CN202177546U

CN202177546U - Stretching clamp

Info

Publication number: CN202177546U
Application number: CN2011202528042U
Authority: CN
Inventors: 方健; 周冶东; 丁富连; 张华明
Original assignee: Baoshan Iron and Steel Co Ltd
Current assignee: Baoshan Iron and Steel Co Ltd
Priority date: 2011-07-18
Filing date: 2011-07-18
Publication date: 2012-03-28
Anticipated expiration: 2021-07-18

Abstract

The utility model discloses a stretching clamp, which comprises a clamp body and a pair of wedge-shaped tooth blocks. The clamp body comprises a pair of clamping arms, guide chutes are respectively arranged on the clamping arms, and the pair of wedge-shaped tooth blocks can respectively slide relative to the pair of guide chutes. Pins and pin holes matched with each other are respectively arranged on the pair of wedge-shaped tooth blocks. By adopting the stretching clamp, samples can be reliably clamped and positioned.

Description

A kind of stretching clamp

Technical field

The utility model relates to a kind of material tensile test and uses anchor clamps, the stretching clamp when cryogenic tensile was tested during other advanced high strength steel plate material of particularly a kind of higher intensity level was implemented.

Background technology

For satisfying the functional requirement of passenger car " loss of weight " and " safety ", be the first-selected structure material that the advanced high strength steel plate AHSS of representative has become ultralight dimension structure vehicle body design with dual phase steel and transformation induced plasticity steel.Consider the particular job temperature and the environmental baseline of vehicle different parts, generally speaking to the AHSS steel grade implement-40 ℃, 0 ℃ with 100 ℃ of temperature conditions under tension test be the conventional means of its usability evaluation.On the other hand; Because complex phase constitutes or phase-change induced plastic is that the AHSS steel grade can obtain the excellent leading mechanism of outfit of moulding by force at thin rolling specs; Possess effective environmental and load phase transition temperature and the thermal stability thereof that means will help to assess steel grade, and then resolve the process of quickening research and development through performance.Particularly,, set up the uniaxial tensile test system under the low temperature environment temperature conditions in the cover, become steel enterprise and the common concern of car enterprise in automobile loss of weight innovation in industry to high-strength AHSS steel plate sample.

The research object of tension test is the fixing deformational behavior of gauge length under loading, so the stationarity of loading transfer, the one-way that loads axis to neutrality and gauge length distortion be obtain the strong plasticity of material can prerequisite and assurance.Wherein, the interaction of anchor clamps and sample is that load is effectively transmitted and the key of measuring.

Patent CN1619286A discloses a kind of stretching clamp that is used for the nonmetallic materials stretching mechanical property testing; It is offered on anchor clamps and the consistent recessed caulking groove of rectangle sheet coupon head shoulder (transition arcs) geomery in advance, can sample two ends shoulder integral body be built in the groove position of lower clamp.During tension test, contact through cell wall and sample shoulder coupling and to apply axial load.Adopt this device to need the machining precision of sample is proposed high requirement, and the rectangular specimen correspondence of specific shoulder size independently a cover load anchor clamps.Because the contact of bilateral shoulder loads, the sample transition arcs will directly not cause loading departing from of axis as if not satisfying symmetry, and then influence the effective tracking and the measurement of gauge length distortion.Adopt mode that this device can adopt punching press usually to mild steel or nonmetallic materials sample preparation guaranteeing machining precision, and AHSS steel grade intensity rank is high, common punching press can't be applied to advanced high-strength steel.

The utility model content

The purpose of the utility model is to provide a kind of stretching clamp, can keep the reliable clamping of sample.

For realizing above-mentioned purpose; The stretching clamp of the utility model; Comprise chuck body and a pair of chisel teeth piece, said chuck body comprises a pair of jig arm, is respectively equipped with the guiding skewed slot on the said jig arm; Said a pair of chisel teeth piece can be distinguished said relatively a pair of guiding skewed slot and slide, and is respectively arranged with latch and the pin-and-hole that cooperatively interacts on the said a pair of chisel teeth piece.

