JPS6221374Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a crankshaft oil hole machining device, and more particularly to a crank shaft oil hole machining device.

Conventionally, when drilling oil through holes in the journal section of a crankshaft in the diametrical direction, a processing unit having a number of spindles corresponding to the number of journals was placed on one side of the crankshaft that was set at the processing position. This machining unit is designed to machine oil holes from one side of the journal. This is equipped with a device that presses the pin portion of the crankshaft carried into the oil hole machining station to determine the rotational phase, and a device that clamps the journal portion after the phasing is determined by this device. This is because the oil hole machining unit is arranged opposite to the crankshaft on the side opposite to the installation side. Therefore, drilling the oil hole in the journal of the crankshaft can only be done from one side, which not only takes time but also increases the takt time of the crankshaft processing line. It was hot.

The present invention solves the above-mentioned conventional drawbacks, and is an oil hole machining device for a crankshaft that enables oil hole machining on the processed part of the crankshaft from both sides, thereby increasing the speed of oil hole machining. The purpose is to provide

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

1 to 5 show an example of a crankshaft oil hole machining device according to the present invention. In the figure, reference numeral 1 denotes a bed that is long in the left and right direction, and a jig body 3 that supports the crankshaft 2 is installed upright in the center of the bed 1. On the left and right are processing units 4 and 5 that machine oil holes for the crankshaft 2.
are arranged symmetrically.

The machining units 4 and 5 are provided with spindle heads 8 and 9 provided on their respective bases 6 and 7 so as to be movable relative to the crankshaft 2. The number of spindles 10 and 11 corresponding to the number of journal parts 2a are provided horizontally protruding from the head end toward the journal part 2a, and these opposing spindles 10 and 11 are on the same axis, Cutting tools 12 and 13 for drilling oil holes are attached to the tips of the spindles 10 and 11, respectively, and the spindles 10 and 11 are driven to rotate by motors 14 and 15 mounted on spindle heads 8 and 9, respectively. Furthermore, the spindle heads 8 and 9 are moved forward and backward by forward and backward motors 16 and 17 installed on the bases 6 and 7, respectively.

As shown in FIGS. 2 and 3, the jig main body 3 includes a pair of support portions 18, 1 extending diagonally upward corresponding to each journal portion 2a of the crankshaft 2.
9 are provided in a protruding manner, and at the tips of the respective support portions 18 and 19 are receiving members 20 and 21 that engage with the lower surface side of the journal portion 2a and support the entire crankshaft 2.
are provided protrudingly, and guide bush mounting parts 22 and 23 are provided at the tops of the tips of the support parts 18 and 19 to face the journal part 2a, and these mounting parts 22 and 23 are provided with a cutting tool for drilling the oil hole. (Drill) Guide bush 24 that guides 12, 13,
25 is fixed.

In FIG. 1, reference numeral 26 denotes a clamping device that serves both to phase the crankshaft 2 in the rotational direction and to clamp it.
(see Fig. 4), the clamp arm 27
is arranged diagonally from the side of the jig main body 3 corresponding to the one oil hole machining unit 4 toward one end of the crankshaft 2, and the clamp arm 2
7 is pivotally connected to the upper end of a column 30 which is fixed upright on a mounting plate 29 which is fixedly protruding from the side of the jig main body 3 so as to be rotatable in the vertical direction by a shaft 31. As shown in FIGS. 2 and 4, its one end is bifurcated, and its tip is shaped like a disc, and this disc head 27a is
Guide member 32 mounted perpendicularly to the mounting plate 29
The upper end groove 33a of the rod 33 is fitted into the rod 33 so as to be vertically slidable. In addition, the above rod 3
The lower end of 3 is connected to the piston rod 28a of the cylinder 28 which is integrally assembled to the guide member 32, and by moving the cylinder 28 back and forth, the clamp arm 27 can be operated into the clamped and unclamped states. .

