CN111289390A

CN111289390A - Cantilever beam impact testing machine

Info

Publication number: CN111289390A
Application number: CN202010174076.1A
Authority: CN
Inventors: 李斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2020-06-16

Abstract

The invention relates to the technical field of non-metallic material toughness detection, and discloses a cantilever beam impact testing machine which comprises a base, a vertical plate, a pendulum placing mechanism, a dial, a base and a sample, wherein the vertical plate is fixedly arranged on the upper surface of the base, the pendulum placing mechanism is fixedly arranged on the right upper corner of the front surface of the vertical plate, the base is fixedly arranged on the upper surface of the base, the dial is fixedly arranged on the front surface of the dial and is positioned right above the base, and the front surface of the vertical plate is movably sleeved with a central rotating shaft. Through the setting of first pendulum, second pendulum and third pendulum for detect three group's sample impact strength simultaneously, obtain three group's data, improve experimental speed, increase test efficiency, and obtain simultaneously and can form effectual contrast between three group's data, more audio-visual data conclusion that obtains reduces the one-by-one simultaneously and examines time measuring, to the influence that next group detected and caused, reduce the deviation that repeated test brought many times, increase experimental accuracy nature.

Description

Cantilever beam impact testing machine

Technical Field

The invention relates to the technical field of non-metallic material toughness detection, in particular to a cantilever beam impact testing machine.

Background

Cantilever beam impact tester is mainly used for measuring the impact strength of plastic cantilever beams under determined conditions, adopts the test method specified in GB/T1843 plastic cantilever beam impact test method, is suitable for rigid thermoplastic plastics and thermosetting plastics, filling and fiber reinforced plastics, and plates of the plastics, including laminated plates, and has the working principle that: the pendulum bob with known energy impacts the sample supporting the vertical cantilever beam once, measures the energy absorbed when the sample is damaged, and calculates the impact strength according to the original cross-sectional area of the sample, the impact line is a fixed distance to the sample clamp, and for the notch sample, the impact line is a fixed distance to the central line of the notch, but the cantilever beam impact tester has some defects in the using process, as follows:

when testing a material, need carry out the repetition test of cubic and above to the same specification material sample, be used for guaranteeing the universality of experimental data, and the accuracy, but current cantilever beam impact tester once can only carry out a test, after the first test, when carrying out next test, can not guarantee experimental environment and cantilever beam impact tester self and can not change, can't make the experimental identity of multiunit, so produce experimental deviation easily, simultaneously, can't make the sample rupture to the sample impact after cantilever beam impact tester's pendulum falls, make pendulum and sample violent striking, cause the pendulum rod bending, damage the instrument.

Disclosure of Invention

The invention provides a cantilever beam impact testing machine which has the advantages of high testing efficiency, excellent performance and high safety and solves the problems in the background technology.

The invention provides the following technical scheme: a cantilever beam impact tester, includes base, riser, puts pendulum mechanism, calibrated scale, base and sample, riser fixed mounting is at the upper surface of base, put pendulum mechanism fixed mounting in the positive upper right corner of riser, base fixed mounting is at the upper surface of base, calibrated scale fixed mounting is in the front of calibrated scale and is located the base directly over, the central pivot has been cup jointed in the positive activity of riser, the middle part pivot has been cup jointed in the activity in the central pivot, the outside pivot has been cup jointed in the activity in the middle part pivot, the front end of central pivot, middle part pivot and outside pivot has movably cup jointed initiative pointer respectively, the rear fixed hub joint that just is located the middle part pivot in the central pivot has first pendulum, the rear fixed mounting that just is located the outside pivot in the middle part pivot has the second pendulum, the rear fixed mounting that just is located the calibrated scale in the outside pivot has the third pendulum, the outer rotating shaft is movably connected with the active pointer, the upper surface of the base is fixedly provided with a clamping device, and the middle of the front surface of the vertical plate and the left side of the central rotating shaft are fixedly provided with a locking device.

