CN114160980B

CN114160980B - Laser welding equipment

Info

Publication number: CN114160980B
Application number: CN202111423242.8A
Authority: CN
Inventors: 成伟华
Original assignee: Guangdong Vocational and Technical College
Current assignee: Guangdong Vocational and Technical College
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2023-07-28
Anticipated expiration: 2041-11-26
Also published as: CN114160980A

Abstract

The invention provides laser welding equipment, which relates to the field of welding and comprises a first material rack component, a second material rack component, a laser component and a reflecting component; a first cylinder in the first rack assembly has a first perforation; a second cylinder in the second rack assembly has a second perforation; the reflecting head is provided with a processing through hole which is arranged along the axial direction and an emergent through hole which is arranged along the radial direction; a control structure and a poking piece are arranged in the transmitting head, and a reflecting layer is arranged on the front surface of the poking piece; the end part of the poking piece is in a first state, and the first perforation, the processing through hole and the perforation of the reflecting sleeve are communicated; the end of the poking plate is in a second state, the processing through hole is cut off by the poking plate, and the axis of the first perforation and the axis of the emergent through hole penetrate through the reflecting layer. The laser beam of the laser welding equipment and the direction adjusting equipment of the laser beam are respectively introduced from the two ends of the tubular workpiece, so that the space requirement of equipment related to laser welding is reduced as much as possible, and the applicability of the equipment is improved.

Description

Laser welding equipment

Technical Field

The invention relates to the field of welding equipment, in particular to laser welding equipment.

Background

For the seamless welding of the junction of two tubular parts, the conventional means is laser welding outside the junction of the two tubular parts.

The welding mode of carrying out laser welding only in the outside of two tubular part joints has the problem such as unable inboard welding quality of assurance, if need weld in the inside of two tubular part joints, on the one hand, because the problem of size restriction, need solve the technical problem how the laser beam enters into the welded position, on the other hand, because the degree of difficulty of monitoring is great, still need solve the confirmation problem of the welded position of laser beam.

Disclosure of Invention

In order to solve the internal welding problem of the existing laser equipment to the tubular part, the invention provides the laser welding equipment, and the laser beam and the direction adjusting equipment of the laser beam are respectively introduced from two ends of the tubular workpiece, so that the space requirement of the equipment related to laser welding is reduced as much as possible, and the applicability of the equipment is improved; the special structural design of the reflecting head solves the positioning problem of the laser beam and the direction change problem of the laser beam at the same time, and has good practicability.

Correspondingly, the invention provides laser welding equipment which comprises a first material frame component, a second material frame component, a laser component and a reflecting component;

the first material rack assembly comprises a first cylinder, wherein the first cylinder is provided with a first perforation arranged along the axis direction of the first cylinder;

the laser assembly comprises a tail end output interface which is connected into the first perforation from the outer side end surface of the first cylinder;

the second material rack component comprises a second cylinder which is coaxial with the first cylinder and moves towards or away from the inner side end surface of the first cylinder; the second cylinder is provided with a second perforation arranged along the axis direction of the second cylinder;

the reflecting assembly comprises a reflecting head and a reflecting sleeve, the reflecting sleeve is positioned in the second perforation, two ends of the reflecting sleeve penetrate out of two ends of the second perforation respectively, and the reflecting head is fixed on one end, facing the first cylinder, of the reflecting sleeve;

the reflecting head is provided with a processing through hole and an emergent through hole which are arranged along the axial direction, the processing through hole is respectively coaxial with the first perforation and the reflecting sleeve, the emergent through hole penetrates into the processing through hole from the side surface of the reflecting head, and the processing through hole is communicated with the perforation of the reflecting sleeve;

when the second cylinder moves towards the inner side end surface of the first cylinder to reach the end of the stroke, the reflecting head is in contact with the inner side end surface of the first cylinder, and the first perforation is communicated with the processing through hole;

a control structure and a poking piece are arranged in the transmitting head, and a reflecting layer is arranged on the front surface of the poking piece; the root of the poking piece is hinged to the transmitting head, and the end part of the poking piece is switched between a first state and a second state based on the control of the control structure;

the end part of the poking piece is in a first state, and the first perforation, the processing through hole and the perforation of the reflecting sleeve are communicated;

the end part of the poking piece is in a second state, the processing through hole is cut off by the poking piece, and the axis of the first perforation and the axis of the emergent through hole penetrate through the reflecting layer.

