Sample positioning device for Charpy impact test
By designing a sample positioning device for the Charpy impact test, and utilizing a motor- and cylinder-driven pushing and clamping mechanism, rapid and accurate sample positioning was achieved, solving the problems of rapid sample loading and positioning errors in the Charpy impact test, and ensuring the accuracy of the test data.
Patent Information
- Application Number
- CN202422947474.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-11-29
AI Technical Summary
Existing Charpy impact testing equipment has errors in rapid sample loading and positioning, which affects the accuracy of test data, especially under high or low temperature conditions.
A sample positioning device was designed, which includes an impact anvil, a pushing device, and a clamping device. The sample is pushed to the designated position by a screw driven by a motor, the V-shaped notch of the sample is accurately positioned by a slide bar and a positioning pointer, and the sample is clamped by a movable positioning block driven by a cylinder to ensure that the sample does not deviate during the impact.
It enables rapid and accurate positioning of the specimen, reduces test errors, ensures the accuracy of test data, and is suitable for Charpy impact tests under room temperature, high temperature and low temperature conditions.
Smart Images
Figure CN223637231U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to positioning device technical field, specifically disclose the sample positioning device of charpy impact test. BACKGROUND
[0002] In addition to having sufficient strength and plasticity, metal materials also need to have sufficient toughness, and good toughness metal materials do not suddenly break in a brittle manner during use, ensuring the safety of the material. However, in actual production, most metal materials are not regular cubes with uniform cross sections, and often have sharp changes in cross section, which can be considered as "notches" in the metal material. After the metal material has a notch, stress and strain will concentrate at the notch, reducing the impact resistance of the metal material and affecting the mechanical properties of the metal material.
[0003] Charpy impact testing is a dynamic test method for determining the toughness of metal materials. By applying an impact load to the test sample, the test sample deforms and breaks, and the notch in the test sample can well reflect the impact absorption capacity of the test sample. Although the impact absorption measured by charpy impact testing does not have a clear physical meaning and cannot be used as a basis for characterizing the toughness of metal materials, charpy impact testing has the advantages of easy sample processing, short test time, and test data sensitive to sample materials. Through charpy impact testing, the amount of energy absorbed during the deformation and fracture of the material under impact load can be determined, and the notch sensitivity, hot working quality, strain aging sensitivity, and high and low temperature brittle-ductile transition of the metal material can be evaluated.
[0004] The standard charpy impact test sample has a length of 55mm, a cross section of 10mm x 10mm, and a 2mm deep V-shaped or U-shaped notch in the middle. When performing a normal temperature charpy impact test at a specified temperature, the cut-out test metal sample needs to be fixed in a simply supported beam state, and then a pendulum at a specified height is used to strike the back of the sample notch. When measuring the toughness of the test sample at high or low temperature, the test sample is taken out from the heat preservation environment, and is affected by the temperature difference and the sample loading time. If the sample cannot be quickly loaded for measurement, errors will occur in the measurement results, affecting the accuracy of the test data.
[0005] Charpy impact testing can determine the energy absorbed during the deformation and fracture of the test sample, and a large absorbed work value indicates that the metal material has good toughness and is not sensitive to notches or other stress concentration points in the material structure. Therefore, charpy impact testing is a dynamic test, and the size of the test sample, the angle of the pendulum, the position of the pendulum strike, and whether the test sample is tightly fixed can all cause errors in the charpy impact test results. Therefore, a sample positioning device suitable for charpy impact testing needs to be developed, which can quickly load the sample and accurately position the sample to reduce errors. SUMMARY
[0006] The utility model discloses a sample positioning device of charpy impact test, solves the problem of the prior art device.
[0007] In order to solve the above technical problem, the utility model provides the following technical scheme:
[0008] The utility model discloses a sample positioning device of charpy impact test, which comprises an impact anvil, an impact groove is arranged in the middle of the impact anvil, a pendulum swings and impacts a sample to be tested in the impact groove, a transverse fixed positioning block and a longitudinal positioning block are arranged on one side of the impact groove, the transverse fixed positioning block is in close contact with the longitudinal positioning block, a transverse positioning baffle is arranged on the other side of the impact groove, the transverse fixed positioning block, the transverse positioning baffle and the longitudinal positioning block form a sample positioning groove, the sample to be tested is pushed into the sample positioning groove by a pushing device, and the sample to be tested is vertically placed in the impact groove.
