KR102429487B1 - Processing apparatus for cylinder bore - Google Patents

Abstract

The present invention relates to a cylinder bore processing apparatus, comprising: a fixing block having at least one seating groove and being inserted into the cylinder bore; an actuator capable of rotating the fixed block around a rotating shaft or reciprocating along the axial direction of the rotating shaft; a centering unit seated in the seating groove, at least a portion of which is provided so as to be in elastic contact with the inner wall surface of the cylinder bore, and is capable of aligning the fixing block so that the rotation axis and the central axis of the cylinder bore coincide; and a cutting member fixed to the centering unit so as to be in elastic contact with the inner surface of the cylinder bore and capable of forming an oil pocket by cutting the inner surface of the cylinder bore.

Description

Cylinder bore processing equipment {PROCESSING APPARATUS FOR CYLINDER BORE}

The present invention relates to a cylinder bore machining apparatus.

As the global automobile market continues to develop new engines to satisfy the tightened domestic and foreign laws and fuel economy regulations, it is required to secure unique technologies to respond to them.

The parts where ignition is first made and friction occurs inside the engine are the cylinder bore and the piston. Since the piston ring attached to the piston moves up and down while in contact with the inner surface of the cylinder bore, shear resistance acts between the piston ring and the inner surface of the cylinder bore. Such shear resistance causes friction loss, and thus causes a problem of lowering fuel efficiency. Therefore, it is necessary to secure a technique for reducing the shear resistance by reducing the contact area between the piston ring and the inner surface of the cylinder bore.

1 is a view showing a state in which an oil pocket is formed on the inner surface of a cylinder bore using a conventional cylinder bore processing apparatus, and FIG. 2 is a partial cross-sectional view of the cylinder bore shown in FIG.

Conventionally, as shown in FIGS. 1 and 2, the oil pockets 220 in the form of grooves are intermittently formed on the inner surface 210 of the cylinder bore 200 using a cylinder bore processing apparatus composed of a laser device or a knurling machine. By forming, a technology has been developed to reduce the contact area between the piston ring 310 and the inner surface 210 of the cylinder bore 200 .

However, when the oil pocket 220 is formed using a laser device or a knurling machine, it takes a long time to form the oil pocket 220 , and thus there is a problem in that productivity is reduced. In addition, when the oil pocket 220 is formed by using a laser device, there is a problem in that economical efficiency is lowered due to a large cost to install the laser device, and there are problems in that it is difficult to manage the laser device.

The present invention is to solve the problems of the prior art, and an object of the present invention is to provide a cylinder bore processing apparatus with an improved structure so as to shorten the formation time of the oil pocket.

Furthermore, an object of the present invention is to provide an apparatus for processing a cylinder bore having an improved structure so as to reduce the cost of forming an oil pocket.

Furthermore, an object of the present invention is to provide an apparatus for processing a cylinder bore whose structure is improved to facilitate management.

Cylinder bore processing apparatus according to a preferred embodiment of the present invention for solving the above problems, at least one seating groove is provided, the fixing block is provided to be inserted into the cylinder bore; an actuator capable of rotating the fixed block around a rotating shaft or reciprocating along the axial direction of the rotating shaft; a centering unit seated in the seating groove, at least a portion of which is provided so as to be in elastic contact with the inner wall surface of the cylinder bore, and is capable of aligning the fixing block so that the rotation axis and the central axis of the cylinder bore coincide; and a cutting member fixed to the centering unit so as to be in elastic contact with the inner surface of the cylinder bore and capable of forming an oil pocket by cutting the inner surface of the cylinder bore.

Preferably, the actuator rotates and drives the fixing member in one predetermined direction so that a spiral oil pocket is continuously formed on the inner surface of the cylinder bore by the cutting member and simultaneously feeds in the axial direction.

Preferably, the centering unit includes an alignment block that is movably seated in the seating groove in a horizontal direction perpendicular to the axial direction, and at least a portion of the alignment block is in elastic contact with the inner surface of the cylinder bore. and an elastic member for elastically pressing the block toward the outside of the fixed block.

Preferably, the seating groove includes a first seating groove provided on one side of the fixing block and a second seating groove provided on the other side of the fixing block, and the alignment block is disposed in the first seating groove. A first alignment block that is movably seated in the horizontal direction, and a second alignment block that is movably seated in the second seating groove in the horizontal direction.

Preferably, the elastic member is interposed between the first alignment block and the second alignment block to elastically press the first alignment block and the second alignment block toward the outside of the fixing block, respectively.

Preferably, the fixing block further includes an insertion hole for communicating the first seating groove and the second seating groove, and the elastic member is inserted into the insertion hole.

Preferably, each of the first alignment block and the second alignment block includes at least one elastic pad provided to be in elastic contact with the inner surface of the cylinder bore by the elastic member.

