KR100993211B1 - Piston assembly system and method of engine assembly line - Google Patents

Abstract

The present invention relates to an apparatus and method for assembling a piston of an engine assembly line, and more particularly, to seamlessly assemble a piston in an engine block during assembly of an engine, to prevent damage to a piston ring, and to determine in advance whether there is an abnormality of the piston. It relates to a piston assembly of the engine assembly line and method for reducing the defect of the engine to the minimum.

To this end, the present invention includes a plurality of bores provided in the engine block; A lower guide positioned below the engine block and provided with an elastic center device; A piston feed jig having an elastic center device; And an insertion member for assembling the piston. Characterized in that configured.

In addition, the present invention comprises the steps of supplying a piston to the piston supply jig; Supplying an engine block to a piston assembly device; The lower guide is lifted and inserted into the engine block; The piston feed jig is transferred to an upper portion of the engine block; Making a position correction by lowering the piston supply jig and determining that the piston is seated on the engine block; The insertion member descends to assemble the piston of the piston supply jig; Determining whether the piston contacts the lower guide when the piston descends by the insertion member descending; Determining a defect of the engine block and the piston when assembling the piston by the insertion member; Characterized in that it comprises a; step of taking out the defective product proved to be defective.

Engine, Engine Block, Bore, Piston, Piston Ring, Piston Feed Jig

Description

Piston assembly system and method of engine assembly line

The present invention relates to an apparatus and method for assembling a piston of an engine assembly line, and more particularly, to seamlessly assemble a piston in an engine block during assembly of an engine, to prevent damage to a piston ring, and to determine in advance whether there is an abnormality of the piston. It relates to a piston assembly of the engine assembly line and a method for reducing the engine defect to a minimum.

An engine in the dictionary meaning is a power device that is used in a car and uses gasoline or gasoline as fuel. The engine includes a rotary engine and a reciprocating engine. In general, an engine refers to a reciprocating engine. The reciprocating inside the engine is powered by the mixer's intake, compression, explosion and exhaust processes.

A reciprocating engine is composed of an engine block, which can be called an engine body, a piston which is assembled by a bore of the engine block, a piston which is reciprocated vertically and linearly by an explosion by a mixer, and is rotated by a linear reciprocating motion of the piston. The engine is configured by a configuration such as a necking rod (hereinafter abbreviated as "con rod").

The piston receives direct pressure from the mixer when it burns and continuously repeats the high-speed linear reciprocating motion in the engine block. It is required to have light, high strength and low thermal expansion. Since a combustion pressure of about 40 kg / cm2 is generated, the piston needs to have a clearance close to zero in order to operate under pressure.

To this end, the piston is universally provided with a piston ring to fill the gap between the piston and the bore of the engine block, so that the pressure of the mixer does not leak and the oil is compressed through the bore wall to prevent the oil from entering the combustion chamber. There is an oil ring for the purpose of lubrication and the airtightness of the engine block is maintained by each operation.

In addition, the cone rod is connected to the piston to be rotated by the piston, the structure is divided into a small end coupled to the piston, and a large end coupled to the crankshaft.

In addition, there are many components constituting the engine, but description thereof will be omitted.

An engine is the core of various machinery and vehicles driven by power, and is essential to real life.

Therefore, the production of the engine is generally assembled by the engine assembly line for mass production.

Among them, various assembly apparatuses and methods have been used for assembling pistons to a plurality of bores provided in an engine block, which is one of the important components of the engine.

In general, the piston assembly device, when the engine block is supplied by the automatic supply means, the piston is supplied to the upper part of the engine block to form the piston by inserting the piston into the bore provided in the engine block to form the piston.

In addition, a method of supplying a piston to a separate auxiliary means may be used by placing a separate auxiliary means on an upper portion of the engine block.

In addition, when the piston is supplied, it is common to provide a separate supply means by the piston supply to supply the piston to the supply means, and the supply means is conveyed to form the assembly of the piston.

Conventional piston assembling apparatus and method as described above has a problem that the damage of the piston ring is often caused by the protrusion of the piston ring coupled to the piston when the piston is supplied to a separate supply means.

In addition, there is no separate auxiliary means accurately located in the engine block is located on the top of the bore, there is no way to determine the correct seating when mounting, so that the correct assembly of the piston according to the separation or the center error of the auxiliary means and the bore There was a problem that caused a serious defect of the engine that leaks or leaks oil.

In addition, since the piston supplied to the supply means is not easy to determine the center of the bore or the upper center of the auxiliary means by the supply means to match the center of the bore or auxiliary means usually due to a predetermined distance or center error The failure of the piston or the piston ring due to the collision of the piston or the protrusion of the piston ring occurs a problem that a serious defect occurs in the engine.

In addition, since the end of the cone rod provided on the piston and fixed to the cone rod collides with the crankshaft to be damaged or is not positioned at the correct position, a serious defect occurs in the engine due to mutual poor assembly with the crankshaft. .

The present invention provides a plurality of bores provided in the engine block to solve the above problems; A lower guide positioned below the engine block and provided with an elastic center device; A piston feed jig having an elastic center device; And an insertion member for assembling the piston.

In the present invention, the lower guide, a pair of circular arcs having the same diameter as the inner diameter of the bore is provided so as to extend to the upper portion having a predetermined length, the lower portion of the circular arc is fixed to the upper portion of the elastic center device, The lower portion of the elastic center device is configured to be fixed to the lifting means, it is preferable that the measuring sensor for determining whether the piston is normally in contact with the upper portion of the arc portion is provided on the upper portion of the arc portion.

In the present invention, the piston supply jig is provided with a supply jig main body is fixed to the upper portion of the elastic center device to the conveying means, the upper portion is fixed to the lower portion of the elastic center device, the piston guide through the inside of the supply jig body A ball is provided, and preferably, at least three or more distance measuring sensors are provided below the supply jig main body.

In the present invention, the insertion member is provided with a pressing portion forming a pressing of the piston, the pressing portion is provided on the pressing portion is provided with a pre-pressure at a predetermined pressure, is fixed to the upper pressure portion to form the assembly of the piston It is preferably provided as a shaft for transmitting a pressure input for, and is configured to make a measurement of the pressure input is added to the insertion member is provided with a pressure measuring sensor inside the pressure portion.

In addition, a plurality of bores provided in the engine block; A centering jig positioned on the bore and seated on the bore; A piston feed jig having an elastic center device; Insert member for assembling the piston; And a lower guide positioned below the engine block and provided with an elastic center device.

In the present invention, the centering jig is provided with a centering jig main body, the transfer means is fixed to the upper portion of the elastic center device, the upper portion is fixed to the lower portion of the elastic center device, the piston guide for guiding the piston inside the centering jig body Ball is provided, it is preferable that at least three or more distance measuring sensor is provided below the centering jig body.

In the present invention, the piston supply jig is provided with a supply jig main body is fixed to the upper portion of the elastic center device to the conveying means, the upper portion is fixed to the lower portion of the elastic center device, the piston guide through the inside of the supply jig body Ball is provided, it is preferable that at least three or more distance measuring sensor is provided below the supply jig body. Piston assembly of the engine assembly line, characterized in that.

