A device for marking gauge length of batch tensile specimens

Abstract

The present invention discloses a device for marking gauges on batch tensile specimens, which belongs to the technical field of devices for marking gauges on tensile specimens. It solves the problem that existing devices for marking gauges on tensile specimens are complex in structure and cannot accurately and efficiently mark gauge lines on batch tensile specimens. The device for marking gauges on batch tensile specimens of the present invention includes a support unit, a sample placement unit, a gauge unit, and a marking unit. The sample placement unit, the gauge unit, and the marking unit are all arranged on the support unit. The sample placement unit is used to fix the tensile specimen. The gauge unit is used to mark the tensile specimen. The marking unit is used to mark the tensile specimen after marking. The gauge unit is arranged at a higher height in the vertical direction than the sample placement unit. The present invention can mark gauge lines on batch tensile specimens of different specifications and styles, and is not only efficient but also highly accurate.

Description

Technical Field

[0001] The invention relates to the technical field of tensile specimen gauge marking devices, in particular to a batch tensile specimen gauge marking device. Background Art

[0002] Tensile testing is one of the most common methods for testing the mechanical properties of materials. Among them, the elongation after fracture is the ratio of the elongation of the original gauge length after fracture to the original gauge length, which is an important indicator for evaluating the plasticity of materials.

[0003] In the prior art, the original gauge length of tensile specimens is generally determined by hand-marking with a caliper, a dedicated gauge dotting machine, or laser marking. Among them, hand-marking with a caliper can only mark one tensile specimen at a time, which is time-consuming and inefficient. At the same time, manual operation requires high operator proficiency and operating specifications, and is prone to large errors and low accuracy. A dedicated gauge dotting machine is prone to deep marking and damage to the metal surface, thereby accelerating the fracture of the tensile specimen and causing inaccurate experimental data. The laser marking device uses a laser beam to illuminate the sample surface to mark the gauge length. This device is expensive and the laser is prone to malfunction, affecting the progress of the test. Summary of the Invention

[0004] In view of the above analysis, the present invention aims to provide a batch tensile specimen marking device to solve the problem that the existing tensile specimen marking device has a complex structure and cannot accurately and efficiently mark the batch tensile specimens with gauge lines.

[0005] The purpose of the present invention is mainly achieved through the following technical solutions:

[0006] In one aspect, the present invention provides a batch tensile specimen gauge marking device, the gauge marking device comprising a support unit, a sample placement unit, a gauge unit, and a marking unit;

[0007] The sample placement unit, gauge unit and marking unit are all arranged on the support unit. The sample placement unit is used to fix the tensile specimen; the gauge unit is used to measure the tensile specimen; and the marking unit is used to mark the tensile specimen after measuring the length.

[0008] The setting height of the gauge unit in the vertical direction is higher than that of the sample setting unit.

[0009] In one possible design, the support unit includes a rectangular base;

[0010] The sample placement unit includes a first sample placement table and a second sample placement table with the same structure. The first sample placement table and the second sample placement table are arranged parallel to the length direction of the base. The tensile sample is fixed between the first sample placement table and the second sample placement table and is perpendicular to both.

[0011] In one possible design, the support unit further includes a first base guide rail and a second base guide rail, and the first base guide rail and the second base guide rail are arranged in parallel along the width direction of the base;

[0012] Both ends of the first sample placement table and the second sample placement table are slidably connected to the first base guide rail and the second base guide rail; the first sample placement table and the second sample placement table can slide toward or in opposite directions along the first base guide rail and the second base guide rail.

[0013] In one possible design, both ends of the bottom of the first sample placement table and the second sample placement table are provided with guide rail grooves; the two ends of the bottom of the first sample placement table are respectively assembled with the first base guide rail and the second base guide rail through the guide rail grooves, and similarly, the two ends of the bottom of the second sample placement table are respectively assembled with the first base guide rail and the second base guide rail through the guide rail grooves.

[0014] In a possible design, the gauge unit includes a gauge block, a first scale base and a second scale base having the same structure and arranged parallel to each other.

[0015] In one possible design, the first scale base and the second scale base are respectively arranged at both ends of the base along the width direction of the base, the gauge block is arranged between the first scale base and the second scale base along the length direction of the base, and the gauge block is slidably connected to the first scale base and the second scale base.

[0016] In one possible design, the gauge unit further includes a positioning cursor;

[0017] The positioning cursors are arranged at both ends of the gauge block. The positioning cursors are provided with rectangular cavity slide rails, which are nested in the first scale seat and the second scale seat.

[0018] In one possible design, the marking unit includes a first marking assembly and a second marking assembly having the same structure and composition; the first marking assembly is arranged on a first sample placement table, and the second marking assembly is arranged on a second sample placement table; the first marking assembly and the second marking assembly are used to mark the gauge positions at both ends of the tensile specimen.

[0019] In one possible design, the first scribing assembly includes a first sample placement platform guide rail, a movable groove, a scribing knife, and a scribing knife fixing block; the first sample placement platform guide rail is arranged perpendicular to the movable groove;

[0020] The first sample placement table guide rail is provided on the first sample placement table, and a first groove is provided at the bottom end of the movable groove, and the movable groove is nested on the first sample placement table guide rail through the first groove;

[0021] The marking knife is arranged on the marking knife fixing block, and the marking knife fixing block is arranged on the moving groove.