[0009] The pushing device comprises a sample push plate, a screw rod, a screw rod sleeve and a motor, the output end of the motor is connected with the screw rod, the other end of the screw rod is connected with the sample push plate, and the screw rod drives the sample push plate to move along the direction of the screw rod sleeve and pushes the sample to be tested to reach the sample positioning groove under the action of the motor.
[0010] The longitudinal positioning block and the transverse fixed positioning block are vertically arranged, the transverse fixed positioning block and the transverse positioning baffle are located on the same horizontal line and have the same height, the longitudinal positioning block is higher than the transverse fixed positioning block, a sliding groove is arranged on the side close to the sample of the transverse positioning baffle, a sliding rod is arranged in the sliding groove, one end of the sliding rod is movably connected with the sliding groove, and the side corresponding to the transverse fixed positioning block is provided with a sliding rod interface, and the other end is connected with the sliding rod interface when the sliding rod extends out of the sliding groove.
[0011] The positioning device further comprises a clamping device, and the clamping device is arranged on both sides of the impact groove, wherein the clamping device comprises a movable positioning block, an air pressure push rod, an air pressure sleeve and an air cylinder, the output end of the air cylinder is connected with the air pressure push rod, and the other end of the air pressure push rod is connected with the movable positioning block, the air pressure sleeve is sleeved on the air pressure push rod, the air cylinder pushes the movable positioning block to move longitudinally on the impact anvil when the sample to be tested is located in the sample positioning groove, and the sample to be tested is compressed, the material of the movable positioning block is polyvinyl chloride resin, and anti-skid lines are arranged on the side of the movable positioning block in contact with the sample to be tested.
[0012] The positioning device further comprises a support and a limiting baffle, the pushing device and the transverse positioning baffle are fixed on the support, the limiting baffle is fixed on the impact anvil, the limiting baffle is located between the pushing device and the clamping device, the limiting baffle can prevent the sample push plate from continuously pushing the sample to be tested after the sample to be tested reaches the specified position, and the sample to be tested is prevented from being deformed due to extrusion.
[0013] The impact groove is a V-shaped groove, both sides are high, the middle is low, a positioning pointer is movably connected to the bottom end of the impact groove, and when the to-be-tested sample is positioned, the positioning pointer can be pulled from the bottom end of the impact groove to the middle of the V-shaped notch of the to-be-tested sample, so that the notch of the to-be-tested sample is positioned.
[0014] The impact anvil is fastened on the charpy impact testing machine by screws, the positioning device is prevented from shaking under the impact of the pendulum hammer, and the accuracy of test data is affected.
[0015] Compared with the prior art, the impact anvil is fastened on the charpy impact testing machine by screws, the positioning device is prevented from shaking under the impact of the pendulum hammer, and the accuracy of test data is affected.
[0016] In the utility model, the motor drives the screw rod, and the to-be-tested sample is pushed to the designated test position, the slide rod is connected to the two sides of the impact anvil during the movement of the sample, the sample is prevented from deviating and slipping during the movement, test errors are caused, the positioning pointer is pulled to position the middle of the V-shaped notch of the to-be-tested sample, after the position of the to-be-tested sample is ensured to be good, the movable positioning block is moved to reduce the sample positioning groove, the to-be-tested sample is fixed in the sample positioning groove, and the to-be-tested sample is accurately impacted on the back of the notch by the pendulum hammer, so that the accuracy of test data is ensured.
[0017] The sample positioning device for the charpy impact test is convenient to use, can quickly complete clamping and positioning of the to-be-tested sample, is suitable for charpy impact test of materials under room temperature, high temperature and low temperature conditions, and is simple to operate, and facilitates the impact test. BRIEF DESCRIPTION OF DRAWINGS
[0018] Fig. 1 It is a top view of the sample positioning device for the charpy impact test of the utility model when the sample is loaded;
[0019] Fig. 2 It is a top view of the sample positioning device for the charpy impact test of the utility model when the sample is not loaded;
[0020] Fig. 3 It is a front view of the sample positioning device for the charpy impact test of the utility model;
[0021] Fig. 4 It is a sectional view of the sample positioning device for the charpy impact test of the utility model when the sample is loaded.
