JPS6257838A - Positioning mechanism for jig device - Google Patents

Abstract

PURPOSE:To position a workpiece exactly due to non-vibration and prolong the life of a tool by engaging and fixing jig pallets and jig cases and by engaging the workpiece in the state that it can be slidden in one way through a second engaging means. CONSTITUTION:Jig pallets 14a and 14b for holding a workpiece and jig bases 12a and 12b for fitting it are arranged and fixed to each other through a first engaging means. And the workpiece is engaged in the state that it can be slidden in one way through a second engaging means. Then, the workpiece is not vibrated while being cut and also positioned exactly. A tool is, therefore, not damaged during cutting and can perform highly accurate machining. And the pallets 14a and 14b are free from the deformation caused by the heat generated during the cutting, and positioning accuracy can be maintained high for a long time. Highly accurate and economical machining process can, therefore, be carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a positioning mechanism for a jig device, and more particularly, in a positioning mechanism for a jig bullet that holds a workpiece and is attached to a jig base at a predetermined processing position, the present invention relates to a positioning mechanism for a jig device. and the jig pallet, an engaging means for mutually engaging and fixing them, and an engaging means for engaging the jig pallet so as to be slidable in only one direction with respect to the jig base. The present invention relates to a positioning mechanism for a jig device, which enables accurate positioning of a workpiece with respect to a processing tool, suppresses vibration of the workpiece during processing, and reduces occurrence of damage to the processing tool.

For example, in an internal combustion engine, a connecting rod that connects a piston and a crankshaft is composed of a rod body and a cap attached to the large end of the rod body. and,
Connection holes are formed in the large end and both ends of the cap, respectively, for insertion of a tightening bolt that connects them. In addition, since the crankshaft is fitted into the hole defined by the large end of the rod body and the cap via a bearing, the inner periphery of this hole is used to supply lubricating oil to the bearing. An oil hole and a metal groove for fitting the bearing are formed.

In this case, the processing of the coupling hole and the processing of the oil hole and metal groove are performed at different processing positions. Therefore, the jig bullet that holds these rod bodies and caps is generally configured to be movable between predetermined processing positions by a transfer mechanism.

By the way, when the jig pallet that holds the workpiece is configured to be movable between machining positions as described above, the jig pallet needs to be accurately and reliably fixed on the jig base at a predetermined machining position. be. As this fixing method,
For example, there is one in which a pin or the like is implanted in one of a jig pallet or a jig base, and a hole into which the pin or the like is fitted is formed in the other. In this case, the hole is formed to be larger with some allowance so that the pin etc. can be reliably fitted.

However, this allowance in the hole becomes a factor that causes the workpiece to vibrate when rotational motion for cutting the hole is transmitted during machining. Therefore, when the workpiece vibrates, the processing tool that processes the workpiece also vibrates, causing accidents such as chipping of the blade. Furthermore, since the workpiece is not securely fixed, the positioning accuracy of the workpiece relative to the processing tool is also inaccurate.

On the other hand, in order to solve these problems, efforts have been made to reduce the margin of the hole for the pin etc. as much as possible. However, with such a configuration, the jig pallet may expand due to heat generated during machining, making it impossible to fit pins, etc. into the holes, and there is a risk that the jig pallet may not be fixed. In addition, if the jig pallet expands when the pin and hole are fitted, the jig pallet will be deformed due to restraint during positioning, and not only will accurate machining become impossible, but the jig pallet itself will be regenerated. There was an inconvenience that it became unusable.

The present invention has been made in order to overcome the above-mentioned disadvantages, and includes a first engagement mechanism for mutually engaging and fixing a jig pallet that holds a workpiece and a jig base on which this jig pallet is mounted. By connecting the means with the second engaging means that is slidably engaged in only one direction, there is no vibration of the workpiece during machining, and accurate positioning of the workpiece is possible. It is an object of the present invention to provide a positioning mechanism for a jig device, which increases durability and makes it possible to achieve a machining process that is not only highly accurate but also highly economical.

