A molding die and molding method for processing automotive parts

Abstract

This invention provides a molding die and molding method for automotive parts processing, relating to the field of automotive parts molding technology. It includes: a lower die base, with a lower molding die body detachably mounted on its upper end; several sets of vertical guide rods connected at their lower parts to the upper periphery of the lower die base; a plurality of vertical through holes on an upper die base, through which the vertical guide rods slide correspondingly; and an upper molding die body detachably connected to the lower part of the upper die base via a first connecting device. This invention eliminates the need to fix the upper and lower die bases on each molding die body (composed of an upper molding die body and a lower molding die body), reducing costs. This invention allows for the cleaning of the surfaces of both the lower and upper molding die bodies using a spray nozzle, ensuring the molding quality of the workpiece. Furthermore, it can detect the positional deviation of the upper molding die body and issue an alarm when a deviation occurs.

Description

Technical Field

[0001] This invention relates to the field of automotive parts molding technology, specifically to a molding die and molding method for automotive parts processing. Background Technology

[0002] Automotive parts are the various units that make up a car and the workpieces that serve the car. When processing automotive parts, upper and lower molds are typically used in conjunction to shape the parts. Forming molds for automotive parts include hot stamping molds and cold stamping molds.

[0003] Existing forming dies for automotive parts processing, such as CN213223956U, a hot stamping forming die for automotive parts, have the following problems:

[0004] 1. The upper and lower die holders are connected to the punch press and are used to guide the forming die body (which consists of a punch and a die in CN213223956U) during the die closing process. Each forming die body needs to be equipped with an upper and lower die holder, which increases the cost.

[0005] 2. The mold base lacks a device for spraying fluid for cooling or dust removal, and does not have the effect of automatically spraying fluid for cooling or dust removal, which can easily affect the quality of the molded workpiece.

[0006] 3. The lack of relevant devices for detecting the relative positions of the upper and lower mold bases affects the reliability of molding. Summary of the Invention

[0007] This invention provides a molding die and molding method for processing automotive parts, to solve any of the technical problems mentioned in the background art.

[0008] To solve the above-mentioned technical problems, the present invention discloses a molding die for processing automotive parts, comprising:

[0009] The lower mold base has a detachable lower forming mold body at its upper end.

[0010] Several sets of vertical guide rods, the lower parts of which are connected to the upper periphery of the lower mold base;

[0011] The upper mold base is provided with several vertical through holes, which are used for several sets of vertical guide rods to slide through one by one.

[0012] The first connecting device allows the upper forming mold body to be detachably connected to the lower part of the upper mold base.

[0013] Preferably, the first connecting device includes:

[0014] Two sets of first fixing blocks are fixedly connected to the upper end of the upper forming mold body with left and right intervals. The first fixing blocks are detachably connected to the lower end of the upper mold base.

[0015] The first connecting block is also fixedly connected to the front and rear of the upper part of the upper forming mold body;

[0016] The second connecting block is fixedly connected to the front and rear sides of the upper mold base, and the first connecting block is detachably connected to the second connecting block on the corresponding side.

[0017] Preferably, the lower part of the vertical guide rod is configured as a threaded section, which is threadedly connected to the lower mold base;

[0018] Both the lower mold base and the upper mold base are connected to horizontal rods on their sides. One end of the horizontal rod is fixedly connected to the side of the lower mold base or the side of the upper mold base, and the other end of the horizontal rod is equipped with a limiting head.

[0019] Preferably, it further includes: a buffer device, the buffer device comprising two sets of buffer components spaced apart from each other, the lower forming mold body and the upper forming mold body both located between the two sets of buffer components, the buffer components comprising:

[0020] Two sets of third connecting blocks are respectively connected to the front and rear sides of the upper mold base; the fixed ends of the two sets of vertical telescopic rods are respectively fixedly connected to the two sets of third connecting blocks;

[0021] The upper pressure block is connected to the lower telescopic end of the two sets of vertical telescopic rods;

[0022] The lower pressure block is positioned directly below the upper pressure block.

[0023] Two sets of elastic support components are connected at intervals at the lower ends of the two sets of elastic support components to the upper end of the lower mold base, and the upper ends of the two sets of elastic support components are connected to the lower end of the lower pressure block.

