An elevator beam welding fixture and method of use thereof

Abstract

The application belongs to the technical field of elevator welding processing, and particularly relates to an elevator beam welding tool and a use method thereof, which comprises a pedestal and a control box arranged on one side of the end face of the pedestal, and further comprises two longitudinal beam positioning frames arranged on two opposite sides above the pedestal, a plurality of mounting sleeves are mounted in the two longitudinal beam positioning frames, a resisting plate is slidably arranged in the mounting sleeve, a resisting driving mechanism and a vibration driving mechanism for moving the resisting plate are mounted in the mounting sleeve, and the resisting driving mechanism moves the resisting plate through the vibration driving mechanism. The application can reduce the possibility of deformation at the welding position of the longitudinal beam, improve the quality of the lower beam after welding, reduce the repair amount of the lower beam, quickly eliminate the influence of welding stress on the lower beam after welding, and roughly estimate the stress size and automatically control the stress elimination work.

Description

Technical Field

[0001] This invention belongs to the field of elevator welding processing technology, and in particular relates to an elevator beam welding fixture and its usage method. Background Technology

[0002] The elevator car's lower beam is the core load-bearing structure that supports the car body and load. It often adopts a combination design of channel-shaped or box-shaped main beams and reinforcing beams. Because it is necessary to flexibly match beam components of different lengths and cross-sections according to load requirements, welding can achieve rigid connection of each beam, ensuring the overall structural strength and stability, and meeting the mechanical requirements for vertical car operation.

[0003] To ensure the accuracy of the elevator car lower beam welding and improve welding efficiency, the horizontal and vertical beams of the elevator car lower beam are usually assembled on a tooling for pre-fixation during welding. Then, welding equipment such as welding robots are used to weld them, which effectively ensures the welding accuracy. For example, an elevator beam welding tooling disclosed in patent publication number CN106181191B.

[0004] However, since the two longitudinal main beams of the car's lower beam are basically made of channel steel or box steel, when the crossbeam is welded to the side wall of the longitudinal main beam, the side wall of the longitudinal main beam may undergo inward warping deformation due to the high temperature of welding. This requires special repair afterward, and the weld and heat-affected zone will form high residual stress. This deformation will affect the assembly accuracy of the lower beam and other car components, and the residual stress may lead to fatigue cracking of the weld after long-term stress. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing an elevator beam welding fixture and its usage method.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an elevator beam welding fixture, comprising a platform and a control box disposed on one side of the platform end face, and further comprising:

[0007] Two longitudinal beam positioning frames are set on two opposite sides above the platform. Multiple mounting sleeves are installed inside each of the two longitudinal beam positioning frames. A contact plate is slidably provided inside each mounting sleeve. A contact drive mechanism and a vibration drive mechanism are installed inside the mounting sleeve. The contact drive mechanism drives the contact plate to move through the vibration drive mechanism, and the vibration drive mechanism drives the contact plate to strike the longitudinal beam.

[0008] Multiple detection units are installed on the outer wall of the corresponding mounting sleeve, and the detection units detect the vibration decay rate of the longitudinal beam after the contact plate hits the longitudinal beam.

[0009] A longitudinal beam fixing unit is installed on the upper surface of the platform, and the longitudinal beam fixing unit is used to fix the longitudinal beam;

[0010] A beam fixing unit is installed on the upper surface of the pedestal, and the beam fixing unit is used to fix the beam.

[0011] Preferably, the abutment drive mechanism includes a fixed frame fixed inside the mounting sleeve, and a mounting plate is fixed to the side wall of the fixed frame. A push electric actuator is fixedly inserted into the side wall of the mounting plate, and the movable end of the push electric actuator is connected to the side wall of the abutment plate through a vibration drive mechanism. The push electric actuator is electrically connected to the control box.

