JP5598186B2 - Foreign matter removal method and foreign matter removal device - Google Patents

Description

  The present invention relates to a foreign matter removing method for removing foreign matter remaining in a cavity communicating with a hole by discharging the foreign matter into the hole from the hollow portion and the foreign matter removing apparatus. Specifically, for example, in a workpiece that is a casting, a foreign matter removing method that removes foreign matter such as burrs that have entered the casting cavity communicating with the hole at the inner peripheral wall of a small diameter and deep hole by discharging from the casting cavity, And a foreign matter removing apparatus thereof.

  An engine block of an automobile is formed by casting such as die casting, and a small-diameter and deep hole (hereinafter, simply referred to as “small-diameter deep hole”) formed after casting as an oil passage of the engine block. Perforated by machining. In casting, the cast hole is generated at random positions, and the cast hole formed near the wall surface of the small diameter deep hole may communicate with the inner peripheral wall of the small diameter deep hole inside the engine block after molding. During the processing of small diameter deep holes, burrs are generated at this communicating portion. The burrs are removed in the deburring process, but a part of the removed burrs may remain as foreign matter in the cavity in the casting cavity. If foreign matter remaining in the cavity in such a casting hole is mixed with oil in the oil passage, a problem occurs in the engine.

Conventionally, there is a core sand removal method disclosed in Patent Document 1 as one method of removing foreign matter remaining in a cavity in a hole of a workpiece, such as the cavity. In FIG. 14, the figure explaining the removal method of the core sand which concerns on patent document 1 is shown.
As shown in FIG. 14, Patent Document 1 applies the projection material 391 ejected from the ejection nozzle 390 to the change surface 311 of the hard rod-shaped member 310 to change the ejection direction of the projection material 391, and the projection material 391 is replaced with a workpiece 380. The core sand is removed by causing the core sand to collide against the core sand adhering to the recess 383 of the hollow portion 380H.

  FIG. 15 is a diagram for explaining a method of removing the foreign matter remaining in the cavity in the prior art. As a conventional technique different from Patent Document 1, the present applicant, as shown in FIG. 15, injects a fluid FL such as air or running water from the inlet of the small diameter deep hole 481H through the nozzle 490 toward the back of the hole. Then, the fluid FL is allowed to flow into the small diameter deep hole 481H, or the flowing water is flowed toward the small diameter deep hole 481H at a position away from the inlet of the small diameter deep hole 481H. In addition, the engine block was submerged in the water tank, and the water flow generated in the water tank was sent into the small-diameter deep hole, and the foreign matter remaining in the cavity was tried to be discharged from the cavity by the force of the water flow.

Japanese Patent Laid-Open No. 10-166137

However, the prior art has the following problems.
Even if the removal method described in Patent Document 1 is used to remove foreign matter from the cast hole communicating with the small-diameter deep hole of the engine block, the position of the cast hole cannot be specified. Thus, the position where the change surface 311 of the hard rod-shaped member 310 is arranged is not determined. Therefore, the foreign material in the cast hole cannot be removed by the projection material 391 whose injection direction has been changed.
In addition, when air or flowing water is sprayed from the entrance of the small diameter deep hole toward the back of the hole, or when the water flow is sent into the small diameter deep hole of the submerged engine block, it adheres to the inner wall surface of the small diameter deep hole. The removed foreign matter can be removed. However, as shown in FIG. 15, the air, flowing water, and water flow cannot flow into the cavity 483 of the cast hole from the small-diameter deep hole 481H well, and foreign matter 484 remaining in the cavity 483 is caused by air, flowing water, and water flow. There is a problem that it is difficult to discharge from the hollow portion 483 and take it out of the small-diameter deep hole 481H.

  The present invention has been made to solve the above-described problems, and includes a foreign matter removing method and a foreign matter removing apparatus capable of removing foreign matter remaining in a cavity communicating with a hole by discharging the cavity from the cavity. The purpose is to provide.

In order to solve the above problems, the foreign matter removing method of the present invention has the following configuration.
(1) In the foreign matter removing method for removing the foreign matter remaining in the hollow portion communicating with the hole by discharging from the hollow portion to the hole at the inner peripheral wall of the drilled hole, the size is slidable on the inner peripheral wall of the hole. A rod-like fluid rectifying member having a rectifying portion having an outer peripheral end formed at the tip is inserted into the hole, and a fluid is supplied toward the rectifying portion, and a cavity is moved while moving the fluid rectifying member. A second step of changing the flow of the fluid toward the cavity by the rectifying unit at a position where the portion exists and flowing the fluid into the cavity, and in the second step, while detecting the pressure of the fluid, The fluid rectifying member is inserted into the hole at a constant speed at a constant speed, and when the fluid pressure decreases, the movement of the fluid rectifying member is decelerated or stopped .

The foreign matter removing apparatus of the present invention has the following configuration.
( 2 ) In the foreign matter removing apparatus for removing the foreign matter remaining in the hollow portion communicating with the hole at the inner peripheral wall of the bored hole by discharging the hollow portion to the hole, fluid supply means for supplying fluid to the hole; A fluid having a rectifying portion having an outer peripheral end portion sized to slide on the inner peripheral wall of the hole and a rod portion connected to the rectifying portion and having a diameter smaller than that of the rectifying portion. The rectifier and the rod part are moved forward or backward in the axial direction to move the rectifier inserted in the hole to change the position of the rectifier in the hole, and the fluid pressure is measured. And a rectifying unit control unit that controls the rectifying unit moving unit based on the pressure of the fluid measured by the pressure measuring unit .
( 3 ) In the foreign matter removing apparatus described in ( 2 ), the rectifying unit has an outer peripheral end formed in a size slidable on the inner peripheral wall of the hole, and the rod portion is a solid rod shape The rectifying unit is connected to the rectifying unit at the radial center of the rectifying unit.
( 4 ) In the foreign matter removing apparatus described in ( 2 ), the rod portion is formed in a pipe shape and has a rod hollow portion serving as a fluid flow path in the diameter, and the rectifying portion slides on the inner peripheral wall of the hole. The rod hollow portion has an outer peripheral end portion formed in a movable size, and has at least one rectifying discharge portion penetrating the rectifying portion toward the inner peripheral wall of the hole with respect to the radial direction of the rectifying portion. And the rectifying and discharging part are in communication with each other.

The operation and effect of the foreign matter removal method of the present invention having the above configuration and the foreign matter removal method of the present invention will be described.
In the foreign matter removing method of the present invention,
(1) In the foreign matter removing method for removing the foreign matter remaining in the hollow portion communicating with the hole by discharging from the hollow portion to the hole at the inner peripheral wall of the drilled hole, the size is slidable on the inner peripheral wall of the hole. A rod-like fluid rectifying member having a rectifying portion having an outer peripheral end formed at the tip is inserted into the hole, and a fluid is supplied toward the rectifying portion, and a cavity is moved while moving the fluid rectifying member. And the second step of changing the flow of the fluid toward the cavity by the rectifying unit at the position where the portion is present and allowing the fluid to flow into the cavity, so that when the fluid supplied in the first step flows through the hole The foreign material adhering to the inner peripheral wall of the hole can be removed by the flow of the fluid. Further, in the second step, the fluid flowing through the hole flows into the cavity, so that the foreign matter remaining in the cavity can be discharged from the cavity to the back channel of the hole and removed.

  That is, as an example of a product having a hollow portion communicating with a hole, there is an automobile engine block formed by casting. In the engine block, a small-diameter and deep hole (hereinafter simply referred to as a “small-diameter deep hole”) formed after casting is drilled by machining as the oil passage. In casting, the cast hole is generated at random positions, and the cast hole formed near the wall surface of the small diameter deep hole may communicate with the inner peripheral wall of the small diameter deep hole inside the engine block after molding. During the processing of small diameter deep holes, burrs are generated at this communicating portion. The burrs are removed in the deburring process, but a part of the burrs removed as the foreign matter of the present invention may remain in the casting cavity which is the hollow portion of the present invention.

In the foreign matter removing method of the present invention, the foreign matter (the illustrated burr) attached to the inner peripheral wall of the hole can be removed by the fluid flow in the first step.
Further, in the second step, the thickness of the rectifying portion with respect to the direction along the axial direction of the hole is such that the hollow portion (as illustrated, a cast hole communicating with the hole at the inner peripheral wall of the hole) is opened on the inner peripheral wall of the hole. If the opening is formed to be smaller than the opening distance in the axial direction of the hole, when the rectifying unit reaches the position where the cavity is present, the inlet side channel and the back side of the rectifying unit are formed in the hole. A certain back side flow path communicates via the hollow portion with the rectifying portion interposed therebetween.
While the rectifying unit moves along the inner peripheral wall of the hole, the fluid supplied toward the rectifying unit through a nozzle or the like is injected into the hole with a predetermined pressure and hits the rectifying unit, changing the flow direction. It flows into the cavity through this inlet side channel. At this time, the inlet-side flow path has a narrow gap between the inner peripheral wall and the rectifying unit with respect to the axial direction of the hole, and the flow of the fluid becomes a rate-determining step, and the fluid is decelerated. This fluid temporarily becomes a high pressure in the rectifying unit and flows along the inner peripheral wall of the cavity. As a result, the foreign matter remaining in the cavity can be discharged and removed from the cavity to the back channel of the hole by the fluid that has flowed into the cavity and increased in pressure. The foreign matter removed from the cavity is discharged outside the hole by a known method.
Therefore, according to the foreign matter removing method of the present invention, there is an excellent effect that the foreign matter remaining in the hollow portion communicating with the hole can be discharged and removed from the hollow portion.

