A welding anti-deformation device for the lower frame of a stable excavator

Abstract

The present invention relates to the technical field of welding anti-deformation devices, specifically to a stable excavator lower frame welding anti-deformation device, including a workbench and a limiting device, the surface of the workbench is provided with a web, and the surface of the workbench is located on both sides of the web and side wing plates are installed respectively through the limiting device, the limiting device includes a mounting plate, the mounting plate is fixedly connected to one side of the workbench, the surface of the mounting plate is fixedly connected to a hydraulic telescopic rod, the surface of the workbench is located on both sides close to the web and a rotating frame is fixedly connected, and the cross-section of the rotating frame is "U"-shaped. During the welding process of the excavator lower frame, the present invention effectively avoids the deformation effect caused by stress shrinkage during the welding process by applying an angle in advance, plays a good anti-deformation role, improves the production and manufacturing efficiency and finished product utilization rate of the lower frame, and also reduces the dimensional error and deformation during welding to a certain extent.

Description

Technical Field

[0001] The invention relates to the technical field of welding anti-deformation devices, in particular to a welding anti-deformation device for a lower frame of a stable excavator. Background Art

[0002] The excavator lower frame is one of the components of the excavator and is located on the chassis of the excavator. During the production and manufacturing of the lower frame, it needs to be welded together by combining multiple parts. During the welding process of the lower frame, it was found that it will be deformed due to the influence of welding stress during welding. Therefore, some devices need to be used during welding to prevent deformation and ensure the normal use of the excavator lower frame.

[0003] When welding the traditional excavator lower frame, there is a welding process for the I-beam web and wing plates. The inventor found that during daily use, the stress of welding would cause the welded parts to shrink and deform, resulting in deformation of the wing plates on both sides. At the same time, because the two webs of the middle I-beam are fixed, the wing plates on both sides of the web would tilt inward, causing defects in the finished product of the excavator lower frame, affecting normal use and causing the excavator to malfunction.

[0004] In order to address the above problems, after the welding of the I-beam web and the wing plate is completed, the wing plates on both sides will be heated and then straightened to restore the wing plates to a flat state, reduce the finished product error of the excavator lower frame, and ensure the normal use of the excavator lower frame. This application provides another solution. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem in the prior art that due to the influence of welding stress, the welding parts will shrink and deform, resulting in deformation of the wing plates on both sides. At the same time, because the two webs of the middle I-beam are fixed, the wing plates on both sides of the web will tilt inward, resulting in defects in the finished product of the excavator lower frame, affecting normal use and causing the excavator to malfunction. A stable excavator lower frame welding anti-deformation device is proposed.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a stable excavator lower frame welding anti-deformation device, comprising a workbench and a limit device, the surface of the workbench is provided with a web, and the surface of the workbench is located on both sides of the web and is respectively installed with side wing plates through the limit device, the limit device comprises a mounting plate, the mounting plate is fixedly connected to one side of the workbench, the surface of the mounting plate is fixedly connected to a hydraulic telescopic rod, the surface of the workbench is located on both sides of the web and is respectively fixedly connected to a rotating frame, the cross-section of the rotating frame is "U"-shaped, the rotation connection on the arc surface of the rotating frame is a limit frame, the side wing plates are clamped on the inner wall of the limit frame, the surface of the limit frame is threaded with a screw, one end of the screw close to the inner wall of the limit frame is rotatably connected to a pressure plate, the pressure plate is slidably connected to the inner wall of the limit frame, the pressure plate abuts against the surface of the side wing plate, and the output end of the hydraulic telescopic rod abuts against the surface of the limit frame.

[0007] The effect achieved by the above components is as follows: when welding and fixing the web and side wing plates in the lower frame of the excavator, first fix the web plate to the surface of the workbench, then install the two side wing plates in the inner wall of the limit frame respectively, and then rotate the screw on the surface of the limit frame. The rotation of the screw will drive the pressure plate to move until the pressure plate and the side wing plates are in contact and squeezed, thereby forming a limit fixation for the side wing plates, and then rotate the limit frame so that the limit frame rotates around the rotating hole as the center, so that a certain angle is formed between the web plate and the side wing plates, and at the same time, the output end of the hydraulic telescopic rod on the mounting plate is in contact with the limit frame. Then, during the welding process of the web and the side wing plates, the hydraulic telescopic rod is started so that the output end of the hydraulic telescopic rod abuts the limit frame during the extension process, so that the limit frame rotates along the rotating frame with the web, and then the angle between the web and the side wing plates becomes smaller and smaller as the welding work progresses, until the web and the side wing plates are completely squeezed and tightly fitted when the welding is completed. At this time, during the welding process of the excavator lower frame, the deformation effect caused by stress shrinkage during the welding process is effectively avoided by applying the angle in advance, which plays a good anti-deformation role and improves the production efficiency and finished product utilization rate of the lower frame.

