KR102224397B1 - Method for Preventing Post Deformation Using Cooling Jig for Carrier Assembly Front End Module Manufacturing - Google Patents

Abstract

The present invention relates to a cooling jig for manufacturing a carrier assembly front end module (FEM), and more particularly, a front end module (FEM) for fixing a plurality of automobile parts including bumpers, lamps, bonnet locks, radiators, and hoods. It relates to a method for preventing post-deformation using a cooling jig for manufacturing a front end module (FEM), which increases the yield of good products by suppressing the occurrence of deformation during cooling after injection molding when manufacturing the :Front End Module).

Description

Method for Preventing Post Deformation Using Cooling Jig for Carrier Assembly Front End Module Manufacturing}

The present invention relates to a method for preventing post-deformation using a cooling jig for manufacturing a front end module (FEM) for a carrier assembly, and in more detail, fixing a plurality of automobile parts including bumpers, lamps, bonnet locks, radiators, and hoods. The present invention relates to a method for preventing post-deformation using a cooling jig for manufacturing a front-end module for a carrier assembly that increases the yield of good products by suppressing the occurrence of deformation during cooling after injection molding when manufacturing a front end module (FEM).

The front end module (FEM) carrier that composes the front end of a vehicle such as a car is a front end module (FEM:) by fixing a number of automotive parts including bumpers, headlamps, bonnet locks, condensers, radiators and hoods. Front End Module) It is the skeleton that makes up the carrier assembly.

Such a front end module (FEM) carrier reduces assembly time when the components are modularized through a front end module (FEM) carrier compared to the conventional assembly method in which individual parts are directly assembled to the vehicle body. It can be shortened, the dimensional stability of the module unit can be improved, and the integrated design is possible, so there is a great advantage in productivity and product reliability.

For example, as shown in the example of FIG. 1, a conventional front end module (FEM) carrier 10 includes a body 1, a headlamp mounting part 2 for mounting headlamps on both sides of the upper side, and cooling in the center. It includes a cooling module mounting portion 3 for mounting a module (radiator), and a side panel 4 on which a bumper beam is mounted.

Meanwhile, most passenger vehicles are currently equipped with a front end module (FEM) carrier, and are disclosed in various forms.

And, because of the weight of steel, plastic is used to reduce weight, but the durability of the plastic alone is considerably lower, so now the insert-injection type that inserts and injects steel has taken place.

However, it is very difficult to meet the tolerance because it is a form of injection by inserting steel to maintain strength.

When cooling after injection molding, the coefficient of thermal expansion between the synthetic resin and the steel is different, causing a difference in the shrinkage rate and eventually causing a post-deformation beyond the tolerance.

In particular, this rear deformation occurs largely in a portion where the bumper is assembled with a plurality of bolt holes, and the upper end is inclined to the front, and the fender side is also rolled inward.

Usually, when the injection product is taken out, the temperature is about 70-80℃, and it is naturally cooled, and excessive deformation that occurs during this process becomes a defective product.

Korean Patent Registration No. 10-0868438 (2008.11.05.), Front carrier of vehicle and manufacturing method thereof Republic of Korea Patent Registration No. 10-0577814 (2006.05.01.), horizontal latch coupling structure of the upper panel of the front end module of a vehicle Republic of Korea Patent Registration No. 10-1282651 (2013.07.01.), FEM carrier mounting structure

The present invention was created to solve the problems in the prior art as described above, and a front end module (FEM: Front End Module) for fixing a plurality of automobile parts including bumpers, lamps, bonnet locks, radiators, and hoods. The main purpose is to provide a method for preventing post-deformation using a cooling jig for manufacturing a front end module (FEM) for a carrier assembly that increases the yield of good products by suppressing the occurrence of deformation during cooling after injection molding when manufacturing).

