Automatic fixing device for pin shaft welding

Abstract

The utility model relates to an automatic fixing device for pin shaft welding. The lifting device is arranged on the rack; the lower clamping devices are arranged on the lifting device and used for clamping one ends of the connecting shafts; the upper clamping devices are arranged at the top of the rack, are used for clamping the other ends of the connecting shafts and are arranged opposite to the lower clamping devices; the positioning devices are arranged at the top of the rack and used for positioning the connecting plates; the upper pressing devices are arranged at the top of the rack and located above the positioning device and the upper clamping devices; and the pressing plates are arranged on the upper pressing device and used for pressing the connecting plate to the top of the connecting shaft, and welding grooves opposite to the top of the connecting shaft are formed in the pressing plates. The device can be suitable for pin shafts of various specifications by replacing different pressing plates, the types and the number of clamps are greatly reduced, universality is improved, cost is reduced, use is convenient, clamping is reliable, and efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a pin shaft welding device, in particular to an automatic pin shaft welding fixing device. Background Art

[0002] like Fig.12 As shown, the pin shaft includes a connecting shaft and a connecting plate welded on the top of the connecting shaft. The top of the connecting shaft is a stepped shaft. A connecting hole is provided on the connecting plate. The connecting hole is inserted into the top of the connecting shaft and rests on the shaft shoulder at the top of the connecting shaft. Then the connecting plate is welded to the connecting shaft. The diameter of the connecting shaft is between 25 and 80 mm. The length of the connecting shaft and the connecting plate at the top also change according to the diameter or requirements. Each specification of the pin shaft requires a welding fixture. Therefore, there are many types of existing fixtures, which are inconvenient to use. In addition, a complete set of fixtures needs to be added for each additional specification, resulting in high costs. Utility Model Content

[0003] In order to solve the above problems of inconvenient use and high cost, the utility model provides an automatic fixing device for pin welding, and the specific technical solution is as follows:

[0004] A pin shaft welding automatic fixing device comprises: a frame; a lifting device, which is arranged on the frame; a plurality of lower clamping devices, which are arranged on the lifting device and are used to clamp one end of the connecting shaft; a plurality of upper clamping devices, which are arranged at the top of the frame and are used to clamp the other end of the connecting shaft and are arranged opposite to the lower clamping device; a plurality of positioning devices, which are arranged at the top of the frame and are used to position the connecting plate; a plurality of upper pressing devices, which are arranged at the top of the frame and are located above the positioning device and the upper clamping devices; and a plurality of pressing plates, which are arranged on the upper pressing devices and are used to press the connecting plate against the top of the connecting shaft, and the pressing plates are provided with welding grooves which are arranged opposite to the top of the connecting shaft; wherein the lower clamping devices, the upper clamping devices, the positioning devices, the upper pressing devices and the pressing plates correspond to each other one by one.

[0005] Preferably, the lower clamping device includes: a lower clamping cylinder, which is arranged on the lifting device; a lower clamping block, which is arranged on the lower clamping cylinder and has a lower clamping groove; and two lower clamping rollers, which are symmetrically arranged on the lifting device and are arranged opposite to the lower clamping groove.

[0006] Furthermore, it also includes: a lower clamping base plate, which is arranged on the lifting device; and two lower clamping shafts, which are symmetrically arranged on the lower clamping base plate and connected to the lower clamping rollers.

[0007] Preferably, the upper clamping device includes: an upper clamping cylinder, which is arranged on the top of the frame; an upper clamping block, which is arranged on the upper clamping cylinder and is provided with an upper clamping groove; an upper clamping base plate, which is arranged on the top of the frame; two upper clamping shafts, which are symmetrically arranged on the upper clamping base plate and are arranged opposite to the upper clamping groove; and a plurality of upper clamping rollers, which are arranged on the upper clamping shafts.

[0008] Preferably, the positioning device includes: a lower positioning plate, arranged on the frame; an elastic device, arranged on the lower positioning plate; a positioning seat, arranged on the elastic device; and two positioning magnets, symmetrically arranged on the positioning seat, for adsorbing the connecting plate.

[0009] Furthermore, the elastic device includes: an elastic shaft, which is arranged on the lower positioning plate; a spring, which is movably arranged on the elastic shaft; and an upper positioning plate, which is movably arranged on the elastic shaft and connected to the spring.

[0010] Wherein, the lower positioning plate is provided with a lower positioning block; the frame is provided with a lower positioning groove, and the lower positioning block is slidably inserted into the lower positioning groove.

[0011] Preferably, the upper clamping device includes: an upper clamping cylinder, which is arranged on the top of the frame; a plurality of guide shafts, which are arranged on the top of the frame; an upper pressure plate, which is movably arranged on the guide shaft and connected to the upper clamping cylinder, the pressure plate is arranged on the upper pressure plate, and the upper pressure plate is provided with a welding hole which is communicated with the welding groove.

