CN220019172U - Clamp for calibrating universal testing machine - Google Patents

Abstract

The utility model relates to a clamp for calibrating a universal testing machine, which comprises two cross beams capable of moving up and down on the universal testing machine, wherein two clamp bodies are arranged on opposite sides of the two cross beams, standard force value sensors are clamped between the two clamp bodies, the clamp bodies comprise two supports arranged on the left end and the right end of the side part of the corresponding cross beam, first hydraulic cylinders are arranged on the two supports, piston rods of the two first hydraulic cylinders are opposite and fixedly connected with clamping plates, L-shaped support plates are arranged on opposite sides of the two clamping plates, a second hydraulic cylinder is arranged on the vertical part of each support plate, the piston rods of the second hydraulic cylinders face the corresponding clamping plates and are fixedly connected with limiting plates, inserting rods are uniformly distributed on one side of each limiting plate, first through holes are formed in the clamping plates corresponding to the inserting rods, external threaded columns are connected with the upper ends and the lower ends of the standard force value sensors in a threaded manner, and U-shaped mounting plates are fixedly connected with the external threaded columns. The utility model can realize reliable clamping and convenient disassembly and assembly of the standard force value sensor, does not influence the normal use of the testing machine, and is more practical.

Description

Clamp for calibrating universal testing machine

Technical Field

The utility model belongs to the technical field of universal testing machines, and particularly relates to a clamp for calibrating a universal testing machine.

Background

The universal testing machine is a material testing machine integrating functions of stretching, bending, compressing, shearing, ring stiffness and the like, is most commonly provided with a lever pendulum type and an oil pressure pendulum type, is mainly used for mechanical property tests of metal and nonmetal materials, and is ideal detection equipment for departments such as industrial and mining enterprises, scientific research institutions, universities and colleges, engineering quality monitoring stations and the like.

Currently, in order to ensure the quality of use of a universal testing machine, calibration thereof is often required. When the tensile force value of the universal testing machine is calibrated, the standard force value sensor is required to be clamped and fixed between two longitudinally movable cross beams of the universal testing machine, tension is applied to the standard force value sensor through opposite movement of the two cross beams, then the indication value of the standard force value sensor is compared with the working force value of the testing machine, an error is calculated, if the error is larger than an allowable error range, corresponding testing machine control parameters are required to be adjusted according to the calculated error, and the operation is repeated until the calculated error is within the allowable error range, namely the calibration of the tensile force value of the whole testing machine is completed. And when the fixed standard force value sensor of centre gripping has disclosed a anchor clamps for calibration of universal testing machine in the patent of bulletin number CN 210465128U, through setting up the appearance chamber on the connecting seat, the articulated part of connecting axle is under the convenient articulated circumstances with the connecting seat, establish through spacing portion and appearance chamber card, and spacing portion has the edges and corners, avoid rotation and rocking between spacing portion and the appearance chamber, also avoid rotation and rocking between connecting axle and the connecting seat, there is axial displacement's hidden danger in anchor clamps among the prior art has been solved, influence the technical problem of drawing to the accuracy of calibration, reach anchor clamps fixed stability, draw to the accurate technological effect of calibration. But this anchor clamps all need artifical manual go on with dismantling standard force value sensor at actual clamping, and the operation is comparatively loaded down with trivial details, and is not convenient enough, and the setting of parts such as connecting seat also easily leads to the fact the influence to original anchor clamps on the testing machine, is unfavorable for the normal use after the testing machine calibration, remains to improve.

