Stamping equipment for muffler housing

Abstract

The present invention relates to the field of mechanical equipment, and discloses a stamping and forming device for a muffler shell. The stamping and forming device of the present invention comprises: a base, a lower die, an upper die, a fixed seat and a supporting mechanism, the lower die and the fixed seat are arranged on the base, the supporting mechanism comprises: a supporting shaft, a push rod and a second driving mechanism, the supporting shaft is arranged on the fixed seat, the supporting shaft is provided with a penetrating supporting channel, the push rod is connected to the second driving mechanism, and the push rod can be slidably penetrated in the supporting channel of the supporting shaft. In the stamping and forming device of the present invention, the cylindrical body of the muffler shell is sleeved on the supporting shaft, the push rod extends into the supporting channel of the supporting shaft, so that the supporting shaft is stretched and expanded, the circumferential side wall of the supporting shaft is abutted against the inner wall of the cylindrical body, and effective support is provided for the cylindrical body of the muffler shell, the upper die and the lower die cooperate to stamp and form the side ears, the cylindrical body of the muffler shell will not be deformed, and the forming yield of the muffler shell is improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of mechanical equipment, and in particular to a stamping forming device for a muffler shell. Background Art

[0002] A silencer is a noise reduction device that uses pipes and elbows with sound-absorbing linings or pipes with sudden changes in cross-sectional area and other discontinuous acoustic impedance to attenuate or emit back the noise in air flow ducts with noise transmission.

[0003] The automobile muffler is used to reduce the noise generated when the engine is working. The muffler shell of the automobile muffler includes a cylindrical body and side ears. The side ears on both sides of the cylindrical body are formed by stamping.

[0004] However, in the prior art, when the side ears of the muffler shell are stamped, the cylindrical body of the muffler shell is easily deformed, thereby reducing the yield rate of the muffler shell. Summary of the invention

[0005] The object of the present invention is to provide a stamping forming device for a muffler shell to solve the problem of deformation of the cylindrical body of the muffler shell in the above-mentioned background technology.

[0006] The embodiment of the present invention provides a stamping and forming device for a muffler housing, comprising: a base, a lower die, an upper die, a fixing seat and a supporting mechanism;

[0007] The base is used for fixing;

[0008] The lower mold and the fixing seat are arranged on the base, and the lower mold is provided with a first cavity;

[0009] The upper die is arranged above the lower die and connected to the first driving mechanism, and the upper die is provided with a second cavity;

[0010] The support mechanism comprises: a support shaft, a push rod and a second driving mechanism;

[0011] The support shaft is horizontally arranged on the fixing seat and is located between the first cavity and the second cavity. The support shaft is provided with a penetrating support channel, and the support shaft is used for being sleeved by the muffler shell;

[0012] The push rod is connected to the second driving mechanism, and the push rod is slidably arranged in the support channel. The second driving mechanism is used to drive the push rod to extend into and withdraw from the support channel. When the push rod extends into the support channel, it is used to prop open the support shaft so that the support shaft abuts against the inner wall of the muffler housing.

[0013] The first driving mechanism is used to drive the upper die to approach and move away from the lower die. When the upper die is close to the lower die, it is used to punch the muffler housing sleeved on the supporting shaft.

[0014] Based on the above scheme, it can be known that the stamping and forming equipment of the muffler shell of the present invention is provided with a base, a lower die, an upper die, a fixed seat and a support mechanism. The support mechanism includes: a support shaft, a push rod and a second driving mechanism. The support shaft is horizontally arranged on the fixed seat. The support shaft is provided with a penetrating support channel. The push rod is connected to the second driving mechanism, and the push rod can be slidably penetrated in the support channel of the support shaft. In the stamping and forming equipment of the muffler shell of the present invention, the cylindrical body of the muffler shell is sleeved on the support shaft. The second driving mechanism drives the push rod to extend into the support channel of the support shaft, so that the support shaft is stretched and expanded. The circumferential side wall of the support shaft is against the inner wall of the cylindrical body, providing effective support for the cylindrical body of the muffler shell. The first driving mechanism drives the upper die to press downward. The upper die and the lower die cooperate to stamp and form the side ears of the muffler shell. The cylindrical body of the muffler shell will not be deformed, thereby improving the yield of the muffler shell.