In the present invention, the insertion member, the pressing portion for the pressing of the piston, the center correction portion provided on the pressing portion, at least three or more center guide members to the inside and to achieve the insertion and the center, It is preferable that the pressure unit is provided on the correction unit, forms a preload at a predetermined pressure, and has a pressure measuring sensor therein.

In the present invention, the lower guide, a pair of circular arcs having the same diameter as the inner diameter of the bore is provided so as to extend to the upper portion having a predetermined length, the lower portion of the circular arc is fixed to the upper portion of the elastic center device, The lower portion of the elastic center device is preferably configured to be fixed to the lifting means.

In addition, the piston is supplied to the piston supply jig; Supplying an engine block to a piston assembly device; The lower guide is lifted and inserted into the engine block; The piston feed jig is transferred to an upper portion of the engine block; Making a position correction by lowering the piston supply jig and determining that the piston is seated on the engine block; The insertion member descends to assemble the piston of the piston supply jig; Determining whether the piston contacts the lower guide when the piston descends by the insertion member descending; Determining a defect of the engine block and the piston when assembling the piston by the insertion member; Characterized in that it comprises a; step of taking out the defective product proved to be defective.

In addition, the step of supplying a piston to the piston supply jig; Supplying an engine block to a piston assembly device; A centering jig is transferred to an upper portion of the engine block; Inserting the member after the centering jig is lowered; Determining whether the centering jig is inserted in the correct position after the centering jig error correction by the insertion member; The piston feeding jig is transferred to an upper portion of the centering jig; Making a position correction by lowering the piston supply jig and determining that the piston is coupled with the centering jig; The insertion member descends to assemble the piston of the piston supply jig; Determining whether the piston contacts the lower guide when the piston descends after the lower guide rises; Determining a defect of the engine block and the piston when assembling the piston by the insertion member; Characterized in that it comprises a; step of taking out the defective product proved to be defective.

As described above, the assembling apparatus and method of the engine assembly line of the present invention achieve precise center error correction by the elastic center device, thereby smoothly assembling the piston when assembling the piston, and do not generate minute gaps on the mating surfaces when the components are combined. Therefore, since damage to the piston ring provided in the piston can be prevented, there is an effect of preventing an engine defect in advance.

In addition, damage to the piston, piston ring, bore, crankshaft, and abnormalities can be detected in advance by measuring sensors, distance sensors, pressure sensors, etc., so that defects caused by piston assembly can be corrected. It works.

An embodiment for carrying out the present invention will be described with reference to the drawings.

(First Embodiment of Piston Assembly Device According to the Present Invention)

1 is a cross-sectional view showing an elastic center device applied to the present invention, Figure 2 is an assembled state cross-sectional view showing a first embodiment of the assembly apparatus according to the present invention.

As shown in FIG. 1, the elastic center apparatus applied to the present invention includes a plurality of elastic bodies 16 provided between the upper support 13 and the lower support 14, and the upper support 13 and the lower support 14. It is composed of a plurality of limits 30 provided between the upper support 13 and the lower support 14.

In addition, the position correction measurement for measuring the value of any one of the upper support 13 or the lower support 14 of the elastic center device 10 for the correction of the center error in order to correct the center error according to the present invention The sensor 40 is provided above the upper support 13 or the lower support 14 to provide at least one contact with the head of the limit 30.

The elastic center device applied to the present invention as described above, the coupling relationship and the effect of the upper, lower support 13, 14, the elastic body 16, and the limiter 30 constituting the elastic center device 10 is conventional Since it is described in detail in Korean Patent Application Publication No. 2001-85013 (name: Press-fit elastic center device) of the applicant mentioned in the technology, the description thereof will be omitted.

As shown in FIG. 2, the piston assembly device 100 includes a plurality of bores 114 provided in the engine block 110 and a lower portion which is positioned below the engine block 110 and provided with a first elastic center device. Guide 120, the piston supply jig 130 is provided with a second elastic center device, and the insertion member 140 for assembling the piston (102).

The lower guide 120 is provided with a pair of circular arc portions 122 having the same diameter as the inner diameter of the bore 114 to extend a predetermined length, the upper portion of the circular arc portion 122 It is fixed to the upper portion of the first elastic center device, the lower portion of the first elastic center device is configured to be fixed to the lifting means 128, it is determined whether the piston 102 is in normal contact with the upper portion of the arc portion 122 The measuring sensor 129 is provided on the upper portion of the arc (122).

The piston supply jig 130 is provided with a supply jig main body 132, the upper portion of the second elastic center device is fixed to the transfer means 131, the upper portion is fixed to the lower portion of the second elastic center device, the supply A piston guide hole 135 is provided inside the jig body 132, and at least three distance measuring sensors 137 are provided below the supply jig body 132.

The insertion member 140 is provided with a pressing part 142 for pressing the piston 102, and is provided with a pressure part 145 provided on the pressing part 142 to form a preload at a predetermined pressure. Is fixed to the pressure unit 145 is provided with a shaft 148 for transmitting the pressure input for forming the assembly of the piston 102, the pressure measuring sensor 149 is provided inside the pressure unit 145 It is configured to make a measurement of the pressing force added to the insertion member 140.

Referring to the coupling relationship and the effect according to the first embodiment of the piston assembly device configured as described above with reference to the drawings.

3 is a cross-sectional view illustrating a state in which the lower guide of FIG. 2 is raised.

As shown in FIG. 3, the lower guide 120 is fixed to the first elastic center device in a state in which the engine block 110 is located below the piston assembly device 100 by a separate supply means (not shown). Ascending upwards by means 128.

At this time, the arc portion 122 provided on the upper portion of the first elastic center of the lower guide 120 is inserted along the inner surface of the bore 114 provided in the engine block 110, and the arc portion 122 and If the centers of the bores 114 do not coincide with each other, the position correction of the arc portion 122 is performed so that the centers coincide with each other by the first elastic center device.

The arc portion 122 is formed to be the same as the inner diameter of the bore 114 and is configured to be open in the middle so as not to interfere with the crankshaft 116.

In addition, the value moved by the position correction of the arc portion 122 in the position correction measurement sensor 40 provided in the first elastic center device is measured by the contact of the limit 30 and the same arc portion 122 When the position correction is made, the lower guide 120 or the position of the engine block 110 is corrected so that the bore 114 of the engine block 110 and the arc portion 122 of the lower guide 120 coincide with each other. Will be achieved.

Figure 4 is a cross-sectional view showing a state in which the lower guide of Figure 3 is raised piston feed jig is coupled.

As shown in FIG. 4, the lower guide 120 rises to protrude upward from the bore 114 of the engine block 110, and the piston supply jig 130 is connected to the engine block by the transfer means 131. The upper portion of the 110 is transferred, and the piston supply jig 130 descends at a position coinciding with the center of the bore 114 previously input.

When the piston supply jig 130 is lowered, it is transferred to the upper portion of the bore 114 along the outer side of the arc portion 122 of the lower guide 120.

