CN212031129U

CN212031129U - Clamp for delayed cracking test of steel plate

Info

Publication number: CN212031129U
Application number: CN201922316248.XU
Authority: CN
Inventors: 孟凡月; 李佳宁; 耿志宇; 魏梦麒; 庄云舰
Original assignee: Tangshan Iron and Steel Group Co Ltd; HBIS Co Ltd Tangshan Branch
Current assignee: Tangshan Iron and Steel Group Co Ltd; HBIS Co Ltd Tangshan Branch
Priority date: 2019-12-21
Filing date: 2019-12-21
Publication date: 2020-11-27
Anticipated expiration: 2029-12-21

Abstract

The utility model relates to an anchor clamps for delayed cracking test of steel sheet belongs to metallurgical check out test set field. The clamp comprises a movable clamp (1), a fixed clamp (2), a knob (3), a screw rod (7), a movable clamp jaw (13) and a fixed clamp jaw (14), wherein the screw rod (7) is fixed on the fixed clamp (2); the movable clamp (1) and the knob (3) are assembled on the screw rod (7), the movable clamp (1) can move on the screw rod (7), and the knob (3) is connected with the screw rod (7) in a threaded matching manner; the upper parts of the movable clamp (1) and the fixed clamp (2) are respectively provided with a movable clamp jaw (13) and a fixed clamp jaw (14). The utility model discloses the device preparation is simple and convenient, and is with low costs, and is easy and simple to handle in the use, can realize crooked high-strength steel. The device can be put into a hydrochloric acid environment used for tests to be operated, and has strong adaptability, convenient and safe operation, cost saving, time saving and labor saving.

Description

Clamp for delayed cracking test of steel plate

Technical Field

The utility model relates to an anchor clamps for delayed cracking test of steel sheet belongs to metallurgical check out test set field.

Background

With the increasing demand for lighter weight of automobiles, high-quality materials used in automobiles are increasing, and high-strength steel sheets are used as important components of high-quality materials for automobiles, and the application ratio thereof is also increasing. However, as the strength of the steel sheet is increased, particularly after the tensile strength of the steel sheet reaches or exceeds 1000MPa, the delayed fracture sensitivity of the steel sheet becomes remarkable, and it is necessary to further study the problem that delayed cracking occurs in the high-strength steel sheet during use. The current delayed cracking test method comprises a constant strain test, a low strain rate test and a constant load test. The constant strain test comprises a U-shaped bent beam test, a three-point bending test and a cupping test, and large instruments are used for processing samples. During the test, need to adopt anchor clamps to the high-strength steel sample and hold, use stress strain gauge to detect high-strength steel sample bending degree, make different producers or under the different sample of same producer all keep same stress strain state, put anchor clamps and high-strength steel sample under certain acidic condition, observe the high-strength steel surface crazing line condition when a certain time, or just the time that crazing line just appears in the high-strength steel surface. Therefore, the clamp for the delayed cracking test of the steel plate needs to be designed, and the test requirements are met.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an anchor clamps for steel sheet delay cracking test adopts anchor clamps to grasp to the high-strength steel sample, uses stress strain gauge to detect the high-strength steel sample degree of curvature, makes different producers or the different samples of same producer all keep under the same stress strain state, puts anchor clamps and high-strength steel sample under certain acid condition, observes the high-strength steel surface crazing line condition when certain time, or just the time of crazing line appears in the high-strength steel surface.

The technical scheme of the utility model is that:

a clamp for a steel plate delayed cracking test comprises a movable clamp, a fixed clamp, a knob, a screw rod, a movable clamp jaw and a fixed clamp jaw, wherein the movable clamp and the fixed clamp are in a long strip shape, and the upper parts of the movable clamp and the fixed clamp are respectively provided with the movable clamp jaw and the fixed clamp jaw; the screw rod is fixed on the fixing clamp; the movable clamp and the knob are assembled on the screw rod, the movable clamp can move on the screw rod, and the knob is connected with the screw thread of the screw rod in a matching mode.

