A stamping and flanging device for a muffler shell

Abstract

The present invention belongs to the technical field of parts stamping and flanging devices, specifically a muffler shell stamping and flanging device, including a support, the top of the support is connected to a housing, the housing is provided with a stamping mechanism for stamping a cylindrical shell into an elliptical shell, and the rear inner wall of the housing is provided with two left and right mounting frames that can be close to each other, and the mounting frames are provided with a flanging mechanism. The contact rod can always keep in contact with the outer wall of the rotating cylindrical or elliptical shell through spring I, so that the pressure block always keeps in contact with the outer wall of the cylindrical or elliptical shell, the support block always keeps in contact with the inner wall of the cylindrical or elliptical shell, and the arc flanging rod always keeps in contact with the inner wall of the cylindrical or elliptical shell when moving up to perform precise flanging operation, avoiding dislocation or deformation during the flanging process, and achieving the effect of not only being able to flanging the cylindrical shell, but also being able to flanging the elliptical shell.

Description

Technical Field

[0001] The invention belongs to the technical field of parts stamping and flanging devices, in particular to a stamping and flanging device for a muffler shell. Background Art

[0002] A muffler is a device used to reduce the noise generated by a motor vehicle engine when it is working. The shell of the muffler is the outermost structure of the muffler, usually made of metal, such as stainless steel or galvanized steel. The main function of the shell is to protect the internal muffler materials and other components, and to separate the external noise from the internal absorbed noise. In order to enhance the structural strength, sealing or ability to connect other components of the muffler, the edge of the muffler shell (shell) needs to be flanging to form a convex or concave with a certain angle or shape.

[0003] After searching, the patent publication number is: CN219944256U, a flanging device for muffler production, including a base plate, and propulsion mechanisms are symmetrically installed on both sides of the base plate, the propulsion mechanism is used to push the mounting plate to move, and the mounting plate is installed with a rotating drive mechanism; a position adjustment mechanism is installed on the mounting plate, and the position adjustment mechanism is used to drive the mounting frame to move, and a U-shaped frame is installed on the mounting frame through a rotating mechanism, and a flanging frame is fixed on the U-shaped frame, and the flanging frame drives two flanging wheels to move relative to each other through a counter-moving mechanism, and the wheel axle in the middle of one of the flanging wheels is fixedly connected to the output shaft of the flanging motor.

[0004] Although the above patent can achieve flanging of both ends of the muffler shell at the same time through two sets of left and right flanging wheels, the spacing between the two flanging wheels in each set of the above patent is adjusted by a bidirectional screw, and cannot adapt to the shape of the shell. Therefore, the above patent can only flanging cylindrical shells, and the shape of the muffler shell is not limited to cylindrical, but also has elliptical cylindrical design. Since the above patent cannot adapt to the elliptical cylindrical shell, the above patent cannot flanging the elliptical cylindrical shell, and its practicality is not ideal and its versatility is not high. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a muffler shell stamping and flanging device that can not only flanging a cylindrical shell but also flanging an elliptical shell.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a muffler shell stamping and flanging device, including a support, the top of the support is connected to the casing, the top, bottom and front side of the casing are all open-type settings, the casing is provided with a stamping mechanism for stamping a cylindrical casing into an elliptical cylindrical casing, the stamping mechanism includes a fixed frame, a hydraulic cylinder and a stamping die, the top of the casing and the support are both connected to a fixed frame, a hydraulic cylinder is installed on the fixed frame, a stamping die is installed on the telescopic rod of the hydraulic cylinder, the stamping die on the lower side is slidably matched with the top of the support, two left and right mounting frames that can be close to each other are provided on the rear inner wall of the casing, a double-axis screw motor is provided on the rear inner wall of the casing, the two screws on the double-axis screw motor are respectively threadedly connected to the two mounting frames, and a flanging mechanism is provided on the mounting frame The flanging mechanism includes a lifting frame slidably connected to the mounting frame through a sliding rod Ⅰ, a spring Ⅰ is connected between the lifting frame and the mounting frame, a lifting plate is provided on the side where the two lifting frames are close to each other, and a contact rod is connected on the side where the two lifting frames are close to each other, and the two contact rods are located between the two lifting plates, and a slider that can move up and down is provided on the lifting frame, and an arc-shaped flanging rod is connected to the slider, and a pressure block is connected to the bottom of the lifting plate, and the two pressure blocks are located between the two arc-shaped flanging rods, and the sides of the two pressure blocks facing away from each other are arc-shaped, and a driving component for driving the lifting plate and the slider to move up and down is provided on the lifting frame, and an electric clamp for clamping the shell is rotatably provided at the lower part of the mounting frame, and the electric clamp is located at the lower side of the lifting frame, and a rotating mechanism for driving the electric clamp to rotate is provided on the rear inner wall of the shell.

