JPWO2018083814A1 - Hot press processing apparatus and hot press processing method - Google Patents

Abstract

Even if it is configured to perform trimming processing on a blank material in a high temperature state, by eliminating the occurrence of burrs in the press-molded product, the deburring work performed after molding is eliminated, reducing the work man-hours and extending the product Reduce costs. During the press molding process of shaping the blank 3 while clamping the die 1 to the punch 2, the elastic force of the spring component 9 causes the trim portion 3 a to be interposed between the trim presser step 6 and the cut holder 8. Hold in the attached state. As the press molding operation of the die 1 proceeds, the cut holder 8 receives the pressing force of the trim presser step portion 6 and opposes the elastic force of the spring constituting body 9, along the outer peripheral edge portion 5 b of the punch side molding surface portion 5. By moving the trimming blade 7 relatively, the trimming blade 7 cuts off by trimming the trim portion 3a between the outer peripheral edge portion 5b of the punch side molding surface portion 5 and the tip corner portion 5c.

Description

  The present invention relates to a hot press working apparatus that heats a steel blank to its quenching temperature, shapes the heated blank using a low-temperature mold and quenches the blank, and its hot press. The present invention relates to a hot press processing method using an apparatus.

  In the hot press processing, the blank material to be shaped is heated to a quenching temperature (austenite temperature) of 750 to 1000 ° C., and is introduced into a mold in a heated state and molded. The heated blank is hardened and quenched by being rapidly cooled by a low-temperature mold immediately before the mold is clamped and transformed into a martensite structure. Therefore, the hot press process can produce a high-strength press-molded product at a low cost without an independent quenching process. Therefore, it is suitable for vehicle body parts manufactured by press molding such as automobile door impact beams or center pillars, and thus has been widely adopted.

  In the hot press processing, when manufacturing such a vehicle body part or the like, it is necessary to perform punching processing or trimming processing of a trim portion which is a surplus portion on the blank material. The hardness of the blank material is significantly increased by quenching. Therefore, when such punching or trimming is performed after quenching of the blank material, high residual stress is generated on the shearing surface of the blank material due to punching or trimming, and delayed fracture occurs in the press-formed product after molding. There is a concern that it will happen.

  Therefore, the problem of delayed fracture in such a press-formed product after molding can be solved by performing drilling or trimming with a laser on the blank material after quenching.

  However, when performing drilling or trimming with a laser on a blank after quenching, it is necessary to introduce dedicated laser equipment. In addition, laser processing time is added. Therefore, the cost of the press-formed product is also a factor.

  Therefore, in order to solve the problem of delayed destruction by such laser processing and high product cost due to the introduction of dedicated equipment, conventionally, a hot material has been devised to perform these processing while the blank material is heated, that is, uncured. A plurality of press forming techniques have been proposed (for example, Patent Document 1 and Patent Document 2).

  As a hot press processing apparatus that realizes such a hot press forming technique, for example, a hot press processing apparatus that shapes the shape of a press-formed product having a hat-shaped cross section can be cited. As shown in FIGS. 5 to 8, this hot press working apparatus is configured to have a die including a die a as a movable die and a punch b as a fixed die. The die a has a concave fitting portion d formed at the center portion of the die side molding surface portion c. The punch b has a raised portion f formed in accordance with the recessed fitting portion d at the center of the punch side molding surface portion e. The outer edge h of the punch-side molding surface part e constitutes a trimming tool i in cooperation with the trimming blade g formed on the outer edge of the die-side molding surface c.

  As shown in FIG. 5, the conventional hot press processing apparatus configured as described above first introduces a blank material j heated to the quenching temperature between the die side molding surface portion c and the punch side molding surface portion e. .

  Next, the die a is moved toward the punch b, the concave fitting portion d of the die side molding surface portion c is fitted to the raised portion f of the punch side molding surface portion e, and the blank material j is molded.

  When the die a is further moved with respect to the punch b to perform the molding of the blank material j and the mold clamping is performed, as shown in FIG. 6, the protruding portion k is formed in a predetermined shape on the blank material j. While being formed gradually, the trimming blade g of the die side molding surface portion c comes into contact with the blank material j.

