CN214668162U - Chuck structure of tensile testing machine - Google Patents

Abstract

A chuck structure of a tensile testing machine comprises at least one group of clamping parts, each group of clamping parts is provided with two clamping parts which are symmetrically arranged in a matching way, each clamping part mainly comprises a clamping body, a clamping sleeve and a clamp, a step structure matched with the tensile testing machine for use is arranged on the outer side surface of the lower end part of the clamping body, a clamping sleeve is correspondingly arranged on the left side surface and the right side surface of the inner side surface respectively, a left bearing groove is formed in the left side clamping sleeve, one end part of the left bearing groove is of a blind structure, the other end part of the left bearing groove extends out of the right end surface of the left side clamping sleeve, a right bearing groove is formed in the right side clamping sleeve, one end part of the right bearing groove is of a blind structure, the other end part of the right bearing groove extends out of the left end surface of the right side clamping sleeve, left and right end parts of the clamp are correspondingly provided with a left clamping part and a right clamping part respectively, and the left clamping part is matched with the left bearing groove, the right clamping portion is matched with the right bearing groove, and a semicircular notch is formed in the center of the front side face of the clamp.

Description

Chuck structure of tensile testing machine

Technical Field

The utility model relates to a mechanical properties of materials test equipment technical field, in particular to tensile test machine's chuck structure.

Background

The tensile test is one of the most widely used experimental methods in material research, and the authenticity and the accuracy of a tensile test result are directly influenced by the quality of a chuck which is used as a key part of a tensile testing machine.

Now, see fig. 1 for a representation: a tensile testing machine chuck used in the market comprises two clamping parts 1, wherein a V-shaped groove 2 is formed in the inner side surface of each clamping part 1, and a step surface 3 matched with a groove hole in a tensile testing machine is arranged on the outer side surface. When the tested piece (or the clamped piece) is clamped, a clamping space area for clamping the tested piece (or the clamped piece) is formed between the two V-shaped grooves 2, and the distance between the two clamping parts 1 is adjusted to increase or decrease the distance between the two V-shaped grooves 2, so that the size of the clamping space area is changed, and the clamping device is suitable for the tested piece (or the clamped piece) with different sizes and specifications. Before tensile test, through the interval between the two clamping parts 1 of adjustment, make the outer fringe of being tested piece (or by the clamping part) one end respectively with two "V" type groove 2 laminating of clamping part 1 medial surface, realize the centre gripping to this one end of being tested piece (or by the clamping part), the same centre gripping of being tested piece (or by the clamping part) other end can, simultaneously step face 3 that sets up on the lateral surface of clamping part 1 can mutually support with slot structure 4 on the tensile test machine (refer to shown in figure 2, for slot structure 4 on the tensile test machine), so that these two the installation of clamping part 1 is fixed on the tensile test machine. During the tensile test, drive tensile testing machine, this tensile testing machine drives two that are tested (or are being held) one end and correspond 1 removal of clamping part, the other two that are tested (or are being held) the other end and correspond 1 fixed or remove to opposite direction of clamping part to the detection of the piece (or be held) is tested in the realization test. However, the tensile testing machine chucks on the market mainly clamp the sample (the tested piece [ or the clamped piece ]) by single friction force, and the problem is that the slipping phenomenon occurs in the tensile process, which directly causes large errors in the tensile test result.

Disclosure of Invention

The utility model aims to provide a: in view of the above-mentioned deficiencies of the prior art, a collet structure is provided, which not only can better clamp the tested piece (or the clamped piece), but also can clamp the two end portions of the whole tested piece (or the clamped piece) to complete the tensile test, and can also clamp the tested piece (or the clamped piece) part between any distance on the tested piece (or the clamped piece) to complete the tensile test.

The technical scheme who adopts is, the utility model discloses a tensile test machine's chuck structure, chuck structure includes at least a set of clamping part, and every group clamping part has the holder that two symmetric fits arranged, and every holder mainly comprises centre gripping body, clamp cover and anchor clamps, be provided with on the lateral surface of centre gripping body lower extreme tip with the stair structure that tensile test machine cooperation was used, left and right both sides on the medial surface correspond respectively and are provided with one and press from both sides the cover, have seted up a left bearing groove on this left side clamp cover, and the one end tip of this left bearing groove is blind structure, and the other end tip extends the right-hand member terminal surface that the left side pressed from both sides the cover, has seted up a right bearing groove on this right side clamp cover, and the one end tip of this right bearing groove is blind structure, and the other end tip extends the left end terminal surface of right side, the left side of anchor clamps, The right both ends tip corresponds respectively and is provided with left joint portion, right joint portion, and this left joint portion with left side bearing groove matches each other, this right joint portion with right side bearing groove matches each other, the central point department of putting of anchor clamps leading flank sets up the notch of semicircle shape, during the centre gripping, two the holder is in the same place each other laminating, one the notch of the anchor clamps of holder and another the notch of the anchor clamps of holder mutually supports, docks to make these two notches assemble together and form the centre gripping and treat the centre gripping region of holder spare.

