Annular tube body of microphone and processing technology of annular tube body

Abstract

The invention discloses an annular tube body of a microphone, and aims to solve the problems that the existing traditional annular tube body needs to customize a circular tube body with a proper size and then is subjected to machining one by one, so that the process is long in customization time, complex in processing procedure and long in processing time consumption, so that the productivity is insufficient and the cost is too high. The microphone annular pipe body is obtained by integrally winding and forming a blank and then welding, the microphone annular pipe body comprises a metal cylinder with two open ends, long holes are formed in the front side and the rear side of the metal cylinder, and two connecting ribs are formed between the front long hole and the rear long hole. And after welding, heat treatment is used for removing stress of the standard metal cylinder, the temperature difference between a welding area and a non-welding area is reduced, the residual stress of materials is reduced, cracks are avoided, the machined microphone annular pipe body is not prone to being broken, and the quality is obviously improved.

Description

Technical Field

[0001] The invention belongs to the technical field of annular tube processing, and in particular relates to an annular tube of a microphone and a processing technology of the annular tube. Background Art

[0002] With the popularity of Karaoke, Karaoke equipment has gradually changed from the original professional type to a convenient, miniaturized, and home-based type. A large number of outdoor Karaoke speakers, Karaoke treasures, home theaters, car wireless microphones, etc. have emerged on the market. The shapes of microphones have also become colorful. Users are no longer satisfied with traditional round iron mesh microphones, so designers have made many shapes on the microphones. Among them, the ring tube design is the most common and the processing is the most complicated.

[0003] like Figure 1 As shown, the traditional processing technology of the annular tube body 112 is generally to customize a circular tube body 111 of appropriate size, and use laser, CNC, and punching machine to machine the tube body 111 surface by surface, and process the holes and grooves on the surface of the tube body 111 to form the annular tube body 112. This process takes a long time to customize, the processing procedures are complicated, and the processing is time-consuming, resulting in insufficient production capacity and excessively high costs. Summary of the invention

[0004] (1) Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a microphone annular tube body and a processing technology for the annular tube body. The microphone annular tube body is intended to solve the problem that the existing traditional annular tube body needs to be customized into a circular tube body of appropriate size and then machined one surface at a time. This process has a long customization time, complex processing procedures, and a long processing time, resulting in insufficient production capacity and excessively high costs.

[0006] (2) Technical solution

[0007] In order to solve the above technical problems, the present invention provides a microphone annular tube body, which is obtained by integrally winding a blank and then welding it. The microphone annular tube body includes a metal cylinder with openings at both ends, and long holes are provided on the front and rear sides of the metal cylinder. Two connecting ribs are formed between the two long holes, and a groove is provided in the middle part of the outer side of the connecting rib. A plurality of through holes are provided on the inner wall of the groove, and the other end of the through hole penetrates the inner wall of the metal cylinder, and a threaded groove is provided on the inner wall of the top end of the metal cylinder.

[0008] Preferably, the number of the through holes is five, and the five through hole arrays are distributed inside the groove.

[0009] A processing technology for a microphone annular tube body comprises the following steps:

[0010] Step 1: Cut the iron sheet material, and use a mold to punch out a long hole in the middle, half holes and through holes on both sides. At this time, connecting ribs are formed between the half holes and the long holes on both sides, and the upper and lower ends of the half holes form upper connecting plates and lower connecting plates respectively;

[0011] Step 2: Use machining equipment to process slots and form grooves at the through holes of the connecting ribs, and then obtain a blank;

[0012] Step 3, fix the blank on the fixture, and keep the upper connecting plate on the left side adjacent to the upper connecting plate on the right side to form a first seam, and the lower connecting plate on the left side adjacent to the lower connecting plate on the right side to form a second seam, wherein a notch for welding is provided on the fixture, and the first seam and the second seam are located within the range of the notch, and then spot welding is performed along the first seam and the second seam to weld the blank into a metal cylinder;

