Dimension measurer for tensile property test

Abstract

The invention provides a size measurer for a tensile property test, and the size measurer comprises a supporting plate which is provided with a first surface; the fixing plate is fixedly connected with the first surface; the two movable plates are connected with the two opposite ends in the extending direction of the fixed plate in an inserted mode and abut against the first surface, and a center groove is defined by the supporting plate, the fixed plate and the two movable plates; the line printing assembly comprises a longitudinal center rod which is fixedly connected with the groove bottom of the center groove, extends in the length direction of the center groove and equally divides the width of the center groove; the transverse center rod is vertically connected with the longitudinal center rod, is fixedly connected with the groove bottom of the center groove and equally divides the length of the center groove; the first scale rod and the second scale rod are arranged in the center groove, are vertically connected with the longitudinal center rod respectively and are symmetrically arranged relative to the transverse center rod; and the third scale rod and the fourth scale rod are arranged in the central groove, are vertically connected with the longitudinal central rod respectively, and are symmetrically arranged relative to the transverse central rod.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical property testing, and in particular to a dimension measuring device for tensile property testing. Background Art

[0002] Tensile test refers to a test method for determining material properties under axial tensile load. When conducting tensile tests on tensile splines such as polypropylene and polyethylene, the tensile splines must first be marked to mark the positions where the upper and lower chucks of the testing machine are to be clamped, as well as the positions where the upper and lower clamps of the extensometer are to be clamped. Then the tensile splines are clamped on the testing machine, and the extensometer is installed to conduct tensile tests. In the prior art, when marking tensile splines, the operator generally manually marks the positions where the testing machine and the extensometer on the tensile splines need to be clamped with a marker and a ruler. However, manual operation will cause the human hand to contact the spline for too long, thereby affecting the temperature of the spline and the smoothness of the surface. In addition, the operating techniques of different operators will be slightly different, which will have a certain impact on the accuracy and precision of the tensile data. In addition, manual operation marks out each clamping position in turn, requiring the operator to repeat the marking operation, and the work efficiency is low. Summary of the invention

[0003] In view of this, the present invention provides a dimension measuring device for tensile performance testing to solve the above technical problems.

[0004] The dimension measuring device for tensile property testing provided by the present invention comprises:

[0005] A support plate, wherein the support plate is provided with a first surface;

[0006] a fixing plate, the fixing plate being fixedly connected to the first surface;

[0007] Two movable plates, the two movable plates are plug-connected with opposite ends of the fixed plate in the extending direction and abut against the first surface, and the support plate, the fixed plate and the two movable plates enclose a central groove;

[0008] A printing line component, the printing line component comprising:

[0009] A longitudinal center rod, the longitudinal center rod is fixedly connected to the bottom of the center groove, extends along the length direction of the center groove, and divides the width of the center groove equally;

[0010] A transverse center rod, the transverse center rod is vertically connected to the longitudinal center rod and fixedly connected to the bottom of the center groove and equally divides the length of the center groove;

[0011] A first scale rod and a second scale rod, wherein the first scale rod and the second scale rod are arranged in the central groove, are respectively vertically connected to the longitudinal central rod, and are symmetrically arranged with respect to the transverse central rod;

[0012] The third scale rod and the fourth scale rod are arranged in the central groove, are respectively vertically connected to the longitudinal central rod, and are symmetrically arranged about the transverse central rod.

[0013] Optionally, a first plug-in portion is provided at one end of the movable plate facing the fixed plate, and first plug-in holes are respectively provided at two opposite ends in the extending direction of the fixed plate, and the first plug-in portion is plug-connected with the first plug-in hole; or,

[0014] The fixed plate is provided with second plug-in parts at two opposite ends in the extension direction, and the movable plate is provided with a second plug-in hole at one end facing the fixed plate, and the second plug-in part is plug-connected with the second plug-in hole.

[0015] Optionally, a first scale is provided on the first plug-in portion; or a second scale is provided on the second plug-in portion.

