KR20180057204A - Method of molding Bush and Bush - Google Patents

Abstract

Disclosed is a bush. The bush according to one embodiment of the present invention comprises: a bush body; a flange bent to an outer side of a radial direction from a upper end circumferential direction of the bush body, and formed with an opening angle between opposite surfaces facing each other in a bent state; and a cutting portion separated from each other in a shaft direction of the bush body from the bottom of the flange.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a bush,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a bush mounted on an oil filter housing of a vehicle, and more particularly, to a bush and a bush forming method for stably mounting the bush and improving productivity.

Generally, a vehicle is provided with a plurality of components in the periphery thereof based on an engine positioned in the engine room, and the components are fixed to the vehicle body or various frames.

Among the above components, the oil filter housing is fixed in such a manner that it is fastened to the engine block housing via the oil filter housing by bolts (B) to be fixed to the engine block housing.

The vehicle is trying to attenuate the vibration noise transmitted to the components in various ways because the vehicle travels along the road and receives the vibration transmitted from the ground or the vibration generated in the engine is directly or indirectly transmitted.

In addition, a method of directly fixing the frames to the frames through the bolts B for fixing the components, or a method of stably inserting the bolts B through bushing is mainly used .

The bush is used, for example, to minimize and stably fix unnecessary friction between the engine block housing and the oil filter housing when fixing the oil filter housing to the engine block housing using bolts (B).

The bush used in this way is mainly formed by a cold forging method. In the case of the cold forging method, if the ductility of the bush is insufficient, separate annealing must be performed.

In the cold forging method, the raw material in the form of a solid is cut into a uniform shape, and then a hole through which the bolt (B) is inserted is formed by pressurizing through the press machine. Since the hole is difficult to be formed at one time, The annealing treatment is carried out again after the annealing is carried out, and the annealing treatment must be carried out again after the press-forming, so that the workability of the operator is lowered, the productivity is lowered, and the cost is increased.

Further, distortion occurred during the hole processing of the raw material, dimensional tolerances were kept uneven, or impurities remained, which was still disadvantageous to increase productivity.

Korean Patent Publication No. 10-2010-0054236 (published on May 25, 2010)

Embodiments of the present invention are intended to provide a bush and a method of forming the bush that can be easily inserted into an oil filter housing of a vehicle by an operator and simultaneously improve productivity in molding.

The bush according to the first embodiment of the present invention includes a bush body; A flange bending radially outward from an upper circumferential direction of the bush body and having an opening angle between opposing mating surfaces in the bending state; And an incision spaced apart from each other along the axial direction of the bush body from below the flange.

The bush body is characterized in that the inner diameter decreases toward the lower side in the axial direction in the flange.

The flange having a first round formed along the inner circumferential direction while being bent radially outwardly from the bush body; And a second round portion formed along an outer circumferential direction to which the flange and the bush body are connected.

Wherein the first round portion has a larger radius of the rounded portion than the second round portion.

And the opening angle is maintained at any one of an inclination angle of 45 degrees or more and 90 degrees or less.

The incision including a first incision extending from the flange to a first length (L1) along an axial direction of the bush body; And a second incision extending from the first incision to a lower end of the bush body to a second length L2.

And the first incision portion and the second incision portion have different intervals in the circumferential direction of the bush body.

And the first incision portion has a reduced incision interval toward the second incision portion.

The bush according to the second embodiment of the present invention includes a bush body; A flange bending radially outward from an upper circumferential direction of the bush body and having an opening angle between opposing mating surfaces in the bending state; And an engaging portion is formed which is held in engagement with each other along the axial direction of the bush body from the lower side of the flange.

And the bush body is formed with an engaging portion that is held in a state of being engaged with each other along the axial direction in which the incision portion is formed.

Wherein the engaging portion includes a first mating surface and a second mating surface formed at positions opposed to each other with respect to an axial direction of the bush body, and a first engaging portion protruding from the first mating face toward the second mating face, And a second engaging portion formed on the second mating surface and into which the first engaging portion is inserted.