[0015] In a feasible solution, it also includes: a limiting seat;

[0016] The limiting seat is arranged on the fixing seat;

[0017] The support shaft is arranged on the limit seat, and the support shaft comprises: a plurality of fan-shaped blocks;

[0018] The plurality of sector blocks are spliced ​​together to form the support shaft, one end of the sector block is provided with a protruding edge, and the protruding edge is arranged in the limiting seat.

[0019] In a feasible solution, the fixing seat is provided with a rectangular groove;

[0020] The limiting seat is clamped in the rectangular groove, and the limiting seat is abutted against the lower mold.

[0021] In a feasible solution, the limit seat includes: a first limit block, a second limit block and a third limit block;

[0022] The first limiting block and the third limiting block are respectively arranged on both sides of the second limiting block, and the first limiting block is arranged close to the fixing seat;

[0023] The inner hole of the second limiting block is larger than the inner holes of the first limiting block and the third limiting block, and a first sliding groove is formed between the first limiting block and the third limiting block;

[0024] The protruding edge is slidably disposed in the first sliding groove.

[0025] In a feasible solution, the inner hole diameter of the third limit block corresponds to the outer diameter of the muffler;

[0026] The sector block is provided with a step convex ring, the height of the step convex ring corresponds to the wall thickness of the muffler, and the limiting convex ring is used to limit the sliding of the sector block when it abuts against the third limiting block.

[0027] In a feasible solution, the end surface of the sector block is provided with a second slide groove;

[0028] The end surface of the first limiting block is provided with a slide bar, and the slide bar is embedded in the second slide groove, so that the sector block slides along the slide bar.

[0029] In a feasible solution, it also includes: a first return spring;

[0030] The side wall of the protruding edge is provided with a first slot, and the reset spring is clamped in the first slot of the protruding edge to reset the plurality of sector blocks.

[0031] In a feasible solution, it also includes: a second return spring;

[0032] A protruding block is provided at the other end of the sector block, and the protruding block is provided with a second slot;

[0033] The second return spring is clamped in the second clamping groove.

[0034] In a feasible solution, the support channel is conical;

[0035] The push rod is in a tapered shape adapted to the supporting channel.

[0036] In a feasible solution, it also includes: a guide rod;

[0037] The upper die is provided with a guide hole;

[0038] The guide rod is arranged on the lower mold and penetrates into the guide hole, so that the lower mold moves up and down along the guide rod;

[0039] Furthermore, the first cavity and the second cavity are both in an arc shape that matches the muffler housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0041] Figure 1 is a schematic diagram of a muffler housing in the present invention;

[0042] Figure 2 It is a schematic diagram of a stamping and forming device for a muffler housing in an embodiment of the present invention;

[0043] Figure 3 is a schematic diagram of the installation of the support shaft in an embodiment of the present invention;

[0044] Figure 4 is a schematic diagram of a limit seat in an embodiment of the present invention;

[0045] Figure 5 In the embodiment of the present invention Figure 4 The enlarged view of A in FIG.

[0046] Figure 6 is a schematic diagram of a support mechanism in an embodiment of the present invention;

[0047] Figure 7 Schematic diagram of a support shaft in an embodiment of the present invention.

