CN105890990A - Tensile clamp for self-lubricating wedge jaw testing machine - Google Patents
Tensile clamp for self-lubricating wedge jaw testing machine Download PDFInfo
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- CN105890990A CN105890990A CN201610216052.1A CN201610216052A CN105890990A CN 105890990 A CN105890990 A CN 105890990A CN 201610216052 A CN201610216052 A CN 201610216052A CN 105890990 A CN105890990 A CN 105890990A
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- slide block
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- General Physics & Mathematics (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a tensile clamp for a self-lubricating wedge jaw testing machine. A clamping base is provided with a U-shaped cavity with a narrow opening and a wider bottom. A clamping block is connected with one side face of a sliding block. The other side face of the sliding block corresponds to the side wall face of the U-shaped cavity of the clamping base. The side face, matched with the side wall face of the U-shaped cavity of the clamping base, of the sliding block is coated with a wear-resistant material or provided with a friction plate in an embedded mode, and a pair of sliding friction faces are formed. The friction faces do not need to be lubricated by an oil film, friction force between the sliding block and the clamping base can be lowered, the servo performance of the sliding block can be greatly improved, eccentricity of a jaw during a tensile test is overcome, a working face of the clamping base is protected forcefully, and scratches of the friction faces of the clamping base are eliminated; the phenomenon that a test curve fluctuates due to the fact the a clamp is clamped is avoided, the experimental data accuracy can be improved, the service life of the clamp can be prolonged, and the tensile clamp can work for a long time on the oil-free lubrication condition. After the clamp is used for a long time, only the friction plate needs to be replaced, and the sliding block or the clamping base does not need to be replaced.
Description
Technical field
The present invention relates to a kind of testing machine fixture, be specifically related to a kind of tensile clamp of wedge-shaped jaw testing machine, belong to testing machine technical field.
Background technology
In metal material stretching test, major part testing machine uses wedge shape clamping jaw, it is typically made up of the grip slipper of wedge shape, hydraulic cylinder, jaw baffle plate, slide block, power drive plate and grip block etc., structure is symmetrical form, grip slipper has the cavity taken the shape of the letter U that oral area is narrower, bottom is wider, grip block is connected on slide block by dovetail, jaw is formed between two grip blocks, having a sliding friction surface between the side wall surface of slide block and U-shaped cavity, slide block can slide in the space being made up of side wall surface and the jaw baffle plate of U-shaped cavity；The piston rod of hydraulic cylinder is passed by the bottom of U-shaped cavity and is connected with power drive plate.
Its work process is, during tension test, the piston rod of hydraulic cylinder rises, propulsion power drive plate move up, power drive plate then promote grip block together with slide block upwards, owing to grip slipper is wedge shape, open top is little, during then two grip blocks move upward, produce moving horizontally in opposite directions the most simultaneously, produce the effect of clamping, increase along with test pulling force, the clamping force of sample is also increased by grip block, so that sample is locked automatically, will not be pulled out.
Its slide block inclined-plane of the stretching clamp of said structure directly slides on the surface of grip slipper U-shaped cavity side wall, slip between the planar kinematic pair of the side wall surface composition of slide block and U-shaped cavity produces strength extrusion friction, need coating lubricating oil, due to along with moving schedule, normal pressure can increase, now under the pressure that this intensity is higher, the most reciprocal, lubricating oil film between rubbing surface is the most destroyed, lubricating oil even can be made to exhaust, make to slide between the side wall surface of slide block and U-shaped cavity the most smooth, coefficient of friction increases, slide block produces and creeps, therefore, need repeatedly to dismantle be continuously replenished lubrication by, frequency of maintenance is high；Along with the increase of access times, coefficient of friction can be increasing, and when excessive friction also results in slide block sliding, grip slipper U-shaped cavity side wall or slider wear soon and are easy to scratch occur, the phenomenon such as clamping stagnation, excesssive gap occurs, life-span reduces, and repairs trouble, and maintenance cost is high.Big additionally, due to frictional force, slide block trackability is poor, and two side slides move asynchronous or creep, and necessarily causes jaw axiality to change, causes result of the test error occur.The situation of fixture clamping stagnation the most even occurs, thus causes trial curve that fluctuation occurs, affect the software judgement to sample yield point, cause test data inaccurate.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of improve sliding capability, reduce abrasion, the self-lubricating tensile clamp of wedge-shaped jaw testing machine that increases the service life.
