Quick replacement device for automobile stamping die

Abstract

The utility model relates to the technical field of stamping dies, in particular to a rapid replacement device of an automobile stamping die, which comprises an upper stamping plate and a lower stamping plate, the bottom of the upper stamping plate is fixedly connected with an upper die, and the top of the lower stamping plate is fixedly connected with a lower die. The cooling mechanism is arranged, circulating cooling liquid flows and makes direct contact with the inner wall of the lower die, heat generated by the die in the stamping process is effectively taken away, the temperature of the die is kept within a reasonable range, and die deformation or damage caused by too high temperature is avoided. The cooling liquid can be adjusted according to production requirements by accurately controlling the flow and the flow speed, it is ensured that the mold keeps stable temperature in different punching periods, and the phenomena of workpiece demolding difficulty, adhesion or clamping stagnation caused by high temperature are prevented. The dynamic adjustment can optimize the cooling effect according to the characteristics of different materials, ensure the appropriate temperature of the mold, improve the demolding efficiency and reduce the production problems caused by overheating.

Description

Technical Field

[0001] This utility model relates to the field of stamping die technology, specifically to a quick-change device for automotive stamping dies. Background Technology

[0002] Automotive stamping dies are tools used in the production of automotive parts. They process sheet metal into desired shapes through stamping. Stamping dies generally consist of an upper die and a lower die, and operate using equipment such as presses. Their main functions include cutting, forming, bending, drawing, and punching. In automotive manufacturing, stamping dies are commonly used for mass-produced components such as body panels, chassis, and doors. Die design must consider the product's structure, material properties, production efficiency, and die durability to ensure that parts meet expected quality standards during production.

[0003] During stamping, metal materials undergo plastic deformation under external forces, resulting in the conversion of mechanical energy into heat energy. This process causes the temperature of the die and workpiece to rise continuously. Especially under large deformation conditions, the heat energy generated during deformation increases significantly. For example, in deep drawing or bending operations, the interaction forces between atoms within the metal material change, releasing heat and exacerbating the temperature rise. As the degree of deformation increases, the temperature of the die and workpiece also gradually increases. The temperature change of the die and workpiece during stamping is non-uniform. In the initial stage of stamping, the temperature of the die and workpiece is usually low, and the die may be kept at a low temperature by a cooling system. However, as the workpiece is subjected to force, friction, and localized heating, the workpiece temperature gradually rises. Furthermore, as stamping progresses, the die continuously comes into contact with the high-temperature workpiece and absorbs heat, causing the die temperature to rise continuously. This temperature change has multifaceted effects on the die and workpiece. First, the die material undergoes plastic flow at high temperatures, causing minute plastic deformations on the die surface. Especially under prolonged high-temperature conditions, the die experiences repeated heating and cooling cycles. This thermal cycle intensifies the thermal stress of the die, causing stress concentration and potentially leading to localized permanent deformation. These deformations affect the fitting accuracy between the mold and the workpiece. During demolding, adhesion or jamming may occur between the mold and workpiece surfaces, increasing the difficulty of demolding. Secondly, high temperatures increase the plasticity of the metal material, which exacerbates the deformation of the mold surface. When the mold surface deforms, the working accuracy of the mold is affected, and slight changes in the mold's geometry may occur, leading to deviations in the size and shape of the workpiece. Such deviations not only affect the quality of the workpiece but also necessitate reducing the demolding speed to avoid adhesion or jamming, which in turn reduces production efficiency.

[0004] In view of this, we propose a quick change device for automotive stamping dies. Utility Model Content

[0005] The purpose of this utility model is to provide a quick-change device for automotive stamping dies. This quick-change device for automotive stamping dies solves the problem that during the stamping process, the plastic deformation of metal causes energy to be converted into heat energy, which raises the temperature of the die and the workpiece, thereby causing die deformation, fit errors and demolding difficulties, thus affecting product quality and production efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A quick-change device for automotive stamping dies includes an upper stamping plate and a lower stamping plate. An upper die is fixedly connected to the bottom of the upper stamping plate, and a lower die is fixedly connected to the top of the lower stamping plate. A cooling mechanism, an ejection mechanism, and a positioning mechanism are provided on the lower die. The cooling mechanism includes a water outlet pipe, one end of which is fixedly connected to the inner wall of the lower die, and the other end of which is fixedly connected to a fixing head. A water outlet head, a water inlet head, and a water inlet pipe are fixedly connected to the outer wall of the fixing head.

