阅读说明：本技术 塑料模具钢模块锻后冷却装置及锻后在线热处理的方法 (Cooling device for plastic die steel module after forging and on-line heat treatment method after forging ) 是由 唐国林 柯其棠 李进 贾余超 王佳友 李卫平 张永强 周立新 雷应华 于 2020-06-17 设计创作，主要内容包括：本发明提供一种塑料模具钢模块锻后冷却装置及锻后在线热处理的方法,若干所述雾炮机设置在所述塑料模具钢模块的周围,所述雾炮机能够对所述塑料模具钢模块进行喷雾冷却和鼓风冷却,所述喷雾冷却能够将所述塑料模具钢模块的温度冷却至300～350℃,所述鼓风冷却能够将所述塑料模具钢模块的温度冷却至190～210℃。本发明无需使用退火炉、淬火炉对塑料模具钢模块进行退火和淬火热处理,仅需要雾炮机即可完成回火前的热处理过程,节省了退火和淬火热处理的费用,节约了退火和淬火的时间,仅需要花费锻后喷雾冷却+鼓风冷却的时间,就可以实现对塑料模具钢模块进行锻后在线热处理。(The invention provides a cooling device for a plastic die steel module after forging and an on-line heat treatment method for the plastic die steel module after forging, wherein a plurality of fog gun machines are arranged around the plastic die steel module, the fog gun machines can carry out spray cooling and blast cooling on the plastic die steel module, the spray cooling can cool the temperature of the plastic die steel module to 300-350 ℃, and the blast cooling can cool the temperature of the plastic die steel module to 190-210 ℃. According to the invention, annealing and quenching heat treatment of the plastic die steel module is not required to be carried out by using an annealing furnace and a quenching furnace, and the heat treatment process before tempering can be completed only by using a fog gun machine, so that the cost of annealing and quenching heat treatment is saved, the time of annealing and quenching is saved, and the on-line heat treatment after forging of the plastic die steel module can be realized only by spending the time of spray cooling and blast cooling after forging.)

1. A cooling device for a plastic die steel module after forging is characterized by comprising a fog gun machine,

the fog gun machine is arranged around the plastic mould steel module and can carry out spray cooling and blast cooling on the plastic mould steel module, the spray cooling can cool the temperature of the plastic mould steel module to 300-350 ℃, and the blast cooling can cool the temperature of the plastic mould steel module to 190-210 ℃.

2. The post-forging cooling apparatus of a plastic mold steel module as recited in claim 1,

the fog gun machines are arranged in two rows, each row of the fog gun machines are arranged side by side, the two rows of the fog gun machines are respectively positioned at two sides of the plastic mould steel module,

preferably, the vertical distance between the two rows of fog gun machines is 7-12 m, the total arrangement width of each row of fog gun machines is more than or equal to 5m, and the number of the fog gun machines in each row is more than or equal to 5;

preferably, the total arrangement width of each row of fog gun machines is larger than the length of the plastic mould steel module.

3. The post-forging cooling apparatus of a plastic mold steel module as recited in claim 1,

the spray intensity of the fog gun machine during spraying is not lower than 7.5min m²。

4. The post-forging cooling apparatus of a plastic mold steel module as recited in claim 1,

the length direction of the plastic mould steel module is parallel to the arrangement direction of the fog gun machines, the width direction of the plastic mould steel module is perpendicular to the ground, and the thickness direction of the plastic mould steel module is perpendicular to the arrangement direction of the fog gun machines.

5. The post-forging cooling apparatus of a plastic mold steel module as recited in claim 1,

the width of the plastic die steel module is less than or equal to 1300mm, and the thickness of the plastic die steel module is less than or equal to 700 mm.

6. The post-forging cooling apparatus of a plastic mold steel module as recited in claim 1,

the plastic mould steel module comprises the following chemical components in percentage by mass:

c: 0.25 to 0.35%, Si: 0.10-0.60%, P: less than or equal to 0.02 percent, S: less than or equal to 0.01 percent, Cr: 1.10-2.10%, Mo: 0.25-0.50%, H: less than or equal to 0.0001 percent, and the balance of Fe and inevitable impurity elements.

