A coaxial profiled workpiece welding positioning device and method

Abstract

The application discloses a kind of welding positioning device of coaxial special-shaped workpiece, including base, shaft support seat and shaft seat, also including positioning plate and slide cylinder, positioning plate and slide cylinder are all provided with shaft hole, slide cylinder is installed with fastening bolt by multiple internal screw holes, the left and right side plane of positioning plate is respectively provided with second positioning line A and second positioning line B, second positioning line B extends from shaft hole to the outer surface of slide cylinder;It is also disclosed that its welding positioning method is used for welding the coaxial special-shaped workpiece composed of shaft and several special-shaped workpieces sleeved on the shaft;The application solves the problems existing in the prior art welding method of complex workpiece, is simple and fast and has few tooling components, saves tooling component cost, effectively improves work efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of welding processing, and relates to a welding method, in particular to a coaxial special-shaped workpiece welding positioning device and a welding positioning method. BACKGROUND

[0002] In mechanical transmission, in order to accurately transmit the state of control movement, a cam, a groove wheel and the like components are welded on a rotating shaft at a certain relative angle, and the movement state of the rotating shaft is transmitted to a roller moving close to the edge or a connecting rod freely moving on the groove surface through the components.

[0003] When welding a coaxial special-shaped workpiece composed of a rotating shaft and a plurality of accessory components distributed at different angles on the rotating shaft, the conventional welding method cannot meet the coaxiality, angle and position precision requirements of the complex workpiece welding.

[0004] Chinese invention patent "2019110552379 A kind of welding method of complex workpiece", for welding the workpiece composed of rotating shaft and a plurality of accessory components connected on rotating shaft, the patent method has the following defects: positioning tooling components are many, and the welding positioning of each workpiece to be welded needs to be disassembled and positioned, and the workpiece is repositioned, which is time-consuming and extremely uneconomical. SUMMARY

[0005] In order to solve the problem of welding complex workpieces with high coaxiality, angle and position precision, one of the purposes of the present application is to provide a coaxial special-shaped workpiece welding positioning device.

[0006] The technical scheme adopted by the present application to solve its technical problems is: a coaxial special-shaped workpiece welding positioning device for welding a workpiece composed of a rotating shaft and a plurality of accessory components connected on the rotating shaft, each special-shaped workpiece is welded on the shaft, the longitudinal position, radial angle and planar shape of each special-shaped workpiece are different, the positioning device comprises a base, two shaft support seats erected on the base and a shaft seat arranged on the shaft support seat, and further comprises a positioning plate and a sliding cylinder fixed on the positioning plate, the right side surface of the positioning plate is fixed with the left side surface of the sliding cylinder, and the shaft holes adapted to the shaft are arranged on the positioning plate and the sliding cylinder, the shaft holes are sleeved on the shaft and are in transition fit with the shaft to ensure that the positioning plate is always perpendicular to the axial direction of the shaft during the sliding process of the sliding cylinder along the shaft, the sliding cylinder is installed with fastening bolts through a plurality of internal screw holes, the fastening bolts fix the shaft on the positioning device through the internal screw holes, and the left and right side planes of the positioning plate are respectively provided with a second positioning line A and a second positioning line B, the second positioning line B extends from the contact position between the shaft hole and the shaft of the positioning plate to the outer surface of the sliding cylinder and ends.

[0007] The second purpose of the present application is to provide a first welding positioning method based on the above-mentioned welding positioning device, which comprises the following steps:

[0008] S1, the first positioning line is arranged axially on the outer periphery of the shaft, and a plurality of fourth positioning lines are arranged radially on the outer periphery of the shaft, the plurality of fourth positioning lines are matched with the longitudinal positions of each profiled workpiece to be welded on the shaft in turn, and then the left and right ends of the shaft are movably connected to the left and right two shaft seats;

[0009] S2, the third positioning line and the profiled workpiece peripheral contour line are drawn on the lofting drawing, the peripheral contour line is the designed position of the profiled workpiece welded on the shaft, and the hole of the lofting drawing is passed through the shaft;