Further, a swinging member 34 is pivotally attached to the other (crankshaft 2 side) end surface of the clamp arm 27 so as to be rotatable by a shaft 35, as shown in FIGS. 3 to 5. A journal portion 2a of the crankshaft 2 is provided on the lower surface of both ends of the swinging member 34.
and a clamp presser 36 that engages with the pin portion 2b.
and a phasing pusher 37 are respectively protrudingly provided,
Further, above the swinging member 34, a mounting member 38 that covers the swinging member 34 is fixed to the other end of the clamp arm 27 with bolts or the like. A pin 39 is mounted so as to be movable up and down at a position facing the pin 39, and this pin 39 is always urged downward by a compression coil spring 40 and is pressed into engagement with the upper surface of the swinging member 34 on the side of the phasing pusher 37. At the same time, the mounting member 3
A stopper bolt 41 is screwed onto the clamp presser 36 side of No. 8, and the swinging member 3 is rotated by the press pin 39 by the stopper bolt 41.
4 in the counterclockwise direction (in FIG. 5). Also, the journal portion 2b with which the phase determining pusher 37 engages
A phase determining member 42 that engages with a reference surface 2c formed on the crankshaft 2 as shown in FIGS. 2 and 3 is fixed to the support portion 18 corresponding to the phasing member 42.

Further, in FIG. 1, reference numeral 43 denotes a clamping device for clamping the other end side journal portion 2a of the crankshaft 2, and the clamping device 43 is rotatably supported on the jig body 3 via a support 44. A clamp arm 45 is provided, and the clamp arm 45 is adapted to be clamped and unclamped by a hydraulic cylinder (not shown). Further, 46 is a pressing member that positions the crankshaft 2 in the axial direction, and 47 is a chip receiver.

Next, the operation of the device of the present invention configured as described above will be explained.

When drilling an oil hole in the journal portion 2a of the crankshaft 2, the crankshaft 2 is moved to the support portions 18, 1 of the jig main body 3 by a conveying means (not shown).
9 and each journal part 2a receiving member 2
0,21. Next, the pressing member 46 is operated to position the crankshaft 2 in the axial direction, and then the cylinder 28 is moved upward to operate the clamp device 26.

That is, when the cylinder 28 is moved upward, the rod 33 is moved upward in the direction of arrow A in FIG.
Accordingly, the clamp arm 27 is rotated about the shaft 31 in the direction of arrow B in FIG. 4. As a result, the respective pressers 36 and 37 provided on the swinging member 34 engage with the journal portion 2a and pin portion 2b of the crankshaft 2 to determine the phase and clamp the crankshaft 2. 37
When the pivot member 34 is not engaged with the journal portion 2a and the pin portion 2b, the swinging member 34 is engaged with the pin 39 and the spring 40.
Therefore, when the clamp arm 27 is rotated in the direction of the arrow B, the phasing pusher 37 is first pressed against the pin portion 2b. When the clamp arm 27 is engaged and further rotated in the direction of arrow B, the entire crankshaft 2 is rotated in the direction of arrow C in FIG. The reference surface 2c located eccentrically from the rotational axis of the crankshaft 2 abuts against the phase determining member 42, thereby determining the phase of the crankshaft 2 in the rotational direction.
After this phasing is completed, the clamp arm 27
When is further rotated in the direction of arrow B, the pin 39 rises against the spring 40, and at the same time, the swinging member 34 rotates clockwise around the shaft 35 to move along the solid line in FIG. The state shown in is reached, and the clamp presser 36 is brought into contact with the journal part 2a.
The journal portion 2a is pressed against the receiving members 20 and 21 and clamped. At the same time, the clamp arm 45 of the clamp device 43 also operates to clamp the journal portion 2a on the other end side of the crankshaft 2.

