CN101304853A - Method and device for manufacture of connecting rod - Google Patents

Abstract

A device for manufacturing a connecting rod comprises a fixed stage (62) secured onto a base (60), a movable stage (64) so installed as to be move close to and apart from the fixed stage (62), and a set of backup cylinders (153, 155) displacing the overall movable stage (64) along the axial direction of the connecting rod (30). The set of backup cylinders (153, 155) are substantially simultaneously biased to displace a cap part (32) together with the movable stage (64) until the fractured surface of the cap part (32) of the connecting rod abuts on the fractured surface of the rod part (34) of the connecting rod held on the fixed stage (62). Consequently, the removal and release of chips produced on the mating fractured surfaces can be promoted.

Description

Be used to make the method and apparatus of connecting rod

Technical field

The present invention relates to be used to make method and apparatus (device) as the connecting rod of vehicle motor member, relate more specifically to the connecting rod that has big end and small end by forming, big end parts is cleaved into cap member and rod unit and utilizes the fastening force of pair of bolts by the control bolt that cap member and rod unit are connected to each other and make the method and apparatus of connecting rod.

Background technology

In vehicle motor, extensively adopt the connecting rod that piston pin is connected with crank-pin.Connecting rod has big end that is connected to crank-pin and the small end that is connected to piston pin.In order to make connecting rod, arrive small end by the big end of integrally formed connecting rods such as for example forging usually, then big end parts is cleaved into cap member and rod unit.

As Figure 27 of accompanying drawing and shown in Figure 28, make connecting rod 1: forge integratedly and comprise the rod unit 6 that is combined into one mutually and the workpiece of cap member 7 by following process; Along groove C workpiece splitting is become rod unit 6 and cap member 7; By pair of bolts 9a, 9b being screwed in the bolt hole 8 and securely connecting rod parts 6 and cap member 7 then.

Connecting rod 1 has: small end 4 is limited with the first less through hole 2 of diameter therein; With big end 5, it is positioned to axis along connecting rod 1 away from small end 4, is being limited with second through hole 3 of diameter greater than first through hole 2 in big end 5.

The big end 5 of connecting rod 1 is gone up along groove C in the direction (Y represents by arrow) perpendicular to vertical (the arrow X by Figure 27 represents) of connecting rod 1 and is crossed 3 divisions of second through hole in substantial middle, thereby connecting rod 1 is divided into rod unit 6 and cap member 7.Rod unit 6 has along the plane of disruption of groove C, and cap member 7 also has along the plane of disruption of groove C.Because these planes of disruption are complementary mating surfaces, so when by bolt 9a, 9b with rod unit 6 and cap member 7 when secured to one another, the plane of disruption of the plane of disruption of rod unit 6 and cap member 7 fitly keeps closely contacting each other, thereby rod unit 6 and cap member 7 can be assembled accurately each other.

By with in bolt 9a, the 9b inserting bolt hole 8 so that the external threaded surface of the interior threaded surface of bolt hole 8 and bolt 9a, 9b each other threaded engagement engage, thereby rod unit 6 and cap member 7 are connected to each other.

Bolt hole 8 forms in rod unit 6 and cap member 7 simultaneously, because bolt hole 8 formed before 5 divisions of big end.Therefore, bolt hole 8 needn't be respectively formed in rod unit 6 and the cap member 7, and the mating surface of rod unit 6 and cap member 7 needn't be processed as smooth burnishing surface.

A kind of method that divides connecting rod is for example disclosed in Japanese patent laid-open 10-277848 communique, this method may further comprise the steps: the support holes that is provided in link supporting spare applies the interior pressure load device of outside interior pressure, and a pair of outer pressure load device that is used for applying to this supporting member external pressure is set; From described a pair of outside pressure load device apply external pressure and apply interior pressure to supporting member to supporting member from interior pressure load device; And when the interior pressure that imposes on supporting member from interior pressure load device was able to divide the level of supporting member, abrupt release was from the external pressure of outer pressure load device, thereby the enough moment divisions of pressure energy supporting member in making.

The Japan Patent spy opens the equipment that the 2002-066998 communique discloses a kind of connecting rod that is used to rupture, this equipment comprises: first and second support members that are used for the horizontal support connecting rod, this first and second support member is arranged in the base portion of the supporting plate (pallet) that is used for placing connecting rod thereon, and can move along direction away from each other; Subdivision axle with half axle, described half axle is vertically mounted on first and second support members, and has the corresponding outer peripheral face that is used for against the respective inner surfaces of peristome; Wedge, it has against the conical surface of the end face of facing mutually of half axle, is used to make half axle evenly to separate away from each other and expansion; Be used for actuator to the wedge imposed load; And control circuit, it is used for applying initial load so that half axle against the respective inner surfaces of peristome, applies breaking load afterwards and makes peristome moment fracture to actuator.

For example Japanese patent laid-open 06-042527 communique has disclosed a kind of equipment, this equipment is used for by being assemblied in direction that a pair of half-cylindrical projection in the hole that connecting rod tip portion limits is separated from each other and applying equal disruptive force to the axial opposite side of this double cylindrical projections and divide connecting rod along making, thereby the hole in the big end that prevents to divide is twisted.

The Japan Patent spy opens clear 64-064729 communique and discloses a kind of method, forms a pair of recess in the inner peripheral surface in the hole of this method in connecting rod tip portion, and along the fracture plane based on described recess connecting rod is split into cap member and rod unit.

The Japan Patent spy opens 2003-512522 communique (PCT) and discloses a kind of processing method of preventing that removable cohesive material particle from unnecessarily falling from the plane of disruption of being used to.According to disclosed this processing method, after connecting rod cracking is rod unit and cap member, bolt is installed on rod unit and the cap member, then it is unscrewed.Making described parts, tight a bolt with after the preset frequency vibration.

According to disclosed splitting method in the Japanese patent laid-open 10-277848 communique because the deviation that the foozle of connecting rod causes, be difficult to control detect press in the division and abrupt release from the timing of the external pressure of outer pressure load device.

The Japan Patent spy opens the disclosed fracture equipment of 2002-066998 communique often can not limit the level vibration that produces when big broken end becomes cap member and rod unit fully.Fracture formerly about shortening on one of division zone and the time lag between the follow-up fracture on another zone are very difficult.

Connecting rod is categorized as above-mentioned connecting rod and the assembling connecting rod of dividing.The assembling connecting rod is by producing rod unit and cap member respectively, with pair of bolts rod unit and cap member linked into an integrated entity then and makes (referring to Japanese patent laid-open 11-002230 communique).

Assembling rod unit and the cap member of connecting rod by producing big end respectively is assembled into one with pair of bolts with bar and cap then and makes.A plurality of alignment pins in the pin-and-hole by being assemblied in rod unit respectively and the pin-and-hole of cap member make cap member with respect to the rod unit hi-Fix.

Yet, after forging rod unit and cap member respectively, must in rod unit and cap member, form bolt hole, the mating surface with rod unit and cap member is processed into smooth burnishing surface then.Therefore, the production and assembly connecting rod is longer required man-hour, thereby has hindered the raising of production efficiency.

Can divide connecting rod and not adopt the alignment pin that uses on the assembling connecting rod.When the complementary fit face of the division of rod unit and cap member keeps abutting against each other, must make the mating surface joint that accurately is fitted to each other.

When rod unit and cap member combination with one another were integral, if the complementary fit face of the division of rod unit and cap member is destructurized, mating surface just can not provide positioning function so, and produces modification space between rod unit and cap member.As a result, may produce noise and may the circularity in the hole in the big end being had a negative impact.

When connecting rod was split into cap member and rod unit, rod unit and cap member can shrink owing to the residual stress that the division back produces.Consider this contraction, the plane of disruption of cap member and the plane of disruption of rod unit recombination region connected to one another territory comprise the step that non-planar surface produces by the uneven surface that is fitted to each other.Cap member and rod unit may extend (expansion) rather than contraction owing to the residual stress that the division back produces.

Because the residual stress that rod unit and cap member all produce owing to the division back is shunk (usually, cap member shrinks manyly than rod unit), so when the plane of disruption of the plane of disruption that makes cap member and rod unit is fitted to each other joint, thereby they misplace and can not accurately be fitted to each other owing to shrinking.

Attempted the recess of waiting to divide a pair of V-arrangement of formation cross section in the zone in the interior perimeter surface of connecting rod tip portion.During from the recess division in V-arrangement cross section, crackle (main crackle) advances with its propagation because of brittle fracture, and crackle (main crackle) branches into little secondary crackle when propagating in big end.When connection rod set is contained in the internal combustion engine maybe when being assembled with the internal combustion engine of connecting rod, the easy propagation of secondary crackle self, thus produce the fragment that is easy to come off and in big end, staying little space.

When rod unit and cap member combination with one another were integral, if the complementary fit face of the division of rod unit and cap member is destructurized, mating surface just can not provide positioning function, and produces modification space between rod unit and cap member.As a result, may produce noise and may the circularity in the hole in the big end being had a negative impact.

Summary of the invention

Overall purpose of the present invention is to be provided for making the method and apparatus of connecting rod, this method and apparatus is by being split into connecting rod cap member and rod unit, the plane of disruption of cap member and rod unit is abut against each other, thereby promotion remove or is separated in the defect area that produces in the mating surface of division and make connecting rod.

Main purpose of the present invention is to be provided for making the method and apparatus of connecting rod, this method and apparatus makes cap member and rod unit secured to one another by the screwing force of control pair of bolts, makes connecting rod thereby this cap that has shunk when connecting rod is split into described cap member with described rod unit accurately is connected with this bar.

Another object of the present invention is to be provided for making the method and apparatus of connecting rod, this method and apparatus makes cap member and rod unit secured to one another by the screwing force of control pair of bolts, thereby promotes to remove or be separated in the defect area that produces in the mating surface of division and make connecting rod.

At first,, be arranged on the fixed station by the rod unit of workpiece orientation maintaining means with connecting rod according to the present invention, and with the cap member of this connecting rod be arranged on can movable table with respect to the fixed station motion on.

Subsequently, utilize first supporting mechanism of the shoulder of the described cap member of cross-brace that the described cap member that sets of described connecting rod is pressed to small end.And, activate second supporting mechanism so that described first supporting mechanism is pressed to described cap member, thereby described cap member is fixed on described first supporting mechanism and is positioned between near the described cap member the expansion part.

Then, be fixed on described first supporting mechanism and be positioned under the state between near the described cap member the expansion part at described cap member, activate load maintainer with imposed load, thereby in the displacement big end is split into described cap member and described rod unit synchronously at described cap member and described movable table.