The hollow portion is a space partially extending from the inner peripheral wall of the hole to the outer diameter of the hole at a position formed in the middle of the hole deeper than the hole entrance with respect to the depth direction of the hole. Yes, for example, if a product having holes is formed by casting, a cast hole generated in the product may be used.
In addition, as a hollow portion such as a cast hole, for example, the opening portion in the inner peripheral wall of the hole is relatively small, but is formed in a shape that swells in a dome shape from the opening portion on the back side from the inner peripheral wall of the hole. In some cases, the opening distance may be, for example, an opening having an opening of up to about 10 mm. On the other hand, the thickness of the rectifying unit described above is smaller than the opening distance, for example, a rectifying unit having a thickness of about 5 mm or less.

In addition, as foreign matters, for example, burrs generated when holes are drilled in the engine block by machining, processing oil when this product is processed in the manufacturing stage of the product having holes, or adhesion when this product is washed When the product is used as a product, it remains in the holes or cavities, thereby hindering the use of the product.
In addition, the size of the foreign matter is smaller than the size of the opening of the hollow portion described above, and is physically large enough to enter the hollow portion from the opening portion. The part where the dimension becomes the longest is, for example, a foreign matter having a size of about 1 mm or 2 mm.
Examples of the fluid include a gas such as air and gas discharged at a predetermined pressure, a water flow, a liquid cleaning agent, and the like.

Further, in the second step, while detecting the fluid pressure, the fluid rectifying member is inserted into the hole at a constant speed at a constant speed, and when the fluid pressure decreases, the movement of the fluid rectifying member is decelerated or stopped. Even if it is difficult for the operator to confirm the position of the cavity from the outside of the hole, the operator should confirm the position of the cavity connected to the hole outside the hole with high accuracy. Thus, the foreign matter remaining in the cavity can be discharged and removed from the cavity more reliably.

That is, if the fluid is supplied to the hole in the first step while the fluid rectifying member is inserted at a constant speed, the rectifying portion at the tip of the fluid rectifying member has a size corresponding to the diameter of the hole. The flow of the fluid toward the inner side of the hole is blocked by the rectifying unit, and the pressure of the fluid is maintained at a high pressure when supplied to the hole.
On the other hand, when the rectifying unit reaches the position where the cavity is present, the inlet side channel of the hole and the inner side channel of the hole on the back side of the rectifying unit sandwich the rectifying unit, and the inner side of the hole It communicates through a cavity that communicates with the hole at the peripheral wall. As a result, the pressure of the fluid temporarily decreases while the inlet-side flow path and the back-side flow path of the hole communicate with each other, so even if the fluid rectifying member is inserted at a constant speed, The position can be detected by a change in fluid pressure.
Therefore, if the movement of the fluid rectifying member is decelerated or stopped at the position where the cavity is detected, the fluid supplied to the inlet-side flow path of the hole surely flows into the cavity, and the remaining foreign matter is more reliably removed. It can be discharged and removed from this cavity.

In the foreign matter removing apparatus of the present invention,
( 2 ) In the foreign matter removing apparatus for removing the foreign matter remaining in the hollow portion communicating with the hole at the inner peripheral wall of the bored hole by discharging the hollow portion to the hole, fluid supply means for supplying fluid to the hole; A fluid having a rectifying portion having an outer peripheral end portion sized to slide on the inner peripheral wall of the hole and a rod portion connected to the rectifying portion and having a diameter smaller than that of the rectifying portion. Since the straightening means and the straightening part moving means for moving the straightening part inserted into the hole to change the position of the straightening part in the hole by moving the rod part forward or backward in its axial direction are provided. When the position of the rectifying unit is changed in the hole by the rectifying unit moving unit while the fluid is supplied to the hole by the fluid supplying unit and the fluid flowing in the hole is applied to the rectifying unit, the rectifying unit at the tip of the fluid rectifying unit However, it reaches the position where the cavity exists. Occasionally, per the fluid rectifying unit, it flows into the cavity by changing the flow direction. The fluid that has flowed into the hollow portion once flows through the hollow portion and again flows in the hole. At this time, the foreign matter remaining in the hollow portion can be discharged and removed from the hollow portion by the flow of the fluid.

That is, if the thickness in the direction along the axial direction of the hole in the rectifying portion is formed to be smaller than the opening distance in the axial direction of the hole at the opening portion opened in the inner peripheral wall of the hole, the tip of the fluid rectifying means When the rectifying unit located at a position near the position where the cavity exists, the rectifying unit is sandwiched, and the inlet-side flow path of the hole and the deep-side flow path of the hole located behind the rectifying part are Communicate via
While the rectifying unit moves along the inner peripheral wall of the hole, the fluid supplied toward the rectifying unit through a nozzle or the like is injected into the hole with a predetermined pressure and hits the rectifying unit, changing the flow direction. It flows into the cavity through this inlet side channel. At this time, the inlet-side flow path has a narrow gap between the inner peripheral wall and the rectifying unit with respect to the axial direction of the hole, and the flow of the fluid becomes a rate-determining step, and the fluid is decelerated. This fluid temporarily becomes a high pressure in the rectifying unit and flows along the inner peripheral wall of the cavity. As a result, the foreign matter remaining in the cavity can be discharged and removed from the cavity to the back channel of the hole by the high-pressure fluid flowing into the cavity. The foreign matter removed from the cavity is discharged out of the hole by a well-known method in addition to fluid discharge by the fluid supply means.

In addition, even when the cavity communicating with the hole is scattered at multiple locations on the inner wall of the same hole, the rod part is moved forward or backward in the axial direction by the rectifying part moving means, and the position of the rectifying part is changed within the hole. By doing so, the foreign matters remaining in the respective cavities can be removed.
Of course, foreign matter adhering to the inner peripheral wall of the hole can also be removed by the fluid supplied into the hole while the rectifying part is moved by moving the rod part forward or backward in the axial direction.

Further, since the pressure measuring means for measuring the pressure of the fluid and the rectifying part control means for controlling the rectifying part moving means based on the pressure of the fluid measured by the pressure measuring means, the rectification of the fluid rectifying means is provided. It is possible to allow the fluid to flow into the cavity by appropriately arranging the part where the cavity exists.
That is, since the rectifying unit has a size corresponding to the diameter of the hole, when the fluid is supplied to the hole by the fluid supply unit, the flow of the fluid toward the back side of the hole is blocked by the rectifying unit, Is maintained at a high pressure when being supplied to the hole. On the other hand, the rectifying unit reaches the position where the hollow portion exists, sandwiches the rectifying unit, and the inlet-side flow path of the hole and the deep-side flow path of the hole on the back side of the rectifying part are When communicating with the inner peripheral wall via the cavity communicating with the hole, the pressure of the fluid temporarily decreases while the inlet-side channel and the back-side channel of the hole are in communication. At this time, the rectifying unit control unit controls the rectifying unit moving unit based on the pressure value measured by the pressure measuring unit, and decelerates or stops the moving speed of the rectifying unit of the fluid rectifying unit, thereby A rectifying unit is disposed at a position where the road and the back side flow path communicate with each other. Thereby, the fluid can surely flow into the cavity.

( 3 ) The rectifying unit has an outer peripheral end formed in a size slidable on the inner peripheral wall of the hole, and the rod part is a solid rod, and the rectifying unit is located at the radial center of the rectifying unit. In the hole, the fluid flow path is formed between the rod part and the inner peripheral wall of the hole, and the fluid supplied by the fluid supply means is located behind the hole beyond the rectifying part. It hardly flows from the outer peripheral end portion and easily flows into the hollow portion from the inner peripheral wall of the hole. Further, by using the space of the hole on the back side from the rectifying unit, foreign matter from the cavity part can be discharged to the outside of the hole along the rectifying unit together with the flow of the fluid.
The relationship between the diameter of the hole and the diameter of the rod part is such that the distance in the radial direction between the outer peripheral surface of the rod part and the inner peripheral wall of the hole is that of the part where the dimension is the longest in the foreign matter remaining in the cavity. It is necessary to set the diameter of the rod portion corresponding to the diameter of the hole so as to be larger than the size.

( 4 ) The rod portion is formed in a pipe shape, and has a rod hollow portion serving as a fluid flow path in the diameter, and the rectifying portion is an outer peripheral end formed to be slidable on the inner peripheral wall of the hole. And having at least one rectifying and discharging part penetrating the rectifying part toward the inner peripheral wall of the hole with respect to the radial direction of the rectifying part, and the rod hollow part and the rectifying and discharging part communicate with each other The fluid supplied by the fluid supply means flows through the rod hollow portion of the rod portion, is discharged toward the inner peripheral wall of the hole through the rectifying discharge portion of the rectifying portion, flows into the hollow portion, and becomes foreign matter remaining in the hollow portion. By intensively hitting, it becomes easier to remove foreign matters more reliably.