[0008] Preferably, a protective plate is fixedly connected to the side of the surface of the pressing plate away from the screw, and the protective plate is a sponge plate.

[0009] The effect achieved by the above components is: through the setting of the protective plate, when the pressure plate contacts and squeezes the side wing plate, it is not easy to cause damage to the side wing plate due to excessive strength of contact and squeezing, thereby ensuring the welding forming effect of the web and the side wing plate, thereby improving the use effect of the limit device and preventing the deformation of the lower frame components during the welding process to the greatest extent.

[0010] Preferably, the output end of the hydraulic telescopic rod is fixedly connected to a limit plate, the cross section of the limit plate is "U"-shaped, and the inner wall of the limit plate is snap-fitted to the surface of the limit frame.

[0011] The effect achieved by the above components is: through the setting of the limit plate, the hydraulic telescopic rod abuts the limit frame, so that the position angle of the limit frame changes, and the limit frame is not easy to shake, thereby ensuring the position stability of the side wing plate, better realizing the anti-deformation effect of the limit device, improving the welding effect of the web and the side wing plate, and less prone to welding deformation problems, and also improving the production efficiency and finished product utilization rate of the lower frame.

[0012] Preferably, a sliding block is fixedly connected to the surface of the pressure plate, a sliding groove is provided on the inner wall of the limiting frame, and the sliding block is slidably connected to the inner wall of the sliding groove.

[0013] The effect achieved by the above components is: through the setting of the slider and the slide groove, the pressure plate moves more stably under the rotation of the screw, so as to better form contact and extrusion with the side wing plate, making the side wing plate more convenient for the staff to operate during the welding process, further reducing the possibility of deformation during the welding process, and improving the use effect and practicality of the limit device.

[0014] Preferably, a reinforcement device is provided on the surface of the mounting plate, and the reinforcement device includes two clamping plates, and the cross-section of the two clamping plates is "U"-shaped. The two clamping plates are respectively clamped on the two side surfaces of the mounting plate, and the surfaces of the two clamping plates are respectively threaded with bolts, and the bolts are threadedly connected to the surface of the mounting plate, and the sides of the surfaces of the two clamping plates away from each other are respectively fixedly connected with connecting rods, and the end of the connecting rod away from the clamping plate and the side close to the side wing plate are fixedly connected with an electric telescopic rod, and the output end of the electric telescopic rod is fixedly connected with a resist plate.

[0015] The effect achieved by the above components is: when the side wing plates on the workbench are further protected, the clamping plates are respectively clamped on both sides of the mounting plates on both sides of the web, and then the bolts are threadedly connected to the clamping plates until the bolts are threadedly connected to the mounting plates. Then, when the limiting hydraulic telescopic rod performs anti-deformation limit adjustment on the side wing plates in the limit frame, the electric telescopic rod will extend at the same time, so that the abutment plate fixedly connected to the output end of the electric telescopic rod will form contact and extrusion with the side wing plates, so that the two ends of the side wing plates will not be easily tilted or shaken under the action of the abutment plate during welding, thereby making it more stable during welding, improving the welding forming effect, and also improving the production efficiency of the lower frame, and further avoiding deformation of the lower frame during welding.

[0016] Preferably, a baffle is fixedly connected to one side surface of the abutment plate, the cross section of the baffle is "L"-shaped, and the inner wall of the baffle abuts against one side surface of the side wing plate.

[0017] The effect achieved by the above components is: through the setting of the baffle, when the side wing plate is limited and stabilized by the limiting device, both sides of the side wing plate are simultaneously affected by the contact and abutment effect of the baffle, so that the side wing plate can be better kept stable during the welding process, and the limiting device can have a good anti-deformation effect on the side wing plate as much as possible, thereby improving the welding product effect and utilization rate of the excavator lower frame.