[0024] Preferably, at least one pressure block is provided with a fluid channel, and a nozzle is provided on the side of the pressure block with the fluid channel close to the lower forming mold body along the left-right direction. The nozzle is connected to the fluid channel. A fluid inlet pipe is connected to one side of the lower mold base. A first control valve is provided on the fluid inlet pipe. The outlet of the fluid inlet pipe is connected to the fluid channel through a hose. The fluid inlet pipe is connected to the outlet of a three-way pipe. The inlet of the three-way pipe is connected to a first inlet pipe. The first inlet pipe is connected to a cleaning fluid source and a second control valve is connected to the first inlet pipe. The inlet of the three-way pipe is connected to a second inlet pipe. The second inlet pipe is connected to a cooling fluid source and a third control valve is connected to the second inlet pipe.

[0025] At least one upper pressure block is provided with a fluid channel two inside, and a nozzle two is provided on the side of the upper pressure block with the fluid channel two along the left and right direction near the upper forming mold body. The nozzle two is connected to the fluid channel two, and the inlet of the fluid channel two is connected to the first inlet pipe near the outlet through a hose two.

[0026] The nozzle is used to spray fluid to remove dust from the surface of the lower forming mold body or to cool at least one of the lower forming mold body, the upper forming mold body, and the formed workpiece.

[0027] At least one lower pressure block has several grooves horizontally spaced on its upper end, and a force sensor is embedded in the lower end of each groove. The lower end of the upper pressure block corresponding to the lower pressure block with the grooves has several protrusions that correspond one-to-one with the grooves.

[0028] This invention also discloses a method for molding automotive parts, which utilizes a molding die for processing automotive parts to perform molding. The molding method includes:

[0029] Step S1: Connect the molding die for automotive parts processing to the molding equipment;

[0030] Step S2: Control the first control valve and the second control valve to open, so that the first nozzle sprays cleaning fluid to clean the surface of the lower molding die body, and the second nozzle sprays cleaning fluid to clean the surface of the upper molding die body. After cleaning is completed, close the first control valve.

[0031] Step S3: Place the workpiece into the lower forming mold body;

[0032] Step S4: Control the upper forming mold body and the lower forming mold body to close the mold, so that the workpiece is formed;

[0033] Step S5: Control the upper forming mold body to reset, and realize mold opening.

[0034] Preferably, the forming mold for processing automotive parts further includes: a control device, an alarm device, and a timer. The control device is electrically connected to the force sensor and the alarm device, respectively. The timer counts the time from when the upper forming mold body starts to move downwards until the upper forming mold body and the lower forming mold body open during the forming process of a single workpiece. The timer is reset to zero after the forming of a single workpiece is completed.

[0035] Between steps S1 and S2, the following step is also included: Step S10: Obtain the standard force variation curve within a first target time period during the process of producing a single workpiece of the current type by closing the upper forming mold body and the lower forming mold body of the current type; the initial time of the first target time period is the moment when the force sensor detection value equals the first preset value during the forming process of a single workpiece; the end time of the first target time period is the moment when the upper forming mold body and the lower forming mold body open during the forming process of a single workpiece; the horizontal axis of the standard force variation curve is the detection value of the timer, and the vertical axis is the detection value of the force sensor;

[0036] During step S4, the force sensors are continuously controlled to operate, and the actual detection values ​​of each force sensor at the actual first moment are determined. The actual first moment is the moment when the actual detection value of any force sensor is equal to the first preset value. When the actual detection value of any force sensor at the actual first moment is not the first preset value, the first alarm in the alarm device is controlled to sound an alarm. When the actual first moment is not the horizontal coordinate corresponding to the first preset value in the standard force change curve, the second alarm in the alarm device is controlled to sound an alarm. When neither the first nor the second alarm sounds an alarm, during step S4, the actual force change curve within the first target time period is also acquired, and the actual force change curve within the first target time period is divided into several first sub-curve segments. The standard force change curve within the first target time period is divided into several second sub-curve segments. The several second sub-curve segments correspond one-to-one with the several first sub-curve segments. The horizontal coordinates of the corresponding second sub-curve segments and the first sub-curve segments are the same. The actual similarity between the first and second sub-curve segments is acquired. When the actual similarity is less than the preset similarity, the third alarm in the alarm device is controlled to sound an alarm.

[0037] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] In this invention, the upper die holder is connected to the press head of the punch press, and the lower die holder is connected to the worktable of the punch press. The vertical guide rod is used to guide the upper forming die body and the lower forming die body during the forming process. In this invention, when it is necessary to replace the upper forming die body and the lower forming die body, it is only necessary to disassemble the upper forming die body and the lower forming die body from the upper die holder and the lower die holder respectively and then replace them. In this invention, the upper die holder and the lower die holder are not fixedly set on each forming die body (composed of the upper forming die body and the lower forming die body), which reduces the cost.