[0008] Preferably, a switch is provided on the outer wall of the water outlet head, and a switch is provided on the outer wall of the water inlet head.

[0009] Preferably, the ejection mechanism includes a sleeve ring, a first ejection rod is slidably connected to the inner wall of the sleeve ring, a second ejection rod is slidably connected to the inner wall of the first ejection rod, and a conical head is fixedly connected to the top of the second ejection rod.

[0010] Preferably, the conical head is conical, the top of the conical head is arc-shaped, and a hollow ring is provided between the sleeve ring and the first ejector rod.

[0011] Preferably, the ejection mechanism is provided in several groups, and the ejection mechanism is evenly distributed on the lower mold.

[0012] Preferably, the positioning mechanism includes a fixed seat, which is fixedly connected to the outer wall of the lower mold. The inner wall of the fixed seat has a U-shaped groove, a bolt hole, and a hollow groove.

[0013] Preferably, the outer wall of the fixed seat abuts against the groove of the lower stamping plate, and four sets of positioning mechanisms are provided, which are located at the four corners of the lower mold.

[0014] By employing the above technical solution, this utility model provides a quick-change device for automotive stamping dies. It possesses at least the following beneficial effects:

[0015] (1) This utility model incorporates a cooling mechanism. The circulating coolant flows directly into contact with the inner wall of the lower mold, effectively removing heat generated during the stamping process and maintaining the mold temperature within a reasonable range. This prevents mold deformation or damage due to excessive heat. By precisely controlling the flow rate and velocity of the coolant, adjustments can be made according to production needs, ensuring a stable mold temperature throughout different stamping cycles and preventing difficulties in demolding, adhesion, or jamming of workpieces due to high temperatures. This dynamic adjustment can also optimize the cooling effect based on the characteristics of different materials, ensuring a suitable mold temperature, improving demolding efficiency, and reducing production problems caused by overheating.

[0016] (2) This utility model incorporates an ejection mechanism to precisely, smoothly, and efficiently eject the workpiece, preventing scratches or dents on the workpiece surface caused by excessive pressure during ejection, thus ensuring workpiece surface quality. In particular, the conical head design, through uniformly distributed ejection force, prevents uneven stress on the workpiece, reducing cracks or deformation caused by localized overload. Furthermore, the cold air blown out by the hollow ring effectively lowers the workpiece temperature, reducing adhesion between the mold and the workpiece, thereby reducing jamming during ejection, improving production efficiency, avoiding thermal stress on the workpiece and mold caused by high temperatures, and extending the mold's service life.

[0017] (3) This utility model incorporates a positioning mechanism. Four sets of positioning mechanisms are evenly distributed at the four corners of the lower die, effectively dispersing the stress caused by vibration during the stamping process, reducing the overall vibration amplitude of the die, and improving the stability of the stamping process. This balanced support helps reduce die deformation or workpiece quality instability caused by vibration, further ensuring the precise manufacturing of the workpiece. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0019] Figure 1 This is a schematic diagram of the upper stamping plate of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the lower mold in this utility model;

[0021] Figure 3 This is a schematic diagram of the cooling mechanism in this utility model;

[0022] Figure 4 In this utility model Figure 2 Enlarged structural diagram at point A;

[0023] Figure 5 This is a schematic diagram of the positioning mechanism in this utility model.

