JP2000126828A - Deburring method, and deburring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely remove an inner burr from a work, to lock the inner burr to an upper punch and hold it thereby, and to stably carry the separated inner burr and a base body to the next process. SOLUTION: A projection is formed on a depth side of an opening of an upper punch member 1, an inner burr 34 punched by a drawing punch 20 and the projection is formed and swollen outwardly in the radial direction, and the deformed inner burr 34 is locked to and held in the upper punch member 1. The inner burr 34 is pressed against the surface of an inner circumference of the upper punch member 1, and can surely be locked and held.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deburring method for removing inner burrs from a work formed by press molding, forging, etc. and having at least inner burrs, and for reliably separating at least the inner burrs from a substrate, and a method for removing the burrs. Deburring apparatus for performing the method.

[0002]

2. Description of the Related Art In a manufacturing method such as press molding or forging, a burr removing step for removing burrs generated on a product surface in a molding step is required. After the deburring step, processing steps such as coining and bending are often performed. Therefore, in order to improve productivity, it is desirable that the forming step, the deburring step, and the processing step be performed on an integrated automatic line. For that purpose, it is necessary to surely separate the substrate and burrs of the work without using a manual operation, and to convey only the substrate in the line.

In the case of a work having an annular portion,
Since outer burrs and inner burrs are generated on the outer peripheral surface and the inner peripheral surface of the annular portion, it is necessary to remove both the outer burrs and the inner burrs. In such a case, the outer burrs are punched by an outer punching die while holding the work on the die, and the inner burrs are punched by the upper punch. In this case, the outer burrs are held by the dies, the inner burrs fall downward from the punch holes provided in the dies, and the base of the product is attached to the outer surface of the upper punch by the inner peripheral surface of the annular portion being attached to the outer peripheral surface of the upper punch. It is separated from burrs and inner burrs.

However, in the above-mentioned deburring apparatus, there have been problems that the inner burr adheres to the end face of the upper punch and does not fall, or that the base adheres insufficiently to the upper punch and falls during transportation. . In such a case, it is necessary to stop the apparatus and manually move the base and the burrs to a predetermined position, which is troublesome and causes a reduction in productivity such as a stop of the production line.

Therefore, in the microfilm disclosed in Japanese Utility Model Publication No. 8-79444 or Japanese Utility Model Application Laid-Open No. 61-67929, a projection is provided on the lower die, and inner burrs formed by punching with the upper punch are projected with the upper punch. There is disclosed a deburring method for pressing and holding the inner wall of the portion. According to these deburring methods, the inner burr can be reliably separated from the base and the upper punch.

However, in the above-described deburring method, since both the burr and the substrate remain in the lower die, it has been difficult to select and transport the burr and the substrate using a general-purpose automatic sorting apparatus. Therefore, Japanese Utility Model Laid-Open No. 5-76636 discloses a deburring apparatus in which a notch is provided on the outer peripheral surface of an upper punch and an air eject hole is provided on the lower end surface of the upper punch. According to this deburring apparatus, the inner peripheral surface of the annular portion of the base bites into the outer peripheral surface of the upper punch due to the indentation, and the inner burr adhered to the end face of the upper punch can be dropped by blowing air from the air eject hole.

Therefore, if the inner burr and the outer burr are left on the lower die and the base is held on the upper punch using this deburring apparatus, the base and the burr can be automatically selected and conveyed, and the apparatus is stopped. The substrate and the burr can be reliably separated without the need, and the productivity is improved.

[0008]

However, Japanese Utility Model Laid-Open No. 5-7.
In the deburring apparatus described in Japanese Patent No. 6636, the annular portion of the base is held on the outer peripheral surface of the upper punch, that is, the upper punch is inserted only into the punched hole of the inner burr. Therefore, there is no problem when the annular portion is located at the center of gravity of the work, but when the annular portion is located at a position deviated from the center of gravity of the work, the base after burr punching is supported only by the upper punch at a distance from the center of gravity. As a result, the sheet may become unstable and may drop during the conveyance.