[0040] In the first connecting device, the first connecting block and the second connecting block are connected to achieve a primary connection between the upper mold base and the upper forming mold body in the front-back direction. The first fixing block is connected to the lower end of the upper mold base to achieve a secondary connection between the upper mold base and the upper forming mold body in the vertical direction, thus ensuring the reliability of the connection between the upper mold base and the upper forming mold body.

[0041] In this invention, the elastic support component can be used to cushion the upper forming mold body;

[0042] The first control valve and the second control valve can be periodically opened, so that the first nozzle sprays cleaning fluid to clean the surface of the lower forming mold body, and the second nozzle sprays cleaning fluid to clean the surface of the upper forming mold body, thus ensuring the forming quality of the workpiece.

[0043] When it is necessary to use the nozzle to spray cooling fluid to cool at least one of the lower forming mold body, the upper forming mold body, and the formed workpiece, the upper forming mold body is controlled to approach the lower forming mold body but not to close with it. The second control valve is controlled to close, and the third control valve and the first control valve are controlled to open, so that the nozzle sprays cooling fluid to cool the area that needs to be cooled, thereby ensuring the accuracy and life of the mold and the quality of the formed workpiece. After the upper mold base moves downward until the upper pressure block contacts the lower pressure block, the upper mold base continues to move downward, driving the nozzle to move downward through the upper pressure block. When the lower forming mold body and the upper forming mold body are close to the mold closing position, the nozzle approaches the contact surface of the lower forming mold body and the upper forming mold body in the vertical direction, which can facilitate the simultaneous cooling of the lower forming mold body and the upper forming mold body. The vertical telescopic rod can be set as an electric telescopic rod to adjust the spraying range of the nozzle.

[0044] In this invention, a distance sensor can be installed on the head of the punch press to detect the vertical distance between the location of the distance sensor and a fixed point on the punch press.

[0045] During the process of the upper forming mold body moving downwards to the closing position of the upper forming mold body and the lower forming mold body, before the upper forming mold body contacts the workpiece, at the target position where the protrusion first contacts the force sensor and the force sensor detection value is greater than the target position, the absolute value of the first difference between each force sensor detection value and the corresponding standard force sensor detection value is obtained (based on a preset distance sensor detection value - force sensor standard detection value mapping table; the distance sensor detection value - force sensor standard detection value mapping table can be obtained based on testing). When any first difference absolute value is greater than the target position, it indicates that the upper forming mold body is offset (e.g., due to an abnormal connection between the upper mold base and the press head or an abnormal connection between the upper forming mold body and the upper mold base). At this time, an early warning is issued, and the offset state (offset direction) of the upper forming mold body is determined based on the distribution of the first difference absolute values ​​of each force sensor. The position of the upper forming mold body is adjusted according to the offset state of the upper forming mold body to ensure the forming quality of the workpiece. Attached Figure Description

[0046] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0047] Figure 1 This is a schematic diagram of the structure of the present invention;

[0048] Figure 2 This is a schematic diagram of the structure of the elastic support component of the present invention;

[0049] Figure 3 This is a schematic diagram of the internal structure of the pressure block of the present invention.

[0050] In the diagram: 1. Lower mold base; 2. Lower forming mold body; 3. Vertical guide rod; 31. Threaded section; 4. Upper mold base; 41. Vertical through hole; 5. First connecting device; 51. First fixing block; 52. First connecting block; 53. Second connecting block; 6. Horizontal rod; 7. Limiting head; 8. Buffer assembly; 81. Third connecting block; 82. Vertical telescopic rod; 83. Upper pressure block; 84. Lower pressure block; 85. Elastic support assembly; 851. Vertical inner rod; 852. Vertical outer rod; 853. Elastic support component; 854. Vertical slide groove; 9. Fluid inlet pipe; 10. First control valve; 11. T-shaped pipe; 12. Upper forming mold body; 13. Hose 1; 14. Fluid channel 1; 15. Nozzle 1; 16. First inlet pipe; 17. Second inlet pipe; 18. Groove; 19. Protrusion. Detailed Implementation

[0051] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0052] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0053] The present invention provides the following embodiments.