7. The method for the post-forging on-line heat treatment of the plastic mold steel module using the cooling device as claimed in any one of claims 1 to 6, wherein the plastic mold steel module is forged to a desired size before the post-forging on-line heat treatment of the plastic mold steel module using the method, the method comprising the steps of:

1) transferring the forged plastic die steel module between two rows of fog gun machines;

2) carrying out spray cooling on the plastic mould steel module by using the fog gun machine;

3) carrying out blast cooling on the plastic mould steel module by using the fog gun machine;

4) and carrying out tempering heat treatment on the plastic mould steel module.

8. The method of claim 7,

in the step 1), the plastic die steel module is transferred to the middle position between the two rows of fog gun machines within 10min after the forging is completed.

9. The method of claim 7,

in the step 1), when the plastic mould steel module is transferred between two rows of fog gun machines, the length direction of the plastic mould steel module is parallel to the arrangement direction of the fog gun machines, the width direction of the plastic mould steel module is vertical to the ground, and the thickness direction of the plastic mould steel module is vertical to the arrangement direction of the fog gun machines.

10. The method of claim 7,

in the step 2), the spraying function is closed when the plastic mould steel module is cooled to 300-350 ℃ under the action of spraying;

and in the step 3), closing the air blowing function when the plastic mould steel module is cooled to 190-210 ℃ under the action of air blowing.

Technical Field

The invention relates to the technical field of heat treatment processes, in particular to a cooling device for a plastic die steel module after forging and an on-line heat treatment method after forging.

Background

With the increasingly wide application of plastic products in industry and daily life, the demand of the plastic mold industry for mold steel is increasing. After the plastic die steel module is forged, annealing heat treatment is usually needed to eliminate stress, and then quenching and tempering treatment is carried out to achieve the required mechanical property.

In the prior art, after the plastic die steel module is forged, the working procedures of annealing, quenching and high-temperature tempering heat treatment are required. The annealing is mainly for eliminating internal stress generated at the time of forging to prevent cracking and the like, and also for preparing for quenching. The quenching is to make the plastic die steel module obtain martensite or bainite structure, and the tempering is to stabilize the structure of the plastic die steel module and adjust the hardness of the plastic die steel module to achieve the required mechanical property index. The size of the steel die block of the plastic die is large, so that the heat treatment process after forging is various and the time is long.

Therefore, the on-line heat treatment technology after forging of the plastic die steel module with short flow and high efficiency is urgently needed to meet the quenching and tempering requirements.

Disclosure of Invention

The invention aims to provide a cooling device for a plastic die steel module after forging and an on-line heat treatment method after forging. The method utilizes forging waste heat to cooperate with a fog gun machine to carry out spray cooling and blast cooling on the forged plastic die steel module, replaces the heat treatment process of annealing, quenching and high-temperature tempering, can solve the problems of long flow, high cost and complex process of the heat treatment process of the plastic die steel module, and realizes short-flow and high-efficiency heat treatment to meet the mechanical property requirement.

In order to achieve the above purpose, the invention provides the following technical scheme:

the utility model provides a cooling device after forging of plastic mold steel module, includes fog gun machine, and is a plurality of fog gun machine sets up around the plastic mold steel module, fog gun machine can be right the plastic mold steel module carries out spray cooling and blast cooling, spray cooling can with the temperature of plastic mold steel module cools off to 300 ~ 350 ℃, blast cooling can with the temperature of plastic mold steel module cools off to 190 ~ 210 ℃.

Further, in the cooling device for the forged plastic die steel module, two rows of fog gun machines are arranged, wherein each row of fog gun machines are arranged side by side, the two rows of fog gun machines are respectively positioned at two sides of the plastic die steel module, preferably, the vertical distance between the two rows of fog gun machines is 7-12 m, the total arrangement width of each row of fog gun machines is more than or equal to 5m, and the number of the fog gun machines in each row is more than or equal to 5; preferably, the total arrangement width of each row of fog gun machines is larger than the length of the plastic mould steel module.

Further, in the cooling device after forging of the plastic die steel module, the spraying strength of the fog gun machine during spraying is not lower than 7.5min m²。

Further, in the cooling device for the forged plastic mold steel module, the length direction of the plastic mold steel module is parallel to the arrangement direction of the fog gun machines, the width direction of the plastic mold steel module is perpendicular to the ground, and the thickness direction of the plastic mold steel module is perpendicular to the arrangement direction of the fog gun machines.