In addition, the center of the bore 114 by the lower guide 120 to achieve a center coincidence position correction by the second elastic center device provided in the upper portion of the piston supply jig 130 and the exact center of the bore 114 There is a consensus.

In addition, the plurality of distance measuring sensors 137 provided in the lower portion of the piston supply jig 130 is to measure whether the piston supply jig 130 is precisely seated on the upper portion of the bore 114.

FIG. 5 is a cross-sectional view illustrating a state in which the piston supply jig of FIG. 4 is engaged with the bore and the piston is inserted into the bore by the insertion means.

As shown in FIG. 5, the lower guide 120 and the first elastic center make precise seating on the bore 114, and if it is determined by the distance measuring sensor 137 and there is no abnormality, the engine block 110 is provided. Insertion member 140, which was waiting on the upper portion, descends to exert a pressure input to the piston 102 to achieve the lowering of the piston 102.

When the piston 102 is lowered due to the lowering of the insertion member 140, the pressing portion 142 of the insertion member 140 presses the upper portion of the piston 102, and the pressing portion 145 is pressed by the pressing portion 102. When the elastic member 146 provided in the pre-formed state at a predetermined pressure is added to the pressing portion 142 when a pressure outside the predetermined pressure is applied to the pressure measuring sensor 149 provided in the pressure portion 142. When the pressure is measured, the pressure is added to the predetermined pressure or more, and the insertion member 140 is stopped to determine whether the piston 102 or the bore 114 is defective.

6 is a cross-sectional view illustrating a state where the piston is inserted into the bore and assembled by the insertion member of FIG. 5.

As shown in FIG. 6, when the piston 102 descends due to the lowering of the insertion member 140, the piston 102 is guided to the piston guide hole 135 of the piston supply jig 130 to achieve a smooth drop. The guide hole 135 has the same inner diameter as the bore 114 of the engine block 110 and the piston 102 is inserted into the bore 114 to be assembled to the crank shaft 116.

In addition, a gap occurs in the bore 114 in which the piston supply jig 130 and the bore 114 are seated mutually, so that the piston ring 102a provided in the piston 102 is pinched between the gaps or protrudes from the piston ring 102a. When the damage caused by the excessive pressure is generated in the pressure portion 145 of the insertion member 140 and the pressure measuring sensor 149 is to detect whether the piston 102 is defective.

In addition, since the end portion 106 of the cone rod 104 provided on the piston 102 is seated above the arc portion 122 of the lower guide 120, the piston 102 descends to form a cone rod 104. To prevent collision with the inner surface of the bore 114 or collision with the crankshaft 116 due to the movement of the breakage of the inner surface of the bore 114 or the breakage of the crankshaft 116 and the large end of the cone rod 104. This is to prevent breakage of the 106.

In addition, a measuring sensor for measuring whether the piston 102 is seated on the upper part of the arc part 122 is provided on the upper part of the arc part 102 so as to have a large end 116 of the cone rod 104 provided in the piston 102. ) Is to measure the seating.

As described above, when the piston 102 is normally assembled by the lower guide 120, the piston supply jig 130, and the insertion member 140, the insertion member 140 is raised, and the piston supply jig 120 is new. The piston 102 is conveyed to achieve the supply of the supply, the lower guide is positioned in the lower portion of the engine block 110, the engine block 110 is to take out another assembly line.

As described above, the bore of the engine block and the piston supply jig are aligned with the correct center by the lower guide, so that the piston is smoothly inserted.

In addition, since the fine position correction is made by the first elastic central device provided in the lower guide and the supply jig to prevent damage to the piston in advance.

In addition, by measuring the distance between the bore and the piston supply jig by the distance measuring sensor provided in the piston supply jig to prevent the occurrence of engine defects in advance, the lower part of the piston by the measurement sensor provided in the lower guide It is possible to determine whether the assembly of the piston is made normally by measuring the seating of the guide.

In addition, damage to the piston ring or damage to the piston or bore is measured by a pressure measuring sensor provided in the pressure unit, thereby preventing the engine defect.

(Second Embodiment of the Piston Assembly Device According to the Present Invention)

8 is an assembled state sectional view showing a second embodiment of the assembling apparatus according to the present invention.

As shown in FIG. 8, the piston assembly 200 includes a plurality of bores 214 provided in the engine block 210, and a centering jig positioned on the bore 214 and positioned above the bore 214. And a piston supply jig 230 having a second elastic center device, an insertion member 240 for assembling the piston 102, and a lower portion of the engine block 110. It is composed of a lower guide 250 having a central device.

The centering jig 220 is provided with a centering jig main body 222 in which a transfer means 221 is fixed to the upper portion of the second elastic center device, the upper portion is fixed to the lower portion of the second elastic center device, the centering jig body 222 is provided with a piston guide hole 224 for guiding the piston 202 inside, and at least three or more distance measuring sensors 226 are provided under the centering jig body 222.

The piston supply jig 230 is provided with a feed jig main body 232, the upper portion of which is fixed to the transfer means 231, the upper portion of the second elastic center device is fixed to the lower portion of the second elastic center device, the supply A piston guide hole 235 is provided inside the jig body 232, and at least three distance measuring sensors 237 are provided below the supply jig body 232.

The insertion member 240 is provided with a pressing part 241 for pressing the piston 202 and an upper part of the pressing part 241, and at least three or more center guide members 245 protrude and insert the inner side. It consists of a center correction unit 244, and a pressure unit 246 provided on the center correction unit 244, to achieve a preload at a predetermined pressure and having a pressure measuring sensor 248 therein.

The lower guide 250 is provided with a pair of circular arc portions 252 having the same diameter as the inner diameter of the bore 214 extending upwards in a predetermined length, the lower portion of the circular arc portion 252 is formed It is fixed to the upper portion of the first elastic center device, the lower portion of the first elastic center device is configured to be fixed to the lifting means 254, it is determined whether the piston 202 is in normal contact with the upper portion of the arc portion 252. The measuring sensor 256 is provided on the upper portion of the arc (252).

Referring to the coupling relationship and the operation effect according to a second embodiment of the piston assembly device configured as described above are as follows.

FIG. 9 is a cross-sectional view illustrating a state in which the centering jig of FIG. 8 is transferred and positioned above the bore, and the insertion member is lowered.

As shown in FIG. 9, when the centering jig 220 is transferred by the transfer means 221 and positioned above the bore 214, the insertion member 240 that is waiting on the engine block 210 is lowered. The engine block 210 is stopped at a predetermined position inside the bore 214, and the centering jig 220 which is waiting on the upper bore 214 descends to be seated on the upper bore.

As described above, the center of the centering jig 220 and the center of the bore 214 do not form an exact coincidence when the upper portion of the bore 214 is seated by the lowering of the centering jig 220.

FIG. 10 is a cross-sectional view illustrating a state in which a centering jig and a bore are coupled to each other by an insertion member of FIG. 9.