The present invention has been made in view of the above circumstances, and reliably removes an inner burr from a work and locks and holds the inner burr on an upper punch. The purpose is to be able to transport to the process.

[0010]

According to a first aspect of the present invention, there is provided a deburring method for separating an inner burr from a work having an inner burr on an inner peripheral surface of an annular portion of a base. Wherein the first punch having a substantially flat projection pressing surface of the base presses the base from one side, and the second punch presses the inner burr in a direction opposite to the pressing direction of the first punch to remove the inner burr. A deburring step of positioning the removed inner burrs in the first punch, and a burr forming step of forming the inner burrs radially outward in the first punch. The bulged inner burr is pressed against the inner peripheral surface of the first punch to lock and hold to separate the inner burr from the base.

A feature of the deburring apparatus according to the second aspect is that a work having an inner burr on the inner peripheral surface of the annular portion of the base has a pressing surface in a substantially planar projection shape of the base of the base and an opening corresponding to the annular portion. And a second punch member having a centering punch capable of moving into and out of the opening of the first punch member following the inner peripheral shape of the annular portion, and having an inner periphery deeper than the opening of the first punch member. The surface has a molded part projecting beyond the clearance between the inner peripheral surface of the first punch member and the outer peripheral surface of the core punch, and the inner burr separated from the base is pressed by the molded part and the core punch. An object of the present invention is to enable molding in which inner burrs bulge radially outward.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the deburring method of the present invention, first, in a deburring step, a substrate is placed on a die or the like, and the substrate is pressed by a first punch having a pressing surface having a substantially planar projection shape of the substrate. At the same time, the inner burr is pressed by the second punch in a direction opposite to the pressing direction of the first punch. Since the base has an annular portion, the pressing surface of the first punch has an opening through which the second punch enters and exits. The base is pressed by the pressing surface of the tip of the first punch, and the inner burr is pressed by the second punch in a direction opposite to the pressing direction of the first punch, so that a shear stress is generated between the inner burr and the base. . As a result, the inner burr is cut from the base, and the removed inner burr is located in the first punch.

When the substrate has external burrs, a step of removing external burrs can be carried out simultaneously with or before or after this step of removing burrs. For example, in order to perform simultaneously with the deburring step, a cutting blade is provided on the outer periphery of the first punch or the second punch, and the shear force acting between the cutting blade and the die when pressing the substrate with the first punch is used. Outside burr can be pulled out.

In the next burr forming step, forming is performed in which the inner burr bulges radially outward in the first punch. That is, even if the outer diameter of the inner burr is smaller than the inner diameter of the opening of the first punch, the diameter of the inner burr becomes larger than the inner diameter of the opening due to bulging in the burr forming process, and the inner burr is surely inserted into the first punch. Locked and held. This burr forming step can be performed using another apparatus, but is desirably performed continuously after the burr removing step using the first punch and the second punch as described later.

The movements of the first punch and the second punch are relative. Even if the first punch is fixed and the second punch is moved, the second punch is fixed and the first punch is moved. It's the same thing. The same applies to the case where a cutting blade excluding outer burrs is provided. Further, the deburring apparatus of the present invention includes a first punch member and a second punch member,
The work includes a base having an annular portion and an inner burr formed on an inner peripheral surface of the annular portion. An outer burr may be provided on the outer periphery of the annular portion.

The first punch member has a pressing surface in a substantially planar projection shape of the base and has an opening corresponding to the annular portion, and the second punch member follows the inner peripheral shape of the annular portion and has an opening of the first punch member. It has a centering punch that can enter and exit the machine. On the inner peripheral surface deeper than the opening of the first punch member, a formed portion is formed which projects beyond the clearance between the inner peripheral surface of the first punch member and the outer peripheral surface of the core punch. The first punch member or the second punch member may be provided with a cutting blade excluding outer burrs.

