CN210293882U

CN210293882U - Anti intensity measuring device that rolls over of material piece

Info

Publication number: CN210293882U
Application number: CN201921013177.XU
Authority: CN
Inventors: 林东
Original assignee: Qinhuangdao Daotian Precision Abrasives Co ltd
Current assignee: Qinhuangdao Daotian Precision Abrasives Co ltd
Priority date: 2019-07-02
Filing date: 2019-07-02
Publication date: 2020-04-10
Anticipated expiration: 2029-07-02

Abstract

The utility model provides a material block bending strength measuring device aiming at the defects of high cost of special detection equipment, unsuitability for special detection of material blocks and low detection efficiency when the diamond grinding tool material block is subjected to bending strength detection in the prior art, the measuring device comprises a force measuring device, a force application device and a bending tool, the bending tool comprises a first bending rod, a second bending rod and a third bending rod which are arranged in parallel, the diameters of the second bending rod and the third bending rod are the same and are arranged in the same horizontal plane, the first bending rod is correspondingly arranged above the middle positions of the second bending rod and the third bending rod, the second bending rod and the third bending rod are arranged on a weighing scale of the force measuring device, the force application device is arranged above the first bending rod, the material block is arranged on the upper surfaces of the second bending rod and the third bending rod, the force application device applies downward pressure to the material block through the bending rod, the force measurement device is a weighing meter, the device has the advantages of simple structure, lower manufacturing and maintenance cost and high working efficiency, and can meet the requirement on the measurement precision.

Description

Anti intensity measuring device that rolls over of material piece

Technical Field

The utility model relates to a diamond grinding apparatus field, in particular to anti rupture strength measuring device of material piece.

Background

Some diamond grinding tools are made of a substrate embedded with a material block, the material block grinds a workpiece, the material block is usually made of a material block which is pre-pressed and then hot-pressed, after the diamond grinding tool material block is manufactured, anti-bending test detection is needed, and the service performance of the diamond grinding tool material block can be ensured only by qualified products detected by the anti-bending test. At present, a special bending strength testing machine is generally adopted for detection, but the special bending strength testing machine is high in purchase cost and is not suitable for being specially used for detecting material blocks, so that the detection efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an among the prior art, when carrying out rupture strength detection to diamond grinding apparatus material piece, special check out test set is with high costs, and not enough that the special detection of unsuitable material piece, messenger detection efficiency hang down provides an rupture strength measuring device of material piece.

The utility model aims at realizing through the following technical scheme:

a material block bending strength measuring device comprises a force measuring device, a force application device and a bending tool, wherein the bending tool comprises a first bending rod, a second bending rod and a third bending rod which are arranged in parallel, the diameters of the second bending rod and the third bending rod are the same and are arranged in the same horizontal plane, the first bending rod is correspondingly arranged above the middle position of the second bending rod and the third bending rod, the minimum distance between the second bending rod and the third bending rod is larger than the diameter of the first bending rod, the second bending rod and the third bending rod are arranged on a weighing disc of the force measuring device, the force application device is arranged above the first bending rod, a material block is arranged on the upper surfaces of the second bending rod and the third bending rod, the force application device applies downward pressure to the material block through the pair of bending rods, the force measuring device is a weighing meter, the surface roughness of the first bending rod, the second bending rod and the third bending rod is less than or equal to Ra0.8um, and the hardness of HRC 52-58;

the bending tool further comprises a guide plate and a bottom plate, the bottom plate is arranged on the force measuring device, the guide plate is arranged above the bottom plate in a vertically movable mode, the second bending rod and the third bending rod) are fixed on the weighing disc through the bottom plate, and the first bending rod is fixedly arranged on the lower surface of the guide plate;

the upper surface of the guide plate is fixedly provided with a bearing rod, the bearing rod vertically corresponds to the first bending rod, and the diameter of the bearing rod is larger than that of the first bending rod;

the guide plate is connected with the bottom plate through a guide column, the lower end of the guide column is arranged on the bottom plate, the upper end of the guide column penetrates through the guide plate and is vertically and upwardly arranged, and a limiting nut is arranged at the part, above the guide plate, of the guide column;