[0012] Preferably, the vibration drive mechanism includes an extrusion plate fixedly installed at the movable end of the extrusion electric push rod. A magnetic isolation column is fixedly connected to the side wall of the extrusion plate. A connecting sleeve is fixed to the side wall of the contact plate near the extrusion plate, and a magnetic isolation sleeve is threadedly connected to the inner wall of the connecting sleeve. An iron core is threadedly connected to the inner wall of the magnetic isolation sleeve. One end of the magnetic isolation column slides into the interior of the magnetic isolation sleeve, and an electromagnetic column electrically connected to the control box is fixedly connected to the end of the magnetic isolation column located inside the magnetic isolation sleeve. A connecting plate is integrally sleeved on the side wall of the connecting sleeve, and an elastic telescopic component is connected to both the connecting plate and the side wall of the extrusion plate.

[0013] Preferably, the detection unit includes two square tubes fixed to opposite sides of the outer wall of the mounting sleeve. T-shaped rods are slidably connected to the ends of the two square tubes, and steel balls are fixedly connected to the ends of the two T-shaped rods located outside the square tubes. Supporting springs are provided between the sidewalls of the T-shaped rods and the square tubes. A strip plate is fixedly connected to the end of the T-shaped rod away from the steel ball. Multiple grating holes are opened on the sidewalls of the strip plate. Photoelectric switches and spotlights are respectively fixed inside the square tubes on both sides of the strip plate. The light emitted by the spotlights illuminates the photoelectric switches through the grating holes. Both the photoelectric switches and spotlights are electrically connected to a control box, and the control box controls the operation of the electromagnetic column based on the electrical signals fed back from the photoelectric switches.

[0014] Preferably, the longitudinal beam fixing unit includes two sets of main support columns fixed on opposite sides of the upper surface of the platform, and the longitudinal beam positioning frame is detachably installed on the top of the same set of main support columns. A support frame is fixedly connected to the side of the main support column away from the crossbeam fixing unit, and a clamping electric push rod is fixedly inserted into the side wall of the support frame. A clamping plate is fixedly connected to the movable end of the clamping electric push rod. A main positioning column is fixed to one end of the upper surface of the longitudinal beam positioning frame, and the clamping electric push rod is electrically connected to the control box.

[0015] Preferably, the beam fixing unit includes multiple sets of secondary support columns fixed to the upper surface of the pedestal, and each set of secondary support columns is arranged between two sets of main support columns. The top of the multiple secondary support columns in the same set is jointly installed with a support plate. Threaded columns are installed at both ends of the upper surface of each support plate. Two threaded columns on the same side are slidably connected to a pressure plate, and multiple pressing parts are fixedly connected to the bottom of the pressure plate. Each pressure plate is fixed relative to the threaded column by a nut. Multiple sets of secondary positioning columns corresponding to the positions of the pressing parts are fixed to the upper surface of the support plate.

[0016] Preferably, the elastic telescopic component includes a plurality of cylinders fixedly installed on the side wall of the connecting plate, and the ends of the cylinders are provided with stepped circular grooves. The side wall of the extrusion plate is fixedly connected with a plurality of extrusion columns, and each extrusion column slides through the side wall of the connecting plate and extends into the interior of the stepped circular groove. A return spring is fixedly provided between the end of the extrusion column located inside the stepped circular groove and the stepped circular groove.

[0017] A method for using an elevator beam welding fixture, the method comprising the following steps:

[0018] S1. Fix the two longitudinal beams to the outside of the longitudinal beam positioning frame through the main positioning column, then fix the multiple cross beams to the upper surface of the support plate through the auxiliary positioning column, and adjust the position of the pressure plate so that the pressing part presses down on the cross beams, and fix the pressure plate with nuts.

[0019] S2. Start the control box. The control box controls the clamping electric push rod to work and complete the fixing of the longitudinal beam.

[0020] S3. The control box controls the operation of the contact drive mechanism, at which time the welding work of the longitudinal beam and the transverse beam can be carried out simultaneously.

[0021] S4. After welding is completed, the control box automatically starts the vibration drive mechanism and simultaneously starts the detection unit.

[0022] S5. Once the staff hears the prompt message from the control box, it indicates that the single welding operation is over.