[0022] In the drawing: 1, impact anvil; 2, screw; 3, impact groove; 4, positioning pointer; 5, slide rod interface; 6, transverse fixed positioning block; 7, transverse positioning baffle; 8, longitudinal positioning block; 9, movable positioning block; 10, air pressure push rod; 11, air pressure sleeve; 12, air cylinder; 13, support; 14, limiting baffle; 15, sample push plate; 16, screw rod; 17, screw rod sleeve; 18, motor; 19, slide rod; 20, sliding groove. DETAILED DESCRIPTION
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] In this embodiment, motor 18 is a Y80M2-2 type motor and cylinder 12 is a CJ182-10SU4 type cylinder.
[0025] like Figs. 1-4 As shown, the sample positioning device for the Charpy impact test includes an impact anvil 1, with an impact groove 3 in the middle of the impact anvil 1. The pendulum can swing in the impact groove 3 to impact the sample to be tested. A transverse fixing positioning block 6 and a longitudinal positioning block 8 are provided on the left side of the impact groove 3. The transverse fixing positioning block 6 is in close contact with the longitudinal positioning block 8. A transverse positioning baffle 7 is provided on the right side of the impact groove. The transverse fixing positioning block 6, the transverse positioning baffle 7, and the longitudinal positioning block 8 form the sample positioning groove. The sample to be tested is pushed into the sample positioning groove by a pushing device and placed perpendicular to the impact groove 3.
[0026] The impact anvil 1 is fastened to the Charpy impact testing machine by screws 2 to prevent the positioning device from shaking due to the impact force of the pendulum, which would affect the accuracy of the test data.
[0027] The impact groove 3 is a V-shaped groove, high on both sides and low in the middle. A positioning pointer 4 is hinged to the bottom of the impact groove 3. When positioning the test sample, the positioning pointer 4 can be pulled from the bottom of the impact groove 3 to the middle of the V-shaped notch of the test sample, thereby realizing the positioning of the V-shaped notch of the test sample and ensuring that the pendulum can correctly impact the back of the notch of the test sample without deviation.
[0028] The pushing device includes a sample pusher plate 15, a screw 16, a screw sleeve 17, and a motor 18. The output end of the motor 18 is connected to the screw 16, and the other end of the screw 16 is connected to the sample pusher plate 15. Under the action of the motor 18, the screw 16 drives the sample pusher plate 15 to move along the direction of the screw sleeve 17 and pushes the sample to be tested to the sample positioning groove.
[0029] The longitudinal positioning block 8 is vertically arranged with the transverse fixed positioning block 6, the transverse fixed positioning block 6 is on the same horizontal line with the transverse positioning baffle 7, and the height is the same, the longitudinal positioning block 8 is higher than the transverse fixed positioning block 6, the transverse positioning baffle 7 is provided with a sliding groove 20 close to the side of the sample, the sliding groove 20 is provided with a sliding rod 19, one end of the sliding rod 19 is hinged with the sliding groove 20, the sliding rod interface 5 is arranged on the side of the transverse fixed positioning block 6 opposite to the sliding groove 20, the sliding rod 19 is stretched out from the sliding groove 20 and connected with the sliding rod interface 5 before the sample is placed, after the sample positioning is completed, the sliding rod 19 is retracted into the sliding groove 20.
[0030] The positioning device further comprises a support 13 and a limiting baffle 14, the pushing device and the transverse positioning baffle are fixed on the support 13, the limiting baffle 14 is fixed on the impact anvil 1, the limiting baffle 14 is located between the sample pushing plate 15 and the clamping device, and the limiting baffle 14 can prevent the sample pushing plate from continuously pushing the sample to be tested after the sample to be tested reaches the specified position, so that the sample to be tested is prevented from being extruded to deform.
[0031] The positioning device further comprises a clamping device, the clamping device is arranged on both sides of the impact groove 3, the clamping device comprises a movable positioning block 9, a pneumatic push rod 10, a pneumatic sleeve 11 and a pneumatic cylinder 12, the output end of the pneumatic cylinder 12 is connected with the pneumatic push rod 10, the movable positioning block 9 is connected with the other end of the pneumatic push rod 11, the pneumatic sleeve 11 is sleeved on the pneumatic push rod 10, when the sample to be tested is located in the sample positioning groove, the pneumatic cylinder 12 pushes the movable positioning block 9 to move longitudinally on the impact anvil 1, so as to compress the sample to be tested, and the positioning of the sample to be tested is completed.
[0032] The material of the movable positioning block 9 is polyvinyl chloride resin, and the side of the movable positioning block 9 in contact with the sample to be tested is provided with anti-skid lines.
