JPH09150315A - Deburring device for cast product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely carry out deburring without matching the outside diameter of an insertion shaft member with the inside diameter of a hole in a cast product by arranging an insertion shaft member, in which an outside diameter sufficient to penetrate into the hole in the cast product is provided and a tapering stepped part with an outside diameter gradually reducing toward the tip is formed between a guide shaft member and the insertion shaft member. SOLUTION: Spiral shafts 80 are shrunk and retreated toward a unit plate 70 against energizing force of energizing springs 90 individually. Because of functions of spiral grooves and internal thread grooves in nut members 72, the spiral shaft 80 are rotated around their axial centers, so that tapering stepped parts 83 are brought into slide contact with the one end face side opened circumference parts in respective cast through holes H while energized by means of the energizing springs 90, so that thread chamfering is carried out in the one end face side opened circumference parts in the cast through holes H, and consequently, burrs generated in casting can be completely eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting product having a hole having an opening at one end face thereof, and a device for removing burrs generated in the hole from one end face of the casting product.

[0002]

2. Description of the Related Art For example, in a cast product such as an aluminum cast product having a cast hole, burrs are often generated in the peripheral edge of the opening of the cast hole immediately after the casting. However, it is necessary to remove this during the finishing process.

Conventionally, in the case of removing the burrs as described above, usually, a drilling machine such as a drilling machine is generally used, and a method of cutting and removing by inserting a blade tool such as a drill into a casting hole is often used. ing.

[0004]

By the way, when removing a burr generated in a hole of a cast product by applying a boring machine such as a drilling machine as described above, the outer diameter of the blade tool such as the above-mentioned drill is changed. Since it is necessary to surely match the inner diameter of the casting hole, strict processing accuracy is required, and there is a possibility that the processing operation will be significantly complicated.

[0005]

SUMMARY OF THE INVENTION The present invention is an apparatus for applying to a cast product having a hole opening at one end face thereof, and removing burrs generated in the hole from the one end face of the cast product. A portion that has a size that covers the opening of the hole in the one end surface of the cast product, and that is arranged so as to be able to move toward and away from the one end surface of the cast product and that faces the hole of the cast product A unit plate having a guide insertion hole formed therein, a female screw member arranged in the guide insertion hole of the unit plate, and an outer diameter larger than the hole of the casting, and a spiral groove is formed on the peripheral surface. A guide shaft member that is arranged to advance and retreat in a guide insertion hole of the unit plate in such a manner that the spiral groove is screwed into the female screw member, and has an outer diameter that is inserted into the hole of the cast product, and From the tip end surface of the guide shaft member to the guide shaft member A taper step portion that extends concentrically along the axis of the body, constitutes a blade tool at the tip, and gradually decreases in outer diameter toward the tip between the body and the guide shaft member. And an urging member that urges the guide shaft member toward the unit plate toward the distal end thereof, and the guide shaft member resists the urging force of the urging member. And a stopper member that comes into contact with the guide shaft member when the unit plate is contracted and moved toward the base end side by a preset distance and prevents the guide shaft member from being contracted and retracted thereafter with respect to the unit plate. .

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the drawings showing the embodiments. FIG. 5 conceptually shows a processing facility to which an embodiment of the deburring device for cast products according to the present invention is applied. As shown in FIG. 7 and FIG. 8, the processing equipment exemplified here is used for assembling a plurality of types of cast products cast by applying aluminum die casting, for example, an oil pump case W of an engine for a four-wheeled vehicle. At this time, a plurality of cast holes H which will be bolt insertion holes are temporarily subjected to burr removal processing. As shown in FIG. 5, a lower main plate 11 is arranged on the upper surface of the main table 1, and The upper main plate 12 is arranged above the lower main plate 11. In the following description, each of the plurality of types of oil pump cases W described above has a burr B at the edge of the opening on one end face side of the casting hole H immediately after casting.
Is supposed to occur.

As shown in FIGS. 1 and 2, the lower main plate 11 and the upper main plate 12 respectively have a plurality of types of oil pump cases W described above.
It has a rectangular plate shape that is sufficiently larger than the above, and secures a sufficient gap between each other by the support rods 13 arranged at the four corners of each, and extends along the horizontal direction in a mutually parallel manner. On the upper surface of the lower main plate 11, there is provided a positioning plate 20 corresponding to the model of the oil pump case W to be subjected to burr removal processing.