[0016] Optionally, the dimension measuring device for tensile performance testing further comprises:

[0017] A water-absorbing pad is laid between the bottom of the central groove and the printing line assembly.

[0018] Optionally, the cross-sectional areas of the longitudinal center rod, the transverse center rod, the first scale rod, the second scale rod, the third scale rod and the fourth scale rod gradually decrease in a direction away from the bottom of the central groove.

[0019] Optionally, the width of the end portions of the first scale rod, the second scale rod, the third scale rod and the fourth scale rod away from the bottom of the central groove is less than 0.2 mm.

[0020] Optionally, the dimension measuring device for tensile performance testing further comprises:

[0021] A protective cover is provided to cover the central groove.

[0022] Optionally, the first scale rod and the second scale rod are movably connected to the longitudinal center rod.

[0023] Optionally, the third scale rod and the fourth scale rod are movably connected to the longitudinal center rod.

[0024] Optionally, scale values ​​are marked on the side wall of the movable plate facing the central groove.

[0025] Compared with the prior art, the above technical solution provided by the present invention has at least the following beneficial effects:

[0026] The dimension measuring device for tensile performance testing of the present invention reduces the contact time between the operator's hand and the tensile spline, does not affect the tensile spline, and has a unified operation method for different operators, thereby avoiding test errors caused by different operating methods of different operators and improving the accuracy and precision of tensile data. In addition, the tensile spline is placed on the marking assembly, and the marking of all marking positions can be completed at one time, eliminating repeated marking operations and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of a dimension measuring device for tensile property testing according to an embodiment of the present invention;

[0028] Figure 2 for Figure 1 A top view of a dimension measuring device for tensile properties testing is shown;

[0029] Figure 3 for Figure 1 Side view of a dimension gauge shown for tensile properties testing.

[0030] Reference numerals:

[0031] 1: support plate; 2: fixed plate; 3: movable plate; 4: printing line assembly; 41: longitudinal center rod; 42: transverse center rod; 43: first scale rod; 44: second scale rod; 45: third scale rod; 46: fourth scale rod; 5: first plug-in part. DETAILED DESCRIPTION

[0032] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only simplified descriptions for the convenience of describing the present invention, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0033] Figure 1 A schematic diagram of a dimension measuring device for tensile property testing according to an embodiment of the present invention; Figure 2 for Figure 1 A top view of a dimension measuring device for tensile properties testing is shown; Figure 3 for Figure 1 Side view of a dimension gauge shown for tensile properties testing.

[0034] like Figure 1-Figure 3 As shown, the dimension measuring device for tensile property testing includes a supporting plate 1, a fixed plate 2, two movable plates 3 and a printing line assembly 4.

[0035] The support plate 1 is provided with a first surface; the fixed plate 2 is fixedly connected to the first surface; the two movable plates 3 are plugged and connected to the opposite ends of the extension direction of the fixed plate 2 and abut against the first surface, and the support plate 1, the fixed plate 2 and the two movable plates 3 enclose a central groove; the printing line assembly 4 includes a longitudinal central rod 41, a transverse central rod 42, a first scale rod 43, a second scale rod 44, a third scale rod 45 and a fourth scale rod 46. The longitudinal central rod 41 is fixedly connected to the bottom of the central groove, extends along the length direction of the central groove, and divides the width of the central groove in half; the transverse central rod 42 is vertically connected to the longitudinal central rod 41, and is fixedly connected to the bottom of the central groove, and divides the length of the central groove in half; the first scale rod 43 and the second scale rod 44 are arranged in the central groove, respectively vertically connected to the longitudinal central rod 41, and symmetrically arranged with respect to the transverse central rod 42; the third scale rod 45 and the fourth scale rod 46 are arranged in the central groove, respectively vertically connected to the longitudinal central rod 41, and symmetrically arranged with respect to the transverse central rod 42.