As shown in FIG. 10, when the centering jig 220 is seated on the upper bore 214, the pressing part 241 provided in the insertion member 240 rises, and the center of the pressing part 241 is raised. As the center guide member 245 provided in the correction unit 244 protrudes and the inner surface of the piston guide hole 224 of the bore 214 and the centering jig 220 coincide with each other, the piston of the centering jig 220 The guide hole 224 coincides with the inner surface of the bore 214 to coincide with the center thereof.

When the position of the centering jig 220 is corrected, the position correction of the centering jig 220 is performed by the third elastic center device provided on the centering jig 220, and the position correction measuring sensor provided in the third elastic center device ( In 40, the position correction value of the centering jig 220 is measured to achieve accurate position correction by the transfer means 221, and the centering jig 220 forms the upper portion of the bore 214.

In addition, the plurality of distance measuring sensors 226 provided below the centering jig 220 measures whether the centering jig 220 achieves precise seating on the upper portion of the bore 214.

In addition, the center guide member 245 protruding from the center correcting portion 244 is lowered as the pressing portion 241 of the insertion member 240 is lowered after the position correction of the centering jig 220 is performed. It is inserted into the insertion member 240 is raised to the position for inserting the piston 202.

11 is a cross-sectional view illustrating a state in which a piston supply jig is coupled to the settering jig of FIG. 9.

As shown in FIG. 11, the piston supply jig 230 positioned by the conveying means 231 on the upper portion of the centering jig 220 forms a mutual coupling with the upper portion of the centering jig 220 by the lowering of the conveying means 231. will be.

When the upper portion of the centering jig 220 and the piston supply jig 230 is coupled, the upper portion of the centering jig 220 and the lower portion of the supply jig main body 232 of the piston supply jig 230 are preferably configured to form mutual coupling. For example, it is preferable that the coupling step is provided in the center of the jig and the coupling step is protruded in the lower part of the main supply jig so that each coupling step forms a mutual coupling.

In addition, it is more preferable that the centering jig 220 and the piston guide holes 224 and 235 of the piston supply jig 230 have the same inner diameter by the same machining operation to achieve precise coupling.

In addition, the plurality of distance measuring sensors 237 provided under the piston supply jig 230 measures whether the piston supply jig 230 achieves precise seating on the centering jig 220.

12 is a cross-sectional view illustrating a state in which an insertion member is lowered into the piston supply jig of FIG. 11 to insert a piston.

As shown in FIG. 12, when the piston 202 is lowered by the lowering of the insertion member 240, and the excessive pressure is applied to the insertion member 240 when the piston 202 is lowered, the pressure measuring sensor 248 is applied. The effect of measuring this and the effect of guiding the piston 202 by raising the lower guide 250 is the same as the description of Figs. 5 and 6 of the first embodiment of the assembling apparatus according to the present invention. Omit.

In addition, the state forming the original position of the piston assembly according to the invention is to proceed in the reverse order to the operation for assembly.

As described above, the bore of the engine block, the centering jig, and the piston supply jig are precisely coupled to each other to smoothly insert the piston.

In addition, since the fine position correction is made by the centering jig and the elastic center unit provided in the piston supply jig and the lower guide is made to precisely match the center to prevent the smooth assembly of the piston and damage to the piston in advance.

In addition, by determining the gap between the centering jig, the piston supply jig and the upper bore by the distance measuring sensor provided in the centering jig and the piston supply jig to prevent the defect of the engine in advance, the measurement sensor provided in the lower guide By measuring whether the lower guide seat of the piston can be determined that the assembly of the piston is normally made.

In addition, damage to the piston ring or damage to the piston, bore, etc. is measured by a pressure measuring sensor provided in the pressure unit, thereby preventing an engine defect.

(One embodiment of the lower guide according to the present invention)

An embodiment of the lower guide according to the first and second embodiments of the piston assembly according to the present invention will be described in more detail with reference to the drawings.

As shown in FIGS. 2 and 8, the lower guides 120 and 250 have a pair of arc portions 122 and 252 having the same diameter as the inner diameters of the bores 114 and 214 provided in the engine blocks 110 and 210. It is provided so as to extend, the upper portion of the arc (122, 252) is provided with a tapered portion 124, 254 at a predetermined angle, the fixing bolt provided on the large end of the cone rod is seated on the upper portion of the arc (122, 252) Grooves 126 and 256 are recessed to a predetermined depth, and lower portions of the arc portions 122 and 252 are fixed to the upper portion of the first elastic center apparatus, and lower portions of the first elastic center apparatus are fixed to the lifting means 128 and 258. The pair of circular arcs 122 and 252 are provided with measurement sensors 129 and 259 for measuring whether the pistons 102 and 202 are in contact with each other.

The lower guide (120, 250) configured as described above is located in the lower portion of the engine block (110, 210) as shown in Figures 3 and 4 and 12 and 13 of the cone rod (104,204) provided in the piston (102,202) As shown in FIG. 13, the fixing bolts provided at the large ends 106 and 206 are seated in the mounting grooves 126 and 256, and the bores 114 and 214 and the crank shafts are formed by the large ends 106 and 206. This is to prevent damage to the (116, 216) or the large ends (106, 206).

In addition, when the bores 114 and 214 are inserted by the taper portions 124 and 254 provided on the upper portions of the arc portions 122 and 252, the lower guides 120 and 250 are corrected by the tapered portions 124 and 254 to smoothly the inner surfaces of the bores 214 and 214. Insertion is made.

In addition, the piston supply jig 130 is smoothly positioned along the taper 124 when the piston supply jig 130 according to the first embodiment of the piston assembly 100 is seated on the upper portion of the bore 114. Will be achieved.

Effects of the first elastic center device and the measuring sensors 129 and 259 provided in the lower guide are the same as those of the first and second embodiments of the assembling apparatus according to the present invention, and thus a detailed description thereof will be omitted.

(First Embodiment of Piston Feed Jig According to the Present Invention)

Referring to the first embodiment of the piston supply jig according to the first embodiment of the piston supply device according to the present invention in more detail as follows.

As shown in FIG. 2, the piston supply jig 130 has an upper portion of the second elastic center device fixed to the transport means 131, and a supply jig main body 132 whose upper part is fixed to the lower portion of the second elastic center device. Is provided, at least three or more piston supply grooves 134 are provided with a predetermined depth on the supply jig main body 132, the piston guide hole 135 through the inside is provided, the supply jig main body 132 The lower portion extends to a predetermined length so that the coupling paper portion 136 at a predetermined angle protrudes from the end thereof, and at least three distance measuring sensors 137 are provided below the supply jig body 132. A stop member 138 is fixed to the outside of the supply jig main body 132 to be rotated to form a catch of the piston 102, and the insertion groove 139 into which the stop member 138 is inserted is provided to be through. .

In addition, the inner diameter of the piston guide hole 135 provided in the piston supply jig 130 is to be through the same inner diameter as the bore 114 provided in the engine block 110.

In addition, the coupling paper 136 is guided to the taper 112 of the bore 114 provided in the engine block 110 is provided to form a mutual coupling.

