Welding preheating device for shovel teeth of excavator

Abstract

The utility model discloses an excavator relieved tooth welding preheating device which comprises a working table, supports, a top plate, a driving air cylinder, a clamping jaw air cylinder, a positioning assembly and an electric heating belt, the supports are arranged on the two sides of the working table in the longitudinal direction, and the top plate is fixedly connected with the tops of the supports on the two sides. The driving air cylinder is arranged at the top of the top plate, a piston rod of the driving air cylinder downwards penetrates through the top plate, a connecting plate is arranged at the end of the piston rod, the clamping jaw air cylinder is arranged at the bottom of the connecting plate, the two sides of the clamping jaw air cylinder are each provided with a positioning assembly, and the electric heating belts are arranged on the inner walls of the positioning assemblies. The shovel plate is positioned through the positioning through groove in the workbench, the positioning assembly is driven by the driving air cylinder to move downwards, then the positioning assembly is driven by the clamping jaw air cylinder to be close to one side of the shovel tooth, the outer wall of the shovel tooth is wrapped with the electric heating belt, and therefore the shovel tooth and metal around the shovel tooth are heated; the whole process only needs about half a minute, and the preheating efficiency is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding preheating of an excavator bucket, in particular to a welding preheating device for an excavator tooth. Background Art

[0002] The shovel plate and the shovel teeth of an excavator are usually connected by a welding process. Before welding, the welding part usually needs to be preheated. The main purposes of preheating are: (1) slowing down the cooling speed after welding, which is beneficial to the escape of diffusible hydrogen in the weld metal and avoids the generation of hydrogen-induced cracks; (2) reducing the hardening degree of the weld and the heat-affected zone and improving the crack resistance of the welding area; (3) reducing the welding stress and improving the structural strength after welding.

[0003] At present, the industry generally uses the method of wrapping an electric heating belt to heat the shovel plate and the shovel teeth. When wrapping, it is necessary to first position the shovel teeth on the shovel plate, and wrap the electric heating belt on both the front and back sides of the shovel teeth respectively, and then connect the electric heating belt to the induction heating equipment, and control the heating temperature and heating time of the electric heating belt through the induction heating equipment; after heating is completed, the heating belt is removed from both sides of the shovel teeth, and the next wrapping operation is prepared.

[0004] The entire operation process is completely completed manually, which not only consumes labor, but also has low efficiency in wrapping and disassembling. It takes 2-3 minutes to wrap and disassemble the electric heating belt at one shovel tooth position. The more shovel teeth there are, the longer the time consumed. Therefore, this relatively backward production method needs to be improved. Summary of the Utility Model

[0005] In order to solve the above technical problems, the utility model discloses a welding preheating device for an excavator tooth, which includes a workbench, a bracket, a top plate, a driving cylinder, a jaw cylinder, a positioning component and an electric heating belt. The brackets are arranged longitudinally on both sides of the workbench. The top plate is arranged parallel to the workbench and its two ends are respectively fixedly connected to the tops of the brackets on both sides. The driving cylinder is arranged on the top of the top plate and its piston rod penetrates through the top plate downward. A connecting plate is provided at the end of the piston rod. The jaw cylinder is arranged at the bottom of the connecting plate. A positioning component is provided on each side of the jaw cylinder. The electric heating belt is arranged on the inner wall of the positioning component. A positioning through groove is provided on the workbench.

[0006] Furthermore, the positioning component includes an upper positioning plate and a lower positioning plate. A connecting sleeve is provided at each of the two ends of the bottom of the upper positioning plate. A connecting shaft is provided at the middle position of the top of the lower positioning plate. A locking rod is provided at each end of the connecting shaft. The locking rod passes through the connecting sleeve and the end is locked by a nut.

[0007] Further, a groove is provided at each end of the connecting shaft. A positioning groove is provided inside the groove. A positioning block is provided at the end of the connecting shaft near the groove side, and the positioning block is arranged in the positioning groove.

[0008] Further, the outer side of the jaw of the jaw cylinder is fixedly connected to the upper positioning plate by bolts, and a heat insulation plate is provided between the jaw and the upper positioning plate.