[0023] Compared with existing technologies, the advantages of a welding fixture for elevator beams and its application method are as follows:

[0024] 1. By cooperating with the set base, control box, longitudinal beam positioning frame, longitudinal beam fixing unit and cross beam fixing unit, the longitudinal beam and cross beam of the elevator car lower beam can be positioned and fixed. By cooperating with the set mounting sleeve, contact plate and contact drive mechanism, a reverse contact force can be applied to the welding position from the inside of the longitudinal beam during the welding process, thereby reducing the possibility of deformation at the welding position of the longitudinal beam, helping to improve the quality of the lower beam after welding, minimizing the need for repair of the lower beam, or reducing the difficulty of repairing the lower beam.

[0025] 2. Through the vibration drive mechanism, a hammering vibration force can be applied to the weld from the inside of the longitudinal beam after welding. The hammering vibration force promotes the release of stress at the weld, effectively improving the weld quality, enhancing the overall structural stability, making the mechanical properties of the lower beam more stable during long-term load-bearing operation, and ensuring the safe operation of the elevator.

[0026] 3. By setting up a detection unit, the magnitude and amplitude of the vibration force applied to the side wall of the longitudinal beam by the vibration drive mechanism can be automatically adjusted based on the transmission attenuation of the vibration force by the longitudinal beam, thereby improving the stress relief effect. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of an elevator beam welding fixture and its usage method provided by the present invention;

[0028] Figure 2 This is a side view sectional view of an elevator beam welding fixture and its usage method provided by the present invention.

[0029] Figure 3 This is a three-dimensional structural schematic diagram of the installation sleeve of an elevator beam welding fixture and its usage method provided by the present invention;

[0030] Figure 4 This is a schematic diagram of the internal structure of the installation sleeve of an elevator beam welding fixture and its usage method provided by the present invention;

[0031] Figure 5 This is a schematic diagram of the internal structure of a square tube in an elevator beam welding fixture and its usage method provided by the present invention.

[0032] Figure 6 This is a structural schematic diagram of the longitudinal beam fixing unit of an elevator beam welding fixture and its usage method provided by the present invention;

[0033] Figure 7 This is a schematic diagram of the crossbeam fixing unit of an elevator beam welding fixture and its usage method provided by the present invention.

[0034] In the diagram: 1. Base; 2. Control box; 3. Longitudinal beam positioning frame; 4. Mounting sleeve; 5. Contact plate; 6. Contact drive mechanism; 61. Fixing frame; 62. Mounting plate; 63. Extrusion electric push rod; 7. Vibration drive mechanism; 71. Extrusion plate; 72. Magnetic isolation column; 73. Connecting sleeve; 74. Magnetic isolation sleeve; 75. Iron core; 76. Electromagnetic column; 77. Connecting plate; 78. Elastic telescopic component; 8. Detection unit; 81. Square tube; 82. T-shaped rod; 83. Steel ball; 84. Support spring ; 85. Strip plate; 86. Grating hole; 87. Photoelectric switch; 88. Spotlight; 9. Longitudinal beam fixing unit; 91. Main support column; 92. Support frame; 93. Clamping electric push rod; 94. Clamping plate; 95. Main positioning column; 10. Crossbeam fixing unit; 101. Secondary support column; 102. Support plate; 103. Threaded column; 104. Pressure plate; 105. Pressing part; 106. Secondary positioning column; 11. Cylindrical column; 12. Stepped circular groove; 13. Push column; 14. Return spring. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0036] like Figures 1-7 As shown, an elevator beam welding fixture includes a platform 1 and a control box 2 disposed on one side of the end face of the platform 1. It also includes two longitudinal beam positioning frames 3, which are disposed on two opposite sides above the platform 1. Each of the two longitudinal beam positioning frames 3 has multiple mounting sleeves 4 installed inside. Each mounting sleeve 4 has a sliding contact plate 5 inside. The mounting sleeve 4 also has a contact drive mechanism 6 and a vibration drive mechanism 7 installed inside to push the contact plate 5. The contact drive mechanism 6 drives the contact plate 5 to move via the vibration drive mechanism 7. The contact drive mechanism 6 includes a fixed frame 61 fixed inside the mounting sleeve 4, and a mounting plate 62 is fixed to the side wall of the fixed frame 61. A pusher electric push rod 63 is fixedly inserted into the side wall of the mounting plate 62. The movable end of the pusher electric push rod 63 is connected to the side wall of the contact plate 5 via the vibration drive mechanism 7. The pusher electric push rod 63 is electrically connected to the control box 2 and can apply a reverse pushing force to the welding position from the inside of the longitudinal beam, thereby effectively preventing welding deformation.