  As shown in FIG. 7, protrusions to the blank material j are obtained by further moving the die a to the punch b side from the state in which the trimming blade g of the die side molding surface portion c is in contact with the blank material j. The formation of the part k further proceeds. In addition, after the blank material j abuts on the outer edge h of the punch-side molding surface part e, the surplus margin at the peripheral edge of the blank material j is obtained by the cooperation of the outer edge h and the trimming blade g. The trimming process is started by bending the trim part m as a part.

  Then, in the process of further moving the die a with respect to the punch b, the trim part m is pulled from the blank material j and cut (broken) by the cooperation of the trimming blade g and the outer edge part h, and trimming is performed. Processing ends (state shown in FIG. 8).

  Thereafter, in a state where the die a and the punch b are finally clamped, the blank material j is rapidly cooled and quenched and hardened by being cooled by a cooling device (not shown). Thereby, the blank material j is shape | molded by the cross-sectional hat type | mold which has the projection part which has a predetermined shape, and a press molded product is completed.

  Therefore, the conventional hot press molding technique is a technique in which the blank material is also heated to its quenching temperature, and the heated steel material is shaped and quenched by a die composed of a low-temperature die a and punch b. . Trimming with the trimming tool i is performed in an uncured state during press molding of the blank material with such a mold.

As a result, the trimming process performed during hot press molding is performed on a blank material that has not yet been quenched and hardened at a high temperature, so that the residual stress generated in the trimmed part can be reduced. Thus, the effect of eliminating the occurrence of delayed fracture can be demonstrated.
Patent Document 1 JP 2005-248253 A Patent Document 2 JP 2011-92946 A

Challenges to be solved

  However, in any of these conventional hot press processing techniques, when trimming is performed, trimming of the trim portion m is performed while the trim portion m remains in a non-holding state where the punch b is not supported, that is, in a so-called hollow cut state. Processing is in progress.

  In the trimming process of cutting the trim portion m by the aerial cutting, the trim portion m is left in the non-holding state. As a result, in the process of cutting the trim portion m by bending it with the trimming tool i, the blank material j “Burr” is formed on the cut surface existing on the component side of the press-formed product.

  Since the press product with the “burrs” formed in this way cannot be used for actual use, the worker performs a deburring operation as a post-operation outside the press molding process after press molding, It is necessary to remove the burr.

  As a result, the completed press-formed product has increased man-hours due to the addition of the manual work, which has been a cause of high costs. Since the burr is quenched and cured together with the press-formed product, the deburring operation becomes more difficult. From this point, the cost of the press-formed product is increased.

  Therefore, the present invention eliminates the occurrence of burrs in the press-formed product due to the trimming process in the hot press molding process even when the trimming process is performed on the blank material in a high temperature state. Accordingly, there is provided a hot press working apparatus and a hot press working method capable of eliminating the deburring work performed after molding, reducing the work man-hours, and reducing the cost of the product.

General disclosure

  A hot press working apparatus according to an aspect of the present invention is a press molding that shapes a preheated blank material into a shape of a press-molded product by clamping a punch having a molding surface portion and a die having a molding surface portion. Means may be included. The said hot press processing apparatus may have a trim part cutting means which trims the trim part as a surplus part which is a structure outside part of the said press-molded product in the said blank material. The hot press processing apparatus may include quench hardening means for quenching and hardening the heated blank material by rapidly cooling when the punch and the die are clamped. The trim part cutting means may include a trim presser step portion that is formed so as to protrude toward the punch side at an outer peripheral edge portion of the die side molding surface portion. The trim part cutting means has a trimming tool comprising a trimming blade formed at the tip corner at the inner peripheral edge of the trim presser step and a tip corner formed at the outer peripheral edge of the punch-side molding surface. You can do it. The trim part cutting means may include a cut holder disposed along an outer peripheral edge of the punch side molding surface so as to face the trim presser step. The trim partial cutting means is provided on the punch side, and supports the cut holder so as to be able to approach and separate from the trim presser step portion in a state where the cut holder is elastically biased toward the trim presser step portion side. You may have a body. During the press molding step of molding a blank material while clamping the die against the punch by the press molding means, the trim portion is placed between the trim presser step portion and the cut holder of the spring structure. You may clamp in the state to which the elastic force was provided. As the press molding operation of the die proceeds, the cut holder is subjected to the pressing force of the trim presser step portion and the cut holder is opposed to the elastic force of the spring structure body along the outer peripheral edge portion of the punch side molding surface portion. By moving the trimming blade relatively, the trimming blade may be cut off by shearing the trim portion between the front edge corner portion of the outer peripheral edge portion of the punch-side molding surface portion. The quench hardening means may quench the blank material by final clamping of the punch and the die after the trim part is cut by the trim part cutting means.

