CN217059668U - Three-point bending detection clamp - Google Patents

Abstract

The invention discloses a three-point bending detection clamp, and relates to the field of bending clamps. This three point bending detects anchor clamps includes: the hydraulic cylinder comprises a first hydraulic cylinder, wherein a fixed base is fixedly connected with an extending shaft of the first hydraulic cylinder, a slide rail is fixedly connected with the upper surface of the fixed base, the slide rail is assembled with a moving assembly, the moving assembly is connected with two moving seats, a rolling groove is formed in the top of each moving seat, and a rolling shaft is connected to the inner wall of the rolling groove in a rolling manner; the top of the second hydraulic cylinder is connected with an external fixing mechanism, and an extension shaft of the second hydraulic cylinder is fixedly connected with an extrusion rod. This three-point bending detects anchor clamps under the effect of second pneumatic cylinder for the upper surface counterbalance of squeeze bar and product sample, and extrude, then promote the product sample and warp, make the product sample be in the state of three-point atress all the time and experiment, the actual performance index of reflection product that its test result can be fully accurate.

Description

Three-point bending detection clamp

Technical Field

The invention relates to the technical field of bending clamps, in particular to a three-point bending detection clamp.

Background

Fracture toughness is the resistance value which a material exhibits when a crack or crack-like defect occurs in a specimen or component, starting from which rapid fracture no longer occurs with increasing load, i.e. when so-called unstable fracture occurs. Such fracture toughness values can be expressed by a single parameter describing the mechanical state of the crack tip, such as the energy release rate g, the stress intensity factor K, the crack tip opening displacement CTOD and the J integral.

Fracture toughness is an important index of product quality, most of existing detection equipment directly extrudes or stretches a product through a stretching mechanism, and the test result cannot sufficiently and correctly reflect the actual performance index of the product, so that a three-point bending detection clamp is provided.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention discloses a three-point bending detection clamp to solve the problems in the background technology.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: three point bending detects anchor clamps includes:

the hydraulic cylinder comprises a first hydraulic cylinder, wherein a fixed base is fixedly connected with an extending shaft of the first hydraulic cylinder, a slide rail is fixedly connected with the upper surface of the fixed base, the slide rail is assembled with a moving assembly, the moving assembly is connected with two moving seats, the two moving seats are symmetrically arranged, a rolling groove is formed in the top of each moving seat, a rolling shaft is connected on the inner wall of each rolling groove in a rolling manner, two ends of each rolling shaft are fixedly connected with limit shafts, pin shafts are fixedly inserted into the front and back surfaces of each moving seat, and limit springs are fixedly connected between the limit shafts and the pin shafts;

the top of the second hydraulic cylinder is connected with an external fixing mechanism, the second hydraulic cylinder is located above the two movable seats, and an extension shaft of the second hydraulic cylinder is fixedly connected with an extrusion rod.

Preferably, the surfaces of two sides of the bottom end of the extrusion rod are both provided with inclined planes.

Preferably, both ends of the limiting spring are fixedly connected with hanging rings, and the two hanging rings are respectively sleeved on the outer surfaces of the limiting shaft and the pin shaft.

Preferably, the removal subassembly includes constant head tank and spout, the inside and the upper surface at the slide rail are seted up respectively to constant head tank and spout, just constant head tank and spout are linked together, the bottom fixedly connected with draw runner of removal seat, draw runner sliding connection is on the inner wall of spout, it is connected with the dwang to rotate between the bottom of removal seat and the draw runner, extend towards in the constant head tank the bottom of dwang, just the external screw thread has been seted up to the bottom surface of dwang, and has hexagon nut through external screw thread threaded connection, just hexagon nut's both sides outer wall and upper surface laminate with the both sides inner wall and the inner wall of constant head tank respectively.

Preferably, the bottom of moving the seat has seted up the dead slot, the top of dwang extends in the dead slot, and fixedly connected with hexagonal end.

Preferably, the inside of draw runner has seted up the ring channel, the fixed cover in excircle surface of dwang has connect the spacing ring, the spacing ring is laminated with the inner wall of ring channel mutually.

The invention discloses a three-point bending detection clamp which has the following beneficial effects:

1. this three-point bending detects anchor clamps, two roller bearings through setting up, place the top at two roller bearings with the product sample, then under the effect of second hydraulic cylinder, promote the squeeze bar downstream, and then make the squeeze bar offset with the upper surface of product sample, and extrude, then promote the product sample and warp, and at the in-process that warp, two roller bearings of extrusion roll in two rolling grooves respectively, make the product sample be in the state of three-point atress all the time and experiment, the actual performance index of its test result can fully correct reflection product, and after the experiment, under the effect of spacing spring, make the roller bearing resume to initial condition.