The present invention be the technical scheme is that for achieving the above object
A kind of self-lubricating tensile clamp of wedge-shaped jaw testing machine, including grip slipper, hydraulic cylinder, jaw baffle plate, slide block, power drive plate and grip block, grip slipper has the cavity taken the shape of the letter U that oral area is narrower, bottom is wider, grip block is connected with a side of slide block, forming jaw between two grip blocks, another side of slide block is corresponding with the side wall surface of grip slipper U-shaped cavity；The piston rod of hydraulic cylinder is passed by the bottom of U-shaped cavity and is connected with power drive plate, it is characterized in that: another side of described slide block matches and the sliding friction surface that partners with the side wall surface of grip slipper U-shaped cavity, and slide block can slide in the space being made up of side wall surface and the jaw baffle plate of U-shaped cavity；It is coated with high-abrasive material on the side that the side wall surface of described slide block and grip slipper U-shaped cavity matches.
In order to the motion of slide block is guided, side corresponding with jaw baffle plate on described slide block is provided with gathering sill, and jaw baffle plate is correspondingly provided with gib block, and gathering sill is corresponding to the width of gib block, the degree of depth of gathering sill is more than the height of gib block, and gib block can slide in gathering sill；It is coated with high-abrasive material on the sliding surface contacted with gib block on side corresponding with jaw baffle plate on slide block, on gathering sill.
Further, described high-abrasive material is Teflon.
Further, described high-abrasive material is molybdenum bisuphide.
A kind of self-lubricating tensile clamp of wedge-shaped jaw testing machine, including grip slipper, hydraulic cylinder, jaw baffle plate, slide block, power drive plate, grip block, grip slipper has the cavity taken the shape of the letter U that oral area is narrower, bottom is wider, grip block is connected with a side of slide block, forming jaw between two grip blocks, another side of slide block is corresponding with the side wall surface of grip slipper U-shaped cavity；The piston rod of hydraulic cylinder is passed by the bottom of U-shaped cavity and is connected with power drive plate, it is characterized in that: on the side that described slide block is corresponding with the side wall surface of grip slipper U-shaped cavity, be inlaid with friction plate, the lateral surface of described friction plate matches and the sliding friction surface that partners with the side wall surface of grip slipper U-shaped cavity, and slide block can slide in the space being made up of side wall surface and the jaw baffle plate of U-shaped cavity.
Further, the described slide block side corresponding with the side wall surface of grip slipper U-shaped cavity is provided with locating slot, and described friction plate is arranged in locating slot.
Further, the thickness of described friction plate is more than the degree of depth of locating slot so that friction plate protrudes from slide block the side that the side wall surface with grip slipper U-shaped cavity matches；The width of described friction plate is more than the width of slide block side, making jaw baffle plate only contact with friction board and not contact with slide block, so, the face of sliding friction is all on the friction plate inlayed, improve original friction, sliding properties, lifting clamp performance and used life；The height of described friction plate is suitable with the height of locating slot, and friction plate is bolted in the locating slot of slide block.
In order to the motion of slide block is guided, side corresponding with jaw baffle plate on described slide block is provided with gathering sill, and jaw baffle plate is correspondingly provided with gib block, and gathering sill is corresponding to the width of gib block, the degree of depth of gathering sill is more than the height of gib block, and gib block can slide in gathering sill.
Described friction plate can be tin bronze plate.
