KR20110021446A - Formation method and the system of fluidal seal style engine mount case - Google Patents

Abstract

PURPOSE: A formation method of a fluid-sealed engine mount case and an apparatus thereof are provided to improve the productivity of a production company and guarantee the safety of producers. CONSTITUTION: A formation method of a fluid-sealed engine mount case comprises following steps. A partial extension pipe(RP) is formed to maintain a rounding part(C4) between a single pipe part(C1) and an expanding part(C2). The rounding part maintains a right angle between the single pipe part and the expanding part. The expanding part of a border molding pipe is fitted into the external diameter of the extension pipe inner diameter part. A curling molding ring is formed on the outer surface of the single pipe part. A curling incline is inserted into the inner diameter incline of the curling molding ring. The single pipe part end caliber is expanded in the curling incline and inside diameter incline with the angle of inclination to outside. A case(C) is formed at the end of the single pipe part to maintain a curling part.

Description

Forming method and apparatus thereof for fluid-sealed engine mount case

The present invention relates to a method for forming a fluid-filled engine mount case and a device thereof, and more particularly, a plurality of molds having a short pipe as a material and constituting molds of different shapes up and down in one press machine. The present invention relates to a method for forming a fluid-filled engine mount case and a device for mounting a case having a desired shape while preventing the bursting of the weld bead portion held in the end pipe by sequentially injecting into each mold.

In general, in the engine, considerable vibration occurs due to the periodic change of the center position due to the vertical movement of the piston and the connecting rod, the inertia force of the reciprocating portion occurring in the cylinder axis direction, and the periodic change of the rotation force applied to the crank shaft by the connecting rod. .

The engine is supported on the chassis frame or the body, but an engine mount using an insulator is applied to the mounting part so that the vibration of the engine is transmitted to the chassis frame or the body.

However, the above-mentioned insulator alone had insufficient defects to adequately absorb the complex vibration of the engine, which is widely spread over a wide frequency band, and a fluid-sealed engine mount with superior damping capability was developed and applied to solve such a defect. It's happening.

As shown in FIG. 7, the fluid encapsulated engine mount according to the related art includes a core 4 having a center bolt 2 coupled to the engine at the center thereof, and an outer circumferential surface of the core 4 therein. The insulator 1, in which the fluid chamber 6 is formed, is vulcanized and bonded to the outer circumferential surface of the insulator 1, and the case C is vulcanized and the displacement of the insulator 1 in front, rear, left and right directions. The housing 5 is connected to the upper edge portion of the case C.

Here, the housing 5 is curled such that its lower edge portion is bent outwardly, and the case C is curled upwardly with its upper edge portion surrounding the lower edge portion of the housing 5 (" A " portion), and a mounting bracket (not shown) is a press-fit installation on the outer circumferential surface of the case (C) and constitutes a universal fluid-enclosed engine mount.

The case of the fluid-mounted engine mount configured as described above is a component that functions as a main body for maintaining the engine mount. The quality of the engine mount is changed by the durability of the case. It can be seen that the quality is different, so the case production method and configuration are important.

Conventional engine mount cases typically require steel plates to be produced through various processes in a press machine, and to perform each process through sheet metal working using a steel plate that maintains a constant thickness. In order to form the case, the steel plate itself has a lot of shape changes, so the deformation inside the case itself is severe and ductile fracture occurs due to the strain rate, or the durability of the case itself is weakened. In addition to the problem of deterioration and the quality of the engine mount itself, a separate annealing or heat treatment process must be performed separately to compensate for this, and a number of presses are required to maintain a certain pressure or more, thereby increasing the production cost. Such as higher production costs There has been a problem.

Recently, the plastic pipe is deformed to produce the engine mount case of the required shape, so that the deformation rate of the short pipe itself is not high, and the steps of plastic deformation are reduced. While there is an advantage in producing the case for the engine mount of the required shape, while the weld bead portion formed in the single pipe itself is destroyed or deformed during plastic deformation, another problem occurs that the quality of the engine mount itself is reduced due to the case. In the case of the case, the manufacturer of the case or the assembly of the case and other parts to produce the engine mount has not been able to provide a solution.

