WO2011063622A1

WO2011063622A1 - Hot stamping female die assembly, hot stamping male die assembly and hot stamping die

Info

Publication number: WO2011063622A1
Application number: PCT/CN2010/071244
Authority: WO
Inventors: 单忠德; 张密兰; 姜超; 许应
Original assignee: 机械科学研究总院先进制造技术研究中心
Priority date: 2009-11-24
Filing date: 2010-03-24
Publication date: 2011-06-03
Also published as: DE112010004536B4; DE112010004536T5; CN101716629A; CN101716629B

Abstract

A hot stamping female die assembly consists of a female die (11) with an integral structure and a concave cooling supporting block (12). The female die and the concave cooling supporting block lock each other, and the female die is provided with water inlet pipelines at one longitudinal end and with water outlet pipelines at the other longitudinal end. At least one cooling water pipeline (13) corresponding in shape with the working surface of the female die is set between the working surface of the female die and the concave cooling supporting block. Said cooling water pipelines are connected with the water inlet pipelines and the water outlet pipelines, respectively. Said hot stamping female die assembly with an integral structure has a more simple working procedure and longer life than a segmented die, of which the uniform cooling can provide uniform tissues and performances of forming parts, avoid low strength points, reduce forming residual stress and obtain good forming quality. A hot stamping male die assembly and a hot stamping die are also provided.

Description

Hot stamping die assembly, hot stamping punch assembly and hot stamping die This application claims to be submitted to the Chinese Patent Office on November 24, 2009, application number 200910223586.7, entitled "Integral cooling pipe hot stamping" The priority of the Chinese Patent Application, the entire disclosure of which is incorporated herein by reference.

Technical field

The present invention relates to the field of hot stamping forming technology, and more particularly to a hot stamping die assembly, and to a hot stamping punch assembly and a hot stamping die.

Background technique

The global energy crisis and environmental problems have intensified, making energy conservation, environmental protection and safety the main development direction of the automobile manufacturing industry. Ultra-high-strength steel has the dual advantages of reducing the weight of the car body and improving safety. The usage in the vehicle manufacturing industry has increased significantly year by year.

Ultra-high-strength steel sheets have higher yield stress and tensile strength than ordinary steel sheets, and the forming properties are worse than those of ordinary steel sheets, and the higher the strength, the more difficult the forming. Under normal temperature conditions, the high-strength steel plate requires a large punching force, is prone to cracking, and has a strong rebound.

Hot stamping technology is a new technology specially used for forming high-strength steel plate and ultra-high-strength steel plate stamping parts. The formed parts can obtain strength of 1500MPa or more, high forming precision, and basically no rebound. It is used for automobile security parts and structural parts. As well as important parts for other occasions, it can improve the safety performance of the car, reduce the weight of the car body and fuel economy performance, and become the focus of the industry. The hot stamping technology heats the ultra-high-strength steel sheet above the austenitizing temperature and fully heats it, and its plasticity and ductility increase, and the yield strength rapidly decreases. At this time, it is rapidly formed in the forming and quenching integrated mold and high strength is obtained. The martensite structure is obtained to obtain a hot stamping member having high forming precision and high strength. The forming and quenching of steel sheets are all done in hot stamping dies, so hot stamping dies technology is one of the keys to hot stamping technology.

In order to ensure the cooling rate above 25 °C / s to ensure martensite transformation, and to ensure uniform cooling of the surface of the part to make the part structure and performance uniform, avoid low-intensity points, reduce forming residual stress, ensure the forming quality, hot stamping The design of the mold's cooling system is very important.

At present, the hot stamping die mainly uses boreholes in the concave and convex molds as cooling pipes, and the external water circulation system forms cooling water paths. At present, such large and complex molds are segmented molds, and the molds are first divided into several parts and then connected. . This type of segmented mold is complicated in connection and assembly, and the die life is relatively low; there are deficiencies in the cooling method, because the surface shape complicated parts often have curved surfaces, and the conventional drilling method Only straight holes can be machined, which will make the distance between the cooling pipe and the surface of the concave and convex molds unequal, resulting in uneven cooling, which will ultimately affect the quality of the formed part, and drilling cooling sometimes requires two directions to form an angled surface. Cooling, difficult to process, will also cause the cooling water to flow poorly, forming eddy currents and reflux, and cooling effect.

