A guide rail welding device

Abstract

The present application relates to metal guide rail processing equipment technical field, provide a kind of guide rail welding device, solve the technical problem that unilateral section difference is larger when the existing guide rail is welded, will affect the running stability of moving part.A kind of guide rail welding device, characterized by: including welding mechanism, a pair of clamping mechanism, a pair of limiting mechanism, a pair of guide mechanism and butt joint mechanism;The clamping direction of a pair of clamping mechanism is perpendicular to the butt joint direction of a pair of clamping mechanism, and one of the clamping mechanism is supported on the connecting frame along the clamping direction;A pair of limiting mechanism is arranged on a pair of clamping mechanism;A pair of guide mechanism is arranged on the two sides of a pair of clamping mechanism;Butt joint mechanism includes butt joint positioning structure, butt joint guide structure and butt joint drive unit, a pair of clamping mechanism is positioned along the clamping direction by butt joint positioning structure, and connecting frame is slidably installed on butt joint guide structure and is driven by butt joint drive unit.

Description

Technical Field

[0001] This invention relates to the field of metal guide rail processing equipment, and more specifically to a guide rail welding device. Background Technology

[0002] As a core guiding and load-bearing component in industrial automation equipment and precision machine tools, the quality of the welding of guide rails directly determines the motion accuracy, operational stability, and service life of the equipment. In actual production, long-stroke guide rails need to be assembled by segmented splicing and welding, which places extremely high demands on the coaxiality of the two sections of the guide rail.

[0003] However, existing guide rail welding often uses a single-sided reference surface pushing and positioning method, which may result in a significant step difference on the other side of the positioning. Even if the step difference area is subsequently ground, it may still cause some jamming and shaking of the moving parts during operation.

[0004] Therefore, we propose a guide rail welding device. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a guide rail welding device that overcomes these deficiencies. It features a reasonable design, ease of use, and solves the technical problem that large single-sided step differences during existing guide rail welding can affect the operational stability of moving parts.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A guide rail welding device, characterized in that it includes a welding mechanism, a pair of clamping mechanisms, a pair of limiting mechanisms, a pair of guiding mechanisms, and a docking mechanism; A pair of clamping mechanisms are used to clamp a guide rail to be welded. The clamping direction of the pair of clamping mechanisms is perpendicular to the docking direction of the pair of clamping mechanisms. One of the clamping mechanisms is floatingly supported on the connecting frame along the clamping direction. A pair of limiting mechanisms are respectively set on a pair of clamping mechanisms, which are used to limit the length of the guide rail to be welded from the clamping mechanism; A pair of guide mechanisms are located on both sides of a pair of clamping mechanisms and in the docking direction of the pair of clamping mechanisms, and are used for coarse positioning of the guide rail to be welded. The docking mechanism includes a docking positioning structure, a docking guiding structure, and a docking drive unit. A pair of clamping mechanisms are positioned and engaged along the clamping direction through the docking positioning structure. The connecting frame is slidably mounted on the docking guiding structure and driven by the docking drive unit. The docking drive unit drives the connecting frame and one of the clamping mechanisms to move towards the other clamping mechanism to achieve docking of a guide rail to be welded. The welding mechanism is used to perform welding operations on a guide rail that needs to be welded.

[0007] Furthermore, the device includes a worktable with an assembly slot in the middle area. A pair of guide mechanisms are located on both sides of the assembly slot and on the worktable surface. A pair of clamping mechanisms are installed in the assembly slot. The clamping mechanism has a clamping head that extends upward from the assembly slot to hold the guide rail, and a support surface that supports the guide rail is flush with the worktable surface.

[0008] Furthermore, the connecting frame is provided with a pair of first guide posts extending along the clamping direction of the clamping mechanism, one of the clamping mechanisms being slidably supported on the pair of first guide posts, and the two ends of the first guide posts are respectively equipped with first springs that elastically press the clamping mechanism along the clamping direction of the clamping mechanism.