[0022] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0023] (1) The present invention adopts a first sample placement table and a second sample placement table for placing batch tensile specimens and a slidable marking knife, which can quickly and efficiently complete the marking of batch tensile specimen gauges at the same time.

[0024] (2) The first sample placement table and the second sample placement table of the present invention are provided with a V-shaped groove and a straight-shaped table on the fixed part, which can meet the requirements of gauge marking of various specifications of tensile specimens such as circular cross-section, rectangular cross-section, and round tube.

[0025] (3) The present invention has a simple structure, is easy to operate, has low requirements for supporting conditions, has strong environmental applicability, low manufacturing cost, and high precision. It can efficiently mark the gauge lengths of tensile specimens in batches, meeting the requirements for marking the gauge lengths of tensile specimens of various specifications and styles.

[0026] In the present invention, the above-mentioned technical solutions can be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages will become apparent from the description or be understood through practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the embodiments of the description and the contents particularly pointed out in the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like parts throughout the drawings.

[0028] Figure 1 It is a schematic diagram of the overall structure of the batch tensile specimen gauge marking device of the present invention;

[0029] Figure 2 The structure diagram of the first sample station Figure 1 ;

[0030] Figure 3 It is a structural diagram of the gauge block and positioning cursor;

[0031] Figure 4 It is a structural diagram of the line unit;

[0032] Figure 5 Schematic diagram of the structure of the scribing knife;

[0033] Figure 6 for Figure 5 Left view of;

[0034] Figure 7 A schematic diagram of the structure of a non-proportional rectangular cross-section machined specimen provided in Example 1;

[0035] Figure 8 A schematic diagram of the structure of a machined sample with a proportional circular cross section provided in Example 2;

[0036] Figure 9 A schematic diagram of the structure of an unprocessed sample with a regular hexagonal cross-section provided in Example 3;

[0037] Figure 10 This is a schematic diagram of the structure of the regular hexagonal cross-section provided in Example 3 after the sample is not processed and the gauge line is drawn;

[0038] Figure 11 A schematic structural diagram of a circular tube segment sample provided in Example 4;

[0039] Figure 12 The structure diagram of the first sample station Figure 2 ;

[0040] Figure 13 This is a structural diagram of the V-shaped groove and the I-shaped platform on the first sample placement platform.

[0041] Reference numerals:

[0042] 1-base, 2-first sample placement table; 3-second sample placement table; 4-first base guide rail; 5-second base guide rail; 6-first sample placement table guide rail; 7-second sample placement table guide rail; 8-first marking assembly; 9-second marking assembly; 10-first scale seat; 11-second scale seat; 12-gauge block; 13-positioning cursor; 14-positioning screw; 15-support part; 16-fixing part; 17-V-shaped groove; 18-V-shaped support arm; 19-I-shaped table; 20-first fastening screw; 21-moving groove; 22-connecting rod; 23-compression spring; 24-slider; 25-marking knife; 26-marking knife fixing block; 27-second fastening screw. DETAILED DESCRIPTION

[0043] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0044] On the one hand, the present invention provides a batch tensile specimen gauge marking device, which is used to calibrate the original gauge length of tensile specimens in material mechanics tensile specimens; the gauge marking device includes a support unit, a sample placement unit, a gauge unit and a marking unit; the sample placement unit, the gauge unit and the marking unit are all arranged on the support unit, the sample placement unit is used to fix the tensile specimen; the gauge unit is used to measure the tensile specimen; the marking unit is used to mark the tensile specimen after measurement; the gauge unit is set at a higher height in the vertical direction than the sample placement unit.

[0045] Specifically, if Figures 1 to 4As shown, the sample placement unit, gauge unit and marking unit of the present invention are all arranged on the supporting unit; wherein, the batch tensile specimens are fixed on the sample placement unit, the gauge units are arranged at both ends of the sample placement unit to draw gauge lines on the batch tensile specimens, and the marking unit is arranged above the sample placement unit and perpendicular to the sample placement unit, and the marking unit can move above the sample placement unit to mark gauge lines on the batch tensile specimens.

[0046] Compared with the prior art, the present invention can place batches of tensile specimens to be marked by setting a sample placement unit. The device of the present invention can simultaneously and quickly and efficiently complete the marking of the tensile specimens in batches.

[0047] In order to more stably fix the tensile specimen, the support unit of the present invention includes a rectangular base 1; the sample placement unit includes a first sample placement table 2 and a second sample placement table 3 with the same structure. The first sample placement table 2 and the second sample placement table 3 are arranged parallel to each other along the length direction of the base 1, and the tensile specimen is fixed parallel to and perpendicular to the first sample placement table 2 and the second sample placement table 3.

[0048] Specifically, if Figure 1 As shown, the supporting unit includes a rectangular base 1, and the sample placing unit is arranged above the base 1 along the length direction of the base 1. The sample placing unit includes a first sample placing table 2 and a second sample placing table 3. The first sample placing table 2 and the second sample placing table 3 are parallel to each other. The batch of tensile specimens are placed between the first sample placing table 2 and the second sample placing table 3 and are fixed. The batch of tensile specimens are parallel to each other and are all on the same horizontal plane. After the marking position of the batch of tensile specimens is marked with the gauge unit, the marking unit is moved above the sample placing unit to mark the batch of tensile specimens.