[0012] Furthermore, the upper pressing plate is provided with a mounting groove, the pressing plate is provided with a pressing block, and the pressing block is inserted into the mounting groove.

[0013] Preferably, a plurality of insertion slots are provided on the top of the frame, and the upper clamping device, the positioning device and the upper pressing device are all provided with side surfaces of the insertion slots.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model provides an automatic pin shaft welding fixing device which can be suitable for pin shafts of various specifications by replacing different clamping plates, which greatly reduces the types and quantities of clamps, improves versatility, reduces costs, is easy to use, has reliable clamping, and improves efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of this application;

[0017] Figure 2 is a front view of the present application;

[0018] Figure 3is a top view of the present application;

[0019] Figure 4 is a schematic diagram of the structure of the lower clamping device;

[0020] Figure 5 It is an assembly diagram of an upper clamping device, a positioning device and an upper pressing device;

[0021] Figure 6 yes Figure 5 A front view of

[0022] Figure 7 yes Figure 6 A top view of

[0023] Figure 8 is a schematic diagram of the structure of the positioning device;

[0024] Fig. 9 is a front view of the positioning device;

[0025] Fig.10 It is a structural schematic diagram of the upper pressing plate;

[0026] Fig.11 It is a structural schematic diagram of a pressing plate;

[0027] Fig.12 It is a schematic diagram of the structure of the pin shaft. DETAILED DESCRIPTION

[0028] The utility model is now further described with reference to the accompanying drawings.

[0029] like Figures 1 to 11 As shown, an automatic fixing device for pin shaft welding includes a frame 1, a lifting device, a lower clamping device 3, an upper clamping device 5, a positioning device 6, an upper clamping device 7 and a clamping plate 8. The lifting device is installed inside the frame 1, and the lower clamping device 3 is installed on the lifting device to follow the lifting device to rise and fall, so as to be suitable for pin shafts of different lengths. The lower clamping device 3 is used to clamp one end of the connecting shaft 91; the upper clamping device 5 is installed on the top of the frame 1 to clamp the other end of the connecting shaft 91. The upper clamping device 5 is located at the lower clamping device. The upper clamping device 5 is mounted on the frame 1 and is located above the positioning device 6 and the upper clamping device 5. The clamping plate 8 is detachably mounted on the upper clamping device 7, and the clamping plate 8 is used to clamp the connecting plate 92 on the top of the connecting shaft 91. The clamping plate 8 is provided with a welding groove 81 arranged opposite to the top of the connecting shaft 91. The lower clamping device 3, the upper clamping device 5, the positioning device 6, the upper clamping device 7 and the clamping plate 8 correspond to each other. There are three of each of the lower clamping device 3, the upper clamping device 5, the positioning device 6, the upper clamping device 7 and the clamping plate 8.

[0030] The clamping plate 8 is replaced according to different pin shafts. Replacing the clamping plate 8 as a whole can adapt to different types of pin shafts, which improves versatility and greatly reduces the types of clamps. At the same time, clamping multiple pin shafts can greatly reduce the number of clamps, improve welding efficiency, and reduce the cost of the clamp.

[0031] Specifically, the frame 1 includes a base 12, a column 11 and a top plate 13. The columns 11 are symmetrically fixed on both sides of the base 12, and the top plate 13 is fixed on the top of the columns 11. Three insertion slots 14 are arranged in an array on the top plate 13. The insertion slots 14 are also located on one side of the top plate 13. The insertion slots 14 are open slots for easy installation and removal of the connecting shaft 91.

[0032] The lifting device includes a lifting linear module 21 and a lifting plate 22. The lifting linear module 21 is symmetrically mounted on two columns 11, and the lifting plate 22 is mounted on the slide of the lifting linear module 21. The lifting linear module 21 is used to adjust the height of the lifting plate 22, so that the lifting device is compatible with pins with a length of 200 to 800 mm.

[0033] The lower clamping device 3 includes a lower clamping cylinder 34, a lower clamping block 35, a lower clamping roller 33, a lower clamping base plate 31 and a lower clamping shaft 32. The lower clamping cylinder 34 is fixed on the lifting plate 22 and connected to the lower clamping block 35. The lower clamping block 35 is provided with a lower clamping groove 351, and the lower clamping groove 351 is a V-shaped groove. The lower clamping cylinder 34 is a double-axis cylinder. The lower clamping roller 33 is installed on the lower clamping base plate 31 through the lower clamping shaft 32, and two lower clamping shafts 32 are symmetrically provided. Two lower clamping rollers 33 are provided, which are respectively fixed on the two lower clamping shafts 32. The lower clamping rollers 33 are symmetrically located on both sides of the lower clamping groove 351. The lower clamping cylinder 34 pushes the lower clamping block 35 to move toward the lower clamping roller 33, and the lower clamping groove 351 presses the connecting shaft 91 onto the lower clamping roller 33 to achieve bottom fixation of the connecting shaft 91. The two lower clamping rollers 33 and one lower clamping groove 351 achieve four-point positioning to complete the precise positioning of the connecting shaft 91. The lower clamping base plate 31 facilitates the installation and maintenance of the lower clamping shaft 32 and the lower clamping roller 33.