That is, when fluid flows from the rectifying and discharging part through the rod hollow part, in the rectifying part with the rectifying and discharging part, the outer peripheral end part on the inlet side of the hole and the back side of the hole with the rectifying and discharging part interposed therebetween Fluid rectification can be performed using two outer peripheral ends with a certain outer peripheral end.
For example, when the cavity is a casting hole, as described above, the opening of the casting hole in the inner peripheral wall of the hole is relatively small, but exists in a shape swelled from the opening at the back side of the inner peripheral wall of the hole. Sometimes. In such a case, if foreign matter remains in the dome-shaped cavity that swells in a dome shape behind the opening and remains on the entrance side or the back side of the hole, depending on the position where it remains in the dome-shaped cavity, the cavity It may also be difficult to remove the fluid simply by flowing it into the section.

In the foreign matter removing apparatus of the present invention, the fluid flows into the dome-shaped cavity along the outer peripheral end of the rectifying part on the inlet side of the hole, and toward the inlet side of the hole along the inner peripheral shape of the cavity. In the cavity, the foreign matter remaining at the position behind the hole in the cavity is easily ejected from the cavity due to the fluid flow that is decelerated at the time of inflow into the cavity. Become.
On the other hand, when the fluid flows into the dome-shaped cavity along the outer peripheral end of the rectifying unit on the back side of the hole and flows toward the back of the hole along the inner peripheral shape of the cavity, In the cavity, the foreign matter remaining at the position on the inlet side of the hole is jetted to a high pressure as the fluid flow decelerated at the time of inflow into the cavity, and is easily discharged from the cavity by the flow of fluid.
The foreign matter discharged from the hollow portion is discharged into the space between the rod portion and the inner peripheral wall of the hole or the hole on the back side from the rectifying portion.

In addition, the fluid flow path can be separated into the rod hollow portion, and the discharge path of the foreign matter discharged from the cavity portion can be separated into the space between the rod portion and the inner peripheral wall of the hole. When flowing into the liquid, the foreign matter discharged from the cavity portion is not mixed with the fluid, and the foreign matter does not enter the cavity portion again.
In the relationship between the diameter of the hole and the diameter of the hollow portion of the rod, the radial distance between the outer peripheral surface of the rod portion and the inner peripheral wall of the hole is the longest in the shape of the foreign matter remaining in the cavity. It is necessary to set the diameter of the hollow portion of the rod so as to correspond to the diameter of the hole so as to be larger than the size of the portion.

It is process drawing explaining the foreign material removal method which concerns on Embodiment 1. FIG. FIG. 2 is a process diagram illustrating the foreign matter removing method according to Embodiment 1 following FIG. 1. FIG. 3 is a process diagram illustrating the foreign matter removing method according to the first embodiment, following FIG. 2. FIG. 4 is a process diagram illustrating the foreign matter removing method according to Embodiment 1 following FIG. 3. FIG. 5 is a process diagram illustrating the foreign matter removing method according to Embodiment 1 following FIG. 4. FIG. 6 is a process diagram for explaining the foreign matter removing method according to the first embodiment, following FIG. 5. It is a figure which shows the fluid rectification | straightening member used for the foreign material removal apparatus which concerns on Embodiment 1. FIG. It is a figure explaining the foreign material removal apparatus which concerns on Embodiment 2, (a) is explanatory drawing which shows a mode that a burr | flash is removed, (b) is a graph which shows the relationship between the position of a rectification | straightening part, and an air pressure. It is a figure which shows the fluid rectification member used for the foreign material removal apparatus which concerns on Embodiment 3. FIG. It is a figure explaining the foreign material removal apparatus which concerns on Embodiment 3. FIG. In FIG. 10, it is explanatory drawing which expands and shows a principal part. In FIG. 10, it is explanatory drawing which expands and shows the principal part in a position different from FIG. It is a figure explaining the foreign material removal apparatus which concerns on Embodiment 4. FIG. It is a figure explaining the removal method of the core sand disclosed by patent document 1. FIG. It is explanatory drawing of the method of removing the foreign material which remained in the cavity part in the prior art.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment embodying a foreign matter removing method and a device foreign matter removing apparatus according to the present invention will be described in detail in Embodiments 1 to 4 with reference to the drawings.
In the first to fourth embodiments, the product having holes according to the present invention is, for example, an automobile engine block formed by casting such as die casting, and a hollow formed in a random position inside the engine block. There is. The hole is a hole serving as an oil passage for lubricating oil flowing between the crank journal portion and the main oil hole or cooling oil for the piston in the engine. This hole is, for example, an inner diameter of about 6 mm, an oil passage length (depth) of about 100 mm, etc., and a hole having a relatively small depth while being small in diameter, and is drilled by machining after casting. It is formed. When the hole is drilled, the inner peripheral wall of the hole may communicate with the cast hole, and the cast hole that is generated near the inner peripheral wall surface of the hole and penetrates the inner peripheral wall of the hole communicates with the cavity portion of the present invention. Corresponding to When the hole is processed, burrs are generated at the communication portion between the cast hole and the hole. The burrs are removed later in the deburring process, but some of the removed burrs may remain in the cavity in the casting cavity as foreign matter of the present invention.
In the first to fourth embodiments, burrs (foreign matter) remaining in the cast hole (cavity portion) communicating with the hole on the inner peripheral wall of the drilled hole are discharged and removed from the cavity portion to the hole. explain.

(Embodiment 1)
Hereinafter, a foreign matter removing method and a foreign matter removing apparatus according to the present embodiment will be described with reference to FIGS. 1 and 7. 1 to 3 are process diagrams for explaining the foreign matter removing method according to the first embodiment. FIG. 7 is a diagram illustrating a fluid rectifying member used in the foreign matter removing method according to the first embodiment.
The foreign matter removing apparatus 1 includes a fluid rectifying member 10 (fluid rectifying means), a rectifying unit moving means 30, a guide 60, and a fluid supply means 70.
In the present embodiment, air AR is used as the fluid, and the fluid supply means 70 that supplies the air AR to the hole 81H is a facility such as an existing compressor provided in the factory. The fluid used may be a water flow other than air.

  As shown in FIGS. 3 and 7, the fluid rectifying member 10 is connected to the rectifying unit 11 formed at a size corresponding to the diameter of the hole 81 </ b> H and the rectifying unit 11, and from the rectifying unit 11. And a rod-shaped rod portion 15 having a small diameter. The rectifying unit 11 has an outer peripheral end portion 12 that is widened radially outward by a curved surface 11a that is curved from the outer periphery of the rod portion 15 and that is slidable on the inner peripheral wall 82 of the hole 81H. The thickness of the outer peripheral end 12 with respect to the axial direction PQ of the fluid rectifying member 10 is a thickness s (s> 0). Specifically, the thickness s of the outer peripheral end portion 12 is smaller than the opening distances ta and tb (ta> 0, tb> 0) of the opening portion of the cast hole 83 to be described later, for example, about 5 mm or less.

As shown in FIGS. 1 and 2, the guide 60 has a feed hole 60H having a size corresponding to the diameter of the hole 81H, and slides the outer peripheral end 12 of the rectifying unit 11 of the fluid rectifying member 10 into the feed hole 60H. While being moved, the fluid rectifying member 10 is held so as to be able to advance or retract straight with respect to the axial direction of the hole 81H.
The rectifying unit moving means 30 is, for example, a well-known articulated robot, holds the rod unit 15 of the fluid rectifying member 10, and moves the rod unit 15 forward or backward along the axial direction PQ through the feed hole 60H of the guide 60. Thus, the rectifying unit 11 inserted into the hole 81H is moved to change the position of the rectifying unit 11 in the hole 81H. In the rectifying unit moving means 30, the direction in which the fluid rectifying member 10 is inserted into the hole 81H (from left to right in FIG. 1) is the forward direction P, and the inserted fluid rectifying member 10 is withdrawn from the hole 81H (FIG. 1). Middle, right to left) is defined as the backward direction Q, and the forward and backward direction PQ coincides with the axial direction of the hole 81H and the rod portion 15.

Next, a foreign matter removing method according to the present embodiment using the foreign matter removing apparatus 1 will be described with reference to FIGS. 4 to 6 are process diagrams for explaining the foreign matter removing method according to the first embodiment, following FIG. 3.
In the foreign matter removing method according to the present embodiment, for convenience of explanation, as shown in FIG. 1, the workpiece 80 has two cast holes 83 (cavities), and the first cast hole 83A and the second cast hole 83B have the same. The remaining burrs 84 are discharged from the casting cavity 83 to the holes 81H and removed.

Specifically, in the first casting hole 83A and the second casting hole 83B (casting hole 83), the size of the opening portion of the inner peripheral wall 82 of the hole 81H communicating with the hole 81H is as shown in FIG. In addition, the burr 84 is sized to enter the casting cavity 83. For example, the opening 83 in the inner peripheral wall 82 of the hole 81H is relatively small, but the ingot 83 is generated in a shape swelled in a dome shape from the opening on the back side P from the inner peripheral wall 82 of the hole 81H. As shown in FIG. 3, the opening distances ta and tb are, for example, openings of up to about 10 mm.
On the other hand, the burr 84 is smaller than the size of the opening of the casting cavity 83 and is physically sized to enter the casting cavity 83 through the opening. The lengthened part is, for example, about 1 mm or 2 mm.

