CN201464286U

CN201464286U - Second hit preventing device of drop hammer impact testing machine

Info

Publication number: CN201464286U
Application number: CN2009200777503U
Authority: CN
Inventors: 钱进军
Original assignee: HUALONG DETECTOR CO Ltd SHANGHAI
Current assignee: Shanghai Hualong Test Instruments Co., Ltd.
Priority date: 2009-06-30
Filing date: 2009-06-30
Publication date: 2010-05-12
Anticipated expiration: 2019-06-30

Abstract

The utility model relates to a device of a drop hammer impact testing machine, which belongs to the field of experimental facilities. A second hit preventing device of a drop hammer impact testing machine comprises a support, a drop hammer guide rail (2) on the support, and a drop hammer (3). The utility model is characterized in that the support is provided with a drop hammer drop blocking mechanism (4), the vertical height of the drop hammer drop blocking mechanism (4) is larger than the height of a sample (1) arranged on the horizontal plane of the support, the drop hammer drop blocking mechanism (4) comprises a control unit (41) and a horizontally moving unit (42), the horizontally moving unit (42) is driven by the control unit (41) to reciprocate along the horizontal plane under the drop hammer (3), one end is moved into the mapped range of the drop hammer (3) on the horizontal plane, and the other end is moved outside the mapped range of the drop hammer (3) on the horizontal plane. When the drop hammer rebounds after impacting the sample, the second hit preventing device quickly extends to the lower side of the drop hammer so as to block the second hit of the drop hammer on the sample, and the accuracy of the test result is ensured.

Description

A kind of drop hammer impact testing machine is prevented the two-hit device

Technical field

The utility model relates to a kind of device of drop hammer impact testing machine, relates in particular to be used for falling weight impact test and to prevent that sample is by the device of two-hit.

Background technology

When traditional drop hammer impact testing machine was done experiment, normally dropping hammer discharged from a certain test setting height, and along guide rod freely falling body normal of impact sample, test sample is obtained the data that need then.Because the material difference of sample, the difference of test method, drop hammer impact testing machine also is divided into multiple now.When these drop hammer impact testing machines in falling weight impact test, drop hammer fall hit sample after because it is different with the material of the collision of sample and sample to drop hammer, form two-hit even three strike samples after the bounce-back that can produce certain altitude of dropping hammer sometimes.

For example sample is a metal material, requirement according to the nil-ductility temperature drop-weight test method of GB6803-86 ferritic steel, present drop hammer impact testing machine mainly comprises bearing, guide rail and dropping hammer and composition such as hoisting gear drops hammer, sample lies in a horizontal plane in and drops hammer down, the freely falling body impact specimen surface of dropping hammer, viewing test result after impact is finished, by adjusting chilling temperature, repeatedly impulse ratio draws the nil-ductility temperature of trial target than test findings.Fall the surface of first strike sample when dropping hammer after, because collision and sample are needed as displacement up and down can not be arranged, fall the formation two-hit once more even repeatedly hit sample after will making the bounce-back that produces certain altitude of dropping hammer, the observations that sample is impacted not is very accurate like this, along with the accuracy requirement of falling weight impact test improves constantly, repeatedly the influence of Chong Jiing more and more can not be out in the cold.

Summary of the invention

Technical problem to be solved in the utility model provides the anti-two-hit device of a kind of drop hammer impact testing machine, falls the back bounce-back and falls the secondary that sample is formed again or repeatedly hit the defective that influences the test figure precision thereby solve to drop hammer in the prior art.

The technical solution of the utility model is as follows:

A kind of drop hammer impact testing machine is prevented the two-hit device, comprise bearing, the guide rail 2 and drop hammer 3 of dropping hammer on the bearing, it is characterized in that: whereabouts blocking mechanism 4 drops hammer on bearing, described vertical height of dropping hammer whereabouts blocking mechanism 4 is higher than sample 1 height that is placed on the bearing surface level, the described whereabouts blocking mechanism 4 that drops hammer comprises control module 41 and transverse movement unit 42, described transverse movement unit 42 drives drop hammer surface level to-and-fro movement under 3 of lower edges at control module 41, move an end to dropping hammer 3 in the mapping scope of this surface level, and the motion other end is to dropping hammer 3 outside the mapping scope of this surface level.

The described whereabouts blocking mechanism 4 that drops hammer has a plurality of.

Described transverse movement unit 42 is the metal slide block, and described control module 41 comprises electromagnet 411 and connecting rod 412, and described connecting rod 412 connects electromagnet 411 and metal slide block, and the metal slide block is positioned at slide block guide rail 413.

Described electromagnet 411 is a direct drive type electro magnet, and described connecting rod 412 is for there being the lever of fulcrum, and lever one end connects the metal slide block, and the other end connects electromagnet 411.

Described lever is divided into two parts by fulcrum, also is connected with lever in the part that connects electromagnet 411 and replys auxiliary spring 414.

Beneficial effect

The utility model has increased the whereabouts blocking mechanism that drops hammer on existing testing machine, when rebounding behind the drop impact sample that drops hammer, can stretch out fast and stop the strike again of dropping hammer to sample, guaranteed sample to be tested test result accurately.

Description of drawings

Fig. 1 is the synoptic diagram that has drop hammer impact testing machine of the present utility model.

Fig. 2 is a front view of the present utility model.

Fig. 3 is a vertical view of the present utility model.

