Auxiliary positioning device for clamping test block of impact testing machine

Abstract

The utility model discloses an impact testing machine test block clamping auxiliary positioning device, and relates to the field of pendulum impact tests. At present, impact test blocks of most pendulum impact testing machines are mounted and clamped by visual inspection of testers according to experience, so that certain mounting and clamping position errors exist. The device comprises a laser emitter, a base, an auxiliary steel ruler and an emitter adjusting device, the laser emitter is installed at the top of the emitter adjusting device, the bottom of the emitter adjusting device is vertically connected with the base, the emitter adjusting device is arranged on one side of a clamping seat on the impact testing machine, a test block is horizontally arranged on the clamping seat, and the auxiliary steel ruler is arranged on the base. A notch structure is formed in the middle of the test block, and the notch structure and a cutting edge of a pendulum bob of the impact testing machine are positioned on the same vertical plane. The test block clamping auxiliary positioning device for the impact testing machine can effectively assist in improving the test block clamping position precision of the impact testing machine. The pendulum impact test device is used for pendulum impact tests.

Description

Technical Field

[0001] The utility model relates to the technical field of inspection and detection, in particular to an auxiliary positioning method for a test block of an impact testing machine. Background Art

[0002] A large part of the foundation of scientific and technological progress is based on the progress and development of materials science. The progress of materials science can be said to directly affect the lifeblood and development of a country. Among them, impact energy is an important indicator of the mechanical properties of reaction materials, and the impact testing machine is the main testing equipment. Factors affecting the experimental results include the error accuracy of the impact testing machine, the processing accuracy of the test block, and the accuracy of the test block clamping position.

[0003] At present, the test block clamping of most pendulum impact testers relies on the test personnel to visually clamp based on their experience, which results in a certain clamping position error. Secondly, when processing the test block, the processing personnel often do not pay enough attention to the requirement of centering the impact notch, which results in the processing error of the test block notch. The accumulation of multiple errors will cause a large offset between the test block notch and the pendulum blade. This has a great impact on the experimental results and is one of the reasons why the test data results of the same group of test blocks vary greatly. Summary of the invention

[0004] The utility model aims to solve the problem that the gap of the test block and the cutting edge of the pendulum are offset during the use of the existing impact tester, and provides an auxiliary positioning device for the test block of the impact tester. By adjusting the overlap of the linear laser on the device with the cutting edge of the pendulum, calibrating the laser, locking the pendulum, and clamping the test block so that the laser line is aligned with the center position of the gap of the test block, the clamping is completed. The function of accurate positioning with a reference line for the test block clamping in the impact test is realized.

[0005] The technical solution of the utility model is:

[0006] An auxiliary positioning device for test block clamping of an impact testing machine comprises a laser transmitter, a base, an auxiliary steel ruler and a transmitter adjustment device, wherein the laser transmitter is mounted on the top of the transmitter adjustment device, the bottom of the transmitter adjustment device is vertically connected to the base, the transmitter adjustment device is arranged on one side of a clamping seat on the impact testing machine, and the auxiliary steel ruler is horizontally placed on the clamping seat.

[0007] The transmitter adjustment device comprises a transmitter fixing frame, a universal adjustment component and a column. The top of the universal adjustment component is connected to the transmitter fixing frame, and the bottom of the universal adjustment component is inserted into the column.

[0008] Furthermore, the universal adjustment assembly includes a rotating ball, an upper cover and a lower cover, and the upper cover and the lower cover are fixed by a set of long rod bolts to form a semi-closed cavity structure, the rotating ball is installed in the cavity structure, and the rotating ball can rotate in the cavity structure.

[0009] Furthermore, the universal adjustment assembly also includes a rubber pad and a baffle, a rubber pad installation groove is opened on one side arc surface of the cavity of the upper cover and the lower cover, and a rubber pad is embedded in the rubber pad installation groove, and the top and bottom of the rubber pad installation groove are connected to the baffle.

[0010] Furthermore, a threaded hole is provided at the joint of the upper cover and the lower cover, and a tightening bolt is screwed into the threaded hole. The bottom end of the tightening bolt passes through the threaded hole and is pressed against the rotating ball.