  Moreover, the hot press processing method which concerns on 1 aspect of this invention is a hot press processing method using the hot press processing apparatus. The hot press processing apparatus may include a press molding means for shaping a preheated blank material into a shape of a press-molded product by clamping a punch having a molding surface portion and a die having a molding surface portion. The hot press processing apparatus may include trim part cutting means for trimming a trim part which is a surplus part which is a part outside the structure of the press-formed product in the blank material. The hot press processing apparatus may include quench hardening means for quenching and hardening the heated blank material by rapidly cooling when the punch and the die are clamped. The trim part cutting means may include a trim presser step portion that is formed so as to protrude toward the punch side at an outer peripheral edge portion of the die side molding surface portion. The trim part cutting means has a trimming tool comprising a trimming blade formed at the tip corner at the inner peripheral edge of the trim presser step and a tip corner formed at the outer peripheral edge of the punch side molding surface. You can do it. The trim part cutting means may include a cut holder disposed along an outer peripheral edge of the punch side molding surface so as to face the trim presser step. The trim partial cutting means is provided on the punch side, and supports the cut holder so as to be able to approach and separate from the trim presser step portion in a state where the cut holder is elastically biased toward the trim presser step portion side. You may have a body. In the hot press processing method, during the press forming step of shaping a blank material while clamping the die against the punch by the press forming means, the trim presser step portion and the cut holder You may provide the process of clamping a trim part in the state to which the elastic force of the said spring structural body was provided. In the hot press working method, as the press forming operation of the die proceeds, the cut holder is subjected to the pressing force of the trim presser step portion and the cut holder is opposed to the elastic force of the spring constituting body while the punch side forming surface portion is pressed. By trimming the trimming blade relatively along the outer peripheral edge, the trimming blade shears the trim portion with the tip corner at the outer peripheral edge of the punch-side molding surface portion, thereby removing the trim portion. There may be provided a step of: The hot press working method includes a step in which the quench hardening means quenches the blank material by final clamping of the punch and the die after the trim part is cut by the trim part cutting means. You may be prepared.

  According to one aspect of the present invention, the cut holder that holds the trim portion in cooperation with the trim presser step portion is configured to be supported by the spring structure. Thus, as the blank material is formed, the trim presser step portion presses and moves the cut holder against the elastic force of the spring constituting body as the press forming operation of the die proceeds. As the pressing movement progresses, the spring structure contracts, and the trim holder gradually increases the holding force of the trim portion with the trim presser step portion while increasing the reaction force.

  Therefore, before trimming the trim part before final die clamping of the die against the punch, the degree of contraction of the spring structure is still small, and the reaction force exerted on the cut holder by the spring structure is small. The clamping force between the cut holder and the trim presser step is very slight. Therefore, drawing of the blank material into both the molding surfaces of the die and the punch can be performed with almost no resistance, and the flow of the blank material into the both molding surface portions is not hindered. As a result, the blank can be formed into a desired plate thickness or a desired shape with a punch and a die to obtain a desired press-formed product.

  Further, as described above, according to one aspect of the present invention, the clamping force between the cut holder and the trim presser step portion before the trim portion is excised is because the degree of expansion and contraction of the spring structure is very slight. By holding the trim portion between the cut holder and the trim presser step portion, a temperature decrease due to heat radiation of the previously heated blank is suppressed. Thereby, the material cannot flow into the forming die constituting the die and the punch due to the early curing of the blank material. Therefore, the occurrence of the worst phenomenon such as the material cracking of the blank can be prevented. Further, a press-molded product having a desired strength can be formed at the time of cooling and quenching the blank material which is performed by finally clamping the punch and die.

