Electric resistance welding drill bushing

Abstract

The utility model belongs to the technical field of aeronautical manufacturing, and relates to an electric resistance welding drill bushing. A drill bushing body is a cylinder, the upper end face and the lower end face of the drill bushing body are horizontal planes, a guide hole penetrates through the cylinder, a main shaft coaxial with the cylinder is arranged on the cylinder, annular teeth are arranged on the side close to the main shaft, and an annular groove is formed in the area between the main shaft and the annular teeth. The electric resistance welding drill bushing is simple in structure, easy to machine, low in cost and easy to use. The drill bushing and the sample plate are welded through electric resistance welding, the annular teeth are melted in the welding process to enable the drill bushing and the sample plate to be firmly connected, the annular groove is attached to the upper surface of the sample plate, the protruding length of the main shaft is consistent with the thickness of a sample plate material, the main shaft is flush with the lower surface of the sample plate after welding is completed, and the coaxiality of hole sites and the flatness of the sample plate are guaranteed. And the precision of drilling by using the sample plate is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of aviation manufacturing technology, and relates to a resistance welding drill sleeve. BACKGROUND

[0002] With the development and popularization of digital manufacturing technology, most machine parts have realized full-process digital processing and manufacturing, and the role of mold line sample has gradually weakened. However, the processing and manufacturing of sheet metal parts are still subject to the current technology and cannot realize full-process digital processing. Therefore, the mold line sample is mainly used as the processing and manufacturing basis and inspection basis of the sheet metal parts. Especially, the mold line sample plays an important role in drilling of the sheet metal parts. When drilling, the sample and the part are overlapped, and then a drill sleeve is embedded according to the hole position of the sample after reaming to drill a hole, so as to protect the hole position of the sample from deformation or wear caused by the drill bit during drilling, thereby ensuring the precision. Since the thickness of the sample is not more than 2 mm, the traditional drill sleeve is embedded on the sample to protrude a small boss, which cannot guarantee the flatness of the sample. In addition, the sample and the drill sleeve are connected by interference fit, and the drill sleeve is usually embedded by knocking during the embedding process. Since the knocking force is large and the direction of the force cannot be controlled to be perpendicular to the sample, the drill sleeve is easily deviated, which cannot guarantee the coaxiality, thereby affecting the processing precision of the part and further causing the part to be scrapped, which affects the quality of the aircraft product. During the knocking process, the sample bottom hole position is also easily damaged, which causes the sample to be repaired and remanufactured, thereby affecting the production cycle of the part. CONTENT OF THE UTILITY MODEL

[0003] OBJECT OF THE UTILITY MODEL

[0004] The resistance welding drill sleeve provided by the utility model overcomes the defects in the prior art, has simple structure, simple processing, low cost and simple use, the drill sleeve and the sample are welded by resistance welding, convenient installation, the connection between the sample and the drill sleeve is stable, the drill sleeve is not easy to fall off during use, manual hammering of the drill sleeve on the sample is avoided, the coaxiality of the hole position is guaranteed, the drill sleeve main shaft length is consistent with the sample thickness, no protrusion is generated, the flatness of the sample is guaranteed, and the drilling precision of the sample is improved.

[0005] TECHNICAL SCHEME

[0006] A resistance welding drill sleeve, the drill sleeve body is a cylinder, the upper and lower end faces are horizontal faces, a guide hole is arranged through the cylinder, a main shaft coaxial with the cylinder is arranged on the cylinder, an annular tooth is arranged on the side close to the main shaft, and an annular groove is formed between the main shaft and the annular tooth.

[0007] Further, the drill sleeve body is a cylinder, and the cylinder diameter is designed according to the drill bit diameter.

[0008] Further, the guide hole is a drill bit through hole, and the guide hole diameter is designed according to the drill bit diameter.

[0009] Further, the drill sleeve spindle is in interference fit with the template, and the outer diameter of the spindle is determined according to the hole diameter of the template drill sleeve through hole.

[0010] Further, the protruding length of the drill sleeve spindle is consistent with the thickness of the template material, and is flush with the lower surface of the template after welding.

[0011] Further, the drill sleeve annular tooth is a molten part during the welding process.

[0012] Further, considering the welding parameters and process, the annular tooth is provided with a tooth height of 1mm, an angle of 66°, and a width of 0.5mm.

[0013] Further, the drill sleeve annular groove is a horizontal surface with a width of 2mm, and is flush with the upper surface of the template after welding.

[0014] The beneficial effects of the present application are:

[0015] The utility model overcomes the deficiency in prior art drill sleeve, provides a resistance welding drill sleeve, and the resistance welding drill sleeve is simple in structure, simple in processing, low in cost and simple to use. The resistance welding is used to weld the drill sleeve and the template, the annular tooth is molten during the welding process, the drill sleeve and the template are connected firmly, the annular groove is flush with the upper surface of the template, the protruding length of the spindle is consistent with the thickness of the template material, and is flush with the lower surface of the template after welding. The design reinforces the connection stability between the template and the drill sleeve, prevents the drill sleeve from falling off during use, avoids the damage to the template caused by artificial hammering on the drill sleeve, guarantees the coaxiality of the hole position, guarantees the flatness of the template, and improves the precision of drilling using the template. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of resistance welding drill sleeve.

[0017] Figure 2 It is a schematic view of resistance welding drill sleeve and template welding.

