Clamp for welding fixing pad of chain wheel supporting plate of oversized special-shaped tank body

Abstract

The utility model provides a fixture for welding a fixing pad of a chain wheel supporting plate of an oversized special-shaped tank body, which comprises a process plate which is an annular plate, the inner diameter of the process plate is larger than the diameter of a barrel to be welded at two ends of the oversized special-shaped tank body, and the process plate is configured to axially and circumferentially position the fixing pad of the chain wheel supporting plate to be welded; the process block comprises a pair of arc surfaces which are oppositely arranged, and the process block is configured to be matched with the annular inner diameter of the process plate to fix the process plate to the to-be-welded barrel in a tight padding mode; the bent plate is detachably connected to the process plate and comprises a fixing face and a clamping face perpendicular to the fixing face, the fixing face abuts against the annular face of the process plate, the clamping face is arranged close to the to-be-welded barrel, and a clamping space for containing and clamping a to-be-welded chain wheel supporting plate fixing pad is reserved between the clamping face and the to-be-welded barrel. According to the utility model, the chain wheel supporting plate fixing pad is effectively clamped and positioned by adopting a reference conversion method, so that post-welding processing of the chain wheel supporting plate fixing pad is changed into pre-welding processing, and the safety and the processing efficiency are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of machining, and in particular to a fixture for welding the fixing pad of the sprocket support plate of an extra-large irregular tank. Background Technology

[0002] A massive, irregularly shaped tank, 7 meters long and weighing 30 tons, is drum-shaped and welded together from five parts. The middle and both ends are cylindrical, with the middle section larger than the ends. Two conical sections connect the large and small cylinders. The outer diameter of the middle cylinder is 4 meters, and the outer diameter of the two end cylinders is 1 meter. Each end cylinder has a welded-on rolling pad, serving as the drive-end rolling pad and the driven-end rolling pad, respectively. The outer diameter of the drive-end cylinder also has a welded-on sprocket support plate fixing pad 4, used for connection to the sprocket support plate and the sprocket drive. The sprocket transmits power to the tank through the sprocket support plate and fixing pad, causing the tank to rotate. To facilitate power transmission, the sprocket support plate fixing pads 4 need to be staggered around the circumference of the tank. To ensure precise sprocket positioning, the planes and mating holes of the sprocket support plate fixing pads 4 are generally machined after welding. However, because the tank is larger in the middle and smaller at both ends, its center of gravity is high, making it prone to tipping over, resulting in significant risks during post-weld machining. Utility Model Content

[0003] To achieve precise positioning of the sprocket support plate fixing pad, thereby changing the post-weld processing of the sprocket support plate fixing pad in traditional technology to pre-weld processing to improve safety, this utility model proposes a fixture for welding the sprocket support plate fixing pad of an oversized irregular tank. The fixture includes: a process plate, which is an annular plate with an inner diameter larger than the diameter of the cylindrical bodies to be welded at both ends of the oversized irregular tank, configured to position the sprocket support plate fixing pad to be welded axially and circumferentially; a process block, which includes a pair of opposing arc surfaces, configured to fit the annular inner diameter of the process plate to fix the process plate to the cylindrical body to be welded in a padded manner; and a bent plate, which is detachably connected to the process plate and includes a fixing surface and a clamping surface. The fixing surface abuts against the annular surface of the process plate, and the clamping surface is positioned closer to the cylindrical body to be welded than the fixing surface, leaving a clamping space between them. The clamping space is configured to place and clamp the sprocket support plate fixing pad to be welded.

[0004] In one or more embodiments, the annular surface of the process plate is provided with equally spaced positioning holes.

[0005] In one or more embodiments, the positioning hole includes a single-hole positioning hole or a double-hole positioning hole.

[0006] In one or more embodiments, the process block is a trapezoidal platform, the first trapezoidal surface of which is an arc surface that matches the annular inner diameter of the process plate, and the inner surface of the second trapezoidal surface is a plane, configured to axially limit the process plate.

[0007] In one or more embodiments, the thickness of the first trapezoidal surface is slightly greater than the difference between the annular radius of the process plate and the radius of the cylinder to be welded.

[0008] In one or more embodiments, both the fixing surface and the clamping surface are provided with engagement holes, which are configured to be detachably connected to the process plate and the fixing pad of the sprocket support plate to be welded, respectively.

[0009] In one or more embodiments, the engagement hole is a pin hole or a threaded hole.