[0037] The vibration drive mechanism 7 drives the contact plate 5 to strike the longitudinal beam. The vibration drive mechanism 7 includes a push plate 71 fixedly installed at the movable end of the push electric push rod 63. A magnetic isolation column 72 is fixedly connected to the side wall of the push plate 71. A connecting sleeve 73 is fixedly connected to the side wall of the contact plate 5 near the push plate 71. A magnetic isolation sleeve 74 is threadedly connected to the inner wall of the connecting sleeve 73. An iron core 75 is threadedly connected to the inside of the magnetic isolation sleeve 74. One end of the magnetic isolation column 72 slides into the inside of the magnetic isolation sleeve 74. An electromagnetic column 76 electrically connected to the control box 2 is fixedly connected to the end of the magnetic isolation column 72 inside the magnetic isolation sleeve 74. A connecting... The connecting plate 77 and the side wall of the extrusion plate 71 are connected to an elastic telescopic component 78. The elastic telescopic component 78 includes multiple cylinders 11 fixedly installed on the side wall of the connecting plate 77, and the ends of the cylinders 11 are provided with stepped circular grooves 12. Multiple extrusion columns 13 are fixedly connected to the side wall of the extrusion plate 71, and each extrusion column 13 slides through the side wall of the connecting plate 77 and extends into the interior of the stepped circular groove 12. A return spring 14 is fixedly provided between the end of the extrusion column 13 located inside the stepped circular groove 12 and the stepped circular groove 12, which can quickly apply high-frequency hammering vibration to the welding position of the longitudinal beam, thereby assisting in the elimination of welding stress.

[0038] Multiple detection units 8 are installed on the outer side wall of the corresponding mounting sleeve 4. The detection unit 8 detects the vibration decay rate of the longitudinal beam after the contact plate 5 impacts the longitudinal beam. The detection unit 8 includes square tubes 81 fixed on opposite sides of the outer side wall of the mounting sleeve 4. T-shaped rods 82 are slidably connected to the ends of the two square tubes 81, and steel balls 83 are fixedly connected to the ends of the two T-shaped rods 82 located outside the square tubes 81. Support springs 84 are provided between the side wall of the T-shaped rods 82 and the square tubes 81. A strip plate 85 is fixedly connected to the end of the T-shaped rods 82 away from the steel balls 83. The side wall of the strip plate 85 is open. The strip plate 85 is provided with multiple grating holes 86. On both sides of the strip plate 85, photoelectric switches 87 and spotlights 88 are respectively fixed inside the square tube 81. The light emitted by the spotlights 88 shines on the photoelectric switches 87 through the grating holes 86. Both the photoelectric switches 87 and the spotlights 88 are electrically connected to the control box 2. The control box 2 controls the operation of the electromagnetic column 76 according to the electrical signal fed back by the photoelectric switches 87. The photoelectric switches 87 can convert the light signal into an electrical signal and feed it back to the control box 2. The control box 2 can count the electrical signal and clear the accumulated count within a certain period of time.

