CN203838018U - Pendulum impact test platform for surface mechanical properties of metal materials - Google Patents

Abstract

The utility model provides a pendulum impact experiment platform for testing the surface mechanical properties of metal materials, which comprises a support frame, a pendulum assembly, a storage table, a sensor assembly and a secondary impact prevention assembly. The anti-secondary impact component contained in the experimental platform, after the first swing of the pendulum impacts the object to be tested, the dynamic friction plate in the anti-secondary impact component absorbs the static friction plate, and controls the swing of the pendulum by limiting the rotation of the rotating shaft. To prevent secondary impact during the experiment, the sensor component can collect data in real time to improve the accuracy of the experiment. The utility model has the advantages of convenient replacement of the pendulum, simple structure, high precision and stable and reliable system operation.

Description

Pendulum impact test platform for surface mechanical properties of metal materials

technical field

The utility model belongs to the field of performance testing of metal materials, in particular to a pendulum impact experiment platform for testing the mechanical properties of the surface of metal materials.

Background technique

In order to better grasp the mechanical properties of materials, various testing machines for testing the mechanical properties of materials have been designed. At present, the widely used mechanical performance testing machines for testing the rigid impact of metal materials mainly include drop weight impact testing machines and pendulum impact testing machines. The pendulum impact testing machine is a detector used to measure the impact resistance of metal materials under dynamic loads, so as to judge the quality of materials under dynamic loads. The pendulum impact testing machine is divided into manual pendulum impact testing machine, semi-automatic pendulum impact testing machine and fully automatic pendulum impact testing machine according to different control methods.

When the traditional metal pendulum impact testing machine performs the impact test on the mechanical properties of the metal material surface, the pendulum will swing again due to inertia when it swings, causing a secondary impact on the object to be tested, which will affect the accuracy of the measurement results. Although the existing experimental device solves the problem of the pendulum's secondary impact, the result is relatively complicated and the probability of problems is relatively high. Moreover, the traditional metal pendulum impact testing machine generally adopts a hanging pendulum structure, which causes the system to work unstable during the impact test. In addition, the traditional metal pendulum impact testing machine has the disadvantage that the pendulum is not easy to replace, and it is difficult to adjust and change the impact test parameters.

Utility model content

The utility model aims to overcome the defects of the prior art, and provides a pendulum impact experimental platform for testing the mechanical properties of metal materials, which has an anti-secondary impact component. The disk absorbs the static friction disk, and controls the swing of the pendulum by limiting the rotation of the rotating shaft, thereby preventing secondary impact during the experiment. The sensor component can collect data in real time to improve the accuracy of the experiment.

In order to achieve the above object, the technical solution provided by the utility model is:

A pendulum impact test platform for testing the mechanical properties of metal materials, comprising: a support frame, a support plate and a bearing assembly arranged on the support plate, the bearing assembly is provided with a rotating shaft; a pendulum assembly, including a pendulum vertically fixed on the rotating shaft, a pendulum detachably arranged at the lower end of the pendulum and a punch placed at one end of the pendulum; a storage table, the A storage chamber is provided on the storage table for placing the object to be measured; the sensor assembly includes a pressure sensor and a photoelectric encoder, the pressure sensor is arranged on the punch, and the photoelectric encoder is arranged on the On the rotating shaft; the anti-secondary impact assembly is arranged between the swing rod and the bearing assembly, the anti-secondary impact assembly includes a baffle plate with a first through hole in the middle, fixed on the The sleeve, dynamic friction disc, electromagnet and static friction disc on the baffle, the baffle is fixed on the support frame, the sleeve is provided with a second through hole in the axial direction, a first installation hole and a second mounting hole, the second through hole is set in the middle of the sleeve, the moving friction disc is provided with a third through hole and a sliding rod in the axial direction, and the third through hole is set In the middle of the moving friction disc, the rotating shaft passes through the first through hole, the second through hole and the third through hole, a spring is arranged in the first mounting hole, and the sliding The rod is slidingly fitted with the first mounting hole, the end of the sliding rod is connected with one end of the spring, the electromagnet is arranged in the second mounting hole, and the static friction The disk is fixed on the rotating shaft and placed between the swing rod and the dynamic friction disk.

