Punching die for [-shaped opening piece
By designing a punching mold for moving the down-pressure core and floating mould, the problems of blockage of punching waste in the shaped opening parts and the difficulty of operating, achieving efficient punching operation and accurate bottom plate punching, improving production efficiency and quality.
Patent Information
- Application Number
- CN202420217338.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-30
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-01-30
AI Technical Summary
Existing oblique down punching dies are prone to blockage of punching waste and difficult operation when stamping car-shaped openings, which affects mass production efficiency.
Design a punching mold for a shaped opening, and move the downward core to allow the punch on the floating mould to enter the shaped opening, so as to realize the downward punch of the bottom plate, avoid plugging of the socket, and pass through the rotating base and elastic elements avoid interference and rebound problems.
It effectively avoids blockage of punching waste, reduces operation difficulty, improves punching accuracy and production efficiency, and ensures the punching quality of the shaped opening parts.
Smart Images
Figure CN222307045U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of punching dies, and particularly relates to a punching die for a U-shaped opening part. Background Art
[0002] In the manufacturing process of automobile sheet metal parts, it is often necessary to use a punching die to perform punching operations on the side of the workpiece. However, for U-shaped opening parts such as the outer panel of the rear cover, which is mainly composed of a top plate, a bottom plate, and a back plate for connecting the top plate and the bottom plate, it has the characteristic of complex shape. Since the current obliquely downward punching die will interfere with the top plate of the U-shaped opening part during stamping, an obliquely upward punching die is usually used to punch the bottom plate of the U-shaped opening part. However, this punching method is not conducive to the discharge of punching waste, and it is very easy to出现 the situation of blockage of the jack on the punching die. It needs to be cleaned before it can be used continuously, which not only increases the labor intensity of the operator, but also affects the punching cycle of batch U-shaped opening parts. Content of the Utility Model
[0003] In view of the above disadvantages of the prior art, the purpose of the utility model is to provide a punching die for a U-shaped opening part, which makes the punch on the floating punch enter the U-shaped opening part by moving the downward pressure core, and then completes the downward punching action of the bottom plate inside the U-shaped opening part by the downward movement of the floating punch, effectively avoiding the occurrence of the situation of jack blockage.
[0004] To achieve the above and other related objectives, the present utility model provides a punching die for a U-shaped opening part, which includes a lower die base, an upper die base, a punching female die, and a punch head; the U-shaped opening part includes a top plate, a back plate, and a bottom plate connected in sequence; the lower die base is provided with a downward pressure core that reciprocally slides in a first direction and a floating punch that reciprocally slides in a second direction, and the first direction is perpendicular to the second direction; the downward pressure core is used to support the top plate of the U-shaped opening part, and a positioning device for pressing the back plate against the downward pressure core is provided on one side of the downward pressure core close to the floating punch; a punch avoidance opening is provided on one side of the downward pressure core close to the floating punch; the punching female die is used to support the bottom plate of the U-shaped opening part; the punch head is installed on the floating punch and cooperates with the punching female die to complete the punching of the bottom plate; the downward pressure core is driven by a driving device to reciprocate, so that the punch head on the floating punch enters or exits the U-shaped opening part; the upper die base is provided with a punch driving part for driving the floating punch to move, and a driving arm that cooperates with the punch driving part is provided on the floating punch; the lower die base is provided with a first elastic element for floating and resetting the floating punch; in the initial state, the downward pressure core is in the material discharging state under the action of the driving device, and the floating punch is in the floating state under the action of the first elastic element; during punching, the U-shaped opening part needs to be placed on the downward pressure core first, and the U-shaped opening part is pressed and positioned on the downward pressure core by using the positioning device; then, the driving device is used to move the downward pressure core from the material discharging position to the working position, so that the punch head on the floating punch enters the U-shaped opening part and aligns with the jack of the punching female die; then, the upper die base moves downward, and the punch driving plate will contact the floating punch to make the floating punch move in the direction close to the lower die base, so that the punch head on the floating punch approaches the punching female die to complete the downward punching of the bottom plate of the U-shaped opening part; in this application, the reciprocating sliding of the downward pressure core is used to make the punch head enter or exit the U-shaped opening part, and the floating of the floating punch is used to drive the punch head to move in the U-shaped opening part to achieve the downward punching of the bottom plate of the U-shaped opening part, which not only avoids the problem that the punching waste is easily blocked in the punching female die, but also solves the problem that the U-shaped opening part is easily interfered with the floating punch and is not easy to pick up and place the material.