[0018] Preferably, an operating block is fixedly connected to the surface of the bolt, and a plurality of anti-slip protrusions are provided on the surface of the operating block.

[0019] The effects achieved by the above components are: through the setting of the operating block, the use of the bolts is more convenient and quick, and the clamping plate is more conveniently fixed on the mounting plate, which improves the convenience of using the reinforcement device. At the same time, it also facilitates the inspection and maintenance of the parts on the reinforcement device, and it is not easy for the reinforcement device to reduce its effectiveness during use, resulting in excessive deviation of the lower frame parts during welding, making it difficult to use normally.

[0020] Preferably, an adjustment device is provided on the side of the surface of the workbench away from the web, and the adjustment device includes four connecting columns, and the four connecting columns are fixedly connected to the four corners of the surface of the workbench respectively. The surfaces of the four connecting columns are slidably connected with sliding tubes, and the surfaces of the sliding tubes are provided with insertion holes, and the inner walls of the insertion holes are slidably provided with insertion rods, and the surfaces of the four connecting columns are respectively provided with a number of evenly distributed slots, and the insertion rods are plugged into the inner walls of the slots.

[0021] The effect achieved by the above components is: when adjusting the height of the workbench, first slide the connecting columns at the four corners of the workbench surface to make the connecting columns slide in the inner wall of the sliding tube until they are adjusted to a suitable position, and then insert the insertion rod along the socket on the surface of the sliding tube until it is inserted into the slot on the surface of the connecting column. At this time, it is more convenient for the staff to use the limit device, so that the limit device can better fix and adjust the pre-welding position of the side wing plate, thereby improving the convenience and use effect of the limit device, and also reducing the dimensional error and deformation during welding to a certain extent.

[0022] Preferably, a stabilizing plate is fixedly connected to a side of the surface of the sliding tube away from the workbench, and the stabilizing plate is a rubber plate.

[0023] The effect achieved by the above components is: through the setting of the stabilizing plate, the friction force of the sliding tube in contact with the ground is increased, making it difficult for the sliding tube to change its position during support, causing abnormal shaking of the lower frame components on the workbench, affecting the normal welding effect, and better ensuring the realization of the anti-deformation operation of the side wing plate during welding.

[0024] Preferably, a reinforcing rod is fixedly connected to one side of the surfaces of the four connecting columns that are close to each other.

[0025] The effect achieved by the above components is: through the setting of the reinforcement rod, the four connecting columns on the workbench can be kept at the same horizontal height when the workbench is adjusted in height, so as to better adjust the workbench and keep the lower frame components on the workbench in a horizontal state to the greatest extent, which is not easy to deviate and shake during welding. At the same time, it also ensures that the limit device can stably and effectively realize the limit stability of the side wing plate.

[0026] In summary, the beneficial effects of the present invention are:

[0027] During the welding process of the excavator lower frame, the angle applied in advance effectively avoids the deformation effect caused by stress shrinkage during welding, plays a good anti-deformation role, and improves the production efficiency and finished product utilization rate of the lower frame.

[0028] The reinforcement device makes it difficult for both ends of the side wing plate to tilt and shake during welding, thereby making it more stable during welding, improving the welding forming effect, and improving the production efficiency of the lower frame, further avoiding deformation of the lower frame during welding.

[0029] It can make it more convenient for workers to use the limit device, so that the limit device can better fix and adjust the pre-welding position of the side wing plate, improve the convenience and use effect of the limit device, and reduce the dimensional error and deformation during welding to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0031] Figure 2 Schematic diagram of the three-dimensional structure of the limiting device of the present invention;

[0032] Figure 3 For the present invention Figure 2 A schematic diagram of the side three-dimensional structure of ;

[0033] Figure 4 For the present invention Figure 3 A schematic diagram of the side three-dimensional structure of ;

[0034] Figure 5 It is a schematic diagram of the three-dimensional structure of the reinforcing device of the present invention;

[0035] Figure 6 It is a schematic diagram of the three-dimensional structure of the adjusting device of the present invention.

