Lock pin welding device for locker and working method of lock pin welding device

Abstract

The invention discloses a lock pin welding device and a working method thereof.The lock pin welding device is used for welding a lock pin and a lock pin handle and comprises a workbench, a driving table, a clamping rod, a manual clamp and a welding gun assembly, the driving table, the clamping rod, the manual clamp and the welding gun assembly are arranged on the workbench, and the driving table is arranged at one end of a top plate of the workbench; a horizontal output shaft of the driving table is fixedly connected with a three-jaw chuck; the root of the clamping rod is clamped on the three-jaw chuck, and the lock pin is coaxially clamped at the cantilever end of the clamping rod and is pressed through the manual clamp; the lock pin handle is preassembled at the end of the lock pin shaft, and the two welding gun assemblies are arranged on the two sides of the lock pin handle correspondingly and machine an inner circumferential welding seam and an outer circumferential welding seam correspondingly. Two circumferential welds of the lock pin of the locker can be welded at the same time, and the welding efficiency and quality are improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a locking pin welding device of a lock and a working method thereof. Background Art

[0002] Open wagons are widely used in the field of train and truck transportation. Multiple side doors are opened on the side walls of the open wagons to facilitate the rapid unloading of bulk goods. During transportation, locks are required to effectively close the side doors of the open wagons to prevent them from opening accidentally. The invention patent with publication number CN 118422959 A discloses a secondary locking system for the lower side door of a universal open car, including a lower side door panel, a lower side door hinge and a buckle assembly, and also includes a secondary anti-opening device, the secondary anti-opening device includes a lock seat, a lock pin and a lock iron, the lock seat is symmetrical on the left and right, and the left and right side panels extend forward to form a lock iron placement groove, the lock iron is respectively provided with a lifting and weight reduction hole and a lock iron installation hole on the upper and lower sides, the lock pin horizontally passes through the lock iron installation hole and the left and right side panels of the lock seat so as to install the lock iron in the lock iron placement groove, the lock pin includes a lock pin rotating shaft and a lock pin handle installed at the left end of the lock pin rotating shaft in an initially vertical state, the lock pin rotating shaft includes a thick diameter section with a diameter larger than the hole diameter of the lock iron installation hole and a thin diameter section with a diameter adapted to the lock iron installation hole, the thick diameter section is symmetrically provided with planes on the upper and lower sides and the distance between the planes is smaller than the diameter of the thin diameter section, and the inner side surface of the lock iron installation hole is symmetrically provided with limiting protrusions on the front and rear sides, which has the advantages of saving time and labor, reducing costs, providing double guarantees for unlocking, strict unlocking conditions, and good locking effect.

[0003] The lock pin structures of the above patent documents and the existing secondary anti-opening devices are similar and are both used to lock the position of the lock iron. Figure 1 The figure shows the assembly diagram of the secondary anti-opening device of the lock, which includes a lock pin assembly, a lock seat 6' and a lock iron 7'. The lock pin assembly connects the lock iron 7' ​​to the lock seat 6' and the insertion end is axially limited by welding a baffle 5'. Figure 2 As shown, in the process of producing the lock, the applicant designed the lock as an assembly of a lock pin 1' and a lock pin handle 2' in order to reduce the production difficulty and cost of the lock pin assembly. The lock pin 1' is cast by cast steel, and the lock pin handle 2' is formed by plasma cutting of steel plates, and then the two are welded together. It is necessary to complete the welding of the inner ring weld 3' and the outer ring weld 4' on both sides of the lock pin handle 2'. If manual welding is used, it is difficult to ensure the welding quality and welding efficiency.