The first engaging portion and the second engaging portion may be formed in any one of a triangular shape or a polygonal shape.

The present embodiment is characterized in that it is used in an oil filter housing in which a bush is inserted.

The bush forming method according to the third embodiment of the present invention is a bush forming method in which a raw material wound in a coil form for forming a bush inserted into an oil filter housing installed in a vehicle is cut into a plate- step; A second forming step of bending one end of the cut bush body vertically to form a flange; A third shaping step of forming the bent bush body into a cylindrical shape after being moved by the pusher in a state where the bush body is located in the bushing mold; And a discharging step of discharging the bush formed into a cylindrical shape to the outside of the bush metal mold.

The second forming step includes forming the round in the inner circumferential direction of the bent flange to be larger than the round in the outer circumferential direction.

The third forming step may include a step of lowering the first shaping tool at the upper portion of the bushing mold so that the upper surface and the side surface of the bushing body are partly rounded. The second shaping tool is moved toward the end side surface of the bush body after the partial rounding of the bush body to fix the bush body, thereby temporarily fixing the bush body; The third shaping tool simultaneously moves toward both the left and right sides of the bush body at the left and right side positions with respect to the front surface of the bush body and then presses the bush body against the bushing mold frame so that the bottom surface of the bushing body is moved in the axial direction Molding in a cylindrical shape; And releasing temporary fixation to the bush body.

Wherein the step of forming the bottom surface of the bush body in a cylindrical shape in the axial direction includes maintaining a state in which a mating surface facing each other is spaced apart from the flange in a predetermined section along the axial direction of the bush body, State is maintained.

The third forming step includes the step of uniformly applying a predetermined pressure in the axial direction of the bush body after the bush body is formed into a cylindrical shape so that the spaced distance between opposing facing surfaces is constant .

The embodiments of the present invention can easily insert the oil filter housing into the oil filter housing regardless of the tolerance error by means of the cutout formed along the axial direction of the bushing so that the workability of the operator can be improved and the problems caused by the defects can be minimized have.

Embodiments of the present invention provide improved productivity over conventional cold forging and improved process safety without compromising strength, abrasion resistance, and other properties since high speed operation is possible through automated molding machines.

Embodiments of the present invention minimize the phenomenon of partial engagement when bolt (B) is inserted into the bushing so that the operator can quickly insert bolts (B) and mount the oil filter housing in the engine block housing, thereby improving workability.

1 is a perspective view showing a state where a bush according to a first embodiment of the present invention is inserted into an oil filter housing;
2 is a perspective view showing a bush according to a first embodiment of the present invention;
3 is a front view of a bush according to a first embodiment of the present invention;
4 is a plan view of a bush according to a first embodiment of the present invention;
5 is a sectional view taken along the line AA in Fig.
6 is a perspective view showing a bush according to a second embodiment of the present invention;
7 is a flowchart showing a bushing molding method according to a third embodiment of the present invention;
8 is a front view schematically showing a bush molding machine for molding a bush according to the present invention.
9 is a view showing a bushing forming method according to a third embodiment of the present invention.

A bush according to a first embodiment of the present invention will be described with reference to the drawings.

2 is a perspective view illustrating a bush according to a first embodiment of the present invention, and FIG. 3 is a perspective view of the bush according to the first embodiment of the present invention. Is a front view of a bush according to a first embodiment of the present invention.

Referring to FIGS. 1 to 3, the bush 100 according to the present embodiment includes an oil filter housing (not shown) for fixing the oil filter housing 2 provided in a vehicle to an engine block housing 2 inserted in the bush insertion hole 2a.

The bush 100 is similar in name to a bush used in a building, but the object to be used is not a wall but a plurality of bushes 100 are used in the oil filter housing 2 and the oil filter housing 2 is inserted therein.

