WO2021253199A1

WO2021253199A1 - Device and method for tensile testing of cold work die steel

Info

Publication number: WO2021253199A1
Application number: PCT/CN2020/096232
Authority: WO
Inventors: 吴正凯
Original assignee: 南京江东实业总公司清江公司
Priority date: 2020-06-15
Filing date: 2020-06-15
Publication date: 2021-12-23

Abstract

Disclosed are a device and method for the tensile testing of cold work die steel. The device comprises a side supporting box (1), an upper beam plate (2), a strip-shaped groove (3), a connecting block (4), an outer ring block (5), a square hole (6), a base platform (7), a recess (8), a support post (9), a lower beam plate (10), an L-shaped plate (11), a computer device (12), a lower clamp (13), an upper clamp (14), a ring cover plate (15), micro cameras (16), a gear (17), a motor (18), an outer gear ring (19), probes (20), an inner ring block (21), a tension sensor (22), a connecting slide groove (23), a first hydraulic push rod (24), a T-shaped slider (25), a pulling block (26), an elongated screw (27), a micro electric motor (28) and a second hydraulic push rod (29). The device has a rational structural design, can place steel vertically, thereby solving the problem of time-consuming and labor-consuming vertical mounting of steel to be tested which has a large mass, can monitor a change in a surface of the same vertical area of the steel, and can comprehensively monitor a change in the surface of the steel by rotating two micro cameras (16) mounted inside the inner ring block (21) and two probes (20) of the same laser rangefinder around the steel, thereby obtaining data of the changes in the surface of the steel and the cross-sectional diameter in each tensile test.

Description

Tensile testing device and method for cold work die steel

Technical field

The invention relates to a tensile testing device and method, in particular to a tensile testing device and method for cold work die steel, belonging to the technical field of cold work die steel testing.

Background technique

Cold work die steel focuses on hardness and wear resistance, and has high carbon content. The alloy elements mainly increase hardenability and improve wear resistance. Cold work die steel includes molds for punching, cold heading and cold extrusion Die, bending die and wire drawing die.

Cold work die steel tensile test equipment, due to the design defects of the corresponding structure, so that the tester is very laborious to erect and fix the heavier quality steel. A single steel tensile test cannot test the surface of each stretched steel in detail. And the size of the cross-sectional diameter change, and at the same time, it is not possible to test the steel in a more comprehensive way. Therefore, a device and method for tensile testing of cold work die steel are proposed in view of the above-mentioned problems.

Summary of the invention

The purpose of the present invention is to provide a tensile testing device and method for cold work die steel in order to solve the above-mentioned problems.

The present invention achieves the above objects through the following technical solutions. A tensile test device for cold work die steel includes a side support box, a lifting mechanism, a rotating mechanism and a push-pull mechanism. The inner surface of the side support box is provided with a square hole , And a second hydraulic push rod is installed on the top wall of the side support box;

The lifting mechanism includes a slender screw, the slender screw is provided with two, and the two slender screws are rotatably installed in the corresponding strip grooves, and the two strip grooves on the same side are symmetrically opened in the corresponding Pull blocks are slidably installed on both sides of the inner surface of the side support box, and one end of the slender screw is installed on the end of the shaft of the micro motor;

The rotating mechanism includes an inner ring block. The toroidal surfaces on both sides of the inner ring block are connected to the two ring cover plates on both sides by rolling balls, and the inner ring wall of the inner ring block has two ring-shaped and equidistant staggered installations. A miniature camera and two probes of the same laser rangefinder, the bottom of the inner ring block is equipped with an outer gear ring, and the outer gear ring is meshed and connected with a gear, and the shaft end on one side of the gear is installed on the shaft of the motor Rod end

The push-pull mechanism includes a first hydraulic push rod, the middle of the first hydraulic push rod is movably installed in the concave structure of the L-shaped plate, and one end of the first hydraulic push rod is movably installed on the middle block of the T-shaped slider, The T-shaped sliding block is slidably engaged in the connecting chute, and the connecting chute is vertically opened on the annular surface of the pillar, the bottom end of the pillar is movably installed in the groove, and the top of the pillar is equipped with a tension sensor. One end of the sensor is installed at the bottom of the lower clamp.

Preferably, there are two side support boxes, and the bottom ends of the two side support boxes are symmetrically and vertically installed on both sides of the top surface of the base table, and the tops of the two side support boxes are fixedly connected to each other by an upper beam plate. , And the upper clamp is installed at the middle position of the bottom of the upper beam plate.