[0007] As a further optimization scheme of the present invention, the flanging mechanism also includes support blocks respectively connected to the lower part of the two lifting frames, the two support blocks are respectively located at the lower side of the two pressure blocks, and the support blocks are provided with openings for the arc-shaped flanging rod to move up and down.

[0008] As a further optimization scheme of the present invention, the driving assembly includes a screw rod I rotatably connected to the upper part of the lifting frame, the screw rod I is threadedly connected to the lifting plate, the lifting frame is rotatably connected to a screw rod II, the screw rod II is threadedly connected to the slider, the upper parts of the screw rods II and I are both connected to spur gears, a servo motor is installed on the upper part of the lifting frame, a missing gear is connected to the output shaft of the servo motor, and the missing gear can rotate to engage with the spur gear.

[0009] As a further optimization scheme of the present invention, the electric clamp includes a circular tube rotatably connected to the lower part of the mounting frame, an electric push rod is installed in the circular tube, a movable disc is connected to the telescopic rod of the electric push rod, a fixed disc is connected to the end of the circular tube away from the mounting frame on the same side, the front and rear sides of the movable disc are rotatably connected to clamping arms through a rotating shaft, the clamping part of the clamping arm is arc-shaped, a column gear is connected to the rotating shaft, and the front and rear sides of the fixed disc are connected to racks, and the racks and the column gears are meshed.

[0010] As a further optimization scheme of the present invention, the rotating mechanism includes a dual-axis drive motor installed on the inner wall of the rear side of the casing, the dual-axis drive motor is located below the dual-axis screw motor, and spline shafts are connected to the output shafts on both sides of the dual-axis drive motor. The spline shafts are rotatably connected to the casing, and spline sleeves are sleeved on the spline shafts. The two spline sleeves are rotatably connected to the two mounting frames respectively, and the two spline sleeves are respectively connected to the two round tubes through a belt drive assembly.

[0011] As a further optimization solution of the present invention, grinding wheels are obliquely installed on the sides of the two pressing blocks that are away from each other.

[0012] As a further optimization scheme of the present invention, a cleaning mechanism for cleaning grinding debris is provided on the rear side of the casing. The cleaning mechanism includes two left and right brushes that are slidably connected to the casing through a slide rod II and can move back and forth. The brushes are located inside the casing and below the spline shaft. A spring II is connected between the brushes and the casing.

[0013] As a further optimization solution of the present invention, the top of the support block and the clamping portion of the clamping arm are both arc-shaped.

[0014] The beneficial effects of the present invention have the following advantages compared with the prior art:

[0015] 1. The contact rod can always be kept in contact with the outer wall of the rotating cylindrical or elliptical shell by means of spring I, so that the pressure block can always be kept in contact with the outer wall of the cylindrical or elliptical shell, the support block can always be kept in contact with the inner wall of the cylindrical or elliptical shell, and the arc-shaped flanging rod can always be kept in contact with the inner wall of the cylindrical or elliptical shell when moving upward to perform precise flanging operation, thereby avoiding misalignment or deformation during the flanging process. Therefore, the present invention can adapt to the shape of the shell, achieving the effect of not only being able to flanging a cylindrical shell, but also being able to flanging an elliptical shell.

