A multi-station door panel punching machine

Abstract

The present invention relates to a multi-station door panel punching machine, comprising a base, characterized in that: it also comprises a support column whose lower end is fixedly connected to the base, a bearing gear matched with the middle part of the support column, a ring-shaped turntable fixedly connected to the bearing gear and coaxially arranged with the support column, and a stamping part fixedly connected to the upper end of the support column, and the door panel punching machine also comprises a driving motor fixed to the base, the output end of the driving motor is fixedly connected to a driving gear, and the driving gear is meshed with the bearing gear; a plurality of door panel punching dies are fixed on the turntable, and the stamping part is located above the door panel punching dies and corresponds to the door panel punching dies. It can select the door panel punching dies according to different needs, can improve the punching accuracy, punching efficiency and working reliability; can prevent the door panel from being damaged and ensure the integrity of the door panel; it is convenient to process and manufacture, and the parts are easy to install and replace, with a long service life and low cost.

Description

Technical Field

[0001] The invention relates to a multi-station door panel punching machine. Background Art

[0002] The door lock hole and other installation holes on the door panel are necessary holes of the door panel. According to user needs, some door panels are also provided with cat's eye holes, etc. The processing of these holes on the door panel is generally completed by stamping. The existing door panel punching machine can generally only punch a single hole on the door panel. To complete the punching of the entire door panel, the punching die needs to be replaced multiple times, or if the punching die is not replaced, multiple punching door panel punching machines are required, which affects the punching efficiency. Therefore, the existing door panel punching machine needs to be improved. Summary of the invention

[0003] The purpose of the present invention is to provide a multi-station door panel punching machine, which can select door panel punching molds according to different needs, improve punching accuracy, punching efficiency and working reliability; prevent door panels from being damaged and ensure the integrity of door panels; easy to process and manufacture, easy to install and replace parts, long service life and low cost.

[0004] A multi-station door panel punching machine described in the present invention includes a base, and is characterized in that it also includes a support column with a lower end fixedly connected to the base, a bearing gear matched with the middle of the support column, an annular turntable fixedly connected to the bearing gear and coaxially arranged with the support column, and a stamping part fixedly connected to the upper end of the support column. The door panel punching machine also includes a driving motor fixed to the base, and the output end of the driving motor is fixedly connected to a driving gear, which is meshed with the bearing gear; a plurality of door panel punching dies are fixed on the turntable, and the stamping part is located above the door panel punching dies and corresponds to them.

[0005] Furthermore, a driving cylinder is fixed on the base, a positioning rod is fixed to the upper end of the piston rod of the driving cylinder, a plurality of positioning holes are provided on the turntable, the diameter of the positioning holes is larger than the diameter of the positioning rod, and the distance from the axis line of the positioning rod to the axis line of the support column is equal to the distance from the center line of the positioning hole to the axis line of the support column.

[0006] Furthermore, the stamping part includes a stamping cylinder fixed on the support column and a stamping head fixedly connected to the lower end of the piston rod of the stamping cylinder, and the stamping head is located above and corresponding to the door panel punching die.

[0007] Furthermore, the door panel punching die includes a die base, which includes a lower die base fixedly connected to the turntable, and an upper die base corresponding to and connected to the lower die base; the door panel punching die also includes a die assembly connected to the lower die base, and a punch assembly connected to the upper die base, and the punch assembly is arranged corresponding to the die assembly; the punch assembly includes a conversion sleeve connected to the step hole of the upper die base, a plurality of guide columns evenly distributed around the step hole of the upper die base, a spring 8 sleeved on each guide column, and an annular pressure plate matched with the upper end portions of the plurality of guide columns, the lower end of the spring is tightly attached to the upper portion of the upper die base, The upper end is tightly attached to the annular pressure plate; the punch assembly also includes a guide sleeve whose lower part is located in the conversion sleeve and is cylindrical, a mold core located in and matched with the guide sleeve, and a pressure pin whose one end matches with the mounting hole at the upper end of the guide sleeve, and the other end of the pressure pin is tightly pressed on the annular pressure plate; the upper part of the mold core extends out of the top of the guide sleeve, and the upper end of the mold core is matched with an impact head corresponding to the punching head; the upper sleeve of the mold core is provided with a compression spring, the lower end of the compression spring is tightly attached to the top of the guide sleeve, and the upper end is tightly attached to the upper end of the impact head, and the compression force of the compression spring is greater than the sum of the compression forces of all springs.

