JP4010130B2 - Assembly apparatus and method for assembly oil ring - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a piston assembly oil ring assembly apparatus and method used in an internal combustion engine or the like.
[0002]
[Prior art]
A top ring, a second ring, and an assembly oil ring are fitted into the three piston ring grooves formed below the crown portion of the piston from the crown side, and the assembly oil ring includes upper and lower side rail rings ( Hereafter, it is comprised from 3 components which provided the spacer ring (henceforth, spacer) between side rails.
[0003]
Since each component of the assembly oil ring has a configuration cut out at the joint portion, it is easily elastically deformed in the radial direction and the vertical direction. When this is installed in a narrow piston ring groove, the piston must not be scratched, and care must be taken, resulting in a significant reduction in workability.
[0004]
For this reason, various automatic assembling apparatuses and methods have been proposed in the past. Of these, for example, the method shown in Japanese Patent Laid-Open No. 7-178629 covers the outer periphery of the piston and moves up and down in the axial direction. A spacer is attached to the bottom of the guide member provided on the top, and a pair of side rails are attached to the top. First, the bottom spacer is pushed out of the guide member and assembled into the piston ring groove. Each side rail is pushed out from the guide member by a pressing member and assembled.
[0005]
In this case, each component of the assembly oil ring is soft and easily deformed, so that the ends facing each other at the abutment portion overlap each other and may be detached from the piston ring groove. The engaging member is engaged with the joint portion and assembled in a state in which the displacement in the radial direction and the axial direction is restricted. Also, since the upper and lower side rails are thin and flat and easily adhere to each other, the regulation member is used to regulate the adhesion of the upper and lower side rails, and the pressing member is used to push the side rails using the upper and lower surfaces of the regulation member. Assembled.
[0006]
Normally, each part of the assembly oil ring must be assembled with the position of the joint part shifted from each other because it is necessary to prevent gas leakage due to the joint part communicating with each other. The side rail regulating members and the spacer regulating members must be distributed in three directions so as to face the joint portions of the respective parts.
[0007]
[Problems to be solved by the invention]
However, in this method, when assembling the spacer into the piston ring groove, when the spacer is pressed by the restricting member, or when assembling the side rail, a side rail restricting member having the same thickness as the outer peripheral portion of the spacer is provided. Since the side rail restricting member has an axial dimension, that is, the wall thickness must be the same as the spacer thickness. Therefore, it is necessary to switch to a side rail restricting member with a different thickness or to move the side rail restricting member in the vertical direction, which not only makes it difficult to work quickly, but also requires incidental equipment, increasing the cost of the equipment. There is a problem that leads to.
[0008]
The present invention was made in view of the above problems, and by using the spacer itself as a guide for mounting the side rail, even if the spacer has a different thickness, the regulating member is not switched or moved up and down. An object of the present invention is to provide a piston assembly oil ring assembly apparatus and method capable of assembling the assembly oil ring reliably and easily.
[0009]
[Means for Solving the Problems]
The object of the present invention is achieved by the following means.
[0010]
  (1) In an assembly device for assembling an assembly oil ring comprising a spacer and a pair of upper and lower side rails in the oil ring groove of the piston,
  A diameter-expanding member that expands the spacer and the pair of side rails and holds them in a laminated state;
  An extrusion member for extruding the spacer and the pair of side rails from the diameter-expanding member;
  Extruded by the extruding memberThe spacerFrom the expanded member to the pistonA spacer built-in part to be incorporated in the oil ring groove;
  The above-mentioned oil ring groove incorporatedSpacer outer surfaceofPress a part,SaidFrom the outer periphery of the pistonA part of the spacer protrudes to form a protrusion.Pressing means;
  One of the pair of side rails held by the diameter-expanding member is disposed so as to face a gap between the spacer and the upper wall or the lower wall of the oil ring groove.Positioning means for setting;
  The one or other side rail pushed out from the holding portion by the pushing memberOf the protrusionTop or bottomAs a guideSaidSide rail built-in part built into the oil ring groove,
An assembly device for an oil ring having a set.
[0011]
(2) The assembly device according to (1), wherein the pressing means uses a side rail joint portion regulating member that restricts the joint portions of the pair of side rails provided so as not to be deformed.
[0012]
(3) The pressing means uses a spacer joint portion restricting member for restricting the joint portion of the spacer so as not to be deformed, and one of the side rail joint portion restricting members. Assembly equipment.
[0013]
(4) The assembling apparatus according to any one of (1) to (3), wherein the pressing means presses the inner peripheral surface of the spacer until the inner peripheral surface contacts the bottom surface of the oil ring groove.
[0014]
(5) The assembly device according to (3), wherein the spacer joint portion regulating member is pressed so as to straddle the joint portion of the spacer.
[0015]
(6) The assembly device according to any one of (1) to (5), wherein each of the abutment portions of the spacer and the pair of upper and lower side rails has a predetermined phase difference in the circumferential direction.
[0016]
  In the assembly method of assembling an assembly oil ring consisting of a spacer and a pair of upper and lower side rails in the oil ring groove of the piston,
  SpacerAnd expanding the diameter of the pair of side rails to the expanded member and holding them in a stacked state, extruding one of the pair of side rails from the expanded member by the extruded member, and transferring to the side rail holder;
  The spacer extrudes the spacer from the diameter-expanding member by the extruding member, and the pistonA spacer assembling process to be incorporated in the oil ring groove;
The above-mentioned oil ring groove incorporatedSpacer outer surfaceofA part is pressed and deformed by pressing means,SaidA spacer deformation step for deforming a part of the spacer so as to protrude from the outer periphery of the piston;
  An alignment step of expanding the side rail by a diameter expanding member and setting the side rail at a position facing the gap between the spacer and the oil ring groove upper and lower walls;
  The protrusion of the spacer formed by deformation of the spacerTop or bottomThe guide as aboveOne or the otherSide railSaidSide rail assembly process to be incorporated in the oil ring groove,
Piston ring assembly consisting of the oil ring assembly method.