[0013] Step 4: Use a grinding device to grind the welding points at the first joint and the second joint to make them smooth, and then use a grinding tool to shape them into a standard metal cylinder;

[0014] Step 5: Fix the lower connecting plate of the standard metal cylinder by a clamp, then the main motion of the machine tool rotates the milling cutter, and the screw drives the standard metal cylinder to perform feed motion, so that the inner wall of the upper connecting plate of the standard metal cylinder is processed with an internal thread structure to form a thread groove;

[0015] Step 6: Polish and trim the metal cylinder after processing the thread groove to improve the surface quality and appearance, and then spray the surface after pickling to increase corrosion resistance and aesthetics.

[0016] Furthermore, a drawing of the microphone annular tube body is drawn before cutting the iron sheet material, and then the size requirements of each part are determined, and then the microphone annular tube body is unfolded and the cutting size is calculated.

[0017] Furthermore, the size of the blank should be determined in terms of length, width and thickness based on the diameter, height, wall thickness of the microphone annular tube body and the elongation of the iron sheet material after shaping.

[0018] Furthermore, the blank is laser deburred and cleaned before being fixed in the fixture for welding, so as to remove oil stains and burrs on the upper connecting plate and the lower connecting plate.

[0019] Furthermore, before step three, the inner side of the upper connecting plate of the blank is chamfered using a chamfering machine, and the depth of the chamfer is greater than the distance between the thread groove and the outer side surface of the annular tube body of the plate microphone.

[0020] Furthermore, after the spot welding positioning in step three, observe whether the first seam and the second seam are qualified. If qualified, the outer sides of the first seam and the second seam are fixed by high-frequency laser full welding, and the welding depth is less than the distance between the thread groove and the outer side of the annular tube body of the plate microphone.

[0021] Furthermore, during welding, a protective gas is provided to the welding points of the first joint and the second joint through a blowing device, the flow rate of the protective gas is less than 30L / min, and the protective gas is one of argon, helium, nitrogen and carbon dioxide.

[0022] Furthermore, after the internal thread structure is machined in step five, heat treatment is used to remove stress from the standard metal cylinder.

[0023] (3) Beneficial effects

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] In the above scheme, by chamfering the inner side of the upper connecting plate of the blank, the welding form is surface welding, the molten pool of laser welding cools quickly, and the welding depth is less than the distance between the thread groove and the outer side surface of the microphone annular tube body of the plate. The chamfer set in this way is equivalent to the existence of a back-off groove in the process of processing the thread groove, which is not only convenient for material discharge, but also does not require processing of the welding point, thereby increasing the use time of the tool. At the same time, heat treatment is used to remove stress from the standard metal cylinder after welding, which can reduce the temperature difference between the welding area and the non-welding area, reduce the residual stress of the material, avoid the generation of cracks, and make the processed microphone annular tube body not easy to break, and the quality is significantly improved.

[0026] In the above scheme, the process is simplified on the basis of traditional technology. The principle of plane unfolding is used to unfold the round tube into a plane. The original processing process on the arc surface is changed to processing on the unfolded plane, which makes the process simpler and can be stamped and formed in one time, thus reducing the processing time. Then, the plane is bent into an arc by the bending principle, and spot welding is used to connect it and a mold is used to shape it into a regular round tube. This process not only simplifies the process, reduces the processing complexity and processing time, but also reduces the production cost and improves the production capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the existing microphone annular tube body processing technology;

[0028] Figure 2 A schematic diagram of the structure of cutting and punching holes in the processing technology of the annular tube of the microphone of the present invention;

[0029] Figure 3 A schematic diagram of the structure of a microphone annular tube body and a machining groove of the processing technology of the annular tube body;

[0030] Figure 4 A schematic diagram of the structure of a microphone annular tube body and a processing technology of the annular tube body, wherein the annular tube body is bent into a circular ring and spot-welded;

[0031] Figure 5 A schematic diagram of the structure of a microphone annular tube body and a processing technology of the annular tube body for polishing the welding points;

[0032] Figure 6 A schematic diagram of the structure of a microphone annular tube body and a processing technology for processing the annular tube body to produce an internal thread;

[0033] Figure 7 A schematic diagram of the three-dimensional structure of a microphone annular tube body and a processing technology of the annular tube body with chamfered corners;

[0034] Figure 8 A microphone annular tube body and a processing technology thereof Figure 7 Schematic diagram of the enlarged structure at point A in the middle.

