Workpiece stretching test device

Abstract

The utility model discloses a workpiece tensile test device, including: actuator main part and measuring piece, actuator main part includes frame, reference seat and first drive piece, reference seat and first drive piece are installed on frame respectively, reference seat is connected with first fixed seat, first drive piece is connected with second fixed seat, and the second fixed seat is connected with the first fixed seat. The first driving part is used for driving the second fixing seat to move towards or back to the first fixing seat; the measuring piece comprises a scale, a first calibration strip and a second calibration strip, the scale is installed on the same side of the first fixing base and the second fixing base, the first calibration strip is connected to the side, facing the scale, of the first fixing base and extends towards the scale, and the second calibration strip is connected to the side, facing the scale, of the second fixing base and extends towards the scale. By arranging the first calibration strip, the second calibration strip and the ruler, the stretching degree of the workpiece is accurately measured, meanwhile, a user can directly observe the stretching characteristic of the workpiece in the repeated stretching process conveniently, and the using intuition of the testing device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of detection, and particularly relates to a workpiece tensile testing device. Background Art

[0002] When existing automobile manufacturers conduct tensile tests on chassis structural parts, a hydraulic actuator is mainly used to stretch the workpiece, so as to test the fatigue strength and tensile change characteristics of the workpiece. At present, the hydraulic actuators on the market fix the workpiece through fixtures. When installing the test material for actual testing, it is necessary to first fix the fixture and the hydraulic rod, and then place the workpiece to be tested on the fixture. Due to reasons such as improper fixing and installation of the workpiece or fixture and different operator levels, problems such as improper installation and repeated height adjustment often occur, which not only consumes debugging time, but also makes it difficult to directly observe the tensile change characteristics of the test object during the repeated stretching process of the workpiece. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a workpiece tensile testing device, which is convenient for users to directly observe the tensile characteristics of the workpiece, reduces errors in the test and installation processes, and improves the test accuracy.

[0004] A workpiece tensile testing device according to an embodiment of the utility model includes: an actuator main body and a measuring member. The actuator main body includes a frame, a reference seat, and a first driving member. The reference seat and the first driving member are respectively installed on the frame. The reference seat is connected with a first fixing seat, and the output end of the first driving member is connected with a second fixing seat. The first fixing seat and the second fixing seat are arranged opposite to each other, and the first fixing seat and the second fixing seat cooperate to fix both ends of the workpiece. The first driving member is used to drive the second fixing seat to move towards or away from the first fixing seat. The measuring member includes a scale, a first calibration strip, and a second calibration strip. The scale is installed between the reference seat and the first driving member and on the same side of the first fixing seat and the second fixing seat. The first calibration strip is connected to the side of the first fixing seat facing the scale and extends towards the scale. The second calibration strip is connected to the side of the second fixing seat facing the scale and extends towards the scale.

[0005] A workpiece tensile testing device according to an embodiment of the utility model has at least the following beneficial effects: By setting the first calibration strip, the second calibration strip, and the scale, the second calibration strip moves synchronously with the second fixing seat and moves relative to the first calibration strip. During the repeated tensile test of the workpiece, taking the scale position corresponding to the first calibration strip as the positioning reference, by observing the scale position corresponding to the second fixing seat, while accurately measuring the tensile degree of the workpiece, it is convenient for users to directly observe the tensile characteristics of the workpiece during repeated stretching, improving the intuitiveness of the use of the testing device.

[0006] According to some embodiments of the present utility model, the reference base includes a second driving member, an output end of the second driving member is connected with a reference block, the first fixing base is installed on the reference block, and the second driving member is configured to drive the first fixing base to move towards or away from the second fixing base.

[0007] According to some embodiments of the present utility model, the reference base further includes a spirit level, and the spirit level is installed on an outer wall of the reference block.

[0008] According to some embodiments of the present utility model, a positioning groove is provided on the outer wall of the reference block, and at least a part of the spirit level is received in the positioning groove and is bolted to the reference block.