[0016] 2. The flange arc on the shell can be polished by a grinding wheel to remove burrs or sharp edges on the flange arc, thereby improving the surface quality of the flange arc and further improving the aesthetics of the shell.

[0017] 3. The spring II can keep the brush in close contact with the flange arc on the shell to clean the grinding debris adhering to the flange arc, thereby improving the appearance quality of the flange arc and further improving the appearance quality of the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the stamping mechanism of the present invention.

[0020] Figure 3 It is a partial three-dimensional structural schematic diagram of the present invention.

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the driving assembly of the present invention.

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the electric clamp of the present invention.

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the rotating mechanism of the present invention.

[0024] Figure 7 It is a three-dimensional structural schematic diagram of the cleaning mechanism of the present invention.

[0025] Serial numbers in the figure: 1- housing, 21- fixed frame, 22- hydraulic cylinder, 23- stamping die, 3- mounting frame, 4- double-axis screw motor, 51- slide rod Ⅰ, 52- lifting frame, 53- contact rod, 54- spring Ⅰ, 55- lifting plate, 56- pressure block, 57- support block, 58- slide block, 59- arc flanging rod, 510- port, 511- screw rod Ⅰ, 512- screw rod Ⅱ, 513- spur gear, 514- servo Servo motor, 515-missing gear, 6-electric clamp, 61-round tube, 62-electric push rod, 63-movable disc, 64-fixed disc, 65-rotating shaft, 66-clamping arm, 67-column gear, 68-rack, 71-double-axis drive motor, 72-spline shaft, 73-spline sleeve, 74-belt drive assembly, 8-grinding wheel, 91-slide bar II, 92-brush, 93-spring II, 10-support, 11-housing. DETAILED DESCRIPTION