[0049] Compared with the prior art, the present invention can firmly fix batches of tensile specimens through the first sample placement table 2 and the second sample placement table 3, and use the marking unit to mark the batches of tensile specimens, thereby improving the efficiency of marking the tensile specimen gauge length.

[0050] In order to enable the first sample placement table 2 and the second sample placement table 3 to move relative to each other to adjust the distance between them, so that they can fix tensile specimens of different specifications and sizes, the support unit of the present invention also includes a first base guide rail 4 and a second base guide rail 5, and the first base guide rail 4 and the second base guide rail 5 are arranged parallel to the width direction of the base 1; both ends of the first sample placement table 2 and the second sample placement table 3 are slidably connected to the first base guide rail 4 and the second base guide rail 5; the first sample placement table 2 and the second sample placement table 3 can slide toward or in opposite directions along the first base guide rail 4 and the second base guide rail 5.

[0051] It should be noted that both ends of the bottom of the first sample placement table 2 and the second sample placement table 3 are provided with guide rail grooves; the two ends of the bottom of the first sample placement table 2 are respectively assembled with the first base guide rail 4 and the second base guide rail 5 through the guide rail grooves; similarly, the two ends of the bottom of the second sample placement table 3 are also respectively assembled with the first base guide rail 4 and the second base guide rail 5 through the guide rail grooves.

[0052] Specifically, if Figure 1 As shown, the first base guide rail 4 and the second base guide rail 5 are arranged in parallel between the first sample placement table 2 and the second sample placement table 3; wherein, the vertical section of the first base guide rail 4 and the second base guide rail 5 along the length direction of the base 1 is an inverted trapezoidal shape, and the guide rail grooves at both ends of the bottom of the first sample placement table 2 and the second sample placement table 3 are inverted trapezoidal guide rail grooves. The first sample placement table 2 and the second sample placement table 3 are nested on the first base guide rail 4 and the second base guide rail 5 through the inverted trapezoidal guide rail grooves at both ends thereof. The first sample placement table 2 and the second sample placement table 3 can slide toward or in the opposite direction along the first base guide rail 4 and the second base guide rail 5, thereby adjusting the distance between the first sample placement table 2 and the second sample placement table 3, so that the first sample placement table 2 and the second sample placement table 3 can be suitable for tensile specimens of different specifications and sizes.

[0053] It should also be noted that lubricating oil is applied between the inverted trapezoidal guide grooves at the bottom of the first sample placing guide rail and the second sample placing guide rail and the corresponding first base guide rail 4 and second base guide rail 5, so that the inverted trapezoidal guide grooves can slide smoothly. The length of the first base guide rail 4 and the second base guide rail 5 along the length direction of the guide rail can meet and guarantee the use of tensile specimens specified in all standards.

[0054] Compared with the prior art, the present invention arranges a first base guide rail 4 and a second guide rail on the base 1 to adjust the distance between the first sample placement platform 2 and the second sample placement platform 3, so that the sample placement unit can be suitable for tensile specimens of different specifications, thereby ultimately improving the applicability of the batch tensile specimen gauge marking device.

[0055] It should be noted that, since the first sample placement table 2 and the second sample placement table 3 have the same structure and are symmetrically arranged when placed, the first sample placement table 2 is taken as an example to illustrate its specific structure, and the structure of the second sample placement table 3 is not repeated.

[0056] The first sample placement platform 2 of the present invention includes an integrally formed fixing portion 16 and a supporting portion 15. The fixing portion 16 is lower than the supporting portion 15 and is used to secure the tensile specimen's support portion, while the supporting portion 15 supports the marking unit. When the first sample placement platform 2 is secured to the base 1, the fixing portion 16 is located on the inside and the supporting portion 15 is located on the outside. This means that the distance between the fixing portions 16 of the first and second sample placement platforms 2 and 3 is smaller than the distance between their supporting portions 15.

[0057] It should also be noted that both ends of the first sample placing table 2 and the second sample placing table 3 are provided with threaded holes, and the first fastening screws 20 are provided in the threaded holes. The first sample placing table 2 and the second sample placing table 3 are fixed to the base 1 by the first fastening screws 20, thereby reducing the shaking of the two sample placing tables and enabling them to stably fix the tensile specimens.

[0058] When it is necessary to adjust the distance between the first sample placement table 2 and the second sample placement table 3, unscrew the first fastening screws 20 at both ends of the first sample placement table 2 and the second sample placement table 3, so that the first fastening screws 20 are in a loose state. At this time, a force in the direction or in the opposite direction is applied to the first sample placement table 2 and the second sample placement table 3, so that the first sample placement table 2 and the second sample placement table 3 both slide along the first base guide rail 4 and the second base guide rail 5. After the set distance is adjusted, the first fastening screws 20 are screwed to tighten the first fastening screws 20. At this time, the positions of the first sample placement table 2 and the second sample placement table 3 are fixed, thereby completing the adjustment of the distance between the first sample placement table 2 and the second sample placement table 3.

[0059] Compared with the prior art, the present invention can place batches of tensile specimens by setting up two symmetrical sample placement tables; by adjusting the spacing between the first sample placement table 2 and the second sample placement table 3, it can be suitable for tensile specimens of different specifications and sizes; by using the gauge unit to determine the gauge position of the tensile specimen, and finally using the marking unit to mark the tensile specimen, the gauge marking is finally completed.