The first embodiment of the piston supply jig according to the present invention configured as described above is the upper portion in the arc portion 122 of the lower guide 120 inserted into the bore 114 of the engine block 110 as shown in FIG. Piston supply jig 130 is located in the descending, the piston guide hole 135 provided in the piston supply jig 130 is tapered portion provided on the upper portion of the circular arc 122 provided on the lower guide 120 Along the 124, the piston feed jig 130 is lowered to form a center position correction.

In addition, the coupling taper portion 136 provided in the lower portion of the piston supply jig 130 makes a more accurate center error correction of the piston supply jig 130 along the taper 112 provided in the upper portion of the bore 114 to FIG. 5. As shown in the piston bore 114, the piston supply jig 130 is coupled to be seated.

In addition, by measuring the precise seating of the piston supply jig 130 and the bore 114 by a plurality of distance detection sensor 137 provided in the lower piston supply jig 130, which of the piston supply jig 130 One side is lifted or detects whether a gap with the top of the door 114 occurs.

6, when the piston 202 is lowered by the lowering of the insertion member 140, the stop member 138 rotates by a rotation means (not shown) to smoothly lower the piston 102. To achieve.

As described above, the piston supply jig 130 which forms the piston 102 by supplying the piston 102 to the engine block 110 by the insertion member 140 has the engine block in the reverse order of operation for assembling the piston. Departure from (110) is to achieve a feed to the piston supply position by the conveying means for the supply of a new piston (102).

In addition, as shown in FIG. 7, the piston 102 is bitten by the piston biting means (unsigned) for the supply of the piston 102 when the new piston 102 is supplied, and thus the piston 102 is inserted into the piston supply jig 130. ) When the seating means is inserted into the piston supply groove 139 provided in the piston supply jig 130, and the piston 102 is caught by the stop member 138, the biting means is moved from the piston supply groove 134. It is a departure.

In addition, as described above, the piston ring provided in the piston is separated from the piston by the piston guide hole having the same inner diameter as the bore inner diameter when the bite means is separated from the piston supply means after the supply of the piston. This is to prevent damage to the piston ring due to protrusion.

The effect of the central error correction by the second elastic center device provided in the piston supply jig is the same as that described in the first embodiment of the piston assembly according to the present invention, and a detailed description thereof will be omitted.

(Second embodiment of the piston supply jig according to the present invention)

The second embodiment of the piston supply jig according to the second embodiment of the piston supply device according to the present invention will be described in more detail with reference to the drawings.

As shown in FIG. 2, the piston supply jig 230 has an upper portion of the second elastic center device fixed to the transport means 231, and a supply jig main body 232 whose upper part is fixed to the lower portion of the second elastic center device. Is provided, at least three or more piston supply grooves 234 are provided at a predetermined depth on the supply jig body 232, the piston guide hole 235 is provided through the inside, the supply jig body 232 The lower end extends to a predetermined length, and a coupling step 236 is provided at an end thereof, and at least three distance measuring sensors 237 are provided below the supply jig main body 232, and outside the supply jig main body 232. The stop member 238 is fixed to the rotation is provided to form a locking of the piston 202, the insertion groove 239 into which the stop member 238 is inserted is provided to be through.

In addition, the inner diameter of the piston guide hole 235 provided in the piston supply jig 230 is to pass through the same inner diameter as the bore 214 provided in the engine block 210.

According to the second embodiment of the piston supply jig according to the present invention configured as described above, the piston supply jig 230 is lowered to the coupling step 223 provided on the centering jig 220 as shown in FIGS. 11 and 12. Coupling step 236 provided in the to form a center error correction while forming a mutual coupling to the top of the centering jig 220.

In addition, since the operation and effect of the piston supply jig 230 is the same as the first embodiment of the piston supply jig, a detailed description thereof will be omitted.

However, the coupling step 223 of the centering jig 220 and the coupling step 236 of the piston supply jig 230 are different from each other, but the effect thereof is the same.

(One embodiment of the settering jig according to the present invention)

An embodiment of a centering jig according to a second embodiment of a piston supply device according to the present invention will be described in more detail with reference to the drawings.

As shown in FIG. 8, the centering jig 220 includes a centering jig main body 222 in which a transfer means 221 is fixed to an upper portion of the third elastic center apparatus, and an upper portion thereof is fixed to the lower portion of the third elastic center apparatus. A coupling step 223 is provided at an upper portion of the centering jig main body 222, and a piston guide hole 224 is provided to guide the piston 202 into the centering jig main body 222, and the centering jig main body is provided. A coupling taper 225 having a predetermined angle is provided at a lower portion thereof, and at least three or more distance measuring sensors 226 are provided at the lower portion of the centering jig body 222.

In addition, the inner diameter of the piston guide hole 224 provided in the centering jig body 222 is provided in the same manner as the inner diameter of the bore 214 provided in the engine block 210.

The centering jig configured as described above is transferred by the transfer means 221 to the upper portion of the bore 214 provided in the engine block 210 as shown in FIG. 9, and according to the second embodiment of the piston assembly apparatus of the present invention. As illustrated in FIG. 9, when the insertion member 240 is positioned inside the bore 214 as the insertion member 240 descends, the centering jig 220 descends.

In addition, as shown in FIG. 10, when the centering jig 220 descends, the center guide member 245 provided in the insertion member 240 is in a state in which the centering jig 220 is temporarily seated on the upper portion of the bore 214. When the protrusion is fixed to the inner surface of the bore 214, the piston guide hole 224 of the centering jig 220 forms the centering jig 220 on the upper portion of the bore 214 along the center guide member 245. will be.

In addition, when the centering jig 220 has the first center error correction by the center guide member 245, the coupling taper 225 provided under the centering jig 220 is lowered by the lowering of the centering jig 220. 214 is coupled to the taper 212 provided in the upper portion to achieve a second precision center error correction, the centering jig 220 is precisely seated with the upper bore 214, the piston guide hole 224 without a gap Since the bore 214 inner diameters coincide with each other, smooth assembly of the piston 202 and damage of the piston ring 202a are prevented when the piston 202 is assembled by the insertion of the piston 202.

Effects of the third elastic center device and the plurality of distance measuring sensors 237 provided on the centering jig 220 are the same as those of the second embodiment of the assembly apparatus according to the present invention, and thus a detailed description thereof will be omitted.

(First Embodiment of Insertion Member According to the Present Invention)

Referring to the first embodiment of the insertion member according to the first embodiment of the piston supply device according to the present invention in more detail as follows.

As shown in FIG. 2, the insertion member 140 has a pressing portion 142 that forms a pressing of the piston 102 at a lower portion thereof, and a head portion 144 is coupled to an upper portion of the pressing portion 142. Is provided to the upper portion, the pressing portion 142 is provided on the top to make the head portion 142 is seated therein, the elastic member 146 is seated on the head portion 144, the upper part delivers the pressure input The shaft 148 is fixed, and the pressure unit 145 is provided between the head portion 144 and the shaft 148 such that the elastic member 146 achieves a preload at a predetermined pressure.

The pressing portion and the head portion are preferably fixed by making a mutual coupling by a screw method, it is preferable to be fixed by making a mutual coupling by a fixing pin for the convenience of the user.

