A clamping fixture for welding of automobile anti-collision beams

Abstract

The present invention is applicable to the technical field of welding fixtures, and provides a clamping fixture for the welding processing of automobile anti-collision beams, comprising a clamping table; the clamping table comprises a U-shaped seat; a first clamping part is fixed to the two side surfaces of the U-shaped seat by fastening bolts; a second clamping part is fixedly installed on the surface of the ear plate; the first clamping part clamps the main beam to be welded; the second clamping part symmetrically clamps the energy absorption box to be welded; the first clamping part comprises a positioning plate; a fixing plate is symmetrically fixed to the bottom of the positioning plate; the second clamping part comprises a lifting frame and two sliding frames symmetrically slidably arranged on the lifting frame; the sliding frame comprises a slide plate; clamping plates adapted to the energy absorption box to be welded are symmetrically fixed at both ends of the slide plate. The device clamps the main beam to be welded by the first clamping part, and accurately clamps the two energy absorption boxes to be welded by the second clamping part, replacing the traditional manual hand-supporting method, thereby improving the safety of production and the work efficiency. At the same time, the stability of the anti-collision beam welding process is improved, thereby improving the accuracy of welding.

Description

Technical Field

[0001] The invention relates to the technical field of welding fixtures, and more particularly to a clamping fixture used for welding processing of automobile anti-collision beams. Background Art

[0002] The car anti-collision beam is a device used to reduce the impact energy when the vehicle is hit. It consists of a main beam, an energy absorption box, and a mounting plate connected to the car. The main beam and the energy absorption box can effectively absorb the collision energy when the vehicle collides at a low speed, and minimize the damage of the impact force to the longitudinal beam of the vehicle body, thereby playing a protective role on the vehicle.

[0003] During the production process of automobile anti-collision beams, two sets of energy absorption boxes need to be welded on both sides of the main beam respectively. Most of the time, the main beam is clamped by a clamp, and then the operator places the energy absorption box at the designated welding position and performs welding operations by holding the energy absorption box with hands. The welding process has poor stability, which reduces the accuracy of welding. At the same time, the welding process can easily cause burns to the operator, reducing the safety of production. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a clamping fixture for the welding processing of automobile anti-collision beams, which clamps the main beam to be welded by a first clamping part, and accurately clamps the two energy absorption boxes to be welded by a second clamping part, replacing the traditional manual hand-supporting method, thereby improving production safety and work efficiency. At the same time, it improves the stability of the anti-collision beam welding process, thereby improving the accuracy of welding.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A clamping jig for welding automobile anti-collision beams, comprising a clamping platform; the clamping platform comprises a U-shaped seat; a first clamping portion is fixed to both side surfaces of the U-shaped seat by fastening bolts; an ear plate is fixedly installed on the surface of the U-shaped seat; a second clamping portion is fixedly installed on the surface of the ear plate; the first clamping portion clamps a main beam to be welded; the second clamping portion symmetrically clamps an energy absorption box to be welded; the first clamping portion comprises a positioning plate adapted to the main beam to be welded; a fixing plate is symmetrically fixed to the bottom of the positioning plate; the second clamping portion comprises a lifting frame and two sliding frames symmetrically slidably arranged on the lifting frame; the sliding frame comprises a slide plate; clamping plates adapted to the energy absorption box to be welded are symmetrically fixed at both ends of the slide plate.

[0007] The present invention is further configured as follows: U-shaped plates that are plug-matched with the fixing plates are symmetrically fixed on two opposite sides of the U-shaped seat; supporting legs are symmetrically fixed on the bottom surface of the U-shaped seat; a number of mounting holes are evenly opened on the sides of the fixing plates; a number of guide tubes are penetrated by two opposite sides of the U-shaped seat; a plug-in column that is plug-matched with the corresponding mounting hole is plugged in each of the guide tubes; and a mounting plate is fixed between the ends of adjacent plug-in columns.

[0008] The present invention is further configured as follows: a reset spring is symmetrically fixed between the mounting plate and the inner wall of the U-shaped seat; a vertical plate is fixed to the bottom surface of the U-shaped seat; L-shaped tubes are symmetrically provided on the vertical plates; Z-shaped tubes are symmetrically fixed on the surface of the U-shaped seat on both sides of the vertical plates; a connecting rope is passed through each of the L-shaped tubes and the Z-shaped tube; and the two ends of the connecting rope are respectively connected to the side surfaces of the two vertical plates.

