JPH07237016A - Jig bush - Google Patents

Abstract

PURPOSE:To enable the removal of chip in a machined hole at the time of boring by forming one jet hole or more opened outward while communicating the cylindrical inner surface, and a fluid feeding hole part communicated with a hollow part from the flange part outer side face on the flange part end face side. CONSTITUTION:A ring like hollow part 3 is provided in a flange part 2. One jet hole 4 or more opened outward while communicating the cylindrical inner surface 8, and a fluid feeding hole 5 communicated with the hollow part 3 from the flange part outer side face 9 are formed on the flange part end face 10 side. A cutout part 7 for locking a jig bush 1 to a machining jig 12 through a fixing member 13 is provided in a position not interfering with the hollow part 3, fluid feeding hole 5 and jet hole 4 of the flange part 2. The opening part of the jet hole 4 is used as a nozzle to the outside, and washing liquid or the like is discharged from this part to wash the inside of a non-through hole 16, thus removing chip in the hole 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig bush used in a drilling machine.

[0002]

2. Description of the Related Art When performing a boring process, for example, when a non-through hole 16 is to be bored in a work piece 14 as shown in FIG. 4, a working jig 1 for fixing and positioning the work piece 14
2 and the jig bush 20 for positioning the machining tool 17 for drilling is fixed via the fixing member 13 using the notch 21 provided in the jig bush 20. As described above, many fixing means for determining the drilling position of the workpiece have been used.

[0003]

In such a boring process for a non-through hole, a part of the chips generated during the boring process often remains inside the hole of the workpiece due to the depth of the boring hole. The chips left on the work piece impede fixing and positioning of the work piece due to dropping on the processing jig in the next step, and damage to the work piece. Further, the chips remaining inside the hole of the workpiece become an obstacle at the time of machining in the next step, for example, at the time of thread cutting, and cause damage to the thread cutting tool.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to remove the chips inside the hole of the workpiece at the time of drilling without separately using a chip removing device. A jig bush that can be removed is provided.

[0005]

A jig bush of the present invention is a jig bush having a substantially cylindrical shape and a flange portion at one end, wherein a ring-shaped hollow portion is provided inside the flange portion, and the flange bush is provided near the end face of the flange portion. It is characterized in that at least one ejection hole which communicates with the inner surface of the cylindrical shape and opens outward and a fluid supply hole portion which communicates with the hollow portion from the outer surface of the flange portion are formed. Further, it is desirable to have a notch portion for locking the jig bush and the processing jig through a fixing member at a position where they do not interfere with the hollow portion of the flange portion, the fluid supply hole portion and the ejection hole. Furthermore, by having a smooth curved surface or inclined surface at the other end of the cylindrical inner surface, the effect can be further enhanced.

[0006]

According to the above, gas or liquid can be forced to flow in from the fluid supply hole portion and can be ejected to the upper outside of the ejection hole through the ring-shaped hollow portion. It can remove powders. Further, the jig bush and the processing jig can be fixed via the fixing member by using the notch portion formed in the flange portion of the jig bush. Further, since the jig bush of the present invention has a smooth curved surface or inclined surface formed on the other end of the cylindrical inner surface, the machining tool can be easily inserted into the jig bush and the damage of the machining tool can be prevented.

[0007]

Embodiment 1 An embodiment of the present invention will be described below in more detail with reference to the drawings. 1 is a plan view, FIG. 2 is a sectional view, and FIG.
Is a schematic view showing the relationship among the workpiece, the processing jig, and the jig bush, and FIG. 4 is a sectional view of a conventional product.

1 and 2, in a jig bush 1 having a substantially cylindrical shape and having a flange portion 2 at one end, a ring-shaped hollow portion 3 is provided inside the flange portion 2 and a cylinder is provided near the end face 10 of the flange portion. At least one or more ejection holes 4 communicating with the inner surface 8 of the shape and opening outward, and a fluid supply hole 5 communicating with the hollow portion 3 from the outer surface 9 of the flange portion.
And are formed. A structure having a notch portion 7 for locking the jig bush 1 and the processing jig 12 via a fixing member 13 at a position where they do not interfere with the hollow portion 3, the fluid supply hole 5 and the ejection hole 4 of the flange portion 2. It is also possible to have a structure in which the other end of the cylindrical inner surface 8 has a smooth curved surface 11 or an inclined surface. 6 is a female screw.

