JPH0429953Y2 - - Google Patents

Description

[Detailed description of the invention] A. Purpose of the invention (1) Industrial application field The present invention has a small-diameter shaft support hole at one end and a semicircular shaft support fitting surface at the other end. A split structure in which a connecting member and a cap member having a semicircular shaft fitting surface that cooperates with the shaft fitting surface to form a large diameter shaft hole are connected by a connecting bolt in abutting state. The present invention relates to a processing device for finishing the abutting surfaces of the connecting member and the cap member of a type cooking rod, and the bolt holes for connecting bolts of the connecting member and the cap member.

(2) Prior Art Conventionally, in such split type connecting rods, when finishing the abutting surfaces of the connecting member and the cap member, as well as the connecting bolt holes for connecting the connecting member and the cap member, the connecting member and the cap member are Each component was processed individually.

(3) Problems to be solved by the invention After finishing the abutting surfaces of the connecting member and cap member of the split type cooking rod and the bolt holes for the connecting bolts that connect the connecting member and the cap member, In order to maintain the product accuracy of cooking stoves, connecting members and cap members that should be paired with each other are combined as a pair of members, and during the transportation and storage process, so as not to be confused with connecting members or cap members of other cooking stoves. Strict parts management must always be carried out. Conventionally, when finishing the connecting members and cap members that make up each cooking stove individually, each connecting member and cap member are individually transported to the processing equipment, and after finishing, they are individually processed. Because they are transported out of the equipment, great care must be taken in managing the parts during the transportation and storage process of the connecting and cap members until they are connected to each other and assembled as a conrod. It was necessary. Furthermore, since the connecting member and the cap member were processed separately, there was a need for further improvement in work efficiency.

Therefore, the present applicant positioned and fixedly arranged a plurality of connecting members and cap members in correspondence with each other on a first jig stand and a second jig stand. A machining device has already been proposed in which finishing machining of abutting surfaces and bolt holes is performed by adjusting the interval between tool stands.

According to this processing device, the connecting member and the cap member that are to be paired together are processed simultaneously while maintaining the paired state, so that parts management is easy and reliable, and the processing time is reduced. Work efficiency can be further improved.

However, since the distance between the first and second jig stands is adjusted while the connecting member and cap member are positioned and clamped using the positioning member, the positioning accuracy of the positioning member must be set strictly. There is a risk of misalignment between the members and the cap member, and in order to improve the parallelism of the abutting surfaces between the connecting members and cap members of each set, it is necessary to improve the operating precision of the spacing changing device.

The present invention was devised in view of the above circumstances, and it is possible to easily improve the parallel accuracy of the abutting surfaces, and also to easily arrange the connecting member and the cap member on the same axis and perform finishing processing. An object of the present invention is to provide a processing device for a split type conrod that can perform the following steps.

B. Structure of the invention (1) Means for solving the problem The device of the invention consists of first and second jig stands whose edge portions face each other; the abutment surface faces the second jig stand. A plurality of connecting members arranged in parallel on the first jig stand are fixed on the first jig stand so as to allow movement toward the second jig stand and approximately position them. a first positioning member; a first spring that resiliently biases the connecting member, which is almost positioned by the first positioning member, toward the second jig table; A plurality of cap members arranged in parallel on the second jig stand corresponding to each of the connecting members in a state facing toward the jig stand side are allowed to move toward the first jig stand side, and approximately a second positioning member fixedly installed on a second jig stand for positioning;
a second spring elastically biasing the plurality of cap members substantially positioned by the second positioning member toward the first jig table; a plurality of connecting members on the first jig table; a reference plate movable between an insertion position between the abutting surfaces of the plurality of cap members on the second jig table and a retracted position retracted outward from the insertion position; a drive for driving the reference plate; means and;
A first method for fixing each connecting member with its abutting surface in contact with one side of the reference plate on the first jig table.
The apparatus includes a clamping means; and a second clamping means for fixing each cap member with its abutting surface in contact with the other surface of the reference plate onto a second jig table.