the force applying device comprises a force applying arm and a support column, the force applying arm is arranged above the pressure bearing rod, the length direction of the force applying arm is vertical to the axis of the pressure bearing rod, and one end of the force applying arm is rotatably arranged on the support column;

the other end of the force adding arm is provided with a screw, the screw vertically penetrates through the end part of the force adding arm downwards, the screw part above the force adding arm is rotatably provided with a force applying handle, and the force applying handle moves downwards to press the force adding arm;

the supporting column, the screw and the force measuring device are all fixedly arranged on the fixing plate;

the upper surface of the guide plate is provided with a protective sleeve which is divided into three sections, the two side sections are fixedly connected with the guide plate, the inner diameter of the protective sleeve is the same as the outer diameter of the pressure-bearing rod, and the pressure-bearing rod penetrates through the protective sleeve at the two side sections and the middle section.

By adopting the device for measuring the bending strength of the material block, which is provided by the utility model, the bending tool comprises a first bending rod, a second bending rod and a third bending rod which are parallel to each other and have fixed relative positions, the diameters of the three bending rods are equal, the surface roughness is less than or equal to Ra0.8um, and the hardness is HRC 52-58; the second bending rod and the third bending rod are fixed on the bottom plate at fixed intervals and in parallel positions; the whole bending tool part is arranged on a weighing disc of the force measuring device, a material block is horizontally placed on the upper surfaces of a second bending rod and a third bending rod, then the first bending rod and a guide plate are lightly placed above the material block along a guide column, downward pressure is applied to a pressure bearing rod through a force application device handle and a screw rod, the lower part of the material block corresponding to the first bending rod is suspended, when force is applied, the middle position of the material block bends downward due to stress, when the applied pressure is greater than the bending strength borne by the material block, the material block is broken, the force applied value during breaking is recorded, an operator can return the value displayed by the force measuring device to zero before force is applied, when the material block is broken, the value displayed on the force measuring device is the maximum force borne by the material block, and the bending strength of the material block is finally calculated by measuring the sectional area of a fracture; through experimental contrast, through the utility model discloses the anti strength value of rolling over of the material piece that measures accords with the anti test machine detection numerical value of rolling over of specialty. The utility model discloses simple structure, the cost of preparation and maintenance is low, can satisfy the needs of anti test of rolling over moreover in the anti strength test of rolling over to the material piece.

Drawings

FIG. 1 is a schematic front view of a device for measuring flexural strength of a block according to the present invention;

fig. 2 is a top view of fig. 1.

Description of the reference numerals

11. An electronic scale; 12. a fixing plate; 21. a protective sleeve; 22. a guide plate; 23. a pressure bar; 24. a guide post; 25. a limit nut; 26. bending the first rod; 27. bending the second rod; 28. bending the rod III; 29. a base plate; 31. a force application arm; 32. a screw; 33. a handle; 34. a pin shaft; 35. a support pillar; 36. connecting blocks; 40. and (3) material blocks.

Detailed Description

The invention will be further described with reference to specific embodiments:

as shown in fig. 1-2, the utility model provides a device for measuring the bending strength of a material block, which comprises a force measuring device, a force application device and a bending tool. The force measuring device can be a mechanical scale, an electronic scale or an electromechanical combination scale, and the utility model discloses preferred is electronic scale 11. The frock of bending includes deflector 22, bottom plate 29 and three diameter equal and the position is parallel, the fixed bending stick 26 that sets up of interval, bending stick two 27 and bending stick three 28, set up guide post 24 on the deflector 22, guide post 24 lower extreme and bottom plate 29 fixed connection, the upper end runs through the vertical upwards setting of through-hole on the deflector 22, deflector 22 passes through the guide post setting in the top of bottom plate, deflector 22 and guide post 24 sliding fit or uide bushing cooperation, it is smooth and easy to slide like this. Preferably, four guide posts 24 are arranged, and the fixed connecting thread of each guide post 24 is positioned on two end faces; each guide post is provided with a limit nut 25, and the limit nut 25 is in threaded connection with the guide post 24. Bending stick 26 sets up at deflector 22 lower surface, and bending stick 26 can be components of a whole that can function independently fixed connection with deflector 22, also can be an organic whole and set up, the utility model discloses preferred preferably be and be the components of a whole that can function independently setting. The second bending rod 27 and the third bending rod 28 are identical in diameter and fixedly arranged on the upper surface of the base plate 29, the distance between the second bending rod 27 and the third bending rod 28 is fixed, the first bending rod 26 is located above the middle position between the second bending rod 27 and the third bending rod 28, and the distance between the outer circumferences of the second bending rod 27 and the third bending rod 28 is larger than the diameter of the first bending rod 26. The base plate 29 is provided on the scale pan of the electronic scale 11, and the bending tool is provided on the scale pan of the electronic scale 11. In addition, the upper surface of the guide plate 22 is provided with a pressure-bearing rod 23 and a protective sleeve 21, the protective sleeve is divided into three sections, the two side sections are fixedly connected with the guide plate 22, the inner diameter of the protective sleeve is the same as the outer diameter of the pressure-bearing rod 23, and the pressure-bearing rod penetrates through the protective sleeves of the two side sections and the middle section, so that the outer surface of the pressure-bearing rod can be protected by the protective sleeve, damage is prevented from affecting precision, the middle section of the protective sleeve can be flexibly replaced, when the protective sleeve needs to be replaced, the pressure-bearing rod is pulled out, a new middle section is placed between the two side sections, and the pressure-bearing rod is inserted into the three sections, so that the; the pressure-bearing rod 23 and the protective sleeve 21 vertically correspond to the first bending rod 26, and the diameter of the pressure-bearing rod 23 is preferably larger than that of the first bending rod 26. The force application device comprises a force application arm 31 and a support column 35, the support column 35 is vertically arranged on the left side of the electronic scale, the force application arm 31 is arranged above the pressure bearing rod 23, the left end of the force application arm 31 is rotatably connected to the upper end of the support column 35 through a pin shaft 34, the axis of the pin shaft is parallel to the axis of the pressure bearing rod, the right end of the force application arm 31 can be a cantilever end, and during force application, the acting force can be applied to the cantilever end of the force application arm 31. The utility model discloses an among the preferred scheme, set up outside open-ended through-hole and screw rod 32 at afterburning arm 31's right-hand member, screw rod 32 runs through the vertical setting of this through-hole, and this through-hole is the U type hole best, and the part that screw rod 32 is located afterburning arm top has set up handle 33, handle 33 and screw rod threaded connection, and it is fixed that the screw rod is located the below of the arm of force that adds. A fixing plate 12 can be arranged below the electronic scale 11, and the lower ends of the supporting column 35 and the screw rod 32 can be fixedly connected to the fixing plate 12. The lower end of the screw is preferably fixed to the connecting block 36, and the connecting block 36 is fixedly disposed on the fixing plate.

Before operation, firstly, the guide plate is moved towards the direction of the limit nut 25 to vacate a space for placing a material block, the material block 40 is horizontally placed on the upper surfaces of the second bending rod 27 and the third bending rod 28 to be placed in the middle, the guide plate is put down to enable the first bending rod 26 to be in contact with the upper surface of the material block 40, the stress application arm is placed on the protective sleeve 21 and the pressure bearing rod 23, the screw rod 32 penetrates through a through hole in the right side of the stress application arm, the handle is adjusted upwards to be not in contact with the stress application arm, at the moment, the force application device and the bending tool are combined, the material block is supported in a natural state, the electronic scale display is cleared, and; when force is applied, the handle 33 is screwed downwards at a constant speed as much as possible, the right end of the force applying arm 31 is pressed downwards continuously, the force applying arm 31 applies force and generates downward pressure on the protecting sleeve 21 and the pressure bearing rod 23, the pressure bearing rod 23 transmits the pressure to the material block 40 through the guide plate 22 and the bending rod I26, and at the moment, an operator can screw the handle and simultaneously visually display the numerical value change condition of the screen; the bending deformation of the material block 40 is generated along with the gradual increase of the pressure, when the pressure is large enough, the material block 40 is broken, an operator records the reading of the electronic scale 11 when the material block 40 is broken, the reading is the limit pressure born by the material block 40, and the breaking strength of the material block 40 can be calculated through a formula by measuring the area of the broken part. Taking a block with length, width and height of 35 x 3 x 15mm as an example, the diameter of the second bending rod 27 and the third bending rod 28 can be 12-13 mm.