[0009] Furthermore, the clamping mechanism includes a clamping base, a clamping cover plate, a pair of clamping sliders, a pair of chucks, a drive frame, and a clamping drive unit; The clamping base has a guide groove at its upper part and a lower through groove at its bottom that communicates directly with the guide groove. The clamping cover plate covers the top of the clamping base and has an upper through groove that communicates directly with the guide groove. The width of the upper through groove is the same as the width of the lower through groove and less than the width of the guide groove. A pair of clamping sliders are slidably supported in the guide groove. Each clamping slider is equipped with a chuck, which extends upward through the upper through groove. The drive frame includes a pair of drive arms symmetrically distributed in a V shape. The drive arms pass through the lower through groove, the guide groove, the clamping sliders, and the upper through groove. The drive arms and the clamping sliders are engaged by inclined surfaces. A clamping drive unit is installed at the bottom of the drive frame, which drives the drive frame to translate vertically.

[0010] Furthermore, the middle area of ​​the clamping cover is provided with a pair of limiting ribs that are spaced apart along the clamping direction of the clamping mechanism.

[0011] Furthermore, the limiting mechanism includes a limiting plate and a limiting drive unit. The limiting plate is installed at the output end of the limiting drive unit. The limiting drive unit is capable of moving the limiting plate to and out of the opening of a pair of limiting ribs. The limiting drive unit is installed on the clamping cover plate of the clamping mechanism.

[0012] Furthermore, the docking guide structure includes docking rails, and docking rails are symmetrically installed on both sides of the assembly groove in the clamping direction of the clamping mechanism. The bottom plate of the connecting frame is slidably supported on the docking rails on both sides through guide grooves. The docking drive unit is installed on the lower part of the workbench, and the output end of the docking drive unit extends into the assembly groove and connects to the connecting frame.

[0013] Furthermore, the docking positioning structure includes a docking positioning block and a docking positioning groove. During the positioning process of the docking positioning block and the docking positioning groove through the engagement of the inclined surface or the conical surface, one of the clamping mechanisms floats and adjusts its position along the clamping direction.

[0014] Furthermore, a docking positioning block is installed in the middle part of the side wall of one of the clamping mechanisms facing the other clamping mechanism. The ends of the two side walls of the docking positioning block in the clamping direction of the clamping mechanism are provided with outer positioning inclined surfaces. The other clamping mechanism is provided with a docking positioning groove in the middle part of the side wall of one of the clamping mechanisms. The two inner side walls of the docking positioning groove are provided with inner positioning inclined surfaces that cooperate with the outer positioning inclined surfaces.

[0015] Furthermore, the docking positioning block is floatingly mounted on the clamping base, the clamping base has a stepped groove, the docking positioning block is slidably mounted in the stepped groove, the head of the docking positioning block extends out from the small-sized groove of the stepped groove, and the protruding step at the root of the docking positioning block is limited and matched with the stepped surface of the stepped groove. A fourth spring is provided between the root of the docking positioning block and the plug used for sealing the large-sized groove of the stepped groove, and the fourth spring elastically presses the docking positioning block outward. The docking positioning block includes a housing, a driving component, a push rod, a locking slider, and a locking tongue. The push rod and driving component are slidably installed inside the housing along the docking direction of a pair of clamping mechanisms. The push rod is fixed to the end of the driving component and can extend out of the housing. The locking slider and locking tongue are slidably installed inside the housing along the clamping direction of the clamping mechanisms. The locking tongue is installed on the outer wall of the locking slider and can extend out of the housing and into the locking hole of a small-sized groove. One outer wall at the root of the driving component engages with the inner wall of the locking slider via an inclined surface. A second spring is provided at the root of the driving component, which elastically presses the driving component outward. A third spring is fitted on the locking tongue, which elastically presses the locking slider inward. Without external force, the second spring can overcome the force of the third spring, pressing both the push rod and the locking tongue outward from the housing.

[0016] Furthermore, the guiding mechanism includes two rows of guide rollers spaced apart along the clamping direction of the clamping mechanism.

