KR20100063911A - Apparatus for measuring wear property of hot press forming tool - Google Patents

Abstract

PURPOSE: An apparatus for measuring the abrasion properties of hot press molding is provided to recognize the abrasion properties on an actual mold material since some conditions similar to actual hot press processes, such as heating, air cooling and the contact with a mold are added. CONSTITUTION: An apparatus for measuring the abrasion properties of hot press molding comprises a heating part(120), a pressing part(130), and a abrasion introducing part(140). The heating part heats the abrasion introducing part having the same physical property to a molded object at the temperature of the molded object in hot press forming. The mold material manufactured with an actual mold is installed at the pressing part. The pressing part presses the abrasion introducing part of the mold material to cause the abrasion of the mold material. An abrasion introducing part placing member(141) on which the abrasion introducing member is put is prepared for the abrasion introducing part. The abrasion introducing part placing member causes the abrasion of the mold material in the state the mold material makes contact with the abrasion introducing part by the pressing part.

Description

Apparatus for measuring wear characteristics of hot press dies {APPARATUS FOR MEASURING WEAR PROPERTY OF HOT PRESS FORMING TOOL}

The present invention relates to a measuring apparatus for evaluating the wear characteristics of a hot press die to enable the design and manufacture of a mold having optimized processing conditions in an actual process.

In general, the hot press method is to form a cold state by heating the raw material (plate) to a temperature capable of austenite transformation. In this case, for example, by using a heating device such as an oven, a chamber, induction heating, etc., the molded object is heated to a temperature region where austenite transformation is possible for a predetermined time, and then transferred to the mold in air to be molded into a mold, and the molding The finished product is cooled in the mold.

As described above, when molding is performed by a hot press process, the mold may be abraded by contact with the heated object and friction. In particular, in the case of a high-strength material to be molded, the degree of wear of the mold may occur more severely, and accordingly, the error rate of the product may be determined according to the life of the mold.

That is, it is necessary to manufacture a mold from a material having appropriate strength and durability according to physical properties such as strength, hardness or durability of the molded object to be molded. If the mold is made of a material having high strength and durability for hot press molding of a low strength molded object, it is disadvantageous in terms of equipment cost. In addition, when a mold is manufactured from a material having low strength and durability for molding a high-molded object, there is a problem that the life of the mold is shortened.

In order to measure the wear amount of the mold, it is best to measure the wear state of the mold while forming a large amount of the molded object in the actual process, but it takes much time to obtain the proper mold design conditions, There is a problem that the required amount of the molding and the mold of various materials must be manufactured.

On the other hand, when the over / smallness of the wear characteristic of the mold is not judged more accurately, uncertainty such as durability or strength of the designed and manufactured mold increases, and the design may be excessively or excessively smaller than the required design specification.

Therefore, there is a need for a study that can more easily facilitate specification selection of a mold material having appropriate physical properties (eg, wear characteristics, etc.) according to the material of the molding.

The present invention is made by recognizing at least one of the needs or problems occurring in the conventional hot press die.

One object of the present invention is to grasp the wear state of the mold material to select the appropriate mold specifications according to the physical properties of the molding.

Another object of the present invention is to obtain a result regarding the realistic wear characteristics of the mold material.

Another object of the present invention is to be able to be given the heating, air cooling and contact conditions with the mold similar to the actual hot press process to determine the wear characteristics of the actual mold material.

Another object of the present invention is to minimize the overlapping contact area with the wear-inducing member which is the molding material causing the wear of the mold material in order to determine the wear characteristics of the mold material.

Another object of the present invention is to be able to apply the history about the heat given to the actual hot pressing process to determine the wear characteristics of the mold material.

Still another object of the present invention is to enable a large amount of mold material to be measured in a short time in order to grasp the characteristics of the mold material more accurately.

An apparatus for measuring wear characteristics of a hot press die according to an embodiment for realizing at least one of the above problems may include the following features.

The present invention is basically configured to cause the wear of the mold material in the condition given the conditions occurring in the actual hot pressing process, and to configure the proper mold specifications according to the properties of the molding according to the characteristics of the wear state Based on that.

An apparatus for measuring abrasion characteristics of a hot press die according to an embodiment of the present invention includes a heating unit for heating a wear-inducing member having physical properties of a molding to a temperature of the molding during actual hot press molding; A mold material which is manufactured as an actual mold is mounted, and a pressing force providing unit presses the wear causing member of the mold material to cause wear of the mold material; The wear-inducing member seating portion on which the wear-inducing member is mounted is provided, and the wear-inducing member seating portion is configured to cause wear of the mold material in a state in which the mold material is brought into contact with the wear-inducing member by the pressing force providing unit. It may be configured to include.

