JPH10132722A - Indenter shaft unit for micro hardness tester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an indenter shaft system for micro hardness tester compacter. SOLUTION: The indenter unit 5 is constituted by supporting an indenter shaft 1 having an indenter 2 at the central section of a cylindrical moving pipe 6 by a supporting spring 16 in a vertically movable state and firmly fixing a cylindrical body 8 to a support pipe 15 into which the moving pipe 6 is inserted so that the pipe 6 can move in the axial direction, and then, interposing a return spring 14 between the support pipe 15 and moving pipe 6 so that the indenter shaft system can be made compacter. In addition, since the indenter shaft unit 5 can be handled as a single body, the replacement work of the indenter 2 to a rotary frame 11 can also be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a micro hardness tester, and more particularly to an indenter shaft unit suitable for a micro Vickers type hardness tester.

[0002]

2. Description of the Related Art As a conventional example of a micro hardness tester, a turret type as shown in FIG. 2 is known. That is, in FIG. 2, reference numeral 1 denotes an indenter shaft, and an indenter 2 is attached to a tip of the indenter shaft 1 with a screw. Reference numeral 10 denotes a machine frame of a test machine, and a rotating frame 11 is attached to the machine frame 10 so as to be rotatable about a rotation center shaft 12. A motion plate 27 is mounted on the rotating frame 11 while being supported by a leaf spring 26 and a return spring 14, and the cone receiver 13 is mounted on the motion plate 27. Push rod on outer end of exercise plate 27
A push rod receiver 27a with which the lower end of 18 abuts is attached. The conical portion 1a of the indenter shaft 1 abuts on the conical receiver 13 from above and is urged upward by the return spring 14, so that the indenter shaft 1 is held in the state of FIG. I have.

In order to ensure that the indenter shaft 1 moves in the vertical direction, a support spring 16 is mounted near the upper end of the indenter shaft 1. The base end of the support spring 16 is attached to a spring support member 17 erected on the rotating frame 11. The push rod 18 is supported by the rotating frame 11 in the vicinity of its upper end so as to be vertically movable,
The lower end 19 of the control lever 22 is in contact with the upper end surface. The control lever 22 is pivotally supported on the machine frame 10 by a shaft 22a, and has a push-down portion 19 at a distal end thereof, and a roller 24 rotatably connected to a cam 25 at a proximal end thereof.

Reference numeral 20 denotes a test load applying mechanism.
The test load applying mechanism 20 includes a weight 23, a load shaft 21 carrying the weight 23, and a casing 27.
Reference numeral 21 extends downward through the control lever 22 so that its lower end is opposed to the upper end of the indenter shaft 1. Reference numeral 21a indicates a pin protruding from the load shaft 21.
The control lever 22 is configured to contact the control lever 22 from above. When the cam 25 is rotated to gradually release the pressing of the control lever 22 by the cam 25, the control lever 22
Rotates counterclockwise about the shaft 22a. As a result, the cone receiver 13 descends together with the push rod 18, and the indenter shaft 1 supported by the cone receiver 13 also descends.

When the tip of the indenter 2 comes into contact with the sample, the indenter shaft 1 is released from the cone receiver 13 and a set load (the weight of the weight 23) is applied to the sample 3 on the sample stage 4. cam
When 25 returns to its original position, the motion plate 27 and the push rod 18
Is pushed up by the restoring force. At this time, the indenter shaft 1 is also lifted by the cone receiver 13, and the loading process is completed. The rotary frame 11 is provided with an objective lens (not shown) for measuring an indentation formed on the sample 3 on a circle concentric with the indenter shaft 1.

[0006]

By the way, in the conventional micro hardness tester as described above, the support mechanism of the indenter shaft is composed of the support spring 16, the push rod 18, the motion plate 27, and the leaf spring 26. Therefore, a large space is required for the indenter shaft system (the indenter shaft and its supporting mechanism). Therefore, conventionally, the rotating frame 11
Has only one indenter shaft, and if you want to use a different indenter, you must replace it with a new one. To replace the indenter, (the indenter is attached to the lower end of the indenter shaft with a screw. It is necessary to remove the indenter by loosening the screw for mounting the indenter, then insert a new indenter into the indenter shaft and fix it with screws. In addition, since the screws are very small, the screws must be replaced during the indenter replacement work. In addition, there is a problem that the replacement of the indenter is troublesome because there is a risk of losing the indenter and the work of aligning the indenter is required.