[0060] It should be emphasized that in order to improve the applicability of the gauge marking device and make it suitable for different types of tensile specimens, such as Figure 2 、 Figure 12 and Figure 13As shown, the fixing portion 16 of the present invention is provided with a row of continuous V-shaped grooves and a row of discontinuous I-shaped platforms 18; wherein, the continuous V-shaped grooves constitute a serrated fixing structure, and the V-shaped grooves are mainly used to fix tensile specimens with circular cross-sections and circular tubular ends. The supporting portions at both ends of the circular cross-section and circular tubular tensile specimens are located in the V-shaped grooves. The V-shaped grooves, with the cooperation of the clamping force between the two symmetrical support portions 15, can fix the batch tensile specimens placed between the two sample placement platforms to prevent the tensile specimens from rolling; in addition, the V-shaped grooves are suitable for all tensile specimens with circular cross-sections and circular tubular shapes. The outer side of the V-shaped groove is adjacent to the support portion 15, and the inner side is a straight platform 18. The bottoms of the two supporting surfaces of the V-shaped groove (the two inclined surfaces constituting the V-shaped groove) extend inward to form V-shaped support arms. The V-shaped groove and the V-shaped support arms are both used to support and fix the supporting portion of the tensile specimen. The straight platform 18 is located between two adjacent V-shaped support arms. The straight platform 18 is mainly used to support tensile specimens with rectangular or polygonal cross-sections. In terms of spatial position, the straight platform 18 and the V-shaped groove 17 are distributed in an alternating manner. When marking the tensile specimen with a rectangular or polygonal cross-section, the supporting parts at both ends of the tensile specimen are placed on the corresponding straight platform 18 surface. The gap between the two adjacent straight platforms 18, i.e., the V-shaped support arm, can prevent the tensile specimens from overlapping. Combined with the clamping force between the two symmetrical sample placement platforms, the rectangular cross-section specimen can be fixed.

[0061] It should be noted that the lengths of the first sample placement platform 2 and the second sample placement platform 3 can be increased or decreased according to usage requirements, and the number of V-shaped grooves 17 and straight-shaped platforms 18 can be increased or decreased.

[0062] Compared with the prior art, the first sample placement platform 2 and the second sample placement platform 3 of the present invention are alternately provided with V-shaped grooves 17 and I-shaped platforms 18 on the fixing parts 16, which can meet the requirements of gauge marking of various specifications of tensile specimens such as circular cross-section, rectangular cross-section, and round tubes.

[0063] In order to mark batches of tensile specimens, the gauge unit of the present invention includes a gauge block 12, a first scale base 10 and a second scale base 11 of identical structure and parallel to each other; wherein the first scale base 10 and the second scale base 11 are respectively arranged at both ends of the base 1 along the width direction of the base 1, and the gauge block 12 is arranged between the first scale base 1 and the second scale base 1 along the length direction of the base 1, and the gauge block 12 is slidably connected to the first scale base 1 and the second scale base 1.

[0064] Specifically, if Figure 1 and Figure 3As shown, the gauge unit of the present invention includes a gauge block 12, a first scale base 10 and a second scale base 11; wherein the first scale base 10 and the second scale base 11 are arranged parallel to each other at both ends of the base 1, and the first scale base 10 and the second scale base 11 are bent upward to a certain height in the vertical direction, and the height of the first scale base 10 and the second scale base 11 in the vertical direction is greater than the support portion 15 of the first sample placement table 2 and the second sample placement table 3; the first scale base 10 and the second scale base 11 are arranged parallel to each other at both ends of the base 1. The first scale base 10 is arranged on the outside of the first sample placement table 2 and the second sample placement table 3 along the length direction of the base 1; along the width direction of the base 1, the first scale base 10 is arranged on the outside of the first base guide rail 4, the second scale base 11 is arranged on the outside of the second base guide rail 5, and the gauge block 12 is arranged between the first scale base 10 and the second scale base 11; in addition, the gauge block 12 is parallel to the first sample placement table 2 and the second sample placement table 3, and the two ends of the gauge block 12 are slidably connected to the first scale base 10 and the second scale base 11.

[0065] Compared with the prior art, the first scale base 10 and the second scale base 11 of the present invention are engraved with clear scales. When it is necessary to draw gauge lines on tensile specimens of different specifications and sizes, since the two ends of the gauge block 12 are slidably connected to the first scale base 10 and the second scale base 11 respectively, the gauge lines can be drawn on tensile specimens of different specifications and sizes by moving the position of the gauge block 12.

[0066] It should be emphasized that the gauge unit of the present invention also includes a positioning cursor 13; the positioning cursor 13 is arranged at both ends of the gauge block 12, and a rectangular cavity slide is provided on the positioning cursor 13, which is nested in the first scale seat 10 and the second scale seat 11.

[0067] Specifically, if Figure 3 As shown, positioning cursors 13 of identical structure are respectively provided at both ends of the gauge block 12. The positioning cursors 13 are in the shape of a cuboid and are provided with rectangular cavity slides. The two rectangular cavity slides are correspondingly nested in the first scale base 10 and the second scale base 11. The two positioning cursors 13 are fixedly connected to the ends of the gauge block 12 by bolts.