In addition, the pressure unit 145 is provided with a pressure measuring sensor 149 for measuring the pressure added to the piston 102 so that the insertion member 140 can measure the pressure input to press the piston 102. It is composed.

In addition, the pressing portion 142 is provided with a cylindrical shape of the lower portion is a predetermined diameter for the assembly of the piston (102).

6, the piston 102 is guided to the piston supply jig 130 by pressing the piston 102 at a predetermined pressure to assemble the piston 102 as shown in FIG. 6. It is inserted into the bore 114 of the 110 to form an engine assembly.

As described above, the insertion member 140 which is lowered at a predetermined pressure for assembling the engine block 110 has a pressure part as the shaft 148 fixed to the pressure part 145 is lowered at a predetermined pressure. 145 is lowered, the pressing portion (145) by pressing the head 144 of the pressing portion 142 of the pressing member 142 pre-loaded at a predetermined pressure is provided with the elastic member 146 inside the pressure portion (145) 142 acts a predetermined pressure on the piston 102 to make a descent.

When the piston 102 is assembled by the insertion member 140 as described above, the piston feed jig 130 and the bore 114 are caught by the bias or protrusion of the piston ring 102a provided in the piston 102. When the piston 102 generates a repulsion force of more than a predetermined pressure due to damage of the piston ring 102a, the head 144 of the pressing portion 142 is larger than the preload of the elastic member 146, and thus the pressing portion 142 The head 144 is raised, the pressure measurement sensor 149 provided inside the pressure unit 145 by the rise of the head 144 detects this and the engine of the engine due to damage of the piston ring (102a) Informing the defect, the piston assembly 100 is to be stopped.

In addition, the inner end of the bore 114 by the collision of the inner surface of the bore 114 or the crankshaft 116 of the large end 106 of the cone rod 104 of the piston 102 in the same principle as above or Damage to the crankshaft 116 and damage to the distal end 106 of the cone rod 104 are expected, thereby detecting whether the engine is defective by this and preventing the engine defect in advance.

In addition, the elastic member 146 provided in the pressure-sensitive portion 145 is a conventional spring is used, but any elastic member having a predetermined elasticity can be used by the user's convenience, any pneumatic or hydraulic pressure is not an elastic member It is possible to use a predetermined preload by.

(Second Embodiment of the Insertion Member According to the Present Invention)

Referring to the second embodiment of the insertion member according to the second embodiment of the piston supply apparatus according to the present invention in more detail as follows.

As shown in FIG. 8, the insertion member 240 includes a pressing part 241, a center compensating part 244, and a pressure part 246.

The pressing portion 241 is provided with a cylindrical shape having a lower diameter for the assembly of the piston 202, the indentation shaft 242 is extended to the upper to the coupling inside the center correction unit 244 It is driven up and down, the indentation shaft 242 is provided with at least one protruding step 243.

The center compensator 244 is formed of at least one center taper portion 245a having an outer side having a date and an inner side having a predetermined angle so as to protrude to the outside by the driving of the pressing portion 241 coupled to the lower portion. A center guide member 245 is provided, and at least three long holes 244b through which the center guide member 245 is guided are provided, and an upper portion of the center guide member 245 is fixed to the lower portion of the pressure unit 246.

The pressure unit 246 has a center correction unit 244 is coupled to the lower portion, the head portion 246a is provided with a coupling to the indentation shaft 242 provided in the pressing portion 241, the head portion A shaft 246b for transmitting the pressing force to the upper portion 246a is fixed to extend upward, and the hollow shaft portion 246c is fixed to the upper portion of the pressure portion 246, and the upper portion of the head portion 246a and the hollow shaft portion 246c. The elastic member 247 is provided at the lower part to be coupled in a state in which a preload is achieved to achieve a predetermined pressure.

A groove 249 recessed to a predetermined depth is further provided on the outer circumference of the center correction unit 244 and the center guide member 245, and an elastic ring 249a is coupled to the groove 249. The center guide member 245 is easily inserted by the elasticity of the elastic ring 249a when the center guide member 245 is inserted for return after the protrusion of the center guide member 245.

The press-fit shaft 242 and the head 246a and the shaft 246b are preferably fixed by mutual coupling by a mutual screw method, and may be fixed by mutual coupling by separate fixing pins.

In addition, the shaft 246b is inserted into the hollow shaft portion 246c fixed to the pressure unit 145 so that the shaft 246b is driven without interference of the hollow shaft portion 246c.

In addition, the pressure unit 246 is provided with a pressure measuring sensor 248 for measuring the pressure added to the piston 202 so that the insertion member 240 can measure the pressure input to press the piston 202. It is composed.

In addition, the elastic member 247 provided in the pressing part 246 is a conventional spring is used, but any elastic member having a predetermined elasticity by the user's convenience can be used any, pneumatic rather than elastic member It is possible to use a predetermined preload by the hydraulic pressure.

As shown in FIG. 9, when the centering jig 220 is transferred and positioned above the bore 214, the insertion member 240 descends by the hollow shaft part 246c as illustrated in FIG. 9. When a part of the lower part of the correction unit 244 is positioned to be inserted into the bore 214, the centering jig 220 descends to form a temporary seat on the door 214.

As described above, when the centering jig 220 descends, the pressing part 241 rises by the rise of the head 246a and the press-fit shaft 242 by the rise of the shaft 246b, and the press-press shaft 242. Protruding step 243 provided at the) pushes the center taper portion 245a outward and rises, and the center guide member 245 is guided to the long hole 244b by the push of the center paper portion 245a. Since the inner surface of the bore 214 and the inner surface of the piston guide hole 235 of the centering jig 220 coincide with each other, a center error correction of the centering jig 220 is achieved.

In addition, the elastic member 247 provided in the pressure unit 246 is compressed by the rise of the head 246a, and the pressure measuring sensor 248 detects this by the rise of the head 246a. The center error correction value of the centering jig 220 may be calculated.

As described above, the insertion member 240 that achieves the center error correction of the centering jig 220, the indentation shaft 242 and the pressing portion 241 to the original position by the lowering of the shaft 246b, the lowering of the indentation shaft 242 Since the protruding step 243 does not interfere with the center taper portion 245a and descends, the center guide member is formed by elasticity of the elastic ring 249a provided on the outer circumference of the center correction portion 244 and the outer side of the center guide member 245. 245 is easy to achieve the original position.

In addition, since the operation effect of the pressure measuring sensor 248 and the elastic member 247 of the pressure member 246 provided in the insertion member 240 is the same as the operation effect of the insertion member 240 according to the present invention, Description is omitted.

As described above, the piston assembling device according to the present invention achieves precise center error correction by the elastic center device, thereby smoothly assembling the piston when assembling the piston, and does not generate a small gap in the mating surface when the pistons are coupled to each other. Since damage to the provided piston ring can be prevented, there is an effect of preventing an engine defect in advance.

In addition, damage to the piston, piston ring, bore, crankshaft, and abnormalities can be detected in advance by measuring sensors, distance sensors, pressure sensors, etc., so that defects caused by piston assembly can be corrected. It works.