[0010] In one or more embodiments, each of the bent plates has at least three clamping holes arranged in a triangular pattern on its clamping surface.

[0011] In one or more embodiments, the fixture for welding the fixing pad of the sprocket support plate of the extra-large irregular tank of this utility model further includes: a pin or bolt used in conjunction with the engagement hole.

[0012] In one or more embodiments, the fixture for welding the fixing pad of the sprocket support plate of the extra-large irregular tank of this utility model has multiple process blocks and multiple bent plates, and the multiple bent plates have clamping surfaces of multiple lengths.

[0013] The beneficial effects of this utility model include: This utility model adopts a reference conversion method, which positions the process plate by designing process blocks, then positions the bending plate by the positioning holes of the process plate, and finally positions the sprocket support plate fixing pad by the engagement hole of the bending plate. This indirectly ensures the processing size and position of the plane of the sprocket support plate fixing pad and the engagement hole, avoiding the risks brought about by post-weld processing using a large boring machine. In addition, this utility model also has the characteristics of firm clamping and convenient alignment, which can greatly improve the assembly efficiency of the sprocket support plate fixing pad for ultra-large irregular tanks. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the assembly structure of the fixture for welding the fixing pad of the sprocket support plate of the extra-large irregular tank according to an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the process plate according to an embodiment of the present utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the process block in an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of the structure of the bent plate according to an embodiment of the present utility model;

[0019] Figure 5 This is a top view of the sprocket support plate fixing pad according to an embodiment of the present utility model.

[0020] The meanings of the reference numerals in the above descriptions of the figures are as follows:

[0021] Process plate 10, positioning hole 11, process block 20, first trapezoidal surface 21, second trapezoidal surface 22, bending plate 30, fixing surface 31, clamping surface 32, transmission cylinder 1, transmission end rolling ring pad 2, passive end rolling ring pad 3, sprocket support plate fixing pad 4. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be further described in detail below with reference to specific examples and accompanying drawings.

[0023] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0024] To achieve effective clamping and precise positioning of the sprocket support plate fixing pad, the post-weld processing of the sprocket support plate fixing pad in traditional technology is changed to pre-weld processing to improve safety. This utility model proposes a fixture for welding the sprocket support plate fixing pad of an extra-large irregularly shaped tank. The fixture mainly consists of three separate parts, and the structure of the three separate parts and their connection relationship will be described below through specific embodiments.

[0025] like Figure 1As shown, the welding fixture for the sprocket support plate fixing pad of the oversized irregular tank in this embodiment includes: a process plate 10, which is an annular plate with an inner diameter larger than the diameter of the cylinder to be welded at both ends of the oversized irregular tank, and is configured to position the sprocket support plate fixing pad to be welded axially and circumferentially; a process block 20, which includes a pair of arc surfaces arranged opposite to each other, and is configured to fix the process plate 10 to the cylinder to be welded by means of padding the annular inner diameter of the process plate 10; and a bending plate 30, which includes a fixing surface 31 and a clamping surface 32. The fixing surface 31 abuts against the annular surface of the process plate 10, and the clamping surface 32 is set closer to the cylinder to be welded than the fixing surface and has a clamping space between it and the cylinder to be welded. The clamping space is configured to place the sprocket support plate fixing pad 4 to be welded and clamp and fix it.

[0026] In use, the process plate 10 must first be inserted into the transmission end 1 of the irregularly shaped tank, and the process plate 10 is fixed in a suitable position using process blocks. Then, the fixing surface 31 of the bent plate 30 is fixedly connected to the process plate 10. Next, the sprocket support plate fixing pad 4 to be welded is embedded in the clamping space between the clamping surface 32 of the bent plate 30 and the tank to be welded to achieve clamping and fixing. Alternatively, the sprocket support plate fixing pad 4 to be welded can be set on one side of the process plate 10 first, and then pressed down by the clamping surface 32 of the bent plate 30, and then the bent plate 30 and the process plate 10 are fixedly connected. Among them, the sprocket support plate fixing pad 4 needs to have its upper surface machined and holes drilled before welding.

[0027] In one embodiment, the inner diameter of the process plate 10 is larger than the outer diameter of the transmission end rolling pad 2 to facilitate assembly and disassembly.

[0028] In one embodiment, see Figure 2 The process plate 10 has equally spaced positioning holes 11 on its annular surface.