The fixing clamp is characterized in that 2 cross beams are arranged on two sides of the fixing clamp, each cross beam is in a long strip shape, one end of each cross beam is fastened with the fixing clamp through a bolt, an upper cover is arranged at the upper end of each cross beam, a jaw opening clamp is arranged at the lower end of each cross beam, each upper cover is a square steel plate and provided with bolt holes, each jaw opening clamp is an N-shaped steel plate, bolt holes are formed in the upper end face of each cross beam, the upper cover and the upper end face of each jaw opening clamp are fixedly connected together through bolts.

The movable clamp jaw and the fixed clamp jaw are the same in shape and are triangular openings, and the included angle of the openings is 40-50 degrees.

The bottom surfaces of the movable clamp jaw and the fixed clamp jaw after being assembled are on the same horizontal plane.

The outer surface of the ring of the knob is provided with 1-4 holes.

The clamp further comprises a rotating hook, wherein the rotating hook comprises a hook handle, a hook point and a hook, the hook is arranged at one end of the hook handle and is in a circular arc shape, the radius of the circular arc is 2-5 mm larger than that of the circular arc of the outer diameter of the knob, the hook point is arranged at the other end of the hook, the hook point is perpendicular to the surface of the circular arc inwards, the length of the hook point is 5-8 mm, and the diameter of the hook point is matched with that of a hole formed in the outer surface of a circular ring of.

And a fixing bolt is arranged on the lower end face of the first web clamp.

The utility model has the advantages that: the utility model discloses the device preparation is simple and convenient, and is with low costs, and is easy and simple to handle in the use, can realize crooked high-strength steel. The device can be put into a hydrochloric acid environment used for tests to be operated, and has strong adaptability, convenient and safe operation, cost saving, time saving and labor saving.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic view of the swivel hook of the utility model;

fig. 3 is a schematic view of the assembly of parts of the device of the invention;

fig. 4 is a schematic view of the usage state of the device of the utility model;

labeled as: the device comprises a movable clamp 1, a fixed clamp 2, a knob 3, a hook handle 4, a jaw clamp 5, a fixed bolt 6, a screw rod 7, a sample 8, an upper cover 9, a cross beam 10, a hook point 11, a hook 12, a fixed clamp jaw 13 and a fixed clamp jaw 14.

Detailed Description

The invention will be further explained by way of example with reference to the accompanying drawings.

As shown in the attached drawings, a clamp for a delayed cracking test of a steel plate comprises a movable clamp 1, a fixed clamp 2, a knob 3, a screw rod 7, a movable clamp jaw 13 and a fixed clamp jaw 14, wherein the movable clamp 1 and the fixed clamp 2 are in a long strip shape, the movable clamp jaw 13 and the fixed clamp jaw 14 are respectively arranged at the upper parts of the movable clamp 1 and the fixed clamp 2, and the screw rod 7 is fixed on the fixed clamp 2; the movable clamp 1 and the knob 3 are assembled on the screw rod 7, the movable clamp 1 can move on the screw rod 7, and the knob 3 is connected with the screw thread of the screw rod 7 in a matching mode. 2 both sides of fixation clamp are provided with 2 crossbeams 10, crossbeam 10 is rectangular form, and bolt and fixation clamp 2 fastening together are passed through to one end, crossbeam 10 upper end is provided with upper cover 9, and the lower extreme is provided with tiger's mouth and presss from both sides 5, upper cover 9 is the square steel sheet, is provided with the bolt hole, tiger's mouth presss from both sides 5 and is N type steel sheet, and the up end is provided with the bolt hole, crossbeam 10, upper cover 9 pass through bolt fixed connection together with tiger's mouth clamp 5's up end. The movable clamp jaw 13 and the fixed clamp jaw 14 are the same in shape and are triangular openings, and the included angle of the openings is 45 degrees. The bottom surfaces of the movable clamp jaw 13 and the fixed clamp jaw 4 after being assembled are on the same horizontal plane. The outer surface of the ring of the knob 3 is provided with 3 holes. The fixture further comprises a rotating hook, the rotating hook comprises a hook handle 4, a hook point 11 and a hook 12, the hook 12 is arranged at one end of the hook handle 4 and is arc-shaped, the radius of the arc is 3 millimeters larger than that of the outer diameter arc of the knob 3, the hook point 11 is arranged at the other end of the hook 12, the arc surface perpendicular to the arc surface is inward, the length of the arc surface is 6 millimeters, and the diameter of the hook point is matched with that of a hole formed in the outer surface of the ring of the knob 3. And a fixing bolt 6 is arranged on the lower end face of the first web clamp 5.