[0009] Further, a cross beam is further provided at the bottom of the workbench. Two limiting plates are symmetrically and spaced longitudinally on the cross beam, and the interval position and width formed between the two limiting plates are matched with the positioning through groove.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] The welding preheating device for the excavator tooth of the present utility model positions the shovel plate through the positioning through groove on the workbench, drives the positioning component to move downward through the driving cylinder, and then drives the positioning component to approach the tooth side through the jaw cylinder, so that the electric heating belt is wrapped on the outer wall of the tooth, thereby heating the tooth and the surrounding metal. Compared with the traditional manual wrapping method of the electric heating belt, the automatic wrapping method of the present utility model only takes about half a minute, significantly improving the preheating efficiency. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0013] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0014] Figure 2 It is a side view of the overall structure of the present utility model;

[0015] Figure 3 It is an exploded view of the partial structure of the positioning component in the present utility model;

[0016] Figure 4 It is a side view of the structure of the jaw cylinder and the positioning component in the present utility model;

[0017] Figure 5 It is a schematic diagram of the use state of the present utility model.

[0018] Reference Signs:

[0019] 1 - Workbench, 2 - Bracket, 3 - Top plate, 4 - Driving cylinder, 5 - Claw cylinder, 51 - Claw, 6 - Positioning assembly, 61 - Upper positioning plate, 62 - Lower positioning plate, 63 - Connecting sleeve, 64 - Connecting shaft, 65 - Locking rod, 66 - Nut, 67 - Groove, 68 - Positioning groove, 69 - Positioning block, 7 - Electric heating tape, 8 - Connecting plate, 9 - Positioning through groove, 10 - Cross beam, 11 - Limiting plate, 12 - Bolt, 13 - Heat insulation plate, 14 - Shoveling plate, 15 - Shoveling tooth. Detailed implementation manner

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, the directional indications will also change accordingly.

[0022] In the description of the embodiments, unless otherwise clearly specified and limited, terms such as "set" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or connected through an intermediate medium, or the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0023] As Figure 1-2 shown, the welding preheating device for the shoveling teeth of an excavator in this embodiment includes a workbench 1, a bracket 2, a top plate 3, a driving cylinder 4, a claw cylinder 5, a positioning assembly 6, and an electric heating tape 7; the brackets 2 are arranged longitudinally on both sides of the workbench 1, the top plate 3 is arranged parallel to the workbench 1 and its two ends are respectively fixedly connected to the tops of the brackets 2 on both sides; the driving cylinder 4 is arranged on the top of the top plate 3 and its piston rod penetrates downward through the top plate 3, and a connecting plate 8 is provided at the end of the piston rod, the claw cylinder 5 is arranged at the bottom of the connecting plate 8, and a positioning assembly 6 is provided on each side of the claw cylinder 5, and the electric heating tape 7 is arranged on the inner wall of the positioning assembly 6; the driving cylinder 4 can drive the connecting plate 8, the claw cylinder 5, the positioning assembly 6, and the electric heating tape 7 to move up and down as a whole, and the claw cylinder 5 can drive the positioning assemblies 6 on both sides to approach or separate simultaneously.

[0024] A positioning through groove 9 is provided on the workbench 1, and a cross beam 10 is further provided at the bottom of the workbench 1. Two limiting plates 11 are symmetrically and spaced longitudinally on the cross beam 10, and the interval position and width formed between the two limiting plates 11 match the positioning through groove 9.

[0025] As Figure 3 shown, the positioning assembly 6 includes an upper positioning plate 61 and a lower positioning plate 62. At both ends of the bottom of the upper positioning plate 61, a connecting sleeve 63 is provided respectively. At the middle position of the top of the lower positioning plate 62, a connecting shaft 64 is provided. At both ends of the connecting shaft 64, a locking rod 65 is provided respectively. The locking rod 65 passes through the connecting sleeve 64 and the end is locked by a nut 66.

[0026] At both ends of the connecting shaft 64, a groove 67 is provided respectively. A positioning groove 68 is provided inside the groove 67. At the end of the connecting shaft 64 close to the groove 67, a positioning block 69 is provided. The positioning block 69 is arranged in the positioning groove 68.

[0027] When assembling the positioning assembly 6, first place the connecting shaft 64 between the connecting sleeves 63 on both sides, and align the groove 67 with the central hole of the connecting sleeve 63. Then pass the locking rod 65 through the central hole and the groove 67, so that the positioning block 69 enters the positioning groove 68. Finally, screw the nut 67 onto the thread at the end of the connecting shaft 64, and the inner end face of the nut 67 tightly presses against the outer end face of the connecting sleeve 63, thereby locking the positions of the upper positioning plate 61 and the lower positioning plate 62.