[0009] The present invention is further configured as follows: a curved groove is stamped out on the outer peripheral side surface of the main beam to be welded; the positioning plate is adapted to the curved groove; guide frames are symmetrically fixed at both ends of the positioning plate; a threaded ring is fixed on the side surface of the guide frame; a screw is rotatably arranged in the threaded ring; a T-shaped pressure plate is rotatably arranged on the peripheral side surface of the screw near its end; a guide column that slides with the guide frame is fixed to the ground of the T-shaped pressure plate; a handle is fixed to the end of the screw.

[0010] The present invention is further configured as follows: the lifting frame includes an electric push rod fixedly mounted on the surface of the ear plate; a horizontal plate is fixed to the telescopic end of the electric push rod; a servo motor is fixed to the side of the horizontal plate; the output end of the servo motor is connected to a bidirectional screw rod through a reducer; sliding rods are symmetrically fixed to the side of the horizontal plate on both sides of the bidirectional screw rod; screw holes that are rotationally matched with the threads of the bidirectional screw rod are opened on the side of the slide plate, and sliding holes that are symmetrically clamped on the side of the slide plate on both sides of the screw holes and slidingly matched with the corresponding sliding rods are slidably matched.

[0011] The present invention is further configured as follows: a connecting plate is fixed at one end of the energy absorption box to be welded; a mounting groove for sliding fit of the connecting plate is provided on the side of the clamping plate; and an avoidance groove for avoiding the energy absorption box to be welded is provided on the bottom surface of the mounting groove.

[0012] The present invention is further configured as follows: an ejection portion is symmetrically and slidingly arranged on the bottom surface of the U-shaped seat; the ejection portion includes an ejection plate adapted to the outer peripheral side surface of the main beam to be welded; a limiting rod is symmetrically fixed to the bottom of the ejection plate; a stopper is fixed to the bottom end of the limiting rod; a plurality of limiting holes symmetrically opened on the bottom surface of the U-shaped seat that are slidably matched with the corresponding limiting rods; a support spring sleeved on the limiting rod is fixedly connected between the ejection plate and the U-shaped seat.

[0013] The present invention is further configured as follows: an L-shaped plate is symmetrically fixed on the side of the ejection plate; a positioning hole is opened on the side of the L-shaped plate; a positioning rod that is plugged into the corresponding positioning hole is symmetrically fixed on the side of the slide plate; a controller is fixedly installed on the surface of the U-shaped seat; and the output end of the controller is electrically connected to the electric push rod and the servo motor respectively.

[0014] The advantages of the present invention are:

[0015] 1. The present invention places the curved groove on the outer peripheral side of the main beam to be welded into an adaptive positioning plate, rotates the handle to drive the screw to rotate and descend, and cooperates with the guide column to make the T-shaped pressure plate descend to press the main beam to be welded, thereby achieving rapid clamping and positioning of the main beam to be welded, improving work efficiency, and at the same time, improving the stability of the anti-collision beam welding process, thereby improving the accuracy of welding.

[0016] 2. The present invention slides two energy absorption boxes to be welded into a group of installation grooves on the two second clamping parts respectively, controls and starts the servo motor to drive the bidirectional screw to rotate, thereby driving the two second clamping parts to approach each other synchronously, so that the two energy absorption boxes to be welded are clamped in the two adjacent clamping plates. At this time, the projections of the two energy absorption boxes to be welded are just at the welding position on the main beam to be welded, thereby achieving precise clamping of the energy absorption boxes to be welded, replacing the traditional manual hand-supporting method, improving production safety, further improving work efficiency, and at the same time, further improving the stability of the anti-collision beam welding process, thereby further improving the accuracy of welding.

[0017] 3. The present invention controls the electric push rod to descend and drives the two energy absorption boxes to be welded to the welding position on the main beam to be welded to perform the welding operation. After the welding operation is completed, the handle is rotated in the opposite direction to make the T-shaped pressure plate rise, and the pressure on the main beam to be welded is released. The two-way screw is controlled to rotate in the opposite direction, thereby driving the two second clamping parts to be synchronized with each other, so that the connecting plate on the energy absorption box to be welded is separated from the corresponding clamping plate, and the two-way screw continues to rotate, driving the corresponding positioning rods on the two slides to insert into the corresponding positioning holes, and the electric push rod is controlled to rise, thereby driving the two sliding frames together with the two ejection parts to rise, so that the welded anti-collision beam is lifted and separated from the positioning plate through the two ejection plates, and the material removal of the anti-collision beam is completed, which further improves the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a schematic structural diagram of a clamping fixture used for welding an automobile anti-collision beam in a welding state.

