JP2967370B2 - Processing equipment for connecting rods - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing device for forming an oil hole in a small end of a connecting rod.

[0002]

2. Description of the Related Art As shown in FIGS.
Small end W of swing rod W₁At a 90 ° angle to each other
Two oil holes h₁, H_TwoIs the piston
Hole W _TwoMust be formed to face the center of
Also small end W₁Must be formed at the center in the thickness direction.

Conventionally, the processing of the oil holes h ₁ and h ₂ has been performed by positioning and fixing a pallet supporting the connecting rod W to a processing apparatus.

[0004]

[SUMMARY OF THE INVENTION However, the type of connecting rod W as indicated by the chain line is changed, not only it is necessary to replace the pallets according to the size of the connecting rod W, the small end W ₁ There is a problem that the pallet needs to be repositioned according to the change in the thickness and the diameter, and the operation requires much time and labor.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a connecting rod processing apparatus capable of easily and precisely drilling an oil hole at a predetermined position even if the size of the connecting rod changes. The purpose is to provide.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a connecting rod processing apparatus for forming an oil hole at a small end of a connecting rod, the apparatus comprising a plurality of supporting rods for supporting the connecting rod. A rotary index plate provided with clamp seats at equal intervals in the circumferential direction, a clamping means for positioning and fixing a connecting rod supported by the clamp seat with reference to the center of its small end, and a rotary index plate provided adjacent to the rotary index plate And
A lower base plate that can be raised and lowered according to the thickness of the connecting rod that is positioned and fixed to the clamp seat, an upper base plate that is supported on the lower base plate so as to be able to approach and separate from the rotary index plate, provided, and a main spindle that faces the center of the small end of the positioning fixed connecting rod, the lower baseplate
Can move up and down along the guide rails arranged diagonally
And the stop position of the lower base plate is
It is determined by contact with any of a plurality of different positioning pins.
The feature to be control.

[0007]

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 3, reference numeral 1 denotes a circular rotary index plate, which is driven by a drive mechanism (not shown) to carry in a workpiece P ₁ , a first processing position P ₂ , a second processing position P ₃ , and a work unloading position P. Indexed at 90 ° intervals between _four . Four connecting rods W as a work are placed on the upper surface of the rotary index plate 1, and are clamped by the _first and second clamping means C ₁ and C ₂ provided on the rotary index plate 1, respectively.

FIGS. 4 to 6 show a small connecting rod W. FIG.
Edge W₁Clamp means C for clamping₁To
As shown, the first clamping means C₁Drive source for the
All the rotors 2 have a cylindrical main body 3 and an upper part from the main body 3.
It comprises an output rotation shaft 4 projecting downward, and this output rotation
The shaft 4 is moved in both left and right directions with respect to the main body 3 by hydraulic pressure.
It is driven to rotate. Integrated with the lower end of the output rotary shaft 4 of the rotor 2
The first clamp means C₁Rise
The cylinder mechanism 6 as a lowering drive source cannot rotate relative to the cylinder mechanism 6 and
Slide up and down freely. That is, the cylinder mechanism 6
The upper side through which the force rotating shaft 4 passes through the bearings 7 and 8
The end member 9 and the piston 5 connected to the lower portion
The cylinder member 10 to be fitted and the lower part of the cylinder member 10
The lower end member 11 for closing the end is constituted by a piston
Slot 5 formed on the lower surface of 5 ₁Is the lower end member 11
Convex portion 11 protruding from the upper surface of₁Movably engage with
On the upper surface of the piston 5, a cylinder member 10 and
Hydraulic pressure through an oil passage 12 penetrating the lower end member 11.
The lower surface of the piston 5 and the slot 5₁
Through the oil passage 13 formed in the lower end member 11 on the bottom surface of the
Hydraulic pressure works.

A cylindrical bracket 14 is integrally fixed to the lower surface of the main body 3 of the rotor 2, and a clamp arm 15 is further fixed to the lower surface of the bracket 14. The bracket 14 and the clamp arm 15 are disposed so as to cover the outer periphery of the output rotary shaft 4 of the rotor 2, and a bearing 16 is provided between the inner peripheral surface of the clamp arm 15 and the output rotary shaft 4. A downwardly tapered conical clamp claw 17 is provided on the lower surface of the distal end of the clamp arm 15, and the clamp claw 17 allows the small end W ₁ of the connecting rod W mounted on the clamp seat 33 (see FIG. 3) to be formed. piston pin hole W ₂ is pressed by the clamp. A positioning recess 18 is provided on the lower surface of the clamp arm 15 opposite the clamp claw 17, and the positioning recess 18 is provided on the upper surface of the upper end member 11 of the cylinder mechanism 6.
A positioning pin 19 that can be fitted into the positioning mechanism 2 is provided.
0 is configured.