The present invention seeks to solve such a problem. The indenter shaft system is formed into a unit having a small space (this is referred to as an "indenter shaft unit"), and the indenter (shaft) is formed. An indenter shaft unit in a micro hardness tester that can be attached to and detached from the rotating frame in units including the support mechanism, and that multiple indenter shaft units can be mounted on the rotating frame. The purpose is to provide.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a microhardness tester, in which a moving cylinder made of a cylindrical body forming a main body and a vertically movable movable cylinder via a support spring at the center of the moving cylinder. An indenter mounted on the tip of the indenter shaft, a conical receiver provided at a lower end of the exercise cylinder for receiving a conical portion of the indenter shaft, and an outer periphery of the exercise cylinder. A support cylinder in which the exercise cylinder is slidably inserted in the axial direction,
A return spring interposed between the exercise cylinder and the support cylinder,
A problem is solved by forming an indenter shaft unit with a mounting cylinder integrally provided on the support cylinder, and mounting the indenter shaft unit to a rotating frame of the micro hardness tester by the mounting cylinder. Means.

Further, a flange portion is formed on the mounting cylinder, a hole is formed in the rotating frame in which the moving cylinder can be inserted, and the moving cylinder is inserted and arranged in the hole, and then the mounting cylinder is mounted. A bolt is inserted between the flange on the cylindrical body and the rotary frame so that the indenter shaft unit can be attached to the rotary frame.

In the present invention, the indenter shaft (including the indenter) and its support mechanism are incorporated into a moving cylinder as a main body of the indenter shaft unit to form an integrated (unitized) unit, so that the indenter shaft is replaced. Can be performed by replacing the indenter shaft unit in which the indenter shaft and its supporting mechanism are integrated (unitized), and the replacement work of the indenter can be simplified.

In addition, since the indenter shaft and its supporting mechanism are incorporated in a moving cylinder as a main body to reduce the size (to save space), a plurality of indenter shaft units can be mounted on the rotating frame. Become.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of an indenter shaft unit in a micro hardness tester according to an embodiment of the present invention. 1 that are the same as those in FIG. 2 indicate substantially the same members.

In FIG. 1, reference numeral 5 denotes an indenter shaft unit. The indenter shaft unit 5 is
An indenter shaft 1 is supported by a diaphragm supporting spring 16 at the center of the moving cylinder 6 so as to be able to move up and down.

A conical receiver 13 is attached to the lower end of the exercise cylinder 6 so as to support the conical portion 1a of the indenter shaft 1. A support tube 15 that supports the movement cylinder 6 slidably in the axial direction is fitted outside the movement cylinder 6, and the movement cylinder 6 is attached via a cylindrical member 7 attached to the outside of the support cylinder 15. Is attached to the rotating frame 11.

A flange 8a protrudes from the cylindrical body 8, and the indenter shaft unit 5 is detachably attached to the rotary frame 11 by bolts 9 inserted through the flange 8a and the rotary frame 11.

The rotation frame 11 has a rotation center axis (reference numeral 1 in FIG. 2).
2) A plurality of indenter shaft units 5
A plurality of indenter shaft units 5 are inserted into the respective mounting holes 11a from below the rotary frame 11 and the flange portions 8a of the cylindrical body 8 and the rotary frame 11 are connected with the mounting bolts 9. Thus, the indenter shaft unit 5 can be easily fixed to the rotating frame 11. It goes without saying that the indenter shaft unit can be removed in the reverse order.

The point that an objective lens (not shown) for measuring an indentation formed on the sample 3 is mounted on a concentric circle with the mounting hole 11a as in the case of a normal turret type hardness tester. is there.

A return spring 14 is interposed between the support cylinder 15 and the movement cylinder 6, and the movement cylinder 6 is constantly urged upward by the return spring 14. Above the rotating frame 11, a test load applying mechanism 20 and a control lever 22 substantially similar to those shown in FIG. 2 are provided.

It is to be noted that one test load applying mechanism 20 is provided, and one of the plurality of indenter shaft units 5 is provided.
However, the indenter shaft 1 and the load shaft 21 are aligned (both are on the same vertical line), and the pressing portion 19 of the control lever 22 is pressed.
When the rotating frame 11 is rotated to a position where the moving cylinder 6 and the moving cylinder 6 face each other, and then the cam 25 is rotated by a motor (not shown), the moving cylinder 6 is lowered via the control lever 22 and
The indenter shaft 1 supported by the conical receiver 13 is also lowered together with the moving cylinder 6. At this time, the load shaft 21 is also lowered together with the control lever 22.

