Punching device for cylindrical workpiece

Abstract

The utility model discloses a punching machining device for a cylindrical workpiece, and relates to the technical field of lighter shell machining, the punching machining device comprises a base, and a workpiece conveying mechanism, a feeding mechanism, a punching mechanism, a loading mechanism and an unloading mechanism which are all arranged on the base; the punching mechanism is provided with a horizontally-arranged positioning female die and a punching die head matched with the positioning female die to work, workpieces conveyed by the workpiece conveying mechanism can fall into a material receiving opening of the feeding mechanism one by one, and after the feeding mechanism conveys the workpieces to the corresponding positions, the workpieces are punched through the punching die head. The feeding mechanism is used for pushing a workpiece to enable the workpiece to be arranged on the positioning female die in a sleeving mode, the positioning female die and the stamping die head generate relative motion to achieve machining of the workpiece, and the machined workpiece is pushed away from the positioning female die through the discharging mechanism to be blanked. The automatic punching device can meet the requirement for continuous and automatic punching machining of the cylindrical workpiece, and is high in production efficiency and simple and compact in structure.

Description

Technical Field

[0001] This application relates to the field of lighter housing processing technology, specifically to a punching processing device for cylindrical workpieces. Background Technology

[0002] In the field of stamping dies, various types of parts are designed with corresponding master dies and slave dies that can move relative to each other to enable mass production. Punching is a common stamping process. When punching the sidewalls of thin-walled cylindrical workpieces, in order to avoid workpiece deformation and scrapping during punching, a core die and fixture are generally used to fix the cylindrical workpiece, and then a stamping die is used for punching. However, existing devices for punching thin-walled shells are basically unsuitable for lighter shells because lighter shells are small and often require irregular shapes. Traditional fixing methods either obstruct the processing of lighter shells or prevent the shell from being fixed, affecting the accuracy of the punching position. Moreover, most devices usually require manual disassembly and replacement of workpieces during operation, which not only makes the operation cumbersome but also prevents continuous production, thus affecting production efficiency. Utility Model Content

[0003] In view of this, this application provides a punching processing device for cylindrical workpieces, which can solve the technical problem of low production efficiency by utilizing the cooperation of a workpiece conveying mechanism, a feeding mechanism, a punching mechanism, a loading mechanism and a unloading mechanism.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A punching device for cylindrical workpieces includes a base, and further includes a workpiece conveying mechanism, a feeding mechanism, a punching mechanism, a loading mechanism, and a unloading mechanism, all mounted on the base. The punching mechanism has a horizontally arranged positioning die and a stamping die that works in conjunction with the positioning die. Workpieces conveyed by the workpiece conveying mechanism fall one by one into the receiving port of the feeding mechanism. After the feeding mechanism delivers the workpiece to the corresponding position, the loading mechanism pushes the workpiece to mount it onto the positioning die. The positioning die and the stamping die move relative to each other to process the workpiece. After processing, the workpiece is pushed away from the positioning die by the unloading mechanism and unloaded.

[0006] Furthermore, the feeding mechanism includes a feeding drive mechanism, an L-shaped receiving seat connected to the feeding drive mechanism, and a swing stop rod rotatably disposed on the receiving seat. The receiving seat is also provided with an elastic element acting on the swing stop rod, and a receiving port is formed between the receiving seat and the swing stop rod.

[0007] Furthermore, the elastic element is an elastic arc plate, one end of which is connected to the receiving seat, and the other end of which abuts against the swing stop rod to reset and tilt the swing stop rod back up.

[0008] Furthermore, the receiving seat is connected to a baffle plate that can prevent the workpiece conveying mechanism from dropping materials.

[0009] Furthermore, the stamping mechanism also includes a floating mold frame that is elastically floating and an upper pressure plate that is elastically floating above the floating mold frame. The stamping die head includes a lower stamping die head mounted on the base and an upper stamping die head mounted on the upper pressure plate. The positioning die is located on the floating mold frame, the lower stamping die head is located below the positioning die head, and the upper pressure plate presses down to complete the stamping operation.