[0026] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0027] Embodiment: A stamping and flanging device for a muffler housing, see Figure 1-Figure 6, including a support 10, the top of the support 10 is connected to a casing 1, the top, bottom and front side of the casing 1 are all open-type settings, the casing 1 is provided with a stamping mechanism for stamping a cylindrical casing 11 into an elliptical cylindrical casing 11, the stamping mechanism includes a fixed frame 21, a hydraulic cylinder 22 and a stamping die 23, the middle of the top of the casing 1 and the middle of the inner top of the support 10 are connected with a fixed frame 21, a hydraulic cylinder 22 is installed on the fixed frame 21, and a stamping die 23 is installed on the telescopic rod of the hydraulic cylinder 22, and an inlet and outlet are opened on the top of the support 10 for the lower stamping die 23 to enter and exit, and the rear inner wall of the casing 1 is slidably connected with two left and right mounting frames 3 that can approach each other through a slide groove, and a double-axis screw motor is provided on the rear inner wall of the casing 1 4. The double-axis screw motor 4 is composed of a double-axis motor and two screws. The double-axis motor is installed on the inner wall of the rear side of the casing 1. The two screws are respectively installed on the output shafts on both sides of the double-axis motor and are rotatably connected to the casing 1. The two screws are respectively threadedly connected to the two mounting frames 3. The double-axis motor is controlled to drive the two screws to rotate so that the two mounting frames 3 are close to each other. The double-axis motor is controlled to drive the two screws to reverse so that the two mounting frames 3 are away from each other. A flanging mechanism is provided on the mounting frame 3. The flanging mechanism includes a lifting frame 52 slidably connected to the mounting frame 3 through a sliding rod Ⅰ51. A spring Ⅰ54 is sleeved on the sliding rod Ⅰ51. The spring Ⅰ54 abuts against the lifting frame 52 and the mounting frame 3. The two lifting frames 52 are slidably connected to each other on one side through a guide rod. There is a lifting plate 55, and the sides of the two lifting frames 52 close to each other are connected with contact rods 53, and the two contact rods 53 are located between the two lifting plates 55. The lifting frame 52 is slidably connected with a slider 58 that can move up and down through a slide groove, and the sides of the two sliders 58 close to each other are connected with arc-shaped flange rods 59, and the bottom of the lifting plate 55 is connected with a pressing block 56, and the two pressing blocks 56 are located between the two arc-shaped flange rods 59, and the sides of the two pressing blocks 56 facing each other are arc-shaped, and the lower part of the lifting frame 52 is connected with a supporting block 57, and the two supporting blocks 57 are respectively located at the lower sides of the two pressing blocks 56, and the top of the supporting block is arc-shaped, so that it can better fit with the inner wall of the shell 11, and the supporting block 57 is provided with a through hole 55 for the arc-shaped flange rod 59 to move up and down. 10. The lifting frame 52 is provided with a driving assembly for driving the lifting plate 55 and the slider 58 to move up and down. The driving assembly includes a screw rod Ⅰ511 rotatably connected to the upper part of the lifting frame 52. The screw rod Ⅰ511 is threadedly connected to the lifting plate 55. The lifting frame 52 is rotatably connected with a screw rod Ⅱ512. The screw rod Ⅱ512 is threadedly connected to the slider 58. The upper parts of the screw rods Ⅱ512 and Ⅰ511 are both connected with a spur gear 513. The upper part of the lifting frame 52 is installed with a servo motor 514. The output shaft of the servo motor 514 is connected with a missing gear 515. The missing gear 515 can be rotated to mesh with the spur gear 513. The lower part of the mounting frame 3 is rotatably provided with an electric clamp 6 for clamping the shell 11. The electric clamp 6 is located at the lower side of the lifting frame 52.The electric clamp 6 includes a circular tube 61 rotatably connected to the lower part of the mounting frame 3, an electric push rod 62 is installed in the circular tube 61, a movable disc 63 is connected to the telescopic rod of the electric push rod 62, and a fixed disc 64 is connected to the end of the circular tube 61 away from the mounting frame 3 on the same side, and four sliding rods that can move left and right are slidably connected to the fixed disc 64 along the circumferential direction. The sliding rods are fixedly connected to the movable disc 63 to guide the movable disc 63. The front and rear sides of the movable disc 63 are rotatably connected to the clamping arms 66 through the rotating shaft 65. The clamping part of the clamping arms 66 is arc-shaped, so that it can better fit with the inner wall of the shell 11. The upper and lower sides of the rotating shaft 65 are connected to the column gears 67, and the front and rear sides of the fixed disc 64 are symmetrically connected to the racks 68. The racks 68 Meshing with the column gear 67, a rotating mechanism for driving the round tube 61 to rotate is provided on the inner wall of the rear side of the casing 1, and the rotating mechanism includes a double-axis drive motor 71 installed on the inner wall of the rear side of the casing 1, and the double-axis drive motor 71 is located below the double-axis screw motor 4. Spline shafts 72 are connected to the output shafts on both sides of the double-axis drive motor 71, and the spline shaft 72 is rotatably connected to the casing 1. Spline sleeves 73 are slidably sleeved on the spline shaft 72, and the two spline sleeves 73 are rotatably connected to the two mounting frames 3 respectively. The two spline sleeves 73 are respectively connected to the two round tubes 61 through a belt transmission assembly 74. The belt transmission assembly 74 consists of two pulleys and a belt. The two pulleys are respectively connected to the spline sleeve 73 and the outer wall of the round tube 61, and the belt sleeve is between the two pulleys.