Described friction plate can also be spheroidal graphite cast-iron plate.
Described friction plate can also be powder metallurgy plate.
The present invention has the advantages that compared to prior art
1, breach sliding friction between rubbing surface and rely on conventional method and the limitation of film lubrication, use the mode coating high-abrasive material on the rubbing surface of slide block, the frictional force between slide block and grip slipper can be reduced, coating is not limited by base material, has that chemical stability is strong, bear the characteristics such as high pressure, oil resistant, coefficient of friction is little, wearability is good；The trackability of slide block can be greatly increased, the bias of jaw when overcoming tension test, the most effectively protection grip slipper work surface, and eliminate grip slipper rubbing surface scratch；
2, the mode of friction board is inlayed in employing on the rubbing surface of slide block, slide block is not directly contacted with grip slipper, friction board uses tin bronze plate, spheroidal graphite cast-iron plate or powder metallurgy plate, it is respectively provided with good wear-resisting, self-lubricating property, the frictional force between slide block and friction plate can be reduced, will not bite between rubbing surface, it is to avoid owing to fixture occurs that locking phenomenon causes trial curve fluctuation occur, improve the accuracy of experimental data；And work efficiency can be improved, extend fixture service life, when being particularly suitable for testing machine stretching clamping, by strength extruding sliding friction between slide block and friction board, special operation condition, heavy duty that oil film is destroyed move back and forth the occasion that oil film is difficult to be formed, and can work under the conditions of oil-free lubrication for a long time；The most replaceable tin bronze plate, spheroidal graphite cast-iron plate or powder metallurgy plate simultaneously, without changing slide block or grip slipper, decreases waste of material.
Accompanying drawing explanation
Fig. 1 is the axonometric drawing of the embodiment of the present invention one.
Fig. 2 is the schematic front view of the embodiment of the present invention one.
Fig. 3 is the schematic diagram of the slide block in the embodiment of the present invention one.
Fig. 4 is the A-A cross-sectional schematic in Fig. 3.
Fig. 5 is the axonometric drawing of the embodiment of the present invention three.
Fig. 6 is the schematic front view of the embodiment of the present invention three.
Fig. 7 is the schematic diagram of the slide block in the embodiment of the present invention three.
Fig. 8 is the B-B cross-sectional schematic in Fig. 7.
In figure: 1-grip slipper, 2-jaw baffle plate, 3-slide block, 4-hydraulic cylinder, 5-power drive plate, 6-grip block, 7-high-abrasive material, 8-gathering sill, 9-gib block, 10-friction plate.
Detailed description of the invention
For the technical characterstic of this programme can be clearly described, below by detailed description of the invention, and combining accompanying drawing, the present invention is described further.
Embodiment one:
Referring to figs. 1 to Fig. 4, a kind of self-lubricating tensile clamp of wedge-shaped jaw testing machine, including grip slipper 1, hydraulic cylinder 4, jaw baffle plate 2, slide block 3, power drive plate 5 and grip block 6, grip slipper 1 is integral type structure with moved cross beam or the entablature of testing machine, it is narrower that grip slipper 1 has oral area, the cavity taken the shape of the letter U that bottom is wider, grip block 6 is connected with a side of slide block 3, jaw is formed between two grip blocks 6, another side of slide block 3 matches with the side wall surface of the U-shaped cavity of grip slipper 1, and the sliding friction surface that partners, slide block 3 can slide in the space being made up of side wall surface and the jaw baffle plate 2 of U-shaped cavity；The piston rod of hydraulic cylinder 4 is passed by the bottom of U-shaped cavity and is connected with power drive plate 5；It is coated with high-abrasive material on the side that the side wall surface of the U-shaped cavity of described slide block 3 and grip slipper 1 matches.Side corresponding with jaw baffle plate 2 on slide block 3 is provided with gathering sill 8, and jaw baffle plate 2 is correspondingly provided with gib block 9, and gathering sill 8 is corresponding to the width of gib block 9, and the degree of depth of gathering sill 8 is more than the height of gib block 9, and gib block 9 can slide in gathering sill 8；It is coated with high-abrasive material on the sliding surface contacted with gib block 9 on side corresponding with jaw baffle plate 2 on slide block 3, on gathering sill 8.The high-abrasive material of the present embodiment is Teflon.Slide block, through techniques such as high temperature defat, surface preparation, spraying, hot setting, cooling and later stage process, completes the spraying of Teflon.
