JP2008012617A - Method of chamfering opening rim of hole to be worked between juxtaposed workpieces - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an advantageous and simple method for chamfering an opening rim of a hole to be worked facing a gap between juxtaposed workpieces. <P>SOLUTION: In this chamfering method, a plurality of workpieces 11, 21 with coaxially located circular holes 12, 22 worked are juxtaposed, and opening rims 12B, 22A of the worked holes on a side facing inter-workpiece gaps S<SB>12</SB>, S<SB>23</SB>formed between the workpieces are chamfered by a chamfering cutter 3 driven to rotate by a rotary shaft 2. The rotary shaft and the chamfering cutter are detachable from each other. When the opening rim of the worked hole facing the inter-workpiece gap is chamfered, the chamfering cutter is removed from the rotary shaft and inserted into the gap. Then, the chamfering cutter is mounted at the tip of the rotary shaft inserted from the hole, and the cutter is pressed against the opening rim of the hole to have the rim chamfered. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for chamfering work holes formed in side-by-side workpieces, and more particularly, a hole opening on the side facing a gap between side-by-side work pieces (gap between materials). The present invention relates to an edge chamfering method.

  For example, when a member having a pivot shaft on one end side, such as a hydraulic cylinder or a pneumatic cylinder, is pivotally supported, the pivot shaft is pivotally supported by a pair of side-by-side support members (brackets). In this case, a so-called “burr” is generated at the opening edge of the circular hole processed by the drill.

Conventionally, the “burrs” are formed by rotating the opening edges 112A and 122B on one surface side (open surfaces 111A and 121B side) of the processing holes 112 and 122 formed in the workpieces 111 and 121 arranged side by side as shown in FIG. chamfering by the chamfering cutter 103 of the formula while (deburring) to burr generated at the opening edge 112B, 122A of the processed hole facing wood between the gap S ₁₁₂ between the workpiece 111 and 121 (so-called "back flash" ) Was finished with a file 133 or a ball grindstone 143 as shown in FIG. 6 (A) or FIG. 7 (A).

  By the way, in the file processing as shown in FIG. 6 (A), since it is processing by the linear motion of the file, the file mark 133A as shown in FIG. 6 (B) remains on the opening edge of the hole to be processed, and FIG. Even in the case of ball grind processing as shown in A), as shown in FIG. 7B, a specific filing mark 143A remains due to the contact of the side peripheral surface of the ball grind against the opening edge of the hole to be processed. In addition to the problem, there was a problem that a relatively long machining time (4 to 5 minutes per one place) was required for the chamfering work.

  In addition, in the range investigated by the inventors of the present application, it has not been possible to find any document that discloses any effective processing method for the “back burr” generated at the opening edge of the hole to be processed between the parallel workpieces.

  The present invention has been made on the basis of the technical background as described above, and intends to propose an advantageous and simple chamfering method for an opening edge of a hole to be processed between parallel workpieces.

  The chamfering method of the opening edge of the hole to be processed between the side-by-side workpieces according to the present invention is such that a plurality of workpieces each having a circular hole to be coaxially positioned are arranged side by side. In this state, the chamfering method is a chamfering method in which the opening edge of the hole to be processed facing between the material gaps formed between the materials to be processed is chamfered by a chamfering cutter that is rotationally driven by a rotation shaft. The rotating shaft and the chamfering cutter are detachable from each other, and the chamfering cutter is inserted into the gap between the materials when chamfering the opening edge of the hole to be processed facing between the material gaps. Then, the chamfering cutter is attached to the tip of the rotating shaft inserted from the processing hole, and the chamfering cutter rotated by the rotating shaft is pressed against the opening edge of the processing hole. The opening edge is chamfered.

  As described above, the chamfering method of the opening edge of the hole to be machined between the parallel workpieces of the present invention is such that the chamfering cutter for chamfering can be attached to and detached from the rotary shaft for rotation driving. When chamfering the opening edge of the hole to be processed facing the material gap between workpieces, insert a chamfering cutter between the material gaps between the workpieces, and then insert the chamfering cutter from the workpiece hole of the workpiece. By mounting it at the tip of the inserted rotating shaft, the chamfering cutter rotates oppositely from the axial direction toward the opening edge of the hole to be processed (facing between the material gaps) between the workpieces side by side. As a result, it is possible to perform the same chamfering process on the opening edge of the hole to be processed facing between the material gaps as in the case of the opening hole on the open side. No chamfering, compared to conventional A short time (e.g., in person skilled in the order of 5 to 10 seconds) Te has the effect of obtaining performed.

