A stamping device for an automobile stamping

Abstract

The application relates to the technical field of stamping devices, in particular to a stamping device for automobile stamping parts, which comprises an upper die, a lower die and a cooling system. An upper die holder is fixedly arranged on the upper die, the lower die is provided with a lower die groove, the upper die is moved downward to cooperate with the lower die, and a workpiece is formed in the closing process of the upper die holder and the lower die groove. The cooling system comprises a first radiating pipe assembly and a first adjusting assembly. In the forming process of the workpiece, the first radiating pipe assembly cools the upper die and the workpiece through cooling liquid, and the first adjusting assembly adjusts the flow of the cooling liquid by sensing the temperature change of the cooling liquid in real time. Therefore, the function of automatically adjusting the flow of the cooling liquid according to the temperature of the cooling liquid is realized, the cooling uniformity is ensured, and the forming quality of the workpiece and the service life of the upper die are guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stamping device, in particular to a stamping device for automobile stamping parts. BACKGROUND

[0002] Stamping is a common pressure processing method, which separates or plastically deforms the material by installing the die on the press to apply pressure, so as to obtain the required shape of the part. Taking the automobile support plate stamping part as an example, its forming process usually includes: heating the original plate to austenite temperature, then conveying it to the stamping die by automatic reinforced clamps, and completing the forming under the action of the stamping device. In this high-temperature forming process, the die is continuously heated due to repeated contact with the high-temperature workpiece, and if not cooled in time, it will cause thermal stress concentration and thermal fatigue of the die, affecting the forming precision and service life of the die.

[0003] In order to improve the service life of the die and the forming quality of the stamping part, a cooling device is usually arranged in the die to continuously cool the die by circulating cooling liquid. For example, the Chinese patent with publication number CN104275415B discloses a cooling water channel structure for hot stamping, wherein the transition die plate converges one or more water flow channels through the transition water tank, so that the complex water flow channels in the forming die core plate are converged and connected to one or more transition water tanks, facilitating the supply and circulation of cooling water and ensuring the rapid cooling of the stamping part.

[0004] Although the complex water flow channels increase the flow path of the cooling liquid, which helps to improve the overall heat dissipation capacity, they cannot adjust the cooling liquid flow size in real time according to the cooling liquid temperature, resulting in inconsistent cooling rate in different areas of the die during the cooling process, and local cooling too fast or too slow, which affects the cooling uniformity and forming quality of the stamping part, and reduces the service life of the die. SUMMARY

[0005] Therefore, it is necessary to provide a stamping device for automobile stamping parts in view of the problem that the current die cooling device cannot adjust the cooling liquid flow size in real time according to the cooling liquid temperature.

[0006] The above-mentioned purpose is achieved by the following technical scheme:

[0007] A stamping device for automobile stamping parts, comprising:

[0008] an upper die, which is fixedly provided with an upper die seat;

[0009] a lower die, which is provided with a lower die groove; the upper die moves downward and cooperates with the lower die, and the workpiece is formed during the cooperation of the upper die seat and the lower die groove;

[0010] The cooling system comprises a first heat pipe assembly and a first adjusting assembly, both of which are arranged inside the upper die; during the forming process of the workpiece, the first heat pipe assembly is used for cooling the upper die and the workpiece by the cooling liquid; and the first adjusting assembly is used for sensing the temperature change of the cooling liquid in real time to adjust the flow of the cooling liquid.

[0011] Further, the first heat pipe assembly comprises a main water pipe and a plurality of branch water pipes, one end of the main water pipe is connected to the cooling liquid, and the other end is connected to the cooling liquid, a plurality of branch water pipes are arranged on both sides of the main water pipe along the axial direction of the main water pipe, and both ends of each branch water pipe are connected to the main water pipe; during the cooling process, the first adjusting assembly is used for adjusting the flow of the cooling liquid into the branch water pipe.