  According to one aspect of the present invention, when the die is clamped with respect to the punch, the degree of contraction of the spring structure that supports the cut holder is such that the trim presser step portion greatly contracts the spring structure in accordance with the die clamping operation. It grows by going. Accordingly, a large reaction force is generated on the trim presser step portion side in the cut holder, and the clamping force between the cut holder of the trim portion and the trim presser step portion is greatly increased. As a result, the blank material before quench hardening just before the final molding stage is firmly held between the cut holder and the trim presser step. Therefore, the occurrence of wrinkles or overlaps in the press-formed product due to excessive inflow of the blank material into the respective molding surface portions of the punch and die is suppressed. In addition, it is possible to apply a beautiful shearing process without burrs due to trimming of the trim part to the press-formed product.

  As a result, according to one aspect of the present invention, the trimming process performed by the trimming blade in cooperation with the tip corner portion of the punch-side molding surface portion is so-called that the trimming portion is bent while the trim portion is bent as in the prior art. Do not cut in the air. As a result, no burrs are formed in the finished press-formed product. Therefore, it is possible to eliminate the deburring work performed after the press product is completed, reduce the number of work steps, and reduce the cost of the product.

It is a schematic longitudinal cross-sectional view which drew an example of the state which set the blank material at the time of the die opening of the die | dye with respect to the punch of the hot press molding apparatus which concerns on one Example. The blank material in a state where the blank material is shaped by clamping the die to the punch from the mold open state in FIG. 1 and the trim portion is sandwiched between the punch-side cut holder and the die-side trim presser step portion. It is a schematic longitudinal cross-sectional view which drew an example of the process in the middle of press molding. The trim portion between the die-side trimming blade and the tip corner formed on the outer peripheral edge of the punch-side molding surface portion by pressing the die against the punch from the process state in the middle of the press molding of the blank material in FIG. It is the general | schematic longitudinal cross-section figure which drawn an example of the cutting start state of. In FIG. 3, the clamping of the die with respect to the punch is further advanced from the cutting start state due to the shearing of the trim portion, and the trim portion is sheared by the die-side trimming blade and the tip corner formed on the outer peripheral edge of the punch-side molding surface portion. It is a schematic longitudinal cross-sectional view which drew an example of the state which quenches a blank material by cutting the die | dye with respect to a punch after the cutting | disconnection by (1). It is the schematic longitudinal cross-sectional view which drawn the state which set the blank material at the time of the mold opening of a punch with respect to the die | dye of the conventional hot press molding apparatus. It is the schematic longitudinal cross-sectional view which drew the process in the middle of press molding of a blank material by the die clamping to the punch from the mold open state in FIG. It is the schematic longitudinal cross-sectional view which drew the mold clamping by die | dye with respect to a punch from the process state in the middle of press molding of the blank material in FIG. 6, and drawn the cutting start state of the trim part. The state in which the blank material is quenched by drawing the trim part further from the trim part in FIG. 7 and further clamping the die to the punch after the trim part is cut off is drawn. It is a schematic longitudinal cross-sectional view.

  According to a hot press working apparatus and a hot press working method using such an apparatus according to an embodiment of the present invention, the burrs formed after molding are eliminated by eliminating the occurrence of burrs in the press molded product due to trimming in the hot press molding process. Eliminating work, reducing man-hours and reducing product costs.

  Next, a hot press working apparatus according to an embodiment of the present invention will be described with reference to FIGS.

  A hot press working apparatus according to an embodiment of the present invention has a die composed of a die 1 as a movable die and a punch 2 as a fixed die, as in the prior art. Each of the die 1 and the punch 2 has molding surface portions 4 and 5 for molding the blank material 3 into a predetermined shape, for example, a press-molded product (not shown) having a cross-sectional hat shape.

  Therefore, of the molding surface portions 4 and 5, the die-side molding surface portion 4 has a concave fitting portion 4a formed at the center thereof. The punch-side molding surface portion 5 has a raised portion 5a formed at the center thereof so as to face the recessed fitting portion 4a. The concave fitting portion 4a and the raised portion 5a cooperate to form the blank material 3 into the shape of a press-formed product having a cross-sectional hat shape.

  Therefore, the die 1 having the die-side molding surface portion 4 in which the recessed fitting portion 4a is formed and the punch 2 having the punch-side molding surface portion 5 in which the raised portion 5a is formed shape a hat-shaped press-molded product. It constitutes press forming means.

