Stamping die for automobile silencer cylinder bulging

Abstract

The invention relates to the technical field of stamping dies, in particular to a stamping die for automobile silencer barrel bulging, which comprises a base and a die taking and placing assembly, the mold taking and placing assembly comprises a control panel, a transverse moving unit, a supporting plate, a sealing gasket, a fixed mold, a rotating mold, a rotating unit, a first convex block, a second convex block, a first threaded rod, a threaded cylinder, a telescopic rod, a first motor and a first motor supporting piece, the control panel is fixedly connected with the base, the first motor is started, the threaded cylinder is driven to rotate through the telescopic rod, and the first motor is driven to rotate; after the first threaded rod and the threaded cylinder are removed, the threaded cylinder gradually moves towards the first threaded rod, meanwhile, the telescopic rod extends out, finally, the threaded cylinder abuts against the first protruding block, and the second protruding block is fixed to the first protruding block, so that manual operation of opening and closing of the mold is not needed, and meanwhile, manual operation of putting the automobile silencer cylinder into the mold is not needed. The labor intensity of workers is reduced, and the stamping efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of stamping dies, in particular to a stamping die for bulging a cylinder of an automobile muffler. Background Art

[0002] In the processing of the cylinder of the automobile muffler, the cylinder needs to be expanded. The traditional operation is to put the cylinder into a die and then use a punch to drive the punch to perform stamping and expansion. However, this method cannot stamp both ends of the cylinder at the same time, so it is necessary to repeat the stamping twice, which is very inconvenient.

[0003] In the prior art, sleeve molds are respectively provided at both ends of the workpiece, and a father inclined surface is provided at one end of the transmission rod, and an inclined plate is provided at the bottom end of the second inclined surface. When the telescopic rod is contracted, the inclined plate is moved upward so that the first inclined surface and the second inclined surface are in contact with each other. The second inclined surface is subjected to force from the first inclined surface, so that the transmission rod drives the sleeve mold to expand the workpiece, thereby completing double-sided processing at the same time. In addition, Benzhuang has a T-shaped slide groove on the table top, and the screw is rotated by a turntable so that the front plate can slide along the T-shaped slide groove on the table top, thereby tightening the front plate and the rear plate to each other, so that the workpiece is more secure during processing.

[0004] However, in the above-mentioned prior art, it is very inconvenient to take and place the cylinder, and it is necessary to manually disassemble and assemble the limiting parts of the mold, and then manually take and place the cylinder, which affects the stamping efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a stamping die for expanding the cylinder of an automobile muffler, which solves the problem in the prior art that it is very inconvenient to take and place the cylinder, and that the limiting parts of the die need to be manually disassembled and assembled, and then the cylinder needs to be manually taken and placed, which affects the stamping efficiency.

[0006] To achieve the above-mentioned purpose, the present invention provides a stamping die for bulging a cylinder of an automobile muffler, comprising a base and a pick-and-place die assembly;

[0007] The pick-and-place mold assembly includes a control panel, a transverse moving unit, a support plate, a sealing gasket, a fixed mold, a rotating mold, a rotating unit, a first protrusion, a second protrusion, a first threaded rod, a threaded cylinder, a telescopic rod, a first motor and a first motor support. The control panel is fixedly connected to the base and is located on one side of the base. The transverse moving unit is arranged on the base. The base has a slide groove. The support plate is slidably connected to the slide groove. The sealing gasket is fixedly connected to the support plate and is located above the support plate. The fixed mold is fixedly connected to the base. The rotating mold is connected to one end of the fixed mold through the rotating unit. Rotational connection, the first protrusion is fixedly connected to one end of the fixed mold away from the rotating unit, the second protrusion is fixedly connected to one end of the rotating mold away from the rotating unit, the first threaded rod is fixedly connected to the second protrusion, the first protrusion has a through hole, the first motor support is fixedly connected to the fixed mold and is located outside the fixed mold, the first motor is arranged above the first motor support, the output end of the first motor is fixedly connected to one end of the telescopic rod, the other end of the telescopic rod is fixedly connected to the threaded barrel, the first threaded rod passes through the through hole, and is adapted to the threaded barrel.