[0036] When the stretch spline needs to be marked, the plug-in position of the two movable plates 3 and the fixed plate 2 is adjusted according to the width of the stretch spline, that is, the overlapping range between the movable plate 3 and the fixed plate 2 is adjusted, and then the width of the central groove is adjusted, so that after adjusting the position of the movable plate 3, the width of the central groove is the same as the width of the stretch spline, or slightly larger than the width of the stretch spline. The printing material is printed on the printing assembly 4, and the stretch spline is aligned with the central groove and placed on the printing assembly 4 in the central groove. Because the width of the stretch spline is equal to or approximately equal to the width of the central groove, and the length of the stretch spline is equal to the length of the central groove, the longitudinal center rod 41 corresponds to the axis of the stretch spline along the length direction, and the transverse center rod 42 corresponds to the axis of the stretch spline along the width direction. Press the tensile spline lightly, and the longitudinal center rod 41, the transverse center rod 42, the first scale rod 43, the second scale rod 44, the third scale rod 45 and the fourth scale rod 46 will leave marks on the tensile spline. The marks of the first scale rod 43 and the second scale rod 44 are the positions where the upper and lower clamps of the extensometer are to be clamped, and the marks of the third scale rod 45 and the fourth scale rod 46 are the positions where the upper and lower clamps of the testing machine are to be clamped.

[0037] The dimension measuring device for tensile performance testing of the present invention reduces the contact time between the operator's hand and the tensile spline, does not affect the tensile spline, and has a unified operation method for different operators, thereby avoiding test errors caused by different operating methods of different operators and improving the accuracy and precision of tensile data. In addition, the tensile spline is placed on the marking assembly 4, and the marking of all marking positions can be completed at one time, eliminating repeated marking operations and improving work efficiency.

[0038] like Figure 1-Figure 3 As shown, in this embodiment, the support plate 1, the fixed plate 2 and the movable plate 3 are all set as a rectangular plate body. The upper surface of the support plate 1 in the figure is the first surface. The fixed plate 2 is fixedly connected to the support plate 1 at the left end of the upper surface of the support plate 1, parallel to the width direction of the support plate 1, and aligned with the left end face of the support plate 1. The length is smaller than the support plate 1, and symmetrical about the axis of the length direction of the support plate 1. The two movable plates 3 are located at the opposite ends of the extension direction of the fixed plate 2, and are plugged and connected with the fixed plate 2 respectively. The plug-in connection part is the existing overlapping part. The extension direction of the movable plate 3 is the same as that of the support plate 1, and the length is the same as that of the support plate 1. When the movable plate 3 is fully inserted into the fixed plate 2, the side of the movable plate 3 on both sides facing away from the central groove is flush with the side of the support plate 1. By pulling out the movable plate 3 to both sides, the width of the central groove can be increased, and by pushing the two movable plates 3 toward the middle, the width of the central groove can be reduced, so that the central groove can be suitable for stretch splines of different widths, and the stretch splines are effectively limited. The longitudinal center rod 41 is equal in length to the center groove, and the transverse center rod 42, the first scale rod 43, the second scale rod 44, the third scale rod 45 and the fourth scale rod 46 are all equal in width to the center groove when the movable plate 3 is fully inserted into the fixed plate 2. In this embodiment, the support plate 1 is 180 mm long and 5 mm high, the fixed plate 2 is 10 mm wide and 20.2 mm long, the movable plate 3 is 10 mm wide and 7 mm high, the center groove and the longitudinal center rod 41 are 170 mm long, the transverse center rod 42 is 20.2 mm long, the printing line assembly 4 is 3 mm high, the distance between the axis of the first scale rod 43 and the second scale rod 44 is 50 mm, and the distance between the axis of the third scale rod 45 and the fourth scale rod 46 is 116 mm. The printing line assembly 4 is made of hard material, which is wear-resistant and has good water absorption, and the engraved lines are fine and clear. The support plate 1, the fixed plate 2 and the movable plate 3 are made of stainless steel or other materials with good stability and good formability. The longitudinal center rod 41 and the transverse center rod 42 are connected to the support plate 1 in an inlaid manner or directly glued. According to the actual application, the sizes of the support plate 1, the fixed plate 2 and the movable plate 3 can be matched and adjusted, the fixed plate 2 and the movable plate 3 adopt an adaptive plug-in connection relationship, the distance between the first scale rod 43 and the second scale rod 44 can be adjusted, and the distance between the third scale rod 45 and the fourth scale rod 46 can be adjusted.