Disclosure of Invention

Therefore, the utility model aims to provide the clamp for calibrating the universal testing machine, which can realize the stable and reliable clamping and fixing and convenient disassembly and assembly of the standard force value sensor on the premise of not influencing the normal use of the testing machine, so as to solve the problems.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a clamp is used in calibration of universal testing machine, be upper and lower interval setting and all can reciprocate two crossbeams including on the universal testing machine, all be equipped with the anchor clamps main part on the relative one side of two crossbeams, the centre gripping has same standard force value sensor between the two anchor clamps main parts, the anchor clamps main part is including locating two supports on the left and right sides of corresponding crossbeam lateral part, first pneumatic cylinder has all been set firmly to the level on the two supports, the piston rod of two first pneumatic cylinders sets up relatively and equal fixedly connected with splint, all set firmly L shape extension board on the one end that corresponds crossbeam was kept away from to one side of two splint mutually, the horizontal part of extension board is close to the crossbeam setting of correspondence, the splint setting that corresponds is kept away from to vertical part and its top level has set firmly the second pneumatic cylinder, the piston rod of second pneumatic cylinder is towards the splint of correspondence and fixedly connected with limiting plate, the equipartition has a plurality of inserted bars on one side of limiting plate, set up first through-hole on the splint that the inserted bar corresponds, the upper and lower both ends of standard force value sensor have all been seted up the internal thread hole, the threaded hole spiro union has the external screw connection to have been kept away from the outside screw thread value sensor to the inside of the corresponding clamping plate between the two ends of the corresponding clamping plate, the two side of the two standard value sensor is located the two side of the two corresponding clamping plates.

Preferably, the inserted link is matched with the corresponding first through hole and second through hole.

Preferably, the internal threaded hole is matched with a corresponding external threaded column.

Preferably, the standard force value sensor is an S-type force sensor and is electrically connected with a display device.

The beneficial effects of the utility model are as follows: when the calibration is performed, one of the second hydraulic cylinders on the group of clamp main bodies is operated, so that the piston rod of the second hydraulic cylinder is extended, the corresponding limiting plate can be pushed to move towards the corresponding clamping plate until the limiting plate is abutted to the corresponding clamping plate, and the inserted rod on the limiting plate penetrates through the corresponding first through hole. Then, the vertical part of the mounting plate corresponding to the clamping plate on the standard force value sensor is propped against the other side of the clamping plate, and the inserted link penetrates through the second through hole, so that the standard force value sensor can be initially positioned. And then, operating the two first hydraulic cylinders on the clamp main body to extend the piston rods of the two first hydraulic cylinders, so that the clamping plate with the standard force value sensor can be driven to move relatively to the other clamping plate until the other clamping plate is pressed against the other vertical part of the mounting plate. Then, the other second hydraulic cylinder of the clamp main body is operated to push the other limiting plate to move until the other limiting plate is abutted against the corresponding clamping plate and the inserted link on the other limiting plate penetrates through the corresponding first through hole and the corresponding second through hole, so that the fixed connection and installation of the corresponding cross beam and one end of the standard force value sensor can be realized;

then, the height of the other cross beam is adjusted to enable the clamping plate on the other clamp main body to correspond to the mounting plate at the other end of the standard force value sensor. Then, two first hydraulic cylinders on the other clamp main body are operated first, the corresponding two clamping plates are moved relatively until the two clamping plates are abutted to the two vertical parts of the corresponding mounting plate, and then the corresponding two second hydraulic cylinders are operated, so that the corresponding two limiting plates are abutted to the corresponding clamping plates, the corresponding inserted bars penetrate through the corresponding first through holes and the corresponding second through holes, and the other cross beam can be fixedly connected with the other end of the standard force value sensor. The clamping and fixing of the standard force value sensor are completed, then the universal testing machine is operated, the two cross beams are moved oppositely, tension is applied to the standard force value sensor, the indication value of the standard force value sensor is compared with the working force value of the universal testing machine, the error is calculated, if the error is larger than the allowable error range, the corresponding testing machine control parameters are required to be adjusted according to the calculated error, and the operation is repeated until the calculated error is within the allowable error range, namely the calibration of the tensile force value of the whole testing machine is completed. After calibration is completed, only the second hydraulic cylinders on the two clamp main bodies are required to be operated firstly, the limiting plates are driven to retract and reset, the first hydraulic cylinders are operated again, the clamping plates are driven to retract and reset, and the standard force value sensor can be detached, so that the whole operation of clamping and fixing the standard force value sensor is simpler, more convenient and faster, time-saving and labor-saving, and more practical. Meanwhile, the clamping plate clamping and inserting limiting position matched fixing mode is adopted, on one hand, offset dislocation of the standard force value sensor and loosening of the external thread column can be effectively avoided, the stability and reliability of fixing of the standard force value sensor can be guaranteed, subsequent calibration operation is facilitated, calibration quality is guaranteed, on the other hand, the clamp formed by the first hydraulic cylinder and the corresponding clamping plate in a matched mode is also a common clamp on an existing conventional universal testing machine, the second hydraulic cylinder and the corresponding limiting plate can be directly additionally arranged on the clamp, so that when the universal testing machine is used in daily life, the clamping and fixing of the clamping plate to a tested workpiece can be not influenced only by avoiding the inserting rod penetrating through the corresponding first through hole, namely, the normal use of the universal testing machine can not be influenced, and the whole clamp is more practical.