[0054] Example 1: This embodiment of the invention provides a molding die for processing automotive parts, such as... Figures 1-3 As shown, it includes:

[0055] Lower mold base 1, with a lower forming mold body 2 detachably mounted on the upper end of the lower mold base 1;

[0056] Several sets of vertical guide rods 3, the lower parts of which are respectively connected to the upper periphery of the lower mold base 1;

[0057] The upper mold base 4 is provided with several vertical through holes 41, which are used for several sets of vertical guide rods 3 to slide through one by one.

[0058] The first connecting device 5 is used to detachably connect the upper forming mold body 12 to the lower part of the upper mold base 4.

[0059] Preferably, the first connecting device 5 includes:

[0060] Two sets of first fixing blocks 51 are fixedly connected to the upper end of the upper forming mold body 12 with left and right intervals. The first fixing blocks 51 are detachably connected to the lower end of the upper mold base 4.

[0061] The first connecting block 52 is also fixedly connected to the front and rear of the upper part of the upper forming mold body 12;

[0062] The second connecting block 53 is fixedly connected to the front and rear sides of the upper mold base 4 respectively. The first connecting block 52 is detachably connected to the second connecting block 53 on the corresponding side.

[0063] Preferably, the lower part of the vertical guide rod 3 is provided as a threaded section 31, and the threaded section 31 is threadedly connected to the lower mold base 1;

[0064] Both the lower mold base 1 and the upper mold base 4 are connected to a horizontal rod 6 on their sides. One end of the horizontal rod 6 is fixedly connected to the side of the lower mold base 1 or the side of the upper mold base 4, and the other end of the horizontal rod 6 is provided with a limiting head 7.

[0065] The upper forming mold body 12 and the lower forming mold body 2 may also be equipped with the horizontal rod 6 and the limiting head of the present invention;

[0066] The upper forming mold body 12 and the lower forming mold body 2 of the present invention can be the upper mold (such as the punch in CN213223956U) and lower mold (such as the concave mold in CN213223956U) of existing hot stamping forming molds or the upper mold and lower mold of cold stamping forming molds.

[0067] This invention Figure 1 In the middle, the upper forming mold body 12 and the lower forming mold body 2 do not indicate the shape or internal structure of a specific forming mold, and do not specifically refer to a forming mold with a specific structure.

[0068] All of the above detachable connections can adopt existing detachable connection methods, such as bolt connections;

[0069] The working principle and beneficial effects of the above technical solution are as follows:

[0070] In this invention, the upper mold base 4 is connected to the press head of the punch press, and the lower mold base 1 is connected to the worktable of the punch press. The vertical guide rod 3 is used to guide the upper forming mold body 12 and the lower forming mold body 2 during the forming process of the workpiece. In this invention, when it is necessary to replace the upper forming mold body 12 and the lower forming mold body 2, it is only necessary to disassemble the upper forming mold body 12 and the lower forming mold body 2 from the upper mold base 4 and the lower mold base 1 respectively and then replace them. In this invention, the upper mold base 4 and the lower mold base 1 are not fixedly installed on each forming mold body (composed of the upper forming mold body 12 and the lower forming mold body 2), which reduces the cost.

[0071] The horizontal rod 6 can be used to connect with the lifting device during the lifting process of the upper mold base 4 and the lower mold base 1 in this invention;

[0072] In the first connecting device 5, the first connecting block 52 and the second connecting block 53 are connected to realize the primary connection of the upper mold base 4 and the upper forming mold body 12 in the front-back direction. The first fixing block 51 is connected to the lower end of the upper mold base 4 to realize the secondary connection of the upper mold base 4 and the upper forming mold body 12 in the vertical direction, thus ensuring the reliability of the connection between the upper mold base 4 and the upper forming mold body 12.

[0073] Example 2, based on Example 1, such as Figures 1-3As shown, it also includes: a buffer device, which comprises two sets of buffer components 8 spaced apart from each other on the left and right. The lower forming mold body 2 and the upper forming mold body 12 are both located between the two sets of buffer components 8. The buffer component 8 includes:

[0074] Two sets of third connecting blocks 81 are respectively connected to the front and rear sides of the upper mold base 4;

[0075] Two sets of vertical telescopic rods 82, with their fixed ends respectively fixedly connected to two sets of third connecting blocks 81;

[0076] Upper pressure block 83 is connected to the lower telescopic end of the two sets of vertical telescopic rods 82;

[0077] The lower pressure block 84 is positioned directly below the upper pressure block 83.

[0078] Two sets of elastic support components 85 are connected at intervals at the lower ends of the two sets of elastic support components 85 to the upper end of the lower mold base 1, and the upper ends of the two sets of elastic support components 85 are connected to the lower end of the lower pressure block 84.

