CN202362206U - Three-point bending jig for precrack and fracture toughness test - Google Patents
Three-point bending jig for precrack and fracture toughness test Download PDFInfo
- Publication number
- CN202362206U CN202362206U CN2011204757436U CN201120475743U CN202362206U CN 202362206 U CN202362206 U CN 202362206U CN 2011204757436 U CN2011204757436 U CN 2011204757436U CN 201120475743 U CN201120475743 U CN 201120475743U CN 202362206 U CN202362206 U CN 202362206U
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- roller
- point bending
- support slipper
- test
- precrack
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- Expired - Fee Related
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Abstract
The utility model discloses a three-point bending jig for a precrack and fracture toughness test, which comprises a lower support mechanism and an upper compression mechanism, wherein the support mechanism comprises a base and a pair of support sliding blocks which can approach or be separated from each other on the base, the relative positions of the support sliding blocks are determined according to the specification of a sample when the test is performed, the compression mechanism comprises a compression bar which is connected to a power source and a compression head which is detachably installed at the lower end of the compression bar, lower support rollers and an upper support roller are respectively, detachably installed at the upper ends of the support sliding blocks and the lower end of the compression head, and a three-point bending sample is clamped between the two lower support rollers and the upper support roller during the test. All the critical components of the jig adopt a detachable installation mode to facilitate replacement for satisfying the test requirements of different three-point bending samples, so not only the test cost but also the time for changing the components are saved, and a plummet mechanism which is additionally arranged on the compression head can facilitate the centering of a sample crack part and the stressed upper support roller.
Description
Technical field
the utility model relates to a kind of three-point bending anchor clamps that are used for precrack and fracture toughness test.
Background technology
common three-point bending anchor clamps are made up of firm banking under the depression bar of band pressure head, the slide block that supports sample and the slide block.Roller on the depression bar is afterburning head, and two rollers of sample lower end edge vertical guide symmetry support sample.The integrated member of whole depression bar and pressure head, the support bar of base and bottom also are integrated components, and slide block can be adjusted the position on base.
in precrack and fracture toughness test process, adding the force, to prop up the access times of roller often limited; Under the low-temperature test condition, the fragility of base support bar increases, and limited for the cross section that cooperates MTS machine bar, it is concentrated and rupture that stress appears in the junction of support bar and base more easily.Therefore,, anchor clamps both influenced the test progress if being carried out integral replacing, and uneconomical again.
in process of the test, afterburning head must be over against the center of three-point bending sample crackle.But conventional anchor clamps all lack corresponding centering instrument.
The utility model content
The purpose of
the utility model provides a kind of a kind of three-point bending anchor clamps that are used for precrack and fracture toughness test of being convenient to change upper and lower roller with the needs that adapt to various sample.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of three-point bending anchor clamps that are used for precrack and fracture toughness test comprise the supporting mechanism of bottom and the press mechanism on top,
Described supporting mechanism comprises the support bar that is used on testing machine, installing usefulness; Be fixed on the base on described support bar top; Removably be slidingly arranged in a pair of support slipper on the described base; The perhaps opposing in opposite directions slip of a pair of described support slipper and regulate the distance between the two; The top of each described support slipper is provided with following the roller that is used to be supported on three-point bending sample below; Two described following roller along continuous straight runs are parallel to each other; And be symmetrically distributed; Each described support slipper is provided with and is used to lock it in the Lock Part on the test desired location
Described press mechanism comprises the depression bar that is connected in power source, the pressure head that is removably mounted on described depression bar lower end; The lower end of described pressure head is provided with a roller of going up that is used to be pressed on the three-point bending sample; A described upward roller and described following roller along continuous straight runs are parallel to each other
three-point bending sample holder two described following rollers and described between the roller.
preferably, on the described base, the homonymy of a pair of described support slipper extends along the glide direction of described support slipper and be provided with scale.