[0036] Legend: 1. Workbench; 2. Web plate; 3. Side plate; 4. Limiting device; 41. Mounting plate; 42. Hydraulic telescopic rod; 43. Rotating frame; 44. Rotating hole; 45. Limiting frame; 46. Screw; 47. Pressure plate; 48. Protective plate; 49. Limiting plate; 410. Slide groove; 411. Slider; 5. Reinforcement device; 51. Card; 52. Bolt; 53. Connecting rod; 54. Electric telescopic rod; 55. Abutment plate; 56. Baffle; 57. Operating block; 6. Adjusting device; 61. Connecting column; 62. Slide tube; 63. Slot; 64. Socket; 65. Insertion rod; 66. Stabilizing plate; 67. Reinforcement rod. DETAILED DESCRIPTION

[0037] Reference Figure 1 and Figure 2 As shown, the present invention provides a technical solution: a stable excavator lower frame welding anti-deformation device, including a workbench 1 and a limiting device 4, the surface of the workbench 1 is provided with a web 2, and the surface of the workbench 1 is located on both sides of the web 2 and is respectively installed with side wing plates 3 through the limiting device 4, the limiting device 4 includes a mounting plate 41, the surface of the mounting plate 41 is provided with a reinforcing device 5, and the surface of the workbench 1 is provided with an adjusting device 6 on the side away from the web 2.

[0038] Reference Figure 1 、 Figure 2 and Figure 3As shown, in this embodiment: the mounting plate 41 is fixedly connected to one side of the workbench 1, the surface of the mounting plate 41 is fixedly connected to a hydraulic telescopic rod 42, the surface of the workbench 1 is located near the two sides of the web 2 and is fixedly connected to a rotating frame 43, the cross section of the rotating frame 43 is "U" shaped, the rotation connection on the arc surface of the rotating frame 43 is limited to the limit frame 45, the side wing plate 3 is clamped on the inner wall of the limit frame 45, the surface of the limit frame 45 is threaded with a screw 46, the screw 46 is close to the inner wall of the limit frame 45 One end of the wall is rotatably connected with a pressure plate 47, which is slidably connected to the inner wall of the limit frame 45. The pressure plate 47 abuts against the surface of the side wing plate 3, and the output end of the hydraulic telescopic rod 42 abuts against the surface of the limit frame 45. When the web 2 and the side wing plate 3 in the lower frame of the excavator are welded and fixed, the web 2 is first fixed to the surface of the workbench 1, and then the two side wing plates 3 are respectively installed in the inner wall of the limit frame 45, and then the screw 46 on the surface of the limit frame 45 is rotated. The rotation of the screw 46 will drive the pressure plate 47 to abut against the surface of the side wing plate 3. The plate 47 moves until the pressure plate 47 contacts and squeezes the side wing plate 3, thereby forming a limit fixation for the side wing plate 3, and then the limit frame 45 is rotated to make the limit frame 45 rotate around the rotating hole 44, so that a certain angle is formed between the web 2 and the side wing plate 3, and at the same time, the output end of the hydraulic telescopic rod 42 on the mounting plate 41 is in abutment with the limit frame 45, and then the hydraulic telescopic rod 42 is started during the welding process of the web 2 and the side wing plate 3, so that the output end of the hydraulic telescopic rod 42 is in abutment with the limit frame 45 during the extension process, so that the limit frame 45 waits for the web 2 to rotate along the rotating frame 43, thereby making the angle between the web 2 and the side wing plate 3 smaller and smaller as the welding work proceeds, until the web 2 and the side wing plate 3 are completely squeezed and tightly fitted when the welding is completed. At this time, during the welding process of the excavator lower frame, the deformation effect caused by stress contraction during the welding process is effectively avoided by the angle applied in advance, which plays a good anti-deformation role and improves the production efficiency and finished product utilization rate of the lower frame.