[0019] Figure 2 For the present invention Figure 1 Schematic diagram of the structure from the front view.

[0020] Figure 3The present invention is a schematic structural diagram of a clamping fixture used for welding processing of automobile anti-collision beams in a material-removing state.

[0021] Figure 4 It is a structural schematic diagram of the clamping table of the present invention.

[0022] Figure 5 It is a schematic structural diagram of the first clamping part of the present invention.

[0023] Figure 6 It is a schematic structural diagram of the second clamping portion of the present invention.

[0024] Figure 7 It is a schematic structural diagram of the main beam to be welded according to the present invention.

[0025] Figure 8 It is a schematic structural diagram of the energy absorption box to be welded according to the present invention.

[0026] Fig. 9 It is a schematic structural diagram of the lifting frame of the present invention.

[0027] Fig.10 It is a structural schematic diagram of the sliding frame of the present invention.

[0028] Fig.11 It is a structural schematic diagram of the clamping platform and the first clamping part assembly of the present invention.

[0029] Fig.12 It is a schematic structural diagram of the ejection part of the present invention.

[0030] In the figure: 1, clamping table; 2, U-shaped seat; 3, first clamping part; 4, ear plate; 5, second clamping part; 6, main beam to be welded; 7, energy absorption box to be welded; 8, positioning plate; 9, fixing plate; 10, lifting frame; 11, sliding frame; 12, sliding plate; 13, clamping plate; 14, U-shaped plate; 15, supporting leg; 16, mounting hole; 17, guide tube; 18, plug-in column; 19, mounting plate; 20, reset spring; 21, vertical plate; 22, L-shaped tube; 23, Z-shaped tube; 24, connecting rope; 25, curved concave slot; 26, guide frame; 27, threaded ring; 28, screw; 29, T-shaped pressure plate; 30, guide column; 31, handle; 32, electric push rod; 33, cross plate; 34, servo motor; 35, bidirectional screw; 36, slide rod; 37, screw hole; 38, slide hole; 39, connecting plate; 40, installation slot; 41, avoidance slot; 42, ejector; 43, ejector plate; 44, limit rod; 45, block; 46, limit hole; 47, support spring; 48, L-shaped plate; 49, positioning hole; 50, positioning rod. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0033] In the present invention, unless otherwise specified, the directions used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0034] For example, see Figure 1-12 , the present invention provides the following technical solutions:

[0035] A clamping jig for welding automobile anti-collision beams, specifically, comprises a clamping platform 1; the clamping platform 1 comprises a U-shaped seat 2; the first clamping portion 3 is fixed to both side surfaces of the U-shaped seat 2 by fastening bolts; an ear plate 4 is fixedly mounted on the surface of the U-shaped seat 2; a second clamping portion 5 is fixedly mounted on the surface of the ear plate 4; the first clamping portion 3 clamps a main beam 6 to be welded; the second clamping portion 5 symmetrically clamps an energy absorption box 7 to be welded; the first clamping portion 3 comprises a positioning plate 8 adapted to the main beam 6 to be welded; a fixing plate 9 is symmetrically fixed to the bottom of the positioning plate 8; the second clamping portion 5 comprises a lifting frame 10 and two sliding frames 11 symmetrically slidably arranged on the lifting frame 10; the sliding frame 11 comprises a slide plate 12; clamping plates 13 adapted to the energy absorption box 7 to be welded are symmetrically fixed to both ends of the slide plate 12.

[0036] The working principle of the first embodiment is as follows: the main beam 6 to be welded is clamped and fixed by the first clamping part 3, the two energy absorption boxes 7 to be welded are accurately clamped by the second clamping part 5, and the two clamped energy absorption boxes 7 to be welded are lowered to the welding position on the main beam 6 to be welded by controlling the lifting frame 10 to descend, replacing the traditional manual hand-supporting method, thereby improving the safety of production, improving work efficiency, and at the same time, improving the stability of the anti-collision beam welding process, thereby improving the accuracy of welding.