[0024] In the diagram: 1. Upper stamping plate; 2. Upper mold; 3. Lower stamping plate; 4. Lower mold; 5. Cooling mechanism; 51. Water outlet pipe; 52. Fixed head; 53. Water outlet head; 54. Water inlet head; 55. Water inlet pipe; 6. Ejection mechanism; 61. Connecting ring; 62. First ejector rod; 63. Second ejector rod; 64. Conical head; 65. Hollow ring; 7. Positioning mechanism; 71. Fixed seat; 72. U-shaped groove; 73. Bolt hole; 74. Hollow groove. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-5As shown, this utility model provides a technical solution: a quick-change device for automotive stamping dies, including an upper stamping plate 1 and a lower stamping plate 3. An upper die 2 is fixedly connected to the bottom of the upper stamping plate 1, and a lower die 4 is fixedly connected to the top of the lower stamping plate 3. A cooling mechanism 5, an ejection mechanism 6, and a positioning mechanism 7 are provided on the lower die 4. The cooling mechanism 5 includes: a water outlet pipe 51, one end of which is fixedly connected to the inner wall of the lower die 4, and the other end of which is fixedly connected to a fixing head 52. A water outlet head 53 is fixedly connected to the outer wall of the fixing head 52, a water inlet head 54 is fixedly connected to the outer wall of the fixing head 52, and a water inlet pipe 55 is fixedly connected to the outer wall of the fixing head 52. Coolant, typically water, is introduced from an external water source into the cooling channel of the lower mold 4 through the inlet head 54, the fixed head 52, and the outlet head 53. The outlet head 53 discharges the coolant, forming a circulation. The coolant flows through the cooling channel and directly contacts the inner wall of the lower mold 4, effectively removing heat generated during the stamping process and maintaining the mold temperature within a reasonable range. This prevents overheating and thus mold deformation or damage. Cooling not only lowers the mold temperature but also improves the fit between the mold and the workpiece. At a suitable temperature, the friction between the mold surface and the workpiece surface decreases, making the demolding process smoother and reducing adhesion or jamming problems caused by overheating, thereby improving demolding efficiency. A switch is installed on the outer wall of the outlet head 53. A switch is installed on the outer wall of the water inlet head 54. The switches on the water outlet head 53 and the water inlet head 54 can adjust the water flow when needed, further optimizing the cooling effect and ensuring that the mold is within a suitable temperature range during the stamping process. In actual stamping production, temperature control of the mold and the workpiece is crucial, especially in high-frequency, high-volume stamping operations. The switches on the water outlet head 53 and the water inlet head 54 can flexibly adjust the water flow according to production needs, thereby optimizing the cooling effect of the mold and ensuring that the mold maintains a suitable temperature range in different stamping cycles. This avoids mold deformation or workpiece demolding difficulties due to excessive temperature. For example, in the initial stage of the stamping process, when the mold just comes into contact with the workpiece, local overheating may occur due to high temperature. At this point, by adjusting the switches on the inlet head 54 and outlet head 53, the water flow rate can be increased, allowing the mold surface to cool down rapidly and preventing the formation of overheated areas. During continuous stamping, as the temperature of the mold and workpiece gradually rises, the system can precisely control the size and velocity of the water flow to ensure the cooling system maintains a stable heat dissipation capacity, effectively alleviating the problem of excessively rapid mold temperature rise. Furthermore, this dynamic adjustment function of the cooling system can be adjusted according to actual conditions for different materials and stamping operations such as deep drawing and bending. For example, for metals with good plasticity, a lower cooling water flow rate may be needed to prevent the material temperature from dropping too quickly and maintain its suitable forming state. Conversely, for some harder metals…A higher water flow rate facilitates faster temperature control, preventing premature mold wear. Through this adjustment mechanism, the cooling system can precisely match the mold's heat load requirements, avoiding problems such as mold deformation, fit errors, and demolding difficulties caused by excessive temperature. This ensures high efficiency in stamping operations and high workpiece quality. This dynamic adjustment not only improves production efficiency but also extends mold lifespan and reduces failure rates and maintenance costs during production.