[0079] Preferably, at least one pressing block 84 has a fluid channel 14 inside, and a nozzle 15 is provided on the side of the pressing block 84 with the fluid channel 14 along the left-right direction near the lower forming mold body 2. The nozzle 15 is connected to the fluid channel 14. A fluid inlet pipe 9 is connected to one side of the lower mold base 1. A first control valve 10 is provided on the fluid inlet pipe 9. The outlet of the fluid inlet pipe 9 is connected to the fluid channel 14 through a hose 13. The fluid inlet pipe 9 is connected to the outlet of a three-way pipe 11. The inlet of the three-way pipe 11 is connected to a first inlet pipe 16. The first inlet pipe 16 is connected to a cleaning fluid source. A second control valve is connected to the first inlet pipe 16. The second inlet of the three-way pipe 11 is connected to a second inlet pipe 17. The second inlet pipe 17 is connected to a cooling fluid source. A third control valve is connected to the second inlet pipe 17. In this invention, the cleaning fluid source can be water or compressed air, and the cooling fluid source can be cooling water or cooled air.

[0080] Nozzle 15 is used to spray fluid to remove dust from the surface of the lower forming mold body 2 or to cool at least one of the lower forming mold body 2, the upper forming mold body 12, and the formed workpiece.

[0081] At least one upper pressure block 83 has a fluid channel 2 inside, and a nozzle 2 is provided on the side of the upper pressure block 83 with the fluid channel 2 along the left-right direction near the upper forming mold body 12. The nozzle 2 is connected to the fluid channel 2, and the inlet of the fluid channel 2 is connected to the first inlet pipe 16 near the outlet through a hose 2. A connecting pipe can be provided at the inlet of the fluid channel 2, and the connecting pipe is connected to the outlet of the hose 2. A fourth control valve is provided on the connecting pipe. The structure of the fluid channel 2 and the nozzle 2 can be seen in fluid channel 14 and nozzle 15.

[0082] At least one lower pressure block 84 has several grooves 18 horizontally spaced on its upper end. A force sensor is embedded in the lower end of each groove 18. The lower end of the upper pressure block 83 corresponding to the groove 18 is provided with several protrusions 19 that correspond one-to-one with the grooves 18.

[0083] The elastic support assembly 85 includes: a vertical inner rod 851 and a vertical outer rod 852. A vertical groove 854 is provided inside the vertical outer rod 852. The lower part of the vertical inner rod 851 is slidably connected to the vertical groove 854 of the vertical outer rod 852 along the vertical direction. The upper end of the vertical inner rod 851 is fixedly connected to the lower pressure block 84. The lower end of the vertical outer rod 852 is fixedly connected to the upper end of the lower mold base 1. An elastic support component 853 is provided between the lower end of the vertical inner rod 851 and the lower inner wall of the vertical groove 854. The elastic support component 853 can be a spring.

[0084] When the upper forming mold body 12 and the lower forming mold body 2 of the present invention are cold stamping forming molds, when the upper forming mold body 12 and the lower forming mold body 2 heat up during the working process (such as due to heat generated by friction or heat transfer with high-temperature workpieces) and need to be cooled down, cooling fluid can be sprayed from the nozzle 15 and the nozzle 2 of the present invention to cool down the upper forming mold body 12 and the lower forming mold body 2, so as to maintain the accuracy of the upper forming mold body 12 and the lower forming mold body 2 and extend the service life of the upper forming mold body 12 and the lower forming mold body 2;

[0085] A method for molding automotive parts, comprising molding using a molding die for automotive parts processing, the molding method including:

[0086] Step S1: Connect the molding die for automotive parts processing to the molding equipment;

[0087] Step S2: Control the first control valve 10 and the second control valve to open, so that the first nozzle 15 sprays cleaning fluid to clean the surface of the lower molding die body 2, and the second nozzle sprays cleaning fluid to clean the surface of the upper molding die body 12. After cleaning is completed, the first control valve 10 is closed.

[0088] Step S3: Place the workpiece into the lower forming mold body 2;

[0089] Step S4: Control the upper forming mold body 12 and the lower forming mold body 2 to close the mold, so that the workpiece is formed;

[0090] Step S5: Control the upper forming mold body 12 to reset, and realize mold opening.