[0012] Further, the first heat pipe assembly comprises a large water pipe, a plurality of middle water pipes and a plurality of small water pipes; one end of the large water pipe is a water inlet, and the other end is a water outlet, the water inlet is used for connecting to the cooling liquid, and the water outlet is used for discharging the cooling liquid; a plurality of middle water pipes are arranged on both sides of the large water pipe at intervals, one end of each middle water pipe is a water inlet hole, and the other end is a water outlet hole, the water inlet hole and the water outlet hole are connected to the large water pipe; a plurality of small water pipes are arranged at intervals, and both ends of each small water pipe are connected to the middle water pipe; the distance between the large water pipe, the middle water pipe and the small water pipe and the upper die seat gradually decreases; during the cooling process, the first adjusting assembly is used for adjusting the flow of the cooling liquid into the middle water pipe and the small water pipe.

[0013] Further, the first adjusting assembly comprises two groups of adjusting units, and the two groups of adjusting units are symmetrically arranged along the central axis of the large water pipe; each group of adjusting units comprises a plurality of control units and a plurality of sensing units, the control units are used for dynamically adjusting the flow of the cooling liquid through the water inlet hole after the sensing units sense the temperature of the cooling liquid in the middle water pipe.

[0014] Further, each of the control units comprises a first guide plate, a second guide plate and a hinge shaft, the first guide plate and the second guide plate are arranged inside the large water pipe, and the first guide plate is arranged close to the water inlet hole and spaced apart from the water inlet hole; the two ends of the hinge shaft are rotationally connected with the large water pipe, and the first guide plate and the second guide plate are hinged through the hinge shaft; each of the control units further comprises a first limiting plate and a second limiting plate, the first limiting plate and the second limiting plate are hinged, the first limiting plate is hinged with the first guide plate, and the second limiting plate is hinged with the second guide plate; the first guide plate, the second guide plate, the first limiting plate and the second limiting plate jointly enclose a first area; when the temperature of the cooling liquid in the middle water pipe changes, the inductive unit changes the area of the first area to adjust the opening angle between the water inlet hole and the first guide plate.

[0015] Further, each of the inductive units comprises a first inductive piece, a gas transmission pipe and a gas bag, the first inductive piece is fixedly arranged in the middle water pipe close to the water outlet hole, and the gas bag is arranged in the first area; one end of the gas transmission pipe is fixedly connected with the first inductive piece, and the other end is fixedly connected with the gas bag.

[0016] Further, each of the inductive units comprises a first inductive piece, a gas transmission pipe and a gas bag, the first inductive piece is fixedly arranged in the middle water pipe close to the water outlet hole, and the gas bag is arranged in the first area; one end of the gas transmission pipe is fixedly connected with the first inductive piece, and the other end is fixedly connected with the gas bag.

[0017] Further, the control unit further comprises a push spring, one end of the push spring is fixedly connected with the first guide plate, and the other end is fixedly connected with the second guide plate; the elastic force of the push spring always makes the first guide plate and the second guide plate have a mutual moving trend away from each other.

[0018] Further, along the flow direction of the cooling liquid in the large water pipe, the elastic force of the push spring in each of the control units gradually decreases.

[0019] Further, the lower die is internally provided with a second heat dissipation pipe assembly and a second adjusting assembly, and the first heat dissipation pipe assembly and the second heat dissipation pipe assembly are arranged in mirror image symmetry at the mounting position.

[0020] The beneficial effects of the present application are:

[0021] This invention provides a stamping apparatus for automotive stamping parts, comprising: an upper die, a lower die, and a cooling system. An upper die base is fixedly mounted on the upper die, and a lower die groove is formed in the lower die. The upper die moves downwards to engage with the lower die, allowing the workpiece to be formed during the engagement of the upper die base and the lower die groove. The cooling system includes a first heat dissipation pipe assembly and a first adjustment assembly. During workpiece forming, the first heat dissipation pipe assembly cools the upper die and the workpiece using coolant, while the first adjustment assembly senses real-time changes in coolant temperature to adjust the coolant flow rate. Therefore, this invention achieves the function of automatically adjusting the coolant flow rate based on coolant temperature, ensuring uniform cooling, guaranteeing the forming quality of the workpiece, and extending the service life of the upper die. Attached Figure Description