Preferably, any one of the first alignment block and the second alignment block includes a fixing groove to which the cutting member is fixed, and the actuator moves the fixing block to a predetermined one so that the cutting member forms the oil pocket. rotation along the direction.

Preferably, the centering unit further includes a rolling prevention member coupled to the alignment block to limit the rolling of the alignment block, and the anti-rolling member is a member of the elastic member so as to be elastically pressed in an outward direction of the fixing block. A second accommodating cap that accommodates a certain portion and is coupled to the first alignment block, receives another portion of the elastic member so as to be elastically pressed outward of the fixing block, and is coupled to the second alignment block A receiving cap is provided.

Preferably, the first accommodating cap and the second accommodating cap are installed by being inserted into the insertion hole while accommodating the elastic member, respectively.

Preferably, the first accommodating cap and the second accommodating cap further include a hydraulic pump capable of filling the insertion hole with a pressurizable working fluid in the inner direction of the fixing block or discharging from the insertion hole, respectively.

Preferably, the hydraulic pump controls the hydraulic pressure of the working fluid to be smaller than the elastic pressure of the elastic member, and transfers the first accommodation cap and the second accommodation cap to the outside of the fixing block, and the hydraulic pressure The pump controls the hydraulic pressure of the working fluid to be greater than the elastic pressure of the elastic member, and transfers the first accommodating cap and the second accommodating cap in an inner direction of the fixing block.

Preferably, the fixing block further includes at least one filling hole for connecting the insertion hole and the hydraulic pump.

Preferably, the first alignment block and the first accommodation cap are arranged such that a portion overlaps each other in the axial direction, and the anti-rolling member penetrates the overlapping portion in the axial direction to align the first alignment block. A first pin for coupling the block and the first accommodation cap is further provided.

Preferably, the first alignment block includes a first insertion groove formed on one surface to insert the end of the first accommodation cap, and a first pinhole drilled in the axial direction to communicate with the first insertion groove, , The first accommodation cap has a second pinhole punched at an end inserted into the first insertion groove to communicate with the first pinhole, and the first pin is inserted into the first pinhole and the second pinhole. is installed

Preferably, the cylinder unit further includes a first support member interposed between the first alignment block and the insertion hole to support the first accommodation cap.

Preferably, the first support member includes a first support hole into which the first accommodating cap is inserted, and a third pin hole into which the first pin is inserted, and the seating groove includes the first support member to be seated. A third seating groove provided between the first insertion hole and the first seating groove is further provided so as to be possible.

Preferably, the second alignment block and the second accommodating cap are arranged so that a part overlaps each other in a horizontal direction perpendicular to the axial direction, and the anti-rolling member rotates the overlapping part in the horizontal direction. It further includes a second pin through which the second alignment block and the second accommodation cap are coupled.

Preferably, the second accommodating cap has a second insertion groove formed at an end so that any part of the second alignment block is inserted, and a fourth pinhole drilled in the horizontal direction to communicate with the second insertion groove, , The second alignment block has a fifth pinhole punched in a portion to communicate with the fourth pinhole, and the second pin is installed by being inserted into the fourth pinhole and the fifth pinhole.

Preferably, the cylinder unit further includes a second support member interposed between the second alignment block and the insertion hole to support the second accommodation cap, and the second support member includes the second accommodation cap. The second support hole is inserted, and a third insertion groove into which another portion of the second alignment block is inserted.

The cylinder bore processing apparatus according to the present invention has the following effects.

First, in the present invention, since the oil pocket can be continuously formed without a broken section, it is possible to improve productivity by reducing the formation time of the oil pocket compared to the case where the oil pocket is formed intermittently, and by increasing the area ratio of the oil pocket to the piston ring It is possible to improve the fuel efficiency of the vehicle by reducing the shear resistance acting between the and the inner surface of the cylinder bore.

Second, according to the present invention, it is possible to improve economic efficiency by forming an oil pocket using a cutting member, which is easier to install and manage compared to a laser device.

1 is a view showing a state in which an oil pocket is formed on the inner surface of a cylinder bore using a conventional cylinder bore processing apparatus.
Fig. 2 is a partial cross-sectional view of the cylinder bore shown in Fig. 1;
3 is a perspective view of a cylinder bore machining apparatus according to a preferred embodiment of the present invention;
Figure 4 is an exploded perspective view of the cylinder bore processing apparatus shown in Figure 1;
5 is a view showing a state in which an oil pocket is formed on the inner surface of the cylinder bore using the cylinder bore processing apparatus shown in FIG. 1;

The terms or words used in the present specification and claims are not to be construed as being limited to their ordinary or dictionary meanings, and the inventor may properly define the concept of the term in order to best describe his invention. Based on the principle that there is, it should be interpreted as meaning and concept consistent with the technical idea of the present invention. Accordingly, the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical spirit of the present invention, so at the time of the present application, various It should be understood that there may be equivalents and variations.