2. This three point bending detects anchor clamps through the removal subassembly that sets up, can drive two and remove the seat and remove in the top of slide rail to two distances of removing between the seat of regulation that can be random can be controlled two simultaneously through first pneumatic cylinder and remove the distance between seat and the stripper rod, and then can experiment the product of equidimension not.

Drawings

FIG. 1 is a schematic view of the structure of the present invention;

FIG. 2 is a schematic view of a portion of the present invention;

FIG. 3 is a schematic view of the movable base of the present invention;

fig. 4 is a schematic structural view between the movable base and the slide bar according to the present invention.

In the figure: 1. a first hydraulic cylinder; 101. a fixed base; 102. a slide rail; 103. a movable seat; 104. a rolling groove; 105. a roller; 106. a limiting shaft; 107. a pin shaft; 108. a limiting spring; 2. a second hydraulic cylinder; 201. an extrusion stem; 3. positioning a groove; 301. a chute; 302. a slide bar; 303. rotating the rod; 304. a hexagonal nut; 305. an empty groove; 306. an annular groove; 307. a limit ring.

Detailed Description

The embodiment of the invention discloses a three-point bending detection clamp.

Referring to fig. 1-3, comprising:

the hydraulic cylinder comprises a first hydraulic cylinder 1, wherein an extension shaft of the first hydraulic cylinder 1 is fixedly connected with a fixed base 101, the upper surface of the fixed base 101 is fixedly connected with a slide rail 102, the slide rail 102 is assembled with a moving assembly, the moving assembly is connected with two moving seats 103, the two moving seats 103 are symmetrically arranged, the top of each moving seat 103 is provided with a rolling groove 104, the inner wall of each rolling groove 104 is connected with a rolling shaft 105 in a rolling manner, two ends of each rolling shaft 105 are fixedly connected with limit shafts 106, the front and back of each moving seat 103 are fixedly inserted with pin shafts 107, and limit springs 108 are fixedly connected between the limit shafts 106 and the pin shafts 107;

through the removal subassembly that sets up, can drive two and remove seat 103 and remove in the top of slide rail 102 to two distances of removing between the seat 103 of regulation that can be random can be controlled two simultaneously through first pneumatic cylinder 1 and remove the distance between seat 103 and the stripper rod 201, and then can experiment the product of equidimension not.

The top of the second hydraulic cylinder 2 is connected with an external fixing mechanism, the second hydraulic cylinder 2 is positioned above the two moving seats 103, and an extending shaft of the second hydraulic cylinder 2 is fixedly connected with an extrusion rod 201;

through two roller bearings 105 that set up, place the product sample in the top of two roller bearings 105, then under the effect of second hydraulic cylinder 2, promote the depression bar 201 and move down, and then make the depression bar 201 offset with the upper surface of product sample, and extrude, then promote the product sample and warp, and at the in-process that warp, two roller bearings 105 of extrusion roll in two rolling grooves 104 respectively, make the product sample be in the state of three point atress all the time and experiment, the actual performance index of its test result can fully correct reflection product, and after the experiment, under limiting spring 108's effect, make roller bearing 105 resume to initial condition.

Referring to fig. 1, the bottom end of the pressing rod 201 has two inclined surfaces on both side surfaces.

Referring to fig. 3, two ends of the limiting spring 108 are fixedly connected with hanging rings, and the two hanging rings are respectively sleeved on the outer surfaces of the limiting shaft 106 and the pin shaft 107.

Please refer to fig. 2 and fig. 4, the movable assembly includes a positioning groove 3 and a sliding groove 301, the positioning groove 3 and the sliding groove 301 are respectively disposed inside and on the upper surface of the sliding rail 102, and the positioning groove 3 and the sliding groove 301 are communicated, the bottom fixedly connected with sliding strip 302 of the movable seat 103, the sliding strip 302 is slidably connected to the inner wall of the sliding groove 301, the bottom of the movable seat 103 and the sliding strip 302 are rotatably connected to a rotating rod 303, the bottom of the rotating rod 303 extends toward the positioning groove 3, and the outer surface of the bottom of the rotating rod 303 is provided with an external thread, and is connected to a hexagon nut 304 through the external thread, and the outer walls of two sides and the upper surface of the hexagon nut 304 are respectively attached to the inner walls and the inner top wall of two sides of the positioning groove 3.

Referring to fig. 4, the bottom of the movable base 103 is formed with an empty slot 305, and the top of the rotating rod 303 extends into the empty slot 305 and is fixedly connected with a hexagonal head.

Referring to fig. 4, an annular groove 306 is formed inside the slide bar 302, a limit ring 307 is fixedly sleeved on the outer circumferential surface of the rotating rod 303, the limit ring 307 is attached to the inner wall of the annular groove 306, and the position of the rotating rod 303 is limited by the annular groove 306 and the limit ring 307, so that the rotating rod 303 can only rotate but cannot vertically move.