[0017]
【The invention's effect】
According to the first and seventh aspects of the present invention, the outer peripheral surface of the spacer is pressed by the pressing means, and a part of the spacer is deformed so as to protrude from the outer periphery of the piston. Is incorporated into the ring groove, the spacer itself can prevent the groove from being removed when the side rail ring is assembled, and when the different type spacer is incorporated as in the conventional example, the side rail ring joint portion regulating member can be switched, There is no need to move up and down, the assembly work is smooth, easy and reliable, and there is no need to increase incidental facilities unnecessarily, preventing equipment from becoming complicated and large, and suppressing an increase in capital investment. As a result, reduction in manufacturing cost can be promoted.
[0018]
In the inventions of claims 2 and 3, since the side rail joint part restricting member and the spacer joint part restricting member are used for the deformation of the spacer, it is possible to prevent an increase in incidental equipment and to prevent the apparatus from being complicated and large. The equipment cost and the manufacturing cost can be reduced.
[0019]
According to the invention of claim 4, when the spacer is deformed, if the inner circumferential surface of the spacer is pressed until it abuts against the bottom surface of the ring groove, the deformation of the spacer can be increased, so that the side rail ring can be assembled more smoothly and easily. And sure.
[0020]
According to the invention of claim 5, if the spacer joint portion regulating member is pressed so as to straddle the joint portion of the spacer, the easily deformable portion can be used. Therefore, the spacer can be deformed more easily, and the side rail ring can be assembled. Furthermore, it becomes smooth, easy and reliable.
[0021]
The invention of claim 6 can secure the sealing performance and lubricity of the piston after assembling the ring by providing a predetermined phase difference in the circumferential direction between the abutment portions of the spacer and the upper and lower side rail rings.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
[0023]
First, this embodiment will be outlined. In the present embodiment, as shown in FIGS. 17A, 17B, and 18, the third piston oil ring groove C of the piston P is used._ThreeThis is a case where the assembled oil ring K is assembled to a ring groove (hereinafter simply referred to as “ring groove”). The assembled oil ring K used here is a wave-shaped ring that is partially cut out and has an abutment portion Sa. Convex S₁And a spacer S having a ring groove C_ThreeWhen assembled to the convex portion S₁Ring groove C_ThreeUpper and lower side rails SR assembled to the gap G formed between the upper and lower walls Cu and Cd₁, SR₂It consists of and. These side rails SR₁, SR₂A part of the cut-off R₁a, R₂a.
[0024]
The assembly method of the assembly oil ring K will be briefly described. In FIGS. 1 and 2, first, the lower side rail SR housed in the magazine is used.₂, Spacer S and upper side rail SR₁Are collected in this order, stacked and held in an expanded state, while the piston P is set in the assembly oil ring K held in the expanded state.
[0025]
And ring groove C_ThreeAnd spacer S, align spacer S with ring groove C_ThreeThe spacer S is deformed so that it protrudes from the piston P using two of the spacer joint part restricting member 39 or the side rail joint part restricting members 53L and 53R (indicated by a broken line), and this projecting spacer Side rail SR with upper and lower surfaces Tu, Td of S protruding portion T as a guide₁, SR₂Is assembled into the gap G.
[0026]
In the present embodiment, three types of pistons P are provided with corresponding piston rings R (top rings R).₁, Second ring R₂, Which is a generic name of the oil ring K), as shown in FIG. 18, these are the outer diameter (D) of the piston, the third ring groove C farthest from the crown surface Pa of the piston P to the crown surface Pa._ThreePosition to the lower surface Cd (Lo) and side rail SR₁, SR₂The thickness (Br) of the spacer is the same, the thickness (Bs) of the spacer S, and the top ring R₁Ring groove C to be fitted₁Position (L1), second ring R₂Ring groove C to be fitted₂Position (L2), top ring R₁Thickness (B1) and second ring R₂Are different in thickness (B2).
[0027]
Furthermore, the assembly apparatus and method of the assembly oil ring K will be described in detail. First, the configuration of the entire assembly apparatus according to this embodiment will be described. 3 is a plan view of the assembling apparatus, and FIG. 4 is a schematic sectional view of FIG.
[0028]
The assembly apparatus generally includes a piston transport unit 10 that transports a piston P on a pallet 11 and various units that are provided adjacent to the piston transport unit 10 and that attach a piston ring R to the piston P. It is comprised from the attaching part 20 and the stock part 60 which stocks various piston rings R. As shown in FIG.
[0029]
<Piston transfer part>
Piston transport unit 10 has a lower base B₁A large number of pallets 11 are placed on a conveyor 12 erected on each side, and a piston P in a state where the crown surface Pa of the piston P is directed downward is installed on each pallet 11. In the present embodiment, the ring groove C formed at a position close to the crown surface Pa of the piston P.₁, C₂, C_ThreeSince the piston ring R is assembled to the piston P, the piston P is conveyed on the pallet 11 with the crown surface Pa facing down.
[0030]
Assembling the piston ring R starts with the ring groove C of the piston P._ThreeAssemble the oil ring K and then the second ring R₂, Top ring R₁Ring groove C₂, C₁In order of assembly.
[0031]
<Assembly>
The assembling part 20 picks up the piston P one by one from the take-out position I of the piston conveying part 10 and conveys it to the assembling position II of the piston ring, and grasps one set of the piston ring R and holds the piston. It has a ring chuck unit 22 for transporting to the ring assembly position II, a transport means 23 to which these units 21 and 22 are attached, and a diameter expansion unit 24 for expanding and pushing up the piston ring R. However, the spacer S is inserted into the oil ring groove C._ThreeSpacer built-in part U built in₁The side rail SR₁, SR₂The spacer S and oil ring groove C_ThreeAlignment means U for setting at a position facing the gap between the upper and lower walls Cu, Cd₂The pressing means U that protrudes from the piston P to form the protruding portion T_ThreeThe side rail SR with the upper and lower surfaces of the protrusion T as a guide₁, SR₂Oil ring groove C_ThreeSide rail built-in part U built in_FourIs configured by appropriately combining the units or the constituent members of the units.
