JPH0611932U - Integrated turning / ball burnishing tool - Google Patents

Abstract

(57) [Abstract] [Purpose] Turning the inner diameter surface of the workpiece with the same tool and plastic finishing by burnishing at the same time reduce the installation cost of the grinding machine and improve the turning efficiency. A ball burnishing integrated tool is provided. [Structure] A turning chip and a burnishing ball are installed on a single arbor at opposite positions of approximately 180 °, and the inner diameter surface of a workpiece is simultaneously machined for turning and burnishing by the reciprocating motion of the arbor. Configured the tool.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an integrated turning / ball burnishing tool that efficiently performs the required roughness by simultaneously performing turning / burnishing of the inner diameter surface of a work such as a gear or bush by reciprocating motion of the tool.

[0002]

[Prior art]

 For example, in planetary gears of reduction gears, bearings consisting of outer races and inner races have conventionally been fitted, and the required surface roughness for finishing the inner diameter of the gears was about 6 or 3S, so turning is sufficient. there were. Recently, however, so-called outer raceless bearings without outer races have been used in order to reduce the cost of bearings. For this reason, the required roughness for finishing the inner diameter of gears becomes even more severe, which is 2,2S. The conventional turning process alone cannot satisfy the required roughness, and a turning process and an additional grinding process are required.

[0003]

[Problems to be solved by the device]

 However, if an internal diameter grinding machine is added in addition to the conventional turning machine, not only will large investment be required, but also the two-step processing of turning and grinding will take longer processing time and there will be a problem in terms of processing efficiency.

This bill was made in order to solve the above-mentioned conventional problems, and when machining the inner diameter of a gear, there are two steps, namely, intermediate finishing by turning and finishing by burnishing in the reciprocating motion of one arbor. It is intended to provide a tool for integrated turning and ball burnishing that does not require a new additional grinder while simultaneously reducing the machining time.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention installs a turning tip and a burnishing ball burnishing at a position facing each other at about 180 ° on one arbor, and further turns the inner diameter surface of a workpiece by reciprocating the arbor. We provide an integrated turning / ball burnishing tool that solves the above-mentioned problems by simultaneously performing grinding and grinding.

[0006]

[Action]

 With the tool configured as described above, first adjust the position by raising the arbor so that the turning tip is in contact with the inner diameter surface of the workpiece, and then perform the inner diameter turning with the turning tip in the advancing process to the inner diameter surface of the workpiece. The height of the arbor is lowered with to adjust the position of the ball burnishing located at the position facing the turning tip so that it abuts the inner diameter surface of the work piece, and the inner diameter finishing process is performed by ball burnishing by the return process of the arbor. In this way, turning and grinding can be performed simultaneously by the reciprocating motion of one arbor.

[0007]

【Example】

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. 1 to 4 show a first embodiment of the present invention, and FIGS. 5 to 7 show a second embodiment. First, FIG. 1 shows an overall side view of the tool S ₁ of the first embodiment. The tool S ₁ has a turning tip 3 attached to the upper end of the arbor body 2 which is detachably attached to the tool magazine 1 by means of a mounting bolt 4 so as to be exchangeable. The finishing ball burnishing unit 5 is attached to the lower surface at an opposing position of °.

The above-mentioned ball burnishing 5 is originally known as a burnishing technique for pressing a hard ball on a work surface of a work with a high load. However, the present invention uses such a grinding technique as an inner diameter of the work. It was developed as an alternative to grinding, and is characterized in that it can be attached to a single work by combining it with a turning tip. Therefore, as shown in Fig. 3, the burnishing ball 6 is partially cut from the lower end. The ball 6 is loaded by the spring mechanism 10 that is rotatably attached by the holding member 7 so as to project, and further urges the backup roller 9 that is also rotatably supported by the shaft pin 8 at its back from the back. In this embodiment, the spring mechanism 10 is formed by stacking a plurality of disc springs 10a. The load is set to about kg. The ball burnishing 5 composed of these members is housed in the case 11, and the lid member 12 is attached to the upper surface of the case 11 in a closed room state with the bolts 13 to form a burnishing unit in the perforated portion of the arbor body 2 by the set bolt 13. The cartridge is inserted and set, and the cartridge can be exchanged by attaching and detaching the bolt 13.

A tool S having the above structure₁Turning procedures and burnishing procedures will be described with reference to FIG. The turning tip 3 is provided on the upper end of the tip, and the arbor body 2 having the finishing ball burnishing 5 at a position facing the turning tip 3 at approximately 180 ° is grasped by the grasping claws 15 of the power chuck 14 as shown in FIG. Inner diameter surface W of the gear W, which is the workpiece ₁ The turning tip 3 against the inner diameter surface W₁After moving to the upper position to set it to the machining position, the inner surface W₁While turning, let it pass to the opposite side of the gear W, and the lower ball burnishing unit 5 stops at the position where it passed to the opposite side of this gear W. Surface W₁The ball burnishing unit 5 is moved to the inner surface W₁While the ball 6 is rotating, the ball 6 is finished, is sequentially retracted, passes again to the front side of the gear W, and returns to the initial set position. The reciprocating operation of the arbor main body 2 becomes an operation path as shown in (b), and the reciprocating motion simultaneously performs turning and burnishing.