[0068] It should also be pointed out that a threaded hole is provided on the side of the positioning cursor 13 away from the gauge block 12, and a positioning screw 14 is provided in the threaded hole. When the positioning screw 14 is in a tightened state, both ends of the positioning cursor 13 are locked. At this time, the position of the gauge block 12 is fixed, ensuring that the positioning cursor 13 and the gauge block 12 will not loosen or swing left and right after assembly; when the positioning screw 14 is in a loosened state, the positioning cursor 13 is moved on the first scale seat 10 and the second scale seat 11 to determine the gauge line position according to the specifications and dimensions of the tensile specimen.

[0069] It should be noted that lubricating oil is applied between the two positioning cursors 13 and the first scale seat 10 and the second scale seat 11 , so that the two positioning cursors 13 can slide flexibly in the same direction along their corresponding scale seats.

[0070] It should be emphasized that if Figure 3 As shown, in the width direction of the base 1, the two end faces of the positioning cursor 13 perpendicular to the first scale seat 10 and the second scale seat 11 and the corresponding side faces of the gauge block 12 parallel to the first sample placement platform 2 and the second sample placement platform 3 are in the same plane. The purpose of this arrangement is to ensure that the position of the tensile specimen is the scale position displayed by the positioning cursor 13 on the two scale seats.

[0071] It should also be pointed out that in the width direction of the base 1, the verticality, surface roughness, flatness and straightness of the two end surfaces of the positioning cursor 13 perpendicular to the first scale seat 10 and the second scale seat 11 all meet the standard requirements of the ruler.

[0072] In order to mark batch tensile specimens, the marking unit of the present invention includes a first marking assembly 8 and a second marking assembly 9 having the same structure and composition; the first marking assembly 8 is arranged on the first sample placement table 2, and the second marking assembly 9 is arranged on the second sample placement table 3; the first marking assembly 8 and the second marking assembly 9 are used to mark the gauge positions at both ends of the tensile specimen.

[0073] Specifically, if Figure 4 As shown, the first marking assembly 8 is arranged on the first sample placement table 2 and is arranged perpendicular to the first sample placement table 2. The first marking assembly 8 can slide along the length direction of the first sample placement table 2 to mark the gauge line on one end of the tensile specimen; the second marking assembly 9 is arranged on the second sample placement table 3 and is arranged perpendicular to the second sample placement table 3. The second marking assembly 9 can slide along the length direction of the second sample placement table 3 to mark the gauge line on the other end of the tensile specimen.

[0074] Compared with the prior art, the present invention can mark the two ends of the tensile specimen by providing the first marking assembly 8 and the second marking assembly 9, and can meet the needs of marking the gauge lines of tensile specimens of various specifications and styles.

[0075] It should be noted that the first marking assembly 8 of the present invention includes a first sample placement table guide rail 6 and a movable groove 21; the first sample placement table guide rail 6 is arranged vertically to the movable groove 21; the first sample placement table guide rail 6 is arranged on the first sample placement table 2, and a first groove is provided at the bottom end of the movable groove 21, and the movable groove 21 is nested on the first sample placement table guide rail 6 through the first groove.

[0076] Specifically, if Figure 4As shown, since the structures of the first scribing assembly 8 and the second scribing assembly 9 are identical, the first scribing assembly 8 will be used as an example to illustrate its structure. The first sample platform guide rail 6 is provided on the top surface of the first sample platform 2 along its length. The vertical cross-section along the width direction of the first sample platform guide rail 6 is an inverted trapezoidal shape. The first groove at the bottom end of the movable groove 21 is an inverted trapezoidal shape that matches the first sample platform guide rail 6. The movable groove 21 is nested in the first sample platform guide rail 6 through the first groove. The movable groove 21 can slide on the first sample platform guide rail through the first groove to perform scribing on batch tensile specimens.

[0077] Compared with the prior art, the first scribing assembly 8 and the second scribing assembly 9 of the present invention have simple structures and can realize the scribing action of the scribing assembly.

[0078] It should be noted that the first sample placement table guide rail 6 and the second sample placement table guide rail 3 are both fixed to the corresponding sample placement table by bolts, and the bolt fixation facilitates installation and disassembly.

[0079] In order to mark the gauge length of batch tensile specimens, the first marking assembly 8 of the present invention also includes a marking knife 25, a marking knife fixed block 26, a connecting rod 22, a compression spring 23 and a slider 24; wherein, the marking knife 25 is arranged on the marking knife fixed block 26, the marking knife fixed block 26 is arranged on the movable groove 21, a second slide groove is provided on the top of the movable groove 21, and the slider 24 is embedded in the second slide groove; the marking knife fixed block 26 is provided on the top surface of the slider 24; a circular hole baffle is provided at one end of the second slide groove, the connecting rod 22 includes a movable end and a fixed end, the connecting rod 22 passes through the circular hole baffle, and its fixed end is fixedly connected to the marking knife fixed block 26, and the movable end of the connecting rod 22 is arranged outside the circular hole baffle; the compression spring 23 is sleeved on the connecting rod 22 and is located between the circular hole baffle and the marking knife fixed block 26.

