JPS58120415A - Deburring device for machined groove edge - Google Patents

Abstract

PURPOSE:To remove burrs out of a machined groove edge, by carrying out deburring in a way to add a strong compressive thrust force over the machined groove as well as smoothing the deburred part by means of blasting. CONSTITUTION:In a state that a deburring rod B is inserted into a machined groove 1 of a workpiece A, when the workpiece A is rendered passing through a guide part 4 by the thrust force of a push rod 7, a projecting part 5 of a burr 3 is pushed forward by a cutter 6 relatively sliding on the bottom of the machined groove 1 whereby the burr 3 is removed. Afterward, the workpiece A is taken out of the ensuing guide part 4. The workpiece A subsequently transfers to a guide 9 and a deburred part 8 is finished up by a blast nozzle 10.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for deburring edges of cutting grooves.

As shown in Fig. 1, for example, when cutting a keyway into the boss part of a gear material a and cutting it with a cutting tool c, the keyway or the cutting groove is end face d
A bar IJ f occurs at the edge e ending at .

In the past, Paris was not considered a big problem, but as automation operations have developed recently, Paris has become a nuisance and has caused problems such as not outputting the correct signal, or stopping automation operation without outputting a signal. As this frequently occurs, there has been a demand for an efficient method for removing pars.

For this reason, research on the mechanical diseases of cutting has recently progressed, and as shown in Fig. 2, the plastic deformation region (■) caused by the cutting tool C' is exists in the lower rigidity region U, and this phenomenon causes the occurrence of
The occurrence of cracks occurs when the sharp edge of the tool becomes rounded,
There is also a theory that when the clearance angle wears and the contact with the workpiece increases, the compressive stress area increases below the plane OX, increasing the occurrence of burrs. It has also been observed that a part of the plastic deformation zone that was generating compressive stress swells up.

In addition, the thickness of the root portion where the paris occurs, and the thickness of the paris, becomes thicker, which causes the occurrence of strong rips that cannot be easily removed.

This occurs in view of the fact that there is a slope, and even if there is a bulge in the plastically deformed part that protrudes from the surface OX, even stronger compression and extrusion force is applied to that part to remove the bulge, and furthermore, The purpose of the present invention is to provide a deburring device for the edge of a cutting groove, in which the removed portion is smoothed by plastic processing, and there is no possibility of adverse effects.

The structure of an embodiment of the cutting groove deburring device according to the first invention will be explained based on FIG. 3. Ill formed by cutting ends at the end surface 2 of the workpiece A, Workpiece A (third
The workpiece A shown in the figure is a gear, and includes a guide portion 4 that guides the outer periphery of the groove 1 formed by cutting (the groove 1 represents a keyway), and a guide portion 4 that fits inside the cutting groove 1. There is a deburring rod portion B that relatively slides in the cutting groove 1 (in Fig. 3, the deburring rod portion B is fixed and the workpiece A moves), and the deburring rod portion B slides relatively in the cutting groove 1. If there is a protrusion 5 (a swollen part where the tool passed and received compressive force from the tool) in the cutting $1, the rod part B acts to forcibly push out the protrusion. , a deburring part C is provided in which the cutting edge angle θ is an obtuse angle and the cutting edge 6 is orthogonal to the relative sliding direction 0-O of the deburring part B (see opening in Figure 5). .

Note that 7 in FIGS. 3 and 4 is a part of the fluid drive device (not shown), and indicates a push rod that pushes the workpiece A through the guide portion 4.

Since the embodiment according to the first invention has an inclined configuration, as shown in FIG. 3 (1), the deburring rod B is inserted into the cutting groove 1 of the workpiece A When the workpiece A is pushed into the guide part 4 with the push rod 7, if the protrusion 5 is present at the base of the paris 3, the bottom surface of the cutting groove 1 is moved relative to the bottom surface of the cutting groove 1 as shown in Fig. 3 (2). The cutting blade 6 that has slid onto the protrusion 5
The workpiece A is then discharged from the guide section 4 after the material 3 is removed.

Since the first invention has a structure and function like an inclined top, there is a paris 3 at the edge of the cutting groove 1 of the workpiece, and the base of the paris 3 continues to the protruding part 5 from the bottom of the cutting groove. Even large particles can be removed from the bottom surface without leaving any protrusions.