Furthermore, in the cooling device for the plastic die steel module after forging, the width of the plastic die steel module is less than or equal to 1300mm, and the thickness of the plastic die steel module is less than or equal to 700 mm.

Further, in the cooling device for the plastic die steel module after forging, the plastic die steel module comprises the following chemical components in percentage by mass:

c: 0.25 to 0.35%, Si: 0.10-0.60%, P: less than or equal to 0.02 percent, S: less than or equal to 0.01 percent, Cr: 1.10-2.10%, Mo: 0.25-0.50%, H: less than or equal to 0.0001 percent, and the balance of Fe and inevitable impurity elements.

On the other hand, the method for performing on-line heat treatment on the plastic die steel module after forging by using the cooling device is provided, and the plastic die steel module is forged according to the required size before performing on-line heat treatment on the plastic die steel module after forging by using the method, and the method comprises the following steps of:

1) transferring the forged plastic die steel module between two rows of fog gun machines;

2) carrying out spray cooling on the plastic mould steel module by using the fog gun machine;

3) carrying out blast cooling on the plastic mould steel module by using the fog gun machine;

4) and carrying out tempering heat treatment on the plastic mould steel module.

Further, in the above method, in the step 1), the plastic mold steel module is transferred to an intermediate position between two rows of the fog gun machines within 10min after the completion of the forging.

Further, in the above method, in the step 1), when the plastic mold steel module is transferred between two rows of the fog gun machines, the length direction of the plastic mold steel module is parallel to the arrangement direction of the fog gun machines, the width direction of the plastic mold steel module is perpendicular to the ground, and the thickness direction of the plastic mold steel module is perpendicular to the arrangement direction of the fog gun machines.

Further, in the method, in the step 2), the spraying function is turned off when the plastic mold steel module is cooled to 300-350 ℃ under the action of spraying; and in the step 3), closing the air blowing function when the plastic mould steel module is cooled to 190-210 ℃ under the action of air blowing.

The analysis shows that the invention discloses a cooling device after forging of a plastic die steel module and a method for online heat treatment after forging, the invention does not need to use an annealing furnace and a quenching furnace to carry out annealing and quenching heat treatment on the plastic die steel module, only needs a fog gun machine to finish the heat treatment process before tempering, saves the cost of annealing and quenching heat treatment, saves the time of annealing and quenching, can realize the online heat treatment after forging on the plastic die steel module only by spending the time of spray cooling and blast cooling after forging, and has simple and easy implementation, low cost and high efficiency, and the mechanical property after treatment can meet the requirement of the plastic die steel module.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. Wherein:

fig. 1 is a schematic perspective view of an embodiment of the present invention.

Fig. 2 is a schematic front view of the structure according to an embodiment of the present invention.

Fig. 3 is a left side view of fig. 2.

Fig. 4 is a schematic top view of fig. 2.

Description of reference numerals: 1, a fog gun machine; 2 plastic mould steel module.

Detailed Description

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. The various examples are provided by way of explanation of the invention, and not limitation of the invention. In fact, it will be apparent to those skilled in the art that modifications and variations can be made in the present invention without departing from the scope or spirit thereof. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. It is therefore intended that the present invention encompass such modifications and variations as fall within the scope of the appended claims and equivalents thereof.

In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are for convenience of description of the present invention only and do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected," "connected," and "disposed" as used herein are intended to be broadly construed, and may include, for example, fixed and removable connections; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.

