KR101200567B1 - device for bonding between different material parts - Google Patents

Abstract

The present invention, when the assembly process between the cylindrical part made of steel and the aluminum part of the heterogeneous material bonded to the outer circumferential surface, the part weight can be easily connected by applying appropriate heat while fixing the two parts to be attached at the correct position It was intended to be planned.
To this end, the present invention, the cylindrical body (100); Pressing means coupled to one end of the cylindrical body 100 so as to pressurize and discharge the adhesive injected into the cylindrical body 100; Heating means is installed for heating and curing of the adhesive through the other end of the cylindrical body (100) is configured to include, the cylindrical body (100) on the surface of the cylindrical body (100) when pressing the piston (120a) Provided is an adhesive coating and curing apparatus for bonding between dissimilar material components, characterized in that the coating nozzle (100a) for discharging the adhesive is provided.

Description

Device for bonding between different material parts}

The present invention relates to an apparatus for joining dissimilar material parts, and more particularly, in joining a cylindrical material, which is a dissimilar material, and a bracket adhered thereto with a heat-curable adhesive, by fixing the two parts in an accurate position, It relates to a technique that allows heat to be maximized to maximize the bond strength.

In general, as vehicle weight reduction trends for improving fuel efficiency of vehicles are accelerated, cases of using low specific gravity alloys such as aluminum instead of conventional cold rolled steel sheets have increased in car bodies and vehicle parts.

In other words, the use of non-ferrous metal materials such as aluminum and the like is increasing to cope with the lightening of vehicle structures due to the increase in oil prices and tightening environmental regulations. In the material design, the design conversion of the vehicle structure is being made from the multi-material design by the dissimilar material combination such as steel-aluminum.

On the other hand, aluminum is superior to steel alloys, but new bonding processes are being developed because resistance spot welding (RSW), which is a common bonding process of existing steel alloys, is not applicable.

This is because, in the case of multi-material design for the weight reduction of a vehicle structure, existing mechanical joining is impossible due to the use of dissimilar materials such as steel-aluminum, or joining homogeneous materials between steel and steel. This is because the joint strength of the joints is lower than that of the joints, and a new bonding method is required.

Among them, a bonding technology using a structural adhesive is attracting attention. In the case of a heat curing adhesive, a curing process is required for bonding, and thus, development of an appropriate curing technology that can maximize the bonding strength of each product is essential.

In particular, the bonding between components is adhesive for tubular products such as cylinders of power steering which are vehicle parts (see FIG. 1 (a)) and products such as brackets (see FIG. 1 (b)) which are coupled to the cylinder outer peripheral surface. This is a time point when a technology that is easily achieved by the present invention and has sufficient bonding strength is required.

For reference, when the outer surface of the cylindrical part is knurled to form a fine groove, when the cylindrical part is inserted into the mold and die-casted with aluminum, aluminum enters between the fine grooves in the die casting process, and the heterogeneous parts are combined. Bonding between dissimilar materials through this casting method is disadvantageous for mass production. That is, since the large mold equipment must be put in for mass production during casting, there is a limit in terms of space, the life is low even in the life of the mold, and it is difficult to apply because there is a problem in the cost of the mold.

As a result, in the joining between cylindrical parts such as power steering cylinders, which are vehicle parts, and products such as brackets joined to the outer circumferential surface of the cylinder, the bonding method using a heat curing adhesive is most economical, but at present, such a function There is no device to provide.

The present invention is to solve the above-mentioned problems, when the assembly process between the aluminum material of the heterogeneous material bonded to the cylindrical part made of steel and the outer peripheral surface, while applying the appropriate heat while fixing the two parts to be attached to the correct position It is an object of the present invention to provide an adhesive coating and curing apparatus for joining dissimilar materials between parts to maximize the joining strength and to facilitate joining.

In particular, the present invention by applying a heat-curable adhesive accurately to the inner peripheral surface of the hollow portion of the aluminum bracket bonded to the outer surface of the cylindrical component such as a power steering cylinder, which is a vehicle component, and then by curing the curing operation of the adhesive with a heat source used when applying the adhesive It is an object of the present invention to provide an adhesive coating and curing apparatus for joining dissimilar material parts that can improve workability.