[0008] Among them, the lateral movement unit includes a second motor and a second threaded rod, the second motor is fixedly connected to the base and is located at one end of the base, one end of the second threaded rod is fixedly connected to the output end of the second motor, the other end of the second threaded rod passes through the base and is rotatably connected to the inner wall of the slide groove, and the support plate has a threaded hole, and the threaded hole and the second threaded rod are adapted to each other.

[0009] Wherein, the rotating unit includes two fixed blocks and a rotating block, the two fixed blocks are fixedly connected to the fixed mold, the rotating block is fixedly connected to the rotating mold, the two fixed blocks are respectively located at two ends of the rotating block, and the two ends of the rotating block are respectively rotatably connected to the corresponding fixed blocks.

[0010] Among them, the rotating unit includes a third motor, a driving shaft, a first gear, a second gear and a rotating shaft. The third motor is fixedly connected to the base and is located below the base. Both ends of the driving shaft are fixedly connected to the output end of the third motor and the first gear respectively. The second gear is meshed with the first gear. One end of the rotating shaft is fixedly connected to the second gear. The other end of the rotating shaft passes through the base and the corresponding fixed block, and is fixedly connected to the rotating block.

[0011] Wherein, the stamping die for bulging the automobile muffler cylinder also includes a limiting component, and the limiting component is arranged on the fixed die.

[0012] Among them, the limiting assembly includes a first support block, a first cylinder, a limiting block and a first pressure sensor, the first support block is fixedly connected to the fixed mold and is located on the outside of the fixed mold, the first cylinder is arranged on the first support block, the output end of the first cylinder is fixedly connected to the limiting block, the first pressure sensor is fixedly connected to the first support block and is located on one side of the first support block, the rotating block has a limiting groove, and the limiting block and the limiting groove are adapted to each other.

[0013] Among them, the limit assembly also includes a push rod, a frame and a second pressure sensor, one end of the push rod is fixedly connected to the support plate and is located on one side of the support plate, the frame is fixedly connected to the base and is located at the other end of the base, the other end of the push rod passes through the slide groove and is located inside the frame, the second pressure sensor is arranged on the inner side wall of the frame, and the other end of the push rod is in contact with the second pressure sensor.

[0014] The present invention provides a stamping die for bulging a car muffler cylinder. By operating the control panel, the operation of various devices of the stamping die can be controlled. The car muffler cylinder is placed on the support plate, the rotating unit is started, the rotating die is driven to rotate, and the car muffler cylinder is limited by the fixed die to form a complete stamping die. At the same time, the first threaded rod passes through the through hole of the first protrusion, and then the first motor is started to drive the threaded cylinder to rotate through the telescopic rod. After the first threaded rod and the threaded cylinder are released, the threaded cylinder gradually moves toward the first threaded rod. A threaded rod moves, and the telescopic rod extends out with it, and finally the threaded cylinder abuts against the first protrusion, and the second protrusion is fixed on the first protrusion. At this time, bulging stamping can be performed. After the end, the rotating mold is opened, and the lateral moving unit is started to drive the support plate to move out from under the fixed mold, and the stamped automobile muffler cylinder is moved out. Through the above-mentioned structural setting, when taking and placing the automobile muffler cylinder, there is no need to manually operate the opening and closing of the mold, and there is no need to manually put the automobile muffler cylinder into the mold, which reduces the labor intensity and improves the stamping efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0016] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present invention.

[0017] Figure 2 It is an overall cross-sectional view of the first embodiment of the present invention.

[0018] Figure 3 is a cross-sectional view of the rotating unit of the present invention.

[0019] Figure 4 It is a schematic diagram of the overall structure of the second embodiment of the present invention.

[0020] Figure 5 It is a structural schematic diagram of the opening of the rotary mold of the present invention.

[0021] Figure 6 is a cross-sectional view of a push rod according to a second embodiment of the present invention.

