JPH0639607A - Compound machining tool for floating cutting and roller burnishing - Google Patents

Abstract

PURPOSE:To provide a precision machining tool, with which the pipe material pressure-welding and the honing or the like is not required and the working process and the working time are shortened and a manufacturing cost of a pipe having an inner diameter at high products accuracy is reduced remarkably. CONSTITUTION:A floating cutting tool 2 for rough cutting and finish cutting and a roller burnishing tool 3 are connected internally in the axial direction to form a compound machining tool for floating cutting and roller burnishing so that when a connecting tool is rotated for movement inside of a hole of a pipe to be processed, the rough cutting and the finish cutting is performed by the floating cutting tool 2 at the time of going, and the flat and smooth and abrasion-proof finish is performed by the roller burnishing tool 3 at the time of return.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precision machining tool for the inner surface of a pipe hole, and more specifically, it is a machine tool in which a floating cutting tool and a roller burnishing tool are integrally connected to each other by rotating the pipe hole for machining. Then, the present invention relates to a combined machining tool of floating cutting and roller burnishing in which the inner surface is subjected to a floating cutting process in the forward direction and a roller burnishing process is performed in the return direction to finish the surface smoothly and wear-resistant.

[0002]

2. Description of the Related Art Conventionally, the problems to be solved by the invention
A high-precision inner diameter pipe can be manufactured by roughening the pipe hole of a relatively thick workpiece pipe with a boring tool, or after rolling the pipe material, and then using a rotating whetstone. The method of finishing by honing is adopted. However, with such a method, it is difficult to rough and finish a thin and long pipe in the boring process, and the rolling process of the pipe material is not easy, and the honing process takes a long time. There was a problem that it was necessary. Further, when abrasion resistance is required for the inner surface of the pipe depending on the use of the pipe, the surface hardening treatment is further secondarily performed, which causes a problem that the processing cost becomes high.

[0003]

In order to solve the conventional problems, the present invention focuses on the respective advantages of the floating cutting process and the roller burnishing process, and integrally connects the floating cutting process tool and the roller burnishing tool. By rotating and moving in the pipe hole of the work piece, the inner surface is subjected to floating cutting processing, and the return is roller burnishing processing, which eliminates the need for roughing due to boring, pipe material rolling processing and honing processing, resulting in high efficiency. An object of the present invention is to provide a new combined machining tool of floating cutting and roller burnishing, which can be finished smoothly and wear-resistant. That is, the present invention is a precision machining tool for an inner surface of a pipe hole, which is formed by integrally coupling a floating machining tool for roughing and finish cutting and a roller burnishing machining tool in an axial direction, and the coupling tool is a pipe hole. When it is rotated and moved in the inside, it is rough cut and finish cut by the floating cutting tool on the way, and the floating cutting is characterized by the structure that the return can be finished smoothly and wear-resistant by the roller burnishing tool. It is a composite processing tool for roller burnishing.

