A tool for flanging a partition plate of a vehicle muffler

Abstract

The utility model discloses a kind of tools for automobile muffler partition plate flanging, including compression nut, flanging punch, upper guide sleeve, lower guide sleeve, rubber pad, compression screw, lower supporting block and mounting base, one end of compression screw is fixedly installed on mounting base, the other end of compression screw sequentially passes through lower supporting block, rubber pad and flanging punch from bottom to top, finally is threadedly connected with compression nut, lower guide sleeve is nested in the outside of rubber pad, its bottom end is abutted with lower supporting block, flanging punch is divided into limiting area, forming area and guide area from top to bottom. The utility model structure is simple, and high verticality of flanging can be realized with high machining precision, simple operation, without equipment driving, and flanging quality is stable.

Description

Technical Field

[0001] This utility model relates to the field of automotive muffler partition processing technology, specifically a tool for drilling holes in automotive muffler partitions. Background Technology

[0002] Automotive mufflers use a complex internal structure to reduce or eliminate noise at specific frequencies generated by the engine, ultimately ensuring that the exhaust noise meets national standards and customer requirements. However, a crucial aspect of achieving this is the targeted design of the baffle based on simulation and experimental results; this entire internal structure design process is known in the industry as sound tuning. The baffle is a thin-plate stamped part, with a thickness between 0.8 and 1.2 mm. Prototype production requires the design scheme to pass simulation analysis before prototypes are manufactured. Due to the rapid development, fast iteration, and short development cycle of the domestic automotive industry, prototype production presents new challenges.

[0003] There are currently two ways to make partition samples. The first way is that after the engineer completes the design, he converts the partition design into drawings and sends them to the partition supplier. The supplier then develops a temporary special mold according to the drawings to stamp the sample. The second way is to make the sample entirely by hand without opening a mold. In this case, the partition may not have holes or the holes may not be perpendicular.

[0004] While the first method produces high-quality prototypes, the cost of specialized molds is high, and the development cycle is long, extending the overall development timeline and leading to increased prototype costs. The second method is lower in cost and shorter in cycle time, but the quality of hand-made parts is inconsistent, and non-perforated partitions require full-circle welding around the mating areas after assembly. This can directly affect the prototype testing results.

[0005] The information disclosed in the above background section is only intended to enhance the understanding of the overall background of this utility model, and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] In view of the above-mentioned defects, the purpose of this utility model is to provide a tool for flipping holes in automotive muffler baffles. It has a simple structure, high processing accuracy, can achieve high verticality of the flipping holes, is easy to operate, does not require equipment drive, and has stable quality.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A tool for flanging a car muffler baffle includes a clamping nut, a flanging punch, an upper guide sleeve, a lower guide sleeve, a rubber pad, a clamping screw, a lower support block, and a mounting base. One end of the clamping screw is fixedly mounted on the mounting base, and the other end of the clamping screw passes through the lower support block, the rubber pad, and the flanging punch sequentially from bottom to top, finally connecting with the clamping nut by threads. The lower guide sleeve is nested on the outside of the rubber pad, and its bottom end abuts against the lower support block. The flanging punch is divided into a limiting area, a forming area, and a guiding area from top to bottom, and its cross-sectional diameter decreases in a stepped manner. The cross-sectional diameter of the limiting area is larger than the inner diameter of the upper guide sleeve, the cross-sectional diameter of the forming area is the inner diameter after flanging, and the cross-sectional diameter of the guiding area is the inner diameter before flanging. The upper guide sleeve is nested in the forming area of ​​the flanging punch, and the sum of the inner diameter of the upper guide sleeve and twice the flanging thickness is equal to the inner diameter of the lower guide sleeve.

[0009] Furthermore, it also includes a clamping washer, which is disposed between the clamping nut and the flanging punch.

[0010] Furthermore, it also includes support block bolts, which pass through the mounting base and are threadedly connected to the lower support block, and the lower support block is fastened to the mounting base by the support block bolts.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The present invention discloses a simple tool for flanging automotive muffler baffles. Through the stepped shape design of the flanging punch, it achieves precise alignment and flanging. The tool has a simple structure, is easy to operate manually, does not require equipment drive, and has stable flanging quality and high flanging accuracy. Attached Figure Description

[0013] Figure 1 This is an exploded view of the partition hole-flipping tool described in this utility model;

[0014] Figure 2 This is a schematic diagram of the assembly of the partition flipping tool before it is flipped.

[0015] Figure 3 This is a schematic diagram of the assembly of the partition flipping tool after it has been flipped.