[0028] The lifting frame 52 is pulled up to move the contact rod 53 upward, and the spring I54 is compressed accordingly. Then, the cylindrical silencer shell 11 can be placed on the lower stamping die 23, and the lifting frame 52 is released. Under the reset action of the spring I54, the lifting frame 52 can drive the contact rod 53 to move downward and tightly fit the outer wall of the shell 11; the telescopic rod of the upper hydraulic cylinder 22 is controlled to extend, so as to push the upper stamping die 23 downward to cooperate with the lower stamping die 23, so as to stamp the cylindrical silencer shell 11 into an elliptical silencer shell 11, and then the telescopic rod of the upper hydraulic cylinder 22 is controlled to retract, so as to pull the upper stamping die 23 to move upward to avoid the mounting frame 3. By controlling the double-axis screw motor 4 to rotate, the two mounting frames 3 can be brought closer to each other, so that the contact rod 53, the pressure block 56, the support block 57 and the arc flanging rod 59 on the left and right sides are brought closer to each other, and the support block 57 is then moved into the shell 11 and fits against the inner wall of the shell 11, and the arc flanging rod 59 is then extended into the shell 11; the two mounting frames 3 are brought closer to each other and drive the two electric clamps 6 to approach each other, so that the clamping arms 66 on the electric clamps 6 extend into the shell 11, and the telescopic rods of the two electric push rods 62 are controlled to extend to push the two movable discs 63 to approach each other, so that the rotating shafts 65, the clamping arms 66 and the column gear 67 on the left and right sides are brought closer to each other, and under the push of the rack 68, the column gear 67 drives the rotating shaft 65 to rotate, so that the clamping arms 66 on the front and rear sides are opened outward and fit against the inner wall of the shell 11, thereby positioning and supporting the shell 11. After the clamp arms 66 on the left and right sides approach each other and open to fit tightly against the inner wall of the shell 11, the arc-shaped clamping part of the clamp arms 66 that fit tightly against the inner wall of the shell 11 is located between the two support blocks 57, avoiding collision between the clamp arms 66 and the support blocks 57 when the subsequent clamp arms 66 drive the shell 11 to rotate, ensuring that the subsequent clamp arms 66 drive the shell 11 to rotate smoothly. If the muffler shell 11 that needs to be flanging is cylindrical, the lower stamping die 23 is kept supporting the cylindrical shell 11. If the shell 11 that needs to be flanging is a shell 11 stamped into an elliptical cylinder, the telescopic rod of the lower hydraulic cylinder 22 is controlled to be shortened to pull the lower stamping die 23 downward to enter the support 10 and disengage from the elliptical cylindrical shell 11 to avoid hindering the subsequent rotation of the elliptical cylindrical shell 11.The servo motor 514 is controlled to work to drive the missing gear 515 to rotate. The missing gear 515 first meshes with the spur gear 513 on the screw rod I 511, thereby driving the screw rod I 511 to rotate so that the lifting plate 55 drives the pressing block 56 to move down and fit the outer wall of the shell 11. The inner wall of the shell 11 can be supported by the supporting block 57 to prevent the pressing block 56 from pressing down and deforming the shell 11. When the missing gear 515 rotates to disengage from the spur gear 513 on the screw rod I 511, the missing gear 515 It then rotates until it engages with the spur gear 513 on the screw rod II 512, thereby driving the screw rod II 512 to rotate so that the slider 58 drives the arc-shaped flanging rod 59 to move upward. At the same time, the dual-axis drive motor 71 is controlled to drive the spline shaft 72 to drive the spline sleeve 73 to rotate, thereby driving the round tube 61 to rotate through the belt drive assembly 74, and then the entire electric clamp 6 rotates to drive the shell 11 to rotate. When the shell 11 rotates, the arc-shaped flanging rod 59 moves upward to complete the flanging of the shell 11. The pressing block 56 can not only press the shell 11 to avoid the arc-shaped flanging rod 59 pulling the shell 11 upward when moving up to flanging, affecting the quality and accuracy of the flanging, but also position the flanging length of the shell 11 to improve the quality and accuracy of the flanging; and when the elliptical cylindrical shell 11 rotates, the spring I54 can be used to make the contact rod 53 always keep in contact with the outer wall of the elliptical cylindrical shell 11, so that the pressing block 56 can always keep in contact with the outer wall of the elliptical cylindrical shell 11, so that the support block 57 can always keep in contact with the inner wall of the elliptical cylindrical shell 11, and the arc-shaped flanging rod 59 can always keep in contact with the inner wall of the elliptical cylindrical shell 11 for precise flanging operation, avoiding misalignment or deformation during the flanging process. In this way, the device can adapt to the shape of the shell 11, achieving the effect of not only being able to flanging the cylindrical shell 11, but also being able to flanging the elliptical cylindrical shell 11.After the flanging work is completed, the telescopic rods of the two electric push rods 62 are controlled to shorten to pull the two movable discs 63 away from each other, so that the rotating shafts 65, the clamping arms 66 and the column gear 67 on the left and right sides are away from each other. Under the push of the rack 68, the column gear 67 drives the rotating shaft 65 to reverse, so that the clamping arms 66 on the front and rear sides are closed inward to loosen the housing 11; then the servo motor 514 is controlled to drive the missing gear 515 to reverse, and the missing gear 515 reverses and first meshes with the spur gear 513 on the screw rod II 512, thereby driving the screw rod II 512 to reverse so that the slider 58 drives the arc flanging rod 59 to move down and reset. When the missing gear 515 reverses to disengage from the spur gear 513 on the screw rod II 512, the missing gear 515 then reverses to engage with the spur gear 513 on the screw rod I 511, thereby driving the screw rod I 511 to reverse so that the lifting plate 55 drives the pressure block 56 to move up and disengage from the outer wall of the shell 11, and then the double-axis screw motor 4 is controlled to reverse so that the two mounting frames 3 move away from each other to move the support block 57 out of the shell 11. When the support block 57 is moved out of the shell 11, the lifting frame 52 is immediately pulled up to make the contact rod 53 move up and disengage from the outer wall of the shell 11, so as to avoid the contact rod 53 pushing the folding part on the shell 11 to deform.