The left bearing groove is in a shape like a Chinese character 'yi', an L ', a T' or a cross, and the right bearing groove is in a shape like a Chinese character 'yi', an L ', a T' or a cross.

Further, the left bearing groove and the right bearing groove are symmetrically arranged.

The opening edge at the top end of the notch is provided with a groove or a step.

The left clamping portion and the right clamping portion of the clamp extend towards the outer side face of the clamping body respectively to form a left reinforcing part and a right reinforcing part correspondingly, the clamp is located on the upper surface of the rear portion of the clamp groove opening, a transition part is vertically arranged on the rear side face of the top end of the transition part, a middle reinforcing part extending towards the outer side face of the clamping body is arranged on the rear side face of the top end of the transition part, a left mounting hole matched with the left reinforcing part is formed in the front side face of the clamping body, a right mounting hole matched with the right reinforcing part is formed in the middle mounting hole of the middle reinforcing part, and during assembly, the left reinforcing part, the right reinforcing part and the middle reinforcing part are arranged in the left mounting hole, the right mounting hole and the middle mounting hole of the clamping body respectively and correspondingly.

Further, the left mounting hole, the right mounting hole and the middle mounting hole are through holes, and the left reinforcing piece, the right reinforcing piece and the middle reinforcing piece are respectively and correspondingly arranged in and completely fill the left mounting hole, the right mounting hole and the middle mounting hole of the clamping body.

During the centre gripping, one the binding face that the holder pressed from both sides the cover with another the binding face that the holder pressed from both sides the cover cooperates with the mode of protruding, concave structure, one the binding face and another of holder anchor clamps the binding face of holder anchor clamps cooperates with the mode of protruding, concave structure.

The utility model has the advantages that:

1. the utility model discloses not only act on by the test piece (or by the holder) through the grip area and form compressive stress, the mode centre gripping that the replacement singly leaned on frictional force, make the centre gripping more firm, and because all press from both sides the cover and anchor clamps are equallyd divide do not correspond the left side that is located the grip area, the right side both sides, the grip area's upper and lower both sides region all does not hinder, the event is by the test piece (or by the holder) homoenergetic and reciprocates wantonly, thereby can the whole test piece (or by the holder) both ends tip of centre gripping in order to accomplish tensile test, also can the centre gripping by the test piece (or by the holder) on the test piece (or by the holder) between arbitrary one section distance by the test piece (or by the holder) part in order to accomplish tensile test.

2. The utility model discloses in, through the radius that changes the notch of semicircle shape to can change the centre gripping scope of centre gripping region, with the centre gripping requirement of adaptation to the tested piece of equidimension not, specification.

3. The utility model discloses in, through setting up area groove or step, the mutual amalgamation of anchor clamps that correspond in the different clamping parts for the chamfer of being tested the piece (or by the holder) neck is inseparabler with area groove or step cooperation, is tested the piece (or by the holder) atress more even.

4. The utility model discloses in, through left reinforcement, right reinforcement, well reinforcement, left side mounting hole, right side mounting hole, the design of well mounting hole, on the one hand, make the atress of anchor clamps more even, the slotted hole that on the other hand anchor clamps bore can transmit tensile testing machine again after the centre gripping body need not transmit through pressing from both sides the cover structurally, support by tensile testing machine again (leading to the junction between cover and the centre gripping body to take place to warp easily, damage), but the anchor clamps are direct to be passed through left reinforcement with the power that receives, right reinforcement, well reinforcement, left side mounting hole, right side mounting hole, well mounting hole directly transmits the slotted hole on the tensile testing machine structurally, make whole chuck structure bearing capacity stronger, it is more firm.

