JP3368831B2 - Processing device and processing method for test piece - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for processing a test piece used for testing mechanical and physical properties such as a tensile test of a metal material.

[0002]

2. Description of the Related Art Conventionally, as a processing apparatus or processing method for a round bar-shaped test piece, when a material to be measured is a base material of a thick plate, a predetermined position of the base material is cut out with a saw board or the like. After cutting out an elongated rectangular columnar body with a jig, the columnar body was processed into a round bar-shaped test piece by a lathe.

[0003]

The columnar body cut out by the above-mentioned method has a square cross section and its surface cannot be made smooth, depending on the accuracy of the cutting jig. When lathe-processing a long and slender columnar body with low accuracy, it is difficult to center it with a chuck and it takes time to work.
A test piece that is generated by connecting cutting chips generated by cutting with a cutting tool, which entangles and scratches the test piece during cutting, and causes large variations in dimensional accuracy due to heat generated during cutting. There was a problem such as deformation of the blade and occurrence of cutting scratches.

An object of the present invention is to provide a processing apparatus and a processing method capable of obtaining a test piece having good dimensional accuracy and free from processing scratches with good workability.

[0005]

In order to solve the above problems SUMMARY OF THE INVENTION The present invention, in the processing apparatus of a round bar specimens used to test the mechanical and physical properties, columnar to be processed into the test piece wherein a workpiece fixing means for fixing both ends of the workpiece, a tool rotating means for rotating the cutting tool having a cutting edge in a substantially cylindrical outer surface, said cutting tool being pressed by the tool pressing means Tool moving means for moving along the axis extending in the longitudinal direction of the workpiece, and the cutting tool for rotating the cutting tool around the axis.
Tool pressing means for pressing the cutting edge of the cutting member to the workpiece,
A workpiece to be rotated that rotates the workpiece around its longitudinal axis.
And a working member rotating means .

The work member fixing means fixes, for example, clamps, both end sides of the work member to be processed into a test piece. Since both ends are fixed, even a slender columnar body with low accuracy can be fixed quickly, and since it is not cantilevered as in lathe processing, it does not run out. The tool rotating means rotates a cutting tool having a cutting edge on the substantially cylindrical outer surface. When the tool pressing means presses the outer side cutting edge of the cutting tool rotated by the tool rotating means against the side surface of the workpiece to be fixed by the workpiece fixing means, the workpiece is cut. From this state, the tool moving means moves the cutting tool in the longitudinal direction of the workpiece, that is, the longitudinal axis direction, so that the workpiece is cut.

At this time, the cutting amount into the workpiece and the moving speed in the longitudinal direction are adjusted according to conditions such as the material of the workpiece, the rotational speed of the cutting tool, the type of cutting oil, and the temperature, and if necessary. Iterative cutting is performed. And, this cutting tool, when the cutting tool is pressed against the workpiece to cut, the cutting chips are finely divided and cut, so that the cutting chips are continuously generated as in the prior art. It does not cause scratches on the surface of the test piece due to cutting chips. Further, a test piece with little heat generation and good dimensional accuracy can be obtained.

Further, since the member to be processed can be rotated while the member to be processed can be processed,
A rod-shaped test piece with a circular cross section can be processed.

Further, according to the present invention, in a method for processing a round bar-shaped test piece used for testing mechanical and physical properties, both end sides of a columnar workpiece to be processed on the test piece are fixed. , While rotating a cutting tool having a cutting edge on the substantially cylindrical outer surface , along the longitudinal direction of the workpiece
With pressing the cutting edge to the workpiece by rotating the cutting tool about an axis extending, said cutting tool
While moving along the axis, the workpiece is rotated about its longitudinal axis.
The test piece can be processed into a rod shape having a circular cross section by rotating the test piece.

In the method of processing the test piece, as in the case of the processing apparatus, both ends are fixed, so that even a slender columnar body with low accuracy can be fixed quickly, and since it is not a cantilever fixing such as lathe processing, it can run out. Absent. Also, when the cutting tool is pressed against the workpiece to perform cutting, unlike the conventional technology, cutting debris does not occur continuously, but it comes out in finely divided pieces, so the cutting debris on the surface of the test piece No processing scratches. Further, a test piece with little heat generation and good dimensional accuracy can be obtained.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a test piece processing apparatus and a processing method according to the present invention will be described below in detail with reference to the drawings. 1 to 9, the same or equivalent parts are designated by the same reference numerals.

FIG. 1 is a front view showing an embodiment of a test piece processing apparatus according to the present invention, a part of which is shown in section. FIG. 2 is a crushing side view of FIG. 1. The test piece processing apparatus 1 according to the present embodiment is used for testing mechanical and physical properties of metal materials.
For example, it is used for processing a test piece used for a tensile test or the like, and a work fixing means 3 as a work member fixing means for fixing both end sides of a work 69 as a work member to be processed on this test piece. The end mill rotating means 24 as a tool rotating means for rotating the end mill (cutting tool) 72 having the cutting edge 74 on the outer surface of the substantially cylindrical shape, and the outer surface cutting edge 74 of the end mill are fixed by the work fixing means 3. The end mill pressing means 30 as a tool pressing means for pressing the work 69, the end mill moving means 38 as a tool moving means for moving the end mill 72 in the longitudinal direction 70 of the work 69, and the workpiece rotating means for rotating the work 69. And a work rotating means 48.