[0039] Reference Figure 1 、 Figure 2 and Figure 4As shown, in this embodiment: the surface of the pressure plate 47 is fixedly connected to a protective plate 48 on the side away from the screw 46. The protective plate 48 is a sponge plate. Through the setting of the protective plate 48, when the pressure plate 47 contacts and squeezes the side wing plate 3, it is not easy to damage the side wing plate 3 due to excessive contact and squeezing strength, thereby ensuring the welding forming effect of the web 2 and the side wing plate 3, thereby improving the use effect of the limit device 4 and preventing the deformation of the lower frame components during the welding process to the greatest extent. The output end of the hydraulic telescopic rod 42 is fixedly connected to the limit plate 49. The cross-section of the limit plate 49 is "U"-shaped. The inner wall of the limit plate 49 is snap-fitted with the surface of the limit frame 45. Through the setting of the limit plate 49, the hydraulic telescopic rod 42 abuts against the limit frame 45, so that when the position angle of the limit frame 45 changes, The limit frame 45 is not easy to shake, thereby ensuring the stable position of the side wing plate 3, better realizing the anti-deformation effect of the limit device 4, improving the welding effect of the web 2 and the side wing plate 3, and not easily causing the problem of welding deformation, and also improving the production efficiency and finished product utilization rate of the lower frame. The surface of the pressure plate 47 is fixedly connected with a slider 411, and the inner wall of the limit frame 45 is provided with a slide groove 410. The slider 411 is slidably connected to the inner wall of the slide groove 410. Through the setting of the slider 411 and the slide groove 410, the pressure plate 47 moves more stably under the rotation of the screw 46, thereby better forming contact and extrusion with the side wing plate 3, making the side wing plate 3 more convenient for staff to operate during the welding process, further reducing the possibility of deformation during the welding process, and improving the use effect and practicality of the limit device 4.

[0040] Reference Figure 2 and Figure 5As shown, in this embodiment: the reinforcement device 5 includes two clamping plates 51, the cross-section of the two clamping plates 51 is "U"-shaped, the two clamping plates 51 are respectively clamped on the two side surfaces of the mounting plate 41, the surfaces of the two clamping plates 51 are respectively threadedly connected with bolts 52, the bolts 52 are threadedly connected to the surface of the mounting plate 41, the surfaces of the two clamping plates 51 are respectively fixedly connected with connecting rods 53 on the sides away from each other, and the end of the connecting rod 53 away from the clamping plate 51 and the side close to the side wing plate 3 are fixedly connected with an electric telescopic rod 54, and the output end of the electric telescopic rod 54 is fixedly connected with a stop plate 55. When the side wing plates 3 on the workbench 1 are further protected, the mounting plates on both sides of the web 2 are fixedly connected. The clamping plates 51 are respectively clamped on both sides of 41, and then the bolts 52 are threadedly connected to the clamping plates 51 until the bolts 52 are threadedly connected to the mounting plates 41. Then, when the limiting hydraulic telescopic rod 42 performs anti-deformation limit adjustment on the side wing plates 3 in the limit frame 45, the electric telescopic rod 54 will extend at the same time, so that the abutment plates 55 fixedly connected to the output end of the electric telescopic rod 54 will form contact and extrusion with the side wing plates 3, thereby making it difficult for the two ends of the side wing plates 3 to tilt and shake under the action of the abutment plates 55 during welding, thereby making it more stable during welding, improving the welding forming effect, and also improving the production efficiency of the lower frame, further avoiding deformation of the lower frame during welding.

[0041] Reference Figure 1 and Figure 5 As shown, in this embodiment: one side surface of the abutment plate 55 is fixedly connected with a baffle 56, the cross section of the baffle 56 is "L"-shaped, and the inner wall of the baffle 56 abuts against one side surface of the side wing plate 3. Through the setting of the baffle 56, when the side wing plate 3 is limited and stabilized by the limiting device 4, both sides of the side wing plate 3 are simultaneously affected by the contact and abutment effect of the baffle 56, so that the side wing plate 3 can be better kept stable during the welding process, and the limiting device 4 can also play a good anti-deformation effect on the side wing plate 3 as much as possible, thereby improving the welding product quality of the excavator lower frame. In order to improve the effect and utilization rate, the surface of the bolt 52 is fixedly connected with an operating block 57, and the surface of the operating block 57 is provided with a number of anti-slip protrusions. Through the setting of the operating block 57, the use of the bolt 52 is more convenient and quick, and the clamping plate 51 is more conveniently fixed on the mounting plate 41, which improves the convenience of using the reinforcing device 5. At the same time, it is also convenient for the inspection and maintenance of the parts on the reinforcing device 5, and it is not easy for the reinforcing device 5 to have a reduced effect during use, resulting in excessive deviation of the lower frame parts during welding, which makes it difficult to use normally.