[0008] Furthermore, a stripper plate is connected in cooperation with the lower end of the guide sleeve, the lower end of the stripper plate extends out of the lower end of the guide sleeve, and a through hole is provided in the middle part for the lower part of the mold core to pass through.

[0009] Furthermore, the mold core includes a punch and a core shaft whose lower end is matched with the upper end of the punch; the punch is in a stepped shape with a larger upper portion and a smaller lower portion, and its upper portion matches with the inner hole of the guide sleeve, and its lower portion corresponds to the through hole in the middle of the stripper plate; the core shaft is in a stepped shape with a larger lower portion and a smaller upper portion, and its lower portion matches with the inner hole of the guide sleeve, and its upper portion extends out of the top of the guide sleeve, the compression spring sleeve is arranged on the upper portion of the core shaft, and the impact head is matched with the upper end of the core shaft.

[0010] Furthermore, a first guide groove is vertically provided on the guide sleeve, and a second limit pin is provided on the upper edge of the punch or the lower edge of the core shaft with one end fixedly connected thereto, and the other end of the second limit pin is located in the first guide groove of the guide sleeve; a second guide groove is vertically provided on the guide sleeve, and a third limit pin is provided on the conversion sleeve with one end fixedly connected thereto, and the other end of the third limit pin is located in the second guide groove of the guide sleeve.

[0011] Furthermore, the die assembly includes a die, which is provided with a pressing platform corresponding to the stripper plate, and cutting holes corresponding to the through holes of the stripper plate are provided on the middle of the die and the turntable; a limiting groove is provided on the edge of the die, and a first limiting pin with one end fixedly connected thereto is provided on the lower die base, and the other end of the first limiting pin cooperates with the limiting groove of the die for limiting positioning; a door panel rest platform is fixed to the base through a bracket, and the top of the door panel rest platform is on the same plane as the top of the pressing platform.

[0012] Furthermore, the conversion sleeve is in a stepped shape with a larger upper portion and a smaller lower portion, and its upper portion protrudes outward to form a flange, and an annular guide portion extending upward is provided on the flange.

[0013] Furthermore, a plurality of annular oil grooves are provided on the outer peripheral surface of the guide sleeve.

[0014] Beneficial technical effects of the present invention:

[0015] Since a plurality of door panel punching dies are fixed on the turntable, and the turntable is driven to rotate by gear meshing to select the door panel punching dies, the punching efficiency can be improved and the working reliability can be improved; since a positioning hole is provided on the turntable and a positioning rod is provided on the base, when the operator selects the required door panel punching die and rotates it to the specified position, the piston rod of the driving cylinder is controlled to extend so that the positioning rod extends into the positioning hole on the turntable, so that the turntable can be positioned, and the turntable can be prevented from rotating during the punching process, so that the punching accuracy can be improved and the driving motor can be protected at the same time; since the compression force of the compression spring is greater than the sum of the compression forces of all springs, the door panel can be pressed by the guide sleeve before punching the door panel, so that the punching accuracy and the punching efficiency are improved; since the conversion sleeve is connected with the upper die seat, the guide sleeve moves up and down along the inner hole of the conversion sleeve, so that the service life of the door panel punching die is extended and the production cost is reduced. The invention relates to a door panel punching die having a plurality of holes, a plurality of holes are formed between the mold core and the guide sleeve, and a plurality of holes are provided between the mold core and the guide sleeve. The plurality of holes are provided with a plurality of holes, and a plurality of holes are provided between the mold core and the guide sleeve. The plurality of holes are provided with a plurality of holes, and a plurality of holes are provided between the mold core and the guide sleeve. The plurality of holes are provided with a plurality of holes, and a plurality of holes are provided between the mold core and the guide sleeve. The plurality of holes are provided with a plurality of holes, and a plurality of holes are provided between the mold core and the guide sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is one of the structural schematic diagrams of the present invention;

[0017] Figure 2 This is the second structural schematic diagram of the present invention;

[0018] Figure 3 It is one of the structural schematic diagrams of the door panel punching die;

[0019] Figure 4 This is the second structural diagram of the door panel punching die;

[0020] Figure 5 yes Figure 4 AA section view;

[0021] Figure 6 It is a schematic diagram of the matching structure of the die assembly, the conversion sleeve and the die base;

[0022] Figure 7 This is the third structural diagram of the door panel punching die (the guide sleeve and die core are not shown);

[0023] Figure 8 This is one of the schematic diagrams of the matching structure between the mold core and the guide sleeve;

[0024] Fig. 9 This is the second schematic diagram of the matching structure of the mold core and the guide sleeve;

[0025] Fig.10 yes Fig. 9 BB cross-sectional view;

[0026] Fig.11 It is a structural schematic diagram of the guide sleeve;

[0027] Fig.12 It is a structural diagram of the conversion sleeve.