[0037] For example 2, please refer to Figure 1-12, the second embodiment makes the following improvements on the basis of the first embodiment. Specifically, U-shaped plates 14 that are plugged and matched with the fixing plate 9 are symmetrically fixed on the two opposite sides of the U-shaped seat 2; supporting legs 15 are symmetrically fixed on the bottom surface of the U-shaped seat 2; a number of mounting holes 16 are evenly opened on the side of the fixing plate 9; a number of guide tubes 17 are penetrated on the two opposite sides of the U-shaped seat 2; each guide tube 17 is plugged with a plug-in column 18 that is plugged and matched with the corresponding mounting hole 16; a mounting plate 19 is fixed between the ends of adjacent plug-in columns 18; a reset spring 20 is symmetrically fixed between the mounting plate 19 and the inner wall of the U-shaped seat 2; a vertical plate 21 is fixed on the bottom surface of the U-shaped seat 2; L-shaped tubes 22 are symmetrically penetrated on the vertical plate 21; Z-shaped tubes 23 are symmetrically fixed on the surface of the U-shaped seat 2 on both sides of the vertical plate 21; a connecting rope 24 is passed through each L-shaped tube 22 and Z-shaped tube 23; the two ends of the connecting rope 24 are respectively connected to the side surfaces of the two vertical plates 21.

[0038] The working principle of the second embodiment of the present invention is as follows: the connecting rope 24 is pulled to drive the two mounting plates 19 and the corresponding plug-in columns 18 to move toward the vertical plate 21, and the corresponding reset spring 20 is stretched to insert the two fixing plates 9 on the first clamping part 3 into the U-shaped plates 14 on the two opposite sides of the U-shaped seat 2. The hand that tightens the connecting rope 24 is released, and under the elastic reset force of the corresponding reset spring 20, the plug-in columns 18 are driven to be inserted into the corresponding mounting holes 16 along the corresponding guide tubes 17, thereby completing the rapid assembly of the first clamping part 3 and the clamping platform 1, and facilitating the replacement and maintenance of the first clamping part 3.

[0039] For example 3, please refer to Figure 1-12 The third embodiment of the present invention makes the following improvements on the basis of the second embodiment. Specifically, a curved groove 25 is formed by punching the outer peripheral side surface of the main beam 6 to be welded; the positioning plate 8 is adapted to the curved groove 25; guide frames 26 are symmetrically fixed at both ends of the positioning plate 8; a threaded ring 27 is fixed on the side surface of the guide frame 26; a screw 28 is provided in the threaded ring 27 for rotation; a T-shaped pressing plate 29 is rotatably provided on the side surface of the screw 28 near its end; a guide column 30 that slides with the guide frame 26 is fixed on the ground of the T-shaped pressing plate 29; a handle 31 is fixed on the end of the screw 28.

[0040] The working principle of the third embodiment is as follows: by placing the curved groove 25 on the outer peripheral side of the main beam 6 to be welded into the matching positioning plate 8, rotating the handle 31 to drive the screw 28 to rotate and descend, and cooperating with the sliding cooperation of the guide column 30 and the guide frame 26, the T-shaped pressure plate 29 descends to press the main beam 6 to be welded, thereby realizing rapid clamping and positioning of the main beam 6 to be welded, improving work efficiency, and at the same time, improving the stability of the anti-collision beam welding process, thereby improving the accuracy of welding.

[0041] Example 4, please refer to Figure 1-12, the fourth embodiment of the present invention is improved as follows on the basis of the third embodiment. Specifically, the lifting frame 10 includes an electric push rod 32 fixedly mounted on the surface of the ear plate 4; a cross plate 33 is fixed to the telescopic end of the electric push rod 32; a servo motor 34 is fixed to the side of the cross plate 33; the output end of the servo motor 34 is connected to a bidirectional screw rod 35 through a reducer; sliding rods 36 are symmetrically fixed to the sides of the cross plate 33 on both sides of the bidirectional screw rod 35; a screw hole 37 for threaded rotation with the bidirectional screw rod 35 is opened on the side of the slide plate 12, and sliding holes 38 for sliding cooperation with the corresponding sliding rods 36 are symmetrically clamped on the sides of the screw hole 37; a connecting plate 39 is fixed to one end of the energy absorption box 7 to be welded; a mounting groove 40 for sliding cooperation with the connecting plate 39 is opened on the side of the clamping plate 13; and an avoidance groove 41 for avoiding the energy absorption box 7 to be welded is opened on the inner bottom surface of the mounting groove 40.