Claims

1. The bending strength measuring device comprises a force measuring device, a force application device and a bending tool, and is characterized in that the bending tool comprises a first bending rod (26), a second bending rod (27) and a third bending rod (28) which are arranged in parallel, the diameters of the second bending rod (27) and the third bending rod (28) are the same and are arranged in the same horizontal plane, the first bending rod (26) is correspondingly arranged above the middle position of the second bending rod (27) and the third bending rod (28), the minimum distance between the second bending rod (27) and the third bending rod (28) is larger than the diameter of the first bending rod (26), the second bending rod (27) and the third bending rod (28) are arranged on a weighing plate of the force measuring device, the force application device is arranged above the first bending rod (26), and a material block (40) is arranged on the upper surfaces of the second bending rod (27) and the third bending rod (28), the force application device applies downward pressure to the material block (40) through the first bending rod (26), the force measurement device is a weighing meter, the surface roughness of the first bending rod (26), the second bending rod (27) and the third bending rod (28) is less than or equal to Ra0.8um, and the hardness is HRC 52-58.

2. The device for measuring the bending strength of the material block according to claim 1, wherein the bending tool further comprises a guide plate (22) and a base plate (29), the base plate (29) is arranged on the force measuring device, the guide plate (22) is arranged above the base plate (29) in a manner of moving up and down, the second bending rod (27) and the third bending rod (28) are fixed on the weighing plate through the base plate (29), and the first bending rod (26) is fixedly arranged on the lower surface of the guide plate (22).

3. The device for measuring the bending strength of the material block as claimed in claim 2, wherein a bearing rod (23) is fixedly arranged on the upper surface of the guide plate (22), the bearing rod (23) is vertically corresponding to the first bending rod (26), and the diameter of the bearing rod (23) is larger than that of the first bending rod (26).

4. The device for measuring the flexural strength of the material block as claimed in claim 2, wherein the guide plate (22) is connected with the bottom plate (29) through a guide column (24), the lower end of the guide column (24) is arranged on the bottom plate (29), the upper end of the guide column (24) penetrates through the guide plate (22) and is arranged vertically upwards, and a limit nut (25) is arranged on the part, above the guide plate (22), of the guide column (24).

5. The device for measuring the flexural strength of the material block according to claim 3, wherein the force application device comprises a force application arm (31) and a support column (35), the force application arm (31) is arranged above the pressure bearing rod (23), the length direction of the force application arm (31) is perpendicular to the axis of the pressure bearing rod (23), and one end of the force application arm (31) is rotatably arranged on the support column (35).

6. The device for measuring the bending strength of the material block according to claim 5, wherein a screw (32) is arranged at the other end of the force applying arm (31), the screw (32) vertically penetrates through the end part of the force applying arm (31) downwards, a force applying handle (33) is arranged on the upper screw (32) part of the force applying arm (31) in a rotating mode, and the force applying handle (33) moves downwards to press the force applying arm (31).

7. A block flexural strength measurement device according to claim 6, characterized in that the support column (35), the screw (32) and the force measurement device are all fixedly arranged on the fixed plate (12).

8. A block flexural strength measurement device according to claim 6, characterized in that the protective sleeve (21) is provided on the upper surface of the guide plate (22), the protective sleeve (21) is composed of three sections, the two sections are fixedly connected with the guide plate (22), the inner diameter of the protective sleeve is the same as the outer diameter of the pressure-bearing rod (23), and the pressure-bearing rod is inserted into the protective sleeves of the two sections and the middle section.