JP2953822B2 - Deburring method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for removing burrs of a part having a plurality of teeth provided in a circumferential direction on an inner circumferential surface and having grooves formed in the teeth in the circumferential direction.

[0002]

2. Description of the Related Art For example, a component having a plurality of teeth provided in a circumferential direction on an inner peripheral surface thereof and a groove formed in the circumferential direction, such as a retainer, is used for an automobile part.

[0003] In this case, when a groove is formed in this kind of part, there is a problem that burrs are likely to be generated particularly on the side where the cutting tool is separated from the groove. That is, as shown in FIG. 5, when a cutting tool (not shown) is moved to the teeth 4 of the component 2 in the direction of the arrow, a groove 6 is formed in the circumferential direction of the teeth 4 and the cutting tool is moved to the side where the cutting tool is released. The burrs 8 protrude into the tooth spaces 7 and remain.

[0004] Therefore, a rough turning step of moving the tool in one direction along the direction in which the teeth are arranged to form a groove, a finishing turning step of moving the tool in a direction opposite to the one direction, and a finishing turning step of these steps. There is proposed a deburring method characterized by having a chamfering step of forming a slope on the end face of the groove on the side from which the cutting tool separates during finishing turning (see Japanese Patent Application Laid-Open No. 2-243224).

[0005]

However, in the above-mentioned prior art, since three steps of a rough turning step, a chamfering step and a finishing turning step are set, it is effective for preventing burrs, but the number of steps is large. The problem is that production efficiency is poor.

An object of the present invention is to solve such a problem, and an object of the present invention is to provide a method and an apparatus capable of reliably removing burrs and having excellent productivity.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a component having a plurality of teeth provided on an inner peripheral surface in a circumferential direction and a groove formed in the circumferential direction on the teeth. A method for removing burrs, wherein a step of retracting a cutter corresponding to the tooth groove shape of the part in a radial direction in the insertion groove of the cutter body, and a step of relatively positioning the cutter body and the part. And a process in which the cutter is advanced radially outward in the insertion groove of the cutter body to engage the cutter with the tooth groove, and the cutter body and the component are moved in the width direction of the cutter and Removing the burrs remaining in the tooth space by relatively moving in a direction away from each other.

Further, the present invention relates to a device for removing burrs of a part, wherein a plurality of teeth are provided in a circumferential direction of an inner peripheral surface, and a groove is formed in the teeth in a circumferential direction. A cutter having a corresponding shape, a cutter body provided with an insertion groove for inserting the cutter, a displacement means capable of displacing the cutter in a radial direction of the cutter body in the insertion groove, and the cutter; a state where the tooth engaged, and the cutter body and the component, with and a relatively movable moving means and the tooth width direction and away from each other of the cutter, the displacement means
Is an elastic body that presses the cutter into the insertion groove,
Formed between the cutter and the cutter body
By introducing a fluid into the opening, the cutter is
And a fluid supply unit for displacing the day radially outward .

[0009]

In the deburring method according to the present invention described above, the cutter body and the component are connected to each other while the cutter corresponding to the tooth groove shape of the component is retracted radially inward in the insertion groove of the cutter body. Are relatively positioned, the cutter advances radially outward in the insertion groove of the cutter body and engages with the tooth space. Furthermore, the cutter body and the component are relatively moved in the direction of the face width of the cutter and in the direction away from each other, and the burrs remaining in the tooth space are removed by the cutter. Therefore, the burrs generated by the groove forming process are reliably removed via the cutter, so that only a single turning step and a deburring step are required, and workability is improved.

Further, in the deburring apparatus according to the present invention,
After the cutter is displaced radially outward in the insertion groove of the cutter body by the displacing means and engages with the tooth groove of the component, the cutter body and the component are moved via the moving means into the tooth width direction of the cutter. And the burrs which move relatively in the direction away from each other and remain in the tooth space are reliably and efficiently removed.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a deburring method and apparatus according to the present invention.