The present invention to achieve the above object, the cylindrical body; Pressing means coupled to one end of the cylindrical body so as to pressurize and discharge the adhesive injected into the cylindrical body; And heating means installed for heating and curing the adhesive through the other end of the cylindrical body. An adhesive application and curing apparatus for bonding between dissimilar material parts is provided.

The pressing means is characterized in that the piston is installed through the stopper provided on one end of the cylindrical body.

And, the heating means, characterized in that it comprises a heat transfer cartridge, and a temperature sensor mounted for detecting the temperature of the cylindrical body.

The heating means may be a heat transfer cartridge with a built-in temperature sensor.

On the other hand, the present invention in the bonding between the cylindrical component and the bracket to be adhered to the heterogeneous material, it is characterized in that the guide jig for guiding the installation position of the adhesive coating and curing apparatus as well as fixing the bracket to be adhered do.

The guide jig is a fixed plate for fixing a base, a plurality of pairs of guide plates that are paired with two plates fixed to the base and formed with a semicircular guide groove, and a bracket fixed to the base and adhered to a cylindrical part. It is configured to include.

At this time, the bracket fixing plate is formed with a mounting groove to match the shape of the bracket, while the pin groove is formed is inserted into the fixing pin for fixing the bracket.

The present invention can reduce the hydraulic power steering system (Power steering system) of the vehicle.

In particular, when replacing the hydraulic cylinder fixing bracket with aluminum alloy while securing the desired bonding force, it is possible to reduce the weight by about 20%.

In addition, the present invention is able to hold the precise bonding position between the cylindrical component and the bracket, that is, the adherend, it is possible to secure the desired bonding force.

On the other hand, according to the present invention, it is not necessary to put the entire part including the adhesive portion in the heating furnace, so that the thermal energy required for curing the adhesive can be reduced, and temperature control to an appropriate temperature is possible.

Figure 1a is a reference picture showing the coupling state of the vehicle power steering cylinder and bracket
FIG. 1B is a cross-sectional reference diagram for describing the junction part structure of FIG. 1A.
Figure 2 is a cross-sectional view of the configuration of the adhesive coating and curing apparatus according to the present invention,
(A) is a cross-sectional view showing the bonding state
(B) is a cross-sectional view showing the disassembly state
3 is a front view showing the appearance of FIG.
4 is a physical reference picture of the adhesive coating and curing apparatus according to the present invention
Figure 5 is a reference picture showing a jig for adhesive application and curing apparatus according to the present invention
6a to 6g sequentially show the progress of the bonding process between dissimilar materials using the adhesive coating and curing apparatus of the present invention,
Figure 6a is a product reference picture illustrating a structural adhesive applied to the present invention
Figure 6b is a reference picture showing the hydraulic cylinder and the aluminum bracket, which is a dissimilar material component according to the present invention.
Figure 6c (a) is a plan view showing a state in which the bracket is seated in the bracket groove of the jig of Figure 5, (b) is a cross-sectional view along the line I-I of (a).
6D is a plan view showing the state after fixing the (A) aluminum bracket with a fixing pin, (B) is a cross-sectional view along the line II-II of (A).
FIG. 6E (a) is a state diagram after the adhesive coating device is inserted into the bracket and (b) is a cross-sectional view taken along the line III-III of (a).
(F) of FIG. 6F is a state diagram after completion | finish of adhesive application,
(B) is a cross-sectional view taken along line IV-IV of (A).
(C) is a cross-sectional view along line V-V of (B).
Figure 6g (a) is a state diagram after removing the adhesive coating device,
(B) is a cross-sectional view taken along line VI-VI of (a).
Figure 6h (a) is a plan view showing a state in which the hydraulic cylinder is inserted into the bracket,
(B) is the cross-sectional view along the Ⅶ-Ⅶ line of (A).
Figure 6i (a) is a state diagram after the assembly of the adhesive curing device,
(B) is the cross-sectional view along the Ⅷ-Ⅷ line of (A).
(C) is the cross-sectional view along the Ⅸ-Ⅸ line of (B).
Figure 6j is a reference picture showing the prototype of the hydraulic cylinder and the bracket bonded after the completion of the curing process
7a to 7d show another example of the structure of the pressing means for applying the adhesive,
Figure 7a is a configuration diagram of the pressing means of the steering system
7b is a configuration and operation of the gear means of the pressing means
Figure 7c is a configuration and action diagram of the needle-type pressing means
Figure 7d is a configuration and action diagram according to another embodiment of the piston-type pressing means