After big end is split into described cap member and described rod unit, activate fragment and remove/discharges promotion mechanism, be used for when described cap member and described rod unit remain on described movable table and the described fixed station respectively, described movable table being shifted towards described fixed station.Because the plane of disruption of described cap member and the plane of disruption of described rod unit contact with each other, so can promote to remove the fragment that produces in the plane of disruption of described cap member and described rod unit, perhaps can promote to be released in the fragment that produces in the plane of disruption.After the plane of disruption of the plane of disruption of described cap member and described rod unit contacted with each other, the thrust that is applied to the plane of disruption became and increases level, thereby can preferably promote to remove the fragment that produces or promote to discharge this fragment in the plane of disruption.

Thus, according to the present invention, and then after connecting rod is split into described cap member and described rod unit, when described cap member and described rod unit remain on described movable table and the described fixed station respectively, described cap member and described rod unit are contacted with each other.Therefore, can successfully remove fragment, perhaps can promote to discharge this fragment.

In addition, according to the present invention, the cap member of division and the rod unit of division is as described below tightens together by pair of bolts.At first, this tightens by rotating at a predetermined velocity bolt, thereby the plane of disruption of described cap member and the plane of disruption of described rod unit are moved towards one another.When the combination complimentary to one another of the surperficial uneven place of the plane of disruption of described cap member and described rod unit, the plane of disruption of described cap member and the plane of disruption of described rod unit keep contacting with each other.Dislocation between the plane of disruption that the contraction of described cap member causes during at this moment, owing to division is proofreaied and correct.When described to bolt tighten torque when reaching default torque, bolt stops and keeping stand-by state.

For example manually tighten the described experimental data that the torque capacity of bolt is obtained with finger and preset and tighten torque temporarily based on utilizing torque wrench to measure the workman.This tightens torque temporarily can carry out different set according to the type of connecting rod, size etc.

In the present invention, tighten described time and do not wait, but to reach the moment of temporarily tightening torque identical from the torque of tightening of described bolt in the processing of tightening of each bolt bolt.Promptly, the processing of tightening of each bolt contacts with each other and makes that moment of plane of disruption alignment complimentary to one another of the plane of disruption of cap member and rod unit is identical from the plane of disruption of the plane of disruption of described cap member and described rod unit, and the dislocation between the plane of disruption that the contraction of described cap member causes during because of described connecting rod division is proofreaied and correct.Then, tighten describedly synchronously with one another, reach more temporarily than the described big pre-determined torque of torque of tightening up to the torque of tightening of bolt to bolt.

Subsequently, unscrew describedly, and promote to remove the fragment that in the cooperation plane of disruption of described cap member and described rod unit, produces or promotion and be released in and cooperate the fragment that produces in the plane of disruption bolt.

For example, can remove described fragment or the described fragment of promotion release by the corresponding plane of disruption of described cap member of grooming and described rod unit.

According to the present invention, make described cap member and described rod unit secured to one another by controlling described screwing force to bolt, the cap member that has shunk in the time of can making connecting rod be split into described cap member with described rod unit accurately is connected with rod unit.And, can successfully promote to remove or be separated in the fragment that produces in the mating surface of division.

Description of drawings

Figure 1A is the stereogram that can use connecting rod of the present invention;

Figure 1B is the stereogram of the connecting rod shown in Figure 1A, and this connecting rod has been split into cap member and rod unit;

Fig. 2 is the exploded perspective view of implementing according to the used splitter of the connecting rod manufacture method of one embodiment of the present invention;

Fig. 3 is the plane of the partly cut-away of splitter shown in Figure 2;

Fig. 4 is that splitter shown in Figure 2 axially cuts open the vertical sectional view of getting along it;

Fig. 5 is the amplification partial perspective view of splitter shown in Figure 2;

Fig. 6 is the amplification partial vertical sectional view of splitter shown in Figure 4;

Fig. 7 is the front view of partly cut-away, and expression applies the mode that preloads by the pre-load mechanism of splitter;

Fig. 8 is the front view of partly cut-away, and expression applies the mode of shock loading by pre-load mechanism;

Fig. 9 amplifies partial perspective view, and the expression connecting rod cracking becomes the mode of cap member and rod unit;

Figure 10 amplifies partial perspective view, and the expression connecting rod cracking becomes the mode of cap and bar;

Figure 11 is the flow chart of the operating sequence of splitter shown in Figure 2;

Figure 12 amplifies partial perspective view, the mode that the plane of disruption of indication rod parts and the plane of disruption of cap member press each other;

Figure 13 A to Figure 13 C is the partial front elevation view of amplifying, and the expression crack growth is secondary crackle, secondary crack propagation and produce the progressive stages of the fragment that comes off;

Figure 14 is the plane of connecting rod, expression connecting rod when connecting rod cracking becomes cap member and rod unit be how to be subjected to formerly rupturing and follow-up fracture between the adverse effect of time lag;

Figure 15 is the vertical sectional view of the splitter of another embodiment according to the present invention;

Figure 16 is the flow chart of the operating sequence of splitter shown in Figure 15;

Figure 17 is a schematic isometric of implementing the used connection device of connecting rod manufacture method according to the present invention;

Figure 18 is the stereogram of the positioner of combination in the connection device shown in Figure 17;

Figure 19 is the side view of the partly cut-away of positioner shown in Figure 180;

Figure 20 is the plane of positioner shown in Figure 180;

Figure 21 is the side view of partly cut-away of the part that comprises nut-runner of connection device shown in Figure 17;

Figure 22 is the plane of the part that comprises nut-runner of connection device shown in Figure 17;

Figure 23 is that expression has been used to connect the flow chart of the condition of tightening of the pair of bolts of the cap member of disconnection and rod unit each other;

Figure 24 A is the figure of expression cap member and the relation of rod unit between the step dimension at the left plane of disruption place that is fitted to each other;

Figure 24 B is the figure of expression cap member and the relation of rod unit between the step dimension at the right plane of disruption place that is fitted to each other;

Figure 25 is that expression has been used to connect the flow chart of the condition of tightening of the pair of bolts of the cap member of disconnection and rod unit each other according to another embodiment;

Figure 26 is a plane, and expression is by the corresponding brush grooming mode of the cap member of disconnection and the plane of disruption of rod unit each other;

Figure 27 is cap member and the stereogram of rod unit before being connected to each other by pair of bolts that produces by the division connecting rod; And

Figure 28 is the stereogram by tight a bolt cap member connected to one another and rod unit.

The specific embodiment

Figure 1A is that Figure 1B is the stereogram of connecting rod 30 as the stereogram that can use the connecting rod 30 of workpiece of the present invention, and this connecting rod has split into cap member 32 and rod unit 34.

Shown in Figure 1A and Figure 1B, connecting rod 30 has: big end 38, and it comprises cap member 32 and rod unit 34 that the connecting hole 36 that crosses circular links into an integrated entity; And small end 40, it is positioned at the end away from big end 38 of rod unit 34, and is limited with less through hole 39 therein.Connecting rod 30 is for example by casting or forging integrally formed.

Big end 38 is by being limited with pair of bolts hole 42a, 42b such as the borehole drill construction that bores etc. on the both sides of connecting hole 36.For example in the process of assembled engines, aftermentioned bolt 9a, 9b are screwed into bolt hole 42a, 42b from cap member 32 sides respectively, thereby cap member 32 is fastened to rod unit 34.When cap member 32 and rod unit 34 were connected to each other like this, big end 38 was connected to the crank-pin of engine.

In Figure 1A, the division zone 44 that wherein big end 38 can split into cap member 32 and rod unit 34 is positioned at the boundary between cap member 32 and the rod unit 34.Division zone 44 is arranged in the both sides of big end 38 in the mode of crossing connecting hole 36 from central authorities.

Fig. 2 to Fig. 4 shows the enforcement splitter 50 used according to the connecting rod manufacture method of one embodiment of the present invention.Fig. 2 is the exploded perspective view of splitter 50.Fig. 3 is the plane of the partly cut-away of splitter 50.Fig. 4 is that splitter 50 axially cuts open the vertical sectional view of getting along it.

Splitter 50 comprises: workpiece orientation maintaining means 52, and it is used for setting connecting rod 30 for be positioned at the precalculated position and keep so setting connecting rod 30; Division mechanism 54, it is used to divide the big end 38 of connecting rod 30; Pre-load mechanism 56 (seeing Fig. 7 and Fig. 8), it is used for applying and preloading to division mechanism 54; And load maintainer 58 (seeing Fig. 7 and Fig. 8), it is used for applying shock loading by weight 57 is fallen to division mechanism 54.

Workpiece orientation maintaining means 52 comprises: base portion 60, and it is roughly the rectangular shape of elongation in plane; Fixed station 62, it is fixedly mounted on the base portion 60; Movable table 64, its arrange in the face of fixed station 62 and can along base portion 60 axially towards with away from fixed station 62 horizontal movements; And first and second carriages 66,68, they are fastened to the opposed end of base portion 60 and axially protruding along base portion 60 respectively.

Fixed station 62 comprises the stationary work-table 70 that is fixed to base portion 60 by first carriage 66, be fastened to first oil cylinder 72 of stationary work-table 70, the far-end that is engaged to the piston rod 72a of first oil cylinder 72 also can be along the moveable block 76 that axially moves back and forth along guide rail 74 of connecting rod 30, and be fastened in the groove that is defined in the moveable block 76 and first workpiece support 78 of stretching out preset distance from the end of moveable block 76, first workpiece support 78 can be moved under the effect of first oil cylinder 72 and be engaged with the small end 40 of connecting rod 30, and axially 38 promotes small end 40 towards big end along connecting rod 30.

Be fed to first oil cylinder 72 oil pressure can by the switch valve (not shown) high level with low-level between change, to change the axially used power (thrust) of 38 promotion small end 40 towards big end along connecting rod 30.

As Fig. 2 and shown in Figure 5, be limited with the conical engagement groove 80 in V-arrangement cross section in the far-end of first workpiece support 78, be used for the small end 40 of engagement link 30.

Fixed station 62 also has: a pair of guide 82a, 82b, and they roughly are fixedly mounted on the stationary work-table 70 in parallel with each other, and moveable block 76 is arranged between them; Sliding part 86, its can be on a pair of guide pad 84 that can slide along corresponding guide 82a, 82b towards with move away from connecting rod 30; And first cylinder 88, it is fixedly mounted on the stationary work-table 70, be used to make sliding part 86 towards with away from connecting rod 30 motions.

On sliding part 86, be equipped with: second cylinder 94, it can pass through predetermined angular around first pin, 92 angular movements that attach to a pair of rest pad 90a, 90b on the sliding part 86 pivotally; Fastener 96, it has the end of bifurcated and joins the piston rod 94a of second cylinder 94 to; And second workpiece support 104, the one end attaches to the bifurcate end of connector 96 pivotally by second pin 98, and its middle body is supported on the connecting plate 102 of sliding part 86 pivotally by the 3rd pin 100.