Summary of the invention

A first object of the present invention is to provide a hot stamping die assembly having a unitary structure, which has a single process life and a longer service life than the segmented mold, and the hot stamping The die assembly is cooled and hooked to make the structure and performance of the formed part hook, avoiding low strength points, reducing forming residual stress, and high forming quality.

A second object of the present invention is to provide a hot stamping punch assembly.

A third object of the present invention is to provide a hot stamping die.

In order to achieve the above first object, the present invention provides a hot stamping die assembly comprising an EJ mold having an integral structure and an EJ cooling support block, the EJ mold being fastened to the EJ cooling support block, One end of the longitudinal direction of the die is provided with a water inlet pipe, and the other end of the longitudinal direction is provided with a water outlet pipe; between the die working face and the concave cooling support block, a shape corresponding to the shape of the working face of the die is provided. There is less than one cooling water pipe, and the cooling water pipe is respectively connected to the water inlet pipe and the water outlet pipe.

Preferably, the top of the concave cooling support block is provided with no less than one support protrusion and a cooling groove, and the support protrusion is spaced apart from the cooling groove, and the shape of the cooling groove is The shape of the working surface of the die is adapted, and the support protrusion, the cooling EJ groove and the bottom of the EJ die working surface form the cooling water pipe.

Preferably, the water inlet pipe comprises a straight cooling pipe extending longitudinally along the die, a transverse cooling pipe extending laterally along the die, and no less than one inner cooling pipe extending longitudinally along the EJ die, the straight cooling pipe, The horizontal cooling duct and the inner cooling duct are sequentially connected, and the inner cooling duct is in communication with the cooling water duct.

Preferably, the inner cooling duct communicates with the cooling water pipe through an inner shunting chamber and an inner shunting groove disposed on the female mold.

Preferably, the water outlet pipe includes an end cavity extending laterally along the die, and a water outlet communicating with the end cavity, the end cavity being in communication with the cooling water pipe.

Preferably, the EJ mold base and the corresponding position of the EJ cooling support block base are sealed. a groove, a sealing ring is arranged in the sealing groove.

Preferably, the number of the sealing rings is two.

Preferably, the cross-sectional dimensions of the water inlet pipe, the cooling water pipe, and the water outlet pipe gradually decrease along the flow direction of the cooling water.

The hot stamping W die assembly provided by the invention comprises an EJ die and an EJ cooling support block which are interlocked with each other, and the EJ die is a die with a monolithic structure, and the connection of the die can be finished compared with the segmented die. In the assembly process, the life of the die is relatively long; a cooling water pipe is provided between the die working face and the concave cooling support block, and the shape of the cooling water pipe is adapted to the shape of the working face of the die. The distance between the cooling water pipe and the working surface of the die is substantially equal, ensuring the cooling with the shape, so that the cooling of the working surface of the die is more uniform, effectively reducing the residual stress of the forming part, avoiding the generation of low-strength points, and ensuring the structure of the forming part. Uniform performance, can improve the quality of the molded parts.

In order to achieve the above second object, the present invention provides a hot stamping punch assembly, comprising a punch having a unitary structure and a convex cooling support block, the punch being engaged with the convex cooling support block, One end of the longitudinal direction of the punch is provided with a water inlet pipe, and the other end of the longitudinal direction is provided with a water outlet pipe; and between the working face of the punch and the convex cooling support block, a shape corresponding to the shape of the working surface of the punch is not provided. There is less than one cooling water pipe, and the cooling water pipe is respectively connected to the water inlet pipe and the water outlet pipe.

Preferably, the top of the convex cooling support block is provided with no less than one support protrusion and a cooling EJ slot, and the support protrusion is spaced apart from the cooling EJ slot, and the shape of the cooling EJ slot is The shape of the working surface of the punch is adapted, and the support protrusion, the cooling EJ groove and the bottom of the punch working surface form the cooling water pipe.

Preferably, the water inlet pipe comprises a straight cooling pipe extending longitudinally along the convex die, a transverse cooling pipe extending laterally along the convex die, and no less than one inner cooling pipe extending longitudinally along the convex die, the straight cooling pipe, The horizontal cooling duct and the inner cooling duct are sequentially connected, and the inner cooling duct is in communication with the cooling water duct.