Hereinafter, with reference to the accompanying drawings, Figures 1 to 7d for specific details and preferred embodiments of the present invention will be described in detail.

Example 1

Figure 1a is a reference picture showing the coupling state of the hydraulic cylinder and the bracket for the power steering system for automobiles, Figure 1b is a cross-sectional reference view for explaining the junction shape structure of Figure 1a.

And, Figure 2 is a cross-sectional view of the adhesive coating and curing apparatus according to the present invention, Figure 3 is a front view showing the appearance of Figure 2, Figure 4 is a real reference picture of the adhesive coating and curing apparatus according to the invention, Figure 5 is a reference picture showing a jig for an adhesive coating and curing apparatus according to the present invention.

Referring to these drawings, the adhesive applying and curing device 1 for bonding between dissimilar material parts according to the present invention, the cylindrical body 100, and the adhesive (A) injected into the cylindrical body 100 pressurized It is configured to include a pressing means coupled to one end of the cylindrical body 100 to be discharged by, and a heating means installed for heating and curing the adhesive (A) through the other end of the cylindrical body 100, On the surface of the cylindrical body 100 is formed a coating nozzle (100a) for discharging the adhesive (A) inside the cylindrical body 100 when the piston (120a) is pressed.

At this time, the plurality of coating nozzles (100a) is formed on the surface of the cylindrical body 100, it is formed spaced apart at regular intervals along the circumferential direction.

In addition, the pressing means is a plunger 120b having a screw thread formed on an outer circumferential surface of the cylindrical body 100 installed through the stopper 140 provided at one end thereof, and the cylindrical body 100 coupled to the tip of the plunger 120b. It is configured to include a piston (120a) for pressing to discharge the adhesive (A) injected therein.

Of course, the plunger 120b may be driven by a motor.

The heating means includes a heat transfer cartridge 2 installed at the other side of the cylindrical body 100 and a temperature sensor (not shown) mounted to detect the temperature of the cylindrical body 100. The means is detachably installed from the cylindrical body 100.

On the other hand, the heating means may include a cartridge housing 200 which is coupled to the cylindrical body 100 while receiving the heat transfer cartridge (2). The cartridge housing 200 is coupled to the cylindrical body 100 to prevent leakage of the adhesive (A) during the piston action.

The heating means may be a heat transfer cartridge with a built-in temperature sensor.

On the other hand, the present invention in the bonding of the cylinder (S) which is a different material and the bracket (B) adhered thereto, while fixing the bracket (B) to guide the installation position of the adhesive coating and curing device (1) The guide jig 3 is further provided.

The guide jig 3 may include a base pair, a plurality of pairs of guide plates 320 fixed to the base 300, and two plates having semi-circular guide grooves 320a formed therein, and the base ( It is configured to include a bracket fixing plate 340 for fixing the bracket (B) to be fixed to 300 and adhered to the cylinder (S).

At this time, the bracket fixing plate 340 has a mounting groove (340a) is formed to prevent the flow when mounting the bracket (B), while the pin groove for inserting the fixing pin 400 for fixing the bracket (B) ( 360b) is formed.

The guide plate 320 and the bracket fixing plate 340 are detachably coupled to the base 300. This is to replace the guide plate 320 and the bracket fixing plate 340 with another in accordance with the size or shape of the cylinder (S) and the bracket (B).