[0048] Numbers in the figure:

[0049] 1. Muffler shell; 11. Cylindrical body; 12. Side ears; 2. Base; 31. Lower mold; 311. First cavity; 32. Upper mold; 321. Second cavity; 322. Guide hole; 4. Fixed seat; 41. Rectangular groove; 5. Support mechanism; 51. Support shaft; 511. Fan-shaped block; 5111. Protruding edge; 5112. Step convex ring; 5113. Second slide groove; 5114. First clamping groove; 5115. Protruding block; 5116. Second clamping groove; 52. Push rod; 6. Limit seat; 61. First limit block; 62. Second limit block; 63. Third limit block. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0052] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0054] As described in the background technology of this application, the automobile muffler is used to reduce the noise generated when the engine is working. The muffler shell of the automobile muffler includes a cylindrical body and side ears. The side ears are located on both sides of the cylindrical body, and the side ears on both sides are formed by stamping equipment.

[0055] The inventor of the present application has found that in the prior art, when the side ears of the muffler shell are stamped, the cylindrical body of the muffler shell is easily deformed, thereby reducing the yield rate of the muffler shell.

[0056] In order to solve the above problems, the inventor of the present application proposed the technical solution of the present application, and the specific embodiments are as follows:

[0057] Figure 1 is a schematic diagram of the muffler housing in the present invention, Figure 2 is a schematic diagram of a stamping and forming device for a muffler housing in an embodiment of the present invention, Figure 3 is a schematic diagram of the installation of the support shaft in an embodiment of the present invention, Figure 4 is a schematic diagram of a limit seat in an embodiment of the present invention, Figure 5 In the embodiment of the present invention Figure 4 The enlarged view of A in Figure 6is a schematic diagram of a support mechanism in an embodiment of the present invention, Figure 7 Schematic diagram of a support shaft in an embodiment of the present invention.

[0058] like Figure 1 As shown, the muffler housing 1 in the present invention comprises: a cylindrical body 11 and side ears 12. The side ears 12 are arranged on both sides of the circumference of the cylindrical body 11, and the side ears 12 are stamped by a stamping device.

[0059] like Figures 2 to 7 As shown, the stamping and forming equipment for the muffler housing of this embodiment includes: a base 2, a lower die 31, an upper die 32, a fixing seat 4 and a supporting mechanism 5.

[0060] The base 2 is fixedly arranged on the machine platform of the stamping equipment.

[0061] The lower mold 31 and the fixing seat 4 are fixedly arranged on the base 2 . The fixing seat 4 is located at one side of the lower mold 31 . A first cavity 311 is arranged on the top surface of the lower mold 31 .

[0062] The upper mold 32 is arranged above the lower mold 31. The upper mold 32 is connected to the first driving mechanism of the stamping equipment (not shown in the figure). The first driving mechanism drives the upper mold 32 to move up and down, so that the upper mold 32 approaches and / or moves away from the lower mold 31. A second cavity 321 is provided at the bottom of the upper mold 32.

[0063] The supporting mechanism 5 includes a supporting shaft 51 , a push rod 52 and a second driving mechanism.

[0064] The support shaft 51 is arranged horizontally, one end of the support shaft 51 is arranged on the fixing seat 4, and the support shaft 51 is located between the first cavity 311 of the lower mold 31 and the second cavity 321 of the upper mold 32. A support channel is arranged inside the support shaft 5 to pass through the left and right sides, the central axis of the support channel is arranged to coincide with the central axis of the support shaft 51, and the aperture of the support channel is smaller than the outer diameter of the push rod 52.

[0065] The second driving mechanism (not shown) is arranged on the side of the base 2 away from the lower mold 31, one end (left end) of the push rod 52 is connected to the second driving mechanism, and the push rod 52 is slidably arranged in the support channel of the support shaft 51, and the outer diameter of the push rod 52 is larger than the aperture of the support channel of the support shaft 51. The second driving mechanism drives the push rod 52 to move left and right, so that the push rod 52 extends into and / or exits the support channel of the support shaft 51. In this embodiment, the first driving mechanism and the second driving mechanism are preferably hydraulic cylinders.