In an alternative embodiment, the reflection assembly further includes a reflection driving member for driving the reflection head to rotate around the axis of the processing through hole through the reflection sleeve.

In an optional embodiment, the first material rack assembly further includes a first driving module, the first cylinder is a rotation output shaft of the first driving module, and two ends of the first cylinder respectively penetrate out of the first driving module;

the second material rack assembly further comprises a second driving module, the second cylinder is a rotation output shaft of the second driving module, and two ends of the second cylinder respectively penetrate out of the second driving module; the reflecting sleeve is in rotary fit in the second perforation, and the orientation of the emergent through hole is kept unchanged.

In an alternative embodiment, the laser welding apparatus further comprises a lower rail, an axis of which is parallel to an axis of the first cylinder;

the second driving module is in sliding fit on the lower guide rail;

the second cylinder moves towards or away from the outer side end surface of the first cylinder through the cooperation of the lower guide rail and the second driving module.

In an alternative embodiment, the second material rack assembly further comprises a mating ring, a push ring and a thrust module;

the inner diameter of the matching ring is matched with the wire diameter of the second cylinder, and the matching ring is axially matched with the second cylinder in a sliding way and is kept relatively fixed with the second cylinder in the circumferential direction;

the matching ring comprises a front section and a rear section, wherein the front section is close to the first cylinder, the rear section is far away from the first cylinder, and the wire diameter of the rear section is larger than that of the front section;

the push ring is arranged outside the side wall of the second cylinder in a surrounding manner, and the matching ring is positioned on one side of the push ring facing the first cylinder;

the push ring is abutted against the opposite surface of the matching ring;

the thrust module drives the push ring to move towards or away from the outer end face of the first cylinder.

In an alternative embodiment, the lower part of the push ring is in sliding fit on the lower guide rail; the thrust module is used for driving the push ring to move along the lower guide rail.

In an alternative embodiment, a limiting block for limiting the push ring is arranged on the lower guide rail.

In an alternative embodiment, a plurality of lock holes are arranged on the surface of the first cylinder.

In an alternative embodiment, the first rack assembly further comprises a clamping ring;

the middle part of the clamping ring is provided with a circular clamping hole, the first cylinder is positioned in the circular clamping hole, and the wire diameter of the first cylinder is different from the aperture of the circular clamping hole by a preset value;

the lower part of the clamping ring is arranged on the lower guide rail in a sliding way.

In summary, the invention provides a laser welding device, and a laser beam and a direction adjusting device of the laser beam are respectively introduced from two ends of a tubular workpiece, so as to reduce the space requirement of the device related to laser welding as much as possible and improve the applicability of the device; the special structural design of the reflecting head solves the positioning problem of the laser beam and the direction change problem of the laser beam at the same time, and has good practicability.

Drawings

Fig. 1 shows a first schematic view of a three-dimensional structure of a laser welding apparatus according to an embodiment of the present invention.

Fig. 2 shows a second schematic view of a three-dimensional structure of a laser welding apparatus according to an embodiment of the present invention.

Fig. 3 is a schematic cross-sectional structure of a laser welding apparatus according to an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Fig. 1 shows a first schematic view of a three-dimensional structure of a laser welding apparatus according to an embodiment of the present invention. Fig. 2 shows a second schematic view of a three-dimensional structure of a laser welding apparatus according to an embodiment of the present invention, and fig. 3 shows a schematic view of a cross-sectional structure of the laser welding apparatus according to an embodiment of the present invention.

The embodiment of the invention provides laser welding equipment, which comprises a first material frame component, a second material frame component, a laser component 9 and a reflecting component. For clarity of illustration, the structures of the first tubular workpiece and the second tubular workpiece are not shown in fig. 1 and 2 of the drawings, and the cross-sectional structures of the first tubular workpiece and the second tubular workpiece are shown in fig. 3 of the drawings.