The relationship with the peripheral portion will be described with reference to FIG.
Compressed air or cleaning liquid taken in from the outer surface 9 of the flange portion through the fluid supply hole 5 is ejected from the plurality of ejection holes 4 opening to the cylindrical inner surface 8 through the ring-shaped hollow portion 3 to face the end surface 10 of the flange portion. Workpiece 14 to be placed
The inside of the unpenetrated hole 16 can be cleaned and cleaned. Further, the jig bush 1 uses the notch portion 7 and is used for the purpose of positioning the machining tool 17 and the workpiece 14 which is fixed to the machining jig 12 via the fixing member 13. It is possible to repeatedly reproduce the position of the non-through hole 16 processed with respect to 14. Further, when the machining tool 17 rotates, inserts, and moves forward into the jig bush 1, the machining tool 17 and the jig bush 1 are rotated and a force in the pulling direction is applied from the machining jig 12, but they are fixed using the notch portion 7. By fixing it to the processing jig 12 via the member 13, rotation and slipping out are prevented.

Further, when machining the non-through hole 16 of the workpiece 14, the machining tool 17 is first inserted from the other end 19 of the cylindrical inner surface 8 of the jig bush 1 in order to position the machining tool 17. At this time, in order to facilitate the insertion of the machining tool 17 and prevent the machining tool 17 from being damaged, the cylindrical inner surface 8
The structure has a smooth curved surface 11 or an inclined surface that is in contact with the other end 19.

Next, a processing process using the jig bush 1 of the present invention will be described with reference to FIG. First, the processing tool 17 is rotated and moved forward to be inserted into the cylindrical inner surface 8 of the jig bush 1.
At this time, since the other end 19 and the cylindrical inner surface 8 each have a smooth curved surface 11, the machining tool 17 can be easily inserted and the machining tool 17 can be prevented from being damaged. Further, the notch 7 provided on the flange portion 2 of the jig bush 1 is used to fasten the female screw 15 provided on the processing jig 12 together with the bolt head of the fixing member 13. It prevents the forward movement and rotation and the jig bush 1 from coming off and rotating.

When the processing tool 17 cuts the unpenetrated hole 16 of the workpiece 14, cutting oil or cleaning liquid is supplied from the pipe joint 18 attached to the female screw 6 provided on the outer surface 9 of the flange portion of the jig bush 1. Cooling is performed by injecting pressure to remove heat generated by cutting from the machining tool 17 and the workpiece 14. As a result, effects such as improvement of cutting accuracy, reduction of cutting resistance, and extension of tool life can be obtained.

Further, the machining tool 17 advances to the forward end, and after machining the non-through hole 16 in the workpiece 14, the machining tool 1
7 moves backward, returns to the initial position, and stops. At this time, chips are likely to remain inside the unpenetrated hole 16 of the workpiece 14. However, according to the jig bush 1 of the present invention, the cleaning liquid, compressed air, or the like is forced to flow from the pipe joint 18 attached to the outer surface 9 of the flange portion.
It is possible to use the opening of the above as a nozzle to the outside, to discharge the cleaning liquid or the compressed air from this, to clean the inside of the non-through hole 16 and remove the chips inside the hole. As a result, in the next step, the chips are removed from the inside of the hole and the unpenetrated hole 1
When 6 is used as a processing standard, the accuracy can be improved and a great effect can be exerted also in the installation of the automation line.

[0014]

As is apparent from the above description, the jig bushing of the present invention cleans the inside of the unpenetrated hole in the posture during machining without using a special device to improve the cutting accuracy and prevent damage to the tool. It is possible to prevent, increase the tool life, improve the accuracy for the next process, shorten the machining cycle time, and provide a great effect on the installation of the automation line.

[Brief description of drawings]

FIG. 1 is a plan view of a jig bush,

FIG. 2 is a sectional view of a jig bush,

FIG. 3 is a schematic view showing a relationship among a workpiece, a processing jig, and a jig bush,

FIG. 4 is a cross-sectional view of a conventional product.

[Explanation of symbols]

1 Jig Bushing 11 Smooth Curved Surface 2 Flange Part 12 Processing Jig 3 Hollow Part 13 Fixing Member 4 Jet Hole 14 Workpiece 5 Fluid Supply Hole 15 Female Thread 6 Female Thread 16 Non-Through Hole 7 Notch 17 Working Tool 8 Cylindrical Shape Inner surface 18 Pipe joint 9 Flange portion outer surface 19 Other end 10 Flange portion end surface 20 Jig bush 21 Notch portion

Claims (3)

[Claims] 1. A jig bush having a substantially cylindrical shape and having a flange portion at one end thereof, wherein a ring-shaped hollow portion is provided inside the flange portion, and the cylindrical inner surface is communicated toward the end surface of the flange portion and extends outward. A jig bush characterized in that at least one jet hole that opens and a fluid supply hole that communicates with the hollow portion from the outer surface of the flange portion are formed. 2. A notch portion for locking the jig bush and the processing jig through a fixing member at a position that does not interfere with the hollow portion of the flange portion, the fluid supply hole portion and the ejection hole. The jig bush according to claim 1. 3. The jig bush according to claim 1 or 2, wherein the other end of the cylindrical inner surface has a smooth curved surface or an inclined surface.