In order to achieve the above object, the present invention provides a positioning mechanism for a jig pallet that holds a workpiece and is attached to a jig base at a predetermined processing position. a first engaging means that engages and fixes a portion of the jig pallet to the jig base by engaging with each other; and a first engaging means that is disposed on the jig base and the jig pallet and engages with each other. Accordingly, the jig pallet is characterized by comprising second engaging means that engages the jig base in a state in which other parts of the jig pallet can be slid in only one direction.

Next, preferred embodiments of the positioning mechanism for a jig device according to the present invention will be described in detail with reference to the accompanying drawings.

1 and 2, reference numeral 10 indicates a main body of a split-type jig device having a positioning mechanism for a jig device according to the present invention. The main body 10 includes a pair of jig pallets 14a and 14b placed oppositely on a jig base 12a or 12b arranged at a predetermined processing position. In this case, one jig barre l-14b is configured to be movable relative to the other jig pallet 14a. Note that stoves and doors 16a to 16f as workpieces are attached to these jig pallets 14a and 14b, and the stoves 16a to 16f, which have completed a predetermined machining process at the processing position shown in FIG. 1, are then transferred to a transfer machine (not shown). It is configured to be transported to the next stage processing position shown in FIG.

Therefore, as shown in FIG. 3, on the jig bases 12a and 12b, cylindrical reference seats 18a to 18c and 19a to 9C are arranged at equal intervals on both sides of the upper surface.
Furthermore, a coupling 20a as a third engagement member and a compulsion ring 22a as a first engagement member are provided at both ends in the longitudinal direction.

Here, as shown in FIGS. 4 and 5, the coupling rings 20a and 22a each have a hollow ring shape, and the upper surface of the coupling 20a has jig bases 12a and 12b
A pair of convex portions 30a and 30b are formed along the longitudinal direction. As shown in FIGS. 6 and 7, these convex portions 30a and 30b have air delivery holes 34a and 34b that communicate with air delivery passages 32a and 32b drilled in the jig bases 12a and 12b. is drilled. Furthermore, three convex portions 38a to 38C are formed on the upper surface of the coupling 22a.

Couplings 2 are attached to these convex portions 38a to 38c.
As in the case of 0a, air delivery holes 42a to 42c are provided to communicate with air supply passages 40a to 40c provided in jig bases 12a and 12b, respectively.

On the other hand, guide rails 24.11 and 24b are provided along both sides of the jig bases 12a and 12b so as to be movable up and down in the direction of the arrow.
Guide rails 26a, 26b are provided at both ends of the 4b for transporting the jigs Baleno l-14a, 14b to each processing position.
are set up consecutively.

As shown in FIGS. 6 and 7, jig barres l-14a and 14b are placed on the jig base 12a or 12b. That is, on the lower surface of the jig pallet 14a, a reference seat 18a is provided on the jig bases 12a and 12b.
Reference seats 28a to 28c are provided opposite to 18C. In addition, couplings 2 disposed on the jig bases 12a and 12b are provided at both ends of the lower surface of the jig baret 14a.
Coupling 20b as a fourth engaging member that engages with 0a and 22a, respectively, and coupling 2 as a second engaging member.
2b is arranged. Here, the couplings 20b, 22
As shown in FIGS. 4 and 5, b has a hollow ring shape, and the lower surface of the coupling 20b is
Concave portions 36a, 36b are formed to engage convex portions 30a, 30b of the pull 20a. Also, coupling 2
Concave portions 44a to 44C are formed on the lower surface of the camp ring 2b to engage with the convex portions 38a to 38c of the camp ring 22a, respectively. In this case, the couplings 20a, 20b are the second
Comprising the engagement means, the compression rings 22a and 22b are the first
This constitutes an engaging means.