Preferably, the inner cooling duct communicates with the cooling water pipe through an inner splitting chamber and an inner splitting trough disposed on the convex cooling support block.

Preferably, the water outlet pipe includes an end cavity extending laterally along the male die, and a water outlet communicating with the end cavity, the end cavity being in communication with the cooling water pipe.

Preferably, the punch base and the corresponding position of the convex cooling support base are sealed. a groove, a sealing ring is arranged in the sealing groove.

Preferably, the number of the sealing rings is two.

The hot stamping punch assembly provided by the invention comprises a punching die and a convex cooling support block which are mutually engaged, and the punching die is a punching die having a monolithic structure, and the connection of the die can be compressed compared with the segmented die. In the assembly process, the life of the punch is relatively long; a cooling water pipe is provided between the punch working face and the convex cooling support block, and the shape of the cooling water pipe is adapted to the shape of the working face of the punch. The distance between the cooling water pipe and the working surface of the punch is substantially equal, and the cooling with the shape is ensured, so that the cooling of the working surface of the punch is more uniform, the residual stress of the formed part is effectively reduced, the generation of low-strength points is avoided, and the structure of the formed part is ensured. Uniform performance, can improve the quality of the molded parts.

In order to achieve the above third object, the present invention also provides a hot stamping die comprising the above-described hot stamping die assembly, hot stamping punch assembly, due to the above-described hot stamping die assembly, The hot stamping punch assembly has the above technical effects, and the hot stamping die composed of the above-mentioned hot stamping die assembly and hot stamping punch assembly should also have corresponding technical effects.

Preferably, the cooling water conduit of the hot stamped EJ die assembly is staggered with the cooling water conduit of the hot stamping punch assembly.

Preferably, the water inlet pipe and the water outlet pipe of the hot stamping EJ die assembly are oppositely arranged with the water inlet pipe and the water outlet pipe of the hot stamping punch assembly.

DRAWINGS

1 is a schematic structural view of a specific embodiment of a hot stamping W die assembly provided by the present invention;

2 is a schematic structural view of a W mold working surface of FIG. 1;

3 is a schematic structural view of the internal structure of the W mode in FIG. 1;

Figure 4 is a schematic structural view of the EJ cooling support block of Figure 1;

Figure 5 is a schematic structural view of a specific embodiment of a hot stamping punch assembly provided by the present invention;

Figure 6 is a schematic view showing the structure of the working surface of the punch in Figure 5;

Figure 7 is a schematic structural view of the internal structure of the punch in Figure 5; Figure 8 is a schematic structural view of the convex cooling support block of Figure 5;

Figure 9 is a longitudinal cross-sectional view showing a specific embodiment of a hot stamping die according to the present invention; Figure 10 is a transverse cross-sectional view of the hot stamping die of Figure 9;

Among them, Figure 1 - Figure 10:

Die 11, straight cooling pipe 111, horizontal cooling pipe 112, inner cooling pipe 113, inner splitter

114, water outlet 115, concave cooling support block 12, support protrusion 121, cooling groove 122, cooling water pipe 13, internal shunt cavity 14, end cavity 15, sealing ring 16;

The punch 21, the direct cooling duct 211, the horizontal cooling duct 212, the inner cooling duct 213, the water outlet 214, the convex cooling support block 22, the support protrusion 221, the cooling groove 222, the inner shunt groove 223, the cooling water pipe 23, and the seal Circle 24;

The die 31, the cooling water pipe 311, the concave cooling support block 32, the punch 33, the cooling water pipe 331, and the convex cooling support block 34.

detailed description

One of the cores of the present invention is to provide a hot stamping die assembly having a unitary structure, which has a single process life and a longer service life than the segmented mold, and the hot stamping concave The mold assembly is evenly cooled, so that the microstructure and performance of the formed part are uniform, avoiding low strength points, reducing forming residual stress, and high forming quality. A second core of the invention is to provide a hot stamping punch assembly. A third core of the present invention is to provide a hot stamping die.

The present invention is described in the following with reference to the accompanying drawings. The following description is merely exemplary and explanatory, and should not be construed as limiting the scope of the invention.