[0029] See also Figure 4 A grinding wheel 8 is obliquely installed on the side of the two pressing blocks 56 that are away from each other. After the shell 11 is flanging, the grinding wheel 8 is in close contact with the flanging arc on the shell 11, so that when the shell 11 rotates, the grinding wheel 8 can grind the flanging arc on the shell 11 to remove burrs or sharp edges on the flanging arc, thereby improving the surface quality of the flanging arc and further improving the aesthetics of the shell 11.

[0030] See also Figure 7 A cleaning mechanism for cleaning grinding debris is provided on the rear side of the casing 1, and the cleaning mechanism includes two left and right slide bars Ⅱ91 which are slidably connected to the rear wall of the casing 1 and can move forward and backward. The slide bar Ⅱ91 is located below the spline shaft 72, and a brush 92 is connected to the front end of the slide bar Ⅱ91. The brush 92 is located in the casing 1 and below the spline shaft 72. A spring Ⅱ93 is sleeved on the slide bar Ⅱ91, and the spring Ⅱ93 abuts against the brush 92 and the casing 1.

[0031] Spring II 93 can keep the brush 92 in close contact with the flange arc on the shell 11, so that when the shell 11 rotates, the brush 92 can clean up the grinding debris adhering to the flange arc, thereby improving the appearance quality of the flange arc and further improving the appearance quality of the shell 11.

[0032] The above-mentioned embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those skilled in the art, several modifications, improvements and substitutions can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