[0022] Figure 7 The present invention Figure 4 A magnified view of the local structure at A.

[0023] Figure 8 It is a schematic diagram of the overall structure of the third embodiment of the present invention.

[0024] Fig. 9 It is an overall cross-sectional view of a third embodiment of the present invention.

[0025] 101-base, 102-control panel, 103-support plate, 104-sealing pad, 105-fixed mold, 106-rotating mold, 107-first protrusion, 108-second protrusion, 109-first threaded rod, 110-threaded cylinder, 111-telescopic rod, 112-first motor, 113-first motor support, 114-slide, 115-through hole, 116-second motor, 117-second threaded rod, 118-threaded hole, 119-fixed Fixed block, 120-rotating block, 121-third motor, 122-driving shaft, 123-first gear, 124-second gear, 125-rotating shaft, 201-first supporting block, 202-first cylinder, 203-limiting block, 204-first pressure sensor, 205-limiting groove, 206-top rod, 207-frame, 208-second pressure sensor, 301-second supporting block, 302-second cylinder, 303-moving plate, 304-knocking rubber block. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0027] First embodiment:

[0028] See also Figures 1 to 3The present invention provides a stamping die for bulging a cylinder of an automobile muffler, comprising a base 101 and a pick-and-place die assembly, wherein the pick-and-place die assembly comprises a control panel 102, a lateral movement unit, a support plate 103, a sealing gasket 104, a fixed die 105, a rotating die 106, a rotating unit, a first protrusion 107, a second protrusion 108, a first threaded rod 109, a threaded barrel 110, a telescopic rod 111, a first motor 112 and a first motor support 113, wherein the base 101 has a slide groove 114, the lateral movement unit comprises a second motor 116 and a second threaded rod 117, the rotating unit comprises two fixed blocks 119 and a rotating block 120, and the rotating unit comprises a third motor 121, a driving shaft 122, a first gear 123, a second gear 124 and a rotating shaft 125.

[0029] According to this specific embodiment, the third motor 121 is started to drive the drive shaft 122 to rotate, so that the first gear 123 rotates, and through the meshing with the second gear 124, the second gear 124 and the drive shaft 122 are driven to rotate, and then the rotating block 120 is driven to rotate, so that the rotating mold 106 is closed, and the automobile muffler cylinder is limited in position in cooperation with the fixed mold 105 to form a complete stamping mold, and at the same time, the first threaded rod 109 passes through the through hole 115 of the first protrusion 107, and then the first motor 112 is started to drive the threaded barrel 110 to rotate through the telescopic rod 111, and after the first threaded rod 109 and the threaded barrel 110 are released, the threaded barrel 110 gradually moves toward the first threaded rod 109, and the telescopic rod 111 extends out, and finally the threaded barrel 110 is abutted against the first protrusion 107, and the second protrusion 108 is fixed on the first protrusion 107, and then the bulging stamping can be performed.