Please refer to FIG. 1. FIG. 1 is a schematic structural view of a specific embodiment of a hot stamping die assembly according to the present invention.

As shown in FIG. 1, the hot stamping W die assembly provided by the present invention comprises an EJ die 11 and an EJ cooling support block 12, the EJ die 11 is a unitary structure, the EJ cooling support block 12 has a protrusion and a base, and the EJ cooling support block The protrusion of 12 can be inserted into the cavity at the bottom of the die 11, the protrusion abuts the working surface of the die 11, the base of the EJ cooling support block 12 can be attached to the base of the EJ die 11, and the EJ die 11 and EJ are cooled. The supporting block 12 forms a snap-fit connection; the longitudinal end of the die 11 is provided with a water inlet pipe, and the other end of the longitudinal direction is provided with a water outlet pipe; the working face of the die 11 and the concave cooling support block 12 are provided with not less than one a cooling water pipe 13 extending longitudinally of the die 11 and having the shape and concave of the cooling water pipe 13 The shape of the working face of the die 11 is adapted such that the distance between the cooling water pipe 13 and the working face of the die 11 is substantially equal; the cooling water pipe 13 is in communication with the water inlet pipe and the water outlet pipe, respectively.

In a preferred embodiment, the female die 11 and the concave cooling support block 12 are matched by a tapered surface. The structure allows the W die 11 to closely fit the EJ cooling support block 12, and if the mating surface wears, the EJ cools the mating portion of the support block. It can be used after trimming, which can extend the life of the mold.

The die 11 is matched with the assembly of the concave cooling support block 12, and may also be thermally assembled by using a die heating to utilize the property of thermal expansion and contraction, or may be assembled by a transition fit to achieve close contact between the die 11 and the cold support block 12. Cooperate.

The hot stamping die assembly of this structure can process the joining, assembling and the like of the die in comparison with the segmented die, and the life of the die 11 is relatively long; the working face of the die 11 and the concave cooling support block 12 A cooling water pipe 13 having a number of not less than one is provided, and the shape of the cooling water pipe 13 is adapted to the shape of the working face of the die 11, so that the distance between the cooling water pipe 13 and the working face of the die 11 is substantially equal. The shape cooling is ensured, the cooling of the working surface of the die is more uniform, the residual stress of the formed part is effectively reduced, the generation of low-strength points is avoided, the structure and performance of the formed part are ensured, and the quality of the formed part can be improved.

As shown in FIG. 2, FIG. 3 and FIG. 4, in a specific embodiment, the top of the protrusion of the concave cooling support block 12 is provided with not less than one support protrusion 121 and cooling groove 122, and supports The protrusion 121 is spaced apart from the cooling groove 122; the support protrusion 121, the cooling groove 122 and the bottom of the working surface of the die 11 form a cooling water pipe 13; the support protrusion 121 can be used to bear the impact force during the hot stamping process, Supporting action; The shape of the cooling groove 122 is adapted to the shape of the working face of the die 11 such that the cooling water flowing through the cooling groove 122 is substantially equal to the working face of the die 11 to ensure uniform cooling.

This structure will form the support protrusions 121 of the cooling water pipe 13, and the cooling grooves 122 are disposed on the concave cooling support block 12, and are not disposed at the bottom of the working surface of the die 11, thereby maximally saving the difficulty of mold processing, and at the same time The cooling support block 12 is made of non-die steel, which saves mold material.

It will be understood that the support projections 121 and the cooling recesses 122 forming the cooling water pipe 13 may be provided at the bottom of the working surface of the die 11, and such a structure is also within the scope of the present invention.

In a specific embodiment, the water inlet pipe includes a straight cooling pipe 111 extending longitudinally along the die 11, a transverse cooling pipe 112 extending laterally along the die 11, and no less than one extending longitudinally along the die 11. Inner cooling duct 113, straight cooling duct 111, transverse cooling duct 112, inner cooling duct 113 is sequentially connected, and the inner cooling duct 113 is in communication with the cooling water duct 13.

In the water inlet pipe of this structure, the cooling water entering from the straight cooling pipe 111 first enters the horizontal cooling pipe 112 having a larger volume, and then enters each inner cooling pipe 113 at an equal flow rate, thereby avoiding the cooling water near the direct cooling pipe. The significant difference between the flow rate and the flow rate of the cooling water in the farther portion makes the flow rate of the cooling water entering the cooling water pipe 13 equal, avoiding the phenomenon of uneven cooling.