[0091] Step S5 further includes: during the process of controlling the upper forming mold body 12 to reset, when it is necessary to use nozzles (specifically nozzle 15 and / or nozzle 2) to spray cooling fluid to cool at least one of the lower forming mold body 2, the upper forming mold body 12, and the formed workpiece, the upper forming mold body 12 is controlled to move upward to a position where the upper forming mold body 12 and the lower forming mold body 2 are just a certain distance apart, the second control valve is controlled to close, and the third control valve and the first control valve 10 are controlled to open, so that at least one of nozzles 15 and nozzle 2 sprays cooling fluid to cool the position that needs to be cooled.

[0092] The working principle and beneficial effects of the above technical solution are as follows:

[0093] In this invention, the elastic support component 85 can be used to cushion the upper forming mold body 12;

[0094] The first control valve 10 and the second control valve can be periodically opened, so that the first nozzle 15 sprays cleaning fluid to clean the surface of the lower forming mold body 2, and the second nozzle sprays cleaning fluid to clean the surface of the upper forming mold body 12, thereby ensuring the forming quality of the workpiece.

[0095] When it is necessary to use nozzle 15 to spray cooling fluid to cool at least one of the lower forming mold body 2, upper forming mold body 12, and the formed workpiece, the upper forming mold body 12 is controlled to approach the lower forming mold body 2 but not to close with it. The second control valve is controlled to close, and the third control valve and the first control valve 10 are controlled to open, so that nozzle 15 sprays cooling fluid to cool the position that needs to be cooled, thereby ensuring the accuracy and life of the mold and the quality of the formed workpiece. After the upper mold base 4 moves downward until the upper pressure block 83 contacts the lower pressure block 84, the upper mold base 4 continues to move downward, driving nozzle 15 downward through the upper pressure block 83. When the lower forming mold body 2 and the upper forming mold body 12 are close to the mold closing position, nozzle 15 approaches the contact surface of the lower forming mold body 2 and the upper forming mold body 12 in the vertical direction, which can facilitate the simultaneous cooling of the lower forming mold body 2 and the upper forming mold body 12. The vertical telescopic rod 82 can be set as an electric telescopic rod to adjust the spraying range of nozzle 15.

[0096] In this invention, a distance sensor can be installed on the head of the punch press to detect the vertical distance between the location of the distance sensor and a fixed point on the punch press.

[0097] During the process of the upper forming mold body 12 moving downwards to the closing process of the upper forming mold body 12 and the lower forming mold body 2, before the upper forming mold body 12 contacts the workpiece, the target position where the protrusion 19 first contacts the force sensor to make the force sensor detection value greater than 0 is obtained. The absolute value of the first difference between each force sensor detection value and the corresponding standard force sensor detection value is obtained (based on the preset distance sensor detection value-force sensor standard detection value mapping table; the distance sensor detection value-force sensor standard detection value mapping table can be obtained based on testing). When any first difference absolute value is greater than 0, it indicates that the position of the upper forming mold body 12 is offset (such as due to abnormal connection between the upper mold base 4 and the press head or abnormal connection between the upper forming mold body 12 and the upper mold base 4). At this time, an early warning is issued, and the offset state (offset direction) of the upper forming mold body 12 is determined based on the distribution of the first difference absolute values ​​of each force sensor. The position of the upper forming mold body 12 is adjusted according to the offset state of the upper forming mold body 12 to ensure the forming quality of the workpiece.

[0098] Example 3, based on Example 2, the molding die for processing automotive parts further includes: a control device, an alarm device, and a timer. The control device is electrically connected to the force sensor and the alarm device respectively. The timer counts the time from when the upper molding die body 12 starts to move downwards until the upper molding die body 12 and the lower molding die body 2 open during the molding process of a single workpiece. The timer is reset to zero after the molding of a single workpiece is completed.

[0099] Between steps S1 and S2, the following step is also included: Step S10: Obtain the standard force variation curve within a first target time period during the process of producing a single workpiece of the current type by closing the upper forming mold body 12 and the lower forming mold body 2 of the current type; the initial time of the first target time period is the moment when the force sensor detection value equals the first preset value (a positive number close to 0, which can be 0.3N) during the forming process of a single workpiece; the end time of the first target time period is the moment when the upper forming mold body 12 and the lower forming mold body 2 open during the forming process of a single workpiece; the horizontal axis of the standard force variation curve is the detection value of the timer, and the vertical axis is the detection value of the force sensor;