Embodiment two:
Referring to figs. 1 to Fig. 4, a kind of self-lubricating tensile clamp of wedge-shaped jaw testing machine, including grip slipper 1, hydraulic cylinder 4, jaw baffle plate 2, slide block 3, power drive plate 5 and grip block 6, the side that the side wall surface of the U-shaped cavity of described slide block 3 and grip slipper 1 matches is coated with high-abrasive material.The high-abrasive material of the present embodiment is molybdenum bisuphide.The method of slide block process brushing, dip-coating or roller coating completes the coating of molybdenum bisuphide film.Remaining structure is with embodiment one.
Embodiment three:
With reference to Fig. 5 to Fig. 8, a kind of self-lubricating tensile clamp of wedge-shaped jaw testing machine, including grip slipper 1, hydraulic cylinder 4, jaw baffle plate 2, slide block 3, power drive plate 5, grip block 6, grip slipper 1 has the cavity taken the shape of the letter U that oral area is narrower, bottom is wider, grip block 6 is connected with a side of slide block 3, forming jaw between two grip blocks 6, another side of slide block 3 is corresponding with the side wall surface of grip slipper U-shaped cavity；The piston rod of hydraulic cylinder 4 is passed by the bottom of U-shaped cavity and is connected with power drive plate 5；Described slide block 3 side corresponding with the side wall surface of grip slipper U-shaped cavity is provided with locating slot, friction plate 10 is bolted on slide block 3, friction plate 10 is made to be embedded in locating slot, the lateral surface of friction plate 10 matches and the sliding friction surface that partners with the side wall surface of grip slipper U-shaped cavity, and slide block 3 can slide in the space being made up of side wall surface and the jaw baffle plate 2 of U-shaped cavity.
The thickness of friction plate 10 is more than the degree of depth of locating slot so that friction plate 10 protrudes from slide block 3 side that the side wall surface with grip slipper U-shaped cavity matches；The width of friction plate 10 is more than the width of slide block 3 side, making jaw baffle plate 2 only contact with friction plate 10 and not contact with slide block 3, so, the face of sliding friction is all on the friction plate 10 inlayed, improve original friction, sliding properties, lifting clamp performance and used life；The height of friction plate 10 is suitable with the height of locating slot, and friction plate 10 is bolted in the locating slot of slide block 3.Side corresponding with jaw baffle plate 2 on slide block 3 is provided with gathering sill 8, and jaw baffle plate 2 is correspondingly provided with gib block 9, and gathering sill 8 is corresponding to the width of gib block 9, and the degree of depth of gathering sill 8 is more than the height of gib block 9, and gib block 9 can slide in gathering sill 8.The friction plate 10 of the present embodiment uses tin bronze plate.
Embodiment four:
With reference to Fig. 5 to Fig. 8, a kind of self-lubricating tensile clamp of wedge-shaped jaw testing machine, including grip slipper 1, hydraulic cylinder 4, jaw baffle plate 2, slide block 3, power drive plate 5, grip block 6, the friction plate 10 inlayed on side corresponding with the side wall surface of grip slipper U-shaped cavity on slide block 3 uses spheroidal graphite cast-iron plate, and remaining structure is with embodiment three.
