely fix the part of the product other than the part to be welded, ensuring the safety and qualification rate during product welding. Moreover, different springs and magnets with different magnetic forces can be selected according to the different pressure requirements of the workpiece, further expanding the application range of the tooling.

[0054] Specifically, the fixed shaft 1 includes a fixed section 11, a positioning step 12, and a clamping section 13 that are connected in sequence; the fixed section 11 is fixed to the lower end of the fixed plate 2, the clamping section 13 is fixed to the conveying structure, and the lower end of the positioning step 12 abuts against the conveying structure.

[0055] Wherein, the pressing plate 3 is hinged to one side of the fixed plate 2 through a pin, enabling the pressing plate 3 to be folded by 180 degrees. After the two magnets on the pressing plate 3 and the fixed plate 2 are separated, the pressing plate 3 is flipped to one side of the fixed plate 2. Then, when installing the workpiece, the pressing plate 3 can be rotated to make the magnet on it adsorb to the magnet on the fixed plate 2 to complete the fixation, which is convenient to operate and improves the installation efficiency.

[0056] The pressing tooling with a cam mechanism can cooperate with a three-jaw chuck controlled by a servo motor to complete the fixation and pressing of the product and finish the welding. Compared with the existing pressing mechanism, the guide rail and the tailstock in the mechanism are omitted, which can reduce the volume increased due to the whole mechanism. Moreover, the pressing tooling of the cam mechanism can effectively replace the tailstock to fix and press the product to complete the subsequent welding process. Using the cam principle, magnetic force, and elastic force to press and release the product is faster and more efficient than the original method of adjusting the telescopic pressing and releasing of the tailstock by turning the handwheel, and it can ensure the stable and reliable structure.

[0057] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field according to the concept of the present invention through logical analysis, reasoning, or limited experiments on the basis of the prior art shall fall within the protection scope determined by the claims.

Claims

1. A cam-based laser welding pressing tooling, which is arranged on a conveying structure, is characterized in that The tooling includes a fixed shaft (1), a fixed plate (2), a pressing plate (3) and a cam lifting structure. The fixed shaft (1) is fixed on the conveying structure; The fixed plate (2) is fixed on the fixed shaft (1). The fixed plate (2) is provided with a cavity (21) for fixing the workpiece. The pressing plate (3) is rotatably connected to the fixed plate (2) and detachably covers the cavity (21). The cam lifting structure is fixed on the pressing plate (3) and is located above the cavity (21); The cam lifting structure includes a spring (4), a pressure rod (5), a flange (6) and a cam handle (7). The flange (6) is fixed on the pressing plate (3). The pressing plate (3) is provided with a through hole that cooperates with the pressure rod (5). One end of the pressure rod (5) passes through the through hole, and the other end passes through the flange (6) and is rotatably connected to the cam handle (7). The spring (4) is located between the pressure rod (5) and the flange (6).

2. The cam-based laser welding pressing tooling according to claim 1, wherein The pressure rod (5) includes a pressure head (51) and a connecting section (52). One end of the connecting section (52) is connected to the pressure head (51), and the other end is rotatably connected to the cam handle (7). The diameter of the pressure head (51) is larger than that of the connecting section (52). The pressure head (51) and the connecting section (52) are coaxially arranged.

3. The cam-based laser welding pressing tooling according to claim 2, wherein, An auxiliary pressing groove (53) is provided at one end of the pressure head (51) close to the cavity (21). The shape of the auxiliary pressing groove (53) corresponds to that of the cavity (21).

4. The laser welding pressing tooling based on a cam according to claim 2, wherein The flange (6) is of a T-shaped structure. A pressure head cavity (61) and a spring cavity (62) are provided on one side of the flange (6) close to the pressing plate (3). One side of the spring cavity (62) communicates with the pressure head cavity (61), and the other side communicates with the through hole. The shape of the pressure head cavity (61) cooperates with that of the pressure head (51). The shape of the spring cavity (62) cooperates with that of the spring (4). One end of the spring (4) contacts the bottom of the spring cavity (62), and the other end contacts the pressure head (51).

5. The laser welding pressing tooling based on a cam according to claim 2, wherein A spring clamping groove (54) is provided at one end of the pressure head (51) close to the spring (4). The spring clamping groove (54) is coaxially arranged with the connecting section (52). The spring (4) is sleeved on the connecting section (52), and one end is located in the spring clamping groove (54).

6. The cam-based laser welding pressing tooling according to claim 1, wherein, The cam handle (7) includes a handle section (71) and a cam section (72). The cam section (72) includes a straight side (73) and an arc side (74); The handle section (71) is fixed on one side of the cam section (72). The cam section (72) is rotatably connected to the connecting section (52) and is in contact with the top of the flange (6). The distance from the rotation center of the cam section (72) to the straight side (73) is less than the maximum distance from the rotation center to the arc side (74).

7. A cam-based laser welding pressing tooling according to claim 6, characterized in that, A U-shaped groove is provided on one side of the cam section (72) away from the handle section (71). Corresponding bolt holes are provided on both sides of the U-shaped groove and on the connecting section (52). The connecting section (52) is located in the U-shaped groove and is connected to the cam section (72) by bolts.

8. A cam-based laser welding pressing tooling according to claim 1, wherein, The spring (4) is a compression spring.

9. The laser welding pressing tooling based on a cam according to claim 1, characterized in that, A first magnet (22) is provided on the fixed plate (2), and a second magnet (23) that attracts each other is provided at a position corresponding to the first magnet (22) on the side of the pressing plate (3) close to the fixed plate (2).

10. A cam-based laser welding pressing tooling according to claim 1, characterized in that, The fixed shaft (1) includes a fixed section (11), a positioning step (12), and a clamping section (13) connected in sequence; the fixed section (11) is fixed to the lower end of the fixed plate (2), the clamping section (13) is fixed to the conveying structure, and the lower end of the positioning step (12) abuts against the conveying structure.

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