[0017] This invention provides a guide rail welding device with the following advantages: One of the pair of clamping mechanisms is a floating support, which, in conjunction with the docking positioning structure, allows the two guide rails clamped by the clamping mechanisms to automatically find their center line for alignment during docking. Even if there is a step difference in the width direction between the two guide rails, the system can distribute the step difference evenly to both sides of the joint through the floating displacement of one clamping mechanism, rather than concentrating it on one side. This results in a more uniform transition of the welded guide rails and a smaller step difference on one side. When the slider crosses the weld seam, specifically when passing through a weld seam with a step difference, the ball bearings (on the inclined side) inside the slider are forced to rise or fall. Although the motion states change and both have vertical velocity components, the direction and magnitude of the change are basically symmetrical and synchronous, eliminating torsional torque and maintaining a balanced force inside the slider. This significantly reduces jamming and vibration, and lowers off-center wear. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the first clamping mechanism in the released state in this invention; Figure 3 This is a schematic diagram of the first clamping mechanism in the clamping state in this invention; Figure 4 This is a cross-sectional schematic diagram of the first clamping mechanism in the released state in this invention; Figure 5 This is a schematic diagram of the second clamping mechanism in the released state in this invention; Figure 6 This is a schematic diagram of the structure of the limiting mechanism and the second clamping mechanism in this invention. Figure 7 This is a schematic diagram of the docking positioning block in this invention; Figure 8 This is an exploded structural diagram of the docking positioning block in this invention.

[0019] In the picture: 1. Welding mechanism; 2. Workbench; 21. Assembly slot; 3. Guide roller assembly; 41. First clamping mechanism; 42. Second clamping mechanism; 411. Clamping base; 4111, Guide groove; 4112. Underpass; 4113. Docking and positioning slot; 4113a. Internal positioning slope; 4114. Docking and positioning block; 4114a. External positioning inclined plane; 41141. Upper shell; 41142. Lower shell; 41143. Driving components; 41144, Second guide post; 41145. The second spring; 41146. Locking slider; 41147. Locking tongue; 41148. The third spring; 41149, Top rod; 412. Clamping cover plate; 4121. Upper through groove; 4122. Limiting rib; 413. Clamping the slider; 414. Clamp; 415. Drive frame; 4151. Drive arm; 416. Clamping drive unit; 4171, Angle plate; 4172. Base plate; 41721. Guide groove; 418. Connecting column; 421. First guide post; 422. The first spring; 51. Dock drive unit; 52. Docking tracks; 61. Limit plate; 62. Limit drive unit; 63. Rotating arm. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] See attached document Figure 1-5 A guide rail welding device includes a worktable 2, a welding mechanism 1, a pair of clamping mechanisms, a pair of guiding mechanisms, and a docking mechanism; The workbench 2 has an assembly slot 21 in the middle area of ​​the table plate. The two side walls and bottom wall of the assembly slot 21 can be provided with through operation holes as needed, so that the welding head of the welding mechanism can be inserted to perform welding operations. A pair of clamping mechanisms are installed in the assembly groove 21 and used to clamp a guide rail to be welded. The clamping direction of the pair of clamping mechanisms is perpendicular to the docking direction of the pair of clamping mechanisms. For easy distinction, one of the clamping mechanisms in the scheme is the second clamping mechanism 42, and the other clamping mechanism is the first clamping mechanism 41. The first clamping mechanism 41 is fixedly supported in the assembly groove 21, and the second clamping mechanism 42 is floatingly supported on the connecting frame along the clamping direction. The clamping head 414 of the clamping mechanism for clamping the guide rail extends upward from the assembly groove 21, and the supporting surface for supporting the guide rail is flush with the table surface of the workbench 2. That is, the upper end surface of the clamping cover plate 412 of the clamping mechanism is flush with the table surface of the workbench 2. A pair of limiting mechanisms are respectively set on a pair of clamping mechanisms, which are used to limit the length of the guide rail to be welded from the clamping mechanism, that is, the length of the guide rail from the clamping mechanism is fixed. A pair of guide mechanisms are respectively located on both sides of the assembly slot 21 and set on the table surface of the workbench 2. The pair of guide mechanisms are in the docking direction of the pair of clamping mechanisms and are used for rough positioning of the guide rail to be welded. The docking mechanism includes a docking positioning structure, a docking guide structure, and a docking drive unit 51. A pair of clamping mechanisms are positioned and engaged along the clamping direction through the docking positioning structure. The connecting frame is slidably mounted on the docking guide structure and driven by the docking drive unit 51. The docking drive unit drives the connecting frame and the second clamping mechanism 42 to move toward the first clamping mechanism 41 to achieve docking of a guide rail to be welded (the docking of a guide rail to be welded can be that one guide rail to be welded moves to fit against another guide rail to be welded, or it can be that one guide rail to be welded moves to be at a preset interval with another guide rail to be welded). Welding mechanism 1 is located on the side of workbench 2 and is used to perform welding operations on a guide rail to be welded (after docking). Welding mechanism 1 adopts a robotic arm welding robot, and there is at least one, preferably two.