Next, a second embodiment of the present invention will be described with reference to FIGS. In the tool S ₂ of this embodiment, a turning tip 17 is exchangeably attached to the upper end of the arbor body 16 detachably attached to the tool magazine 1 by a retaining eccentric shaft 18, and A ground ball burnishing unit 19 is attached to a lower surface portion which is located at an angle of about 180 ° with respect to 17. As described above, the turning tip 17 and the ball burnishing 19 are attached to the arbor body 16 at vertically opposed positions. The configuration is the same as that of the first embodiment described above.

In the present embodiment, particularly, in the ball burnishing 19, the burnishing ball 20 applies the load to the inner diameter surface W ₁ of the gear W which is the workpiece during the finishing work, and the arbor body 16 is fixed to the fixed arbor portion 16a. The swing arbor portion 16b is divided into two parts, and both arbor portions 16a and 16b are jointly connected by a support pin 21. The swing arbor portion 16b is supported by the support pin 21 as a fulcrum with respect to the axis (x). A stopper 28 is attached to the upper surface of the fixed arbor portion 16a by a bolt 29 so as to be swingable downward and to prevent swinging upward by an axis (x) for fixing during turning. .

The ball 20 of the ball burnishing unit 19 attached to the front lower surface of the swing arbor portion 16 b swingably supported in this way is rotatable by a holding member 22 so as to partially project downward. Further, a backup roller 24 is mounted on the back of the ball 20, and the back of the ball 20 is rotatably supported by a shaft pin 23. The ball burnishing unit 19 thus constructed can be attached / detached by attaching / detaching the set pieces 25, 26 to / from the swing arbor portion 16.

On the other hand, a spring mechanism 27 for applying a load to the burnishing ball 20 is provided between the rear end portion of the swing arbor portion 16b and the fixed arbor portion 16a. In the present embodiment, this spring mechanism 27 is composed of a plurality of layers of disc springs 27a fitted in the holes formed in the fixed arbor 16a, and a pressing member 27b which also serves as a lid swings above the disc springs 27a. The moving arbor portion 16b is urged to push up the rear end portion of the moving arbor portion 16b, whereby the swinging arbor portion 16b applies a high load to the burnishing ball 20 with the support pin as a fulcrum. The ball 20 sequentially burnishes the gear inner diameter surface W ₁ with this high pressing force while rotating. In the figure, 30 is an oil-lubricating hose, and 31 is an air broth, which is also attached to the above-described first embodiment, although not shown. Further, the procedure of turning and burning by reciprocating movement of the tool S ₂ according to this embodiment is the same as that of the above-described first embodiment, and the description thereof will be omitted.

In the first and second embodiments, the gear has been described as a work, but it is needless to say that the work is not limited to a gear, and is suitable for a work to be subjected to turning and grinding of an inner diameter surface and a work work range. Is wide. The turning, ball burnishing, and dual-purpose tools according to the present invention are intended to perform both of these processes at the same time.However, even if the workpiece is to be turned or any other Needless to say, it can be used as a turning tool or a burnishing tool depending on the purpose.

[0015]

[Effect of device]

 Since the present invention is configured as described above, it is not necessary to provide a grinding machine in addition to each turning machine, and not only space is saved, but also facility costs are greatly reduced. Since it is possible to perform both turning and burnishing, the processing time is halved, and the effect of reducing the lining cost is particularly great in the mass production process. Furthermore, the surface hardness is higher than that of grinding and the residual reaction of compression is obtained, so that the functional life of the product can be expected to be extended.

[Brief description of drawings]

FIG. 1 is a side view of a tool showing a first embodiment of the present invention.

FIG. 2 is a front view of a tool showing a first embodiment of the present invention.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4A shows turning of the inner diameter surface of the gear in the same embodiment,
FIG. 5 is a diagram showing a simultaneous process of ball burnishing, and FIG.

FIG. 5 is a side view of a tool showing a second embodiment of the present invention.

FIG. 6 is a bottom view of a tool showing a second embodiment of the present invention.

7 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

S ₁ turning ball burnishing integrated tool 2 arbor body 3 turning tip 5 ball burnishing unit 6 burnishing ball 9 backup roller 10 spring mechanism 10a disc spring 11 Case W gear W ₁ gear inner surface S ₂ a second embodiment of the first embodiment Tool for integrated turning and ball burnishing 16 Arbor body 16a Fixed arbor 16b Swing arbor 17 Turning tip 19 Ball burnishing 20 Burnishing ball 24 Backup roller 27 Spring mechanism 27a Disc spring 28 Stopper

Claims (4)

[Scope of utility model registration request] 1. A turning tip and a burnishing ball are installed on a single arbor at opposing positions of approximately 180 °, and the inner diameter surface of a workpiece is simultaneously turned and burnished by the reciprocating movement of the arbor. Tool for integrated turning and ball burnishing characterized by doing so. 2. The integrated turning / ball burnishing tool according to claim 1, wherein the ball burnishing unit has a cartridge structure, and the ball burnishing is attached to and detached from the arbor. 3. An integrated turning / ball burnishing tool, wherein the burnishing ball is biased by a spring mechanism. 4. An integrated turning / ball burnishing tool, wherein the spring mechanism is composed of a plurality of layers of disc springs.