(First Embodiment of Piston Assembly Method According to the Present Invention)

13 is a flowchart illustrating a first embodiment of a piston assembly method according to the present invention. Referring to this, the first embodiment of the assembly method according to the present invention will be described in detail as follows.

In the piston assembling method according to the present invention, the step (S100) of supplying the piston to the piston supply jig is to wait to supply the piston to the bore provided in the engine block to supply the piston to the piston supply jig.

The step (S101) in which the engine block is supplied to the piston assembly device is to be supplied to the engine assembly device by an engine supply means (not shown) and to wait for the assembly of the piston.

As described above, in the step S100 in which the piston supply device waits and in step S101 in which the engine block is supplied and waiting, the step of inserting the lower guide into the engine block in step S102 is a lower part provided in the lower part of the engine assembly device. The guide rises and is inserted into the bore provided in the engine block so as to protrude upward. When the lower guide is raised, the center error of the lower guide is corrected by the first elastic center and the taper provided in the lower guide. To make an insertion.

As described above, in the step S102 in which the lower guide is inserted into the bore, the step S103 in which the piston supply jig is transferred to the upper part of the engine block is performed by inserting the piston into the bore to form an assembly of the piston. Is conveyed by the conveying means.

In the step (S103), the piston supply jig is transferred as described above, the position correction is made by lowering the piston supply jig, and the step (S104) of determining that it is seated on the engine block is guided to the taper of the lower guide when the piston supply jig is lowered. To achieve the center error correction, the coupling between the upper part of the bore and the state seated on the engine block is measured by a plurality of distance measuring sensors provided in the lower part of the piston supply jig to determine whether the poor coupling.

As described above, in the step S104 of determining whether the piston supply jig is poorly coupled, the poor coupling is measured by the distance measuring sensor, and the piston supply jig is raised to return to the previous step S103 to achieve the correct coupling.

In addition, if the correct coupling is achieved in the step (S104) of determining whether the piston supply jig is poorly coupled, the insertion member is lowered to assemble the piston of the piston supply jig (S105).

In the step S105 of inserting the lowering member, the piston provided in the piston supply jig is inserted into the bore of the engine block by pressing the piston by lowering the inserting member while the piston supply jig and the engine block form a precise coupling with each other. It is to achieve.

In addition, the step (S106) of determining whether the piston and the lower guide contact when the piston descends by the lowering of the insertion member, the upper end of the cone rod provided on the piston and the upper portion of the lower guide make contact with each other. It prevents damage to the inner surface of the bore, crankshaft and cone rod due to the rotation of the cylinder, and prevents bad assembly of the crankshaft and the large end of the cone rod due to the bad contact in advance. It is highly likely that defects will occur in the market.

In addition, the step of determining the defect of the engine block and the piston when assembling the piston by the insertion member (S107) is caused by a defect such as the bore and the like provided in the piston and the engine block in a state where the pressure portion provided in the insertion member made a predetermined preload. When a pressure higher than the pressure added to the pressure unit by the repulsive force is applied to the pressure unit, it is measured by a pressure measuring sensor provided inside the pressure unit, and the defect is likely to be carried out due to the high possibility of a defect in the bore provided in the piston and the engine block. .

Measuring the defective contact of the piston as described above (S106) and the step of taking out the defective product found in the step (S107) in which the defect by the pressure unit is measured (S108).

And if it is measured as normal in the step (S106) of measuring the poor contact of the piston and the step of measuring the defect by the pressure unit (S107), which is the piston assembly is normally assembled in the engine block is completed the next assembly process The engine block will be transported.

In addition, the piston assembly method according to the present invention is carried out repeatedly to achieve the assembly of the piston to the new engine block.

(Second Embodiment of the Piston Assembly Method According to the Present Invention)

14 is a flow chart showing a second embodiment of the piston assembly method according to the present invention, with reference to this second embodiment of the assembly method according to the present invention in detail as follows.

In the piston assembling method according to the present invention, the step (S200) of supplying the piston to the piston supply jig makes the supply of the piston to the piston supply jig and waits to supply the piston to the bore provided in the engine block. will be.

In the step S201 of supplying the engine block to the piston assembly device, the engine block is supplied to the engine assembly device by the engine supply means and waits for the assembly of the piston.

As described above, the centering jig is transferred to the upper part of the engine block at step S200 in which the piston supply device waits and in step S201 in which the engine block is supplied. The centering jig for assembling the piston is transferred. It is conveyed to the upper part of the engine block by means.

In step S202, the centering jig is transferred to the upper part of the engine block, and the insertion member descends after the correct position of the centering jig (S203). The centering jig is centered in a state where the upper part of the bore provided in the engine block is seated. The insertion member is lowered to coincide with the center of the jig and the bore so that the insertion member is positioned between the bore and the centering jig.

In the step S203 where the insertion member is positioned between the bore and the centering jig as described above, determining whether the insertion member is seated in the correct position after the centering jig error correction by the insertion member is performed (S204). The center guide member of the protruding to the center of the bore and the piston guide hole of the centering jig to the center guide jig position correction is made to be coupled to the upper bore.

In addition, the position correction of the centering jig is smoothly made by the third elastic center device provided in the centering jig, and the bore and the centering jig are measured by a plurality of distance measuring sensors provided under the centering jig.

As described above, if the defect comes out in the step of measuring the seating of the centering jig (S204), the centering jig is raised again to return to the previous step (S202) to achieve the position correction by the insertion member.

Then, in the step (S204) that the centering jig is seated on the upper bore, the step (S205) in which the piston supply jig is transferred to the upper centering jig, the piston is supplied to the upper centering jig to insert the piston into the bore to form the piston The jig is conveyed by the conveying means.

In the step (S205), the piston feed jig is transferred as described above, the position correction by the piston feed jig falling, and determining the combined with the centering jig (S206) is coupled to the upper centering jig when the piston feed jig is lowered Coupling step provided in the stepped part and the lower part of the piston supply jig is mutually coupled, and the center error correction of the piston supply jig to form a mutual coupling with the upper centering jig, and the state coupled with the centering jig is provided in the lower part of the piston supply jig It is determined by the distance measuring sensor of the defective coupling.

As described above, when the defective coupling is measured by the distance measuring sensor in the step S206 of determining whether the piston supply jig is poorly coupled, the piston supply jig is raised to return to the previous step S205 to achieve the correct coupling.

In addition, if the correct coupling is made in the step S206 of determining whether the piston supply jig is poorly coupled, the insertion member descends to assemble the piston of the piston supply jig (S207).

In the step S207 of inserting the descending member, the piston provided in the piston supply jig is inserted into the bore of the engine block by pressing the piston while the insertion member descends while the piston supply jig and the centering jig form a precise coupling with each other. To achieve.

In addition, the step (S208) of determining whether the piston and the lower guide contact when the piston descends by the lowering of the insertion member, the lower guide located at the lower part of the engine block when the piston descends makes the ascending, The upper part of the upper part and the lower guide contact each other to prevent damage to the inner surface of the bore, the crankshaft, and the cone rod due to the rotation of the cone rod. To prevent the defect in advance, and the defective contact with the piston and the engine block is likely to be taken out as a high probability of occurrence.