[0011] Furthermore, an arc-shaped groove is provided at the bottom of the tightening bolt, and a rubber layer with a corresponding structure is provided in the arc-shaped groove.

[0012] Furthermore, the curvature of the arc groove of the tightening bolt is the same as the curvature of the rotating ball.

[0013] Furthermore, the top of the rotating ball is connected to a threaded rod, and the threaded rod is connected to a bottom threaded sleeve of the launcher fixing frame.

[0014] Furthermore, the bottom of the lower cover is connected with an insertion rod, and the insertion rod is inserted into the column.

[0015] Furthermore, one side of the column is connected with an adjusting knob.

[0016] Compared with the prior art, the utility model has the following effects:

[0017] 1. Based on the purpose of eliminating experimental errors as much as possible in the test block clamping link, the utility model has developed an auxiliary positioning device for the test block clamping of the impact testing machine, which improves the clamping position accuracy of the test block, eliminates factors that affect experimental errors as much as possible, improves the accuracy of experimental results, and ensures the quality of experimental results. The test block clamping auxiliary positioning device for the impact testing machine is installed at the pendulum blade corresponding to the impact direction of the impact testing machine, and the linear laser on the adjustment device is overlapped with the pendulum blade to calibrate the laser. After the pendulum is locked, the test block is clamped so that the laser line is aligned with the center position of the test block notch, and the clamping is completed. The function of precise positioning of the test block clamping with a reference line in the impact test is realized. The position accuracy of the test block clamping is guaranteed to a great extent.

[0018] 2. The transmitter adjustment device of the utility model is installed and fixed on the vertical base, and the laser transmitter is installed on the transmitter adjustment device. Through the universal adjustment component on the transmitter adjustment device, the laser transmitter can be flexibly adjusted in angle and direction. At the same time, the universal adjustment component also has a locking function. The transmitter fixing frame is fixed through the universal adjustment component on the transmitter adjustment device, thereby fixing the laser transmitter on the transmitter fixing frame.

[0019] 3. The utility model relates to an auxiliary positioning device for test block mounting of an impact testing machine in the field of inspection and detection technology, which has the advantages of simple structure, convenient manufacturing, low cost, and convenient operation and use. It is an auxiliary positioning device for test block mounting of an impact testing machine that can effectively assist in improving the accuracy of the test block mounting position of the impact testing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2 yes Figure 1 Schematic diagram of the structure of the transmitter adjustment device.

[0022] Figure 3 yes Figure 2 A partial cross-sectional view of the middle part.

[0023] Figure 4 It is a top view of the universal adjustment assembly.

[0024] Figure 5 yes Figure 4 Section view along AA.

[0025] Figure 6 It is a connection diagram of the upper cover and the lower cover.

[0026] Figure 7 yes Figure 6 A partial enlarged view of point B in the middle.

[0027] Figure 8 It is a schematic diagram of the holder structure for installing the test block on the impact testing machine.

[0028] Fig. 9 It is a structural diagram when the notch of the test block is U-shaped. DETAILED DESCRIPTION

[0029] Specific implementation method 1: Combination Figures 1 to 9 The present embodiment is described. The present embodiment is an auxiliary positioning device for clamping a test block of an impact testing machine, which includes a laser transmitter 1, a base 2, an auxiliary steel ruler 3 and a transmitter adjustment device 4. The laser transmitter 1 is installed on the top of the transmitter adjustment device 4, and the bottom of the transmitter adjustment device 4 is vertically connected to the base 2. The transmitter adjustment device 4 is arranged on one side of a holder 6 on an impact testing machine 5, and a test block 7 is horizontally placed on the holder 6, and a notch structure is opened in the middle position of the test block 7, and the notch structure and the cutting edge of the pendulum 8 of the impact testing machine 5 are on the same vertical plane.