In the drawings, the size of each component or a specific part constituting the component is exaggerated, omitted, or schematically illustrated for convenience and clarity of description. Therefore, the size of each component does not fully reflect the actual size. If it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, such description will be omitted.

3 is an exploded perspective view of the cylinder bore processing apparatus shown in FIG. 1, and FIG. 4 is a perspective view of the cylinder bore processing apparatus according to a preferred embodiment of the present invention.

3 and 4, the cylinder bore machining apparatus 1 according to a preferred embodiment of the present invention is a fixed block 10, an actuator 20, a centering unit 30, and a cutting member 40 ), a hydraulic pump 50, and the like.

First, the fixing block 10 is provided so that the centering unit 30 and the cutting member 40 can be fixedly installed at a predetermined position. The fixing block 10 has a cylindrical shape having a small diameter compared to the inner diameter of the cylinder bore 200 so as to be inserted into the cylinder bore 200, as shown in FIG. The fixed block 10 may have a lower end mounted on the actuator 20 so as to be rotationally driven and translated by the actuator 20 as shown in FIG. 4 . As shown in FIG. 4 , the fixing block 10 may include seating grooves 11 , 12 , 13 , an insertion hole 14 , a charging hole 15 , and the like.

The seating grooves 11 , 12 , and 13 are provided so that the alignment blocks 60 and 70 and the support members 100 and 110 to be described later can be seated therein. For example, the seating grooves 11 , 12 , 13 include a first seating groove 11 , a second seating groove 12 , and a third seating groove 13 , as shown in FIG. 4 . can be provided

The first seating groove 11 is formed on one side of the fixing block 10 , as shown in FIG. 4 . As shown in FIG. 4 , the second seating groove 12 is formed on the other side of the fixing block 10 opposite to one side of the fixing block 10 . The second seating groove 12 is preferably provided to have a relatively narrower volume than the first seating groove 11, but is not limited thereto. The third seating groove 13 is formed between the first seating groove 11 and the insertion hole 14 as shown in FIG. 4 . The third seating groove 13 is preferably provided to have a relatively narrower volume than the first seating groove 11, but is not limited thereto.

The insertion hole 14 is drilled so as to communicate the first seating groove 11 and the second seating groove 12 with the third seating groove 13 as shown in FIG. 4 . The insertion hole 14 is, as shown in FIG. 4 , a first opening 16 that is opened toward the first alignment block 60 , and a second opening that is opened toward the second alignment block 70 . (not shown) may be provided.

The charging hole 15 is formed to communicate the insertion hole 14 and the guide hole 22 of the actuator 20 to be described later, as shown in FIG. 4 . The filling hole 15 may include a first filling hole 15 formed to be adjacent to the first opening 16 and a second filling hole (not shown) formed to be adjacent to the second opening. The first filling hole 15 and the second filling hole respectively fill the insertion hole 14 with a working fluid (not shown) guided by the guide hole 22 or fill the insertion hole 14 with the working fluid filled in the insertion hole 14 . It can be discharged through the guide hole 22 .

Next, the actuator 20 rotationally drives the fixed block 10 and the centering unit 30 and the cutting member 40 fixed to the fixed block 10 about the axis of rotation or translational driving along the axial direction of the axis of rotation. arranged to do The actuator 20 is preferably coupled to the lower end of the fixing block 10, as shown in FIG. 4, but is not limited thereto.

This actuator 20 has a guide hole 22 formed therein, as shown in FIG. 4 . The guide hole 22 guides the working fluid pumped by the hydraulic pump 50 to the charging hole 15 of the fixed block 10 or directs the working fluid discharged from the charging hole 15 to the hydraulic pump 50 . can guide you

Next, the centering unit 30 is provided so that the rotation axis of the actuator 20 and the central axis of the cylinder bore 200 coincide with the fixing block 10 and the cutting member 40 to be aligned. For example, the centering unit 30 is, as shown in FIG. 4 , the alignment blocks 60 and 70 , the elastic member 80 , the anti-rolling member 90 , and the support members 100 and 110 . etc. can be provided.

The alignment blocks 60 and 70 may include a first alignment block 60 and a second alignment block 70 as shown in FIG. 4 .

As shown in FIGS. 3 and 4 , the first alignment block 60 has a shape corresponding to the first seating groove 11 , and has a horizontal direction perpendicular to the axial direction in the first seating groove 11 . is movably mounted to The first alignment block 60, as shown in FIG. 4, elastic pads 61 and 63, a fixing groove 65, a first insertion groove (not shown), a mounting groove 67, and, A first pinhole 69 may be provided.