Second workpiece support 104 has the roughly extrusion 104a of Y shape on its far-end.When second cylinder 94 activated, extrusion 104a was around the 3rd pin 100 angular movements (rotations) predetermined angular, with the upper surface of the big end 38 (rod unit 34) of downward extruding connecting rod 30, thus maintenance connecting rod 30.

As shown in Figure 5, close stationary work-table 70 is equipped with the fixed block 108 of the bifurcated that protrudes upward regularly on base portion 60, is limited with the recess 106 in essentially rectangular cross section in the upper surface of fixed block 108.Arrange positioning and fixing pin 110 in recess 106, it is used for extending through the hole and the location of small end 40 and keeping small end 40.

When making first workpiece support, 78 levels enter in the recess 106 in the fixed block 108, the engaged groove 80 in the far-end of first workpiece support 78 engages with small end 40 reliably, and first workpiece support 78 and connecting rod 30 keep aligned axially to each other simultaneously.

As Fig. 4 and shown in Figure 6, between fixed block 108 and movable table 64, be furnished with the maintainance block 112 that is fixedly mounted on the base portion 60.First axle 114 is installed on maintainance block 112 regularly, and it has the half-circle projection 114a that is used for the EDGE CONTACT of the connecting hole 36 of big end 38.

As shown in Figures 2 and 3, roughly be arranged parallel to each other a pair of first director element 116a, the 116b that is used for along the axial lead movable table 64 of connecting rod 30.The first director element 116a, 116b are limited with axially extended elongated slot respectively above the upper surface of base portion 60.Have pair of flanges 118a, 118b on the opposite side edges of sliding shoe 118, they are arranged in the respective grooves of the first director element 116a, 116b slidably.

As Fig. 4 and shown in Figure 6, second axle 120 is installed on the upper surface of sliding shoe 118 regularly, it has the half-circle projection 120a that is used for the EDGE CONTACT of the connecting hole 36 of big end 38.When second axle 120 during with movable table 64 displacement synchronously, second axle 120 towards or away from first axle, the 114 motion preset distances on the fixed station 62.Half-circle projection 114a, the 120a of first and second axles 114,120 is as a pair of expansion part.

Be limited with recess 114b, the 120b of square-section in the corresponding matching surface of half-circle projection 114a, 120a.When recess 114b, 120b combination with one another, they are the common vertical through hole that forms between half-circle projection 114a, 120a.In this vertical through hole, engage the wedge 122 that the square-section is arranged.At this moment, the half-circle projection 114a of first and second axles 114,120,120a combination with one another, thus round boss is provided.This round boss is set in the connecting hole 36 in the big end 38 of connecting rod 30.

End at sliding shoe 118 is fixed with vertically extending connecting plate 124.The a pair of level each other of the surperficial upper support of connecting plate 124 the 3rd cylinder 126a spaced apart by a predetermined distance, 126b (see figure 3).The 3rd cylinder 126a, 126b have the corresponding piston bar, and described piston rod is connected to a pair of the 3rd workpiece support (first supporting mechanism) 130a, 130b by corresponding axle 128.The 3rd workpiece support 130a, 130b can be by corresponding the 3rd cylinder 126a, 126b axially moving back and forth on the flat surfaces on second axle 120 along connecting rod 30.

A pair of tooth 132 is installed on the axial end portion of corresponding the 3rd workpiece support 130a, 130b.Tooth 132 is used for against the cap member 32 of the big end 38 of connecting rod 30, and along the axis extruding connecting rod 30 that is parallel to connecting rod 30 from big end 38 towards the direction of small end 40.The 3rd workpiece support 130a, 130b have corresponding inclined surface 138 on its other end away from tooth 132.Inclined surface 138 is used to engage the compressive surface 136 of corresponding the 4th workpiece support 134a, 134b.

As shown in Figures 2 and 3, the second director element 140a to 140d that the 3rd workpiece support 130a, 130b are fixedly mounted in two pairs of almost parallels on the last flat surfaces of second axle 120 guides, in order to the axial linear displacement along connecting rod 30.

Fixed head 141 is installed on the upper surface of sliding shoe 118.On the upper plate 144 that is installed in by supporting component 142 on the fixed head 141, support a pair of second oil cylinder (second supporting mechanism) 146a, 146b (see figure 2) regularly.The second oil cylinder 146a, 146b have corresponding vertical piston bar, and the distal engagement of piston rod is to all being roughly corresponding the 4th workpiece support 134a, the 134b of cube piece form.The 4th workpiece support 134a, 134b can pass through the second oil cylinder 146a, 146b vertical movement.

Be fed to the second oil cylinder 146a, 146b oil pressure can by the switch valve (not shown) high level with low-level between change, to change the used power (thrust) of cap member 32 promotion the 3rd workpiece support 130a, 130b towards connecting rod 30.

The surface of each the 4th workpiece support 134a, 134b forms compressive surface 136, and it is used to engage the inclined surface 138 of each the 3rd workpiece support 130a, 130b and promotes the 3rd workpiece support 130a, 130b towards connecting rod 30.

As shown in Figure 3, supporting component 142 comprises: a pair of vertical fixing is to the upper surface of fixed head 141 and the first gripper shoe 142a, the 142b that is spaced apart at a predetermined distance from each other, and the first gripper shoe 142a, 142b are roughly parallel to extending axially of connecting rod 30; The second gripper shoe 142c, the upside wall of the first gripper shoe 142a, 142b is extended and be connected to its approximate horizontal; And a pair of the 3rd gripper shoe 142d, 142e, they roughly extend parallel to each other and are connected to this vertical surface along the vertical surface of the second gripper shoe 142c.

Be furnished with roughly vertically extending in parallel with each other corresponding ridge 148 on the surface of the 3rd gripper shoe 142d, 142e.Ridge 148 is slidably engaged in the corresponding groove 150 that is defined in respectively among the 4th workpiece support 134a, the 134b, thereby the 4th workpiece support 134a, 134b can be guided by ridge 148 and move both vertically smoothly.

When the compressive surface 136 of corresponding the 4th workpiece support 134a, 134b engaged and promote the 3rd workpiece support 130a, 130b with the corresponding inclined surface 138 of the 3rd workpiece support 130a, 130b, the 3rd workpiece support 130a, 130b produced reaction force.The reaction force of Chan Shenging is born by the 3rd gripper shoe 142d, the 142e that the vertically extending first gripper shoe 142a, 142b keep like this.

Have the first side wall 68a from base portion 60 outwardly directed second carriages 68, on this first side wall 68a, four-cylinder 152 is installed regularly.Four-cylinder 152 has first piston bar 152a, and the far-end of first piston bar 152a is connected to connecting plate 124, is used to make movable table 64 integral body axially displaced along connecting rod 30.

Four-cylinder 152 is double rod type cylinders, comprises the first piston bar 152a and the second piston rod 152b that stretch out from its opposed end along its cylinder barrel axis respectively.The far-end that first piston bar 152a is fixed to connecting plate 124, the second piston rod 152b that are connected with sliding shoe 118 is a free end.

The a pair of standby cylinder that is fixed to the upper 153,155 of the first side wall 68a upper support of second carriage 68 is arranged four-cylinder 152 between this is to standby cylinder.Standby cylinder 153,155 has the corresponding piston bar, the far-end of piston rod is connected to connecting plate 124, be used to make movable table 64 integral body axially displaced along connecting rod 30, thereby make the plane of disruption of the plane of disruption of the cap member 32 that is shifted synchronously with movable table 64, as described later against the rod unit 34 that is fixed on the appropriate location.

Second carriage 68 also has the second sidewall 68b that is fixed with the 5th cylinder 154.The 5th cylinder 154 has piston rod 154a, and the far-end of piston rod 154a is positioned to become in the face of relation with the second piston rod 152b of four-cylinder 152 and can engage with the second piston rod 152b.When the 5th cylinder 154 activated and when piston rod 154a is extended, makes piston rod 154a and the second piston rod 152b of four-cylinder 152 engage and push the second piston rod 152b, thereby movable table 64 integral levels are shifted.

Division mechanism 54 comprises: first and second axles 114,120, and they have corresponding half- circle projection 114a, 120a in the connecting hole 36 in big end 38 to be placed; And wedge 122, it is waited to be pressed into and is used to make first and second axles 114,120 to expand away from each other.

Half- circle projection 114a, 120a have recess 114b, 120b, insert wedge 122 in recess 114b, 120b.Recess 114b in first axle 114 on the fixed station 62 is limited by the wall of approximate vertical, and the recess 120b in second axle 120 on the movable table 64 limits (seeing Fig. 4 and Fig. 6) to outward-dipping conical surface upward by the edge.

Wedge 122 has away from vertical plane the conical surface 122a that far-end tilts gradually on it.Wedge 122 inserts recess 114b, 120b, makes conical surface 122a keep the wall sliding-contact with second axle 120.When wedge 122 is pushed and when moving downward in Fig. 4, conical surface 122a slides against the wall of second axle 120, the expansion of sliding away from each other of first axle 114 and second axle 120.

As shown in Figure 7, pre-load mechanism 56 has the 3rd oil cylinder 156, and it is used to produce preloading to wedge 122 to be applied.The 3rd oil cylinder 156 has piston 164 and is connected to the piston rod (load-transmitting element) 162 of the lower end of wedge 122 by bindiny mechanism 160, bindiny mechanism 160 comprises connecting pin 158 etc., and piston 164 has the step 164a that engages with ring-shaped step 162a on the piston rod 162.

Piston rod 162 passes piston 164 central authorities and extends also and can slide with respect to piston 164.Piston 164 can be shifted synchronously along wedge 122 bulged-in directions and piston rod 162, and can be along moving dividually with piston rod 162 in the opposite direction with wedge 122 bulged-in sides.Be pointed out that in addition the 3rd oil cylinder 156 only applies along the direction (downward direction) of piston rod 162 by piston 164 and preloads.

Pre-load mechanism 56 and load maintainer 58 have the public load transmitter shaft (load-transmitting element) 166 that is connected to wedge 122 by piston rod 162.Axle 166 is integral by step 162a and piston rod 162, and has flange 166a at its end place away from piston rod 162.The position of flange 166a can be along the axial adjustment of axle 166.

Load maintainer 58 has vertical movable stage 168, the weight 57 that vertical movable stage 168 supports on it also can move downward and engage with flange 166a collision, thereby produce the shock loading for the treatment of to be applied to wedge 122 via axle 166, a pair of guide 170a, 170b and a pair of vibration-damped component 172a, 172b, the vertical movable stage 168 of vertical guide slidably on guide 170a, 170b, vibration-damped component 172a, 172b are used for absorbing the vibration that is added on the vertical movable stage 168 when vertical movable stage 168 falls.