[0032]
As shown in FIG. 5A, the piston chuck unit 21 has a slider 25, which is a uniaxial NC robot that operates in the vertical direction, attached to a conveying means 23. A frame 26 is attached to the slider 25 via a bracket. Installed.
[0033]
On the lower surface side of the frame 26, an air chuck 27 that clamps the outer periphery of the piston P with a plurality of claws 27 a, and a side rail holder 29 that is coaxially provided at a position closest to the piston P held by the air chuck 27. And a side rail pusher 30 and an air chuck 32 for clamping the side rail holder 29 with a plurality of claws 32a.
[0034]
The side rail holder 29 has one side rail SR on the lower surface.₁The ribs 29a are erected on the inner peripheral edge so as to hold the frame, and are supported by being urged downward by a spring 28 on a support shaft 31 suspended from the frame 26.
[0035]
The side rail holder 29 is a thin upper side rail SR.₁Is once received from the expansion unit 24 to be described later, and the ring groove C_ThreeSince the side rail pusher 30 is used for fitting after the positioning, the accuracy of the stop position becomes a problem. To increase the accuracy of the stop position, the side rail holder 29 is lifted and lowered while being securely held. Since it is preferable, it is held in a fixed position by a clamp air chuck 32 provided on the frame 26.
[0036]
The side rail pusher 30 is an upper side rail SR held together with the side rail holder 29.₁Ring groove C_ThreeAnd is attached to a support 33 standing on the frame 26 via an air cylinder 34 and a support bar 35 penetrating through the frame 26.
[0037]
Also, in the figure, on the right end side of the lower surface of the frame 26, a support column 36 is suspended, and a spacer joint portion overlapping prevention plate 37 and a spacer joint portion restricting member 39 are provided at the lower end of the support column 36. It is designed to work horizontally.
[0038]
The spacer joint portion overlapping prevention plate 37 enters the joint portion Sa of the spacer S and restricts the joint portions Sa of the spacers S so as not to overlap each other. The spacer joint portion regulating member 39 is a joint member of the spacer S. The portion Sa is suppressed from the outer periphery, and the deformation of the spacer S is restricted. As shown in FIG. 5C, the spacer joint portion overlapping prevention plate 37 has a plate thickness t of about 0.5 mm, and is a slit having a width W of about 1 mm formed in the spacer joint portion regulating member 39. 39a.
[0039]
In this embodiment, for example, a moving loader of a mechanism that drives a chain by a motor is used, and the piston chuck unit 21 is connected to a piston above the piston conveying unit 10. From the take-out position I to the assembling position II, the ring chuck unit 22 moves from the receiving position III for receiving the various rings R collected from the stock section 60 to the assembling position II, respectively. As shown in FIG. 6, the ring chuck unit 22 has a frame 43 attached to a movable loader 23 via a slider 42 that is a single-axis NC robot that operates in the vertical direction. An air cylinder 44 for raising and lowering is attached to the frame 43, and three chuck claws 46 for ring clamping are provided at the lower end of the air cylinder 44 via a known expansion mechanism 45. ing. The chuck claw 46 is received by expanding a piston ring R collected by a ring assembly unit 61 described later, and moves to the diameter expansion unit 24 to be reduced in diameter and delivered.
[0040]
As shown in FIGS. 5B and 7, the diameter expansion unit 24 receives a set of piston rings R collected by the ring chuck unit 22 and holds the piston ring R in a state larger than the outer diameter of the piston P. After that, the piston ring R is assembled together with the piston chuck unit 21 to the piston P loaded with the piston chuck unit 21.
[0041]
  Therefore, the diameter expansion unit 24 is provided coaxially with the axis 0-0 of the piston chuck unit 21 as shown in FIG.₁A horizontal support base 47 fixedly installed on top and an expansion / contraction mechanism 48 driven by air on the horizontal support base 47 so as to be able to expand and contract in the radial direction at equal intervals on the same circumference. A base 49 provided on the base 49, and a diameter-enlarging claw 50 which is integrally provided on the base 49 and receives a set of piston rings R from the ring chuck unit 22 and holds them in a diameter-expanded state. A push-up member 51 that pushes up the piston ring R held by the diameter-enlarged claw portion 50 and removes it from the diameter-enlarged claw portion 50;₁Side rail joint part regulating member attached to other support column 53 fixedly standing on the top52And have.
[0042]
  The piston P carried in by the piston chuck unit 21 has a crown Pa on the inner shoulder on the base 49.Surface 49aIn this case, the ring groove C extends from the crown surface Pa of the piston P._ThreeThe length to the surface (Lo) is set so that the height of the diameter-enlarged claw portion 50 matches. By doing so, the influence of the piston positioning variation in the pallet 11 of the piston transport section 10 can be eliminated here, and the accuracy of the upper end position of the diameter-enlarging claw section 50 and the piston groove position is also exactly obtained. The assembling work by the push-up member 51 can be performed very quickly and smoothly.
[0043]
  The push-up member 51 is a plate that is attached to a support column 56 via a slider 57 of a single-axis NC robot so as to be movable up and down. The push-up member 51 is placed on the ring receiving piece 54 and set outside the diameter-enlarging claw portion 50. Push up the piston ring R, remove it from the enlarged diameter claw 50, and attach it to the piston P. Therefore, the push-up member 51 includesThe piston ring R is larger than the outer diameter of the enlarged claw portion 50.Outside diameterA through hole 51a having a smaller inner diameter is established., ThroughOn the inner periphery of the hole 51a,A notch 51b for avoiding a collision with the ring receiving piece 54 is provided.