As a preference of the above solution, the upper end of the swing rod is provided with a balance weight whose relative position can be changed.

As a preference of the above solution, the swing rod is a coaxial stepped cylinder, the small-diameter cylinder of the swing rod is provided with external threads, and the balance weight is provided with internal threads that match the external threads. The internal thread, the length of the external thread is greater than the height of the balance weight.

As a preference of the above solution, the first mounting hole is a stepped hole, and one end of the sliding rod is provided with a bump, and the bump is placed in the large diameter hole of the first mounting hole, so The above-mentioned sliding rod is slidingly matched with the small-diameter hole of the first installation hole.

As a preference of the above solution, the storage cavity is a cavity with one side opening, and the opening of the storage cavity faces the punch.

As a preference of the above solution, the storage table is provided with a positioning hole leading to the storage cavity, and a corresponding positioning piece is provided in the positioning hole.

As a preference of the above solution, a shoulder stopper is provided on the rotating shaft, one side of the shoulder stopper is in contact with the rotating shaft, and a first keyway that penetrates radially is provided on the swing rod , the corresponding position of the rotating shaft is provided with a second keyway corresponding to the first keyway, and the swing rod and the rotating shaft are fixed through the cooperation of wedge keys.

As a preference of the above scheme, fixed blocks are symmetrically arranged on both sides of the static friction disc, the static friction disc and the fixed block pass through the rotating shaft, and the fixed blocks are fixed by screws arranged on the fixed block. The static friction disc is fixed on the rotating shaft.

As a preference of the above solution, a base is also included, and the storage table is arranged on the base.

As a preference of the above solution, the bearing assembly includes a bearing seat and a bearing, the bearing seat is arranged on the support plate, the bearing is arranged on the bearing seat, and the rotating shaft is arranged on the bearings mentioned.

Owing to adopting above-mentioned technical scheme, the utility model has the following advantages compared with the prior art:

1. The utility model provides a pendulum impact experimental platform for testing the mechanical properties of metal materials, which has an anti-secondary impact component. When the pendulum swings for the first time, the dynamic friction disc in the anti-secondary impact component absorbs the static friction disc , by limiting the rotation of the rotating shaft to control the swing of the pendulum, thereby preventing secondary impact during the experiment, the sensor component can collect data in real time to improve the accuracy of the experiment.

2. A balance block is set on the upper end of the swing rod. When the angle of the swing rod and the weight of the pendulum are constant, the impact force of the pendulum can be changed by changing the weight and relative position of the balance block.

3. The relative position of the balance weight can be changed by threading the balance weight and the pendulum rod.

4. The first mounting hole in the sleeve is a stepped hole, and one end of the sliding rod is provided with a bump, and the bump is matched with the large-diameter hole of the first mounting hole so that the sliding rod will not be installed from the first mounting hole. slipped through the hole.

5. The storage cavity is an open mouth, which is convenient for placing the object to be tested.

6. There is a positioning hole on the storage table, and the object to be measured is fixed in the storage cavity through the cooperation of the positioning piece and the positioning hole.

7. A shaft shoulder block is provided on the rotating shaft, and the swing rod and the rotating shaft are matched by a wedge key, which can simultaneously limit the movement of the swing rod from two directions on the shaft and on the diameter.

8. There are fixed blocks on both sides of the static friction disc, and the static friction disc is fixed on the rotating shaft by the screws arranged on the fixed blocks to prevent the static friction disc from moving on the rotating shaft on the axis and on the diameter.

9. It also includes the base, and the storage table is set on the base to prevent the pendulum or pendulum from touching the bottom surface during the experiment and affecting the experimental results.

10. The bearing assembly includes a bearing seat and a bearing, and the rotating shaft can be freely rotated by setting the rotating shaft on the bearing.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

Fig. 1 (a) is a schematic structural diagram of the front view direction of a pendulum impact experiment platform for testing the mechanical properties of metal materials provided by the utility model;

Figure 1(b) is the left view of Figure 1(a);

Figure 2 is a cross-sectional view along the A-A direction of Figure 1(a);

Fig. 3 is a partial enlarged view of P in Fig. 2;

Fig. 4 is a schematic diagram of the connection relationship between the dynamic friction disc and the sleeve;

Fig. 5 is a sectional view of the storage table.

