A laser welding device and method for a special-shaped titanium alloy thin-walled part

Abstract

The application relates to the technical field of welding devices, and discloses a laser welding device and method for a special-shaped titanium alloy thin-wall part, wherein the laser welding device for the special-shaped titanium alloy thin-wall part comprises a welding device, is further provided with a mounting frame fixedly connected in the welding device, a straight slot is perpendicular to a guide slot, a second guide rod is always located above a support frame, and when a first extender pushes the second guide rod, the first extender drives a circular shaft to move along the path of the first guide rod. By adjusting the angle of the first guide rod, then pulling the second guide rod through the first extender, the circular shaft can move along the path of the guide slot, the circular shaft is used for welding at a weld, automatic welding is realized, the production efficiency can be improved, the welding quality is ensured, meanwhile, the production speed can be improved, the welding quality and consistency can be effectively ensured, the influence of human factors on the welding quality is reduced, and the cost is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding devices, in particular to a laser welding device and method for a special-shaped titanium alloy thin-walled part. BACKGROUND

[0002] The laser welding device is an advanced manufacturing equipment, which uses a high-energy density laser beam to weld materials, and its working principle is to focus the laser on the joint of the workpiece to melt and solidify instantaneously to form a weld.

[0003] However, in the prior art, many special-shaped titanium alloy thin-walled parts are conical, so that the weld often has an inclined angle. Usually, manual and mechanical arm welding are used, but since the wall thickness of the titanium alloy thin-walled part is thin, heat distortion and excessive heat-affected zone are prone to occur during welding, which requires uniform distribution of welding heat, otherwise it is easy to cause overheating or insufficient heat at the welding position, thereby affecting the strength and toughness of the welding position. Manual operation cannot meet such high precision requirements. Continuous and long-distance inclined welds increase the labor intensity of welders, resulting in poor welding continuity and easy injury to welders. At the same time, the quality of internal welds is also difficult to guarantee, and defects such as incomplete penetration and porosity are prone to occur. Therefore, enterprises try to use a mechanical arm to cooperate with a platform for adjusting the direction to weld. However, this scheme can improve welding precision and efficiency, but the cost is high, and the requirements for equipment are more stringent. The introduction of a mechanical arm requires a large amount of capital investment, and professional personnel are needed for equipment maintenance and maintenance. Moreover, when welding welds with different inclined angles, the mechanical arm needs to be programmed and accurately calibrated, which increases the preparation time and cost of welding, seriously affecting the progress and efficiency of welding production.

[0004] Therefore, a laser welding device and method for a special-shaped titanium alloy thin-walled part are proposed, which can weld welds with different inclined angles of special-shaped titanium alloy thin-walled parts at will. SUMMARY

[0005] The present application relates to the technical field of welding devices, in particular to a laser welding device and method for a special-shaped titanium alloy thin-walled part.

[0006] The application provides a laser welding device for special-shaped titanium alloy thin-wall parts.

[0007] Further, the first guide rod is provided with a guide notch, the second guide rod is provided with a straight notch, the bottom of the round shaft is located in the guide notch, the top of the round shaft is located in the straight notch, and the straight notch is perpendicular to the guide notch when the first guide rod is in an initial state.

[0008] Further, the inside of the welding device is provided with a guide rail, the support plate is slidably connected to the outside of the guide rail, the top of the welding device is provided with a slot, the output end of the first telescopic device is provided with an extension rod, the extension rod is located in the slot, and the extension rod is connected between the first telescopic device and the second guide rod.

[0009] Further, the mounting frame comprises a limiting sleeve fixedly connected to the inside of the welding device and a connecting frame fixedly connected to one side of the limiting sleeve, and the bottom of the control rotating shaft is rotatably connected to the inside of the connecting frame.

[0010] Further, the control rotating shaft comprises a rotating sleeve rotatably connected to the inside of the connecting frame, a second transmission wheel fixedly connected to the outside of the rotating sleeve, a handle wheel fixedly connected to the top of the rotating sleeve and an indicating scale fixedly connected to the top of the handle wheel, and the outside of the handle wheel and the fixed screw rod are both provided with a plurality of rough circular strips.