As shown in fig. 1 to 4, according to an embodiment of the present invention, there is provided a cooling device for a plastic mold steel module after forging, including a fog gun machine 1, wherein a plurality of fog gun machines 1 are disposed around a plastic mold steel module 2, the fog gun machine 1 has a spraying function and an air blowing function, the spraying function and the air blowing function can be operated simultaneously or independently, and forced cooling of the plastic mold steel module 2 after forging can be achieved, so that the plastic mold steel module 2 undergoes martensite or bainite tissue transformation. When the spraying function and the blowing function of the fog gun machine 1 are operated simultaneously, the plastic mould steel module 2 can be subjected to spray cooling, and when the blowing function of the fog gun machine 1 is operated independently, the plastic mould steel module 2 can be subjected to blowing cooling. And keeping the plastic mould steel module 2 to be cooled in fog in the process of carrying out spray cooling on the plastic mould steel module 2, and keeping blast cooling by closing the spray. The spray cooling can cool the temperature of the center of the large plane of the plastic die steel module 2 to 300-350 ℃ (such as 300 ℃, 305 ℃, 310 ℃, 315 ℃, 320 ℃, 325 ℃, 330 ℃, 335 ℃, 340 ℃, 345 ℃ and 350 ℃), and the plastic die steel module 2 generates bainite structure transformation when cooled to the temperature, and meanwhile, the spray cooling is stopped at the temperature because the cooling capacity of the spray cooling is stronger than that of the air cooling, so that the plastic die steel module 2 is prevented from cracking due to overlarge cooling strength of the temperature lower than 300 ℃. The blast cooling can cool the temperature of the center of the large plane of the plastic die steel module 2 to 190-210 ℃ (such as 190 ℃, 195 ℃, 200 ℃, 205 ℃ and 210 ℃), the bainite structure of the plastic die steel module 2 is completely transformed when the temperature is cooled to the temperature, the lower bainite structure is obtained, the required mechanical property is achieved, the tempering is prepared, the blast cooling is stopped at the temperature, the plastic die steel module 2 is prevented from cracking when the temperature is lower than 190 ℃, the plastic die steel module 2 is prevented from cracking, and the plastic die steel module 2 is not cooled to the lower temperature any more. The large plane center of the plastic mould steel module 2 refers to the geometric center of a plane formed by the width and the length of the plastic mould steel module 2, the temperature of the large plane center of the plastic mould steel module 2 is the highest, and the temperature can be measured at a fixed point through an infrared thermometer.

After the plastic mould steel module 2 is forged, the plastic mould steel module 2 is transferred to the middle of a plurality of fog gun machines 1, and the plastic mould steel module 2 is subjected to spray cooling and blast cooling in sequence by utilizing the spraying function and the blast function of the fog gun machines 1 so as to meet the mechanical property requirement.

Further, the fog gun machines 1 are arranged in two rows, the fog gun machines 1 in each row are arranged side by side, the two rows of fog gun machines 1 are respectively located on two sides of the plastic mould steel module 2, and the plastic mould steel module 2 is located in the middle position between the two rows of fog gun machines 1. The spraying directions of the two rows of fog gun machines 1 face the plastic mould steel module 2, preferably, the vertical distance between the two rows of fog gun machines 1 is 7-12 m, fog can be uniformly sprayed on the surface of the plastic mould steel module 2 within the distance range, the fog is nonuniform when the fog is close to the plastic mould steel module, and the cooling efficiency is reduced when the fog is far away. The vertical distance between the two rows of fog gun machines 1 can be adjusted within the range of 7-12 m according to the production condition, the total arrangement width of each row of fog gun machines 1 is more than or equal to 5m, the number of the fog gun machines 1 in each row is more than or equal to 5, and the number of the fog gun machines 1 can be increased according to the actual production condition; preferably, the total arrangement width of each row of fog gun machines 1 is larger than the length of the plastic mould steel module 2, and the thickness of the plastic mould steel module 2 is parallel to the spraying direction of the fog gun machines 1.

Further, the spray intensity of the mist gun 1 during spraying is to prevent insufficient cooling from causing insufficient texture transformation, resulting in insufficient performance. The spraying intensity of the fog gun machine 1 during spraying is not lower than 7.5L/min m²Preferably 7.5 to 9.5L/min m²The cooling liquid in the fog gun machine 1 contains water. So set up and to make the tissue change abundant, guarantee that the performance of plastic mold steel module 2 meets the requirements.

The width of the plastic mould steel module 2 is less than or equal to 1300mm, and the thickness is less than or equal to 700 mm. The plastic mould steel module 2 comprises the following chemical components in percentage by mass: c: 0.25 to 0.35%, Si: 0.10-0.60%, P: less than or equal to 0.02 percent, S: less than or equal to 0.01 percent, Cr: 1.10-2.10%, Mo: 0.25-0.50%, H: less than or equal to 0.0001 percent, and the balance of Fe and inevitable impurity elements. The length direction of the plastic mould steel module 2 is parallel to the arrangement direction of the fog gun machine 1, the width direction of the plastic mould steel module 2 is perpendicular to the ground, and the thickness direction of the plastic mould steel module 2 is perpendicular to the arrangement direction of the fog gun machine 1. The thickness of the plastic mold steel module 2 is not larger than the width of the plastic mold steel module 2 by default, the largest plane of the plastic mold steel module 2 can be perpendicular to the fog cooling and air cooling directions by the arrangement, and the fog and the blast cooling contact the largest plane, so that the fastest cooling rate is realized during the fog cooling and the air cooling.

