JP2002187051A - Deburring device for connecting rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To further improve a deburring capacity by effectively removing burrs and to reduce costs by extending a durable life. SOLUTION: A set of rotary brush members 26a, 26b are arranged adjacent to both sides of a carrier 9, wherein the members have a width corresponding to a thickness of a connecting rod 1 at one end of a metal rod 28 and wherein a brush 30 of a near cylindrical shape is provided with metal fine wires arranged parabolically from an axial center of the rod 28. Burrs generated at a small end 2 are removed by causing the set of rotary brush members 26a, 26b to turn in arrow marked directions B and C under driving operation by rotary driving sources 24a and 24b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting rod capable of suitably removing a whisker-like burr generated at a small end portion when a connecting rod, which is an engine part for a vehicle, is subjected to finish side grinding. The present invention relates to a rod deburring device.

[0002]

2. Description of the Related Art Conventionally, connecting rods have been generally used as parts of a vehicle engine. As shown in FIG. 5, the connecting rod 1 has a small end 2 connected to a piston pin (not shown), a large end 3 connected to a crank pin (not shown), and one end side. And a rod portion 4 for integrally connecting the small end portion 2 and the large end portion 3 on the other end side. The large end 3 is divided into a semi-annular portion 5 on the rod portion 4 side and a semi-annular cap portion 6, and the semi-annular portion 5 on the rod portion 4 side and the semi-annular cap portion 6 are abutted to form a set. Are integrally connected via the bolt 7 of the slab.

The connecting rod 1 is, for example,
The semi-annular cap portion 6 and the other portions are formed separately by casting, and the mating surface of the semi-annular portion 5 and the cap portion 6 on the rod portion 4 side is processed into a flat surface and attached with bolts 7. After the circular portion is subjected to perfect circular processing and the large end portion 3 and the small end portion 2 are subjected to chamfering, the finished side surface of the side surface of the connecting rod 1 is formed. Grinding is performed.

In the finishing side surface grinding, as shown in FIGS. 6 and 7, a pair of disk-shaped grinding wheels 8a and 8b arranged substantially in parallel at a predetermined interval and a pair of the disk-shaped grinding wheels 8a , 8b and a carrier 9 rotatably supported. The carrier 9 is formed of a large-diameter ring body having a specified width that is equal to the thickness of the connecting rod 1 serving as a work, and a plurality of connecting rods 1 are fitted on a side surface of the carrier 9 along a circumferential direction. Is formed.

In this case, a plurality of connecting rods 1 rotate the carriers 9 set in the respective spaces under the driving action of a motor (not shown), and the thickness of the side surfaces of the connecting rods 1 protruding from the specified width of the carriers 9. Only the portion is ground by a pair of disc-shaped grinding wheels 8a and 8b, and the side is finished.

By the way, when the finishing side surface grinding is performed by the disk-shaped grinding wheels 8a and 8b, a burr 1 is formed on the small end portion 2 side.
0 may occur (see FIG. 8). It mainly occurs on the small end portion 2 side, but this is considered to be caused by the processing steps, conditions, etc. before the finish side surface grinding. This burr 10 has a length of about 6 to 7 mm and a diameter of about 10 mm, for example.
It has a beard shape around μ.

Therefore, conventionally, as shown in FIGS. 9 and 10, a burr 1 generated on the small end portion 2 by using a set of metal brushes 11 fixed to a fixing member (not shown).
0 had been removed. This set of metal brushes 11 is fixed to the rotation end of the connecting rod 1 set in the space of the carrier 9 at a position corresponding to the rotation of the small end 2 at a predetermined interval, and is configured in a cassette type so that it can be attached or detached freely. ing.

[0008]

However, in the method of removing burrs generated on the small end of the connecting rod by a fixed set of metal brushes, the tip of the metal brush contacting the small end is not disclosed. However, there is a problem that the deburring ability is deteriorated due to wear and the durability of the metal brush is poor. As a result, the metal brush must be replaced in a short cycle, which increases the cost, and removes the whisker-like burrs that are clogged inside the metal brush, causing uneven wear of the metal brush. There is a problem.

In addition, the replacement operation for replacing with a new metal brush requires a lot of time and is complicated, and the production operation must be stopped in order to perform the replacement operation, resulting in a reduction in production efficiency. There is.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and it is an object of the present invention to further improve the deburring ability by efficiently removing burrs, and to reduce the cost by extending the durable life. It is an object of the present invention to provide a deburring device for a connecting rod that can perform the deburring.

[0011]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a finish side grinding for a cast iron connecting rod having a small end, a rod and a large end integrally joined. In the apparatus for removing burrs generated in the connecting rod when the processing is performed, a space portion in which the connecting rod is set is formed,
A conveying unit rotatably provided in a predetermined direction; a set of grinding units disposed close to both sides of the conveying unit for grinding a side portion of a connecting rod protruding from a specified width of the conveying unit; The metal rod portion has a width corresponding to the thickness of the connecting rod at one end of the metal rod portion, and thin metal wires are radially arranged from the axis of the metal rod portion. A set of rotating brush members provided with a cylindrical brush portion, and a rod portion of the rotating brush member, which rotates the set of rotating brush members in a predetermined direction about the rod portion as a center of rotation; And a rotary drive source.