And, one side of the cylindrical body 100 of the coating and curing apparatus 1 of the present invention may be installed with a handle 160 to improve the convenience of operation.

On the other hand, in the present invention, the adhesive (A) refers to the structural adhesive, it should be lower than the surface free energy of the bonding member. In addition, it is possible to improve the wettability of the bonding agent by increasing the surface free energy of the bonding member through the surface treatment process.

In particular, in order to bond different materials of steel and aluminum, an adhesive capable of bonding both steel and aluminum should be selected. In addition, if a coating process is included in the applied product process, the thermosetting adhesive should be selected in consideration of this. There is also a need for a one-part adhesive that does not require a separate curing agent and resin mixing process. Therefore, in the present embodiment, the thermosetting one-component epoxy adhesive that satisfies all the conditions of the adhesive selection criteria (bonding member properties, bonding strength, use environment, coating process, curing process) is finally selected as Terokal 4555B of Henkel Korea Co., Ltd. It was.

Referring to the bonding process between the dissimilar material components using the apparatus of the present invention configured as described above are as follows.

In the following description of the bonding process between dissimilar material components, it is assumed that the adhesive coating and curing apparatus 1 of the present invention is designated as an adhesive coating apparatus or an adhesive curing apparatus according to the process. That is, it demonstrates on the assumption that it is named by the adhesive agent application apparatus in an adhesive agent application process, and it is described by the name of an adhesive agent hardening apparatus in an adhesive agent hardening process.

First, a structural adhesive (see FIG. 6A) and two parts of different materials (see FIG. 6B) are prepared.

At this time, the dissimilar material is a metal cylinder (S) and aluminum bracket (B).

Next, the bracket (B) is placed in the mounting groove 340a of the bracket fixing plate 340 of the jig (see FIG. 6C), and the fixing pin 400 is inserted and fixed (see FIG. 6D).

The device of the present invention is then inserted through the aperture of bracket B (see FIG. 6E). At this time, it is a matter of course that the adhesive (A) is pre-filled inside the cylinder of the adhesive applying and curing device (1).

On the other hand, after the insertion of the adhesive coating device of the present invention is completed, the piston 120a is advanced by a predetermined distance (ℓ) by turning the plunger 120b screwed to the stopper 140. Accordingly, the piston 120a By the pressing action, the adhesive A is discharged through the coating nozzle 100a and applied onto the inner circumferential surface of the through hole of the aluminum bracket B (see FIG. 6F).

When the adhesive (A) is applied, the fluidity of the adhesive (A) having a high viscosity is improved by heating the adhesive (A) to about 50 ° C. through the heat transfer cartridge (2) as a heat source.

Then, after the application of the adhesive (A) is completed, the adhesive applying device is once removed from the bracket (B) (see FIG. 6G), and the cylinder S to be joined to the bracket B is inserted into the through hole of the bracket B. Align the assembly position (see FIG. 6H).

After the assembly position of the bracket (B) and the cylinder (S) is aligned, the adhesive curing device is inserted into the through hole and the cylinder (S) of the bracket (B) and then heated to the curing temperature to proceed the curing process (Fig. 6i). Reference).

Curing proceeds for about 20 minutes at 180 ℃, and when the curing is completed, the cylinder (S) and the bracket (B) will maintain a solid bonding state (see Figure 6j).

Hereinafter, the effect | action by the bonding apparatus of this embodiment is as follows.

When the hydraulic cylinder (S) and the bracket (B) are bonded as the structural adhesive (A) by using the adhesive applying and curing device (1) of the present invention, the hydraulic power steering system of a vehicle can be reduced in weight. Will be.

In particular, when replacing the bracket (B) for fixing the hydraulic cylinder (S) with aluminum alloy while securing the desired bonding force is possible to reduce the weight of about 20%.

In addition, the present invention can easily grasp the exact bonding position between the adherend, it is possible to secure the desired bonding force.