The working principle is as follows: in the using process, firstly, a product sample is placed above the two rolling shafts 105, then the extrusion rod 201 is pushed to move downwards under the action of the second hydraulic cylinder 2, so that the extrusion rod 201 abuts against the upper surface of the product sample and is extruded, then the product sample is pushed to deform, and in the deformation process, the two rolling shafts 105 are extruded to roll in the two rolling grooves 104 respectively, so that the product sample is always in a three-point stressed state for experiment, the test result can fully and correctly reflect the actual performance index of the product, and after the experiment is finished, the rolling shafts 105 are restored to the initial state under the action of the limiting spring 108;

when product samples with different sizes need to be detected, firstly, the hexagonal end of the rotating rod 303 in the hollow groove 305 is rotated to drive the rotating rod 303 to rotate, and because the hexagonal nut 304 is connected to the bottom end of the rotating rod 303 in a threaded manner, and the outer walls of the two sides of the hexagonal nut 304 are attached to the inner walls of the two sides of the positioning groove 3, the hexagonal nut 304 cannot rotate, the hexagonal nut 304 is driven to move downwards, so that the upper surface of the hexagonal nut 304 is separated from the inner top wall of the positioning groove 3, and at the moment, the two moving seats 103 can be driven to move above the sliding rail 102, so that the distance between the two moving seats 103 can be adjusted at will;

when moving suitable position, the hexagonal end of antiport dwang 303 for hexagon nut 304 rebound, until making the upper surface of hexagon nut 304 closely offset with the interior roof of constant head tank 3, thereby fix the position of removing seat 103, can control two distances between removal seat 103 and the extrusion stem 201 through first pneumatic cylinder 1 simultaneously, and then can experiment the product of equidimension not.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. Three point bending detects anchor clamps, its characterized in that includes:

the hydraulic cylinder comprises a first hydraulic cylinder (1), wherein an extension shaft of the first hydraulic cylinder (1) is fixedly connected with a fixed base (101), the upper surface of the fixed base (101) is fixedly connected with a slide rail (102), the slide rail (102) is assembled with a moving assembly, the moving assembly is connected with two moving seats (103), the two moving seats (103) are symmetrically arranged, the top of each moving seat (103) is provided with a rolling groove (104), the inner wall of each rolling groove (104) is connected with a rolling shaft (105) in a rolling manner, two ends of each rolling shaft (105) are fixedly connected with a limiting shaft (106), the front and back of each moving seat (103) are fixedly inserted with a pin shaft (107), and a limiting spring (108) is fixedly connected between each limiting shaft (106) and each pin shaft (107);

second pneumatic cylinder (2), the top of second pneumatic cylinder (2) is connected with external fixed establishment, second pneumatic cylinder (2) are in two tops that remove seat (103), just the projecting shaft fixedly connected with pressure ram (201) of second pneumatic cylinder (2).

2. The three-point bending detection fixture of claim 1, wherein: the bottom both sides surface of extrusion stem (201) all sets up for the inclined plane.

3. The three-point bending detection fixture of claim 1, wherein: both ends of the limiting spring (108) are fixedly connected with hanging rings, and the two hanging rings are respectively sleeved on the outer surfaces of the limiting shaft (106) and the pin shaft (107).

4. The three-point bending detection fixture of claim 1, wherein: remove the subassembly and include constant head tank (3) and spout (301), set up inside and the upper surface at slide rail (102) respectively in constant head tank (3) and spout (301), just constant head tank (3) and spout (301) are linked together, the bottom fixedly connected with draw runner (302) of removal seat (103), draw runner (302) sliding connection is on the inner wall of spout (301), it is connected with dwang (303) to rotate between bottom and draw runner (302) of removal seat (103), extend in the bottom of dwang (303) towards constant head tank (3), just the external screw thread has been seted up to the bottom surface of dwang (303), and has hexagon nut (304) through external screw thread threaded connection, just the both sides outer wall and the upper surface of hexagon nut (304) laminate mutually with the both sides inner wall and the interior top wall of constant head tank (3) respectively.

5. The three-point bend inspection fixture of claim 4, wherein: an empty groove (305) is formed in the bottom of the movable seat (103), the top end of the rotating rod (303) extends into the empty groove (305), and a hexagonal end head is fixedly connected with the top end of the rotating rod.

6. The three-point bend inspection fixture of claim 4, wherein: annular groove (306) have been seted up to the inside of draw runner (302), the fixed cover in excircle surface of dwang (303) has connect spacing ring (307), the inner wall of spacing ring (307) and annular groove (306) is laminated mutually.

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