JP6255952B2 - Cross hole processing apparatus and cross hole ridge line processing method - Google Patents

Description

  The present invention relates to a cross hole processing apparatus and cross hole processing for performing removal of burrs generated on a ridge line of a crossing portion, chamfering processing of a ridge line portion of a cross hole formed by crossing two holes in a workpiece. The present invention relates to a ridge line processing method.

  In a member that allows a plurality of pipelines to communicate with each other to perform a desired fluid action, burrs are generated at the ridge lines at the intersections of the holes when the pipelines are formed with holes that intersect each other. When burrs are generated, the fluid flow is disturbed, or peeled burrs are clogged inside the pipe, so it is important to remove the burrs. As a method of deburring the intersection, a working fluid mixed with liquid and hard particles is injected into the hole from the opening of the hole, and the flow path adjustment tool is fixed to the channel on the ridge line side where the burr of the intersection is present, There is a technique for removing the burr at the intersection by narrowing the gap between the ridge line and the flow path adjustment tool and narrowing the flow path near the burr to increase the flow rate of the processing liquid in the vicinity of the burr. (For example, see Patent Document 1)

JP 7-237197 A

In the prior art, in order to efficiently remove burrs at the intersection, it is important to set the flow rate of the working fluid in the vicinity of the burrs to a predetermined speed. For this reason, it is necessary that the flow rate of the machining fluid and the size of the flow path in the vicinity of the burr are appropriate. However, if the gap is set smaller than the height of the burr, the burr is pressed by the flow path adjusting tool and cannot be removed, and therefore the gap cannot be made smaller than the maximum burr height. For this reason, the gap between the flow path adjuster and the ridge line is larger than the maximum height of the burr. Generally, the higher the height of the burr, the easier it is to remove, and the lower one is difficult to remove. For this reason, it takes time to remove burrs having a low height, and the burrs removal time as a whole becomes long.
The present invention has been made in view of the above circumstances, and it is possible to increase the burr removal efficiency regardless of the height of the burr and to efficiently perform deburring and chamfering at the intersection of the intersection hole. It is an object of the present invention to provide an apparatus and a method for processing a ridge line of an intersecting hole.

  The feature of the invention according to claim 1 for solving the above-mentioned problem is that the opening of the first hole of the workpiece having the first hole and the second hole intersecting the first hole is provided. A machining fluid injection device for injecting a machining fluid in which liquid and hard particles are mixed into at least one of the openings in the second hole, and at an intersection of the first hole and the second hole; Deburring of burrs generated on ridge lines and chamfering of the ridge lines, in a cross hole processing apparatus, a flow path adjustment tool arranged at the intersection, and a gap adjustment for adjusting a gap between the ridge lines and the flow path adjustment tool Providing means.

Further , the flow path adjuster is configured by an elastic body having holes therein, and the gap adjusting unit includes a fluid supply unit that fills the holes with fluid and expands the flow path adjuster. That is.

The invention according to claim 2 is characterized in that, in the invention according to claim 1, the gap adjusting means is controlled so as to adjust the gap between the ridgeline and the flow path adjuster in accordance with the elapsed time of deburring. Providing a control means.

A feature of the invention according to claim 3 is that the first hole and the second hole intersecting the first hole using the intersecting hole processing device according to any one of claims 1 to 2. The deburring of the ridgeline at the intersection of the workpiece having the above or the chamfering of the ridgeline is performed.

  According to the invention of claim 1, by adjusting the gap between the flow path adjuster and the ridge line, the flow rate of the machining fluid passing through this gap can be adjusted. The efficiency of deburring varies depending on the flow rate, and the higher the speed, the higher the efficiency. By setting a desired gap with the gap adjusting means, it is possible to realize a cross hole machining apparatus that can remove burrs with a desired efficiency.

Furthermore , the flow path adjustment tool can be expanded by filling the flow path adjustment tool formed of an elastic body having holes therein with a fluid supply means. A cross hole machining apparatus that can easily adjust the gap between the flow path adjuster and the ridge line to a desired gap can be realized depending on the degree of expansion of the flow path adjuster.

According to the second aspect of the present invention, the gap between the flow path adjuster and the ridge line can be adjusted to the optimum gap according to the progress of the burr removal, and the intersection that efficiently removes the burr and chamfers the ridge line. A hole drilling device can be realized.