First, as shown in FIG. 1, the rectifying unit 11 of the fluid rectifying member 10 is inserted in advance into the feed hole 60H of the guide 60, and as shown in FIG. 2, the guide 60 is connected to the feed hole 60H and the hole 81H. Are brought into contact with the workpiece 80 so as to communicate without being displaced as one hole.
Next, the 1st process of the foreign material removal method concerning this embodiment is performed. In the first step, as shown in FIG. 3, the rod-shaped fluid rectifying member 10 having the rectifying unit 11 having a size corresponding to the diameter of the hole 81 </ b> H of the workpiece 80 is moved in the forward direction P by the rectifying unit moving means 30. And is inserted into the hole 81H. The feed speed of the fluid rectifying member 10 by the rectifying unit moving means 30 is, for example, 200 sec. It moves at a very slow uniform speed, such as 5 (mm / sec.) Per second. At the same time, as shown in FIG. 4, the air AR discharged by the fluid supply means 70 is supplied toward the rectifying unit 11 into the flow path in the space between the hole 81 </ b> H and the rod portion 15. The supply pressure of the air AR is, for example, about 0.5 MPa to 1 MPa, and the supply pressure of a compressor or the like in the factory is increased through a nozzle or the like.

Next, the second step of the foreign matter removing method according to this embodiment is performed. In the second step, the flow of the air AR is made to flow from the hole 81H by the rectifying unit 11 at the position where the first casting hole 83A and the second casting hole 83B (casting hole 83) exist while moving the fluid rectifying member 10. The air AR is caused to flow into the casting cavity 83.
That is, while the rectifying unit 11 of the moving fluid rectifying member 10 first passes through the first casting cavity 83A, as shown in FIG. 4, rectification is performed from the inner peripheral wall 82 of the hole 81H in which the first casting cavity 83A exists. The outer peripheral end 12 of the part 11 is separated. As a result, the air AR flows from the space between the hole 81H and the rod portion 15 through the first casting hole 83A from the opening of the first casting hole 83A between the inner peripheral wall 82 and the outer peripheral end portion 12, and rectifies. It flows in the flow path on the back side P from the part 11.

Next, when the rectifying unit 11 passes through the first casting hole 83A and then reaches the second casting hole 83B, as shown in FIG. 5, the rectification unit 11 starts from the inner peripheral wall 82 of the hole 81H having the second casting hole 83B. The outer peripheral end 12 of the Thus, the air AR flows from the space between the hole 81H and the rod portion 15 through the second casting hole 83B from the opening of the second casting hole 83B between the inner peripheral wall 82 and the outer peripheral end portion 12, and is rectified. It flows in the flow path on the back side P from the part 11.
As described in detail later, the burrs 84 remaining in the first casting cavity 83A are discharged into the holes 81H together with the air AR when the air AR flows into the first casting cavity 83A, and the first casting cavity 83A. Removed from 83A. Further, the burr 84 remaining in the second casting cavity 83B is discharged into the hole 81H together with the air AR when the air AR flows into the second casting cavity 83B, and is removed from the second casting cavity 83B.
Next, when the burr 84 is removed from the casting cavity 83 in the workpiece 80, the fluid rectifying member 10 is moved in the backward direction Q by the rectifying unit moving means 30 and extracted from the hole 81H as shown in FIG. The removal operation of the burr 84 is completed.

The operation and effect of the foreign matter removal method and foreign matter removal device according to the present embodiment having the above-described configuration will be described.
In the foreign matter removal method according to this embodiment, the foreign matter removal is performed by discharging the burr 84 remaining in the casting cavity 83 communicating with the hole 81H from the casting cavity 83 to the hole 81H by the inner peripheral wall 82 of the drilled hole 81H. In the method, the rod-shaped fluid rectifying member 10 having the rectifying unit 11 having a size corresponding to the diameter of the hole 81H at the tip is inserted into the hole 81H, and the air AR is supplied to the rectifying unit 11. The second step of changing the flow of the air AR toward the casting cavity 83 by the rectifying unit 11 and flowing the air AR into the casting cavity 83 at the position where the casting cavity 83 exists while moving the fluid rectifying member 10. Therefore, when the air AR supplied in the first step flows through the hole 81H, the burr 84 attached to the inner peripheral wall 82 of the hole 81H can be removed by the flow of the air AR. Further, in the second step, the air AR flowing through the hole 81H flows into the casting cavity 83, so that the burrs 84 remaining in the casting cavity 83 are discharged from the casting cavity 83 to the back channel of the hole 81H. Can be removed.

  That is, as an example of a product having a casting hole 83 communicating with the hole 81H as in the present embodiment, there is an automobile engine block molded by casting. In the engine block, as the oil passage, a small diameter and deep hole 81H formed after casting is drilled by machining as the hole of the present invention. In casting, the casting hole is generated at random positions, and the casting hole 83 formed near the wall surface of the hole 81H and the inner peripheral wall 82 of the hole 83 may communicate with each other inside the engine block after molding. When 81H is processed, burrs are generated at this communicating portion. Although the burrs are removed in the deburring process, the burrs 84 that could not be removed may remain as foreign matter in the casting cavity 83 that is the hollow portion of the present invention.

In this embodiment of the present invention, the burr 84 attached to the inner peripheral wall 82 of the hole 81H can be removed by the flow of the air AR in the first step.
Further, in the second step, the thickness s of the rectifying unit 11 with respect to the direction along the axial direction PQ of the hole 81H is an opening of the hole 81H in the axial direction PQ of the hole 81H at the opening portion opened in the inner peripheral wall 82 of the hole 81H. If the rectification unit 11 reaches the position where the casting hole 83 is located when the distance ta and tb are smaller than the distance ta and tb, the inlet-side flow path and the back-side flow at the back side of the rectification unit 11 in the hole 81H. The road communicates via the cast hole 83 with the rectifying unit 11 interposed therebetween.

While the rectifying unit 11 is moving through the hole 81H along the inner peripheral wall 82 of the hole 81H, the air AR supplied toward the rectifying unit 11 through a nozzle or the like is injected into the hole 81H at a predetermined pressure and is supplied to the rectifying unit 11. In this case, the flow direction is changed and the air flows into the casting cavity 83 through the inlet-side channel. At this time, in the inlet-side flow path, the gap in the axial direction PQ between the inner peripheral wall 82 and the rectifying unit 11 is narrow, and the flow of the air AR becomes a rate-determining step, and the air AR is decelerated, but the air after passing through this gap The AR temporarily becomes a high pressure at the rectifying unit 11 and flows along the inner peripheral wall of the casting cavity 83. As a result, the burrs 84 remaining in the casting cavity 83 can be discharged and removed from the casting cavity 83 to the inner channel of the hole 81H by the air AR that has flowed into the casting cavity 83 and increased in pressure. The burr 84 removed from the casting cavity 83 is discharged outside the hole 81H by a known method.
Therefore, according to the foreign matter removing method according to the present embodiment, there is an excellent effect that the burr 84 remaining in the casting cavity 83 communicating with the hole 81H can be discharged and removed from the casting cavity 83.

  Further, in the foreign matter removing apparatus 1 according to the present embodiment, the burrs 84 remaining in the casting cavity 83 communicating with the holes 81H are discharged from the casting cavity 83 to the holes 81H and removed by the inner peripheral wall 82 of the drilled hole 81H. In the foreign matter removing apparatus 1, the fluid supply means 70 for supplying the air AR to the hole 81H, the rectifying unit 11 formed at the tip corresponding to the diameter of the hole 81H, and the rectifying unit 11 are connected. The fluid rectifying member 10 having the rod portion 15 formed smaller in diameter than the rectifying portion 11 and the rod portion 15 is moved forward or backward in the axial direction PQ to move the rectifying portion 11 inserted into the hole 81H. The rectifying unit moving means 30 for changing the position of the rectifying unit 11 in the hole 81H is provided. Therefore, the air AR is supplied to the hole 81H by the fluid supply unit 70, and the air AR flowing in the hole 81H is supplied. When the position of the rectifying unit 11 is changed in the hole 81H by the rectifying unit moving means 30 while being applied to the flow part 11, the rectifying unit 11 at the tip of the fluid rectifying member 10 reaches the position where the casting hole 83 is located. The air AR hits the rectifying unit 11 and flows into the casting cavity 83 while changing the flow direction. The air AR that has flowed into the casting cavity 83 once flows through the casting cavity 83 and again flows in the hole 81H. At this time, the burrs 84 remaining in the casting cavity 83 are discharged from the casting cavity 83 by the flow of the air AR. Can be removed.