[0039] The longitudinal beam fixing unit 9 is installed on the upper surface of the platform 1 and is used to fix the longitudinal beam. The longitudinal beam fixing unit 9 includes two sets of main support columns 91 fixed on opposite sides of the upper surface of the platform 1. The longitudinal beam positioning frame 3 is detachably installed on the top of the same set of main support columns 91. A support frame 92 is fixedly connected to the side of the main support column 91 away from the crossbeam fixing unit 10. A clamping electric push rod 93 is fixedly inserted into the side wall of the support frame 92. A clamping plate 94 is fixedly connected to the movable end of the clamping electric push rod 93. A main positioning column 95 is fixed to one end of the upper surface of the longitudinal beam positioning frame 3. The clamping electric push rod 93 is electrically connected to the control box 2, which can facilitate the positioning and installation of the longitudinal beam. The electric clamping method ensures stable contact between the longitudinal beam and the crossbeam, thereby ensuring the quality and dimensional accuracy of the weld.

[0040] The beam fixing unit 10 is installed on the upper surface of the pedestal 1 and is used to fix the beam. The beam fixing unit 10 includes multiple sets of secondary support columns 101 fixed on the upper surface of the pedestal 1. Each set of secondary support columns 101 is located between two sets of main support columns 91. The top of the multiple secondary support columns 101 in the same set is jointly installed with a support plate 102. Threaded columns 103 are installed at both ends of the upper surface of each support plate 102. Two threaded columns 103 on the same side are slidably connected to a pressure plate 104. Multiple pressing parts 105 are fixedly connected to the bottom of the pressure plate 104. Each pressure plate 104 is fixed relative to the threaded column 103 by a nut. Multiple sets of secondary positioning columns 106 corresponding to the positions of the pressing parts 105 are fixed on the upper surface of the support plate 102, which can facilitate the support and fixation of the beam and reserve a large welding space.

[0041] The operating principle of the present invention is explained as follows: Two longitudinal beams are fixed to the outside of the longitudinal beam positioning frame 3 by the main positioning column 95. Then, multiple crossbeams are fixed to the upper surface of the support plate 102 by the auxiliary positioning column 106. The position of the pressure plate 104 is adjusted so that the pressing part 105 presses down on the crossbeams. The pressure plate 104 is fixed by nuts (nuts are provided on both the upper and lower sides of the pressure plate 104. The position of the pressure plate 104 can be adjusted by adjusting the lower nut, while the pressure plate 104 can be fixed by the upper nut). Then, the control box 2 is started. The control box 2 will control the clamping electric push rod 93 to work at a time. The clamping electric push rod 93 can push the clamping plate 94 to push the longitudinal beams so that they abut against the side wall of the longitudinal beam positioning frame 3 and against the ends of each crossbeam (the working time of the clamping electric push rod 93 can be set according to the size of the longitudinal beam. Alternatively, a pressure element can be installed between the movable end of the pushing electric push rod 63 and the pushing plate 71. The operation will stop after the pressure reaches the threshold).

[0042] Subsequently, the welding robot is activated and performs welding work on the connection positions of the longitudinal beam and the transverse beam according to the preset program. Simultaneously, after the clamping electric push rod 93 finishes its work, the control box 2 controls the extrusion electric push rod 63 corresponding to the welding position to perform timed operations. The extrusion electric push rod 63 can drive each extrusion column 13 to move via the extrusion plate 71. Each extrusion column 13 drives the connecting plate 77 to move via the return spring 14 and the cylinder 11. The connecting plate 77 then drives the contact plate 5 to move via the connecting sleeve 73. When the contact plate 5 abuts against the inner wall of the longitudinal beam, the extrusion electric push rod 63 pushes the extrusion plate 71 to continue... Continue moving until the end of the extrusion column 13 abuts against the step of the stepped circular groove 12. At this time, the extrusion electric push rod 63 stops working. The extrusion electric push rod 63 applies a counter-pushing force to the welding position of the crossbeam and the longitudinal beam through the extrusion plate 71, the extrusion column 13, the stepped circular groove 12, the connecting plate 77, the connecting sleeve 73 and the abutment plate 5. This can prevent the longitudinal beam sidewall from being slightly deformed due to the high temperature of welding. (The working time of the extrusion electric push rod 63 can be set according to the size of the longitudinal beam. Alternatively, a pressure element can be installed between the movable end of the extrusion electric push rod 63 and the extrusion plate 71. The push rod stops working after the pressure reaches the threshold.)