Therefore, the present invention will be developed in order to eliminate the above problems, by forming the expansion tube forming apparatus, the boundary forming apparatus and the curling unit forming apparatus in a set of molds respectively, the single tube in the single hydraulic press machine, the expansion tube forming, boundary portion It is possible to produce high quality engine mount case at low cost by not damaging the weld bead part provided in the short pipe to form the case in which the expansion part in which the fluid attenuation unit is mounted and the curling part in combination with the housing are molded by molding and curling part molding process alone. It is intended to solve the above problems by providing a manufacturing method and the device to enable it.

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

The upper die 4 is provided on the upper plate 4 of the hydraulic press 1 having an upper plate 4 which moves upward and downward by the upper cylinder 2 at the upper portion and a lower cylinder 3 and a lower fixing plate 5 at the lower portion thereof. And inserting a short pipe (SP) into the mold to allow the upper and lower molds to be separated by the movement of the upper plate 4 by constituting the lower molds on the lower fixing plate 5, respectively, by operating the hydraulic press 1. A method and apparatus for forming a fluid-enclosed engine mount case using a short pipe (SP) for molding a short pipe (SP) according to a form;

Mounting and fixing the upper die plate 11 on the bottom surface of the upper plate (4) and fixed the lower die plate 12 on the upper surface of the lower fixing plate (5), but the expansion punch 21 and the boundary forming punch at the bottom of the upper die plate (11) (31) and fixing the curling punch (41) to be fixed at regular intervals and fixed to the expansion mold (22), the boundary molding mold (32) and the curling molding mold (42) on the lower die plate 12, respectively. When the upper die plate 11 is lowered, the expansion punch 21 is positioned at the upper end of the expansion mold 22 to form the expansion device 20, and the boundary molding punch 31 is positioned at the upper edge of the mold forming mold 32. The boundary forming apparatus 30, and the curling forming punch 41 is located on the top of the curling molding die 42 to form a curling forming apparatus 40, each seating device is configured in the center of each individual device The lower end of the discharge pin 14 constituting the lower end of the lower part of the lower die plate 12 and the lower fixing plate 5 and By constructing a more 3-forming device 10, which is fixed at the top comprises a discharge plate (13) to move up and down;

A short pipe (SP) is seated on an upper end of the seating hole (24) of the expansion mold (22) configured in the molding apparatus (10), and then the seating hole (24) is lowered and the expansion punch (21) of the expansion body (23) Inserted into the expansion pipe 26 formed in the upper portion to expand the upper portion of the short pipe (SP) retained in the expansion space 26 with the expansion pipe 21 to form the expansion pipe portion (C2), but the original pipe pipe portion (C1) An expansion pipe forming step of forming a part of the expansion pipe (RP) holding the rounding portion (C4) between the expansion pipe (C2) and the expansion pipe (C2);

On the upper end of the seating hole 34 of the boundary molding mold 32 formed in the molding apparatus 10, a part of the enlarged pipe RP formed in the expansion pipe forming process is seated so that the expansion pipe C2 is positioned, and then the seating hole 34 is placed. At the same time, the edge forming punch 31 is inserted into the expansion pipe holding space 36 formed at the upper portion of the boundary molding body 33 so that the rounded portion C4 of the partial enlarged pipe RP is formed at the boundary molding mold ( Boundary shaping pipe which maintains the boundary part C5 which maintains the right angle between a short pipe part C1 and an expansion pipe part C2 by the outer diameter interface 37 of 32 and the inner diameter interface 38 of the boundary forming punch 31. FIG. An edge forming step for forming (BP);