[0005] Preferably, a rotating base is rotatably installed on the lower die base, and the punching female die is located on one side of the rotating base close to the floating punch; a base driven plate is provided on the side of the rotating base away from the punching female die, and the downward swing amplitude of the base driven plate is limited; a second elastic element is provided below the base driven plate, and the second elastic element applies a force towards the upper die base to the base driven plate; a nitrogen spring for driving the base driven plate to swing downward is provided on the upper die base; by driving the punching female die to rotate through the rotating base so that the punching female die rotates between the material supporting position and the avoidance position, the interference problem between the U-shaped opening part and the punching female die is effectively avoided, and the smooth progress of the punching action is ensured.
[0006] Preferably, a floating pressure plate for pressing the bottom plate is provided on the floating punch; a plurality of third elastic elements are provided between the floating pressure plate and the floating punch, and a punch through-hole is provided on the floating pressure plate; the bottom plate of the C-shaped opening part is clamped by the floating pressure plate and the punching die that has rotated in place, effectively avoiding the problem of punching out-of-tolerance caused by part springback and improving punching accuracy.
[0007] Preferably, a plurality of guide rods extending in the second direction are provided on the floating punch; the floating pressure plate is slidably mounted on each guide rod, and a third elastic element is sleeved on each guide rod; effectively avoiding the deflection of the floating pressure plate and improving the sliding stability of the floating pressure plate.
[0008] Preferably, the driving device includes a wedge driving block located on the upper die base, a wedge driven block located on the lower pressure core, and a fourth elastic element located on the lower die base; the wedge driving block and the wedge driven block cooperate to drive the lower pressure core to move, so that the punch on the floating punch enters the C-shaped opening part and aligns with the jack on the punching die; the fourth elastic element is used to drive the lower pressure core to reset; since the wedge driving block is connected to the upper die base and does not require separate control, the operation convenience of the punching die is effectively improved.
[0009] Preferably, an upper pressure core for cooperating with the lower pressure core to press the material is provided on the upper die base; the upper end of the upper pressure core is connected to the upper die base through a second nitrogen spring; the top plate of the C-shaped opening part is clamped by the upper pressure core and the lower pressure core to ensure the stability of the C-shaped opening part during the punching process.
[0010] Preferably, the positioning device includes a positioning block and a linear driving device for driving the positioning block to reciprocate in the first direction.
[0011] Preferably, a driving arm is provided on the floating punch, and a punch driven plate for cooperating with the punch driving plate is provided on the driving arm.
[0012] Preferably, a socket is fixedly installed on the lower die base, and the rotating base is rotatably installed in the socket; a base limiting surface for cooperating with the lower surface of the base driven plate is provided on one side of the socket close to the base driven plate, and the downward swing amplitude of the base driven plate is limited by the base limiting surface.
[0013] Preferably, a material passing hole is provided on the rotating base to guide and collect the waste material cut out.