[0066] When the stamping and forming equipment of this embodiment is used, the cylindrical body of the muffler shell is sleeved on the support shaft, and the second driving mechanism drives the push rod to move. When the push rod extends into the support channel of the support shaft, the support shaft is expanded, and the circumferential outer wall of the support shaft and the inner wall of the cylindrical body are abutted to provide support for the cylindrical body of the muffler shell. The first driving mechanism drives the upper mold to move downward, and the upper mold cooperates with the lower mold to stamp and form the side ears on both sides of the muffler shell, and the cylindrical body of the muffler shell will not be deformed.

[0067] It is not difficult to find from the above content that the stamping and forming equipment of the muffler shell of this embodiment is provided with a base, a lower die, an upper die, a fixed seat and a support mechanism, and the support mechanism includes: a support shaft, a push rod and a second driving mechanism, the support shaft is horizontally arranged on the fixed seat, the support shaft is provided with a penetrating support channel, the push rod is connected to the second driving mechanism, and the push rod can be slidably penetrated in the support channel of the support shaft. In the stamping and forming equipment of the muffler shell of this embodiment, the cylindrical body of the muffler shell is sleeved on the support shaft, the second driving mechanism drives the push rod to extend into the support channel of the support shaft, so that the support shaft is expanded, the circumferential side wall of the support shaft is against the inner wall of the cylindrical body, and effective support is provided for the cylindrical body of the muffler shell, the first driving mechanism drives the upper die to press downward, and the upper die and the lower die cooperate to stamp and form the side ears of the muffler shell, the cylindrical body of the muffler shell will not be deformed, and the yield of the muffler shell is improved.

[0068] Optional, such as Figure 3 , Figure 4 , Figure 5 As shown, the stamping and forming equipment for the muffler shell of this embodiment further includes: a limiting seat 6.

[0069] The limiting seat 6 is disposed on the fixing seat 4 . The limiting seat 6 is provided with an inner hole for the push rod 52 and the support shaft 51 to pass through. The inner hole diameter of the limiting seat 6 is larger than the outer diameter of the support shaft 51 .

[0070] The support shaft 51 includes a plurality of (eight) sector blocks 511 .

[0071] A plurality of fan-shaped blocks 511 are spliced ​​together to form a support shaft 51, and the middle parts of the spliced ​​plurality of fan-shaped blocks 511 form a support channel of the support shaft. A protruding edge 5111 is provided at one end of the fan-shaped block 511 close to the fixed seat 4, and the end of the fan-shaped block 511 is inserted into the inner hole of the limit seat 6. The protruding edge 5111 on the fan-shaped block 511 is arranged in the limit seat 6. When the push rod 52 extends into the support channel of the support shaft 51, the support shaft 51 can expand and stretch in the inner hole of the limit seat 6.

[0072] Furthermore, in the stamping and forming equipment for the muffler housing of the present embodiment, a rectangular groove 41 is provided on one side of the fixing seat 4 close to the lower die 31 .

[0073] The limiting seat 6 is clamped in the rectangular groove 41 of the fixing seat 4, and the outer side surface of the limiting seat 6 abuts against the side surface of the lower mold 31, so that the limiting seat is more stable.

[0074] Furthermore, in the stamping and forming equipment for the muffler housing in this embodiment, the limiting seat 6 includes: a first limiting block 61 , a second limiting block 62 and a third limiting block 63 .

[0075] The first limit block 61 and the third limit block 63 are arranged on both sides of the second limit block 62 in a mirror-symmetrical manner, and the first limit block 61 is arranged close to the side of the fixing seat 4. The inner hole diameter of the second limit block 62 is larger than the inner hole diameters of the first limit block 61 and the third limit block 63, and a first slide groove is formed between the end face of the first limit block 61, the end face of the third limit block 63, and the inner wall of the inner hole of the second limit block 62.

[0076] The protruding edges 5111 at the ends of the multiple sector blocks 511 of the support shaft 51 can be slidably clamped in the first sliding groove between the first limit block 61 and the third limit block 63. When the support shaft 51 is stretched, the protruding edges 5111 of the sector blocks slide in the first sliding groove.