[0004] In order to overcome the above problems, a lock pin welding device and a working method thereof are needed. Summary of the invention

[0005] The object of the present invention is to provide a locking pin welding device for a closure and a working method thereof, which can weld two circumferential welds on the locking pin of the closure at the same time, thereby improving welding efficiency and quality.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The present invention provides a locking pin welding device for a lock, which is used to weld a locking pin and a locking pin handle, and comprises a workbench and a driving platform, a clamping rod, a manual clamp and a welding gun assembly arranged on the workbench, wherein the driving platform is arranged at one end of the top plate of the workbench, and the horizontal output shaft of the driving platform is fixedly connected with a three-jaw chuck; the root of the clamping rod is clamped on the three-jaw chuck, and the cantilever end of the clamping rod is coaxially clamped with the locking pin and is tightened by the manual clamp; the locking pin handle is pre-assembled on the locking pin shaft end, and two groups of the welding gun assemblies are respectively arranged on both sides of the locking pin handle and respectively process the inner ring weld and the outer ring weld.

[0008] Furthermore, the driving platform includes a motor and a reducer, the motor outputs power to the reducer, and the three-jaw chuck is installed on the output shaft of the reducer.

[0009] Furthermore, a semicircular table is provided at the end of the clamping rod, a clearance groove is opened on the top surface of the semicircular table, and a positioning table is provided in the middle of the clearance groove; the locking pin is placed flat in the clearance groove and the locking pin concave table is inserted into the positioning table; the manual clamp presses the outer cylindrical top wall of the locking pin.

[0010] Furthermore, a mounting plate is welded on the outer wall of the clamping rod, and the top surface of the mounting plate is parallel to the top surface of the semicircular table; the base of the manual clamp is mounted on the top surface of the mounting plate.

[0011] Furthermore, the welding gun assembly includes a welding gun head, a pressure plate clamp, a support frame and a linear drive combination, the welding gun head is installed on the upper part of the support frame through the pressure plate clamp, the tail of the welding gun head is connected to the main unit of the two-protection welding machine through a power cord and a welding wire, and the wire outlet end of the welding gun head is aligned with the inner ring weld or the outer ring weld; the linear drive combination is arranged at the bottom of the support frame and can drive the welding gun head to enter or exit the welding position.

[0012] Furthermore, the pressure plate clamp is installed on the support frame by bolts, and a waist-shaped hole for installing the bolt is opened on the upper part of the support frame, and the waist-shaped hole is arranged along the vertical direction.

[0013] Furthermore, the linear drive combination includes a slider, a base and a cylinder, the base is mounted on the top plate of the workbench by bolts, a linear guide is installed on the base, and the slider is slidably connected to the linear guide; the cylinder is mounted on the rear end of the base by a bracket, the piston rod of the cylinder is parallel to the linear guide and the end of the piston rod is connected to the vertical plate at the rear end of the slider.

[0014] Furthermore, it also includes a discharge cylinder, which is supported above and behind the clamping rod through a discharge bracket. The discharge cylinder is a double piston rod cylinder, and a push plate is fixedly connected to the end of the piston rod; the push plate can push the distal end of the locking pin handle.

[0015] Furthermore, it also includes an inductive sensor, which is installed on the unloading bracket and can transmit the remote position signal of the locking pin handle to the equipment controller.

[0016] The present invention also discloses a working method of a locking device lock pin welding device, which uses any one of the above locking device lock pin welding devices to weld a locking pin and a locking pin handle.

[0017] Compared with the prior art, the beneficial technical effects of the present invention are:

[0018] The lock pin welding device of the present invention can rotate along the horizontal axis under the drive of the driving platform through the horizontal clamping rod, thereby driving the inner ring weld and the outer ring weld to rotate, and the two sets of welding gun assemblies synchronously complete the welding of the ring weld; the lock pin is pressed by a manual clamp to prevent the lock pin from loosening and shifting during the welding process. Compared with manual welding, the lock pin welding device of the present invention can weld two ring welds on the lock pin of the lock at the same time, thereby improving the welding efficiency and quality.