[0022] Figure 1 This is an isometric view of a stamping apparatus for automotive stamping parts provided in an embodiment of the present invention;

[0023] Figure 2 for Figure 1 A sectional view;

[0024] Figure 3 for Figure 1 Exploded view;

[0025] Figure 4 for Figure 3 A magnified view of part A in the diagram;

[0026] Figure 5 for Figure 4 A magnified view of part B in the diagram;

[0027] Figure 6 for Figure 4 Official drawing of the heat pipe assembly;

[0028] Figure 7 for Figure 6 Axonometric view of the section along the AA line;

[0029] Figure 8 for Figure 7 A magnified view of part of C;

[0030] Figure 9 for Figure 6 Axonometric view of the section along the BB line.

[0031] in:

[0032] 110. Upper mold base; 111. Upper mold; 112. Upper mold base; 120. Lower mold base; 121. Lower mold; 122. Lower mold slot; 131. Telescopic rod; 132. Limiting block; 133. Workpiece;

[0033] 210, first heat dissipation pipe assembly; 220, second heat dissipation pipe assembly; 211, first clamping plate; 212, second clamping plate; 213, large upper groove; 214, large lower groove; 215, middle groove; 216, small groove; 217, fixing groove; 221, large water pipe; 222, middle water pipe; 223, small water pipe; 224, mounting block; 225, water inlet; 226, water outlet; 227, water inlet hole; 228, water outlet hole;

[0034] 300, first adjusting assembly; 310, adjusting unit; 311, first guide plate; 312, second guide plate; 321, first limiting plate; 322, second limiting plate; 323, hinged shaft; 324, hinged rod; 331, first sensing piece; 332, gas transmission pipe; 333, air bag; 334, second sensing piece; 335, pushing rod; 336, pushing spring. DETAILED DESCRIPTION

[0035] In order to make the objects, technical solutions and advantages of the present application clearer, the following further describes the present application with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0036] The serial numbers of components in the present application, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequence or technical meaning. The "connection" and "coupling" in the present application include direct and indirect connection (coupling) unless otherwise specified. In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientations or positional relationships shown in the drawings and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as limiting the present application in terms of the specific orientations, configurations and operations of the devices or elements indicated.

[0037] In the present application, unless otherwise explicitly specified and limited, the "on" or "under" of the first feature to the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the "over", "above" and "on" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0038] The following refers to Figures 1 to 9The application discloses a stamping device for automobile stamping parts.

[0039] As shown in the drawings, Figure 1 The stamping device for automobile stamping parts is particularly suitable for stamping a workpiece 133 and cooling the workpiece 133, and can also be used for cooling under other working conditions under appropriate circumstances.

[0040] The stamping device for automobile stamping parts comprises a plurality of telescopic rods 131, an upper die holder 110, an upper die 111, a lower die holder 120 and a lower die 121. The plurality of telescopic rods 131 are arranged on the lower die holder 120 at intervals, one end of each telescopic rod 131 is fixedly connected to the lower die holder 120, and the other end of each telescopic rod 131 is fixedly connected to the upper die holder 110. The upper die 111 is fixedly arranged on the upper die holder 110, and an upper die seat 112 is fixedly arranged on the upper die 111; the lower die 121 is fixedly arranged on the lower die holder 120, and a lower die groove 122 is formed in the lower die 121. Specifically, during stamping forming of the workpiece 133, the workpiece 133 heated to an austenite temperature is first placed on the lower die groove 122. Then, the telescopic rods 131 are retracted to drive the upper die 111 to move downward and abut against the lower die 121, that is, Figure 1 the upper and lower directions, so that the upper die seat 112 and the lower die groove 122 gradually abut against each other. Under the continuous extrusion force of the upper die 111, the workpiece 133 is stamped and formed in the upper die seat 112 and the lower die groove 122.