[0011] Further, the inside of the first guide rod is fixedly connected with a connecting sleeve, the connecting sleeve is rotatably connected to the inside of the connecting frame, the outside of the connecting sleeve is fixedly connected with a first transmission wheel, the transmission belt is sleeved between the first transmission wheel and the second transmission wheel, and the transmission ratio of the first transmission wheel and the second transmission wheel is 1:1.

[0012] Further, the welding device is connected with the connecting rod frame between the round shaft, the connecting rod frame is slidably connected outside the round shaft, and the connecting rod frame is provided with a screw between the round shaft.

[0013] Further, a straight bar is arranged inside the welding device near the handle wheel, the straight bar penetrates the handle wheel, the outside of the straight bar is provided with a scale, and the indicating scale is attached to the outside of the straight bar.

[0014] Further, a fixed screw is threadedly connected inside the welding device near the rotating sleeve, one end of the fixed screw near the rotating sleeve is an inner arc surface, and the arc degree of the inner arc surface is the same as the outer diameter of the rotating sleeve.

[0015] Another aspect of the present application provides: equipment inspection and maintenance: ensure that the laser welding equipment, power supply and gas source are connected normally, and necessary preheating is carried out.

[0016] Focus position adjustment: according to the welding material and thickness, the key parameters of laser power, pulse width and repetition frequency are set, at the same time, the mold is installed above the support plate, the rotation angle of the first guide rod is adjusted, and the distance between the support plate and the round shaft is adjusted to ensure that the laser focus is accurately aligned with the welding position.

[0017] Formal welding: according to the set parameters, the second guide rod is pulled by the first telescopic device, so that the round shaft is welded along the inclined path of the first guide rod, and the welding process is closely observed to ensure the welding quality.

[0018] Cooling and inspection: after welding, natural or forced cooling is carried out, and the welding quality is checked by using detection equipment.

[0019] The beneficial effects of the present application are:

[0020] 1. By adjusting the angle of the first guide rod, then pulling the second guide rod by the first telescopic device, the round shaft can move along the path of the guide slot, and the round shaft can be used for welding at the weld, realizing automatic welding, improving production efficiency, ensuring welding quality, realizing high production speed, effectively ensuring welding quality and consistency, reducing the influence of human factors on welding quality, and effectively reducing cost.

[0021] 2. By rotating the first guide rod, the position of the round shaft and the welding device can be controlled for welding, finer heat distribution can be realized, the round shaft can be controlled by a single second guide rod, the complexity of electronic and software control is reduced, the failure rate is generally low, the wear resistance and fatigue resistance are high, the consistency of each product is ensured, and the product quality is improved.

[0022] 3、Through the support plate and support frame to fix the welding parts, this conventional installation mode provides stable workpiece clamping and positioning, and the position of the first guide rod can be quickly adjusted by rotating the rotating sleeve, and the welding can be completed by starting the first telescopic device to pull the second guide rod to move back and forth, the skill requirement of the operator is reduced, the learning complexity is reduced, the standardized production is easy to realize, the need for repeated learning is reduced, a large number of welding tasks can be quickly completed, and the production cycle is greatly shortened. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a perspective view of the first view of the application;

[0024] Figure 2 It is a schematic view of the overall structure of the application;

[0025] Figure 3 It is a schematic view of the structure of the control shaft of the application;

[0026] Figure 4 It is an enlarged view of A in the application; Figure 2

[0027] Figure 5 It is a top view of the application;

[0028] Figure 6 It is a sectional view of B-B in the application; Figure 5

[0029] Figure 7 It is a schematic view of the structure of the first guide rod of the application;

[0030] Figure 8 It is a state diagram when the first guide rod of the application rotates.