[0009] According to some embodiments of the present utility model, the measuring member further includes a first distance sensor and a second distance sensor. The first distance sensor is connected with the first fixing base, the second distance sensor is connected with the second fixing base, and the first distance sensor and the second distance sensor are oppositely arranged.

[0010] According to some embodiments of the present utility model, the first calibration strip is provided with a first guide hole matching the scale, the second calibration strip is provided with a second guide hole matching the scale, and the scale respectively passes through the first guide hole and the second guide hole.

[0011] According to some embodiments of the present utility model, the first calibration strip is provided with a first connecting portion, the first fixing base is provided with a second connecting portion, and the first calibration strip is detachably connected with the first fixing base through the cooperation of the first connecting portion and the second connecting portion.

[0012] According to some embodiments of the present utility model, the first connecting portion includes an insertion block and a dialing block. The first calibration strip is provided with a third guide hole and a through hole. The third guide hole is located on a side of the first calibration strip facing the first fixing base. The through hole penetrates through an outer wall of the first calibration strip and is communicated with the third guide hole. The insertion block is slidably installed in the third guide hole along a horizontal direction. The dialing block is provided with a connecting section. The connecting section passes through the through hole and is connected with the insertion block. The second connecting portion is a jack, and the insertion block is inserted and matched with the jack.

[0013] According to some embodiments of the present utility model, a spring is arranged in the third guide hole, and two ends of the spring respectively abut against an inner wall of the first calibration strip and the insertion block.

[0014] According to some embodiments of the present utility model, the first fixing base is provided with a first installation groove, and the first fixing base is connected with a locking member, and the locking member is adapted to lock or loosen a workpiece inserted into the first installation groove. Description of the Drawings

[0015] Figure 1 is a perspective view of a workpiece stretching test device according to an embodiment of the present utility model;

[0016] Figure 2 is a schematic structural diagram of a frame according to an embodiment of the present utility model;

[0017] Figure 3 is Figure 1 an enlarged view of part A in

[0018] Figure 4 is a schematic connection diagram of a first calibration bar and a first fixing base according to an embodiment of the present utility model;

[0019] Figure 5 is an exploded schematic view of a first calibration bar according to an embodiment of the present utility model.

[0020] Reference numerals: actuator body 100; frame 110; accommodation groove 111; guide rod 112; reference base 120; first fixing base 121; first installation groove 1211; screw 1212; second driving member 122; reference block 123; first guide block 1231; positioning groove 1232; spirit level 124; first driving member 130; second fixing base 131; stretching block 132; second guide block 1321; measuring member 200; scale 210; first calibration bar 220; first guide hole 221; first connecting portion 222; insertion block 2221; dialing block 2222; connecting section 2223; third guide hole 223; through hole 224; spring 225; second calibration bar 230; first distance sensor 240; second distance sensor 250. Detailed Description of the Embodiment

[0021] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0022] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood not to include the present number, and above, below, within, etc. are understood to include the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0023] In the description of the present utility model, unless otherwise clearly defined, terms such as "setting", "installation", and "connection" should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0024] Referring Figure 1 As shown, a workpiece stretching test device according to an embodiment of the present utility model includes an actuator main body 100 and a measuring member 200.

[0025] The actuator main body 100 includes a frame 110, a reference seat 120, and a first driving member 130. The frame 110 is a long strip-shaped bracket, and there are two frames 110 which are arranged opposite to each other. The reference seat 120 and the first driving member 130 are both installed between the two frames 110 and are respectively located at both ends of the frame 110. The reference seat 120 includes a second driving member 122, the output end of the second driving member 122 is connected with a reference block 123, the reference block 123 is connected with a first fixing seat 121 through a fastener, the output end of the first driving member 130 is provided with a stretching block 132, the stretching block 132 is connected with a second fixing seat 131 through a fastener, the first fixing seat 121 and the second fixing seat 131 are arranged opposite to each other, the first driving member 130 is used to drive the second fixing seat 131 to move towards or away from the first fixing seat 121, and the second driving member 122 is used to drive the first fixing seat 121 to move towards or away from the second fixing seat 131. The first fixing seat 121 and the second fixing seat 131 cooperate to fix both ends of the workpiece.