[0044]
As shown in FIG. 7, the side rail joint part regulating member 53 includes a pair of side rail joint part regulating members 53 </ b> L and 53 </ b> R arranged at a predetermined angle, and is positioned higher than the height of the diameter-enlarging claw part 50. , Mainly side rail SR fitted in ring groove C3₁, SR₂Joint part R₁a, R₂The side rail joint part regulating member 53 of this embodiment is not limited to this, but will be described in detail later, but presses the outer peripheral surface of the spacer S. It also has a function of deforming the spacer S in the ring groove C3. In any case, the air cylinder 55 is horizontally movable.
[0045]
Therefore, the spacer mounting portion U described above₁Is mainly composed of a spacer joint portion overlapping prevention plate 37 provided in the piston chuck unit 21, a spacer joint portion restricting member 39, and air cylinders 40, 41._ThreeThe spacer S is incorporated into the.
[0046]
Upper side rail SR₁Alignment means U₂Is mainly composed of an air chuck 27, a side rail holder 29 and a side rail pusher 30 provided in the piston chuck unit 21, and a lower side rail SR.₂Alignment means U₂Is mainly composed of the diameter-enlarging claw part 50 and the push-up member 51 of the diameter-expansion unit 24, and faces the gap G between the spacer S and the upper and lower walls Cu, Cd of the oil ring groove C3, respectively. Side rail SR₁, SR₂Will be set.
[0047]
These side rails SR₁, SR₂Embedded part U_FourIs mainly composed of a side rail holder 29, a side rail pusher 30, an air cylinder 34 and a support bar 35 provided in the piston chuck unit 21, a diameter expanding claw portion 50 and a push-up member 51 provided in the diameter expanding unit 24. Each side rail SR with the upper and lower surfaces of the projection T as a guide₁, SR₂Oil ring groove C_ThreeIt will be embedded in.
[0048]
Pressing means U of spacer S_ThreeIs mainly composed of either one of the spacer joint portion restricting member 39 of the piston chuck unit 21 and the side rail joint portion restricting members 53L and 53R of the diameter expanding unit 24, and a part of the piston is pressed by pressing the spacer S. A protruding portion T protruding from P is formed.
[0049]
<Stock Department>
As shown in FIGS. 3 and 4, the stock unit 60 has an upper base B of the apparatus.₂Magazine M (ring magazine M)₁, M₂, Spacer magazine Ms) and lower base B₁The ring assembly unit 61 is provided so that it can be conveyed vertically and horizontally.
[0050]
Magazine M has three types of top ring R₁Ring magazine M for three top rings stocked in layers₁And 3 types of second ring R₂Ring magazine M for three second rings stocked in layers₂And the side rail SR constituting the assembly oil ring K₁, SR₂Are stacked and stocked, and three spacer magazines Ms in which three types of spacers S are stacked and stocked.
[0051]
Ring magazine M₁, M₂As shown in FIG.₂The ring R on the outer periphery₁, R₂Is placed in a cylindrical magazine body 62 that is stacked and stocked, a supply cylinder 63 that is coupled to the lower end of the magazine body 62 and offset by a predetermined amount in the radial direction, and a step 64 of the magazine body 62 and the supply cylinder 63. The slicing member 65 is mainly configured to move the lowermost ring to the outer periphery of the supply cylinder 63 and drop it.
[0052]
The slicing member 65 is attached to the tip of the bracket 66, and a spring member 68 is provided between the bracket 66 and a fixing base 67 that slidably supports the bracket 66, and resists the resilience of the spring member 68. Thus, the ring is cut and returned. The slicing member 65 is driven by a pusher 87 provided in the ring assembly unit 61 described in detail later.
[0053]
The spacer magazine Ms is the ring magazine M.₁, M₂Unlike the shape of the spacer S, since it cannot be sliced and cut out horizontally from the lowermost end of the stack, the uppermost end of the stacked spacers S is pushed, and the spacer S one by one from the lowermost end. Is configured to extrude.
[0054]
In other words, the spacer magazine Ms has an upper base B as shown in FIGS.₂An index unit 71 is provided on a vertically movable air cylinder 70 provided at the center, and a central portion of an index base 72 is attached thereto, and three arms 73 are radially extended from the central portion, and each arm 73 has a cylindrical shape. The spacer magazine main body 74 is provided.
[0055]
The spacer magazine main body 74 also has a spacer S laminated on the outer peripheral portion. The spacer magazine main body 74 is integrally joined to a stand 76 with a spacer joint guide member 75 extending in the axial direction in a part of the circumferential direction. The stand 76 is held by being erected on the arm 73 of the index base 72.
[0056]
In the spacer magazine main body 74, a pair of spacer pressing pieces 77 are positioned horizontally so as to surround the periphery of the spacer magazine main body 37. The spacer pressing pieces 77 are attached to the stand 76. It is connected to an NC shaft 78 that moves up and down by a drive source (not shown) such as a servo motor via a bracket 79.
[0057]
When the spacer push-down piece 77 detects the upper end of the spacer S on which photoelectric sensors (not shown) are stacked while being lowered by the NC shaft 78, the spacer push-down piece 77 temporarily stops in contact with the upper end of the spacer S, and thereafter Only one thickness S is lowered, and only one spacer S is pushed out from the lower end of the spacer magazine main body 74. The lowering operation of the spacer S by one thickness is started when a photoelectric sensor (not shown) detects that a ring assembly unit 61 described later is positioned below the spacer magazine Ms. Whether the spacer magazine Ms is positioned above the ring assembly unit 61 is controlled by a control device (not shown).