[0010] Furthermore, the punching mechanism also includes at least one guide rod connected to the base and at least one telescopic rod connected between the upper pressure plate and the base. The upper pressure plate is slidably connected to the guide rod, and the floating mold frame slides along the guide rod and the telescopic rod. A second return spring is sleeved on the guide rod and abuts against the bottom of the floating mold frame. Two third return springs are sleeved on the telescopic rod and located at both ends of the floating mold frame, respectively.

[0011] Furthermore, the floating mold frame is also provided with an upper guide seat that slides with the upper stamping die head and a lower guide seat that slides with the lower stamping die head.

[0012] Furthermore, the base is provided with fixing bolts, and the fixing bolts are connected with limit nuts. The limit nuts prevent the floating mold frame from continuing to press down by abutting against the bottom surface of the floating mold frame.

[0013] Furthermore, the unloading mechanism includes a push ring slidably sleeved on the positioning master mold, a movable frame connected to the push ring, and an unloading drive mechanism acting on the movable frame.

[0014] Furthermore, the movable frame includes at least two sliding shafts that pass through the floating mold frame, the push ring is connected to the cantilever end of the sliding shaft, and a fourth return spring sleeved on the sliding shaft drives the movable frame to move closer to the unloading drive mechanism to drive the push ring to retract.

[0015] Furthermore, the feeding mechanism includes a liftable feeding drive mechanism and a push rod connected to the feeding drive mechanism. During the stamping operation, the push rod abuts against the end face of the workpiece and rises and falls synchronously with the floating mold frame.

[0016] Furthermore, the front end of the push rod has an insertion section capable of being inserted into the inner hole of the workpiece.

[0017] Furthermore, the feeding drive mechanism is slidably mounted on the vertical guide rail of the base, and an upward reset elastic element is provided between the feeding drive mechanism and the base. A positioning bolt is connected to the feeding drive mechanism, and the truss fixedly mounted on the upper pressure plate is slidably sleeved on the positioning bolt. An adjusting nut located above the truss is connected to the positioning bolt.

[0018] As can be seen from the above technical solution, the advantages of this utility model are:

[0019] 1. In this application, the workpiece conveying mechanism, feeding mechanism, punching mechanism, loading mechanism and unloading mechanism work together, eliminating the need for manual assistance, enabling continuous processing and improving production efficiency.

[0020] 2. This application utilizes a simple combination of a workpiece conveying mechanism, a feeding mechanism, a punching mechanism, a loading mechanism, and a unloading mechanism. The workpiece is fixed by the cooperation of the positioning die and the loading mechanism, making the fixing method simple and not easily affected by the shape of the workpiece. It also does not affect the side punching of the workpiece. The unloading mechanism enables automatic unloading, realizing automatic continuous punching of thin-walled cylindrical workpieces. Moreover, the structure of this application is simple and compact. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0022] Figure 1 This is a schematic diagram of the structure of this application. Figure 1 .

[0023] Figure 2 This is a schematic diagram of the structure of this application. Figure 2 .

[0024] Figure 3 This is a schematic diagram of the feeding mechanism of this application.

[0025] Figure 4 This is a schematic diagram of the combined structure of the punching mechanism and the feeding mechanism of this application. Figure 1 .

[0026] Figure 5 This is a schematic diagram of the combined structure of the punching mechanism and the feeding mechanism of this application. Figure 2 .

[0027] Figure 6 This is a top view schematic diagram of the combination of the punching mechanism and the feeding mechanism of this application.

[0028] Figure 7 For the purposes of this application Figure 6A schematic diagram of the cross-sectional structure along the AA direction.

[0029] Figure 8 This is a schematic diagram of the internal structure of the punching mechanism of this application.

[0030] Figure 9 This is a schematic diagram of the structure with a vibratory feeder according to this application.