That is, the thickness s in the direction along the axial direction PQ of the hole 81H in the rectifying portion 11 is greater than the opening distances ta and tb in the axial direction PQ of the hole 81H at the opening portion opened in the inner peripheral wall 82 of the hole 81H. If it is formed small, when the rectifying unit 11 at the tip of the fluid rectifying member 10 reaches the position where the cast hole 83 is located, the rectifying unit 11 is sandwiched between the inlet-side flow path of the hole 81H and the rectifying unit 11. The deeper flow path of the hole 81 </ b> H located on the deeper side communicates with the casting hole 83.
While the rectifying unit 11 is moving through the hole 81H along the inner peripheral wall 82 of the hole 81H, the air AR supplied toward the rectifying unit 11 through a nozzle or the like is injected into the hole 81H at a predetermined pressure and is supplied to the rectifying unit 11. In this case, the flow direction is changed and the air flows into the casting cavity 83 through the inlet-side channel. At this time, in the inlet-side flow path, the gap in the axial direction PQ between the inner peripheral wall 82 and the rectifying unit 11 is narrow, and the flow of the air AR becomes a rate-determining step, and the air AR is decelerated, but the air after passing through this gap The AR temporarily becomes a high pressure at the rectifying unit 11 and flows along the inner peripheral wall of the casting cavity 83. As a result, the burrs 84 remaining in the casting cavity 83 can be discharged and removed from the casting cavity 83 to the inner channel of the hole 81H by the air AR that has flowed into the casting cavity 83 and increased in pressure. The burr 84 removed from the casting cavity 83 is discharged outside the hole 81H by a well-known method in addition to the discharge of the air AR by the fluid supply means 70.

Further, even when the casting cavity 83 (the first casting cavity 83A and the second casting cavity 83B) communicating with the hole 81H is scattered at a plurality of locations on the inner peripheral wall 82 of the same hole 81H, the rod portion 15 is moved by the rectifying unit moving means 30. Is moved forward or backward in the axial direction PQ, and the position of the rectifying unit 11 is changed in the hole 81H, so that the burrs 84 remaining in the first casting hole 83A and the second casting hole 83B can be removed. .
Needless to say, foreign matter such as burrs adhering to the inner peripheral wall 82 of the hole 81H is also supplied to the air supplied into the hole 81H while the rectifying unit 11 is moved by moving the rod part 15 forward or backward in the axial direction PQ. It can be removed by AR.

(Embodiment 2)
Hereinafter, the foreign substance removal method and foreign substance removal apparatus according to the present embodiment will be described with reference to FIGS. 1 and 8.
In the foreign matter removing method and foreign matter removing device 1 of the first embodiment, the fluid rectifying member 10 is slowly moved to the hole 81H by the rectifying unit moving means 30 at a constant speed.
On the other hand, in the foreign matter removal method and foreign matter removal apparatus 101 of the second embodiment, when the position where the casting cavity 83 exists is detected by the pressure measuring means 40 and the fluid rectifying member 10 reaches the casting cavity 83, the rectifier control is performed. The fluid rectifying member 10 is decelerated or stopped by the means 50.
That is, the second embodiment differs from the first embodiment in the presence or absence of the pressure measuring means 40 and the rectifying unit control means 50, in that the movement of the fluid rectifying member 10 is decelerated or stopped, and in that the fluid is a water flow. The other parts are the same as in the first embodiment.
Therefore, the description will focus on the parts different from the first embodiment, and the description of the others will be simplified or omitted.

FIG. 8 is a view for explaining the foreign matter removing apparatus according to the present embodiment, and is an explanatory view showing a state of removing the foreign matter.
As shown in FIG. 8, the foreign matter removing apparatus 101 according to the present embodiment includes a fluid rectifying member 10, a rectifying unit moving unit 30, a pressure measuring unit 40, a rectifying unit control unit 50, a guide 60, and a fluid supply. Means 170.
In the present embodiment, the water flow FL is used as the fluid, and the fluid supply means 170 that supplies the water flow FL to the hole 81H has, for example, a discharge pressure of about 0.5 MPa to 2.0 MPa. The ink is discharged into 81H. Although not shown, the space between the guide 60 and the work 80 is liquid-tight so as not to leak the water flow FL by packing or the like.

  The pressure measuring means 40 measures the pressure of the water flow FL flowing in the feed hole 60 </ b> H of the guide 60. The rectifying unit control means 50 includes a microcomputer (not shown) having a known configuration such as a CPU, a ROM, and a RAM. The ROM or the like stores a program for controlling the movement stop of the rectifying unit moving unit 30 and other programs based on the pressure value or the magnitude of the pressure change measured by the pressure measuring unit 40, and is loaded into the CPU. Thus, for example, the rectifying unit moving means 30 can perform a predetermined operation such as advancing and retreating, and driving stoppage.

The rectifying unit moving unit 30 and the pressure measuring unit 40 are connected to the rectifying unit control unit 50, and the rectifying unit control unit 50 controls the rectifying unit moving unit 30 based on the pressure of the water flow FL measured by the pressure measuring unit 40. To do.
Specifically, the rectifying unit control means 50 stores the pressure value of the water flow FL when the rectifying unit 11 of the fluid rectifying member 10 is not in contact with the casting cavity 83 as a reference value and becomes the reference. In the pressure value, the moving speed of the rod part 15 of the fluid rectifying member 10 by the rectifying part moving means 30 is set as a predetermined speed in the hole 81H. Further, when the pressure value of the water flow FL measured by the pressure measuring means 40 falls below the reference value, the rectifying unit control unit 50 causes the fluid rectifying member 10 by the rectifying unit moving unit 30 to move along with the pressure fluctuation of the water flow FL. The moving speed of the rod part 15 is decelerated or stopped.

Next, a foreign matter removing method according to the present embodiment using the foreign matter removing apparatus 101 will be described with reference to FIGS. 9A and 9B are diagrams for explaining the foreign matter removing apparatus 101 according to the present embodiment, where FIG. 9A is an explanatory diagram showing a state of removing burrs, and FIG. 9B is a diagram showing the relationship between the position of the rectifying unit and air pressure. It is a graph.
The first step of the foreign matter removing method according to this embodiment is performed. In the first step, as shown in FIG. 3, the rod-shaped fluid rectifying member 10 having the rectifying unit 11 having a size corresponding to the diameter of the hole 81 </ b> H of the workpiece 80 is moved in the forward direction P by the rectifying unit moving means 30. And is inserted into the hole 81H. At the same time, as shown in FIG. 8A, the water flow FL discharged by the fluid supply means 170 is supplied toward the rectifying unit 11 into the flow path in the space between the hole 81 </ b> H and the rod portion 15.
In the state where the outer peripheral end portion 12 of the rectifying portion 11 of the fluid rectifying member 10 slides on the inner peripheral wall 82 of the hole 81H and the flow of the hole 81H to the rectifying portion 11 is blocked by the rectifying portion 11, the fluid supply means 170 The pressure of the water flow FL supplied to the hole 81H is a predetermined pressure value as a reference.
The rectifying unit control unit 50 moves the feed of the rectifying unit moving unit 30 to the hole 81H of the fluid rectifying member 10 at a set predetermined speed while maintaining the predetermined pressure value serving as the reference.

  The second step of the foreign matter removing method according to the present embodiment is performed. In the second step, the fluid rectifying member 10 is inserted into the hole 81H at a constant speed at a constant speed while detecting the pressure of the water flow FL by the pressure measuring means 40, and when the pressure of the water flow FL decreases, Decelerate or stop the movement of. At this time, at the position where the pressure of the water flow FL is reduced, the cast hole 83 exists, the rectifying unit 11 changes the flow of the water flow FL toward the cast hole 83, and the water flow FL flows into the cast hole 83.

Specifically, when the rectifying unit moving means 30 is feeding the fluid rectifying member 10 into the hole 81H, as shown in FIG. 8B, the outer peripheral end 12 of the rectifying unit 11 of the fluid rectifying member 10 is positioned at the position X1. After reaching the position X3, the outer peripheral end 12 is released from sliding with the inner peripheral wall 82 of the hole 81H and passes through the opening of the cast hole 83 until passing through the position X3.
That is, the flow direction of the water flow FL changes from the flow path between the hole 81H and the rod portion 15 along the curved surface 11a of the rectifying portion 11 and enters the first casting cavity 83A, and then the back side again. It flows through the hole 81H toward P. At this time, since the water flow FL supplied to the hole 81H by the fluid supply means 170 is not blocked by the rectifying unit 11, the flow of the hole 81H is not blocked, so the water flow FL is in the first casting hole 83A (casting hole 83). While flowing around and flowing from the rectifying unit 11 to the previous hole 81H, a pressure drop of the water flow FL occurs as shown in FIG. 9B.

  The pressure measuring means 40 detects the pressure of the water flow FL that has fallen, and the rectifier control means 50 controls the movement of the rectifier moving means 30 based on the detection signal of the pressure measuring means 40, and the fluid rectifying member 10. The feed rate to the hole 81H is decelerated and stopped if necessary. As a result, the time required for the outer peripheral end 12 of the rectifying unit 11 to pass between the position X1 and the position X3 can be increased, so that the time during which the water flow FL flows through the casting cavity 83 is also increased. The burr 84 remaining in the nest 83 is easily discharged and removed from the nest 83 as will be described in detail later.

Further, in the casting cavity 83, for example, although the opening portion in the inner peripheral wall 82 of the hole 81H is relatively small, the inner wall 82 of the hole 81H has a shape bulging in a dome shape from the opening portion on the back side P. Sometimes. In such a case, the burr 84 may remain in a portion of the dome-shaped casting hole 83 that is difficult to be washed away by the flow of the water flow FL.
The curved surface 11a of the rectifying unit 11 is controlled from the position X1 to the position X3 by controlling the rectifying unit moving means 30, decelerating the feed rate of the fluid rectifying member 10 to the hole 81H, and stopping it if necessary. Depending on the position, the flow of the water flow FL flowing through the first casting cavity 83A can be changed. For this reason, the water flow FL flows along the inner wall of the first casting cavity 83A, and the burrs 84 remaining in the portions that are difficult to be removed can be discharged from the casting cavity 83 and removed.