[0019] In addition, by providing a clearance groove on the top surface of the semicircular table to install the locking pin, the top is open, which is convenient for installing, placing and removing the workpiece; the locking pin concave is inserted into the positioning table for matching positioning, so that the locking pin can be quickly installed in place. By defining the initial position of the locking rod, it is ensured that when the locking pin is installed, the locking pin handle is vertically downward, which also ensures the vertical relationship between the locking pin concave and the vertical axis of the locking pin handle. The welding gun head is supported by the pressure plate clamp and the support frame, and the welding height is reached. The pressure plate clamp can adjust the swing angle of the welding gun head to stably support and assist in completing the welding; through the setting of the linear drive group, the switching of the welding gun head into or out of the welding position can be realized, which is convenient for loading and removing. The slider guided by the linear guide rail is driven by the cylinder to realize the conversion of the front and rear positions, and the structure is stable and reliable, which is easy to implement. Through the setting of the limit rod and the limit block, the adjustment of the cylinder top stroke can be realized, which is convenient for controlling the welding wire head and the weld spacing adjustment when the welding gun head enters the welding position. Through the setting of the unloading cylinder, after the welding is completed, the temperature of the workpiece is high, in order to prevent burns to the operator. After the clamping rod rotates to leave the initial position, the unloading cylinder pushes out, and the push plate pushes the far end of the lock pin handle, so that the workpiece is released from the semicircular table and falls to the top plate of the workbench by itself. It can be collected after cooling. By adding an inductive sensor to collect the far end position signal of the lock pin handle, it is convenient to confirm whether the clamping rod is in the initial position. The inductive sensor installed through the waist hole can adjust the installation height position of the inductive sensor.

[0020] The working method of the lock pin welding device of the present invention rotates the workpiece by a horizontal axis, and two groups of welding gun assemblies are welded simultaneously, so that the welding of the inner ring weld and the outer ring weld is completed synchronously, the welding is symmetrical, the welding deformation is small, and the welding quality is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the open car lock;

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the lock pin of the lock;

[0024] Figure 3 This is a schematic diagram of the main structure of the lock pin welding device of the locker of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the lock pin welding device of the locker of the present invention from a top view;

[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of the front end of the clamping rod in the present invention.

[0027] Description of reference numerals: 1', lock pin; 101', lock pin concave platform; 2', lock pin handle; 3', outer ring weld; 4', inner ring weld; 5', baffle; 6', lock seat; 7', lock iron;

[0028] 1. Workbench; 2. Drive table; 201. Three-jaw chuck; 3. Clamping rod; 301. Semicircular table; 302. Make way groove; 303. Positioning table; 304. Mounting plate; 4. Manual clamp; 5. Welding gun assembly; 501. Welding gun head; 502. Pressure plate clamp; 503. Support frame; 504. Slider; 505. Base; 506. Cylinder; 507. Limit rod; 6. Unloading cylinder; 601. Unloading bracket plate; 7. Induction sensor. DETAILED DESCRIPTION

[0029] The core of the present invention is to provide a locking pin welding device for a locker and a working method thereof, which can simultaneously weld two circumferential welds on the locking pin of the locker, thereby improving welding efficiency and quality.

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] With reference to the accompanying drawings, Figure 1 It is a schematic diagram of the three-dimensional structure of the open car lock; Figure 2 It is a schematic diagram of the three-dimensional structure of the lock pin of the lock; Figure 3 This is a schematic diagram of the main structure of the lock pin welding device of the locker of the present invention; Figure 4 It is a schematic diagram of the structure of the lock pin welding device of the locker of the present invention from a top view; Figure 5 It is a schematic diagram of the three-dimensional structure of the front end of the clamping rod in the present invention.

[0033] In a specific embodiment, Figures 1 to 5 As shown, as explained in the background technology, the lock pin welding device of the present invention is used to weld the lock pin 1' and the lock pin handle 2'. The lock pin welding device of the present invention comprises a workbench 1 and a drive table 2, a clamping rod 3, a manual clamp 4 and a welding gun assembly 5 arranged on the workbench 1. The drive table 2 is installed at one end of the top plate of the workbench 1, and the horizontal output shaft of the drive table 2 is fixedly connected with a three-jaw chuck 201. The three-jaw chuck 201 here is consistent with the structure on the lathe, and can center and clamp the cylinder. The clamping rod 3 is made of round steel, and the root of the clamping rod 3 is clamped on the three-jaw chuck 201. The cantilever end of the clamping rod 3 is coaxially clamped with the lock pin 1' and is pressed by the manual clamp 4. The lock pin handle 2' is pre-assembled on the shaft end of the lock pin 1', and two sets of welding gun assemblies 5 are respectively arranged on the left and right sides of the lock pin handle 2' and process the inner ring weld 4' and the outer ring weld 3' respectively. The two welding gun assemblies 5 correspond to two two-way welding machine hosts, and the two-way welding machine hosts are arranged in the workbench 1.