[0031] Explanation of reference numerals in the attached drawings: Base 1, First mounting seat 11, Vertical guide rail 12, Support rod 2, Fixed rod 21, Adjusting rod 22, Strip hole 221, Workpiece conveying mechanism 3, Adjusting hole 31, Feeding mechanism 4, Feeding drive mechanism 41, Receiving seat 42, Baffle plate 43, Swinging stop bar 44, Elastic arc plate 45, Limiting rod 46, Punching mechanism 5, Guide rod 51, Telescopic rod 52, Floating mold frame 53, Positioning female mold 531, Mold hole 5311, Lower guide seat 532, Upper guide seat 533 54. Upper pressure plate, 541. Guide hole, 542. Upper punching die, 543. Truss, 55. Second return spring, 56. Third return spring, 57. Lower punching die, 58. Fixing bolt, 59. Limiting nut, 6. Feeding mechanism, 61. Slide, 62. Feeding drive mechanism, 63. First return spring, 64. Push rod, 641. Insertion section, 65. Positioning bolt, 66. Adjusting nut, 7. Unloading mechanism, 71. Push ring, 72. Slide shaft, 73. Fourth return spring, 74. Unloading drive mechanism, 8. Vibrating plate. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and their descriptions are used to explain this application, but are not intended to limit it.

[0033] refer to Figures 1 to 9 ,like Figure 1 and Figure 2 As shown, this embodiment provides a punching processing device for cylindrical workpieces, including a base 1 and a workpiece conveying mechanism 3, a feeding mechanism 4, a punching mechanism 5, a loading mechanism 6, and a unloading mechanism 7, all disposed on the base 1. The punching mechanism 5 has a horizontally disposed positioning die 531 and a stamping die head that works in cooperation with the positioning die 531. Workpieces conveyed by the workpiece conveying mechanism 3 fall one by one into the receiving port of the feeding mechanism 4. After the feeding mechanism 4 delivers the workpiece to the corresponding position, the loading mechanism 6 pushes the workpiece to make it fit on the positioning die 531. The positioning die 531 and the stamping die head generate relative movement to realize the processing of the workpiece. After processing, the workpiece is pushed away from the positioning die 531 by the unloading mechanism 7 and unloaded.

[0034] Specifically, such as Figure 9As shown, this application can be used in conjunction with a vibratory feeder 8. The vibratory feeder 8 allows workpieces to be continuously fed into the workpiece conveying mechanism 3. The structure of the vibratory feeder 8 can refer to existing technology. The workpiece conveying mechanism 3 is mounted on the base 1 via a support rod 2. The support rod 2 includes a fixed rod 21 and an adjusting rod 22 that slides with the fixed rod 21. The fixed rod 21 is fixedly connected to the base 1. The adjusting rod 22 has a vertical slot 221, through which a locking bolt passes to the fixed rod 221 and engages with the base 1. The fixed rod 21 connects and locks the fixed rod 21 and the adjusting rod 22. The height of the workpiece conveying mechanism 3 is adjusted by adjusting the height of the support rod 2. The workpiece conveying mechanism 3 has a strip-shaped adjusting hole 31. The locking bolt passes through the adjusting hole 31 and is connected to the adjusting rod 22. The adjusting hole 31 can adjust the front and rear position of the workpiece conveying mechanism 3. The workpiece conveying mechanism 3 has an inclined guide channel. The adjusting holes 31 are inclined. The feeding mechanism 4 is adjustablely mounted on the base 1.

[0035] like Figure 1 and Figure 3 As shown, the feeding mechanism 4 includes a feeding drive mechanism 41, an L-shaped receiving seat 42 connected to the feeding drive mechanism 41, and a swing stop 44 rotatably mounted on the receiving seat 42. The receiving seat 42 also has an elastic element acting on the swing stop 44. A U-shaped receiving port is formed between the receiving seat 42 and the swing stop 44. After the workpiece falls, its outer arc surface fits against the receiving port. The swing stop 44 prevents the workpiece from automatically falling from the receiving port. The swing stop 44 can swing and also facilitates the removal of the workpiece from the receiving port.