Therefore, in the deburring apparatus of the present invention, first, the work is placed on the second punch member, the first punch member and the second punch member come close to each other, and the pressing surface of the first punch member connects the base to the second punch member. Press toward the punch member. Then
The base is pressed from one side by the pressing surface of the first punch member, and the inner burr is pressed in the opposite direction by the coring punch.
That is, a shear stress is generated between the inner burr and the base, and the inner burr is cut from the base. When the workpiece has an outer burr, the outer burr is cut by the cutting blade synchronously or not with the inner burr.

Next, when the first punch member and the second punch member come closer to each other, the cut inner burr is pressed by the coring punch and moves further inside the opening. Then, the cut inner burrs are pressed by the forming portion and the core punch, so that they bulge radially outward and are pressed against the inner peripheral surface of the first punch member. As a result, the inner burr is locked and held in the first punch member to prevent the inner burr from falling, and the base remains on the second punch member, so that only the base can be automatically conveyed.

In the case where the outer burr is provided on the outer periphery of the work, it is preferable that the outer burr separated from the base is locked and held by the locking portion on the outer periphery of the first punch member.
Accordingly, the outer burr and the inner burr can be simultaneously locked and held by the first punch member, and the separation of the burr and the removal of the base can be performed more reliably. Therefore, according to the deburring method and the deburring apparatus of the present invention, since the base can be configured to remain on the first punch member, the base is dropped at a position shifted from the center of gravity as in the conventional deburring apparatus. Problems such as are avoided. Further, since at least the inner burr is securely locked and held by the first punch member, the inner burr is separated from the base without falling down. As a result, manual work and stoppage of the apparatus are avoided, and productivity is significantly improved.

The forming portion may be formed so as to make a full circle around the inner peripheral surface of the first punch member, or may be provided on a part of the inner peripheral surface of the first punch member. It is preferable to provide a plurality of parts symmetrically at equally divided positions.
As a result, the inner burr falls horizontally at the time of knockout, so that the transfer can be stably performed. The amount of protrusion of the formed portion from the inner peripheral surface of the first punch member may be such that at least a part of the diameter of the inner burr bulged in the burr forming step is larger than the opening diameter. By adjusting the protrusion amount, the locking force of the inner burr to the first punch member can be adjusted.

[0021]

The present invention will be described below in detail with reference to examples. 1 to 4 show a deburring apparatus of the present embodiment. This deburring device includes an upper punch member 1 and a lower punch member 2, and is configured to dispose a work 3 between the upper punch member 1 and the lower punch member 2 to perform deburring.

The work 3 is formed by forging, and as shown in a plan view in FIG. 5, a base 30 having two holes 31 and 32, and an outer burr 33 projecting to the outer periphery of the base 30.
And inner burrs 34 formed in the holes 31 and 32. The upper punch member 1 includes a pressing punch 10 that can move up and down by a press stroke of a crank press,
A cylinder comprising a pressing punch 10 disposed at the center of the pressing punch 10 and a knockout pin 11 disposed so as to be relatively movable in the axial direction; Form part 13 is formed.

This cylindrical portion 13 has an opening 14 at the tip,
As shown in FIG. 4, projections 15 are formed on the inner peripheral surface at the back of the opening 14 at positions equally divided into four parts on the entire circumference. A tapered surface 16 whose thickness gradually increases from the tip is formed on the outer peripheral surface. The lower punch member 2 includes a coring punch 20, a receiving plate 21 disposed on the outer periphery of the coring punch 20 and having a receiving surface 22 having a substantially planar projection shape of the substrate 30, and a cutting device having an inner peripheral blade having an outer peripheral shape of the substrate 30. And a blade 23. The centering punch 20 is connected to a hydraulic device (not shown) and is arranged so as to be vertically movable.
A hydraulic cushion spring 24 for urging the tray 21 upward is disposed below the tray 21.

Then, as shown in FIG.
The outer peripheral shape of 0 is slightly smaller than the inner peripheral shape of the cylindrical portion 13 and a clearance (d) is secured, thereby preventing interference with each other when removing burrs. The projections 15 are formed so as to project beyond the clearance (d) from the inner peripheral surface of the cylindrical portion 13. In this deburring apparatus, first, as shown in FIG.
The work 3 is placed so that is positioned. At this time, the outer burr 33 is located on the cutting blade 23. In addition, the work 3 is shown by an AA cross section in FIG.