[0058]
In this spacer magazine Ms, three types of spacer magazine main bodies 74 are provided on the arm 73 protruding from the index base 72. However, when a predetermined type of spacer S is pushed out, the other spacer magazine main bodies 74 are air-operated. Cylinder 70 causes the lower end of the magazine to₂It rises to a position where it does not interfere with it, descends after the index, and is ready for supply.
[0059]
  Index base72Four leaf springs 80 for holding the lowermost spacer S are arranged on the lower surface of the arm 73 to prevent the spacer S from dropping unnecessarily. A space 81 is provided in which a ring receiving member 85 of the ring assembly unit 61 described later can enter.
[0060]
As shown in FIG. 10, the ring assembly unit 61 collects a set of piston rings R from each magazine M and delivers them to the ring chuck unit 22.₁A moving unit 82 that moves vertically and horizontally, a lifting unit 84 provided on a support 82 c provided on the moving unit 82 via a slider 83, and a rotating unit 85 provided on the lifting unit 84; The ring receiving member 86 provided on the rotating portion 85 and the pusher 87 for dropping the piston ring R from the magazine M onto the ring receiving member 86 are provided.
[0061]
The moving part 82 has a lower base B₁It is composed of orthogonal two-axis NC robots 82a and 82b and a support table 82c provided on the upper surface, and this support table 82c is placed on one of the robots 82a and 82b.
[0062]
The slider 83 is provided for the convenience of delivery of the piston ring of the ring assembly unit 61.
[0063]
The elevating unit 84 has an air cylinder 91 mounted on a bracket 90 attached to the slider 83, and a support plate 93 is provided on the elevating rod 92 of the air cylinder 91.
[0064]
The rotating unit 85 includes a 60 ° swing actuator 85a placed on the support plate 93, a 120 ° swing actuator 85b placed on the actuator 85a, and 120 placed on the actuator 85b. ° The oscillating actuator 85c, and by providing the actuators 85a, 85b, 85c in a stacked state, the joints Sa, R of various rings falling on the ring receiving member 86₁a, R₂The positions a are in a predetermined angular relationship with each other.
[0065]
The pusher 87 is horizontally driven by an air cylinder 87 a provided at the upper end of a support column 94 erected on the support plate 93, and the magazine M₁The slicing member 65 such as the like is pushed through the bracket 66 against the spring 68 to cut out the lowermost ring stacked on the magazine main body 62.
[0066]
  The ring receiving member 86 is a member in which a columnar main body 96 whose outer peripheral surface is partially tapered is erected on a support plate 95 placed on a 120 ° swing actuator 85c. As shown in FIG. 11, 96 is provided with three notches 96 a into which the three chuck claws 46 of the ring chuck 22 are inserted. These notches 96a are formed at a position of 60 ° and a position of 180 ° distributed from the ring abutment portion, and the claw of the ring chuck 22 is formed.46Is smoothly expanded so that the piston ring R can be gripped.
[0067]
The ring assembly unit 61 of this embodiment is a top ring magazine M.₁Second ring magazine M₂The side rail magazine Msr, the spacer magazine Ms, and the side rail magazine Msr are moved again to take in the ring from each magazine M.
[0068]
Next, the operation will be described.
[0069]
<Uptake of ring>
When a ring assembly of a predetermined piston P is instructed from a control unit (not shown), the ring assembly unit 61 first applies a corresponding top ring by the orthogonal biaxial NC robots 82a and 82b of the moving unit 82 in FIG. Magazine M₁The ring assembly unit 61 and the pusher 87 are raised by the air cylinder 91. When the ascending limit is reached, the pusher 87 is in a position facing the bracket 66 (position indicated by an imaginary line in FIG. 8), and the ring receiving member 96 of the ring assembly unit 61 is attached to the top ring magazine M.₁It will be located directly below.
[0070]
  Here, the air cylinder 87a of the pusher 87 is operated, and the slicing member 65 moves forward, and the top ring magazine M₁The lowest top ring R supported on the cradle 62a₁Cut outTheOne ring is transferred from the magazine body 62 to the supply cylinder 63, dropped along the outer periphery of the supply cylinder 63, and taken out on the support plate 95 of the ring receiving member 96.
[0071]
  Next, the ring assembly unit 61 includes the corresponding type of second ring magazine M.₂The 120 ° swing actuator 85b is activated during this movement, and theTheRing R₁Joint part R₁a and next second ring R₂Joint part R₂a causes a phase shift of 120 °.
[0072]
  In this way, the ring assembly unit 61 becomes the second ring magazine M.₂The top ring R₁Second ring R in the same way as₂And cut the top on the support plate 95.TheRing R₁Second ring R on₂Is placed.
[0073]
Second ring R₂After taking out the ring assembly unit 61, the lower side rail SR₂Move to take out. Also during this movement, the phase of the abutment is shifted as in the previous case. Side rail SR from the side rail magazine₂Is cut out in the same procedure as the previous one.
[0074]
Lower side rail SR₂, The ring assembly unit 61 moves below the spacer magazine Ms. During this movement, the 120 ° swing actuator 85c is actuated to form a joint portion that is shifted by 120 ° from the joint portion of the side rail SR2. Like that.
[0075]
In this spacer magazine Ms, the corresponding type of spacer S is moved to a predetermined take-out position by the operation of the index unit 71, so that the spacer S is received here. This reception is performed when the ring assembly unit 61 is positioned directly below the spacer magazine Ms, and the ring receiving member 96 enters the space 81 of the spacer magazine Ms as shown in FIG. When the photoelectric sensor detects it, the servo motor or the like is thereby rotated, and the spacer pressing piece 77 is lowered by the thickness of the spacer S by the NC shaft 78.
[0076]
Since the spacer push-down piece 77 descends the uppermost spacer S downward by a stroke corresponding to one thickness of the spacer S, only one spacer S is pushed out from the lower end of the spacer magazine main body 74, and the ring Lower side rail SR of collective unit 61₂Placed on top.