[0029] In one embodiment, the positioning hole includes a single-hole positioning hole (not shown) or a double-hole positioning hole (such as...). Figure 2 (as shown in the figure). Among them, the double-hole positioning hole is more stable after being fixed with the bending plate 30.

[0030] In one embodiment, see Figure 3 Unlike the previous embodiment, the process block 20 is a trapezoidal platform, with its first trapezoidal surface 21 being an arc surface that matches the annular inner diameter of the process plate (details not shown), and its second trapezoidal surface 22 having an inner surface that is flat, configured to axially limit the process plate.

[0031] In use, the process block 20 can be inserted from the front or back of the process plate 10, thereby achieving bidirectional positioning through adjacent process blocks 20, and facilitating the installation of bent plates 30 on both sides of the process plate 10, thereby achieving staggered fixing of the sprocket support plate fixing pad 4.

[0032] In one embodiment, the thickness of the first trapezoidal surface is slightly greater than the difference between the annular radius of the process plate and the radius of the cylinder to be welded.

[0033] In one embodiment, the side of the first trapezoidal surface is chamfered to facilitate insertion into the inner diameter of the process plate 10.

[0034] In one embodiment, see Figure 4 Both the fixing surface 31 and the clamping surface 32 of the bending plate 30 are provided with engagement holes 33, which are configured to be detachably fixedly connected to the process plate 10 and the sprocket support plate fixing pad 4 to be welded.

[0035] In one embodiment, the mating hole is either a pin hole or a threaded hole.

[0036] In one embodiment, each bent plate 30 has at least three engagement holes on its clamping surface 32, arranged in a triangular pattern. The triangular arrangement of the engagement holes helps to accurately position the sprocket support plate fixing pad. The top view of the sprocket support plate fixing pad is as follows: Figure 5 As shown, the sprocket support plate fixing pad plane is provided with engagement holes corresponding to the engagement holes on the clamping surface of the bent plate.

[0037] In one embodiment, the fixture for welding the fixing pad of the sprocket support plate of the extra-large irregular tank of this utility model further includes: a pin or bolt used to fit the mating hole.

[0038] In one embodiment, the fixture for welding the fixing pad of the sprocket support plate for an oversized irregularly shaped tank according to the present invention includes: multiple process blocks and multiple bent plates, the multiple bent plates having clamping surfaces of multiple lengths. The multiple clamping surfaces of multiple lengths are used to achieve staggered fixing of the sprocket support plate fixing pad in a single positioning installation.

[0039] Through the above examples, this utility model adopts a reference conversion method, which positions the process plate by designing process blocks, then positions the bending plate by the positioning holes of the process plate, and finally positions the sprocket support plate fixing pad by the engagement hole of the bending plate. This indirectly ensures the processing dimensions and positions of the plane of the sprocket support plate fixing pad and the engagement hole, avoiding the risks brought about by post-weld processing using a large boring machine. In addition, this utility model also has the characteristics of firm clamping and convenient alignment, which can greatly improve the assembly efficiency of the sprocket support plate fixing pad for ultra-large irregular tanks.

[0040] The complete process of machining the fixing pad for the sprocket support plate of a large irregularly shaped tank based on the fixture of this utility model includes:

[0041] Step 1: Weld a plug to the outer end face of the cylinder at both ends of the tank, and machine bearing holes for the plugs at both ends based on the center of the outer circle of the cylinder.

[0042] Step 2: Replace the lathe chuck and tailstock center with the inner ring of the bearing mounted on the top shaft, and the outer ring of the bearing mounted on the plug hole to ensure concentricity during the turning process;

[0043] Step 3: With the transmission end cylinder facing the tailstock, the tank body is supported by the chuck and the tailstock top shaft, and the tool holder is placed at the tailstock end.

[0044] Step 4: According to the sprocket installation position, spot weld a process block every 90° on the outer circle of the cylinder at the transmission end, and weld a total of 4 process blocks to form a cross.

[0045] Step 5: First, machine the outer circle of the tailstock end rolling pad;

[0046] Step 6: Machine the outer circle and side flange of the process block in one clamping operation;

[0047] Step 7: Turn the tank around, support it with a chuck and tailstock top shaft, and machine the outer circle of the passive end rolling ring pad.

[0048] Step 8: Remove the tank from the lathe, fit the inner diameter of the process plate onto the outer circle of the process block, and press the end face against the side of the second trapezoidal surface of the process block.