[0080] Specifically, if Figure 4As shown, the above-mentioned slider 24 is a trapezoidal slider 24, the marking knife fixing block 26 is arranged on the top surface of the slider 24, the second slide groove is a trapezoidal slide groove, the second slide groove is perpendicular to the first slide groove, that is, the second slide groove is arranged parallel to the first sample table 2 track, the trapezoidal slider 24 matches the shape and size of the trapezoidal second slide groove, the trapezoidal slider 24 is nested in the trapezoidal second slide groove, the trapezoidal slider 24 can drive the marking knife fixing block 26 to slide along the second slide groove, one end of the second slide groove (away from the marking knife fixing block 26) is provided with a round hole baffle, and the fixed end of the connecting rod 22 passes through The circular hole baffle is threadedly connected to the marking knife fixed block 26, and the compression spring 23 is sleeved on the connecting rod 22 and is located between the circular hole baffle and the marking knife fixed block 26. The moving end of the connecting rod 22 can move relative to the circular hole baffle under the action of the compression spring 23; the compression spring 23 can apply a force toward the direction of the gauge block 12 to the slider 24 and the marking knife fixed block 26, and at the same time, the gauge block 12 applies a reverse force to the marking knife 25 by resisting it, so that the marking knife 25 can maintain a stable state of force balance at any position parallel to the sliding direction of the slider 24.

[0081] When marking gauge lines on a tensile specimen, compression spring 23 applies pressure to marking blade fixed block 26 toward gauge block 12. Marking blade fixed block 26 drives slider 24 toward gauge block 12, causing marking blade 25 to rest against gauge block 12 for a tight fit. The upper and lower spatial positions of marking blade 25 on marking blade fixed block 26 are adjusted to contact the tensile specimen. Sliding slot 21 allows marking blade 25 to mark gauge lines on the tensile specimen. The position of gauge block 12 is adjusted so that marking blade 25 in second marking assembly 9 marks gauge lines at corresponding positions on the tensile specimen. The distance between the two gauge lines is the gauge length of the tensile specimen.

[0082] It should be noted that a threaded hole and a marking knife 25 fixing hole are provided on the end of the marking knife fixing block 26 away from the compression spring 23. The marking knife 25 fixing hole is arranged in the vertical direction. The threaded hole is connected to the marking knife 25 fixing hole and the two are perpendicular to each other. After the marking knife 25 is inserted into the marking knife 25 fixing hole, the marking knife 25 can be fixed by fixing the second fastening screw 27 into the threaded hole to prevent it from shaking in the vertical direction.

[0083] In order to adapt to marking gauge lines of tensile specimens of various specifications, the marking knife 25 can be adjusted in upper and lower spatial positions by the second fastening screw 27, so that the blade of the marking knife 25 is in different positions, and the replacement of the marking knife 25 is also convenient.

[0084] like Figure 5 and Figure 6As shown, the marking knife 25 includes a blade head and a handle, wherein the handle is semi-cylindrical and includes a semi-cylindrical surface and a rectangular surface along the length direction of the handle. The semi-cylindrical surface is located at the end away from the second fastening screw 27, and the rectangular surface is located at the end close to the second fastening screw 27. The root of the blade head (the end away from the handle) is provided with two inclined surfaces, so that the root of the blade head forms a blade tip. The blade tip and the rectangular surface of the handle are coplanar, which is used to ensure the marking precision and accuracy of the marking knife 25. In addition, the purpose of providing the blade tip is to prevent the blade head from interfering with the tensile specimen when marking the gauge line, while reducing wear on the tensile specimen.

[0085] In summary, the present invention can process tensile specimens in batches with short time consumption and high efficiency. In addition, the present invention fixes the marking knife 25 by a marking fixing block, so that the tip of the marking knife 25 marks the gauge line on the tensile specimen with small error, high accuracy and precision. Furthermore, the device of the present invention has a simple structure, is easy to operate, has low requirements for supporting conditions, has no special requirements for the environment, and has low manufacturing cost, and can meet the needs of marking gauge lines on tensile specimens of different specifications and styles.

[0086] It should be noted that before using the marking knife 25 to mark the tensile specimen, the surface of the tensile specimen should be painted along the gauge block 12 with a thick marker pen. The purpose is: on the one hand, the gauge line is more obvious on the black marker mark, which is convenient for measuring the post-fracture gauge length after the tensile specimen is broken; on the other hand, when the tensile specimen is marked with a scale knife, the scratches will be formed on the thick marker ink, which can avoid damage to the surface of the tensile specimen and make the experimental data more accurate.

[0087] Example 1

[0088] The specifications and shapes of the tensile specimens in the embodiments of the present invention are prepared in accordance with the requirements of GB / T228.1-2021.

[0089] The tensile specimen to be marked with gauge lines in this embodiment is a non-proportional rectangular cross-section machined tensile specimen, such as Figure 7 As shown, the original thickness of the tensile specimen is 3 mm, the original width is 12.5 mm, the original gauge length is 50 mm, and the parallel length is 75 mm.

[0090] When using the apparatus of the present invention to mark a tensile specimen, the two supporting portions of the tensile specimen should first be placed on the straight-line platforms 18 on the surfaces of the first and second sample holders 2 and 3, respectively, with the tensile specimens arranged in parallel. The relative positions of the two sample holders are adjusted according to the total length of the tensile specimen. After ensuring that the two sample holders are holding the tensile specimen, the first fastening screws 20 on the sides of the two sample holders are tightened to maintain the position of the two sample holders, thereby keeping the tensile specimen firmly fixed.