[0030] The control panel 102 is fixedly connected to the base 101 and is located on one side of the base 101. The lateral moving unit is arranged on the base 101. The base 101 has a slide groove 114. The support plate 103 is slidably connected to the slide groove 114. The sealing gasket 104 is fixedly connected to the support plate 103 and is located above the support plate 103. The fixed mold 105 is fixedly connected to the base 101. The rotating mold 106 is rotatably connected to one end of the fixed mold 105 through the rotating unit. The first protrusion 107 is fixedly connected to one end of the fixed mold 105 away from the rotating unit. The second protrusion 107 is fixedly connected to the end of the fixed mold 105 away from the rotating unit. 08 is fixedly connected to one end of the rotating mold 106 away from the rotating unit, the first threaded rod 109 is fixedly connected to the second protrusion 108, the first protrusion 107 has a through hole 115, the first motor support 113 is fixedly connected to the fixed mold 105 and is located outside the fixed mold 105, the first motor 112 is arranged above the first motor support 113, the output end of the first motor 112 is fixedly connected to one end of the telescopic rod 111, the other end of the telescopic rod 111 is fixedly connected to the threaded barrel 110, the first threaded rod 109 passes through the through hole 115, and is adapted to the threaded barrel 110. By operating the control panel 102, the operation of each device of the stamping die can be controlled. By placing the automobile muffler barrel on the support plate 103, starting the rotating unit, driving the rotating die 106 to rotate, and cooperating with the fixed die 105 to limit the automobile muffler barrel, a complete stamping die is formed. At the same time, the first threaded rod 109 passes through the through hole 115 of the first protrusion 107, and then the first motor 112 is started, and the threaded barrel 110 is driven to rotate through the telescopic rod 111. After the first threaded rod 109 and the threaded barrel 110 are released, the threaded barrel 110 gradually moves toward the first threaded rod 109. At the same time, the telescopic rod 111 extends out, and finally the threaded barrel 110 abuts against the first protrusion 107, and the second protrusion 108 is fixed on the first protrusion 107. At this time, the bulging stamping can be performed. After the end, the rotating mold 106 is opened, and the lateral moving unit is started to drive the support plate 103 to move out from under the fixed mold 105, and the stamped automobile muffler barrel is moved out. In addition, a spring is arranged inside the telescopic rod 111 to enable it to have a rebound and reset function. After the rotating mold 106 is opened, the telescopic rod 111 can be reset to ensure that the threaded barrel 110 can repeatedly contact the first threaded rod 109.

[0031] Secondly, the second motor 116 is fixedly connected to the base 101 and is located at one end of the base 101. One end of the second threaded rod 117 is fixedly connected to the output end of the second motor 116. The other end of the second threaded rod 117 penetrates the base 101 and is rotatably connected to the inner wall of the slide slot 114. The support plate 103 has a threaded hole 118, and the threaded hole 118 and the second threaded rod 117 are mutually adapted. When the second motor 116 is started, the second threaded rod 117 is driven to rotate and cooperate with the threaded hole 118, driving the support plate 103 to slide in the slide slot 114.

[0032] At the same time, the two fixed blocks 119 are fixedly connected to the fixed mold 105, and the rotating block 120 is fixedly connected to the rotating mold 106. The two fixed blocks 119 are respectively located at both ends of the rotating block 120, and the two ends of the rotating block 120 are respectively rotatably connected to the corresponding fixed blocks 119. The rotating block 120 rotates on the fixed block 119, thereby causing the rotating mold 106 to rotate.

[0033] In addition, the third motor 121 is fixedly connected to the base 101 and is located below the base 101. The two ends of the driving shaft 122 are fixedly connected to the output end of the third motor 121 and the first gear 123 respectively. The second gear 124 is meshed with the first gear 123. One end of the rotating shaft 125 is fixedly connected to the second gear 124. The other end of the rotating shaft 125 passes through the base 101 and the corresponding fixed block 119 and is fixedly connected to the rotating block 120. When the third motor 121 is started, it drives the driving shaft 122 to rotate, so that the first gear 123 rotates. By meshing with the second gear 124, the second gear 124 and the driving shaft 122 are driven to rotate, and then the rotating block 120 is driven to rotate, so that the rotating mold 106 is opened.

[0034] When using a stamping die for bulging a car muffler cylinder of the present embodiment, the car muffler cylinder is placed on the support plate 103, the third motor 121 is started, driving the drive shaft 122 to rotate, causing the first gear 123 to rotate, and through engagement with the second gear 124, driving the second gear 124 and the drive shaft 122 to rotate, thereby driving the rotating block 120 to rotate, so that the rotating die 106 is closed, and the car muffler cylinder is limited in position with the fixed die 105 to form a complete stamping die, and at the same time, the first threaded rod 109 passes through the through hole 115 of the first protrusion 107, and then the first motor 112 is started, driving the threaded cylinder 110 to rotate through the telescopic rod 111, and the first threaded rod 109 and the threaded cylinder After 110 is released, the threaded barrel 110 gradually moves toward the first threaded rod 109, and the telescopic rod 111 follows and extends out. Finally, the threaded barrel 110 abuts against the first protrusion 107, and the second protrusion 108 is fixed on the first protrusion 107. At this time, bulging stamping can be performed. After completion, the rotating mold 106 is opened, and the second motor 116 is started to drive the second threaded rod 117 to rotate, cooperate with the threaded hole 118, and drive the support plate 103 to slide in the slide groove 114 to move out the stamped automobile muffler cylinder. Through the above-mentioned structural arrangement, when taking and placing the automobile muffler cylinder, there is no need to manually operate the opening and closing of the mold, and there is no need to manually put the automobile muffler cylinder into the mold, which reduces the labor intensity and improves the stamping efficiency.

