A positioning and layout structure and method for automotive body panel molds

Abstract

This invention provides a positioning and material arrangement structure and method for automotive body panel molds, including a punching die, a punching punch, a positioning pin assembly, and a trolley. The punching punch and punching die cooperate to punch the scrap material in the middle of the part, and the punched scrap material has a positioning hole. The positioning pin assembly includes a positioning part, which can slide vertically on the lower die base to allow the positioning part to enter or exit the positioning hole. A scrap material channel is installed on the trolley, and the trolley can slide back and forth on the lower die base to allow the scrap material channel to switch between an initial position and a working position. This application optimizes the position of the positioning hole at the scrap material in the middle of the part to avoid the positioning point from overlapping and interfering with the flanged area around the part, so that the part can complete the flanged operation under reliable positioning constraints, ensuring the flanged quality. In addition, this application integrates the positioning flanged mode and the scrap punching and discharge mode into one mold and can realize flexible switching between the two modes, effectively improving processing efficiency.

Description

Technical Field

[0001] This invention belongs to the field of automotive body panel molding technology, specifically relating to a positioning and layout structure and method for automotive body panel molds. Background Technology

[0002] Automotive body panels such as engine hoods, roofs, and trunk lids are characterized by their large structural dimensions and high surface quality requirements, and their forming quality directly affects the overall appearance of the vehicle. The stamping process of automotive body panels involves multiple steps, including drawing, trimming, punching, and flanging. To ensure forming quality, it is essential to guarantee reliable positioning of the automotive body panels throughout these processes. However, some automotive body panels have shallow drawing depths or relatively simple shapes, making it difficult to guarantee positioning accuracy and stability solely based on their surface shape.

[0003] To achieve reliable positioning, some manufacturers have proposed reserving two lugs in the waste area at the rear end of the trimmed part (such as the end of the engine hood outer panel near the windshield) during the trimming process, and pre-punching positioning holes on the lugs so that the positioning holes cooperate with the positioning pins on the lower mold base to position the parts in the subsequent flanging and shaping process. However, as can be seen from the utility model patent application number CN2013208264441, when the positioning holes cooperate with the positioning pins to achieve positioning, they will interfere with the rear flanging. In order to ensure the smooth progress of the rear flanging, the lugs will be cut off before the rear flanging, which will inevitably affect the positioning reliability of the parts during the flanging process. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this invention is to provide a positioning and material arrangement structure and method for automotive body panel molds. The positioning hole is optimized to be located at the scrap material in the middle of the automotive body panel, and the scrap material punching action at the positioning hole is integrated into the final flanging and shaping mold. This allows the scrap material punching at the positioning hole to be completed directly after the positioning and flanging action. This not only ensures the positioning reliability during the flanging process, but also eliminates the need for a separate scrap material punching mold, thereby reducing costs and improving processing efficiency.

[0005] To achieve the above and other related objectives, the present invention provides a positioning and feeding structure for an automotive body panel mold, comprising a punching die located on a lower die base and a punching punch located on an upper die base; the punching die and the punching die cooperate to punch scrap material in the middle of the part, and the scrap material being punched has a positioning hole; the lower die base is provided with a positioning pin assembly and a trolley; the positioning pin assembly includes a positioning part, and the positioning pin assembly can reciprocate in the vertical direction to allow the positioning part to enter or exit the positioning hole; the trolley is equipped with a scrap material channel, and the trolley can reciprocate in the front-rear direction to allow the scrap material channel to... Switching between initial position and working position; this application optimizes the positioning hole position at the scrap area in the middle of the part to avoid overlap and interference between the positioning point and the flanged area around the part, so that the part can complete the flanged operation under reliable positioning constraints and ensure the flanged quality; in addition, the positioning pin assembly and scrap channel of this application can move independently, thereby facilitating the switching between hole positioning mode and scrap punching discharge mode by adjusting the position of the positioning pin assembly and scrap channel; this application integrates the two functional modes into one mold, which is more cost-effective than the traditional solution of developing molds for the two functional modes separately.