Since the second casting hole 83B (casting hole 83) is the same as the first casting hole 83A, the description thereof is omitted.
Next, when the burr 84 is removed from the casting cavity 83 (the first casting cavity 83A and the second casting cavity 83B) in the workpiece 80, the fluid rectifying member 10 is moved in the backward direction Q by the rectifying unit moving means 30 and extracted from the hole 81H. Thus, the removal operation of the burr 84 from the casting cavity 83 is completed.

The operation and effect of the foreign matter removal method and foreign matter removal device according to the present embodiment having the above-described configuration will be described.
In the foreign matter removal method according to the present embodiment, in the second step, the fluid rectifying member 10 is inserted into the hole 81H at a constant speed while detecting the pressure of the water flow FL, and the pressure of the water flow FL decreases. Since the movement of the fluid rectifying member 10 is decelerated or stopped, even if it is difficult for the operator to confirm the position of the casting cavity 83 from the outside of the hole 81H, the operator can move the hole 81H outside the hole 81H. The position of the casting cavity 83 communicating with the casting cavity 83 can be confirmed with high accuracy, and the burrs 84 remaining in the casting cavity 83 can be discharged from the casting cavity 83 and removed more reliably.

That is, since the flow straightening portion 11 at the tip of the fluid flow straightening member 10 has a size corresponding to the diameter of the hole 81H, when the water flow FL is supplied to the hole 81H in the first step, the flow straightening portion 11 is moved to the back side P of the hole 81H. The flow of the directed water flow FL is blocked by the rectifying unit 11, and the pressure of the water flow FL is maintained at a high pressure when supplied to the hole 81H.
On the other hand, when the rectifying unit 11 reaches the position where the casting cavity 83 exists, the rectifying unit 11 is sandwiched, the inlet-side flow path of the hole 81H, and the back-side flow of the hole 81H on the back side P from the rectifying unit 11 The path communicates with the inner peripheral wall 82 of the hole 81H through a cast hole 83 communicated with the hole 81H. Thereby, the pressure of the water flow FL temporarily decreases while the inlet-side flow path and the back-side flow path of the hole 81H are in communication.
Therefore, if the movement of the fluid rectifying member 10 is decelerated or stopped during this period, the water flow FL supplied to the inlet-side flow path of the hole 81H surely flows into the casting cavity 83, and the remaining burr 84 is more reliably detected. It can be discharged from the casting cavity 83 and removed.

  Further, in the foreign matter removing apparatus 101 according to the present embodiment, the pressure measuring means 40 that measures the pressure of the water flow FL and the rectification that controls the rectifying unit moving means 30 based on the pressure of the water flow FL measured by the pressure measuring means 40. Since the flow controller 11 is appropriately disposed at the position where the cast hole 83 exists, the water flow FL can flow into the cast hole 83.

That is, when the water flow FL is supplied to the hole 81H in the first step while the fluid rectifying member 10 is inserted at a constant speed, the rectifying unit 11 at the tip of the fluid rectifying member 10 has a size corresponding to the diameter of the hole 81H. Therefore, the flow of the water flow FL toward the inner side P of the hole 81H is blocked by the rectifying unit 11, and the pressure of the water flow FL is maintained at a high pressure when supplied to the hole 81H.
On the other hand, when the rectifying unit 11 reaches the position where the casting cavity 83 exists, the rectifying unit 11 is sandwiched, the inlet-side flow path of the hole 81H, and the back-side flow of the hole 81H on the back side P from the rectifying unit 11 The road communicates with the inner wall 82 of the hole 81H through a cast hole 83 communicated with the hole. Thereby, since the pressure of the water flow FL temporarily decreases while the inlet-side flow path and the back-side flow path of the hole 81H are in communication, even if the fluid rectifying member 10 is inserted at a constant speed, The position of the casting cavity 83 can be detected by the pressure change of the water flow FL.
Therefore, if the movement of the fluid rectifying member 10 is decelerated or stopped at the position where the casting hole 83 is detected, the water flow FL supplied to the inlet-side flow path of the hole 81H surely flows into the casting hole 83 and remains in the remaining burrs. 84 can be discharged and removed from the casting cavity 83 more reliably.

(Embodiment 3)
Hereinafter, the foreign matter removing apparatus according to the present embodiment will be described with reference to FIGS. 9 to 12.
In the foreign matter removing apparatus according to the first embodiment, the fluid rectifying member 10 in which the rod-shaped rod portion 15 is connected to the rectifying portion 11 having the curved surface 11a curved from the outer periphery of the rod portion 15 is used.
On the other hand, in the foreign matter removing apparatus of the third embodiment, the rectifying unit that communicates with the rod hollow portion 115H of the rod portion 115 formed in a pipe shape and forms the rectifying discharge portion 111H penetrating toward the inner peripheral wall 82 of the hole 81H. A fluid rectifying member 110 having 111 is used.
That is, the third embodiment is different from the first embodiment in terms of the shape of the fluid rectifying member, but is otherwise the same as in the first embodiment except that air is used for the fluid.
Therefore, the description will focus on the parts different from the first embodiment, and the description of the others will be simplified or omitted.

  FIG. 9 is a diagram illustrating a fluid rectifying member used in the foreign matter removing apparatus according to the present embodiment. As shown in FIG. 9, the fluid rectifying member 110 used in the foreign matter removing apparatus 201 includes a rectifying unit 111 and a rod unit 115. The rod portion 115 is formed in a pipe shape having an outer diameter of 4 (mm) and an inner diameter of 3.6 (mm), for example, and has a rod hollow portion 115H serving as a flow path for the air AR in the diameter. The rectifying unit 111 includes an annular member 113 in which the rod portion 115 is inserted in the diameter, and a disc-shaped member 114 in which the tip of the rod portion 115 is connected to the central portion. The annular member 113 and the disk-shaped member 114 may be fixed at a predetermined interval, or may be provided so that the annular member 113 can be movably fixed to the rod portion 115.

  A through hole 116 </ b> H communicating with the rod hollow portion 115 </ b> H is formed on the outer periphery of the rod portion 115 between the annular member 113 and the disk-like member 114. The rectifying unit 111 has an outer peripheral end 112 formed in a size slidable on the inner peripheral wall 82 of the hole 81H in the annular member 113 and the disc-shaped member 114, respectively. The thickness of the outer peripheral end portion 112 is about 0.2 (mm) in the present embodiment. Further, the rectification unit 111 includes a rectification discharge unit 111H penetrating toward the inner peripheral wall 82 of the hole 81H with respect to the radial direction RD of the rectification unit 111 between the annular member 113 and the disk-shaped member 114. Yes.

  The annular member 113 and the disk-shaped member 114 have a thickness m (m> 0) with respect to the axial direction PQ of the fluid rectifying member 110, and this thickness m is the thickness of the fluid rectifying member 10 according to the first embodiment. Similar to the thickness s, it is smaller than the opening distances tc and td (tc> 0, td> 0) of the opening of the casting cavity 83, for example, about 3 mm or less. The outer peripheral end 112 of the annular member 113 and the disk-shaped member 114 has a thickness smaller than the thickness m, for example, a thickness of 0.2 (mm) or the like. The rod hollow portion 115H and the rectifying and discharging portion 111H communicate with each other through the through hole 116H of the rod portion 115.

In the present embodiment, the size of the burr 84 that remains in the casting cavity 83 and is removed by the fluid rectifying member 110 is smaller than the size of the opening of the casting cavity 83, and physically from the opening to the casting cavity 83. For example, in addition to fine granular burrs, a portion having the longest dimension in the burrs is, for example, about 2 mm or less.
Further, in the cast hole 83, as shown in FIGS. 10 to 12, the opening in the inner peripheral wall 82 of the hole 81H is relatively small, about 3 mm, but the cast hole 83 has the inner peripheral wall of the hole 81H. On the back side from 82, the shape is swelled in a dome shape from the opening. In such a cast hole 83, the burrs 84 may be scattered and remain along the dome-shaped inner wall of the cast hole 83.

FIG. 10 is a view for explaining the foreign matter removing apparatus according to this embodiment. FIG. 11 is an explanatory diagram showing an enlarged main part in FIG. FIG. 12 is an explanatory diagram showing, in an enlarged manner, the main part at a position different from FIG. 11 in FIG.
The first step of the foreign matter removing method according to this embodiment is performed. In the first step, the rod-like fluid rectifying member 110 having the rectifying portion 111 having a size corresponding to the diameter of the hole 81H of the workpiece 80 is moved in the forward direction P by the rectifying portion moving means 30 and inserted into the hole 81H. To do.
The feeding speed of the fluid rectifying member 110 by the rectifying unit moving means 30 is, for example, 200 sec. It moves at a very slow uniform speed, such as 5 (mm / sec.) Per second. At the same time, the air AR discharged from the fluid supply means 70 is supplied to the rod hollow portion 115 </ b> H of the rod portion 115 toward the rectifying portion 111. The supply pressure of the air AR is, for example, about 0.5 MPa to 1 MPa.