[0028] In the figure: 10-door panel punching die, 11-base, 12-drive motor, 13-support column, 14-bearing gear, 15-turntable, 16-stamping part, 17-drive cylinder, 18-positioning rod, 19-door panel shelf;

[0029] 101-die base;

[0030] 102-lower die base, 103-upper die base;

[0031] 104-die, 105-first limiting pin;

[0032] 106-conversion sleeve, 107-guide column, 108-spring, 109-annular pressure plate, 1010-guide sleeve, 1011-mold core, 1012-impact head, 1013-compression spring, 1014-pressure pin, 1015-stripping plate;

[0033] 1016-pressing table, 1017-cutting hole;

[0034] 1018-flange, 1019-annular guide portion, 1020-third limiting pin;

[0035] 1021 - mounting hole, 1022 - first guide groove, 1023 - second guide groove, 1024 - oil groove;

[0036] 1025-punch, 1026-mandrel, 1027-second limiting pin;

[0037] 121-driving gear;

[0038] 151- positioning hole;

[0039] 161-punching cylinder, 162-punching head. DETAILED DESCRIPTION

[0040] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0041] See also Figures 1 to 12 The multi-station door panel punching machine shown includes a base 11, characterized in that it also includes a support column 13 whose lower end is fixedly connected to the base 11, a bearing gear 14 matched with the middle of the support column 13, an annular turntable 15 fixedly connected to the bearing gear 14 and coaxially arranged with the support column 13, and a stamping part 16 fixedly connected to the upper end of the support column 13. The door panel punching machine also includes a drive motor 12 fixed to the base 11, and the output end of the drive motor 12 is fixedly connected to a drive gear 121, which is meshed with the bearing gear 14; a plurality of door panel punching dies 10 are fixed on the turntable 15, and the stamping part 16 is located above the door panel punching dies 10 and corresponds to them. The door panel punching dies 10 are generally evenly distributed at the edge of the turntable 15, and the door panel punching dies 10 are selected according to the size and shape of the punching required on the door panel, and are installed and fixed on the turntable 15. The driving gear 121 of the driving motor 12 rotates, driving the bearing gear 14 to rotate, thereby driving the turntable 15 to rotate; the operator controls the rotation of the turntable 15 to rotate the required door panel punching die 10 to the bottom of the stamping part 16, thereby punching the door panel. The output end of the driving motor 12 is connected to a reduction mechanism, and the driving gear 121 is fixed to the output end of the reduction mechanism, so that the operator can control the turntable 15 more accurately. The punching efficiency can be improved, and the gear meshing method makes the transmission smooth and the operation reliable.

[0042] A driving cylinder 17 is fixed on the base 11, and a positioning rod 18 is fixed on the upper end of the piston rod of the driving cylinder 17. A plurality of positioning holes 151 are provided on the turntable 15, and the diameter of the positioning hole 151 is larger than the diameter of the positioning rod 18, and the distance from the axis of the positioning rod 18 to the axis of the support column 13 is equal to the distance from the center line of the positioning hole 151 to the axis of the support column 13. The number of positioning holes 151 on the turntable 15 is the same as the number of door panel punching dies 10 that can be fixed; when the operator selects the required door panel punching die 10, it is rotated to the bottom of the stamping part 16, and at this time, the piston rod of the driving cylinder 17 is controlled to extend, so that the positioning rod 18 penetrates the positioning hole 151 on the turntable 15, so that the turntable 15 can be positioned, and the turntable 15 can be prevented from rotating during the punching process, which can improve the punching accuracy and protect the driving motor 12.

[0043] The punching part 16 includes a punching cylinder 161 fixed on the support column 13 and a punching head 162 fixedly connected to the lower end of the piston rod of the punching cylinder 161. The punching head 162 is located above the door panel punching die 10 and corresponds to it.