[0030] The length of the auxiliary steel ruler 3 is greater than the width of the holder 6 on the impact testing machine 5, so that the auxiliary steel ruler 3 can be placed on the holder 6; the holder 6 is an existing structure, and the function of the holder 6 is mainly to place the test block 7 on the holder 6, so that the center of the test block 7 is impacted by the edge of the pendulum 8 on the impact testing machine 5, so as to judge the impact work, and reflect the mechanical properties of the material through the impact work; the laser emitter 1 is a small linear red light emitter.

[0031] The notch structure on the test block has different structures. The commonly used test block 7 usually has a rectangular notch structure at the center of the test block 7. At the same time, the notch structure of the test block 7 also includes a V-shaped notch structure test block and a U-shaped notch structure test block.

[0032] Specific implementation method 2: Combination Figure 1 and Figure 6 The present embodiment is described as an auxiliary positioning device for a test block of an impact testing machine. The transmitter adjustment device 4 includes a transmitter fixing frame 41, a universal adjustment component 42 and a column 43. The top of the universal adjustment component 42 is connected to the transmitter fixing frame 41, and the bottom of the universal adjustment component 42 is inserted into the column 43.

[0033] The column 43 is a hollow tubular structure, and the bottom of the column 43 is vertically fixed on the base 2 by welding. The base 2 adopts a rectangular steel plate structure. A circular hole is opened on one side of the column 43, and a nut is fixed at the circular hole. An adjusting knob 43-1 is screwed into the nut through a bolt structure. The adjusting knob 43-1 mainly adopts a hexagonal bolt structure, and the end of the adjusting knob 43-1 passes through the nut and extends into the column 43. By setting the tightening and loosening of the adjusting knob 43-1, the end of the adjusting knob 43-1 is placed on the plug rod 42-3, so that the height of the plug rod 42-3 on the universal adjustment assembly 42 can be adjusted.

[0034] Specific implementation method three: Combination Figure 1 and Figure 6 The present embodiment is described. The present embodiment is an auxiliary positioning device for clamping a test block of an impact testing machine. The universal adjustment assembly 42 includes a rotating ball, an upper cover 42-1 and a lower cover 42-2. The upper cover 42-1 and the lower cover 42-2 are fixed by a set of long rod bolts to form a semi-enclosed cavity 44 structure. A rotating ball 45 capable of rotating in the cavity 44 structure is installed in the cavity 44 structure.

[0035] The length and width of the middle upper cover 42-1 and the lower cover 42-2 are the same, wherein a variable diameter circular hole is opened at the center of the upper cover 42-1, and an arched groove is opened in the lower cover 42-2, and the maximum diameter of the arched groove is the same as the maximum diameter of the variable diameter circular hole; the diameter of the rotating ball 45 is slightly smaller than the maximum diameter of the cavity 44, so that the rotating ball 45 can rotate in different directions in the cavity 44.

[0036] Specific implementation method four: Combination Figure 1 and Figure 6 To describe this embodiment, a test block clamping auxiliary positioning device for an impact testing machine is provided in this embodiment, a rubber pad installation groove 46 is provided on one side arc surface in the cavity 44 of the upper cover 42-1 and the lower cover 42-2, and a rubber pad 46-1 is embedded in the rubber pad installation groove 46, and a baffle 47 is connected to the top and bottom of the rubber pad installation groove 46.

[0037] The curvature of the rubber pad installation groove 46 is the same as the arc of the rotating ball 45. The rubber pad installation groove 46 is a rectangular groove structure. The baffle 47 is a baffle 47 structure extending from the surface of the upper cover 42-1 and the lower cover 42-2. By arranging the rubber pad installation groove 46 and the baffle 47 structure on the upper cover 42-1 and the lower cover 42-2, the rubber pad 46-1 installed in the rubber pad installation groove 46 can be limited and shielded to prevent the rubber pad 46-1 from falling off from the rubber pad installation groove 46. By installing the rubber pad 46-1 in the rubber pad installation groove 46, the friction force on the surface of the rotating ball 45 is increased when the rotating ball 45 contacts the rubber pad 46-1.