[0014] As above, a punching die for a C-shaped opening part of the present utility model has the following beneficial effects:
[0015] The utility model uses a positioning device to position the U-shaped opening part on the lower pressure pad, and then through the reciprocating movement of the lower pressure pad, the punch on the floating punch enters or exits the U-shaped opening part, so as to facilitate the subsequent movement of the punch in the U-shaped opening part to complete the punching action; since the punching action of the punch is completed inside the U-shaped opening part, it actually belongs to downward punching, effectively avoiding the occurrence of the situation where the punching waste blocks the jack; in addition, before the formal stamping, the bottom plate clamping the U-shaped opening part is first pressed tightly on the punching die that has rotated in place by the floating pressure plate, so that the bottom plate is completely attached to the punching die, effectively avoiding the punching tolerance problem caused by the bottom plate rebounding and being unable to be completely attached to the punching die, and ensuring the punching quality. Description of the Drawings
[0016] Figure 1 It is a perspective view of the U-shaped opening part from the first perspective.
[0017] Figure 2 It is a perspective view of the U-shaped opening part from the second perspective.
[0018] Figure 3 It is a schematic diagram of the upper and lower die matching of the punching die in the embodiment of the utility model.
[0019] Figure 4 It is a perspective view of the lower die in the embodiment of the utility model.
[0020] Figure 5 It is a top view of the lower die in the embodiment of the utility model.
[0021] Figure 6 It is an exploded view of the lower die in the embodiment of the utility model.
[0022] Figure 7 It is a schematic diagram of the connection between the lower pressure pad and the positioning support arm in the embodiment of the utility model.
[0023] Figure 8 It is a perspective view of the U-shaped opening part positioned on the lower pressure pad.
[0024] Fig. 9 It is a schematic diagram of the cooperation between the floating punch, the punch and the floating pressure plate in the embodiment of the utility model.
[0025] Fig.10 It is an exploded view of the punch and the floating pressure plate in the embodiment of the utility model.
[0026] Fig.11 It is a partial cross-sectional view of the lower die in the embodiment of the utility model (the U-shaped opening part is not shown).
[0027] Fig.12 It is a structural schematic diagram of the upper die in the embodiment of the utility model (looking from bottom to top).
[0028] Description of the Reference Numerals
[0029] C-shaped opening member 01, top plate 011, back plate 012, bottom plate 013, lower die base 1, first elastic element 11, fourth elastic element 12, upper die base 2, punch driving member 21, first nitrogen spring 22, wedge driving block 23, upper blank holder 24, lower blank holder 3, punch avoiding opening 3a, wedge driven block 31, positioning support arm 32, floating punch 4, driving arm 41, floating blank holder plate 42, third elastic element 43, guide rod 44, positioning device 5, positioning block 51, positioning driving device 52, rotating base 6, material passing hole 6a, base limiting plate 61, second elastic element 611, punching die 7, punch 8, socket 9, blank discharging opening 9a, second base limiting member 91. Detailed Embodiment
[0030] The following specific embodiments illustrate the implementation manners 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.
[0031] Please refer to Figures 1 to 12 . It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have any technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of clear narration, rather than used to limit the scope for the implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope for the implementation of the present invention.
[0032] In the field of automobile manufacturing, there are some automobile sheet metal parts with special shapes, such as the outer back cover with a C-shaped opening. Now, these parts with a C-shaped opening are defined as C-shaped opening members 01. As Figure 1 and Figure 2 shown, the C-shaped opening member 01 includes a top plate 011, a back plate 012 and a bottom plate 013 which are sequentially connected. Due to the obstruction of the top plate 011, it is impossible to use a conventional downward punching die for punching the bottom plate. Therefore, how to overcome the obstruction of the top plate 011 to complete the downward punching of the bottom plate 013 is a technical problem亟待解决 (urgently to be solved) in this application.
[0033] For the convenience of description, when positioning the U-shaped opening part 01 on the punching die in this application, the width direction of the bottom plate 013 is defined as the first direction, the thickness direction of the bottom plate 013 is defined as the second direction, and the length direction of the bottom plate 013 is defined as the third direction. Based on this, Figure 2 the X direction in Figure 2 is the first direction, Figure 2 the Z direction in
[0034] Example 1
[0035] As shown in Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 7 , Figure 8 , Fig. 9 and Fig.12 This Example 1 provides a punching die for a U-shaped opening part, which includes a lower die base 1, an upper die base 2, a lower pressure pad core 3, a floating punch 4, a punching die cavity 7 and a punch 8; the punching die cavity 7 is used to support the bottom plate 013 of the U-shaped opening part 01 and cooperate with the punch 8 to complete the bottom plate punching action.