[0100] During step S4, the force sensors are continuously controlled to operate, and the actual detection values ​​of each force sensor at the actual first moment are determined. The actual first moment is the moment when the actual detection value of any force sensor is equal to the first preset value. When the actual detection value of any force sensor at the actual first moment is not the first preset value, the first alarm in the alarm device is controlled to sound an alarm. When the actual first moment is not the horizontal coordinate corresponding to the first preset value in the standard force change curve, the second alarm in the alarm device is controlled to sound an alarm. When neither the first nor the second alarm sounds an alarm, during step S4, the actual force change curve within the first target time period is also acquired, and the actual force change curve within the first target time period is divided into several first sub-curve segments. The standard force change curve within the first target time period is divided into several second sub-curve segments. The several second sub-curve segments correspond one-to-one with the several first sub-curve segments. The horizontal coordinates of the corresponding second sub-curve segments and the first sub-curve segments are the same. The actual similarity between the first and second sub-curve segments is acquired. When the actual similarity is less than the preset similarity, the third alarm in the alarm device is controlled to sound an alarm.

[0101] The beneficial effects of the above technical solution are as follows: the alarm of the first alarm indicates that the position of the upper forming mold body 12 is abnormal when it moves down to the actual first moment (such as due to the abnormal connection between the upper mold base 4 and the punch press head or the abnormal connection between the upper forming mold body 12 and the upper mold base 4), reminding that the position of the upper forming mold body 12 needs to be adjusted.

[0102] The second alarm sounds, reminding that when the die head of the punch press descends to the actual first moment, the actual descent speed of the upper forming mold body 12 may be abnormal compared to the theoretical descent speed, and the die head of the punch press needs to be inspected.

[0103] If the third alarm sounds, it indicates that the actual descent speed of the upper forming mold body 12 during the first target time period may be abnormal compared to the theoretical descent speed. This could be due to quality issues with the lower forming mold body 2, the upper forming mold body 12, or a problem with the press head. Therefore, the lower forming mold body 2, the upper forming mold body 12, or the press head needs to be inspected. If only the actual similarity between the first and second sub-curve segments corresponding to the time from the moment the upper forming mold body 12 contacts the workpiece to the time when the upper forming mold body 12 and the lower forming mold body 2 open is less than the preset similarity, then the reliability of a quality abnormality in the lower forming mold body 2 and the upper forming mold body 12 is higher, and the lower forming mold body 2 and the upper forming mold body 12 should be inspected first.

[0104] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A forming mold for processing automotive parts, characterized in that: include: The lower mold base (1) has a detachable lower forming mold body (2) at its upper end; Several sets of vertical guide rods (3), the lower parts of which are connected to the upper periphery of the lower mold base (1); The upper mold base (4) is provided with several vertical through holes (41), which are used for several sets of vertical guide rods (3) to slide through one by one. The first connecting device (5) is used to detachably connect the upper forming mold body (12) to the lower part of the upper mold base (4); It also includes: a buffer device, which comprises two sets of buffer components (8) spaced apart on the left and right, wherein the lower forming mold body (2) and the upper forming mold body (12) are both located between the two sets of buffer components (8), and the buffer components (8) include: Two sets of third connecting blocks (81) are respectively connected to the front and rear sides of the upper mold base (4); the fixed ends of two sets of vertical telescopic rods (82) are respectively fixedly connected to the two sets of third connecting blocks (81); Upper pressure block (83) is connected to the lower telescopic end of the two sets of vertical telescopic rods (82); The lower pressure block (84) is positioned directly below the upper pressure block (83); Two sets of elastic support components (85) are connected at intervals at the lower ends of the two sets of elastic support components (85) to the upper end of the lower mold base (1), and the upper ends of the two sets of elastic support components (85) are connected to the lower end of the lower pressure block (84). At least one pressure block (84) has a fluid channel (14) inside, and a nozzle (15) is provided on the side of the pressure block (84) with the fluid channel (14) close to the lower forming mold body (2) along the left and right direction. The nozzle (15) is connected to the fluid channel (14). A fluid inlet pipe (9) is connected to one side of the lower mold base (1). A first control valve (10) is provided on the fluid inlet pipe (9). The outlet of the fluid inlet pipe (9) is connected to the fluid channel (14) through a hose (13). The fluid inlet pipe (9) is connected to the outlet of a three-way pipe (11). The inlet of the three-way pipe (11) is connected to a first inlet pipe (16). The first inlet pipe (16) is connected to a cleaning fluid source. A second control valve is connected to the first inlet pipe (16). The inlet of the three-way pipe (11) is connected to a second inlet pipe (17). The second inlet pipe (17) is connected to a cooling fluid source. A third control valve is connected to the second inlet pipe (17). At least one upper pressure block (83) is provided with a fluid channel two inside, and a nozzle two is provided on the side of the upper pressure block (83) with the fluid channel two along the left and right direction near the upper forming mold body (12). The nozzle two is connected to the fluid channel two, and the inlet of the fluid channel two is connected to the first inlet pipe (16) near the outlet through a hose two. Nozzle 1 (15) is used to spray fluid to remove dust from the surface of the lower forming mold body (2) or to cool at least one of the lower forming mold body (2), the upper forming mold body (12), and the formed workpiece; At least one pressing block (84) has several grooves (18) horizontally spaced at the upper end. A force sensor is embedded in the lower end of the groove (18). The lower end of the upper pressing block (83) corresponding to the pressing block (84) with the groove (18) is provided with several protrusions (19) that correspond one-to-one with the grooves (18).