(2) Effect Each pair of connecting member and cap member, which are approximately positioned by the first and second positioning members on the first and second jig stands, is elastically pressed against the reference plate by the first and second springs. In this state, the parallelism of the abutting surfaces can be improved, and the corresponding connecting members and cap members can be arranged on the same axis.
In this state, each connecting member and cap member are clamped by the first and second clamping means, and the abutting surfaces and bolt holes are finished.
Therefore, the connecting member and the cap member are finished processed with improved processing accuracy while maintaining the paired state.

(3) Embodiment An embodiment of the present invention will be explained below with reference to the drawings. First, in FIGS. 6 and 7 showing the configuration of a split type conrod,
is composed of a connecting member 1 and a cap member 2. The connecting member 1 has a small diameter shaft support hole 3 on one end side.
, a semicircular shaft fitting surface 4a on the other end side, and a pair of bolt holes 5a, 5b, and abutment surfaces 7a, 7b are formed on the end surface on the shaft support fitting surface 4a side. Further, the cap member 2 has the shaft support fitting surface 4a.
It has a semicircular shaft support fitting surface 4b that cooperates with the shaft support hole 4 to form a large diameter shaft support hole 4, and a pair of bolt holes 6a, 6b corresponding to the bolt holes 5a, 5b. The abutting surfaces 7a, 7b are provided on the end surface on the abutting surface 4b side.
Abutment surfaces 8a and 8b corresponding to the above are formed.

When assembling this cooking rod C, insert connecting bolts 9, 9 into each bolt hole 5a, 6a; 5b, 6b, respectively, and screw nuts 10, 10 onto the end of each connecting bolt 9, 9. and tighten. As a result, the abutting surfaces 7a, 8a; 7a, 8b are brought into close contact with each other, the connecting member 1 and the cap member 2 are integrated, and the split connecting rod C is assembled.

When such a connecting rod C is applied to an internal combustion engine, a piston pin is fitted into the shaft support hole 3,
A crank pin is fitted into the shaft support hole 4 . Moreover, in the state where the connecting member 1 and the cap member 2 are integrated, each abutting surface 7a, 8b, 8a, 8b
is on the cross section of the connecting rod C that includes the center line of the shaft support hole 4.

The present invention is based on the abutting surfaces 7a, 7b, 8 which are rough-machined in advance in the connecting rod C.
a, 8b and each bolt hole 5a, 5b, 6a, 6b
The present invention relates to a processing device for applying finishing effects to objects, and the configuration of the processing device will be described below.

1 and 2, guide rails 14, 14 are mounted on the bed 11 of the processing device by a feed screw 13 which is rotationally driven by a servo motor 12.
A longitudinal moving platform 1 that is moved in the longitudinal direction along
5 is mounted, and on this front-back moving table 15 is a left-right moving table 18 that is moved left and right along a guide rail 17 by a servo motor 16.
is installed. On this horizontally moving table 18, the rotational driving force of the spindle motor 19 is transmitted via a transmission device 20 and a spindle device 21 to a rotary grindstone 22 disposed on the front side of the processing device, and the rotational driving force of a spindle motor 23 is transmitted to a rotating grindstone 22 disposed on the front side of the processing device. The rotational driving force is transmitted via a transmission device 24 and a spindle device 25 to a hole processing tool 2 such as a reamer that protrudes from the front side of the processing device.
6.

On the bed 11, a jig device 27 for use in machining the connecting member 1 and the cap 2 is disposed on the front side of the back-and-forth moving table 15.

In FIGS. 3 and 4, the jig device 27
has first and second jig stands 29 and 30 fixed on a base 28 with their edge portions facing each other. A reference plate 31 is disposed between the two jig stands 29 and 30 and is movable up and down, and an elevating cylinder 32 as a driving means disposed on the upper part of the base 28 is connected to this reference plate 31. be done.

The lifting cylinder 32 has a vertical axis and is connected to the base 2.
8, a piston 36 that defines a lower head chamber 34 and an upper rod chamber 35 and slides on the cylinder body 33; and a piston 36 that is coaxially and integrally connected to the piston 36. A piston rod 37 is also provided which movably and fluid-tightly penetrates the end wall of the cylinder body 33 on the rod chamber 35 side, and a reference plate 31 is connected to the tip of the piston rod 37. Moreover, the base 28 and the cylinder body 3
Fluid supply passages 38 and 39, which communicate with the head chamber 34 and the rod chamber 35 individually, are bored in the tube 2.