[0034] The clamping rod 3 for horizontal clamping can rotate along the horizontal axis under the drive of the driving platform 2, thereby driving the inner ring weld 4' and the outer ring weld 3' to rotate, and the two sets of welding gun assemblies 5 synchronously complete the welding of the ring welds; the locking pin 1' is pressed by the manual clamp 4 to prevent the locking pin 1' from loosening and shifting during the welding process. Compared with manual welding, the locking pin welding device of the locker of the present invention can weld two ring welds on the locking pin of the locker at the same time, thereby improving the welding efficiency and quality.

[0035] In a specific embodiment of the present invention, the driving platform 2 includes a motor and a reducer, the motor outputs power to the reducer, and the output shaft of the reducer is equipped with a three-jaw chuck 201. The motor is a servo motor, which is convenient for controlling the output speed and rotation direction.

[0036] Obviously, the driving platform 2 can also adopt a rack-driven gear mode, with the main shaft of the gear as the mounting axis of the three-jaw chuck 201, and a hydraulic cylinder drives the rack to reciprocate linearly, thereby realizing the forward and reverse rotation of the three-jaw chuck 201. Similar simple deformation and replacement structures all fall within the protection scope of the present invention.

[0037] In a specific embodiment of the present invention, Figures 3 to 5 As shown, a semicircular platform 301 is provided at the end of the clamping rod 3, a clearance groove 302 is provided on the top surface of the semicircular platform 301, and a positioning platform 303 is provided in the middle of the clearance groove 302. The top surface of the semicircular platform 301 is horizontally upward and is defined as the initial position of the rotation angle of the clamping rod 3, and the workpiece is clamped in this initial position. The locking pin 1' is placed flat in the clearance groove 302, and the locking pin concave platform 101' is clamped on the positioning platform 303 to ensure that the locking pin 1' is coaxially arranged with the clamping rod 3. The manual clamp 4 is pressed against the outer cylindrical top wall of the locking pin 1'.

[0038] Specifically, if Figure 5 As shown, a mounting plate 304 is welded on the outer wall of the clamping rod 3, and the top surface of the mounting plate 304 is parallel to the top surface of the semicircular table 301. The manual clamp 4 is a purchased small hardware woodworking clamp, and the base of the manual clamp 4 is installed on the top surface of the mounting plate 304.

[0039] The lock pin 1' is installed by providing a clearance groove 302 on the top surface of the semicircular platform 301, and the top is open, which is convenient for installing and removing workpieces; the lock pin concave platform 101' is inserted into the positioning platform 303 for matching positioning, so that the lock pin 1' can be quickly installed in place. By defining the initial position of the locking rod 3, it is ensured that when the lock pin 1' is installed, the lock pin handle 2' is vertically downward, which also ensures the vertical relationship between the vertical axis of the lock pin concave platform 101' and the lock pin handle 2'.

[0040] In a specific embodiment of the present invention, Figure 3 and Figure 4 As shown, the welding gun assembly 5 includes a welding gun head 501, a pressure plate clamp 502, a support frame 503 and a linear drive assembly. The welding gun head 501 is installed on the upper part of the support frame 503 through the pressure plate clamp 502, and the tail of the welding gun head 501 is connected to the main machine of the two-protection welding machine through a power cord and a welding wire. The wire outlet end of the welding gun head 501 is aligned with the inner ring weld 4' or the outer ring weld 3'. The linear drive assembly is arranged at the bottom of the support frame 503 and can drive the welding gun head 501 to enter or exit the welding position.

[0041] Specifically, if Figure 3 As shown, the pressure plate clamp 502 is installed on the support frame 503 by bolts, and a waist-shaped hole for installing the bolts is opened on the upper part of the support frame 503, and the waist-shaped hole is arranged along the vertical direction.