The elastic pads 61 and 63 are mounted on the outer surface of the first alignment block 60 so as to be in elastic contact with the inner surface 210 of the cylinder bore 200 as shown in FIG. 3 . The elastic pads 61 and 63 are formed of an elastic material that is elastically deformable. The number of the elastic pads 61 and 63 to be installed is not particularly limited. For example, as shown in FIG. 3 , a total of two elastic pads 61 , 63 may be installed in the first support block, one at both ends of the first alignment block 60 . These elastic pads 61 and 63 are in elastic contact with the inner surface 210 of the cylinder bore 200 by the elastic pressing force applied from the elastic member 80 to be described later to elastically support the first alignment block 60 . have.

The fixing groove 65 is formed on the outer surface of the first alignment block 60 to be located in a section between the elastic pads 61 and 63, as shown in FIG. 4, and the cutting member 40 is fixed The first insertion groove (not shown) is formed on the inner surface of the first alignment block 60 so that the end of the first accommodation cap 92 to be described later can be inserted.

The mounting groove 67 is formed on the upper surface of the first alignment block 60 so that the upper plate 104 of the first support member 100 to be described later can be mounted thereon, as shown in FIG. 4 .

The first pinhole 69 is formed to pass through the first alignment block 60 in the axial direction and communicate with the first insertion groove. The first pinhole 69 has a diameter corresponding to that of the first pin 94 so that the first pin 94 of the anti-rolling member 90 to be described later can be inserted.

The second alignment block 70 is, as shown in FIGS. 3 and 4 , a second insertion groove 96e of a second accommodation cap 96 to be described later and a third of the second support member 110 to be described later. It has a shape corresponding to the insertion groove (114). At least a portion of the second alignment block 70 is horizontally movably seated in the second seating groove 12 in a state in which at least a portion is inserted into the second insertion groove 96e and the third insertion groove 114 . The second alignment block 70 may include an elastic pad 72 , a fifth pinhole 74 , and the like.

The elastic pad 72 is mounted on the outer surface of the second alignment block 70 so as to be in elastic contact with the inner surface 210 of the cylinder bore 200, as shown in FIG. The elastic pad 72 is formed of an elastic material that is elastically deformable. The number of the elastic pads 72 to be installed is not particularly limited. For example, as shown in FIG. 4 , one elastic pad 72 may be installed in the second alignment block 70 . The elastic pad 72 may be in elastic contact with the inner surface 210 of the cylinder bore 200 by an elastic pressing force applied from the elastic member 80 to be described later to elastically support the second alignment block 70 .

As shown in FIG. 4 , the fifth pinhole 74 penetrates the second alignment block 70 in a horizontal direction perpendicular to the axial direction and at the same time, a fourth pinhole of the second accommodation cap 96 to be described later. It is formed to communicate with (96f). The fifth pinhole 74 has a diameter corresponding to that of the second pin 98 so that a second pin 98, which will be described later, can be inserted.

The elastic member 80 is provided to elastically press the alignment blocks 60 and 70 toward the inner surface 210 of the cylinder bore 200 . The type of the elastic member 80 usable as the elastic member 80 is not particularly limited. For example, the elastic member 80 may be configured as a compression coil spring, as shown in FIG. 4 .

The elastic member 80, as shown in FIG. 4, in a state accommodated in the first accommodation cap 92 and the second accommodation cap 96, the first alignment block 60 and the second alignment block 70 ) may be inserted into the insertion hole 14 to be interposed between them. This elastic member 80, the first accommodating cap 92 and the second accommodating cap 96 via the first alignment block 60 and the second aligning block 70, respectively, the inside of the cylinder bore (200) By elastically pressing toward the side surface 210 , the elastic pads 61 , 63 , and 72 may be in elastic contact with the inner surface 210 of the cylinder bore 200 by a predetermined pressure, respectively. Through this, the elastic member 80 centers the fixing block 10 so that the rotation axis of the actuator 20 and the central axis of the cylinder bore 200 coincide with each other, and the cutting member mounted on the first alignment block 60 ( 40) to the inner surface 210 of the cylinder bore 200 with a constant pressure to elastically contact the depth of the oil pocket 230 can be maintained constant.

Next, the anti-rolling member 90 is provided to prevent the alignment blocks 60 and 70 from rolling. The anti-rolling member 90, as shown in FIG. 4, includes a first accommodating cap 92, a first pin 94, a second accommodating cap 96, a second pin 98, and the like. can be provided

The first accommodating cap 92 is provided to accommodate any part of the elastic member 80 as shown in FIG. 4 . The first accommodation cap 92 has one end 92a facing toward the first alignment block 60 of the first supporting hole 106 and the first alignment block 60 of the first supporting member 100 to be described later. They are sequentially inserted into the first insertion groove. Then, the one end portion 92a is disposed overlapping the first alignment block 60 in the axial direction.