Further, in the combined machining tool of floating cutting and roller burnishing according to the present invention, a plurality of roughing tools are arranged on the outer periphery of the tip of the floating cutting tool, and the biasing means can be released in a staggered manner with the roughing tools. Is installed in the radial direction, and a finishing guide tool that can expand and contract along the inside diameter of the pipe along with the floating guide is arranged on the rear outer periphery and expansion and contraction can be adjusted orthogonally to the floating guide. A fixed guide is provided, and a swingable screw guide that also serves as a guide and oil feed is fitted on the outer periphery of the rear end to form a front floating cutting tool. Further, in the combined machining tool of floating cutting and roller burnishing according to the present invention, a plurality of burnishing rollers are rotatably attached to the outer periphery of the rear roller burnishing machining tool, and the inner ring of the machining tool is reversed in the forward direction. Characterized by a configuration in which a tapered burnishing method roller is formed on the inner ring and is rolled on the inner ring, and the diameter is reduced when the processing roller is in the forward direction and is increased in the backward direction. To do. Floating cutting is a processing method that finishes and cuts the inner surface of the pipe to be processed with a finishing tool in a floating state, not fixed, and roller burnishing with high accuracy. This is a processing method in which the finished roller is pressed onto the cutting surface and plastically deformed to finish smooth and wear-resistant.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a combined machining tool for floating cutting and rollers according to the present invention will be described below with reference to the drawings. Figure 1
FIG. 2 is a vertical cross-sectional view of the combined floating cutting and roller machining tool of the present invention, FIG. 2 is a front side view of the floating cutting machining tool (viewed in the direction of arrow A in FIG. 1), and FIG. 3 is a cross-section of the floating guide portion. It is a figure (BB sectional drawing of FIG. 1). FIG. 4 is a sectional view of the screw guide portion (C to C in FIG. 1).
5 is an external view of the screw guide (a view taken in the direction of arrow D in FIG. 4), and FIG. 6 is an overall explanatory view of the workpiece pipe hole inner surface processing apparatus. In the figure, 1 is a composite machining tool of the present invention, 2 is a floating machining tool,
3 is a roller burnishing processing tool, 4 is a tip member, 5 is a roughing tool, 6 is an adjuster guide, 7 is a mounting groove, 8 is a mounting groove, 9 is a guide hole, 10 is a leaf spring, 11 is a pin, and 12 is a pin. Ball, 13 is a central hole, 14 is a moving shaft, 15 is a slide cam, 16 is a concave cam, 17 is a rear member, 18 is a rear member, 18 is a floating guide, 19 is a square hole, 20a and 20b are upper and lower parts of the adapter, and 21 is finish cutting. Tool, 22 is a guide member,
Reference numeral 23 is an inner collar, 24 is a contact bolt, 25 is a tapered groove, 26 is a fixed guide, 27 is a hole portion, 28 is a receiving pin, 29 is a tension spring, 30 is a screw guide, 30a is a slot, 31 is a receiving nut, 32 is a push nut, 33 is a bush, 34 is an oil groove, 35 is a liner, 3
6 is a key, 37 is a burnishing tool body, 38 is a bearing,
39 is an inner ring, 40 is an outer race, 41 is a roller, 42 is a thrust bearing, 43 is a nut, 4
4 is a spring, 45 is a connecting collar, 46 is a spring, 47 is a processing pipe, 48 is a processing machine, 49 is a boring bar, 50 is an operating shaft, 51 is a table, 52 is a pipe tip holding base, 53 is a pipe rear end holding Pedestal, 54 a front holder, 55 a rear holder, 56 a boring bar receiver, 57
Is an oil injection port, 58 is an oil drain port, 59 is a screw connection part, and 60 is a boring bar insertion part.

In the combined floating cutting and roller burnishing tool 1 according to the embodiment of the present invention, the front floating cutting tool 2 and the rear roller burnishing tool 3 are axially screwed together by a screw joint 59. ing.
The composite machining tool 1 has a pipe 47 in a dedicated machining machine 48.
Used for precision finishing of the inner surface of the hole. Further, the boring bar insertion portion 60 of the composite machining tool 1 is inserted into the tip of the boring bar 49, and is rotated in the R direction in the hole of the pipe 47 in the G direction (forward direction) and the H direction (return direction). Although the work is carried out by moving, the forward is rough-worked by the roughing tool 5 at the tip of the floating cutting tool 2, then the finish-cutting is done by the finish-cutting tool 21 behind it, and the return is the roller-burnishing tool 3 Roller burnishing is performed by the roller 41, and the finish is smooth and wear resistant. The floating cutting tool 2 is basically formed by screwing a tip member 4 to the front surface of a cylindrical rear member 17. Three roughing tools 5 are attached to the outer circumference of the tip of the tip member 4.
It is fixed to the mounting groove 7 with a screw at a pitch of 20 °. And each has a rake face. Further, guide holes 9 are bored in three radial directions, which are staggered from the roughing tool 5, and mounting grooves are axially formed in the heads of the guide holes 9, respectively, and each of the guide guides 9 is made of gun metal. 6 is involved. The rear part of the adjust guide 6 is locked by a locking bolt, and the front part thereof is urged in the radial direction by the urging force of the leaf spring 10 embedded in the guide hole 9. Since the rear lower surface of the adjust guide 6 is slightly scraped rearward to form a tapered surface (not shown),
The urging force of the leaf spring 10 allows the adjustment guide 6 to swing in the radial direction.

On the other hand, a center hole 13 is bored in the center of the tool 2, and a slide cam body 15 is slidably fitted in the center hole 13. The slide cam body 15 is connected to the tip of the moving shaft 14 which is inserted through the center and reciprocates in the axial direction. Further, a concave cam 16 is provided on the outer periphery of the slide cam body 15. The ball 12 rides on the outer peripheral surface in the state of FIG. 1, but it is likely to drop at the concave cam 16 due to the axial movement. Has become. Ball 12 is cam body 1
When the vehicle rides on No. 5, the upper leaf spring 10 is compressed and urged via the pin 11, but when the leaf spring 10 is dropped onto the concave cam 16, the leaf spring 10 is released from compression and thus the urging is released. A butting collar 45 is connected to the rear end of the moving shaft 14,
A hydraulic cylinder with the axis of the boring bar 49 in the front-back direction.
The movable shaft 50 is brought into contact with the movable shaft 50 (not shown). When the operating shaft 50 moves forward, the moving shaft 14 moves forward and the slide cam body 15 moves forward to drop the ball 12 on the concave cam 16 and release it. Conversely, when the operating shaft 50 retracts, the spring 46
As a result, the moving shaft 14 retracts, and the ball 12 rides on the cam body 15 to urge the leaf spring 10. Bush 3
3, the front and rear bearings 38, 38 are for holding the moving shaft 14.