Embodiment five:
With reference to Fig. 5 to Fig. 8, a kind of self-lubricating tensile clamp of wedge-shaped jaw testing machine, including grip slipper 1, hydraulic cylinder 4, jaw baffle plate 2, slide block 3, power drive plate 5, grip block 6, the friction plate 10 inlayed on side corresponding with the side wall surface of grip slipper U-shaped cavity on slide block 3 uses powder metallurgy plate, powder metallurgy plate can be copper-based material, can also be iron etc., uses the processing method of powder metallurgy to obtain powder metallurgy plate.Remaining structure is with embodiment three.
Claims (10)
1. a self-lubricating tensile clamp of wedge-shaped jaw testing machine, including grip slipper, hydraulic cylinder, jaw baffle plate, slide block, power drive plate and grip block, grip slipper has the cavity taken the shape of the letter U that oral area is narrower, bottom is wider, grip block is connected with a side of slide block, forming jaw between two grip blocks, another side of slide block is corresponding with the side wall surface of grip slipper U-shaped cavity；The piston rod of hydraulic cylinder is passed by the bottom of U-shaped cavity and is connected with power drive plate, it is characterized in that: another side of described slide block matches and the sliding friction surface that partners with the side wall surface of grip slipper U-shaped cavity, and slide block can slide in the space being made up of side wall surface and the jaw baffle plate of U-shaped cavity；It is coated with high-abrasive material on the side that the side wall surface of described slide block and grip slipper U-shaped cavity matches.
Self-lubricating tensile clamp of wedge-shaped jaw testing machine the most according to claim 1, it is characterized in that: side corresponding with jaw baffle plate on described slide block is provided with gathering sill, it is correspondingly provided with gib block on jaw baffle plate, gathering sill is corresponding to the width of gib block, the degree of depth of gathering sill is more than the height of gib block, gib block can slide in gathering sill, and the sliding surface contacted with gib block on side corresponding with jaw baffle plate on slide block, on gathering sill is coated with high-abrasive material.
Self-lubricating tensile clamp of wedge-shaped jaw testing machine the most according to claim 1 and 2, it is characterised in that: described high-abrasive material is Teflon.
Self-lubricating tensile clamp of wedge-shaped jaw testing machine the most according to claim 1 and 2, it is characterised in that: described high-abrasive material is molybdenum bisuphide.
5. a self-lubricating tensile clamp of wedge-shaped jaw testing machine, including grip slipper, hydraulic cylinder, jaw baffle plate, slide block, power drive plate, grip block, grip slipper has the cavity taken the shape of the letter U that oral area is narrower, bottom is wider, grip block is connected with a side of slide block, forming jaw between two grip blocks, another side of slide block is corresponding with the side wall surface of grip slipper U-shaped cavity；The piston rod of hydraulic cylinder is passed by the bottom of U-shaped cavity and is connected with power drive plate, it is characterized in that: on the side that described slide block is corresponding with the side wall surface of grip slipper U-shaped cavity, be inlaid with friction plate, the lateral surface of described friction plate matches and the sliding friction surface that partners with the side wall surface of grip slipper U-shaped cavity, and slide block can slide in the space being made up of side wall surface and the jaw baffle plate of U-shaped cavity.
Self-lubricating tensile clamp of wedge-shaped jaw testing machine the most according to claim 5, it is characterised in that: the described slide block side corresponding with the side wall surface of grip slipper U-shaped cavity is provided with locating slot, and described friction plate is arranged in locating slot；The thickness of described friction plate is more than the degree of depth of locating slot；The width of described friction plate is more than the width of slide block side；The height of described friction plate is suitable with the height of locating slot, and friction plate is bolted in the locating slot of slide block.
Self-lubricating tensile clamp of wedge-shaped jaw testing machine the most according to claim 5, it is characterized in that: side corresponding with jaw baffle plate on described slide block is provided with gathering sill, it is correspondingly provided with gib block on jaw baffle plate, gathering sill is corresponding to the width of gib block, the degree of depth of gathering sill is more than the height of gib block, and gib block can slide in gathering sill.