The first accommodation cap 92 is. A first accommodating groove (not shown) formed to accommodate any part of the elastic member 80, and a first flange 92c formed along the circumference of the first accommodating cap 92 at the other end 92b; , A second pinhole 92d that is perforated to communicate with the first pinhole 69 of the first alignment block 60 at one end 92a, and a step 92e provided between the one end 92a and the middle portion etc. can be provided.

The first accommodating groove is formed to open in the inner direction of the fixing block 10 , and accommodates any part of the elastic member 80 . The first flange 92c is formed around the other end 92b so as to protrude to the outside of the first accommodation cap 92 , and has a diameter corresponding to the insertion hole 14 . The second pinhole 92d has a diameter corresponding to that of the first pin 94 so that the first pin 94 can be inserted thereinto. The step 92e may be formed by providing the first accommodating cap 92 so that one end 92a has a thinner thickness than the middle portion.

The first accommodating cap 92 is movably inserted into the insertion hole 14 in a state where a portion of the elastic member 80 is accommodated in the first accommodating groove in a horizontal direction. The first accommodating cap 92 is pressed outwardly of the fixing block 10 by the elastic pressure of the elastic member 80 applied through the first accommodating groove, and is applied through the first flange 92c. It is pressed in the inner direction of the fixing block 10 by the hydraulic pressure of the fluid. Accordingly, the first accommodating cap 92 may be transferred in the outer direction of the fixed block 10 by elastic pressure or may be transferred in the inner direction of the fixed block 10 by hydraulic pressure. Further details of the reciprocating transport of the first accommodation cap 92 will be described later.

The first pin 94 is, as shown in FIGS. 3 and 4 , a third pinhole 108 of the first support member 100 , which will be described later, and a first pinhole 69 of the first alignment block 60 . and sequentially inserted into the second pinhole 92d of the first accommodating cap 92 and installed. These first pins 94, while fastening the first alignment block 60, the first accommodation cap 92, and the first support member 100, the first alignment block 60 is rolled in the horizontal direction can be prevented from becoming

The second accommodating cap 96 is provided to accommodate the other portion of the elastic member 80 as shown in FIG. 4 . The second accommodation cap 96 has one end 96a facing toward the second alignment block 70 is inserted into the second support hole 112 of the second support member 110 to be described later.

The second accommodating cap 96 is formed along the circumference of the second accommodating cap 96 at the second accommodating groove 96c formed to accommodate the other portion of the elastic member 80 and the other end 96b. A second flange (96d) to be formed, a second insertion groove (96e) formed so that any part of the second alignment block (70) is inserted into one end (96a), and a second insertion groove (96a) at one end (96a) 96e) and the like may be provided with a fourth pinhole (96f) drilled in the horizontal direction to communicate with the.

The second accommodating groove 96c is formed to open in the inner direction of the fixing block 10 and accommodates another portion of the elastic member 80 . The second flange 96d is formed around the other end 96b so as to protrude to the outside of the second accommodation cap 96 , and has a diameter corresponding to the insertion hole 14 . The second insertion groove 96e, as shown in FIG. 4, is preferably formed so that the central portion of the second alignment block 70 can be inserted, but is not limited thereto. The fourth pinhole 96f has a shape corresponding to the second pin 98 so that the second pin 98 can be inserted.

The second accommodating cap 96 is movably inserted into the insertion hole 14 in the horizontal direction while the other portion of the elastic member 80 is accommodated in the second accommodating groove 96c. The second accommodating cap 96 is pressed outwardly of the fixing block 10 by the elastic pressure of the elastic member 80 applied through the second accommodating groove 96c, and through the second flange 96d. It is pressed in the inner direction of the fixing block 10 by the hydraulic pressure of the applied working fluid. Accordingly, the second accommodating cap 96 may be transferred in the outer direction of the fixed block 10 by elastic pressure or may be transferred in the inner direction of the fixed block 10 by hydraulic pressure. Further details of the reciprocating transport of the second accommodation cap 96 will be described later.

The second pin 98 is sequentially in the fourth pinhole 96f of the second accommodation cap 96 and the fifth pinhole 74 of the second alignment block 70, as shown in FIGS. 3 and 4 . inserted and installed. The second pin 98 may prevent the second alignment block 70 from rolling in the vertical direction.

Next, the support members 100 and 110 are provided to support the accommodation caps 92 and 96 . The support members 100 and 110 may include a first support member 100 capable of supporting the first accommodation cap 92 , and a second support member 110 capable of supporting the second accommodation cap 96 , etc. have.

As shown in FIGS. 3 and 4 , the first support member 100 is seated in the third seating groove 13 to be interposed between the insertion hole 14 and the first alignment block 60 . The first support member 100 may include a side plate 102 that is seated in the third seating groove 13 , and an upper plate 104 that is seated in the mounting groove 67 of the first alignment block 60 , etc. have. That is, the first support member 100 may have a 'L' shape composed of the side plate 102 and the top plate 104 .