[0026] It should be noted that the workpieces detected by the test device are usually the telescopic characteristics of various telescopic structural parts on the vehicle chassis, such as engine connecting rods, shock absorbers, etc. In addition, it can also be applicable to detecting the telescopic characteristics of various metal or non-metal workpieces.

[0027] It should also be noted that the second driving member 122 is a hydraulic cylinder, and the first driving member 130 is a hydraulic actuator. The test device drives the first fixing seat 121 and the second fixing seat 131 to move through a hydraulic system, with a simple structure, convenient control, and capable of providing a large tensile force to stretch workpieces with high strength, which can effectively simplify the structure of the test device and facilitate the user's control and use.

[0028] By setting the second driving member 122, before the user installs the workpiece, the user can adjust the height of the reference block 123 according to the length of the workpiece to be tested, quickly adjust the distance between the first fixing seat 121 and the second fixing seat 131, so as to adapt to the length dimension of the workpiece to be tested, save the debugging time of the test device, and subsequent detection can be carried out with the lifting position of the reference block 123 as the positioning reference, improving the installation convenience of the workpiece and ensuring the installation accuracy of the workpiece.

[0029] In addition, receiving grooves 111 are symmetrically arranged on the opposite sides of the two racks 110. The racks 110 are connected with two detachable guide rods 112 through latches. The guide rods 112 are correspondingly received in the receiving grooves 111. First guide blocks 1231 are symmetrically arranged on both sides of the reference block 123, and second guide blocks 1321 are symmetrically arranged on both sides of the stretching block 132. The first guide blocks 1231 and the second guide blocks 1321 are respectively slidably connected with the guide rods 112.

[0030] By arranging the first guide blocks 1231, the second guide blocks 1321 and the guide rods 112, the guide rods 112 guide the first guide blocks 1231 and the second guide blocks 1321 to move, and further guide the reference block 123 and the stretching block 132 to move linearly along the guide rods 112, effectively improving the moving stability of the reference block 123 and the stretching block 132.

[0031] Refer to Figure 1 and Figure 3 As shown, it can be understood that the first fixing seat 121 is provided with a first installation groove 1211, which matches the end of the workpiece to be measured. The first fixing seat 121 is connected with a locking member. The locking member can be a screw 1212 that passes through the outer wall of the first fixing seat 121 and the end extends into the first installation groove 1211. Rotating the screw 1212 can lock or loosen the workpiece inserted into the first installation groove 1211. The second fixing seat 131 is provided with a second installation groove, which is arranged opposite to the first installation groove 1211. The locking structure of the second fixing seat 131 can refer to the description of the locking member above and will not be elaborated here.

[0032] By arranging the first installation groove 1211 and the screw 1212, on the one hand, the locking structure of the first fixing seat 121 can be simplified. After the two ends of the workpiece to be measured are respectively inserted into the first installation groove 1211 and enter the second installation groove, rotating the screw 1212 can lock or loosen the workpiece inserted into the first installation groove 1211, simplifying the installation steps of the workpiece to be measured and improving the use convenience of the detection device; on the other hand, after the user rotates the screw 1212 to lock the workpiece, the user can continue to rotate the screw 1212 to adjust the locking force of the locking member to adapt to workpieces with different installation requirements.

[0033] After the detection device works continuously on the workshop or the special detection line for a period of time, due to the vibration generated during the detection process itself, or the vibration of other devices in the same workshop or on the same detection line, etc., the plane where the detection device is located will produce a certain degree of deformation, resulting in the deviation of the detection device in the vertical plane, which not only affects the installation of the workpiece but also affects the accuracy of the subsequent detection results.