Expansion portion C2 of the boundary portion forming tube BR formed in the boundary portion forming step to the outer diameter of the expansion tube inner diameter portion 44a formed in the seating hole 44 of the curling portion molding mold 42 formed in the molding apparatus 10. And the curling molding ring 45 is maintained at the outer diameter of the short pipe portion C1, and then the seating hole 44 is lowered and the curling inclined surface 49 of the curling punch 45 is curled. Inserted into the inner inclined surface 48 of 45) the end diameter of the short pipe portion (C1) is enlarged to the outside by the inclination angle to the curling inclined surface (49) and the internal inclined surface (48), the end of the short pipe portion (C1) enlarged curling surface ( 46) it is out of the curling surface 46 flaring while in close contact with the short pipe section (C1), the end portion is bent to the outside curling portion (short pipe while passing through the curling portion forming step of forming a case (C) for holding the C3) respectively, It characterized in that the (SP) to be molded into the case (C) for the engine mount.

As described above, the molding method for the fluid-mounted engine mount case of the present invention and the apparatus are configured by expanding a single tube forming apparatus, a boundary forming apparatus, a curling forming apparatus, and a curling forming apparatus in a single mold. The case of various specifications according to the size change or shape change of the engine mount is made by forming a case in which the expansion portion on which the fluid attenuating unit is mounted and the curling portion engaging with the housing are molded only by the expansion portion forming, boundary forming, and curling forming process. Can be produced only by replacing each molding machine without changing the whole device, and each process can be performed simultaneously in one operation in each hydraulic press, and the welding bead portion of the short pipe is not damaged. Fast and safe high quality engine mount case It is a great invention that is expected to be applied in the case production site that ensures the safety of the producers and improves the productivity of the producers by enabling them to be produced easily.

What is claimed is: 1. A method of forming a case for a fluid enclosed engine mount case using a short pipe formed into a case C having a shape requiring a short pipe SP through a molding process using the hydraulic press 1;

A short pipe (SP) is seated on an upper end of the seating hole (24) of the expansion mold (22) of the molding apparatus (10), and then the seating hole (24) is lowered, and at the same time, the expansion punch (21) is placed on the upper part of the expansion body (23). Inserted into the formed expansion space (26) to expand the upper portion of the short pipe (SP) retained in the expansion space (26) with a expansion punch (21) to form an expansion pipe (C2), but the expansion of the original pipe with the original pipe (C1) An expansion pipe forming step of forming a part of the expansion pipe (RP) holding the rounding portion (C4) between the pipe portion (C2);

At the top of the seating hole 34 of the boundary molding mold 32 of the molding apparatus 10, a part of the enlarged pipe RP held by the expansion pipe C2 is placed at the top, and then the seating hole 34 descends and the boundary part at the same time. The molding punch 31 is inserted into the expansion pipe holding space 36 formed at the upper portion of the boundary molding body 33 so that the rounded portion C4 of the partial expansion pipe RP is the outer mirror surface of the boundary molding mold 32. boundary to form a short pipe section (C1) and the expansion pipe border forming pipe (BP) for holding the boundary portion (C5) which at a right angle between (C2) by an internal mirror surface of 48 and the boundary forming punch 31 is formed Process ;

The expansion pipe C2 is held at the outer diameter of the expansion pipe inner mold 44a of the curling part molding mold 42 of the molding apparatus 10 so that the boundary forming pipe BP is seated at the seating hole 44, and then the curling molding ring ( 45) is maintained at the outer diameter of the short pipe portion (C1), and then the seating hole 44 is lowered and the curling inclined surface 49 of the curling punch (41) is internally inclined surface (48) of the curling molding ring (45). While extending the inner diameter of the end of the short pipe portion (C1) by the inclination angle to the curling slope (49) and the internal inclined surface (48), the end of the enlarged short pipe portion (C1) is in close contact with the curling surface (46) is flaring out of the 46) short pipe section (C1) end portion is bent toward the external casing for the curling portion (C3) a short pipe (SP) only curling portion forming step of forming the case (C) maintaining the engine mount (C) This process is to be molded by the molding apparatus of the following case for the fluid-sealed engine mount.