[0043] After welding is completed, control box 2 waits for a certain period of time according to the preset program (this waiting time is set based on the temperature during welding; after the waiting time, the weld temperature is around 300℃; generally, the peak temperature of the weld and heat-affected zone can reach 1500℃-1800℃, requiring about 30 seconds to 2 minutes for the weld to cool down to around 300℃). Then, it controls the extrusion pusher 63 to move back a certain distance (this distance is set based on the internal dimensions of the longitudinal beam; after the extrusion pusher 63 moves back, it is necessary to ensure that the contact plate 5 is still in contact with the inner wall of the longitudinal beam). At this time, because the extrusion pusher 63 applies less extrusion force to the contact plate 5, the compression degree of each return spring 14 will decrease. Subsequently, control box 2 controls the electromagnetic column 76 to be energized at a frequency of 1 second followed by a 2-second interval. When the electromagnetic column 76 is energized, it will magnetically attract the iron core 75, causing the iron core 75 to move the connecting sleeve 73 towards the extrusion plate 71. At this time, the return spring 14 is compressed again, and the contact plate 5 will detach from the inner wall of the longitudinal beam. When the electromagnetic column 76 is de-energized, the magnetic attraction to the iron core 75 disappears, and the contact plate 5 will quickly move back under the action of the return spring 14 and hit the inner wall of the longitudinal beam. This allows the welding position to be struck from inside the longitudinal beam. Under the action of the strike, the lattice of the weld metal and the heat-affected zone will slip and rearrange under the action of the strike vibration, so that the internal stress originally formed by the cooling and shrinkage of the weld can be released. At the same time, the local plastic deformation alleviates the stress state of the stress concentration point and reduces the continuous damage of residual stress to the weld and longitudinal beam structure, thereby achieving stress elimination.

[0044] Meanwhile, when the longitudinal beam vibrates due to the impact of the contact plate 5, the vibration force is transmitted through the longitudinal beam to the steel balls 83 on both sides. The steel balls 83, after being impacted, are shaken away from the longitudinal beam, causing the steel balls 83 to move the strip plate 85 away from the crossbeam via the T-shaped rod 82. As the strip plate 85 moves, the grating holes 86 on its sidewalls move synchronously. When the grating hole 86 passes between the photoelectric switch 87 and the spotlight 88, the light emitted by the spotlight 88 illuminates the photoelectric switch 87, and the photoelectric switch 87 immediately sends a pulse signal back to the control box 2. After the grating hole 86 leaves the space between the photoelectric switch 87 and the spotlight 88, since the next grating hole 86 has not yet passed through, the photoelectric... The electrical signal fed back to control box 2 by switch 87 disappears until the next grating hole 86 passes by. Then, photoelectric switch 87 feeds back an electrical signal to control box 2 again. Control box 2 counts the electrical signals it receives each time. Before each operation of electromagnetic column 76, control box 2 resets the count and starts counting again. When the stress at the weld is low, the atomic arrangement inside the weld and longitudinal beam metal is relatively loose due to the low stress around the weld. Vibration energy is easily dissipated quickly through interatomic friction, resulting in rapid vibration decay and small amplitude. At this time, the vibration force on steel ball 83 is weak, therefore the moving distance and frequency of the strip plate 85 driven by steel ball 83 are smaller, allowing control box 2 to measure within 2 seconds. When the number of electrical signals is low, and the stress is high, the atoms inside the metal are in a tense state, and the vibration needs to overcome a stronger constraint force. The energy dissipation is slow, the attenuation is slow, and the amplitude is large. The steel ball 83 is vibrated more violently. At this time, the moving distance and moving frequency of the strip plate 85 are large, which makes the number of electrical signals measured by the control box 2 within 2 seconds too high. After the number of electrical signals measured by the control box 2 exceeds the threshold (this threshold can be adjusted by the control box 2, and is initially set to 6 and 10), the control box 2 controls the operation of the electromagnetic column 76 based on the threshold range. Taking the initial threshold of 6 and 10 as an example, when the number of electrical signals is between 6 and 9, the control box 2 controls the single energization time of the electromagnetic column 76 to be shortened by 0. For 5 seconds, the current applied increases by 0.2A. When the threshold reaches or exceeds 10, the control box 2 controls the single energization time of the electromagnetic column 76 to be shortened by 0.5 seconds again, and the current applied continues to increase by 0.2A. Due to the increased current inside the electromagnetic column 76, the electromagnetic column 76 attracts the iron core 75, causing the return spring 14 to be compressed further. Therefore, after the electromagnetic column 76 is de-energized, the impact force exerted by the contact plate 5 on the longitudinal beam is greater. By shortening the single energization time of the electromagnetic column 76, the impact frequency of the contact plate 5 on the longitudinal beam can be increased. Thus, the impact frequency and force at the welding position can be automatically adjusted by roughly estimating the stress around the welding.