Drawings

FIG. 1 is a schematic diagram of the front view of the present utility model;

FIG. 2 is an enlarged schematic view of the structure of FIG. 1 at A;

FIG. 3 is a schematic front view of the lower clamp body of the present utility model;

FIG. 4 is a schematic top view of the lower clamp body of the present utility model;

FIG. 5 is a schematic side elevational view of the splint of the present utility model;

FIG. 6 is a schematic diagram of the front view of the standard force value sensor of the present utility model with a mounting plate attached;

FIG. 7 is a schematic diagram of the front view of a standard force sensor of the present utility model;

FIG. 8 is a schematic view of the front view of the mounting plate of the present utility model;

FIG. 9 is a schematic side elevational view of the mounting plate of the present utility model;

FIG. 10 is a schematic diagram of the front view structure of the universal testing machine after the standard force value sensor is removed.

Reference numerals in the drawings: the device comprises a universal testing machine 1, a cross beam 2, a standard force value sensor 3, a support 4, a first hydraulic cylinder 5, a clamping plate 6, a supporting plate 7, a second hydraulic cylinder 8, a limiting plate 9, a plug rod 10, a first through hole 11, an internal threaded hole 12, an external threaded column 13, a mounting plate 14 and a second through hole 15.

Detailed Description

The utility model is described in further detail below with reference to the attached drawings and detailed description:

as shown in fig. 1 to 10, a clamp for calibrating a universal testing machine comprises two cross beams 2 which are arranged at intervals up and down and can move up and down on the universal testing machine 1, wherein clamp main bodies are arranged on opposite sides of the two cross beams 2, and a same standard force value sensor 3 is clamped between the two clamp main bodies. The fixture main body comprises two supports 4 arranged at the left end and the right end of the side part of the corresponding cross beam 2, the two supports 4 are horizontally and fixedly provided with first hydraulic cylinders 5, piston rods of the two first hydraulic cylinders 5 are oppositely arranged and fixedly connected with clamping plates 6, and one sides of the two clamping plates 6 opposite to each other are far away from one end of the corresponding cross beam 2 and are fixedly provided with L-shaped supporting plates 7. The horizontal part of extension board 7 is close to the crossbeam 2 setting that corresponds, vertical part keep away from the splint 6 setting that corresponds and its level has set firmly second pneumatic cylinder 8 on, and the piston rod of second pneumatic cylinder 8 is towards splint 6 that corresponds and fixedly connected with limiting plate 9, and the equipartition has a plurality of inserted bars 10 on the one side that limiting plate 9 is close to splint 6 that corresponds, has seted up first through-hole 11 on splint 6 that inserted bar 10 corresponds. The upper and lower both ends of standard force value sensor 3 have all seted up internal thread hole 12, and internal thread hole 12 spiro union has external screw thread post 13, and the one end fixedly connected with U-shaped mounting panel 14 that standard force value sensor 3 was kept away from to external screw thread post 13, and the two vertical parts of mounting panel 14 all face one side that keeps away from standard force value sensor 3 and all have seted up a plurality of second through-holes 15 on it. The mounting plate 14 at the top of the standard force value sensor 3 is clamped between the two clamping plates 6 of the clamp main body positioned at the upper part, the mounting plate 14 at the bottom is clamped between the two clamping plates 6 of the clamp main body positioned at the lower part, the second through holes 15 are in one-to-one correspondence with the first through holes 11 at the same side, and the inserted link 10 is inserted into the inner side of the corresponding mounting plate 14 through the corresponding first through holes 11 and the second through holes 15;