Load maintainer 58 also has: the stop mechanism (not shown), and it is used to adjust the bottom of the downward stroke of vertical movable stage 168; Vertical movable stage gigback (not shown), it is used to make the vertical movable stage 168 that has fallen to return the spare space; And returning the cylinder (not shown), it has been used to make displacement downwards and the wedge 122 of big end 38 divisions of connecting rod 30 has been returned initial position.

Splitter 50 basic as above-mentioned formations according to embodiment of the present invention.Describe the operation and the advantage of splitter 50 below in detail with reference to flow chart shown in Figure 11.

At first, integrally formed connecting rod 30 is set in (see figure 4) in the workpiece orientation maintaining means 52.At this moment, small end 40 is by positioning and fixing pin 110 location, and the connecting hole 36 in the big end 38 is assemblied in half-circle projection 114a, the 120a last (step S1) of the combination of first and second axles 114,120.

The connecting rod 30 that will be set in the appropriate location like this by workpiece orientation maintaining means 52 remains on the appropriate location then.Specifically, activate first oil cylinder 72 so that the moveable block 76 that is connected with the far-end of piston rod 72a is shifted towards connecting rod 30 when being guided by guide rail 74.Being fixed on first workpiece support 78 in the groove of moveable block 76 engages with the small end 40 of connecting rod 30 and compresses axially small end 40 (step S2) towards big end 38.

As shown in Figure 5, in the recess 106 in the essentially rectangular cross section that limits of first workpiece support, 78 horizontal movements to central authorities at the fixed block 108 of bifurcated.Engaged groove 80 that is limited to the V-arrangement cross section in the far-end of first workpiece support 78 and axial coaxial engage of the small end 40 of connecting rod 30 along connecting rod 30.

Then, activate the 3rd cylinder 126a, 126b so that axially displaced slidably towards connecting rod 30 in by the second director element 140a to 140d guiding by axle 128 the 3rd workpiece support 130a, the 130b that are connected with the piston rod of the 3rd cylinder 126a, 126b.Make the corresponding shoulder of the cap member 32 of tooth 132 engagement link 30 on the axial end portion of corresponding the 3rd workpiece support 130a, 130b, and along from big end 38 towards the direction of small end 40 axial compression connecting rod 30, thereby the horizontal shoulder (step S3) of (level) support cap parts 32.

At this moment, the corresponding shoulders of the cap member 32 of tooth on the axial end portion of corresponding the 3rd workpiece support 130a, 130b 132 slight extruding connecting rods 30 so that default orientation is aimed in the inclination of connecting rod 30 (axis), that is, correction coupler 30 axially.

Then, activate second cylinder 94, thereby make second workpiece support 104 rotate given angle around the 3rd pin 100 so that the piston rod 94a that links to each other with connector 96 extends.When second workpiece support 104 was rotated given angle, near two Dian Chus of extrusion 104a connecting hole 36 of the roughly Y shape on its far-end contacted with the upper surface of big end 38, and push big end 38 (step S4) downwards.

At this moment, half-circle projection 114a, the 120a of first and second axles 114,120 is bonded in the connecting hole 36 of big end 38, and positioning and fixing pin 110 is bonded in the hole in the small end 40.When connecting rod 30 is placed on the last flat surfaces of first axle 114, settle confirming mechanism (not shown) add their confirmation (step S5).

Specifically, for example settle confirming mechanism to be included in the air outlet slit hole that limits in the last flat surfaces of first axle 114, discharge from the air outlet slit hole from the air in air source.When connecting rod 30 was placed on the last flat surfaces of first axle 114, air outlet slit bore closure, a sensor (not shown) detected the reducing of air mass rate of emission in air outlet slit hole,, detect the reduction of the air blowdown presssure in air outlet slit hole that is.Therefore, can be based on confirming reliably that from the signal of sensor connecting rod 30 is placed on the last flat surfaces of first axle 114.

Then, activate pre-load mechanism 56 the 3rd oil cylinder 156 so that piston 164 be shifted downwards.The downward displacement of piston 164 makes the step 162a that engages with step 164a make piston rod 162 move downward (see figure 7).Simultaneously, piston rod 162 is shifted coupled wedge 122 downwards, preloads (step S6) thereby apply to wedge 122.

Wedge 122 is by half- circle projection 114a, 120a clamping and be pressed among recess 114b, the 120b.When wedge 122 was pushed downwards, the conical surface of the qualification recess 120b of second axle 120 and the conical surface 122a of wedge 122 slided with abutting against each other, thus the slight away from each other expansion of first and second axles 114,120.The half-circle projection 120a of the half-circle projection 114a of first axle 114 and second axle 120 level each other separates to set a distance, and presses the respective inner surfaces of the connecting hole 36 in the big end.

At this moment be applied to preloading of wedge 122 and be set at such level,, that is, allow the level of big end 38 strains even make that can not rupture in big end 38 when half- circle projection 114a, 120a press the respective inner surfaces of connecting hole 36 yet.Therefore, the half-circle projection 114a, the 120a that prevent the big end 38 and first and second axles 114,120 tremble relative to each other, and will be firmly held in the appropriate location as the connecting rod 30 of workpiece by half-circle projection 114a, the 120a of first and second axles 114,120.

Apply under the state that preloads at the connecting hole 36 in big end 38, the second oil cylinder 146a, 146b activated and make that all the 4th workpiece support 134a, the 134b of formula are shifted vertically downward in block form.At this moment, ridge 148 on the 3rd gripper shoe 142d, the 142e of supporting component 142 is bonded in the respective groove 150 that is defined in respectively among the 4th workpiece support 134a, the 134b that faces with the 3rd gripper shoe 142d, 142e, thereby guides the 4th workpiece support 134a, 134b along the downward direction (see figure 3) of moving smoothly.

When the 4th workpiece support 134a, 134b reduce, corresponding inclined surface 138 on the compressive surface 136 of corresponding the 4th workpiece support 134a, 134b and the end of the 3rd workpiece support 130a, 130b is slidably engaged, thereby promotes the 3rd workpiece support 130a, 130b (step S7) towards the cap member 32 of connecting rod 30.

Therefore, the cap member 32 of connecting rod 30 is completely locked at when the 4th workpiece support 134a, 134b reduce by the 3rd workpiece support 130a, the 130b of the corresponding shoulder of the 4th workpiece support 134a, 134b extruding and support cap parts 32 and the appropriate location between the half-circle projection 120a between the shoulder of cap member 32 of second axle 120.

Cap member 32 at connecting rod 30 is locked under the state of appropriate location securely, discharges vertical movable stage 168, and vertical afterwards movable stage 168 and weight 57 descend when being directed to part 170a, 170b guiding.When vertical movable stage 168 impinged upon the flange 166a of axle on 166 and goes up, axle 166 was forced to move downward, thereby applies shock loading (see figure 8) (step S8) to wedge 122.At this moment, because the piston 164 of the 3rd oil cylinder 156 can along with wedge 122 bulged-in directions (promptly, applying the direction of shock loading) opposite direction is with respect to axle 166 motions, so shock loading can not weakened by the 3rd oil cylinder 156, but is applied to wedge 122 reliably.

Under the effect of the shock loading that applies, wedge 122 is pressed further among recess 114b, the 120b of first and second axles 114,120.The conical surface of the qualification recess 120b of second axle 120 and the conical surface 122a of wedge 122 slide with abutting against each other, make the further expansion away from each other of first and second axles 114,120 simultaneously.When first and second axles, 114,120 such approximate horizontal ground separate away from each other, big end 38 exceeds the distortion outside its regime of elastic deformation and splits in regional 44 punishment of division, concentrates in cap member 32 and the rod unit 34 at this place's stress and (sees Fig. 9 and Figure 10) (step S9).Because cap member 32 is kept by the tooth on the 3rd workpiece support 130a, the 130b 132 under from the pressure of the second oil cylinder 146a, 146b, can prevent that the cap member 32 that ruptures from scattering around.

Specifically, be fixed under the state of appropriate location in first axle 114 on the fixed station 62, when shock loading was applied to wedge 122, the sliding shoe 118 of second axle 120 on the movable table 64 in by the first director element 116a, 116b guiding and on the base portion 60 be sliding transfer synchronously.

In other words, the rod unit 34 of connecting rod 30 is fixedly mounted on the fixed station 62 by first axle 114, positioning and fixing pin 110 and first workpiece support 78, and cap member 32 is locked in the appropriate location securely by the 4th workpiece support 134a, 134b, the 3rd workpiece support 130a, 130b and second axle 120.When second axle 120 of movable table 64 and sliding shoe 118 subsequently on base portion 60 during away from fixed station 62 sliding transfers, the big end 38 of connecting rod 30 splits into cap member 32 and rod unit 34.

After the big end 38 of connecting rod 30 splits into cap member 32 and rod unit 34, activate and unshownedly return cylinder and make wedge be back to its initial position for 122 liters.

When the upper end of wedge 122 when the upper surface of cap member 32 and rod unit 34 protrudes upward preset distance, four-cylinder 152 and standby cylinder 153,155 (far-end of their respective piston 152a, 153a, 155a is fixed to movable table 64 by second carriage 68) roughly activated simultaneously, so that piston rod 152a, 153a, 155a extend and make movable table 64 towards fixed station 62 displacements, thereby make the plane of disruption of the plane of disruption of cap member 32 and rod unit 34 joint that abuts against each other.

Under the situation that cap member 32 and rod unit 34 abut against each other, unshowned switch valve work and the pressure of oil that will be supplied to first oil cylinder 72 is from the low-level high level that becomes, to increase small end 40 with connecting rod 30 towards the used power (thrust) of its big end 38 axial compressions.Simultaneously, unshowned switch valve work and the pressure of oil that will be supplied to the second oil cylinder 146a, 146b are from the low-level high level that becomes, to increase the used power (thrust) of cap member 32 extruding towards connecting rod 30 with the 3rd workpiece support 130a, 130b.Therefore, as shown in figure 12, the plane of disruption of the plane of disruption of cap member 32 and rod unit 34 is placed to the joint (step S10) that abuts against each other under the thrust of expectation.Be pointed out that in addition, the plane of disruption of the plane of disruption of cap member 32 and rod unit 34 abut against each other engage after, the thrust (pressure) that is applied to the plane of disruption of cooperation is simultaneously from the low-level high level that becomes, with issuable fragment in the plane of disruption that promotes to remove or be released in cooperation.

Shown in Figure 13 A to Figure 13 C, when big end 38 was fractured into cap member 32 and rod unit 34, main crackle 200 was propagated and the generation brittle fracture.Between main crackle 200 propagation periods, main crackle 200 branches into little secondary crackle 202 easily.When connecting rod 30 is assembled in the internal combustion engine maybe when being combined with the internal combustion engine of connecting rod 30, secondary crackle 202 growth or co-propagate, thus occur between the plane of disruption of the plane of disruption of cap member 32 and rod unit 34 almost discontiguous regional 204.The zone is 204 very crisp, makes to regional 204 imposed loads (stress) time, and zone 204 comes off as fragment, shown in Figure 13 C.