[0035] The markings in the attached drawings are: 1. iron sheet material; 2. metal cylinder; 3. long hole; 4. connecting rib; 5. groove; 6. through hole; 7. threaded groove; 8. half hole; 9. upper connecting plate; 10. lower connecting plate; 11. blank; 12. first seam; 13. second seam; 14. chamfer. DETAILED DESCRIPTION

[0036] This specific embodiment is a microphone annular tube body, and its structural schematic diagram is as follows Figure 1-Figure 8 As shown, the microphone annular tube body is obtained by integrally winding a blank 11 and then welding it, and the microphone annular tube body includes a metal cylinder 2 with openings at both ends, long holes 3 are provided on the front and rear sides of the metal cylinder 2, and two connecting ribs 4 are formed between the two long holes 3. A groove 5 is provided in the middle of the outer side of the connecting rib 4, and a plurality of through holes 6 are provided on the inner wall of the groove 5. The other end of the through hole 6 passes through the inner wall of the metal cylinder 2, and a threaded groove 7 is provided on the inner wall of the top end of the metal cylinder 2.

[0037] like Figure 6 As shown, in this embodiment, the number of through holes 6 is five, and the five through holes 6 are arranged in an array inside the groove 5 .

[0038] The present invention also provides a processing technology for a microphone annular tube body, comprising the following steps:

[0039] Step 1, cutting the iron sheet material 1, using a die to punch out the long hole 3 in the middle, the half holes 8 and the through holes 6 on both sides, at this time, connecting ribs 4 are formed between the half holes 8 and the long holes 3 on both sides, and the upper and lower ends of the half holes 8 form an upper connecting plate 9 and a lower connecting plate 10 respectively;

[0040] Step 2: Use machining equipment to process a groove at the through hole 6 of the connecting rib 4 and form a groove 5, and then obtain a blank 11;

[0041] Step 3, fix the blank 11 on the fixture, and keep the upper connecting plate 9 on the left side adjacent to the upper connecting plate 9 on the right side to form a first joint 12, and the lower connecting plate 10 on the left side adjacent to the lower connecting plate 10 on the right side to form a second joint 13, wherein the fixture is provided with a notch for welding, and the first joint 12 and the second joint 13 are located within the notch range, and then spot welding is performed along the first joint 12 and the second joint 13 to weld the blank 11 into a metal cylinder 2;

[0042] Step 4: Use a grinding device to grind the welding points at the first joint 12 and the second joint 13 to make them smooth, and then use a grinding tool to shape them into a standard metal cylinder 2;

[0043] Step 5: Fix the lower connecting plate 10 of the standard metal cylinder 2 by a clamp, then the main motion of the machine tool rotates the milling cutter, and the screw drives the standard metal cylinder 2 to perform a feed motion, so that the inner wall of the upper connecting plate 9 of the standard metal cylinder 2 is processed with an internal thread structure to form a thread groove 7;

[0044] Step 6: Polish and trim the metal cylinder 2 after processing the thread groove 7 to improve the surface quality and appearance, and then spray the surface after pickling to increase corrosion resistance and aesthetics.