2. The molding die for processing automotive parts according to claim 1, characterized in that: The first connecting device (5) includes: Two sets of first fixing blocks (51) are fixedly connected to the upper end of the upper forming mold body (12) with left and right intervals. The first fixing blocks (51) are detachably connected to the lower end of the upper mold base (4). The first connecting block (52) is also fixedly connected to the front and rear parts of the upper forming mold body (12); The second connecting block (53) is fixedly connected to the front and rear sides of the upper mold base (4), and the first connecting block (52) is detachably connected to the second connecting block (53) on the corresponding side.

3. The molding die for processing automotive parts according to claim 1, characterized in that: The lower part of the vertical guide rod (3) is set as a threaded section (31), and the threaded section (31) is threadedly connected to the lower mold base (1).

4. A method for molding automotive parts, comprising molding using a molding die for processing automotive parts as described in any one of claims 1-3, characterized in that, Molding methods include: Step S1: Connect the molding die for automotive parts processing to the molding equipment; Step S2: Control the first control valve (10) and the second control valve to open, so that the first nozzle (15) sprays cleaning fluid to clean the surface of the lower molding die body (2), and the second nozzle sprays cleaning fluid to clean the surface of the upper molding die body (12). After cleaning is completed, the first control valve (10) is closed. Step S3: Place the workpiece into the lower forming mold body (2); Step S4: Control the upper forming mold body (12) and the lower forming mold body (2) to close the mold, so that the workpiece is formed; Step S5: Control the upper forming mold body (12) to reset, and realize mold opening; The forming mold for processing automotive parts also includes: a control device, an alarm device, and a timer. The control device is electrically connected to the force sensor and the alarm device respectively. The timer counts the time from when the upper forming mold body (12) starts to move downwards until the upper forming mold body (12) and the lower forming mold body (2) open during the forming process of a single workpiece. The timer is reset to zero after the forming of a single workpiece is completed. Between steps S1 and S2, there is also: Step S10: Obtain the standard force variation curve within the first target time period during the process of mold closing to produce a single workpiece of the current type by the upper forming mold body (12) and the lower forming mold body (2) of the current type; the initial time of the first target time period is the moment when the force sensor detection value is equal to the first preset value during the forming process of a single workpiece; the end time of the first target time period is the moment when the upper forming mold body (12) and the lower forming mold body (2) open during the forming process of a single workpiece; the horizontal axis of the standard force variation curve is the detection value of the timer, and the vertical axis is the detection value of the force sensor; During step S4, the force sensors are continuously controlled to operate, and the actual detection values ​​of each force sensor at the actual first moment are determined. The actual first moment is the moment when the actual detection value of any force sensor is equal to the first preset value. When the actual detection value of any force sensor at the actual first moment is not the first preset value, the first alarm in the alarm device is controlled to sound an alarm. When the actual first moment is not the horizontal coordinate corresponding to the first preset value in the standard force change curve, the second alarm in the alarm device is controlled to sound an alarm. When neither the first nor the second alarm sounds an alarm, during step S4, the actual force change curve within the first target time period is also acquired, and the actual force change curve within the first target time period is divided into several first sub-curve segments. The standard force change curve within the first target time period is divided into several second sub-curve segments. The several second sub-curve segments correspond one-to-one with the several first sub-curve segments. The horizontal coordinates of the corresponding second sub-curve segments and the first sub-curve segments are the same. The actual similarity between the first and second sub-curve segments is acquired. When the actual similarity is less than the preset similarity, the third alarm in the alarm device is controlled to sound an alarm.

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