According to present embodiment, and then connecting rod 30 is split into after cap member 32 and the rod unit 34 by the wedge 122 that falls, and four-cylinder 152 and standby cylinder 153,155 roughly activated simultaneously, so that movable table 64 is towards fixed station 62 displacements.After the plane of disruption of the plane of disruption of cap member 32 and rod unit 34 abuts against each other, the fragment that in the plane of disruption that fragment that thrust that the plane of disruption that cooperates applies expectation produces in the plane of disruption that is released in cooperation or promotion are released in cooperation, produces.

As mentioned above, and then connecting rod 30 is split into after cap member 32 and the rod unit 34, and cap member 32 and rod unit 34 are kept by movable table 64 and fixed station 62 respectively.Then, make movable table 64 towards fixed station 62 displacement so that the plane of disruption of cap member 32 against the plane of disruption of rod unit 34.The fragment that the plane of disruption that cooperates is further pressed together and produces in the plane of disruption that the fragment that produces in the plane of disruption that cooperates or promotion be released in cooperation to remove.

After fragment in promoting connecting rod 30 discharges, in handling, next fragment is removed reliably from the plane of disruption with metallic brush, adhesive tape, suction machine or vibrator.Specifically, when using metallic brush, fragment is removed from the plane of disruption with the metallic brush grooming plane of disruption.When using adhesive tape, adhesive tape is put on the plane of disruption peel off and remove fragment from the plane of disruption then from the plane of disruption.When using suction machine, apply negative pressure and remove fragment to the plane of disruption from the plane of disruption by suction machine.Can both remove fragment from the plane of disruption reliably in either case.

After the plane of disruption from the plane of disruption of cap member 32 and rod unit 34 removes fragment, perhaps promoting after the plane of disruption of the plane of disruption of cap member 32 and rod unit 34 discharges fragment, stopping using to first oil cylinder 72 of cap member 32 and rod unit 34 applied thrusts and the second oil cylinder 146a, 146b with the thrust of release to the plane of disruption of the cooperation of connecting rod 30.Therefore, the plane of disruption of the cooperation of cap member 32 and rod unit 34 separates each other slightly, thereby can successfully be released in the fragment that produces in the plane of disruption of cooperation.

Then, activate first oil cylinder 72, the second oil cylinder 146a, 146b, second cylinder 94, the 3rd cylinder 126a, 126b, four-cylinder 152 and standby cylinder 153,155 and make first to fourth workpiece support 78,104,130a, 130b, 134a, 134b roughly return their initial position (step S11) simultaneously.

After thereby the cap member 32 of the connecting rod 30 of fracture and member that rod unit 34 has been limited are turned back to their initial position release link 30, the corresponding clamp mechanism that cap member 32 and rod unit 34 are installed on the arm of multi-spindle machining hand (not shown) clamps, thereby is sent to next processing.Finally, the 5th cylinder 154 activated and makes movable table 64 be moved back into its initial position.

For example, as shown in figure 14, when big end is split into cap member and rod unit by traditional splitter (not shown), if formerly have time lag between fracture (zone) and the follow-up fracture (zone), then the stress from fracture formerly acts on the rod unit, makes the power of rod unit towards follow-up region of fracture distortion easily thereby apply.Therefore, rod unit is out of shape shown in the double dot dash line among Figure 14 like that, and the bore deformation in the small end.Owing to the expected product characteristic of connecting rod 30 requires the structure of rod unit and the structure in the hole in the small end to have high dimensional accuracy.

Be pointed out that in addition when integrally formed connecting rod 30 is split into two parts, promptly when cap member 32 and rod unit 34, bending stress acts on the part of disruptive member, the easy local deformation of splitting plane parts precision in other words affects adversely easily.Specifically, two parts all have two foots after division.When parts divided, their division was not to carry out simultaneously in foot.But a foot begins division earlier, and another foot begins division with small time lag.When finishing division for one that early ruptures in the foot, the division of another foot of follow-up division is still being carried out.In the final stage of the division of another foot, the beginning in the foot of division early of described parts is separated from one another.

According to present embodiment, the rod unit 34 of big end 38 is fixed on the fixed station 62, and cap member 32 is firmly-fixed to movable table 64 by the second oil cylinder 146a, the 146b of the 3rd workpiece support 130a, 130b and locking the 3rd workpiece support 130a, 130b.

When big end 38 splits into cap member 32 and rod unit 34, has only cap member 32 with movable table 64 displacements.Therefore, at the plane of disruption place of cap member 32 and rod unit 34, formerly any time lag between fracture and the follow-up fracture minimizes.

Therefore according to present embodiment, do not need to set up timing to discharge external pressure, and any time lag between fracture formerly and the follow-up fracture is minimized.

In addition, according to present embodiment, divide under the impact loading that connecting rod 30 produces when weight falls.Figure 15 represents the splitter of another embodiment according to the present invention, and wherein the oil cylinder 156 as single actuator spurs wedge 122 downwards, thereby applies shock loading to wedge 122.

Figure 16 represents the operating sequence of splitter shown in Figure 15.In operating sequence shown in Figure 16, do not apply and preload, and increase gradually and make big end 38 split into cap member 32 and rod unit 34 (seeing step S7) by the pulling force that oil cylinder 156 applies to wedge 122.

Figure 17 represents to implement the used connection device 300 of connecting rod manufacture method according to the present invention.Connection device 300 is combined with and is used for positioning cap parts 32 and rod unit 34 so that the uneven place of their plane of disruption positioner 210 aligned with each other.

At first positioner 210 is described below with reference to Figure 18,19 and 20.

Positioner 210 has: base portion 212 is equipped with the sliding panel 211 with elongated slot (not shown) on its lower surface; Guide rail 214, it is positioned on the base portion 212; Two side plate 216a, 216b, they vertically roughly are installed on the base portion 212 around guide rail 214 in parallel with each other; First bearing 218 and second bearing 220, their locate and are fixed to the upper surface of vertical end of side plate 216a, 216b; And the 3rd bearing 222, it is installed on the upper surface of side plate 216a, 216b in the fixed-site near second bearing 220 between first bearing 218 and second bearing 220.

Be equipped with bar connecting plate 223 in the recess that limits in the end of base portion 212, it is connected on the piston rod 314 of displacement cylinder 310.

The guide rail 214 (seeing Figure 18) that is the slab form of broad has at its end upper support first fastener 224, the first fasteners 224 and is limited in its lower surface and is assemblied in recess on the guide rail 214.Flat board 226 is set on the upper end of first fastener 224, and on dull and stereotyped 226 end, connecting plate 228 is installed vertically.Fixation clip 230 on the end face of flat board 226 and connecting plate 228.The piston rod 234 that is used as first cylinder 232 of first shift mechanism is connected to pressing plate 230.

First keeper 240 (seeing Figure 19) is vertically mounted on the other end of flat board 226, plugs pad 236,238 between them.First keeper 240 extends up through the through hole 242 that limits and enters the aperture 39 that limits in the small end of connecting rod 30 in first bearing 218.When the piston rod 234 of first cylinder 232 moved back and forth, first fastener 224 was shifted with piston rod 234 on guide rail 214.

First keeper 240 has the flexure plane 244 (seeing Figure 20) of the first internal perisporium face S1 complementation of the qualification aperture 39 of shape and connecting rod 30.Flexure plane 244 maintenances contact with the part of the more close cap member 32 of the first internal perisporium face S1.

Similarly, guide rail 214 (seeing Figure 18) has at its opposed end upper support second fastener 246, the second fasteners 246 and is limited in its lower surface and is assemblied in recess (seeing Figure 19) on the guide rail 214.The vertical movement plate 250 of pad 248 being installed on the upper surface of second fastener 246 and being grown than pad 248.Be spirally connected by the screw rod 254 of nut 252 location and pass Displacement plate 250.The head abuts of screw rod 254 is as the piston rod 258 of second cylinder 256 of second shift mechanism.

Second keeper 262 is arranged vertically on pad 248, plugs another pad 260 between them.Second keeper 262 extends through the connecting hole 36 that the through hole 263 that limits in second bearing 220 enters connecting rod 30.Second keeper 262 has the flexure plane 264 (seeing Figure 20) of the second internal perisporium face S2 complementation of the qualification connecting hole 36 of shape and cap member 32.

As shown in figure 18, second bearing 220 has arm 266, and having roughly, the L shaped framework 268 in L shaped cross section is fastened to arm 266 by bolt 269.Be used as the outside wall surface of the L shaped framework 268 of the keeper that keeps cap member 32 against cap member 32.

The 3rd bearing 222 has the 3rd keeper 272 that stretches out near the end of second bearing 220 from it.The 3rd keeper 272 has the flexure plane 270 of the 3rd internal perisporium face S3 complementation of the qualification connecting hole 36 of shape and rod unit 34.Rod unit 34 is by the 3rd keeper 272 location and be fixed on the appropriate location.

Second keeper 262 and the 3rd keeper 272 limit corresponding cavity 274,276 (seeing Figure 19) in the position that they face one another.In cavity 274,276, insert helical spring 278 as elastic component.Because the appropriate location be located and be fixed on to second keeper 262 can with the 3rd bearing 222 by 246 displacements of second fastener and the 3rd keeper 272, so helical spring 278 pushes away the 3rd keeper 272 with second keeper 262 usually.

Except positioner 210 as above-mentioned structure, connection device 300 (seeing Figure 17) also has first plate 306 and second plate 308, corresponding pair of guide rails 302a, 302b and guide rail 304a, 304b are installed on the respective upper surfaces of first plate 306 and second plate 308, and first plate 306 and second plate 308 are disposed adjacent one another.Positioner 210 can be arranged on guide rail 302a, the 302b on first plate 306 with being shifted, and the sliding panel 211 that is used to be installed on the lower surface of base portion 212 guides on guide rail 302a, 302b.Specifically, guide rail 302a, 302b insert in the respective fine elongated slot in the sliding panel 211 slidably.

Displacement cylinder 310 is installed on the upper surface of first plate 306, and has been arranged vertically a shape support 312 on it.Displacement cylinder 310 has piston rod 314, and the far-end of piston rod 314 is connected to bar connecting plate 223, and bar connecting plate 223 is assemblied in the end that second cylinder 256 is installed of base portion 212.

Restriction cylinder 320 in lateral attitude is installed on the end face of shape support 312 by space bar 316 and carriage 318, this end face with along the longitudinal extension of first plate 306 and thereon the horizontal component of supporting and positioning device 210 face.