  Further, a trim presser step portion 6 protruding toward the punch 2 side is formed on the outer peripheral edge portion 4 b of the die side molding surface portion 4 by overhanging. A trimming blade 7 is formed at the tip corner of the inner peripheral edge 6 a of the trim presser step 6. Such a trimming blade 7 constitutes a trimming tool together with a tip corner 5c formed on the outer peripheral edge 5b of the punch-side molding surface 5.

  Further, the cut holder 8 is disposed adjacent to the outer peripheral edge portion 5 b of the punch-side molding surface portion 5 so as to face the trim presser step portion 6. The cut holder 8 is pressed against the trim presser step 6 by the forming operation of the die 1 while being elastically biased toward the trim presser step 6 by a spring structure 9 provided on the punch 2 side. Thereby, it is comprised so that a movement along the outer-periphery edge part 5b of the punch side molding surface part 5 is possible. In addition, the spring structure 9 can be comprised using a coil spring, a pneumatic, or a hydraulic cylinder.

  As a result, the trim presser step portion 6 and the cut holder 8 move the die 1 toward the punch 2 by press forming means, and during the press forming process of shaping the blank material 3 while clamping, the blank material 3 The trim part 3a, which is a surplus part, is clamped in a state where the elastic force of the spring structure 9 is applied.

  Further, the trim part cutting means keeps the trim presser on the trimming blade 7 as the press forming operation of the die 1 proceeds while the trim part 3a is held between the trim presser step part 6 and the cut holder 8. While applying the pressing force of the stepped portion 6, the cut holder 8 is relatively moved along the outer peripheral edge portion 5 b of the punch-side molding surface portion 5 against the elastic force of the spring constituting body 9. Thereby, the trim part cutting means is configured to cut the trim part 3a by shearing between the trimming blade 7 and the tip corner part 5c of the outer peripheral edge part 5b of the punch-side molding surface part 5.

  The quench hardening means, after completion of trim part cutting by the trim part cutting means, finally clamps the die 1 against the punch 2 and rapidly cools them using a cooling device (not shown), It is comprised so that the blank material 3 may be quenched.

  A press-formed product is formed from the blank material 3 by the following steps using the hot press working apparatus according to the embodiment of the present invention described above. First, as shown in FIG. 1, between the die-side molding surface portion 4 of the die 1 and the punch-side molding surface portion 5 of the punch 2 in which the blank 3 heated to the quenching temperature is opened with respect to the punch 2. Install and set.

  Next, the die 1 moves toward the punch 2, and the blank material 3 is formed by fitting the punch side molding surface portion 5 into the recessed fitting portion 4 a of the die side molding surface portion 4.

  When the die 1 is further moved with respect to the punch 2 to perform the molding of the blank material 3 and the mold clamping is carried out, as shown in FIG. 2, the blanks are caused by the action of the recessed fitting portions 4a and the raised portions 5a. Projections are formed on the material 3. In addition, since the cut holder 8 protrudes flush with the punch-side molding surface portion 5 or toward the trim presser step portion 6 due to the elastic force of the spring structure 9, the cut holder 8 and the trim presser step portion 6 are provided. In response to the elastic force of the spring structure 9, the trim portion 3 a that is the surplus portion of the blank 3 is sandwiched.

  In this way, if the molding operation of the blank material 3 by the die 1 is advanced while maintaining the state in which the trim portion 3a is sandwiched between the cut holder 8 and the trim presser step portion 6, the press of the trim presser step portion 6 is advanced. In response to the pressure, the cut holder 8 moves relatively along the outer peripheral edge 5 b of the punch-side molding surface 5 while resisting the elastic force of the spring structure 9.

  In this way, the relative movement of the cut holder 8 along the outer peripheral edge 5b of the punch side molding surface portion 5 proceeds, and as shown in FIG. With this movement, the trimming blade 7 starts shearing the trim portion 3 a of the blank 3 with the tip corner portion 5 c of the punch-side molding surface portion 5.