The inner wall of one side of the die 11 is provided with not less than one inner shunt groove 114, and each inner shunt groove 114 is respectively connected to the cooling water pipe 13, and the EJ cooling support block 12 and the inner wall of the EJ die 11 form an inner shunt cavity 14, In a specific embodiment, the inner cooling duct 113 is in communication with the cooling water conduit 13 through the inner splitting chamber 14 and the inner splitting tank 114 in sequence. The structure can make the cooling water flowing out from the inner cooling pipe 113 firstly buffered in the inner volume dividing chamber 14 having a larger volume, and then enter the inner dividing groove 114 and the cooling water pipe 13 at equal flow rates, thereby ensuring entry into each cooling. The flow rates of the cooling water of the pipe 13 are substantially equal, so that the working face of the die 11 is cooled more uniformly.

In a specific embodiment, the water outlet pipe may include an end cavity 15 extending laterally along the die, and a water outlet 115 communicating with the end cavity, the end cavity 15 being in communication with the cooling water pipe 13. .

The direct cooling duct 111 and the water outlet 115 can respectively be connected to the cooling water circulation system through a hose, and the cooling water flows in from the straight cooling duct 111, through the horizontal cooling duct 112, the inner cooling duct 113, the inner shunting chamber 14, the inner shunting tank 114, and the cooling. The water pipe 13, the end cavity 15, flows out from the water outlet 115, and the cooling water is cooled by heat exchange to cool the mold to quench the formed part.

In a preferred solution, in order to prevent leakage of the cooling water during the heat exchange process, the corresponding positions of the base of the die 11 and the base of the EJ cooling support block 12 are provided with a sealing groove, and the sealing groove 16 is provided in the sealing groove.

In a more preferred solution, the number of the sealing rings 16 is two, and the EJ mold 11 and the EJ cooling support block 12 are double-sealed, which improves the sealing effect and effectively prevents the cooling water from leaking.

In a preferred solution, in order to make the cooling water meet the full filling condition during the flow process, the cross-sectional dimensions of the water inlet pipe, the cooling water pipe 13, and the water outlet pipe are gradually decreased along the flow direction of the cooling water, so that the cooling efficiency is approximately equal everywhere. .

The hot stamping die assembly is cooled, and the die 11 and the concave cooling support block 12 are required to have water corrosion resistance and are less likely to rust. In a preferred embodiment, each cooling water passage can be subjected to rustproof treatment. The concave cooling support block 12 does not directly contact the hot formed part, and is less affected by the temperature, and therefore, the concave cooling support block 12 Thermodynamic properties can be disregarded when selecting materials. Only material strength requirements should be considered when selecting materials and structures and dimensions.

The present invention also provides a hot stamping punch assembly, please refer to FIG. 5 to FIG. 8. FIG. 5 is a schematic structural view of a hot stamping punch assembly according to an embodiment of the present invention; FIG. 5 is a schematic structural view of a convex working surface; FIG. 7 is a schematic structural view of the internal structure of the convex mold of FIG. 5; FIG. 8 is a structural schematic view of the convex cooling supporting block of FIG.

As shown in FIG. 5, the hot stamping punch assembly provided by the present invention comprises a punch 21 having a unitary structure and a convex cooling support block 22, the punch 21 being engaged with the convex cooling support block 22, and the longitudinal end of the punch 21 The water inlet pipe is provided, and the other end of the longitudinal direction is provided with a water outlet pipe; between the working surface of the punch 21 and the convex cooling support block 22, there is not less than one cooling water pipe 23 adapted to the shape of the working surface of the punch 21, The cooling water pipe 23 is in communication with the water inlet pipe and the water outlet pipe, respectively.

As shown in FIG. 6 , FIG. 7 and FIG. 8 , in a specific embodiment, the top of the convex cooling support block 22 is provided with no less than one support protrusion 221 , a cooling groove 222 , and a support protrusion 221 . The cooling grooves 222 are spaced apart, and the shape of the cooling grooves 222 is adapted to the shape of the working surface of the punch 21. The support protrusions 221, the cooling grooves 222 and the bottom of the working surface of the punch 21 form the cooling water pipe 23.