In addition, the step (S209) of determining the defects of the piston and the piston ring when the piston is assembled by the insertion member is a defect such as a bore or the like provided in the piston and the engine block in a state where the pressure portion provided in the insertion member has achieved a predetermined preload. When a pressure higher than the pressure added to the pressure unit is applied by the pressure unit due to the repulsive force, it is measured by a pressure measuring sensor provided inside the pressure unit. When pressure above a certain pressure occurs, a defect may occur in the bore of the piston and the engine block. This is high, so it is taken out.

As described above, the step of measuring the defective contact of the piston (S208) and the step of taking out the defective product proved in the step (S209) that the defect by the pressure unit is measured (S210).

And if it is measured as normal in the step (S208) of measuring the poor contact of the piston and the step of measuring the defects by the pressure unit (S209), which is normally the piston is assembled to the engine block, the piston assembly is completed, the next assembly process The engine block is transported.

In addition, the piston assembly method according to the present invention is carried out repeatedly to achieve the assembly of the piston to the new engine block.

As described above, only one embodiment for implementing the piston assembly and method of the engine assembly line according to the present invention, the present invention is not limited to the above-described embodiment, but the present invention as claimed in the claims Without departing from the gist of the invention, those skilled in the art to which the present invention pertains to the technical idea of the present invention to the extent that various modifications can be made.

1 is a cross-sectional view showing an elastic center device applied to the present invention.

Figure 2 is an assembled state cross-sectional view showing a first embodiment of the assembly apparatus according to the present invention.

3 is a cross-sectional view illustrating a state in which the lower guide of FIG. 2 is raised;

Figure 4 is a cross-sectional view showing a state in which the lower guide of Figure 3 is raised piston coupling jig.

Figure 5 is a cross-sectional view showing the state before the piston supply jig of Figure 4 is coupled to the bore and the piston is inserted into the bore by the insertion means.

6 is a cross-sectional view illustrating a state in which the piston is inserted into the bore and assembled by the insertion member of FIG. 5.

7 is a cross-sectional view of a use state illustrating a state in which a piston is supplied to a piston supply jig.

8 is an assembled state sectional view showing a second embodiment of the assembling apparatus according to the present invention;

9 is a cross-sectional view illustrating a state in which the centering jig of FIG. 8 is moved and positioned above the bore and the insertion member is lowered.

FIG. 10 is a cross-sectional view illustrating a state in which a centering jig and a bore are coupled to each other by an insertion member of FIG. 9.

11 is a cross-sectional view illustrating a state in which a piston supply jig is coupled to the settering jig of FIG. 9.

12 is a plan view schematically showing a state in which the lower guide according to the present invention is coupled to the bore.

13 is a flow chart showing a first embodiment of a piston assembly method according to the present invention.

14 is a flow chart showing a second embodiment of a piston assembly method according to the present invention.

Explanation of symbols on the main parts of the drawings

10: elastic center machine 12: upper support

14: lower support 16: elastic body

18: Limit 20: Position correction sensor

100,200: piston assembly device 102,202: piston

110,210: Engine block 112,212: Taper

114,214: Bore 120,250: Lower guide

122,252: arc part 124,254: taper part

126,256: settling groove 128,258: ascending means

129,259: measuring sensor 130,230: piston feed jig

131,221,231: conveying means 132,232: main body of supply jig

134,224,234: Piston guide hole 136,225: Coupling taper

137,226,237: Distance measuring sensor 138,238: Stop member

139,239: insertion groove 140,240: insertion member

142,241: Push 144,246: Head

145,246: pressure portion 146,247: elastic member

148,246b: Axis 149,248: Pressure measuring sensor

220: centering jig 222: centering jig body

223,236: coupling step 242: indentation shaft

243: protrusion step 244: center correction unit

244a: long hole 245: center guide member

245a: center taper portion 246c: hollow shaft portion

248: dragon groove 249a: elastic ring

Claims (11)

delete In the piston assembly of the engine assembly line for assembling the piston to the engine block, The piston assembly device of the engine assembly line, A lower guide 120 provided with a first elastic center device; Wow A piston supply jig 130 having a second elastic center device; And Inserting member 140 for assembling the piston to the engine block, The lower guide 120, A pair of circular arcs 122 having the same diameter as the bore inner diameter of the engine block is provided so as to extend to the upper part having a predetermined length, and the lower portion of the circular arcs 122 is fixed to the upper portion of the first elastic center device, The lower portion of the first elastic center device is configured to be fixed to the lifting means 128, and the measuring sensor 129 for determining whether the piston 102 is normally in contact with the upper portion of the arc portion 122 is an arc portion ( 122) The piston assembly of the engine assembly line, characterized in that provided on the top. delete delete delete delete delete delete In the piston assembly of the engine assembly line for assembling the piston to the engine block, The piston assembly device of the engine assembly line, Centering jig 220 which is seated on the upper bore of the engine rack; And A piston supply jig 230 having a second elastic center device; An insertion member 240 for assembling the piston to the engine block; And Located in the lower portion of the engine block, the lower guide 250 is provided with a first elastic center device; The lower guide 250, A pair of circular arcs 252 having the same diameter as the bore inner diameter of the engine block is provided to extend to the upper part to form a predetermined length, the lower portion of the circular arcs 252 is fixed to the upper portion of the first elastic center device, The lower portion of the first elastic center device is configured to be fixed to the lifting means 254, and the measuring sensor 256 for determining whether the piston 202 is normally in contact with the upper portion of the arc portion 252 is an arc portion ( 252) The piston assembly, characterized in that provided on the top. Supplying a piston to the piston supply jig (S100); Supplying an engine block to the piston assembly device (101); The lower guide is raised and inserted into the engine block (S102); A step (S103) of feeding the piston supply jig to the upper part of the engine block; Comprising a position correction by the piston supply jig falling, and determining that it is seated on the engine block (S104); Inserting member is lowered to assemble the piston of the piston supply jig (S105); Determining whether the piston contacts the lower guide when the piston descends by lowering the insertion member (S106); Determining a defect of the engine block and the piston when assembling the piston by the insertion member (S107); And a step (S108) of bringing out a defective product which is found to be defective. Supplying a piston to the piston supply jig (S200); Supplying the engine block to the piston assembly (S201); Transferring the centering jig to an upper portion of the engine block (S202); Inserting the lowering of the insertion member after the centering jig (S203); Determining whether the centering jig is inserted in the correct position after the centering jig error correction by the insertion member (S204); A step (S205) of feeding the piston supply jig to the centering jig; Position correction is made by the piston supply jig descending, and determining that the centering jig is coupled (S206); Inserting member is lowered to assemble the piston of the piston supply jig (S207); Determining whether the piston contacts the lower guide when the piston descends after the lower guide is raised (S208); Determining a defect of the engine block and the piston when assembling the piston by the insertion member (S209); The method of assembling the piston, characterized in that consisting of; (S210);

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