[0027] The ejection mechanism 6 includes a sleeve ring 61. A first ejector rod 62 is slidably connected to the inner wall of the sleeve ring 61, and a second ejector rod 63 is slidably connected to the inner wall of the first ejector rod 62. A conical head 64 is fixedly connected to the top of the second ejector rod 63. After stamping, the workpiece is pressed and fixed in the mold cavity by the mold. At this time, the ejection mechanism 6 is in an initial non-activated state. The ejection mechanism 6 is activated by mechanical or pneumatic drive. First, the sleeve ring 61 provides a fixed support position and a sliding path for the first ejector rod 62. The first ejector rod 62 begins to slide upward. The second ejector rod 63 is slidably connected to the inner wall of the first ejector rod 62. As the first ejector rod 62 moves upward, the second ejector rod 63 also moves accordingly, gradually pushing upward. Because the top of the second ejector rod 63 is fixedly connected to the conical head 64, the upward movement of the second ejector rod 63 causes the conical head 64 to gradually eject the workpiece from the mold. The conical head 64 ejects the workpiece gradually in a conical shape. Due to the design of the conical head 64, the pressure distribution during ejection is relatively uniform, avoiding excessive pressure on the workpiece surface, reducing the area of ​​ejection marks, and ensuring the surface quality of the workpiece. Through the cooperation of the first ejector rod 62 and the second ejector rod 63, the ejection process is carried out in two steps, which can push the workpiece more smoothly and is less likely to cause uneven force on the workpiece, thereby preventing cracks or damage to the workpiece surface. The ejection mechanism 6 achieves precise, stable, and efficient operation through the cooperation of the sleeve ring 61, the first ejector rod 62, the second ejector rod 63, and the conical head 64. Ejecting the workpiece avoids damage caused by improper ejection, improving production efficiency and product quality. The conical head 64 is conical, which effectively reduces the contact area with the workpiece, thereby reducing the pressure generated on the workpiece surface during ejection. The smaller contact area helps reduce surface scratches or dents caused by excessive pressure, ensuring higher workpiece surface quality. The top of the conical head 64 is arc-shaped, which allows for smoother contact with the workpiece, making the ejection process more uniform and reducing workpiece deformation or uneven stress caused by uneven ejection. Through this design, the force distribution during the ejection process is more reasonable, helping to ensure that the workpiece does not experience localized excessive stress and avoids problems such as warping and cracking due to localized overload. (The text also mentions a sleeve ring, but this seems unrelated to the main topic and is likely a separate, incomplete sentence.) A hollow ring 65 is provided between ejector pin 61 and the first ejector pin 62 to spray cold air. Ejected stamped products are typically hot due to the high temperature. The hollow ring 65, by spraying cold air, can quickly lower the workpiece temperature, preventing deformation or dimensional errors caused by excessive heat, thereby improving product quality. During ejection, especially when the workpiece surface temperature is high, adhesion or jamming may occur between the mold and the workpiece. Spraying cold air effectively reduces the workpiece surface temperature and the adhesion force between the workpiece and the mold, making the ejection process smoother, reducing jamming, and improving production efficiency. Blowing cold air can also accelerate the separation between the mold and the workpiece, reducing demolding resistance, especially in high-temperature environments.The blowing of cold air helps to quickly cool the workpiece surface, shorten the demolding time, and thus improve production efficiency. During the ejection process, the workpiece may experience thermal stress on the mold surface due to high temperatures, which can lead to mold damage over time. The cold air ejected through the hollow ring 65 effectively reduces the thermal load on the mold surface, lowers the risk of thermal expansion, and extends the mold's service life. Several sets of ejection mechanisms 6 are evenly distributed on the lower mold 4. This even distribution of multiple ejection mechanisms 6 allows for uniform application of ejection force during stamping, preventing excessive force at a single ejection point and resulting in uneven stress on the workpiece. This helps reduce workpiece deformation or breakage, ensuring consistent product dimensions and shape. The even distribution of multiple ejection mechanisms 6 also makes the stamping process more stable, reducing jamming caused by mold imbalance or excessive local friction. The workpiece can be ejected smoothly, ensuring consistently high production efficiency throughout the production process.