Basically, regardless of practical implementation problems such as installation convenience and feeding and discharging convenience, the first material frame component is a component for positioning a first tubular workpiece, and the second material frame component is a component for positioning a second tubular workpiece, and the matching postures of the first tubular workpiece and the second tubular workpiece can meet the requirement of laser welding through positioning the first tubular workpiece and the second tubular workpiece respectively. After the first tubular workpiece and the second tubular workpiece are positioned, the first tubular workpiece and the second tubular workpiece are already matched, and in the laser welding device of the embodiment of the invention, laser welding of the first tubular workpiece and the second tubular workpiece is required to be realized in the inner part of the matched position of the first tubular workpiece and the second tubular workpiece.

Specifically, the first material rack assembly comprises a first cylinder 6, and the first cylinder 6 is provided with a first perforation 20 arranged along the axial direction of the first cylinder 6; in particular, the first cylinder 6 can be understood as a component located inside the first tubular workpiece for conducting the laser light, irrespective of the problem of structural bulkiness, etc. Due to the cylindrical structure of the first cylinder 6, it can extend into and reach a specified position within the first tubular workpiece from one end of the first tubular workpiece or pass out from the other end of the first tubular workpiece. In particular, the first cylinder 6 may also have an outer diameter that is suitably modified for the engagement of the first tubular workpiece.

The laser assembly 9 comprises a terminal output interface which is accessed into the first perforation 20 from the outer end face of the first cylinder 6; specifically, the laser component 9 is a laser device for welding, and a welding laser device in the prior art may be selected according to actual requirements, and in the embodiment of the present invention, an output interface at the end of the laser component 9 (that is, an output end of a component located at the last stage on a laser exit path in the laser component 9) is disposed opposite to the first through hole 20, and the emitted laser can be led into the first through hole 20, and the emitted laser can reach the inner end face side from the outer end face side of the first cylinder 6. Considering the guiding problem of the laser, the laser beam within a short distance will not be significantly diffused, and the line diameter of the first perforation 20 is larger than the size of the laser beam; to prevent accidental generation, the inner sidewall of the first through hole 20 may be reinforced to avoid laser damage; further, a photoconductive material may be applied in the first through hole 20 for reflecting the laser beam therethrough without damaging the first through hole 20.

In particular, the second rack assembly comprises a second cylinder 5, the second cylinder 5 being coaxial with the first cylinder 6 and the second cylinder 5 moving towards or away from the inner end face of the first cylinder 6; the second cylinder 5 has a second perforation provided along the axial direction of the second cylinder 5. In the present embodiment, the second cylinder 5 is understood as a member located inside the second tubular workpiece, and the basic function of the second cylinder 5 is mainly for the arrangement of the reflecting assembly.

The reflecting assembly comprises a reflecting head 16 and a reflecting sleeve, the reflecting sleeve is positioned in the second perforation, two ends of the reflecting sleeve respectively penetrate out of two ends of the second perforation, and the reflecting head 16 is fixed on one end of the reflecting sleeve 23 facing the first cylinder 6; the reflecting sleeve is in a structure positioned in the second perforation of the second cylinder 5, and further, in order to facilitate the fixation of the reflecting sleeve, the reflecting sleeve can be closely attached to the side wall of the second perforation; the two ends of the reflecting sleeve respectively penetrate through the two ends of the second perforation, the reflecting head 16 is fixed on one end of the reflecting sleeve, which faces the first cylinder 6, and one end of the reflecting sleeve, which is far away from the first cylinder 6, is used for fixing the reflecting sleeve externally.

Specifically, the reflection head 16 has a processing through hole 21 arranged in the axial direction and an exit through hole 22 arranged in the radial direction, the processing through hole 21 being coaxial with the first penetration hole 20 and the reflection sleeve 23, respectively, the exit through hole 22 penetrating into the processing through hole 21 from the side of the reflection head 16, the processing through hole 21 communicating with the penetration hole of the reflection sleeve 23.

When the second cylinder 5 moves towards the inner end surface of the first cylinder 6 to the end of the stroke, the reflecting head 16 contacts with the inner end surface of the first cylinder 6, the first through hole 20 is communicated with the processing through hole 21, and at this time, the first cylinder 6, the reflecting head 16 and the second cylinder 5 are kept in a contact connection state in sequence, and the first through hole 20, the processing through hole 21 and the second through hole are communicated.