A base 2 provided on the upper surface of the main body 3 of the rotor 2
Two brackets 22 and 23 are fixed to 1, and stopper bolts 24 and 25 are provided on each bracket 22 and 23. On the other hand, a stopper piece 26 that abuts against the stopper bolts 24 and 25 is fixed to the upper end of the output rotary shaft 4 that penetrates the base 21 upward.

A bracket 28 provided on a fixed frame 27 extending above the base 21 has a rotation position detection sensor 30 facing a detection dog 29 provided on the upper surface of the base 21 for detecting a rotation position, and the stopper An ascending / descending position detecting sensor 32 is provided opposite to the ascending / descending position detecting dog 31 provided on the upper surface of the piece 26.

[0014] Then the second structure of the clamping mechanism C ₂ will be described with reference to FIGS. 3 and 7. The second clamping mechanism C ₂ is different from the first clamping mechanism C _{1 in} that the connecting rod W
Radial with respect to position the center of the piston pin hole W ₂ the small end W ₁ by clamping, by clamping the big end W ₃ of the connecting rod the axis of the connecting rod W of the rotary index plate 1 Position. That is, a V-block 34 having a V-groove 34 ₁ at _one end thereof capable of pressing the large end W ₃ of the connecting rod W is supported on the V-block 34 so as to be slidable in the radial direction of the rotary index plate 1. upper end engages the groove 34 _second lever 36 which is pivotally supported lower end by a pin 35 to,
The lever 36 and an output rod 38 of a cylinder 37 provided on the lower surface of the clamp seat 33 are connected to both ends of a link 39 via two pins 40 and 41.

[0015] Next 8-11 oil holes h ₂ to the small end W ₁ of the connecting rod W of clamping onto the rotary index plate 1 of the clamp seat 33 on the basis of,
The structure of the processing unit U which drilled h ₂ will be described. On the upper surface of the base 42, an inclined base 43 that is slightly inclined is provided so that the side away from the rotary index plate 1 is higher. Two guide rails 44 laid on the inclined table 43
A lower base plate 47 is supported by a slide guide 45 slidably engaged with the base plate 47 via a wedge-shaped spacer 46. An output rod 50 of a cylinder 49 supported on one upper surface of the inclined base 43 is connected to one of a pair of positioning blocks 48 fixed to the left and right sides of the lower base plate 47, whereby the lower base plate 47 is connected to the guide rail 44. Up and down diagonally along.

Brackets 5 provided on both left and right sides of base 42
A rotary disk 53 indexed at 90 ° intervals by a rotor 52 is supported on _{1, and four} positioning pins 541 to 544 having different lengths are planted on the rotary disk 53 in a forward direction. On the other hand, on a pair of positioning blocks 48 provided on the lower base plate 47, positioning pins 55 which can be in contact with any one of the _four positioning pins 54 _{1 to} 54 ₄ indexed by the rotor 52 are planted backward. Is established. Therefore, moving the lower base plate 47 rearward and upward by the cylinder 49, movement of the lower base plate 47 is stopped at a position where the positioning pin 55 is brought into contact with one of the positioning pins 54 _{1-54 4.}

The left side provided on the upper surface of the lower base plate 47
The guide rail 5 is attached to the pair of right guide rail support members 56.
7 are laid and the guide rail 57 has a slide guide.
The upper base plate 59 slides in the front-rear direction via the door 58
Freely supported. In front of the lower base plate 47
Bracket 60 provided at the end and bracket 6 provided at the rear end
A pair of left and right guide bars 62 are provided between the guide rails.
57, and extends along the guide bar 62.
A pair of slide guide supports are provided on the lower surface of the base plate 59.
The slide guide 64 supported via the holding member 63 guides
Is done. That is, the upper base plate 59 is
Both the lower rail 57 and the guide bar 62
It is supported movably in the front-back direction with respect to the plate 47.
You. At this time, the slide guide support member 63
That the guide 64 interferes with the lower base plate 47;
To prevent it, the lower base plate 47 has an opening
47 ₁Is formed.

An output rod 67 of a cylinder 66 supported by a bracket 61 provided on a lower base plate 47 via a cylinder support member 65 is connected to a connection plate 75 connecting the pair of slide guide support members 63. The upper base plate 59 is driven.

[0019] The left and right sides of the motor 68 provided on the upper surface of the upper base plate 59, the connecting rod W at the first processing position P ₂ of the rotary index plate 1
Spindle 70 having a cutting tool 69 for machining
When the second main spindle 71 having a cutting tool 69 for machining the connecting rod W in the second processing position P ₃ is arranged. And the cutting tool 6 of the both spindles 70, 71
To 9, the driving force of the motor 68 is transmitted via pulleys 72 and 73 and a belt 74.

Next, the operation of the embodiment of the present invention having the above configuration will be described.