Preferably, the groove is opened in the middle position of the top surface of the lower beam plate, and the two ends of the lower beam plate are respectively located in the square strip holes on the same side, and the corresponding ends of the lower beam plate located in the square strip holes and the second hydraulic push rod One end of the push rod is fixedly connected.

Preferably, the inner ring block is located in the middle of the outer ring block, and the outer ring block is fixedly installed between the two ring cover plates, and the outer ring block has two connecting blocks installed symmetrically and parallel to each other. Two ends of one side of each connecting block are fixedly connected with two corresponding pulling blocks on the same side.

Preferably, the gear is rotatably connected to the ring cover plate at the bottom through a rotating shaft, and the gear is located between the two ring cover plates.

Preferably, one end of the pulling block is provided with a threaded hole, and the pulling block is threadedly connected with the corresponding elongated screw through the threaded hole.

Preferably, the laser rangefinder is installed on the outer surface of one of the side support boxes, and both the laser rangefinder and the micro camera are electrically connected to the computer equipment through a signal transmission line.

Preferably, the computer equipment is installed in the middle of one side of one of the side support boxes, and the computer equipment is electrically connected to the tension sensor through a signal transmission line.

Preferably, one end of the horizontal plate of the L-shaped plate is installed in the middle of one side of the lower beam plate, and the top end surface of the vertical plate of the L-shaped plate is provided with a concave structure.

Preferably, a method of using a tensile testing device for cold work die steel, the method of using includes the following steps:

1. Loading the steel: Place one end of the pre-processed bar-shaped steel in the lower clamp and fasten it to fix it, and the length of the bar-shaped steel is less than the maximum distance between the upper beam and the lower beam, start the first hydraulic pressure When the push rod is in a retracted state, it pulls and drives the pillar slidably connected by the T-shaped slider to rotate from a horizontal position to a vertical position, so that the steel can be placed upright;

2. Both ends of the steel are adjusted and fixed: the top of the erected steel is driven by the second hydraulic push rod to raise the lower beam, which is located in the upper clamp and fixed, while the steel is located in the ring space of the inner ring block;

3. Steel tensile test: start the two second hydraulic push rods at the same time and push the lower beam plate and its connected part to move down between the two side support boxes at the same time, which can be fixed on the upper clamp and the lower clamp The steel between them is deformed and stretched, and the data information is transmitted to the computer equipment through the installation and connection of the tension sensor;

4. Steel appearance monitoring: Start the micro-motor to drive the corresponding slender screw to rotate and drive the pull block and the outer ring block of the connecting block to move up and down along the enclosed bar of steel, by installing two on the inner wall of the inner ring block The two probes of the miniature camera and the same laser rangefinder move up and down in the vertical direction of the bar-shaped steel, which can monitor the changes in the same vertical area of the steel;

In the process of slowly moving up and down, the starter motor drives the gear to rotate, so that the outer gear ring and the connecting part of the meshing connection rotate. The two miniature cameras and the two probes of the same laser rangefinder can be installed in the inner ring block around the steel. Rotate around to fully monitor the surface changes of the steel;

V. Steel surface change data transmission: the micro-camera is used to transfer the image of the surface change of the steel during the tensile test to the computer equipment, and the difference between the two probes of the same laser rangefinder and the steel surface change to the computer In equipment

6. Complete the test.

The beneficial effects of the present invention are:

1. The structure of the present invention is reasonable in design. By activating the first hydraulic push rod in the contracted state, the pillars slidably connected by the T-shaped sliding block are driven to rotate from the horizontal position to the vertical position, so that the steel can be placed upright. The quality of the steel to be tested is heavier, which is a time-consuming and labor-intensive installation.

2. The present invention has a compact structure design. The two miniature cameras installed on the inner wall and the two probes of the same laser rangefinder are driven by the inner ring block that moves up and down to move up and down in the vertical direction of the bar-shaped steel, which can monitor the steel. When the same vertical area changes, the motor is started to drive the gear to rotate at the same time, so that the outer gear ring and the connecting part of the meshing connection rotate, and the two miniature cameras installed in the inner ring block and the two probes of the same laser rangefinder can rotate around Rotating around the steel, the surface changes of the steel can be fully monitored.

3. The present invention transmits the image of the surface change of the steel material in the tensile test to the computer equipment and transmits the difference between the two probes of the same laser rangefinder and the steel surface change to the computer equipment. Obtain the data on the surface and cross-sectional diameter changes of the steel in each tensile test to achieve a more comprehensive test of the steel.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.