On the other hand, in the present invention, since the entire part including the adhesive portion does not have to be put in the heating furnace, the thermal energy required for curing the adhesive A can be reduced, and temperature control to an appropriate temperature is possible.

In addition, the coating and curing apparatus 1 according to the present embodiment is a coating-curing combined device that is applied to both the coating process and the curing process of the adhesive A, and needs to be manufactured separately as it is used for both processes. none.

And, through the cylindrical body 100, the heat transfer cartridge (2) that can apply heat energy for improving the adhesiveness (A) fluidity at the time of application or curing at the adhesion site is installed, to increase the fluidity of the adhesive during the application process or During the curing process, thermal energy is applied to the adhesive to cure the adhesive.

In particular, the device of the present invention was equipped with a heat source (ie, a heat transfer cartridge) to increase the fluidity of the adhesive (A), it was possible to obtain a higher adhesive flow rate at the same pressure, the heat source temperature is determined to be 50 ℃ It was.

If the temperature is high, there is a fear that the curing reaction is started during the application process due to the continuous use, if the flow rate is too high it is difficult to control the amount of adhesive coating.

On the other hand, the adhesive curing time by the apparatus of the present invention is 20 minutes, and exhibits a bonding strength equivalent to that of general chamber curing.

In the case of the chamber type curing, it is suitable for a large structure such as an automobile body by heating the adhesive (A) by increasing the environmental temperature around the test piece, but in a small structure such as a cylinder (S) for a power steering system, the direct The heating method is more suitable because it consumes less energy.

In addition, in the case of chamber-type curing, the temperature distribution is not constant according to the chamber position. Therefore, uneven curing may be caused. However, in the case of direct heating by the heat transfer cartridge 2 as in the present invention, the desired position can be locally heated. There is an advantage that can be cured in time.

Hereinafter, in Embodiments 2 to 5, another configuration of the pressing means for discharging the adhesive A will be described.

[Example 2]

This embodiment shows another example of the structure of the pressing means for applying the adhesive (A).

Fig. 7A is a configuration diagram showing a pressing means of a steering method, and this embodiment shows a case in which the adhesive A is discharged to the steering element, but the steering element is driven by a motor. That is, when power is applied to the motor to drive the motor, the steering element rotates to push the adhesive A out.

This embodiment is different from the structure and action of the above-described embodiment 1 in that the pressurization action can be made automatically by the motor, and that the continuous supply of the adhesive A can be made through the inlet.

[Example 3]

This embodiment shows another structural example of the pressing means for applying the adhesive (A). That is, Figure 7b is a configuration and operation of the pressure means of the gear type, the adhesive (A) coming in through the inlet is pushed to the outlet side through the gear to rotate with each other.

The present embodiment is different from the above-described embodiment 1 in terms of structure and operation in that pressurization is performed by gear driving and continuous supply of adhesive A can be made through the inlet.

Example 4

This embodiment shows another structural example of the pressing means for applying the adhesive (A). That is, Figure 7c is a configuration and operation of the needle-type pressing means, the adhesive (A) coming through the inlet is transferred to the outlet side through the pressing action according to the movement of the needle (N).

The present embodiment is different from the above-described embodiment 1 in terms of structure and operation in that pressurization is performed by the needle and continuous supply of the adhesive A can be achieved through the inlet.

[Example 5]

This embodiment shows another structural example of the pressing means for applying the adhesive (A). That is, Figure 7d is a configuration and action diagram according to another embodiment of the piston-type pressing means, and the adhesive (A) coming through the inlet is transferred to the outlet side through the pressing action according to the movement of the plunger.

The structure of the present embodiment is the same as in the first embodiment described above that the adhesive (A) is injected by the pressure action of the piston, but the first embodiment described above in that the continuous supply of the adhesive (A) can be made through the inlet There is a difference in structure and function from.

The present invention is not limited to the above embodiments, and various changes and modifications can be made without departing from the scope of the technical spirit of the present invention. Accordingly, the rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and those skilled in the art can make various modifications and adaptations within the scope of the claims. It is self evident.