preferably; The upper end of each described support slipper and the lower end of described pressure head offer the cambered surface groove respectively; A described following roller or described goes up that a roller is corresponding respectively to be installed on described support slipper or the described pressure head through tandem two web joints, and a described following roller and described is gone up a roller and is housed in the corresponding cambered surface groove respectively and the axial line of the cylinder at described cambered surface groove place and a corresponding described following roller or upward prop up the axial line overlaid of roller.
preferably, described web joint is that the plate body, its two ends of oval shape is installed in described support slipper or a pressure head and a described following roller through pin respectively or goes up on the roller.
preferably; Each described support slipper comprises along the base plate of described base slip setting and the cant board that is provided with perpendicular to described base plate; Described web joint is embedded on the described cant board, is provided with the reinforcement gusset between described base plate and the described cant board.
preferably are used for described web joint is installed in the plummet that on the outer end, removably is provided with through the cotton rope drawing of giving prominence to of pin on the described pressure head.
preferably; Offer a pair of T type groove respectively from the middle part to two ends on the described base with paralleling; Be respectively arranged with two bolts that insert on each described support slipper from top to bottom; Two bolts on the corresponding same described support slipper slide along a pair of T type groove with end respectively; The nut of described Lock Part for being complementary with each described bolt respectively; These described nuts are housed in the corresponding T type groove respectively and can slide through the inwall of side, upper and lower, left and right along T type groove, regulate two described support slippers and behind the confirmed test desired position, downward each described bolt of precession and make described support slipper cooperate with screwing of bolt through described nut to be positioned on the described base.
preferably, the upper surface of described base, the both sides that are positioned at two pairs of described grooves are provided with incline, described support slipper when sliding both sides respectively along the relative inner of two described inclines.
The beneficial effect of
the utility model is: the critical component in these anchor clamps all adopts dismountable mounting means; Be convenient to change,, so both practiced thrift experimentation cost to satisfy the test needs of different three-point bending samples; Practiced thrift the time of changing parts again; Upper and lower roller adopts the high-speed steel manufacturing, makes miscellaneous part with mild carbon steel, when finishing is satisfied requirement of strength fully again after the thermal treatment; Adopt cheap mild carbon steel and demountable structure can effectively utilize anchor clamps and practice thrift manufacturing cost, additional plummet mechanism can be beneficial to the centering of a sample cracks and an afterburning roller.
Description of drawings
Accompanying drawing 3 is the schematic top plan view of the base in the three-point bending anchor clamps of the utility model;
accompanying drawing 4 is the schematic side view of the base in the three-point bending anchor clamps of the utility model.
In
accompanying drawing: 1, support bar; 2, base; 3, support slipper; 4, prop up roller down; 5, depression bar; 6, pressure head; 7, prop up roller on; 8, three-point bending sample; 9, web joint; 10, pin; 11, base plate; 12, cant board; 13, strengthen gusset; 14, scale; 15, incline; 16, plummet; 17, bolt; 18, nut.
Embodiment
Below in conjunction with embodiment shown in the drawings the utility model is done following detailed description the in detail:
are shown in accompanying drawing 1 and accompanying drawing 2; The three-point bending anchor clamps that are used for precrack and fracture toughness test of the utility model comprise: the supporting mechanism of bottom and the press mechanism on top; Supporting mechanism comprises and is used for to the support bar 1 that usefulness is installed on the testing machine, is fixed on the base 2 on support bar 1 top, removably is slidingly arranged in a pair of support slipper 3 on the base 2; The perhaps opposing in opposite directions slip of a pair of support slipper 3 and regulate the distance between the two; The top of each support slipper 3 is provided with following the roller 4 that is used to be supported on three-point bending sample 8 belows; A two following roller 4 along continuous straight runs are parallel to each other and are symmetrically distributed; Each support slipper 3 is provided with and is used to lock it in the Lock Part on the test desired location, and press mechanism comprises the depression bar 5 that is connected in power source, the pressure head 6 that is removably mounted on depression bar 5 lower ends, and the lower end of pressure head 6 is provided with a roller 7 of going up that is used to be pressed on the three-point bending sample 8; Go up a roller 7 and be parallel to each other with a following roller 4 along continuous straight runs, three-point bending sample 8 is clamped between two following rollers 4 and last the roller 7.