As shown in Fig. 6, the gear made of sintered alloy has a groove i that works in cooperation with other parts due to the necessity of automation operation, and a groove 7 is added to make the gear arm part j thinner. As shown in the figure, when cutting in the direction of the arrow, the paris 3' is formed at one edge of the groove i in the vertical direction as shown in Figs. 7 and 8. In this case, as shown in FIG. 9, the deburring rod portion B is fixed to the guide surface 4 side that guides the workpiece A, and the cutting blade 6 is attached to the deburring rod portion B.
If it is provided on the side surface as shown in FIG. 7, it can also be used to remove the above-mentioned pad 3'.

The second invention is that when paris 3 is removed according to the first invention, as shown in FIG. Since it is the edge of the groove 1, it may be torn off to form a fractured surface 8.
Parts of Paris may remain. In this case, the remaining paris has also become brittle due to severe plastic deformation, so either these two parts are finished with a smooth surface using a plastering device, or the remaining paris is completely removed. , 3rd
To explain the structure using the embodiment shown in the figure, the workpiece A discharged from the guide part 4 is transferred to the guide 9, and the plasto nozzle 10 provided on the lower surface of the guide 9 is used to cut the surface cut by the cutting blade 6. Of course, the fractured surface 8 is finished into an r-plane with a radius of about 0.1, and if there is any remaining paris 3, it is also completely removed.

Since the second invention has a configuration 1 effect like an upward slope, it is difficult to use automation, especially when the above-mentioned protrusion exists, even if conventionally the cutting part was deburred by plastic processing and the inside of the cutting groove was attempted to be smoothed. Although it has not been possible to obtain grooves that can accurately engage cooperating parts necessary for operation, by implementing the second invention, the intended purpose can be completely achieved.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram illustrating the occurrence of burrs when cutting a keyway with a parting tool, Fig. 2 is an explanatory diagram of the burr generation mechanism,
3 is a longitudinal sectional front view of an embodiment of the device for deburring the edges of cutting grooves according to the first and second inventions, FIG. 4 is a left side view of FIG. 3, and FIG. ) is a front view of the main part of the barrel part B, Figure 5 (b) is its bottom view, Figure 6 is a front view of the gear with the shoulder extending out from the side edge of the groove, and Figure 7 shows the front view of the gear with the shoulder extending out from the side edge of the groove. FIG. 8, which is an explanatory diagram of one embodiment of the deburring rod part when it comes out on the side edge, shows the location where the deburr occurs. FIG. 9 is a longitudinal cross-sectional view of the gear shown in FIG. 6, and FIG. 9 is a side view of the deburring device for the edge of the cutting groove of the gear shown in FIG. 3 is Paris, 5 is protrusion. 6 is the cutting blade, A is the workpiece, B is the deburring rod part, and C is the deburring part5. D indicates the blasting device, 0-O indicates the relative sliding direction of the rod portion B, and θ indicates the cutting edge angle of the cutting blade 6, respectively. Patent applicant Fuji Seiki Seisakusho Co., Ltd.

Claims (1)

[Claims] tl) A groove 1 formed by cutting ends at an end face 2 of the workpiece A, and guides the outer periphery of the workpiece A where a paris 3 is generated at the edge of the cut groove 1. There is a guide portion 4 that moves along the cutting groove 1, and a deburring rod portion B that fits inside the cutting groove 1 and slides relatively through the cutting 1jIII. The blade angle θ is an obtuse angle, and the cutting edge 6 is the deburring rod part B
A deburring portion C perpendicular to the relative sliding direction O-0 of
A deburring device for the edge of a cutting groove, characterized in that it is provided with: (2) A guide section 4 that guides the outer periphery of the workpiece A in which the groove 1 formed by cutting ends at the end face of the workpiece A, and the edge of the cutting groove has a burr; There is a deburring rod part B that fits inside the cutting groove 1 and relatively slides in the cutting groove 1, and the deburring rod part B has an obtuse cutting edge angle θ and a cutting edge 6. is the relative sliding direction o- of the paring rod part B
An edge of a cutting groove characterized in that a deburring part C is provided orthogonal to o, and a blasting device is further provided to make the deburred part of the workpiece A into an arcuate surface. Deburring device.