[0041] During stamping of the workpiece 133, in order to ensure the service life of the upper die 111 and the forming quality of the workpiece 133, the stamping device for automobile stamping parts further comprises a cooling system, and the cooling system comprises a first heat dissipation pipe assembly 210 and a first adjusting assembly 300. The first heat dissipation pipe assembly 210 and the first adjusting assembly 300 are arranged in the interior of the upper die 111, and the first heat dissipation pipe assembly 210 is located close to the upper die seat 112. Specifically, during stamping of the workpiece 133, the first heat dissipation pipe assembly 210 continuously cools the upper die 111 and the upper die seat 112 by means of cooling liquid, and then cools the workpiece 133. During the process, the first adjusting assembly 300 dynamically adjusts the flow of the cooling liquid by sensing the temperature change of the cooling liquid in real time, so as to optimize the cooling effect. When the temperature of the upper die 111 and the workpiece 133 increases, the first adjusting assembly 300 increases the flow of the cooling liquid in the first heat dissipation pipe assembly 210, so as to enhance the cooling effect; and when the temperature of the upper die 111 and the workpiece 133 decreases, the first adjusting assembly 300 reduces the flow of the cooling liquid in the first heat dissipation pipe assembly 210, so as to ensure the cooling effect and avoid unnecessary waste of resources.

[0042] In one of the embodiments, the first heat dissipation pipe assembly 210 comprises a main water pipe and a plurality of branch water pipes. One end of the main water pipe is connected to the cooling liquid, and the other end is connected to the cooling liquid. The plurality of branch water pipes are arranged along the axial direction of the main water pipe and are arranged on both sides of the main water pipe. Both ends of each branch water pipe are connected to the main water pipe, forming a multi-branch cooling structure. When the cooling liquid is introduced into the main water pipe, the cooling liquid flows into each branch water pipe in turn, effectively extending the flow path of the cooling liquid inside the upper mold 111, improving the heat dissipation effect of the workpiece 133 and the upper mold 111, and ensuring the forming quality of the workpiece 133 and the service life of the upper mold 111. Further, during the cooling process, the first adjusting assembly 300 can adjust the flow of cooling liquid into the branch water pipe according to the temperature change of the cooling liquid. When the temperature of the cooling liquid increases, the first adjusting assembly 300 increases the flow of cooling liquid into the branch water pipe;

[0043] When the temperature of the cooling liquid decreases, the first adjusting assembly 300 reduces the flow of cooling liquid into the branch water pipe.

[0044] In one of the embodiments, the first heat dissipation pipe assembly 210 comprises a large water pipe 221, a plurality of middle water pipes 222, and a plurality of small water pipes 223. In addition, the first heat dissipation pipe assembly 210 further comprises a first clamping plate 211 and a second clamping plate 212. The first clamping plate 211 and the second clamping plate 212 are detachably arranged in the upper mold 111, and the first clamping plate 211 and the second clamping plate 212 are in abutment in the up-down direction. Figure 3

[0045] Further, the first clamping plate 211 is provided with a large upper groove 213, and the opening direction of the large upper groove 213 is downward. The second clamping plate 212 is provided with a large lower groove 214, and the opening direction of the large lower groove 214 is upward, i.e. in the up-down direction. Figure 3

[0046] The first heat dissipation pipe assembly 210 further comprises a plurality of mounting blocks 224, wherein the second clamping plate 212 is provided with a plurality of upward opening fixing grooves 217, i.e. in the up-down direction. Figure 3 ​​The mounting block 224 is detachably arranged in the fixing groove 217 along the up-down direction. A middle groove 215 with an upward opening is arranged between each mounting block 224 and the second clamping plate 212, and the middle groove 215 is closer to the upper die seat 112 than the large lower groove 214. All the middle grooves 215 are located in the same plane and are in communication with the large lower groove 214 at both ends. A middle water pipe 222 is detachably arranged in the middle groove 215. One end of the middle water pipe 222 is a water inlet hole 227, and the other end is a water outlet hole 228. Both the water inlet hole 227 and the water outlet hole 228 are in communication with the large water pipe 221.

