Efficient assembly welding tooling for excavator boom front fork

Abstract

The utility model relates to the technical field of welding tooling, and in particular to an efficient assembly welding tooling for the front fork of an excavator boom, which includes a base plate and a central axis, wherein the center of the base plate is provided with an angle pad whose top matches the inner angle of the front fork bent plate, and side plate heads supporting the left and right side plates are provided on the left and right sides of the angle pad, and the base plate is also provided with a front bracket and a rear bracket, wherein the front bracket and the rear bracket are provided with locking plate one, locking plate two and locking plate three in sequence from bottom to top, and the three locking plates are all threadedly connected with set screws that resist the front fork of the boom; the two ends of the central axis are coaxially fitted with the shaft holes of the left and right side plates through movable plugs, and a card plate is used to locate the spacing between the left and right side plates. The welding tooling can quickly locate the front fork bent plate, as well as the spacing and coaxiality of the left and right plates, realize efficient assembly, and prevent deformation during welding.

Description

Technical Field

[0001] The utility model relates to the technical field of welding tooling, in particular to a high-efficiency assembly welding tooling for an excavator boom front fork. Background Art

[0002] The boom is the most basic structural part among the three major motion mechanisms of the excavator, and the boom front fork, as the hinge connection unit of the boom and the dipper arm of the two major motion mechanisms, bears a variety of alternating loads such as tension, pressure and bending moment. In order to ensure the strength of the boom front fork, it is usually welded with steel plates that are much thicker than the boom, that is, the boom and the boom front fork are usually welded separately first, and then the two are butt-welded together. Among them, the boom front fork includes a front fork bend plate, and left and right side plates welded on both sides of the front fork bend plate. When welding the boom front fork, due to welding deformation, especially thick plate welding, more welding stress will be generated, causing greater deformation. In order to ensure welding efficiency and ensure the accuracy of the finished product, a reliable welding tooling is required. Utility Model Content

[0003] The purpose of the utility model is to address the deficiencies of the prior art and to provide an efficient assembly welding tool for the front fork of an excavator boom, which uses a pad with the same angle as the bent plate to position the front fork bent plate, and uses a central axis to ensure the coaxiality and spacing of the pin holes of the left and right plates of the front fork, so as to quickly assemble the various components of the boom front fork, and then uses a clamping mechanism to prevent welding deformation, thereby ensuring the accuracy of the finished product.

[0004] The technical solution adopted by the utility model to solve its technical problems is: an efficient assembly welding tool for the front fork of an excavator boom, comprising a base plate and a central axis, an angle pad whose top matches the inner angle of a front fork bent plate is arranged at the center of the base plate, and side plate tops supporting left and right side plates are arranged on the left and right sides of the angle pad, the base plate is also provided with a front bracket and a rear bracket, the front bracket and the rear bracket are sequentially provided with a locking plate one, a locking plate two and a locking plate three from bottom to top, and the three locking plates are all threadedly connected with a fixing screw that resists the front fork of the boom; the two ends of the central axis are coaxially fitted with the axial holes of the left and right side plates through movable plugs, and a clamping plate is used to locate the spacing between the left and right side plates.

[0005] Preferably, after the front fork bent plate is positioned on the angle pad, the base feet on both sides thereof are suspended in the air.

[0006] Preferably, the angle pad is in an inverted Π shape, and has two surfaces on both sides that abut against the inner inclined surface of the front fork curved plate. The angle between the inclined surfaces on both sides of the angle pad is equal to the angle of the front fork curved plate.

[0007] Preferably, the side plate top is threadedly connected to the side plate top seat fixed to the bottom plate. Each side of the angle pad has at least two side plate tops, and the side plate tops can be bolted with caps.

[0008] Preferably, the central axis is thickest in the middle and symmetrical at both ends, and has a fitting section and a locking section with successively decreasing diameters. The fitting section is fitted with the clamping plate and the movable plug that are limited and fitted with the pin shaft holes of the left and right plates of the front fork, and the locking section is threadedly connected with a locking nut.

[0009] Preferably, two ends of the locking plate three are fixed to the front bracket and the rear bracket, the set screw is arranged in the middle of the locking plate three, and the thickness of the locking plate three is greater than 30 mm.

[0010] Preferably, a single-sided V-shaped groove is formed at the welding point between the front fork bent plate and the left and right plates.

[0011] Preferably, two layers of single-sided V-shaped grooves are opened at the connection between the front fork bent plate, the left and right plates and the movable arm, and groove pads are arranged on the inner sides of the front fork bent plate and the left and right plates.

[0012] The beneficial effects of the utility model are: an efficient assembly welding tool for the front fork of the excavator boom, which includes a base plate and a central axis, an angle pad whose top matches the inner angle of the front fork bent plate is arranged in the center of the base plate, and side plate heads supporting the left and right side plates are arranged on the left and right sides of the angle pad, the base plate is also provided with a front bracket and a rear bracket, the front bracket and the rear bracket are provided with locking plate one, locking plate two and locking plate three from bottom to top, and the three locking plates are all threadedly connected with set screws that resist the front fork of the boom; the two ends of the central axis are coaxially matched with the shaft holes of the left and right side plates through movable plugs, and a card plate is used to locate the spacing between the left and right side plates. This welding tool can quickly locate the front fork bent plate, as well as the spacing and coaxiality of the left and right plates, achieve efficient assembly, and prevent deformation during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional diagram of the high-efficiency assembly welding tooling for the front fork of the excavator boom of the utility model;

[0014] Figure 2 It is a main sectional view of the high-efficiency assembly welding tooling for the front fork of the excavator boom of the utility model;

[0015] Figure 3 It is a cross-sectional view from another perspective of the utility model.