wherein; On the base 2, the homonymy of a pair of support slipper 3 extends along the glide direction of support slipper 3 and is provided with scale 14; The lower end of the upper end of each support slipper 3 and pressure head 6 offers the cambered surface groove respectively; Under prop up roller 4 or go up that a roller 7 is corresponding respectively to be installed on support slipper 3 or the pressure head 6 through tandem two web joints 9; Propping up roller 4 down and going up a roller 7 is housed in the corresponding cambered surface groove respectively and the axial line of the cylinder at cambered surface groove place and corresponding following roller 4 or upward prop up the axial line overlaid of roller 7; Web joint 9 10 is installed in support slipper 3 or pressure head 6 and a following roller 4 or goes up on the roller 7 through pinning respectively for the plate body of oval shape, its two ends; Each support slipper 3 comprises along the base plate 11 of base 2 slip settings and the cant board 12 that is provided with perpendicular to base plate 11; Web joint 9 is embedded on the cant board 12, is provided with between base plate 11 and the cant board 12 to strengthen gusset 13, is used for web joint 9 is installed in the plummet 16 that on the outer end, removably is provided with through the cotton rope drawing of giving prominence to of pin 10 on the pressure head 6; Shown in accompanying drawing 3 and accompanying drawing 4; Offer a pair of T type groove respectively from the middle part to two ends on the base 2 with paralleling, be respectively arranged with two bolts 17 that insert on each support slipper 3 from top to bottom, two bolts 17 on the corresponding same support slipper 3 slide along a pair of T type groove with end respectively; The nut 18 of Lock Part for being complementary with each bolt 17 respectively; These nuts 18 are housed in the corresponding T type groove respectively and can slide through the inwall of side, upper and lower, left and right along T type groove, regulate two support slippers 3 and behind the confirmed test desired position, downward each bolt 17 of precession and make support slipper 3 cooperate with screwing of bolt 17 through nut 18 to be positioned on the base 2; The upper surface of base 2, the both sides that are positioned at two pairs of grooves are provided with incline 15, support slipper 3 when sliding both sides respectively along the relative inner of two inclines 15.
Before
test, the member that can assemble different size as required is to accomplish anchor clamps shown in Figure 1.After being installed in anchor clamps on the testing machine, the three-point bending sample is placed on the roller by standard-required, the both sides, front and back adopt the plummet 16 of cotton rope drawing to carry out centering, after finishing cotton rope and plummet 16 are taken off and accomplish test and get final product.
Critical component in the anchor clamps of
the utility model all adopts dismountable mounting means; Be convenient to change,, so both practiced thrift experimentation cost to satisfy the test needs of different three-point bending samples 8; Practiced thrift the time of changing parts again; Upper and lower roller 4 adopts the high-speed steel manufacturing, makes miscellaneous part with mild carbon steel, when finishing is satisfied requirement of strength fully again after the thermal treatment; Adopt cheap mild carbon steel and demountable structure can effectively utilize anchor clamps and practice thrift manufacturing cost, additional plummet 16 mechanisms can be beneficial to the centering of a sample cracks and an afterburning roller.
the foregoing description is only for explaining the technical conceive and the characteristics of the utility model; Its purpose is to let the personage who is familiar with this technology can understand content of the utility model and enforcement according to this, can not limit the protection domain of the utility model with this.All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection domain of the utility model.
Claims (8)
1. three-point bending anchor clamps that are used for the test of precrack and fracture toughness is characterized in that: comprise the supporting mechanism of bottom and the press mechanism on top,
Described supporting mechanism comprises the support bar that is used on testing machine, installing usefulness; Be fixed on the base on described support bar top; Removably be slidingly arranged in a pair of support slipper on the described base; The perhaps opposing in opposite directions slip of a pair of described support slipper and regulate the distance between the two; The top of each described support slipper is provided with following the roller that is used to be supported on three-point bending sample below; Two described following roller along continuous straight runs are parallel to each other; And be symmetrically distributed; Each described support slipper is provided with and is used to lock it in the Lock Part on the test desired location
Described press mechanism comprises the depression bar that is connected in power source, the pressure head that is removably mounted on described depression bar lower end; The lower end of described pressure head is provided with a roller of going up that is used to be pressed on the three-point bending sample; A described upward roller and described following roller along continuous straight runs are parallel to each other
The three-point bending sample holder two described following rollers and described between the roller.