In addition, the heating unit includes: a heating furnace for heating the wear-inducing member having the physical properties of the molding to be heated to a temperature for actual hot press molding, in order to heat the wear-inducing member seated on the wear-inducing unit; It may be configured to include another heating furnace for heating the wear-inducing member to maintain the temperature of the state in which the wear-inducing member is transferred to the mold to be molded. In this case, the two heating furnaces may be configured to move up and down for transport of the wear-inducing member.

On the other hand, the wear-inducing member may be provided with a wear-inducing member seating portion to be arranged in each heating furnace. In this case, the wear-inducing member seating portion may be mounted to the rotating deck, the rotating deck is configured to be rotatable by the power supply, so that the wear-inducing member heated to the temperature for the actual hot press forming is provided with a pressing force providing portion It may also be configured to be transported to a position.

On the other hand, the pressing force providing unit may be further provided with a position moving unit for moving the pressing force providing unit so that the position of the mold material for pressing the wear-inducing member rotated.

In this case, the position moving part may be configured such that the mold material moves from the center position of the wear causing member to the end position. Alternatively, the position moving part may be configured to linearly move the pressing force providing part so that wear may be caused while the mold material moves from the end position of the wear causing member to the center position.

Meanwhile, the pressing force providing unit may further include a cooling passage for cooling the mold material in a region where the mold material is mounted. On the other hand, the heating unit may be further provided with a nitrogen input unit.

As described above, according to the present invention, the wear state of the mold material constituting the actual mold may be grasped to select an appropriate mold specification according to the physical properties of the molding.

In addition, according to the present invention, conditions such as heating, air cooling, and contact with a mold, which are similar to the actual hot press process, may be added to determine the wear characteristics of the actual mold material.

In addition, according to the present invention, it is possible to minimize the overlapping contact area with the wear-inducing member which is the material to be molded to cause the wear of the mold material can be more accurately grasp the wear characteristics of the mold material.

In addition, according to the present invention, it becomes possible to apply the history of the heat given to the actual hot pressing process, so that the wear characteristics of the mold material can be more accurately grasped.

In addition, according to the present invention, the measurement of a large amount of the mold material for grasping the characteristics of the mold material more accurate can be made quickly.

In addition, according to the present invention, it is possible to more accurately and accurately determine the wear characteristics of the actual mold material, it is possible to manufacture a mold suitable for the characteristics of the molding to be molded.

In addition, according to the present invention, it is possible to manufacture a mold suitable for the characteristics of the molding to be molded to optimize the life of the mold, it is also possible to improve the quality of the molded product.

In addition, according to the present invention, it is possible to efficiently produce a mold suitable for the characteristics of the molding to improve the productivity, it is possible to reduce the cost according to the design and manufacture of the mold.

In order to help the understanding of the features of the present invention as described above, it will be described in more detail with respect to the wear characteristics measuring apparatus of the hot press die according to the embodiment of the present invention.

Hereinafter, exemplary embodiments will be described based on embodiments best suited for understanding the technical characteristics of the present invention, and the technical features of the present invention are not limited by the illustrated embodiments, It is to be understood that the present invention may be implemented as illustrated embodiments. Accordingly, the present invention may be modified in various ways within the technical scope of the present invention through the embodiments described below, and such modified embodiments fall within the technical scope of the present invention. In addition, in order to help the understanding of the embodiments described below, in the reference numerals described in the accompanying drawings, among the components that will perform the same function in each embodiment, related components are denoted by the same or extension numbers.

Embodiments related to the present invention basically cause the wear of the mold material under the conditions given in the actual hot pressing process, and select the proper mold specification according to the properties of the molding according to the characteristics of the wear state It is based on being configured to be.

As shown in Figure 1, the wear characteristic measuring apparatus 100 of the hot press die according to an embodiment of the present invention is heated to heat the wear-inducing member 20 to a certain temperature in any one region of the main body 110 Part 120 is provided, the pressing force providing unit 130 is configured to press the mold material 10 to be measured to induce wear on the wear-inducing member 20 to the wear-inducing member 20 And, it may be configured to include a wear-inducing unit 140 is mounted by the mold material 10 is a wear-inducing member 20 is mounted to cause the wear on the mold material 10.

In this case, the wear-inducing member 20 is provided with a member having physical properties (materials) of the molding to be formed through an actual hot pressing process so as to confirm a requirement of a mold suitable for the molding to be actually formed. The mold material 10 may be provided as a member having physical properties (materials) constituting the mold used in the actual hot pressing process.