[0036] Among them, the lower pressure pad core 3 is installed on the lower die base 1 and can slide back and forth along the first direction under the action of a driving device, so that the lower pressure pad core 3 can be switched between the material feeding position and the working position; the punch 8 is installed on the floating punch 4, and the floating punch 4 can float up and down along the second direction on the lower die base 1 to drive the punch 8 to move to achieve the punching action; specifically, a punch driving part 21 is provided on the upper die base 2, and a driving arm 41 cooperating with the punch driving part 21 is provided on the floating punch 4; when the upper die base 2 drives the punch driving part 21 to move downward, the punch driving part 21 contacts the driving arm 41 to drive the floating punch 4 to move downward along the second direction; a first elastic element 11 for floating the floating punch 4 up and resetting is provided on the lower die base 1, and the first elastic element 11 preferably adopts a nitrogen spring; in this example, the driving device is an existing linear driving device such as a cylinder or an electric push rod, and no limitation is made thereto.
[0037] The lower pressure pad core 3 is used to support the top plate 011 of the U-shaped opening part 01, and a positioning support arm 32 is provided on the rear side of the lower pressure pad core 3 (i.e., the side close to the floating punch 4), and a positioning device 5 for pressing the back plate 012 against the lower pressure pad core 3 is installed on the positioning support arm 32; through the cooperation of the lower pressure pad core 3 and the positioning device 5, the U-shaped opening part 01 is stably positioned on the lower pressure pad core 3 to prevent it from moving and shifting during subsequent actions and affecting the accuracy of the punching position.
[0038] On the rear side of the lower blank holder 3 (i.e., the side close to the floating punch 4), there is a punch avoidance opening 3a for the floating punch 4 to float up and down in the second direction. The setting of the punch avoidance opening 3a can effectively prevent the lower blank holder 3 from interfering with the floating punch 4 during movement, ensuring that the punch 8 on the floating punch 4 can be free from the interference of the top plate 011 and smoothly enter or exit the U-shaped opening part 01. At the same time, when the punch 8 enters the U-shaped opening part 01, if the floating punch 4 floats up and down in the second direction within the punch avoidance opening 3a, the punch 8 will also move up and down in the second direction within the U-shaped opening part 01, thus facilitating the punching operation of the bottom plate 013 within the U-shaped opening part 01.
[0039] When punching the bottom plate 013 of the U-shaped opening part 01 is required, first use the driving device to move the lower blank holder 3 to the blank feeding position. Then, place the U-shaped opening part 01 on the lower blank holder 3, making the back plate 012 of the U-shaped opening part 01 located at the rear side of the lower blank holder 3, and the top plate 011 of the U-shaped opening part 01 fit with the top surface of the lower blank holder 3 (as Figure 8 shown). Next, extend the positioning device 5 to position and clamp the back plate 012 of the U-shaped opening part 01 on the lower blank holder 3 to complete the blank feeding operation. Move the lower blank holder 3 forward along the first direction to the working position through the driving device, so that the U-shaped opening part 01 and the punch 8 on the floating punch 4 generate relative movement in the first direction, enabling the punch 8 to smoothly enter the U-shaped opening part 01 and align with the punching position of the bottom plate 013. The upper die holder 2 moves downward, making the punch driving part 21 contact with the driving arm 32 to drive the floating punch 4 to move downward in the second direction. Since the punch 8 is fixedly connected to the floating punch 4, the punch 8 will move downward with the floating punch 4 to complete the downward punching operation of the bottom plate 013. During this process, the first elastic element 11 is continuously compressed. After punching is completed, the upper die holder 2 drives the punch driving part 21 to move upward and reset. The floating punch 4 moves upward and resets in the second direction under the action of the first elastic element 11, separating the punch 8 from the bottom plate 013. The lower blank holder 3 retreats along the first direction to the blank feeding position, enabling the punch 8 to exit from the U-shaped opening part 01 to avoid interference between the U-shaped opening part 01 and the punch 8 during part taking.