[0045] After the control box 2 controls the electromagnetic column 76 to work for 1 minute, it stops the operation of the electromagnetic column 76 and controls the extrusion electric push rod 63 to retract and reset. Then the welding robot can start welding at the next position. At the same time, the control box 2 controls the extrusion electric push rod 63 and other components at the corresponding positions to repeat the above steps according to the program until the welding work of the longitudinal beam and the transverse beam is completed. Then the control box 2 controls each clamping electric push rod 93 to retract and reset. At the same time, the control box 2 issues a voice prompt to remind the personnel that the welding is completed. At this time, the personnel can remove the pressure plate 104 and take out the welded car lower beam, and then the welding work of the next lower beam can be carried out.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A welding fixture for elevator beams, comprising a platform (1) and a control box (2) disposed on one side of the end face of the platform (1), characterized in that, Also includes: Two longitudinal beam positioning frames (3) are set on two opposite sides above the platform (1). Multiple mounting sleeves (4) are installed inside each of the two longitudinal beam positioning frames (3). Abutment plates (5) are slidably provided inside each mounting sleeve (4). Abutment driving mechanism (6) and vibration driving mechanism (7) are installed inside the mounting sleeve (4). The abutment driving mechanism (6) drives the abutment plates (5) to move through the vibration driving mechanism (7), and the vibration driving mechanism (7) drives the abutment plates (5) to strike the longitudinal beam. Multiple detection units (8) are installed on the outer wall of the corresponding mounting sleeve (4), and the detection unit (8) detects the vibration decay rate of the longitudinal beam after the contact plate (5) hits the longitudinal beam; The longitudinal beam fixing unit (9) is installed on the upper surface of the platform (1) and is used to fix the longitudinal beam; A beam fixing unit (10) is installed on the upper surface of the pedestal (1), and the beam fixing unit (10) is used to fix the beam. The vibration drive mechanism (7) includes a push plate (71), a magnetic isolation column (72) is fixedly connected to the side wall of the push plate (71), a connecting sleeve (73) is fixed to the side wall of the contact plate (5) near the push plate (71), and a magnetic isolation sleeve (74) is threaded to the inner wall of the connecting sleeve (73). An iron core (75) is threaded to the inside of the magnetic isolation sleeve (74). One end of the magnetic isolation column (72) slides into the inside of the magnetic isolation sleeve (74), and an electromagnetic column (76) electrically connected to the control box (2) is fixed to the end of the magnetic isolation column (72) located inside the magnetic isolation sleeve (74). A connecting plate (77) is integrally sleeved on the side wall of the connecting sleeve (73), and an elastic telescopic component (78) is connected to the side wall of the push plate (71). The detection unit (8) includes two square tubes (81) fixed on opposite sides of the outer wall of the mounting sleeve (4). T-shaped rods (82) are slidably connected to the ends of both square tubes (81), and steel balls (83) are fixedly connected to the ends of the two T-shaped rods (82) outside the square tubes (81). Supporting springs (84) are provided between the sidewalls of the T-shaped rods (82) and the square tubes (81). A strip plate (85) is fixedly connected to the end of the T-shaped rod (82) away from the steel ball (83). The side wall of the plate (85) is provided with multiple grating holes (86). On both sides of the strip plate (85), photoelectric switches (87) and spotlights (88) are respectively fixed inside the square tube (81). The light emitted by the spotlights (88) shines on the photoelectric switches (87) through the grating holes (86). The photoelectric switches (87) and spotlights (88) are electrically connected to the control box (2). The control box (2) controls the operation of the electromagnetic column (76) according to the electrical signal fed back by the photoelectric switches (87).