[0077] Furthermore, in the stamping and forming equipment of the muffler shell in this embodiment, the inner hole diameter of the third limit block 63 corresponds to the outer diameter of the cylindrical body 11 of the muffler shell.

[0078] The sector block 511 is provided with a step convex ring 5112 near the protruding edge 5111, and the height of the step convex ring 5112 corresponds to the wall thickness of the cylindrical body 11 of the muffler housing. Driven by the second driving mechanism, the push rod extends into the support channel of the support shaft, and the sector block slides outward and stretches. When the circumferential side wall of the sector block abuts against the inner wall of the cylindrical body, the step convex ring 5112 of the sector block abuts against the inner hole wall of the third limit block 61, and the third limit block 61 forms a limit on the sector block, so that the sector block stops expanding outward, thereby preventing the cylindrical body of the muffler housing from being damaged.

[0079] Further, such as Figure 6 As shown, in the stamping and forming equipment for the muffler shell in this embodiment, the end surface of the sector block 511 is provided with a second slide groove 5113 .

[0080] The end surface of the first limit block 61 is provided with a plurality of slide bars (not shown) corresponding to the second slide grooves 5113 on the plurality of sector blocks 511. The second slide grooves 5113 on the end surfaces of the plurality of sector blocks 511 are plugged into the plurality of slide bars of the first limit block 61, so that the sector blocks are expanded or retracted along the slide bars of the first limit block.

[0081] Furthermore, the stamping and forming equipment for the muffler housing in this embodiment further includes: a first return spring.

[0082] A first clamping groove 5114 is provided on the circumferential side wall of the protruding edge 5111 at the end of the sector block 511. A first reset spring (not shown) is sleeved on the circumferential side wall formed by splicing a plurality of sector blocks 511, and the first reset spring is embedded in the first clamping groove 5114 of the protruding edge 5111. When the push rod 52 extends into the support channel of the support shaft 52, the first reset spring is stretched; when the push rod withdraws from the support shaft, the plurality of sector blocks can be quickly reset under the action of the first reset spring.

[0083] Further, such as Figure 5 As shown, the stamping and forming equipment for the muffler housing in this embodiment further includes: a second return spring.

[0084] The plurality of sector blocks 511 are each provided with a sector-shaped protruding block 5115 at one end away from the protruding edge 5111 . The protruding block 5115 is arranged close to the inner side of the sector block 511 . A second slot 5116 is provided between the protruding block 5115 and the end surface of the sector block 511 .

[0085] The second return spring (not shown) is sleeved on the circumferential side wall formed by a plurality of protruding blocks 5115, and the second return spring is clamped in the second clamping groove 5116 of the protruding block 5115. When the push rod withdraws from the support shaft, the plurality of fan-shaped blocks can be quickly and smoothly reset under the action of the first return spring and the second return spring, so that the formed muffler housing can be removed from the support shaft conveniently.

[0086] Further, such as Figure 7 As shown, in the stamping and forming equipment for the muffler shell in this embodiment, the support channel inside the support shaft 51 is conical.

[0087] The push rod 52 is also tapered, and the taper of the push rod 52 is consistent with the taper of the support channel of the support shaft 51. When the push rod is inserted into the support channel of the support shaft, the circumferential side wall of the push rod is completely fitted with the hole wall of the support shaft to provide better support for the support shaft.

[0088] Optionally, the stamping and forming equipment for the muffler shell in this embodiment further includes: a guide rod.

[0089] The four corners of the upper mold 32 are provided with penetrating guide holes 322 .

[0090] Guide rods (not shown) are arranged at the four vertices of the lower die 31, and the guide rods are slidably inserted into the guide holes of the upper die, so that the upper die moves up and down along the guide rods.

[0091] The first cavity 311 of the lower mold and the second cavity 321 of the upper mold are both semicircular, and the arcs of the first cavity 311 and the second cavity 321 match the arcs of the cylindrical body of the muffler shell. When the side ears of the muffler shell are stamped, the first cavity and the second cavity cover the cylindrical body of the muffler shell, and the lower mold and the upper mold provide support for the circumferential side wall of the cylindrical body. The cylindrical body of the muffler shell is more stable and will not be deformed.