At the work loading position P ₁ , the clamp seat 3 of the rotary index plate 1 is moved by a loader (not shown).
When 3 on the connecting rod W is carried by the first first clamping mechanism C ₁ is clamped in the small end W ₁ of the connecting rod W is performed in the following procedure.

In the state before the start of clamping, the lower surface of the piston 5 and the piston 5
Of the bottom surface of the slit groove 5 ₁ by the action of hydraulic, output rotary shaft 4 is pushed up rotor 2 and the clamp arm 15 has risen to the solid line position in FIG. 4. At this time, as shown in FIG. 5, one stopper bolt 24 provided on the base 21 is in contact with the stopper piece 26, and the clamp arm 15 is located at a position off the upper part of the connecting rod W.

[0023] rotating the output rotary shaft 4 to drive the rotor 2 from this state with respect to the main body portion 3, a slit groove 5 ₁ the lower end member which is formed on the output rotary shaft 4 and the piston 5 of the integral because it is restricted to rotational engagement with the protrusion 11 ₁ formed in 11, the main body portion 3 of the rotor 2 by the reaction
6 rotates counterclockwise to the position shown in FIG. 6, and the other stopper bolt 25 contacts the stopper piece 26. At the same time, the rotation of the rotor 2 is stopped by the detection of the detection dog 29 provided on the base 21 by the rotation position sensor 30, and the clamp pawl 17 provided on the clamp arm 15 is connected to the connecting claw placed on the clamp seat 33. It stops above the small end W ₁ of the rod W.

Subsequently, when hydraulic pressure is applied to the upper surface of the piston 5 through the oil passage 12 of the cylinder mechanism 6, the output rotary shaft 4
Is pushed down, and the rotor 2 and the clamp arm 15 descend to the chain line position in FIG. In the process of lowering the clamp arm 15, a positioning recess 18 formed in the clamp arm 15 is moved to a positioning pin 19 provided in the upper end member 9.
To accurately position the rotational position of the clamp arm 15 and prevent the clamp arm 15 from tilting due to a load at the time of clamping. When the clamp arm 15 is further lowered, the clamp claw 17 is fitted into the piston pin hole W ₂ of the small end portion W ₁ of the connecting rod W, clamp the small end W ₁ of the connecting rod W on the clamping seat 33 I do. In this way, the clamp of the small end portion W ₁ of the connecting rod W is completed,
The detection dog 31 provided on the base 21 is used for the elevation position detection sensor 3.
2, the drive of the cylinder mechanism 6 is stopped.

[0025] Then, the second cylinder 37 of the clamp mechanism C ₂ is contracted by sliding the V-block 34 radially outward of the rotary index plate 1, large end W of the connecting rod W by the V groove 34 ₁ Press ₃ . Thus with the connecting rod W is the center of the piston pin hole W ₂ of the small end W ₁ is positioned at a predetermined position, the axis is positioned in the radial direction of the rotary index plate 1, yet the size of the connecting rod W regardless, the direction of the axis of the center position and the connecting rod W of the piston pin hole W ₂ is constant.

As described above, the connecting rod W
When the rotary index plate 1 is turned
90 ° indexed in the measuring direction, the connecting
Rod W is in the first processing position P_TwoReach At this time,
By driving the rotor 52 of the processing unit U, four
Positioning pin 54₁~ 54_FourConnectors to be processed
Positioning pin corresponding to the size of the towing rod W (example
For example, positioning pin 54 ₁) Is set in the positioning block 48.
Indexed so as to face the positioning pin 55
It is.

In this state, when the cylinder 49 is extended and the lower base plate 47 is moved rearward and upward along the inclined guide rails 44, the positioning pins 55 provided on the positioning block 48 are positioned to a predetermined length. the pin 54 ₁ in contact, the movement of the lower base plate 47 is stopped at that position. At this time, the lower base plate 4
7 moves obliquely along the inclined guide rails 44, the rearward of the base 42 increases as the moving distance increases.
, And the rising distance is determined in advance so that the cutting tool 69 of the spindle spindles 70, 71 has a height corresponding to the thickness of the connecting rod W positioned on the rotary index plate 1.

When the lower base plate 47 is positioned at a predetermined height in this manner, the upper base plate 59 supported by the lower base plate 47 via the guide rail 57 and the guide bar 62 is pressed by the cylinder 66 to advance. I do. As a result, the upper base plate 59
The first cutting tool 69 of the main spindle 70 provided to the oil hole h ₁ is formed in the small end W ₁ of the connecting rod W at the first processing position P _2. At the same time, the cutting edge 69 of the second spindle 71 applies an oil hole h ₂ to the small end W ₁ of another connecting rod W already drilled in the oil hole h ₁ and waiting at the second processing position P _3. Is drilled.