[0042] The working principle of the fourth embodiment is as follows: by sliding the two energy absorption boxes 7 to be welded into a group of mounting grooves 40 on the two second clamping parts 5 respectively, the servo motor 34 is controlled to start to drive the bidirectional screw 35 to rotate, thereby driving the two second clamping parts 5 to approach each other synchronously, so that the two energy absorption boxes 7 to be welded are clamped in the two adjacent clamping plates 13. At this time, the projections of the two energy absorption boxes 7 to be welded are just at the welding position on the main beam 6 to be welded, so that the energy absorption boxes 7 to be welded can be accurately clamped, replacing the traditional manual hand-supporting method, improving the safety of production, further improving the work efficiency, and at the same time, further improving the stability of the anti-collision beam welding process, thereby further improving the accuracy of welding.

[0043] For example 5, please refer to Figure 1-12 , the fifth embodiment makes the following improvements on the basis of the fourth embodiment. Specifically, the bottom surface of the U-shaped seat 2 is symmetrically slidably provided with an ejector portion 42; the ejector portion 42 includes an ejector plate 43 adapted to the outer peripheral side surface of the main beam 6 to be welded; a limit rod 44 is symmetrically fixed to the bottom of the ejector plate 43; a stopper 45 is fixed to the bottom end of the limit rod 44; a plurality of limit holes 46 symmetrically opened on the bottom surface of the U-shaped seat 2 and slidingly matched with the corresponding limit rod 44; a support spring 47 sleeved on the limit rod 44 is fixedly connected between the ejector plate 43 and the U-shaped seat 2; an L-shaped plate 48 is symmetrically fixed to the side surface of the ejector plate 43; a positioning hole 49 is opened on the side surface of the L-shaped plate 48; a positioning rod 50 plugged and matched with the corresponding positioning hole 49 is symmetrically fixed to the side surface of the slide plate 12; a controller is fixedly installed on the surface of the U-shaped seat 2; the output end of the controller is electrically connected to the electric push rod 32 and the servo motor 34 respectively.

[0044] The working principle of the fifth embodiment of the present invention is as follows: by controlling the electric push rod 32 to descend, the two energy absorption boxes 7 to be welded are driven to descend to the welding position on the main beam 6 to be welded, and the welding operation is performed. After the welding operation is completed, the handle 31 is rotated in the opposite direction to make the T-shaped pressure plate 29 rise, and the pressure on the main beam 6 to be welded is released. The bidirectional screw rod 35 is controlled to rotate in the opposite direction, thereby driving the two second clamping parts 5 to synchronize with each other, so that the connecting plate 39 on the energy absorption box 7 to be welded is disengaged from the corresponding clamping plate 13, and the bidirectional screw rod 35 continues to rotate, driving the corresponding positioning rods 50 on the two slides 12 to be inserted into the corresponding positioning holes 49, and the electric push rod 32 is controlled to rise, thereby driving the two sliding frames 11 together with the two ejection parts 42 to rise, and the corresponding support springs 47 are stretched, so that the welded anti-collision beam is lifted up and separated from the positioning plate 8 through the two ejection plates 43, and the material removal of the anti-collision beam is completed, which further improves the working efficiency.