The side plate 102 may be provided to communicate with the insertion hole 14 and include a first support hole 106 into which one end 92a of the first accommodation cap 92 is inserted. The first support hole 106 is formed to be stepped so that the step 92e of the first accommodation cap 92 can be caught, as shown in FIG. 4 .

The upper plate 104 may include a third pinhole 108 that is perforated to communicate with the first pinhole 69 of the first alignment block 60 . The third pinhole 108 has a diameter corresponding to the first pin 94 so that the first pin 94 can be inserted.

One end of the first support member 100 may support the first accommodation cap 92 inserted into the first support hole 106 so as not to flow in the axial direction or the horizontal direction.

As shown in FIG. 4 , the second support member 110 is seated in the second seating groove 12 . The second support member 110 includes a second support hole 112 into which the other end 96b of the second accommodation cap 96 is inserted so as to communicate with the insertion hole 14 , and the second accommodation cap 96 . A third insertion groove 114 in communication with the second insertion groove 96e and into which another portion of the second alignment block 70 is inserted may be provided. The third insertion groove 114 is the remaining portion except for the middle portion of the second alignment block 70 inserted into the second insertion groove 96e of the second accommodation cap 96 , that is, the second alignment block 70 . The upper and lower portions are formed to be inserted respectively.

One end of the second support member 110 may support the second accommodation cap 96 inserted into the second support hole 112 so as not to flow in the axial direction or the horizontal direction.

Next, the cutting member 40 is fixed to the fixing groove 65 of the first alignment block 60 so as to be in elastic contact with the inner surface 210 of the cylinder bore 200 by the elastic member 80 at a predetermined pressure. do. The cutting member 40 is formed of a material capable of cutting the inner surface 210 of the cylinder bore 200 . This cutting member 40, when the fixed block 10 is rotationally driven and translationally driven by the actuator 20, is rotationally driven and translated along the stationary block 10 while rotating the inner surface of the cylinder bore 200 ( The oil pocket 230 may be formed by cutting 210 .

Next, the hydraulic pump 50 is installed on one side of the actuator 20 so as to be connected to the guide hole 22 of the actuator 20 , as shown in FIG. 3 . The hydraulic pump 50 may pump the working fluid to fill the guide hole 22 or discharge it from the guide hole 22 .

As described above, the guide hole 22 communicates with the insertion hole 14 by the first filling hole 15 and the second filling hole. Accordingly, the working fluid introduced into the guide hole 22 by the hydraulic pump 50 is filled in the insertion hole 14 by the first filling hole 15 and the second filling hole. The working fluid filled in the insertion hole 14 presses the accommodation caps 92 and 96 in the inner direction of the fixing block 10 . When the hydraulic pressure of the working fluid is greater than the elastic pressure of the elastic member 80 , , accommodating caps (92, 96) are transported in the inner direction of the fixing block 10 by the hydraulic pressure of the working fluid, the accommodating caps (92, 96) and the fastened alignment blocks (60, 70) and the support member ( 100 and 110 are transferred inwardly of the fixing block 10 by the accommodation caps 92 and 96 . Then, the elastic member 80 is compressed and contracted by the accommodation caps 92 and 96 , and the elastic pads 61 , 63 , 72 are spaced apart from the inner surface 210 of the cylinder bore 200 .

When the hydraulic pressure of the working fluid is smaller than the elastic pressure of the elastic member 80 , the accommodation caps 92 and 96 are transferred to the outside of the fixing block 10 by the elastic pressure of the elastic member 80 , and receive The alignment blocks 60 and 70 coupled with the caps 92 and 96 and the support members 100 and 110 are transferred to the outside of the fixing block 10 by the accommodation caps 92 and 96 . Then, the elastic member 80 is extended by releasing the pressure by the receiving caps 92 and 96 , and the elastic pads 61 , 63 , 72 are close to the inner surface 210 of the cylinder bore 200 .

5 is a view showing a state in which an oil pocket is formed on the inner surface of the cylinder bore using the cylinder bore processing apparatus shown in FIG. 1 .

Hereinafter, a method of forming the oil pocket 230 on the inner surface 210 of the cylinder bore 200 using the cylinder bore processing apparatus 1 will be described.

First, by filling the working fluid in the insertion hole 14 to increase the hydraulic pressure of the working fluid, the alignment blocks 60 and 70 are transferred in the inner direction of the fixing block 10 .

Next, the fixing block 10 is inserted into the inner surface 210 of the cylinder bore 200 and disposed at a predetermined machining start position. At this time, since the alignment blocks 60 and 70 are transported in the inner direction of the fixing block 10 , the elastic pads 61 , 63 , 72 and the cutting member 40 are connected to the inner surface of the cylinder bore 200 and spaced apart by a predetermined interval.