The clamping face of said chisel teeth piece is provided with lines.

The stretching clamp of the utility model, the chisel teeth piece can provide reliable holding force in drawing process, and latch and pin-and-hole play when locating with stretch-loaded when sample is installed provides tension to remedy the hypodynamic double action of clamping.Adopt the stretching clamp of the utility model, can sample clamped reliably and locate, can be widely used in the middle cryogenic tensile test of high strength steel plate.

Description of drawings

Fig. 1 is the synoptic diagram of the stretching clamp of the utility model;

Fig. 2 is assemblied in the synoptic diagram on the testing machine for the stretching clamp of the utility model;

Fig. 3 is that the A-A of Fig. 2 is to cut-open view.

Embodiment

Fig. 1 is the synoptic diagram of the stretching clamp of the utility model; As shown in the figure; The stretching clamp of the utility model comprises chuck body 10 and a pair of

chisel teeth piece

21,22, and said chuck body 10 comprises a pair of

jig arm

11,12, is respectively equipped with guiding skewed slot 110,120 on the said

jig arm

11,12; Said

chisel teeth piece

21,22 can be distinguished said relatively guiding skewed slot 110,120 and slide, and is respectively arranged with latch 31 and the pin-and-hole 32 that cooperatively interacts on the said a pair of

chisel teeth piece

21,22.

Said a pair of

chisel teeth piece

21,22 symmetries are installed on a pair of

jig arm

11,12, and the end face of said

chisel teeth piece

21,22 clamping samples is that clamping face is parallel.

Fig. 2 is assemblied in the synoptic diagram on the testing machine for the stretching clamp of the utility model, and as shown in the figure, the stretching clamp that is assemblied in the utility model on the testing machine is two, respectively the two ends of clamping sample 7.Two

extension rods

3,4 were connected with portable beam 6 with the fixed beam 5 of cupping machine respectively about chuck body 10 was passed through, and the stretching clamp of sample 7 and the utility model places environmental cabinet 5.During the stretching clamp clamping sample 7 of the utility model, a pair of

chisel teeth piece

21,22 clamps samples 7 in advance, and latch 31 inserts pin-and-hole 32 after passing the hole of offering in advance on the sample 7 simultaneously.When portable beam 2 moved down tensile sample 7, said

chisel teeth piece

21,22 moved relative to said guiding skewed slot 110,120 respectively, and holding force is increased, thereby clamped sample 7.Latch 31 can be avoided sample 7 relative

chisel teeth pieces

21,22 slips in drawing process.

Fig. 3 be the A-A of Fig. 2 to cut-open view, as shown in the figure, the clamping face of

chisel teeth piece

21,22 is provided with lines, the friction force when increasing

chisel teeth piece

21,22 clamping samples 7.

The interaction of

chisel teeth piece

21,22 and sample 7 can be played conventional wedge clamping and the dual mode that draws pin to load simultaneously.When sample 7 clamping face states are suitable; Lines on sample 7 clamping faces provides steadily static friction holding force reliably through wedge shape power clamping sample 7; And when sample 7 skids tendency owing to the surface quality of clamping face; Latch 31 can provide effective tensile load simultaneously with cooperating of 32 of pin-and-holes, is fixed in the anchor clamps and is not shifted to guarantee sample 7.Also can play the effect of location when on the other hand, latch 31 is installed sample 7 before on-test.

Claims

1. stretching clamp; It is characterized in that; Comprise chuck body (10) and a pair of chisel teeth piece (21,22), said chuck body (10) comprises a pair of jig arm (11,12), is respectively equipped with guiding skewed slot (110,120) on the said jig arm (11,12); Said a pair of chisel teeth piece (21,22) can be distinguished said relatively a pair of guiding skewed slot (110,120) and slide, and is respectively arranged with the latch (31) and the pin-and-hole (32) that cooperatively interact on the said a pair of chisel teeth piece (21,22).

2. stretching clamp as claimed in claim 1 is characterized in that, the clamping face of said chisel teeth piece (21,22) is provided with lines.