[0034] Refer to Figure 1As shown, it can be understood that the reference base 120 also includes a spirit level 124. The spirit level 124 is a measuring instrument that uses the principle of liquid level to directly display angular displacement with a spirit level bubble to measure the degree of deviation of the measured surface relative to the horizontal position, plumb position, and tilt position. The spirit level 124 is installed on the outer wall of the reference block 123.

[0035] By providing the level 124 , the user can check the deflection of the detection device from time to time, thereby facilitating the user to adjust the detection device in a timely manner, reducing errors during testing and installation, and improving test accuracy and equipment service life.

[0036] Reference Figure 3 As shown, it can be understood that the outer wall of the reference block 123 is provided with a positioning groove 1232, the positioning groove 1232 and the level 124 match, the level 124 is at least partially accommodated in the positioning groove 1232 and is bolted to the reference block 123.

[0037] By providing the positioning groove 1232, the positioning installation of the level 124 can be facilitated, helping the user to quickly assemble, repair or replace the level 124. At the same time, it can play a certain protective role on the level 124 and extend the service life of the level 124.

[0038] Reference Figure 1 As shown, it can be understood that the measuring part 200 includes a scale 210, a first calibration bar 220 and a second calibration bar 230. The scale 210 is installed between the reference seat 120 and the first driving member 130 and is located on the same side of the first fixed seat 121 and the second fixed seat 131. Specifically, the scale 210 is in the shape of a long strip. The two ends of the scale 210 are respectively arranged on the first driving member 130 and the second driving member 122, and are fastened with back-to-back right-angle irons and bolts. The other end of the right-angle iron is fixed to the first driving member 130 and the second driving member 122 by bolts. At the same time, the scale 210 penetrates the reference block 123 and the stretching block 132 to ensure that the scale 210 is stably installed and not affected by deformation.

[0039] The first calibration bar 220 is connected to the side of the first fixing base 121 facing the scale 210 and extends toward the scale 210. The second calibration bar 230 is connected to the side of the second fixing base 131 facing the scale 210 and extends toward the scale 210. That is, the first calibration bar 220 and the second calibration bar 230 are arranged opposite each other on the same side of the scale 210. The measuring member 200 further includes a first distance sensor 240 and a second distance sensor 250. The first distance sensor 240 is connected to the first fixing base 121, and the second distance sensor 250 is connected to the second fixing base 131. The first distance sensor 240 and the second distance sensor 250 are arranged opposite each other. Specifically, the first distance sensor 240 and the second distance sensor 250 are respectively the receiving end and the transmitting end of the distance measurement signal such as electromagnetic waves, infrared rays, or laser lights. The first distance sensor 240 and the second distance sensor 250 are respectively mounted on opposite sides of the first calibration bar 220 and the second calibration bar 230 via gaskets and fasteners.

[0040] By setting up the first distance sensor 240 and the second distance sensor 250, and the first distance sensor 240 and the second distance sensor 250 are communicatively connected with the external controller, the length change of the workpiece during repeated tensile testing can be collected and counted, which is convenient for the user to perform subsequent data statistical calculations and tensile characteristics analysis, and effectively improves the intelligence level of the detection device.

[0041] Reference Figure 3 and Figure 4 As shown, it can be understood that the first calibration strip 220 is provided with a first connecting portion 222, and the first fixing seat 121 is provided with a second connecting portion. The first calibration strip 220 is detachably connected to the first fixing seat 121 through the cooperation of the first connecting portion 222 and the second connecting portion. The connecting portion and the second connecting portion can be a mutually cooperating snap-fit structure, a plug-in structure, or a magnetic structure, etc., which will not be repeated here. The second calibration strip 230 and the second fixing seat 131 are also detachably connected through a structure similar to the first connecting portion 222 and the second connecting portion.