5. The utility model discloses in, when through the centre gripping, one the binding face and another that the holder pressed from both sides the binding face that the holder pressed from both sides the cover cooperates with the mode of protruding, concave structure, one the binding face and another of holder anchor clamps the binding face of holder anchor clamps strengthens the bearing capacity of laminating department between two holders with the mode complex design of protruding, concave structure.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic diagram of the prior art;

FIG. 2 is a partial cross-sectional view of a slot structure of a conventional tensile testing machine;

reference numerals: 1-a clamping part; 2- (V-shaped groove); 3-step surface; 4-slotted hole structure.

FIG. 3 is a schematic view showing the structure of a jig according to embodiment 1;

FIG. 4 is a schematic structural view of a clamping body and a collet in example 1;

FIG. 5 is an assembly view of the clamping body, collet, and clamp of example 1;

FIG. 6 is a schematic view showing the structure of a jig according to embodiment 2;

FIG. 7 is a schematic structural view of a clamping body and a collet in example 2;

FIG. 8 is an assembly view of the holder body, the collet, and the jig in example 2.

Reference numerals: 5, a clamping piece; 6, clamping the body; 7, jacket; 8, clamping; 9-step structure; 10-left load-bearing trough; 11-right bearing groove; 12-a left snap-in part; 13-right clamping part; 14-a notch; 15-left reinforcement; 16-right reinforcement; 17-a middle reinforcement; 18-left mounting hole; 19-right mounting hole; 20-a central mounting hole; 21-transition piece.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the description of the embodiments, the terms "disposed," "connected," and the like are to be construed broadly unless otherwise explicitly specified or limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; either directly or through an intervening medium, or through internal communication between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

The technical solution of the present invention is explained in detail with reference to a plurality of embodiments.

The first embodiment is as follows:

as shown in fig. 3 to 5, a collet structure of a tensile testing machine includes at least one set of clamping portions.

Each group of clamping parts is provided with two clamping pieces 1 which are symmetrically matched and arranged, each clamping piece 1 mainly comprises a clamping body 6, a clamping sleeve 7 and a clamp 8,

the outer side surface of the end part of the lower end of the clamping body 6 is provided with a step structure 9 (prior art characteristic) matched with the tensile testing machine for use, the left side and the right side on the inner side surface are respectively and correspondingly provided with a clamping sleeve 7, the left side clamping sleeve 7 is provided with a left bearing groove 10, one end part of the left bearing groove 10 is of a blind structure, the other end part extends out of the right end surface of the left side clamping sleeve 7, the right side clamping sleeve 7 is provided with a right bearing groove 11, one end part of the right bearing groove 11 is of a blind structure, and the other end part extends out of the left end surface of the right side clamping sleeve 7.

The left end and the right end of the clamp 8 are respectively and correspondingly provided with a left clamping portion 12 and a right clamping portion 13, the left clamping portion 12 is matched with the left bearing groove 10, the right clamping portion 13 is matched with the right bearing groove 11, and a semicircular notch 14 is formed in the center of the front side face of the clamp 8.

When clamping, the two clamping pieces 1 are attached to each other, the notch 14 of the clamp 8 of one clamping piece 1 is matched and butted with the notch 14 of the clamp 8 of the other clamping piece 1, so that the two notches 14 are combined together to form a clamping area for clamping a component to be clamped.

The embodiment not only forms compressive stress on the tested piece (or the clamped piece) through the action of the clamping area, replaces the clamping by means of friction force singly, and enables the clamping to be more stable, but also enables the tested piece (or the clamped piece) to move up and down randomly because all the clamping sleeves 7 and the clamps 8 are respectively and correspondingly positioned on the left side and the right side of the clamping area, and the upper side area and the lower side area of the clamping area are not blocked, so that the two end parts of the whole tested piece (or the clamped piece) can be clamped to complete the tensile test, and the part of the tested piece (or the clamped piece) between any distance on the tested piece (or the clamped piece) can be clamped to complete the tensile test.

In this embodiment, the radius of the semicircular notch 14 is changed, so that the clamping range of the clamping area can be changed to meet the clamping requirements of the tested pieces with different sizes and specifications.

The left bearing groove 10 is in a shape of a straight line, an L shape, a T shape or a cross shape, and the right bearing groove 11 is in a shape of a straight line, an L shape, a T shape or a cross shape.

The left bearing groove 10 and the right bearing groove 11 are arranged symmetrically with each other.

The opening edge at the top end of the notch 14 is provided with a groove or a step. Through setting up area groove or step, the mutual amalgamation of the anchor clamps 8 that correspond in the different clamping parts for the chamfer and the area groove or the step cooperation of being tested (or by the clamping part) neck are inseparabler, and it is more even by the atress of being tested (or by the clamping part).