In a specific embodiment, the water inlet pipe includes a straight cooling pipe 211 extending longitudinally along the male die, a transverse cooling pipe 212 extending laterally along the male die, and at least one internal cooling extending longitudinally along the male die. The pipe 213, the direct cooling pipe 211, the horizontal cooling pipe 212, and the inner cooling pipe 213 are sequentially connected, and the inner cooling pipe 213 is in communication with the cooling water pipe 23.

The inner wall of the convex cooling support block 22 is provided with not less than one inner shunting groove 223, and each inner shunting groove 223 is respectively connected with the cooling water pipe 23, and the convex cooling supporting block 22 and the inner wall of the punch 21 form an inner shunting cavity. 24. In a specific embodiment, the inner cooling duct 213 is in communication with the cooling water conduit 23 through the inner splitting chamber 24 and the inner splitting tank 223 in sequence.

The water outlet conduit includes an end cavity extending laterally along the male mold 21 and a water outlet 214 communicating with the end cavity, the end cavity being in communication with the cooling water conduit 23.

Preferably, a corresponding position of the base of the punch 21 and the base of the convex cooling support block 22 is provided with a sealing groove, and a sealing ring 24 is disposed in the sealing groove. The number of seals 24 can be two.

Preferably, the cross-sectional dimension of the water inlet pipe, the cooling water pipe 23, and the water outlet pipe gradually decreases along the flow direction of the cooling water. The hot stamping punch assembly provided in this embodiment is similar to the structure and concept of the hot stamping EJ mold assembly described above, and the rest of the specific implementation process will not be described in detail herein.

The present invention also provides a hot stamping die, please refer to FIG. 9, FIG. 10, FIG. 9 is a longitudinal cross-sectional view of a specific embodiment of the hot stamping die provided by the present invention; FIG. 10 is a hot stamping die of FIG. Horizontal section view.

As shown in Fig. 9 and Fig. 10, the hot stamping die provided by the present invention comprises a hot stamping die assembly and a hot stamping punch assembly. The hot stamping EJ mold is generally the hot stamping EJ mold assembly described in the above embodiments, and specifically includes a concave mold 31 and a concave cooling support block 32. The specific structure of the hot stamping female mold is not described in detail herein; The hot stamping punch is always the hot stamping punch assembly described in the above embodiments, and specifically includes a punch 33 and a convex cooling support block 34. The structure of the hot stamping punch assembly will not be described in detail herein.

In a preferred embodiment, in order to improve the cooling effect of the hot stamping die and avoid the cooling dead zone, as shown in FIG. 10, the cooling water pipe 311 of the hot stamping W die assembly is alternately distributed with the cooling water pipe of the hot stamping punch assembly. The structure can make the forming of the EJ mold 31 and the punch 33 more uniform in cooling, and the cooling effect is better, and the cooling dead zone does not occur.

In a preferred solution, in order to reduce the influence of the temperature difference of the cooling water in the flowing process on the cooling effect, the water inlet pipe and the water outlet pipe of the hot stamping EJ die assembly are opposite to the water inlet pipe and the water outlet pipe of the hot stamping punch assembly. To the arrangement, this structure compensates for the effect of the cooling water temperature difference on the cooling effect, resulting in a more uniform cooling of the formed part.

Since the above-mentioned hot stamping die assembly and hot stamping punch assembly have the above technical effects, the hot stamping die composed of the above-mentioned hot stamping die assembly and hot stamping punch assembly should also have corresponding technical effects. I will not go into details here.

The above is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It should be considered as the scope of protection of the present invention.

Claims

Rights request

A hot stamping die assembly, comprising: a die having a unitary structure and a concave cooling support block, said die being engaged with said concave cooling support block, said longitudinal end of said die The water inlet pipe is provided, and the other end of the longitudinal direction is provided with a water outlet pipe; between the die working surface and the concave cooling support block, there is not less than one cooling water adapted to the shape of the working surface of the die a conduit, the cooling water conduit being in communication with the water inlet conduit and the outlet conduit, respectively.