[0077]
Lower side rail SR₂When the spacer S is placed on the ring assembly unit 61, the ring assembly unit 61 moves again below the side rail magazine Msr, and the upper side rail SR is placed on the spacer S in the same manner as described above.₁Receive.
[0078]
When one set of piston ring R is taken into the ring assembly unit 61 in this way, the take-in of the piston ring R is completed (step 1).
[0079]
<Ring delivery>
The ring assembly unit 61 that has taken in one set of piston ring R is moved from the stock unit 60 to the assembly unit 20 by the moving unit 82, and reaches the receiving position III in FIG.
Here, after the ring chuck unit 22 is lowered by the air cylinder 44, the chuck claw 46 enters the notch 96a of the ring receiving member 96, slightly expands the inner diameter of the piston ring R, and receives all the piston rings R. Ascend (step 2).
[0080]
Next, the ring chuck unit 22 moves right by the transfer loader 23, stops at the assembly position II in FIG. 3, descends by the air cylinder 44, and reaches the diameter expansion claw portion 50 of the diameter expansion unit 24.
[0081]
Here, the chuck claws 46 of the ring chuck unit 22 enter between the diameter-enlarged claw portions 50 of the diameter-expansion unit 24, so that they do not interfere with each other. Since the outer diameter is smaller than the outer diameter formed by the chuck claw 46, the chuck claw 46 enters the diameter-enlarging claw part 50 of the diameter-expansion unit 24, and all the piston rings R that are held are expanded-diameter claw part 50. Can be handed over to.
[0082]
Therefore, when the ring chuck unit 22 reaches the ring receiving piece 54, the chuck pawl 46 is slightly reduced in diameter and places all the piston rings R on the ring receiving piece 54 (step 3).
[0083]
After this transfer, the ring chuck unit 22 closes the chuck claw 46, rises and waits. In the diameter expansion unit 24, the three diameter expansion claw portions 50 expand to hold the piston ring R (state shown in FIG. 12).
[0084]
<Piston uptake and set>
On the other hand, in the piston transport section 10, the pallet 11 on which the piston P with the crown surface Pa facing down is placed at the take-out position I and stopped.
The piston chuck unit 21 moves to the take-out position I by the right line of the transfer loader 23, the air chuck 27 is lowered by the operation of the slider 25, and the piston P is grasped and lifted by clamping here, and the transfer loader 23. To the assembly position II (step 4).
The air chuck 27 is lowered again by the operation of the slider 25, and the air chuck 27 is unclamped slightly before the crown surface Pa of the piston P hits the shoulder surface 49a on the inner side of the diameter-enlarging claw 50, and the diameter of the piston P is increased. It is placed on the shoulder surface 49a inside the claw portion 50 (step 5). Note that in the diameter expansion unit 24, the piston ring R is in an expanded state, and the piston P descends inside this.
[0085]
Here, the dimension from the inner shoulder surface 49a of the enlarged diameter claw 50 to the upper end of the enlarged diameter claw 50 is the position dimension (Lo) from the piston crown surface Pa to the surface far from the crown surface of the ring groove. Since it is processed so as to be the same, the influence of the piston positioning variation in the pallet 11 of the piston transport unit 10 can be eliminated here, and the accuracy of the upper end position of the enlarged diameter claw part 50 and the piston groove position is also exactly. Is issued.
[0086]
Further, after the piston P is set, the slider 25 is operated to further lower the piston chuck unit 21, and as shown in FIG. 12, the lower end rib 29a of the side rail holder 29 and the upper end of the diameter expanding claw portion 50 are brought into contact with each other. (Step 6).
[0087]
By this contact, the piston chuck unit 21 side and the diameter expanding unit 24 are connected, and the side rail holder 29 on the piston chuck unit 21 side has a ring groove C of the piston P at the lower end position._ThreeThe position of the side rail is precisely matched, the accuracy when attaching the side rail is extremely high, and the side rail installation work is also extremely smooth.
[0088]
Further, after the side rail holder 29 and the diameter-enlarging claw 50 are brought into contact with each other, when the piston chuck unit 21 is lowered by about 1 mm, the lowering is stopped, and the piston clamping air chuck 27 and the side rail holder clamping air are stopped. The chuck 32 is actuated to clamp the piston P and the side rail holder 29 (step 7). As a result, the accuracy of the position of the lower end of the side rail holder 29, that is, the position of the lower end of the rib 29a and the position of the ring groove of the piston P is exactly obtained.
[0089]
<Transfer of one side rail>
When the side rail holder 29 and the diameter expansion claw 50 are in contact with each other, the ring push-up plate 51 is moved upward by the slider 57 of the single-axis NC robot of the diameter expansion unit 24 to expand the diameter. Upper side rail SR on the top of the piston ring that is stacked around the claw 50₁Is transferred to the side rail holder 29 (step 8).
[0090]
<Assembly of spacer>
Next, the slider 25 of the single-axis NC robot of the piston chuck unit 21 is operated, and the piston P is inserted into the ring groove C via the frame 26 and the air chuck 27._Three(Step 9). As a result, the contact between the side rail holder 29 and the enlarged diameter claw portion 50 is also released, so that the spacer built-in portion U₁Using spacers, insert the spacer S into the oil ring groove C_ThreeCan be incorporated within. In this case, the ring groove C of the piston P_ThreeIs a position facing the spacer joint portion overlapping prevention plate 37 (state shown in FIGS. 13A and 13B).
[0091]
Here, the air cylinder 40 is operated, and the spacer abutting portion overlap prevention plate 37 is attached to the ring groove C._Three(Step 10), the ring push-up plate 51 is lifted by the slider 57, and the uppermost spacer S of the remaining piston ring existing in the diameter-enlarging claw 50 is moved upward. Ring groove C while being guided by joint overlap prevention plate 37_Three(Step 11).