[0045] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0046] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0047] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0049] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A clamping fixture for welding of automobile anti-collision beams, comprising a clamping table (1); characterized in that: The clamping platform (1) comprises a U-shaped seat (2); first clamping portions (3) are fixed to two side surfaces of the U-shaped seat (2) by means of fastening bolts; a lug plate (4) is fixedly mounted on the surface of the U-shaped seat (2); and a second clamping portion (5) is fixedly mounted on the surface of the lug plate (4); The first clamping portion (3) clamps the main beam (6) to be welded; the second clamping portion (5) symmetrically clamps the energy absorption box (7) to be welded; The first clamping portion (3) comprises a positioning plate (8) adapted to the main beam (6) to be welded; a fixing plate (9) is symmetrically fixed to the bottom of the positioning plate (8); The second clamping portion (5) comprises a lifting frame (10) and two sliding frames (11) symmetrically slidably arranged on the lifting frame (10); the sliding frame (11) comprises a slide plate (12); clamping plates (13) adapted to the energy absorption box (7) to be welded are symmetrically fixed at both ends of the slide plate (12); U-shaped plates (14) that are plug-matched with the fixing plate (9) are symmetrically fixed on two opposite side surfaces of the U-shaped seat (2); support legs (15) are symmetrically fixed on the bottom surface of the U-shaped seat (2); a plurality of mounting holes (16) are evenly provided on the side surface of the fixing plate (9); a plurality of guide tubes (17) are provided through two opposite side surfaces of the U-shaped seat (2); a plug-in column (18) that is plug-matched with the corresponding mounting hole (16) is plug-inly provided in each of the guide tubes (17); a mounting plate (19) is fixed between the ends of adjacent plug-in columns (18); A return spring (20) is symmetrically fixed between the mounting plate (19) and the inner wall of the U-shaped seat (2); a vertical plate (21) is fixed to the bottom surface of the U-shaped seat (2); an L-shaped tube (22) is symmetrically provided through the vertical plate (21); a Z-shaped tube (23) is symmetrically fixed on the surface of the U-shaped seat (2) on both sides of the vertical plate (21); a connecting rope (24) is provided through each of the L-shaped tube (22) and the Z-shaped tube (23); and two ends of the connecting rope (24) are respectively connected to the side surfaces of the two vertical plates (21); The outer peripheral side surface of the main beam (6) to be welded is punched to form a curved groove (25); the positioning plate (8) is adapted to the curved groove (25); guide frames (26) are symmetrically fixed at both ends of the positioning plate (8); a threaded ring (27) is fixed to the side surface of the guide frame (26); a screw rod (28) is rotatably arranged in the threaded ring (27); a T-shaped pressing plate (29) is rotatably arranged on the peripheral side surface of the screw rod (28) near its end; a guide column (30) that is slidably matched with the guide frame (26) is fixed to the ground of the T-shaped pressing plate (29); a handle (31) is fixed to the end of the screw rod (28); The lifting frame (10) comprises an electric push rod (32) fixedly mounted on the surface of the ear plate (4); a horizontal plate (33) is fixed to the telescopic end of the electric push rod (32); a servo motor (34) is fixed to the side of the horizontal plate (33); an output end of the servo motor (34) is connected to a bidirectional screw rod (35) via a reducer; sliding rods (36) are symmetrically fixed to the side of the bidirectional screw rod (35) on both sides; a screw hole (37) is opened on the side of the slide plate (12) for rotating with the thread of the bidirectional screw rod (35), and sliding holes (38) are symmetrically clamped on the side of the slide plate (12) on both sides of the screw hole (37) for sliding with the corresponding sliding rod (36); A connecting plate (39) is fixed to one end of the energy absorption box (7) to be welded; a mounting groove (40) for slidingly engaging the connecting plate (39) is provided on a side surface of the clamping plate (13); and an avoidance groove (41) for avoiding the energy absorption box (7) to be welded is provided on an inner bottom surface of the mounting groove (40).

2. The clamping fixture for welding of automobile anti-collision beams according to claim 1 is characterized in that: The bottom surface of the U-shaped seat (2) is symmetrically provided with an ejector portion (42) for sliding; the ejector portion (42) comprises an ejector plate (43) adapted to the outer peripheral side surface of the main beam (6) to be welded; a limiting rod (44) is symmetrically fixed to the bottom of the ejector plate (43); a stopper (45) is fixed to the bottom end of the limiting rod (44); a plurality of limiting holes (46) slidably matched with the corresponding limiting rods (44) are symmetrically provided on the bottom surface of the U-shaped seat (2); and a support spring (47) sleeved on the limiting rod (44) is fixedly connected between the ejector plate (43) and the U-shaped seat (2).

3. The clamping fixture for welding of automobile anti-collision beams according to claim 2 is characterized in that: An L-shaped plate (48) is symmetrically fixed to the side of the ejection plate (43); a positioning hole (49) is opened on the side of the L-shaped plate (48); a positioning rod (50) pluggably matched with the corresponding positioning hole (49) is symmetrically fixed to the side of the slide plate (12); a controller is fixedly mounted on the surface of the U-shaped seat (2); and the output end of the controller is electrically connected to the electric push rod (32) and the servo motor (34) respectively.

Images