Specifically, a control structure and a poking plate 15 are arranged in the transmitting head, and a reflecting layer is arranged on the front surface of the poking plate 15; the root of the poking piece 15 is hinged on the transmitting head, and based on the control of the control structure, the end part of the poking piece 15 is switched between a first state and a second state. Optionally, considering the control difficulty and the control efficiency, the control structure may be an electromagnet, and the electromagnet may perform adsorption control on the end of the pulling piece 15, so as to switch the state of the pulling piece 15.

Specifically, referring to the drawings, according to the direction of illustration, the paddle 15 swings clockwise to the end of travel (the position indicated by the broken line in fig. 3) to be in the first state, and swings counterclockwise to the end of travel to be in the second state (the position indicated by the actual line in fig. 3).

In a first state, the first through hole 20, the processing through hole 21, and the through hole of the reflective sleeve 23 are penetrated by the end of the paddle 15; in this state, when the laser beam is incident from the outside of the first through hole 20, the laser beam is emitted from the through hole of the reflection sleeve 23.

In the second state, the end of the paddle 15 is cut off by the paddle 15, and the axis of the first through hole 20 and the axis of the exit through hole 22 pass through the reflective layer. In this state, if the laser beam is incident from the outside of the first through hole 20, the laser beam is emitted from the emission through hole 22.

Based on the above description of the basic structure of the laser welding device, the working principle of the laser welding device is that the first material frame component and the second material frame component respectively position a first tubular workpiece and a second tubular workpiece which need to be welded by laser; after the positioning of the first tubular workpiece and the second tubular workpiece is completed, the first cylinder 6 and the second cylinder 5 are located at the corresponding positions inside the corresponding first tubular workpiece and second tubular workpiece, respectively (the manner of how the first cylinder 6 and the second cylinder 5 are located at the corresponding positions inside the corresponding first tubular workpiece and second tubular workpiece will be described later); in order to ensure the tightness of the transmission area of the laser beam, after the positioning of the first cylinder 6 and the second cylinder 5 is completed, the first cylinder 6 is closely attached to the emitter, and the first through hole 20, the processing through hole 21, and the through hole of the reflecting sleeve 23 are communicated.

After the assembly is completed, the shifting piece 15 is switched to the first state, the laser assembly 9 is started with low power and emits a positioning laser beam, the laser beam is led in from one end of the first through hole 20 and exits from the other end of the first through hole 20, sequentially passes through the processing through hole 21 and the through hole of the reflecting sleeve 23, and exits, and the corresponding positioning device is used for judging whether the position of the positioning laser beam meets the condition and correspondingly adjusts the position until the positioning of the positioning laser beam meets the preset condition (the positioning laser beam is generally designed to be coaxial with the through hole of the reflecting sleeve 23 so as to facilitate detection).

After the positioning of the positioning laser beam meets the preset condition, the shifting sheet 15 is switched to the second state, the laser assembly 9 is started at high power and emits the welding laser beam, and the welding laser beam is emitted through the emission through hole 22 after being reflected by the reflecting layer of the shifting sheet 15. Specifically, the position of the shifting piece 15 when being switched to the second state is fixed, and the positioning calibration of the positioning laser beam can ensure that the welding laser beam can point to the designated position after the shifting piece 15 is switched to the second state so as to weld the first tubular workpiece and the second tubular workpiece.

It should be noted that, the foregoing embodiments only describe the key structures involved in the laser welding of the inner sides of the first tubular workpiece and the second tubular workpiece, and in the specific implementation, the welding of the first tubular workpiece and the second tubular workpiece needs to be completed, and related auxiliary structures are also required.

Specifically, the welding of the first tubular workpiece and the second tubular workpiece needs to be performed on the entire circumferential area of the first tubular workpiece and the second tubular workpiece, and in the embodiment of the present invention, the exit position of the welding laser beam is determined, so, in order to ensure that the complete welding of the circumferential seams of the first tubular workpiece and the second tubular workpiece can be performed by adopting two forms of the movement of the reflection head 16 or the movement of the workpiece.