[0047] A plurality of small grooves 216 with upward openings are arranged in the bottom of each fixing groove 217. The small grooves 216 are closer to the upper die seat 112 than the middle grooves 215 along the up-down direction. The plurality of small grooves 216 are arranged at intervals and located in the same plane. Both ends of each small groove 216 are in communication with the middle groove 215. Figure 3 The small water pipe 223 is detachably arranged in the small groove 216, and both ends of the small water pipe 223 are in communication with the middle water pipe 222. Therefore, when the cooling liquid is injected from the water inlet hole 225 of the large water pipe 221, the cooling liquid flows into the middle water pipe 222 and the small water pipe 223 in turn, further prolonging the flow path of the cooling liquid inside the upper die 111 and improving the cooling effect on the upper die 111 and the workpiece 133. During the cooling process, the first adjusting assembly 300 can adjust the flow of cooling liquid into the middle water pipe 222 and the small water pipe 223 according to the temperature change of the cooling liquid.

[0048] In one embodiment, the first adjusting assembly 300 includes two sets of adjusting units 310, which are symmetrically arranged along the central axis of the large water pipe 221. Each set of adjusting units 310 includes a plurality of control units and a plurality of sensing units. In particular, each control unit is linked with a corresponding sensing unit to individually control the flow of cooling liquid into one middle water pipe 222.

[0049] Specifically, when the cooling liquid is injected into the large water pipe 221 from the water inlet 225, the cooling liquid flows into the middle water pipe 222 through the water inlet hole 227, and then flows into the small water pipe 223, achieving a step-by-step cooling effect. In this process, the induction unit senses the temperature change of the cooling liquid in the middle water pipe 222 in real time. When the temperature of the cooling liquid rises, the control unit increases the flow of the cooling liquid through the water inlet hole 227, so that more cooling liquid enters the middle water pipe 222 and the small water pipe 223, and at the same time, the flow speed of the cooling liquid is increased, further enhancing the cooling effect; when the temperature of the cooling liquid decreases, the control unit reduces the flow of the cooling liquid through the water inlet hole 227, reducing the flow of the cooling liquid in the middle water pipe 222 and the small water pipe 223, while ensuring the cooling effect and avoiding unnecessary waste of resources. Further, because the cooling liquid is continuously supplied, the cooling liquid flows into the middle water pipe 222 after cooling in the small water pipe 223, then enters the large water pipe 221 through the water outlet hole 228, and finally is discharged from the water outlet 226.

[0050] Therefore, by individually controlling the flow of cooling liquid in each middle water pipe 222, independent adjustment of the cooling process of different areas of the upper mold 111 is achieved, ensuring uniform cooling and enhancing overall cooling efficiency.

[0051] In one embodiment, each control unit includes a first guide plate 311, a second guide plate 312, and a hinge shaft 323. The first guide plate 311 and the second guide plate 312 are arranged inside the large water pipe 221, and the first guide plate 311 is arranged close to and spaced apart from the water inlet hole 227; the two ends of the hinge shaft 323 are rotationally connected to the large water pipe 221, and the first guide plate 311 and the second guide plate 312 are hinged by the hinge shaft 323. Each control unit further includes a first limiting plate 321 and a second limiting plate 322, which are hinged, the first limiting plate 321 is hinged with the first guide plate 311, and the second limiting plate 322 is hinged with the second guide plate 312. The first guide plate 311, the second guide plate 312, the first limiting plate 321, and the second limiting plate 322 together form a first area.

[0052] In one of the embodiments, each sensing unit includes a first sensing piece 331, a gas transmission pipe 332 and a gas bag 333. The first sensing piece 331 is fixedly arranged in the middle water pipe 222 close to the water outlet hole 228. The cooling liquid flows into the middle water pipe 222 from the water inlet hole 227, then flows through the small water pipe 223, and then is discharged into the large water pipe 221 from the water outlet hole 228 of the middle water pipe 222. The first sensing piece 331 senses the temperature of the cooling liquid close to the water outlet hole 228, and indirectly reflects the actual temperature state of the cooling liquid inside the small water pipe 223 and the middle water pipe 222. The gas bag 333 is arranged in the first area, and abuts against the first guide plate 311, the second guide plate 312, the first limiting plate 321 and the second limiting plate 322. One end of the gas transmission pipe 332 is fixedly connected with the first sensing piece 331, and the other end is fixedly connected with the gas bag 333.