[0044] The door panel punching die 10 includes a die base 101 in a "[" shape, and the die base 101 includes a lower die base 102 fixedly connected to the turntable 15, and an upper die base 103 corresponding to and connected to the lower die base 102; the door panel punching die 10 also includes a die assembly connected to the lower die base 102, and a punch assembly connected to the upper die base 103, and the punch assembly is arranged corresponding to the die assembly; the punch assembly includes a conversion sleeve 106 connected to the stepped hole of the upper die base 103, a plurality of guide posts 107 uniformly distributed around the stepped hole of the upper die base 103, a spring 108 sleeved on each guide post 107, and an annular pressure plate 109 matched with the upper end of the plurality of guide posts 107, the lower end of the spring 108 is in close contact with the upper part of the upper die base 103, and the upper end is in close contact with the annular pressure plate 109; the punch assembly also It includes a guide sleeve 1010 with a cylindrical lower portion located in the conversion sleeve 106, a core mold 1011 located in and matched with the guide sleeve 1010, and a press pin 1014 with one end matched with the mounting hole 1021 at the upper end of the guide sleeve 1010, and the other end of the press pin 1014 is tightly pressed on the annular pressure plate 109; the upper portion of the core mold 1011 extends out of the top of the guide sleeve 1010, and the upper end of the core mold 1011 is matched with an impact head 1012 corresponding to the punch head 162, and the impact head 1012 is in a stepped shape with a larger upper portion and a smaller lower portion; the upper portion of the core mold 1011 is sleeved with a compression spring 1013, the lower end of the compression spring 1013 is tightly attached to the top of the guide sleeve 1010, and the upper end is tightly attached to the step surface of the impact head 1012, and the compression force of the compression spring 1013 is greater than the sum of the compression forces of all springs 108. After the operator selects the required door panel punching die 10 and rotates it to the bottom of the punching head 162 of the punching part 16, the part of the door panel to be punched is placed between the lower die base 102 and the upper die base 103; the piston rod of the punching cylinder 161 is controlled to drive the punching head 162 to move downward, thereby driving the impact head 1012 to move downward. In this project, since the compression force of the compression spring 1013 is greater than the sum of the compression forces of all springs 108, the spring 108 is compressed first. At this time, the mold core 1011 and the guide sleeve 1010 move downward with the annular pressure plate 109. There is no relative movement between the mold core 1011 and the guide sleeve 1010, and the lower end of the guide sleeve 1010 presses the door panel first; when the impact head 1012 continues to move downward, the compression spring 1013 is compressed, and the mold core 1011 moves downward relative to the guide sleeve 1010 to punch the door panel; after the punching is completed, it automatically returns to its original position due to the restoring force of the spring 108 and the compression spring 1013. By pressing the door panel first and then punching, the punching accuracy and efficiency can be improved.Furthermore, by connecting the conversion sleeve 106 to the upper die seat 103, the guide sleeve 1010 cooperates with the inner hole of the conversion sleeve 106, which can extend the service life of the door panel punching die 10 and reduce the cost; if the conversion sleeve 106 is not provided, the matching hole of the guide sleeve 1010 needs to be processed on the upper die seat 103, which will cause inconvenience in processing. At the same time, due to the material of the upper die seat 103, the accuracy and smoothness of the matching hole cannot be guaranteed, and the guide sleeve 1010 will be greatly worn when moving up and down along the matching hole, which seriously affects the service life of the die seat 101 and the guide sleeve 1010. The guide column 107 can be a bolt with a thread at the lower end, a rod in the middle, and a head at the upper end. The lower end is screwed to the upper die seat 103, and the spring 108 is sleeved on the rod. The head and the spring 108 realize the positioning of the annular pressure plate 109.

[0045] The lower end of the guide sleeve 1010 is matched with a stripper plate 1015, the lower end of which extends out of the lower end of the guide sleeve 1010, and the middle part of which is provided with a through hole for the lower part of the mold core 1011 to pass through. The stripper plate 1015 presses the door panel to prevent the door panel from being damaged or indented, thereby ensuring the integrity of the door panel.

[0046] The mold core 1011 includes a punch 1025, and a mandrel 1026 whose lower end is matched with the upper end of the punch 1025; the punch 1025 is in a step-like shape with a larger upper portion and a smaller lower portion, and its upper portion matches the inner hole of the guide sleeve 1010, and its lower portion corresponds to the through hole in the middle of the stripper plate 1015; the mandrel 1026 is in a step-like shape with a larger lower portion and a smaller upper portion, and its lower portion matches the inner hole of the guide sleeve 1010, and its upper portion extends out of the top of the guide sleeve 1010, the compression spring 1013 is sleeved on the upper portion of the mandrel 1026, and the impact head 1012 is matched with the upper end of the mandrel 1026. The mold core 1011 is formed by connecting the punch 1025 and the mandrel 1026, and can be easily installed and replaced.