[0006] Preferably, the upper mold base is provided with a drive seat, and a first elastic reset member is provided between the positioning pin assembly and the lower mold base; the positioning pin assembly includes a pressed part, and the pressed part is fixedly connected to the positioning part through a transition part; when the upper mold base drives the drive seat to move downward, the drive seat presses the pressed part, so that the positioning part exits the positioning hole; this application does not require a separate drive unit for the positioning pin assembly, but only needs to associate the downward movement of the positioning pin assembly with the downward movement of the upper mold base, so as to conveniently release the positioning function of the positioning pin assembly, thereby reducing the cost and complexity of the mold.

[0007] Preferably, the upper die base is provided with a driving cutter, and the trolley is provided with a driven cutter; when the upper die base drives the driving cutter to move downward, the driving cutter and the driven cutter cooperate to push the trolley forward, so that the scrap channel on the trolley moves from the initial position to the working position; this application can adjust the position of the positioning pin assembly, the scrap channel and the punching punch by means of the downward movement of the upper die base, so that the flanging and shaping die with the positioning and discharge structure can realize positioning flanging, scrap trimming and scrap discharge without interference, thereby improving processing efficiency and processing reliability.

[0008] Preferably, the lower mold base is provided with a second elastic reset member to reset the trolley.

[0009] Preferably, the positioning and feeding structure includes a pressure block that presses the part onto the punching die; the pressure block is connected to the upper die base via a nitrogen spring, and the pressure block is provided with a clearance opening for avoiding the punching punch; the setting of the pressure block can effectively ensure the punching quality and prevent the part from shifting during the punching process.

[0010] Preferably, the positioning pin assembly and the lower mold base are slidably connected via a first guide structure; the trolley and the lower mold base are slidably connected via a second guide structure to ensure the movement stability of the positioning pin assembly and the trolley.

[0011] Preferably, the lower mold base is provided with a protective plate; the protective plate is used to shield the debris that splashes out when the second elastic reset component is damaged, thereby improving safety during use.

[0012] Preferably, the positioning pin assembly is driven by a first linear motion assembly, and / or the trolley is driven by a second linear motion assembly.

[0013] The present invention also provides a positioning and feeding method, which is implemented through the above-described positioning and feeding structure, the positioning and feeding method comprising:

[0014] Place the part on the automotive body panel mold, and make the positioning part of the positioning pin assembly fit into the positioning hole at the scrap part in the middle of the part.

[0015] The upper die holder drives the drive seat, drive cutter and punch to move down together. The drive seat first contacts the locating pin assembly, causing the locating part of the locating pin assembly to move down and exit the locating hole.

[0016] The upper die holder continues to move downward, causing the drive cutter and the driven cutter to engage, thereby pushing the trolley and the scrap channel forward together; during this process, the drive holder presses down the positioning pin assembly so that the scrap channel can smoothly reach the working position;

[0017] The upper die holder continues to move downward, allowing the punching punch and punching die to cooperate to complete the scrap punching and discharge the scrap through the scrap channel; during this process, the trolley position remains unchanged, and the drive seat presses down the positioning pin assembly.

[0018] As described above, the positioning and layout structure and method for automotive body panel molds of the present invention have the following beneficial effects:

[0019] This application optimizes the positioning hole location at the scrap area in the middle of the part to avoid overlap and interference between the positioning point and the flanging area around the part, ensuring that the part can complete the flanging under reliable positioning constraints and effectively guaranteeing the flanging quality. In addition, the positioning pin assembly and scrap channel of this application can move independently, thereby facilitating the flexible switching between the positioning flanging mode and the scrap punching and discharge mode on the flanging forming mold where the positioning and discharge structure is located by adjusting the position of the positioning pin assembly and scrap channel. The solution of integrating the two functional modes into one mold is more cost-effective than the traditional solution of developing molds for the two functional modes separately.