On the other hand, on the lower surface of the jig pallet 14b, in the machining state shown in FIG. 1 and the machining state shown in FIG.
Column-shaped reference seats 46a to 46c and 48a to 48C are arranged opposite to 9C, respectively. In this case, the reference seats 18a to 18c, 19 on the jig bases 12a, 12b side
a to 19C, reference seats 28a to 28c, 46a to 46C and 48a to 48C on the jig pallet 14a and 14b side, couplings 2Qa, 20b and 22
It is configured so that when a and 22b are engaged, they face each other with an extremely small distance apart (.

Both ends of jig ballens h14a and 14b are connected to the lower
50a and 50b (see FIG. 2), and a support plate 52 is attached to the side of the jig barens)-14a and 14b.
Rollers 54a to 54 supported via a to 52d
d guide rails 24a, 24b or 26a, 2
It is supported on a groove formed in 6b and extending in the longitudinal direction thereof. One end of the connecting rods 50a, 50b is fitted and fixed to the jig ball J-14b, and the other end is slidably fitted into holes 56a, 56b drilled in the jig pallet 14a. Grooves 58a, 58b are formed at one ends of the connecting rods 5Qa, 50b protruding from the jig pallet 14b, and positioning pins 60a, 60b are attached. A set bar 62, which is rotated by a swing arm (not shown) at each processing position, is provided in the grooves 58a, 58b.
a and 62b are engaged. In addition, positioning pins 60a, 6
0b is configured to fit into positioning posts 64a and 64b, respectively, which are arranged at predetermined positions in the processing position shown in FIG.

Connecting rods 50a, 50 that fit into holes 56a, 56b
As shown in FIG. 8, plate-shaped notches 66a and 66b are formed in the side circumferential portion of b, with both sides vertically cut out, and connecting rods 50 in the notches 66a and 66b are formed.
One side of the notch surfaces of a and 50b is oriented upwardly. In addition, at the other ends of the connection ports 50a and 50b, there are sloped portions 70a and 70b that slope upward as shown in the figure.
is formed. The connecting rods 50a, 50b, on which the sloped portions 70a, 70b are formed, are configured to protrude from the holes 56a, 56b via the bushes 72a, and their ends are connected to a protective cap 74a attached to the jig bullet 14a.
, 74b.

On the other hand, cambling 76a, 76b and 73a, 7
8b is arranged. These couplings 76a, 76
b and t8a, 78b have concave and convex portions that engage with each other on opposing surfaces, and are fixed to the jig pallets 7) 14a, 14b, respectively, while being fitted onto the connecting rods 50a, 50b via bushes 72b, 72C. (See Figure 6).

Also, these couplings 76a1, 76b, 78
A, 78b has a telescopic protective cover 80a on its outer periphery.
80b is covered.

At both ends of the top surface of the jig 14a, there are jig barens).
jig pallet 14a; z) position of 14b and jig pallet 14a, 1 relative to jig bases 12a, 12b;
a locking mechanism operating section 82a for holding the position of 4b;
82b is constructed (see FIG. 6).

These locking mechanism operation parts 82a and 82b are connected to the jig pallet 1.
It includes cylindrical parts 84a, 84b implanted on the cylindrical parts 84a, 84b, and operation rods 86a, 86b fitted to the cylindrical parts 84a, 84b, and a cap 8 is attached to the upper end of the cylindrical parts 84a, 84b.
8a and 88b are fitted and fixed. Operation dedicated 86a, 86b
The upper end portions thereof protrude upward through the caps 88a and 88b, and the lower end portions are formed with wedge portions 90a and 90b.

Then, the caps 88a, 88b and the wedge portions 90a, 90b
Coil springs 92a and 92b are interposed between the two. The wedge portions 90a, 90b have connecting rods 50a, 5 at their lower ends.
Groove portions 94a, 9 that engage with notches 66a, 66b of 0b
4b is drilled, and the connection o is 50a, 50b.
slope portions 96a, 96 slidingly in contact with slope portions 68a, 68b of
b is formed.