[0035] Second embodiment:

[0036] Based on the first embodiment, please refer to Figures 4 to 7 The present invention provides a stamping die for bulging the cylinder of an automobile muffler, which also includes a limiting component, wherein the limiting component includes a first support block 201, a first cylinder 202, a limiting block 203, a first pressure sensor 204, a push rod 206, a frame 207 and a second pressure sensor 208.

[0037] The limiting assembly is arranged on the fixed mold 105. The limiting assembly can limit and fix the rotating mold 106 after it is rotated and opened, so as to prevent the automobile muffler cylinder from being disturbed by the rotating mold 106 that is rotated incorrectly during the process of taking out and putting in.

[0038] Secondly, the first support block 201 is fixedly connected to the fixed mold 105 and is located outside the fixed mold 105. The first cylinder 202 is arranged on the first support block 201. The output end of the first cylinder 202 is fixedly connected to the limit block 203. The first pressure sensor 204 is fixedly connected to the first support block 201 and is located on one side of the first support block 201. The rotating block 120 has a limit groove 205, and the limit block 203 and the limit groove 205 are adapted to each other. The first support block 201 supports the first cylinder 202. When the rotating mold 106 is rotated and opened, the rotating block 120 contacts the first pressure sensor 204. Then, after the control panel 102 recognizes the pressure information, the first cylinder 202 is started to drive the limit block 203 to move down and enter the limit groove 205, so as to limit the rotating block 120, so that the rotating mold 106 cannot rotate.

[0039] At the same time, one end of the push rod 206 is fixedly connected to the support plate 103 and is located on one side of the support plate 103. The frame 207 is fixedly connected to the base 101 and is located at the other end of the base 101. The other end of the push rod 206 passes through the slide groove 114 and is located inside the frame 207. The second pressure sensor 208 is arranged on the inner wall of the frame 207, and the other end of the push rod 206 is in contact with the second pressure sensor 208. At the same time, when the support block is located below the fixed mold 105, one end of the push rod 206 contacts the second pressure sensor 208. At this time, the control panel 102 can read the information of the second pressure sensor 208 to know that the support plate 103 is located below the fixed mold 105. When the rotating mold 106 is opened, the support plate 103 moves out, and then the push rod 206 does not contact the second pressure sensor 208, and the pressure value of the second pressure sensor 208 returns to zero. Then, after the staff takes away the bulged cylinder and puts a new cylinder, the support plate 103 returns to the bottom of the fixed mold 105 under the drive of the lateral moving unit. At this time, the push rod 206 re-monitors the value change of the second pressure sensor 208, indicating that the support plate 103 is already located below the fixed mold 105, and a control instruction can be issued to start the first cylinder 202, and the limit block 203 is separated from the limit groove 205, and then the rotating unit is started to drive the rotating mold 106 to rotate.

