KR200344921Y1 - A marking device for tensile test piece of board type - Google Patents

Abstract

Disclosed is a mark type rudder for sheet-like tensile specimens that can easily and accurately mark a desired mark on a desired position on a test piece, thereby increasing the accuracy of measuring tensile elongation of the test piece. The plate marking machine for plate-shaped tensile test pieces according to the present invention includes a lower base, an upper base, and a rudder bar. The lower base has a plate-shaped body, vertical guide rods fixed respectively near the edges of the body, and a lower stepped v-block fixed laterally on the upper surface of the body. At this time, while the male thread is formed on the outer circumferential surface of the guide rod, the compression spring is mounted, respectively. The upper base has a cover plate having a plate shape, a tightening nut with female threads formed on the inner circumferential surface, and a pair of push pins formed on the lower surface of the cover plate. At this time, the center plate is marked on the cover plate, and guide holes through which each guide rod is formed, and a plurality of mark guide holes are formed in the center, and the mark distance from the mark guide holes is displayed. In addition, the tightening nut is fastened to the upper portion of each guide rod extending through the cover plate, the push pin is a compression spring is built therein. On the other hand, the angle bar has a pointed rod shape at the bottom is inserted into the gage guide hole to take a mark on the outer peripheral surface of the specimen.

Description

A marking device for tensile test piece of board type}

The present invention relates to a gauge for marking, and more particularly, to a gauge for marking plate-type tensile specimens that can easily mark the gage distance on a plate-shaped specimen.

In general, various materials such as plastics, rubber, rebar, steel, and various nonferrous metals can be known by measuring their strength, hardness, elongation, and cross-sectional shrinkage. The most commonly used test is the tensile test. Tensile test is a test to measure the tensile strength, yield point, yield strength, elongation, section shrinkage and elastic limit by examining the relationship between extension strain and load to failure by putting the specimen on the tester and gradually applying load in the axial direction. In this case, the elongation (ε) measurement indicates the difference between the gage distance (L) after fracture of the specimen and the standard distance (LO) before the test as a percentage of the gage distance (LO).

The elongation measured in this way has a great influence on the degree of elongation, depending on the accuracy of measuring the gage lengths by marking the gages on the specimens or connecting the broken specimens after the tensile test. In addition, in order to accurately display the gage distance, a gage was drawn on the specimen and a gage distance was displayed using a general-purpose measuring instrument such as a vernier caliper.

However, the above-described gage distance display method has a problem that requires the skill of the user.

The present invention was devised to solve the conventional problems as described above, the object of the present invention is to have a base having a stepped V-block in which the specimen is placed, and the specimen is elastically in close contact with the stepped V-block while being placed on top of the base In order to provide a gauge for the plate-type tension specimen that can be easily displayed even for beginners by providing a cover plate for fixing the cover plate and an angle bar that penetrates the center of the cover plate to mark the mark distance on the specimen. .

Another object of the present invention is to form a step-shaped seating portion on the inner surface of the stepped V-groove formed in the stepped V-block, the plate material can display the exact mark distance on the center line of the width in accordance with the width of the test piece The present invention provides a gauge for marking type tension specimens.

1 is a perspective view showing a coupling point marking machine for a plate-shaped tensile test piece according to the present invention,

Figure 2 is an exploded perspective view showing the mark type marking machine for the plate-shaped tensile test piece according to the present invention,

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

Figure 4a and 4b is a cross-sectional view showing a state of use of the plate type marking machine for the plate-shaped tensile test piece according to the present invention.

Explanation of symbols on the main parts of the drawing

100: gage marking machine for plate type tensile tester 110: lower base

112: main body 114: guide rod

118: compression spring 120: stepped V-block

122: stepped V-groove 130: upper base

132: cover plate 136: tightening nut

140: gage guide hole 142: mounting groove

146: push pin 150: elastic spring

160: angle bar

In order to achieve the above object, the present invention,

The main body has a plate shape, is formed perpendicularly to the upper surface adjacent to the corner of the main body, the guide rod is formed on the outer circumferential surface and the compression spring is mounted, respectively, and the "V" shape on the upper surface while being fixed on the upper surface of the main body. A lower base having a stepped V-block having a stepped V-block formed transversely to settle the specimen;

A guide plate is formed at a position corresponding to each guide rod while having a plate shape, and a cover plate having a plurality of mark guide guides formed so as to be symmetrical to each other in both directions from the center on the upper surface, and the cover plate are selectively provided along the guide rod. An upper base having a tightening nut formed on an inner circumferential surface of the female screw having a shape corresponding to the male screw so as to be moved downward; And

The lower end has a pointed rod shape and is inserted into the guide guide holes symmetrical to each other to provide a plate-type target for the plate-type tensile test piece including a rudder bar to mark the outer peripheral surface of the specimen.

Hereinafter, with reference to the accompanying drawings will be described for the plate-type marking machine for the plate-shaped tensile test piece according to an embodiment of the present invention.

1 is a combined perspective view showing the plate-type marking machine for the plate-type tensile test piece according to the present invention, Figure 2 is an exploded perspective view showing the plate type marking machine for the plate-type tensile test piece according to the present invention, and Figure 3 is AA of FIG. It is a cross-sectional view along the line.