[0010] S3, the lofting drawing is pasted on the left side of the positioning plate and the third positioning line of the lofting drawing is aligned with the second positioning line A of the positioning plate, then the first profiled workpiece, the positioning plate and the slide cylinder of the positioning device are sequentially sleeved on the shaft, the left side of the positioning plate faces the first profiled workpiece, and the two ends of the shaft are placed on the shaft seat and the shaft is temporarily fixed;

[0011] S4, the first profiled workpiece is moved left and right, the left side of the first profiled workpiece is aligned with the first fourth positioning line on the shaft from left to right, then the left side of the positioning plate is tightly attached to the right side of the first profiled workpiece, the second positioning line B is aligned with the first positioning line of the shaft by rotating the slide cylinder, the second positioning line A of the positioning plate and the third positioning line of the lofting drawing are aligned with the first positioning line of the shaft, the fastening bolt is tightened, then the first profiled workpiece is rotated, the peripheral contour of the first profiled workpiece is aligned with the peripheral contour line of the lofting drawing, the profiled workpiece and the positioning plate are clamped with the clamp, the longitudinal positioning and radial positioning of the profiled workpiece are completed, and the profiled workpiece is spot-welded on the shaft;

[0012] S5, then the constraint of the shaft seat is removed, the fastening bolt is loosened, the positioning plate and the slide cylinder of the positioning device are pulled out from the right end of the shaft, the remaining profiled workpieces are sequentially positioned and spot-welded according to the above steps, and finally the welding of the profiled workpieces is completed.

[0013] The third object of the present application is to provide a second welding positioning method based on the above welding positioning device, which comprises the following steps:

[0014] S1, the first positioning line is arranged axially on the outer periphery of the shaft, and a plurality of fourth positioning lines are arranged radially on the outer periphery of the shaft, the plurality of fourth positioning lines are matched with the longitudinal positions of each profiled workpiece to be welded on the shaft in turn, and then the left and right ends of the shaft are movably connected to the left and right two shaft seats;

[0015] S2, the third positioning line and the profiled workpiece peripheral contour line are drawn on the lofting drawing, the peripheral contour line is the designed position of the profiled workpiece welded on the shaft, and the hole of the lofting drawing is passed through the shaft;

[0016] S3, again set up the fifth positioning line on each profiled workpiece to be welded, sequentially put each profiled workpiece on the shaft, then put the positioning plate and the slide cylinder of the positioning device on the shaft, make the left side of the positioning plate face each profiled workpiece, then put the two ends of the shaft on the shaft seat and temporarily fix the shaft;

[0017] S4, move each profiled workpiece and the positioning plate to each other and move the whole of each profiled workpiece and the positioning plate, make the left side of the first profiled workpiece align with the first fourth positioning line from left to right on the shaft, then rotate the first profiled workpiece, make the fifth positioning line of the first profiled workpiece align with the first positioning line on the shaft, thus the longitudinal positioning and the radial positioning of the first profiled workpiece are completed, then tighten the fastening bolt, then clamp each profiled workpiece and the positioning plate with the clamp, then spot weld the first profiled workpiece on the shaft;

[0018] S5, then loosen the clamp and the fastening bolt, move the rest of each profiled workpiece and the positioning plate, make the left side of the second profiled workpiece align with the second fourth positioning line from left to right on the shaft, then rotate the second profiled workpiece, make the fifth positioning line of the second profiled workpiece align with the first positioning line on the shaft, thus the longitudinal positioning and the radial positioning of the second profiled workpiece are completed, then tighten the fastening bolt, clamp each profiled workpiece and the positioning plate with the clamp, then spot weld the second profiled workpiece on the shaft;

[0019] S6, sequentially position and spot weld the rest of the profiled workpieces according to the above steps, finally remove the constraint of the shaft seat, loosen the fastening bolt, then take out the positioning device from the shaft, thus the welding work of each profiled workpiece is completed.