[0018] Wherein: 1. drill sleeve body, 11. guide hole, 12. spindle, 13. annular tooth, 14. annular groove. 2. template schematic view, 3. resistance welding upper electrode schematic view, 4. resistance welding lower electrode schematic view. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be described in more detail below with reference to the embodiments of this utility model. In the examples, the same or similar reference numerals denote the same or similar components or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this utility model. The embodiments described below with reference to the embodiments are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. The embodiments of this utility model will be described in detail below with reference to their specific implementation.

[0020] A resistance welding drill bushing has a cylindrical body with horizontal upper and lower end faces. A guide hole 11 is provided through the cylinder. A main shaft 12 coaxial with the cylinder is provided on the cylinder. An annular tooth 13 is provided on the side near the main shaft 12. An annular groove 14 is formed in the area between the main shaft 12 and the annular tooth 13.

[0021] The aforementioned welding drill bushing has a main body 1 that is cylindrical, with the diameter of the cylinder designed according to the diameter of the drill bit. The upper surface of the main body is a horizontal surface that contacts the resistance welding electrode.

[0022] The welded drill bushing has a guide hole 11, which is a drill bit through hole. The diameter of the guide hole can be designed according to the diameter of the drill bit. The guide hole is coaxial with the main body of the drill bushing and perpendicular to the upper and lower end faces.

[0023] The welding drill bushing has a spindle 12 that is interference-fitted with the template. The outer diameter of the spindle is determined according to the diameter of the drill bushing through hole in the template. The protruding length is consistent with the thickness of the template material. After welding, it is flush with the lower surface of the template.

[0024] The aforementioned welding drill bushing, wherein the annular teeth 13 of the drill bushing are the molten portion during the electric welding process.

[0025] Considering welding parameters and processes, the annular tooth 13 is set with a tooth height of 1mm, an angle of 66°, a horizontal lower end face, and a width of 0.5mm.

[0026] The aforementioned welding drill bushing has an annular groove 14 that is horizontal and 2mm wide, and after welding, it fits against the upper surface of the template.

[0027] like Figure 1 As shown, a resistance welding drill bushing is provided. The main body of the drill bushing is cylindrical, with both the upper and lower end faces being horizontal. The main body is provided with a coaxial guide hole 11, a spindle 12, an annular tooth 13, and an annular groove 14. During welding... Figure 2The shown mounting drill sleeve is connected with the sample plate through resistance welding of the drill sleeve and the sample plate to melt the annular teeth to make the drill sleeve and the sample plate firmly connected, the annular groove is attached to the upper surface of the sample plate, and the protruding part of the main shaft is flush with the lower surface of the sample plate.

[0028] In addition, unless otherwise defined, technical terms or scientific terms used in the description of the present application shall be the general meaning understood by the person skilled in the art in the field to which the present application belongs. The words indicating orientation such as "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inner", "outer" and the like used in the description of the present application are only used to indicate relative direction or positional relationship, not to imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and the relative positional relationship may also change accordingly when the absolute position of the described object changes, therefore it cannot be understood as a limitation on the present application. The terms "first", "second", "third" and the like used in the description of the present application are only for descriptive purposes to distinguish different components, and cannot be understood as indicating or implying relative importance. The terms "one", "an" or "the" and the like used in the description of the present application should not be understood as an absolute limitation on the quantity, but should be understood as the presence of at least one. The terms "include" or "contain" and the like used in the description of the present application mean that the elements or objects appearing before the word are encompassed by the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0029] In addition, it should be further pointed out that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" and the like used in the description of the present application should be interpreted broadly, for example, the connection can be fixed connection, or detachable connection, or integral connection; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, or the connection between two elements, those skilled in the art can understand the specific meaning of the terms in the present application according to the specific circumstances.

[0030] The above is only a specific implementation of the present application and is not used to limit the present application, any skilled person in the art can make changes or modifications to the equivalent embodiments within the spirit and principles of the present application, and apply them to other fields, but any simple modification, equivalent change and improvement made to the above embodiments according to the technical essence of the present application shall be included in the protection scope of the present application.

Claims

1. A resistance welded drill collar characterized by, The drill sleeve body is a cylinder, the upper and lower end faces are horizontal planes, a guide hole is arranged through the cylinder, a main shaft coaxial with the cylinder is arranged on the cylinder, an annular tooth is arranged on the side close to the main shaft, and an annular groove is formed between the main shaft and the annular tooth.

2. The drill bushing of claim 1, wherein, The drill sleeve body is a cylinder, and the diameter of the cylinder is designed according to the diameter of the drill bit.

3. The drill bushing of claim 1, wherein, The guide hole is a drill bit passing hole, and the diameter of the guide hole is designed according to the diameter of the drill bit.

4. The drill bushing of claim 1 wherein, The drill sleeve main shaft is in interference fit with the sample plate, and the outer diameter of the main shaft is determined according to the diameter of the sample plate drill sleeve passing hole.

5. The drill bushing of claim 1 wherein, The protruding length of the drill sleeve main shaft is consistent with the thickness of the sample plate material, and is flush with the lower surface of the sample plate after welding.

6. The drill bushing of claim 1 wherein, The drill sleeve annular tooth is a molten part in the electric welding process.

7. The drill bushing of claim 1 wherein, Considering the welding parameters and process, the annular tooth is provided with a tooth height of 1 mm, an angle of 66°, and a width of 0.5 mm.

8. The drill bushing of claim 1 wherein, The drill sleeve annular groove is a horizontal plane, and the width is 2 mm, and is attached to the upper surface of the sample plate after welding.

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