The upper die 4 is provided on the upper plate 4 of the hydraulic press 1 having an upper plate 4 which moves upward and downward by the upper cylinder 2 at the upper portion and a lower cylinder 3 and a lower fixing plate 5 at the lower portion thereof. And inserting a short pipe (SP) into the mold to allow the upper and lower molds to be separated by the movement of the upper plate 4 by constituting the lower molds on the lower fixing plate 5, respectively, by operating the hydraulic press 1. A molding apparatus for a fluid-enclosed engine mount case using a short pipe SP for molding the short pipe SP according to a form;

Mounting and fixing the upper die plate 11 on the bottom surface of the upper plate (4) and fixed the lower die plate 12 on the upper surface of the lower fixing plate (5), but the expansion punch 21 and the boundary forming punch at the bottom of the upper die plate (11) (31) and fixing the curling punch (41) to be fixed at regular intervals and fixed to the expansion mold (22), the boundary molding mold (32) and the curling molding mold (42) on the lower die plate 12, respectively. When the upper die plate 11 is lowered, the expansion punch 21 is positioned at the upper end of the expansion mold 22 to form the expansion device 20, and the boundary molding punch 31 is positioned at the upper edge of the mold forming mold 32. The boundary forming apparatus 30, and the curling forming punch 41 is located on the top of the curling molding die 42 to form a curling forming apparatus 40, each seating device is configured in the center of each individual device The lower end of the discharge pin 14 constituting the lower end of the lower part of the lower die plate 12 and the lower fixing plate 5 and It is configured to a molding apparatus 10 including a discharge plate 13 is fixed to the upper end of the lining (3) to move up and down.

First, as shown in FIG. 4 and FIG. 9, the upper mold plate 11 is fixed to the lower surface of the upper plate 4 which is fixed to the lower end of the upper cylinder 2 of the hydraulic press 1 and moves up and down, and the lower fixing plate. (5) The lower die plate 12 is fixed to the upper surface, and the expansion punch 21, the boundary forming punch 31, and the curling forming punch 41 are fixed to the lower portion of the upper die plate 11 at fixed intervals. The expansion mold 22, the edge forming mold 32, and the curling molding die 42 are fixed to the upper end of the mold plate 12 so that the expansion punch 21 when the upper mold die 11 is lowered, the expansion mold 22 ) Located at the top to form the expansion device 20, the boundary forming punch 31 is located at the top of the boundary forming mold 32 to constitute the boundary forming device 30, the curling forming punch 41 curling Positioning openings 24, 34, 44 positioned on the center of each individual device to form a curling part molding device 40 is located on the upper side of the mold (42) Discharge pins 14 constituting the lower end protrudes into the lower die plate 12 and the lower fixing plate 5 and fixed to the lower cylinder (3) upper end to the lower end fixed to the discharge plate 13 to move up and down To form the molding apparatus 10.

Through the expansion apparatus 20, the boundary molding apparatus 30 and the curling molding apparatus 40, which are configured to be divided into the molding apparatus 10 of the present invention configured as described above, respectively, The expansion device 20, the edge forming device 30, and the curling forming device 40 operate simultaneously so that the curling forming process is carried out, and the expansion process, the boundary forming process, and the curling forming process are performed simultaneously in one process. It is to be made to produce a case (C) for the fluid-enclosed engine mount of the shape required by one operation in one hydraulic press (1).

That is, as shown in FIG. 4, when the discharge plate 13 fixed to the upper end of the lower cylinder 3 of the hydraulic press 1 rises, the discharge pin 14 configured in each device rises, and each seating hole ( 24) (34) (44) ascending and descending the discharge plate 13, each seat 24, 34, 44 will be lowered due to its weight, so each process in each device This process is made at the same time and the molded products to be held in each mold after each process is made to lift the discharge pin 14 to the discharge plate 13 at the same time, each seating hole 24, 34, 44 is raised to the molded product It is a structure to facilitate the seating and discharging.

The manufacturing method for forming the short pipe (SP) into the fluid-filled engine mount case (C) through the forming device (10) operating as described above is the expansion device (20) configured to be divided into each forming device (10) and Through the boundary shaping device 30 and the curling shaping device 40, each expansion process, the border shaping process, and the curling shaping process are performed. Each device forming method is configured and operated as follows.