[0031] In the figure:

[0032] 1, welding equipment; 101, guide rail; 102, slot; 103, straight bar; 2, mounting frame; 21, limiting sleeve; 22, connecting frame; 3, first guide rod; 31, guide slot; 311, connecting sleeve; 312, first transmission wheel; 4, control shaft; 41, rotating sleeve; 42, second transmission wheel; 43, handle wheel; 44, indicating scale; 5, round shaft; 6, second guide rod; 61, straight slot; 7, first telescopic device; 71, extension rod; 8, transmission belt; 9, third telescopic device; 10, support plate; 11, second telescopic device; 12, support frame; 13, welding device; 131, connecting rod frame; 14, fixing screw. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the application more obvious and easy to understand, the specific embodiments of the application will be described in detail below with reference to the drawings.​​

[0034] Embodiment 1, refer to Figures 1-8 , the first embodiment of the application provides a laser welding device for special-shaped titanium alloy thin-walled parts, which comprises a welding device 1, a mounting frame 2 fixedly connected inside the welding device 1, a first guide rod 3 rotatably connected outside the mounting frame 2, a control rotating shaft 4 rotatably connected inside the welding device 1, a circular shaft 5 slidably connected inside the first guide rod 3, a second guide rod 6 arranged at the top of the welding device 1, a first extender 7 fixedly connected to the top end of the welding device 1, a transmission belt 8 sleeved between the control rotating shaft 4 and the mounting frame 2, a third extender 9 fixedly connected inside the welding device 1, a support plate 10 slidably connected inside the welding device 1, a second extender 11 fixedly connected to the top of the support plate 10, a support frame 12 fixedly connected to the output end of the second extender 11, and a welder 13 sleeved outside the circular shaft 5. The second guide rod 6 is fixedly connected with the output end of the first extender 7, the circular shaft 5 is located between the first guide rod 3 and the first extender 7, the first guide rod 3 is located above the support plate 10, the support plate 10 is located on one side of the first guide rod 3, and the second guide rod 6 is always located above the support frame 12. When the first extender 7 pushes the second guide rod 6, it drives the circular shaft 5 to move along the path of the first guide rod 3, so that high production speed can be achieved, the welding task can be completed quickly, and the production efficiency can be improved. At the same time, in repeated work, precise welding can be effectively realized, the welding quality and consistency can be ensured, the welding process is automated, the influence of human factors on the welding quality is further reduced, and the safety risk in the welding process is also reduced.

[0035] It can be understood that before processing, the customer will provide the welding requirement and the welding condition, i.e. the angle, width and depth of the welding seam, so as to feel the inclination angle and width of the welding seam, according to the corresponding welding head, adjust the posture and motion trail of the welding head according to the provided data, and for special-shaped titanium alloy thin-walled parts, a special mold needs to be manufactured, so that the special-shaped titanium alloy thin-walled part has sufficient stability when being fixed, and the mold is installed above the support plate 10 and below the support frame 12.

[0036] Refer to Figures 1-3 , a guide notch 31 is formed in the first guide rod 3, a straight notch 61 is formed in the second guide rod 6, the bottom of the circular shaft 5 is located inside the guide notch 31, and the top end of the circular shaft 5 is located inside the straight notch 61.

[0037] Specifically, the two ends of the round shaft 5 are located inside the guide notch 31 and the linear notch 61 respectively, so that the round shaft 5 is limited by two paths at the same time, while the second guide rod 6 can only perform single reciprocating translation, and the first guide rod 3 can only perform rotation, so that when the welding seam angle is adjusted, the first guide rod 3 can be rotated, and the round shaft 5 will not rotate with the first guide rod 3, but will be extruded by the first guide rod 3 when the first guide rod 3 rotates, at this time the round shaft 5 will translate inside the linear notch 61.

[0038] With reference to Figures 1-7 , the inside of the welding equipment 1 is provided with a guide rail 101, the support plate 10 is slidingly connected outside the guide rail 101, a slot 102 is formed at the top of the welding equipment 1, the output end of the first extender 7 is provided with an extension rod 71, the extension rod 71 is located inside the slot 102, and the extension rod 71 is connected between the first extender 7 and the second guide rod 6.

[0039] Specifically, the support plate 10 is supported by the guide rail 101, and the first extender 7 is fixedly arranged at the top of the welding equipment 1. The first extender 7 is stretched and contracted to drive the extension rod 71 to move reciprocally, so that the extension rod 71 moves inside the slot 102, and the second guide rod 6 can move reciprocally, and the second guide rod 6 drives the round shaft 5 connected inside the second guide rod 6 to move synchronously.

[0040] With reference to Figures 2-5 , the mounting frame 2 comprises a limiting sleeve 21 fixedly connected inside the welding equipment 1 and a connecting frame 22 fixedly connected to one side of the limiting sleeve 21, and the bottom of the control shaft 4 is rotatably connected inside the connecting frame 22, so that the control shaft 4 is further stabilized by the connecting frame 22, and the control shaft 4 is prevented from deviating.