Lateral attitude restriction cylinder 320 has the bar 322 that can stretch out and be connected to a pair of gripper shoe that is spaced laterally apart 324 with axial motion from its relative both sides.The arm 326 that extends towards door shape support 312 is installed on the lateral surface of gripper shoe 324.Vibration-damped component 328 joins the surface that faces one another (seeing Figure 21,22) of the far-end of arm 326 to.

On guide rail 304a, the 304b of second plate 308, pair of brackets 330a, 330b (seeing Figure 17) can be installed with being shifted.Anchor clamps 332 are installed on the lower surface of support 330a, 330b, and guide rail 304a, 304b are inserted in the respective grooves that limits in the lower surface of anchor clamps 332.

L shaped strut 334 is installed respectively on support 330a, 330b, and corresponding nut- runner 336a, 336b is arranged in strut 334 upper supports.

Shown in Figure 21,22, nut- runner 336a, 336b have corresponding rotatable shaft 338, and are separately installed with corresponding slot 340 on the far-end of main shaft 338.Be used for the respective cavities (not shown) that places slot 340 to limit the corresponding heads that cap member 32 is fastened to bolt 9a, the 9b (seeing Figure 27) of rod unit 34.During around they self axis rotation, bolt 9a, 9b are tightened at main shaft 338 and slot 340.

Being equipped with roughly on the upper end of second plate 308, the pin of tunnel-shaped inserts plate 342 (seeing Figure 17).Stop pressing plate 346 is connected to pin by corresponding pin 344 and inserts plate 342.Pin 344 is inserted in pin and inserts in the corresponding pin insertion hole 348 that limits in the plate 342 (seeing Figure 21).

Connection device 300 as above-mentioned structure that enforcement connecting rod manufacture method according to the present invention is used.Describe the operation and the advantage of connection device 300 below in detail.

For backstay parts 34 and cap member 32, make piston rod 234 withdrawals of first cylinder 232, and the piston rod 258 of second cylinder 256 is shifted forward.When the piston rod 258 of second cylinder 256 shifted forward, second fastener 246 that is connected to Displacement plate 250 was shifted towards first cylinder 232 along guide rail 214.

When 246 displacements of second fastener, second keeper 262 is shifted towards the 3rd keeper 272, thereby is compressed in the helical spring 278 that extends between second keeper 262 and the 3rd keeper 272.

The small end 40 of rod unit 34 places on first bearing 218, and its big end 38 places on the 3rd bearing 222.Cap member 32 places on second bearing 220.

Then, activate first cylinder 232.Piston rod 234 travels forward, thereby causes pressing plate 230, connecting plate 228 and dull and stereotyped 226 that first fastener 224 is shifted towards second cylinder 256 along guide rail 214.First keeper 240 that is vertically mounted on dull and stereotyped 226 by two pads 236,238 is shifted towards second cylinder 256 in aperture 39.

When the displacement of first keeper 240, the flexure plane 244 of first keeper 240 and the first internal perisporium face S1 that limits aperture 39 against.When piston rod 234 further travels forward, first keeper 240 further displacement with towards second cylinder, 256 rod member 34.

Because the flexure plane 244 of first keeper 240 and the first internal perisporium face S1 shape complementarity that limits aperture 39 are swung around aperture 39 when travelling forward so prevented rod unit 34.

The 3rd internal perisporium face S3 of the qualification connecting hole 36 of rod unit 34 is the 3rd keeper 272 on the 3rd bearing 222 finally.Because the 3rd keeper 272, promptly the 3rd bearing 222 is fixedly mounted on side plate 216a, the 216b, so rod unit 34 is kept by the 3rd keeper 272.Prevented that this moment rod unit 34 from further travelling forward.

As previously discussed, the 3rd internal perisporium face S3 shape complementarity of the qualification connecting hole 36 of the flexure plane 270 of the 3rd keeper 272 and rod unit 34.Therefore, even rod unit 34 is swung around aperture 39 when travelling forward, the 3rd internal perisporium face S3 also can be guided by the flexure plane 270 of the 3rd keeper 272, thereby rod unit 34 is got back to its swing starting position.

The rod unit 34 from connecting rod 30 divisions is positioned at the appropriate location this moment.

Then, activate second cylinder 256 with withdrawal piston rod 258.Piston rod 258 separates with the head of screw rod 254, thereby discharges the pressure that second fastener 246 is subjected to from second cylinder 256.Elastic extension under the helical spring 278 energy stored effect therein, thus make second keeper 262 away from 272 displacements of the 3rd keeper.

The second internal perisporium face S2 of the qualification connecting hole 36 of the flexure plane 264 extruding cap members 32 of second keeper 262 of displacement.Cap member 32 is finally kept by L shaped framework 268 up to cap member 32 away from rod unit 34 displacements.

Because the flexure plane 264 and the second internal perisporium face S2 shape complementarity are swung around connecting hole 36 when displacement so prevent cap member 32.Thereby the plane of disruption of the cap member 32 that is kept by L shaped framework 268 is positioned to and aims at the plane of disruption of its rod unit of facing 34.In other words, rod unit 34 and cap member 32 hi-Fix relative to each other.

The piston rod 314 of displacement cylinder 310 travels forward.Because piston rod 314 is connected to bar connecting plate 223, positioner 210 is shifted towards door shape support 312 along guide rail 302a, 302b.

When the piston rod 314 of displacement cylinder 310 arrived its forward stroke terminal point, the vibration-damped component 328 on the side surface of big end 38 and cap member 32 and the medial surface of arm 326 was positioned to rough alignment each other.Afterwards, bar 322 withdrawals of lateral attitude restriction cylinder 320 are so that the position of the side surface of arm 326 big ends 38 of restriction and cap member 32.Therefore, big end 38 and cap member 32 are with hi-Fix more.

In above operating period, support 330a, 330b are directed on second plate 308 and are shifted along guide rail 304a, 304b, up to corresponding bolts hole 42a, the 42b position alignment of slot 340 with the connecting rod 30 of nut- runner 336a, 336b.

The respective end of support 330a, 330b is stoped by stop pressing plate 346, thereby makes nut-runner 336a, the 336b horizontal-extending that is supported on the L shaped strut 334 rather than the extension of tilting.

Thereby make base portion 212 motions that connecting rod 30 is travelled forward and during operation that big end 38 and cap member are located relative to each other when displacement cylinder 310 finishes it, the head that is screwed into bolt 9a, the 9b of bolt hole 42a, 42b by the workman is bonded on respectively in the slot 340.

When the engagement of bolt 9a, 9b is in slot 340, activate nut- runner 336a, 336b so that main shaft 338 rotations and utilize corresponding slot 340 rotating bolt 9a, 9b.

The external threaded surface of bolt 9a, 9b engages with the interior threaded surface of bolt hole 42a, 42b, thereby rod unit 34 and cap member 32 is secured to one another and dislocation can not occur.The condition of tightening of bolt 9a, 9b will be described below.

By above-mentioned connection device 300, rod unit 34 is by first keeper 240 and the 3rd keeper 272 location, and cap member 32 is by second keeper, 262 location.Because first keeper 240, second keeper 262 and the 3rd keeper 272 have respectively the corresponding flexure plane 244,264,270 with the 3rd internal perisporium face S3 shape complementarity of the qualification connecting hole 36 of the second internal perisporium face S2 of the qualification connecting hole 36 of the first internal perisporium face S1 that limits aperture 39, cap member 32 and rod unit 34, so prevented rod unit 34 and cap member 32 swings.

Therefore, the plane of disruption of the plane of disruption of rod unit 34 and cap member 32 is faced mutually in the mode of linear alignment each other.In other words, rod unit 34 and cap member 32 hi-Fix relative to each other.Therefore, rod unit 34 and cap member 32 can easily connect into connecting rod 30, can produce connecting rod 30 effectively and raising output.

Owing between first bearing 218 and the 3rd bearing 222, be provided with the gap, can insert and pass this gap when using positioner 210 as previously discussed, to apply lubricating oil to guide rail 214 so be used to apply the instrument of lubricating oil.Therefore, positioner 210 can easily be safeguarded.The gap that is arranged between first bearing 218 and the 3rd bearing 222 prevents effectively that also the weight of positioner 210 from increasing.

Shown in the connection device 300, first bearing 218 and the 3rd bearing 222 are depicted as separated from one another.Yet first bearing 218 and the 3rd bearing 222 can be overall structures.Specifically, first bearing than first bearing, 218 length can be set, and the small end 40 and the big end 38 of rod unit 34 can be set on this first long bearing.The 3rd keeper can separate with first bearing and can be vertically mounted on first bearing.

The condition of tightening of when the plane of disruption of cap member 32 and rod unit 34 is located relative to each other, bolt 9a, 9b among inserting bolt hole 42a, the 42b being tightened below with reference to flow chart description shown in Figure 23.

In the following description, bolt 9a, 9b according to angle-controlled tighten to handle tighten.Tighten processing according to angle-controlled, driving fit torque (snug torque) is set at 19.6Nm and bolt 9a, 9b turn over 90 degree.Tighten in the processing angle-controlled, be difficult to high accuracy and determine the driving fit torque.For the precision of tightening that improves bolt 9a, 9b is set up the following condition of tightening.Based on utilizing torque wrench to measure the experimental data that the workman obtains with the torque of pointing manually tight a bolt 9a, 9b, will tighten torque settings is 2Nm temporarily.

At first, activate nut- runner 336a, 336b with high speed rotating and the 9a that tights a bolt, 9b (step S21).

According to angle-controlled processing, when bolt 9a, 9b were tightened the anglec of rotation that surpasses 4400 degree at a high speed, the rotating speed of the slot 340 of main shaft 338 and nut- runner 336a, 336b reduced, thereby bolt 9a, 9b are with slowly run (step S22).At a high speed the anglec of rotation of switching to low speed is not limited to 4400 degree, but can be according to the assembly line of the type of connecting rod 30 and size and connecting rod 30 and different.

Bolt 9a, 9b are tightened to slowly run, thereby the plane of disruption of cap member 32 and the plane of disruption of rod unit 34 are moved towards one another.When the combination complimentary to one another of the surperficial uneven place of the plane of disruption of cap member 32 and rod unit 34, the plane of disruption of the plane of disruption of cap member 32 and rod unit 34 keeps contacting with each other.Dislocation between the cap member 32 that the contraction of cap member 32 causes during at this moment, because of connecting rod 30 divisions and the plane of disruption of rod unit 34 is proofreaied and correct.Because the dislocation between the plane of disruption of cap member 32 and rod unit 34 is proofreaied and correct, so cap member 32 and rod unit 34 keeps aiming at coaxially to each other, and the cap member 32 that causes because of the contraction of cap member 32 laterally distributes with the edge of the lateral dimension difference between the rod unit 34 about equally.When the bolt 9a, the 9b that tighten with low speed tighten torque when reaching the default torque of 2Nm, stop using nut-runner 136a, 136b and hold them in stand-by state (step S23) so that main shaft 338 and slot 340 stop the rotation.