[0020] This application preferably adjusts the position of the positioning pin assembly, the scrap channel, and the punching punch by lowering the upper die base, so that part positioning, scrap trimming, and scrap discharge can be carried out sequentially and without interference. This not only reduces costs but also effectively improves processing reliability. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of the part.

[0022] Figure 2 for Figure 1 A magnified view of a portion at point A.

[0023] Figure 3 This is a three-dimensional view of the positioning and feeding structure of the present invention before punching parts.

[0024] Figure 4 A perspective view of the locating pin assembly and the trolley mounted on the lower mold base.

[0025] Figure 5 An assembly perspective view of the pulley, waste passage, and driven inserter.

[0026] Figure 6 This is a structural diagram of the locating pin assembly.

[0027] Figure 7 A perspective view of the drive base, drive cutter, and pressure block mounted on the upper mold base.

[0028] Figure 8 This is an exploded view of the upper mold base and the pressure plate.

[0029] Figure 9 This is a schematic diagram of the positioning and feeding structure in the positioning state of the present invention.

[0030] Figure 10 This is a schematic diagram showing the state of the waste channel of the positioning and discharge structure in this invention when it is about to leave its initial position.

[0031] Figure 11 This is a schematic diagram showing the state of the waste channel of the positioning and discharging structure in this invention as it moves towards the working position.

[0032] Figure 12 This is a schematic diagram showing the state of the waste channel of the positioning and discharging structure of the present invention when it reaches the working position.

[0033] Explanation of reference numerals in the attached figures

[0034] Part 01, Scrap 011, Positioning Hole 012, Lower Die Base 10, Punching Die 11, First Elastic Reset Part 12, Second Elastic Reset Part 13, First Limiting Part 14, Horizontal Guide Rod 15, Second Stop Part 16, Protective Plate 17, Upper Die Base 20, Punching Punch 21, Drive Base 22, Drive Insert Tool 23, Drive Inclined Surface 231, Vertical Front Side 232, Pressure Block 24, Pressure Plate 241, Nitrogen Spring 242, Horizontal Positioning Pin 25, Vertical Slide 251, Positioning Part 31, Pressed Part 32, Transition Part 33, Vertical Guide Rod 34, Guide Sleeve 341, Vertical Slide 35, First Stop Part 351, Trolley 40, Clearance Space 40a, Scrap Channel 41, Driven Insert Tool 42, Driven Inclined Surface 421, Vertical Rear Side 422, Horizontal Slider 43, Horizontal Rail 431. Detailed Implementation

[0035] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0036] Please see Figures 1 to 12 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding and reading. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0037] The positioning and feeding structure of the present invention is installed on the automotive body panel mold in the last flanging and forming process. It is used for positioning the parts 01 of automotive body panels such as engine hood outer panels and automotive roofs during flanging and forming, and for punching and discharging the waste material after flanging and forming.

[0038] like Figure 1 and Figure 2 As shown, the part 01 to be processed in this application has a pre-punched positioning hole 012, and the positioning hole 012 is located on the scrap 011 in the middle of the part 01.

[0039] It should be noted that the scrap material 011 in the middle of part 01 refers to the scrap material located within the product boundary contour and used for processing process holes such as heat dissipation holes, car logo mounting holes, or lock holes; for example, for the outer panel of the engine hood, the scrap material 011 in the middle is used for processing car logo mounting holes.

[0040] In this application, the positioning and feeding structure is as follows: Figures 3 to 9 As shown, it includes a punching punch 21, a punching die 11, a locating pin assembly, a trolley 40, and a scrap channel 41, with the scrap channel 41 fixedly mounted on the trolley 40; wherein,

[0041] The punching die 11 is fixed on the lower die base 10 to support the part 01. The scrap 011 in the middle of the part 01 has a pre-punched positioning hole 012. It should be noted that the lower die base 10 shown in the figure is only a part of the lower die base, not the entire lower die base.