[0041] With reference to Figures 2-6 , the first guide rod 3 is fixedly connected with a connecting sleeve 311 inside, the connecting sleeve 311 is rotatably connected inside the connecting frame 22, and the first guide rod 3 can only rotate with the connecting sleeve 311 as the fulcrum and the center of the circle, the first guide rod 3 is fixedly connected with a first transmission wheel 312 outside the connecting sleeve 311, and the transmission belt 8 is sleeved between the first transmission wheel 312 and the second transmission wheel 42, so that the two can rotate synchronously.

[0042] With reference to Figures 2-6The control rotating shaft 4 comprises a rotating sleeve 41 rotatably connected inside the connecting frame 22, a second transmission wheel 42 fixedly connected outside the rotating sleeve 41, a handle wheel 43 fixedly connected to the top of the rotating sleeve 41, and an indicating scale 44 fixedly connected to the top of the handle wheel 43. The transmission ratio of the first transmission wheel 312 and the second transmission wheel 42 is 1:1. When the handle wheel 43 rotates to drive the second transmission wheel 42 to rotate, the transmission belt 8 will synchronously drive the first transmission wheel 312 to rotate, and the first transmission wheel 312 and the second transmission wheel 42 have the same rotation angle, so that the rotation angle of the first guide rod 3 is more easily controlled. The handle wheel 43 and the fixed screw rod 14 are both provided with a plurality of rough circular strips, so that the handle wheel 43 and the fixed screw rod 14 are more easily controlled, the strength and toughness of the welding position are ensured, and the production efficiency and welding quality are improved. When the first guide rod 3 is in the initial state, the straight slot 61 is perpendicular to the guide slot 31.

[0043] With reference to Figures 1-8 The welding device 1 is provided with a fixed screw rod 14 threadedly connected to a position close to the rotating sleeve 41 inside the welding device 1. Rotating the fixed screw rod 14 can make the fixed screw rod 14 translate. By rotating the fixed screw rod 14, the fixed screw rod 14 is attached to the rotating sleeve 41, and the rotating sleeve 41 is fixed by the fixed screw rod 14. One end of the fixed screw rod 14 close to the rotating sleeve 41 is an inner arc surface, and the arc degree of the inner arc surface is the same as the outer diameter of the rotating sleeve 41, so that the fixed screw rod 14 is more attached to the rotating sleeve 41. When the rotating sleeve 41 is fixed by the fixed screw rod 14, the rotating sleeve 41 can be more effectively fixed, and the first guide rod 3 cannot move.

[0044] With reference to Figures 1-8 The welding device 1 is provided with a straight bar 103 close to the handle wheel 43. The straight bar 103 penetrates the handle wheel 43, and the outside of the straight bar 103 is provided with a scale. The indicating scale 44 is attached to the outside of the straight bar 103. By observing the attachment of the indicating scale 44 and the straight bar 103, the rotation angle of the handle wheel 43 can be known.