In particular, if an embodiment of movement of the emitter head is adopted, optionally, the reflection assembly further comprises a reflection driving member for driving the reflection head 16 to rotate around the axis of the processing through hole 21 by the reflection sleeve. Because the reflecting head 16 is fixed on the reflecting sleeve, the rotation of the reflecting sleeve drives the reflecting head 16 to rotate, and correspondingly, in the second state, the posture of the poking piece 15 changes and the direction of the emergent through hole 22 correspondingly changes along with the rotation of the reflecting head 16, so that the reflected laser beam can be driven along the circumferential direction, and the laser beam can completely weld the circumferential joints of the first tubular workpiece and the second tubular workpiece. Further, in order to satisfy positioning fixation of the first tubular workpiece and the second tubular workpiece, the circumferential surface of the outer side wall of the first cylinder 6 may be adapted to the inner wall of the first tubular workpiece, and the circumferential surface of the outer side wall of the second cylinder 5 may be adapted to the inside of the second tubular workpiece. Since this embodiment is easy to understand, the embodiments of the present invention will not be further described.

Specifically, if the implementation manner of workpiece movement is adopted, in the embodiment of the present invention, the first material rack assembly further includes a first driving module 8, the first cylinder 6 is a rotation output shaft of the first driving module 8, and two ends of the first cylinder 6 respectively pass through the first driving module 8; the second material rack assembly further comprises a second driving module 2, the second cylinder 5 is a rotation output shaft of the second driving module 2, and two ends of the second cylinder 5 respectively penetrate out of the second driving module 2; the reflective sleeve is rotationally fitted in the second aperture, the exit through hole 22 being kept facing the same.

Specifically, the movement of the workpieces (the rotation of the first tubular workpiece and the rotation of the second tubular workpiece) needs to be completed by external equipment driving; in order to avoid structural bulkiness, in combination with the structural characteristics of the first cylinder 6 and the second cylinder 5 (both have perforations), in the embodiment of the present invention, the first cylinder 6 and the second cylinder 5 may also directly serve as the rotating shafts of the corresponding driving structures, so as to simplify the structure.

Further, in order to meet the requirement of inserting and extracting the workpiece, the first cylinder 6 and the second cylinder 5 need to be capable of moving relatively to meet the requirement of use, in the embodiment of the present invention, the first cylinder 6 may be understood as a relatively fixed member, and the second cylinder 5 is a relatively moving member, so as to avoid the workpiece through translation of the second cylinder 5. In particular, in order to ensure the motion stability of the second cylinder 5, the laser welding apparatus further comprises a lower guide rail 1, wherein the axis of the lower guide rail 1 is parallel to the axis of the first cylinder 6; the second driving module 2 is in sliding fit on the lower guide rail 1; the second cylinder 5 is moved toward or away from the outer end face of the first cylinder 6 by the cooperation of the lower rail 1 and the second drive module 2.

Further, for positioning and movement driving of the first tubular workpiece and the second tubular workpiece, optionally, the outer side wall of the first cylinder 6 may be designed according to the inner side wall of the first tubular workpiece, and similarly, the outer side wall of the second cylinder 5 may be designed according to the inner side wall of the second tubular workpiece. The first tubular workpiece and the second tubular workpiece are respectively fixed on the first cylinder 6 and the second cylinder 5, and the rotation movement of the first cylinder 6 and the second cylinder 5 can drive the first tubular workpiece and the second tubular workpiece to synchronously rotate so as to weld the laser beams with fixed pointing positions.

From the description of the foregoing structure, at the time of laser welding, the first cylinder 6, the reflecting head 16, and the second cylinder 5 need to be kept in contact, that is, the relative positions of the first cylinder 6, the reflecting head 16, and the second cylinder 5 are fixed, and, considering that the contact surfaces of the first tubular workpiece and the second tubular workpiece are not necessarily smooth, it is necessary to supplement a new structure on this basis to achieve supply of pressure because a certain pressure is required between the first tubular workpiece and the second tubular workpiece to ensure that the welding bonding of the first tubular workpiece and the second tubular workpiece is better, but the relative positions of the first cylinder 6, the reflecting head 16, and the second cylinder 5 cannot be changed.

In order to realize pressure supply, the embodiment of the invention correspondingly improves the structure of the second material rack assembly.