[0045] Through iron plate cutting, hole and groove processing, circular bending, spot welding, grinding, shaping, machine thread and surface treatment technology, after the iron sheet is cut, it is machined on its surface, the hole and groove positions on the original arc are processed on the plane, and then the plane is bent into a circular ring by circular bending, and then the interface is spot welded and connected, the raised part of the surface welding point is ground off, and the mold is used to shape it into a standard circular ring, and then the internal processing is carried out to process the internal steps and threaded parts, and then the surface is pickled and sprayed. Compared with the previous traditional process, this new processing technology does not require customized steel pipes, reduces processing difficulty, improves production efficiency, reduces production costs, and is suitable for many circular pipe body processing.

[0046] In this embodiment, a drawing of the microphone annular tube body is drawn before cutting the iron sheet material 1, and then the size requirements of each part are determined, and then the microphone annular tube body is unfolded and the size of the cutting material is calculated.

[0047] In this embodiment, the length, width and thickness of the blanking material should be determined based on the diameter, height, wall thickness of the microphone annular tube body and the elongation of the iron sheet material 1 after shaping. In this way, due to the different elongation of the iron sheet material 1, the length of the blanking material should be appropriately reduced, and the length will increase when shaping the metal cylinder 2 in step four, thereby forming a standard metal cylinder 2 during shaping.

[0048] In this embodiment, the blank 11 is laser deburred and cleaned before being fixed in the fixture for welding to remove oil stains and burrs on the upper connecting plate 9 and the lower connecting plate 10. This can improve the welding strength between the upper connecting plates 9 on both sides and the lower connecting plates 10 on both sides and avoid oil stains affecting the welding quality.

[0049] like Figure 7 and Figure 8 As shown, in this embodiment, before step three, the inner side of the upper connecting plate 9 of the blank 11 is chamfered 14 using a chamfering machine, and the depth of the chamfer 14 is greater than the distance between the thread groove 7 and the outer side of the annular tube body of the plate microphone. After the spot welding positioning in step three, observe whether the first seam 12 and the second seam 13 are qualified. If qualified, the outer sides of the first seam 12 and the second seam 13 are fixed by high-frequency laser full welding, and the welding depth is less than the distance between the thread groove 7 and the outer side of the annular tube body of the plate microphone.

[0050] In this arrangement, chamfer 14 is performed on the inner side of the upper connecting plate 9 of the blank 11. The welding form is surface welding. The molten pool of laser welding cools quickly. The welding depth is less than the distance between the thread groove 7 and the outer side surface of the annular tube body of the plate microphone. The chamfer 14 set in this way is equivalent to the existence of a tool retreat groove in the process of processing the thread groove 7, which is not only convenient for material discharge, but also does not require processing of the welding point, thereby increasing the use time of the tool.

[0051] In this embodiment, a protective gas is provided to the welding points of the first seam 12 and the second seam 13 through a blowing device during welding. The flow rate of the protective gas is less than 30 L / min. The protective gas is one of argon, helium, nitrogen and carbon dioxide. After the internal thread structure is processed in step five, heat treatment is used to remove stress from the standard metal cylinder 2.

[0052] Using heat treatment to remove stress from the standard metal cylinder 2 after welding can reduce the temperature difference between the welding area and the non-welding area, reduce the residual stress of the material, avoid the generation of cracks, make the processed microphone ring tube body less likely to break, and significantly improve the quality.

[0053] All technical features in this embodiment can be freely combined according to actual needs.

[0054] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A microphone annular tube body, characterized in that: The microphone annular tube body is obtained by integrally winding a blank (11) and then welding it. The microphone annular tube body comprises a metal cylinder (2) with openings at both ends. Long holes (3) are provided on the front and rear sides of the metal cylinder (2). Two connecting ribs (4) are formed between the front and rear long holes (3). A groove (5) is provided in the middle of the outer side of the connecting rib (4). A plurality of through holes (6) are provided on the inner wall of the groove (5). The other end of the through hole (6) passes through the inner wall of the metal cylinder (2). A threaded groove (7) is provided on the inner wall of the top end of the metal cylinder (2).

