An additive build-up welding structure of a workpiece with holes

Abstract

The utility model discloses an additive surfacing structure of workpiece with hole, including workpiece with hole, washer, plunger and pad shoulder, and the surfacing face of workpiece with hole is provided with process hole, and the plunger is set as the columnar piece of linear extension, and the washer is set as the tubular piece, and the washer is sleeved on the plunger, and the washer and plunger are all arranged in the process hole, and the washer is arranged between the plunger and the hole wall of process hole, and the pad shoulder is fixedly arranged at one end of the plunger, and the pad shoulder is positioned and connected with the surface of workpiece with hole, the utility model positions and blocks the washer and plunger in the process hole through the pad shoulder, guarantees the continuous surfacing of surfacing face, avoids the method of direct interruption surfacing of hole treatment in the prior art, reduces the influence of process hole setting on surfacing efficiency, and meanwhile, the washer and plunger can effectively position the original process hole position, guaranteeing the accurate positioning machining of process hole subsequently.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, specifically to an additive welding structure for a workpiece with holes. Background Technology

[0002] When performing surface welding on equipment, if there are holes on the surface to be welded, the welding material will fill the holes if no special treatment is done. This will cause the holes to be re-machined after the welding is completed. In this case, the hole position is difficult to locate, which can easily cause the position of the newly drilled hole to deviate from the original hole, resulting in the workpiece being unable to be assembled normally after welding.

[0003] When encountering workpieces with holes, in order to ensure the accurate position of the holes, the threaded hole welding pre-reservation method is generally used. That is, during welding, the arc is stopped when the welding reaches the edge of the hole. In order to ensure the thickness of the weld at the hole, one or more additional weld passes are required at the edge of the hole. Although this method can accurately determine the original hole position for subsequent processing, if there are multiple holes, the welding efficiency will be severely reduced due to frequent welding interruptions. At the same time, the subsequent additional welding will also cause irregularities around the hole, which will also make it difficult to position the hole during processing.

[0004] In view of the above-mentioned defects, the creator of this utility model has finally obtained this utility model after a long period of research and practice. Summary of the Invention

[0005] To address the aforementioned technical deficiencies, the present invention provides an additive welding structure for a workpiece with holes, comprising a workpiece with holes, a washer, a plunger, and a shoulder. A process hole is provided on the weld overlay surface of the workpiece with holes. The plunger is configured as a columnar member extending in a straight line. The washer is configured as a cylindrical member and is sleeved on the plunger. Both the washer and the plunger are disposed within the process hole, with the washer positioned between the plunger and the hole wall of the process hole. The shoulder is fixedly disposed at one end of the plunger and is engaged and positioned with the surface of the workpiece with holes.

[0006] Preferably, the cross-sectional shape of the plunger is set to a circle or polygon corresponding to the cross-sectional shape of the process hole, and the inner and outer cross-sectional shapes of the gasket are respectively set to correspond to the cross-sectional shape of the plunger and the cross-sectional shape of the process hole.

[0007] Preferably, the gasket is made of a material that does not fuse with the welding material.

[0008] Preferably, the shoulder pad is configured as a pedestal structure, and the top cross-section of the shoulder pad is smaller than the bottom cross-section of the shoulder pad.

[0009] Preferably, the shoulder pad is provided with a placement groove extending coaxially from the bottom to the top, and the end of the plunger is coaxially fixed to the bottom of the placement groove.

[0010] Preferably, the placement groove includes a connecting section and a chamfered section arranged coaxially in sequence. The connecting section is fixedly connected to the end of the plunger. The chamfered section is located on the bottom side near the shoulder. An equidistant placement gap is provided between the outer wall of the plunger and the groove wall of the connecting section. The width of the placement gap corresponds to the wall thickness of the washer. The end of the washer is located within the placement gap.

[0011] Preferably, the distance between the chamfered groove wall and the outer wall of the washer gradually increases from the top of the shoulder to the bottom of the shoulder.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model uses the shoulder to position and block the washer and the plunger in the process hole, ensuring continuous welding of the weld overlay surface. This avoids the direct interruption of welding during hole processing in the prior art, reducing the impact of process hole setting on welding efficiency. At the same time, the washer and the plunger can effectively position the original process hole, ensuring accurate positioning and processing of the process hole in the subsequent process hole. It can also effectively protect the threads in the process hole from damage by electric arc and spatter during welding. Attached Figure Description

[0013] Figure 1 A three-dimensional structural view of the washer, the plunger, and the shoulder; Figure 2 A view showing the connection structure between the plunger and the shoulder; Figure 3 This is a schematic diagram of the connection structure of the additive overlay welding structure of the perforated workpiece before overlay welding; Figure 4 This is a cross-sectional view of the connection structure of the additive overlay structure of the perforated workpiece before overlay welding; Figure 5 This is a schematic diagram of the connection structure of the additive welding structure of the perforated workpiece after machining; Figure 6 This is a cross-sectional view of the connection structure of the additive welding structure of the workpiece with holes after machining.

