JPS60201814A - Deburring tool and removal of burrs - Google Patents

Abstract

PURPOSE:To perfectly remove the burrs in the spaces between projected parts in an annular edge part by radially holding at least two share points having the elastic force of a cutting edge corresponding to a burr forming surface and allowing a burr removing tool to contact and displace along the cutting-burr forming surface. CONSTITUTION:A burr-removing tool 2 holds share points 22 having a cutting edge 21 having an acute angle for cutting the cutting burrs 14 radially from the center part, and the thin long share point 22 is inserted easily into the spaces 15 between projected parts of a work 1. When a tool shaft 24 is revolved in the axial direction, the share point 22 contacts with the cutting-burr forming surface 16 of the work 1, and the share point 22 is bent by the amount shown by the arrow B by the elastic force of the share point 22 in the state where a constant pushing force is applied, and the burrs 14 can be removed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field] The present invention relates to a burr removal tool and a burr removal method for removing cutting burr formed on an annular convex portion.

[Prior art].

When processing a molded product that is annular and has a plurality of convex portions at its end, the molded product is often cut intermittently, and if continuous cutting is performed at this time, cutting edges will be formed on the side surfaces of the convex portions. Conventionally, in order to remove these cutting burrs, the cutting burrs were removed by pushing a burr removing cutter provided between the convex portions of the object to be cut (the molded product) so as to fit the shape of the object.

For example, FIG. 1 shows a workpiece 1 used inside a vehicle transmission. This workpiece 1 has a plurality of convex portions 11 formed at one end thereof for spline fitting with other parts, and then a groove 12 into which a snap ring is fitted is formed on the inner peripheral surface of the convex portion 11. In order to form the end face of the convex portion 11 into a tapered shape 13, continuous cutting is performed in the − force direction. With this process, a second
Cutting holes 14 are formed as shown in the figure. This cutting burr 14 is harmful when used in a vehicle transmission and must be removed. Conventionally, in order to remove the cutting burr 14 formed on the workpiece 1, the workpiece 1 shown in FIG. ) is used to push the protrusion 31 of the deburring cutter 3 into the gap 15 between the protrusions of the workpiece 1, thereby removing one of the protrusions 11 on which the cutting burr 14 is formed. The cutting burr 14 formed on the cutting burr forming surface 16 on the side surface was removed. However, as shown in FIG. 4, the deburring result of the conventional deburring cutter 3 is based on the fact that the protrusion 31 of the deburring cutter 3 takes into consideration the variations in the machining of the protrusions 11 and the spaces between the protrusions 15 formed on the workpiece 1. Due to the clearance amount A generated between the protrusions 31 and the protrusions 11, which are provided to be inserted between the protrusions 15 of the workpiece 1, it was not possible to remove the cutting burr 14 with the clearance iiA. Further, it is difficult to uniformly remove the convex portions 11 and the gaps between the convex portions 15 due to machining variations, and due to the machining variations and the clearance HA, there are cases in which the cutting burrs 14 are not removed at all.

[Object of the Invention] An object of the present invention is to provide a deburr removal tool and a deburr removal method that can simultaneously and completely remove the deburrs formed on a plurality of convex portions provided at an annular end.

[Structure of the Invention] The deburring tool according to the first aspect of the present invention has a cutting blade corresponding to the cutting burr forming surface of the workpiece, a cutting edge having elastic force, and two or more cutting edges arranged in a radial direction. The deburring method of the second invention comprises a cutting edge that corresponds to the cutting burr forming surface of the workpiece and has an elastic force; The burr removing tool, which is composed of the radially held holding portions, is brought into contact with the cutting bar 0 forming surface and elastically deformed to be displaced along the cutting burr forming surface.

[Effects of the Invention] In the deburring tool and deburring method of the present invention having the above-mentioned configuration, a plurality of elastic cutting edges are pressed against the burr forming surface during cutting of a plurality of convex portions provided at an annular end. Since the cutting burr O is removed, it absorbs the unevenness between the protrusions and the protrusions due to processing variations in the protrusions, and it is possible to remove multiple cutting burrs at the same time without creating clearance between the cutting edge and the protrusions. can.

[Example] Next, a deburring tool and a deburring method of the present invention will be described based on an example shown in FIGS. 5, 6, and 7.

Reference numeral 1 denotes a workpiece of an annular cut object that is an internally used part of an automatic transmission for automobiles, and a plurality of protrusions 11 are formed on one end side to be spline-fitted with other parts. . This work 1 includes a groove 12 in which a snap ring is fitted in the inner periphery of the protrusion 11, and a tapered shape 1 on the outer end surface of the protrusion 11.
3, continuous cutting is performed in one direction, and a cutting burr 14 is formed on one side of the convex portion 11 of the workpiece 1, as shown in FIG. .