2. a kind of three-point bending anchor clamps that are used for the test of precrack and fracture toughness according to claim 1 is characterized in that: on the described base, the homonymy of a pair of described support slipper extends along the glide direction of described support slipper and be provided with scale.
3. a kind of three-point bending anchor clamps that are used for precrack and fracture toughness test according to claim 1; It is characterized in that: the upper end of each described support slipper and the lower end of described pressure head offer the cambered surface groove respectively; A described following roller or described goes up that a roller is corresponding respectively to be installed on described support slipper or the described pressure head through tandem two web joints, and a described following roller and described is gone up a roller and is housed in the corresponding cambered surface groove respectively and the axial line of the cylinder at described cambered surface groove place and a corresponding described following roller or upward prop up the axial line overlaid of roller.
4. a kind of three-point bending anchor clamps that are used for precrack and fracture toughness test according to claim 3 is characterized in that: described web joint is that plate body, its two ends of oval shape are installed on described support slipper or pressure head and a described following roller or the last roller through pin respectively.
5. a kind of three-point bending anchor clamps that are used for precrack and fracture toughness test according to claim 3; It is characterized in that: each described support slipper comprises along the base plate of described base slip setting and the cant board that is provided with perpendicular to described base plate; Described web joint is embedded on the described cant board, is provided with the reinforcement gusset between described base plate and the described cant board.
6. a kind of three-point bending anchor clamps that are used for the test of precrack and fracture toughness according to claim 3 is characterized in that: the plummet that on the outer end, removably is provided with through the cotton rope drawing of giving prominence to that is used for described web joint is installed in pin on the described pressure head.
7. according to any described a kind of three-point bending anchor clamps that are used for precrack and fracture toughness test in the claim 1 to 6; It is characterized in that: offer a pair of T type groove respectively from the middle part to two ends on the described base with paralleling; Be respectively arranged with two bolts that insert on each described support slipper from top to bottom; Two bolts on the corresponding same described support slipper slide along a pair of T type groove with end respectively; The nut of described Lock Part for being complementary with each described bolt respectively; These described nuts are housed in the corresponding T type groove respectively and can slide through the inwall of side, upper and lower, left and right along T type groove; Regulate two described support slippers and behind the confirmed test desired position, downwards each described bolt of precession and make described support slipper cooperate with screwing of bolt to be positioned on the described base through described nut.
8. a kind of three-point bending anchor clamps that are used for precrack and fracture toughness test of stating according to claim 7; It is characterized in that: the upper surface of described base, the both sides that are positioned at two pairs of described grooves are provided with incline, described support slipper when sliding both sides respectively along the relative inner of two described inclines.
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CN2011204757436U CN202362206U (en) | 2011-11-25 | 2011-11-25 | Three-point bending jig for precrack and fracture toughness test |
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CN2011204757436U CN202362206U (en) | 2011-11-25 | 2011-11-25 | Three-point bending jig for precrack and fracture toughness test |
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CN2011204757436U Expired - Fee Related CN202362206U (en) | 2011-11-25 | 2011-11-25 | Three-point bending jig for precrack and fracture toughness test |
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CN103196759A (en) * | 2013-03-06 | 2013-07-10 | 中国科学院地质与地球物理研究所 | Detection apparatus and detection method of displacement of force application point used for testing rock fracture toughness |
CN103323297A (en) * | 2013-03-18 | 2013-09-25 | 上海振华重工(集团)股份有限公司 | Fatigue crack prefabricating method for fracture sample of high-strength steel welding joint |
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