[0042] Specifically, if Figure 3 and Figure 4 As shown, the linear drive assembly includes a slider 504, a base 505 and a cylinder 506. The base 505 is mounted on the top plate of the workbench 1 by bolts, a linear guide rail is mounted on the base 505, and the slider 504 is slidably connected to the linear guide rail. The cylinder 506 is mounted on the rear end of the base 505 by a bracket, and the piston rod of the cylinder 506 is parallel to the linear guide rail and the end of the piston rod is connected to the vertical plate at the rear of the slider 504.

[0043] Specifically, if Figure 3 and Figure 4 As shown, a limit rod 507 is provided at the tail of the cylinder 506 , the limit rod 507 is fixedly coaxially connected with the piston rod, and a limit block that can be moved forward and backward and adjusted is installed on the limit rod 507 .

[0044] The welding gun head 501 is supported by the pressure plate clamp 502 and the support frame 503, and the welding height is reached. The pressure plate clamp 502 can adjust the swing angle of the welding gun head 501 to stably support and assist in completing the welding; through the setting of the linear drive group, the welding gun head 501 can be switched between entering or exiting the welding position, which is convenient for loading and unloading. The slider 504 guided by the linear guide is driven by the cylinder 506 to realize the conversion of the front and rear positions. The structure is stable and reliable, and easy to implement. Through the setting of the limit rod 507 and the limit block, the ejection stroke of the cylinder 506 can be adjusted, which is convenient for controlling the welding wire head and the weld spacing adjustment when the welding gun head 501 enters the welding position.

[0045] In a specific embodiment of the present invention, Figure 3 and Figure 4 As shown, the lock pin welding device of the present invention further comprises a discharge cylinder 6, which is supported above and behind the clamping rod 3 by a discharge bracket 601, and is a double piston rod cylinder, and the ends of the two piston rods are fixedly connected with a push plate, which can push the far end of the lock pin handle 2'.

[0046] Through the setting of the unloading cylinder 6, after the welding is completed, the temperature of the workpiece is relatively high, in order to prevent the operator from being scalded. After the clamping rod 3 rotates to 180 degrees away from the initial position, the unloading cylinder 6 is pushed out, and the push plate pushes the far end of the lock pin handle 2', so that the workpiece is disengaged from the semicircular table 301 and falls onto the top plate of the workbench 1 by itself, and can be collected after cooling.

[0047] In a specific embodiment of the present invention, Figure 3 As shown, the lock pin welding device of the present invention further comprises an inductive sensor 7, which is mounted on the unloading bracket 601 and can transmit the far end position signal of the lock pin handle 2' to the device controller. The inductive sensor 7 is an infrared proximity switch.

[0048] Specifically, a waist-shaped hole in a vertical direction is opened on the unloading bracket 601, and the induction sensor 7 is installed by passing through the waist-shaped hole and clamping the two sides thereof with large lock nuts.

[0049] By adding the inductive sensor 7 to collect the position signal of the far end of the locking pin handle 2', it is convenient to confirm whether the clamping rod 3 is in the initial position. The inductive sensor 7 installed through the waist-shaped hole can adjust the installation height position of the inductive sensor 7.