[0036] In the embodiments of this application, the elastic element is an elastic arc plate 45. One end of the elastic arc plate 45 is connected to the bottom surface of the receiving seat 42, and the other end of the elastic arc plate 45 abuts against the swing stop 44 to reset and tilt the swing stop 44.

[0037] Specifically, the other end of the elastic arc plate 45 abuts against the outer surface of the swing stop 44 away from the receiving port, preventing the swing stop 44 from moving axially along the connecting shaft. This makes the swing stop 44 easy to install and ensures a reliable working position, thus preventing the workpiece from falling off during the conveying process. When the workpiece is pushed to the positioning mold 531, during the retraction and reset process of the receiving seat 42, the swing stop 44 will swing after being blocked by the feeding mechanism 6, thereby deforming the elastic arc plate 45. After the swing stop 44 separates from the feeding mechanism 6, the elastic arc plate 45 resets, causing the swing stop 44 to reset as well. Using the swing stop 44 and the elastic arc plate 45 makes it easy to control the state of the receiving port, which simplifies the structure of the feeding mechanism 4.

[0038] In the embodiments of this application, the receiving seat 42 is connected to a baffle plate 43 that can prevent the workpiece conveying mechanism 3 from dropping materials.

[0039] Specifically, the feeding drive mechanism 41 is connected to the first mounting seat 11 of the base 1. The receiving seat 42 is also provided with a limiting rod 46 that slides with the first mounting seat 11 to prevent the receiving seat 42 from rotating. The first mounting seat 11 has a through groove for the baffle plate 43 to pass through. The top of the workpiece after falling into the receiving seat 42 is basically flush with the top surface of the baffle plate 43. When the receiving seat 42 feeds, the baffle plate 43 is attached to and moves with the discharge end face of the workpiece conveying mechanism 3, thereby preventing the workpiece located in the workpiece conveying mechanism 3 from falling accidentally, and realizing the control of falling one by one, thus preparing for the realization of automatic continuous punching processing.

[0040] In the embodiments of this application, such as Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the stamping mechanism 5 also includes a floating mold frame 53 with elastic floating and lifting configuration and an upper pressure plate 54 with elastic floating and lifting configuration above the floating mold frame 53. The stamping die head includes a lower stamping die head 57 mounted on the base 1 and an upper stamping die head 542 mounted on the upper pressure plate 54. The positioning die head 531 is located on the floating mold frame 53, and the lower stamping die head 57 is located below the positioning die head 531. The positioning die head 531 has two die holes 5311 corresponding to the lower stamping die head 57 and the upper stamping die head 542, respectively. When the upper pressure plate 54 is pressed down by external force, it will drive the upper stamping die head 542 to press down and also drive the floating mold frame 53 to press down, thereby driving the positioning die head 531 to press down and move closer to the lower stamping die head 57 to complete the stamping work at both ends.

[0041] Preferably, in this application, the positioning female mold 531 is a cylindrical body with two radial cross-sections on the outside.

[0042] In the embodiments of this application, the punching mechanism 5 further includes at least one guide rod 51 connected to the base 1 and at least one telescopic rod 52 connected between the upper pressure plate 54 and the base 1. The corresponding guide hole 541 of the upper pressure plate 54 is slidably connected to the corresponding guide rod 51. The floating mold frame 53 slides along the guide rod 51 and the telescopic rod 52. A second return spring 55 is sleeved on the guide rod 51 and abuts against the bottom of the floating mold frame 53. Two third return springs 56 are sleeved on the telescopic rod 52 and are respectively located at both ends of the floating mold frame 53.