Thereafter, by discharging the working fluid from the insertion hole 14 to reduce the hydraulic pressure of the working fluid, the alignment blocks 60 and 70 are transferred to the outside of the fixing block 10 . Then, the elastic pads 61 , 63 , 72 and the cutting member 40 are in elastic contact with the inner surface 210 of the cylinder bore 200 . At this time, the hydraulic pressure of the working fluid is adjusted to a level suitable for the centering of the fixing block 10 and the formation of the oil pocket 230 .

Next, the actuator 20 is used to rotate and translate the fixed block 10 . Then, the cutting member 40 may form the oil pocket 230 by cutting the inner surface 210 of the cylinder bore 200 while rotationally driven and translationally driven along the fixing block 10 .

Since the cylinder bore processing apparatus 1 is capable of maintaining the state in which the cutting member 40 is in elastic contact with the inner surface 210 of the cylinder bore 200 at a constant pressure, the oil pocket 230 is continuously cut without a broken section. can be formed with For example, as shown in FIG. 5 , the cylinder bore processing apparatus 1 rotates and translates the fixed block 10 in a predetermined way using an actuator 20 to have a spirally extended oil pocket. (230) can be formed.

The formation position of the oil pocket 230 is not particularly limited. For example, the cylinder bore processing apparatus 1 may selectively form an oil pocket 230 in the central portion of the inner surface 210 of the cylinder bore 200 as shown in FIG. 5 .

The cylinder bore processing apparatus 1 adjusts the depth of the oil pocket 230 by adjusting the contact pressure between the cutting member 40 and the inner surface 210 of the cylinder bore 200, and the cutting member 40 It is possible to adjust the thickness (L) of the oil pocket 230 by adjusting the thickness, and to adjust the pitch interval (P) and the inclination angle (θ) of the oil pocket 230 by adjusting the movement path of the cutting member 40 . have.

For example, in the cylinder bore processing apparatus 1, the oil pocket 230 has a depth of 2 to 5 μm, a thickness L of 0.5 mm, a pitch interval P of 1 mm, and an inclination angle θ of 1°. ), the contact pressure, the thickness of the cutting member 40, and the movement path of the cutting member 40 may be adjusted. When the oil pocket 230 is formed in this way, the oil pocket 230 is formed in the central portion of the cylinder bore 200 to have an area ratio of 50%. Here, the area ratio of the oil pocket 230 means the ratio of the area occupied by the oil pocket 230 to the total area of the area where the oil pocket 230 is formed.

Since the cylinder bore processing apparatus 1 can continuously form the oil pocket 230 without a broken section, the formation time of the oil pocket 230 is reduced compared to the case where the oil pocket 230 is intermittently formed to increase productivity. By increasing the area ratio of the oil pocket 230 and reducing the shear resistance acting between the piston ring and the inner surface 210 of the cylinder bore 200, the fuel efficiency of the vehicle can be improved. In addition, the cylinder bore processing apparatus 1 can improve economic efficiency by forming the oil pockets 230 using the cutting member 40, which is easier to install and maintain compared to the laser apparatus.

In the above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited thereto and will be described below with the technical idea of the present invention by those of ordinary skill in the art to which the present invention pertains. It goes without saying that various modifications and variations are possible within the scope of equivalents of the claims.

1: Cylinder bore machining device
10: fixed block
20: actuator
30: centering unit
40: cutting member
50: hydraulic pump
60: first alignment block
70: second alignment block
72: elastic pad
74: fifth pinhole
80: elastic member
90: anti-rolling member
100: first support member
110: second support member
200: cylinder bore
210: inner side
220: oil pocket
230: oil pocket
300: piston
310: piston ring

Claims (20)