[0039] Optionally, the end of the movable plate 3 facing the fixed plate 2 is provided with a first plug-in portion 5, and the opposite ends of the fixed plate 2 in the extending direction are respectively provided with first plug-in holes, and the first plug-in portion 5 is plug-connected with the first plug-in holes; or, the opposite ends of the fixed plate 2 in the extending direction are provided with second plug-in portions (not shown), and the end of the movable plate 3 facing the fixed plate 2 is provided with a second plug-in hole, and the second plug-in portion is plug-connected with the second plug-in hole. The mating plug-in between the plug-in portion and the plug-in hole simplifies the plug-in connection relationship between the movable plate 3 and the fixed plate 2, facilitates the extraction or pushing operation, and can quickly adjust the width of the center groove.

[0040] like Figure 1 As shown, in this embodiment, the left ends of the two movable plates 3 are respectively fixed with the first plug-in parts 5 on one side end faces facing the fixed plate 2. Correspondingly, the end faces of the opposite ends of the fixed plate 2 are respectively provided with first plug-in holes, and the first plug-in parts 5 are inserted into the corresponding first plug-in holes to realize the plug-in connection between the movable plate 3 and the fixed plate 2. The first plug-in parts 5 on the two movable plates 3 can be arranged along a straight line, and the length of the first plug-in parts 5 is less than half the length of the fixed plate 2. In order to increase the range of pull-out, that is, to increase the adjustable range of the width of the central groove, the two first plug-in parts 5 can also be staggered, and the length of the first plug-in parts 5 is less than the length of the fixed plate 2. According to the actual application, the second plug-in parts can also be fixed at the opposite ends of the fixed plate 2. Correspondingly, the second plug-in holes are opened at the corresponding positions of the two movable plates 3, and the second plug-in parts are inserted into the corresponding second plug-in holes to realize the plug-in connection between the movable plate 3 and the fixed plate 2. The shapes and sizes of the first plug-in portion 5 and the second plug-in portion can be adjusted, for example, they can be a cuboid or a cylinder, and accordingly, the shapes and sizes of the first plug-in hole and the second plug-in hole are adjusted accordingly to ensure that the fixed plate 2 and the movable plate 3 can be stably plugged in.

[0041] Optionally, a first scale (not shown) is provided on the first plug-in portion 5; or, a second scale (not shown) is provided on the second plug-in portion. The scale is provided, and when the width of the stretched spline changes and the width of the center groove needs to be adjusted, the movable plate 3 is pulled outward, and the scale is exposed. By reading the scale value on the scale, the movable plate 3 can be accurately pulled out to a position matching the adjusted center groove width, and by observing the scale values ​​on the two first scales or the second scale, it can be ensured that the distances of the two movable plates 3 pulled out are equal, thereby ensuring that the longitudinal center rod 41 is located at the center position of the center groove, thereby corresponding to the center line of the stretched spline.

[0042] Optionally, the dimension measuring device for tensile performance test further includes a water-absorbing pad (not shown), which is laid between the bottom of the central groove and the printing line assembly 4. The water-absorbing pad is arranged so that the water-absorbing pad absorbs the printing material and then is laid in the central groove, and then the printing line assembly 4 is fixed on the water-absorbing pad. The printing line assembly 4 with good water absorption absorbs the printing material on the water-absorbing pad, and when the tensile spline is placed on the printing line assembly 4, a clear mark can be left on the tensile spline.