[0049] Step 9: Machin the mating plane and mating hole of the sprocket support plate fixing pad separately, leaving a thickness allowance for fitting;

[0050] Step 10: Join the bending plate with the process plate and measure the gap from the bottom of the bending plate to the cylinder.

[0051] Step 11: Repair the bottom surface of the sprocket support plate fixing pad according to the clearance;

[0052] Step 12: After the sprocket support plate fixing pad and the curved plate are clamped, they are positioned using the engagement hole;

[0053] Step 13: Weld the sprocket support plate fixing pad to the transmission cylinder;

[0054] Step 14: Remove the process plate and process block.

[0055] It should be noted that in this embodiment, four process blocks are first welded onto the transmission cylinder in a cross-shaped direction to achieve initial positioning of the process plate. Later, the radial position of the process plate can be fine-tuned by adding more process blocks. This method does not conflict with the method described in the previous embodiment, which involves first fitting the process plate and then using process blocks to position it; both methods have their advantages and disadvantages.

[0056] The above are exemplary embodiments disclosed in this utility model. However, it should be noted that various changes and modifications can be made without departing from the scope of the embodiments of this utility model as defined by the claims. The functions, steps, and / or actions of the methods according to the disclosed embodiments described herein do not need to be performed in any particular order. The embodiment numbers disclosed above are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0057] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Within the framework of the present invention, technical features of the above embodiments or different embodiments can also be combined, and many other variations of different aspects of the present invention exist, which are not provided in the details for the sake of brevity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fixture for welding a fixing pad for a sprocket support plate of an extra-large irregularly shaped tank, characterized in that, include: The process plate is an annular plate with an inner diameter larger than the diameter of the cylindrical body to be welded at both ends of the oversized irregular tank. It is configured to provide axial and circumferential positioning for the fixing pad of the sprocket support plate to be welded. A process block, comprising a pair of arc surfaces arranged opposite each other, configured to fit the annular inner diameter of the process plate to fix the process plate to the cylinder to be welded in a padding manner; A bending plate, detachably connected to the process plate, includes a fixed surface and a clamping surface perpendicular to the fixed surface. The fixed surface abuts against the annular surface of the process plate. The clamping surface is positioned closer to the cylinder to be welded than the fixed surface and has a clamping space between it and the cylinder to be welded. The clamping space is configured to place and clamp a sprocket support plate fixing pad to be welded.

2. The fixture for welding the fixing pad of the sprocket support plate for an oversized irregularly shaped tank as described in claim 1, characterized in that, The process plate has equally spaced positioning holes on its annular surface.

3. The fixture for welding the fixing pad of the sprocket support plate for an oversized irregularly shaped tank as described in claim 2, characterized in that, The positioning hole includes a single-hole positioning hole or a double-hole positioning hole.

4. The fixture for welding the fixing pad of the sprocket support plate for an oversized irregularly shaped tank as described in claim 1, characterized in that, The process block is a trapezoidal platform, with its first trapezoidal surface being an arc surface that matches the annular inner diameter of the process plate, and its second trapezoidal surface having an inner surface that is a plane, configured to axially limit the process plate.

5. The fixture for welding the fixing pad of the sprocket support plate for an oversized irregularly shaped tank according to claim 4, characterized in that, The thickness of the first trapezoidal surface is slightly greater than the difference between the annular radius of the process plate and the radius of the cylinder to be welded.

6. The fixture for welding the fixing pad of the sprocket support plate for an oversized irregularly shaped tank according to claim 1, characterized in that, Both the fixing surface and the clamping surface are provided with engagement holes, which are configured to be detachably connected to the process plate and the fixing pad of the sprocket support plate to be welded, respectively.

7. The fixture for welding the fixing pad of the sprocket support plate for an oversized irregularly shaped tank according to claim 6, characterized in that, The fitting hole is either a pin hole or a threaded hole.

8. The fixture for welding the fixing pad of the sprocket support plate for an oversized irregularly shaped tank according to claim 7, characterized in that, Each of the bent plates has at least three clamping holes on its clamping surface, arranged in a triangular pattern.

9. The fixture for welding the fixing pad of the sprocket support plate for an oversized irregularly shaped tank according to claim 8, characterized in that, Also includes: A pin or bolt used in conjunction with the aforementioned fitting hole.

10. The fixture for welding the fixing pad of the sprocket support plate for an extra-large irregularly shaped tank according to claim 9, characterized in that, include: Multiple process blocks and multiple bent plates, the multiple bent plates having clamping surfaces of multiple lengths.

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