And in the tensile test, the end parts of the two ends of the tested piece (or the clamped piece) are correspondingly clamped in the two clamping areas respectively, so that the end parts of the two ends of the whole tested piece (or the clamped piece) are clamped to complete the tensile test. The end parts of two ends of any section of the tested piece (or the clamped piece) are correspondingly clamped in the two clamping areas respectively, so that the part of the tested piece (or the clamped piece) between any section of distance on the tested piece (or the clamped piece) is clamped to complete the tensile test. The segmented tensile test is mainly performed on a waste test piece (or a clamped piece). After the segmented tensile test is finished, the segment part of the tested piece (or the clamped piece) which meets the requirement (specified according to the actual situation) is directly reused, and the segment part of the tested piece (or the clamped piece) which does not meet the requirement is returned to the furnace for new manufacturing and molding, and the segment part of the tested piece (or the clamped piece) which meets the requirement is reused after the tensile test is achieved, [ namely, the segment part of the tested piece (or the clamped piece) which meets the requirement is reserved ].

In addition, after the tested piece (or the clamped piece) is clamped, a gap still exists between the opposite surfaces of the two notches 14 forming the clamping area, and the design can be suitable for the tested piece (or the clamped piece) with different sizes and specifications. The chuck structure mainly aims at a strip-shaped tested piece (or a clamped piece).

Example two:

as shown in fig. 6 and 8, the other structure of the second embodiment is the same as that of the first embodiment, except that:

the left clamping portion and the right clamping portion of the clamp extend towards the outer side face of the clamping body respectively to form a left reinforcing piece 15 and a right reinforcing piece 16 correspondingly, a transition piece 21 is vertically arranged on the upper surface of the clamp behind the notch of the clamp, and a middle reinforcing piece 17 extending towards the outer side face of the clamping body is arranged on the rear side face of the top end of the transition piece 21.

The front side surface of the clamping body is provided with a left mounting hole 18 matched with the left reinforcing piece 15, a right mounting hole 19 matched with the right reinforcing piece 16 and a middle mounting hole 20 matched with the middle reinforcing piece 17.

During assembly, the left reinforcing part 15, the right reinforcing part 16 and the middle reinforcing part 17 are respectively and correspondingly arranged in a left mounting hole 18, a right mounting hole 19 and a middle mounting hole 20 of the clamping body.

Further, the left mounting hole 18, the right mounting hole 19 and the middle mounting hole 20 are through holes, and the left reinforcement 15, the right reinforcement 16 and the middle reinforcement 17 are respectively and correspondingly disposed in and completely fill the left mounting hole 18, the right mounting hole 19 and the middle mounting hole 20 of the clamping body.

In this embodiment, through the design of left reinforcement 15, right reinforcement 16, well reinforcement 17, left mounting hole 18, right mounting hole 19, well mounting hole 20, on the one hand, make the atress of anchor clamps more even, on the other hand the power that the anchor clamps bore can not transmit the slotted hole structure on the tensile testing machine again after transmitting the clamping body through the jacket, support by the tensile testing machine again (leading to the junction between jacket and the clamping body to take place to warp easily, damage), but the anchor clamps directly pass through left reinforcement 15, right reinforcement 16, well reinforcement 17, left mounting hole 18, right mounting hole 19, well mounting hole 20 directly transmits the slotted hole structure on the tensile testing machine with the power that bears, make whole chuck structure bearing capacity stronger, more firm.

Example three:

the other structures of the third embodiment are the same as those of the first embodiment, except that:

after the tested piece (or the clamped piece) is clamped, the opposite surfaces of the two notches forming the clamping area are attached to each other. During the centre gripping, one the binding face that the holder pressed from both sides the cover with another the binding face that the holder pressed from both sides the cover cooperates with the mode of protruding, concave structure, one the binding face and another of holder anchor clamps the binding face of holder anchor clamps cooperates with the mode of protruding, concave structure.

In this embodiment, when the clamping is performed, the fitting surface of one clamping piece jacket is matched with the fitting surface of the other clamping piece jacket in a convex-concave structure manner, and the fitting surface of one clamping piece fixture is matched with the fitting surface of the other clamping piece fixture in a convex-concave structure manner, so that the bearing capacity of the fitting part between the two clamping pieces is enhanced.