The present invention is a means to achieve the above object, a front end module (FEM: Front End Module) injection-molded in a state in which steel is inserted is taken out from a molding machine and then mounted on a cooling jig ( FEM: Front End Module) cooling jig mounting step (S100); When the mounting of the front end module (FEM) is completed, detecting the surface temperature of the front end module (FEM) using the temperature detection sensor 400 (S110); Checking and setting an inverse gradient value corresponding to the surface temperature of the detected front end module (FEM) (S120); When the setting of the inverse gradient value is completed, the controller 500 drives a plurality of grippers installed in the cooling jig by the corresponding inverse gradient value to forcibly reverse deformation (S130); When the forced reverse deformation is completed, the controller 500 ejects cooling air to forcibly cool the front end module (FEM) (S140); Ending cooling when the surface temperature of the front end module (FEM) reaches 20-30° C. due to forced cooling, removing the front end module (FEM), and then naturally cooling (S150); In the post-deformation prevention method using a cooling jig for manufacturing a carrier assembly front end module comprising a;
The controller 500 is a microprocessor, a memory unit 800 that receives the surface temperature of a front end module (FEM) detected by the temperature detection sensor 400 connected to it, and temporarily stores the received temperature information. ), and the deformation direction and deformed angle, which are post-deformation information for each surface temperature of the front end module (FEM: Front End Module) after injection, are converted into a database, and then the Deformation Information Database (DB: Database) 600 is further connected. When the temperature detection sensor 400 detects the surface temperature of the front end module (FEM), the post-deformation information corresponding to the surface temperature is found in the post-deformation information database (DB: Database) 600 and It provides a method for preventing post-deformation using a cooling jig for manufacturing a front end module of a carrier assembly, characterized in that the inverse gradient calculation unit 700 for setting an angle to be forcibly deformed in the opposite direction to is further connected.

In this case, the temperature detection sensor 400 is characterized by being an infrared temperature detection sensor capable of measuring the surface temperature of a front end module (FEM) in a non-contact manner.

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According to the present invention, when manufacturing a front end module (FEM) that fixes a number of automobile parts including bumpers, lamps, bonnet locks, radiators, and hoods, it is possible to suppress deformation during cooling after injection molding to yield good products. It is possible to obtain the effect of increasing.

1 is an exemplary perspective view showing a conventional carrier assembly front end module (FEM).
FIG. 2 is a schematic illustration of a cooling jig for preventing rear deformation of a front end module (FEM) according to the present invention.
3 is an actual working photograph showing an example in which a front end module (FEM) is mounted on a cooling jig for preventing rear deformation of a front end module (FEM) according to the present invention.
4 is an exemplary view showing a partial excerpt of the operation structure of the holding cylinder installed in the cooling jig according to the present invention.
5 is a flowchart showing a method for preventing post-deformation using a cooling jig for manufacturing a front end module (FEM) according to the present invention.
6 is a block diagram of a controller for implementing a method for preventing post-deformation using a cooling jig for manufacturing a front end module (FEM) according to the present invention.

Hereinafter, a preferred embodiment according to the present invention will be described in more detail with reference to the accompanying drawings.

Prior to the description of the present invention, the following specific structure or functional descriptions are exemplified only for the purpose of describing embodiments according to the concept of the present invention, and embodiments according to the concept of the present invention may be implemented in various forms, It should not be construed as being limited to the embodiments described herein.

In addition, since the embodiments according to the concept of the present invention can apply various changes and have various forms, specific embodiments are illustrated in the drawings and will be described in detail in the present specification. However, this is not intended to limit the embodiments according to the concept of the present invention to a specific form of disclosure, and it should be understood that all modifications, equivalents, and substitutes included in the spirit and scope of the present invention are included.

The method for preventing post-deformation using a cooling jig for manufacturing a carrier assembly front end module (FEM) according to the present invention is forced by spraying cooling air until the surface temperature of the ejected product, that is, the injection product reaches 20-30°C. It is configured to suppress post-deformation by cooling with air.

In particular, the cooling jig is forcibly deformed in a reverse gradient (reverse deformation), which is deformed before cooling so that it will deform in the future, and then cooled to a normal state due to the post-deformation generated during cooling. It is to keep it.

In this case, when cooling is performed by a water cooling method, even faster cooling can be achieved.

However, in the case of water cooling, it is very complicated to configure the facility, and above all, since water cooling does not cool well on the rib side, it causes another unexpected shrinkage deformation due to the deviation between the less cooled part and the well-cooled part. Therefore, forced cooling of the water cooling method is not preferable.

To this end, a cooling jig for implementing a post-deformation prevention method using a cooling jig for manufacturing a front end module (FEM) of a carrier assembly includes a base block 100 as illustrated in FIGS. 2 to 3.

The base block 100 is provided with a pair spaced apart from each other, and a fixing plate 200 for forming a working space 110 between the base blocks 100 by connecting and fixing the rear surfaces of the base blocks 100 to each other is further provided. It is equipped.

At this time, the fixing plate 200 is a plate-shaped member.

In addition, the fixing plate 200 is provided with a pair of cooling air jet ducts 300 fixed perpendicularly to the plate surface so as to be symmetrical with respect to the center of the left and right lengths.