Preferably, clamping device has threely, clamping device includes fixed plate, right holder and left holder, fixed plate fixed mounting just is located the right side of base at the upper surface of base, the top threaded connection of fixed plate has the threaded rod, the left end fixedly connected with right holder of threaded rod, the top activity joint of right holder and base, the inside movable mounting of right holder has the rotor plate, the left side bottom fixed mounting of rotor plate has circular magnet, the left side holder just is located the left side of right holder with the last fixed surface of base is connected, the inside fixed mounting of left side holder has the electro-magnet.

Preferably, the attraction force between the electromagnet and the circular magnet is smaller than the impact force of the first pendulum falling to the sample and larger than the impact force of the normal sample.

Preferably, locking device includes the frame, the inside movable mounting of frame has the link, the inside movable mounting at frame both ends has spring one, fixed mounting has V type clamp splice on the link, V type clamp splice has threely, fixedly connected with spring two respectively in the both sides of V type clamp splice, the one end and the link fixed connection of spring two.

Preferably, a diamond-shaped connecting rod is fixedly mounted on the third pendulum.

The invention has the following beneficial effects:

1. compared with the prior art, through the setting of first pendulum, second pendulum and third pendulum for detect three group's sample impact strength simultaneously, obtain three group's data, improve experimental speed, increase test efficiency, and obtain simultaneously and can form effectual contrast between three group's data, more audio-visual data conclusion that obtains reduces the one-by-one simultaneously and examines time measuring, to the influence that next group detected and caused, reduce the deviation that repeated test brought many times, increase experimental accuracy nature.

2. Through clamping device's setting, it exerts pressure to make to carry out the adjustable to the sample, when making first pendulum fall, be not enough with the sample rupture, with the sample perk, reduce the impact that the bottom of first pendulum caused the connecting rod when striking on the sample, effectively prevent that first pendulum from receiving to strike and leading to the fact the bending, improve the security of device, increase the service life of device, simultaneously through locking device's setting, make first pendulum lock after falling, prevent that it from incessantly swaying, reduce the activity time of first pendulum, increase test efficiency.

Drawings

FIG. 1 is a schematic side view of the structure of the present invention;

FIG. 2 is a schematic front view of the structure of the present invention;

FIG. 3 is a schematic front view of a half-section of the structure of the present invention;

FIG. 4 is a schematic view of the installation of the rotating shaft of the structure of the present invention;

FIG. 5 is a schematic view of a structural locking device of the present invention;

FIG. 6 is an enlarged view of the point A in FIG. 2;

FIG. 7 is a schematic view of a spindle connecting rod according to the present invention.

In the figure: 1. a base; 2. a vertical plate; 3. a pendulum placing mechanism; 4. a dial scale; 5. a central rotating shaft; 6. a middle rotating shaft; 7. an external rotating shaft; 8. an active pointer; 9. a first pendulum bob; 10. a second pendulum bob; 11. a third pendulum bob; 12. a base; 13. a clamping device; 131. a fixing plate; 132. a threaded rod; 133. a right clamping seat; 134. a rotating plate; 135. a circular magnet; 136. a left clamping seat; 137. an electromagnet; 14. a sample; 15. a locking device; 151. a frame; 152. a connecting frame; 153. a first spring; 154. a V-shaped clamping block; 155. and a second spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, a cantilever impact tester comprises a base 1, a vertical plate 2, a pendulum placing mechanism 3, a dial 4, a base 12 and a sample 14, wherein the vertical plate 2 is fixedly arranged on the upper surface of the base 1, the pendulum placing mechanism 3 is fixedly arranged on the right upper corner of the front surface of the vertical plate 2, the base 12 is fixedly arranged on the upper surface of the base 1, the dial 4 is fixedly arranged on the front surface of the dial 4 and is positioned right above the base 12, the front surface of the vertical plate 2 is movably sleeved with a central rotating shaft 5, the central rotating shaft 5 is movably sleeved with a middle rotating shaft 6, the middle rotating shaft 6 is movably sleeved with an external rotating shaft 7, the front ends of the central rotating shaft 5, the middle rotating shaft 6 and the external rotating shaft 7 are respectively and movably sleeved with a driving pointer 8, the central rotating shaft 5 and the rear part of the middle rotating shaft 6 are fixedly sleeved with a first pendulum bob 9, the middle rotating shaft, a third pendulum bob 11 is fixedly mounted on the external rotating shaft 7 and behind the dial 4, the external rotating shaft 7 is movably connected with the active pointer 8, a clamping device 13 is fixedly mounted on the upper surface of the base 1, and a locking device 15 is fixedly mounted in the middle of the front surface of the vertical plate 2 and on the left side of the central rotating shaft 5.