Specifically, the second material rack assembly further comprises a matching ring 4, a push ring 3 and a thrust module; the inner diameter of the matching ring 4 is matched with the wire diameter of the second cylinder 5, and the matching ring 4 is axially and slidably matched on the second cylinder 5 and is kept relatively fixed with the second cylinder 5 in the circumferential direction; the mating ring 4 comprises a front section located close to the first cylinder 6 and a rear section located far from the first cylinder 6, the wire diameter of the rear section being larger than the wire diameter of the front section; the push ring 3 is arranged outside the side wall of the second cylinder 5 in a surrounding manner, and the matching ring 4 is positioned on the side of the push ring 3 facing the first cylinder 6; the push ring 3 is abutted against the opposite surface of the matching ring 4; the thrust module drives the push ring 3 to move towards or away from the outer end face of the first cylinder 6. In this embodiment, the outer diameter of the second cylinder 5 is smaller than the inner diameter of the second tubular workpiece, the outer diameter of the front section of the mating ring 4 being adapted to the inner diameter of the second tubular workpiece, the second tubular workpiece being fixed to the front section of the mating ring 4; only the degree of freedom of relative sliding (relative rotation is not allowed) between the mating ring 4 and the second cylinder 5, so that the rotational drive of the second cylinder 5 can drive the rotation of the mating ring 4; correspondingly, in the embodiment of the invention, the push ring 3 is used for providing pressure for the matching ring 4 (namely, the second tubular workpiece), the matching ring 4 is abutted against the push ring 3, and the acting force of the push ring 3 exerted by the thrust module finally acts on the matching ring 4.

Alternatively, the thrust module may be a screw drive module. Specifically, the screw rod driving module is a driving module taking the screw rod 11 as a power output structure, and referring to the schematic structure in the figure, the screw rod 11 is simultaneously matched on the clamping ring and the push ring 3, and the screw rod can drive the push ring 3 to move by driving the screw rod to rotate on the premise of fixing the clamping ring.

Specifically, the lower part of the push ring 3 is in sliding fit on the lower guide rail 1; the thrust module is used for driving the push ring 3 to move along the lower guide rail 1. The guiding of the lower guide rail 1 can ensure the stable movement of the push ring 3, and ensure that the driving force of the push ring 3 acting on the matching ring 4 is stable.

Specifically, the welding requirements for the specific first tubular workpiece and the specific second tubular workpiece are consistent, so when the position of the second tubular workpiece reaches the preset position, the supply of pressure can be stopped, so that the transition welding is avoided, the axial dimension of the finished product is reduced, and therefore, a limiting block for limiting the push ring 3 is arranged on the lower guide rail 1, and the limiting block can limit the push ring 3 to move towards one side of the first cylinder 6.

Specifically, in order to ensure the connection reliability of the first tubular workpiece and the first cylinder 6, a plurality of lock holes are formed in the surface of the first cylinder 6, and the synchronicity of the rotation of the first cylinder 6 and the rotation of the first tubular workpiece can be ensured through the fixing mode that the locking piece penetrates through the first tubular workpiece and is fixed on the corresponding shrinkage cavity. Correspondingly, a similar lock hole can be arranged on the matching ring 4 so as to ensure the connection reliability of the second tubular workpiece and the second cylinder 5.

Further, if the axial dimension of the first tubular workpiece is too long, the extension length of the first cylinder 6 toward the side of the second cylinder 5 is long, and deflection easily occurs when the first cylinder 6 rotates. Thus, to ensure rotational stability of the first cylinder 6, the first magazine assembly further comprises a clamping ring 7; the middle part of the clamping ring 7 is provided with a circular clamping hole, the first cylinder 6 is positioned in the circular clamping hole, and the line diameter of the first cylinder 6 is different from the aperture of the circular clamping hole by a preset value; the lower part of the clamping ring 7 is arranged on the lower guide rail 1 in a sliding way. When first tubular workpiece material loading, first tubular workpiece is located between first cylinder 6 and clamp ring 7, and simultaneously, clamp ring 7, first tubular workpiece and first cylinder 6 contact in proper order, and clamp ring 7 can carry out the bearing to first cylinder 6 through first tubular workpiece, guarantees the stability of first cylinder 6 tip one side. Meanwhile, the clamping ring 7 can move along the lower guide rail 1, the bearing position can be reasonably selected, and the adjusting convenience is good.

Furthermore, in order to ensure quality, the laser welding may be performed simultaneously on the outside, and specifically, an external laser welding assembly 12 is further disposed on the outside of the welding position of the first tubular workpiece and the second tubular workpiece.