In addition, a support pad 310 on which a front end module (FEM) is mounted and supported is integrally fixed to the front end of the cooling air blowing duct 300.

In addition, a plurality of cooling air ejection holes 320 for ejecting cooling air toward a front end module (FEM) seated and fixed on the support pad 310 are formed on the upper surface of the cooling air ejection duct 300 do.

In addition, a central support 330 protrudes vertically at the center of the length of the upper fixing plate 200 at a height distance from the cooling air ejection duct 300, and a central support pad at the end of the central support 330 (332) is fixed, and a pair of side support 340 is vertically protruded with an interval on both sides with the center support 330 interposed therebetween, and side support pads at each end of the side support 340 ( 342) is fixed to support when the front end module (FEM) is mounted.

In addition, the fixing rod 350 is vertically protruded on both sides of the space between the cooling air blowing duct 300 and the side support 340, and a front end module (FEM) at the end of the fixing table 350 The protrusion plate 354 in which the fitting protrusion 352 is integrally protruded into the bolt hole is fixed.

Accordingly, when the ejected front end module (FEM) is fitted with bolt holes on both sides of the fitting protrusion 352, it can be seated in the shape as shown in FIG. 3.

In addition, a pair of upper gripping holes 360 are installed at intervals on each upper side of the fixing table 350, and a lower gripping hole 370 is installed below the fixing table 350, and a central gripping hole 380 is installed in the center. do.

In addition, the upper gripping hole 360, the lower gripping hole 370 and the central gripping hole 380 are provided with a gripping plate (PTP) that can be folded and unfolded by power, and the gripping plate (PTP) has the fitting A protrusion pressing member (PUT) that engages with the protrusion 352 and fixes the front end module (FEM) so as not to be separated is installed.

Here, since the upper gripper 360, the lower gripper 370, and the central gripper 380 have the same structure, they will be combined and described together with reference to FIG. 4.

According to FIG. 4, the upper gripping hole 360, the lower gripping hole 370, and the central gripping hole 380 have a'U'-shaped gripping plate 10 fixed perpendicularly to the fixing plate 200, and the An operating cylinder 20 fixed to the inside of the gripping plate 10, a cylinder rod 30 installed in the operating cylinder 20 to move in and out, and a rotation shaft 42 on both ends of the gripping plate 10 A pair of pivoting pieces (40) having a cam groove (44) which is rotatably fixed to the axis of the opposite face and is formed in an arc shape with a predetermined depth, and is fixed to the cylinder rod (30), and is fixed to the gripping plate (10). ) Includes a cam 50 having a camshaft 52 that is protruding and protruding from the state inserted in the cam groove 44 and engaged with the cam groove 44 on both sides thereof.

At this time, the lower end of the gripping plate PTP is fixed to the upper end of the rotating piece 40.

Accordingly, when the operating cylinder 20 is operated and the cylinder rod 30 is pulled, the camshaft 52 moves to the top dead center of the cam groove 44, and the gripping piece PTP can be folded by 90° or more.

On the contrary, when the operating cylinder 20 operates and the cylinder rod 30 is pushed out, the camshaft 52 moves to the bottom dead center of the cam groove 44 and spreads the gripping piece (PTP) in the horizontal direction. FEM: Front End Module) can be separated.

The cooling jig according to the present invention configured as described above ejects cooling air in a state in which the front end module (FEM) injected by rotating the gripping plate (PTP) is previously deformed in the opposite direction by the amount deformed during natural cooling. Cooling air is blown through the ball 320 to forcibly cool the surface temperature of the front end module (FEM) to about 20-30°C.

Then, if you separate the front end module (FEM) from the cooling jig and cool it to room temperature, post-deformation occurs in the process and returns to the original state as it was reverse deformed. do.

The method of preventing the rear deformation of the front end module (FEM) using such a cooling jig is as follows.

5 and 6, a front end module (FEM: Front End Module) that is mounted on a cooling jig after taking out an injection-molded front end module (FEM) from a molding machine in a state in which steel is inserted. Module) cooling jig mounting step (S100) is performed.

Then, a step (S110) of detecting the surface temperature of a front end module (FEM) using the temperature detection sensor 400 is performed.

In this case, the temperature detection sensor is preferably an infrared temperature detection sensor capable of measuring the surface temperature of a front end module (FEM) in a non-contact manner.