[0092]
In addition, when there is no spacer joint part overlap prevention plate 37, as shown in FIG. 14A, there is a possibility that the end part of the spacer joint part Sa is overlapped. When the spacer joint portion overlap prevention plate 37 is assembled as in the present embodiment, as shown in FIG. 14B, the end portion of the spacer joint portion Sa is the spacer joint portion overlap prevention plate 37. Therefore, the overlapping state of the end portions is surely prevented.
[0093]
<Preparation of side rail assembly>
  After assembly of spacer S, side rail SR₁, SR₂Prepare for assembly. As this preparation, pressing means U_ThreeBy pressing a part of the outer peripheral surface of the spacer S so that a part of the spacer S protrudes from the outer periphery of the piston P.ShapeIt is to let you.
[0094]
That is, the air cylinder 40 for the spacer joint portion restricting member 39 of the piston chuck unit 21 is operated to move the spacer joint portion restricting member 39 toward the spacer joint portion Sa.
[0095]
In this case, as shown in FIG. 15, it is preferable to adjust the position of the spacer joint portion regulating member 39 so that the gap between the spacer S and the piston groove bottom Co is eliminated, and the spacer joint portion overlapping prevention plate 37 is also provided. It is preferable to retract from the ring groove C3 (step 12).
[0096]
Then, the spacer abutting portion restricting member 39 is brought into contact with the spacer abutting portion Sa (step 13), and at the same time, one air cylinder 55 for the side rail abutting portion restricting member 53 provided in the diameter expanding unit 24 is provided. Actuates and moves one side rail joint portion regulating member 53L toward the outer peripheral surface of the spacer S (step 14).
[0097]
In this case, one side rail joint portion regulating member 53L of the two side rail joint portion regulating members 53 provided in FIG. 7 is adjusted in position so that there is no gap between the spacer S and the piston groove bottom Co, The other side rail joint portion regulating member 53R is adjusted so that it does not contact the outer peripheral portion of the spacer S as shown in FIGS. Thereby, one side rail joint part regulating member 53L comes into contact with the outer circumferential surface of the spacer S, and the other side rail joint part regulating member 53R does not come into contact with the outer circumferential surface of the spacer S. The piston P is deformed so as to protrude outward (step 15).
[0098]
In addition, a part of the spacer S is deformed, and the ring groove C_ThreeIn the present embodiment, in order to project the spacer S to the outside more reliably, two joint part restricting members, the spacer joint part restricting member 39 and the side rail joint part restricting member 53L, are used in the present embodiment. In addition to this, a part of the spacer S is made into the ring groove C._ThreeAny one of the spacer joint portion restricting member 39 and the side rail joint portion restricting members 53L and 53R may be used as long as it can be projected to the outside.
[0099]
<Assembly of side rail>
  In this way, a part of the spacer S is deformed and the ring groove C_ThreeWhen it is projected to the outside, the positioning means U₂Side rail SR₁The spacer S and the ring groove C_ThreeSet at a position facing the gap G between the upper and lower walls Cu, Cd. Side rail pusher of piston chuck unit 2130forofActuate air cylinder 34, side rail holder 29 and side rail pusher30Upper side rail SR held on both₁Side rail pusher30Press down to align.
[0100]
  AndAnd aboveSide rail SR₁Side rail pusher30Pressed byGerutoThe extended upper side rail SR₁Is reduced in diameter and guided by the upper surface Tu of the protrusion T of the spacer S, and the upper surface Tu of the spacer S and the convex S₁Are incorporated into the gap G formed by the
[0101]
Upper side rail SR₁At the same time, the slider 57 of the single-axis NC robot of the diameter expansion unit 24 is further operated, and the remaining ring SR expanded in diameter by the diameter expansion claw 50₂, R₂, R₁Is lifted by the ring push-up plate 51, and the top lower side rail SR₂Are pushed up, aligned, and guided by the lower surface Td of the spacer S.₁(Step 16).
[0102]
Upper and lower side rail SR₁, SR₂Is completed, when the two abutment restricting members 39 and 53L are retracted, the spacer S is moved into the ring groove C._ThreeReturn to the side rails SR₁, SR₂Is assembled in the ring groove C3.
[0103]
Next, when the air cylinder 34 for the side rail pusher 15 and the air cylinder 41 for the spacer joint portion regulating member 39 are operated and returned to the return ends, the assembly of the assembly oil ring K is completed (step 17).
[0104]
<Assembly of the second ring>
The second ring is assembled by operating the slider 25 of the single axis NC robot of the piston chuck unit 21 to raise the piston P by the width of the second ring groove, and then moving the slider 57 of the single axis NC robot of the diameter expanding unit 24. The remaining ring R that is further operated and expanded in diameter by the expanded diameter claw 50₂, R₁Is lifted by the ring push-up plate 51, the second ring R on the top₂Is ring groove C₂(Step 18).
[0105]
<Top ring assembly>
Top ring R₁Assembling is performed by operating the slider 25 of the 1-axis NC robot of the piston chuck unit 21, raising the piston P by the width of the top ring groove, and further operating the slider 57 of the 1-axis NC robot of the diameter expanding unit 24. The last top ring R that has been expanded by the expanded claw₁Is lifted by the ring push-up plate 51, the top ring R₁Is ring groove C₁(Step 19).
[0106]
<Piston return>
Finally, the slider 25 of the single-axis NC robot of the piston chuck unit 21 is operated, the piston P is lifted to the rising end, the diameter-enlarging claw portion 50 of the diameter-expansion unit 24 is closed, and preparation for receiving the next piston ring is performed. When the transfer loader 23 is moved to the right, the piston chuck unit 21 is lowered at the take-out position I, the piston P is returned to the waiting pallet 11, unclamped and raised, and the ring assembly is completed (step 20). ).
[Brief description of the drawings]
FIG. 1 is a schematic explanatory diagram of a main part of an embodiment.