According to the invention according to claim 3 , by using the cross hole machining apparatus according to any one of claims 1 to 2 , it is possible to increase the flow rate of the machining liquid at the ridge line portion of the cross hole. Thus, it is possible to realize a method for processing a ridgeline of an intersecting hole that can efficiently remove burrs generated on the ridgeline and chamfer the ridgeline.

  ADVANTAGE OF THE INVENTION According to this invention, the removal efficiency of a burr | flash can be made high irrespective of the height of a burr | flash, and the deburring and chamfering process of the intersection part of a cross hole can be performed efficiently, and the cross hole processing apparatus and the ridgeline processing method of a cross hole Can provide.

1 is an overall conceptual diagram of a cross hole machining apparatus in an embodiment of the present invention. It is sectional drawing which shows the cross | intersection part of a cross hole. It is sectional drawing which shows the arrangement | positioning state in a flow-path adjustment tool and cross | intersection part in embodiment of this invention. It is a figure which shows the condition of the flow-path adjustment tool at the time of the deburring of this invention, and an intersection part. It is process drawing which shows the process of the deburring of this invention. It is sectional drawing which shows the arrangement | positioning state in a flow path adjustment tool and a crossing part in the deformation | transformation aspect of this invention. It is AA sectional drawing of FIG.

An embodiment of the present invention will be described.
A cross hole machining apparatus 1 shown in FIG. 1 includes a tank 2, a pump 3, a pipeline 4, and an injection port 5 that constitute a machining liquid injection apparatus, and a holding table 6 that holds a workpiece W. The machining fluid in the tank 2 is supplied to the injection port 5 attached to the workpiece W via the pipe line 4 by the pump 3 to process the inside of the work part W. The processed liquid after the completion of processing is recovered in the tank 2 by a recovery pipe line 7 communicating with the tank 2 from the holding table 6. The processing liquid is a mixture of water or oil liquid and hard particles such as alumina or silicon carbide powder, and an agitator 8 for stirring the processing liquid in the tank 2 is provided above the tank 2 to prevent separation. In preparation. On the holding table 6, a flow path adjustment tool driving device 10 that moves the flow path adjustment tool 9 is fixed. The flow path adjuster driving device 10 can position the flow path adjuster 9 in a desired position by moving the flow path adjuster 9 back and forth with a motor (not shown). In addition, a switching valve 12 and an air source 11 constituting a fluid supply means are connected to the flow path adjuster 9 via a pipe line 13.

  The cross hole processing apparatus 1 includes a control device 30 that processes a ridge line of the cross hole of the workpiece W by executing a predetermined operation. The functional configuration of the control device 30 includes a machining fluid control unit 31 that controls the supply of machining fluid, a flow channel adjustment tool control unit 32 that controls the flow channel adjustment tool driving device 10 and the switching valve 12, and the like.

Here, the kind of cross hole of the working part W will be described.
As shown in FIG. 2 (a), when a through hole W2a (first hole) is formed and then a through hole W1a (second hole) is formed by drilling from above, a cross hole is formed. Wb is generated on the ridge line around the upper through hole W1a. Even when the blind hole W1b is formed by drilling from the upper side after forming the through hole W2a shown in FIG. 2B, the burr Wb is generated on the ridge line around the upper blind hole W1b.

FIG. 3 is a schematic cross-sectional view showing the workpiece W and the flow path adjustment tool 9, and shows a state in which the flow path adjustment tool 9 is inserted into the intersecting portion from the through hole W2a. In order to constitute the gap adjusting means, the flow path adjusting tool 9 has a tip portion 91 formed of rubber and has a hole 92 therein, the tip portion 91 is connected to a shaft 93, and the shaft 93 is internally connected to an air duct. 94. The air hole 92 and the air conduit 94 communicate with each other, and by supplying air to the air conduit 94 via the conduit 13, the tip end portion 91 can be expanded to adjust the gap with the ridgeline. .
Here, the tip 91 has been described as an example of being molded from rubber, but it is only necessary to be molded from an elastic body that can be elastically deformed, such as a resin or a diaphragm-like metal.

Below, the operation | movement of the cross hole processing apparatus 1 is demonstrated based on FIG. 4, FIG.
The workpiece W is attached to the holding table 6 (S1). The injection port 5 is attached to the opening of the through hole W1a on the side where the burr is generated. Here, it attracts | sucks to the work part W with magnetic force (S2). As shown in FIG. 4A, the flow path adjuster 9 is inserted by the flow path adjuster driving device 10 from the opening of the through hole W2a to the intersection of the through hole W2a and the through hole W1a. At this time, the tip portion 91 of the flow path adjuster 9 is a contracted state, the gap of the tip portion 91 and the ridge is t _0. The size of t ₀ is set to a value larger than the maximum value of the tall burr Wb (S3). The pump 3 is activated to inject the machining fluid into the through hole W1a through the injection port 5. The machining liquid flows out from the gap between the tip 91 and the ridge line toward the through hole W2a, and the removal starts from a large burr with a height that is easy to be removed because the force received from the machining liquid is large (S4).