The positioning plate 20 has a rectangular plate shape that is smaller than the lower main plate 11 and larger than the corresponding oil pump case W, and has a shaft hole S of the oil pump case W at the center of its upper surface. The positioning pin 21 that is fitted to the
Bushing 22 is provided at a portion facing each of the cast holes H with respect to each other, and a positioning not shown is provided at a portion facing a positioning pin fitting hole (not shown) opened on the other end surface of the oil pump case W. With a knock pin, the positioning pin 21 is fitted into the shaft hole S,
In addition, when the above-described positioning knock pin (not shown) is fitted in the positioning pin fitting hole (not shown), the corresponding one end of the casting holes H faces the respective oil pumps in such a manner that one end face side opening of the casting hole H faces upward. It serves to position and hold the case W on the lower main plate 11.

Although not shown in the drawing, the positioning plate 20 described above is prepared in a plurality of types corresponding to each of the plurality of types of oil pump cases W to be subjected to deburring processing in the above processing equipment. The one corresponding to the oil pump case W to be processed previously is selected, and the pair of knock pins 14 projecting from the lower main plate 11 are fitted into the pin fitting holes 23, respectively, so that the lower main plate 11 is fitted to the lower main plate 11. On the other hand, it will be held detachably. In addition, reference numeral 15 in the drawing is a discharge hole for the machining waste formed in the lower main plate 11, and when any of the plurality of types of positioning plates 20 described above is attached to the upper surface of the lower main plate 11, It is opened at a portion facing each bush 22.

On the other hand, the processing equipment is provided with a lifting cylinder actuator 30 using air as a working fluid on the upper surface of the upper main plate 12 described above. The elevating cylinder actuator 30 extends from the insertion opening 12a formed in the central portion of the upper main plate 12 in such a manner that its operating rod 31 is directed vertically downward, and the upper surface of the upper main plate 12 is interposed via the cylinder body 32. It has a stroke larger than the above-mentioned gap between the upper main plate 12 and the lower main plate 11, and holds the stopper plate (stopper member) 40 at the lower end of the operating rod 31. ing.

The stopper plate 40 has a rectangular plate shape that is smaller than the upper main plate 12 and larger than the plurality of types of oil pump cases W described above, and the boss member 41 fixed to the center of the upper surface of the stopper plate 40 is described above. It is extended horizontally by screwing the operating rod 31 of the lifting cylinder actuator 30, and stopper rods 42 are provided at the four corners of the lower surface thereof. The stopper rods 42 have a columnar shape having the same length and extend vertically downward from the lower surface of the stopper plate 40, and hold the reference plate 50 at each lower end. There is.

As shown in FIGS. 1, 2 and 6, the reference plate 50 has a rectangular plate shape that is smaller than the upper main plate 12 and larger than the stopper plate 40, and has a central portion. In addition to having four rectangular window holes 51, guide rods 52 are provided at both ends of the window holes 51, which are located outside the stopper plate 40.

The window holes 51 are provided so as to extend in the vertical and vertical directions, and the corresponding positioning plate 2 is irrespective of the model of the oil pump case W to be subjected to deburring processing.
When the oil pump case W is positioned and held by the lower main plate 11 via 0, the oil pump case W is always provided at a position facing the respective casting holes H.

The guide rod 52, as shown in FIGS. 1, 2, 5 and 6, has a cylindrical shape having a length equal to or longer than the stroke of the lifting cylinder actuator 30. Extending vertically upward from the reference plate 50, each upper end portion is slidably fitted inside the guide bush 16 attached to the upper main plate 12.

As shown in FIGS. 1 and 2, the reference plate 50 has a pusher 60 on its lower surface. The pusher 60 is a push bolt 61 screwed to the reference plate 50 in a manner extending vertically downward.
A push member 62 slidably inserted in the shaft portion of the push bolt 61, and a pressing member 62 interposed between the push member 62 and the reference plate 50 in such a manner that the push member 62 is always pressed downward. The oil pump case W is configured to include the spring 63, and the oil pump case W is positioned and held by the lower main plate 11 via the corresponding positioning plate 20 regardless of the model of the oil pump case W to be subjected to the burr removal processing. In this case, they are always arranged at positions facing the respective upper surfaces.

Further, the reference plate 50 holds, on its lower surface, a unit plate 70 corresponding to the model of the oil pump case W to be subjected to burr removal processing.

The unit plate 70 is in the form of a rectangular plate slightly larger than the corresponding oil pump case W, and guide insertion holes 71 are formed at the portions of the oil pump case W facing the respective cast holes H. Have The guide insertion holes 71 are configured such that their respective lower ends have an inner diameter larger than the facing casting holes H, and their respective upper ends have an inner diameter larger than their respective lower ends. The shaft center is penetrated along the vertical vertical direction in a manner to match the shaft center extension line with the facing cast hole H, and the nut member (female screw member) 72 is held at each lower end opening. Together with the spiral axis 80 inside each
Is housed.

