A kind of sample automatic centering device for Drop-Weight Tear Test (DWTT)
Technical field
The present invention relates to a kind of sample automatic centering device, refer in particular to, while carrying out Drop-Weight Tear Test (DWTT), on the sample bearing of macro-energy impact testing machine, place after the sample that thickness is 3~40mm, sample is carried out to the device of centering.
Background technology
Drop-Weight Tear Test (DWTT) is the pilot project for the tough crisp characteristic of exosyndrome material, is mainly used in the black brittleness research of metal material.GB/T8363-2007 < < ferritic steel Drop-Weight Tear Test (DWTT) method > > regulation sample takes out on the sample bearing that packs testing machine into and interrupts rapidly from attemperator, and this process will complete in 10 seconds.At present, semi-artificial, the semi-automatic method of many employings that completes of test realizes, and takes out sample be put into conveyor by operating personnel, then by conveyor, sends into testing machine.Because artifact impact, makes whole process of the test be difficult to guarantee completed, even if test is to complete to be also difficult to judgement, test findings is produced to certain impact in 10 seconds in 10 seconds.In addition, the problem that existing automatic sample conveying device cannot solve sample centering and easily outwell at the process sample of interrupting, therefore causes testing frequent failure.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of sample automatic centering device for Drop-Weight Tear Test (DWTT), realizes sample automatic centering and guarantee that sample does not fall in process of the test, and test can be completed smoothly.
The technical scheme that the present invention addresses the above problem is as follows:
A sample automatic centering device for Drop-Weight Tear Test (DWTT), comprises testing machine body, and sample bearing and the symmetrical anvil block that is arranged on sample bearing both sides are installed on described testing machine body, it is characterized in that:
The inner side of described two anvil blocks is installed respectively bottom and is positioned at magnetic backup plate and the centering plate on sample bearing, on described anvil block, offer through hole, the affixed horizontal push-pull shaft in one end of described centering plate, described push-pull shaft is through through hole, and the other end of push-pull shaft is fixedly connected with the centering cylinder that is packed in anvil block outside.
Further, on described anvil block, milled screw is installed, described milled screw penetrates from outside to inside anvil block and is connected with magnetic backup plate.By rotation milled screw, adjust the position of magnetic backup plate, realize the adjustment to sample position on sample bearing.
As further improvement, between described centering plate and horizontal push-pull shaft, by latch, be connected.
Further, the gradient plate that is positioned at sample bearing below is installed on described testing machine body.Sample is pounded to have no progeny skids off machine center along gradient plate.
Further again, in order to prevent from damaging after process of the test sample fracture operating personnel, on described testing machine body, protective cover is installed.
The course of work of the present invention is, automatic sample conveying device is delivered to sample on sample bearing, the action of centering cylinder, push-pull shaft promotes centering plate and moves on bearing, and centering plate is shifted sample on magnetic backup plate onto, and the magnet on magnetic backup plate holds sample, then centering cylinder action, push-pull shaft retracts centering plate, and while preventing impact specimen, impulsive force is delivered to centering cylinder, and centering cylinder is damaged.Then hammer body discharges, and falling bodies destroy sample automatically, and whole process completed in 10 seconds, after sample fracture, along gradient plate, skidded off machine center.
Compared with prior art, beneficial effect of the present invention is:
1, sample automatic centering device of the present invention no longer needs artificial participation in process of the test, can guarantee that Drop-Weight Tear Test (DWTT) completed in 10 seconds, had guaranteed the accuracy of test findings.
2, the present invention is provided with magnetic backup plate, when centering cylinder, sample is shifted onto on magnetic backup plate, and sample is adsorbed on magnetic backup plate, has guaranteed that sample can not topple in test, guarantees that test completing smoothly.
Accompanying drawing explanation
Fig. 1 is structure principle chart of the present invention.
Fig. 2 is the vertical view of Fig. 1.
In figure: 1, magnetic backup plate; 2, milled screw; 3,3 ' anvil block; 4, sample bearing; 5, centering plate; 6, latch; 7, push-pull shaft; 8, centering cylinder; 9, gradient plate; 10, protective cover; 11, through hole; A, testing machine body
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail:
Shown in Fig. 1 and Fig. 2, a kind of sample automatic centering device for Drop-Weight Tear Test (DWTT), comprise testing machine body A, sample bearing 4 and the symmetrical anvil block 3,3 ' that is arranged on sample bearing arranged on left and right sides are installed on described testing machine body, wherein the installation of the anvil block 3 in left side bottom is positioned at the magnetic backup plate 1 on sample bearing, as preferably, milled screw 2 is installed on described anvil block, described milled screw penetrates from outside to inside anvil block and is connected with magnetic backup plate.By rotation milled screw, adjust the position of magnetic backup plate, realize the adjustment to sample position on sample bearing.Centering plate 5 is installed in another one anvil block 3 ' inner side, shown in the bottom of centering plate be positioned on sample bearing, on described anvil block 3 ', offer through hole 11, the affixed horizontal push-pull shaft 7 in one end of described centering plate, described push-pull shaft is through through hole 11, and the other end of push-pull shaft is fixedly connected with the centering cylinder 8 that is packed in anvil block outside.When centering cylinder moves, push-pull shaft is released centering plate or retract.
Between described centering plate and horizontal push-pull shaft, preferably by latch 6, be connected.
The gradient plate 9 that is positioned at sample bearing below is installed on described testing machine body A.In order to prevent from damaging after process of the test sample fracture operating personnel, on described testing machine body, protective cover 10 is installed.
As shown in Figure 2, two covers sample automatic centering device of the present invention can be installed on testing machine body.
The course of work of the present invention is, automatic sample conveying device is delivered to sample on sample bearing, the action of centering cylinder, push-pull shaft promotes centering plate and moves on bearing, and centering plate is shifted sample on magnetic backup plate onto, and the magnet on magnetic backup plate holds sample, then centering cylinder action, push-pull shaft retracts centering plate, and while preventing impact specimen, impulsive force is delivered to centering cylinder, and centering cylinder is damaged.Then hammer body discharges, and falling bodies destroy sample automatically, and whole process completed in 10 seconds, after sample fracture, along gradient plate, skidded off machine center.