[0020] The present application solves the problems existing in the prior art welding method of complex workpieces, is simple and fast, and has few tooling components, thus saving the cost of tooling components and effectively improving the work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic view of the welding positioning device of the present application;

[0022] Figure 2 is a left side view of the positioning plate of the present application;

[0023] Figure 3 is a right side view of the positioning plate of the present application;

[0024] Figure 4 is a sectional view of the positioning device of the present application;

[0025] Figure 5 is an elevation view of the lofting drawing of the present application;

[0026] Figure 6 is an elevation view of the profiled workpiece of the present application;

[0027] Figure 7 is the elevation view of the shaft of the special-shaped workpiece;

[0028] Figure 8 is the elevation view of the installation of the second special-shaped workpiece;

[0029] Figure 9 is the schematic view of the installation of the multiple special-shaped workpieces.

[0030] The reference signs are: 1-positioning device, 2-positioning plate, 3-sliding cylinder, 4-fastening bolt, 5-shaft, 6-shaft seat, 7-shaft support seat, 8-base, 9-first positioning line, 10-second positioning line A, 11-lofting drawing, 12-second positioning line B, 13-internal screw hole, 14-special-shaped workpiece, 15-third positioning line, 16-multiple fourth positioning lines, 17-fifth positioning line. DETAILED DESCRIPTION

[0031] The application will be further described in detail below with reference to the drawings. The drawings of the embodiments are shown in the drawings, and the same reference signs represent the same or similar elements or elements having the same or similar functions.

[0032] Referring to Figure 1 , the application discloses a welding positioning device for coaxial special-shaped workpieces, which is used for welding coaxial special-shaped workpieces composed of a shaft 5 and a plurality of special-shaped workpieces 14 sleeved on the shaft 5. Each special-shaped workpiece 14 is welded on the shaft 5, and the longitudinal position, radial angle, and planar shape of each special-shaped workpiece 14 are different. Figure 7 Each special-shaped workpiece 14 is sleeved on the shaft 5 and welded with the shaft 5.

[0033] The positioning device 1 comprises a base 8, two shaft support seats 7 vertically arranged on the base 8, and a shaft seat 6 arranged on the shaft support seat 7. The positioning device 1 further comprises a positioning plate 2 and a sliding cylinder 3 fixed on the positioning plate 2. The right side surface of the positioning plate 2 is fixed with the left side surface of the sliding cylinder 3. The positioning plate 2 and the sliding cylinder 3 are both provided with a shaft hole (through hole) matched with the shaft 5. The through hole is sleeved on the shaft 5 and is in transition fit with the shaft 5, so as to ensure that the positioning plate 2 is always perpendicular to the axial direction of the shaft 5 during the sliding process of the sliding cylinder 3 along the shaft 5. The sliding cylinder 3 is installed with a fastening bolt 4 through a plurality of internal screw holes 13. The fastening bolt 4 fixes the shaft 5 on the positioning device 1 through the internal screw holes 13, as shown in Figure 4 .

[0034] Referring to Figure 2 , Figure 3 , the left and right side planes of the positioning plate 2 are respectively provided with a second positioning line A 10 and a second positioning line B 12. The second positioning line B 12 extends from the contact position between the through hole and the shaft 5 of the positioning plate 2 to the outer surface of the sliding cylinder 3 and ends.

[0035] Referring toFigures 4 to 9 The first welding positioning method based on the welding positioning device 1 comprises the following steps:

[0036] S1, a first positioning line 9 is arranged on the outer periphery of the shaft 5 in the axial direction, and a plurality of fourth positioning lines 16 are arranged on the outer periphery of the shaft 5 in the radial direction, the plurality of fourth positioning lines 16 are matched with the longitudinal positions of each profiled workpiece 14 to be welded on the shaft 5 in turn, and then the left and right ends of the shaft 5 are movably connected to the left and right shaft seats 6.