On the other hand, the heating unit 120 may be configured to heat the wear-inducing member 20 having the physical properties of the molding to the temperature of the molding to be placed in the mold in the actual state during the hot press molding. In this case, the heating unit 120 may include at least one or more heating furnaces 121, and the heating unit 121 may be configured in the form of a chamber having a heating space. In addition, the heating furnace 121 may be coupled to the heating furnace mounting unit 123 provided with the power providing unit 122 to be movable to a position for heating the wear causing member 20.

For example, the power providing unit 122, as shown, is composed of a cylinder coupled to the heating rod mounting portion 123 to the rod end, the heating furnace 121 is mounted to the heating furnace mounting portion 123 is It may be configured to move up and down by driving of the cylinder. By this operation, the wear-inducing member 20 may be positioned inside the heating space of the heating furnace 121 or may be configured to be exposed to the outside.

The heating unit 120, which may be configured as described above, may include a wear-inducing member such that a history of the temperature of the shaped object heated in the actual hot pressing process, that is, a heating temperature of the shaped object may be applied to the wear-inducing member 20. 20) may be heated.

On the other hand, the wear-inducing unit 140 is provided with a seating portion 141 on which the wear-inducing member 20 is seated, and is driven by a power transmission member 142a to allow the seating portion 141 to rotate. It can also be configured to provide a rotational force from the study (143). For example, the wear-inducing member 20 may be made of a disc-like structure, and the seating portion 141 may be made of a turntable-like structure so that the wear-inducing member 20 may be placed thereon. have.

As described above, the mold material 10 which is worn in contact with the wear causing member 20 rotated and provided in the wear causing unit 140 is detachably mounted to the pressing force providing unit 130 so that the wear causing member ( 20) may be configured to be pressed to one side. That is, the pressure inducing member 20 may cause wear by providing a pressing force so that the mold material 10 is pressed on one surface of the wear causing member 20 to be rotated.

For example, the pressing force providing unit 130 may be of a lever type for the seesaw movement. In this case, as shown, the mounting portion 132 to which the mold material 10 is detachably mounted at one end is coupled to the support portion 131 which forms the rotation axis, and the mold material 10 is mounted on the support portion 131. On the opposite end, the power supply unit 133 may be mounted such that the mounting unit 132 rotates at an angle around the support unit 131. The power provider 133 may be made of a device such as a cylinder.

On the other hand, the pressing force providing unit 130 is further provided with a holder 132a at the end of the mounting portion 132, as shown in Figure 3a and 3b, the mold material 10 is removable to the holder 132a. It can also be configured to be mounted. On the other hand, the pressing force providing unit 130 may be further provided with a cooling passage 134 for cooling the mold material 10 in the end region of the mounting portion 132 on which the mold material 10 is mounted. If the holder 132a is further provided, the refrigerant inlet 134a and the outlet 134b of the cooling passage 134 may be configured to be connected to the area of the holder 132a.

According to the above configuration, the pressing force providing unit 130 is intended to contact the mold material 10 with the friction causing member 20, and the mounting unit 132 is driven by the driving of the power providing unit 133. The mold material 10 may operate to press the wear-inducing member 20 while rotating at a predetermined angle in one direction (clockwise in the city) about the 131. In addition, after the wear induction time (or section) set for the mold material 10 ends, the mounting part 132 is driven in the opposite direction with respect to the support part 131 by driving the power supply part 133. It can be rotated at a certain angle in the counterclockwise) to the mold material 10 is spaced apart from the wear causing member (20).

On the other hand, as shown in Figure 2, the wear-inducing unit 140 is further provided with a rotating deck 144, the seating portion 141 is mounted on the rotating deck 144 is configured to be moved You may. For example, when two seating parts 141 are provided, and the heating furnace 121 is provided at a corresponding position, the two seating parts 141 are opposite to each other by the rotation of the rotating deck 141. The heating furnace 121 may be moved to a position where the wear-inducing member 20 is heated by each heating furnace 121. The rotating deck 144 may be configured to be rotatable in combination with the power providing unit 145 composed of a means such as a motor as shown.

In this case, any one of the heating furnace 121, the heating furnace 121 may be configured to heat so that the actual temperature of the molded object is applied to the wear-inducing member 20. In addition, the other heating unit 121 may be configured to heat (or insulate) such that the temperature of the molded object is applied to the wear-inducing member 20 while being molded by the mold during the actual hot press molding. Meanwhile, the heating unit 121 may further include a nitrogen input unit 121a to prevent oxidation of the wear causing member 20 in the same manner as the actual process.