[0045] The working principle of the present application is as follows: the mold is installed above the support plate 10 and below the support frame 12, then the special-shaped titanium alloy thin-walled part is placed on the mold on the top of the support plate 10, then the second telescopic device 11 is retracted, thereby driving the support frame 12 and the mold outside the support frame 12 to move downward, thereby fixing the special-shaped titanium alloy thin-walled part, according to the inclination angle of the conical structure, rotating the fixing screw 14 to release the fixing of the rotating sleeve 41, then rotating the indicating scale 44 to drive the rotating sleeve 41, the second transmission wheel 42 and the indicating scale 44 to rotate synchronously, when the second transmission wheel 42 rotates, the first transmission wheel 312 is driven to rotate by the transmission belt 8, the first transmission wheel 312 drives the connecting sleeve 311 to rotate synchronously inside the limiting sleeve 21, the connecting sleeve 311 drives the first guide rod 3 to rotate, according to the angle of the indicating scale 44 and the straight bar 103, the rotation angle of the handle wheel 43 is obtained, thereby controlling the rotation angle of the first guide rod 3, when the first guide rod 3 rotates, since the circular shaft 5 is located inside the straight slot 61 and the guide slot 31, the circular shaft 5 is extruded by the rotation of the first guide rod 3, so that the circular shaft 5 inside the first guide rod 3 automatically moves inside the straight slot 61 and the guide slot 31, that is, the first guide rod 3 rotates with the connecting sleeve 311 as the center, so that the inclination angle of the first guide rod 3 is the same as the inclination of the weld seam, then the fixing screw 14 is rotated to fix the rotating sleeve 41, so that the control rotating shaft 4 cannot rotate as a whole, thereby locking the first guide rod 3, at this time, the support plate 10 is pushed by the third telescopic device 9, so that the titanium alloy thin-walled part moves to the position close to the welder 13, then after reaching the appropriate position, the screw between the connecting rod frame 131 and the circular shaft 5 is rotated, the connecting rod frame 131 is pulled, so that the welder 13 and the connecting rod frame 131 reach the weld seam, so that the welder 13 is attached to the weld seam, then the screw is fixed so that the connecting rod frame 131 cannot move, at this time, the extension rod 71 is moved by the first telescopic device 7, so that the extension rod 71 drives the second guide rod 6 to translate, at this time, the second guide rod 6 drives the circular shaft 5 to move synchronously, and the welder 13 is located outside the circular shaft 5, when the circular shaft 5 moves, the bottom is limited by the first guide rod 3, so that the bottom of the circular shaft 5 slides inside the guide slot 31, and the top of the circular shaft 5 slides inside the straight slot 61 while the second guide rod 6 translates, thereby welding the weld seam with any inclination angle.

[0046] Embodiment 2, refer to Figures 1-8 , which is a second embodiment of the present application, provides: a method for using a laser welding device for special-shaped titanium alloy thin-walled parts, comprising the following steps:

[0047] Equipment inspection and maintenance: Ensure that the laser welding equipment, power supply, gas source connection is normal, and carry out necessary preheating.

[0048] Focal position adjustment: According to the welding material and thickness, set the laser power, pulse width, repetition frequency key parameters, at the same time, install the mold above the support plate 10, adjust the rotation angle of the first guide rod 3, and adjust the distance between the support plate 10 and the circular shaft 5, to ensure that the laser focal point is accurately aligned with the welding position.

[0049] Formal welding: According to the set parameters, pull the second guide rod 6 through the first telescopic device 7, so that the circular shaft 5 along the inclined path of the first guide rod 3 for welding, at the same time, closely observe the welding process, to ensure the quality of the weld.

[0050] Cooling and inspection: After welding, natural or forced cooling is carried out, and the quality of the weld is checked using detection equipment.

Claims

1. A laser welding apparatus for irregularly shaped thin-walled titanium alloy parts, comprising welding equipment (1), characterized in that: It also includes a mounting bracket (2) fixedly connected inside the welding equipment (1), a first guide rod (3) rotatably connected outside the mounting bracket (2), a control shaft (4) rotatably connected inside the welding equipment (1), a round shaft (5) slidably connected inside the first guide rod (3), a second guide rod (6) set on the top of the welding equipment (1), a first telescopic device (7) fixedly connected to the top of the welding equipment (1), a transmission belt (8) sleeved between the control shaft (4) and the mounting bracket (2), a third telescopic device (9) fixedly connected inside the welding equipment (1), a support plate (10) slidably connected inside the welding equipment (1), and a first telescopic device (9) fixedly connected to the top of the support plate (10). Two telescopic devices (11), a support frame (12) fixedly connected to the output end of the second telescopic device (11), and a welder (13) sleeved on the outside of the round shaft (5). The second guide rod (6) is fixedly connected to the output end of the first telescopic device (7). The round shaft (5) is located between the first guide rod (3) and the first telescopic device (7). The first guide rod (3) is located above the support plate (10). The support plate (10) is located on one side of the first guide rod (3). The second guide rod (6) is always located above the support frame (12). When the first telescopic device (7) pushes the second guide rod (6), it drives the round shaft (5) to move along the path of the first guide rod (3). The first guide rod (3) has a guide groove (31), and the second guide rod (6) has a straight groove (61). The bottom of the round shaft (5) is located inside the guide groove (31), and the top of the round shaft (5) is located inside the straight groove (61). When the first guide rod (3) is in the initial state, the straight groove (61) is perpendicular to the guide groove (31).