Subsequently, a step S120 of checking and setting an inverse gradient corresponding to the surface temperature of the detected front end module (FEM) is performed.

The step (S120) is performed by the controller 500 as illustrated in FIG. 6.

The controller 500 is a microprocessor, and receives the surface temperature of a front end module (FEM) detected by the temperature detection sensor 400 being connected, and a memory unit 800 to temporarily store the corresponding temperature information. ).

In addition, a post-deformation information database (DB: Database) 600 is further connected to the controller 500, and a front end module (FEM) after injection is further connected to the post-deformation information database (DB: Database) 600. ), information on the direction of post-deformation by surface temperature and the degree of post-deformation (inclination angle) is stored in a database.

In addition, when the controller 500 is further connected with an inverse gradient calculation unit 700 so that when the temperature detection sensor 400 detects the surface temperature of the front end module (FEM), it corresponds to the corresponding surface temperature. Deformation information is found in a post-deformation information database (DB: Database) 600, and an inverse gradient value to be forcibly assigned in the opposite direction is calculated and set.

On the other hand, when the setting of the inverse gradient value is completed, the controller 500 drives a plurality of grippers installed in the cooling jig by the corresponding inverse gradient value to forcibly reverse deformation (S130).

In this case, the inverse gradient value is equal to the angle at which the deformation occurs in a direction opposite to the post deformation generated during natural cooling. This is determined for each surface temperature of the front-end module checked in the post-deformation information database 600. In other words, inverse gradient refers to the transformation in the opposite direction in advance at the same angle as the post transformation angle during natural cooling.

Then, it is possible to maintain a normal state that is not deformed while being deformed after natural cooling.

In this way, when the forced reverse deformation is completed, the controller 500 performs a step (S140) of forcibly cooling the front end module (FEM) by ejecting cooling air.

In addition, when the surface temperature of the front end module (FEM) reaches 20-30°C due to forced cooling, the cooling is terminated, the front end module (FEM) is removed, and then natural cooling is performed (S150). ) Is performed.

Here, the reason that the cooling should be terminated when the surface temperature of the front end module (FEM) reaches 20-30℃ is that the post-deformation inevitably occurs when it is completely cooled to room temperature. This is to cool as much as possible before cooling down.

In this way, the present invention implements a forced inverse gradient in the opposite direction based on the post-deformation data, so that post-deformation that is indispensable during natural cooling to room temperature naturally becomes a part of the process of making a normal product, thereby preventing product defects. I did it.

100: base block
200: fixed plate
300: cooling air blowing duct

Claims (3)

Front End Module (FEM) cooling jig mounting step (S100) in which the front end module (FEM), which is injection-molded with steel inserted, is taken out from the molding machine and mounted on a cooling jig (S100) ; When the mounting of the front end module (FEM) is completed, detecting the surface temperature of the front end module (FEM) using the temperature detection sensor 400 (S110); Checking and setting an inverse gradient value corresponding to the surface temperature of the detected front end module (FEM) (S120); When the setting of the inverse gradient value is completed, the controller 500 drives a plurality of grippers installed in the cooling jig by the corresponding inverse gradient value to forcibly reverse deformation (S130); When the forced reverse deformation is completed, the controller 500 ejects cooling air to forcibly cool the front end module (FEM) (S140); Ending cooling when the surface temperature of the front end module (FEM) reaches 20-30° C. due to forced cooling, removing the front end module (FEM), and then naturally cooling (S150); In the post-deformation prevention method using a cooling jig for manufacturing a carrier assembly front end module comprising a;
The controller 500 is a microprocessor, a memory unit 800 that receives the surface temperature of a front end module (FEM) detected by the temperature detection sensor 400 connected to it, and temporarily stores the received temperature information. ), and the deformation direction and deformed angle, which are post-deformation information for each surface temperature of the front end module (FEM: Front End Module) after injection, are databaseized, and the Deformation Information Database (DB: Database) 600 is further connected. When the temperature detection sensor 400 detects the surface temperature of the front end module (FEM), the post-deformation information corresponding to the surface temperature is found in the post-deformation information database (DB: Database) 600 and A method for preventing post-deformation using a cooling jig for manufacturing a front end module of a carrier assembly, characterized in that the inverse gradient calculation unit 700 for setting an angle to be forcibly deformed in the opposite direction to is further connected.
The method according to claim 1,
The temperature detection sensor 400 is an infrared temperature detection sensor capable of measuring the surface temperature of a front end module (FEM) in a non-contact manner. Way.
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