Figure 1 is a perspective view of the overall structure of the present invention;

Figure 2 is a schematic diagram of the structure of the rotating mechanism of the present invention;

Figure 3 is a schematic diagram of the structure of the push-pull mechanism of the present invention;

Figure 4 is a schematic diagram of the structure of the lifting mechanism of the present invention;

Figure 5 is a top view of the inner ring block structure of the present invention.

In the picture: 1. Side support box, 2. Upper beam plate, 3. Strip groove, 4. Connecting block, 5. Outer ring block, 6. Square strip hole, 7. Base table, 8. Groove, 9. Pillar, 10, lower beam plate, 11, L-shaped plate, 12, computer equipment, 13, lower clamp, 14, upper clamp, 15, ring cover, 16, micro camera, 17, gear, 18, motor, 19, Outer gear ring, 20, probe, 21, inner ring block, 22, tension sensor, 23, connecting chute, 24, first hydraulic push rod, 25, T-shaped slider, 26, pull block, 27, slender Screw, 28, micro motor, 29, second hydraulic push rod.

detailed description

In order to make the objectives, features, and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

The technical solutions of the present invention will be further described below in conjunction with the drawings and specific implementations.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", and "outer" are based on the drawings shown The orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the pointed device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

Please refer to Figures 1-5, a device and method for tensile testing of cold work die steel, including a side support box 1, a lifting mechanism, a rotating mechanism, and a push-pull mechanism. Strip hole 6, and a second hydraulic push rod 29 is installed on the top wall of the side support box 1;

The lifting mechanism includes an elongated screw 27, the elongated screw 27 is provided with two, and the two elongated screws 27 are rotatably installed in the corresponding strip groove 3, two strip grooves located on the same side 3 are symmetrically opened on both sides of the inner surface of the corresponding side support box 1, and a pulling block 26 is slidably installed in the strip groove 3, and one end of the elongated screw 27 is installed on one end of the shaft of the micro motor 28;

The rotating mechanism includes an inner ring block 21. The toroidal surfaces on both sides of the inner ring block 21 are connected to the two ring cover plates 15 on both sides by rolling balls, and the inner ring walls of the inner ring block 21 are staggered at equal intervals. Two miniature cameras 16 and two probes 20 of the same laser rangefinder are installed. The bottom of the inner ring block 21 is equipped with an outer gear ring 19, and the outer gear ring 19 is in meshing connection with a gear 17. The shaft end on one side of 17 is installed at one end of the shaft of the motor 18;

The push-pull mechanism includes a first hydraulic push rod 24. The middle of the first hydraulic push rod 24 is movably installed in the concave structure of the L-shaped plate 11, and one end of the first hydraulic push rod 24 is movably installed on the T-shaped slider 25. On the middle block, the T-shaped slider 25 is slidably engaged in the connecting chute 23, and the connecting chute 23 is vertically opened on the annular surface of the pillar 9, and the bottom end of the pillar 9 is movably installed in the groove 8. And a tension sensor 22 is installed at the top of the pillar 9, and one end of the tension sensor 22 is installed at the bottom of the lower clamp 13.

There are two side support boxes 1, and the bottom ends of the two side support boxes 1 are installed symmetrically and vertically on both sides of the top surface of the base platform 7, and the top of the two side support boxes 1 passes through the upper beam plate 2. They are fixedly connected to each other, and an upper clamp 14 is installed in the middle of the bottom of the upper beam plate 2.

The groove 8 is opened in the middle position of the top surface of the lower beam plate 10, and the two ends of the lower beam plate 10 are respectively located in the square bar holes 6 on the same side. One end of the push rod 29 is fixedly connected.

The inner ring block 21 is located in the middle position of the outer ring block 5, and the outer ring block 5 is fixedly installed between the two ring cover plates 15, and the outer ring block 5 has two connecting blocks 4 installed symmetrically and in parallel on the annular surface. , And both ends of one side of the two connecting blocks 4 are fixedly connected to two corresponding pulling blocks 26 on the same side.

The gear 17 is rotatably connected with the ring cover plate 15 at the bottom through a rotating shaft, and the gear 17 is located between the two ring cover plates 15.

One end of the pulling block 26 is provided with a threaded hole, and the pulling block 26 is threadedly connected with the corresponding elongated screw 27 through the threaded hole.

The laser rangefinder is installed on the outer surface of one of the side support boxes 1, and both the laser rangefinder and the micro camera 16 are electrically connected to the computer equipment 12 through a signal transmission line.

The computer equipment 12 is installed in the middle of one side of one side support box 1, and the computer equipment 12 is electrically connected to the tension sensor 22 through a signal transmission line.

One end of the horizontal plate of the L-shaped plate 11 is installed in the middle of one side of the lower beam plate 10, and the top end of the vertical plate of the L-shaped plate 11 is provided with a concave structure.