[0047] The guide sleeve 1010 is vertically provided with a first guide groove 1022, and the upper edge of the punch 1025 or the lower edge of the mandrel 1026 is provided with a second stop pin 1027 with one end fixedly connected thereto, and the other end of the second stop pin 1027 is located in the first guide groove 1022 of the guide sleeve 1010; the guide sleeve 1010 is vertically provided with a second guide groove 1023, and the conversion sleeve 106 is provided with a third stop pin 1020 with one end fixedly connected thereto, and the other end of the third stop pin 1020 is located in the second guide groove 1023 of the guide sleeve 1010. The second stop pin 1027 can prevent the mold core 1011 from rotating relative to the guide sleeve 1010, thereby affecting the punching accuracy. The third stop pin 1020 can prevent the guide sleeve 1010 from rotating relative to the conversion sleeve 106, thereby affecting the punching accuracy.

[0048] The die assembly includes a die 104, on which a pressing platform 1016 corresponding to the stripper plate 1015 is provided, and a cutting hole 1017 corresponding to the through hole of the stripper plate 1015 is provided in the middle of the die 104 and the turntable 15; a limiting groove is provided at the edge of the die 104, and a first limiting pin 105 with one end fixedly connected thereto is provided on the lower die base 102, and the other end of the first limiting pin 105 cooperates with the limiting groove of the die 104 for limiting; a door panel resting platform 19 is fixed to the base 11 through a bracket, and the top of the door panel resting platform 19 is on the same plane as the top of the pressing platform 1016. Generally, two door panel resting platforms 19 are provided, which are located on both sides below the stamping part 16, respectively, and can hold up the door panel, and at the same time can disperse the force during punching to further avoid deformation of the door panel, see Figure 1 As shown; the stripping plate 1015, the pressing platform 1016, and the door panel placement platform 19 are all made of a material with a lower hardness than the door panel, or are covered with a colloid material on their surface to avoid damage to the door panel; the cutting hole 1017 can avoid the punch 1025 and facilitate the falling of the cut material after punching; the first limit pin 105 can prevent the die 104 from rotating relative to the lower die seat 102.

[0049] The conversion sleeve 106 is in a stepped shape with a larger upper portion and a smaller lower portion, and its upper portion protrudes outward to form a flange 1018. An annular guide portion 1019 extending upward is provided on the flange 1018. The annular guide portion 1019 extends out of the upper surface of the upper die holder 103, thereby increasing the contact area between the guide sleeve 1010 and the conversion sleeve 106, and can better guide the guide sleeve 1010, thereby ensuring the movement reliability of the guide sleeve 1010.

[0050] The outer circumferential surface of the guide sleeve 1010 is provided with a plurality of annular oil grooves 1024. The annular oil grooves 1024 store lubricating oil, which can lubricate the guide sleeve 1010 and the conversion sleeve 106, reduce wear and tear, and extend their service life.

Claims

1. A multi-station door panel punching machine, comprising a base (11), characterized in that: It also includes a support column (13) whose lower end is fixedly connected to the base (11), a bearing gear (14) matched with the middle part of the support column (13), an annular turntable (15) fixedly connected to the bearing gear (14) and coaxially arranged with the support column (13), and a stamping part (16) fixedly connected to the upper end of the support column (13). The door panel punching machine also includes a driving motor (12) fixedly connected to the base (11), the output end of the driving motor (12) is fixedly connected to a driving gear (121), and the driving gear (121) is meshed with the bearing gear (14); a plurality of door panel punching dies (10) are evenly distributed on the turntable (15), and the stamping part (16) is located above the door panel punching dies (10) and corresponds to them; The punching part (16) comprises a punching cylinder (161) fixed on the support column (13), and a punching head (162) fixedly connected to the lower end of the piston rod of the punching cylinder (161), the punching head (162) being located above the door panel punching die (10) and corresponding thereto; The door panel punching die (10) comprises a die base (101), the die base (101) comprising a lower die base (102) fixedly connected to the turntable (15), and an upper die base (103) corresponding to and cooperatively connected to the lower die base (102); the door panel punching die (10) further comprises a die assembly cooperatively connected to the lower die base (102), and a punch assembly cooperatively connected to the upper die base (103), the punch assembly being arranged corresponding to the die assembly; the punch assembly It comprises a conversion sleeve (106) connected to the stepped hole of the upper die seat (103), a plurality of guide posts (107) evenly distributed around the stepped hole of the upper die seat (103), a spring (108) sleeved on each guide post (107), and an annular pressure plate (109) matched with the upper ends of the plurality of guide posts (107), wherein the lower end of the spring (108) is in close contact with the upper part of the upper die seat (103), and the upper end is in close contact with the annular pressure plate (109); The male mold assembly further comprises a guide sleeve (1010) whose lower portion is located in the conversion sleeve (106) and is in a cylindrical shape, a mold core (1011) located in and cooperating with the guide sleeve (1010), and a pressing pin (1014) whose one end cooperates with a mounting hole (1021) at the upper end of the guide sleeve (1010), and the other end of the pressing pin (1014) is tightly pressed on the annular pressure plate (109); the upper portion of the mold core (1011) protrudes from the guide sleeve (1010) and the mold core (1011) protrudes from the guide sleeve (1010). 10), and the upper end of the mold core (1011) is matched with an impact head (1012) corresponding to the punch head (162); the upper part of the mold core (1011) is provided with a compression spring (1013), the lower end of the compression spring (1013) is in close contact with the top of the guide sleeve (1010), and the upper end is in close contact with the upper end of the impact head (1012), and the compression force of the compression spring (1013) is greater than the sum of the compression forces of all springs (108); The conversion sleeve (106) is in the shape of a step with a larger upper portion and a smaller lower portion, and its upper portion protrudes outward to form a flange (1018). An annular guide portion (1019) extending upward is provided on the upper portion of the flange (1018); The outer peripheral surface of the guide sleeve (1010) is provided with a plurality of annular oil grooves (1024).