The lock mechanism operation parts 82a, 82b include clamper parts 98a, 98b arranged in the processing position shown in FIG. 1 or clamper parts 10 arranged in the processing position shown in FIG.
0a and 100b are fitted. Here, the clamper part 9
8a, 98b, 100a, and 100b constitute pressing means. As shown in FIG. 6, the clamper portions 98a, 98b include clamp arms 1.102a, 102b and cylindrical engagement portions 104a, 104b attached to the tips of the clamp arms 102a, 102b. This engaging portion 1
04a, 104b have pressing rods 1oaa, which are biased to project downward by the elastic force of disc springs 106a, 106b;
108b is installed inside. In this case, the engaging portions 104a, 1
Holes 109a and 109b are provided at the bottom of 04b to loosely fit into the operating rods 86a and 86b of the lock mechanism operating sections 82a and 82b.
are formed, and the lower ends of the pressing rods 108a, 108b protrude into the holes 109a, 109b.

On the other hand, the clamper parts 100a, 100b, as shown in FIG. A rod mechanism operating portion 82a is provided at the bottom of the engaging portions 112a and 112b.
, 82b, the hole 114 loosely fits into the operating rods 86a, 86b.
1.114b is formed.

Workpieces 16a to 16f of the stove are mounted on the jig burr holes 4a and 14b.
"16.11 to 16f connect the piston and crankshaft in an internal combustion engine, and the HINO1 main body 11
6a to 116f and caps 118a to 118r. The rod bodies 116a to 116f have large ends 120a to which camps 118a to 118f are attached.
120 [and a small end 122 connected to the piston side]
a, 71+ to 122f.

Therefore, the rod body 116a is placed on the jig bullet 14a.
Reference seats 124a to 124f that support large ends 120a to 120f of 116r to 116r, and small ends 122a to 1
Support seats 128a to 128f are provided with pins 126a to 126f that fit into the support seats 128a to 128f. Also,
Clamp members 134a to 134c are fixed onto the jig Baleno H4a by bolts 130a to 130c and pins 132a to 132c, and this clamp member 1
Holding members 136a to 136f, which hold the large ends 120a to 12of, are fixed to both ends of 34a to 134c by poles 138a to 138f, respectively.

On the other hand, reference seats 140a to 140f that support the caps 118a to 118f are disposed on the jig baleno 1-14b, and clamp members 146a
146f to 146f are fixed.

The positioning mechanism for a jig device according to the present invention is basically constructed as described above, and its operation and effects will be explained next.

First, at a predetermined position, the stoves 16a to 16
Attachment work of f to the jig barrets 14a and 14b is performed. In this case, the jig pallets 14a and 14b are in the divided state shown in FIG.

Therefore, the large end portion 12 of the loft main body 116a to 116f
0a to 120f are the reference seats 124 of the jig bullet 14a.
a to 124f, and small ends 122a to 122f.
are fitted to the pins 126a to 126f of the jig bullet 14a.

Then, the clamp members 134a to 134c are attached to the bin 13.
2a to 132c and fixed onto the jig bullet 14a by bolts 130a to 130C, the dog parts 120a to 120f are fixed to the reference seats 124a to 1.
24f and the holding members 136a to 136f, and the rod bodies 116a to 116f are attached to the jig bareso H4a.
Fix it on top.

On the other hand, the caps 118a to 118f are attached to the jig pallet 1.
4b, and the clamp members 146a to 146f are placed on the reference seats 140a to 140f of the pins 144a to 14b.
4f and is fixed onto the jig bullet 14b by bolts 142a to L42f'2. As a result, the caps 118a to 118f are sandwiched between the reference seats 140a to 140f and the clamp members 146a to 146f and fixed on the jig bullet 14b.