By this configuration, the mounting portion 141 is rotated by the rotating deck 144, the wear-inducing member 20 is heated to a temperature for the actual molding by the heating furnace 121, then the actual molding During the heating process, it may be moved to a position of another one of the heating furnaces 121 which heats to the temperature maintained in the object.

In this case, one end of the support 131 on which the mold material 10 is mounted is the upper end of the wear-inducing member 20 in another heating furnace 121 that is heated to a temperature maintained in the molding during actual molding. It may be configured to be located in.

On the other hand, while the wear-inducing member 20 heated to the temperature for molding by the rotation of the rotating deck 144 is moved to the position of the mold material 10 while the actual molding is moved to the position of the mold for molding Conditions such as air cooling may be provided.

1 and 2, the pressing force providing unit 130 is further provided with a position moving unit 150 such that the position where the mold material 10 contacts the wear causing member 20 is displaced. It can also be configured to be. In this case, the pressing force providing unit 130, the support portion 131 and the power providing unit 133 is coupled to the mounting portion 130a, the position moving portion is coupled to the mounting portion 130a position of the pressing force providing portion 130 May be configured to move.

As illustrated, the position moving unit 150 is slidably provided along the transfer rail 153 provided in the mounting unit 130a on the main body 110, and the transfer cart 152 is mounted on the mounting unit 130a. Is provided may be configured to move along the feed shaft 151 constituting the position moving unit 150. In this case, the feed shaft 151 may be configured to provide power from the power supply unit 154 through the power transmission unit 154a. In addition to the above configuration, the position moving unit 150 may be configured to move simply by a power providing means such as a cylinder.

On the other hand, the position moving unit 150 may be further provided with a positioning unit 155. The positioning unit 155 may include a sensing unit 155a disposed at a predetermined interval to determine a distance to which the mold material 10 should be moved. In this case, a detection target member 155b may be further provided at any one position of the mounting unit 130a to configure the detection by the detection unit 155a more easily.

As shown in FIGS. 3A and 3B, the pressing force providing unit 130 is positioned at the center of the wear causing member 20 while the wear causing member 20 is rotated by the configuration of the position moving unit 150. The mold material 10 may move from the end position to cause wear. In contrast, the mold material 10 may be caused to wear while moving from the end position of the wear-inducing member 20 to the center portion.

By this operation, the contact surface between the wear-inducing member 20 and the mold material 10 may be caused to wear in a state that does not overlap as much as possible. For example, the trace between the mold material 10 and the wear-inducing member 20 may be formed in the form of a spiral trace by the linear movement of the mold material 10 and the rotation of the wear-inducing member 20. have.

By the above configuration, the operation of the optimum state of the wear characteristic measuring apparatus 100 of the hot press die, as shown in Figure 4a to 4c, the wear-inducing member (1) in one heating furnace 121 20) is heated to the temperature for actual molding. For example, when the temperature required for molding is 900 ° C., the wear-inducing member 20 is heated to the required temperature (see FIGS. 4A and 4B).

Then, the heating furnace 121 is raised to open the seating portion 141, and then moved to the position of the other heating furnace 121 to cause wear by the rotation of the rotary deck 144. In this case, the wear-inducing member 20 is exposed to the outside air can be applied to a state in which the air cooling is formed during the actual molding.

The wear-inducing member 20 transferred to the position of the heating furnace 121 in which the pressure is applied by the mold material 10 by the pressing force providing unit 130 is maintained at a temperature maintained during actual molding (heating). (See FIGS. 4A and 4C). For example, when the required temperature is 730 ° C, the temperature of the wear-inducing member 20 may be maintained at the required temperature by the heating furnace 121, and thus the wear-inducing member ( As the mold 20 rotates, the mold material 10 is pressed against the wear causing member 20 to cause wear. At the same time, the mold material 10 is moved from the position of the center portion of the wear-inducing member 20 to the position of the end portion by the operation of the position shifting part 150, and wear is performed.

During the wear of the mold material 10, the refrigerant flows through the cooling passage 134 for cooling conditions applied to the actual mold so that the mold material 10 may be worn while being kept at a temperature during actual molding. have.

After completing such a wear process, the actual object to be measured is the degree of wear of the mold material (10). As shown in FIG. 5, in order to determine wear characteristics of the mold material 10, information such as diameter, height, volume, and the like of the wear area 10a is measured to determine wear characteristics of the mold material 10.

Through this process, it is possible to select a mold material suitable for the molded object by measuring the mold material of various steel grades.

For example, as shown in Figure 6, when the wear degree of the material "A" of the mold material is 1, the mold material of the material "B" is about 0.57, the material is "C" to It can be seen that the mold material of "E" has a wear degree of about 0.2 to 1.2. As described above, the wear characteristics of various steel materials may be measured and data may be measured, and the mold materials may be manufactured by selecting the steel materials suitable for the physical properties of the molding to be molded using such data.