[0040] When using a stamping die for automobile muffler cylinder bulging of the present embodiment, after the rotating die 106 is rotated and opened, the rotating block 120 contacts the first pressure sensor 204, and then after the control panel 102 recognizes the pressure information, the first cylinder 202 is started to drive the limit block 203 to move downward and enter the limit groove 205, so as to limit the rotating block 120 so that the rotating die 106 cannot rotate. At the same time, when the support block is located below the fixed die 105, one end of the push rod 206 contacts the second pressure sensor 208. At this time, the control panel 102 can read the information of the second pressure sensor 208 to know that the support plate 103 is located below the fixed die 105. When the rotating die 106 is opened, the support plate 103 moves out, and then the push rod 206 does not The second pressure sensor 208 is contacted, and the pressure value of the second pressure sensor 208 is reset to zero. After the staff takes away the expanded cylinder and puts a new cylinder, the support plate 103 is driven by the lateral moving unit to return to the bottom of the fixed mold 105. At this time, the push rod 206 re-monitors the value change of the second pressure sensor 208, which means that the support plate 103 is already located under the fixed mold 105. A control instruction can be issued to start the first cylinder 202, and the limit block 203 is disengaged from the limit groove 205. Then, the rotating unit is started to drive the rotating mold 106 to rotate. Through the above-mentioned structural setting, the rotating mold 106 is limited and fixed after being rotated and opened, so as to avoid the automobile muffler cylinder being disturbed by the rotating mold 106 that is rotated by mistake during the process of taking out and putting in.

[0041] Third embodiment:

[0042] The stamping die for the automobile muffler cylinder bulging also includes two knocking assemblies, which are respectively arranged on the fixed mold 105 and the rotating mold 106. The knocking assembly includes a second support block 301, a second cylinder 302, a movable plate 303 and a plurality of knocking rubber blocks 304, wherein the second support block 301 is fixedly connected to the fixed mold 105 and is located outside the fixed mold 105, the second cylinder 302 is fixedly connected to the second support block 301 and is located above the second support block 301, the output end of the second cylinder 302 is fixedly connected to the movable plate 303, and the plurality of knocking rubber blocks 304 are all fixedly connected to the movable plate 303 and are sequentially distributed on one side of the movable plate 303.

[0043] Based on the second embodiment, please refer to Figure 8 and Fig. 9The present invention provides a stamping die for bulging a cylinder of an automobile muffler, which also includes two knocking components. The knocking components include a second supporting block 301, a second cylinder 302, a moving plate 303 and a plurality of knocking rubber blocks 304.

[0044] According to this specific embodiment, when the punching machine finishes punching, when the punching head moves up, the bulged cylinder may be driven to move upward. At this time, the second cylinder 302 is started, driving the movable plate 303 to move, so that the multiple knocking rubber blocks 304 quickly and continuously knock on the automobile muffler cylinder. The knocking rubber blocks 304 are made of elastic rubber, which can avoid scratching the automobile muffler cylinder.

[0045] The two knocking assemblies are respectively arranged on the fixed mold 105 and the rotating mold 106. The knocking assembly can quickly knock the automobile muffler cylinder adhered to the punching machine to make it fall and return to the support plate 103.

[0046] Secondly, the second support block 301 is fixedly connected to the fixed mold 105 and is located outside the fixed mold 105. The second cylinder 302 is fixedly connected to the second support block 301 and is located above the second support block 301. The output end of the second cylinder 302 is fixedly connected to the moving plate 303. The plurality of knocking rubber blocks 304 are all fixedly connected to the moving plate 303 and are sequentially distributed on one side of the moving plate 303. The second support block 301 supports the second cylinder 302. The second cylinder 302 is started to drive the moving plate 303 to move, so that the plurality of knocking rubber blocks 304 quickly and continuously knock on the automobile muffler cylinder. The knocking rubber blocks 304 are made of elastic rubber to avoid scratching the automobile muffler cylinder.

[0047] When using a stamping die for bulging the cylinder of an automobile muffler according to the present embodiment, after the stamping of the stamping machine is completed, when the stamping head moves up, the bulged cylinder may be driven to move upward, and at this time the second cylinder 302 is started to drive the moving plate 303 to move, so that the plurality of knocking rubber blocks 304 quickly and continuously knock on the cylinder of the automobile muffler. The knocking rubber blocks 304 are made of elastic rubber to avoid scratching the cylinder of the automobile muffler. Through the above-mentioned structural setting, the cylinder of the automobile muffler stuck on the stamping machine can be quickly knocked to make it fall and return to the support plate 103.