FIG. 2 is a cross-sectional view taken along line 2-2 of FIG.
FIG. 3 is a schematic plan view showing the apparatus of the embodiment.
FIG. 4 is a schematic sectional view showing the apparatus of the embodiment.
5A is a cross-sectional view of a piston chuck unit, FIG. 5B is a schematic cross-sectional view of a diameter expansion unit, and FIG. 5C is a plan view showing a spacer joint portion overlapping prevention plate and a spacer joint portion regulating member.
FIG. 6 is a schematic sectional view showing a ring chuck unit.
FIG. 7 is a schematic plan view showing the relationship between the diameter expanding unit and each abutment restricting member.
FIG. 8 is a schematic sectional view of a ring magazine.
9A is a schematic cross-sectional view of a spacer magazine, and FIG. 9B is an arrow view along the line BB in FIG. 9A.
FIG. 10 is a side view of the ring assembly apparatus.
FIG. 11 is an explanatory plan view of a main part of the ring assembly apparatus.
FIG. 12 is an operation state explanatory diagram of the embodiment.
FIG. 13A is an explanatory diagram of an operation state of the embodiment, and FIG. 13B is a plan view thereof.
14A is an explanatory view exemplarily showing a spacer joint portion regulating member state, and FIG. 14B is an explanatory diagram showing a restriction state by the spacer joint portion regulating member.
FIG. 15 is a sectional view showing a spacer deformation state.
FIG. 16 is a flowchart showing an operating state of the present embodiment.
17A is an exploded perspective view of the assembly oil ring, and FIG. 17B is an enlarged perspective view of the main part of the spacer.
FIG. 18 is a schematic cross-sectional explanatory view showing an example of a piston used in the present embodiment.
[Explanation of symbols]
10: Piston transport section,
21 ... Piston chuck unit,
22 ... Ring chuck unit,
23 ... conveying means,
24 ... Diameter expansion unit,
29 ... Side rail holder,
39 ... Spacer joint part regulating member,
49 ... the base,
49a ... inner shoulder,
50 ... Diameter-enlarging nail (Expanded member),
51. Push-up member,
60 ... stock club,
C_Three... ring groove,
Cd ... the lower wall of the ring groove,
Cu: The upper wall of the ring groove,
K ... Oil ring,
Lo: Length from the crown surface of the piston to the surface of the ring groove C3,
P ... piston,
Pa ... crown surface,
R ... Piston ring,
R₁... top ring,
R₂... second ring,
R₁a, R₂a ... Side rail joint,
S: Spacer,
Sa: The abutment part of the spacer,
S: Spacer protrusion,
S: Upper and lower surfaces of the protruding portion of the spacer,
SR₁… Upper side rail,
SR₂… Lower side rail,
T: Projection of spacer S,
Td: the lower surface of the protrusion,
Tu ... the upper surface of the protrusion,
U₁... Spacer built-in part,
U₂... Alignment means,
U_Three... Pressing means,
U_Four... side rail built-in part.

Claims (7)

In the assembly device for assembling the assembly oil ring composed of a spacer and a pair of upper and lower side rails in the oil ring groove of the piston,
A diameter-expanding member that expands the spacer and the pair of side rails and holds them in a laminated state;
An extrusion member for extruding the spacer and the pair of side rails from the diameter-expanding member;
A spacer assembling portion for incorporating the spacer pushed out by the pushing member into the oil ring groove of the piston from the diameter-expanding member ;
A pressing means for forming the part of the outer peripheral surface of the spacer incorporated in the oil ring groove to press the projecting portion is projected a part of the spacer than the outer circumference of the piston,
Alignment means for setting one of the pair of side rails held by the diameter-expanding member so as to face a gap between the spacer and the upper wall or the lower wall of the oil ring groove ;
A side rail embedded portion incorporating said one extruded from the holder by pushing member or the other of the side rail as a guide the upper or lower surface of the projecting portion in the oil ring groove,
An assembly device for an oil ring having a set.   The assembling apparatus according to claim 1, wherein the pressing means uses a side rail joint portion regulating member that restricts the joint portions of the pair of side rails provided so as not to be deformed.   The group according to claim 1, wherein the pressing unit uses a spacer joint portion restricting member that restricts the joint portion of the spacer so as not to be deformed, and any one side rail joint portion restricting member. Attachment device.   The assembling apparatus according to any one of claims 1 to 3, wherein the pressing means presses the inner peripheral surface of the spacer until the inner peripheral surface contacts the bottom surface of the oil ring groove.   The assembly apparatus according to claim 3, wherein the spacer joint portion regulating member is pressed so as to straddle the joint portion of the spacer.   The assembly apparatus according to claim 1, wherein each of the abutment portions of the spacer and the pair of upper and lower side rails has a predetermined phase difference in the circumferential direction. In the assembly method of assembling an assembly oil ring consisting of a spacer and a pair of upper and lower side rails in the oil ring groove of the piston,
The step of holding the spacer and the pair of side rails in a diameter-expanded member in a laminated state, extruding one of the pair of side rails from the diameter-expanding member by an extruding member, and transferring to the side rail holder;
A spacer assembling step for extruding the spacer from the diameter-expanding member by the extruding member and incorporating it in the oil ring groove of the piston ;
A spacer modification step of pressing deformation, are deformed so as to protrude from the outer periphery of the piston part of the spacer by pressing means a part of the outer peripheral surface of the spacer incorporated in the oil ring groove,
An alignment step of expanding the side rail by a diameter expanding member and setting the side rail at a position facing the gap between the spacer and the oil ring groove upper and lower walls;
And side rails built step of incorporating the one or the other of the side rail to the upper surface or lower surface of the protruding portion of the spacer formed by the deformation of the spacer as a guide to the oil ring groove,
Piston ring assembly consisting of the oil ring assembly method.

Images