Next, after the pressing punch 10 descends and the pressing surface 12 comes into contact with the base 30 as shown in FIG. 1, the receiving tray 2 is pressed against the urging force of the hydraulic cushion spring 24 via the base 30.
Press 1 downward. On the other hand, the downward movement of the outer burr 33 is restricted by the cutting blade 23. As a result, a shearing force acts between the outer burr 33 and the base 30, and as shown in FIG. 2, the ring-shaped outer burr 33 is cut at the base by the cutting blade 23 and separated from the base 30.

When the pressing punch 10 further descends, the ring-shaped outer burr 33 engages with the tapered surface 16 on the outer side of the cylindrical portion 13, and as shown in FIG. Locked and held. On the other hand, the centering punch 20 rises from the lower punch member 2, and the inner burr 34
Is pressed upward. Thus, a shearing force acts between the base 30 and the inner burr 34, and the inner burr 34 is cut from the base 30 as shown in FIG. Then, by further raising the centering punch 20 and lowering the pressing punch 10, the cut inner burr 34 comes into contact with the four protrusions 15 inside the cylindrical portion 13 and is pressed by the protrusions 15 and the centering punch 20. .

As a result, the inner burr 34 is compressed and formed.
At the positions of the projections 15, the protrusions 15 are uniformly bulged radially outward, and the peripheral edge thereof is pressed against the inner peripheral surface of the cylindrical portion 13 as shown in FIG. Is stopped. After deburring, the pressing punch 10 rises and the core punch 20 descends. Outer burr 3 cut from base 30
3 engages the tapered surface 15 and the inner burr 34
Since both burrs are locked and held by the pressing punch 10 by being pressed against the inner peripheral surface of the base 30, the burrs are raised together with the pressing punch 10 without dropping as shown in FIG.
Is maintained on the tray 21. Thereby, the base 30 is separated from the outer burr 33 and the inner burr 34.
The receiving tray 21 and the base 30 are formed of the hydraulic cushion spring 2.
The base 30 is raised by the bias of 4, and the base 30 protrudes above the cutting blade 23, so that the base 30 can be transported.

The outer burr 3 held by the pressing punch 10
After the pressing punch 10 is moved to another position, the inner burrs 3 and the inner burr 34 are separated from the pressing punch 10 by driving an external ballistic slipper (not shown) provided on the outer periphery of the pressing punch 10 and the knockout pin 11, and Is discharged to That is, according to the deburring method and the deburring apparatus of the present embodiment, since the base 30 is stably supported with the lower surface side placed on the tray 21, troubles such as dropping do not occur. Further, the outer burr 33 and the inner burr 34 separated from the base 30 are securely locked and held by the pressing punch 10, so that they are prevented from falling. Therefore, work 3
The outer burrs 33 and the inner burrs 34 can be reliably removed from the base 3 and the base 3 separated from the outer burrs 33 and the inner burrs
0 can be stably transferred to the next step.