2. The laser welding apparatus for irregularly shaped thin-walled titanium alloy parts according to claim 1, characterized in that: The welding equipment (1) is provided with a guide rail (101) inside. The support plate (10) is slidably connected to the outside of the guide rail (101). The top of the welding equipment (1) is provided with a slot (102). The output end of the first telescopic device (7) is provided with an extension rod (71). The extension rod (71) is located inside the slot (102). The extension rod (71) is connected between the first telescopic device (7) and the second guide rod (6).

3. The laser welding apparatus for irregularly shaped thin-walled titanium alloy parts according to claim 1, characterized in that: The mounting bracket (2) includes a limiting sleeve (21) fixedly connected inside the welding equipment (1) and a connecting bracket (22) fixedly connected to one side of the limiting sleeve (21). The bottom of the control shaft (4) is rotatably connected inside the connecting bracket (22).

4. The laser welding apparatus for irregularly shaped thin-walled titanium alloy parts according to claim 3, characterized in that: The control shaft (4) includes a rotating sleeve (41) rotatably connected inside the connecting frame (22), a second transmission wheel (42) fixedly connected outside the rotating sleeve (41), a gripping wheel (43) fixedly connected to the top of the rotating sleeve (41), and an indicator ruler (44) fixedly connected to the top of the gripping wheel (43). The gripping wheel (43) and the fixing screw (14) are both provided with multiple rough circular strips on their outer surfaces.

5. The laser welding apparatus for irregularly shaped thin-walled titanium alloy parts according to claim 4, characterized in that: The first guide rod (3) is fixedly connected to a connecting sleeve (311), which is rotatably connected to the inside of the connecting frame (22). The connecting sleeve (311) is fixedly connected to a first transmission wheel (312) on the outside. The transmission belt (8) is sleeved between the first transmission wheel (312) and the second transmission wheel (42). The transmission ratio of the first transmission wheel (312) and the second transmission wheel (42) is one to one.

6. The laser welding apparatus for irregularly shaped thin-walled titanium alloy parts according to claim 4, characterized in that: A connecting rod frame (131) is connected between the welding device (13) and the round shaft (5). The connecting rod frame (131) is slidably connected to the outside of the round shaft (5). A screw is provided between the connecting rod frame (131) and the round shaft (5).

7. The laser welding apparatus for irregularly shaped thin-walled titanium alloy parts according to claim 4, characterized in that: The welding equipment (1) has a straight bar (103) located inside near the grip wheel (43), the straight bar (103) passes through the grip wheel (43), the outside of the straight bar (103) is marked with a scale, and the indicator ruler (44) is attached to the outside of the straight bar (103).

8. The laser welding apparatus for irregularly shaped thin-walled titanium alloy parts according to claim 7, characterized in that: The welding equipment (1) has a fixed screw (14) threadedly connected to the inside near the rotating sleeve (41). The end of the fixed screw (14) near the rotating sleeve (41) is an inner arc surface, and the arc of the inner arc surface is the same as the outer diameter of the rotating sleeve (41).

9. A method for using a laser welding apparatus for irregularly shaped thin-walled titanium alloy parts, comprising the laser welding apparatus for irregularly shaped thin-walled titanium alloy parts as described in claim 1, characterized in that... Includes the following steps: Equipment inspection and maintenance: Ensure that the laser welding equipment, power supply, and gas supply are properly connected and perform necessary preheating; Focus position adjustment: Based on the welding material and thickness, set the key parameters of laser power, pulse width and repetition frequency. At the same time, install the mold above the support plate (10), adjust the rotation angle of the first guide rod (3), and then adjust the distance between the support plate (10) and the round shaft (5) to ensure that the laser focus is accurately aligned with the welding part. Formal welding: According to the set parameters, the second guide rod (6) is pulled by the first telescopic device (7) so that the round shaft (5) is welded along the inclined path of the first guide rod (3). At the same time, the welding process is closely observed to ensure the quality of the weld. Cooling and Inspection: After welding is completed, allow it to cool naturally or by force, and use testing equipment to inspect the quality of the weld.

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