[0028] After loosening the nut 67, the lower positioning plate 62 can be rotated to change the included angle between the upper positioning plate 61 and the lower positioning plate 62, so as to adapt to the wrapping requirements of shovel teeth of different shapes.

[0029] As Figure 4 shown, on the outside of the jaw 51 of the jaw cylinder 5, it is fixedly connected to the upper positioning plate 61 through a bolt 12, and a heat insulation plate 13 is provided between the jaw 51 and the upper positioning plate 61.

[0030] Among them, the upper positioning plate 61, the lower positioning plate 62 and the heat insulation plate 13 can adopt heat insulation materials such as wooden boards, rock wool boards, and glass fiber boards to minimize the transfer of the heat of the electric heating tape 7.

[0031] As Figure 5 shown, when the utility model is in use, first insert the shovel plate 14 along the positioning through groove 9 between the two limiting plates 11 at the bottom, position the shovel plate 14 through the positioning through groove 9 and the limiting plates 11, and then place the shovel teeth 15 one by one at the positions to be welded; then drive the cylinder 4 to drive the positioning assembly 6 to move downward until it moves to both sides of the shovel teeth 15, and then the jaw cylinder 5 drives the positioning assembly 6 to move closer to one side of the shovel teeth 15, so that the electric heating tape 7 wraps around the outer wall of the shovel teeth 15, thereby heating the shovel teeth 15 and the surrounding metal.

[0032] After the heating is completed, the jaw cylinder 5 first drives the positioning assembly 6 to separate, and then the driving cylinder 4 drives the positioning assembly 6 to reset upward. Then, the welding operation can be performed on the cutting teeth 15 and the cutting plate 14.

[0033] Compared with the traditional method of manually wrapping and removing the electric heating tape, the utility model automatically operates through the driving cylinder 4 and the jaw cylinder 5, and can wrap multiple cutting teeth 15 at one time without wrapping them one by one. The whole operation process only takes about half a minute, thus significantly improving the preheating efficiency.

[0034] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement; when the combination of technical solutions conflicts with each other or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

Claims

1. An excavator bucket tooth welding preheating device, characterized in that: It includes a workbench, brackets, a top plate, a driving cylinder, a jaw cylinder, a positioning assembly and an electric heating belt. The brackets are longitudinally arranged on both sides of the workbench. The top plate is arranged parallel to the workbench and its two ends are respectively fixedly connected to the tops of the brackets on both sides. The driving cylinder is arranged on the top of the top plate and its piston rod penetrates downward through the top plate. A connecting plate is provided at the end of the piston rod. The jaw cylinder is arranged at the bottom of the connecting plate. A positioning assembly is provided on each side of the jaw cylinder. The electric heating belt is arranged on the inner wall of the positioning assembly. A positioning through groove is provided on the workbench.

2. The preheating device for welding the excavator bucket teeth according to claim 1, wherein: The positioning assembly includes an upper positioning plate and a lower positioning plate. A connecting sleeve is provided at each of the two ends of the bottom of the upper positioning plate. A connecting shaft is provided at the middle position of the top of the lower positioning plate. A locking rod is provided at each of the two ends of the connecting shaft. The locking rod passes through the connecting sleeve and its end is locked by a nut.

3. The welding preheating device for the excavator bucket teeth according to claim 2, characterized in that: A groove is provided at each of the two ends of the connecting shaft. A positioning groove is provided inside the groove. A positioning block is provided at the end of the connecting shaft close to the groove side. The positioning block is arranged in the positioning groove.

4. The preheating device for welding the excavator bucket teeth according to claim 2, characterized in that: The outside of the jaws of the jaw cylinder is fixedly connected to the upper positioning plate by bolts. A heat insulation plate is provided between the jaws and the upper positioning plate.

5. The welding preheating device for the excavator bucket tooth according to claim 1, characterized in that: A cross beam is further provided at the bottom of the workbench. Two limiting plates are symmetrically and spaced longitudinally on the cross beam. The interval position and width formed between the two limiting plates match the positioning through groove.

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