[0040] Since the bottom plate 013 of the U-shaped opening member 01 is obtained through a flanging process, there will inevitably be a certain amount of springback after the flanging is completed (i.e., the free end of the bottom plate 013 springs back in a direction away from the top plate 011); if the punching die 7 is directly fixedly installed on the lower die base 1, in order to avoid interference between the bottom plate 013 of the U-shaped opening member 01 on the lower pressure core 3 during its movement and the punching die 7, resulting in the problem that the punch 8 cannot smoothly enter the U-shaped opening member 01, the installation position of the punching die 7 must be appropriately lowered; that is to say, when the lower pressure core 3 moves to the working position, there must be a certain gap between the bottom plate 013 of the U-shaped opening member 01 and the punching die 7; in this way, when the punch 8 punches downward along the second direction, it will inevitably first deform the bottom plate 013 until it contacts the punching die 7 before performing the punching operation on the bottom plate 013, which not only easily causes surface damage to the bottom plate 013 but also极易出现冲孔超差问题,影响冲孔品质。
[0041] Based on this, as Figure 4 、 Figure 5 、 Figure 6 、 Fig.11 and Fig.12 shown, in this embodiment, a rotating base 6 is further installed on the lower die base 1. The rotation axis of the rotating base 6 is the third direction, and the third direction is perpendicular to both the first direction and the second direction; the punching die 7 is located on the side of the rotating base 6 close to the floating punch 4, and a base driven plate 61 is provided on the side of the rotating base 6 away from the punching die 7; a first base limiting member and a second elastic element 611 are provided below the base driven plate 61. The second elastic element 611 can be various elastic components such as a telescopic positioning pin, a spring, an elastic sleeve (made of elastic materials such as rubber and silica gel), etc., and no limitation is made in this regard; among them, the first base limiting member is used to limit the downward swing amplitude of the base driven plate 61. When the base driven plate 61 swings downward to the position where it contacts the first base limiting member, it indicates that the punching die 7 on the rotating base 6 has rotated to the working position; the second elastic element 611 exerts an upward force on the base driven plate 61; a first nitrogen spring 22 for driving the base driven plate 61 to swing downward is provided on the upper die base 2.
[0042] In the initial state, the second elastic element 611 is in an extended state, so that the punching female die 7 is located below the moving path of the U-shaped opening part 01, ensuring that when the lower pressure core 3 moves back and forth in the first direction, the U-shaped opening part 01 thereon will not interfere with the punching female die 7; after the lower pressure core 3 moves to the working position, the upper die base 2 moves downward. During the downward movement of the upper die base 2, the first nitrogen spring 22 first contacts the base driven plate 61, causing the base driven plate 61 to swing downward. During this process, the second elastic element 611 is continuously compressed, and the punching female die 7 continuously swings upward close to the bottom plate 013 of the U-shaped opening part 01; when the base driven plate 61 contacts the first base limiting part, the base driven plate 61 cannot continue to swing downward, and the punching female die 7 rotates to the working position and contacts the bottom plate 013 of the U-shaped opening part 01; the upper die base 2 continues to move downward, and the punch driving part 21 contacts the driving arm 32 to drive the floating punch 4 and the punch 8 to move downward together in the second direction to complete the downward punching action of the bottom plate 013. During this process, the first nitrogen spring 22 and the first elastic element 11 will be continuously compressed; when the upper die base 2 moves upward and resets, the floating punch 4 first floats under the action of the first elastic element 11, and then the base driven plate 61 swings upward under the action of the second elastic element 611, causing the punching female die 7 to rotate below the moving path of the U-shaped opening part 01, and finally driving the lower pressure core 3 to retreat to the material placing position to remove the punched U-shaped opening part 01.