  From this state, when the cut holder 8 moves along the outer peripheral edge portion 5b of the punch-side molding surface portion 5 against the elastic force of the spring constituting body 9, the cut holder 8 and the trimming trim presser step portion 6 move. As shown in FIG. 4, the trim portion 3 a that has been sandwiched between them is sheared. As a result, as shown in FIG. 4, the trim portion 3 a is cut off from the main body constituting the press-formed product of the blank material 3. .

  When the trimming of the trim portion 3a is completed in this manner, the die 1 and the punch 2 are finally clamped and rapidly cooled by a cooling device to perform a quenching process in which the blank material 3 is quenched. Thereby, a press-molded product is completed.

  As described above, in the embodiment of the present invention, the cut holder 8 that holds the trim portion 3a in cooperation with the trim presser step portion 6 is supported by the spring structure 9. As the molding of the blank 3 proceeds, the trim presser step 6 moves while pressing the cut holder 8 against the elastic force of the spring component 9 as the press molding operation of the die 1 proceeds. As the movement with such pressing proceeds, the spring structure 9 contracts and the cut holder 8 generates a reaction force to gradually increase the clamping force of the trim portion 3a between the trim presser step portion 6.

  Therefore, before the trim processing of the trim portion 3a before the final mold clamping of the die 1 with respect to the punch 2, the contraction degree of the spring component 9 is still small, and the reaction force exerted on the cut holder 8 by the spring component 9 is small. small. Therefore, the clamping force between the cut holder 8 and the trim presser step portion 6 in the trim portion 3a is very small. The blank material 3 can be drawn into the molding surface portions 4 and 5 of the die 1 and the punch 2 with almost no resistance, and the flow of the blank material 3 into the molding surface portions 4 and 5 is prevented. Absent. By forming the blank 3 with such a punch 2 and die 1, a press-formed product having a desired plate thickness or a desired shape can be obtained.

  Further, as described above, according to the embodiment of the present invention, since the degree of expansion and contraction of the spring structure 9 is very slight before trimming of the trim portion 3a, the clamping force between the cut holder 8 and the trim presser step portion 6 is small. small. Therefore, it is possible to suppress the preheated blank 3 from dissipating heat by holding the trim portion 3a by the cut holder 8 and the trim presser step portion 6 and causing a decrease in temperature. Due to the early curing of the blank material 3, it becomes possible to prevent the material from flowing into the molding die constituted by the die 1 and the punch 2, thereby preventing the worst phenomenon such as the material cracking of the blank material 3. Further, in the subsequent cooling and quenching of the blank 3 performed by finally clamping the punch 2 and the die 1, a press-formed product having a desired strength can be formed.

  According to the embodiment of the present invention, when the die 1 is finally clamped with respect to the punch 2, the degree of contraction of the spring structure 9 that supports the cut holder 8 depends on the clamping operation of the die 1 with respect to the trim presser step 6. As a result, the spring structure 9 becomes larger by being contracted greatly. Accordingly, a large reaction force is generated in the cut holder 8 against the trim presser step portion 6 side, and the clamping force between the cut holder 8 and the trim presser step portion 6 of the trim portion 3a is greatly increased. As a result, the blank material 3 before quench hardening immediately before the final stage of molding is firmly held between the cut holder 8 and the trim presser step portion 6. Therefore, generation | occurrence | production of the wrinkle or overlap to a press molded product by the excessive inflow of the blank material 3 in each molding surface part 4 and 5 of the punch 2 and die | dye 1 is suppressed. In addition, a clean shearing process without burrs can be applied to the press-formed product by cutting the trim portion 3a.

  As a result, according to one aspect of the present invention, the trimming process performed by the trimming blade 7 in cooperation with the tip corner portion 5c of the punch-side molding surface portion 5 is performed while the trim portion is bent as in the prior art. It is not a so-called aerial cut. Thereby, a burr | flash is not produced in the completed press molded product. Therefore, it is possible to eliminate the deburring work performed after the press product is completed, reduce the number of work steps, and reduce the cost of the product.

  According to one aspect of the present invention described above, even when the trimming process is performed on a blank material in a high temperature state, it is possible to eliminate the occurrence of burrs in the press-molded product due to the trimming process in the hot press molding process. . As a result, the deburring work performed after molding is eliminated, the number of work steps is reduced, and the cost of the product is reduced. Therefore, for example, a steel blank is heated to its quenching temperature, such as a car body part produced by press molding such as an automobile door impact beam or center pillar, and the heated steel is used with a low-temperature mold. It is suitable for a hot press working apparatus that is shaped by forming and quenching and a hot press working method using such a hot press working apparatus.