The present invention can be easily joined while maximizing the bonding strength by applying the appropriate heat while fixing the two parts to be attached at the correct position during the assembly process between the components of different materials, such as the power steering cylinder (S) and the bracket (B) It is an invention that is highly applicable to the industry, such as weight reduction of vehicle parts such as hydraulic power steering system of automobiles and improvement of workability.

S: Cylinder B: Bracket
A: Adhesive P: Push pin
1: adhesive application and curing apparatus 100: cylindrical body
100a: coating nozzle 120a: piston
120b: Plunger 140: stopper
2: heat transfer cartridge 200: housing
3: guide jig 300: base
320: guide plate 320a: semicircular guide groove
340: Bracket fixing plate 340a: Seating groove
360b: Pin groove 400: Locking pin
500: Handle

Claims (12)

A cylindrical body (100) formed to have a hollow tube shape, in which an adhesive (A) is injected, and a coating nozzle (100a) through which the adhesive (A) is discharged through one side;
It is coupled to one end of the cylindrical body 100 to press the adhesive (A) injected into the cylindrical body 100 toward the coating nozzle (100a) to discharge the adhesive (A) to the outside through the coating nozzle (100a) Pressing means;
Adhesive means for bonding between the heterogeneous material component, characterized in that it comprises a; heating means for heating the adhesive (A) injected inside the cylindrical body 100 is coupled while closing the other end of the cylindrical body (100) And curing device. The method of claim 1,
Wherein the pressing means comprises:
The plunger 120b is installed to penetrate through the stopper 140 provided at one end of the cylindrical body 100, and the thread is formed on the outer circumferential surface thereof, and is coupled to the tip of the plunger 120b to be injected into the cylindrical body 100. Adhesive application and curing device for bonding between different material components, characterized in that it comprises a piston (120a) for pressing the adhesive (A) to discharge. The method of claim 1,
The coating nozzle (100a) is formed on the surface of the cylindrical body 100, a plurality of adhesive coating and curing apparatus for bonding between the different material components, characterized in that formed at regular intervals apart along the circumferential direction. The method of claim 1,
The heating means, the adhesive coating and curing device for bonding between the heat transfer cartridge (2), and a temperature sensor mounted to detect the temperature of the cylindrical body (100). The method of claim 1,
The heating means, the adhesive coating and curing device for bonding between different material parts, characterized in that the temperature sensor built-in heat transfer cartridge (2). 6. The method according to any one of claims 1 to 5,
At the time of bonding the cylinder S, which is a different material and the bracket B adhered thereto, a guide jig 3 for fixing the bracket B and guiding the installation position of the adhesive A application and curing device is provided. Adhesive applying and curing apparatus for bonding between dissimilar material parts, characterized in that further provided. The method according to claim 6,
The guide jig 3,
A base 300;
A plurality of pairs of guide plates 320 fixed to the base 300 and having two pairs of plates formed with semi-circular guide grooves 320a formed therein;
Adhesive coating and curing device for bonding between different material components, characterized in that it comprises a; fixed to the base 300, the bracket fixing plate 340 for fixing the bracket (B) to be adhered to the cylinder (S) . The method of claim 7, wherein
The bracket fixing plate 340 is an adhesive coating and curing device for bonding between different material components, characterized in that the mounting groove (340a) is formed to prevent the flow of the bracket (B) is seated. The method of claim 7, wherein
The guide plate 320 and the bracket fixing plate 340 is detachably coupled to the base 300, characterized in that the adhesive coating and curing device for bonding between the different material parts. The method of claim 2,
Adhesive application and curing device for bonding between dissimilar material components, characterized in that the drive of the plunger (120b) is made by a motor. The method of claim 1,
The pressurizing means is a device for applying and curing adhesive for bonding between dissimilar material parts, characterized in that the gear unit for feeding the adhesive (A) coming through the inlet to each other and rotates the gear unit to be pushed to the outlet side. The method of claim 1,
And said pressing means is a needle (N) for pushing the adhesive (A) coming in through the inlet to the outlet side.

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