[0043] In this embodiment, the absorbent pad is made of absorbent cotton, 170 mm long and 20.2 mm wide. According to actual application conditions, the absorbent pad can be made of other materials as long as it has good enough water absorption and can provide printing material for the printing line component 4.

[0044] Optionally, the cross-sectional areas of the longitudinal center rod 41, the transverse center rod 42, the first scale rod 43, the second scale rod 44, the third scale rod 45 and the fourth scale rod 46 gradually decrease in the direction away from the bottom of the center groove. This arrangement allows each center rod and scale rod to have a smaller width at the end in contact with the stretch spline, thereby leaving a fine and clear print line on the stretch spline, and to have a sufficient width at the end in contact with the bottom of the center groove, thereby stably contacting the center groove.

[0045] like Figure 1-Figure 3 As shown, in this embodiment, the longitudinal center rod 41, the transverse center rod 42, the first scale rod 43, the second scale rod 44, the third scale rod 45 and the fourth scale rod 46 are all set to be triangular prisms, and the cross section is an equilateral triangle. One side of each triangular prism contacts the bottom of the center groove, thereby increasing the contact area between each center rod and the scale rod and the bottom of the center groove, and one edge of each triangular prism is set back to the bottom of the center groove, which is used to contact the stretch spline for marking. According to actual application conditions, each center rod and the scale rod can also be set to other shapes besides triangular prisms, as long as they can stably contact the bottom of the center groove and leave clear and detailed markings on the stretch spline.

[0046] Optionally, the width of the end of the first scale bar 43, the second scale bar 44, the third scale bar 45 and the fourth scale bar 46 away from the bottom of the central groove is less than 0.2 mm. This arrangement ensures that the marks left by each scale bar on the tensile specimen are sufficiently fine, providing an accurate clamping position for the tensile tester and the extensometer.

[0047] Optionally, the dimension measuring device for tensile performance testing further comprises a protective cover (not shown), which covers the central groove. This arrangement prevents dust and other debris from falling into the central groove or onto each central rod and scale rod, thereby preventing the accuracy of the marking from being affected.

[0048] In this embodiment, the protective cover is a transparent shell, and its size matches the size of the support plate 1. Figure 1 The upper middle portion is pressed downward to completely cover the support plate 1 .

[0049] Optionally, the first scale rod 43 and the second scale rod 44 are movably connected to the longitudinal center rod 41. This arrangement can flexibly adjust the positions of the first scale rod 43 and the second scale rod 44 according to the change of the clamping positions of the upper and lower clamps of the extensometer on different tensile splines, so that the first scale rod 43 and the second scale rod 44 are moved to the desired positions along the longitudinal center rod 41.

[0050] Depending on the actual application, any movable connection method can be adopted between the first scale rod 43 and the second scale rod 44 and the longitudinal center rod 41, as long as the positions of the first scale rod 43 and the second scale rod 44 on the longitudinal center rod 41 can be adjusted.

[0051] Optionally, the third scale rod 45 and the fourth scale rod 46 are movably connected to the longitudinal center rod 41. This arrangement can flexibly adjust the positions of the third scale rod 45 and the fourth scale rod 46 according to the change of the clamping positions of the upper and lower clamps of the testing machine on different tensile splines, so that the third scale rod 45 and the fourth scale rod 46 move to the desired position along the longitudinal center rod 41.

[0052] Depending on the actual application, any movable connection method can be adopted between the third scale rod 45 and the fourth scale rod 46 and the longitudinal center rod 41, as long as the positions of the third scale rod 45 and the fourth scale rod 46 on the longitudinal center rod 41 can be adjusted.