During the test, the clamp is placed on a certain desktop, the fixing bolt 6 rotates anticlockwise to loosen, the tiger's-mouth clamp 5 is inserted into the desktop to clamp the edge of the desktop, and then the fixing bolt 6 rotates clockwise to enable the tiger's-mouth clamp 5 to be tightly fixed with the edge of the desktop. Place the fixation clamp 1 with the inside fixation clamp 13 of fixation clamp 2 with sample 8 in keeping silent, insert the hole of knob 3 with hook point 11, hook 12 twines the rotation along the circular radian of knob 3, drives the knob 3 rotation through swivel hook 4 to make knob 3 rotate on screw 7, make activity clamp 1 compelled the motion, carry out the bending with sample 8.

The device of the utility model is simple and convenient to manufacture and low in cost. The high-strength steel sample is clamped by a clamp, the bending degree of the high-strength steel sample is detected by using a stress strain gauge, so that different samples of different manufacturers or the same manufacturer are kept in the same stress strain state, the clamp and the high-strength steel sample are placed under a certain acidic condition, and the microcrack condition on the surface of the high-strength steel at a certain time or the time when the microcrack just appears on the surface of the high-strength steel is observed. Simple operation in the use process, strong adaptability of the device, time saving and labor saving.

Claims

1. The clamp for the delayed cracking test of the steel plate is characterized by comprising a movable clamp (1), a fixed clamp (2), a knob (3), a screw rod (7), a movable clamp jaw (13) and a fixed clamp jaw (14), wherein the movable clamp (1) and the fixed clamp (2) are in a long strip shape, the movable clamp jaw (13) and the fixed clamp jaw (14) are respectively arranged at the upper parts of the movable clamp (1) and the fixed clamp (2), and the screw rod (7) is fixed on the fixed clamp (2); the movable clamp (1) and the knob (3) are assembled on the screw rod (7), the movable clamp (1) can move on the screw rod (7), and the knob (3) is connected with the screw rod (7) in a threaded matching mode.

2. The clamp for the delayed cracking test of the steel plate according to claim 1, characterized in that 2 cross beams (10) are arranged on two sides of the fixing clip (2), the cross beams (10) are long-shaped, one end of each cross beam is fastened with the fixing clip (2) through a bolt, an upper cover (9) is arranged at the upper end of each cross beam (10), a vice-versa clamp (5) is arranged at the lower end of each cross beam, the upper cover (9) is a square steel plate and provided with bolt holes, the vice-versa clamp (5) is an N-shaped steel plate, the bolt holes are arranged on the upper end face of each cross beam, the upper cover (9) and the vice-versa clamp (5) are fixedly connected through bolts.

3. The clamp for delayed cracking test of steel plate according to claim 1, wherein the movable jaw (13) and the fixed jaw (14) have the same shape, and are triangular openings with an included angle of 40-50 degrees.

4. The clamp for delayed cracking test of steel plate according to claim 3, wherein the bottom surfaces of the movable jaw (13) and the fixed jaw (14) after assembly are at the same horizontal plane.

5. The fixture for delayed cracking test of steel plate according to claim 1, wherein the knob (3) is provided with 1-4 holes on the outer surface of the ring.

6. The clamp for delayed steel plate cracking test according to claim 1, characterized in that the clamp further comprises a rotating hook, the rotating hook comprises a handle (4), a hook point (11) and a hook (12), the hook (12) is arranged at one end of the handle (4) and is in the shape of a circular arc, the radius of the circular arc is 2-5 mm larger than that of the circular arc of the outer diameter of the knob (3), the hook point (11) is arranged at the other end of the hook (12), is perpendicular to the surface of the circular arc inwards, is 5-8 mm long, and has a diameter matched with the diameter of the hole arranged on the outer surface of the ring of the knob (3).

7. The clamp for delayed steel plate cracking test according to claim 2, wherein the lower end surface of the first web clamp (5) is provided with a fixing bolt (6).