JPS5820914Y2 - gauge stamp - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a gauge marking device for tensile test pieces, etc.

Test pieces used for tensile tests of metal materials are provided with gauge points that serve as standards for measuring elongation.

The gauge marks in the parallel part of the specimen are marked using conventional gauge marks.
In accordance with the same markings, marks were made with a punch.

In this case, since the punch is supported by hand and each point is struck with a hammer, the accuracy of the length between the gauges is poor and deviations in the circumferential direction of the test piece occur, and the punch easily slips, so it is not used for the test piece. This resulted in expensive test pieces being discarded.

The purpose of this invention is to improve the accuracy of the length between gauges and eliminate deviations in the circumferential direction of the specimen in gauge stamping, and to improve workability. By attaching a punch for marking the gauge points, the need for marking the gauge points as in the past is eliminated. ■Two blocks are used to sandwich the test piece from above and below to eliminate circumferential deviation of the test piece.It is used for testing not only tensile test pieces but also creep test pieces and fatigue test pieces. It is applicable if the parallel section has a circular or cylindrical shape (pipe shape).

The present invention will be explained below based on the embodiments shown in FIGS. 1 and 2.

Fig. 1 is a partial vertical cross-sectional view showing an example of the gage stamping device according to the present invention, and Fig. 2 is a partial vertical cross-sectional view of the same, where 1 is a stand and 2 is stored in the center of the case 1. 10 is a handle for operating the magnet, and 3 is a lower V block which is fixed on the 1 side (right side) of the table 1.

Reference numeral 4 denotes a lid, which is rotatably coupled to the other side (left side) of the table 1 using a pin 5 as a fulcrum.

Reference numeral 6 denotes an upper block (1) fixedly attached to the lid 4 side, and is provided at a position opposite to the lower block (3) when the lid 4 is closed.

Reference numeral 7 denotes a test piece, and the parallel portion of the test piece 7 is held between the two blocks 3 and 6 described above.

8a and 8b are punches for stamping gauge marks on the test piece 7, and these pair of punches 8a and 8b are used to stamp marks on the lid 4, respectively.
It is fitted into the through-hole a on the lid side provided at a predetermined interval in the side of the above-mentioned block 6 disposed in the block 6 so as to be vertically movable with a gage interval d, and is supported by a spring 9 during normal operation. (When not stamping) Both punches 8a are held upward,
The tip of the test piece 8b is housed in the lid 4 to prevent any harmful damage to the surface of the test piece 7 when the test piece 7 is attached.

In addition, the magnet 2 installed on the stand 1 securely fixes the test piece 7 sandwiched between the upper and lower V blocks 3 and 6 by attracting the lid 4, and the handle 10 can be used to attract (on) or open (off) the test piece 7. ).

To explain the operation, operate the handle 10 of the magnet 2 to open the magnet 2, open the lid 4 in the direction of arrow A, place the test piece 7 on the lower block 3, and close the lid 4. The parallel part of the test piece 7 is held between the upper and lower blocks 3 and 6.

After setting the test piece 7 in the correct position, operate the handle 10 of the magnet 2 to bring the magnet 2 into an adsorbed state, and fix the stand 1 and lid 4 by magnetic force.
Securely fix the test piece 7 between the upper and lower blocks 3 and 6.

Next, a gauge mark is stamped on the test piece 7 by hitting the head of the punch 8a in the direction of arrow B.

Similarly, the head of the other punch 8b is struck, and the pump 8
After stamping marks at two locations separated by a distance d from the marking mark a, the handle 10 is operated to open the magnet 2, the lid 4 is opened, and the test piece 7 is taken out.

In short, the present invention consists of a stand 1 having a V-block 3 on which a test piece 7 is placed, and a block 6 that is connected by a gap 1 and a hinge 5 and that faces the V-block 3 and presses the test piece 7 when closed. and a lid 4 with a predetermined interval d on the side of the block 6 disposed on the same piece 4.
This is a gauge point stamping device characterized by comprising a pair of punches 8a and 8b slidably attached to a through hole a provided in the gauge.

According to the present invention, (i) the lid is pivotally attached to the stand and is rotatable, making it easy to attach the test piece.

Also, since the test piece is held between the ■ block on the lid side and the ■ block on the right side, the installation of the test piece is stabilized and workability is improved.

If necessary, the clamping force of the block can be easily increased by using a magnet to attract and fix the stand and the lid with magnetic force as in the embodiment.

(ii) Also, in the present invention, since the pair of punches are attached to the lid at intervals equal to the length between the gauge marks, the positions and intervals of the gauge marks are reliably determined.

Therefore, the work of marking gauge points becomes unnecessary.

(iii) Furthermore, since the test piece is fixed by both V-blocks, there is no displacement in the circumferential direction of the test piece as in the conventional case, and therefore, there is no occurrence of test piece defects due to stamping errors.

(iv) In addition, in the present invention, by inserting a spring into each of the pair of punches as in the embodiment, the punches are normally stored in the lid, so that harmful scratches are not caused on the surface of the test piece.

(v) Furthermore, since the lid and the base are connected and the punch is attached to the lid, problems such as the conventional problem of missing the punch and taking time to search for it are eliminated.

[Brief explanation of drawings]

1 and 2 show an embodiment of the present invention, and FIG.
FIG. 2 is a partial longitudinal cross-sectional view, and FIG. 2 is a partial longitudinal cross-sectional side view. 1... stand, 4... lid, a...
Through hole, 3, 6... V block, 5...
・Hinge pin, 8a, 8b...punch,
10... Handle for operating magnet 2, 9.
·····Spring.

Claims (1)

[Scope of utility model registration request] A stand having a V-block on which a test piece is placed, a lid having a block connected by a hinge and facing the V-block and holding the test piece when closed, and a lid disposed on the same side. (2) A gauge marking device comprising a pair of punches slidably attached to through-holes provided in the cover at a predetermined interval on the sides of the block.