The wear characteristic measuring apparatus of the hot press mold according to the present invention is not limited to the embodiments of the wear characteristic measuring apparatus of the hot press mold described above, but the above embodiments may be modified so that various modifications can be made. All or part of the embodiments may be optionally combined.

1 is a front sectional view schematically showing a structure of an apparatus for measuring wear characteristics of a hot press die according to an embodiment of the present invention.

FIG. 2 is a plan sectional view schematically illustrating a structure of an apparatus for measuring wear characteristics of a hot press die illustrated in FIG. 1.

Figure 3a is a partial cross-sectional view schematically showing an initial state to induce wear by pressing the mold material to the wear-inducing member.

Figure 3b is a partial cross-sectional view schematically showing a rolling state for inducing wear by pressing the mold material to the wear-inducing member.

4A is a graph showing an example of a temperature history applied when the mold material is worn through the wear characteristic measuring apparatus of the hot press die according to an embodiment of the present invention.

FIG. 4B is a graph showing the relationship between the temperature condition in which the object is heated over time for molding in the temperature history shown in FIG. 4A.

FIG. 4C is a graph showing the relationship with the conditions regarding the temperature of the shaped part over time while the shaped part is molded for molding among the temperature history shown in FIG. 4A.

5 is a view showing a state of the mold material worn by the wear characteristic measuring apparatus of the hot press die according to an embodiment of the present invention.

6 is a graph showing a wear characteristic result of comparing and evaluating the wear of the mold materials measured by the wear characteristic measuring apparatus of the hot press die according to an embodiment of the present invention.

* Description of the main parts of the drawings *

10 ... mold material 20 ... wear causing member

100 ... wear-measuring device 110 ... body

120 ... heating section 121 ... heating furnace

121a ... nitrogen input 122,133,143,145,154 ... power supply

123,130a, 132 ... Mounting part 130 ... Pressure providing part

132a ... Holder 134 ... Cooling passage

140 ... Wear causing parts 141 ... Seating parts

142a, 154a ... power transmission section 144 ... rotating deck

150 ... Positioning unit 151 ... Feed axis

152 ... Feed cart 153 ... Feed rail

Claims (8)

A heating unit for heating the wear-inducing member having the physical properties of the molding to the temperature of the molding during actual hot press molding; A mold material which is manufactured as an actual mold is mounted, and a pressing force providing unit presses the wear causing member of the mold material to cause wear of the mold material; The wear-inducing member seating portion on which the wear-inducing member is mounted is provided, and the wear-inducing member seating portion is rotated to cause wear of the mold material in a state in which the mold material is in contact with the wear-inducing member by the pressing force providing unit. The wear characteristic measuring apparatus of the hot press die, characterized in that comprises; According to claim 1, wherein the heating portion for heating the wear causing member seated on the wear causing portion, One furnace for heating the wear-inducing member having the physical properties of the molding to a heated temperature for actual hot press molding; And another heating furnace for heating the wear-inducing member to maintain the temperature at which the wear-inducing member is transferred to the mold to be molded. Apparatus for measuring the wear characteristics of the hot press die, characterized in that the two heating furnaces are configured to be lowered for transport of the wear-inducing member. According to claim 2, wherein the wear-producing portion is provided with a wear-inducing member seating portion to be disposed in each heating furnace, the wear-inducing member seating portion is mounted to the rotary deck, causing the wear caused to the temperature for the actual hot press molding Apparatus for measuring wear characteristics of a hot press die, characterized in that the rotating deck is configured to be rotatable by the power supply unit so that the member is conveyed to the position where the pressing force providing unit is disposed. According to claim 1, wherein the pressing force providing unit is measured wear characteristics of the hot press mold further comprises a position moving unit for moving the pressing force providing unit so that the position of the mold material for pressing the wear-inducing member is rotated. Device. The pressurizing device of claim 4, wherein the position shifter provides the pressing force so that the mold material moves from the center position of the wear-inducing member to the end position or the mold material moves from the end position of the wear-inducing member to the center position. Apparatus for measuring wear characteristics of a hot press die, characterized in that configured to move the part linearly. The hot pressing apparatus according to any one of claims 1, 3, 4 and 5, wherein the pressing force providing unit further includes a cooling passage for cooling the mold material in a region where the mold material is mounted. Abrasion characteristic measuring device of press mold. The apparatus of claim 1 or 2, wherein the heating unit further includes a nitrogen input unit. The apparatus of claim 4, wherein the position moving unit further comprises a positioning unit.

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