The oil filter housing 2 is injection-molded through a separate working process from the bush 100 and the bush insertion hole 2a into which the bush 100 is inserted during injection molding is molded together. In this case, when the bolts B coupled to the bush 100 after being inserted into the bush insertion hole 2a are fixed to the engine block housing, the bush 100 may be mounted to the oil filter housing 2 Is completed.

The bush 100 may be molded together with the bush 100 in a manner different from the type in which the bush 100 is injection-molded through a separate working process with the bush 100. In this case, (2). In this case, since the oil filter housing 2 is formed in a state of being in close contact with the outside of the bush 100 at the same time as the injection of the injection material, the oil filter housing 2 is configured differently from the type in which only the oil filter housing 2 is molded.

The present embodiment is of a type in which the bush 100 is inserted after the oil filter housing 2 is first injection molded and two types in which the oil filter housing 2 and the bush 100 are molded together And a method of forming the bush 100 will be described below in order.

The bush 100 according to the present embodiment should be inserted into the bush insertion hole 2a formed in the oil filter housing 2 when the oil filter housing 2 is first injection molded.

The oil filter housing 2 is generally manufactured by an injection molding method, but may be manufactured by other molding methods. When the oil filter housing 2 is manufactured by the injection molding method, the tolerances of the bush insertion holes 2a may not be constant and may be different depending on the state of the injection molding during the molding or solidification during molding.

In this case, when the bush 100 is inserted into the bush insertion hole 2a, insertion may not be possible due to a tolerance error. For example, when the inner diameter of the bush insertion hole 2a is 10 mm and the outer diameter of the bush 100 is 11 mm, it is difficult to insert the bush insertion hole 2a into the bush insertion hole 2a or to insert the bush 100 in a forced insertion manner, There was a hassle that had to be reworked for the Bush.

In contrast, according to the present invention, when the cutout portion 106 formed in the axial direction of the bush body 102 is pressed in the circumferential direction, it can be closely contacted in the axial direction. In this case, the diameter can be reduced, As shown in Fig. A more detailed description thereof will be described later.

The cutout portion 106 refers to a state where mating surfaces 106 are spaced apart from each other by a predetermined distance with respect to the cutout portion 106 as viewed from the outside of the bush body 102. When an external force is applied in the radial direction The inner diameter can be changed.

The bushing 100 includes a bush body 102 formed in a cylindrical shape and a bushing 102 bending radially outward in the circumferential direction of the upper end of the bush body 102 and having an opening angle alpha between the opposing mating faces 104c and 104cc And a cutout 106 spaced apart from each other along the axial direction of the bush body 102 from the lower side of the flange 104. The flange 104 has a flange 104,

The bush body 102 is formed not in a solid shape filled with the inside but in a cylindrical shape and has an insertion hole 102a into which a bolt B is inserted when viewed from above.

The inner diameter of the bush body 102 may be kept constant along the axial direction in the flange 104, or the inner diameter may be decreased toward the lower side. However, when the bolt B is inserted into the upper end of the insertion hole 102a, the inner diameter of the lower portion becomes smaller.

For reference, the width of reduction of the inner diameter of the bush body 102 is not particularly limited numerically, but may be, for example, in units of mm. If the inner diameter is narrowed, it can be defined in terms of mm in terms of a numerical unit.

The flange 104 is radially outwardly bent in the upper circumferential direction of the bush body 102, and the thickness is configured to have a thickness similar to the thickness of the bush body 102.

The flange 104 includes a first round portion 104a formed along the inner circumferential direction while being bent radially outwardly from the bush body 102 and an outer circumferential portion 104a connecting the flange 104 and the bush body 102, And a second round portion 104b formed along the direction.

The first round portion 104a can prevent the bolt B from being caught when the bolt B enters the insertion hole 102a from the vertical upper side or the side surface so that the bolt B can be stably engaged.

In this case, when the operator inserts the bolt B after inserting the bush 100 into the oil filter housing 2, the working environment is always such that the bolt B is not inserted at the upper portion of the insertion hole 102a, May be inserted. In this case, the bolt B can be moved to the insertion hole 102a along the rounded inclined surface of the first round portion 104a, so that the insertion stability of the bolt B is improved.