Even when the tip of the indenter 2 comes into contact with the sample 3 and stops descending due to the lowering of the indenter shaft 1, the moving cylinder 6 continues to descend, so that the indenter shaft 1 is released from the moving cylinder 6. On the other hand, the load shaft 21
The lower end of the load shaft 21 abuts on the upper end of the indenter shaft 1 together with the moving cylinder 6, and the indenter shaft 1 is pushed down by the test load on the load shaft 21 so that the indenter 2 is pressed against the sample 3. Indentations are formed on the surface. After that, when the cam 25 returns to the original position again,
The moving cylinder 6 is pushed up by the restoring force of the return spring 14. At this time, the indenter shaft 1 is also lifted by the conical receiver 13, and the loading step (the step of forming an impression on the sample) is completed. Note that the above-described series of indentation forming procedures is the same as in the case of a normal hardness tester.

In this embodiment, as described above, the indenter shaft 1
(Including the indenter 2) and its supporting mechanism (for example, a pressure-receiving part (top of a moving cylinder) for applying a test load to the indenter shaft, a support spring 16, a return spring 14, a support cylinder 15, etc. of the indenter shaft 1) Since the indenter shaft unit is formed integrally with the motion cylinder 6 as the main body, the indenter shaft and its support mechanism can be handled as an integral body when the indenter shaft is attached to or detached from the hardness tester.

Therefore, the indenter can be replaced by replacing the indenter shaft unit, and since the replacement operation is simple, the indenter can be easily replaced. Further, since the indenter shaft and its supporting mechanism are unitized to be compact, a plurality of indenter shafts (units) can be mounted on the rotating frame. When a plurality of indenter shaft units having different indenters are provided on the rotating shaft, the work of exchanging the indenter is eliminated, and a prompt test using a plurality of indenters becomes possible.

Further, since the indenter shaft unit can be manufactured in a dedicated factory, it is more efficient and has a higher quality than the conventional method of assembling each member to the machine frame in the process of assembling the hardness tester. Can be provided at a low cost.

[0024]

As described in detail above, according to the indenter shaft unit in the micro hardness tester of the present invention, the following effects and advantages can be obtained. (1) The indenter shaft (including the indenter) and its supporting mechanism are assembled into a moving cylinder to make a unit and formed into an indenter shaft unit. Therefore, the indenter is replaced (the indenter shaft and its supporting mechanism are integrated (unitized)). By replacing the indenter shaft unit thus configured, the replacement of the indenter can be simplified. (2) The indenter shaft and its supporting mechanism are incorporated in the moving cylinder as the main body to reduce the size, so that a plurality of indenter shaft units can be mounted on the rotating frame. (3) It is possible to manufacture a high quality indenter shaft system at low cost.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an indenter shaft unit in a micro hardness tester as one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of (a load mechanism section) of a conventional microhardness tester.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Indenter shaft 1a Conical part on indenter shaft 2 Indenter 3 Sample 4 Sample stand 5 Indenter shaft unit 6 Exercise cylinder 7 Cylindrical member 8 Cylindrical body for mounting indenter shaft unit 9 Bolt 10 Machine frame 11 Rotating frame 12 Rotating center axis 13 Conical Support 14 Return spring 15 Support cylinder 16 Support spring 17 Support member of support spring 19 Depressed part 20 Test load applying mechanism 21 Load shaft 21a Pin on load shaft 22 Control lever 22a Shaft 23 Weight 24 Roller 25 Cam 26 Leaf spring 27 casing

Claims (2)

[Claims] An indenter shaft unit detachably attached to a rotating frame of the microhardness tester, wherein the indenter shaft unit is a cylindrical motion cylinder forming a main body. An indenter shaft supported at a central portion of the moving cylinder via a supporting spring so as to be movable in a vertical direction; an indenter attached to a tip end of the indenter shaft; and an indenter shaft mounted at a lower end of the moving cylinder. A conical receiver for receiving the conical portion, a support cylinder in which the exercise cylinder is slidably fitted in the outside of the exercise cylinder in the axial direction, and a return interposed between the exercise cylinder and the support cylinder. An indenter for a micro hardness tester, comprising: a spring; and a mounting cylinder body provided integrally with the support cylinder as a mounting member to a rotating frame of the hardness test machine. Shaft unit. 2. A mounting cylinder for the moving cylinder, wherein a flange portion is formed in the mounting cylinder, a hole through which the moving cylinder can be inserted is formed in the rotating frame, and the moving cylinder is inserted and disposed in the hole. Claims: A microhardness tester, characterized in that the indenter shaft unit is configured to be attached to the rotating frame by a bolt that penetrates the body flange and the rotating frame. Item 2. The indenter shaft unit according to item 1.