[0091] After the tensile specimen is fixed, the positioning cursors 13 at both ends of the gauge block 12 are moved on the two scale bases. To reduce the risk of the tensile specimen breaking outside the gauge lines, the gauge lines should be distributed as symmetrically as possible around the center of the tensile specimen. Therefore, the center position of the tensile specimen is found using the scale values ​​on the two scale bases. The scale value here is recorded as X mm. The positioning cursor 13 is moved to the (X-25) mm scale value. The positioning screw 14 of the positioning cursor 13 is tightened. The positioning cursor 13 is locked and fixed in position. According to the position of the gauge block 12, the slider 24 is moved. The slider 24 drives the marking knife fixed block 26 to move, so that one side of the marking knife 25 contacts the gauge block 12. Due to the combined effect of the elastic force applied by the compression spring 23 on the connecting rod 22 on the marking knife fixed block 26 and the reverse force applied by the gauge block 12 on the marking knife 25, the marking knife 25 now maintains a stable state of force balance parallel to the sliding direction of the slider 24.

[0092] Adjust the upper and lower spatial positions of the marking knife 25 according to the height of the tensile specimen, tighten the second fastening nut, and secure the marking knife 25. Before using the marking knife 25 to mark the tensile specimen, you should first use a thick marker pen to mark the surface of the tensile specimen along the gauge block 12. The purpose is: on the one hand, the gauge line is more obvious on the black marker mark, which is convenient for measuring the gauge length after the tensile specimen breaks; on the other hand, when using the scale knife to mark the tensile specimen, the scratch will be formed on the thick marker ink, which can avoid damage to the surface of the tensile specimen and make the experimental data more accurate. Slide the movable slot 21 to complete one of the gauge lines at the (X-25) mm position. Move the positioning cursor 13 to the (X+25) mm scale value, tighten the positioning screw 14 of the positioning cursor 13, and the positioning cursor 13 is locked and fixed in position. Adjust another marking knife 25 (marking knife 25 of the second marking assembly 9) to a suitable spatial position, slide the movable slot 21, and complete another gauge line at the position of (X+25) mm.

[0093] Example 2

[0094] The tensile specimen to be marked with gauge lines in the embodiment is a proportional circular cross-section machined tensile specimen, as shown in the attached Figure 8 As shown, the original diameter of the parallel length of the tensile specimen is 10 mm, the original gauge length is 50 mm, and the parallel length is 70 mm.

[0095] To scribing a tensile specimen using the apparatus of the present invention, the two supporting portions of the tensile specimen should first be placed on two corresponding sample holders with V-shaped grooves 17 on their surfaces, with the tensile specimens arranged in parallel. The relative positions of the two sample holders are adjusted according to the total length of the tensile specimen. After ensuring that the two sample holders secure the tensile specimen, the first fastening screws 20 on the sides of the two sample holders are tightened to maintain the position of the two sample holders and stabilize the tensile specimen. The remaining scribing process is the same as that described in Example 1.

[0096] Example 3

[0097] In this embodiment, the tensile specimen to be marked is an unprocessed tensile specimen with a regular hexagonal cross section, as shown in the attached Figure 9 As shown, the original gauge length is 100 mm.

[0098] Since the parallel section of this type of tensile specimen is long, if the tensile specimen is marked in the manner of Example 1, the probability of the tensile specimen breaking outside the gauge line is high. Therefore, for this type of tensile specimen, the gauge lines are marked in a manner of overlapping gauge lines.

[0099] When using the device of the present invention to mark such tensile specimens, the tensile specimens should first be cut into the same length in the longitudinal direction, and then one side of the tensile specimen plane should be placed on a sample placement table with a straight-shaped table 18 or a V-shaped groove 17 on the surface, and the tensile specimens should be arranged in parallel in sequence.

[0100] Adjust the relative positions of the two test stands based on the total length of the tensile specimen. After ensuring that the two test stands are firmly supporting the specimen, tighten the first fastening screw 20 on the side of the test stand to maintain the stationary position and stabilize the specimen. Use a thick marker pen to mark along the longitudinal direction of the specimen, covering all areas where the gauge lines will be marked. Then, move the positioning cursor 13 on the scale base. Use the scale base markings to locate the center of the specimen. This marking is X mm. Move the positioning cursor 13 to the (X-25) mm mark and tighten the screws securing the positioning cursor 13. This locks the positioning cursor 13 in place. Adjust the vertical position of the marking knife 25 based on the height of the tensile specimen and tighten the fastening nut to secure the marking knife 25. Slide the sliding slot 21 to mark one gauge line at the (X-50) mm position. Move the positioning cursor 13 to the (X+50) mm mark and slide the sliding slot 21 to mark the next gauge line. Then, with the scale value (X-5) mm as the center position, draw another pair of scale lines at the positions (X-5-50) mm and (X-5+50) mm in the same way as above. With the scale value (X+5) mm as the center position, draw the third pair of scale lines at the positions (X+5-50) mm and (X+5+50) mm in the same way as above. Figure 10 The method of marking gauge lines with overlapping strokes can increase or decrease the number of gauge lines according to the distance between the parallel sections of the tensile specimen.

[0101] Example 4

[0102] In this embodiment, the tensile test specimen to be marked is a round tube segment tensile test specimen, such as Figure 11As shown, the original gauge length is 100 mm. To mark a tensile specimen using the apparatus of the present invention, first place the specimen on a sample-setting table with a V-shaped groove 17 on its surface, arranging the specimens in parallel. The remaining marking steps and methods refer to those in Example 3. The number of gauge lines should be determined based on the parallel length of the circular tube segment.