Next, the jig barn H4b is moved toward the jig barb hole 4a, and the jig pallets 14a and 14b are brought into the mating state shown in FIG. 1. In this case, the jig bareso) 14 b
are guided by the connecting rods F50a and F50b from the state shown in FIG. 7, and are moved by the rotational movement of the seno I bars 62a and 62b under the driving action of a swinging arm (not shown). Here, in the mounting position of the connecting rods 16a to 16f, the clamper parts 98a, 98b, 100 shown in FIG. 6 and FIG.
It is assumed that a and 100b are not installed.

Therefore, the connecting rods 50a and 50b are connected to the jig balent 14.
b, and is pressed by the set bars 62a, 62b, and slides within the holes 56a, 56b of the jig/bullet 14a. Inside the holes 56a and 56b, an operating rod 86a,
Patterned parts 90a and 90b provided at the lower end of 86b protrude, and the patterned parts 90a and 90b connect the connecting rods 50a and 50b.
The slope portions 70a and 70b formed at the tips of the 0b push the coil springs 92a and 92b upward against the elastic force of the coil springs 92a and 92b. When the connecting rods 50a, 50b are inserted into the holes 56a, 56b by a predetermined amount, the structure 90a
, 90b are connected to the connecting loft 5.
It fits into the notches 66a and 66b of 0a and 50b. In this case, the slope portions 96a, 96b of the patterned portions 90a, 90b are in sliding contact with the slope portions 68a, 68b of the connecting rods 5Qa, 50b, and the coupling 76a is disposed facing each other between the jig pallets 14a, 14b. , 76b and 78a, 7
The concave and convex portions of 8b engage with each other. As a result, the mating state of the jig pallets 14a, 14b is maintained. The jig pallets 14a and 14b set in a mating state are transported to the processing position shown in FIG. 1 by a transfer machine (not shown) with rollers 54a to 54d engaged with guide rails 26a and 26b.

In the machining position shown in FIG. 1, machining spindle devices 148a and 148b are arranged on both sides of the jig balents 14a and 14b, and these machining spindle devices 148a and 148b each have six
Tool holders 150a to 150f, 152a to 1
52f and these tool holders 150a to 150f, 1
Tools 154a to 15 attached to 52a to 152f
4f, 156a to 156f, and a stove top 16
The coupling holes are aligned with the joints between the large ends 120a to 12Of and the caps 118a to 118f, which fall in the caps 120a to 16', and are integrally machined.

Here, the machining work of this joint hole includes, for example, counterbore machining with a counterbore cutter, escape hole machining with a stepped drill,
The tools 154a to 154 are used in accordance with each process, including four processes: pilot hole machining with a drill and finishing machining with a reamer.
f, 156a to 156f are exchanged.

When the jig pallets 7t44a, 14b are transported to the predetermined processing position shown in FIG. 1, the guide rails 24a, 24b descend in the six directions of the arrows shown in FIG. At this time, couplings 20b and 2 are attached to both ends of the lower surface of jig ball l-14a.
2b are arranged respectively, and these couplings 2Q
b and 22b engage with couplings 20a and 22a, respectively, disposed on the jig base 12a. Further, reference seats 28a to 28c provided on the lower surface of the jig pallet 14a.
are the reference seats 18a to 1 arranged on the jig base 12a.
The reference seats 46a to 46c, which are close to the jig base 12a and are disposed on the lower surface of the jig pallet 14b, are close to the jig base 12a.
It is close to the reference seats 19a to 19c arranged above.

Next, clamper portions 98a and 98b, which are provided at the processing position shown in FIG. 1, are on standby, facing the locking mechanism operating portions 82a and 82b constructed at both ends of the jig pallet 14a. Clamp arms 102 of clamper parts 98a, 98b
The engaging portion 10 is moved by the movement of a and 102b.
The holes 109a and 109b of 4a and 104b are the operating rods 86
a, 86b, and the engaging portions 104a, 104
Pressing rods 108a and 108b installed in
Press 86b downward.