Among them, 1. Support frame; 2. Support plate; 3. Bearing assembly; 301. Bearing seat; 302. Bearing; 4. Rotating shaft; 401. Shaft shoulder block; Pendulum; 7. Punch; 8. Balance block; 9. Storage table; 901. Positioning piece; 10. Pressure sensor; 11. Photoelectric encoder; 12. Baffle plate; 13. Sleeve; 14. Dynamic friction disc; 15 16, static friction disc; 1601, fixed block; 1602, screw; 17, sliding rod; 18, bump; 19, spring; 20, base; 21, object to be measured.

Detailed ways

The following will clearly and completely describe the technical solution of the utility model in conjunction with the accompanying drawings of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figures 1-5, the utility model provides a pendulum impact experiment platform for testing the mechanical properties of metal materials, including:

(1) Support frame 1. The support frame 1 is provided with a support plate 2 and a bearing assembly 3 arranged on the support plate. The bearing assembly includes a bearing seat 301 and a bearing 302. The bearing seat 301 is arranged on the support plate 2, the bearing 302 is arranged on the bearing seat 301, and the rotating shaft 4 is arranged on the bearing 302;

(2) A pendulum assembly, including a pendulum 5 vertically fixed at the midpoint of the rotating shaft 4 , a pendulum 6 detachably arranged at the lower end of the pendulum 5 , and a pendulum 6 placed at one end of the pendulum 6 Punch 7, the pendulum can be screwed on the pendulum, the pendulum 5 is a coaxial stepped cylinder, the small diameter cylinder of the pendulum 5 is provided with an external thread, The small-diameter cylinder at the upper end of the swing rod 5 is provided with a balance weight 8, and the inside of the balance weight 8 is provided with an internal thread matched with the external thread, and the length of the external thread is longer than that of the external thread. the height of the counterweight;

(3) The storage table 9, the storage table 9 is provided with a storage cavity for placing the object 21 to be measured, the storage cavity is a cavity with one side opening, and the opening of the storage cavity faces the For the punch 7 described above, the depth of the storage cavity in actual use is slightly smaller than the thickness of the object to be measured, and the positioning table 9 is provided with a positioning hole leading to the storage cavity, and the positioning hole is provided with a The corresponding positioning piece 901, the positioning piece is a bolt, and the positioning hole is a screw hole;

(4) Sensor assembly, including a pressure sensor 10 and a photoelectric encoder 11, the pressure sensor 10 is arranged on the punch 7, and the photoelectric encoder 11 is arranged on the rotating shaft 4;

(5) The anti-secondary impact assembly is arranged between the swing rod 5 and the bearing assembly 3. The anti-secondary impact assembly includes a baffle plate 12 with a first through hole in the middle, fixed on the The sleeve 13, the dynamic friction disc 14, the electromagnet 15 and the static friction disc 16 on the baffle, the baffle 12 is fixed on the support frame 1, and the sleeve 13 is provided with a second Through hole, first installation hole and second installation hole, the second through hole is set in the middle of the sleeve 13, the first installation hole is a stepped hole, and the moving friction disc 14 is axially A third through hole and a sliding rod 17 are arranged on the top, the third through hole is arranged in the middle of the moving friction disc 14, a bump 18 is arranged at one end of the sliding rod, and the bump 18 is placed In the large-diameter hole of the first mounting hole, the sliding rod 17 is slidingly fitted with the small-diameter hole of the first mounting hole, and the rotating shaft 4 passes through the first through hole, The second through hole and the third through hole, the large-diameter hole of the first mounting hole is provided with a spring 19, the sliding rod 17 is slidingly fitted with the first mounting hole, and the sliding rod 17 The end of the spring 19 is connected to one end of the spring 19, the electromagnet 15 is set in the second mounting hole, the static friction disc 16 is fixed on the rotating shaft 4, placed on the Between the above-mentioned fork 5 and the dynamic friction disc 14;

(6) Base 20 , on which the storage table 9 is arranged.