First, as shown in Figure 6, the expansion device 20 has a lower surface of the lower die in the state in which the seating holes 24 protruding the seating protrusions 25 for seating the short pipe SP in the center of the upper cross section (Fig. 6). Expansion pipe mold 22 having a predetermined size round surface 27 formed on the lower surface of the expansion space 26 formed by expanding the upper end of the diameter of the cylindrical expansion pipe body 23 fixed to 12, and the upper surface is the prize The cylindrical expansion pipe punch 21 is fixed to the template 11 to form a rounded corner 21a of a rounded corner.

The expansion pipe forming step of expanding one side of the end pipe SP using the expansion device 20 configured as described above is performed, and as shown in FIG. 5A, first, the discharge plate of the molding device 10 is formed. (13) by raising the discharge pin (14) to the upper seating hole (24) protruding seating projections protruding to the top of the seating hole (24) of the expansion device (20) in the state of raising the inside of the expansion body (23) ( 25) One end of the end pipe (SP) is seated, and then the upper cylinder (2) and the lower cylinder (3) of the hydraulic press (1) is lowered, and the seating hole (24) descends and the expansion punch (21) is expanded. By inserting into the expansion pipe | tube 26 formed in the upper part of the main body 23, the upper part of the end pipe SP hold | maintained in the expansion pipe 26 is expanded by the shape of the expansion pipe 21 and the expansion pipe C2. To form a part of the expansion pipe RP to maintain a state in which the expansion part C2 holding the rounding part C4 having the same shape as the expansion space 26 is formed. It is to be holy.

At this time, the lower edge portion of the expansion pipe 21 is formed in a round 21a, and the round surface 27 is formed at the lower portion of the expansion pipe C2 of the expansion pipe mold 22, thereby rounding the diameter of the upper end of the short pipe SP. Since the lower end of the portion 21a is brought into close contact with each other to gradually widen, not only the expansion work is facilitated, but also the expansion pipe C2 having one side of the short pipe SP widened due to the expansion pipe 21 and the expansion pipe C2. While rounding part 27 and round 21a are formed, rounding part C4 is formed, so that one end of the short pipe SP is expanded and becomes expanding part C2 while the welding bead part is maintained in the short pipe by rounding part C4. The function to prevent the damage of the expansion pipe forming process is made easily.

In addition, as shown in FIG. 7, the boundary forming apparatus 10 has a lower end surface with a seating hole 34 protruding from the seating protrusion 34a for mounting a part of the enlarged tube RP in the center of the upper cross section. Boundary molding die (32) formed of an outer diameter interface 37 to keep the bottom surface of the holding space 36 formed by extending the upper end of the aperture of the cylindrical boundary molding body 33 fixed to the lower die 12 ) And an inner diameter interface 38 in which an upper end surface is fixed to the upper die plate 11 to form an enlarged diameter portion 31a and a retaining diameter portion 31b, the diameter of which is narrowed downward, while the lower surface of the expanded diameter portion 31a is kept parallel. The boundary portion forming punches 31 formed by) are formed in a pair.

Due to the configuration of the boundary forming apparatus 10, the boundary forming process of forming the rounding portion C4 of the partially enlarged tube RP on which one side is extended to the boundary portion C5 is performed. As shown in the drawing, the discharge plate 13 of the molding apparatus 10 is raised to push the discharge pin 14 upward, and the seating protrusion 34 is raised in the boundary molding body 33. The lower end of the partial enlarged end pipe (SP), the upper part of which is expanded, is lowered, and then the upper cylinder (2) and the lower cylinder (3) of the hydraulic press (1) are lowered so that the seating hole (34) descends and the boundary forming punch ( By inserting 31 into the holding space 36 formed on the upper portion of the boundary molding body 33, the outer diameter of the partially enlarged end pipe SP is maintained at the aperture of the boundary molding body 33 and the outer diameter of the expansion tube C2 is increased. In the state seated in the holding space 36, the holding neck portion 31b is inserted into the diameter of the portion of the enlarged end pipe SP. The inner diameter interface 38 held between the enlarged diameter portion 31a and the retaining diameter portion 31b while the enlarged diameter portion 31a is inserted into the diameter of the pipe portion C2 is the inner diameter of the rounded portion C4 of the partially enlarged end pipe SP. The pressure-sensitive adhesive is pressed to form the boundary forming pipe BP holding the boundary portion C5 in which the rounded portion C4 is formed to be parallel to the inner diameter boundary 38 and the outer diameter boundary 37.