Also, since the radius of the first round portion 104a is larger than that of the second round portion 104b, when the bolt B is inserted into the insertion hole 102a within a certain angle, it is easily inserted.

When the radius is formed in the state shown in the drawing, the first round portion 104a is formed so as to extend in the radial direction of the first round portion 104a even when it is inserted at the left or right side or the front or rear side with respect to the insertion hole 102a. The movement of the bolt B can be guided toward the insertion hole 102a in a state where the bolt B is in contact with the outer circumferential surface of the bush 100 and the insertion direction of the bolt B is easily matched with the insertion hole 102a formed in the bush 100 As shown in FIG.

For example, the first round portion 104a may be maintained at an angle of 45 degrees, and when the bolt B is inserted within the radius, the moving direction of the bolt B is always guided to the insertion hole 102a, There is no occurrence of a phenomenon in which the liquid is separated from the liquid. Therefore, the workability of the operator is improved and quick bolt (B) bonding can be achieved.

The second round portion 104b has a radius that is smaller than that of the first round portion 104a. For example, since the second round portion 104b is in contact with the bush body 102 at a right angle, the radius of the second round portion 104b is smaller than that of the first round portion 104a.

3 to 5, when the flange 104 according to the present embodiment is bent, opposed mating faces 104c and 104cc are formed, and the opening angle formed on the mating faces 104c and 104cc alpha], for example, one of the inclination angles of 45 degrees or more and 90 degrees or less can be maintained.

The opening angle? Affects a spacing of the first incision 106a, which will be described later, and the spacing distance of the first incision 106a is increased as the spreading angle? Is increased, the spacing distance of the first incision 106a is also reduced. For the sake of reference, the above-mentioned spaced distance means the interval of the first incision 106a to be described later.

The opening angle alpha is increased when the rate of change in diameter is to be kept large when the bush body 102 is inserted into the bush insertion hole 2a and conversely when the bush body 102 is inserted into the bush insertion hole 2a It is kept small when the rate of change in diameter may be small.

Therefore, in consideration of the inner diameter deviation of the bush insertion hole 2a formed in the oil filter housing 2, various changes can be made within any of the above-mentioned various angles or within the range of the above-mentioned opening angle. Therefore, the bush 100 can be inserted into the bush insertion hole 2a more easily and workability of the operator is improved.

When the bush 100 is inserted into the bush insertion hole 2a, the cut-off portion 106 extends from the flange 104 to the connecting portion of the bush body 102, And a second incision 106b extending from the first incision 106a to the lower end of the bush body 102 to a second length L2, do.

The first incision 106a is formed to correspond to various tolerances generated between the inner diameter of the bush insertion hole 2a and the outer diameter of the bush 100 when the bush 100 is inserted into the bush insertion hole 2a. 1 < / RTI > length L1.

The first length L1 may be reduced in diameter even when the bush 100 is inserted into the bush insertion hole 2a with a large tolerance, so that the inserting state is not caused due to the tolerance difference.

The second incision 106b may extend to a second length L2 that is longer than the first incision 106a and the axially spaced intervals may remain different or remain constant.

The diameter of the first incision 106a may be reduced when the incisions are maintained different from each other, and may be smaller than that of the first incision 106a when the incisions are different from each other. However, And can be finely reduced when the diameter of the portion 106a is reduced.

Since the spacing distance between the facing surfaces of the first incision portion 106a is greater than the spacing distance between the facing surfaces of the second incision portion 106b, it can be inserted more easily than when inserted into the bush insertion hole 2a have. The second slit 106b is spaced apart from the second slit 106b so that the second slit 106b is kept in a closely contacted state when viewed from the outside.

The first incision 106a may be formed in a cylindrical bush body (not shown) in a section extending from the second incision 106b to the lower end when the gap is reduced toward the second incision 106b 102) can be stably maintained.