Embodiment

A kind of drop hammer impact testing machine is prevented the two-hit device, comprise bearing, the guide rail 2 and drop hammer 3 of dropping hammer on the bearing, whereabouts blocking mechanism 4 drops hammer on bearing, as shown in Figure 1, described vertical height of dropping hammer whereabouts blocking mechanism 4 is higher than sample 1 height that is placed on the bearing surface level, the described whereabouts blocking mechanism 4 that drops hammer comprises control module 41 and transverse movement unit 42, described transverse movement unit 42 drives drop hammer surface level to-and-fro movement under 3 of lower edges at control module 41, move an end to dropping hammer 3 in the mapping scope of this surface level, and the motion other end is to dropping hammer 3 outside the mapping scope of this surface level.

The described whereabouts blocking mechanism 4 that drops hammer is arranged on the support parallel with the guide rail 2 of dropping hammer on the bearing, and can be symmetrical set, and also can be provided with a plurality of.

Transverse movement unit 42 is the metal slide block, and described control module 41 comprises electromagnet 411 and connecting rod 412, and described connecting rod 412 connects electromagnet 411 and metal slide block, and the metal slide block is positioned at slide block guide rail 413.Electromagnet 411 uses direct drive type electro magnet, if directly link to each other, then electromagnet 411 is identical with the direction of motion of metal slide block; If described connecting rod 412 is for there being the lever of fulcrum, lever one end connects the metal slide block, and the other end connects electromagnet 411, and then the direction of motion of electromagnet 411 and metal slide block is opposite.Described lever is divided into two parts by fulcrum, also is connected with lever in the part that connects electromagnet 411 and replys auxiliary spring 414.Shown in accompanying drawing 2 and accompanying drawing 3, among the figure: electromagnet 411 is plug-type, after the energising of outer ring, plug will eject, connecting rod 412 adopts the lever that fulcrum is arranged, one end of lever uses the iron pin to be connected with plug, because the effect of lever, the part that the other end is connected with slide block promotes slide block round about, slide block is stretched out forward, represent lever when lever is parallel lines in the accompanying drawing 3, the initial position of slide block and electromagnet 411 plugs is represented electromagnet 411 energising back levers when lever is oblique line, the movement position of slide block and electromagnet 411 plugs, slide block stretches out slide block guide rail 413, stop to fall once more drop hammer 3, because the outage of electromagnet 411, the retraction of plug and lever are replied the i.e. elastic force that is fixed on the extension spring on the slide block guide rail 413 among the figure of auxiliary spring 414, make slide block be returned to initial position.

The energising of above electromagnet 411 is directly controlled by control system opportunity, receives the signal that drops hammer and at photoelectric sensor, and control system is automatically according to the described whereabouts blocking mechanism 4 that drops hammer of signal enabling of delaying time.Adopt the operation of whole device of control system as follows: when drop hammer 3 from the test setting height by the releasing order of control system, along the guide rail 2 freely falling body normal of impact samples 1 that drop hammer; Moment after the bounce-back that produces certain altitude behind the surface of the 3 strike samples 1 that drop hammer, the action immediately after the electromagnet 411 controlled systems control energising in the whereabouts blocking mechanism 4 of dropping hammer, plug, lever, slide block move simultaneously, slide block is inserted 3 lower ends of dropping hammer, hold and drop hammer 3, do not make and hit sample 1 under its secondary falling, this process is finished in moment automatically by control system; When sample 1 finish once hit after, electric control system will be dropped hammer and 3 is promoted to setting height and stop, whereabouts blocking mechanism 4 outages of dropping hammer this moment make slide block be retracted into initial position under the elastic force of extension spring.Repeat above-mentioned steps then and proceed test.

The support at whereabouts blocking mechanism 4 places of dropping hammer can be done the adjusting of certain altitude up and down, as separated into two parts, and the height set bolt is arranged; Perhaps following of support has spiral, rotatable about.Can tackle the sample of differing heights like this.

Claims

1. a drop hammer impact testing machine is prevented the two-hit device, comprise bearing, the guide rail that drops hammer (2) on the bearing and drop hammer (3), it is characterized in that: whereabouts blocking mechanism (4) drops hammer on bearing, described vertical height of dropping hammer whereabouts blocking mechanism (4) is higher than the sample (1) that is placed on the bearing surface level highly, the described whereabouts blocking mechanism (4) that drops hammer comprises control module (41) and transverse movement unit (42), surface level to-and-fro movement under described transverse movement unit (42) drops hammer (3) in control module (41) driving lower edge, move an end to dropping hammer (3) in the mapping scope of this surface level, and the motion other end is to dropping hammer (3) outside the mapping scope of this surface level.

2. drop hammer impact testing machine as claimed in claim 1 is prevented the two-hit device, it is characterized in that: the described whereabouts blocking mechanism (4) that drops hammer has a plurality of.

3. drop hammer impact testing machine as claimed in claim 1 is prevented the two-hit device, it is characterized in that: described transverse movement unit (42) is the metal slide block, described control module (41) comprises electromagnet (411) and connecting rod (412), described connecting rod (412) connects electromagnet (411) and metal slide block, and the metal slide block is positioned at slide block guide rail (413).

4. drop hammer impact testing machine as claimed in claim 3 is prevented the two-hit device, it is characterized in that: described electromagnet (411) is a direct drive type electro magnet, described connecting rod (412) is for there being the lever of fulcrum, and lever one end connects the metal slide block, and the other end connects electromagnet (411).

5. drop hammer impact testing machine as claimed in claim 4 is prevented the two-hit device, and it is characterized in that: described lever is divided into two parts by fulcrum, also is connected with lever in the part that connects electromagnet (411) and replys auxiliary spring (414).