In FIG. 1, reference numeral 10 denotes a deburring apparatus for performing a deburring method according to the present embodiment. The deburring apparatus 10 includes a plurality of cutters 12 having a shape corresponding to the tooth grooves 7 of the component 2, a cutter body 16 provided with a plurality of insertion grooves 14 for inserting these cutters 12, The insertion groove 14
In the radial direction of the cutter body 16 (direction of arrow A)
When the cutter 12 and the tooth groove 7 are engaged with each other, the component 2 is moved in the tooth width direction (arrow B direction) of the cutter 12 and in a direction (arrow B1) in which the cutter 2 and the tooth groove 7 are engaged. (Moving means) 20 which is movable in the direction (1).

As shown in FIG. 2 and FIG.
2 has a base portion 22, a groove 24 is formed along the longitudinal direction on the bottom surface of the base portion 22, and a cutter body 26 is provided by cutting off both upper sides of the base portion 22. . A plurality of chip discharge grooves 28 are formed on the upper portion of the cutter body 26 at predetermined intervals in the longitudinal direction, and the chip discharge grooves 28 provide cutting blades 30a and 30b.

The cutter body 16 has a cylindrical shape, and a plurality of insertion grooves 14 are formed at an outer peripheral end of the cutter body 16 at predetermined angular intervals. The insertion groove 14 is expanded inward through a step 32, and the base portion 22 of the cutter 12 is movably fitted in the insertion groove 14. Leaf springs (elastic bodies) 34a, 34 are attached to the base 22 and the step 32.
b are in contact with each other, and the leaf springs 34a, 34a
The substantially middle portions of b engage with each other to press the cutter 12 into the insertion groove 14, and the cutting blades 30 a and 30 b are arranged on substantially the same plane as the outer peripheral surface of the cutter body 16.

The displacement means 18 has a pressure air supply source (not shown).
Is connected to the groove 24 of the cutter 12 via a passage 36 as a fluid supply unit formed in the cutter 12.

The moving means 20 includes a cylinder 38, a connecting plate 42 is fixed to a piston rod 40 extending from the cylinder 38, and a plurality of push rods 44, one ends of which are fixed to the connecting plate 42, are connected to the other end by a ring. Dispensing member 46
Is held. A tapered portion 48 that expands outward is formed in the inner peripheral portion of the tip of the dispensing member 46, and air blow passages 50a and 50b that communicate with a pressure air supply source (not shown) are provided at a plurality of locations. ing.

An air nozzle portion 52 is formed at a predetermined portion of the cutter body 16 for guiding air toward the component 2 and detecting the back pressure of the component to confirm the presence or absence of the component 2.

Next, the operation of the thus-configured deburring apparatus 10 will be described.

First, the part 2 is subjected to turning to form a groove 6 in each tooth 4 along the circumferential direction. On the other hand, FIG.
As shown in the figure, each cutter 12 is provided with a leaf spring 34a, 34
Due to the resiliency b, it is pressed inward of the insertion groove 14, that is, toward the center of the cutter body 16.

Then, after the cutter body 16 is inserted into the component 2 and positioned with respect to each other, when pressurized air is supplied to the passage 36 from a not-shown pressurized air supply source constituting the displacement means 18, the pressurized air is It is introduced into a groove 24 formed in each cutter 12. For this reason, the cutter 12 moves radially outward of the cutter body 16 against the elastic force of the leaf springs 34a, 34b, and the cutting blade 30a,
30b is further projected outward from the outer peripheral surface of the cutter body 16 to engage with each tooth 7 of the component 2 (see FIG. 4).

At this time, since the cutter 12 is displaced outward by the pressure of air, the cutter 12
The position is adjusted according to the shape of the tooth portion 7 and the tooth portion 7 is accurately positioned.

Next, the cylinder 3 constituting the moving means 20
When the piston rod 40 extends toward the component 2 (in the direction of the arrow B1) under the driving action of 8, the dispensing member 46 moves toward the component 2 via the connecting plate 42 and the push rod 44 fixed to the piston rod 40. I do. Therefore, the tapered portion 48 of the dispensing member 46 points the end of the component 2 to the arrow B1.
The cutting blade 30a of the cutter 12 and the tooth groove 7 of the component 2 move in a direction (direction of arrow B) in which the cutting blade 30a of the cutter 12 and the tooth space 7 of the component 2 are relatively separated from each other. Therefore, the flash 8 remaining in the tooth space 7 of the part 2
Is reliably removed by the cutting blade 30a. At this time, the cutting chips are led out of the plurality of chip discharge grooves 28 formed on the upper portion of the cutter 12 and are discharged to the outside by the pressurized air supplied to the passages 50a and 50b of the dispensing member 46.