A square hole 19 is diametrically penetrated to the front side of the rear member 17, and adapters 20a and 20b, which are bisected in the vertical direction, are slidably fitted in the square hole 19. . Further, a finishing shaving tool 21 and a gun metal guide member 22 are provided on the respective tips of the adapters 20a, 20b, that is, on the outer peripheral side.
Are mounted side by side to form the floating guide 18. Further, contact bolts 24 are screwed to the upper and lower portions 20a and 20b of the adapter in the direction of the center, respectively, and a rectangular inner collar 23 attached to the moving shaft 14 at the center.
The upper and lower surfaces are pulled by a tension spring 29 and are urged and abutted in the diameter reducing direction. The spring 29 has a hole 27 formed in each of the adapters 20a and 20b, and a receiving pin 2
8 is planted and suspended. A pair of gun metal fixed guides 26 are formed on the outer peripheral surface of the floating guide 18 at right angles to the floating guide 18.
Are arranged on the taper groove 25 so as to be adjustable in expansion and contraction. Further, a screw guide 30 made of a gunmetal ring is fitted to the taper portion on the outer periphery of the rear end of the rear member 17 so as to be expandable / contractible by sandwiching a receiving nut 31 and a push nut 32. The screw guide 30 is provided with one slot 30a. Further, four oil grooves 34 are formed on the outer peripheral surface in the left helical direction with respect to the rotation direction (R direction).
In the above, the cutting fluid supplied from the oil supply port 57 toward the oil discharge port 58 side is positively sent out to the front side roughing tool 5 and the finishing cutting tool 21 side, and also serves as the original guiding role. The setting angle of the oil groove 34 is preferably 15 to 60 °, but in this example, it is set to 45 °. A liner 35 made of a hard alloy having high wear resistance is fixed to the outer peripheral guide surface of the screw guide 30. Further, 36 is a key, and P indicates the feeding direction of the cutting fluid.

An inner ring 39 is fixed to the outer circumference of a cylindrical burnishing tool body 37 of the rear roller burnishing tool 3. Further, a cylindrical outer race 40 is attached so as to cover the inner ring 39. The outer race 40 is a thrust bearing 42,
It is held so as to be slightly movable in the axial direction via a nut 43 and a spring 44. Further, fitting holes for a plurality of rollers 41 are formed in the outer peripheral surface of the outer race 40 in parallel with each other at an equal pitch. Further, the outer circumference of the inner ring 39 is formed in a reverse taper in the forward direction (G direction), and is tapered (with respect to the G direction) inserted into the fitting hole of the outer race 40 on the tapered surface. Roller 4 for burnishing
1 is rollingly abutted. Therefore, when the roller burnishing processing tool 3 is in the forward direction (G direction), the processing roller 4 is
When 1 contacts the inner surface of the hole of the pipe 47 and receives resistance, it slides on the reverse taper surface of the inner ring 39 to compress the spring 44 and reduce its diameter. Next time when returning (H direction),
The reverse taper surface of the inner ring 39 is slid in the radial direction, and the cut surface is compacted by rolling to finish it smoothly. Since the composite machining tool 1 of the present invention has the above-described configuration, when it is rotationally moved within the hole of the pipe 47 for machining, the forward (G direction) can be roughed and finish-cut by the floating machining tool 2, and returned. In the (H direction), the roller burnishing tool 3 enables smooth and wear-resistant compaction finish.

[0010]

As described above, according to the combined machining tool of floating cutting and roller burnishing of the present invention, when the boring of the workpiece pipe is performed, the floating cutting tool performs roughing to finish cutting. Finely cut with a roller burnishing tool at the time of returning to finish the surface smoothly and wear-resistant by rolling the fine cutting surface, so that it is possible to complete from roughing to precision finishing in one reciprocating stroke. The precision machining efficiency of the inner surface of the pipe can be dramatically improved. In the prior art, a high-precision inner diameter pipe was manufactured by finishing and honing a pipe to be processed roughened by a pipe rolling or boring tool. No need for machining or honing
As a result of shortening the working process and working time, the manufacturing cost of the product high precision inner diameter pipe can be significantly reduced.