Example four

The other structures of the fourth embodiment are the same as those of the third embodiment, except that:

the inner side surface of the clamping body corresponding to the left bearing groove is provided with a mounting hole, a spring is arranged in the mounting hole, the outer contour of the spring is attached to the inner wall surface of the mounting hole, one end part of the spring is fixedly connected to the inner bottom surface of the mounting hole, the other end part of the spring is arranged in the left bearing groove and is fixedly connected with the rear side surface of a resisting block, and the outer contour of the resisting block is attached to the inner wall of the left bearing groove; the clamping device is characterized in that a mounting hole is formed in the inner side face of the clamping body corresponding to the right bearing groove, a spring is arranged in the mounting hole, the outer contour of the spring is attached to the inner wall face of the mounting hole, one end of the spring is fixedly connected to the inner bottom face of the mounting hole, the other end of the spring is arranged in the right bearing groove and is fixedly connected with the rear side face of the abutting block, and the outer contour of the abutting block is attached to the inner wall of the left bearing groove. The design can improve the tightness of the fit between the two mutually matched clamps.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization of those skilled in the art; when the technical solutions are contradictory or cannot be combined, the combination of the technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

Claims (7)

1. The utility model provides a tensile testing machine's chuck structure which characterized in that:

the chuck structure comprises at least one group of clamping parts,

each group of clamping parts is provided with two clamping pieces which are symmetrically matched and arranged, each clamping piece mainly comprises a clamping body, a clamping sleeve and a clamp,

the outer side surface of the lower end part of the clamping body is provided with a step structure matched with the tensile testing machine for use, the left side and the right side on the inner side surface are respectively and correspondingly provided with a jacket, the left side jacket is provided with a left bearing groove, one end part of the left bearing groove is of a blind structure, the other end part of the left bearing groove extends out of the right end surface of the left side jacket, the right side jacket is provided with a right bearing groove, one end part of the right bearing groove is of a blind structure, and the other end part of the right bearing groove extends out of the left end surface of the right side jacket,

the left end part and the right end part of the clamp are respectively and correspondingly provided with a left clamping part and a right clamping part, the left clamping part is matched with the left bearing groove, the right clamping part is matched with the right bearing groove, the center of the front side surface of the clamp is provided with a semicircular notch,

when clamping, the two clamping pieces are attached together, the notch of the clamp of one clamping piece is matched and butted with the notch of the clamp of the other clamping piece, so that the two notches are combined together to form a clamping area for clamping a component to be clamped.

2. The cartridge structure of the tensile testing machine according to claim 1, characterized in that:

the left bearing groove is in a shape like a Chinese character 'yi', an L ', a T' or a cross, and the right bearing groove is in a shape like a Chinese character 'yi', an L ', a T' or a cross.

3. The cartridge structure of the tensile testing machine according to claim 1 or 2, characterized in that:

the left bearing groove and the right bearing groove are symmetrically arranged.

4. The cartridge structure of the tensile testing machine according to claim 1, characterized in that:

the opening edge at the top end of the notch is provided with a groove or a step.

5. The cartridge structure of the tensile testing machine according to claim 1, characterized in that:

the left clamping part and the right clamping part of the clamp respectively extend towards the outer side surface of the clamping body to correspondingly form a left reinforcing part and a right reinforcing part, the upper surface of the clamp positioned at the rear part of the notch of the clamp is vertically provided with a transition part, the rear side surface of the top end of the transition part is provided with a middle reinforcing part extending towards the outer side surface of the clamping body,

the front side surface of the clamping body is provided with a left mounting hole matched with the left reinforcing piece, a right mounting hole matched with the right reinforcing piece and a middle mounting hole matched with the middle reinforcing piece,

during assembly, the left reinforcing piece, the right reinforcing piece and the middle reinforcing piece are respectively and correspondingly arranged in the left mounting hole, the right mounting hole and the middle mounting hole of the clamping body.

6. The cartridge structure of the tensile testing machine according to claim 5, wherein:

the left mounting hole, the right mounting hole and the middle mounting hole are all through holes,

the left reinforcing piece, the right reinforcing piece and the middle reinforcing piece are respectively and correspondingly arranged in and completely fill the left mounting hole, the right mounting hole and the middle mounting hole of the clamping body.

7. The cartridge structure of the tensile testing machine according to claim 1, characterized in that:

during the centre gripping, one the binding face that the holder pressed from both sides the cover with another the binding face that the holder pressed from both sides the cover cooperates with the mode of protruding, concave structure, one the binding face and another of holder anchor clamps the binding face of holder anchor clamps cooperates with the mode of protruding, concave structure.

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