The nut member 72 has a central hole 72a at the center thereof, which has a diameter slightly smaller than the lower end of the guide insertion hole 71 formed in the unit plate 70 and a diameter larger than the facing casting hole H. , Which has a cylindrical shape having a mounting flange 72b on the outer peripheral surface of the base end portion, and is further engraved with multiple threads, for example, seven internal thread grooves (not shown), on the inner peripheral surface of each central hole 72a, The center holes 72a are attached to the lower surface of the unit plate 70 via the attachment flanges 72b in a state where the axis of the center holes 72a are aligned with the axis of the guide insertion holes 71.

As clearly shown in FIGS. 3 and 4, the spiral shaft 80 has a cylindrical shape having an outer diameter that fits into the central hole 72a of the nut member 72, and the nut is provided on the outer peripheral surface of the tip end portion. A guide shaft portion (guide shaft member) 8 in which seven spiral grooves 81a that can be screwed into an internal thread groove (not shown) of the member 72 are engraved.
1 and a flange portion 82 which is arranged substantially at an intermediate portion of the guide shaft portion 81 and has a diameter slightly smaller than the upper end portion of the guide insertion hole 71, and a taper step whose outer diameter gradually decreases toward the tip. Insertion shaft portion that is concentrically continuous from the tip of the guide shaft portion 81 through the portion 83 and has a columnar shape having a smaller diameter than the facing casting hole H, and that has a blade tool 84 as described below at the tip portion. (Insert shaft member) 85 is integrally formed, and as shown in FIG. 1, the blade tool 84 of the insertion shaft portion 85 is directed vertically downward through the window hole 51 of the reference plate 50. The guide shaft portion 81 is inserted into the guide insertion hole 71 of the unit plate 70, the spiral groove 81a of the guide shaft portion 81 is screwed into the female screw groove (not shown) of the nut member 72, and the stopper plate 40 Underside and frame By interposing an urging spring (urging member) 90 between the unit portion 70 and the ridge portion 82, the unit plate 70 can be moved back and forth, and in the normal state, the unit plate 70 is in the most protruding state from the lower surface thereof. Is held.

At this time, as is apparent from FIG. 1, in the spiral shaft 80, the protrusion amount T from the lower end surface of the nut member 72 is determined by the base end surface of the guide shaft portion 81 and the lower surface of the stopper plate 40. It is set larger than the distance L between them.

Further, the spiral groove 81a of the spiral shaft 80 and the internal thread groove (not shown) of the nut member 72 are such that when the spiral shaft 80 is pressed in the axial direction, the spiral shaft 80 rotates about its axial center. 0.2-0.3mm so that it can be easily rotated
They are screwed together with some clearance.

Further, the spiral shaft 80 applied in this embodiment.
As shown in FIG. 4, the blade tool 84 of No. 1 processes each of the cutting edges α into a 90 ° conical shape, then performs an angle β of 30 ° for each conical section with four blades, and thereafter, Quenching, tempering, and oil quenching on the slopes
A material having a hardness of RC50 ± ³ is applied. In addition,
The cutting edge portion and the taper step portion 83 are each ground and finished.

Although not shown in the drawing, the unit plate 70 described above is provided with a plurality of types corresponding to each of the plurality of types of oil pump cases W to be subjected to deburring processing in the processing equipment. The one corresponding to the oil pump case W to be processed previously is selected, and the pair of knock pins 53 protruding from the reference plate 50 are fitted into the pin fitting holes 73, respectively, and further tightened as shown in FIG. By fastening the bolt 54 to the reference plate 50 from below, the bolt 54 is detachably held with respect to the reference plate 50.

When deburring the cast hole H of the oil pump case W by the processing equipment constructed as described above, first, the positioning corresponding to the model of the oil pump case W to be processed as described above is performed. The plate 20 and the unit plate 70 are respectively selected, and the work for attaching the selected positioning plate 20 and the unit plate 70 to the lower main plate 11 and the upper main plate 12 is performed in a state where the lifting cylinder actuator 30 is most retracted. .

After the positioning plate 20 and the unit plate 70 have been attached, when a start switch (not shown) is turned on, the conveyor 2 provided on the front side of the main table 1 is driven and the oil pump case W immediately after casting is formed. Will be sequentially loaded into the processing equipment.

The oil pump case W carried into the processing equipment is transferred from the conveyor 2 by any means not shown, and as shown in FIG. 1, its shaft hole S and positioning pin fitting hole ( By fitting the positioning pin 21 and the positioning knock pin to (not shown) respectively, the lower main plate 11 is positioned and held via the positioning plate 20.