[0022] In this embodiment, the connecting frame is provided with a pair of first guide posts 421 extending along the clamping direction of the clamping mechanism. The second clamping mechanism 42 is slidably supported on the pair of first guide posts 421. Each end of the first guide post 421 is fitted with a first spring 422 that elastically presses against the clamping mechanism along the clamping direction. The pair of first guide posts 421 restricts the degrees of freedom of the second clamping mechanism 42, ensuring that it can only move linearly along the clamping direction, preventing deflection during docking. The first springs 422 at both ends provide a restoring elastic force for the second clamping mechanism 42.

[0023] Reference Figure 2 , Figure 5The first clamping mechanism 41 and the second clamping mechanism 42 are both supported on independent connecting frames. The connecting frame consists of a base plate 4172 and a pair of corner plates 4171 fixed to both ends of the base plate 4172. The difference is that the first clamping mechanism 41 is fixedly connected to the corner plates 4171 of the connecting frame through connecting columns 418 and bolts. The base plate 4172 of the connecting frame (i.e. the base plate of the connecting frame connected to the first clamping mechanism 41) is fixedly connected to the bottom of the assembly groove. The second clamping mechanism 42 is slidably supported on a pair of first guide columns 421. The two ends of the pair of first guide columns 421 are respectively fixedly connected to the corner plates 4171 of the other connecting frame.

[0024] In this embodiment, the clamping mechanism includes a clamping base 411, a clamping cover plate 412, a pair of clamping sliders 413, a pair of chucks 414, a drive frame 415, and a clamping drive unit 416. The clamping base 411 has a guide groove 4111 on its upper part and a lower through groove 4112 communicating with the guide groove 4111 at its bottom. The clamping cover plate 412 covers the top of the clamping base 411. The clamping cover plate 412 has an upper through groove 4121 communicating with the guide groove 4111. The width of the upper through groove 4121 is the same as the width of the lower through groove 4112 but smaller than the width of the guide groove 4111 (to prevent the clamping sliders 413 from coming out). A pair of clamping sliders 413 are slidably supported in the guide groove 4111. Each clamping slider 413 is equipped with a chuck 414. The chuck 414 extends upward through the upper through groove 4121. The chuck 414 can position and press the inward portion of the guide rail through the square part on its surface. At the same time, care should be taken to avoid damaging the guide rail. The contact of the ball groove is described. The drive frame 415 includes a pair of drive arms 4151 symmetrically distributed in a V shape. The drive arms 4151 pass through the lower through groove, the guide groove 4111, the clamping slider 413 and the upper through groove 4121. The drive arms 4151 and the clamping slider 413 are engaged by inclined surfaces. A clamping drive unit 416 is installed at the bottom of the drive frame 415. The clamping drive unit 416 drives the drive frame 415 to move vertically. (A pair of clamping drive units 416 are symmetrically provided at both ends of the bottom plate of the drive frame 415. The clamping drive unit 416 is a cylinder. The cylinder body is fixed to the back of the bottom plate. Its piston rod passes through the bottom plate and is connected to the clamping base 411. The bottom plate 4172 of the connecting frame is provided with a through hole for the cylinder to pass through.) The V-shaped symmetrically distributed drive arms 4151, in conjunction with the inclined plane transmission, can ensure that the clamping sliders 413 and chucks 414 on both sides clamp inward synchronously, thus simultaneously clamping the guide rail to be welded.