[0053] Specifically, when the temperature of the cooling liquid inside the middle water pipe 222 rises, the gas inside the first sensing piece 331 expands due to heat, and is transmitted to the gas bag 333 through the gas transmission pipe 332, so that the volume of the gas bag 333 increases. The expansion of the gas bag 333 drives the first limiting plate 321 and the second limiting plate 322 to rotate towards each other, and simultaneously drives the first guide plate 311 and the second guide plate 312 to rotate towards each other, so as to increase the opening angle between the water inlet hole 227 and the first guide plate 311, and further increase the flow of the cooling liquid.

[0054] When the temperature of the cooling liquid inside the middle water pipe 222 decreases, the gas inside the first sensing piece 331 shrinks due to cold, and is transmitted to the gas bag 333 through the gas transmission pipe 332, so that the volume of the gas bag 333 decreases. The contraction of the gas bag 333 drives the first limiting plate 321 and the second limiting plate 322 to rotate away from each other, and simultaneously drives the first guide plate 311 and the second guide plate 312 to rotate away from each other, so as to decrease the opening angle between the water inlet hole 227 and the first guide plate 311, and further decrease the flow of the cooling liquid.

[0055] Therefore, through the control of the volume of the corresponding gas bag 333 by each first sensing piece 331, the opening angle between the corresponding first guide plate 311 and the water inlet hole 227 is automatically adjusted according to the temperature of the cooling liquid, and the local independent adjustment of the cooling demand of different areas of the upper mold 111 is realized, so as to ensure the uniformity of cooling and enhance the overall cooling efficiency.

[0056] In one embodiment, each adjustment unit 310 further includes a push rod 335 and a second sensor 334. A hinge rod 324 is fixedly mounted on the second guide plate 312, and the push rod 335 is rotatably connected to the hinge rod 324. The second sensor 334 is fixedly mounted inside the large water pipe 221 near the outlet 226. Coolant flows into the middle water pipe 222 from the inlet 227, circulates through the small water pipe 223, and then flows into the large water pipe 221 from the outlet 228 of the middle water pipe 222, finally exiting from the outlet 226. Thus, the second sensor 334 indirectly reflects the actual temperature state of the overall coolant by sensing the temperature of the coolant at the outlet 226. The second sensing element 334 can drive the push rod 335 to slide along its own axis according to the temperature change of the coolant in the large water pipe 221, thereby driving the first guide plate 311, the second guide plate 312, the first limiting plate 321 and the second limiting plate 322 in each set of adjustment units 310 to rotate synchronously, so as to synchronously control the opening angle between the first guide plate 311 and the water inlet hole 227 in each set of adjustment units 310.

[0057] Specifically, when the second sensor 334 senses an increase in coolant temperature, the second sensor 334 drives the push rod 335 to slide to the left, that is... Figure 7 The push rod 335 rotates the second guide plate 312, connected to the push rod 335, to the left in a left-right direction. This, in turn, rotates the first guide plate 311, the first limiting plate 321, and the second limiting plate 322, all connected to the second guide plate 312, to the left in a left-right direction. This causes the opening angles of the water inlet 227 and the first guide plate 311 on the same side as the push rod 335 to decrease synchronously, resulting in a synchronous decrease in the flow rate of coolant entering the middle water pipe 222. Furthermore, the effect of the second sensor 334 in adjusting the opening angle is opposite to the effect of the local opening angle adjustment controlled by the first sensor 331. This achieves balanced control of the opening angles of the water inlet 227 and the first guide plate 311, thereby balancing the flow rate of coolant entering the middle water pipe 222 and avoiding uneven cooling caused by excessively fast or slow cooling rates in certain areas.