  Next, the chamfering method according to the embodiment of the present invention will be described in more detail with reference to FIGS. 1 to 4. FIG. 4 shows an electric motor that can be used in the chamfering method according to the embodiment of the present invention. The chamfering machine shown in the figure is gripped by the chuck 4 of the hand-operated electric chamfering machine main body 1. The rotary shaft 2 is rotated and driven, and the chamfering cutter 3 is detachably attached to the tip of the rotary shaft 2. The tip 2a of the rotating shaft 2 has a regular hexagonal cross section, and this is removably fitted with a receiving hole 3a of the same size and shape (regular hexagonal) formed in the center of the chamfering cutter 3. It is supposed to do. On the other hand, the base end 2b of the rotating shaft 2 held by the chuck 4 is circular in this embodiment. This is because a large rotational reaction force may be applied to the rotary shaft 2 when chamfering the opening edge of the hole to be processed by the chamfering cutter 3, thereby generating a large reverse rotational force in the chamfering machine body 1 (that) This prevents excessive chamfering force from being applied to the arm of the holder of the chamfering machine. That is, even when an excessive rotational reaction force is applied to the rotary shaft 2 from the chamfering cutter 3 side, the base end portion 2b of the rotary shaft 2 has a circular shape (round bar shape). "Slip" occurs between the chuck 4 and the chuck 4, and an excessive rotational reaction force is prevented from propagating to the chamfering machine body 1 side. The chamfering method of the present invention is not limited to the case of using a hand-held chamfering machine as shown in the illustrated embodiment, but can also be performed using a stationary machine tool such as a drilling machine, In this case, since it is not necessary to consider the reverse rotational force due to the rotating shaft 2, it is not necessary to make the base end portion 2b of the rotating shaft 2 more circular.

  There is no limitation in particular in the chamfering cutter used with the chamfering processing method of this invention. That is, the material, shape, diameter, axial dimension, etc. of the cutter blade, the material of the work material, the diameter of the work hole, the gap interval between the work materials, etc. can be freely selected. The chamfering method of the present invention can be applied to a material of the workpiece such as a steel material, an alloy material, or a plastic material such as acrylic.

  When carrying out the chamfering method of the present invention, if the gap between workpieces is wide enough to insert fingers, insert and remove the chamfering cutter into the gap between workpieces (gap between workpieces) with fingers. However, when the gap between the material gaps is narrow enough to prevent fingers from entering, it is preferable to use a separate holder so that the chamfering cutter can be taken in and out of the gap between the materials.

Next, the specific procedure of the chamfering method for the hole opening edge to be processed according to the embodiment of the present invention will be described. FIGS. 1 (A), (B), and (C) are related to the embodiment of the present invention. An example for carrying out the chamfering method of the opening edge (12B, 22A) of the hole to be processed between the workpieces 11 and 21 arranged side by side is shown. FIG. 1A shows one of the processing holes 12 of the first processing material 11 among the side-by-side processing materials 11 and 21 having the processing holes (12, 22) formed coaxially. opening edge 12A (the opening edge of the open side opposite to the opening edge 12B facing wood between the gap S ₁₂ formed between the workpiece 11 and 21 of collateral) shows a situation in which chamfering. In the state shown in FIG. 1A, the chamfering cutter 3 driven to rotate by the rotary shaft 2 is simply pressed against the (open side) opening edge 12A of the first hole 12 to be processed. Chamfering can be performed on the opening edge 12A on the open side of the processing hole 12.

  Such a chamfering operation on the opening edge 12A of the hole to be opened on the side may be performed by the same method as the conventional method, and this point is the second processing on the other (second) workpiece 21. The same applies to the case of chamfering the hole opening edge 22B to be processed in which the side of the opening edges 22A and 22B of the hole 22 is open (see FIG. 2A).