In addition, the curling unit forming apparatus 10 also has a lower end in the state in which the seat hole 44 formed with the expansion inner diameter portion 44a and the retaining inner diameter portion 44b, the diameter of which is narrowed to the upper end, as shown in FIG. 8. The curling part mold 42 having an inclined surface 43a having an inclined upper end portion of the cylindrical curling part forming body 43 whose surface is fixed to the lower die plate 12 is formed to be inclined, and the upper and lower surfaces are kept parallel to the outer diameter. Curling forming ring 45 is formed to form an outer inclined surface 47 to maintain the upper diameter of the upper portion of the inner diameter slope 48 to the upper portion of the upper end of the circular aperture maintaining a constant diameter, the central portion is bilaterally symmetrically And a curling punch forming punch 41 having a curling inclined surface 49 whose diameter is narrowed to the bottom at the center of the curling surface 46 having the upper surface fixed to the upper die plate 11 and the lower surface being parallel. It is composed of groups.

 Due to the configuration of the curling part forming apparatus 10, curling part molding in which the curling part C3 is formed by bending the end surface of the short pipe part C1 of the boundary part forming pipe BP holding the boundary part C5 to the outside. As shown in (c) of FIG. 5, the discharge plate 13 of the forming apparatus 10 is raised to push the discharge pin 14 upward, and the seating hole 44 is raised to expand the inside of the pipe. A state in which the curling molding ring 45 is closely connected to the outer diameter of the short pipe portion C1 of the boundary forming pipe BP while the neck portion 44a and the holding inner diameter 44b are raised inside the curling molding body 43. The upper cylinder 2 and the lower cylinder 3 of the hydraulic press 1 are lowered in the state where the expansion pipe diameter 44a is inserted into the diameter of the furnace expansion pipe C2, and the seating port 44 descends. The curling inclined surface 49 is inserted into the inner inclined surface 48 formed on the upper portion of the curling molding ring 45, so that the outer diameter is inclined to the inclined surface 43a of the curling molding die 42. While maintaining the inclined surface 47, the short pipe portion C1 is fixed, and the curling slope 49 is lowered, thereby expanding the inner diameter of the end of the short pipe portion C1 of the boundary forming pipe BP and expanding the short pipe portion (1). C1) while the end is in close contact with the curling surface 46, the end is extended to the outside of the curling surface 46, and the end portion of the short pipe portion C1 is bent to the outside to form the curling portion C3.

Expansion unit forming process in one process due to the molding apparatus of the present invention having each apparatus divided into expansion apparatus 20, boundary forming apparatus 10 and curling portion forming apparatus 10 configured as described above The three process operations, which are divided into the forming process and the boundary forming process and the curling forming process, are simultaneously performed, and the weld bead portion of the single pipe SP is not damaged due to the detailed configuration of the devices 20, 30 and 40 for each part. It would be a very useful invention that can easily produce a case (C) to maintain the roundness of the circular shape while improving productivity and quality and reducing costs.

At this time, the switch for operating the upper cylinder (2) and the lower cylinder (3), which is a component of the hydraulic press (1) in order to proceed with the molding process by operating the molding apparatus 10 and various sensors and various associated with it This is to operate and proceed through the electric / electronic control system of the electric valve, which is to use a separate control device by applying a control method that can be commonly used in mechanical equipment, and a detailed description thereof will be omitted. . (Not shown)

1 is a block diagram of a molding process showing a preferred embodiment of the present invention

Figure 2 is a cross-sectional perspective view of the case showing a preferred embodiment of the present invention.