[0025] In this embodiment, the middle region of the clamping cover plate 412 is provided with a pair of limiting ribs 4122 spaced apart along the clamping direction of the clamping mechanism. The guiding mechanism includes two rows of guide roller groups 3 spaced apart along the clamping direction of the clamping mechanism. The paired limiting ribs 4122 and the guide roller groups 3 are used for coarse positioning of the guide rail to be welded.

[0026] In this embodiment, the limiting mechanism includes a limiting plate 61 and a limiting drive unit 62. The limiting plate 61 is mounted on the output end of the limiting drive unit 62. The limiting drive unit 62 can move the limiting plate to and out of the opening of a pair of limiting ribs 4122. The limiting drive unit 62 is mounted on the clamping cover plate 412 of the clamping mechanism. The limiting drive unit 62 is preferably a rotary cylinder. A pair of rotary cylinders are respectively disposed on both sides of a pair of limiting ribs 4122. The two ends of the limiting plate 61 are respectively connected to the output ends of the rotary cylinders through rotating arms 63. A first limiting block can be added to the clamping cover plate 412 corresponding to the rotating arm. The first limiting block limits the rotation angle of the rotating arm, thereby ensuring that the limiting plate falls on the final position above the docking positioning block 4114. Preferably, the limiting mechanism can be further equipped with a mounting plate, a third guide post, and a cylinder. The two ends of the mounting plate are fixedly connected to a pair of third guide posts and a rotating arm, respectively. The limiting plate is arranged parallel to the inner side of the mounting plate, and its two ends are slidably supported on the two pairs of third guide posts. A cylinder is fixedly connected to the inner side of the mounting plate, and the output end of the cylinder is connected to the limiting plate. A second limiting block can be fixedly connected to the third guide post. After the limiting plate positions the guide rail to be welded, the rotating cylinder drives the rotating arm to flip the limiting plate outward, releasing the limiting of the guide rail to be welded. Before this process, the cylinder can be driven to pull the limiting plate outward to avoid interference between the limiting plate and the guide rail to be welded when the limiting plate flips outward. (See attached diagram) Figure 6 The docking positioning block 4114 extends outward relative to the limiting plate.

[0027] In this embodiment, the docking guide structure includes docking rails 52. The assembly groove 21 is symmetrically equipped with docking rails 52 on both sides of the clamping direction of the clamping mechanism. The bottom plate 4172 of the connecting frame is slidably supported on the docking rails 52 through guide grooves 41721 on both sides. The docking drive unit 51 is preferably an electric push rod. The docking drive unit 51 is installed on the lower part of the workbench 2. The output end of the docking drive unit 51 extends into the assembly groove 21 and is connected to the connecting frame.

[0028] In this embodiment, the docking positioning structure includes a docking positioning block 4114 and a docking positioning groove 4113. During the positioning process of the docking positioning block 4114 and the docking positioning groove 4113 through the engagement of inclined surfaces or conical surfaces, the second clamping mechanism 42 floats and adjusts its position along the clamping direction. Specifically, the docking positioning block 4114 is installed at the middle part of the side wall of the second clamping mechanism 42 facing the first clamping mechanism 41. The ends of the two side walls of the docking positioning block 4114 in the clamping direction of the clamping mechanism are provided with outer positioning inclined surfaces 4114a. The middle part of the side wall of the first clamping mechanism 41 facing the second clamping mechanism 42 is provided with a docking positioning groove 4113. The two inner side walls of the docking positioning groove 4113 are provided with inner positioning inclined surfaces 4113a that engage with the outer positioning inclined surfaces 4114a. Utilizing the wedge effect of the inclined surfaces or conical surfaces, when the two clamping mechanisms approach each other, the normal component force generated by the contact of the inclined surfaces will automatically push the floating side mechanism to fine-tune its position until the two sides are completely aligned.