[0043] By changing the fixed setting of the punching female die 7 to a rotating setting, the deformation amplitude of the bottom plate 013 during punching can be effectively restricted, thereby alleviating the surface pressing injury problem and the punching out-of-tolerance problem during punching of the springback parts, and effectively improving the punching quality of the U-shaped opening part 01.
[0044] The punching female die 7 can be cantilever-mounted on the rotating base 6 to ensure that the rotating base 6 does not block the jack of the punching female die 7; although this layout can ensure the smooth discharge of the punching waste, during the punching process, the punching female die 7 is extremely prone to bending deformation and has a low service life; in order to prevent the punching female die 7 from bending deformation during the punching process, the punching female die 7 needs to be completely placed on the rotating base 6, and a material passing hole 6a needs to be provided on the rotating base 6. The upper end of the material passing hole 6a is communicated with the jack of the punching female die 7 to guide the punching waste outside the rotating base 6.
[0045] Preferably, as Figure 6 and Fig.11As shown in the figure, a socket 9 is fixedly installed on the lower die base 1; the rotating base 6 is rotatably installed in the socket 9; an installation hole for installing the second elastic element 611 is provided on the side wall of the socket 9 near one side of the base driven plate 61, and the top end of the second elastic element 611 extends out of the installation hole and contacts the lower surface of the base driven plate 61; the first base limiting member is a base limiting surface provided on the socket 9; the base limiting surface is located on one side of the socket 9 near the base driven plate 61 and cooperates with the lower surface of the base driven plate 61 to limit the downward swing amplitude of the base driven plate 61.
[0046] If the lower surface of the rotating base 6 never contacts the inner bottom surface of the socket 9, the socket 9 can act as a waste collector for collecting the punching waste discharged from the material passing hole 6a of the rotating base 6; however, in this structure, the rotating base 6 is completely supported by the rotating shaft in the socket 9, and it is difficult to ensure the rotation accuracy; in order to ensure the rotation accuracy of the rotating base 6, the lower surface of the rotating base 6 and the inner bottom surface of the socket 9 are both arc-shaped surfaces, and the two are in sliding fit; in order to reduce the sliding friction, lubricating oil can be added to the rotating base 6; at this time, a material discharging port 9a communicating with the material passing hole 6a needs to be opened at the bottom of the rotating base 6 (as Fig.11 shown); a waste collector can be equipped below the material discharging port 9a.
[0047] Preferably, as Fig.11 shown, a second base limiting member 91 is further provided on the socket 9, and the second base limiting member 91 is used to limit the upward swing amplitude of the base driven plate 61; in this embodiment, the second base limiting member 91 is integrally in the shape of a '7'.
[0048] Furthermore, as Figures 9 to 11 shown, a floating pressure plate 42 for pressing the bottom plate 013 is provided on the floating punch 4; a plurality of third elastic elements 43 are provided between the floating pressure plate 42 and the floating punch 4, and a punch through hole is provided on the floating pressure plate 42; in this way, when the floating punch 4 moves downward along the second direction, the floating pressure plate 42 will first contact the bottom plate 013 to press the bottom plate 013 against the punching die 7 until the bottom plate 013 is completely attached to the punching die 7. During this process, the third elastic elements 43 are continuously compressed; the floating punch 4 continues to move downward, and the punch 8 on the floating punch 4 will move downward to complete the punching action of the bottom plate 013; since the floating pressure plate 42 can first cooperate with the punching die 7 to reset the bottom plate 013 to the state before springback deformation and then perform the punching action, it effectively avoids the surface pressing injury problem and the punching out-of-tolerance problem during the punching of the U-shaped opening part 01 after springback, and ensures the punching quality of the U-shaped opening part 01; in this embodiment, the third elastic elements 43 are springs or elastic sleeves made of elastic materials such as rubber and silica gel.