[0038] Specific implementation method five: Combination Figure 1 and Figure 6 The present embodiment is described as an auxiliary positioning device for test block clamping of an impact testing machine. A threaded hole 48 is provided at the joint of the upper cover 42 - 1 and the lower cover 42 - 2 , and a tightening bolt 49 is screwed into the threaded hole 48 .

[0039] After the upper cover 42-1 is buckled on the top of the lower cover 42-2, the upper cover 42-1 and the lower cover 42-2 are locked by a set of long-rod bolts, and a threaded hole 48 is opened at the intersection of the upper cover 42-1 and the lower cover 42-2. A tightening bolt 49 is screwed into the threaded hole 48, and the end of the tightening bolt 49 can extend into the cavity 44 through the threaded structure.

[0040] Specific implementation method six: Combination Figure 1 and Figure 6 The present embodiment is described, which is a test block clamping auxiliary positioning device for an impact testing machine.

[0041] The bottom of the tightening bolt 49 is provided with an arc-shaped groove 49 - 1 , and a rubber layer 49 - 2 with a corresponding structure is arranged in the arc-shaped groove 49 - 1 .

[0042] The rubber layer 49-2 in the arc groove 49-1 on the tightening bolt 49 is fixed to the end of the tightening bolt 49 by gluing or inserting. When the tightening bolt 49 is rotated, the rubber layer 49-2 on the tightening bolt 49 will press against the spherical surface of the rotating ball 45. At the same time, the tightening bolt will also push the rotating ball 45, pushing the rotating ball 45 to the rubber pad in the rubber pad mounting groove 46, so that the two sides of the rotating ball 45 are squeezed, thereby generating friction on both sides of the rotating ball 45, locking the rotating ball 45 in the cavity 44.

[0043] Specific implementation method seven: Combination Figure 1 and Figure 6 The present embodiment is described as an auxiliary positioning device for test block clamping of an impact testing machine. The bottom of the lower cover 42 - 2 is connected with an insertion rod 42 - 3 , and the insertion rod 42 - 3 is inserted into the column 43 .

[0044] The plane at the bottom of the lower cover 42 - 2 is vertically connected with an insertion rod 42 - 3 , and the insertion rod 42 - 3 is integrally connected to the lower cover 42 - 2 . The diameter of the insertion rod 42 - 3 is smaller than the diameter of the column 43 , so the insertion rod 42 - 3 can be inserted into the column 43 .

[0045] How it works

[0046] like Figure 8 As shown, when the present application locates the center of the notch of the test block 7, the auxiliary positioning device is placed on one side of the holder 6 on the impact tester 5 at a position corresponding to the edge of the pendulum 8 in the impact direction of the impact tester 5 and does not interfere with the movement of the pendulum 8, the laser transmitter 1 is turned on, and the transmitter fixing frame 41 is adjusted by the rotating ball 45 on the universal adjustment component 42, thereby adjusting the laser transmitter 1 on the transmitter fixing frame 41, so that the linear laser of the laser transmitter 1 overlaps with the edge of the pendulum 8 and calibrates the laser line. The rotating ball 45 is locked, and then the pendulum is removed and the safety pin is locked (this action is to first move the pendulum to the working position and take safety protection), and the test block 7 is clamped so that the laser line is aligned with the center of the notch of the test block 7, and the clamping is completed.

[0047] like Fig. 9As shown, the test block 7 has a V-shaped notch structure or a U-shaped notch structure. When the notch structure of the test block 7 is a U-shaped notch structure, if the center point of the notch of the sample is inconvenient to observe, the width of the notch opening of the test block 7 can be measured by a measuring ruler, half of the notch length is taken, and the length value L of half the notch is recorded (at this time, the test block 7 is not placed on the holder 6). Then, the laser of the laser transmitter 1 is used to hit the edge of the pendulum 8 when it is in a drooping state to calibrate the laser position, take the pendulum and lock the safety pin (this action is to first move the pendulum to the working position and take safety protection measures). Place the auxiliary steel ruler 3 (the thickness of the steel ruler is the same as that of the test block 7) on the holder 6, mark the position of the laser line corresponding to the auxiliary steel ruler 3 with a large A, and mark B and C on both sides of A where it intersects with the holder 6. Marking B and C prevents the auxiliary steel ruler 3 from moving and offset, which is convenient for later position adjustment. Mark b and c at the distance L on both sides of point A on the auxiliary steel ruler 3 (where the distance between b and c is the length of the notch of the test block 7). After the auxiliary steel ruler 3 is fixed, adjust the laser angle to align with the marked point b or c and fix the laser transmitter 1. The alignment point can be selected by yourself for convenience of observation or habit. Remove the auxiliary steel ruler 3 to install the test block 7, adjust the edge line of the notch of the test block 7 to coincide with the laser, find the accurate installation position of the test block 7, and start the test after the clamping is completed.