2 is a deburring tool according to the present invention made of high-speed tool steel for removing cutting burrs 14 formed on the workpiece 1;
2, and a holding part 23 that holds the cutting edges 22 in number 15 between the convex parts (concave parts) of the workpiece 1 radially from the center corresponding to the cutting edge forming surface 16 of the convex part 11 of the workpiece 1. The cutting edge 22 is formed to be elongated in the outer circumferential direction, so that the cutting edge 22
When the tool shaft 24 that drives the deburring tool 2 is rotated in the axial direction, the cutting edge 22
is in contact with the cutting edge forming surface 16 of the workpiece 1, and is bent by the elastic force of the cutting edge 22 by the amount shown by the arrow B in FIG. 6 when a certain pressing force is applied.

Next, a burr removal method for removing cutting burrs 14 from the workpiece 1 using the burr removal tool 2 having the above-mentioned configuration will be described.

4 is a deburring device for removing cutting burrs 14 formed on the workpiece 1 using the deburring tool 2 of the present invention; the workpiece 1 is attached to the lower part of the deburring tool 2 from the outside; A workpiece picking mechanism 41 (=I mechanism 41 that takes out the workpiece 1 from the outside of the deburring device 4, a workpiece fixing mechanism 42 that positions the workpiece 1 and fixes and releases the workpiece 1, and a workpiece pick-up mechanism 42 that takes out the workpiece 1 from the outside of the deburr removal device 4), a workpiece fixing mechanism 42 that positions the workpiece 1, and fixes and releases the workpiece 1, and a A tool twisting mechanism 44 that presses the cutting edge 22 of the deburring tool 2 against the cutting burr forming surface 16 of the workpiece 1 with a constant pressure, The workpiece mounting mechanism 41 is a payout cylinder 41A, and the workpiece fixing mechanism 42 is a clamp cylinder 42.
The A1 tool lifting mechanism 43 is a tool lifting cylinder 43A.
1 tool twisting mechanism 44 is driven by tool twisting cylinders 44A, cylinders 41A, 42A, 43A, respectively.
.

44A is a control panel 45 provided on the back of the paris removal device 4
and is driven and controlled by a hydraulic unit 46.

First, the workpiece 1 is mounted using the workpiece mounting mechanism 41 so that the convex portion 11 of the workpiece 1 is located below and above the deburring tool 2. The cutting edge 22 of the deburring tool 2 is positioned so as to be inserted between the convex portions 15 of the work 1, and the work 1 is fixed by the work fixing mechanism 42.

The deburring tool 2 is lowered by the tool adjoining mechanism 43 so that the cutting blade 21 of the deburring tool 2 is below the cutting burr 14. The tool twisting mechanism 44 presses the cutting blade 21 against the cutting paris forming surface 16 with a constant pressure, and bends the cutting edge 22. The deburring tool 2 is pulled up to its original position by the tool mechanism 43 while keeping the cutting edge 22 bent. At this time, the cutting blade 21 pressed against the cutting burr forming surface 16 can scrape off all the cutting burrs 14 formed on the cutting burr forming surface 16. Next, the workpiece 1 is released by the workpiece fixing mechanism 42, and the workpiece 1 from which the cutting burr 14 has been removed is taken out from the burr removing device 4 by the workpiece attaching mechanism 41.

In the above embodiment, the protrusions 11 are arranged at equal intervals on the cutting edge 22.
Although the cutting burrs 14 are arranged radially at equal intervals, the cutting edge 22
can be formed and used accordingly.

In the above embodiment, the workpiece 1, which is the object to be cut, is fixed so that the space between the protrusions 15 opens upward, and the cutting burr 14 is fixed between the protrusions 11 and 15.
Since the cutting burr 14 was formed on the opening side of the workpiece 1, the cutting burr 14 was scraped off by pulling up the cutting edge 22.
If the protrusions 15 of the protrusion 15 are fixed to open on the other side, or if the cutting burr 14 is formed on the back side or in the middle of the protrusion 11, the cutting burr 14 can be removed by sliding the cutting edge 22 in the other direction. It's okay.

In the above embodiment, the holding portion 23 is provided on the inner circumferential side of the cutting edge 22, but it may also be provided on the outer circumferential side.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of a workpiece to be cut, Fig. 2 is an enlarged perspective view of a convex portion of the workpiece, Figs. 3 and 4 are explanatory diagrams of the operation of a conventional deburring cutter, and Figs. FIG. 6 is an explanatory diagram of the operation of the deburring tool according to the present invention, and FIG. 7 is a perspective view of the deburring device. In the diagram 1... Workpiece 2... Deburring tool 16
... Cutting paris forming surface 21 ... Cutting blade 22 ...
Cutting edge 23...Holding section representative Kenji Ishiguro Fig. 1 13 Fig. 2 3 Fig. 3

Claims (1)

[Scope of Claims] 1> Deburring comprising a cutting edge having a cutting edge corresponding to the cutting burr forming surface of the workpiece and having an elastic force, and a holding part that holds two or more of the cutting edges radially. tool. 2) The deburr removal tool has a cutting edge corresponding to the cutting burr formation surface of the workpiece, and is composed of a blade tip with elastic force and a holding part that holds two or more radial cutting edges. A deburr removal method that makes contact with a surface and causes elastic deformation, causing displacement along the cutting deburr forming surface. 3) The deburring tool according to claim 1, wherein the cutting edge has an elongated shape to provide elasticity and is integrally provided on the outer periphery of the holding portion.