The positioning pin 2 is provided in the shaft hole S and the positioning pin fitting hole (not shown) of the oil pump case W, respectively.
1 and the positioning knock pin are confirmed to be fitted, the lifting cylinder actuator 30 is extended,
The guide rod 52 slides in the guide bush 16 to move the reference plate 50 downward via the stopper plate 40 and the stopper rod 42, and the unit plate 70 held by the reference plate 50.
Will move closer to the oil pump case W, and the insertion shaft portions 85 of the spiral shaft 80 housed in the unit plate 70 will be inserted into the inside through the openings on the one end face side of the facing casting holes H, respectively. As a result, the tapered step portion 83 comes into contact with the peripheral edge portion of the one end surface side of the cast hole H.

Here, when the resistance of the burr B generated at the peripheral edge of the opening on the one end surface side of the casting hole H is less than the biasing force of the biasing spring 90, the burr B is punched by the biasing force. The insertion shaft portion 85 of the spiral shaft 80 is inserted into the casting hole H with the insertion shaft portion 85 as it is.

On the other hand, when the resistance due to the burr B generated at the peripheral edge of the opening on the one end face side of the casting hole H is larger than the biasing force of the biasing spring 90, the biasing force of the biasing spring 90 is resisted. As a result, the spiral shaft 80 contracts and moves with respect to the unit plate 70. At that time, the spiral shaft 80 is
The spiral groove 81a engraved on the guide shaft portion 81 has the nut member 7
Since it is screwed into the female screw groove (not shown) of No. 2, it rotates about its axis along with the retracting movement, and the blade tool 84 formed at the tip of the insertion shaft 85 has the burr B described above. The insert shaft portion 85 is inserted into the cast hole H while cutting the burr B.

Further, when the insertion shaft portion 85 cannot be inserted into the casting hole H by the cutting action of the blade tool 84 described above, the guide shaft portion of the spiral shaft 80 is moved by the subsequent proximity movement of the unit plate 70. Since the base end surface of 81 contacts the lower surface of the stopper plate 40, the pressing force due to the extension operation of the lifting cylinder actuator 30 directly acts on the spiral shaft 80 via the stopper plate 40, and the burr B of the cast hole H is formed. Will be punched out.

During these operations, the individual spiral axes 80 are
Since they are biased by the respective biasing springs 90 which are independent of each other, each of them is independently retracted relative to the unit plate 70.

Further, since the spiral shaft 80 is screwed into the female screw groove (not shown) of the nut member 72 while ensuring the clearance as described above, the spiral shaft 80 can be inserted into the cast hole H of the oil pump case W. Even if there is some misalignment,
The insertion shaft portion 85 is surely inserted into the casting hole H by appropriately tilting along the casting hole H.

If the casting hole H is defective or abnormal, the insertion shaft portion 85 of the spiral shaft 80 cannot be inserted into the casting hole H, so that a stroke load larger than a preset value is applied. Therefore, it is possible to confirm that there is an abnormality in the oil pump case W by detecting this load, and take appropriate measures.

The tapered step portion 83 of the spiral shaft 80 is the cast hole H.
When the unit plate 70 further moves closer to the oil pump case W while being in contact with the peripheral edge of the opening on the one end face side, the spiral shaft 80 resists the biasing force of the biasing spring 90.
Respectively reciprocate with respect to the unit plate 70, and the spiral shaft 80 causes the spiral groove 81a and the nut member 72 to move.
Since each of the tapered step portions 83 is urged by the urging spring 90 by the action of the female screw groove (not shown), the one end face side opening peripheral edge portion of each casting hole H is urged by the urging spring 90. As a result, the chamfering is applied to the peripheral edge portion of the opening on the one end surface side of the casting hole H, and the burr B generated during the casting is completely removed.

When the preset time elapses from the above-mentioned state, the unit cylinder 70 is moved away from the oil pump case W by the retracting operation of the lifting cylinder actuator 30, and each spiral shaft 80 is pulled out from the casting hole H. Therefore, the oil pump case W for which the burr removal processing has been completed for the positioning plate 20 and the new unprocessed oil pump case W on the transport conveyor 2 can be replaced.

By repeating the above-mentioned operation, the casting hole H of the oil pump case W is sequentially subjected to deburring processing.

When changing the model of the oil pump case W, the positioning plate 20 and the unit plate 70 attached to the lower main plate 11 and the upper main plate 12 are attached to the oil pump case W.
The above-mentioned operation may be performed by exchanging with the one corresponding to.