Next, the second step of the foreign matter removing method according to this embodiment is performed. In the second step, as shown in FIG. 10, the flow of the air AR is performed by the rectifying unit 111 at the position where the first casting hole 83 </ b> C and the second casting hole 83 </ b> D (casting hole 83) exist while moving the fluid rectifying member 110. Is changed from the hole 81H toward the casting cavity 83, and the air AR is caused to flow into the casting cavity 83.
Specifically, the fluid rectifying member 110 is moved to the inner side P of the hole 81H by the rectifying unit moving means 30, and the outer peripheral end 112 of the annular member 113 of the rectifying unit 111 is cast into the cast hole 83 as shown in FIG. When it is located closer to the back side P of the opening, the rectifying discharge portion 111H of the rectifying portion 111 and the first cast hole 83C communicate with each other with a slight gap.
In such a state, the air AR supplied at a predetermined pressure through the rod hollow portion 115H, the through hole 116H, and the rectifying and discharging portion 111H by the fluid supply means 70 flows into this slight gap. At this time, a slight gap is narrow, and the air AR is in a rate-determining step, and the air AR is decelerated. However, the air AR immediately after passing through this gap temporarily becomes a high pressure, and the flow velocity is accelerated. 11, it flows vigorously along the dome-shaped inner wall of the casting cavity 83 in the direction of the arrow shown in the first casting cavity 83 </ b> C. As a result, the burr 84 remaining on the inlet side Q of the inner wall is discharged and removed from the casting cavity 83 by the flow of the air AR, and moves to the space between the inner peripheral wall 82 of the hole 81H and the rod portion 115. .

  At the same time, when the outer peripheral end 112 of the disk-shaped member 114 of the rectifying unit 111 is located near the entrance side Q of the opening of the cast hole 83 as shown in FIG. In some cases, the two casting holes 83D communicate with each other with a slight gap. In this state, the air AR supplied through the rod hollow portion 115H, the through hole 116H, and the rectifying and discharging portion 111H by the fluid supply means 70 accelerates the flow velocity immediately after passing through this slight gap, 11, it flows vigorously along the dome-shaped inner wall of the casting cavity 83 in the direction of the arrow shown in the second casting cavity 83 </ b> D. As a result, the burrs 84 adhered and remaining on the inner side P of the inner wall are discharged and removed from the casting cavity 83 by the flow of the air AR, and move from the rectifying unit 111 to the hole 81H on the inner side P.

On the other hand, although not shown in FIG. 11 in order to avoid being difficult to see, the outer peripheral end 112 is disposed closer to the back side P of the opening of the first casting cavity 83C, and the air AR is Even if it flows into one casting cavity 83C, as shown in FIG. 12, in the first casting cavity 83C, the burrs 84 remaining near the inner side P of the hole 81H of the opening may not be completely removed.
In such a case, the fluid rectifying member 110 is returned to the inlet side Q of the hole 81H by the rectifying unit moving means 30, and the outer peripheral end 112 of the annular member 113 of the rectifying unit 111 is cast into the cast hole as shown in FIG. It arrange | positions near the entrance side Q of the opening part of 83, and the rectification | straightening discharge part 111H of the rectification | straightening part 111 and the 1st casting hole 83C are connected with a slight clearance gap.

  In such a state, the air AR supplied at a predetermined pressure through the rod hollow portion 115H, the through hole 116H, and the rectifying discharge portion 111H by the fluid supply means 70 flows into this slight gap. At this time, a slight gap is narrow, and the air AR is in a rate-determining step, and the air AR is decelerated. However, the air AR immediately after passing through this gap temporarily becomes a high pressure, and the flow velocity is accelerated. 12, it flows vigorously along the dome-shaped inner wall of the casting cavity 83 in the direction of the arrow shown in the first casting cavity 83 </ b> C. As a result, the burrs 84 attached and remaining near the inlet side Q of the inner wall are discharged and removed from the casting cavity 83 by the flow of the air AR, and moved to the space between the inner peripheral wall 82 of the hole 81H and the rod portion 115. To do.

Since the second casting hole 83D (casting hole 83) is the same as the first casting hole 83C, description thereof is omitted.
Thus, the burr 84 removed from the casting cavity 83 and moved to the space between the inner peripheral wall 82 of the hole 81H and the rod part 115 and the burr 84 moved to the hole 81H on the back side P from the rectifying part 111 are fluid supply means 70. In addition to the discharge of the air AR, it is discharged outside the hole 81H by a known method.

The operation and effect of the foreign matter removal method and foreign matter removal device according to the present embodiment having the above-described configuration will be described.
In the foreign matter removal method according to this embodiment, the foreign matter removal is performed by discharging the burr 84 remaining in the casting cavity 83 communicating with the hole 81H from the casting cavity 83 to the hole 81H by the inner peripheral wall 82 of the drilled hole 81H. In the method, a first step of inserting a rod-like fluid rectifying member 110 having a rectifying portion 111 having a size corresponding to the diameter of the hole 81H at the tip into the hole 81H and supplying air AR to the rectifying portion 111; A second step of changing the flow of the air AR toward the casting cavity 83 by the rectifying unit 111 and causing the air AR to flow into the casting cavity 83 at a position where the casting cavity 83 exists while moving the rectifying member 110. When the air AR supplied in the first step flows through the hole 81H, the burr 84 attached to the inner peripheral wall 82 of the hole 81H can be removed by the flow of the air AR. Further, in the second step, the air AR flowing through the hole 81H flows into the casting cavity 83, so that the burr 84 remaining in the casting cavity 83 becomes a space between the inner peripheral wall 82 of the hole 81H and the rod portion 115, Alternatively, it can be removed by being discharged from the cast hole 83 into the hole 81H on the back side P from the rectifying unit 111.

In addition, the thickness m of the rectifying portion 111 in the direction along the axial direction PQ of the hole 81H is determined by the opening distance tc, td of the hole 81H in the axial direction PQ at the opening portion opened in the inner peripheral wall 82 of the hole 81H. If it is formed small, when the rectifying portion 111 at the tip of the fluid rectifying member 110 reaches the position where the casting hole 83 is located in the second step, the rectifying portion 111 is sandwiched between the inner peripheral wall 82 of the hole 81H and A space with the rod portion 115 or a hole 81H on the back side P from the rectifying portion 111 and the rectifying discharge portion 111H of the rectifying portion 111 communicate with each other through a cast hole 83.
At this time, as described above, the air AR supplied through the rod hollow portion 115H hits the disk-like member 114 of the rectifying unit 111 and changes the direction of the flow, and flows through the through hole 116H and the rectifying discharge unit 111H to form the casting cavity 83. Flow into.
Therefore, according to the foreign matter removing method according to the present embodiment, there is an excellent effect that the burr 84 remaining in the casting cavity 83 communicating with the hole 81H can be discharged and removed from the casting cavity 83.

  In the foreign matter removing apparatus 201 according to the present embodiment, the rod portion 115 is formed in a pipe shape, and has a rod hollow portion 115H serving as a flow path for the air AR in the diameter, and the rectifying portion 111 is an inner peripheral wall of the hole 81H. 82 has an outer peripheral end portion 112 sized to be slidable, and has at least one rectifying discharge portion 111H penetrating toward the inner peripheral wall 82 of the hole 81H in the radial direction RD of the rectifying portion 111. Since the rod hollow portion 115H and the rectifying discharge portion 111H communicate with each other, the air AR supplied by the fluid supply means 70 flows through the rod hollow portion 115H of the rod portion 115, and the rectifying discharge portion of the rectifying portion 111 It is discharged toward the inner peripheral wall 82 of the hole 81H through 111H, flows into the casting cavity 83, and concentrates on the foreign matter remaining in the casting cavity 83, so that the burr 84 is more easily removed.

That is, when the air AR is caused to flow from the rectifying and discharging portion 111H via the rod hollow portion 115H, in the rectifying portion 111 having the rectifying and discharging portion 111H, the outer peripheral end portion 112 of the annular member 113 on the inlet side Q of the hole 81H The air AR can be rectified by using the two outer peripheral end portions 112 and 112 with the outer peripheral end portion 112 of the disk-like member 114 on the back side P of the hole 81H across the rectifying discharge portion 111H.
When the hollow portion is the cast hole 83 as in the present embodiment, as described above, the opening portion of the cast hole 83 in the inner peripheral wall 82 of the hole 81H is relatively smaller than the inner peripheral wall 82 of the hole 81H. On the back side P, it may exist in a shape swelled from the opening. In such a case, if burrs 84 remain in the dome-shaped bulge 83 that swells in a dome shape behind the opening, depending on the position where it remains in the dome-shaped burrow 83, a fluid may simply flow into the burrow 83. Can also be difficult to remove.