[0016] Description of reference numerals:

[0017] 1 - bottom plate, 2 - center axis, 21 - fitting section, 22 - locking section, 23 - clamping plate, 24 - movable plug, 3 - angle pad, 4 - side plate top, 5 - front bracket, 6 - rear bracket, 7 - locking plate one, 8 - locking plate two, 9 - locking plate three, 10 - set screws. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the scope of implementation of the present invention is not limited thereto.

[0019] like Figures 1 to 3 As shown, the efficient assembly welding tooling for the front fork of the excavator boom of this embodiment comprises a base plate 1 and a central axis 2. An angle pad 3 whose top matches the inner angle of the front fork bend plate is arranged at the center of the base plate 1, and side plate tops 4 supporting the left and right side plates are arranged on the left and right sides of the angle pad 3. The base plate 1 is also provided with a front bracket 5 and a rear bracket 6. The front bracket 5 and the rear bracket 6 are provided with a locking plate 1 7, a locking plate 2 8 and a locking plate 3 9 from bottom to top in sequence. The three locking plates are all threadedly connected with a set screw 10 that resists the front fork of the boom; the two ends of the central axis 2 are coaxially mounted with the axial holes of the left and right side plates through movable plugs 24, and a clamping plate 23 is used to locate the spacing between the left and right side plates.

[0020] This embodiment takes the assembly and welding of the front fork of an excavator boom as an example, and designs the assembly and welding tooling to improve the assembly and welding efficiency of the front fork of the boom and other similar arm-type articulated joints and to ensure the welding accuracy. During operation, first use the center axis 2 with the clamping plate 21, the movable plug 22 and the locking nut to assemble the left and right plates of the front fork with their pin holes, so as to locate the spacing between the left and right plates of the front fork and make the two pin holes coaxial; during welding and assembly, first place the front fork bent plate on the angle pad 3, so that the angles of the two are consistent and do not shake, so as to preliminarily position the bent plate, and then place the assembled left and right plates of the front fork on both sides of the bent plate, and adjust the height with the side plate top 4, while fine-tuning the front fork bent plate, and tighten the set screws 10 on the locking plate 1 7 to tighten the front fork bent plate, and then tighten the set screws 10 on the locking plate 2 8 and the locking plate 3 9 to tighten the left and right plates of the front fork; the third step is to fully weld each weld; the fourth step is to remove the welded front fork from the tooling, repair the inner weld between the bent plate and the left and right plates, and correct it.

[0021] In order to facilitate the center shaft 2 to be fitted with the left and right plates of the front fork, the center shaft 2 is the thickest in the middle and symmetrical at both ends, and has a fitting section 21 and a locking section 22 with successively decreasing diameters. The fitting section 21 is fitted with the clamping plate 23 and the movable plug 24 that are limited and fitted with the pin shaft holes of the left and right plates of the front fork, and the locking section 22 is threadedly connected with a locking nut.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, and for the convenience of describing the technical solution, the front, rear, left, right, top, middle, and bottom directions adopted are based on the settings in the accompanying drawings, rather than limiting the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. High-efficiency assembly and welding tooling for the front fork of the excavator boom, characterized by: It includes a bottom plate and a center axis, wherein an angle pad whose top matches the inner angle of the front fork bent plate is arranged in the center of the bottom plate, and side plate tops supporting the left and right side plates are arranged on the left and right sides of the angle pad, and the bottom plate is also provided with a front bracket and a rear bracket, and the front bracket and the rear bracket are provided with locking plate one, locking plate two and locking plate three from bottom to top in sequence, and the three locking plates are all threadedly connected with fixing screws that resist the front fork of the boom; the two ends of the center axis are coaxially mounted with the axial holes of the left and right side plates through movable plugs, and a clamping plate is used to locate the distance between the left and right side plates.

2. The efficient assembly and welding tool for the front fork of the excavator boom according to claim 1 is characterized in that: After the front fork bent plate is positioned on the angle pad, the bottom feet on both sides thereof are suspended in the air.

3. The efficient assembly and welding tool for the front fork of the excavator boom according to claim 1 is characterized in that: The angle pad is in the shape of an inverted Π, and has two surfaces on both sides that abut against the inner inclined surface of the front fork bent plate.

4. The efficient assembly and welding tool for the front fork of an excavator boom according to claim 1 is characterized in that: The side plate top is threadedly connected to a side plate top seat fixed to the bottom plate.

5. The efficient assembly and welding tool for the front fork of the excavator boom according to claim 1 is characterized in that: The central shaft is thickest in the middle and symmetrical at both ends, and comprises a fitting section and a locking section with successively decreasing diameters. The fitting section is sleeved with the movable plug and the clamping plate, and the locking section is threadedly connected with a locking nut.

6. The efficient assembly and welding tool for the front fork of an excavator boom according to claim 1, characterized in that: The two ends of the locking plate three are fixed to the front bracket and the rear bracket, the set screw is arranged in the middle of the locking plate three, and the thickness of the locking plate three is greater than 30 mm.

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