[0042] By setting the first connecting part 222 and the second connecting part, it is convenient for the user to install or remove the first calibration strip 220. The user can remove the first calibration strip 220 when the reference block 123 is raised or lowered to adapt to the installation of the workpiece to be measured, so as to avoid the first calibration strip 220 affecting the adjustment position of the first fixing seat 121. After the first fixing seat 121 is positioned, the user can install the first calibration strip 220 on the side of the first fixing seat 121 facing the scale 210, so that the scale 210 reading corresponding to the first calibration strip 220 is used as the detection reference to ensure the accuracy of subsequent detection results.

[0043] Continue to refer to Figure 1 and Figure 4As shown, it can be understood that the first calibration strip 220 is provided with a first guide hole 221 matching the scale 210, and the second calibration strip 230 is provided with a second guide hole matching the scale 210, and the scale 210 is respectively passed through the first guide hole 221 and the second guide hole. In other words, the first calibration strip 220 is slidably connected to the scale 210 through the first guide hole 221, and the second calibration strip 230 is slidably connected to the scale 210 through the second guide hole.

[0044] By setting the first guide hole 221 and the second guide hole, the scale 210 can act as a guide rail to guide the first calibration bar 220 and the second calibration bar 230 to move along the scale 210, ensuring that during the movement of the first driving member 130 or the second driving member 122, the first distance sensor 240 on the first calibration bar 220 and the second distance sensor 250 on the second calibration bar 230 move relatively synchronously, avoiding severe vibrations that may cause deviations in the test results, and further improving the accuracy of the test results.

[0045] Reference Figure 4 and Figure 5 As shown, it can be understood that the first connecting portion 222 includes an insert block 2221 and a shift block 2222, the first calibration bar 220 is provided with a third guide hole 223 and a through hole 224, the third guide hole 223 is located on the side of the first calibration bar 220 facing the first fixed seat 121, the through hole 224 passes through the outer wall of the first calibration bar 220 and is connected to the third guide hole 223, the insert block 2221 is slidably installed in the third guide hole 223 along the horizontal direction, the shift block 2222 is provided with a connecting section 2223, the connecting section 2223 is passed through the through hole 224 and connected to the insert block 2221, the second connecting portion is a socket, and the insert block 2221 is plugged into the socket. The connection structure between the second fixed seat 131 and the second calibration bar 230 can refer to the previous description of the insert block 2221 and the shift block 2222, which will not be repeated here.

[0046] By setting the shift block 2222 and the insert block 2221, the user shifts the shift block 2222 on the outer wall of the first fixed seat 121, and the insert block 2221 can be driven to move toward or back to the socket through the connecting section 2223 to achieve the installation or disassembly of the first calibration bar 220. The shift block 2222 and the insert block 2221 have a simple structure and are easy to operate, which can effectively simplify the connection structure between the first calibration bar 220 and the first fixed seat 121, and improve the assembly convenience of the first calibration bar 220.

[0047] Reference Figure 5 As shown, it can be understood that a spring 225 is provided in the third guide hole 223, and the two ends of the spring 225 are respectively in contact with the inner wall of the first calibration strip 220 and the plug 2221, and the spring 225 can drive the plug 2221 to move toward the socket.

[0048] By setting the spring 225, after the user toggles the toggle block 2222 to retract the insertion block 2221 into the third guide hole 223, the user aligns the first calibration strip 220 with the jack and then releases the hand. Under the action of the spring 225, the insertion block 2221 can automatically insert into the jack, realizing the installation of the first calibration strip 220, and providing a pressing force for the insertion block 2221 during subsequent tensile tests, avoiding loosening of the insertion block 2221 and affecting the positioning installation of the first calibration strip 220, and further improving the assembly convenience and installation stability of the first calibration strip 220.