[0042] Reference Figure 1 and Figure 6As shown, in this embodiment: the adjusting device 6 includes four connecting columns 61, which are fixedly connected to the four corners of the surface of the workbench 1 respectively, and the surfaces of the four connecting columns 61 are slidably connected to slide tubes 62. The surface of the slide tube 62 is provided with a socket 64, and the inner wall of the socket 64 is slidably inserted with an insertion rod 65. The surfaces of the four connecting columns 61 are respectively provided with a number of evenly distributed slots 63, and the insertion rod 65 is inserted into the inner wall of the slot 63. When the height of the workbench 1 is adjusted, the connecting columns 61 at the four corners of the surface of the workbench 1 are first slid, so that the connecting columns 61 slide in the inner wall of the slide tube 62 until they are adjusted to a suitable position, and then the insertion rod 65 is inserted along the socket 64 on the surface of the slide tube 62 until it is inserted into the slot 63 on the surface of the connecting column 61. At this time, it is more convenient for the staff to use the limit device 4, so that the limit device 4 can better fix and adjust the pre-welding position of the side wing plate 3, improve the convenience and use effect of the limit device 4, and reduce the dimensional error and deformation during welding to a certain extent.

[0043] Reference Figure 1 and Figure 6 As shown, in this embodiment: the surface of the slide tube 62 is fixedly connected to the side of the workbench 1 with a stabilizing plate 66, and the stabilizing plate 66 is a rubber plate. The setting of the stabilizing plate 66 increases the friction between the slide tube 62 and the ground, so that the slide tube 62 is not easy to change its position during support, resulting in abnormal shaking of the lower frame parts on the workbench 1, affecting the normal effect of welding, and better ensuring the realization of the anti-deformation operation of the side wing plate 3 during welding. The surfaces of the four connecting columns 61 are fixedly connected to the side close to each other with a reinforcing rod 67. Through the setting of the reinforcing rod 67, when the workbench 1 is adjusted in height, the four connecting columns 61 on the workbench 1 can be kept at the same horizontal height, thereby better adjusting the workbench 1, so that the lower frame parts on the workbench 1 can be kept in a horizontal state to the greatest extent, and it is not easy to deviate and shake during welding, and at the same time it is ensured that the limit device 4 can stably and effectively realize the stable limit of the side wing plate 3.

[0044] Working principle: When welding and fixing the web 2 and the side wing plate 3 in the lower frame of the excavator, first adjust the height of the workbench 1, first slide the connecting columns 61 at the four corners of the surface of the workbench 1, so that the connecting columns 61 slide in the inner wall of the slide tube 62 until they are adjusted to a suitable position, and then insert the insertion rod 65 along the insertion hole 64 on the surface of the slide tube 62 until it is inserted into the slot 63 on the surface of the connecting column 61. At this time, it is more convenient for the staff to use the limit device 4, so that the limit device 4 can better fix and adjust the pre-welding position of the side wing plate 3, thereby improving the convenience and use effect of the limit device 4. To a certain extent, the dimensional error and deformation during welding are reduced. Then, the web 2 is fixed to the surface of the workbench 1, and then the two side wing plates 3 are respectively installed in the inner wall of the limit frame 45. Then, the screw 46 on the surface of the limit frame 45 is rotated. The rotation of the screw 46 will drive the pressure plate 47 to move until the pressure plate 47 contacts and squeezes the side wing plate 3, thereby forming a limit fixation for the side wing plate 3. Then, the limit frame 45 is rotated again to rotate the limit frame 45 around the rotating hole 44, so that a certain angle is formed between the web 2 and the side wing plate 3, and at the same time, the output end of the hydraulic telescopic rod 42 on the mounting plate 41 is aligned with the limit frame 4. 5 forms an abutment state, and then the clamping plates 51 are respectively clamped on both sides of the mounting plates 41 on both sides of the web 2, and then the fixed connection operation block 57 on the bolt 52 is turned to thread the bolt 52 and the clamping plate 51 until the bolt 52 is threadedly connected to the mounting plate 41. Then, when the limiting hydraulic telescopic rod 42 performs anti-deformation limit adjustment on the side wing plate 3 in the limit frame 45, the electric telescopic rod 54 will extend at the same time, so that the abutment plate 55 fixedly connected to the output end of the electric telescopic rod 54 will form contact and extrusion with the side wing plate 3, and at the same time, the baffle 56 fixedly connected to the abutment plate 55 will contact the side of the web 2, and then the web 2 and the side wing plate 3 will be pressed together. During the welding process of the wing plate 3, the hydraulic telescopic rod 42 is started, so that the output end of the hydraulic telescopic rod 42 abuts the limit frame 45 during the extension process, so that the limit frame 45 rotates along the rotating frame 43 with the web 2, and then the angle between the web 2 and the side wing plate 3 becomes smaller and smaller as the welding work progresses, until the web 2 and the side wing plate 3 are completely squeezed and tightly fitted when the welding is completed. At this time, during the welding process of the excavator lower frame, the deformation effect caused by stress contraction during the welding process is effectively avoided by applying the angle in advance, which plays a good anti-deformation role and improves the production efficiency and finished product utilization rate of the lower frame.