The bush according to the present embodiment will be described in a case where the oil filter housing and the bush are molded at the same time, unlike the above-described embodiment.

Referring to FIGS. 1 and 6, in the present embodiment, when the oil filter housing 2 and the bush 100 are formed at the same time, (108) is formed.

The bush 100 is similar in name to a bush used in a building but the object to be used is not a wall but an oil filter housing 2 and a plurality of bushes 100 are inserted into the oil filter housing 2. For example, the oil filter housing 2 is described as being installed in a vehicle, but it can be applied to both moving means (motorcycle, cultivator, airplane, ship, train).

The bushing 100a is formed at a position where the bush body 102 and the flange 104 are formed and the engaging portion 108 is formed at a position where the cutout portion 106 is formed. More specifically, And the state of being engaged with each other along the direction is maintained.

In this case, since the injection liquid does not flow into the inside of the bush body 102 via the engaging portion 108, the molding of the oil filter housing 2 is not performed, The safety is improved and the defect rate due to defects is lowered.

The engaging portion 108 according to the present embodiment includes a first mating surface 108d and a second mating surface 108e formed at positions facing each other with respect to the axial direction of the bush body 102, A first engagement portion 108dd protruding from the first mating surface 108d toward the second mating surface 108e and a second engagement portion 108dd formed on the second mating surface 108e and inserted into the first engagement portion 108dd And a second engaging portion 108ee.

The first and second engaging portions 108dd and 108ee are formed in a triangular or polygonal shape. When the first and second engaging portions 108dd and 108ee are engaged with each other, So that a phenomenon of flowing into the insertion hole 102a does not occur.

The first and second engaging portions 108dd and 108ee may be formed in a polygonal shape for ease of manufacture, and may be formed in a rectangular shape in this case. This is because when the plate material to be used as the material of the bushing 100 is formed, the cutter is most likely to cut the first and second engaging portions 108dd and 108ee in a rectangular shape, .

Since the thickness of the first and second engaging portions 108dd and 108ee is the same as the thickness of the bush body 102, the first and second engaging portions 108dd and 108ee are not deformed by an external force when they are engaged with each other.

The first and second engaging portions 108dd and 108ee are formed in the number of three to four along the axial direction of the bush body 102 and may have the same dimensions or may have a smaller dimension toward the lower side in the axial direction have.

A bushing forming method according to a third embodiment of the present invention will be described with reference to the drawings.

7 to 9, in order to form the bush inserted into the oil filter housing, the raw material wound in the form of a coil is cut into a plate-shaped bush body having a predetermined length, A second molding step (ST200) of forming a flange by vertically bending one end of the cut bush body, and a second molding step (ST200) in which the bent bush body is placed in the bush die A third molding step (ST300) of forming a cylindrical shape after being moved by the pusher, and a discharging step (ST400) of discharging the bush formed in a cylindrical shape to the outside of the bush metal mold.

The bush body is moved to a place where molding is to be carried out through a forklift or a crane while the raw material is wound in a coil form. After the coil is mounted on the winding machine, one end portion is moved by a required length by a roller and cut by a cutter (ST100).

Since the bush body forms a plate-like raw material into a cylindrical shape, the portion to be formed into a flange is vertically bent by a bending machine (ST200). The bent flange is formed so that the round in the inner circumferential direction is formed larger than the round in the outer circumferential direction so that it can be inserted more easily when the bolt B is inserted.

As shown in FIG. 9A, in order to form the bush body 102 into a cylindrical shape, the bush body 102 is placed in the upper part of the bushing mold frame 30, The first shaping tool 11 is lowered to form a part of the upper surface and the side surface of the bush body 102 (ST310).

Particularly, the present invention is a method in which the bush body 102 is press-formed by a forming tool after being cut, and a plurality of bushes can be formed through a molding machine provided with a plurality of forming tools, thereby significantly speeding up the operation.