As shown in FIG. 1, the work rotating means 48.
Has a clamp rotation gear motor 49, a pinion 50 attached to the gear motor 49, and a clamp rotation gear 51 meshing with the pinion 50. The clamp rotation gear 51 is fixed to the clamp body 4 of the work fixing means 3. To be done. Therefore, the rotation of the clamp rotating gear motor 49 is transmitted to the clamp body 4 to rotate the work 69.

As shown in FIG. 2, the end mill rotating means 2
4 is a spindle unit 25 for rotating the end mill 72 by a spindle motor 25a and a speed reducer 25b.
And a spindle base 27 that supports the spindle unit 25, and two shaft support portions 31 that pivotally support the spindle base 27 with respect to the ball screw spline 45. Further, the end mill pressing means 30 has a link arm 33 fixed to the shaft support portion 31 and a hydraulically operated swing that swings the link arm 33 in the rotation direction of the ball screw spline 45 (clockwise or counterclockwise in the drawing). It has a moving cylinder 35 and a stopper 36 that rotates and stops the link arm 33 to a prescribed position. The stopper 36 adjusts the stopper position with a bolt 36a and a nut 36b.

FIG. 3 is a sectional view taken along the line I--I of FIG. The shaft support 31 is provided on the left and right so as to sandwich the spindle unit 25 (FIG. 1). When the link arm 33 is rotated by the swing cylinder 35, the link arm 33 is rotated.
The spline outer cylinder 44 of the rotary ball spline portion of the ball screw spline fixed to is rotated. Further, the ball screw spline spline shaft 45 rotates,
The spindle unit 25, and thus the end mill 72, is rotated so as to be pressed against the work 69 via the spindle base 27 shown in FIGS.

FIG. 4 is a front view of FIG. FIG. 5 is a plan view of FIG. In addition to the various means described above, the test piece processing apparatus 1 includes a switch base 60 to which a dust cover 58 for covering the end mill rotating means 24 and an operation panel box 61 are attached.
And a front safety door 54 provided on the front surface of the workpiece, and a lower shooter 57 (shown in FIGS. 1 and 2) for dropping cutting chips into the container. The front safety door 54 is preferably made of a transparent material so that the processed state of the test piece can be seen.

FIG. 6 shows the work fixing means, (A) is a sectional view taken along line II-II of (B), and (B) is a front view showing the upper half in section. The work fixing means 3 is a clamp body 4
And the work 69 arranged on the tip side of the clamp body 4.
Clamp claw 6 for clamping (fixing) and clamp claw 6
A slide cam 8 that has a fitting piece 9 that slidably fits in the inclined groove 7 formed in
The clamp element 12 is connected to the slide cam 8 and moves in the workpiece longitudinal direction 70. Further, the clamp element 12 is connected to the clamping unit 14 which is the air pressure increasing cylinder shown in FIG. 1 and moves in and out by air. The clamp body 4 is rotatably supported by the device frame 67 via a bearing 17. The bearing 17 is sandwiched by two bearing retainers 10 fixed by bolts 11 and fixed to the device frame 67. Two oil seals 18 are provided between the two bearing retainers 10 and the clamp body 4. Note that reference numeral 16
Is a clamp plate.

FIG. 7 is a sectional view showing a drive portion of the end mill moving means 38 shown in FIG. End mill moving means 38
Is a geared motor 39 fixed to the device frame 67 with mounting bolts 40, a pinion 41 fixed to the geared motor 39, and a transmission gear 42 meshing with the pinion 41.
It has a nut rotation ball screw 44 which is fixed to the transmission gear 42 and rotates to move the ball screw spline 45 through the ball in the axial direction 46.

The test piece processing apparatus 1 of this embodiment having the above structure operates as follows. That is, in FIG. 1, the work fixing means 3 clamps and fixes both ends of the work 69 processed into a test piece. The end mill rotating means 24 includes an end mill 7 having a cutting edge 74 on its outer surface.
Rotate 2. The end mill pressing means 30 is a cutting blade 7 of the end mill rotated by the end mill rotating means 24.
When 4 is pressed against the side surface of the work 69 fixed by the work fixing means 3, the work 69 is cut. Since the end mill moving means 38 moves the end mill 72 from this state in the longitudinal direction 70 of the work 69, that is, the longitudinal axis direction, the work 69 is cut.