Claims

1. A stable excavator lower frame welding anti-deformation device, comprising a workbench (1) and a limiting device (4), characterized in that: The surface of the workbench (1) is provided with a web (2), and the workbench (1) The surface of the web (2) is located on both sides thereof and is provided with side wing plates (3) respectively through limiting devices (4). The limiting device (4) comprises a mounting plate (41), and the mounting plate (41) is fixedly connected to the workbench (1). On one side, a hydraulic telescopic rod (42) is fixedly connected to the surface of the mounting plate (41), and the workbench The surface of (1) is located near the two sides of the web (2) and is fixedly connected to a rotating frame (43). The cross section of the rotating frame (43) is U-shaped, and the rotating connection on the arc surface of the rotating frame (43) has The limiting frame (45) is provided with the side wing plate (3) being clamped on the inner wall of the limiting frame (45). The limiting frame (45) is provided with the side wing plate (3) being clamped on the inner wall of the limiting frame (45). The surface of the screw (46) is threadedly connected, and the screw (46) is close to the inner wall of the limit frame (45). One end is rotatably connected to a pressing plate (47), and the pressing plate (47) is slidably connected to the inner wall of the limiting frame (45). The pressure plate (47) abuts against the surface of the side wing plate (3), and the output end of the hydraulic telescopic rod (42) Abutting against the surface of the limit frame (45); the surface of the pressing plate (47) is away from the side of the screw (46) A protective plate (48) is fixedly connected, and the protective plate (48) is a sponge plate; the hydraulic telescopic rod (42) The output end is fixedly connected to a limit plate (49), the cross section of the limit plate (49) is "U" shaped, The inner wall of the limiting plate (49) is engaged with the surface of the limiting frame (45); the surface of the pressing plate (47) is fixed The inner wall of the limit frame (45) is provided with a sliding groove (410). The block (411) is slidably connected to the inner wall of the slide groove (410); the surface of the mounting plate (41) is provided with a Strengthening device (5), the strengthening device (5) includes two clamping plates (51), the two clamping plates (51) The cross section is U-shaped, and the two clamping plates (51) are respectively clamped on the two side surfaces of the mounting plate (41). The surfaces of the two clamping plates (51) are respectively threadedly connected with bolts (52), and the bolts (52) are connected to the mounting holes. The surface of the mounting plate (41) is threadedly connected, and the surfaces of the two clamping plates (51) are respectively A connecting rod (53) is fixedly connected, wherein the end of the connecting rod (53) is away from the clamping plate (51) and is close to the clamping plate (51). One side of the proximal wing plate (3) is fixedly connected to an electric telescopic rod (54), the electric telescopic rod (54) The output end is fixedly connected to a support plate (55); a baffle (56) is fixedly connected to a side surface of the support plate (55). The cross section of the baffle (56) is L-shaped, and the inner wall of the baffle (56) and the side wing plate (3) are The side surfaces are in contact; the surface of the bolt (52) is fixedly connected with an operating block (57), the operating block The surface of (57) is provided with a plurality of anti-slip protrusions; the surface of the workbench (1) is away from the web (2) An adjusting device (6) is provided on one side, and the adjusting device (6) includes four connecting columns (61), four The connecting columns (61) are fixedly connected to the four corners of the surface of the workbench (1). The surfaces of the columns (61) are slidably connected to the slide tubes (62), and the surfaces of the slide tubes (62) are provided with plugs. The inner wall of the insertion hole (64) is provided with an insertion rod (65) for sliding insertion, and the four connecting columns (61) The surface of the device is provided with a plurality of evenly distributed slots (63), and the insertion rods (65) and the slots (63) are connected. The surface of the sliding tube (62) is fixedly connected to a stable Plate (66), the stabilizing plate (66) is a rubber plate; the surfaces of the four connecting columns (61) are close to each other A reinforcing rod (67) is fixedly connected to the near side.

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