[0043] Preferably, in this application, the guide rod 51 and the telescopic rod 52 are provided in pairs. The guide rod 51 can control the positional accuracy of the floating mold frame 53. The use of the telescopic rod 52 does not affect the top space of the upper pressure plate 54 when the upper pressure plate 54 is pressed down, which facilitates the combination of the upper pressure plate 54 with other power mechanisms. It can also add multiple third return springs 56 to improve the reset efficiency of the floating mold frame 53 and the upper pressure plate 54, so that the floating mold frame 53 can quickly and smoothly enter the reset position and improve production efficiency.

[0044] In the embodiments of this application, the floating mold frame 53 is further provided with an upper guide seat 533 that slides with the upper stamping die 542 and a lower guide seat 532 that slides with the lower stamping die 57. The upper guide seat 533 and the lower guide seat 532 are both provided with arc-shaped support surfaces that cooperate with the outer peripheral surface of the workpiece. The arrangement of the upper guide seat 533 and the lower guide seat 532 can increase the strength of the stamping die and improve its service life while providing guidance for the stamping die, and also enable small-sized stamping dies to be used in this application.

[0045] In the embodiments of this application, the base 1 is provided with a vertical fixing bolt 58, and a limiting nut 59 is connected to the fixing bolt 58. The floating mold frame 53 has a clearance hole corresponding to the position of the fixing bolt 58. The limiting nut 59 prevents the floating mold frame 53 from continuing to press down by abutting against the bottom surface of the floating mold frame 53, preventing the floating mold frame 53 from pressing down excessively, making the punching action reliable. Moreover, by adjusting the position of the limiting nut 59, the optimal pressing amplitude of the floating mold frame 53 can be adjusted, shortening the time for manual operation and maximizing production efficiency.

[0046] In the embodiments of this application, the unloading mechanism 7 includes a push ring 71 slidably sleeved on the positioning female mold 531, a movable frame connected to the push ring 71, and an unloading drive mechanism 74 acting on the movable frame.

[0047] In the embodiments of this application, the movable frame includes at least two sliding shafts 72 penetrating the floating mold frame 53. The push ring 71 is connected to the cantilever end of the sliding shaft 72. A fourth return spring 73 sleeved on the sliding shaft 72 drives the movable frame to move closer to the unloading drive mechanism 74, thereby driving the push ring 71 to retract. This structure positions the unloading drive mechanism 74 on the back of the floating mold frame 53, thus not affecting the operation of the feeding mechanism 4, the punching mechanism 5, and the loading mechanism 6. It also makes the structure more compact, allowing the unloading drive mechanism 74 to abut against the movable frame, preventing the unloading drive mechanism 74 from affecting the lifting and lowering operation of the movable frame.

[0048] In the embodiments of this application, the feeding mechanism 6 includes a lifting feeding drive mechanism 62 and a push rod 64 connected to the feeding drive mechanism 62. During the stamping operation, the push rod 64 abuts against the outer end face of the workpiece and rises and falls synchronously with the floating mold frame 53 to achieve fixed clamping of the workpiece, avoiding workpiece displacement during the stamping process, causing workpiece deformation or processing position misalignment and scrapping, so that the clamping reliability of the workpiece is not affected by the shape, and can meet the clamping and fixing of irregularly shaped shells.

[0049] In a preferred embodiment of this application, the front end of the push rod 64 has an insertion section 641 that can be inserted into the inner hole of the workpiece. During the process of the workpiece being pushed by the push rod 64, the cooperation between the insertion section 641 and the workpiece can limit the workpiece and prevent it from tilting up and down and falling off.