2. The microphone annular tube body according to claim 1, characterized in that: The number of the through holes (6) is five, and the five through holes (6) are arranged in an array and distributed inside the groove (5).

3. A processing technology for a microphone annular tube body, characterized in that: The microphone annular tube body according to any one of claims 1 to 2 further comprises the following steps: Step 1: Cut the iron sheet material (1) and use a mold to punch out a long hole (3) in the middle, half holes (8) on both sides and a through hole (6) during cutting. At this time, connecting ribs (4) are formed between the half holes (8) on both sides and the long holes (3), and upper and lower ends of the half holes (8) respectively form an upper connecting plate (9) and a lower connecting plate (10); Step 2: Use machining equipment to process a groove at the through hole (6) of the connecting rib (4) and form a groove (5), thereby obtaining a blank (11); Step 3, fix the blank (11) on the fixture, and keep the upper connecting plate (9) on the left side adjacent to the upper connecting plate (9) on the right side to form a first joint (12), and the lower connecting plate (10) on the left side adjacent to the lower connecting plate (10) on the right side to form a second joint (13), wherein the fixture is provided with a notch for welding, and the first joint (12) and the second joint (13) are located within the notch range, and then spot welding is performed along the first joint (12) and the second joint (13) to weld the blank (11) into a metal cylinder (2); Step 4: grinding the welding points at the first joint (12) and the second joint (13) to make them smooth by using a grinding device, and then using a grinding tool to shape them into a standard metal cylinder (2); Step 5: Fix the lower connecting plate (10) of the standard metal cylinder (2) by a clamp, then rotate the milling cutter by the main motion of the machine tool, and the screw rod drives the standard metal cylinder (2) to perform a feeding motion, so that the inner wall of the upper connecting plate (9) of the standard metal cylinder (2) is processed to form an internal thread structure, thereby forming a thread groove (7); Step 6: Polish and trim the metal cylinder (2) after processing the thread groove (7) to improve the surface quality and appearance, and then pickle and spray the surface to increase corrosion resistance and aesthetics.

4. The processing technology of the microphone annular tube body according to claim 3, characterized in that: Before cutting the iron sheet material (1), a drawing of the microphone annular tube body is drawn, and then the size requirements of each part are determined. Then, the microphone annular tube body is unfolded and the size of the cutting material is calculated.

5. The processing technology of the microphone annular tube according to claim 4, characterized in that: The size of the blank should be determined in terms of length, width and thickness according to the diameter, height, wall thickness of the microphone annular tube body and the elongation of the iron sheet material (1) after shaping.

6. The processing technology of the microphone annular tube according to claim 1, characterized in that: The blank (11) is laser deburred and laser cleaned before being fixed on the fixture for welding, so as to remove oil stains and burrs on the upper connecting plate (9) and the lower connecting plate (10).

7. The processing technology of the microphone annular tube according to claim 6, characterized in that: Before step three, the inner side of the upper connecting plate (9) of the blank (11) is chamfered (14) using a chamfering machine, and the depth of the chamfer (14) is greater than the distance between the thread groove (7) and the outer side surface of the annular tube body of the plate microphone.

8. The processing technology of the microphone annular tube according to claim 7, characterized in that: After the spot welding positioning in step three, the first seam (12) and the second seam (13) are observed to be qualified. If qualified, the outer sides of the first seam (12) and the second seam (13) are fixed by high-frequency laser full welding, and the welding depth is less than the distance between the thread groove (7) and the outer side of the annular tube body of the plate microphone.

9. The processing technology of the microphone annular tube body according to claim 8, characterized in that: During welding, a protective gas is provided to the welding points of the first joint (12) and the second joint (13) through a blowing device, the flow rate of the protective gas is less than 30 L / min, and the protective gas is one of argon, helium, nitrogen and carbon dioxide.

10. The processing technology of the microphone annular tube body according to claim 9, characterized in that: After the internal thread structure is machined in step 5, heat treatment is used to remove stress from the standard metal cylinder (2).

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