a fixing block provided with at least one seating groove and capable of being inserted into the cylinder bore;
an actuator capable of rotating the fixed block around a rotating shaft or reciprocating along the axial direction of the rotating shaft;
a centering unit seated in the seating groove, at least a portion of which is provided so as to be in elastic contact with the inner surface of the cylinder bore, and capable of aligning the fixing block so that the rotation axis and the central axis of the cylinder bore coincide; and
and a cutting member fixed to the centering unit so as to be in elastic contact with the inner surface of the cylinder bore and capable of forming an oil pocket by cutting the inner surface of the cylinder bore;
The centering unit includes an alignment block movably seated in the seating groove in a horizontal direction perpendicular to the axial direction, and the alignment block so that at least a portion of the alignment block is in elastic contact with the inner surface of the cylinder bore. and an elastic member for elastically pressing toward the outer direction of the fixing block,
The seating groove includes a first seating groove provided on one side of the fixing block and a second seating groove provided on the other side of the fixing block,
The alignment block includes a first alignment block that is movably seated in the first seating groove in the horizontal direction, and a second alignment block that is movably mounted in the second seating groove in the horizontal direction,
The elastic member is interposed between the first alignment block and the second alignment block to elastically press the first alignment block and the second alignment block toward the outside of the fixing block, respectively,
The fixing block includes an insertion hole for communicating the first seating groove and the second seating groove,
The elastic member is inserted into the insertion hole,
The centering unit further includes a rolling prevention member coupled to the alignment block to limit the rolling of the alignment block,
The anti-rolling member accommodates any part of the elastic member so as to be elastically pressed outward of the fixing block, and a first accommodation cap coupled to the first alignment block, and elastically pressed outward of the fixing block and a second accommodating cap that accommodates another portion of the elastic member and is coupled to the second alignment block,
The first accommodation cap.
a first accommodating groove which is formed to be opened in an inner direction of the fixing block and accommodates any part of the elastic member; and
A first flange having a diameter corresponding to the insertion hole and formed along the circumference at the other end thereof; includes,
The second accommodation cap,
a second accommodating groove formed to be opened in an inner direction of the fixing block to receive another portion of the elastic member; and
Cylinder bore processing apparatus comprising a; a second flange having a diameter corresponding to the insertion hole and formed along the circumference of the other end. According to claim 1,
The actuator rotates the fixed block in one predetermined direction so that a spiral oil pocket is continuously formed on the inner surface of the cylinder bore by the cutting member and simultaneously transports the fixed block in the axial direction. processing device. delete delete delete delete According to claim 1,
Each of the first alignment block and the second alignment block comprises at least one elastic pad provided to be in elastic contact with the inner surface of the cylinder bore by the elastic member. According to claim 1,
Any one of the first alignment block and the second alignment block has a fixing groove to which the cutting member is fixed,
The actuator is a cylinder bore machining apparatus, characterized in that for rotationally driving the fixing block in a predetermined direction so that the cutting member forms the oil pocket. delete According to claim 1,
The first accommodating cap and the second accommodating cap are each inserted into the insertion hole while accommodating the elastic member and installed. 11. The method of claim 10,
Cylinder bore processing apparatus, characterized in that it further comprises a hydraulic pump capable of filling the insertion hole with a working fluid pressurizable in the inner direction of the first accommodation cap and the second accommodation cap, respectively, or discharged from the insertion hole. . 12. The method of claim 11,
The hydraulic pump controls the hydraulic pressure of the working fluid to be smaller than the elastic pressure of the elastic member, and transfers the first accommodating cap and the second accommodating cap to the outside of the fixing block,
The hydraulic pump, by adjusting the hydraulic pressure of the working fluid to be greater than the elastic pressure of the elastic member, the first accommodating cap and the second accommodating cap are transferred in the inner direction of the fixing block. processing device. 12. The method of claim 11,
The fixing block is a cylinder bore processing apparatus, characterized in that it further comprises at least one filling hole for connecting the insertion hole and the hydraulic pump. According to claim 1,
The first alignment block and the first accommodation cap are arranged such that a portion overlaps each other in the axial direction,
The anti-rolling member may further include a first pin penetrating the overlapping portion in the axial direction to couple the first alignment block and the first accommodation cap. 15. The method of claim 14,
The first alignment block includes a first insertion groove formed on one surface to insert the end of the first accommodation cap, and a first pinhole drilled in the axial direction to communicate with the first insertion groove,
The first accommodation cap has a second pinhole punched at an end inserted into the first insertion groove so as to communicate with the first pinhole,
The first pin is a cylinder bore machining apparatus, characterized in that installed inserted into the first pinhole and the second pinhole. 16. The method of claim 15,
Cylinder bore processing apparatus, characterized in that it further comprises a first support member interposed between the first alignment block and the insertion hole to support the first accommodation cap. 17. The method of claim 16,
The first support member includes a first support hole into which the first accommodation cap is inserted, and a third pin hole into which the first pin is inserted,
The seating groove, Cylinder bore processing apparatus, characterized in that it further comprises a third seating groove provided between the first insertion groove and the first seating groove so that the first support member is seated. According to claim 1,
The second alignment block and the second accommodation cap are arranged such that a part overlaps each other in a horizontal direction perpendicular to the axial direction,
The anti-rolling member may further include a second pin penetrating the overlapping portion in the horizontal direction to couple the second alignment block and the second accommodation cap. 19. The method of claim 18,
The second accommodating cap includes a second insertion groove formed at an end so that any part of the second alignment block is inserted, and a fourth pinhole drilled in the horizontal direction to communicate with the second insertion groove,
The second alignment block has a fifth pinhole drilled in the any part to communicate with the fourth pinhole,
The second pin is a cylinder bore processing apparatus, characterized in that the installation is inserted into the fourth pinhole and the fifth pinhole. 20. The method of claim 19,
Further comprising a second support member interposed between the second alignment block and the insertion hole to support the second accommodation cap,
The second support member, a second support hole into which the second accommodation cap is inserted, and a third insertion groove into which the other portion of the second alignment block is inserted.

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