2. The elevator beam welding fixture according to claim 1, characterized in that, The abutment drive mechanism (6) includes a fixed frame (61) fixed inside the mounting sleeve (4), and a mounting plate (62) is fixed on the side wall of the fixed frame (61). A push electric rod (63) is fixedly inserted into the side wall of the mounting plate (62), and the movable end of the push electric rod (63) is connected to the side wall of the abutment plate (5) through the vibration drive mechanism (7). The push electric rod (63) is electrically connected to the control box (2), and the push plate (71) is fixedly installed on the movable end of the push electric rod (63).

3. The elevator beam welding fixture according to claim 1, characterized in that, The longitudinal beam fixing unit (9) includes two sets of main support columns (91) fixed on opposite sides of the upper surface of the platform (1), and the longitudinal beam positioning frame (3) is detachably installed on the top of the same set of main support columns (91). The main support column (91) is fixedly connected to a support frame (92) on the side away from the crossbeam fixing unit (10), and a clamping electric push rod (93) is fixedly inserted into the side wall of the support frame (92). The movable end of the clamping electric push rod (93) is fixedly connected to a clamping plate (94). One end of the upper surface of the longitudinal beam positioning frame (3) is fixedly connected to a main positioning column (95). The clamping electric push rod (93) is electrically connected to the control box (2).

4. The elevator beam welding fixture according to claim 3, characterized in that, The beam fixing unit (10) includes multiple sets of secondary support columns (101) fixed on the upper surface of the base (1), and each set of secondary support columns (101) is set between two sets of main support columns (91). The top of the multiple secondary support columns (101) in the same set is jointly installed with a support plate (102). Both ends of the upper surface of each support plate (102) are installed with threaded columns (103). The two threaded columns (103) on the same side are slidably connected with a pressure plate (104). The bottom of the pressure plate (104) is fixedly connected with multiple pressing parts (105). Each pressure plate (104) is fixed relative to the threaded column (103) by a nut. The upper surface of the support plate (102) is fixed with multiple sets of secondary positioning columns (106) corresponding to the positions of the pressing parts (105).

5. The elevator beam welding fixture according to claim 1, characterized in that, The elastic telescopic component (78) includes a plurality of cylinders (11) fixedly installed on the side wall of the connecting plate (77), and the end of the cylinder (11) is provided with a stepped circular groove (12). The side wall of the extrusion plate (71) is fixedly connected with a plurality of extrusion columns (13), and each extrusion column (13) slides through the side wall of the connecting plate (77) and extends into the interior of the stepped circular groove (12). A return spring (14) is fixedly provided between the end of the extrusion column (13) located inside the stepped circular groove (12) and the stepped circular groove (12).

6. The method of using the elevator beam welding fixture according to claim 4, characterized in that, The usage method includes the following steps: S1. Fix the two longitudinal beams to the outside of the longitudinal beam positioning frame (3) through the main positioning column (95), then fix the multiple cross beams to the upper surface of the support plate (102) through the auxiliary positioning column (106), and adjust the position of the pressure plate (104) so ​​that the pressing part (105) presses down on the cross beams, and fix the pressure plate (104) with nuts. S2. Start the control box (2). The control box (2) controls the clamping electric push rod (93) to work and complete the fixing of the longitudinal beam. S3, control box (2) controls the operation of the contact drive mechanism (6), at which time welding work can be carried out simultaneously on the longitudinal beam and the transverse beam; S4. After welding is completed, the control box (2) automatically starts the vibration drive mechanism (7) and simultaneously starts the detection unit (8). S5. When the staff hears the prompt message issued by the control box (2), it indicates that the single welding operation is over.

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