Therefore, the wedge parts 90a, 90b formed at the lower ends of the operating bars 86a, 86b press the slope parts 68a, 68b of the connected lots 50a, 50b with their slope parts 96a, 96b, and the jig pallet 14b is moved into the jig bar. ) 14 a
Press to join. The state at this time is shown in FIG. As a result, the large ends 120a of the rod bodies 116a to 116f
The couplings 76a, 76b and 78a, 78b engage the couplings 76a, 76b and 78a, 78b to join the keys 118a to 118f to ensure accurate mutual positioning. In addition, the jig pallets 14a and 14b are connected to the connecting rod 5Q by the pressing force of the clamper parts 98a and 913b.
Wedge portion 9 that engages with one notch 55a, 66b of a, 5Qb
The mating state is firmly maintained due to the wedge effect of 0a and 9Qb.

On the other hand, the pressing rod 108 of the clamper parts 98a and 98b
Operation rods 86a, 86b pressed by a, 108b
Below the couplings 20a, 20b and 2
2a and 22b are engaged with each other. In this case, the air delivery holes 34a, 34b, 42a to 42 of the convex portions 30a, 30b, 38a to 38c of the couplings 20a, 22a
From C, the air supply path 32 of the jig bases 12a, 12b
Pressurized air is sent from the couplings 20a, 32b, and 40a to 40c, and removes cutting waste generated during machining from the couplings 20a, 2Qb and between the couplings 20a, 22a, 22b. The engagement accuracy is maintained.

Therefore, the jig base 1 is attached to the couplings 20a and 20b.
Convex portions 3Qa, 30b and concave portions 36a, 36b are formed along the longitudinal direction of 2a, and these engage with each other, so that the jig ball (1) relative to the jig base 12a is
The positions of 4a and 14b are set accurately.

Connecting rods 16a to 1 positioned in this way
．． 6f, a joining hole is drilled using tools 154a to 154f and 156a to 156f in the processing spindle devices 148a and 148b.

Here, since the jig pallets 14a, ], 4b are allowed to move in the longitudinal direction of the jig base 12a by the couplings 20a, 20b, the jig pallets 14a, 4b are allowed to move in the longitudinal direction of the jig base 12a during machining.
Even if the seats 14a, 14b are heated and deformed, there is no risk that the jig pallets 14a, 14b, etc. will be deformed due to thermal expansion.

Further, the couplings 22a and 22b have three convex portions 38.
Since the recesses 44a to 44C engage with each other, the jig pallets 14a and 14b are reliably prevented from moving relative to the jig base 12a, and their positioning is performed accurately. Furthermore, the jig pallets 14a, 14b are clamped by clamping parts 98a, 98b.
a, 22a, and the reference seats 18a to 18
C119a to 19c prevent downward displacement. Therefore, the processing spindle devices 148a, 148b
The tools 154a to 154f, 156a to 156r attached to the connecting rods 16a to 16fi can process the connecting rods 16a to 16fi extremely accurately, and there is no vibration or the like generated in the connecting rods 16a to 16f during machining. 154'', 156a to 156
There is very little risk of an accident causing damage to f.

Jig baren after finishing the connection hole machining work) 14a, 1
After the clamper portions 98a, 98b are unlocked by the locking mechanism operation parts 82a, 82b, the guide rails 24a, 24b are lifted in the direction of arrow A to be detached from the jig base 12a, and then transferred to the transfer mechanism (not shown) again. is conveyed to the processing position shown in FIG. 2 via guide rails 26a and 26b.

In the machining position shown in FIG. 2, the tool holders 158a to 158
Tools 160a to 160r and cutters 162a to 1621 installed on the rod bodies 116a to 116f form metal grooves in which the bearings are fitted in the large ends 120a to 120 of the rod bodies 116a to 116f and the inner circumferential sides of the caps 118a to 118f. At the same time, the large end portions 120a to 1
An oil hole for supplying oil to the bearing is drilled at 20f.