[0014] The numbers in the image represent: 1-Workpiece with hole; 2-Washer; 3-Plug; 4-Shoulder; 5-Process hole; 6-Weld overlay; 7-Placement groove; 71-Connecting section; 72-Chamfered section; 73-Placement gap. Detailed Implementation

[0015] The above-mentioned and other technical features and advantages of this utility model will be described in more detail below with reference to the accompanying drawings. Example 1

[0016] like Figure 1 and Figure 2 As shown, Figure 1 A three-dimensional structural view of the washer, the plunger, and the shoulder; Figure 2 This is a view of the connection structure between the plunger and the shoulder pad.

[0017] The additive welding structure for a perforated workpiece of this utility model includes a perforated workpiece 1, a washer 2, a plunger 3, and a shoulder 4. A process hole 5 is provided on the welding surface of the perforated workpiece 1. The plunger 3 is configured as a columnar member extending in a straight line. The washer 2 is configured as a cylindrical member and is sleeved on the plunger 3. Both the washer 2 and the plunger 3 are disposed within the process hole 5, and the washer 2 is disposed between the plunger 3 and the hole wall of the process hole 5. The shoulder 4 is fixedly disposed at one end of the plunger 3 and is engaged with the surface of the perforated workpiece 1 to fix the position of the plunger 3 within the process hole 5.

[0018] The cross-sectional shape of the plunger 3 is set to be a circle or a polygon corresponding to the cross-sectional shape of the process hole 5. Correspondingly, the inner and outer cross-sectional shapes of the washer 2 are set to correspond to the cross-sectional shapes of the plunger 3 and the process hole 5, respectively, to ensure that the washer 2 and the plunger 3 are effectively inserted into the process hole 5.

[0019] Generally, the washer 2 is made of a material that does not fuse with the welding material, such as copper, the plunger 3 is made of steel, and the shoulder 4 and the plunger 3 are integrally formed.

[0020] The plunger 3 is inserted into the process hole 5 and fixed by the shoulder 4. During welding, continuous welding can be performed on the welding surface. After welding is completed, the welding surface needs to be machined to remove excess molten metal to the required thickness. At this time, part of the shoulder 4 is machined away, exposing the washer 2 and the plunger 3, which allows for quick positioning of the process hole 5 and facilitates subsequent machining restoration of the process hole 5. The plunger 3 can be drilled out with a drill bit, and the washer 2 can be removed to restore the process hole 5. Alternatively, the washer 2 and the plunger 3 can be drilled out as a whole and the process hole 5 can be remachined. Because copper is relatively soft, when the process hole 5 is a threaded hole, the washer 2 and the plunger 3 can be punched out as a whole without damaging the threads to restore the threaded hole.

[0021] Specifically, the shoulder pad 4 is configured as a column structure, and the top cross-section of the shoulder pad 4 is smaller than the bottom cross-section of the shoulder pad 4, so that the bottom of the shoulder pad 4 can be engaged and positioned with the perforated workpiece 1.

[0022] Preferably, the shoulder pad 4 is provided with a placement groove 7 extending coaxially from the bottom to the top, and the end of the plunger 3 is coaxially fixed to the bottom of the placement groove 7. This ensures that when the shoulder pad 4 and the perforated workpiece 1 are engaged and positioned, the end of the plunger 3 is higher than the opening of the process hole 5. At the same time, the material thickness of the shoulder pad 4 is reduced, so that after welding, the machining of the weld overlay layer 6 makes it easier to expose the cross section of the plunger 3 to determine the position of the process hole 5.

[0023] Generally, the placement groove 7 includes a connecting section 71 and a chamfered section 72 arranged coaxially in sequence. The connecting section 71 is fixedly connected to the end of the plunger 3. The chamfered section 72 is located on the bottom side near the shoulder 4. An equidistant placement gap 73 is provided between the outer wall of the plunger 3 and the groove wall of the connecting section 71. The width of the placement gap 73 corresponds to the wall thickness of the washer 2. The end of the washer 2 is located within the placement gap 73, thereby defining the relative position between the washer 2 and the plunger 3. At the same time, it ensures that the top of the copper washer 2 is designed above the surface of the solder overlay layer 6, ensuring that after soldering, the top of the washer 2 is above the machined surface, ensuring that the washer 2 can be clearly exposed after machining.