DESCRIPTION OF SYMBOLS 1 Die 2 Punch 3 Blank material 3a Trim part 4 Die side molding surface part 4a Recessed fitting part 4b Outer peripheral edge part 5 Punch side molding surface part 5a Raised part 5b Outer peripheral edge part 5c Tip corner part 6 Trim presser step part 6a Inner peripheral edge part 7 Trimming Blade 8 Cut holder 9 Spring component

Claims (2)

A press molding means for shaping a preheated blank material into a shape of a press molded product by clamping a die having a molding surface portion with respect to a punch having a molding surface portion;
Trim part cutting means for trimming a trim part as a surplus part which is a part outside the configuration of the press-formed product in the blank material;
Quenching and curing means for quenching and curing the heated blank material by rapidly cooling when the punch and the die are clamped;
The trim part cutting means is
A trim presser step portion formed so as to protrude toward the punch side on the outer peripheral edge portion of the molding surface portion on the die side,
A trimming tool comprising a trimming blade formed at a tip corner portion at an inner peripheral edge portion of the trim presser step portion and a tip corner portion formed at an outer peripheral edge portion of the molding surface portion on the punch side;
A cut holder disposed adjacent to an outer peripheral edge portion of the molding surface portion on the punch side so as to face the trim presser step portion;
A spring structure that is provided on the punch side and supports the cut holder so as to be able to approach and separate from the trim presser step portion in a state where the cut holder is elastically biased toward the trim presser step portion side;
In the press molding step of shaping the blank material while clamping the die against the punch by the press molding means, the trim portion is placed between the trim presser step portion and the cut holder in the spring structure. Sandwiched with the elastic force of
As the die press forming operation proceeds, the outer peripheral edge portion of the forming surface portion on the punch side receives the pressing force of the trim presser step portion and opposes the cut holder to the elastic force of the spring constituting body. By moving the trimming blade relatively along the cutting edge, the trimming blade is cut off by shearing the trim portion between the outer peripheral edge portion of the molding surface portion on the punch side,
The quench hardening means performs quenching of the blank material by final clamping of the punch and the die after the trim part is cut by the trim part cutting means.
Hot press processing equipment. A hot press processing method using a hot press processing apparatus,
The hot press machine is
A press molding means for shaping a preheated blank material into a shape of a press molded product by clamping a die having a molding surface portion with respect to a punch having a molding surface portion;
Trim part cutting means for trimming a trim part that is a surplus part that is an external part of the press-formed product in the blank material;
Quenching and curing means for quenching and curing the heated blank material by rapid cooling when clamping the punch and the die;
Have
The trim part cutting means is
Trim presser step portion formed to project to the punch side on the outer peripheral edge portion of the molding surface portion on the die side;
A trimming tool comprising a trimming blade formed at a tip corner portion at an inner peripheral edge portion of the trim presser step portion and a tip corner portion formed at an outer peripheral edge portion of the molding surface portion on the punch side;
A cut holder disposed adjacent to an outer peripheral edge portion of the molding surface portion on the punch side so as to face the trim presser step portion;
A spring structure that is provided on the punch side and supports the cut holder so as to be able to approach and separate from the trim presser step portion in a state where the cut holder is elastically biased toward the trim presser step portion side;
The hot press processing method is:
During the press molding step of molding a blank material while clamping the die against the punch by the press molding means, the trim portion is placed between the trim presser step portion and the cut holder of the spring structure. Clamping in a state where an elastic force is applied;
As the press molding operation of the die proceeds, the outer periphery of the molding surface portion on the punch side receives the pressing force of the trim presser step portion and opposes the cut holder against the elastic force of the spring structure. Cutting the trim part by shearing the trim part between the trimming blade and the tip corner of the outer peripheral edge of the molding surface part on the punch side by moving the trimming blade relatively along ,
And a step of quenching the blank material by final clamping of the punch and the die after the trimming section has been cut off by the trim part cutting section.

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