[0016] In the diagram, 1-compression nut; 2-compression washer; 3-flanging punch; 4-upper guide sleeve; 5-partition plate; 6-lower guide sleeve; 7-rubber pad; 8-lower support block; 10-mounting base; 11-support block bolt; 9-compression screw; 301-limiting area; 302-forming area; 303-guiding area. Detailed Implementation

[0017] To explain the technical content, objectives, and effects of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings. In the description of these embodiments, it should be understood that terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing these embodiments and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] like Figure 1-3 The tool shown is for flanging a car muffler baffle, comprising a clamping nut 1, a flanging punch 3, an upper guide sleeve 4, a lower guide sleeve 6, a rubber pad 7, a clamping screw 9, a lower support block 8, and a mounting base 10. One end of the clamping screw 9 is fixedly mounted on the mounting base 10, and the other end of the clamping screw 9 passes through the lower support block 8, the rubber pad 7, and the flanging punch 3 from bottom to top, and is finally threadedly connected to the clamping nut 1. The lower guide sleeve 6 is nested outside the rubber pad 7, and its bottom end is connected to the lower support block 8. Block 8 abuts, and the flanging punch 3 is divided into a limiting area 301, a forming area 302 and a guiding area 303 from top to bottom. Its cross-sectional diameter decreases in a stepped manner. The cross-sectional diameter of the limiting area 301 is larger than the inner diameter of the upper guide sleeve 4. The cross-sectional diameter of the forming area 302 is the inner diameter after flanging. The cross-sectional diameter of the guiding area 303 is the inner diameter before flanging. The upper guide sleeve 4 is nested in the forming area of ​​the flanging punch. The sum of the inner diameter of the upper guide sleeve 4 and twice the flanging thickness is equal to the inner diameter of the lower guide sleeve 6.

[0019] The working principle of this utility model is as follows: First, one end of the clamping screw 9 is fixedly installed on the mounting base 10. Then, the lower support block 8 and the rubber pad 7 are installed into the clamping screw 9. Next, the lower guide sleeve 6 is nested on the outside of the rubber pad 7. The flipping hole of the partition 5 to be flipped is passed through the clamping screw 9. Then, the upper guide sleeve 4 is installed into the clamping screw 9 and abuts against the partition 2. Then, the flipping punch 3 is nested into the upper guide sleeve 4. The guide area 303 at the lower end of the flipping punch 3 is aligned with the flipping hole of the partition 2. Finally, the clamping nut 1 is screwed into the upper end of the clamping screw 9. This completes the preparation for the flipping operation. Figure 2 As shown. By continuously tightening the clamping nut 1, the clamping nut 1 moves downward, pushing the flanging punch 3 downward until the forming area 302 of the flanging punch 3 exceeds the bottom end of the flanging, as shown. Figure 3 At this time, the limiting area 301 of the flanging punch 3 is precisely engaged with the top of the upper guide sleeve 4, thus completing the flanging operation. By continuously twisting the clamping nut 1 in the opposite direction, the clamping nut 1 is moved upward until it is disengaged from the clamping screw 9. Then, the upper guide sleeve 4 and the flanging punch 3 are lifted until they are disengaged from the clamping screw 9. The flanged partition 5 can then be removed, and another new partition 5 can be inserted to perform the flanging operation of the second partition 5.

[0020] The present invention describes a simple tool for flanging automotive muffler baffles. Through the stepped shape design of the flanging punch 3, it achieves precise alignment and flanging. The tool has a simple structure, is easy to operate manually, does not require equipment drive, and has stable flanging quality and high flanging precision.

[0021] As a preferred embodiment of the above-described method, a clamping washer 2 is further included, which is disposed between the clamping nut 1 and the flanging punch 3. The clamping washer 2 can reduce wear on the flanging punch 3.

[0022] As a preferred embodiment of the above-described method, a support block bolt 11 is further included. The support block bolt 11 passes through the mounting base 10 and is threadedly connected to the lower support block 8. The lower support block 8 is fastened to the mounting base 10 by the support block bolt 11. This method can better secure the lower support block.

[0023] Although the present invention has been described in detail above with specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A tool for drilling holes in an automotive muffler baffle, characterized in that: The device includes a clamping nut, a flanging punch, an upper guide sleeve, a lower guide sleeve, a rubber pad, a clamping screw, a lower support block, and a mounting base. One end of the clamping screw is fixedly mounted on the mounting base, and the other end of the clamping screw passes through the lower support block, the rubber pad, and the flanging punch sequentially from bottom to top, finally connecting with the clamping nut by threads. The lower guide sleeve is nested on the outside of the rubber pad, and its bottom end abuts against the lower support block. The flanging punch is divided into a limiting area, a forming area, and a guiding area from top to bottom, with its cross-sectional diameter decreasing in a stepped manner. The cross-sectional diameter of the limiting area is larger than the inner diameter of the upper guide sleeve, the cross-sectional diameter of the forming area is the inner diameter after flanging, and the cross-sectional diameter of the guiding area is the inner diameter before flanging. The upper guide sleeve is nested in the forming area of ​​the flanging punch, and the sum of the inner diameter of the upper guide sleeve and twice the flanging thickness is equal to the inner diameter of the lower guide sleeve.

2. The tool for drilling holes in an automotive muffler baffle according to claim 1, characterized in that: It also includes a clamping washer, which is disposed between the clamping nut and the flanging punch.

3. The tool for drilling holes in an automotive muffler baffle according to claim 1, characterized in that: It also includes support block bolts, which pass through the mounting base and are threadedly connected to the lower support block, and the lower support block is fastened to the mounting base by the support block bolts.

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