Further, according to the present invention, the floating cutting process is performed at the time of the forward movement, and the roller burnishing process is performed at the time of the backward movement so as to divide the machining resistance into two. The problem that the workpiece pipe fastened to the processing machine is swung around does not occur, and the required power of the processing machine can be reduced.
In the above, in particular, a floating cutting tool equipped with a roughing tool with an urging bias guide attached to the tip and a finishing tool with a floating guide behind it are The adjusted guide swings to follow the inner surface of the pipe hole, and the upper and lower adapters of the slidable floating guide expand and contract to follow the inner surface of the pipe hole, enabling consistent roughing to fine finishing. . Furthermore, in the case where a screw guide is installed around the rear end of the floating cutting tool, cutting oil is positively sent to the roughing tool and the finishing tool side to wash out the shavings, resulting in a beautiful cutting surface. The finishing effect of the resulting roller burnishing process can be doubled.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a combined machining tool for floating cutting and roller burnishing according to an embodiment of the present invention.

FIG. 2 is a front side view of the floating cutting tool (a view taken in the direction of arrow A in FIG. 1).

FIG. 3 is a sectional view of a floating guide portion (B in FIG. 1).
To B cross section).

FIG. 4 is a sectional view of a screw guide portion (C to C in FIG. 1).
It is a sectional view).

FIG. 5 is an external view of a screw guide (a view taken in the direction of arrow D in FIG. 4).

FIG. 6 is an overall explanatory view of a workpiece pipe hole inner surface processing apparatus.

[Explanation of symbols]

1 Combined processing tool of floating cutting and roller burnishing 2 Floating cutting processing tool 3 Roller burnishing processing tool 4 Tip member 5 Roughing tool 6 Ajist guide 7 Mounting groove 8 Mounting groove 9 Guide hole 10 Leaf spring 11 Pin 12 Ball 13 Center hole 14 moving shaft 15 slide cam body 16 concave cam 17 rear member 18 floating guide 19 square hole 20a adapter upper 20b adapter lower 21 finishing tool 22 guide member 23 inner collar 24 contact bolt 25 taper groove 26 fixed guide 27 hole 28 receiving pin 29 Tension spring 30 Screw guide 30a Slot 31 Receiving nut 32 Push nut 33 Bushing 34 Oil groove 35 Liner 36 Key 37 Burnishing tool body 38 Bearing 39 Inner ring 40 Outer 41 Roller 42 Thrust bearing 43 Nut 44 Spring 45 Coupling collar 46 Spring 47 Processing pipe 48 Processing machine 49 Boring bar 50 Working shaft 51 Table 52 Pipe tip holding table 53 Pipe rear end holding table 54 Front holding tool 55 Rear holding tool 56 Boring bar receiver 57 Lubrication port 58 Oil drainage port 59 Screw connection part 60 Boring bar insertion part

Claims (3)

[Claims] 1. A precision machining tool for the inner surface of a pipe hole, comprising:
The floating cutting tool for roughing and finish cutting and the roller burnishing processing tool are integrally formed in the axial direction, and when the connected tool is rotationally moved in the pipe hole for machining, the forward cutting tool is used. This is a combined machining tool of floating cutting and roller burnishing, characterized by a structure in which roughing and finish cutting are performed by the above, and the return is finished with a roller burnishing processing tool in a smooth and wear-resistant manner. 2. A plurality of roughing tools are arranged on the outer periphery of the tip of the floating cutting tool, and an alternate guide is provided alternately with the roughing tools and provided with releasable biasing means in the radial direction. Installed on the outer periphery of the rear of the floating guide along with the floating guide, which is capable of expanding and contracting freely, and is orthogonal to the floating guide.
2. A fixed floating guide that is adjustable in expansion and contraction is provided, and an expandable and contractible screw guide that also serves as a guide and oil feed is fitted on the outer periphery of the rear end to form a front floating cutting tool. Combined processing tool of floating cutting and roller burnishing described. 3. A rear roller burnishing tool is provided with a plurality of burnishing rollers extensible and contractible on its outer periphery, and an inner ring of the tool is formed in a reverse taper in the forward direction, and the inner ring is formed on the inner ring. The taper burnishing method roller is rolled, the diameter is reduced when the processing roller is in the forward direction, and the diameter is increased when the processing roller is in the return direction. Combined processing tool for floating cutting and roller burnishing.