[0037] S2, a hole is opened on the lofting drawing 11, and a third positioning line 15 and a profiled workpiece 14 outer periphery contour line are drawn on the lofting drawing 11, The the profiled workpiece 14 outer periphery contour line is the designed position of the profiled workpiece 14 welded on the shaft 5, and the hole of the lofting drawing 11 is passed through the shaft 5.

[0038] S3, the lofting drawing 11 is pasted on the left side of the positioning plate 2 and the third positioning line 15 thereof is aligned with the second positioning line A 10 of the positioning plate 2, then the first profiled workpiece 14 and the positioning device 1 are successively sleeved on the shaft 5, the left side of the positioning plate 2 faces the first profiled workpiece 14, and the two ends of the shaft 5 are placed on the shaft seats 6 and the shaft 5 is temporarily fixed; Figure 1 It is a schematic view of the installation of the first profiled workpiece.

[0039] S4, the first profiled workpiece 14 is moved left and right, so that the left side of the first profiled workpiece 14 is aligned with the first fourth positioning line 16 on the shaft 5 from left to right, then the left side of the positioning plate 2 is tightly attached to the right side of the first profiled workpiece 14, the second positioning line B 12 is rotated to align with the first positioning line 9 of the shaft 5, so that the second positioning line A 10 of the positioning plate 2 and the third positioning line 15 of the lofting drawing 11 are both aligned with the first positioning line 9 of the shaft 5, the fastening bolt 4 is then tightened, the first profiled workpiece 14 is rotated, so that the outer periphery contour of the first profiled workpiece 14 is aligned with the profiled workpiece 14 outer periphery contour line of the lofting drawing 11, the profiled workpiece 14 and the positioning plate 2 are clamped with a clamp, so that the longitudinal positioning and radial positioning of the profiled workpiece 14 are completed, and the profiled workpiece 14 is spot-welded on the shaft 5.

[0040] S5, then the constraint of the shaft seat 6 is removed, the fastening bolt 4 is loosened, the positioning plate 2 and the sliding cylinder 3 of the positioning device 1 are pulled out from the right end of the shaft 5, the remaining profiled workpieces 14 are positioned and spot-welded in turn according to the above steps, and finally the welding of the profiled workpieces is completed. Figure 7 The mark 19 is the welding point of the profiled workpiece 14 and the shaft 5.

[0041] The second welding positioning method based on the welding positioning device comprises the following steps:

[0042] The second object of the present application is to provide a second welding positioning method based on the welding positioning device.

[0043] S1, a first positioning line 9 is arranged on the outer periphery of the shaft 5 in the axial direction, and a plurality of fourth positioning lines 16 are arranged on the outer periphery of the shaft 5 in the radial direction, the plurality of fourth positioning lines 16 are matched with the longitudinal positions of each profiled workpiece 14 to be welded on the shaft 5 in turn, and then the left and right ends of the shaft 5 are movably connected to the left and right shaft seats 6.

[0044] S2, a hole is opened on the lofting drawing 11, a third positioning line 15 and a profiled workpiece 14 peripheral contour line are drawn on the lofting drawing 11, the peripheral contour line is the designed position of the profiled workpiece 14 welded on the shaft 5, and the hole of the lofting drawing 11 is passed through the shaft 5.

[0045] S3, the fifth positioning line 17 is marked on each profiled workpiece 14 to be welded during machining, each profiled workpiece 14 is successively sleeved on the shaft 5, the positioning plate 2 and the sliding cylinder 3 of the positioning device 1 are sleeved on the shaft 5, the left side of the positioning plate 2 faces each profiled workpiece 14, and the two ends of the shaft 5 are placed on the shaft seat 6 and the shaft 5 is temporarily fixed.