Since the height of the cutting tool 69 of each of the spindles 70 and 71 is adjusted according to the size of the connecting rod W as described above, the oil hole h
_1, h ₂ a can be correctly formed in the thickness direction center of the small end portion W _1. Moreover, since the connecting rod W is that the center of the piston pin hole W ₂ is positioned on the reference,
The oil holes h ₁ and h ₂ can be correctly drilled with the center of the piston pin hole W ₂ facing.

The two oil holes h ₁ while passing through the first processing position P ₂ and the second processing position P ₃ as described above,
connecting rod W that the h ₂ drilled, after being relieved of clamping in dispensing position P _4, paid out from the rotary index plate 1 with unloader (not shown).

When the size of the connecting rod W to be processed is changed, the rotor 52 of the processing unit U is driven each time, so that the positioning pins 54 _{1 to} 54 _{4 of} the length corresponding to the connecting rod W are moved. Be indexed.

Although the embodiments of the present invention have been described in detail, the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the present invention described in the appended claims. It is possible to make design changes.

[0033] For example, the number of positioning pins 54 _{1-54 4} indexed by the rotor 52 is not limited to four, and can be suitably changed. Further, in the embodiment, the processing unit U is provided with the two spindle spindles 70 and 71 and simultaneously drills the _two oil holes h ₁ and h _2. However, one oil hole is formed by a single spindle spindle. It is of course possible to drill.

[0034]

According to the onset bright as the foregoing, the connecting rod which is supported on the clamping seat of the rotary index plate, since the positioning and fixing by clamping means with respect to the center of the small end, the connecting Even if the diameter of the small end changes due to the change of rod model, the oil hole can always be correctly drilled toward the center.
Moreover, even if the thickness of the small end of the connecting rod changes, the height of the main spindle can be changed accordingly.Therefore, always drill an oil hole in the center of the small end in the thickness direction. Can be.

In particular, the lower base plate is obliquely arranged.
It can be moved up and down along the installed guide rail,
When the stop position of the base plate is
Since it is regulated by contact with any of the positioning pins,
Select the positioning pin of the length corresponding to the type of the connecting rod to be processed from the multiple positioning pins of different lengths, and connect the height of the main spindle by simply contacting the lower slide base with the positioning pin. The small end of the rod can be positioned at the center in the thickness direction, and as a result, it is possible to quickly respond to a model change.

[Brief description of the drawings]

FIG. 1 is a side view of a connecting rod.

FIG. 2 is a plan view of a connecting rod.

FIG. 3 is a plan view of a rotary index board.

FIG. 4 is a sectional view taken along line 4-4 in FIG. 3;

FIG. 5 is a view in the direction of arrows in FIG. 4;

FIG. 6 is an explanatory diagram of an operation corresponding to FIG. 5;

FIG. 7 is a sectional view taken along line 7-7 of FIG. 3;

FIG. 8 is a plan view of a processing unit.

9 is a view in the direction of arrow 9 in FIG. 8;

FIG. 10 is a sectional view taken along line 10-10 of FIG. 8;

11 is a sectional view taken along line 11-11 of FIG. 10;

[Explanation of symbols]

1 ··· Rotary index board 33 ··· Clamp seat 44 ··· Guide rail 47 ··· Lower base plate 54 ₁ ··· Positioning pin 54 ₂ ··· Positioning pin 54 ₃ ··· Positioning pin 54 ₄ ··· Positioning pin 59 ... upper base plate 70 ... first main spindle 71 ... second main spindle C ₁ ... first clamping means C ₂ ... second clamping means h ₁ ... oil holes h ₂ ·・ ・ Oil hole W ・ ・ ・ ・ Connecting rod W ₁・ ・ ・ Small end

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B23B 41/00 B23B 39/04

Claims (1)

(57) [Claims] 1. A processing device of a connecting rod for drilling small end of the connecting rod (W) to (W ₁₎ to the oil holes (h _1, h _2), a plurality of supporting the connecting rod (W) Rotary indexing plate (1) provided with clamp seats (33) at equal intervals in the circumferential direction, and connecting rod (W) supported on clamp seat (33) with reference to the center of its small end (W ₁ ). Clamping means (C ₁ , C
₂ ), a lower base plate (47) provided adjacent to the rotary index plate (1) and movable up and down in accordance with the thickness of the connecting rod (W) positioned and fixed to the clamp seat (33); An upper base plate (59) supported on the base plate (47) so as to be able to approach and separate from the rotary index plate (1), and the connecting rod (W) provided on the upper base plate (59) and fixed in position. ) and a facing main spindle (70, 71) in the center of the small end portion (W ₁₎ of said lower base plate (47) is disposed obliquely
It can move up and down along the guide rail (44),
Stop position of the base plate (47) is different in length
Those with any of a plurality of positioning pins (54 ₁ to 54 ₄₎
Characterized in that it is regulated by the contact, the processing equipment of the connecting rod.