Next, FIGS. 1B and 1C show the holes 22 to be processed (second holes to be processed) 22 formed in the second workpiece 21 of the workpieces 11 and 21 arranged side by side. one of the opening edge (opening edge of the gap S ₁₂ side facing the timber between the gap S ₁₂ formed between the workpiece 11 and 21 of collateral) 22A shows the procedure for chamfering. That is, in this case, after removing the chamfering cutter 3 from the tip of the rotating shaft 2 of the driving means 1 such as a hand-operated chamfering machine body, the gap between the pair of workpieces 11 and 12 arranged side by side (material) during gaps) placed in S ₁₂ (FIG. 1 (B)), then the tip of the rotary shaft 2 inserted toward the same chamfer cutter 3 from the workpiece hole 12 of the first workpiece 11 to the timber between the gap S ₁₂ Refit to. Then, if you make that chamfered cutter 3 to its later rotate to the second opening edge (opening edge facing the timber between the gap S ₁₂ side) of the gap side of the workpiece 21 side of the work hole 22 22A, between wood for the processed hole opening edge 22B of the workpiece hole opening edge 12A or the second workpiece 21 in the first workpiece 11 which is also described (above for opening edge 22A of the gap side facing the gap S ₁₂ side Good chamfering can be performed. Incidentally, two of the processed hole opening edge 12B facing wood between the gap S _12, also chamfering for the first workpiece 11 side of the workpiece hole opening edge 12B of 22A, previously in FIG. 1 (B ), (C) can be used in the same procedure as described above. That is, in this case, after removal of the chamfer cutter 3 from the front end of the rotary shaft 2 of a drive unit 1, which was placed in the gap (materials between the gap) S ₁₂ between the pair of collateral to the workpiece 11, 12 (FIG. 2 (B)), then re-attached to the tip of the rotary shaft 2 inserted toward the same chamfer cutter 3 from the workpiece hole 22 of the second workpiece 21 to wood between the gap S _12. Then, if you make that chamfered cutter 3 to its later rotated in a first workpiece 11 side of the first opening edge of the gap side of the processed hole 12 (opening edge facing the timber between the gap S ₁₂ side) 12B , be carried out (similar when for the processed hole opening edge 22A of the second workpiece 21 described earlier) good chamfering also the opening edge 12B of the gap side facing the timber between the gap S ₁₂ side it can.

  The method of the present invention can be carried out not only when there are two workpieces arranged side by side but also when there are three or more workpieces.

FIG. (B) and (C) show an example in which there are three workpieces arranged side by side. In this example, 2 formed between the three workpieces 11, 21, 31. one of the wood between the gap S _12, 4 single workpiece hole opening edge facing the _{S 23 (12B, 22A, 22B} , 32A) FIG earlier in the 1 (B), (C) and FIG. 2 (B), (C) The chamfering process can be performed in the same manner as described above. However, in the example of FIG. 3, the chamfering cutter 3 can reach the hole opening edge 11 </ b> B of the first workpiece 11 and the hole opening edge 32 </ b> A of the third workpiece 31. The length of the rotating shaft 2 is selected.

It is explanatory drawing of the work procedure of the chamfering processing method concerning the Example of this invention. It is explanatory drawing of the other work procedure of the chamfering method shown in FIG. It is explanatory drawing of the work procedure of the chamfering processing method concerning the other Example of this invention. It is decomposition | disassembly explanatory drawing of the chamfering processing machine which can be used with the chamfering processing method of this invention. It is explanatory drawing of the chamfering processing method performed conventionally. It is explanatory drawing of the other chamfering processing method performed conventionally. It is explanatory drawing of the further another chamfering processing method currently performed conventionally.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 is a drive means, 2 is a rotating shaft, 3 is a chamfering cutter, 4 is a chuck | zipper, 11,21,31 is a processed material, 12,22,32 is a processed hole, 12A, 12B, 22A, 22B, 32A, 32B Is the opening edge of the hole to be processed, and S ₁₂ and S ₂₃ are inter-material gaps between the workpieces.

Claims (1)

In a state where a plurality of workpieces (11, 21,...) In which circular workpiece holes (12, 22,...) That are coaxially positioned with each other are formed side by side, the workpieces (11, 21 ..) wood between the gap formed between (S _12, S ₂₃ ··) in facing sides the opening edge of the workpiece hole (12, 22 ...) (12B, the rotation shaft 22A ...) A chamfering method for chamfering by a chamfering cutter (3) driven to rotate by (2), wherein the rotating shaft (2) and the chamfering cutter (3) are detachable from each other, and the gap between the materials (S _12, S ₂₃ · ·) in facing the workpiece hole opening edge (12B, 22A · ·) in chamfering processing, the chamfering cutter (3) the material between the gap (S _12, S ₂₃ · · ), And before inserting from the hole to be processed (12, 22,...) The chamfering cutter (3) is mounted on the tip of the rotating shaft (2), and the chamfering cutter (3) driven to rotate by the rotating shaft (2) is connected to the opening edge (12B, 22A,. A chamfering method for chamfering a hole opening edge between parallel workpieces, wherein the chamfering process is performed on the opening edge of the hole to be pressed.

Images