during calibration, one of the second hydraulic cylinders 8 on the clamp main body is operated to extend the piston rod of the second hydraulic cylinder, so that the corresponding limiting plate 9 can be pushed to move towards the corresponding clamping plate 6 until the limiting plate 9 is abutted to the corresponding clamping plate 6 and the inserting rod 10 on the limiting plate 9 penetrates through the corresponding first through hole 11. Then, the vertical portion of the mounting plate 14 corresponding to the clamping plate 6 on the standard force value sensor 3 is abutted to the other side of the clamping plate 6, and the inserted link 10 penetrates through the second through hole 15, so that the standard force value sensor 3 can be initially positioned. Then, the two first hydraulic cylinders 5 on the clamp body are operated to extend the piston rods, so that the clamping plate 6 with the standard force value sensor 3 and the other clamping plate 6 are driven to move relatively and close until the other clamping plate 6 is pressed against the other vertical part of the mounting plate 14. Then, the other second hydraulic cylinder 8 of the clamp main body is operated to push the other limiting plate 9 to move until the other limiting plate 9 is abutted against the corresponding clamping plate 6 and the inserted rod 10 on the other limiting plate is penetrated through the corresponding first through hole 11 and the corresponding second through hole 15, so that the fixed connection and the installation of the corresponding cross beam 2 and one end of the standard force value sensor 3 can be realized;

then, the height of the other cross member 2 is adjusted so that the clamping plate 6 on the other clamp body corresponds to the mounting plate 14 on the other end of the standard force value sensor 3. Then, the two first hydraulic cylinders 5 on the other clamp main body are operated first, so that the corresponding two clamping plates 6 relatively move until being abutted to the two vertical parts of the corresponding mounting plate 14, and then the corresponding two second hydraulic cylinders 8 are operated, so that the corresponding two limiting plates 9 are abutted to the corresponding clamping plates 6, and the corresponding inserting rods 10 penetrate through the corresponding first through holes 11 and the corresponding second through holes 15, so that the other cross beam 2 can be fixedly connected and mounted with the other end of the standard force value sensor 3. Thus, the clamping and fixing of the standard force value sensor 3 are completed, then the universal testing machine 1 is operated, the two cross beams 2 are moved back to back, the tension is applied to the standard force value sensor, then the indication value of the standard force value sensor 3 is compared with the working force value of the universal testing machine 1, the error is calculated, if the error is larger than the allowable error range, the corresponding testing machine control parameters are required to be adjusted according to the calculated error, and the operation is repeated until the calculated error is within the allowable error range, namely, the calibration of the tensile force value of the whole testing machine is completed. After calibration is completed, only the second hydraulic cylinder 8 on the two clamp main bodies is required to be operated firstly, the limiting plate 9 is driven to retract and reset, the first hydraulic cylinder 5 is operated again, the clamping plate 6 is driven to retract and reset, the standard force value sensor 3 can be disassembled, and the whole operation of clamping and fixing the standard force value sensor 3 is simpler, more convenient, more time-saving and more labor-saving, and more practical. Meanwhile, the clamping plate 6 is used for clamping the clamping rod 10 in a plugging and locating matched fixing mode, on one hand, offset dislocation of the standard force value sensor 3 and loosening of the external thread column 13 can be effectively avoided, stability and reliability of fixing the standard force value sensor 3 can be guaranteed, follow-up calibration operation is facilitated, calibration quality is guaranteed, on the other hand, the clamp formed by matching the first hydraulic cylinder 5 with the corresponding clamping plate 6 is also a common clamp on the conventional universal testing machine 1, the second hydraulic cylinder 8 and the corresponding limiting plate 9 can be directly additionally arranged on the clamp, so that when the universal testing machine 1 is used in daily life, clamping and fixing of the clamping plate 6 to a tested workpiece can be unaffected only by avoiding the plugging rod 10 penetrating through the corresponding first through hole 11, namely normal use of the universal testing machine 1 can not be affected, and the whole clamp is more practical. The standard force value sensor 3, the universal testing machine 1 and the two cross beams 2 which can move up and down on the standard force value sensor and the universal testing machine adopt the prior art, and the specific structure and the working principle of the standard force value sensor and the universal testing machine are not described in detail herein.