[0029] As a further improvement, the docking positioning block 4114 is floatingly mounted on the clamping base 411. In some embodiments, the installation positions of the docking positioning groove 4113 and the docking positioning block 4114 can be interchanged. That is, the docking positioning block 4114 is set on the clamping base 411 of the first clamping mechanism 41, while the docking positioning groove 4113 is opened on the clamping base 411 of the second clamping mechanism 42, to avoid interference between the docking positioning block 4114 and the first guide post 421, or to increase the width of the clamping base 411. The clamping base 411 has a stepped groove. The head of the docking positioning block 4114 extends from the small-sized groove of the stepped groove, and the protruding step at the root of the docking positioning block 4114 is matched with the stepped surface of the stepped groove to prevent the docking positioning block 4114 from falling out. A fourth spring is provided between the root of the docking positioning block 4114 and the plug for sealing the large-sized groove of the stepped groove. The fourth spring elastically presses the docking positioning block 4114 outward. See Appendix Figure 7 , 8 The docking positioning block 4114 includes a housing (the housing is assembled from an upper housing 41141 and a lower housing 41142 and fixed by bolts), a driving member 41143, a push rod 41149, a locking slider 41146, and a locking tongue 41147. The push rod 41149 and the driving member 41143 are slidably installed inside the housing along the docking direction of a pair of clamping mechanisms. The push rod is fixed to the end of the driving member 41143 and can extend out of the housing. The locking slider 41146 and the locking tongue 41147 are slidably installed inside the housing along the clamping direction of the clamping mechanisms. The locking tongue 41147 is installed on the outer side wall of the locking slider 41146 and can extend out of the housing and into the locking hole of a small-sized groove (the small-sized groove of the stepped groove has a locking hole that mates with the locking tongue 41147). One outer side wall at the root of the driving member 41143 and the inner side wall of the locking slider 41146 are engaged by an inclined surface (e.g., Figure 8As shown at point A in the middle, in this embodiment, the driving member 41143 is T-shaped, and locking sliders 41146 are symmetrically provided on both sides of the root of the driving member 41143. A pair of second guide posts 41144 extending along the docking direction of a pair of clamping mechanisms are installed at the root of the driving member 41143. The second guide posts 41144 are slidably inserted into the housing and are externally sleeved with a second spring 41145. The second spring 41145 elastically presses the driving member 41143 outward. A third spring 41148 is sleeved on the locking tongue 41147. The third spring 41148 elastically presses the locking sliders 41146 inward. When no external force is applied, the second spring 41145 can overcome the force of the third spring 41148 and press the push rod 41149 and the locking tongue 41147 outward from the housing.

[0030] The working process of the device of the present invention is as follows.

[0031] S1, Material Loading and Pre-positioning Stage The operator or automated feeding mechanism places the two sections of guide rail to be welded on both sides of the assembly slot 21 of the workbench 2. Specifically, the main body of the guide rail to be welded is located between the two rows of guide roller groups 3 and supported on the table surface of the workbench 2. The part near its end is located between a pair of limiting ribs 4122 and supported on the upper end face of the clamping cover plate 412. The end to be welded extends out of the clamping cover plate 412 and abuts against the limiting plate 61.

[0032] S2, Synchronous Clamping and Initial Fixation Stage The clamping drive unit 416 drives the drive frame 415 to move upward, and a pair of V-shaped drive arms 4151 simultaneously push the clamping sliders 413 on both sides and the chucks 414 fixed on the clamping sliders 413 to move inward in a synchronous manner, clamping the guide rail.