2 . The hot stamping die assembly according to claim 1 , wherein the top of the concave cooling support block is provided with no less than one supporting protrusion and a cooling EJ slot, and the supporting protrusion and the seat are Cooling EJ groove spacing, the shape of the cooling groove is adapted to the shape of the working face of the die, the support protrusion, the cooling EJ groove and the bottom of the EJ die working surface form the cooling water pipeline.

The hot stamping die assembly according to claim 2, wherein the water inlet pipe comprises a straight cooling pipe extending longitudinally along the EJ die, a transverse cooling pipe extending transversely along the EJ die, and not less than one The inner cooling duct extending in the longitudinal direction of the EJ die, the straight cooling duct, the horizontal cooling duct, and the inner cooling duct are sequentially connected, and the inner cooling duct is in communication with the cooling water pipeline.

The hot stamping die assembly according to claim 3, wherein the inner cooling duct communicates with the cooling water pipe through an inner splitting chamber and an inner splitting groove provided on the female mold.

The hot stamping die assembly according to claim 4, wherein the water outlet pipe comprises an end cavity extending laterally along the die, and a water outlet communicating with the end cavity. The end cavity is in communication with the cooling water conduit.

The hot stamping die assembly according to claim 1 , wherein a corresponding position of the die base and the EJ cooling support block base is provided with a sealing groove, and the sealing groove is provided with a sealing ring.

The hot stamping die assembly according to claim 6, wherein the number of the seal rings is two.

The hot stamping die assembly according to claim 1, wherein a cross-sectional dimension of the water inlet pipe, the cooling water pipe, and the water outlet pipe gradually decreases along a flow direction of the cooling water.

A hot stamping punch assembly, comprising: a punch having a unitary structure and a convex cooling support block, wherein the punch is engaged with the convex cooling support block, and one end of the punch is longitudinally The water inlet pipe is provided, and the other end of the longitudinal direction is provided with a water outlet pipe; between the punch working surface and the convex cooling support block, there is not less than one cooling water adapted to the shape of the working surface of the punch Pipe, the cooling water pipe And communicating with the water inlet pipe and the water outlet pipe respectively.

The hot stamping punch assembly according to claim 9, wherein the top of the convex cooling support block is provided with not less than one support protrusion and a cooling W groove, and the support protrusion and the support The cooling groove is spaced apart, the shape of the cooling groove is adapted to the shape of the working surface of the punch, and the supporting protrusion, the cooling EJ groove and the bottom of the working surface of the punch form the cooling water pipeline.

The hot stamping punch assembly according to claim 10, wherein the water inlet pipe comprises a straight cooling pipe extending longitudinally along the convex die, a transverse cooling pipe extending laterally along the convex die, and not less than one The inner cooling pipe extending longitudinally along the convex die, the straight cooling pipe, the horizontal cooling pipe, and the inner cooling pipe are sequentially connected, and the inner cooling pipe is in communication with the cooling water pipe.

The hot stamping punch assembly according to claim 11, wherein the inner cooling duct is connected to the cooling water pipe through an inner shunting chamber and an inner shunting groove provided on the convex cooling supporting block. .

The hot stamping punch assembly according to claim 12, wherein the water outlet pipe comprises an end cavity extending laterally along the punch, and a water outlet communicating with the end cavity. The end cavity is in communication with the cooling water conduit.

The hot stamping punch assembly according to claim 9, wherein a corresponding position of the punch base and the convex cooling support block base is provided with a sealing groove, and the sealing groove is provided with a seal ring.

The hot stamping punch assembly according to claim 14, wherein the number of the seal rings is two.

The hot stamping punch assembly according to claim 9, wherein a cross-sectional dimension of the water inlet pipe, the cooling water pipe, and the water outlet pipe gradually decreases in a flow direction of the cooling water.

A hot stamping die comprising the hot stamping die assembly of any one of claims 1-8, and the hot stamping punch assembly of any of claims 9-16.

The hot stamping die according to claim 17, wherein the cooling water pipe of the hot stamping die assembly is alternately distributed with the cooling water pipe of the hot stamping punch assembly.

The hot stamping die according to claim 17, wherein the water inlet pipe and the water outlet pipe of the hot stamping die assembly are opposite to the water inlet pipe and the water outlet pipe of the hot stamping punch assembly Settings.