A method of using a tensile testing device for cold work die steel, the method of using includes the following steps:

1. Loading steel: place one end of the pre-processed bar-shaped steel in the lower clamp 13 and tighten it to fix it, and the length of the bar-shaped steel is less than the maximum distance between the upper beam 2 and the lower beam 10, start The first hydraulic push rod 24 in the contracted state pulls and drives the pillar 9 slidably connected by the T-shaped slider 25 to rotate from the horizontal position to the vertical position, so that the steel can be placed upright;

2. Both ends of the steel are adjusted and fixed: the top of the erected steel is driven by the second hydraulic push rod 29 to raise the lower beam plate 10 in the upper clamp 14 and fixed, while the steel is located in the ring block space of the inner ring block 21;

3. Steel tensile test: start two second hydraulic push rods 29 at the same time in the extended state to push the lower beam plate 10 and its connected part to move down between the two side support boxes 1 at the same time, and it can be fixed to the upper clamp The steel between 14 and the lower clamp 13 is deformed and stretched, and the data information is transmitted to the computer device 12 through the tension sensor 22 installed and connected;

4. Steel appearance monitoring: start the micro motor 28 to drive the corresponding slender screw 27 to rotate and drive the pull block 26 and the outer ring block 5 of the connecting block 4 to move up and down along the enclosed bar of steel, by installing the inner ring block 21 The two miniature cameras 16 on the inner wall and the two probes 20 of the same laser rangefinder move up and down in the vertical direction of the bar-shaped steel, which can monitor the changes in the same vertical area of the steel;

In the process of slowly moving up and down, the starter motor 18 drives the gear 17 to rotate, so that the outer gear ring 19 and the connecting part of the meshing connection are rotated, and the two miniature cameras 16 installed in the inner ring block 21 and the two laser rangefinders of the same laser rangefinder can be rotated. A probe 20 rotates around the steel, which can comprehensively monitor the surface changes of the steel;

5. Transmission of steel surface change data: the micro-camera 16 is informed of the surface change image of the steel during the tensile test and transmitted to the computer device 12, and the difference between the two probes 20 of the same laser rangefinder and the steel surface change Transfer to the computer equipment 12;

6. Complete the test.

For those skilled in the art, it is obvious that the present invention is not limited to the details of the foregoing exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the foregoing description, and therefore it is intended to fall within the claims. All the changes within the meaning and scope of the same elements are included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, a person of ordinary skill in the art should understand that: The technical solutions recorded in the embodiments are modified, or some of the technical features are equivalently replaced; these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

A tensile test device for cold work die steel, which is characterized in that it comprises a side support box (1), a lifting mechanism, a rotating mechanism, and a push-pull mechanism. The inner surface of the side support box (1) is provided with a square hole ( 6), and a second hydraulic push rod (29) is installed on the inner top wall of the side support box (1);

The lifting mechanism includes a slender screw (27), the slender screw (27) is provided with two, and the two slender screw (27) are rotatably installed in the corresponding strip groove (3), located Two strip grooves (3) on the same side surface are symmetrically opened on both sides of the inner surface of the corresponding side support box (1), and a pulling block (26) is slidably installed in the strip groove (3). The elongated screw ( 27) One end is installed at one end of the shaft of the micro motor (28);

The rotating mechanism includes an inner ring block (21). The toroidal surfaces on both sides of the inner ring block (21) are in rolling connection with two ring cover plates (15) on both sides through balls, and the inner ring block (21) ) Two miniature cameras (16) and two probes (20) of the same laser rangefinder are installed on the inner ring wall in a circular and equidistant manner. The bottom of the inner ring block (21) is equipped with an outer gear ring (19). ), and the outer gear ring (19) is in meshing connection with the gear (17), and the shaft end on one side of the gear (17) is installed at one end of the shaft of the motor (18);