[0058] When the second sensor 334 senses a decrease in coolant temperature, it drives the push rod 335 to slide to the right. Figure 7The second guide plate 312 is connected with the pushing rod 335, and the pushing rod 335 is connected with the first guide plate 311. When the pushing rod 335 is driven to rotate to the right, the second guide plate 312 connected with the pushing rod 335 is driven to rotate to the right synchronously, and then the first guide plate 311, the first limiting plate 321 and the second limiting plate 322 connected with the second guide plate 312 are driven to rotate to the right synchronously, so that the water inlet hole 227 on the same side of the pushing rod 335 has a synchronous increasing trend of the opening angle with the first guide plate 311, and the cooling liquid flow into the middle water pipe 222 has a synchronous increasing trend.

[0059] Therefore, by controlling the opening angle between the first guide plate 311 on the same side of the second guide plate 334 and the water inlet hole 227, the logic of the second guide plate 334 adjusting the opening angle is opposite to that of the first guide plate 331 adjusting the opening angle, so that the dynamic balance of the opening angle between the first guide plate 311 and the water inlet hole 227 can be realized, thereby balancing the cooling liquid flow into the middle water pipe 222 and avoiding the problem of uneven cooling caused by too fast or too slow cooling rate in a local area.

[0060] In one embodiment, the control unit further comprises a pushing spring 336, one end of which is fixedly connected with the first guide plate 311, and the other end is fixedly connected with the second guide plate 312; the elastic force of the pushing spring 336 always makes the first guide plate 311 and the second guide plate 312 have a mutual moving trend away from each other.

[0061] In one embodiment, along the flow direction of the cooling liquid in the large water pipe 221, the elastic force of the pushing spring 336 in each control unit gradually decreases. Specifically, the cooling liquid gradually increases in temperature during heat exchange when flowing through the large water pipe 221, and the cooling liquid near the water outlet 226 also increases in temperature, resulting in a decrease in cooling effect of the cooling liquid near the water outlet 226 after entering the middle water pipe 222. To compensate for the problem of decreased cooling capacity of the cooling liquid near the water outlet 226, the elastic force of the pushing spring 336 in the control unit is gradually reduced along the flow direction of the cooling liquid in the large water pipe 221, so that the opening angle between the first guide plate 311 and the second guide plate 312 near the water outlet 226 is larger, thereby increasing the opening size between the corresponding water inlet hole 227 and the first guide plate 311, and thereby increasing the cooling liquid flow in the middle water pipe 222 near the water outlet 226. Therefore, the problem of too fast or too slow cooling in a local area caused by uneven cooling is effectively avoided, the stability and precision of the mold temperature control are improved, thereby ensuring the workpiece 133 forming quality and prolonging the service life of the mold.

[0062] In one of the embodiments, the lower mold 121 is internally provided with a second heat dissipation pipe assembly 220 and a second adjusting assembly, the second heat dissipation pipe assembly 220 has the same function as the first heat dissipation pipe assembly 210, the second adjusting assembly has the same function as the first adjusting assembly 300, and the second heat dissipation pipe assembly 220 is mirror-symmetrically arranged with the first heat dissipation pipe assembly 210 in the installation position. Therefore, the forming quality of the workpiece 133 and the service life of the upper mold 111 and the lower mold 121 are further ensured.