The reference plate 31 is a reference surface 3 on the first jig stand 29 side.
1a and a reference surface 31b parallel to the reference surface 31a and on the side of the second jig stand 30 on both the front and back surfaces, and the elevating cylinder 32 connects the two jig stands 29 and 30. It is driven up and down between an insertion position located between the member 1 and the cap member 2 and a retracted position retracted downward from the insertion position.

On the upper surface of the first jig table 29, a plurality of connecting members 1, 1, for example, a pair of connecting members 1, 1 are mounted on their abutting surfaces 7.
In order to position each connecting member 1, 1 in parallel so that a, 7b faces the second jig table 30 side,
A pair of first
Positioning members 40, 40 and a pair of first positioning members 41, 41 each having a protrusion 41a that fits loosely into the shaft support fitting surface 4a are fixedly provided. With each connecting member 1, 1 placed on the first positioning member 40, 41;
One of the first positioning members 40, 40 has a leaf spring-shaped second member to elastically press the connecting members 1, 1 toward the second jig table 30 side. 1 springs 42, 42 are attached.

On the upper surface of the second jig stand 30, a pair of cap members 2, 2 are connected to the connecting member 1 on the first jig stand 29, and
In order to substantially position the abutting surfaces 8a and 8b in parallel with the abutting surfaces 7a and 7b in correspondence with the abutting surfaces 7a and 7b, a pair of protrusions 43a each having a protrusion 43a that fits loosely into the shaft support fitting surface 4b are provided. Second positioning members 43, 43 are fixedly installed. Such second
Each cap member 2 is placed on the positioning members 43, 43,
Each cap member 2, 2 can be moved toward or away from the connecting member 1, 1 with the cap member 2 placed thereon. Connecting member 1,1 on 29
Second springs 44, 44 in the form of leaf springs are attached to elastically press the springs toward the sides.

The first jig stand 29 is provided with a first clamp means 45 for fixing the connecting members 1, 1 positioned on the first jig stand 29, and the second jig stand 30 is provided with a first clamp means 45 for fixing the connecting members 1, 1 positioned on the first jig stand 29. A second clamp means 46 is provided for fixing the cap members 2, 2 positioned on the two jig stands 30.

The first clamp means 45 includes a support link 48 whose proximal end is pivotally supported via a horizontal pin 49 on a bracket 47 protruding from the first jig table 29, and a pin 50 parallel to the pin 49. a swinging lever 51 whose intermediate portion is connected to the tip of the support link 48;
, a clamp cylinder 52 supported by the first jig stand 29 and connected to the base end of the swing lever 51, and a positioning member 40,
A pressing body 55 is connected to the tip of the swinging lever 51 so as to press it onto the swinging lever 41. The clamp cylinder 52 has a vertical axis and is fixedly supported by the first jig stand 29.
A pin 54 with a horizontal tip of the piston rod 53 of No. 2
It is connected to the base end portion of the swing lever 51 via.
A bracket 55a is integrally provided on the pressing body 55, and the tip of the swing lever 51 is connected to this bracket 55a via a horizontal pin 56.

Each connecting member 1, 1 is connected to the first positioning member 40, 4
1; When positioning and fixing on 40, 41,
The clamp cylinder 52 is contracted and the swing lever 51 is rotated so that its tip is in the upper position, and the pressing body 55 is retracted to the upper position. Activate extension. As a result, the swinging lever 51 rotates so that its tip is in the downward position, and the pressing body 55
connects each connecting member 1, 1 to the first positioning member 40, 4
1; Press onto 40 and 41 from above.