When the phasing and clamping for the crankshaft 2 is completed, the spindles 10 and 11 of the processing units 4 and 5 on the left and right sides of the crankshaft 2
are rotationally driven by motors 14 and 15, and forward and backward motors 16 and 17 are activated to advance spindle heads 8 and 9 in the crankshaft 2 direction at a predetermined feed speed. The cutting tools (drills) 12 and 13 that rotate along with this are guided by a guide bush 24,
25 and drills an oil hole in the same diameter direction from both sides of the journal portion 2a. When the feed amount of each spindle head 8, 9 reaches a feed amount that is slightly smaller than the radius of the journal portion 2a, a backward command is given to the forward/backward motor 16 of one processing unit 4, and this causes the spindle head to move forward and backward. Head 8 is retracted. Further, the other spindle head 9 moves forward as it is to continue drilling the oil hole in the journal part 2a, and by processing the remaining part with the cutter 13, it communicates with the oil hole machined with the cutter 12, and the remaining part is machined with the cutter 13. An oil hole is formed therethrough in the diametrical direction. When the spindle head 9 reaches the forward end, a backward command is given to the forward/backward motor 17, thereby causing the spindle head 9 to move backward to the backward end.

When the oil hole machining for the crankshaft 2 is completed as described above, the cylinder 28 moves downward and rotates the crank arm 27 in the direction opposite to arrow B in FIG. At the same time, the clamp device 43 is also unclamped to unclamp the crankshaft 2. Further, the unclamped processed crankshaft 2 is carried out by the conveying means, and the unprocessed crankshaft 2 is newly carried onto the support parts 18 and 19.

In the above embodiment, the crankshaft phasing and clamping are performed using a single clamp arm 27.
Although the case has been described in which the phase determining device is used, the device for determining the phase may have a separate structure from the clamp device. In this case, it goes without saying that the phasing device and the clamping device are arranged at positions where they do not interfere with the left and right oil hole machining units 4 and 5.

As described above, according to the present invention, the pair of oil hole machining units are installed symmetrically between the jig main body that supports the crankshaft and can move forward and backward with respect to the crankshaft. The oil hole for the crankshaft can be machined from both sides at the same time, and as a result, the time for drilling the oil hole for the crankshaft can be cut in half compared to the conventional method, and the depth of the hole to be machined using the cutting tool is also reduced by almost half. This improves the removal of chips from the machined hole, making it possible to increase the machining speed.

In addition, the crankshaft phasing clamp device is disposed on the bed outside the operating area of the oil hole machining unit, and the phasing clamp is
One movement of one clamp arm is performed from above by a phasing pusher that presses into engagement with the pin part and a clamp pusher that presses into engagement with the journal part, and the clamp arm is moved diagonally to the direction of movement of the processing unit. Because it is located at .

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an example of a crankshaft oil hole machining device according to the present invention, Fig. 2 is an enlarged plan view of the phasing and clamping portion in Fig. 1, and Fig. 3 is a - line in Fig. 2. FIG. 4 is a sectional view taken along line - in FIG. 2, and FIG. 5 is a sectional view taken along line - in FIG. 2. 1...Bed, 2...Crankshaft, 2a
... Journal part, 2b ... Pin part, 2c ... Reference surface, 3 ... Jig body, 4, 5 ... Oil hole machining unit, 8, 9 ... Spindle head, 10, 11
... Spindle, 12, 13 ... Cutting tool, 18, 1
9...Supporting member, 20, 21...Receiving member, 26
... Clamp device, 27 ... Clamp arm, 2
8... Cylinder, 34... Swinging member, 36... Clamp presser, 37... Phase determining presser, 3
8... Mounting member, 39... Pin, 42... Phase determining member, 43... Clamping device, 46... Pressing member for axial positioning.

Claims (1)

[Scope of utility model registration request] A jig body that is installed on the bed and supports the crankshaft from below, and a journal part that is installed symmetrically with the jig body in between and movable forward and backward with respect to the crankshaft, and that is clamped at least on the crankshaft. a pair of oil hole machining units for machining oil holes from both sides; and a phasing clamp device disposed on the bed outside the operating area of the oil hole machining unit; It has a clamp arm disposed diagonally with respect to the forward and backward direction of the processing unit, a driving means for vertically rotating the clamp arm, and a swinging member attached to the end of the clamp arm facing the crankshaft. The movable member is provided with a clamping pusher that presses and engages with the journal portion of the crankshaft from above, and a phase determining pusher that presses and engages with the pin portion of the crankshaft from above. An oil hole machining device for a crankshaft, characterized in that a spring member is added that urges the determining presser to engage the pin portion before the clamping presser.