[0049] It can be understood that by setting the first driving member 130, the second driving member 122, and the scale 210, the user can quickly adjust the distance between the first fixed seat 121 and the second fixed seat 131 according to the length of the workpiece to be tested, so as to adapt to the length dimension of the workpiece to be tested and continuously repeat the tensile test, saving the debugging time of the test device, avoiding problems such as improper installation and repeated height adjustment, improving the installation convenience of the workpiece and ensuring the installation accuracy of the workpiece. By setting the first calibration strip 220 and the second calibration strip 230, since the second calibration strip 230 moves synchronously with the second fixed seat 131 and moves relative to the first calibration strip 220, and the first calibration strip 2 serves as a reference for the position of the scale 210 corresponding to the side end face facing the second calibration strip 230, and by observing the position of the scale 210 corresponding to the side end face of the second fixed seat 131 facing the first calibration strip 220, while accurately measuring the tensile degree of the workpiece, it is convenient for the user to directly observe the tensile characteristics of the workpiece during repeated tensile tests, improving the intuitiveness of the use of the test device.

[0050] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge scope of those of ordinary skill in the art.

Claims

1. A workpiece tensile testing device, characterized in that, Comprising: An actuator body, including a frame, a reference base, and a first driving member. The reference base and the first driving member are respectively installed on the frame. The reference base is connected to a first fixing base, and the output end of the first driving member is connected to a second fixing base. The first fixing base and the second fixing base are arranged opposite to each other, and the first fixing base and the second fixing base cooperate to fix both ends of the workpiece. The first driving member is used to drive the second fixing base to move towards or away from the first fixing base; A measuring member, including a scale, a first calibration strip, and a second calibration strip. The scale is installed between the reference base and the first driving member and on the same side of the first fixing base and the second fixing base. The first calibration strip is connected to the side of the first fixing base facing the scale and extends towards the scale. The second calibration strip is connected to the side of the second fixing base facing the scale and extends towards the scale.

2. The workpiece stretching test device according to claim 1, characterized in that, The reference base includes a second driving member, and the output end of the second driving member is connected to a reference block. The first fixing base is installed on the reference block, and the second driving member is used to drive the first fixing base to move towards or away from the second fixing base.

3. The workpiece tensile testing device according to claim 2, characterized in that, The reference base further includes a spirit level, and the spirit level is installed on the outer wall of the reference block.

4. An apparatus for tensile testing of a workpiece according to claim 3, characterized in that, A positioning groove is provided on the outer wall of the reference block, and at least a part of the spirit level is received in the positioning groove and is bolted to the reference block.

5. A workpiece tensile test device according to claim 1 or 2, characterized in that, The measuring member further includes a first distance sensor and a second distance sensor. The first distance sensor is connected to the first fixing base, and the second distance sensor is connected to the second fixing base. The first distance sensor and the second distance sensor are arranged opposite to each other.

6. The workpiece tensile testing device according to claim 1, characterized in that, The first calibration strip is provided with a first guiding hole matching the scale, and the second calibration strip is provided with a second guiding hole matching the scale. The scale respectively passes through the first guiding hole and the second guiding hole.

7. A workpiece tensile testing device according to claim 1 or 6, characterized in that, The first calibration strip is provided with a first connecting portion, and the first fixing base is provided with a second connecting portion. The first calibration strip is detachably connected to the first fixing base through the cooperation of the first connecting portion and the second connecting portion.

8. An apparatus for tensile testing of workpieces according to claim 7, characterized in that, The first connecting portion includes an insertion block and a dialing block. The first calibration strip is provided with a third guiding hole and a through hole. The third guiding hole is located on the side of the first calibration strip facing the first fixing base. The through hole penetrates the outer wall of the first calibration strip and communicates with the third guiding hole. The insertion block is slidably installed in the third guiding hole in the horizontal direction. The dialing block is provided with a connecting section, and the connecting section passes through the through hole and is connected to the insertion block. The second connecting portion is a jack, and the insertion block is inserted and matched with the jack.

9. An article tensile testing device according to claim 8, characterized in that, A spring is provided in the third guiding hole, and both ends of the spring respectively abut against the inner wall of the first calibration strip and the insertion block.

10. The workpiece stretching test device according to claim 1, characterized in that, The first fixing base is provided with a first installation groove, and the first fixing base is connected with a locking member. The locking member is adapted to lock or loosen the workpiece inserted into the first installation groove.

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