[0049] Preferably, as Fig. 9 and Fig.10As shown, a plurality of guide rods 44 extending in the second direction are provided on the floating punch 4; the floating pressure plate 42 is slidably mounted on the guide rods 44; a third elastic element 43 is mounted on the guide rods 44 for applying a force to the floating pressure plate 42 away from the floating punch 4; the arrangement of the guide rods 44 can ensure the sliding stability of the floating pressure plate 42, thereby avoiding the phenomenon of the floating pressure plate 42 flipping during the blank holding process.
[0050] To further ensure the positioning stability of the C-shaped opening part 01, as Figure 5 and Fig.12 shown, an upper pressure core 24 for cooperating with the lower pressure core 3 to hold the material is provided on the upper die base 2; the upper end of the upper pressure core 24 is connected to the upper die base 2 through a second nitrogen spring.
[0051] As Figure 6 shown, the positioning device 5 includes a positioning block 51 and a positioning driving device 52 for driving the positioning block 51 to reciprocate in the first direction. The positioning driving device 52 is an existing linear driving mechanism such as a cylinder or an electric push rod, which is not limited herein. The positioning driving device in this embodiment preferably uses a cylinder.
[0052] As Figure 7 and Figure 8 shown, the positioning support arms 32 are preferably provided in two, and the two positioning support arms 32 are symmetrically arranged with respect to the avoidance opening 3a to ensure the positioning stability of the C-shaped opening part 01.
[0053] As Fig. 9 shown, the driving arms 41 are preferably provided in two, and the two driving arms 41 are symmetrically distributed with respect to the floating punch 4.
[0054] Embodiment 2
[0055] The difference between this embodiment and Embodiment 1 lies only in the driving device of the lower pressure core 3.
[0056] As Figure 6 、 Figure 7 、 Fig.11 and Fig.12As shown in the figure, the driving device includes a wedge driving block 23 located on the upper die base 2, a wedge driven block 31 located on the lower blank holding core 3, and a fourth elastic element 12 located on the lower die base 1. The fourth elastic element 12 is preferably a nitrogen spring. The wedge driving block 23 has a driving inclined surface, and the wedge driven block 31 is provided with a driven inclined surface that cooperates with the driving inclined surface. When the upper die base 2 moves downward, the wedge driving block 23 moves downward, and the driving inclined surface first contacts the driven inclined surface to drive the lower blank holding core 3 to move from the blank feeding position to the working position, so that the punch 8 on the floating punch 4 enters the U-shaped opening part 01. During this process, the fourth elastic element 12 is continuously compressed. When the upper die base 2 drives the wedge driving block 23 to move upward, the lower blank holding core 3 will reset to the blank feeding position under the action of the fourth elastic element 12. Since the driving force for the movement of the lower blank holding core 3 to the working position can be provided by the upper die base 2, there is no need to separately control the movement of the lower blank holding core 3, which not only reduces the control difficulty, but also improves the connection between the movement of the lower blank holding core 3 and the movement of subsequent components, thereby improving the punching process cycle.
[0057] The above embodiments are only illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.