[0024] The chamfered section 72 is provided with a chamfer. Specifically, the distance between the groove wall of the chamfered section 72 and the outer wall of the washer 2 gradually increases from the top of the shoulder 4 to the bottom of the shoulder 4, so as to facilitate the fitting of the washer 2 into the placement gap 73. At the same time, the design thickness of the shoulder 4 is controlled to ensure that the shoulder 4 melts and melts into the weld overlay layer 6 under the action of the heat source during additive welding. This will prevent welding defects such as missing material at the edge of the process hole 5, insufficient thickness of the weld overlay layer 6, incomplete fusion, and incomplete penetration.

[0025] This invention uses the shoulder 4 to position and block the washer 2 and the plunger 3 within the process hole 5, ensuring continuous welding of the weld overlay surface. This avoids the direct interruption of welding during hole processing in the prior art, reducing the impact of the process hole 5 setting on welding efficiency. At the same time, the washer 2 and the plunger 3 can effectively position the original process hole 5, ensuring accurate positioning and processing of the process hole 5 in the future. Example 2

[0026] like Figures 3 to 6 As shown, Figure 3 This is a schematic diagram of the connection structure of the additive overlay welding structure of the perforated workpiece before overlay welding; Figure 4 This is a cross-sectional view of the connection structure of the additive overlay structure of the perforated workpiece before overlay welding; Figure 5 This is a schematic diagram of the connection structure of the additive welding structure of the perforated workpiece after machining; Figure 6 This is a cross-sectional view of the connection structure of the additive welding structure of the workpiece with holes after machining.

[0027] The specific welding process of the additive welding structure of the perforated workpiece 1 described in this utility model is as follows: First, clean the oil stains inside the process hole 5, then insert the plunger 3 into the process hole 5, and the shoulder 4 fits tightly against the surface of the workpiece 1 with the hole. Then, perform a welding operation on the weld overlay surface. After the welding is completed, machine the weld overlay layer 6 formed by the welding to the design size, exposing the cross-sections of the washer 2 and the plunger 3. Remove the washer 2 and the plunger 3 and perform hole machining on the process hole 5.

[0028] The removal of the washer 2 and the plunger 3 can be achieved by drilling the plunger 3 to remove the washer 2, or by directly punching the washer 2 and the plunger 3 out as a whole by impact, or by directly machining the washer 2 and the plunger 3 to process the process hole 5.

[0029] It is worth noting that this utility model is a protective measure and processing technology for existing threaded holes and similar threaded holes, process holes 5, or concave structures that are lower than the weld overlay surface and need to be retained when welding is required on the equipment.

[0030] The above description is merely a preferred embodiment of the present utility model and is illustrative rather than restrictive. Those skilled in the art will understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present utility model, all of which will fall within the protection scope of the present utility model.

Claims

1. An additive welding structure for a workpiece with holes, characterized in that, The device includes a perforated workpiece, a washer, a plunger, and a shoulder. The perforated workpiece has a process hole on its weld overlay surface. The plunger is a cylindrical member extending in a straight line. The washer is a cylindrical member and is sleeved on the plunger. Both the washer and the plunger are located inside the process hole, and the washer is located between the plunger and the hole wall of the process hole. The shoulder is fixedly located at one end of the plunger and is engaged and positioned with the surface of the perforated workpiece.

2. The additive welding structure for a workpiece with holes as described in claim 1, characterized in that, The cross-sectional shape of the plunger is set to be a circle or a polygon corresponding to the cross-sectional shape of the process hole, and the inner and outer cross-sectional shapes of the gasket are respectively set to correspond to the cross-sectional shape of the plunger and the cross-sectional shape of the process hole.

3. The additive welding structure for a workpiece with holes as described in claim 1, characterized in that, The gasket is made of a material that does not fuse with the welding material.

4. The additive welding structure for a workpiece with holes as described in claim 3, characterized in that, The shoulder pad is configured as a pedestal structure, and the top cross-section of the shoulder pad is smaller than the bottom cross-section of the shoulder pad.

5. The additive welding structure for a workpiece with holes as described in claim 4, characterized in that, The shoulder pad extends coaxially from the bottom to the top and is provided with a placement groove, and the end of the plunger is coaxially fixed to the bottom of the placement groove.

6. The additive welding structure for a workpiece with holes as described in claim 5, characterized in that, The placement groove includes a connecting section and a chamfered section arranged coaxially in sequence. The connecting section is fixedly connected to the end of the plunger. The chamfered section is located on the bottom side near the shoulder. An equidistant placement gap is provided between the outer wall of the plunger and the groove wall of the connecting section. The width of the placement gap corresponds to the wall thickness of the washer. The end of the washer is located within the placement gap.

7. The additive welding structure for a workpiece with holes as described in claim 6, characterized in that, The distance between the chamfered groove wall and the outer wall of the washer gradually increases from the top of the shoulder to the bottom of the shoulder.

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