[0028] The positioning mechanism 7 includes a fixed seat 71, which is fixedly connected to the outer wall of the lower mold 4. A U-shaped groove 72 is formed on the inner wall of the fixed seat 71. The U-shaped groove 72 increases the structural strength, and its geometry helps to disperse stress caused by external forces. Compared to a straight groove, the curved shape of the U-shaped groove 72 can effectively withstand and disperse forces along the groove wall direction, avoiding stress concentration and thus reducing the risk of structural deformation or breakage. A bolt hole 73 is formed on the inner wall of the fixed seat 71. The bolt hole 73 can lock the two thin plates formed by the U-shaped groove 72 using fixing bolts. The U-shaped groove 72 may deform under external forces during design, especially the thin plates on both sides. Under the action of bolt locking, the fixing bolts will firmly press the thin plates together, preventing them from bending or deforming under pressure, ensuring the stability and integrity of the structure. A hollow groove 74 is provided on the inner wall of the die 1. The outer wall of the fixed seat 71 abuts against the groove of the lower stamping plate 3. When external pressure is applied to the stamping die, the contact between the groove and the fixed seat 71 can provide additional shear force support, which helps to reduce the movement of the fixed seat 71 caused by shear force, thereby further improving the stability and accuracy of the equipment during the stamping process. Four sets of positioning mechanisms 7 are provided, which are set at the four corners of the lower die 4. By evenly distributing the positioning mechanisms 7 at the four corners, the external force on the lower die 4 during the stamping process can be more evenly distributed. The vibration during the stamping process is usually concentrated in the center of the die or some local areas. The positioning mechanisms 7 at the four corners can provide balanced support force, thereby effectively dispersing the vibration and reducing the overall vibration amplitude of the die. Reducing vibration can not only improve the stability of the stamping process, but also avoid die damage or workpiece quality instability caused by vibration.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick-change device for automotive stamping dies, comprising an upper stamping plate (1) and a lower stamping plate (3), characterized in that: The bottom of the upper stamping plate (1) is fixedly connected to the upper mold (2), and the top of the lower stamping plate (3) is fixedly connected to the lower mold (4). The lower mold (4) is provided with a cooling mechanism (5), an ejection mechanism (6), and a positioning mechanism (7). The cooling mechanism (5) includes: A water outlet pipe (51) is provided. One end of the water outlet pipe (51) is fixedly connected to the inner wall of the lower mold (4). The other end of the water outlet pipe (51) is fixedly connected to a fixing head (52). A water outlet head (53) is fixedly connected to the outer wall of the fixing head (52). A water inlet head (54) is fixedly connected to the outer wall of the fixing head (52). A water inlet pipe (55) is fixedly connected to the outer wall of the fixing head (52).

2. The quick-change device for automotive stamping dies according to claim 1, characterized in that: A switch is provided on the outer wall of the water outlet head (53), and a switch is provided on the outer wall of the water inlet head (54).

3. The quick-change device for automotive stamping dies according to claim 1, characterized in that: The ejection mechanism (6) includes a sleeve ring (61), a first ejection rod (62) is slidably connected to the inner wall of the sleeve ring (61), a second ejection rod (63) is slidably connected to the inner wall of the first ejection rod (62), and a conical head (64) is fixedly connected to the top of the second ejection rod (63).

4. The quick-change device for automotive stamping dies according to claim 3, characterized in that: The conical head (64) is conical, and the top of the conical head (64) is arc-shaped. A hollow ring (65) is provided between the sleeve ring (61) and the first ejector rod (62).

5. The quick-change device for automotive stamping dies according to claim 3, characterized in that: The ejection mechanism (6) is provided in several groups, and the ejection mechanism (6) is evenly distributed on the lower mold (4).

6. The quick-change device for automotive stamping dies according to claim 5, characterized in that: The positioning mechanism (7) includes a fixed seat (71), which is fixedly connected to the outer wall of the lower mold (4). A U-shaped groove (72) is provided on the inner wall of the fixed seat (71), a bolt hole (73) is provided on the inner wall of the fixed seat (71), and a hollow groove (74) is provided on the inner wall of the fixed seat (71).

7. A quick-change device for automotive stamping dies according to claim 6, characterized in that: The outer wall of the fixed seat (71) abuts against the groove of the lower stamping plate (3), and the positioning mechanism (7) is provided in four sets, which are located at the four corners of the lower mold (4).

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