[0050] The working process of the lock pin welding device of the lock of the present invention is as follows: after the equipment is turned on and initialized, the clamping rod 3 is driven to rotate by the driving platform 2 and stops at the initial position with the top surface of the semicircular table 301 facing upward horizontally. The operator manually places the lock pin 1' into the clearance groove 302, and pays attention to the lock pin concave platform 101' being inserted into the positioning platform 303, and pulls the manual clamp 4, and the working end of the manual clamp 4 is pressed against the top surface of the outer cylindrical wall of the lock pin 1'. The top hole of the lock pin handle 2' is mounted on the outer end of the lock pin 1', and the axial direction is in place. At the same time, pay attention to the vertical downward axis of the lock pin handle 2'. The induction sensor 7 can collect the remote signal of the lock pin handle 2' and feed it back to the equipment controller. Press the start button on the operation panel, the cylinder 506 is ejected, and the slider 504 is pushed forward along the linear guide rail, driving the welding gun head 501 to enter the welding position, and the welding wire head is close to the weld. The main engine of the two-protection welding machine is started, the welding gun head 501 ignites and enters the welding state, the driving platform 2 drives the clamping rod 3 to rotate at the set speed, and the two sets of welding gun assemblies 5 gradually complete the welding of the inner ring weld 4' and the outer ring weld 3'. When the induction sensor 7 collects the far-end signal of the locking pin handle 2' again, it is fed back to the equipment controller, and the controller controls the cylinder 506 to retract, driving the welding gun head 501 to exit the welding position. Manually open the manual clamp 4, and operate the button to make the driving platform 2 continue to rotate the clamping rod 3 to 180 degrees. At this time, the top surface of the semicircular table 301 faces downward, and the unloading cylinder 6 is pushed out. The push plate pushes the far end of the locking pin handle 2', so that the workpiece is detached from the semicircular table 301 and falls onto the top plate of the workbench 1 by itself. It can be collected after cooling. Operate the button to make the clamping rod 3 re-enter the initial position, clamp the locking pin 1' and the locking pin handle 2' again, and start the next welding.

[0051] In summary, the lock pin welding device of the lock of the present invention can rotate along the horizontal axis under the drive of the driving platform 2 through the horizontal clamping rod 3, thereby driving the inner ring weld 4' and the outer ring weld 3' to rotate, and the two sets of welding gun assemblies 5 synchronously complete the welding of the ring weld; the manual clamp 4 presses the lock pin 1' to prevent the lock pin 1' from loosening and shifting during the welding process. Compared with manual welding, the lock pin welding device of the present invention can weld two ring welds on the lock pin of the lock at the same time, thereby improving the welding efficiency and quality. In addition, by providing a clearance groove 302 on the top surface of the semicircular table 301 to clamp the lock pin 1', the top is open, which is convenient for installing and removing the workpiece; the lock pin concave platform 101' is clamped into the positioning platform 303 for matching positioning, and the lock pin 1' can be quickly clamped in place. By defining the initial position of the clamping rod 3, it is ensured that when the lock pin 1' is clamped, the lock pin handle 2' is vertically downward, which also ensures the vertical relationship between the lock pin concave platform 101' and the lock pin handle 2' vertical axis. The welding gun head 501 is supported by the pressure plate clamp 502 and the support frame 503, and the welding height is reached. The pressure plate clamp 502 can adjust the swing angle of the welding gun head 501 to stably support and assist in completing the welding; through the setting of the linear drive group, the welding gun head 501 can be switched between entering or exiting the welding position, which is convenient for loading and unloading. The slider 504 guided by the linear guide is driven by the cylinder 506 to realize the conversion of the front and rear positions. The structure is stable and reliable, and easy to implement. Through the setting of the limit rod 507 and the limit block, the adjustment of the ejection stroke of the cylinder 506 can be realized, which is convenient for controlling the welding wire head and the weld spacing adjustment when the welding gun head 501 enters the welding position. Through the setting of the unloading cylinder 6, after the welding is completed, the temperature of the workpiece is relatively high, in order to prevent burns to the operating personnel. After the clamping rod 3 rotates 180 degrees away from the initial position, the unloading cylinder 6 is pushed out, and the push plate pushes the far end of the locking pin handle 2', so that the workpiece is released from the semicircular table 301 and falls to the top plate of the workbench 1 by itself, and can be collected after cooling. By adding an inductive sensor 7 to collect the far end position signal of the locking pin handle 2', it is convenient to confirm whether the clamping rod 3 is in the initial position. The inductive sensor 7 installed through the waist-shaped hole can adjust the installation height position of the inductive sensor 7.

[0052] The present invention also discloses a working method of a locking device lock pin welding device, and uses any one of the locking device lock pin welding devices to weld a locking pin 1' and a locking pin handle 2'.

[0053] By rotating the workpiece along a horizontal axis, two welding gun assemblies 5 are welded simultaneously, and the welding of the inner ring weld 4' and the outer ring weld 3' is completed synchronously, with symmetrical welding, small welding deformation and high welding quality.