In this case, in this embodiment, after the part 2 is subjected to turning to form a groove 6 in the tooth 4 along the circumferential direction, a plurality of cutters 12 are engaged with each tooth groove 7. The burrs 8 remaining in the tooth grooves 7 are removed. For this reason, conventionally, the rough turning process, the chamfering process and the finish turning process
Although the process was set, it can be reduced to two processes, a single turning process and a deburring process, and the efficiency of the entire operation can be easily achieved, and productivity can be improved all at once. Is obtained.

In addition, since the cutter 12 moves back and forth in the direction of arrow A by using compressed air, the cutter 12 can be made to exactly follow the tooth space 7 of the component 2 and
It is possible to effectively prevent chips and the like from entering between the cutter 12 and the cutter body 16 due to pressure air led out through a small gap between the base portion 22 and the cutter body 16. Become.

The cutter 12 has cutting edges 30a, 3a
Since the cutting edge 30b is provided, when the cutting edge 30a is damaged, the cutter 12 can be turned over and the cutting edge 30b can be used, so that there is an advantage of being economical.

[0026]

According to the deburring method and apparatus according to the present invention, the following effects can be obtained.

After the cutter body and the part are relatively positioned, the cutter corresponding to the tooth groove shape of the part advances radially outward and engages with the tooth groove. Since the parts and the parts are relatively moved to remove the burrs of the tooth space, the burrs generated by the groove forming process
It is reliably removed via the cutter. For this reason, two processes, a single turning process and a deburring process, are sufficient, and workability is improved at a stroke.

[Brief description of the drawings]

FIG. 1 is a partial sectional side view of a deburring apparatus according to one embodiment of the present invention.

FIG. 2 is a partially enlarged front view of the deburring device.

FIG. 3 is a perspective explanatory view of a cutter constituting the flash removing device.

FIG. 4 is an explanatory diagram of the operation of the flash removing device.

FIG. 5 is a partial perspective explanatory view of a component.

[Explanation of symbols]

 2 Part 4 Teeth 7 Tooth groove 8 Burr 10 Burr removing device 12 Cutter 14 Insertion groove 16 Cutter body 18 Displacement means 20 Moving means 22 Base part 24 Groove parts 30a, 30b Cutting Blades 34a, 34b Leaf spring 36 Passage 38 Cylinder 46 Discharge member 48 Tapered portion

Claims (2)

(57) [Claims] 1. A method for removing burrs of a part, wherein a plurality of teeth are provided in a circumferential direction on an inner peripheral surface and grooves are formed in the teeth in a circumferential direction, the cutter corresponding to a tooth groove shape of the part. Retreating radially inward in the insertion groove of the cutter body, positioning the cutter body and the component relative to each other, and radially outwardly moving the cutter in the insertion groove of the cutter body. The cutter body and the component are engaged with each other, and the cutter body and the component are relatively moved in the direction of the tooth width of the cutter and away from each other and remain in the tooth space. Removing the burrs. 2. A device for removing burrs of a part, wherein a plurality of teeth are provided in a circumferential direction of an inner peripheral surface, and a groove is formed in the teeth in a circumferential direction. A cutter body having an insertion groove for inserting the cutter, a displacement means capable of displacing the cutter in the insertion groove in a radial direction of the cutter body, and a cutter and a tooth groove. In an engaged state, the cutter body and the component are provided with a moving unit that is relatively movable in a direction of the tooth width of the cutter and in a direction away from each other, and the displacement unit is configured to insert the cutter into the insertion unit. Press into the groove
Elastic body , formed between the cutter and the cutter body.
By introducing a fluid into the opening, the cutter is
A fluid supply unit for displacing the day radially outward .