The utility model provides a pendulum impact experiment platform for testing the surface mechanical properties of metal materials, which has an anti-secondary impact component. After the pendulum 6 swings for the first time, the dynamic friction disc 14 in the anti-secondary impact component absorbs the static friction disc. 16. Control the swing of the pendulum 6 by limiting the rotation of the rotating shaft 4, thereby reducing the measurement error and improving the accuracy of the experiment; the upper end of the pendulum 5 is provided with a balance weight 8, when the angle of the pendulum 5 and the weight of the pendulum 6 are constant , the impact force of the pendulum 6 can be changed by changing the weight and relative position of the balance weight 8; the relative position of the pendulum 6 can be changed by threading the pendulum 6 and the pendulum 5; the first mounting hole in the sleeve 13 is A stepped hole, one end of the sliding rod 17 is provided with a bump 18, which cooperates with the large-diameter hole of the first mounting hole through the bump 18, so that the sliding rod 17 will not slip from the first mounting hole; the storage chamber is Open mouth, put into object 21 to be measured conveniently; Be provided with positioning hole on the storage table 9, be fixed in the storage cavity by object 21 to be measured by the cooperation of locator and positioning hole; The storage table 9 is arranged on the base 20, prevents During the experiment, when the pendulum 6 or the pendulum 7 hits the bottom surface, it affects the experimental results.

The working principle of a pendulum impact experiment platform for testing the surface mechanical properties of metal materials provided by the utility model is as follows: first, the object to be tested 21 is placed in the storage chamber of the storage table 9, and the object to be tested 21 is passed through the screw hole by a bolt. fixed, and then select a balance weight 8 with a suitable weight according to the needs of the experiment, and move the balance weight 8 to an appropriate position. At this time, the electromagnet 15 attracts the dynamic friction disc 14, and then pulls the pendulum 6 at a certain angle. At this time, the rotating shaft 4 The photoelectric encoder 11 on the top measures the angle of the pendulum 6, and then makes the pendulum 5 do a circular motion. At this time, the pendulum 6 and the punch 7 make a circular motion. When reaching a certain position, the punch 7 hits the object 21 to be measured, and the impact When the impact force is measured by the pressure sensor 10 on the punch 7, after the fork 5 rebounds, the static friction disc 16 swings together with the rotating shaft 4, then the electromagnet 15 releases the dynamic friction disc 14, and the spring 19 releases and pushes the dynamic friction disc 14 Press the static friction disc 16 to prevent the rotating shaft 4 from rotating, thereby controlling the swing of the fork 5 .

Preferably, as shown in FIG. 2 , a shoulder stopper 401 is provided on the rotating shaft 4 , one side of the shoulder stopper 401 is attached to the rotating shaft 4 , and the swing rod 5 is provided with There is a first keyway that penetrates radially, and the corresponding position of the rotating shaft 4 is provided with a second keyway corresponding to the first keyway, and the swing rod and the rotating shaft pass through a wedge key 501 Match to fix. The rotating shaft 4 is provided with a shoulder stopper 401, and the swing rod 5 cooperates with the rotating shaft 4 through the wedge key 501, which can limit the movement of the swing rod 5 from both directions on the shaft and on the diameter.

As another preferred embodiment, as shown in FIG. 3 , fixed blocks 1601 are arranged symmetrically on both sides of the static friction disc 16 , and the static friction disc 16 and the fixed blocks 1601 pass through the rotating shaft 4 , the static friction disc 16 is fixed on the rotating shaft 4 through the screws 1602 arranged on the fixing block 1601 . Both sides of the static friction disc 16 are provided with fixing blocks 1601, and the static friction disc 16 is fixed on the rotating shaft by screws 1602 arranged on the fixing blocks, so as to prevent the static friction disc 16 from moving on the rotating shaft 4 on the axis and on the diameter.