Claims

1. A muffler housing stamping and flanging device, comprising a support (10), the top of the support (10) being connected to a housing (1), the top, bottom and front side of the housing (1) being open, a stamping mechanism for stamping a cylindrical housing (11) into an elliptical cylindrical housing (11) being provided on the housing (1), the stamping mechanism comprising a fixing frame (21), a hydraulic cylinder (22) and a stamping die (23), the top of the housing (1) and the inside of the support (10) being connected to the fixing frame (21) A hydraulic cylinder (22) is mounted on the fixed frame (21), a stamping die (23) is mounted on the telescopic rod of the hydraulic cylinder (22), the stamping die (23) on the lower side is slidably matched with the top of the support (10), two left and right mounting frames (3) that can approach each other are provided on the rear inner wall of the casing (1), a double-axis screw motor (4) is provided on the rear inner wall of the casing (1), and two screws on the double-axis screw motor (4) are respectively threadedly connected to the two mounting frames (3), characterized in that, The mounting frame (3) is provided with a flanging mechanism, which comprises a lifting frame (52) slidably connected to the mounting frame (3) via a sliding rod I (51), a spring I (54) being connected between the lifting frame (52) and the mounting frame (3), a lifting plate (55) being provided on the side where the two lifting frames (52) are close to each other, a contact rod (53) being connected on the side where the two lifting frames (52) are close to each other, the two contact rods (53) being located between the two lifting plates (55), a sliding block (58) being movable up and down being provided on the lifting frame (52), and an arc-shaped flanging block being connected to the sliding block (58). The side rod (59) and the bottom of the lifting plate (55) are connected with a pressure block (56), the two pressure blocks (56) are located between the two arc-shaped flange rods (59), and the two pressure blocks (56) are arc-shaped on the sides facing each other. The lifting frame (52) is provided with a driving component for driving the lifting plate (55) and the slider (58) to move up and down. The lower part of the mounting frame (3) is rotatably provided with an electric clamp (6) for clamping the shell (11), and the electric clamp (6) is located on the lower side of the lifting frame (52). A rotating mechanism for driving the electric clamp (6) to rotate is provided on the inner wall of the rear side of the casing (1); The flanging mechanism further comprises support blocks (57) respectively connected to the lower parts of the two lifting frames (52), the two support blocks (57) being respectively located at the lower sides of the two pressing blocks (56), and a through hole (510) for the arc-shaped flanging rod (59) to move up and down is formed on the support blocks (57); The driving assembly comprises a screw rod I (511) rotatably connected to the upper part of the lifting frame (52), the screw rod I (511) being threadedly connected to the lifting plate (55), a screw rod II (512) being rotatably connected to the lifting frame (52), the screw rod II (512) being threadedly connected to the slider (58), the upper parts of the screw rod II (512) and the screw rod I (511) being connected to a spur gear (513), a servo motor (514) being installed on the upper part of the lifting frame (52), a missing gear (515) being connected to the output shaft of the servo motor (514), and the missing gear (515) being rotatable and meshing with the spur gear (513); The electric clamp (6) comprises a circular tube (61) rotatably connected to the lower part of the mounting frame (3), an electric push rod (62) is installed in the circular tube (61), a movable disc (63) is connected to the telescopic rod of the electric push rod (62), an end of the circular tube (61) away from the mounting frame (3) on the same side is connected to a fixed disc (64), front and rear sides of the movable disc (63) are rotatably connected to clamp arms (66) via a rotating shaft (65), a column gear (67) is connected to the rotating shaft (65), and racks (68) are connected to the front and rear sides of the fixed disc (64), and the racks (68) and the column gear (67) are meshed.

2. A muffler housing stamping and flanging device according to claim 1, characterized in that: The rotating mechanism comprises a double-shaft drive motor (71) mounted on the inner wall of the rear side of the casing (1), the double-shaft drive motor (71) being located below the double-shaft screw motor (4), spline shafts (72) being connected to both side output shafts of the double-shaft drive motor (71), the spline shafts (72) being rotationally connected to the casing (1), a spline sleeve (73) being sleeved on the spline shaft (72), the two spline sleeves (73) being rotationally connected to the two mounting frames (3), and the two spline sleeves (73) being transmission-connected to the two round tubes (61) via belt transmission assemblies (74).

3. A muffler housing stamping and flanging device according to claim 1, characterized in that: Grinding wheels (8) are obliquely mounted on the sides of the two pressing blocks (56) that are away from each other.

4. A muffler housing stamping and flanging device according to claim 3, characterized in that: A cleaning mechanism for cleaning grinding debris is provided on the rear side of the casing (1), the cleaning mechanism comprising two left and right brushes (92) which are slidably connected to the casing (1) via a slide bar II (91) and are movable forward and backward; the brushes (92) are located inside the casing (1) and below the spline shaft (72); a spring II (93) is connected between the brushes (92) and the casing (1).

5. The muffler housing stamping and flanging device according to claim 1, characterized in that: The top of the support block (57) and the clamping portion of the clamping arm (66) are both arc-shaped.

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