Since the inner burrs 34 are evenly swelled by being pressed by the four projections 15, the pressure contact with the inner peripheral surface of the cylindrical portion 13 is uniform at all four locations. Therefore, by driving the knockout pin 11, the inner burr 34 is formed.
Since the camera falls in a horizontal state without tilting, it is easy to carry after the camera falls. The above embodiments include the following technical ideas. (1) A deburring method for separating an inner burr and an outer burr from a work having an inner burr on an inner circumferential surface of an annular portion of a base and having an outer burr substantially on the entire outer circumference, wherein the burr is substantially projected on a plane. The first burr is pressed from one side by a first punch having a pressing surface having a shape, and the second burr is pressed against the inner burr in a direction opposite to the pressing direction of the first punch to remove the inner burr. A deburring step of pressing the outer burr with a cutting blade having an inner peripheral blade having a substantially outer peripheral shape of the base to remove the outer burr, and positioning the outer burr in the first punch. A burr forming step of forming the inner burr to bulge radially outward is performed, and the inner burr bulged radially outward is brought into pressure contact with the inner peripheral surface of the first punch to be locked and held. At the same time, the outer burr is locked to the outer peripheral surface of the first punch, and the inner burr and the outer burr are separated from the base. Bali vent wherein the separating the. (2) A work having an inner burr on the inner peripheral surface of the annular portion of the base and an outer burr substantially entirely on the outer periphery has a pressing surface in a substantially planar projection shape of the base and has an opening corresponding to the annular portion. A punch member, a second punch member having a centering punch that can follow the inner peripheral shape of the annular portion and can enter and leave the opening of the first punch member, and a cutting blade having an inner peripheral blade having a substantially outer peripheral shape of the base body A molding portion projecting beyond the clearance between the inner peripheral surface of the first punch member and the outer peripheral surface of the core punch on an inner peripheral surface deeper than the opening of the first punch member; The inner burr separated from the base is pressed by the forming portion and the core punch to allow the inner burr to be formed to bulge radially outward, and the outer peripheral surface of the first punch member is formed. Has a locking portion for locking and holding the outer burr, and the inner portion separated from the base. Burr vent device being characterized in that a lockable retaining the first punch member with the inner peripheral surface and the locking portion of the first punch member Li and outer burr.

[0030]

According to the deburring method and the deburring apparatus of the present invention, since the base is held by the second punch member, it does not fall, and the separated inner burrs are bulged by forming by the forming part. As a result, since the first punch member is securely locked and held, the falling is reliably prevented. Therefore, the substrate can be transported to the next step without fail, and the production line is not stopped or manual work due to dropping is unnecessary, so that productivity is remarkably improved.

Further, since the deburring step can be performed on the same line as other steps, and the inner and outer burrs can be discharged at the same time, the number of steps can be reduced and the number of steps can be greatly reduced. The number of facilities required is reduced, which is extremely effective in terms of facilities and space.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a deburring apparatus according to an embodiment of the present invention before deburring.

FIG. 2 is a cross-sectional view showing the deburring apparatus according to the embodiment of the present invention in a state where the deburring is being performed.

FIG. 3 is a cross-sectional view showing the deburring apparatus according to one embodiment of the present invention after deburring.

FIG. 4 is a sectional view of a main part of a deburring apparatus according to one embodiment of the present invention.

FIG. 5 is a plan view of a work used in one embodiment of the present invention.

[Explanation of symbols]

1: Upper punch member 2: Lower punch member 3:
Work 12: Pressing surface 15: Projection (formed part) 1
6: tapered surface (locking portion) 20: core punch 30: base 33: outer burr
34: Inner burr

Claims (2)

[Claims] 1. A deburring method for separating an inner burr from a work having an inner burr on an inner peripheral surface of an annular portion of a base, wherein the first burr is formed by a first punch having a pressing surface of a substantially planar projection shape of the base. The base is pressed from one side, and the inner burr is pressed by a second punch in a direction opposite to the pressing direction of the first punch to remove the inner burr, and the removed burr is positioned in the first punch. A punching step, and a burr forming step of forming the inner burr radially outward in the first punch, and performing the radially outwardly expanding inner burr of the first punch. A deburring method, wherein the inner burr is separated from the substrate by being brought into pressure contact with an inner peripheral surface and locked and held. 2. A first punch member having a substantially flat projected shape pressing surface of a base of a work having an inner burr on an inner peripheral surface of an annular portion of the base and having an opening corresponding to the annular portion; And a second punch member having a centering punch that can enter and exit the opening of the first punch member according to the inner peripheral shape of the first punch member. The second punch member has an inner peripheral surface deeper than the opening of the first punch member. (1) A molding portion protruding beyond the clearance between the inner peripheral surface of the punch member and the outer peripheral surface of the coring punch, and the inner burr separated from the base is pressed by the molding portion and the coring punch. A deburring device, wherein the inner burr can be formed to bulge radially outward.