Jig pallets 14a, 1 transported to the processing position shown in FIG.
4b is placed on the jig base 12b by the downward movement of the guide rails 24a, 24b in the direction of arrow A. In this case, the reference seats 28a to 28c arranged on the lower surface of the jig pallet t-14a are close to the reference seats 18a to 18c arranged on the jig base 12a, and the reference seats 28a to 28c arranged on the lower surface of the jig pallet 14b are close to the reference seats 18a to 18c arranged on the jig base 12a. The arranged reference seats 46a to 46C are close to the reference seats 19a to 19c arranged on the jig base 12b.

In addition, the couplings 20a and 20b disposed at both ends of the lower surface of the jig base 14a are the same as the couplings 22a and 22 disposed at both ends of the jig base 12b in the longitudinal direction.
b, respectively. Next, the connecting rods 5Qa, 50
The setters 62a, 62b are engaged with the grooves 58a, 58b of b, and the jig pallet 14b is detached from the jig pallet 14a by the rotation of the setpers 62a, 62b under the driving action of a swing arm (not shown). . In this case, the notches 66a, 66b of the connecting rods 50a, 50b
(the ψ portions 90a and 90b are engaged with the connecting rod 5
The slope portion 9 is formed by the slope portions 68a and 68b of 0a and 50b.
6a, 96b are pushed upward against the elastic force of the coil springs 92a, 92b (, 7 is raised, and the connecting rods 50a, 5
The engagement between 0b and the structural parts 90a and 90b is released.

When the jig pallet 14b is moved by a predetermined amount by the setters 62a and 62b, the reference seats 48a to 48C disposed on the lower surface of the jig pallet 14b approach the reference seats 19a to 19C disposed on the jig base 12b. do. At this time, positioning pins 60a and 60b formed at one end of the connecting rods 50a and 50b are respectively fitted into positioning posts 54a and 64b arranged at the processing position shown in FIG.

Next, the clamper parts 100a and 100b disposed at the processing position in FIG.
The lock mechanism operating section 8 is
2a, 82b. The state at this time is shown in FIG. Edge rods 86a of lock mechanism operation parts 82a and 82b,
The engaging portions 112a and 112b fitted into the caps 86b press the jig pallet 14a downward via the caps 88a and 88b.

On the other hand, couplings 20a, 22a and 20b, 22b disposed on the jig base 12b are engaged with the lower surface of the jig pallet 14a, respectively. The clamp arms 110a and 110b are firmly engaged by pressing downward. The jig pallet 14b also has positioning pins 60a and 60 that fit into positioning posts 64a and 64b.
b allows accurate positioning.

Connecting rods 16a to 1 positioned in this way
6f, oil holes are drilled using tools 160a to 160r and cuckoos 162a to 162! Metal grooves are engraved using a metal groove. Here, the jig bullet 14
Since a and 14b are each held accurately and firmly,
Tools 160a to 160f and cuckoos 162a to 1627! There is no risk of damage caused by vibration during machining, and accurate machining can be performed.

After completing the machining work for the oil holes and metal grooves, the large ends 120a to 120f and the caps 118a to 118
The joint surface with f is cleaned with cutting oil or the like.

Then, these jig pallets 14a and 14b are brought together again as shown in FIG. 1. That is, the jig ballen h
The clamper parts 100a and 100b are removed from the locking mechanism operation parts 82a and 82b of the jig barret 14a.
4b is moved by the rotation of the set bars 62a, 62b. Slope portions 70a, 7 of connecting rods 50a, 50b
0b pushes up the wedge parts 90a and 90b, and the jig pallet 1
4a, 14b are joined, and the wedge portions 90a, 90b engage again with the cutouts 66a, 66b of the connecting rods 5Qa, 50b. When the jig bullets H4a and 14b are joined, the guide rails 24a and 24b rise in the direction of arrow A, and these jig barlets 1 are moved by a transfer machine (not shown).
4a and 14b are conveyed on guide rails 26a and 26b, and the work is completed.