[0042] The positioning pin assembly includes a positioning part 31; the positioning pin assembly is mounted on the lower mold base 10 and can slide vertically on the lower mold base 10 so that the positioning part 31 of the positioning pin assembly enters or exits the positioning hole 012 of the part 01.

[0043] The trolley 40 is mounted on the lower mold base 10 and can slide back and forth on the lower mold base 10 so that the waste channel 41 on the trolley 40 can switch between the initial position and the working position; when the waste channel 41 is in the working position, the entrance of the waste channel 41 is located directly below the waste 011.

[0044] The punching punch 21 is fixed on the upper die base 20 and is used to cooperate with the punching die 11 to complete the punching of the waste material 011 in the middle of the part 01.

[0045] This application optimizes the position of the positioning hole 012 from the scrap area at the edge of part 01 to the scrap area in the middle of part 01, so as to avoid the positioning point from overlapping and interfering with the flanged area around the part, thereby ensuring that part 01 can complete the flanged process under reliable positioning constraints and effectively guaranteeing the flanged quality. In addition, this application integrates the positioning flanged mode and the scrap punching mode into a set of molds, and realizes flexible switching between the hole positioning mode and the scrap punching discharge mode by adjusting the position of the positioning pin assembly and the scrap channel 41. This solution, which integrates the two functional modes into a set of molds, has the advantages of lower cost and higher processing efficiency compared with the traditional solution of developing molds for the two functional modes separately.

[0046] It should be noted that the vertical sliding of the positioning pin assembly can be achieved by a first linear movement component such as a cylinder or an electric push rod, or by a scheme in which the upper mold base 20 is driven to move downward and the elastic element is reset to move upward. There is no limitation on this. In order to reduce the difficulty of control and cost, this embodiment preferably adopts the scheme in which the upper mold base 20 is driven to move downward and the elastic element is reset to move upward.

[0047] Specifically, such as Figure 3 , Figures 6 to 9 As shown, a drive seat 22 is fixedly mounted on the upper mold base 20, and a first elastic reset member 12 is provided between the positioning pin assembly and the lower mold base 10. The first elastic reset member 12 is a spring, a nitrogen cylinder, or an elastic sleeve made of elastic materials such as rubber. The positioning pin assembly includes a pressed part 32 that cooperates with the drive seat 22, and the pressed part 32 is fixedly connected to the positioning part 31 through a transition part 33. When the upper mold base 20 drives the drive seat 22 to move downward, the drive seat 22 presses the pressed part 32 to make the positioning pin assembly move downward as a whole, thereby causing the positioning part 31 to exit the positioning hole 012. During this process, the first elastic reset member 12 is compressed to generate a reset force that makes the positioning pin assembly move upward.

[0048] To ensure the stability of the vertical sliding of the locating pin assembly, the locating pin assembly and the lower mold base 10 are slidably connected through the first guide structure.

[0049] It is understood that the first guiding structure includes, but is not limited to, the following two structural forms:

[0050] Structural Form 1:

[0051] like Figure 6 and Figure 9 As shown, the first guide structure includes a vertical sliding hole on the lower mold base 10 and a vertical slide block 35 slidably disposed in the vertical sliding hole; the vertical slide block 35 is fixed on the adapter 33 and located directly below the pressed part 32.

[0052] Structural Form Two:

[0053] like Figure 6 and Figure 9 As shown, the first guiding structure includes a vertical guide rod 34 and a guide sleeve 341 that slide in the vertical direction; wherein, the vertical guide rod 34 is fixed on the adapter 33 and located directly below the positioning part 31; the guide sleeve 341 is fixed on the lower mold base 10.

[0054] In this embodiment, the first guiding structure preferably adopts a combination of the above-mentioned structural form one and structural form two; at this time, the first elastic reset member 12 is provided at the vertical slide 35 to apply an upward reset force to the vertical slide 35.