[0063] The technical features of the above embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

[0064] The above embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as the limitation of the scope of the present application. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A stamping device for automotive stamping parts, characterized in that, include: The upper mold, wherein an upper mold base is fixedly provided; The lower mold has a lower mold groove; the upper mold moves downward and cooperates with the lower mold, and the workpiece is formed during the process of the upper mold base and the lower mold groove being engaged; A cooling system, the cooling system including a first heat dissipation pipe assembly and a first adjustment assembly, both the first heat dissipation pipe assembly and the first adjustment assembly being disposed inside the upper mold; During the workpiece forming process, the first heat dissipation pipe assembly is used to cool the upper mold and the workpiece through the coolant; the first adjustment assembly is used to sense the temperature change of the coolant in real time to adjust the flow rate of the coolant. The first heat dissipation pipe assembly includes a main water pipe and multiple branch water pipes. Coolant is introduced into one end of the main water pipe and discharged from the other end. The multiple branch water pipes are arranged sequentially on both sides of the main water pipe along its axial direction, and both ends of each branch water pipe are connected to the main water pipe. During the cooling process, the first regulating component is used to regulate the flow rate of coolant entering the branch water pipes. The first heat dissipation pipe assembly includes a large water pipe, multiple medium water pipes, and multiple small water pipes. One end of the large water pipe is an inlet, and the other end is an outlet. The inlet is used to introduce coolant, and the outlet is used to discharge coolant. Multiple medium water pipes are spaced apart on both sides of the large water pipe. Each medium water pipe has an inlet at one end and an outlet at the other end, both of which are connected to the large water pipe. Multiple small water pipes are spaced apart, and both ends of each small water pipe are connected to the medium water pipes. The distances between the large water pipe, the medium water pipes, and the small water pipes and the upper mold base decrease progressively. During the cooling process, the first adjustment assembly is used to adjust the flow rate of coolant entering the medium water pipes and the small water pipes. The first adjustment component includes two sets of adjustment units, which are symmetrically arranged along the central axis of the large water pipe. Each set of adjustment units includes multiple control units and multiple sensing units. The control units are used to dynamically adjust the flow rate of the coolant through the inlet after the sensing units sense the temperature of the coolant in the middle water pipe. Each control unit includes a first guide plate, a second guide plate, and a hinge shaft. The first guide plate and the second guide plate are both disposed inside the large water pipe, with the first guide plate positioned close to and spaced apart from the water inlet. Both ends of the hinge shaft are rotatably connected to the large water pipe, and the first guide plate and the second guide plate are hinged together via the hinge shaft. Each control unit also includes a first limiting plate and a second limiting plate, which are hinged together, as are the first limiting plate and the first guide plate, and the second limiting plate and the second guide plate. The first guide plate, the second guide plate, the first limiting plate, and the second limiting plate together form a first region. When the temperature of the coolant in the middle water pipe changes, the sensing unit changes the area of ​​the first region, adjusting the opening angle between the water inlet and the first guide plate.

2. The stamping apparatus for automotive stamping parts according to claim 1, characterized in that, Each of the sensing units includes a first sensing element, a gas transmission pipe, and an air bag. The first sensing element is fixedly disposed inside the water pipe near the water outlet, and the air bag is disposed in the first area. One end of the gas transmission pipe is fixedly connected to the first sensing element, and the other end is fixedly connected to the air bag.

3. The stamping apparatus for automotive stamping parts according to claim 2, characterized in that, Each adjustment unit further includes a push rod and a second sensor. A hinge rod is fixedly mounted on the second guide plate, and the push rod is rotatably connected to the hinge rod. The second sensor is fixedly mounted inside the large water pipe near the water outlet. The second sensor can drive the push rod to slide along its own axis according to the temperature change of the coolant in the large water pipe.

4. The stamping apparatus for automotive stamping parts according to claim 1, characterized in that, The control unit also includes a push spring, one end of which is fixedly connected to the first guide plate and the other end of which is fixedly connected to the second guide plate; the elastic force of the push spring always causes the first guide plate and the second guide plate to have a tendency to move away from each other.

5. The stamping apparatus for automotive stamping parts according to claim 4, characterized in that, Along the flow direction of the coolant in the large water pipe, the elastic force of the push spring in each control unit gradually decreases.

6. The stamping apparatus for automotive stamping parts according to claim 1, characterized in that, The lower mold is equipped with a second heat dissipation pipe assembly and a second adjustment assembly. The first heat dissipation pipe assembly and the second heat dissipation pipe assembly are arranged in a mirror-symmetrical manner in terms of their installation positions.

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