Both the first shaping tool 11 and the third shaping tool 13 to be described later are formed by the bush molding machine 10 and the first shaping tool 11 is formed in a horizontal shape not in a circular shape in cross section, And the end portion is bent downward.

The first shaping tool 11 may be configured such that the bush body 102 is not formed in a circular shape at one time and that the first shaping tool 11 is opened in the clockwise direction with respect to the lower side of the bush body 102 between 4 o'clock and 8 o'clock . The reason for molding in this way is to mold the overall shape of the bush body 102 first, and to shape the bush with an accurate cylindrical shape through additional molding, rather than molding the final shape of the bush with a single molding.

In this case, the accuracy and safety of the molding are improved, the dimensional accuracy is improved, and the defective rate can be reduced, thereby minimizing the workload of the operator.

As shown in Figs. 9 (b) to 9 (c), the second molding tool 12 is positioned at a position where the upper surface of the bush body 102 is rounded after the molding by the above- And temporarily fixed to the outside of the bush body 102 is temporarily maintained (ST320).

The second shaping tool 12 is temporarily fixed to the bush body 102 by moving toward the bush body 102 at the left and right positions when viewed from the front based on the state in which the bush body 102 is seated on the bushing mold .

In this case, since the side surfaces of the bush body 102 are not fixed to the left and right upper surfaces, the open shape between 4 o'clock and 8 o'clock is maintained.

The third processing tool 13 simultaneously moves toward the lower side of both the left and right sides of the bush body 102 at left and right side positions with respect to the front face of the bush body 102, The lower surface of the bush body 102 is formed into a cylindrical shape in the axial direction by pressing the mold frame 30 (ST330).

When molding is performed in this manner, the incision part can be easily molded, and the safety of molding is improved.

9 (d), after the bush body 102 is formed into a cylindrical shape, the temporary fixing of the bush body 102 to the bush body 102 is released and the pusher (not shown) 41 (ST340).

Since the bush body 102 is continuously formed at a high speed in the above-described manner, it is possible to perform thousands of bushings per unit time, thereby improving work speed and workability at the same time.

When the lower surface of the bush body 102 according to the present embodiment is formed into a cylindrical shape in the axial direction (ST300), a mating surface facing each other in a predetermined section along the axial direction of the bush body 102 from the flange The spaced apart state is maintained and thereafter the state of close contact with each other is maintained.

Accordingly, when the bush is inserted into the bush insertion hole 2a formed in the oil filter housing 2, even if the bush insertion hole 2a has a small diameter, surface contact can be easily performed. In some cases, The tolerance due to the difference between the bush insertion hole and the outer diameter of the bushing can be stably controlled. In this case, the tolerance error can be adjusted by the above-mentioned close contact of the cut-out portion.

9 (e) to 9 (f), the third molding step ST300 according to the present embodiment is performed after the bush body 102 is formed into a cylindrical shape, A predetermined pressure is further applied in the axial direction so that the spaced distance between opposed mating surfaces or the spaced distance in the axial direction is constantly adjusted (ST350).

The bush body 102 may have a cylindrical portion formed in the axial direction and may have an error. For example, an axial gap between the cut-away portion 106 and the flange 104 The length may vary by reference.

In this case, it is necessary to keep the axial length and spacing of the bush body 102 constant, thereby minimizing product defects due to tolerance errors. The present invention can be applied to a bush body 102 at any position either above or below the bush body 102 The tolerance error can be stably adjusted by applying the additional pressure.

In this case, the piston 42 moves in the direction of the arrow with the side surface of the bush body 102 being supported by the support body 43, so that the bush body 102 is pressed in the axial direction with respect to the bush body 102 ).

Therefore, the bush body 102 can maintain the tolerance partially generated from the upper side or the lower side in the axial direction and can minimize the defective product or the deviation in the axial direction due to the tolerance error while molding a plurality of bushes.