[0033] When the positioning device is used, the sliding rod 19 is pulled to connect the left side of the sliding rod 19 with the sliding rod interface 5 on the transverse fixed positioning block 6, the side of the sample to be tested with a notch is vertically above, the right side of the sample to be tested is attached to the sample pushing plate 15, the bottom of the sample to be tested is attached to the right fixed positioning block 7, the motor 18 is started, the output end of the motor 18 drives the screw rod 16, the screw rod 16 slides in the screw rod sleeve 17, the sample pushing plate 15 is pushed by the screw rod 16 to displace the sample to be tested along the sliding rod 19 to the sample positioning groove, at this time, the sample pushing plate 15 contacts the limiting baffle 14, the motor stops outputting, the screw rod 16 stops moving, the positioning pointer 4 in the impact groove 3 is pulled to make the positioning pointer 4 contact the center of the V-shaped notch of the sample to be tested, the notch of the sample is positioned, after the positioning is completed, the pneumatic push rod 10 pushes the movable positioning block 9 to move to the sample to be tested under the action of the pneumatic cylinder 12, the sample is clamped, the positioning pointer 4 returns to the original position, the sliding rod 19 is pulled into the sliding groove 20, and the positioning of the sample to be tested is completed.
[0034] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.
Claims
1. A specimen positioning device for a Charpy impact test, characterized in that: The sample positioning device comprises an impact anvil (1), the impact anvil (1) is provided with an impact groove (3) in the middle, a pendulum swings and impacts a sample to be tested in the impact groove (3), one side of the impact groove (3) is provided with a transverse fixed positioning block (6) and a longitudinal positioning block (8), the other side of the impact groove (3) is provided with a transverse positioning baffle (7), the transverse fixed positioning block (6), the transverse positioning baffle (7) and the longitudinal positioning block (8) form a sample positioning groove, the sample to be tested is pushed into the sample positioning groove by a pushing device, and at this time, the sample to be tested is vertically placed in the impact groove (3).
2. A specimen positioning device for a Charpy impact test according to claim 1, characterized in that: The pushing device comprises a sample push plate (15), a screw rod (16), a screw rod sleeve (17) and a motor (18), the output end of the motor (18) is connected with the screw rod (16), the other end of the screw rod (16) is connected with the sample push plate (15), under the action of the motor (18), the screw rod (16) drives the sample push plate (15) to move along the direction of the screw rod sleeve (17) and pushes the sample to be tested to reach the sample positioning groove.
3. A specimen positioning device for a Charpy impact test according to claim 1, characterized in that: The longitudinal positioning block (8) is vertically arranged with the transverse fixed positioning block (6), the transverse fixed positioning block (6) is located on the same horizontal line with the transverse positioning baffle (7), the transverse positioning baffle (7) is provided with a sliding groove (20) close to the side of the sample, the sliding groove (20) is provided with a sliding rod (19), one end of the sliding rod (19) is movably connected with the sliding groove (20), the transverse fixed positioning block (6) is provided with a sliding rod interface (5) on the corresponding side, when the sliding rod (19) extends out of the sliding groove (20), the other end is connected with the sliding rod interface (5).
4. A specimen positioning device for a Charpy impact test according to claim 1, characterized in that: The positioning device further comprises a clamping device, the clamping device is arranged on both sides of the impact groove (3), the clamping device comprises a movable positioning block (9), an air pressure push rod (10), an air pressure sleeve (11) and an air cylinder (12), the output end of the air cylinder (12) is connected with the air pressure push rod (10), the movable positioning block (9) is connected with the other end of the air pressure push rod (10), the air pressure sleeve (11) is sleeved on the air pressure push rod (10), when the sample to be tested is located in the sample positioning groove, the air cylinder (12) pushes the movable positioning block (9) to compress the sample to be tested.
5. A specimen positioning device for a Charpy impact test according to claim 2, characterized in that: The positioning device further comprises a support (13) and a limiting baffle (14), the pushing device and the transverse positioning baffle (7) are fixed on the support (13), the limiting baffle (14) is fixed on the impact anvil (1), the limiting baffle (14) is located between the pushing device and the clamping device and is used for limiting the sample push plate (15).
6. A specimen positioning device for a Charpy impact test according to claim 1, characterized in that: The impact anvil (1) is fastened on a charpy impact testing machine by a screw (2).
7. A specimen positioning device for a Charpy impact test according to claim 1, characterized in that: The impact groove (3) is a V-shaped groove, and a positioning pointer (4) is movably connected at the bottom end of the impact groove (3).