Wherein, there are three clamping devices 13, each clamping device 13 includes a fixed plate 131, a right holder 133 and a left holder 136, the fixed plate 131 is fixedly mounted on the upper surface of the base 1 and located on the right side of the base 12, the top of the fixed plate 131 is in threaded connection with a threaded rod 132, the left end of the threaded rod 132 is fixedly connected with the right holder 133, the right holder 133 is movably clamped with the top of the base 12, a rotating plate 134 is movably mounted inside the right holder 133, a circular magnet 135 is fixedly mounted at the bottom of the left side of the rotating plate 134, the left holder 136 is fixedly connected with the upper surface of the base 12 and located on the left side of the right holder 133, an electromagnet 137 is fixedly mounted inside the left holder 136, when the first pendulum 9 falls, the bottom end of the sample 14 does not tilt the circular magnet 135 enough to break the sample, the sample 14 and the rotating plate 134 rotate by a certain angle, so that the first pendulum 9 passes through smoothly, and the impact on the connecting rod when the bottom end of the first pendulum 9 impacts the sample, effectively prevent that first pendulum 9 from receiving the impact and causing the bending, improve the security of device, increase the life of device.

The attractive force between the electromagnet 137 and the circular magnet 135 is smaller than the impact force of the first pendulum bob 9 descending to the sample 14 and larger than the impact force of the normal sample 14, the bottom end of the sample 14 is fixed by the attractive force between the electromagnet 137 and the circular magnet 135, the sample 14 is prevented from rotating randomly, and meanwhile, when the first pendulum bob 9 cannot break the sample 14, the bottom of the sample 14 breaks away from the constraint to start rotating, and the blocking of the first pendulum bob 9 is reduced.

The locking device 15 comprises a frame 151, a connecting frame 152 is movably mounted inside the frame 151, first springs 153 are movably mounted inside two ends of the frame 151, three V-shaped clamping blocks 154 are fixedly mounted on the connecting frame 152, second springs 155 are fixedly connected to two sides of each V-shaped clamping block 154, one ends of the second springs 155 are fixedly connected with the connecting frame 152, after the first pendulum bob 9, the second pendulum bob 10 and the third pendulum bob 11 fall down and break the sample 14, certain potential energy still rotates to the left and enters the V-shaped clamping blocks 154, the V-shaped clamping blocks 154 suck the sample, the connecting frame 152 moves backwards, the first springs 153 are used for buffering, impact of the first pendulum bob 9 is reduced, damage of the first pendulum bob 9 is reduced, the first pendulum bob 9 is rapidly fixed, shaking of the sample is prevented, and rhythm of a test is increased.

The third pendulum bob 11 is fixedly provided with the diamond-shaped connecting rod, so that the wind resistance of the third pendulum bob 11 during descending is reduced, the matching performance of the third pendulum bob 11 and the V-shaped clamping block 154 is improved, the firmness of the third pendulum bob 11 is improved, and the service life of the device is prolonged.