At this time, the material of the work 69 and the end mill 7
The cutting amount into the work 69 and the moving speed in the longitudinal direction 70 are adjusted according to conditions such as the number of revolutions of 2, the type of cutting oil, and the temperature, and the repetitive cutting process is performed as necessary. When the end mill 72 is pressed against the workpiece 69 and cut, the test piece processing apparatus 1 does not continuously generate chips unlike the prior art, but comes out after being finely divided. There is no processing scratches. Further, a test piece with little heat generation and good dimensional accuracy can be obtained. Furthermore, since the work 69 can be processed while rotating by providing the end mill rotating means 24, it is possible to process a rod-shaped test piece having a circular cross section. Also, the end mill 7
By giving proper rotation to 2 for rough cutting and finish cutting, good cutting surface, proper processing capacity, and extension of cutting edge life are brought about.

Next, a method of processing the test piece according to the present invention will be described.

FIG. 8 is an explanatory plan view showing an embodiment of the method for processing a test piece according to the present invention. The test piece processing method of the present embodiment is, as described in the above-described test piece processing apparatus 1, a method of processing a round rod-shaped test piece used for a test of mechanical properties of a metal material, for example, a tensile test. so,
Both ends of a workpiece (member to be processed) 69 to be processed into a test piece are fixed, and the workpiece 69 is rotated in the direction of arrow 79.
While rotating the end mill (cutting tool) 72 having the cutting edge 74 on the substantially cylindrical outer surface, the cutting edge 74 is pressed against the work 69 in the direction of the arrow 76, and the end mill 72 is indicated by the arrow 77 which is the longitudinal direction of the work. Process while moving in the direction. In this case, the rotation direction of the end mill 72 is clockwise as indicated by the arrow 78, for example. This allows the test piece to be processed into a round bar shape.

The processing method of this test piece is as follows:
When the workpiece is pressed against the workpiece 69 for cutting, cutting chips do not continuously occur and are finely divided and come out, so that the surface of the test piece is not scratched. Further, a test piece with little heat generation and good dimensional accuracy can be obtained.

Although the present invention has been described in detail with reference to the embodiments shown in the drawings, it is needless to say that the present invention is not limited to these embodiments and various modifications can be made. .

[0025]

According to the apparatus for processing a test piece of the present invention, it is possible to obtain a test piece with good dimensional accuracy without processing scratches by a simple device.

Further, according to the method for processing a test piece of the present invention, it is possible to perform a work without manpower except for inserting and removing a work, avoiding a dangerous work, and having a good dimensional accuracy without a processing scratch. You can get a piece.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of an apparatus for processing a test piece according to the present invention, a part of which is shown in section.

2 is a crushing side view of FIG. 1. FIG.

FIG. 3 is a sectional view taken along line I-I of FIG.

FIG. 4 is a front view of FIG.

FIG. 5 is a plan view of FIG.

FIG. 6 shows the work fixing means of FIG. 1, (A) is (B)
II-II sectional view taken on line (B) is a front view showing the upper half in section.

7 is a cross-sectional view showing a drive unit of the end mill moving means 38 of FIG.

FIG. 8 is a plan view illustrating an embodiment of a method for processing a test piece according to the present invention.

[Explanation of symbols]

1 Test piece processing equipment 3 Work fixing means (workpiece fixing means) 24 End Mill Rotating Means (Tool Rotating Means) 30 End mill pressing means (tool pressing means) 38 End mill moving means (tool moving means) 48 Work rotation means (workpiece member rotation means) 69 Workpiece (workpiece) 70 Longitudinal direction 72 End Mill (Cutting Tool) 74 cutting edge

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-9-47912 (JP, A) JP-A-7-40122 (JP, A) JP-A-7-301584 (JP, A) JP-A-3- 238338 (JP, A) Actual development Sho 63-44139 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G01N 1/28 B23C 3/04 G01N 3/00 JISST file (JOIS)

Claims (2)

(57) [Claims] 1. A device for processing a round bar-shaped test piece used for testing mechanical and physical properties, wherein a member to be processed is fixed to fix both ends of a columnar member to be processed on the test piece. means a tool rotating means for rotating the cutting tool having a cutting edge in a substantially cylindrical outer surface, and the tool moving means for moving the front SL cutting tool along an axis extending in the longitudinal direction of the workpiece , Rotate the cutting tool around the axis
By pressing the cutting edge of the cutting tool against the workpiece.
An apparatus for processing a test piece , comprising: a tool pressing means; and a workpiece rotating means for rotating the workpiece around its longitudinal axis . 2. A method for processing a round bar-shaped test piece used for testing mechanical and physical properties, wherein both end sides of a columnar workpiece to be processed on the test piece are fixed to form a substantially cylindrical shape. Around the axis extending along the longitudinal direction of the workpiece while rotating the cutting tool having the cutting edge on the outer surface of the
Machining a test piece that rotates the cutting tool against the workpiece by rotating the cutting tool against the workpiece and rotating the workpiece around its longitudinal axis while moving the cutting tool along the axis. Method.