In addition, in order to further enhance the motion stability and motion balance of the relevant components guided by the lower rail, the laser welding apparatus of the embodiment of the present invention further includes an upper rail 10; the relevant components that are slip-fitted on the lower rail can also be slip-fitted on the upper rail 10 at the same time to enhance its operational stability.

In summary, the working process of the laser welding apparatus according to the embodiment of the present invention is as follows:

firstly, a second cylinder, a matching ring and a push ring matched on the second cylinder are driven to one side far away from the first cylinder through a second driving module, and then the first annular workpiece is fixed on the first cylinder respectively, and the second annular workpiece is fixed on the matching ring.

After the first annular workpiece and the second annular workpiece are fixed, the second cylinder is driven to a position where the reflecting head is attached to the first cylinder by the second driving module, and it should be noted that the positions of the matching ring and the push ring are not limited in this action.

Pushing the matching ring to one side of the first cylinder by the driving of the push ring, and tightly attaching the second tubular workpiece to the first tubular workpiece; in this action, since the abutting surface of the second tubular workpiece and the first tubular workpiece is not perfectly smooth, the push ring may not move to the stroke end, and the force of the push ring is always present.

The laser assembly is started in a low-power mode to generate a laser beam (in specific implementation, the laser beam can be replaced by a visible light directional beam), the poking plate is adjusted to a first state, the laser beam passes through the second perforation, at the moment, the passing-out position of the laser beam can be perceived through external equipment, and generally, the laser beam needs to be adjusted to the axial position of the second perforation.

After the adjustment is finished, the plectrum is adjusted to a second state, and the laser beam is reflected to the emergent perforation by the reflecting layer of the plectrum and then is emitted; at this time, the first cylinder and the second cylinder start to rotate synchronously to drive the first tubular workpiece and the second tubular workpiece to rotate, and the laser assembly is adjusted to the working power to form a laser beam usable for welding. Before the push ring does not contact the limiting block, the welding pressure can be continuously provided so as to adjust the second tubular workpiece to a proper position, and after the push ring contacts the limiting block, the pressure of the compression ring on the second tubular workpiece disappears.

The external laser component can work synchronously while the laser component works.

In summary, the embodiment of the invention provides a laser welding device, aiming at welding two tubular workpieces, considering the narrow internal space of the tubular workpieces, in order to realize the laser welding of the inner sides of the tubular workpieces, laser beams and direction adjusting devices of the laser beams are respectively introduced from two ends of the tubular workpieces, so that the space requirements of the devices related to the laser welding are reduced as much as possible, and the applicability of the devices is improved; the special structural design of the reflecting head solves the positioning problem of the laser beam and the direction change problem of the laser beam at the same time, and has good practicability.

While the foregoing has been described in some detail by way of illustration of the principles and embodiments of the invention, specific examples have been set forth herein to provide a thorough understanding of the method and core concepts of the invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.

Claims

1. The laser welding equipment is characterized by comprising a first material frame component, a second material frame component, a laser component and a reflecting component;

2. The laser welding apparatus of claim 1, wherein the reflective assembly further comprises a reflective drive for driving the reflective head to spin about the axis of the process throughbore via the reflective sleeve.

3. The laser welding apparatus of claim 1, wherein the first work-piece rack assembly further comprises a first drive module, the first cylinder is a rotation output shaft of the first drive module, and two ends of the first cylinder respectively penetrate out of the first drive module;

4. The laser welding apparatus of claim 3, further comprising a lower rail having an axis parallel to an axis of the first cylinder;

the second driving module is in sliding fit on the lower guide rail;

5. The laser welding apparatus of claim 4, wherein the second work-piece rack assembly further comprises a mating ring, a push ring, and a thrust module;

the push ring is abutted against the opposite surface of the matching ring;

6. The laser welding apparatus of claim 5 wherein a lower portion of the push ring is a slip fit on the lower rail; the thrust module is used for driving the push ring to move along the lower guide rail.

7. The laser welding apparatus according to claim 6, wherein a stopper for restricting the push ring is provided on the lower rail.

8. A laser welding apparatus as claimed in claim 3, characterised in that the surface of the first cylinder is provided with a number of locking holes.

9. The laser welding apparatus of claim 4, wherein the first work-holder assembly further comprises a clamp ring;