As described above, according to the processing equipment, the insertion shaft portion 85 of the spiral shaft 80 is inserted into the casting hole H of the oil pump case W, and then the one end face side opening peripheral edge portion of the casting hole H is inserted. Since the tapered step portion 83 is slidably contacted with the burrs, the burrs can be surely removed without matching the outer diameter of the insertion shaft portion 85 with the inner diameter of the casting hole H, so that strict machining accuracy can be obtained. It is not required, and it becomes possible to prevent the processing work from becoming extremely complicated.

Moreover, since the spiral shafts 80 are respectively arranged at the portions of the unit plate 70 facing the cast holes H of the oil pump case W, a large number of cast holes H can be deburred at one time. Therefore, it is possible to shorten the processing time and prevent forgetting the processing.

In the above-described embodiment, an example is shown in which the deburring process is performed on the cast hole of the oil pump case formed by applying aluminum die casting, but the present invention is not limited to this. It can also be applied to cast products.

Further, in the above-mentioned embodiment, the guide shaft member and the insertion shaft member are arranged at each of the portions of the unit plate that face the hole of the casting, but the guide shaft member and the insertion shaft member are not necessarily required. It is not necessary to provide a plurality of holes corresponding to the holes of the cast product. When a plurality of guide shaft members and insertion shaft members are provided, the respective outer diameters do not necessarily have to be the same, and needless to say, the outer diameters may be formed according to the inner diameters of the facing holes. .

Furthermore, in the above-described embodiment, the nut member is arranged at one end opening of the guide insertion hole formed in the unit plate, but at the inside of the guide insertion hole and the other end opening of the guide insertion hole. Even when a nut member is provided, the same effect can be expected.

[0043]

As described above, according to the present invention,
After inserting the insertion shaft member into the hole of the cast product, the taper step is slidably contacted to the opening peripheral edge of the one end face side of the hole. Since the burr can be surely removed without conforming to the inner diameter, strict machining accuracy is not required, and it is possible to prevent the machining work from being significantly complicated.

[Brief description of the drawings]

FIG. 1 is a sectional front view conceptually showing one embodiment of a deburring device for cast products according to the present invention.

2 is a sectional front view showing a state during processing in the deburring device for a cast product shown in FIG. 1. FIG.

3 is an enlarged side view conceptually showing a guide shaft member and an insertion shaft member applied to the deburring device for a cast product shown in FIG.

4A and 4B conceptually show the main part of the deburring device for cast products shown in FIG. 1, in which FIG. 4A is an enlarged cross-sectional view showing a state immediately before processing, and FIG. It is an expanded sectional view showing.

5 is a side view conceptually showing a processing facility to which the deburring device for a cast product shown in FIG. 1 is applied.

6 is a sectional view taken along line VI-VI in FIG.

7 is a side view conceptually showing a cast product to be processed by the deburring device shown in FIG.

8 is a perspective view conceptually showing a cast product to be processed by the deburring device shown in FIG.

[Explanation of symbols]

 40 ... Stopper plate 70 ... Unit plate 71 ... Guide insertion hole 72 ... Nut member 80 ... Spiral shaft 81 ... Guide shaft portion 81a ... Spiral groove 83 ... Tapered step portion 84 ... Blade tool 85 ... Insertion shaft portion 90 ... Energizing spring B … Burr H… Casting hole W… Oil pump case

Claims (1)

[Claims] 1. A device for applying to a cast product having a hole opening at one end face thereof to remove burrs generated in the hole from the one end face of the cast product, the device comprising: A unit having a size that covers the opening of the hole and arranged so as to be able to move toward and away from the one end surface of the cast product, and a guide insertion hole is formed in a portion facing the hole of the cast product. A plate, a female screw member arranged in the guide insertion hole of the unit plate, and an outer diameter larger than the hole of the casting, and a spiral groove is formed on the peripheral surface, and the spiral groove is A guide shaft member that is arranged to be able to advance and retreat in a guide insertion hole of the unit plate in a manner of being screwed into a female screw member; and an outer diameter that is inserted into the hole of the cast product, and from the tip surface of the guide shaft member. Along with the shaft center integrally with the guide shaft member An insertion shaft member that extends to the center and that constitutes a blade tool at the tip end portion, and that forms a taper step portion whose outer diameter gradually decreases toward the tip end between the guide shaft member and the guide shaft member, A biasing member that biases the guide shaft member toward the tip of the unit plate, and a preset distance with respect to the unit plate that resists the biasing force of the biasing member. A cast member having a stopper member that abuts on the guide shaft member only when the guide shaft member is contracted and moved to the base end side and prevents the guide shaft member from contracting and moving thereafter relative to the unit plate. Removal device.