Claims
1. A punching die for a C-shaped opening part, comprising a lower die base (1), an upper die base (2), a punching female die (7) and a punch (8); the C-shaped opening part (01) comprises a top plate (011), a back plate (012) and a bottom plate (013) which are connected in sequence; characterized in that, A lower die base (1) is provided with a downward pressure core (3) reciprocatingly sliding in a first direction and a floating punch (4) reciprocatingly sliding in a second direction, and the first direction is perpendicular to the second direction; the downward pressure core (3) is used to support a top plate (011) of a C-shaped opening part (01), and a positioning device (5) for pressing a back plate (012) against the downward pressure core (3) is arranged on one side of the downward pressure core (3) close to the floating punch (4); a punch avoiding opening (3a) is arranged on one side of the downward pressure core (3) close to the floating punch (4); a punching die (7) is used to support a bottom plate (013) of the C-shaped opening part (01); a punch (8) is installed on the floating punch (4) and cooperates with the punching die (7) to complete punching of the bottom plate; the downward pressure core (3) is driven by a driving device to reciprocate, so that the punch (8) on the floating punch (4) enters or exits the C-shaped opening part (01); a punch driving part (21) for driving the floating punch (4) to move is arranged on an upper die base (2), and a driving arm (41) cooperating with the punch driving part (21) is arranged on the floating punch (4); a first elastic element (11) for floating and resetting the floating punch (4) is arranged on the lower die base (1).
2. The punching die for a U-shaped opening part according to claim 1, characterized in that, A rotary base (6) is rotatably installed on the lower die base (1), and the punching die (7) is located on one side of the rotary base (6) close to the floating punch (4); a base driven plate (61) is arranged on the side of the rotary base (6) far from the punching die (7), and the downward swing amplitude of the base driven plate (61) is limited; a second elastic element (611) is arranged below the base driven plate (61), and the second elastic element (611) applies a force towards the upper die base (2) to the base driven plate (61); a first nitrogen spring (22) for driving the base driven plate (61) to swing downward is arranged on the upper die base (2).
3. The punching die for a U-shaped opening part according to claim 2, characterized in that, A floating pressure plate (42) for pressing the bottom plate (013) is arranged on the floating punch (4); a plurality of third elastic elements (43) are arranged between the floating pressure plate (42) and the floating punch (4), and a punch through hole is arranged on the floating pressure plate (42).
4. The punching die for a U-shaped opening part according to claim 3, characterized in that, A plurality of guide rods (44) extending in the second direction are arranged on the floating punch (4); the floating pressure plate (42) is slidably installed on each guide rod (44), and a third elastic element (43) is sleeved on each guide rod (44).
5. The punching die for a U-shaped opening part according to claim 1, characterized in that, The driving device includes an inclined wedge driving block (23) located on the upper die base (2), an inclined wedge driven block (31) located on the downward pressure core (3), and a fourth elastic element (12) located on the lower die base (1); the inclined wedge driving block (23) cooperates with the inclined wedge driven block (31) to drive the downward pressure core (3) to move, so that the punch (8) on the floating punch (4) enters the C-shaped opening part (01) and is aligned with a jack on the punching die (7); the fourth elastic element (12) is used to drive the downward pressure core (3) to reset.
6. A punching die for a C-shaped opening part according to any one of claims 1 to 5, characterized in that, An upper pressure pad core (24) for cooperating with the lower pressure pad core (3) to press the material is provided on the upper die base (2); the upper end of the upper pressure pad core (24) is connected to the upper die base (2) through a second nitrogen spring.
7. A punching die for a C-shaped opening part according to any one of claims 1 to 5, characterized in that, A positioning support arm (32) is provided on the lower pressure pad core (3); the positioning device (5) is installed on the positioning support arm (32) and is used for tightly positioning the back plate (012) of the U-shaped opening part (01).
8. The punching die for a U-shaped opening part according to claim 7, characterized in that, The positioning device (5) includes a positioning block (51) and a positioning driving device (52) for driving the positioning block (51) to reciprocate in the first direction.
9. The punching die for a C-shaped opening part according to claim 2, characterized in that, A socket (9) is fixedly installed on the lower die base (1), and the rotating base (6) is rotatably installed in the socket (9); a base limiting surface for cooperating with the lower surface of the base driven plate (61) is provided on one side of the socket (9) close to the base driven plate (61).
10. The punching die for a U-shaped opening part according to claim 9, characterized in that, A material passing hole (6a) is provided on the rotating base (6).