2. The multi-station door panel punching machine according to claim 1 is characterized in that: A driving cylinder (17) is fixed on the base (11), a positioning rod (18) is fixed to the upper end of the piston rod of the driving cylinder (17), a plurality of positioning holes (151) are provided on the turntable (15), the diameter of the positioning holes (151) is larger than the diameter of the positioning rod (18), and the distance from the axis center line of the positioning rod (18) to the axis center line of the support column (13) is equal to the distance from the center line of the positioning hole (151) to the axis center line of the support column (13).

3. The multi-station door panel punching machine according to claim 2 is characterized in that: A stripping plate (1015) is connected in cooperation with the lower end of the guide sleeve (1010). The lower end of the stripping plate (1015) extends out of the lower end of the guide sleeve (1010), and a through hole is provided in the middle portion for the lower portion of the mold core (1011) to pass through.

4. The multi-station door panel punching machine according to claim 3 is characterized in that: The mold core (1011) comprises a punch (1025) and a core shaft (1026) whose lower end is matched with the upper end of the punch (1025); the punch (1025) is in a stepped shape with a larger upper portion and a smaller lower portion, and its upper portion matches the inner hole of the guide sleeve (1010), and its lower portion corresponds to the through hole in the middle of the stripper plate (1015); the core shaft (1026) is in a stepped shape with a larger lower portion and a smaller upper portion, and its lower portion matches the inner hole of the guide sleeve (1010), and its upper portion extends out of the top of the guide sleeve (1010); the compression spring (1013) is sleeved on the upper portion of the core shaft (1026), and the impact head (1012) is matched with the upper end of the core shaft (1026).

5. The multi-station door panel punching machine according to claim 4 is characterized in that: A first guide groove (1022) is vertically provided on the guide sleeve (1010); a second limit pin (1027) having one end fixedly connected thereto is provided on the upper edge of the punch (1025) or the lower edge of the core shaft (1026); the other end of the second limit pin (1027) is located in the first guide groove (1022) of the guide sleeve (1010); a second guide groove (1023) is vertically provided on the guide sleeve (1010); a third limit pin (1020) having one end fixedly connected thereto is provided on the conversion sleeve (106); the other end of the third limit pin (1020) is located in the second guide groove (1023) of the guide sleeve (1010).

6. The multi-station door panel punching machine according to claim 5 is characterized in that: The die assembly comprises a die (104), the die (104) being provided with a pressing platform (1016) corresponding to the stripping plate (1015), and a cutting hole (1017) corresponding to the through hole of the stripping plate (1015) being provided in the middle of the die (104) and on the turntable (15); a limiting groove is provided on the edge of the die (104), the lower die base (102) being provided with a first limiting pin (105) having one end fixedly connected thereto, the other end of the first limiting pin (105) being limited in position by cooperating with the limiting groove of the die (104); a door panel shelf (19) being fixed on the base (11) via a bracket, the top of the door panel shelf (19) and the top of the pressing platform (1016) being on the same plane.

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