The second clamping means 46 includes a pair of clamp cylinders 57, 57 supported by the second jig stand 30 corresponding to each of the second positioning members 43, 43, and a pair of clamp cylinders 57, 57 protruding from each of the clamp cylinders 57, 57, respectively. A pin 59 with a horizontal proximal end is attached to the brackets 58, 58.
a pair of support links 60 each pivoted at
A pair of swing levers 62 are provided, each of which has an intermediate portion connected to the distal end portion of the support link 60 via a horizontal pin 61, and a base end portion connected to each clamp cylinder 57, respectively. Each clamp cylinder 57, 57 has a vertical axis and a second
The piston rods 63, 63 in the clamp cylinders 57, 57 have horizontal pins 64, 64, which are fixedly supported on the jig stand 30.
It is connected to the base end portions of the swing levers 62, 62 via. Further, a cap member 2, 2 is attached to a second positioning member 4 at the tip of each swing lever 62, 62.
Pressing members 65, 56 for pressing onto 3, 43
is provided.

Each cap member 2, 2 is connected to the second positioning member 4.
3, 43, the clamp cylinders 57, 57 are contracted and the swing levers 62, 62 are rotated so that the pressing parts 65, 65 at their tips are in the upper position, and the positioning is fixed. When this happens, the clamp cylinders 57, 57 are operated to extend. As a result, the swinging levers 62, 62 are opened so that their tips are in the downward position, and the pressing portion 6
5 and 65 press the cap members 2 and 2 onto the second positioning members 43 and 43 from above.

Next, the operation of this embodiment will be explained. Two pairs of connecting members 1, 1 and cap members 2, 2, each having undergone rough machining, are transported to a finishing machine while maintaining their pair status. Ru. At this time, in the finishing device, the reference plate 31 has been raised to the insertion position by the lifting cylinder 32, and each clamping means 45, 46 has the pressing body 5
5 and the pressing portions 65, 65 are retracted to the retracted position.

In this state, the connecting members 1, 1 are placed on the first positioning members 40, 41; 40, 41, and the cap members 2, 2 are placed on the second positioning members 43, 4.
3 Place it on top. Then, the first springs 42, 4
2, the connecting members 1, 1 have their abutting surfaces 7
a, 7b; 7a, 7b is the reference surface 31 of the reference plate 31
The cap members 2, 2 are pressed so that their abutting surfaces 8a, 8b are brought into close contact with the reference plate 3.
It is pressed so that it comes into close contact with the reference surface 31a of No. 1. That is, the connecting members 1, 1 and the cap members 2, 2 are connected to the first positioning members 40, 41;
41 and the second positioning members 43, 43, and are pressed against the reference plate 31, and since both reference surfaces 31a, 31b of the reference plate 31 are parallel, the connecting members 1, 1 and the cap member 2 , 2 are positioned on the same axis.

Therefore, the clamp cylinders 52, 57 of both clamp means 45, 46 are operated to extend, and the connecting members 1, 1 are moved to the first positioning members 40, 41;
At the same time, the cap members 2, 2 are positioned and fixed on the second positioning members 43, 43. In this state, the abutting surfaces 7a, 7b of the connecting members 1, 1; 7a, 7b; the abutting surfaces 8a, 8b of the corresponding cap members 2, 2;
8a, 8b are opposed to each other with the reference plate 31 interposed therebetween, and since the reference surfaces 31a, 31b of the reference plate 31 are parallel, each abutting surface 7a, 7b;
The parallel accuracy of a and 8b is excellent.

Next, the bolt holes 5a, 6a; 5b, 6b are finished by the hole processing tool 26 while moving the longitudinally movable table 15 and the horizontally movable table 18.

After that, the reference plate 31 is lowered to the retracted position,
The back-and-forth moving table 15 and the left-right moving table 18 are moved to position the rotary grindstone 22 between the connecting members 1, 1 and the cap members 2, 2, and finishing of the abutting surfaces 7a, 7b; 8a, 8b is performed. .

At this time, as shown in FIG. 5, the width A of the rotating grindstone 22 is smaller than the thickness of the reference plate 31, that is, the distance B between the connecting member 1 and the cap member 2 (A<
B) The abutment surfaces 7a and 7b are first finished with the machining allowance C on one surface 22a of the rotary whetstone 22, and then the abutment surfaces 8a and 8b are finished with the machining allowance C on the other surface 22b of the rotary whetstone 22. The finishing process is carried out using the rotary grindstone 22, and the movement of the rotary grindstone 22 is numerically controlled.