In the foreign matter removing apparatus 201 of the present embodiment, as shown in FIG. 11, the air AR is formed in a dome-shaped casting cavity 83 along the outer peripheral end 112 of the annular member 113 of the rectifying unit 111 on the inlet side Q of the hole 81H. Burr 84 remaining at the position P on the back side P of the hole 81H in the casting cavity 83 is caused to flow into the casting cavity 83 when flowing toward the inlet side Q of the hole 81H along the inner peripheral shape of the casting cavity 83. The air AR decelerated at the time of inflow is injected at a high pressure, and is easily discharged from the casting cavity 83 by the air AR flow.
On the other hand, as shown in FIG. 11, the air AR flows into the dome-shaped casting cavity 83 along the outer peripheral end portion 112 of the disc-like member 114 of the rectifying portion 111 on the inner side P of the hole 81H. When flowing toward the inner side P of the hole 81H along the inner peripheral shape of the nest 83, the burr 84 remaining at the position of the inlet side Q of the hole 81H in the nest 83 is decelerated when flowing into the nest 83. The flow of the air AR is injected at a high pressure, and the air AR is easily discharged from the casting cavity 83 by the flow of the air AR.
The burr 84 discharged from the casting cavity 83 is discharged between the rod portion 115 and the inner peripheral wall 82 of the hole 81H or into the hole 81H on the back side P from the rectifying portion 111.

Further, the flow path of the air AR can be separated into the rod hollow portion 115H, and the discharge path of the burr 84 discharged from the casting cavity 83 can be separated into the space between the rod portion 115 and the inner peripheral wall 82 of the hole 81H. Therefore, when the air AR flows into the casting cavity 83, the burrs 84 discharged from the casting cavity 83 are not mixed with the air AR, and the burrs 84 do not enter the casting cavity 83 again.
Note that, in the relationship between the diameter of the hole 81H and the diameter of the rod hollow portion 115H, the distance in the radial direction RD between the outer peripheral surface of the rod portion 115 and the inner peripheral wall 82 of the hole 81H is the burr 84 remaining in the casting cavity 83. In this shape, it is necessary to set the diameter of the rod hollow portion 115H corresponding to the diameter of the hole 81H so as to be larger than the size of the portion where the dimension becomes the longest.

(Embodiment 4)
Hereinafter, the foreign substance removal method and foreign substance removal apparatus according to the present embodiment will be described with reference to FIG.
In the foreign matter removing apparatus according to the first embodiment, the fluid rectifying member 10 in which the rod-shaped rod portion 15 is connected to the rectifying portion 11 having the curved surface 11a curved from the outer periphery of the rod portion 15 is used.
On the other hand, in the fourth embodiment, the rod portion 215 having a solid rod shape is connected at the central portion of the rectifying portion 211 in the radial direction RD, and the outer peripheral end portion 212 of the rectifying portion 211 is narrowed toward the distal end side of the rod portion 215. A fluid rectifying member 210 formed in a curved shape is used.
That is, the fourth embodiment is different from the first embodiment only in the shape of the fluid rectifying member, and the other parts are the same as those in the first embodiment.
Therefore, the description will focus on the parts different from the first embodiment, and the description of the others will be simplified or omitted.

In the fluid rectifying member 210 of the present embodiment, the rectifying portion 211 has an outer peripheral end portion 212 formed to be slidable on the inner peripheral wall 82 of the hole 81H, and the rod portion 215 has a solid rod shape. Yes, and connected to the rectifying unit 211 at the central portion of the rectifying unit 211 in the radial direction RD. The rectifying part 211 is formed in a plate shape smaller than the opening distance of the opening part of the first casting hole 83E and the second casting hole 83F (casting hole 83), and has an inclined surface 211a that narrows toward the inner side P of the hole 81H. Have. In the present embodiment, the thickness of the outer peripheral end 212 is about 0.2 (mm).
The fluid rectifying member 210 has an inner diameter of the hole 81H of less than 9 (mm), for example, and removes the remaining part of the burr 84 whose length is the longest, for example, about 2 mm. The target of.

In the foreign matter removing apparatus 301 of the present embodiment, the rectifying part 212 has an outer peripheral end part 212 formed in a size that can slide on the inner peripheral wall 82 of the hole 81H, and the rod part 215 has a solid rod shape. Yes, since the rectifying unit 211 is connected to the rectifying unit 211 in the radial direction RD center of the rectifying unit 211, the flow path of the air AR is formed between the rod part 215 and the inner peripheral wall 82 of the hole 81H, The air AR supplied by the fluid supply means 70 is cast from the inner peripheral wall 82 of the hole 81H with almost no flow from between the outer peripheral end 212 and the inner peripheral wall 82 to the back side P of the hole 81H beyond the rectifying unit 211. It becomes easy to flow into the nest 83. Further, using the space of the hole 81H on the back side P from the rectifying unit 211, along with the flow of the air AR, the burr 84 from the cast hole 83 is discharged to the outside of the hole 81H along the inclined surface 211a of the rectifying unit 211. Can be made.
In the relationship between the diameter of the hole 81H and the diameter of the rod portion 215, the distance in the radial direction RD between the outer peripheral surface of the rod portion 215 and the inner peripheral wall 82 of the hole 81H is the burr 84 remaining in the cast hole 83. It is necessary to set the diameter of the rod portion 215 in correspondence with the diameter of the hole 81H so as to be larger than the size of the part where the dimension becomes the longest.

In the above, the present invention has been described according to the first to fourth embodiments. However, the present invention is not limited to the first to fourth embodiments, and can be appropriately modified and applied without departing from the gist thereof. .
(1) For example, in Embodiments 1, 3, and 4, the fluid is air, and in Embodiment 2, the fluid is a water flow. However, in addition to air and water flow, the fluid may be, for example, a gas such as a gas discharged at a predetermined pressure, a liquid cleaning agent, or the like.
(2) In the first to fourth embodiments, the foreign matter is the burr 84. However, as foreign materials, for example, burrs generated when holes are drilled by machining, as well as processing oil when processing this product in the manufacturing stage of products with holes, or adhered when this product is washed It is a residue of a cleaning agent, sludge, etc., and when used as a product, if it remains in a hole or a cavity, the use of the product is hindered.
(3) Moreover, in Embodiment 3, it replaced with the fluid rectification member 10 of the foreign material removal apparatus 1 which concerns on Embodiment 1, and used the fluid rectification member 110. FIG. However, the fluid rectifying member 110 may be used in place of the fluid rectifying member 10 of the foreign matter removing apparatus 101 according to the second embodiment.

1, 101, 201, 301 Foreign matter removing device 10, 110 Fluid rectifying member (fluid rectifying means)
11, 111, 211 Rectification part 111H Rectification discharge part 12, 112, 212 Outer peripheral end parts 15, 115, 215 Rod part 115H Rod hollow part 30 Rectification part moving means 40 Pressure measurement means 50 Rectification part control means 70, 170 Fluid supply means AR Air (fluid)
FL Water flow (fluid)
81H Hole 82 Inner peripheral wall 83 Cast hole (cavity)
84 Burr (foreign matter)
PQ axial direction RD radial direction

Claims (4)

In the foreign matter removing method for removing the foreign matter remaining in the hollow portion communicating with the hole at the inner peripheral wall of the bored hole by discharging the hollow portion to the hole,
A rod-like fluid rectifying member having a rectifying portion having an outer peripheral end portion sized to be slidable on the inner peripheral wall of the hole is inserted into the hole, and fluid is directed toward the rectifying portion. A first step of supplying;
Yes at a position where the cavity is present while moving the fluid rectifying members, changing towards the flow of the fluid by the rectifying unit to the cavity, and a second step of flowing the fluid to the cavity, the And
In the second step, while detecting the pressure of the fluid, the fluid rectifying member is inserted into the hole at a constant speed at a constant speed, and when the fluid pressure decreases, the movement of the fluid rectifying member is decelerated. Alternatively, a foreign matter removing method characterized by stopping . In the foreign matter removing apparatus for removing the foreign matter remaining in the hollow portion communicating with the hole at the inner peripheral wall of the bored hole by discharging the hollow portion to the hole,
Fluid supply means for supplying fluid to the holes;
A rectifying portion having an outer peripheral end formed in a size slidable on the inner peripheral wall of the hole at the tip, and a rod portion connected to the rectifying portion and having a smaller diameter than the rectifying portion; Fluid rectifying means having
Rectifying unit moving means for moving the rectifying unit inserted into the hole by moving the rod part forward or backward in the axial direction and changing the position of the rectifying unit in the hole;
Pressure measuring means for measuring the pressure of the fluid;
Based on the pressure of the fluid measured by the pressure measuring means, the rectifier moving means is controlled.
Rectifier control means to control;
A foreign matter removing device comprising: The foreign matter removing apparatus according to claim 2 ,
The rectifying unit has an outer peripheral end formed in a size slidable on the inner peripheral wall of the hole,
The foreign matter removing apparatus according to claim 1, wherein the rod portion has a solid rod shape and is connected to the rectifying portion at a radial center portion of the rectifying portion. The foreign matter removing apparatus according to claim 2 ,
The rod portion is formed in a pipe shape, and has a rod hollow portion serving as a flow path for the fluid in a diameter.
The rectifying unit has an outer peripheral end formed in a size slidable on the inner peripheral wall of the hole, and the rectifying unit is directed toward the inner peripheral wall of the hole with respect to a radial direction of the rectifying unit. Having at least one rectifying and discharging part penetrating
The foreign substance removing apparatus, wherein the hollow rod portion and the rectifying and discharging portion communicate with each other.

Images