[0034] The upper clamping device 5 includes an upper clamping cylinder 51, an upper clamping block 52, an upper clamping base plate 55, an upper clamping shaft 56 and an upper clamping roller 58. The upper clamping cylinder 51 is a double-axis cylinder. The upper clamping cylinder 51 is installed on the top plate 13 and is located on one side of the insertion groove 14. The upper clamping block 52 is installed on the upper clamping cylinder 51 and is provided with a V-shaped upper clamping groove 521; the upper clamping base plate 55 is installed on the top plate 13 and is located on the other side of the insertion groove 14; two upper clamping shafts 56 are provided and are symmetrically fixed on the upper clamping base plate 55. The upper clamping roller 58 is installed on the upper clamping shaft 56. One, two or more upper clamping rollers 58 can be provided. Multiple upper clamping rollers 58 are arranged along the axis of the upper clamping shaft 56. Multiple upper clamping rollers 58 can improve the stability of clamping. The upper clamping roller 58 is arranged opposite to the upper clamping groove 521 and is used for clamping the top of the connecting shaft 91 .

[0035] The positioning device 6 includes a lower positioning plate 62, an elastic device, a positioning seat 66 and a positioning magnet 67. The elastic device includes an elastic shaft 63, a spring 64 and an upper positioning plate 65. One end of the elastic shaft 63 is fixed on the lower positioning plate 62, and the other end is slidably connected to the upper positioning plate 65 through a linear bearing. Two elastic shafts 63 are symmetrically provided and are located at both ends of the upper positioning plate 65. The spring 64 is movably inserted on the elastic shaft 63, and the two ends of the spring 64 are respectively against the lower positioning plate 62 and the upper positioning plate 65. The positioning seat 66 is fixed at the center of the top of the upper positioning plate 65. Two positioning magnets 67 are provided and symmetrically fixed on the top of the positioning seat 66. The positioning magnets 67 are used to adsorb the connecting plate 92. A lower positioning block 621 is provided on the lower positioning plate 62, and the lower positioning block 621 is slidably inserted in the lower positioning groove 551. The lower positioning grooves 551 are symmetrically arranged at both ends of the upper clamping base plate 55. The lower positioning plate 62 is fixed to the lower positioning groove 551 by screws. The lower positioning block 621 and the lower positioning groove 551 are used to adjust the position of the positioning device 6, which is convenient for adjustment according to different lengths of the connecting plate 92 and convenient for fixing the connecting plate 92.

[0036] The upper clamping device 7 includes an upper clamping cylinder 72, a guide shaft 73, and an upper pressing plate 71. The upper clamping cylinder 72 is fixed on the top plate 13 and is located on both sides of the insertion groove 14. The upper clamping cylinder 72 is connected to both ends of the upper pressing plate 71. Two guide shafts 73 are provided, which are respectively located on one side of the two upper clamping cylinders 72. The guide shaft 73 is slidably connected to the upper pressing plate 71 through a linear bearing. The upper pressing plate 71 is provided with a welding hole 711 and a mounting groove 712 communicating with the welding hole 711. The clamping plate 8 is provided with a clamping block 82, which is inserted into the mounting groove 712 and is used to locate the position of the clamping plate 8 to facilitate the installation of the clamping plate 8.

[0037] During operation, first adjust the position of the lifting plate 22 through the lifting linear module 21 according to the height of the connecting shaft 91, then install the corresponding clamping plate 8 on the upper pressure plate 71 according to the connecting plate 92, and then place the connecting shaft 91 on the upper clamping device 5 and the lower clamping device 3, and then start the upper clamping cylinder 51 and the lower clamping cylinder 34 to fix the connecting shaft 91, and then insert the connecting hole of the connecting plate 92 into the top of the connecting shaft 91, and the other end of the connecting plate 92 is adsorbed by the positioning magnet 67, and then start the upper clamping cylinder 72, and the upper clamping cylinder 72 drives the upper pressure plate 71 and the clamping plate 8 to descend, and presses the connecting plate 92 on the top of the connecting shaft 91, and the robotic arm drives the welding gun to weld the connecting plate 92 and the connecting shaft 91. After welding is completed, the upper clamping cylinder 72 rises, and the clamping plate 8 moves away from the connecting plate 92. Then the upper clamping cylinder 51 and the lower clamping cylinder 34 release the connecting shaft 91, remove the welded pin shaft, and reinstall the connecting shaft 91 and the connecting plate 92 to be welded.