As described above, according to the present invention, the jig pallet that holds the workpiece and the jig base on which the jig pallet is mounted are fixedly engaged with each other by the first engagement means, and the second engagement means By being attached so that it can slide in only one direction, there is no vibration in the workpiece during machining, so there is no damage to the machining tool, and the positioning of the workpiece is accurate, resulting in high precision. Processing becomes possible.

Furthermore, the jig bullet is not deformed by heat during processing, and the positioning accuracy of the jig barren can be maintained for a long period of time.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to these embodiments, and various improvements and changes in design can be made without departing from the gist of the present invention. Of course.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a state in which the main body parts are aligned in the positioning mechanism for a jig device according to the present invention, and FIG. 2 is a plan view showing a divided state of the main body part in the positioning mechanism for a jig device according to the present invention. FIG. 3 is a perspective view of a jig base in the positioning mechanism for a jig device according to the present invention, and FIGS. 4 and 5 are perspective views of the structure of the engaging means in the positioning mechanism for a jig device according to the present invention. Figure 6 is a cross-sectional view of the cotton in Figure 1. Figure 7 is a cross-sectional view of the cotton in Figure 2. Figure 8 is a portion showing the connecting member and wedge member in the positioning mechanism for a jig device according to the present invention. FIG. 10... Main body parts 12a, 12b - Jig bases 14a, 14b... Jig pallets 163-16f... Cooker grate 18a-18c, 19a-19c... Reference seat 20a,
20b, 22a, 22b...Couplings 24a, 2
4b, 26a, 26b-guide rails 28a to 28c,
46a to 46c, 48a to 48c... reference seat 50a,
50b...Connecting rods 60a, 60b...Positioning pins 62a, 62b...Sesoto bar 54a, 64b...Positioning posts 82a, 82b...Lock mechanism operating portions 86a, 8
6 b - Operating rods 90 a, 90 b - Structure parts 93 a, 98 b, 100 a, 100 b - Clamper parts 108 a, 108 b... Pressing L) 7 door 116 a
~116f...Rod body 118a ~118f-Cap 124a~124
f-Reference seats 134a to 134c...clamp member 14
0a to 140f... Reference seats 146a to 146f... Clamp member 36b, i! ! O -〇 WO

Claims (5)

[Claims] (1) In the positioning mechanism of a jig pallet that holds a workpiece and is attached to a jig base at a predetermined processing position,
first engaging means disposed on the jig base and the jig pallet, respectively, and engaging with each other to securely fix a portion of the jig pallet to the jig base; second engaging means disposed on the jig pallet and engaged with the jig base in a state in which other parts of the jig pallet can be slid in only one direction by mutually engaging; A positioning mechanism for a jig device, comprising: (2) In the mechanism set forth in claim 1, the first
The engaging means includes a first engaging member disposed on the jig base and having at least three convex portions, and a first engaging member disposed on the jig pallet that engages with each of the convex portions of the first engaging member. A positioning mechanism for a jig device, comprising a second engaging member having at least three concave portions that fit together. (3) In the mechanism set forth in claim 1, the second
The engaging means includes a third engaging member disposed on the jig base and having a convex portion protruding on the same axis, and a third engaging member disposed on the jig pallet and existing on the same axis. and a fourth engaging member having a concave portion that engages with each of the convex portions. (4) In the mechanism set forth in claim 1, the first
and the second engaging means is a positioning mechanism for a jig device, in which the jig pallet is pressed toward the jig base by a pressing means disposed at a predetermined processing position and is firmly engaged with the jig pallet. (5) In the mechanism set forth in claim 1, the first and second engaging means disposed on the jig base have fluid delivery holes opened in the engaging portions for positioning the jig device. mechanism.