In this embodiment, the insert rod 10 is adapted to the corresponding first through hole 11 and second through hole 15, so as to ensure that the insert rod 10 can smoothly penetrate through the first through hole 11 and the second through hole 15, and the insert rod is matched to realize effective limit of the mounting plate 14, thereby achieving the purpose of fixing the standard force value sensor 3.

In this embodiment, the internally threaded hole 12 is adapted to the corresponding externally threaded post 13 to ensure a smooth connection between the mounting plate 14 and the standard force sensor 3.

In this embodiment, the standard force value sensor 3 is an existing conventional S-type force sensor, and the two ends of the top and bottom of the standard force value sensor are provided with internal threaded holes for mounting, so that the standard force value sensor can be directly matched for use. The standard force value sensor 3 is electrically connected with the conventional display device (not shown in the figure) and is used for feeding back the detected force value to the display device to display, so that the detected force value is visually compared with the working force value of the universal testing machine 1, and therefore the error value is more favorably calculated, and the calibration operation is completed in a matched manner.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims (4)

1. The utility model provides a clamp is used in calibration of universal testing machine, be the interval setting about and all can reciprocate two crossbeams including on the universal testing machine, all be equipped with the anchor clamps main part on the relative one side of two crossbeams, the centre gripping has same standard force value sensor between the two anchor clamps main parts, a serial communication port, the anchor clamps main part is including locating two supports on the left and right sides of corresponding crossbeam lateral part, equal level has set firmly first pneumatic cylinder on the two supports, the piston rod of two first pneumatic cylinders sets up relatively and equal fixedly connected with splint, all set firmly L shape extension board on the one end that corresponds crossbeam was kept away from to one side of two splint, the horizontal part of extension board is close to the crossbeam setting of correspondence, the splint setting of correspondence and its upper level of vertical part has set firmly the second pneumatic cylinder, the piston rod towards the splint of correspondence and fixedly connected with limiting plate of second pneumatic cylinder, a plurality of inserted bars have been seted up first through-hole on the splint of inserted bar correspondence, the lower both ends of standard force value sensor has all been seted up the internal thread hole, the threaded hole has been set up to the corresponding screw thread hole on the side of two anchor clamps, the outer diameter of the outer thread value sensor is kept away from the one side of the corresponding to two ends of the corresponding mounting panel, the two side of the same mounting panel is kept away from the two standard value sensor, the two-piece is located the two-piece and is located the two-to the one side of the corresponding mounting panel, the two side of the same side of the corresponding mounting panel is located between the two side of the two-piece and the corresponding mounting panel.

2. The universal testing machine calibration jig according to claim 1, wherein the insert pin is adapted to the corresponding first and second through holes.

3. The universal testing machine calibration jig of claim 1, wherein the internally threaded bore is adapted to a corresponding externally threaded post.

4. The fixture for calibrating a universal tester according to claim 1, wherein the standard force sensor is an S-type load cell and is electrically connected to a display device.