[0092] In the present invention, unless otherwise clearly specified and limited, a first feature being “on” or “under” a second feature may mean that the first feature and the second feature are in direct contact, or the first feature and the second feature are in indirect contact via an intermediate medium.

[0093] Moreover, the first feature being “above”, “above”, and “above” the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being “below”, “below”, and “below” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0094] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stamping forming device for a muffler housing, characterized in that: include: Base, lower die, upper die, fixed seat and supporting mechanism; The base is fixedly arranged on the machine platform of the stamping and forming equipment; The lower mold and the fixing seat are arranged on the base, and the lower mold is provided with a first cavity; The upper die is arranged above the lower die and connected to the first driving mechanism, and the upper die is provided with a second cavity; The support mechanism comprises: a support shaft, a push rod and a second driving mechanism; The support shaft is horizontally arranged on the fixing seat and is located between the first cavity and the second cavity. The support shaft is provided with a penetrating support channel, and the support shaft is used for being sleeved by the muffler shell; The push rod is connected to the second driving mechanism, and the push rod is slidably arranged in the support channel. The second driving mechanism is used to drive the push rod to extend into and withdraw from the support channel. When the push rod extends into the support channel, it is used to prop open the support shaft so that the support shaft abuts against the inner wall of the muffler housing. The first driving mechanism is used to drive the upper die to approach and move away from the lower die, and the upper die is used to punch the muffler housing sleeved on the supporting shaft when approaching the lower die; Also includes: limited seat; The limiting seat is arranged on the fixing seat; The support shaft is arranged on the limit seat, and the support shaft comprises: a plurality of fan-shaped blocks; The plurality of sector blocks are spliced ​​to form the support shaft, one end of the sector block is provided with a protruding edge, and the protruding edge is arranged in the limiting seat; The fixing seat is provided with a rectangular groove; The limit seat is clamped in the rectangular groove, and the limit seat is abutted against the lower mold; The limiting seat comprises: a first limiting block, a second limiting block and a third limiting block; The first limiting block and the third limiting block are respectively arranged on both sides of the second limiting block, and the first limiting block is arranged close to the fixing seat; The inner hole of the second limiting block is larger than the inner holes of the first limiting block and the third limiting block, and a first sliding groove is formed between the first limiting block and the third limiting block; The protruding edge is slidably disposed in the first sliding groove; The inner hole diameter of the third limiting block corresponds to the outer diameter of the muffler; The sector block is provided with a step convex ring, the height of the step convex ring corresponds to the wall thickness of the muffler, and the step convex ring is used to limit the sliding of the sector block when it abuts against the third limit block; The supporting channel is conical; The push rod is in a conical shape adapted to the support channel; Also includes: a guide rod; The upper die is provided with a guide hole; The guide rod is arranged on the lower mold and penetrates into the guide hole, so that the lower mold moves up and down along the guide rod; Furthermore, the first cavity and the second cavity are both in an arc shape that matches the muffler housing.

2. The stamping and forming equipment for the muffler housing according to claim 1, characterized in that: The end surface of the sector block is provided with a second slide groove; The end surface of the first limiting block is provided with a slide bar, and the slide bar is embedded in the second slide groove, so that the sector block slides along the slide bar.

3. The stamping and forming equipment for the muffler housing according to claim 2, characterized in that: Also includes: a first return spring; The side wall of the protruding edge is provided with a first slot, and the reset spring is clamped in the first slot of the protruding edge to reset the plurality of sector blocks.

4. The stamping and forming equipment for the muffler housing according to claim 2, characterized in that: Also includes: a second return spring; A protruding block is provided at the other end of the sector block, and the protruding block is provided with a second slot; The second return spring is clamped in the second clamping groove.

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