[0053] Optionally, the side wall of the movable plate 3 facing the center groove is marked with scale values. The position of the transverse center rod 42 is the scale zero value, and the scale values ​​gradually increase along the extension direction of the longitudinal center rod 41 on both sides of the transverse center rod 42. By reading the scale values ​​corresponding to the first scale rod 43, the second scale rod 44, the third scale rod 45 and the fourth scale rod 46, the distance between the first scale rod 43 and the second scale rod 44 and the transverse center rod 42, and the distance between the third scale rod 45 and the fourth scale rod 46 and the transverse center rod 42 can be intuitively known, and then it can be known whether the specifications of the printed line assembly 4 meet the tensile test requirements. When the first scale rod 43, the second scale rod 44, the third scale rod 45 and the fourth scale rod 46 can move relative to the longitudinal center rod 41, by reading the scale values, each scale rod can be quickly and accurately moved to the desired new position.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dimension measuring device for tensile performance testing, characterized in that: include: A support plate, wherein the support plate is provided with a first surface; a fixing plate, the fixing plate being fixedly connected to the first surface; Two movable plates, the two movable plates are plug-connected with opposite ends of the fixed plate in the extending direction and abut against the first surface, and the support plate, the fixed plate and the two movable plates enclose a central groove; A printing line component, the printing line component comprising: A longitudinal center rod, the longitudinal center rod is fixedly connected to the bottom of the center groove, extends along the length direction of the center groove, and divides the width of the center groove equally; A transverse center rod, the transverse center rod is vertically connected to the longitudinal center rod and fixedly connected to the bottom of the center groove and equally divides the length of the center groove; A first scale rod and a second scale rod, wherein the first scale rod and the second scale rod are arranged in the central groove, are respectively vertically connected to the longitudinal central rod, and are symmetrically arranged with respect to the transverse central rod; The third scale rod and the fourth scale rod are arranged in the central groove, are respectively vertically connected to the longitudinal central rod, and are symmetrically arranged about the transverse central rod.

2. The dimension measuring device for tensile property testing according to claim 1, characterized in that: The movable plate is provided with a first plug-in portion at one end thereof facing the fixed plate, and first plug-in holes are respectively provided at two opposite ends of the fixed plate in the extending direction, and the first plug-in portion is plug-connected with the first plug-in hole; or, The fixed plate is provided with second plug-in parts at two opposite ends in the extension direction, and the movable plate is provided with a second plug-in hole at one end facing the fixed plate, and the second plug-in part is plug-connected with the second plug-in hole.

3. The dimension measuring device for tensile property testing according to claim 2, characterized in that: The first plug-in portion is provided with a first scale; or, The second plug-in portion is provided with a second scale.

4. The dimension measuring device for tensile property testing according to any one of claims 1 to 3, characterized in that: Also includes: A water-absorbing pad is laid between the bottom of the central groove and the printing line assembly.

5. The dimension measuring device for tensile property testing according to any one of claims 1 to 3, characterized in that: The cross-sectional areas of the longitudinal center rod, the transverse center rod, the first scale rod, the second scale rod, the third scale rod and the fourth scale rod gradually decrease in a direction away from the bottom of the central groove.

6. The dimension measuring device for tensile property testing according to any one of claims 1 to 3, characterized in that: The width of the end portions of the first scale rod, the second scale rod, the third scale rod and the fourth scale rod away from the bottom of the central groove is less than 0.2 mm.

7. The dimension measuring device for tensile property testing according to any one of claims 1 to 3, characterized in that: Also includes: A protective cover is provided to cover the central groove.

8. The dimension measuring device for tensile property testing according to any one of claims 1 to 3, characterized in that: The first scale rod and the second scale rod are movably connected to the longitudinal center rod.

9. The dimension measuring device for tensile property testing according to any one of claims 1 to 3, characterized in that: The third scale rod and the fourth scale rod are movably connected to the longitudinal center rod.

10. The dimension measuring device for tensile property testing according to any one of claims 1 to 3, characterized in that: Scale values ​​are marked on the side wall of the movable plate facing the central groove.

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