Figure 3 is a modified cross-sectional view of the product according to the molding procedure showing a preferred embodiment of the present invention.

Figure 4 is a block diagram of a molding apparatus showing a preferred embodiment of the present invention

(A) is a block diagram of the upper and lower devices separated.

(B) is a block diagram of the state in which the upper and lower devices are attached and fastened.

Figure 5 (a) (b) (c) is an operating state diagram showing the operating state of each device and the molding state of the product according to the molding procedure showing a preferred embodiment of the present invention.

Figure 6 is an exploded perspective view showing the configuration of a preferred expansion device of the present invention.

7 is an exploded perspective view showing the configuration of a preferred boundary forming apparatus of the present invention.

8 is an exploded perspective view showing the configuration of a preferred curling unit forming apparatus of the present invention.

9 is a configuration diagram showing a preferred embodiment of the present invention.

10 is an exemplary use state of the case produced by the present invention.

Explanation of symbols on important parts of drawing

1: hydraulic press 2: upper cylinder

3: lower cylinder 4: top plate

5: lower fixing plate 10: molding apparatus

11: prize plate 12: die plate

13: Drain plate 14: Drain pin

20: expansion device 21: expansion punch

22: expansion mold 24,34,44: seating hole

26: expansion space 30: boundary molding apparatus

31: Boundary Molding Punch 32: Boundary Molding Mold

36: holding space 40: curling forming apparatus

41: curling molding punch 42: curling molding mold

45: curling ring forming ring 49: curling slope

C: Case C1: Short Pipe

C2: Expansion part C3: Curling part

C4: rounding part C5: boundary part

SP: Single Pipe RP: Partial Expander

BP: boundary forming tube

Claims (5)