[0055] In an alternative embodiment, such as Figure 6 and Figure 9 As shown, the vertical slide 35 has a first stop 351, and the lower mold base 10 is provided with a first limiting member 14; the first limiting member 14 is used to cooperate with the first stop 351 to limit the upward movement of the vertical slide 35, so as to ensure that the positioning pin assembly can move smoothly to the initial positioning position and avoid excessive upward movement.

[0056] In this application, the forward and backward sliding of the trolley 40 can be achieved by a second linear motion component such as a cylinder or an electric push rod, or by a scheme of driving the upper mold base forward and resetting and moving backward in other ways. There is no limitation on this. In order to reduce the difficulty and cost of control, this embodiment preferably adopts the scheme of driving the upper mold base forward and resetting and moving backward in other ways.

[0057] Specifically, such as Figure 3 , Figure 8 and Figure 9 As shown, the upper mold base 20 is provided with a drive inserter 23, and the drive inserter 23 is provided with a drive inclined surface 231 that slopes downward from front to back; the trolley 40 is provided with a driven inserter 42, and the driven inserter 42 is provided with a driven inclined surface 421 that cooperates with the drive inclined surface 231; when the upper mold base 20 drives the drive inserter 23 to move downward, the drive inclined surface 231 of the drive inserter 23 contacts the driven inclined surface 421 of the driven inserter 42, and the trolley 40 moves forward through the cooperation of the two inclined surfaces, so that the waste channel 41 on the trolley 40 moves from the initial position to the working position.

[0058] Furthermore, to ensure the stability of the trolley 40's forward and backward sliding, the trolley 40 and the lower mold base 10 are slidably connected via a second guide structure; such as Figure 5 As shown, the second guide structure includes a horizontal slider 43 and a horizontal slide rail 431 that are configured to cooperate; one of the horizontal slider 43 and the horizontal slide rail 431 is disposed on the lower mold base 10, and the other is disposed on the trolley 40.

[0059] It is understood that the rearward repositioning of the trolley 40 can be achieved either manually or automatically by the second elastic reset member 13, and there is no limitation on this; in this embodiment, as Figure 9 and Figure 11 As shown, the rearward reset of the trolley 40 is preferably achieved by the second elastic reset member 13. At this time, the driving insert 23 has a vertical front side 232 connected to the upper end of the driving inclined surface 231, and the driven insert 42 has a vertical rear side 422 connected to the lower end of the driven inclined surface 421. Thus, when the waste channel 41 moves forward to the working position, as the driving insert 23 moves downward, the vertical front side 232 of the driving insert 23 will contact the vertical rear side 422 of the driven insert 42, so as to prevent the trolley 40 from moving backward, ensuring that the waste channel 41 can be stably maintained at the working position during the waste punching process, and realizing the smooth discharge of waste.

[0060] It should be noted that the second elastic reset member 13 is a spring, a nitrogen cylinder, or an elastic sleeve made of elastic materials such as rubber, and there is no limitation thereto; in this embodiment, the second elastic reset member 13 is preferably a spring.

[0061] In a preferred implementation, such as Figure 4and Figure 9 As shown, the front end of the trolley 40 is provided with a horizontal guide rod 15, and the lower mold base 10 is provided with a horizontal sliding hole that cooperates with the horizontal guide rod 15; the second elastic reset member 13 is sleeved on the horizontal guide rod 15, and the two ends of the second elastic reset member 13 abut against the trolley 40 and the lower mold base 10 respectively; the setting of the horizontal guide rod 15 can ensure that the second elastic reset member 13 can only extend and retract, but cannot twist, thus ensuring the service life of the second elastic reset member 13.

[0062] To prevent the second elastic restoring member 13, made of steel, from suddenly breaking and sputtering debris during fatigue compression, such as... Figure 3 As shown, a protective plate 17 is provided on the lower mold base 10, and the protective plate 17 is located above the second elastic reset member 13.

[0063] In a further embodiment, a second stop 16 is provided on the horizontal guide rod 15. The second stop 16 is used to cooperate with the lower mold base 10 to limit the backward movement of the trolley 40 and avoid excessive reset.