In this way, the abutting surfaces 7a, 7b; 8a,
8b is finished on one side at a time with the rotary whetstone 22, even if the width A of the rotary whetstone 22 decreases, there is no need to adjust the interval between the connecting member 1 and the cap member 2, and such This eliminates the need for a mechanism for precise adjustment, which contributes to the simplification of the mechanism.

Both connecting members 1, 1 and both cap members 2, 2
When the finishing process is completed, both clamping means 4
5, 46 is released, and both connecting members 1, 1 and cap members 2, 2 are taken out from the finishing equipment and carried out. Moreover, even in this case, the connecting member 1 and the cap member 2 are carried out and conveyed while always maintaining the paired state.

C. Effects of the invention As described above, according to the invention, the connecting member and the cap member, which are to be paired with each other, are not separated individually, but are finished by the finishing machine while always maintaining the paired state. Therefore, during the series of steps of carrying the parts into the processing equipment, positioning them with respect to the processing equipment, and taking them out from the processing equipment, the connecting members or cap members are not confused with other sets of connecting members or cap members, and the parts are There is no need for special parts management to prevent mix-up, and work efficiency is further improved.

In addition, since the connecting member and cap member are elastically pressed against the reference plate located at the insertion position between them, it is possible to easily improve the parallel accuracy of the abutting surfaces. It becomes easy to position and fix on the axis and perform finishing machining.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and Fig. 1 is an overall plan view of the finishing equipment, Fig. 2 is a view taken in the direction of the arrows in Fig. 1, and Fig. 3 is an enlarged longitudinal cross-section of the main part of Fig. 2. A side view, Figure 4 is a plan view of Figure 3, Figure 5 is an explanatory diagram to explain processing using a rotary grindstone, Figure 6 is a plan view of the divided conrod in a divided state, and Figure 7 is a diagram of the same as in Figure 3. FIG. 6 is a sectional view taken along the - line in FIG. 6; 1...Connection member, 2...Cap member, 3, 4
... Pivot hole, 4a, 4b... Pivot fitting surface, 5a,
5b, 6a, 6b...Bolt hole, 7a, 7b, 8
a, 8b...butt surface, 9...connection bolt,
29...first jig stand, 30...second jig stand,
31... Reference plate, 32... Lifting cylinder as driving means, 40, 41... First positioning member, 4
3... Second positioning member, 42... First spring, 4
4...Second spring, 45...First clamping means, 4
6...Second clamping means, C...Divided connecting rod.

Claims (1)

[Scope of utility model registration request] A connecting member having a small-diameter shaft support hole at one end and a semicircular shaft support fitting surface at the other end, and forming a large diameter shaft support hole in cooperation with the shaft support fitting surface. and a cap member having a semicircular shaft support fitting surface, which are connected by a connecting bolt in a butting state. In a processing device for finish machining a bolt hole, first and second jig stands whose edge portions face each other; the first jig with its abutting surface facing toward the second jig stand; A first positioning member fixedly installed on the first jig table to substantially position the plurality of connecting members arranged in parallel on the table while allowing movement toward the second jig table side; ;
a first spring that elastically biases the connecting member, which is almost positioned by the first positioning member, toward the second jig table side; A second jig is used to approximately position a plurality of cap members arranged in parallel on the second jig stand corresponding to each of the connecting members by allowing movement toward the first jig stand. a second positioning member fixedly installed on the table; a second spring elastically biasing the plurality of cap members substantially positioned by the second positioning member toward the first jig table; Movement between the insertion position between the abutting surfaces of the plurality of connecting members on the first jig table and the plurality of cap members on the second jig table, and the retracted position where they are retracted outward from the insertion position. a possible reference plate; a driving means for driving the reference plate; and a first clamp means for fixing each connecting member with its abutting surface in contact with one side of the reference plate on a first jig stand. a second clamping means for fixing each cap member on a second jig table with the abutting surface in contact with the other surface of the reference plate; and; a split type connecting rod processing apparatus. .