[0046] S4, each profiled workpiece 14 and the positioning plate 2 are moved towards each other and the whole of each profiled workpiece 14 and the positioning plate 2 is moved, the left side of the first profiled workpiece 14 is aligned with the first fourth positioning line 16 from left to right on the shaft 5, the first profiled workpiece 14 is rotated, the fifth positioning line 17 of the first profiled workpiece 14 is aligned with the first positioning line 9 on the shaft 5, the longitudinal positioning and radial positioning of the first profiled workpiece 14 are completed, the fastening bolt 4 is tightened, each profiled workpiece 14 and the positioning plate 2 are clamped with a clamp, and the first profiled workpiece 14 is spot-welded on the shaft 5.

[0047] S5, then the clamp is loosened, the fastening bolt 4 is loosened, the whole of each profiled workpiece 14 and the positioning plate 2 is moved, the left side of the second profiled workpiece 14 is aligned with the second fourth positioning line 16 from left to right on the shaft 5, the second profiled workpiece 14 is rotated, the fifth positioning line 17 of the second profiled workpiece 14 is aligned with the first positioning line 9 on the shaft 5, the longitudinal positioning and radial positioning of the second profiled workpiece 14 are completed, the fastening bolt 4 is tightened, each profiled workpiece 14 and the positioning plate 2 are clamped with a clamp, and the second profiled workpiece 14 is spot-welded on the shaft 5.

[0048] S6, the positioning and spot-welding of the remaining each profiled workpiece 14 are completed in turn, finally the constraint of the shaft seat 6 is removed, the fastening bolt 4 is loosened, the positioning device 1 is pulled out of the shaft 5, and the welding work of each profiled workpiece is completed.

[0049] It should be noted that if the surface of the special-shaped workpiece is not allowed to have a notch, this case is applicable to the method one of the present application, and if the surface of the special-shaped workpiece is allowed to have a notch, this case is applicable to the method two of the present application, obviously, the method two is much simpler and faster than the method one.

[0050] The above examples only illustrate the principles and effects of the present application and some applied embodiments, and those skilled in the art can make several modifications and improvements without departing from the concept of the present application, which are all within the protection scope of the present application.

Claims

1. A welding positioning method for a welding positioning device, characterized in that: The welding positioning device for coaxial special-shaped workpieces comprises a base (8), two shaft support seats (7) erected on the base (8) and a shaft seat (6) arranged on the shaft support seat (7), and also comprises a positioning plate (2) and a slide cylinder (3) fixed on the positioning plate (2), wherein both the positioning plate (2) and the slide cylinder (3) are provided with shaft holes, the slide cylinder (3) is provided with fastening bolts (4) through a plurality of inner screw holes (13), the left and right side planes of the positioning plate (2) are respectively provided with a second positioning line A (10) and a second positioning line B (12), and the second positioning line B (12) extends from the shaft hole to the outer surface of the slide cylinder (3); and comprises the following steps: S1, a first positioning line (9) is axially arranged on the outer periphery of the shaft (5), and a plurality of fourth positioning lines (16) are radially arranged on the outer periphery of the shaft (5), wherein the fourth positioning lines (16) match the longitudinal positions of the various special-shaped workpieces (14) to be welded on the shaft (5), and then the left and right ends of the shaft (5) are movably connected to the shaft seat (6); S2, opening a hole on the lofting drawing (11), drawing a third positioning line (15) and an outer contour line of the special-shaped workpiece (14) on the lofting drawing (11), and passing the opening of the lofting drawing (11) through the shaft (5); S3, stick the layout drawing (11) on the left side of the positioning plate (2) and align the third positioning line (15) with the second positioning line A (10), then put the first special-shaped workpiece (14) and the positioning plate (2) and the slide (3) on the shaft (5), so that the left side of the positioning plate (2) faces the first special-shaped workpiece (14), and then place both ends of the shaft (5) on the shaft seat (6) and temporarily fix them; S4, move the first special-shaped workpiece (14) left and right so that the left side of the first special-shaped workpiece (14) is aligned with the first fourth positioning line (16) from the left on the shaft (5), then the left side of the positioning plate (2) is pressed against the right side of the first special-shaped workpiece (14), and at the same time, rotate the slide (3) so that the second positioning line B (12) is aligned with the first positioning line (9) of the shaft (5), then tighten the fastening bolt (4), and then rotate the first special-shaped workpiece (14) so ​​that the outer contour of the first special-shaped workpiece (14) is aligned with the outer contour line of the lofting drawing (11), and then clamp it with a clamp to complete the longitudinal positioning and radial positioning of the special-shaped workpiece (14), and spot weld the special-shaped workpiece (14) on the shaft (5); S5, remove the shaft seat (6), loosen the fastening bolts (4), pull out the positioning plate (2) and the slide (3) from the right end of the shaft (5), and position and spot weld the remaining special-shaped workpieces (14) in sequence according to the above steps.