[0064] Because the forward and backward movement path of the trolley 40 intersects with the vertical movement path of the positioning pin assembly, in order to avoid interference between the two, such as Figure 4 and Figure 5 As shown, the trolley 40 is provided with a clearance space 40a for the movement of the positioning pin assembly.

[0065] In a further embodiment, such as Figures 7 to 9 As shown, the positioning and feeding structure includes a pressure block 24 that presses part 01 onto the punching die 11; wherein, the pressure block 24 is fixed on a pressure plate 241, the pressure plate 241 is vertically slidably disposed within the upper die base 20, and the pressure plate 241 is connected to the upper die base 20 via a nitrogen spring 242; vertical grooves 251 are symmetrically arranged on both sides of the pressure plate 241, and a horizontal positioning pin 25 is provided on the inner wall of the upper die base 20 to cooperate with the vertical grooves 251, thereby locating the part 01 onto the punching die 11. The cooperation between the locating pin 25 and the vertical slide 251 ensures the sliding stability of the pressure plate 241. In addition, the bottom of the vertical slide 251 can cooperate with the horizontal locating pin 25 to limit the lowest stroke position of the pressure plate 241, preventing the pressure plate 241 from detaching from the upper die holder 20 under its own weight. The pressure block 24 is provided with a clearance opening to avoid the punching punch 21, so as to ensure that the punching punch 21 can pass smoothly through the pressure block 24 and cooperate with the punching die 11 to complete the scrap punching.

[0066] Of course, in other embodiments, the pressure block 24 can also be directly and vertically slidably disposed in the upper mold base 20 and connected to the upper mold base 20 by a nitrogen spring 242.

[0067] This invention also provides a positioning and feeding method, which is implemented through the above-described positioning and feeding structure. The positioning and feeding method includes:

[0068] Place part 01 on the automotive body panel mold, so that the positioning part 31 of the positioning pin assembly is inserted into the positioning hole 012 at the scrap part in the middle of the part.

[0069] like Figure 7 and Figure 9 As shown, the upper die holder 20 drives the drive seat 22, the drive cutter 23 and the punching punch 21 to move down together. The drive seat 22 first contacts the positioning pin assembly, causing the positioning part 31 of the positioning pin assembly to move down and exit the positioning hole 012.

[0070] like Figure 7 , Figure 10 and Figure 11 As shown, the upper mold base 20 continues to move downward, so that the drive cutter 23 and the driven cutter 42 cooperate to push the trolley 40 and the waste channel 41 forward together; during this process, the drive base 22 continuously presses down the positioning pin assembly, so that the positioning part 31 of the positioning pin assembly makes way for the forward movement of the waste channel 41, thereby allowing the waste channel 41 to smoothly reach the working position.

[0071] like Figure 7 and Figure 12 As shown, the upper die holder 20 continues to move downward, so that the punching punch 21 and the punching die 11 cooperate to complete the scrap punching and discharge the scrap through the scrap channel 41; during this process, the trolley 40 remains in the working position and the drive seat 22 continuously presses down the positioning pin assembly.

[0072] When the upper die holder 20 moves the drive seat 22, drive cutter 23 and punching punch 21 upward together, the positioning pin assembly and the trolley 40 will return to their initial positions under the action of the corresponding elastic reset member, preparing for the processing of the next part 01.

[0073] In summary, this application optimizes the positioning hole location at the scrap area in the middle of the part to avoid overlap and interference between the positioning point and the flanging area around the part, ensuring that part 01 can complete flanging under reliable positioning constraints and effectively guaranteeing flanging quality. In addition, this application integrates the scrap punching action at the positioning hole into the final flanging and forming die, and can switch between hole positioning mode and scrap punching discharge mode by adjusting the position of the positioning pin assembly and the scrap channel 41, so that part 01 can directly punch and discharge the scrap at the positioning hole after positioning and flanging actions. Since there is no need to set up an additional scrap punching die, the die cost is reduced, the handling time during part processing is reduced, and the part processing efficiency is improved.