The default torque of 2Nm is made as tightens torque temporarily.According to present embodiment, do not wait with tight a bolt time of 9a, 9b of corresponding nut- runner 336a, 336b, utilize torque wrench to measure the experimental data that the workman obtains with the torque capacity of pointing manually tight a bolt 9a, 9b and set and tighten torque temporarily but be based on.To reach moment of temporarily tightening torque (starting point) of 2Nm identical from the torque of tightening of bolt 9a, 9b for the rundown process of each bolt 9a, 9b.

Then, activate nut- runner 336a, 336b once more, reach the pre-determined torque of temporarily tightening the big 30Nm of torque (step S24) than 2Nm up to the torque of tightening of bolt 9a, 9b with the 9a that tights a bolt synchronously with one another, 9b.Because the torque of tightening of bolt 9a, 9b is about 40Nm when bolt 9a, 9b are tightened fully, so adopt the pre-determined torque of the 30Nm littler than the torque of 40Nm.According to the degree that promotes to remove fragment or discharge fragment, promptly secondary crack growth is perhaps selected than tighten the big pre-determined torque of torque temporarily according to which kind of adopts handle the grooming plane of disruption can remove the degree of fragment.

Then, unscrew bolt 9a, 9b by the counter-rotating predetermined angular, and when bolt 9a, 9b unscrew like this, detect the loaded-up condition (step S25) on bolt 9a, the 9b.Specifically, for example confirm between the interior threaded surface of the external threaded surface of bolt 9a, 9b and bolt hole 42a, 42b, whether to have held back impurity.If when unscrewing bolt 9a, 9b, be subjected to, that is,, then can confirm to have held back impurity if be higher than preset threshold value for unscrewing the torque that bolt 9a, 9b apply than common big resistance.

When some thread damages of the interior threaded surface of some thread damages of the external threaded surface of bolt 9a, 9b or connecting rod 30, can impurity trapped.

If surpass preset threshold value for unscrewing the torque that bolt 9a, 9b apply, judge that then bolt 9a, 9b normally tighten.Activate nut- runner 336a, 336b with along normal direction low speed rotation bolt 9a, 9b.Tight a bolt 9a, 9b tightens the driving fit torque (step S26) that torque reaches 19.6Nm up to it.

At last, rotate 90 degree and the 9a that tights a bolt, 9b (step S27).

According to present embodiment, low speed slowly tight a bolt 9a, 9b so that the plane of disruption of cap member 32 and rod unit 34 contacts with each other, thereby make the uneven place of the plane of disruption aligned with each other.Therefore, bolt 9a, 9b are tightened, and just as manually being tightened with finger by the workman, thereby the dislocation between the plane of disruption that the contraction of cap member 32 causes when dividing because of connecting rod 30 is proofreaied and correct.

According to present embodiment, manually tight a bolt experimental data that the torque capacity of 9a, 9b obtains with finger and preset and tighten torque temporarily based on utilizing torque wrench to measure the workman.To reach moment of temporarily tightening torque (starting point) of 2Nm identical from the torque of tightening of bolt 9a, 9b in the processing of tightening of each bolt 9a, 9b.Thereby, from 2Nm tighten torque temporarily, bolt 9a, 9b tighten synchronously with low speed, thereby suitably cap member 32 and rod unit 34 are engaged with each other.

For example, shown in Figure 24 A, be under the torque of 2Nm when a left side cooperates the plane of disruption (cooperate the right plane of disruption in the plane of disruption be in 2Nm down and cooperate the left plane of disruption in the plane of disruption to be under the 2Nm) time, cooperating the step dimension between the plane of disruption is not 0, and shown in Figure 24 B, be under the torque of 2Nm when the right side cooperates the plane of disruption (cooperate the right plane of disruption in the plane of disruption be in 2Nm down and cooperate the left plane of disruption in the plane of disruption to be under the 2Nm) time, cooperating the step dimension between the plane of disruption is not 0.

Specifically, when bolt 9a, 9b tightened temporarily, the plane of disruption of cap member 32 and rod unit 34 was not engaged with each other fully, but the dislocation between the plane of disruption is proofreaied and correct and the plane of disruption is aligned with each other.Then, bolt 9a, the 9b that temporarily tightens tightened synchronously with one another fully.

As a result, according to present embodiment, the dislocation between the cooperation plane of disruption of cap member 32 and rod unit 34 is proofreaied and correct, thereby the cooperation plane of disruption of cap member 32 and rod unit 34 is cooperated relative to each other certainly.

Describe the condition of tightening that bolt 9a, 9b with inserting bolt hole 42a, 42b tighten that is used for when the plane of disruption of cap member 32 and rod unit 34 is located relative to each other of another embodiment below in detail according to the present invention with reference to flow chart shown in Figure 25.Step S21 to S26 shown in Figure 25 is identical with the above-mentioned condition of tightening, and is not described in detail.

Tighten torque when reaching the driving fit torque (step S26) of 19.6Nm at the 9a that tights a bolt, 9b up to it, counter-rotating bolt 9a, 9b and they are unscrewed remove the fragment that produces or promotion and are released in and cooperate the fragment (step S27a) that produces in the plane of disruption in the cooperation plane of disruption of cap member 32 and rod unit 34.

Fragment can remove or promote its release as shown in figure 26.Specifically, can adopt a pair of brush 354 with corresponding dish 350a, 350b, side surface at dish 350a, 350b is attached with the silk 352 that metal (for example SUS) makes, can be by the brush 354 grooming cap members 32 that can rotate along assigned direction and the plane of disruption of rod unit 34.

Can be when the plane of disruption of bolt 9a, 9b difference inserting bolt hole 42a, 42b and cap member 32 and rod unit 34 be spaced from each other, by brushing the plane of disruption of 354 grooming cap members 32 and rod unit 34.Perhaps, can with bolt 9a, 9b respectively from bolt hole 42a, when 42b removes, by brushing the plane of disruption of 354 grooming cap members 32 and rod unit 34.

After removing fragment or promoting to discharge fragment, activate connection device 300 tighten torque temporarily so that bolt 9a, 9b are screwed to.Afterwards, the rotation of bolt 9a, 9b stops, and bolt 9a, 9b is screwed to synchronously than tighten the big pre-determined torque of torque temporarily then.

Under the condition of tightening according to another embodiment, low speed slowly tight a bolt 9a, 9b, thus the plane of disruption of cap member 32 and rod unit 34 is contacted with each other, thus make the uneven place of the plane of disruption aligned with each other.Therefore, bolt 9a, 9b are tightened, and just as manually being tightened with finger by the workman, thereby the dislocation between the plane of disruption that the contraction of cap member 32 causes when dividing because of connecting rod 30 is proofreaied and correct.

Under the condition of tightening, manually tight a bolt experimental data that the torque capacity of 9a, 9b obtains with finger and preset and tighten torque temporarily based on utilizing torque wrench to measure the workman according to another embodiment.To reach moment of temporarily tightening torque (starting point) of 2Nm identical from the torque of tightening of bolt 9a, 9b in the processing of tightening of each bolt 9a, 9b.Thereby, from 2Nm tighten torque temporarily, bolt 9a, 9b tighten synchronously with low speed, thereby suitably cap member 32 and rod unit 34 are connected to each other.

For example, shown in Figure 24 A, be under the torque of 2Nm when a left side cooperates the plane of disruption (cooperate the right plane of disruption in the plane of disruption be in 2Nm down and cooperate the left plane of disruption in the plane of disruption to be under the 2Nm) time, cooperating the step dimension between the plane of disruption is not 0, and shown in Figure 24 B, be under the torque of 2Nm when the right side cooperates the plane of disruption (cooperate the right plane of disruption in the plane of disruption be in 2Nm down and cooperate the left plane of disruption in the plane of disruption to be under the 2Nm) time, cooperating the step dimension between the plane of disruption is not 0.

Specifically, when bolt 9a, 9b tightened temporarily, the plane of disruption of cap member 32 and rod unit 34 was not engaged with each other fully, but the dislocation between the plane of disruption is proofreaied and correct and the plane of disruption is aligned with each other.Then, bolt 9a, the 9b that temporarily tightens tightened synchronously with one another fully.

In addition, under the condition of tightening according to another embodiment, when the plane of disruption with the plane of disruption of cap member 32 and rod unit 34 is controlled under the pre-determined torque, they are contacted with each other, to remove the fragment that in the cooperation plane of disruption of cap member 32 and rod unit 34, produces or to promote to discharge this fragment.

For example, shown in Figure 13 A to Figure 13 C, when big end 38 was fractured into cap member 32 and rod unit 34, main crackle 200 was propagated and the generation brittle fracture.Between main crackle 200 propagation periods, main crackle 200 branches into little secondary crackle 202 easily.When connecting rod 30 is assembled in the internal combustion engine maybe when being combined with the internal combustion engine of connecting rod 30, secondary crackle 202 growth or co-propagate, thus almost discontiguous regional 204 (seeing Figure 13 B) between the plane of disruption of the plane of disruption of cap member 32 and rod unit 34 appear.The zone is 204 very crisp, makes to regional 204 imposed loads (stress) time, and zone 204 comes off as fragment, shown in Figure 13 C.

Under the condition of tightening, the torque of tightening of the plane of disruption of the plane of disruption of combined hat parts 32 and rod unit 34 used bolt 9a, 9b is controlled according to another embodiment.By the torque of tightening of such control, the plane of disruption of cap member 32 and the plane of disruption of rod unit 34 are contacted with each other, then by brushing 354 groomings to remove the fragment that in the plane of disruption, produces or to promote to discharge this fragment.

As previously discussed, under the condition of tightening, the torque of tightening of the plane of disruption of the plane of disruption of combined hat parts 32 and rod unit 34 used bolt 9a, 9b is controlled according to another embodiment.By the torque of tightening of such control, the plane of disruption of cap member 32 and the plane of disruption of rod unit 34 are contacted with each other, then by brush 354 groomings.Therefore, even produce fragment in the plane of disruption, also removable fragment or promotion discharge this fragment.

Remove the fragment that in the plane of disruption, produces or promote the processing that discharges this fragment to be not limited to carry out grooming by brushing 354.Can remove the fragment that produces in the plane of disruption by adhesive tape, suction machine or vibrator alternatively.Specifically, when using adhesive tape, adhesive tape is put on the plane of disruption peel off and remove fragment from the plane of disruption then from the plane of disruption.When using suction machine, apply negative pressure and remove fragment to the plane of disruption from the plane of disruption by suction machine.Can both remove fragment or promote to discharge this fragment reliably from the plane of disruption reliably in either case.

After removing fragment or having promoted to discharge this fragment, make the cooperation plane of disruption of cap member 32 and rod unit 34 separated from one another, thereby fragment is discharged smoothly from the plane of disruption.