The above is only a specific embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Anyone familiar with the technical field can easily think of changes or changes within the technical scope disclosed by the utility model Replacement should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (10)

1. a metal material surface Mechanics Performance Testing pendulum impact experiment platform, is characterized in that, comprises

Bracing frame, is provided with back up pad and is arranged at the bearing assembly in described back up pad on described bracing frame, on described bearing assembly, be provided with rotation axis;

Pendulum mass component, comprises the fork that is vertically fixed on described rotation axis, is removable installed in the pendulum of described fork lower end and is placed in the drift of pendulum one end;

Articles holding table, is provided with an object placing cavity, for placing object under test on described articles holding table;

Sensor module, comprises pressure transducer and photoelectric encoder, and described pressure transducer is arranged on described drift, and described photoelectric encoder is arranged on described rotation axis;

Anti-secondary pulse assembly, be arranged between described fork and bearing assembly, in the middle of comprising, described anti-secondary pulse assembly is provided with the baffle plate of the first through hole, be fixed on the sleeve on described baffle plate, kinetic friction dish, electromagnet and static friction dish, described baffle plate is fixed on described bracing frame, described sleeve is provided with the second through hole vertically, the first mounting hole and the second mounting hole, the second described through hole is arranged at the centre of described sleeve, described kinetic friction dish is provided with third through-hole and sliding bar vertically, described third through-hole is arranged at the centre of described kinetic friction dish, described rotation axis is through the first described through hole, the second through hole and third through-hole, in the first described mounting hole, be provided with spring, described sliding bar and described the first mounting hole are slidably matched, the end of described sliding bar is connected with one end of described spring, described electromagnet is arranged in the second described mounting hole, described static friction dish is fixed on described rotation axis, be placed between described fork and kinetic friction dish.

2. metal material surface Mechanics Performance Testing pendulum impact experiment platform according to claim 1, is characterized in that, the upper end of described fork is provided with the counterbalance weight that relative position can change.

3. metal material surface Mechanics Performance Testing pendulum impact experiment platform according to claim 2, it is characterized in that, described fork is coaxial ladder right cylinder, the path right cylinder outside of described fork is provided with external thread, in described counterbalance weight, be provided with the internal thread matching with described external thread, described externally threaded length is greater than the height of described damper weight.

4. metal material surface Mechanics Performance Testing pendulum impact experiment platform according to claim 1, it is characterized in that, the first described mounting hole is shoulder hole, one end of described sliding bar is provided with projection, described projection is placed in the hole, large footpath of the first described mounting hole, and the diameter holes of described sliding bar and described the first mounting hole is slidably matched.

5. metal material surface Mechanics Performance Testing pendulum impact experiment platform according to claim 1, is characterized in that, described object placing cavity is the cavity of a side opening, and the opening of described object placing cavity is towards described drift.

6. metal material surface Mechanics Performance Testing pendulum impact experiment platform according to claim 5, is characterized in that, described articles holding table is provided with the pilot hole that leads to described object placing cavity, is provided with corresponding keeper in described pilot hole.

7. metal material surface Mechanics Performance Testing pendulum impact experiment platform according to claim 1, it is characterized in that, described rotation axis is provided with shaft shoulder block, one side and the rotation axis of described shaft shoulder block are affixed, described fork is provided with the first keyway radially running through, the corresponding position of described rotation axis is provided with second keyway corresponding with the first described keyway, and described fork is matched and is fixed by wedge key with described rotation axis.

8. metal material surface Mechanics Performance Testing pendulum impact experiment platform according to claim 1, it is characterized in that, be provided with to the symmetria bilateralis of described static friction dish fixed block, described static friction dish and fixed block, through described rotation axis, are fixed on described static friction dish on described rotation axis by the screw being arranged on described fixed block.

9. metal material surface Mechanics Performance Testing pendulum impact experiment platform according to claim 1, is characterized in that, also comprises base, and described articles holding table is arranged on described base.

10. metal material surface Mechanics Performance Testing pendulum impact experiment platform according to claim 1, it is characterized in that, described bearing assembly comprises bearing seat and bearing, described bearing seat is arranged in described back up pad, described bearing is arranged on described bearing seat, and described rotation axis is arranged on described bearing.