[0038] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the claims of the present invention.

Claims

1. An automatic fixing device for pin welding, characterized in that: include: Rack (1); A lifting device, arranged on the frame (1); A plurality of lower clamping devices (3) are arranged on the lifting device and are used to clamp one end of the connecting shaft (91); A plurality of upper clamping devices (5) are arranged on the top of the frame (1), used for clamping the other end of the connecting shaft (91), and are arranged opposite to the lower clamping device (3); A plurality of positioning devices (6) are arranged on the top of the frame (1) and are used to position the connecting plate (92); A plurality of upper clamping devices (7) are arranged on the top of the frame (1) and are located above the positioning device (6) and the upper clamping device (5); as well as A plurality of pressing plates (8) are arranged on the upper pressing device (7) and are used to press the connecting plate (92) against the top of the connecting shaft (91); the pressing plates (8) are provided with welding grooves (81) arranged opposite to the top of the connecting shaft (91); Wherein, the lower clamping device (3), the upper clamping device (5), the positioning device (6), the upper pressing device (7) and the pressing plate (8) correspond to each other one by one.

2. The automatic fixing device for pin welding according to claim 1, characterized in that: The lower clamping device (3) comprises: A lower clamping cylinder (34) is arranged on the lifting device; A lower clamping block (35) is disposed on the lower clamping cylinder (34) and is provided with a lower clamping groove (351); and Two lower clamping rollers (33) are symmetrically arranged on the lifting device and are arranged opposite to the lower clamping groove (351).

3. The automatic pin welding fixing device according to claim 2 is characterized in that: Also includes: A lower clamping base plate (31) is arranged on the lifting device; as well as Two lower clamping shafts (32) are symmetrically arranged on the lower clamping base plate (31) and connected to the lower clamping roller (33).

4. The automatic pin welding fixing device according to claim 1, characterized in that: The upper clamping device (5) comprises: An upper clamping cylinder (51) is arranged on the top of the frame (1); An upper clamping block (52) is arranged on the upper clamping cylinder (51) and is provided with an upper clamping groove (521); An upper clamping base plate (55) is arranged on the top of the frame (1); Two upper clamping shafts (56) are symmetrically arranged on the upper clamping base plate (55) and are arranged opposite to the upper clamping groove (521); and A plurality of upper clamping rollers (58) are arranged on the upper clamping shaft (56).

5. The automatic pin welding fixing device according to claim 1, characterized in that: The positioning device (6) comprises: A lower positioning plate (62) is arranged on the frame (1); An elastic device, arranged on the lower positioning plate (62); A positioning seat (66) is arranged on the elastic device; and Two positioning magnets (67) are symmetrically arranged on the positioning seat (66) and are used to absorb the connecting plate (92).

6. The automatic pin welding fixing device according to claim 5, characterized in that: The elastic device comprises: An elastic shaft (63) is arranged on the lower positioning plate (62); a spring (64) movably disposed on the elastic shaft (63); and An upper positioning plate (65) is movably disposed on the elastic shaft (63) and is connected to the spring (64).

7. The automatic pin welding fixing device according to claim 5, characterized in that: The lower positioning plate (62) is provided with a lower positioning block (621); The frame (1) is provided with a lower positioning groove (551), and the lower positioning block (621) is slidably inserted into the lower positioning groove (551).

8. An automatic pin welding fixing device according to any one of claims 1 to 7, characterized in that: The upper pressing device (7) comprises: An upper pressing cylinder (72) is arranged on the top of the frame (1); A plurality of guide shafts (73) are arranged on the top of the frame (1); The upper pressing plate (71) is movably arranged on the guide shaft (73) and connected to the upper pressing cylinder (72). The pressing plate (8) is arranged on the upper pressing plate (71). The upper pressing plate (71) is provided with a welding hole (711) which is in communication with the welding groove (81).

9. The automatic pin welding fixing device according to claim 8, characterized in that: The upper pressing plate (71) is provided with a mounting groove (712), the pressing plate (8) is provided with a pressing block (82), and the pressing block (82) is inserted into the mounting groove (712).

10. An automatic pin-shaft welding fixing device according to any one of claims 1 to 7, characterized in that: The top of the frame (1) is provided with a plurality of insertion slots (14), and the upper clamping device (5), the positioning device (6) and the upper pressing device (7) are all provided with side surfaces of the insertion slots (14).

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