The push-pull mechanism includes a first hydraulic push rod (24), the middle of the first hydraulic push rod (24) is movably installed in the concave structure of the L-shaped plate (11), and one end of the first hydraulic push rod (24) is movable Installed on the middle block of the T-shaped sliding block (25), the T-shaped sliding block (25) is slidably connected in the connecting chute (23), and the connecting chute (23) is vertically opened on the pillar (9) On the annular surface, the bottom end of the pillar (9) is movably installed in the groove (8), and the top end of the pillar (9) is equipped with a tension sensor (22), and one end of the tension sensor (22) is installed on the lower clamp (13) bottom.
A tensile test device for cold work die steel according to claim 1, characterized in that there are two side support boxes (1), and the bottom ends of the two side support boxes (1) It is installed symmetrically and vertically on both sides of the top surface of the base platform (7), the tops of the two side support boxes (1) are fixedly connected to each other through the upper beam plate (2), and the middle position of the bottom of the upper beam plate (2) is installed Upper fixture (14).
A tensile test device for cold work die steel according to claim 1, wherein the groove (8) is opened in the middle of the top surface of the lower beam plate (10), and the lower beam plate (10) The two ends are respectively located in the square bar hole (6) on the same side, and the corresponding end of the lower beam plate (10) located in the square bar hole (6) is fixedly connected with one end of the push rod of the second hydraulic push rod (29).
A tensile testing device for cold work die steel according to claim 1, characterized in that: the inner ring block (21) is located in the middle of the outer ring block (5), and the outer ring block (5) Fixedly installed between the two ring cover plates (15), the outer ring block (5) has two connecting blocks (4) installed symmetrically and parallelly on the annular surface, and one end of the two connecting blocks (4) is connected with Two corresponding pulling blocks (26) on the same side are fixedly connected.
A tensile test device for cold work die steel according to claim 1, wherein the gear (17) is rotatably connected to the ring cover plate (15) at the bottom through a rotating shaft, and the gear (17) Located between the two ring cover plates (15).
The tensile test device for cold work die steel according to claim 1, characterized in that: one end of the pulling block (26) is provided with a threaded hole, and the pulling block (26) passes through the threaded hole and corresponds to The slender screw (27) threaded connection.
A tensile testing device for cold work die steel according to claim 1, characterized in that: the laser rangefinder is installed on the outer surface of one of the side support boxes (1), and the laser rangefinder and The miniature cameras (16) are electrically connected with the computer equipment (12) through signal transmission lines.
A tensile testing device for cold work die steel according to claim 7, characterized in that the computer equipment (12) is installed in the middle of one side of one of the side support boxes (1), and the computer equipment (12) 12) It is electrically connected with the tension sensor (22) through a signal transmission line.
A tensile testing device for cold work die steel according to claim 1, characterized in that: one end of the transverse plate of the L-shaped plate (11) is installed in the middle of one side of the lower beam plate (10), and the L-shaped plate The top end surface of the vertical board of the board (11) is provided with a concave structure.
According to a tensile testing device for cold work die steel according to claims 1-9, a method for using a tensile testing device for cold work die steel is obtained, characterized in that: the use method includes the following steps :

1. Loading and placing steel: Place one end of the pre-treated bar-shaped steel in the lower clamp (13) and fasten it to fix it, and the length of the bar-shaped steel is smaller than between the upper beam slab (2) and the lower beam slab (10) Start the first hydraulic push rod (24) in a contracted state to pull the pillar (9) slidably connected by the T-shaped slider (25) from the horizontal position to the vertical position, so that the steel can be vertical Stand up

2. Adjust and fix the two ends of the steel: The top of the vertical steel is driven by the second hydraulic push rod (29) to raise the lower beam plate (10), which is located in the upper clamp (14) and fixed, while the steel is located in the inner ring block (21) Within the ring block space;

3. Steel tensile test: start two second hydraulic push rods (29) at the same time in an extended state to push the lower beam plate (10) and its connected part to move down between the two side support boxes (1) at the same time, It can deform and stretch the steel fixed between the upper clamp (14) and the lower clamp (13), and transmit the data information to the computer device (12) by installing and connecting the tension sensor (22);

4. Steel appearance monitoring: start the micro motor (28) to drive the corresponding slender screw (27) to rotate and drive the warp pull block (26) and the outer ring block (5) of the connecting block (4) along the enclosed strip The columnar steel moves up and down, and the two miniature cameras (16) on the inner wall of the inner ring block (21) and the two probes (20) of the same laser rangefinder move up and down in the vertical direction of the columnar steel to monitor Changes in the surface of the steel in the same vertical area;

In the process of slowly moving up and down, the starter motor (18) drives the gear (17) to rotate, so that the outer gear ring (19) and the connecting part of the meshing connection are rotated, and the two miniature cameras (16) installed in the inner ring block (21) can be rotated. ) And the two probes (20) of the same laser rangefinder rotate around the steel, which can fully monitor the surface changes of the steel;

5. Transmission of steel surface change data: the micro-camera (16) learns that the surface change image of the steel during the tensile test is transmitted to the computer device (12) and the two probes (20) of the same laser rangefinder are transmitted to the computer device (12). The difference of the steel surface change distance is transmitted to the computer equipment (12);

6. Complete the test.