[0048] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A stamping die for bulging the cylinder of an automobile muffler, comprising a base, characterized in that: Also included is a pick-and-place mold assembly; The pick-and-place mold assembly includes a control panel, a transverse moving unit, a support plate, a sealing gasket, a fixed mold, a rotating mold, a rotating unit, a first protrusion, a second protrusion, a first threaded rod, a threaded cylinder, a telescopic rod, a first motor and a first motor support. The control panel is fixedly connected to the base and is located on one side of the base. The transverse moving unit is arranged on the base. The base has a slide groove. The support plate is slidably connected to the slide groove. The sealing gasket is fixedly connected to the support plate and is located above the support plate. The fixed mold is fixedly connected to the base. The rotating mold is connected to one end of the fixed mold through the rotating unit. Rotational connection, the first protrusion is fixedly connected to one end of the fixed mold away from the rotating unit, the second protrusion is fixedly connected to one end of the rotating mold away from the rotating unit, the first threaded rod is fixedly connected to the second protrusion, the first protrusion has a through hole, the first motor support is fixedly connected to the fixed mold and is located outside the fixed mold, the first motor is arranged above the first motor support, the output end of the first motor is fixedly connected to one end of the telescopic rod, the other end of the telescopic rod is fixedly connected to the threaded barrel, the first threaded rod passes through the through hole, and is adapted to the threaded barrel.

2. The stamping die for bulging the cylinder of an automobile muffler according to claim 1, characterized in that: The lateral movement unit includes a second motor and a second threaded rod, the second motor is fixedly connected to the base and is located at one end of the base, one end of the second threaded rod is fixedly connected to the output end of the second motor, the other end of the second threaded rod passes through the base and is rotatably connected to the inner wall of the slide groove, and the support plate has a threaded hole, which is adapted to the second threaded rod.

3. The stamping die for bulging the automobile muffler cylinder as claimed in claim 2, characterized in that: The rotating unit includes two fixed blocks and a rotating block. The two fixed blocks are fixedly connected to the fixed mold, and the rotating block is fixedly connected to the rotating mold. The two fixed blocks are respectively located at two ends of the rotating block, and the two ends of the rotating block are respectively rotatably connected to the corresponding fixed blocks.

4. The stamping die for bulging the cylinder of an automobile muffler as claimed in claim 3, characterized in that: The rotating unit includes a third motor, a driving shaft, a first gear, a second gear and a rotating shaft. The third motor is fixedly connected to the base and is located below the base. Both ends of the driving shaft are fixedly connected to the output end of the third motor and the first gear respectively. The second gear is meshed with the first gear. One end of the rotating shaft is fixedly connected to the second gear. The other end of the rotating shaft passes through the base and the corresponding fixed block and is fixedly connected to the rotating block.

5. The stamping die for bulging the automobile muffler cylinder as claimed in claim 4, characterized in that: The stamping die for bulging the automobile muffler cylinder also includes a limiting component, and the limiting component is arranged on the fixed die.

6. The stamping die for bulging the automobile muffler cylinder as claimed in claim 5, characterized in that: The limiting assembly includes a first support block, a first cylinder, a limiting block and a first pressure sensor. The first support block is fixedly connected to the fixed mold and is located on the outside of the fixed mold. The first cylinder is arranged on the first support block. The output end of the first cylinder is fixedly connected to the limiting block. The first pressure sensor is fixedly connected to the first support block and is located on one side of the first support block. The rotating block has a limiting groove, and the limiting block and the limiting groove are adapted to each other.

7. The stamping die for bulging the cylinder of an automobile muffler as claimed in claim 6, characterized in that: The limit assembly also includes a push rod, a frame body and a second pressure sensor, one end of the push rod is fixedly connected to the support plate and is located on one side of the support plate, the frame body is fixedly connected to the base and is located at the other end of the base, the other end of the push rod passes through the slide groove and is located inside the frame body, the second pressure sensor is arranged on the inner side wall of the frame body, and the other end of the push rod is in contact with the second pressure sensor.

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