Claims

1. An auxiliary positioning device for test block clamping of an impact testing machine, characterized in that: It comprises a laser transmitter (1), a base (2), an auxiliary steel ruler (3) and a transmitter adjustment device (4), wherein the laser transmitter (1) is mounted on the top of the transmitter adjustment device (4), the bottom of the transmitter adjustment device (4) is vertically connected to the base (2), the transmitter adjustment device (4) is arranged on one side of a holder (6) on an impact testing machine (5), and the auxiliary steel ruler (3) is horizontally placed on the holder (6); The transmitter adjustment device (4) comprises a transmitter fixing frame (41), a universal adjustment component (42) and a column (43), wherein the top of the universal adjustment component (42) is connected to the transmitter fixing frame (41), and the bottom of the universal adjustment component (42) is inserted into the column (43).

2. The test block clamping auxiliary positioning device for an impact testing machine according to claim 1 is characterized in that: The universal adjustment assembly (42) comprises a rotating ball (45), an upper cover (42-1) and a lower cover (42-2), wherein the upper cover (42-1) and the lower cover (42-2) are fixed by a group of long-rod bolts to form a semi-enclosed cavity (44) structure, and the rotating ball (45) is installed in the cavity (44) structure, and the rotating ball (45) can rotate in the cavity (44) structure.

3. The test block clamping auxiliary positioning device for an impact testing machine according to claim 2 is characterized in that: The universal adjustment assembly (42) also includes a rubber pad (46-1) and a baffle (47); a rubber pad installation groove (46) is provided on one side arc surface of the cavity (44) of the upper cover (42-1) and the lower cover (42-2), and a rubber pad (46-1) is embedded in the rubber pad installation groove (46); and the top and bottom of the rubber pad installation groove (46) are connected to the baffle (47).

4. The test block clamping auxiliary positioning device for an impact testing machine according to claim 2 or 3, characterized in that: A threaded hole (48) is provided at the joint of the upper cover (42-1) and the lower cover (42-2), and a tightening bolt (49) is screwed into the threaded hole (48). The bottom end of the tightening bolt (49) passes through the threaded hole (48) and is then pressed against the rotating ball (45).

5. The test block clamping auxiliary positioning device for an impact testing machine according to claim 4 is characterized in that: An arc-shaped groove (49-1) is formed at the bottom of the tightening bolt (49), and a rubber layer (49-2) with a corresponding structure is provided in the arc-shaped groove (49-1).

6. The test block clamping auxiliary positioning device for an impact testing machine according to claim 5, characterized in that: The curvature of the arc groove (49-1) of the tightening bolt (49) is the same as the curvature of the rotating ball (45).

7. The test block clamping auxiliary positioning device for an impact testing machine according to claim 2 or 6, characterized in that: The top of the rotating ball (45) is connected to a threaded rod (45-1), and the threaded rod (45-1) is connected to a bottom threaded sleeve (41-1) of the launcher fixing frame (41).

8. The test block clamping auxiliary positioning device for an impact testing machine according to claim 4 is characterized in that: The bottom of the lower cover (42-2) is connected to an insertion rod (42-3), and the insertion rod (42-3) is inserted into the column (43).

9. The test block clamping auxiliary positioning device for an impact testing machine according to claim 1 or 8, characterized in that: One side of the upright post (43) is connected with an adjusting knob (43-1).

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