8. according to the self-lubricating tensile clamp of wedge-shaped jaw testing machine described in claim 5 or 6 or 7, it is characterised in that: described friction plate is tin bronze plate.
9. according to the self-lubricating tensile clamp of wedge-shaped jaw testing machine described in claim 5 or 6 or 7, it is characterised in that: described friction plate is spheroidal graphite cast-iron plate.
10. according to the self-lubricating tensile clamp of wedge-shaped jaw testing machine described in claim 5 or 6 or 7, it is characterised in that: described friction plate is powder metallurgy plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610216052.1A CN105890990A (en) | 2016-04-10 | 2016-04-10 | Tensile clamp for self-lubricating wedge jaw testing machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610216052.1A CN105890990A (en) | 2016-04-10 | 2016-04-10 | Tensile clamp for self-lubricating wedge jaw testing machine |
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| CN105890990A true CN105890990A (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610216052.1A Pending CN105890990A (en) | 2016-04-10 | 2016-04-10 | Tensile clamp for self-lubricating wedge jaw testing machine |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107462463A (en) * | 2017-08-04 | 2017-12-12 | 爱佩仪中测（成都）精密仪器有限公司 | Suitable for the clamping means of cylindrical parts test for tensile strength |
| CN107478505A (en) * | 2017-08-04 | 2017-12-15 | 爱佩仪中测（成都）精密仪器有限公司 | The application method of adjustable test for tensile strength templin chuck |
| CN107515152A (en) * | 2017-08-04 | 2017-12-26 | 爱佩仪中测（成都）精密仪器有限公司 | Suitable for the clamp system of universal testing machine test for tensile strength |
| CN108896384A (en) * | 2018-08-01 | 2018-11-27 | 吉林大学 | Wedge gripping jaw for the tension test that is powered |
| CN112229725A (en) * | 2020-08-03 | 2021-01-15 | 浙江中科仪器有限公司 | Shock-free material tensile testing machine |
| CN114295470A (en) * | 2021-12-16 | 2022-04-08 | 张家港宏昌钢板有限公司 | Clamp baffle of tensile testing machine and manufacturing method thereof |
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| CN105203397A (en) * | 2015-10-30 | 2015-12-30 | 安徽佳力奇航天碳纤维有限公司 | Electronic tensile machine for testing performance of carbon fiber composite |
| CN205506554U (en) * | 2016-04-10 | 2016-08-24 | 济南天辰试验机制造有限公司 | Self -lubricating wedge tensile anchor clamps of testing machine of keeping silent |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107462463A (en) * | 2017-08-04 | 2017-12-12 | 爱佩仪中测（成都）精密仪器有限公司 | Suitable for the clamping means of cylindrical parts test for tensile strength |
| CN107478505A (en) * | 2017-08-04 | 2017-12-15 | 爱佩仪中测（成都）精密仪器有限公司 | The application method of adjustable test for tensile strength templin chuck |
| CN107515152A (en) * | 2017-08-04 | 2017-12-26 | 爱佩仪中测（成都）精密仪器有限公司 | Suitable for the clamp system of universal testing machine test for tensile strength |
| CN108896384A (en) * | 2018-08-01 | 2018-11-27 | 吉林大学 | Wedge gripping jaw for the tension test that is powered |
| CN108896384B (en) * | 2018-08-01 | 2020-11-27 | 吉林大学 | Wedge-shaped clamp jaw for electrification tensile test |
| CN112229725A (en) * | 2020-08-03 | 2021-01-15 | 浙江中科仪器有限公司 | Shock-free material tensile testing machine |
| CN112229725B (en) * | 2020-08-03 | 2023-09-01 | 浙江中科仪器有限公司 | Vibration-free material tensile testing machine |
| CN114295470A (en) * | 2021-12-16 | 2022-04-08 | 张家港宏昌钢板有限公司 | Clamp baffle of tensile testing machine and manufacturing method thereof |
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