The working principle is that the first pendulum bob 9, the second pendulum bob 10 and the third pendulum bob 11 are respectively and fixedly arranged on the central rotating shaft 5, the middle rotating shaft 6 and the external rotating shaft 7, then the pendulum bob is lifted to the height of the pendulum mechanism 3 and is fixed by the pendulum mechanism 3, the sample 14 is placed between the right holder 133 and the left holder 136, the threaded rod 132 is rotated to enable the right holder 133 to move leftwards to clamp the sample 14, then the electromagnet 137 is electrified to adjust the electromagnetic force, the circular magnet 135 is attracted and clamps the bottom of the sample 14, then the active pointer 8 is reset to zero, the first pendulum bob 9, the second pendulum bob 10 and the third pendulum bob 11 are released simultaneously to impact the sample 14, after the impact is finished, the pendulum bob moves to the position of the locking device 15 and is fixed, the impact force is transmitted to the active pointer 8 by the central rotating shaft 5, the middle rotating shaft 6 and the external rotating shaft 7, the active pointer 8 rotates at a certain angle and forms three groups of corresponding data with the dial 4.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a cantilever beam impact tester, includes base (1), riser (2), puts pendulum mechanism (3), calibrated scale (4), base (12) and sample (14), riser (2) fixed mounting is at the upper surface of base (1), put pendulum mechanism (3) fixed mounting in the positive upper right corner of riser (2), base (12) fixed mounting is at the upper surface of base (1), calibrated scale (4) fixed mounting is in the front of calibrated scale (4) and is located base (12) directly over, its characterized in that: the front activity of riser (2) has cup jointed central pivot (5), the activity has cup jointed middle part pivot (6) on central pivot (5), outside pivot (7) have been cup jointed in the activity on middle part pivot (6), the front end of central pivot (5), middle part pivot (6) and outside pivot (7) has movably cup jointed initiative pointer (8) respectively, the rear that just is located middle part pivot (6) on central pivot (5) is fixed and has been cup jointed first pendulum (9), the rear fixed mounting that just is located outside pivot (7) on middle part pivot (6) has second pendulum (10), the rear fixed mounting that just is located calibrated scale (4) on outside pivot (7) has third pendulum (11), outside pivot (7) and initiative pointer (8) swing joint, the last fixed surface of base (1) installs clamping device (13), the middle part of riser (2) front and the left side fixed mounting who is located central pivot (5) have locking device (15).

2. The cantilever beam impact tester of claim 1, wherein: clamping device (13) have threely, clamping device (13) are including fixed plate (131), right holder (133) and left holder (136), fixed plate (131) fixed mounting just is located the right side of base (12) at the upper surface of base (1), the top threaded connection of fixed plate (131) has threaded rod (132), the left end fixedly connected with right holder (133) of threaded rod (132), the top activity joint of right holder (133) and base (12), the inside movable mounting of right holder (133) has rotor plate (134), the left side bottom fixed mounting of rotor plate (134) has circular magnet (135), the left side of upper surface fixed connection and the left side that is located right holder (133) of left side holder (136) and base (12), the inside fixed mounting of left side holder (136) has electro-magnet (137).

3. The cantilever beam impact tester of claim 2, wherein: the attraction force between the electromagnet (137) and the circular magnet (135) is smaller than the impact force of the first pendulum (9) when the first pendulum (9) descends to the sample (14) and larger than the impact force of the normal sample (14).

4. The cantilever beam impact tester of claim 1, wherein: locking device (15) include frame (151), the inside movable mounting of frame (151) has link (152), the inside movable mounting at frame (151) both ends has spring one (153), fixed mounting has V type clamp splice (154) on link (152), V type clamp splice (154) have threely, the both sides of V type clamp splice (154) are fixedly connected with spring two (155) respectively, the one end and the link (152) fixed connection of spring two (155).

5. The cantilever beam impact tester of claim 1, wherein: and a rhombic connecting rod is fixedly arranged on the third pendulum bob (11).