[0033] S3, Docking and Floating Positioning Phase When the docking drive unit 51 is activated, it pushes the connecting frame and the second clamping mechanism 42 to move along the docking track 52 toward the first clamping mechanism 41. The docking positioning block 4114 is inserted into the docking positioning groove 4113. The two cooperate through the outer positioning inclined surface and the inner positioning inclined surface, so that the second clamping mechanism 42 overcomes the force of the first spring 422 and adjusts along the first guide post 421. This process makes the two clamped guide rails automatically aligned with the center line, and the width difference of the two guide rails is evenly distributed to both sides of the docking seam, thereby eliminating the obvious unilateral difference.

[0034] S4, Adjustment stage of welding gap between guide rails When the docking positioning block 4114 is inserted into the docking positioning groove 4113 until the outer positioning slopes on both sides are in contact with the inner positioning slopes on both sides of the latter, the push rod is pushed inward by the bottom of the docking positioning groove 4113. At the same time, the locking tongue 41147 is retracted into the housing of the docking positioning block 4114 under the action of the third spring 41148, so that the docking positioning block 4114 is unlocked and can be further compressed and retracted into the clamping base 411, so as to adjust the welding gap between the two clamped guide rails after they are automatically aligned with the center line.

[0035] S5, Welding Operation The welding robot performs welding operations along the weld seam trajectory. Two welding mechanisms 1 can be set up as needed to weld simultaneously from both sides of the weld seam. Before welding operations, the limiting plate 61 must be flipped outwards.

[0036] S6, Reset and Unloading Stage After welding is completed, the drive frame 415 of the first clamping mechanism 41 and the second clamping mechanism 42 retracts downward, the clamping slider 413 and the chuck 414 move outward, releasing the clamp on the guide rail. The operator or the unloading mechanism can then remove the welded long guide rail, and the second clamping mechanism 42 resets.

[0037] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A guide rail welding device, characterized in that: It includes a welding mechanism, a pair of clamping mechanisms, a pair of limiting mechanisms, a pair of guiding mechanisms, and a docking mechanism; A pair of clamping mechanisms are used to clamp a guide rail to be welded. The clamping direction of the pair of clamping mechanisms is perpendicular to the docking direction of the pair of clamping mechanisms. One of the clamping mechanisms is floatingly supported on the connecting frame along the clamping direction. A pair of limiting mechanisms are respectively set on a pair of clamping mechanisms, which are used to limit the length of the guide rail to be welded from the clamping mechanism; A pair of guiding mechanisms are located on both sides of a pair of clamping mechanisms and in the docking direction of the pair of clamping mechanisms, and are used for coarse positioning of the guide rail to be welded. The docking mechanism includes a docking positioning structure, a docking guiding structure, and a docking drive unit. A pair of clamping mechanisms are positioned and engaged along the clamping direction through the docking positioning structure. The connecting frame is slidably mounted on the docking guiding structure and driven by the docking drive unit. The docking drive unit drives the connecting frame and one of the clamping mechanisms to move towards the other clamping mechanism to achieve docking of a guide rail to be welded. The welding mechanism is used to perform welding operations on a guide rail to be welded; The device includes a workbench with an assembly slot in the middle area. A pair of guide mechanisms are located on both sides of the assembly slot and on the workbench surface. A pair of clamping mechanisms are installed in the assembly slot. The clamping mechanism has a clamping head for holding the guide rail that extends upward out of the assembly slot and a supporting surface for supporting the guide rail that is flush with the workbench surface. The clamping mechanism includes a clamping base, a clamping cover plate, a pair of clamping sliders, a pair of chucks, a drive frame, and a clamping drive unit; The clamping base has a guide groove at its upper part and a lower through groove at its bottom that communicates directly with the guide groove. The clamping cover plate covers the top of the clamping base and has an upper through groove that communicates directly with the guide groove. The width of the upper through groove is the same as the width of the lower through groove and less than the width of the guide groove. A pair of clamping sliders are slidably supported in the guide groove. Each clamping slider is equipped with a chuck, which extends upward through the upper through groove. The drive frame includes a pair of drive arms symmetrically distributed in a V-shape. The drive arms pass through the lower through groove, the guide groove, the clamping sliders, and the upper through groove. The drive arms and the clamping sliders are engaged by inclined surfaces. A clamping drive unit is installed at the bottom of the drive frame, which drives the drive frame to translate vertically. The docking positioning structure includes a docking positioning block and a docking positioning groove. During the positioning process of the docking positioning block and the docking positioning groove through the engagement of the inclined surface or the conical surface, one of the clamping mechanisms floats and adjusts its position along the clamping direction.