Referring to FIGS. 1 and 2, the mark marking machine 100 according to the present invention includes a lower base 110, an upper base 130, and a rudder bar 160. The lower base 110 includes a main body 112 having a plate shape, a guide rod 114 and a stepped V block 120 fixed to an upper portion of the main body 112. The guide rod 114 is vertically fixed on the upper surface adjacent to the edge of the main body 112. The male screw 116 is formed on the outer circumferential surface of each of the guide rods 114, and the compression spring 118 is mounted on the outside thereof. On the other hand, the staircase v-block 120 is disposed between each guide rod 114 at the top of the main body 112. The stepped V-groove 122 having a “V” shape is formed in the center portion on the upper surface of the stepped V-block 120 laterally from one end to the other end of the stepped V-block 120. At this time, both side surfaces of the stepped V-groove 122 are formed in a step shape so as to have a symmetrical shape. Preferably, the stepped v-block 120 has a plurality of bolts (B) is fastened through the stepped v-block 120 from the bottom surface of the body 112. The upper base 130 is disposed above the lower base 110 formed as described above.

The upper base 130 includes a cover plate 132, a tightening nut 136, and a push pin 146. The cover plate 132 has a plate shape and has a shape in which the central portions of both sides are rounded inwardly so that each guide rod 114 penetrates at a position corresponding to the guide rod 114 formed in the main body 112. Guide holes 134 are formed respectively. At this time, each of the guide rods 114 penetrating through the cover plate 132 is fastened to the tightening nut 136 is formed with a female screw (not shown) having a shape corresponding to the male screw 116 on the inner peripheral surface. In addition, a plurality of mark guide holes 140 are formed on the upper surface of the cover plate 132 so as to be symmetrical with respect to one side and the other direction starting from the center, and a center mark C is formed to facilitate centering when the specimen is mounted. Has a gage distance indication on the gage guide hole 140, the worker can angle the required gage distance. In addition, the pressing pin 146 is provided on the lower surface adjacent to both ends of the cover plate 132 to arrange the elastic spring 150 on the inner side to fix the specimen elastically.

On the other hand, the rudder bar 160 has a rod shape with a pointed bottom. At this time, the outer diameter of the rudder bar 160 should be the same as the inner diameter of the mark indicator hole 140 and the pointed end should be designed to be located on the center line of the round bar.

Hereinafter will be described briefly the state of use of the tension tester marking machine 100 formed as described above.

Figure 4a and 4b is a cross-sectional view showing a state of use of the plate type marking machine for the plate-shaped tensile test piece according to the present invention.

First, the specimen to display the gage distance should be fixed to the gage marking machine 100, in this case loosen each tightening nut 136 as shown in Figure 4a. When the tightening nut 136 is released, the compression spring 118 mounted on the guide rod 114 pushes the cover plate 132 upward, so that the cover plate 132 is spaced apart from the stepped block 120 at a predetermined interval. Will be. As such, when the cover plate 132 falls off from the stepped V-block 120, the specimen is fitted. At this time, it is preferable that the specimen is mainly used a material having a plate shape. These specimens are placed in the stepped V-groove 122 of the stepped V-Block 120, and both sides of the stepped V-groove 122 have a stepped shape so that they are properly seated according to the width of the specimen. In order to fix the seated specimen, as shown in FIG. 4B, the fastening nuts 136 are fastened again to fix the specimen. At this time, the cover plate 132 is moved to the specimen side, the pressing pin 146 fixed to the lower side of the cover plate 132 first abuts on the specimen. As such, when the pressing pin 146 touches the test piece, the test piece is more elastically fixed by the elastic spring 150 embedded in the pushing pin 146.

When the specimen is fixed in this manner, marks are marked on the outer circumferential surface of the specimen. To mark the mark, insert the angle bar 160 into the mark guide hole 140 formed in the cover plate 132 and hit each angle bar 160 with a hammer (not shown) to mark the mark on the outer circumferential surface of the specimen. Is displayed. Preferably, the rudder bar 160 should be inserted with the pointed portion facing downward, and the rudder bar 160 should be inserted into the mark guide hole 140 formed at positions symmetrical with each other from the center of the cover plate 132. .

As described above, the plate type tapping machine for the plate-shaped tensile test piece according to the present invention is formed in a stepped V-groove of the stepped V-block on which the specimen is placed in a step shape, and on the upper side of the stepped V-block to fix the specimen. On the lower surface of the cover plate which is moved downward, a pair of push pins for firmly and strongly adhering the specimens is mounted, so that the mark of the desired bar can be easily and accurately displayed at the desired position on the specimen so that the specimen can be tensioned. There is an advantage that the accuracy of elongation measurement can be improved.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the present invention described in the utility model registration claims. It will be appreciated.

Claims (3)

A guide rod 114 formed on a main body 112 having a plate shape and vertically on an upper surface adjacent to an edge of the main body 112, and having an external thread 116 formed on an outer circumferential surface thereof, and having a compression spring 118 mounted thereon. A lower base having a stepped V-block 120 formed on the upper surface of the main body 112 and having a stepped V-groove 122 having a “V” shape on the upper side to rest the specimen. 110; A cover plate having a plate shape and a guide hole 134 is formed at a position corresponding to each of the guide rods 114, and a plurality of mark guide guide holes 140 are formed so as to be symmetrical to each other in both directions starting from the center of the upper surface. 132 and a female screw having a shape corresponding to the male screw 116 is formed on the inner circumferential surface so that the cover plate 132 can be selectively moved up and down along the guide rod 114. An upper base 130 having a tightening nut 136 fastened to an upper portion of the guide rod 114; And The bottom plate has a pointed rod shape and is inserted into the gage guide hole 140 is symmetrical to each other, the plate-type mark specimen for the plate-type tensile test piece, characterized in that it comprises an angle bar (160) to mark the outer peripheral surface of the specimen. According to claim 1, wherein both sides of the stepped v-groove facing each other is a plate-type marking machine for a plate-shaped tensile test piece, characterized in that the step shape. According to claim 1, wherein the cover plate 132 on the lower surface adjacent to the pair of push pins 146 for the plate-shaped tensile test piece, characterized in that a pair of push pins 146 with a built-in elastic spring 150 is mounted .