[0103] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A batch tensile specimen gauge marking device, characterized in that: It includes a supporting unit, a sample placement unit, a gauge length unit and a marking unit; The sample placement unit, the gauge unit and the marking unit are all arranged on the support unit; The sample placement unit is used to fix the tensile specimen; the sample placement unit includes a first sample placement platform and a second sample placement platform of the same structure, the first sample placement platform and the second sample placement platform are parallel to each other and are symmetrically arranged when placed; the first sample placement platform includes an integrally formed fixing portion and a supporting portion, the fixing portion is provided with a row of continuous V-shaped grooves and a row of discontinuous straight-shaped platforms, the continuous V-shaped grooves forming a serrated fixing structure, and the straight-shaped platform is arranged between two adjacent V-shaped support arms; The gauge unit is used to gauge the tensile specimen, and the gauge unit is arranged at a higher height in the vertical direction than the sample placement unit; the gauge unit includes a gauge block, a first scale seat and a second scale seat of identical structure and arranged parallel to each other; positioning cursors of identical structure are respectively provided at both ends of the gauge block, and the positioning cursors are provided with rectangular cavity slides, and the two rectangular cavity slides are correspondingly nested in the first scale seat and the second scale seat; a threaded hole is provided on the side of the positioning cursor away from the gauge block, and a positioning screw is provided in the threaded hole; the verticality, surface roughness, flatness and straightness of the two end surfaces of the positioning cursor perpendicular to the direction of the first scale seat and the second scale seat all meet the standard requirements of the ruler; The marking unit is used to mark the tensile specimen after the gauge length; the marking unit includes a first marking assembly and a second marking assembly with the same structure and composition, the first marking assembly includes a first sample table guide rail, a movable groove, a connecting rod, a compression spring, a slider, a marking knife and a marking knife fixed block; the first sample table guide rail is arranged perpendicular to the movable groove; the first sample table guide rail is arranged on the first sample table, and a first groove is provided at the bottom end of the movable groove, and the movable groove is nested on the first sample table guide rail through the first groove; a second slide groove is provided at the top of the movable groove, and the slider is embedded in the second slide groove, and the marking knife fixed block is provided on the top surface of the slider; a circular hole baffle is provided at one end of the second slide groove, the connecting rod includes a movable end and a fixed end, the connecting rod passes through the circular hole baffle, and the fixed end is fixedly connected to the marking knife fixed block, and the connecting rod The movable end is arranged outside the circular hole baffle, and the compression spring is sleeved on the connecting rod and is located between the circular hole baffle and the scoring knife fixing block; a threaded hole and a scoring knife fixing hole are provided on the scoring knife fixing block at an end away from the compression spring, and the scoring knife fixing hole is arranged in a vertical direction, and the threaded hole is connected with the scoring knife fixing hole and the two are perpendicular. When the scoring knife is inserted into the scoring knife fixing hole, the scoring knife is fixed by fixing the second fastening screw into the threaded hole; the scoring knife includes a knife head and a knife handle, and the knife handle is semi-cylindrical, including a semi-cylindrical surface and a rectangular surface, the semi-cylindrical surface is at the end away from the second fastening screw, and the rectangular surface is at the end close to the second fastening screw, and the root of the knife head away from the end of the knife handle is provided with two inclined surfaces, so that the root of the knife head forms a knife tip, and the knife tip and the rectangular surface of the knife handle are on the same plane.

2. The batch tensile specimen gauge marking device according to claim 1, characterized in that: The support unit includes a rectangular base; The first sample placement platform and the second sample placement platform are arranged in parallel along the length direction of the base, and the tensile specimen is fixed between the first sample placement platform and the second sample placement platform and is perpendicular to both.

3. The batch tensile specimen gauge marking device according to claim 2, characterized in that: The support unit further comprises a first base guide rail and a second base guide rail, wherein the first base guide rail and the second base guide rail are arranged in parallel along the width direction of the base; Both ends of the first sample placement platform and the second sample placement platform are slidably connected to the first base guide rail and the second base guide rail; the first sample placement platform and the second sample placement platform can slide toward or in opposite directions along the first base guide rail and the second base guide rail.

4. The batch tensile specimen gauge marking device according to claim 3, characterized in that: Both ends of the bottom of the first sample placement table and the second sample placement table are provided with guide rail grooves; the two ends of the bottom of the first sample placement table are respectively assembled with the first base guide rail and the second base guide rail through the guide rail grooves, and similarly, the two ends of the bottom of the second sample placement table are respectively assembled with the first base guide rail and the second base guide rail through the guide rail grooves.

5. The batch tensile specimen gauge marking device according to claim 4, characterized in that: The first scale seat and the second scale seat are respectively arranged at both ends of the base along the width direction of the base, and the gauge block is arranged between the first scale seat and the second scale seat along the length direction of the base. The gauge block is slidably connected to the first scale seat and the second scale seat.

6. The batch tensile specimen gauge marking device according to claim 1, characterized in that: The first marking assembly is arranged on the first sample placement table, and the second marking assembly is arranged on the second sample placement table; the first marking assembly and the second marking assembly are used to mark the gauge positions at both ends of the tensile specimen.

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