As a result, under the condition of tightening according to this another embodiment, the dislocation between the cooperation plane of disruption of cap member 32 and rod unit 34 is proofreaied and correct, thereby the cooperation plane of disruption of cap member 32 and rod unit 34 is relative to each other cooperated certainly.In addition, can successfully remove the fragment that produces in the cooperation plane of disruption or successfully promote this fragment of release, and can not damage the structure of the plane of disruption.

Though illustrated and described in detail some of the preferred embodiment of the invention, should understand and under the situation that does not break away from the claims scope, to carry out various modifications and changes to the present invention.

Claims (19)

1. equipment that is used to make connecting rod, this equipment by integrally formed connecting rod (30) with big end (38) and small end (40), be located at the connecting hole (36) in the described big end (38) on a pair of expansion part and described expansion part is expanded away from each other described big end (38) is split into cap member (32) and rod unit (34) thus make connecting rod, this equipment comprises:

Workpiece orientation maintaining means (52), this workpiece orientation maintaining means has the fixed station (62) that is fixedly mounted on the pedestal (60), and become with described fixed station (62) in the face of relation arrange and can towards with movable table (64) away from described fixed station (62) horizontal movement, described workpiece orientation maintaining means (52) is arranged to described connecting rod (30) set for and is positioned at the precalculated position, make a expansion part in the described expansion part near the described rod unit (34) that is fixed to described fixed station (62), another expansion part is near can be with the described cap member (32) of described movable table (64) displacement, and described workpiece orientation maintaining means (52) is arranged to keep the described connecting rod (30) set like this;

Load maintainer (58), this load maintainer be used for along make a described expansion part and described another expansion part away from each other travel direction apply breaking load so that described big end (38) division; And

Fragment removes/discharges promotion mechanism, this fragment removes/discharges and promotes mechanism to be used for being split into described cap member (32) and described rod unit (34) in described big end (38) when described cap member (32) and described rod unit (34) remain on described movable table (64) and the described fixed station (62) respectively described movable table (64) to be shifted towards described fixed station (62) afterwards, so that the plane of disruption of the plane of disruption of described cap member (32) and described rod unit (34) contacts with each other, be released in the fragment that produces in the described plane of disruption in order to remove the fragment or the promotion that in the described plane of disruption, produce.

2. equipment according to claim 1, wherein, described workpiece orientation maintaining means (52) comprising:

First supporting mechanism (130a, 130b), this first supporting mechanism is used for the shoulder towards the close described cap member (32) of described small end (40) the described big end of extruding (38); And

Second supporting mechanism, this second supporting mechanism is used for pushing the described first supporting mechanism (130a downwards, the opposed end of the end that engages with described connecting rod (30) away from this first supporting mechanism 130b), thus clamp described first supporting mechanism (130a, 130b);

(130a 130b) is fixed to described movable table (64) with described second supporting mechanism to described first supporting mechanism, is used for and described movable table (64) displacement synchronously.

3. equipment according to claim 2, wherein, described second supporting mechanism comprises: cylinder (146a, 146b), described cylinder has piston and is connected to the piston rod of this piston; And

(134a, 134b), described has in its described end and described first supporting mechanism (130a, the compressive surface that inclined surface 130b) engages to be connected to the piece of the far-end of described piston rod.

4. equipment according to claim 1, this equipment also comprises:

Pre-load mechanism (56), this pre-load mechanism are used for applying along the direction that described expansion part is separated each other and preload, with so that described expansion part presses the inner surface that wherein is limited with connecting hole (36) of described big end (38),

Wherein, after applying described preloading by described pre-load mechanism (56), described second supporting mechanism activated to clamp described first supporting mechanism.

5. equipment according to claim 1, wherein, described load maintainer (58) comprising:

Be used to be pressed into the wedge (122) between the described expansion part; And

Be used for the single actuator (156) of the described wedge (122) of pulling between described expansion part downwards.

6. equipment according to claim 1, wherein, described workpiece orientation maintaining means (52) comprising:

First workpiece support (78), this first workpiece support is arranged on the described fixed station (62), is used for engaging with the described small end (40) of described connecting rod (30) and compressing axially described small end (40) towards described big end (38); And

One cylinder (72), this cylinder be used to make described first workpiece support (78) towards with move away from described small end (40).

7. equipment according to claim 6, wherein, described first workpiece support (78) has junction surface (80) on the one end, and this junction surface is used for engaging with the described small end (40) of described connecting rod (30).

8. equipment according to claim 1, wherein, described workpiece orientation maintaining means (52) comprising:

Second workpiece support (104), this second workpiece support is arranged on the described fixed station (62), is used for pushing the upper surface of the described big end (38) of described connecting rod (30) downwards; And

One cylinder (94), this cylinder are used to make described second workpiece support (104) to pass through predetermined angular around pin (100) angular movement.

9. equipment according to claim 1, wherein, described fragment removes/discharges and promotes that mechanism comprises:

A pair of standby cylinder (153,155), described standby cylinder are fixed on the sidewall (68a) of the carriage (68) that links to each other with described base portion (60), are used to make described movable table (64) axially displaced along described connecting rod (30).

10. method that is used to make connecting rod, this method by integrally formed connecting rod (30) with big end (38) and small end (40), be located at the connecting hole (36) in the described big end (38) on a pair of expansion part and described expansion part is expanded away from each other described big end (38) is split into cap member (32) and rod unit (34) thus make connecting rod, this method may further comprise the steps:

The described rod unit (34) of described connecting rod (30) is set on the fixed station (62), and with the described cap member (32) of described connecting rod (30) be set in can movable table (64) with respect to described fixed station (62) motion on;

Utilize first supporting mechanism to push described cap member (32), with the shoulder of the described cap member of cross-brace (32) towards described small end (40);

Activate second supporting mechanism with towards described first supporting mechanism of described cap member (32) extruding, thereby described cap member (32) is fixed between the expansion part that the close described cap member (32) in described first supporting mechanism and the described expansion part locatees;

Under described cap member (32) is fixed on state between the described expansion part of close described cap member (32) location in described first supporting mechanism and the described expansion part, so that described big end (38) splits into described cap member (32) and described rod unit (34), make described cap member (32) and described movable table (64) displacement synchronously to described expansion part imposed load simultaneously; And

Being split into described cap member (32) and described rod unit (34) in described big end (38) makes described movable table (64) be shifted towards described fixed station (62) when described cap member (32) and described rod unit (34) remain on described movable table (64) and the described fixed station (62) respectively afterwards, so that the plane of disruption of the plane of disruption of described cap member (32) and described rod unit (34) contacts with each other, be released in the fragment that produces in the described plane of disruption in order to remove the fragment or the promotion that in the described plane of disruption, produce.

11. method according to claim 10, wherein, utilize pre-load mechanism (56) to described expansion part apply preload after, activate described second supporting mechanism so that described cap member (32) is fixed between the described expansion part of close described cap member (32) location in described first supporting mechanism and the described expansion part.

12. method according to claim 10, wherein, after described cap member (32) is fixed between the described expansion part of close described cap member (32) location in described first supporting mechanism and the described expansion part, only apply breaking load so that described wedge (122) is pressed between the described expansion part to described wedge (122) by the actuator (156) that is used to spur wedge (122).

13. method according to claim 10, wherein, removing/discharge promotion mechanism by fragment makes described movable table (64) be shifted towards described fixed station (62), this fragment removes/discharges and promotes that mechanism comprises a pair of standby cylinder (153,155), described standby cylinder is fixed on the sidewall (68a) of the carriage (68) that links to each other with described base portion (60), be used to make described movable table (64) axially displaced along described connecting rod (30), described standby cylinder (153,155) can activate substantially simultaneously so that described cap member (32) with described movable table (64) displacement, thereby make the plane of disruption of described cap member (32) and the plane of disruption of the described rod unit (34) that kept by described fixed station (62) contacts with each other.

14. method according to claim 10, wherein, after the described plane of disruption of the described plane of disruption that makes described cap member (32) and described rod unit (34) contacts with each other, the thrust that is applied to the described plane of disruption of described cap member (32) and described rod unit (34) becomes and increases level, is released in the fragment that produces in the described plane of disruption thereby can remove the fragment or the promotion that produce in the described plane of disruption.

15. method that is used to make connecting rod, this method is by integrally formed connecting rod (30) with big end (38) and small end (40), be split into cap member (32) and rod unit (34) with described connecting rod (30), afterwards under the state that the plane of disruption of the plane of disruption of described cap member (32) and described rod unit (34) is fitted to each other with pair of bolts (9a, 9b) described cap member (32) and described rod unit (34) are tightened together and make connecting rod, this method may further comprise the steps:

Rotate described bolt (9a, 9b) so that the described plane of disruption of the described plane of disruption of described cap member (32) and described rod unit (34) move towards one another, thereby the described plane of disruption of described cap member (32) and the described plane of disruption of described rod unit (34) are contacted with each other, make that the uneven place of the described plane of disruption of the described plane of disruption of described cap member (32) and described rod unit (34) is complementally aligned with each other, and the described bolt (9a that is tightening by rotation, the torque of tightening 9b) reaches the described bolt (9a that stops the rotation when temporarily tightening torque based on experimental data is predetermined, 9b) and (9a 9b) remains on stand-by state with described bolt; And

(9a, 9b), (9a, the torque of tightening 9b) reaches more temporarily than the described big pre-determined torque of torque of tightening up to described bolt to tighten described bolt synchronously with one another.

16. method according to claim 15, wherein, described tighten temporarily torque comprise with finger tight described bolt (9a, the torque of the torque correspondence that produces in the time of 9b).

17. method according to claim 15, wherein, tightening described bolt (9a synchronously with one another, 9b) up to described bolt (9a, the torque of tightening 9b) reaches more temporarily than described tightening and unscrews described bolt (9a after the big pre-determined torque of torque, 9b), the fragment to produce in the described plane of disruption that removes the described plane of disruption that the fragment that produces or promotion be released in described cap member (32) and described rod unit (34) in the described plane of disruption of the described plane of disruption of described cap member (32) and described rod unit (34).

18. method according to claim 17 wherein, removes described fragment or promotes to discharge described fragment by the described plane of disruption of the described cap member of grooming (32) and the described plane of disruption of described rod unit (34).

19. method according to claim 17, this method is further comprising the steps of:

After removing described fragment or promoting to discharge described fragment, with described bolt (9a, 9b) be screwed to and tighten torque temporarily, stop the rotation described bolt (9a, 9b) and (9a 9b) remains on stand-by state with described bolt, then tighten described bolt (9a synchronously with one another, 9b), (9a, the torque of tightening 9b) reaches more temporarily than the described big pre-determined torque of torque of tightening up to described bolt.

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