[0054] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0055] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A locking pin welding device for a lock, for welding a locking pin (1') and a locking pin handle (2'), characterized in that: The invention comprises a workbench (1), a driving platform (2), a clamping rod (3), a manual clamp (4) and a welding gun assembly (5) arranged on the workbench (1); the driving platform (2) is arranged at one end of the top plate of the workbench (1); the horizontal output shaft of the driving platform (2) is fixedly connected to a three-jaw chuck (201); the root of the clamping rod (3) is clamped on the three-jaw chuck (201); the cantilever end of the clamping rod (3) is coaxially clamped on the locking pin (1') and is pressed by the manual clamp (4); the locking pin handle (2') is pre-assembled on the axial end of the locking pin (1'); two groups of welding gun assemblies (5) are respectively arranged on both sides of the locking pin handle (2') and respectively process the inner ring weld (4') and the outer ring weld (3').

2. The lock pin welding device of claim 1, characterized in that: The driving platform (2) comprises a motor and a reducer, the motor outputs power to the reducer, and the three-jaw chuck (201) is mounted on the output shaft of the reducer.

3. The lock pin welding device of claim 1, characterized in that: A semicircular table (301) is provided at the end of the clamping rod (3), a clearance groove (302) is provided on the top surface of the semicircular table (301), and a positioning table (303) is provided in the middle of the clearance groove (302); the locking pin (1') is placed flat in the clearance groove (302) and the locking pin recess (101') is clamped on the positioning table (303); the manual clamp (4) presses the outer cylindrical top wall of the locking pin (1').

4. The lock pin welding device of claim 3, characterized in that: A mounting plate (304) is welded on the outer wall of the clamping rod (3), and the top surface of the mounting plate (304) is parallel to the top surface of the semicircular table (301); the base of the manual clamp (4) is mounted on the top surface of the mounting plate (304).

5. The lock pin welding device of claim 1, characterized in that: The welding gun assembly (5) comprises a welding gun head (501), a pressure plate clamp (502), a support frame (503) and a linear drive assembly; the welding gun head (501) is mounted on the upper part of the support frame (503) via the pressure plate clamp (502); the tail of the welding gun head (501) is connected to the main machine of the two-protection welding machine via a power cord and a welding wire; the wire outlet end of the welding gun head (501) is aligned with the inner ring weld (4') or the outer ring weld (3'); the linear drive assembly is arranged at the bottom of the support frame (503) and can drive the welding gun head (501) to enter or exit a welding position.

6. The lock pin welding device of claim 5, characterized in that: The pressure plate clamp (502) is mounted on the support frame (503) by means of bolts. A waist-shaped hole for mounting the bolt is provided on the upper portion of the support frame (503), and the waist-shaped hole is arranged along the vertical direction.

7. The lock pin welding device of claim 5, characterized in that: The linear drive assembly comprises a slider (504), a base (505) and a cylinder (506); the base (505) is mounted on the top plate of the workbench (1) by means of bolts; a linear guide rail is mounted on the base (505); the slider (504) is slidably connected to the linear guide rail; the cylinder (506) is mounted on the rear end of the base (505) by means of a bracket; the piston rod of the cylinder (506) is parallel to the linear guide rail and the end of the piston rod is connected to the vertical plate at the rear end of the slider (504).

8. The lock pin welding device of claim 3, characterized in that: It also includes a discharge cylinder (6), which is supported above and behind the clamping rod (3) through a discharge bracket (601). The discharge cylinder (6) is a double piston rod cylinder, and a push plate is fixedly connected to the end of the piston rod; the push plate can push the far end of the locking pin handle (2').

9. The lock pin welding device of claim 8, characterized in that: It also includes an inductive sensor (7), which is installed on the unloading bracket (601) and can transmit the remote position signal of the locking pin handle (2') to the equipment controller.

10. A working method of a lock pin welding device, characterized in that: The lock pin welding device of the locker described in any one of claims 1 to 9 is used to weld the lock pin (1') and the lock pin handle (2').

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