The invention also discloses a method for carrying out on-line heat treatment on the plastic die steel module 2 after forging by using the cooling device, wherein the plastic die steel module 2 is required to be forged according to the required size before the on-line heat treatment is carried out on the plastic die steel module 2 after forging by using the method. The method utilizes the spraying function and the air blowing function of the fog gun machine 1 to realize the forced cooling of the forged plastic die steel module 2, so that the plastic die steel module 2 generates martensite or bainite structure transformation, and after the forced cooling, the tempering heat treatment is carried out on the plastic die steel module 2, thereby completing the whole heat treatment process required after the forging of the plastic die steel module 2.

The method comprises the following steps:

1) transferring the forged plastic die steel module 2 between two rows of fog gun machines 1;

2) carrying out spray cooling on the plastic mould steel module 2 by utilizing the spraying function of the fog gun machine 1;

3) carrying out blast cooling on the plastic mould steel module 2 by using the blast function of the fog gun machine 1;

4) and (4) carrying out tempering heat treatment on the plastic mould steel module 2.

The method utilizes the fog gun machine 1 to spray and carry out fog cooling and blast cooling on the forged plastic die steel module 2, replaces the heat treatment process of annealing, quenching and high-temperature tempering in the prior art, can solve the problems of long flow, high cost and complex process of the heat treatment process of the plastic die steel module 2, and realizes a short-flow and high-efficiency heat treatment technology.

Further, the plastic mold steel module 2 consists of the following chemical components in percentage by mass: c: 0.25 to 0.35%, Si: 0.10-0.60%, P: less than or equal to 0.02 percent, S: less than or equal to 0.01 percent, Cr: 1.10-2.10%, Mo: 0.25-0.50%, H: less than or equal to 0.0001 percent, and the balance of Fe and inevitable impurity elements.

Furthermore, the width of the plastic mould steel module 2 is less than or equal to 1300mm, and the thickness is less than or equal to 700 mm.

Further, in step 1), the plastic mold steel module 2 is transferred to an intermediate position between the two rows of fog gun machines 1 within 10min after completion of forging. By the arrangement, the forging waste heat can be fully utilized to be matched with the fog gun machine 1 to carry out spray cooling and blast cooling on the plastic die steel module 2, so that the heat treatment process before tempering is completed, and the plastic die steel module 2 is subjected to martensite or bainite tissue transformation.

Further, in the step 1), when the plastic mold steel module 2 is transferred between the two rows of fog gun machines 1, the length direction of the plastic mold steel module 2 is parallel to the arrangement direction of the fog gun machines 1, the width direction is perpendicular to the ground, and the thickness direction is perpendicular to the arrangement direction of the fog gun machines 1. The thickness of the plastic mold steel module 2 is not larger than the width of the plastic mold steel module 2 by default, the largest plane of the plastic mold steel module 2 can be perpendicular to the fog cooling and air cooling directions by the arrangement, and the fog and air blast cooling contact the largest plane, so that the fastest cooling rate is realized during the spray cooling and the air blast cooling.

Further, in the step 2), when the plastic mold steel module 2 is cooled to 300-350 ℃ under the action of spraying, the spraying function is closed, and the spraying time of the fog gun machine 1 generally needs 1-540 min.

Further, in the step 3), when the plastic mold steel module 2 is cooled to 190-210 ℃ under the action of air blowing, the air blowing function is closed, and the air blowing time of the fog gun machine 1 generally needs 1-180 min.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

according to the invention, annealing and quenching heat treatment of the plastic die steel module 2 is not required to be carried out by using an annealing furnace and a quenching furnace, the heat treatment process before tempering can be completed only by using the fog gun machine 1, the cost of annealing and quenching heat treatment is saved, the annealing and quenching time is saved, and the on-line heat treatment after forging of the plastic die steel module 2 can be realized only by spending the time of spray cooling and blast cooling after forging.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.