2. A welding positioning method for a welding positioning device, characterized in that: The welding positioning device for coaxial special-shaped workpieces comprises a base (8), two shaft support seats (7) erected on the base (8) and a shaft seat (6) arranged on the shaft support seat (7), and also comprises a positioning plate (2) and a slide cylinder (3) fixed on the positioning plate (2), wherein both the positioning plate (2) and the slide cylinder (3) are provided with shaft holes, the slide cylinder (3) is provided with fastening bolts (4) through a plurality of inner screw holes (13), the left and right side planes of the positioning plate (2) are respectively provided with a second positioning line A (10) and a second positioning line B (12), and the second positioning line B (12) extends from the shaft hole to the outer surface of the slide cylinder (3); and comprises the following steps: S1, a first positioning line (9) is axially arranged on the outer periphery of the shaft (5), and a plurality of fourth positioning lines (16) are radially arranged on the outer periphery of the shaft (5), wherein the fourth positioning lines (16) match the longitudinal positions of the various special-shaped workpieces (14) to be welded on the shaft (5), and then the left and right ends of the shaft (5) are movably connected to the shaft seat (6); S2, opening a hole on the lofting drawing (11), drawing a third positioning line (15) and an outer contour line of the special-shaped workpiece (14) on the lofting drawing (11), and passing the opening of the lofting drawing (11) through the shaft (5); S3, then set a fifth positioning line (17) on each special-shaped workpiece (14) to be welded, put each special-shaped workpiece (14) on the shaft (5) in turn, then put the positioning plate (2) and the slide (3) on the shaft (5), so that the left side of the positioning plate (2) faces the special-shaped workpiece (14), and then place both ends of the shaft (5) on the shaft seat (6) and temporarily fix them; S4, bring the various special-shaped workpieces (14) and the positioning plate (2) closer to each other and move them as a whole, so that the left side of the first special-shaped workpiece (14) is aligned with the first fourth positioning line (16) from the left on the shaft (5), and then rotate the first special-shaped workpiece (14) so ​​that the fifth positioning line (17) of the first special-shaped workpiece (14) is aligned with the first positioning line (9) on the shaft (5), completing the longitudinal positioning and radial positioning of the first special-shaped workpiece (14), and then tightening the fastening bolts (4) and clamping with a clamp, and spot welding the first special-shaped workpiece (14) to the shaft (5); S5, then loosen the clamp and the fastening bolt (4), move the remaining special-shaped workpieces (14) and the positioning plate (2) as a whole, so that the left side of the second special-shaped workpiece (14) is aligned with the second fourth positioning line (16) from the left on the shaft (5), and then rotate the second special-shaped workpiece (14) so ​​that the fifth positioning line (17) of the second special-shaped workpiece (14) is aligned with the first positioning line (9) on the shaft (5), completing the longitudinal positioning and radial positioning of the second special-shaped workpiece (14), and then tighten the fastening bolt (4), clamp the special-shaped workpieces (14) and the positioning plate (2) with a clamp, and spot weld the second special-shaped workpiece (14) to the shaft (5); S6, positioning and spot welding the remaining special-shaped workpieces (14) in sequence according to the above steps.

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