2. The guide rail welding device as described in claim 1, characterized in that: The connecting frame is provided with a pair of first guide posts extending along the clamping direction of the clamping mechanism, and one of the clamping mechanisms is slidably supported on the pair of first guide posts. The two ends of the first guide posts are respectively equipped with first springs that elastically press the clamping mechanism along the clamping direction of the clamping mechanism.

3. The guide rail welding device as described in claim 1, characterized in that: The middle area of ​​the clamping cover plate is provided with a pair of limiting ribs that are spaced apart along the clamping direction of the clamping mechanism. The guiding mechanism includes two rows of guide rollers spaced apart along the clamping direction of the clamping mechanism.

4. The guide rail welding device as described in claim 3, characterized in that: The limiting mechanism includes a limiting plate and a limiting drive unit. The limiting plate is installed at the output end of the limiting drive unit. The limiting drive unit can move the limiting plate to and out of the opening of a pair of limiting ribs. The limiting drive unit is installed on the clamping cover plate of the clamping mechanism.

5. The guide rail welding device as described in claim 1, characterized in that: The docking guide structure includes docking rails. The assembly slot is symmetrically equipped with docking rails on both sides of the clamping direction of the clamping mechanism. The bottom plate of the connecting frame is slidably supported on the docking rails on both sides through guide grooves. The docking drive unit is installed on the lower part of the workbench. The output end of the docking drive unit extends into the assembly slot and connects to the connecting frame.

6. The guide rail welding device as described in claim 1, characterized in that: One of the clamping mechanisms is equipped with a docking positioning block at the middle part of the side wall facing the other clamping mechanism. The ends of the two side walls of the docking positioning block in the clamping direction of the clamping mechanism are provided with outer positioning inclined surfaces. The other clamping mechanism is provided with a docking positioning groove at the middle part of the side wall facing the one of the clamping mechanisms. The two inner side walls of the docking positioning groove are provided with inner positioning inclined surfaces that cooperate with the outer positioning inclined surfaces.

7. The guide rail welding device as described in claim 6, characterized in that: The docking positioning block is floatingly installed on the clamping base. The clamping base has a stepped groove. The docking positioning block is slidably installed in the stepped groove. The head of the docking positioning block extends out from the small-sized groove of the stepped groove. The protruding step at the root of the docking positioning block is matched with the stepped surface of the stepped groove. A fourth spring is provided between the root of the docking positioning block and the plug used for sealing the large-sized groove of the stepped groove. The fourth spring elastically presses the docking positioning block outward. The docking positioning block includes a housing, a driving component, a push rod, a locking slider, and a locking tongue. The push rod and driving component are slidably installed inside the housing along the docking direction of a pair of clamping mechanisms. The push rod is fixed to the end of the driving component and can extend out of the housing. The locking slider and locking tongue are slidably installed inside the housing along the clamping direction of the clamping mechanisms. The locking tongue is installed on the outer wall of the locking slider and can extend out of the housing and into the locking hole of a small-sized groove. One outer wall at the root of the driving component engages with the inner wall of the locking slider via an inclined surface. A second spring is provided at the root of the driving component, which elastically presses the driving component outward. A third spring is fitted on the locking tongue, which elastically presses the locking slider inward. Without external force, the second spring can overcome the force of the third spring, pressing both the push rod and the locking tongue outward from the housing.

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