[0012] In this case, the transporting means comprises a carrier formed on a ring body, and a direction of a rotation axis of the carrier for transporting a connecting rod and a direction of a rotation axis of a set of rotating brush members are substantially orthogonal to each other. By setting to, the contact resistance of the rotating brush member to the side surface of the connecting rod is increased, and burrs are suitably removed.

The rotational speed of the rotary drive source is about 20.
It may be set to be 0 (rpm) or more and 300 (rpm) or less.

Further, the thin metal wire constituting the brush portion is made of a SUS material and has a diameter of about 0.1 mm.
It may be set to 0.3 mm.

According to the present invention, a set of rotating brush members is rotated in a predetermined direction under the driving action of the rotary driving source, and burrs of the connecting rod carried by the carrying means are suitably removed by the rotating brush members. Is done.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a deburring device for a connecting rod according to the present invention will be described below in detail with reference to the accompanying drawings. The same components as those shown in FIGS. 5 to 7 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 1, reference numeral 20 indicates a deburring device for a connecting rod according to an embodiment of the present invention.

The connecting rod deburring apparatus 20 includes a pair of rotary driving sources 24a and 24b fixed on a support base 22 and the like, and the rotary driving sources 24a and 24b via a coupling member (not shown). And a pair of rotating brush members 26a and 26b which are coaxially connected to the drive shaft and rotate in a predetermined direction.

The set of rotating brush members 26a, 26b
Are made of the same components, and are fixedly provided on both sides of a carrier 9 on which a plurality of connecting rods 1 are set. The rotating brush members 26a, 26b
Are rotational drive sources 24a, 24b as shown in FIG.
Rod portion 28 coaxially connected to the drive shaft of
And a rod having a width corresponding to the width of the connecting rod 1 at one end of the rod portion 28 and having a predetermined length of thin wire made of a SUS material radially projecting radially outward from the axis of the rod portion 28. A brush portion 30 having a substantially cylindrical shape as a whole including a hair tip.

The deburring apparatus 20 for a connecting rod according to the embodiment of the present invention is basically configured as described above. Next, the operation and effect of the apparatus will be described.

The connecting rod 1 has, for example, a semi-annular cap portion 6 and other portions formed separately by casting, and the mating surface of the semi-annular portion 5 and the cap portion 6 on the rod portion 4 side is formed. Bolt 7 processed into a flat surface
Shall be attached by The large end where the semi-annular part 5 and the cap part 6 are integrally joined is subjected to round processing, and the large end 3 and the small end 2 are chamfered. After that, the side surface of the connecting rod 1 is subjected to finish side surface grinding.

A plurality of connecting rods 1 are respectively fitted along the circumferential direction in the space of the carrier 9 formed of a large-diameter ring having a specified width which is the thickness of the connecting rod 1 as a work. Shall be

Therefore, as shown in FIG. 1, the carrier 9 is rotated in the direction of arrow A along a pair of disk-shaped grinding wheels 8a and 8b which are arranged substantially in parallel at a predetermined interval. Is ground by a pair of disk-shaped grinding wheels 8a and 8b provided on both sides by the thickness of the side surface of the connecting rod 1 which protrudes from the side surface (specified width).

In this case, the carrier 9 is rotated in the direction of arrow A under the driving action of a motor (not shown), and a control signal from a control circuit (not shown)
4b, the rotation driving sources 24a and 24b are provided to be automatically biased in conjunction with the rotation of the carrier 9.

A pair of rotating brush members 26a and 26b respectively rotate via rod portions 28 connected to the drive shafts of the rotary driving sources 24a and 24b, and the brush portion 30 made of a thin metal wire is used as a carrier 9 for the carrier 9. The burrs and the like are removed by contacting the side surface of the connecting rod 1 set in the space portion (see FIGS. 2 and 3).

At this time, as shown in FIG. 1, the rotation axis directions of the pair of rotary brush members 26a and 26b are substantially orthogonal to the rotation axis direction of the carrier 9 that transports the connecting rod 1. Direction by rotating the pair of rotating brush members 26a and 26b in the counterclockwise direction (arrow B direction) and the clockwise direction (arrow C direction). The contact resistance of the brush members 26a, 26b to the connecting rod 1 increases, and burrs are suitably removed.

In this case, the rotating brush members 26a, 26b
The brush portion 30 having the metal thin wire radially protruded is rotated so that the removed burrs are not clogged in the brush portion 30 under the action of centrifugal force and vibration accompanying the rotation action. Since the burrs can be suitably removed, uneven wear of the brush portion 30 can be suppressed.

Therefore, in the present embodiment, the burrs generated on the connecting rod 1, particularly the burrs generated on the small end portion 2, are efficiently removed, thereby further improving the deburring ability. Manufacturing costs can be reduced by extending the durable life of 26a, 26b.