[0050] In the embodiments of this application, a slide block 61 is installed on the feeding drive mechanism 62. The slide block 61 is slidably disposed on the vertical guide rail 12 of the base 1. The top of the vertical guide rail 12 has a top stop block to prevent the slide block 61 from continuing to rise. An upward reset elastic element is provided between the feeding drive mechanism 62 and the base 1. A positioning bolt 65 is connected to the feeding drive mechanism 62. A truss 543 fixedly disposed on the upper pressure plate 54 is slidably sleeved on the positioning bolt 65. An adjusting nut 66 located above the truss 543 is connected to the positioning bolt 65. After the insertion section 641 is inserted and connected to the workpiece, it can also be... When the floating mold frame 53 rises and falls, it drives the push rod 64 to rise and fall synchronously. The structure is compact and the synchronization is higher. After the floating mold frame 53 is pressed down to the position, when the upper pressure plate 54 continues to press down, the truss 543 will slide along the positioning bolt 65, thus not restricting the movement of the upper pressure plate 54. The adjusting nut 66 is used to limit the reset position of the truss 543, thereby limiting the position of the upper punching die head 542. The reset position of the upper pressure plate 54 is adjusted by turning the adjusting nut 66. With the above structure, the structure of synchronous driving of the push rod 64 and the floating mold frame 53 is simple and compact, and the synchronization is high.

[0051] Specifically, the slide block 61 is also slidably connected to the upright rod provided on the base 1, and the upright rod is fitted with a first return spring 63 that abuts against the bottom surface of the slide block 61.

[0052] In this application, the feeding drive mechanism 41, the loading drive mechanism 62, and the unloading drive mechanism 74 are all cylinders.

[0053] In this application, when it is necessary to process cylindrical workpieces with different shapes but the same inner diameter, the receiving seat 42, the upper guide seat 533, and the lower guide seat 532 can be replaced; when it is necessary to process cylindrical workpieces with the same shape but different inner diameter, the positioning mold 531 and / or the push rod 64 can be replaced; when it is necessary to process cylindrical workpieces with the same inner hole and an arc surface that mates with the upper guide seat 533 and the lower guide seat 532, the corresponding receiving seat 42 can be replaced.

[0054] In use, the vibratory feeder 8 causes the workpieces to enter the guide channel of the workpiece conveying mechanism 3 in sequence. The workpieces located in the guide channel will fall one by one into the receiving port of the feeding mechanism 4 by gravity. At this time, the distance between the push rod 64 and the positioning die 531 is the largest. After the feeding mechanism 4 sends the workpiece to the corresponding position (between the push rod 64 and the positioning die 531), the push rod 64 moves to push the workpiece so that the workpiece is fitted on the positioning die 531 and held in a supporting state. The receiving port retracts and resets. Then, under the action of external force, the upper pressure plate 54 is driven to press down, so that the positioning die 531 and the stamping die head generate relative movement to realize the processing of the workpiece. After the processing is completed, the workpiece is pushed away from the positioning die 531 by the push ring 71 of the unloading mechanism 7 and unloaded. The workpiece processing is completed.

[0055] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to the embodiments of this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A punching device for cylindrical workpieces, comprising a base (1), characterized in that, It also includes a workpiece conveying mechanism (3), a feeding mechanism (4), a punching mechanism (5), a loading mechanism (6), and a unloading mechanism (7) all mounted on the base (1). The punching mechanism (5) has a horizontally mounted positioning die (531) and a stamping die head that works in cooperation with the positioning die (531). The workpieces conveyed by the workpiece conveying mechanism (3) will fall into the receiving port of the feeding mechanism (4) one by one. After the feeding mechanism (4) sends the workpiece to the corresponding position, the loading mechanism (6) pushes the workpiece to make it fit on the positioning die (531). The positioning die (531) and the stamping die head generate relative motion to realize the processing of the workpiece. After the processing is completed, the workpiece is pushed away from the positioning die (531) by the unloading mechanism (7) and unloaded.

2. The punching apparatus for cylindrical workpieces according to claim 1, characterized in that, The feeding mechanism (4) includes a feeding drive mechanism (41), an L-shaped receiving seat (42) connected to the feeding drive mechanism (41), and a swing stop (44) rotatably mounted on the receiving seat (42). The receiving seat (42) is also provided with an elastic element acting on the swing stop (44). A receiving port is formed between the receiving seat (42) and the swing stop (44).