[0074] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A positioning and stripping structure for an automotive panel mold, characterized by, The punch die (11) is located in the lower die seat (10), and the punch convex die (21) is located in the upper die seat (20); the punch convex die (21) and the punch die (11) cooperate to punch the waste (011) in the middle part of the part (01), and the punched waste (011) is provided with a positioning hole (012); the lower die seat (10) is provided with a positioning pin assembly and a trolley (40); the positioning pin assembly comprises a positioning part (31), and the positioning pin assembly can reciprocate in the vertical direction to make the positioning part (31) enter or exit the positioning hole (012); the trolley (40) is provided with a waste channel (41), and the trolley (40) can reciprocate in the front-rear direction to switch the waste channel (41) between the initial position and the working position.

2. The positioning and dispensing structure according to claim 1, wherein, The upper die seat (20) is provided with a driving seat (22), and a first elastic reset member (12) is arranged between the positioning pin assembly and the lower die seat (10); the positioning pin assembly comprises a pressed part (32), and the pressed part (32) is fixedly connected with the positioning part (31) through a transfer part (33); when the upper die seat (20) drives the driving seat (22) to move downward, the driving seat (22) presses the pressed part (32), so that the positioning part (31) exits the positioning hole (012).

3. The positioning and dispensing structure of claim 2, wherein, The upper die seat (20) is provided with a driving insert (23), and the trolley (40) is provided with a driven insert (42); when the upper die seat (20) drives the driving insert (23) to move downward, the driving insert (23) and the driven insert (42) cooperate to push the trolley (40) to move forward, so that the waste channel (41) on the trolley (40) moves from the initial position to the working position.

4. The positioning and dispensing structure according to claim 3, wherein, The lower die seat (10) is provided with a second elastic reset member (13) for resetting the trolley (40).

5. The positioning and dispensing structure of claim 3, wherein, The positioning and discharging structure comprises a pressing block (24) for pressing the part (01) on the punch die (11); the pressing block (24) is connected with the upper die seat (20) through a nitrogen spring (242), and the pressing block (24) is provided with an avoiding opening for avoiding the punch convex die (21).

6. The positioning and dispensing structure according to any one of claims 1 to 5, wherein, The positioning pin assembly and the lower die seat (10) are connected through a first guide structure for sliding; the trolley (40) and the lower die seat (10) are connected through a second guide structure for sliding.

7. The positioning and dispensing structure of claim 4, wherein, The lower die seat (10) is provided with a protective plate (17); the protective plate (17) is used for shielding the debris splashed when the second elastic reset member (13) is damaged.

8. The positioning and dispensing structure of claim 1, wherein, The positioning pin assembly is driven by a first linear movement assembly, and / or the trolley (40) is driven by a second linear movement assembly.

9. A positioning and discharging method, which is implemented by the positioning and discharging structure according to claim 3, characterized in that, The positioning and discharging method comprises: Placing the part (01) on the automobile cover mold, and inserting and cooperating the positioning part (31) of the positioning pin assembly with the positioning hole (012) at the waste position in the middle part of the part (01); The upper die seat (20) drives the driving seat (22), the driving insert (23) and the punch convex die (21) to move downward together, the driving seat (22) first contacts the positioning pin assembly, the positioning part (31) of the positioning pin assembly moves downward and exits the positioning hole (012); The upper die holder (20) continues to move down, so that the driving insert (23) cooperates with the driven insert (42) to push the trolley (40) and the waste passage (41) to move forward; in this process, the driving seat (22) continuously presses the positioning pin assembly to make the waste passage (41) smoothly reach the working position; The upper die holder (20) continues to move down, so that the punching male die (21) cooperates with the punching female die (11) to complete the waste punching, and the waste is discharged through the waste passage (41); in this process, the position of the trolley (40) remains unchanged, and the driving seat (22) continuously presses the positioning pin assembly.

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