What is claimed is: 1. A method of forming a case for a fluid enclosed engine mount case using a short pipe formed into a case C having a shape requiring a short pipe SP through a molding process using the hydraulic press 1; A short pipe (SP) is seated on an upper end of the seating hole (24) of the expansion mold (22) formed in the molding apparatus (10), and then the seating hole (24) is lowered, and at the same time, the expansion punch (21) is upper part of the expansion body (23). Inserted into the expansion pipe 26 formed in the expansion pipe (21) to the upper portion of the expansion pipe (26) retained in the expansion pipe (21) to form a expansion pipe (C2) to form the expansion pipe (C1) and the original state An expansion pipe forming step of forming a portion of the expansion pipe (RP) holding the rounding portion (C4) between the expansion pipe (C2); A part of the expansion tube RP formed in the expansion tube forming process is seated on the upper end of the seating hole 34 of the boundary molding mold 32 configured in the molding apparatus 10 so that the expansion part C2 is positioned, and then the seating hole 34 is placed. At the same time, the edge forming punch 31 is inserted into the expansion pipe holding space 36 formed on the upper portion of the boundary molding body 33 so that the rounded portion C4 of the part enlarged pipe RP is formed at the boundary molding die. Boundary shaping which maintains the boundary portion C5 which maintains a right angle between the short pipe portion C1 and the expansion pipe portion C2 by the outer diameter interface 37 of (32) and the inner diameter interface 38 of the boundary forming punch 31. A boundary forming step of forming a pipe (BP); Expansion portion C2 of the boundary portion forming tube BR formed in the boundary portion forming step to the outer diameter of the expansion tube inner diameter portion 44a formed in the seating hole 44 of the curling portion molding mold 42 formed in the molding apparatus 10. And the curling molding ring 45 is maintained at the outer diameter of the short pipe portion C1, and then the seating hole 44 is lowered and the curling inclined surface 49 of the curling punch 45 is curled. Inserted into the inner inclined surface 48 of 45) the end diameter of the short pipe portion (C1) is enlarged to the outside by the inclination angle to the curling inclined surface (49) and the internal inclined surface (48), the end of the short pipe portion (C1) enlarged curling surface ( And a curling part forming process of expanding to the outside of the curling surface 46 while being in close contact with 46) to form the case C holding the curling part C3 by bending the end of the short pipe part C1 to the outside. Molding method of fluid-sealed engine mount case The upper die 4 is provided on the upper plate 4 of the hydraulic press 1 having an upper plate 4 which moves upward and downward by the upper cylinder 2 at the upper portion and a lower cylinder 3 and a lower fixing plate 5 at the lower portion thereof. And inserting a short pipe (SP) into the mold to allow the upper and lower molds to be separated by the movement of the upper plate 4 by constituting the lower molds on the lower fixing plate 5, respectively, by operating the hydraulic press 1. In the molding apparatus of the fluid-enclosed engine mounting case using the short pipe to form the end pipe (SP) according to the form; Mounting and fixing the upper die plate 11 on the bottom surface of the upper plate (4) and fixed the lower die plate 12 on the upper surface of the lower fixing plate (5), but the expansion punch 21 and the boundary forming punch at the bottom of the upper die plate (11) (31) and fixing the curling punch (41) to be fixed at regular intervals and fixed to the expansion mold (22), the boundary molding mold (32) and the curling molding mold (42) on the lower die plate 12, respectively. When the upper die plate 11 is lowered, the expansion punch 21 is positioned at the upper end of the expansion mold 22 to form the expansion device 20, and the boundary molding punch 31 is positioned at the upper edge of the mold forming mold 32. The boundary forming apparatus 30, and the curling forming punch 41 is located on the top of the curling molding die 42 to form a curling forming apparatus 40, each seating device is configured in the center of each individual device The lower end of the discharge pin 14 constituting the lower end of the lower part of the lower die plate 12 and the lower fixing plate 5 and Molding apparatus for a fluid-enclosed engine mount case, characterized in that the discharge plate 13 is fixed to the upper end of the linder (3) to move up and down. The method of claim 2; The expansion device 20 has a diameter of the cylindrical expansion pipe body 23 having a lower surface fixed to the lower die plate 12 in a state in which a seating hole 24 protruding the mounting protrusion 25 is formed at the center of the upper end face. An expansion mold (22) having a predetermined size round surface (27) formed on the lower surface of the expansion space (26) formed by expanding the upper portion, and the upper surface is fixed to the upper mold plate (11) to round the bottom edge of the round ( A molding apparatus for a fluid-sealed engine mount case, characterized in that the cylindrical expansion punch (21) formed of 21a is configured in a pair. The method of claim 2; The boundary forming apparatus 10 has a cylindrical boundary forming body 33 having a bottom surface fixed to the lower die plate 12 in a state in which a seating hole 34 protruding the mounting protrusion 34a is formed at the center of the upper end face. Boundary molding die 32 formed by the outer diameter interface 37 to maintain the lower surface of the holding space 36 formed by extending the upper end of the aperture, and the upper surface is fixed to the upper mold plate 11 to the lower diameter The narrow diameter forming part 31a and the holding diameter part 31b which are narrowed are formed, but the boundary part punch 31 which consists of the inner diameter interface 38 which the lower surface of the expanding diameter part 31a keeps parallel is comprised by a pair, respectively. Molding apparatus for a fluid-sealed engine mount case, characterized in that. The method of claim 2; The curling part forming apparatus 10 has a lower surface of the lower die plate 12 in a state in which a seat hole 44 in which a diameter of the inner diameter portion 44a and a holding inner diameter portion 44b having different diameters is sequentially formed is embedded. Curling part forming mold 42 having an inclined surface (43a) formed inclined upper end portion of the cylindrical curling part forming body 43 is fixed to the) and the upper and lower surfaces are kept parallel and the diameter of the upper part of the outer diameter is kept large Forming an external inclined surface 47 to form an internal inclined surface 48 that grows to the upper portion at the upper end of the circular aperture maintaining a constant diameter, but the center is divided into left and right symmetrical curling ring 45 and the upper surface of the prize The curling punch forming punches 41 having a curling inclined surface 49 whose diameter is narrowed to the lower end at the center of the curling surface 46 having the bottom surface parallel to each other are formed in a pair. Of the case for fluid-sealed engine mounts Type device.

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