The rotating brush members 26a, 26b
Is the rod 2 from the drive shafts of the rotary drive sources 24a and 24b.
8 can be easily replaced by easily attaching / detaching, and replacement work and maintenance work of new rotary brush members 26a and 26b can be easily performed.

Further, as compared with the fixed metal brush 11 used in the prior art, the rotating brush member 26
The uneven wear of the brush portions 30a and 26b is reduced, and the durability thereof can be increased by about 2 to 3 times. As a result, it is possible to maintain a stable deburring ability for a long time.

Next, the number of rotations of the rotating brush members 26a and 26b which rotate under the driving action of the rotary driving sources 24a and 24b is 2 as will be understood from the experimental results of FIG.
A range of from 00 (rpm) to 300 (rpm) is preferable. If the rotation speed of the rotating brush members 26a and 26b exceeds 300 (rpm), uneven wear of the brush portion 30 occurs.

In the above experiment, the brush unit 30 was used
US material having a diameter of about 0.1 mm to 0.3 mm was used.

[0033]

According to the present invention, the following effects can be obtained.

That is, the rotation axis directions of a pair of rotating brush members are set to directions substantially orthogonal to each other with respect to the rotation axis direction of the transport means for transporting the connecting rod. By setting the rotation directions of the rotating brush members in the clockwise direction and the counterclockwise direction, respectively, the contact resistance of the rotating brush member to the connecting rod is increased, and burrs are suitably removed.

Therefore, the burrs generated on the connecting rod, particularly the burrs generated on the small end portion, are efficiently removed to further improve the deburring ability and extend the durability life of the rotary brush member. Cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic configuration perspective view of a deburring device for a connecting rod according to an embodiment of the present invention.

FIG. 2 is a partially omitted side view of the connecting rod deburring device.

FIG. 3 is a side view showing an engagement state between a pair of rotating brush members provided on the deburring device for a connecting rod and a connecting rod.

FIG. 4 is an explanatory view showing an experimental result of the number of rotations of a rotary drive source provided in the deburring device for a connecting rod.

FIG. 5 is an exploded side view of the connecting rod.

FIG. 6 is a side view showing a state in which a connecting rod is finish-ground in a conventional technique.

FIG. 7 is a plan view of FIG. 6 as viewed from above.

FIG. 8 is a partially omitted side view showing burrs generated at a small end of the connecting rod.

FIG. 9 is a side view showing a state in which a metal brush is provided for removing burrs shown in FIG. 8 in the related art.

FIG. 10 is a side view showing an engagement state between a metal brush and a connecting rod used in the prior art.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Connecting rod 2 ... Small end 3 ... Large end 8a, 8b ... Disc-shaped grindstone 9 ... Carrier 10 ... Burr 20 ... Connecting rod deburring device 24a, 24b ... Rotation drive source 26a, 26b
... Rotating brush member 28 ... Rod part 30 ... Brush part

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[Procedure amendment]

[Submission date] January 16, 2001 (2001.1.1)
6)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Figure 2

[Correction method] Change

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FIG. 2

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Fig. 6

[Correction method] Change

[Correction contents]

FIG. 6

[Procedure amendment 3]

[Document name to be amended] Drawing

[Correction target item name] Fig. 8

[Correction method] Change

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FIG. 8

[Procedure amendment 4]

[Document name to be amended] Drawing

[Correction target item name] Fig. 9

[Correction method] Change

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FIG. 9

Claims (4)

[Claims] An object of the present invention is to remove burrs generated on a connecting rod made of cast iron having a small end portion, a rod portion and a large end portion which are integrally connected to each other when a finishing side surface grinding process is performed on the connecting rod. A space in which a connecting rod is set, formed with a conveying means rotatably provided in a predetermined direction, and a connecting means disposed close to both sides of the conveying means and protruding from a specified width of the conveying means. A set of grinding means for grinding a side portion of the rod; and a metal rod portion having a width corresponding to the thickness of the connecting rod at one end of a metal rod portion which is disposed close to both sides of the transport means. A set of rotating brush members provided with a brush portion having a substantially columnar shape in which thin metal wires are radially arranged from the axis of the portion; A rotary drive source connected to the pad portion for rotating the pair of rotary brush members in a predetermined direction about the rod portion as a center of rotation. 2. The apparatus according to claim 1, wherein said conveying means comprises a carrier formed on a ring body, and a direction of a rotation axis of said carrier for conveying a connecting rod, and a rotation axis of a set of rotating brush members. A deburring device for a connecting rod, wherein the directions are set to directions substantially orthogonal to each other. 3. The apparatus according to claim 1, wherein the number of rotations of the rotary drive source is set to be approximately 200 (rpm) or more and 300 (rpm) or less. Deburring device for connecting rods. 4. The device according to claim 1, wherein the thin metal wire constituting the brush portion is made of a SUS material, and has a diameter of about 0.1 mm to 0.3 mm. A deburring device for a connecting rod, which is set.