The bush formed in the cylindrical shape is discharged to the outside (ST400), and after the surface treatment process, the operation is completed.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit of the invention as set forth in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

2: Oil filter housing
2a: Bush insertion hole
100: Bush
102: Bush body
102a: insertion hole
104: Flange
104c, 104cc:
104a: first round section
104b: second round section
α: Opening angle
106: incision
106a: first incision section
106b: second incision section
108:
108dd, 108ee: 1st and 2nd engaging portions

Claims (17)

Bush body;
A flange bending radially outward from an upper circumferential direction of the bush body and having an opening angle between opposing mating surfaces in the bending state; And
And a cutout spaced apart from each other along an axial direction of the bush body from below the flange. The method according to claim 1,
Wherein the bush body has an inner diameter that decreases in a direction axially downward from the flange. The method according to claim 1,
The flange having a first round formed along the inner circumferential direction while being bent radially outwardly from the bush body;
And a second round portion formed along an outer circumferential direction to which the flange and the bush body are connected. The method of claim 3,
Wherein the first round portion has a larger radius of the rounded portion than the second round portion. The method according to claim 1,
Wherein the opening angle is maintained at any one of an inclination angle of 45 degrees or more and 90 degrees or less. The method according to claim 1,
The incision including a first incision extending from the flange to a first length (L1) along an axial direction of the bush body;
And a second incision extending from the first incision to a lower end of the bush body to a second length (L2). The method according to claim 1,
Wherein the first incision portion and the second incision portion have different intervals in the circumferential direction of the bush body. 8. The method of claim 7,
Wherein the first incision portion has a reduced incision interval toward the second incision portion. Bush body;
A flange bending radially outward from an upper circumferential direction of the bush body and having an opening angle between opposing mating surfaces in the bending state; And
Wherein a bite portion is formed to be engaged with each other along the axial direction of the bush body from the lower side of the flange. 10. The method of claim 9,
Wherein the engaging portion includes a first mating surface and a second mating surface formed at positions facing each other with respect to an axial direction of the bush body,
A first engaging portion protruding from the first mating surface toward the second mating surface; and a second engaging portion formed on the second mating surface and into which the first engaging portion is inserted. 11. The method of claim 10,
Wherein the first engaging portion and the second engaging portion are formed in any one of a triangular shape or a polygonal shape. An oil filter housing with a bush inserted therein according to any one of the preceding claims. A first shaping step of cutting a raw material wound in a coil shape into a plate-shaped bush body having a predetermined length to form a bush inserted into an oil filter housing installed in a vehicle;
A second forming step of bending one end of the cut bush body vertically to form a flange;
A third shaping step of forming the bent bush body into a cylindrical shape after being moved by the pusher in a state where the bush body is located in the bushing mold; And
And a discharge step of discharging the bush formed in a cylindrical shape to the outside of the bush metal mold. 14. The method of claim 13,
Wherein the second shaping step comprises forming a round in the inner circumferential direction of the bent flange larger than a round in the outer circumferential direction. 14. The method of claim 13,
The third forming step may include a step of lowering the first shaping tool at the upper portion of the bushing mold so that the upper surface and the side surface of the bushing body are partly rounded.
The second shaping tool is moved toward the end side surface of the bush body after the partial rounding of the bush body to fix the bush body, thereby temporarily fixing the bush body;
The third shaping tool simultaneously moves toward both the left and right sides of the bush body at the left and right side positions with respect to the front surface of the bush body and then presses the bush body against the bushing mold frame so that the bottom surface of the bushing body is moved in the axial direction Molding in a cylindrical shape;
The temporary fixation of the bush body is released. 16. The method of claim 15,
Wherein the step of forming the bottom surface of the bush body in a cylindrical shape in the axial direction includes maintaining a state in which a mating surface facing each other is spaced apart from the flange in a predetermined section along the axial direction of the bush body, And the state of the bush is maintained. 14. The method of claim 13,
The third forming step may include the step of uniformly applying a predetermined pressure in the axial direction of the bush body after the bush body is formed into a cylindrical shape so that the spaced distance between opposing facing surfaces is constantly adjusted Molding method of bush.

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