3. The punching apparatus for cylindrical workpieces according to claim 2, characterized in that, The elastic element is an elastic arc plate (45). One end of the elastic arc plate (45) is connected to the receiving seat (42), and the other end of the elastic arc plate (45) abuts against the swing stop (44) to reset and tilt the swing stop (44).

4. The punching apparatus for cylindrical workpieces according to claim 2, characterized in that, The receiving seat (42) is connected to a baffle plate (43) that can prevent the workpiece conveying mechanism (3) from dropping materials.

5. The punching apparatus for cylindrical workpieces according to claim 1, characterized in that, The stamping mechanism (5) further includes a floating mold frame (53) that is elastically floating and an upper pressure plate (54) that is elastically floating above the floating mold frame (53). The stamping die head includes a lower stamping die head (57) installed on the base (1) and an upper stamping die head (542) installed on the upper pressure plate (54). The positioning die (531) is located on the floating mold frame (53), the lower stamping die head (57) is located below the positioning die head (531), and the upper pressure plate (54) presses down to complete the stamping work.

6. The punching apparatus for cylindrical workpieces according to claim 5, characterized in that, The punching mechanism (5) further includes at least one guide rod (51) connected to the base (1) and at least one telescopic rod (52) connected between the upper pressure plate (54) and the base (1). The upper pressure plate (54) is slidably connected to the guide rod (51). The floating mold frame (53) slides along the guide rod (51) and the telescopic rod (52). A second return spring (55) is sleeved on the guide rod (51) and abuts against the bottom of the floating mold frame (53). Two third return springs (56) are sleeved on the telescopic rod (52) and located at both ends of the floating mold frame (53).

7. The punching apparatus for cylindrical workpieces according to claim 5, characterized in that, The floating mold frame (53) is also provided with an upper guide seat (533) that slides with the upper stamping die (542) and a lower guide seat (532) that slides with the lower stamping die (57).

8. The punching apparatus for cylindrical workpieces according to claim 5, characterized in that, The base (1) is provided with a fixing bolt (58), and a limit nut (59) is connected to the fixing bolt (58). The limit nut (59) prevents the floating mold frame (53) from continuing to press down by abutting against the bottom surface of the floating mold frame (53).

9. The punching apparatus for cylindrical workpieces according to claim 5, characterized in that, The unloading mechanism (7) includes a push ring (71) slidably sleeved on the positioning female mold (531), a movable frame connected to the push ring (71), and an unloading drive mechanism (74) acting on the movable frame.

10. The punching apparatus for cylindrical workpieces according to claim 9, characterized in that, The movable frame includes at least two sliding shafts (72) that pass through the floating mold frame (53). The push ring (71) is connected to the cantilever end of the sliding shaft (72). A fourth return spring (73) sleeved on the sliding shaft (72) drives the movable frame to move closer to the unloading drive mechanism (74) to drive the push ring (71) to retract.

11. The punching apparatus for cylindrical workpieces according to claim 5, characterized in that, The feeding mechanism (6) includes a lifting feeding drive mechanism (62) and a push rod (64) connected to the feeding drive mechanism (62). During the stamping operation, the push rod (64) abuts against the end face of the workpiece and rises and falls synchronously with the floating mold frame (53).

12. The punching apparatus for cylindrical workpieces according to claim 11, characterized in that, The front end of the push rod (64) has an insertion section (641) that can be inserted into the inner hole of the workpiece.

13. The punching apparatus for cylindrical workpieces according to claim 11 or 12, characterized in that, The feeding drive mechanism (62) is slidably mounted on the vertical guide rail (12) of the base (1). An upward reset elastic element is provided between the feeding drive mechanism (62) and the base (1). A positioning bolt (65) is connected to the feeding drive mechanism (62). A truss (543) fixedly mounted on the upper pressure plate (54) is slidably mounted on the positioning bolt (65). An adjusting nut (66) located above the truss (543) is connected to the positioning bolt (65).

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