The switching valve 12 is switched to supply air from the air source 11 to the flow path adjuster 9 to fill the air holes 92 with air. Tip 91 expands with the air supply, narrows the gap of the tip portion 91 and the ridge, after a predetermined time has elapsed, the clearance t ₁ as shown in (b) diagram of Figure 4. The narrower the gap, the faster the flow rate of the machining fluid and the more efficient removal of burrs with low height. The air supply speed is set in advance to a speed that can secure the time required for deburring and chamfering the ridge line in accordance with the burr removal efficiency (S5). The switching valve 12 is switched to exhaust air from the flow path adjuster 9. Tip 91 contracts as the exhaust, the clearance of the tip portion 91 and the ridge becomes wide, the gap t ₀ as shown in (c) diagram of Fig. 4 (S6). The pump 3 is stopped to stop the machining fluid injection (S7). The flow path adjuster 9 is retracted and removed from the through hole W2a (S8). The injection port 5 is removed from the opening of the through hole W1a (S9). The workpiece W is removed from the holding table 6 (S10).

  As described above, according to the present embodiment, the size of the gap between the distal end portion 91 of the flow path adjustment tool 9 and the ridge line can be adjusted by expanding and contracting the distal end portion 91 of the flow path adjustment tool 9. By adjusting the size of the gap at the start of removal according to the height of the burr, or by narrowing the gap along with the progress of burr removal, the removal efficiency of burrs with low height can be increased. The efficiency of removal and chamfering processing of the ridge line tip can be improved.

In the above embodiment, as an example of the gap adjusting means, the air hole 92 at the tip end portion 91 of the flow path adjusting tool 9 is filled with air to adjust the size of the gap, but as shown in FIG. The flow path adjustment tool 90 may be inserted from the opening on the ridge line side opposite to the ridge line where the burr of the through hole W1a is generated, and the flow path adjustment tool 90 may be moved to adjust the size of the gap. The flow path adjuster 90 includes a tip 901 and a shaft 902 having an outer diameter D slightly smaller than the inner diameter of the through hole W1a. Moreover, as shown in FIG. 7, the end surface of the front-end | tip part 901 is equipped with the radius R close | similar to the radius of the hole W2a which cross | intersects. Adjusting the size of the gap t ₂ between the ridge and the distal end portion 901 by forward and backward in the X direction by a moving device (not shown) the flow path adjuster 90.

W: Workpiece W1a: Through hole W2a: Through hole W1b: Blind hole Wb: Burr 1: Cross hole processing device 2: Tank 3: Pump 4: Pipe line 5: Inlet 6: Holding table 7: Collection line 8: Stirrer 9: Flow path adjuster 91: Tip portion 92: Hole 93: Shaft 94: Air pipe 10: Flow path adjuster driving device 11: Air source 12: Switching valve 13: Pipe line 30: Controller 31: Machining fluid control unit 32: flow path controller control unit

Claims (3)

In a workpiece having a first hole and a second hole intersecting the first hole, liquid is supplied to the opening of the first hole and at least one of the openings of the second hole. A crossing hole provided with a machining liquid injection device for injecting a machining liquid mixed with hard particles, deburring a burr generated at the ridgeline at the intersection of the first hole and the second hole, and chamfering the ridgeline In processing equipment,
A flow path adjuster disposed at the intersection;
A gap adjusting means for adjusting a gap between the ridge line and the flow path adjusting tool ;
The flow path adjuster is composed of an elastic body having pores therein,
The gap adjusting means is a cross hole machining apparatus comprising fluid supply means for filling the pores with fluid and expanding the flow path adjuster . The cross hole processing apparatus according to claim 1 , further comprising a control unit that controls the gap adjusting unit so as to adjust a gap between the ridge line and the flow path adjusting tool in accordance with an elapsed time of deburring. Using the cross hole machining apparatus according to any one of claims 1 to 2 , a ridgeline of a crossing portion of a workpiece having a first hole and a second hole intersecting the first hole. A method for processing a ridge line of an intersecting hole for deburring or chamfering the ridge line.

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