CN206002384U - Grip block with radian drawing pipe test fixture - Google Patents
Grip block with radian drawing pipe test fixture Download PDFInfo
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- CN206002384U CN206002384U CN201620844393.9U CN201620844393U CN206002384U CN 206002384 U CN206002384 U CN 206002384U CN 201620844393 U CN201620844393 U CN 201620844393U CN 206002384 U CN206002384 U CN 206002384U
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- sample
- radian
- wedges
- grip block
- test fixture
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
The utility model is related to a kind of grip block with radian drawing pipe test fixture, it is characterised in that：It includes two wedges in left and right（1）, two wedges（1）Fit contact, two wedges（1）Contact surface be respectively designed to concave surface（2）And convex surface（3）, the concave surface（2）And convex surface（3）Surface all offer sawtooth（4）.Two wedge type block middle parts are respectively designed to concave surface and convex surface by this grip block with radian drawing pipe test fixture, and wedge type block contact surface is machined with sawtooth, can preferably be fitted in cambered dumbbell shape tensile sample clip position.Therefore without the need for heating pressurization being carried out to sample again, prevent sample internal physical states in sample making course from changing, affect the judgement to product quality；Shorten the sample preparation time, improve conventional efficient；Fixture is fully contacted with sample, is efficiently solved sample in drawing process and is slipped, the problem of stress strain curve shake.
Description
Technical field
The utility model is related to a kind of grip block with radian drawing pipe test fixture, mainly applies to plastic pipe
Tensile property is determined.
Background technology
GB/T 8804.2-2003 《Thermoplastic plastic pipe tensile property determines part 2 PVC-U (PVC-
U), chliorinated polyvinyl chloride (PVC-C) and high rush-resistant polyvinyl chloride (PVC-HI) tubing》Standard specifies：Nominal outside diameter is less than or waits
In the tubing of 110mm specification, the batten for intercepting should be heated certain time under suitable temperature and pressure, after pressing, sample preparation is right
Tension test is carried out afterwards again.
GB/T 8804.3-2003《Thermoplastic plastic pipe tensile property determines third portion polyolefin pipe》Standard
Regulation：Tubing of the wall thickness less than or equal to 5mm should carry out tension test using dumbbell shape sample.Sample installed in fixture and is connected in examination
Test on machine, make the major axis of sample and overlapped by the direction of pull of clamp central line, sample should be clamped, make it with respect to fixture to the greatest extent
May not be subjected to displacement.
Traditional tension test fixture clamping face is all plane, and this fixture is suitable for batten that clamping face is plane.
But for pipe with small pipe diameter（32、40、50）Polyolefin（PE）Tubing, when clamping sample using plain clamp, sample holder end arc
Degree is very big, and stretching clamp is little with sample contacts face, and the batten of bending is mismatched with clamping face, is often occurred in drawing process
Curve is shaken, the situation that sample is slipped.
And the test piece band that cuts from tubing is cambered, need to sample heating pressurization, sample making course is time-consuming and loaded down with trivial details.With
When in heating pressure process, the physical state of product easily changes, it is impossible to the physical property of true reflection product.
Content of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, provides a kind of folder with radian drawing pipe test fixture
Block is held, it is applied to the drawing pipe test of band radian, curve shake in effectively solving pipe with small pipe diameter polyolefin pipe drawing process, examination
The problem that sample is slipped, while saving the heating applanation process of pipe with small pipe diameter polychloroethylene pipes, greatly shortening the sample preparation time, improving examination
Efficiency is tested, use manpower and material resources sparingly cost.
The purpose of this utility model is realized in：
A kind of grip block with radian drawing pipe test fixture, it include two wedges in left and right, two wedges
Fit contact, and the contact surface of two wedges is respectively designed to concave surface and convex surface.
The surface of the concave surface and convex surface is equipped with sawtooth.
Compared with prior art, this grip block with radian drawing pipe test fixture has advantages below：
Two wedge type block middle parts are respectively designed to recessed by this grip block with radian drawing pipe test fixture
Face and convex surface, wedge type block contact surface process sawtooth, can preferably be fitted in cambered dumbbell shape tensile sample clamping
Position.So as to produce the advantage that：
1st, without the need for carrying out heating pressurization to sample again, prevent sample internal physical states in sample making course from changing, impact
Judgement to product quality.
2nd, shorten the sample preparation time, conventional efficient is improved, cost-effective.
3rd, fixture and sample are fully contacted, and efficiently solve sample in drawing process and slip, the problem of stress strain curve shake.
Therefore, application the utility model can greatly shorten the sample preparation time, improve test efficiency, use manpower and material resources sparingly into
This, is particularly well-suited to the use of thermoplastic plastic pipe manufacture, machining and detection field, with positive dissemination.
Description of the drawings
Fig. 1 is the structural representation of grip block of the utility model with radian drawing pipe test fixture.
Fig. 2 is the upward view of Fig. 1.
Fig. 3 is the A-A sectional view of Fig. 2.
Fig. 4 is 50 PVC sample stress strain curves（Heating flattens sample+plain clamp）.
Fig. 5 is 50 PVC sample stress strain curves（Sample+band radian fixture is not flattened）.
Fig. 6 is 50 PE tubular product sample stress strain curves（Plain clamp）.
Fig. 7 is 50 PE tubular product sample stress strain curves（Band radian fixture）.
Wherein：Wedge 1, concave surface 2, convex surface 3, sawtooth 4.
Specific embodiment
Referring to Fig. 1 to Fig. 3, the utility model is related to a kind of grip block with radian drawing pipe test fixture, including
Two wedges 1 in left and right, two wedges 1 fit contact, and the contact surface of two wedges 1 is respectively designed to concave surface 2 and convex
Face 3, the arc length of concave surface 2 and convex surface 3 can be according to different standard pipe sizes（If caliber is 50,75,90,110）It is designed, chooses
Be to correspond to one section of minor arc on circle, the surface of the concave surface 2 and convex surface 3 all opens up sawtooth 4, and sawtooth 4 can have any shape
Or direction, but sawtooth that is preferably regular, having spacing, for clamping pipe to be tested between the sawtooth 4 of concave surface 2 and convex surface 3
Material, sawtooth 4 can be used to increase snap-in force（Frictional force）, cambered tubular product sample can be securely fixed.
When this grip block with radian drawing pipe test fixture is used in the wedge cavities of fixture, work as rotation
Fixture handle, when being risen with wedge by spring, two wedges separate, such that it is able to by dumbbell shape batten to be tested
Load between two wedges, wedge is pressed downward by subsequent release handle, spring, and batten is tightly fixed, wedge type block surface
The sawtooth of design ensures, between batten and fixture, sliding does not occur.
Referring to Fig. 4 and Fig. 5, represent in PVC stress strain curve respectively, the relation of pulling force and displacement, find through calculating
There was no significant difference for the tensile yield strength result that two methods draw, not only may be used using " not flattening sample+band radian fixture "
Processing procedure is flattened to save complicated time-consuming heating, sample preparation time and cost is saved, and the stretching of stable and consistent can be obtained
Curve, truly reflects the tensile property of tubing, is worth promoting.
Referring to Fig. 6 and Fig. 7, represent in PE drawing pipe curve respectively, the relation of pulling force and displacement, two are found through calculating
There was no significant difference for the elongation at break result that the method for kind draws, illustrates on the premise of ensureing that experimental result is consistent, the fixture
Can the shake of effectively solving curve（Even sample is slipped）Phenomenon.
Claims (2)
1. a kind of grip block with radian drawing pipe test fixture, it is characterised in that：It includes two wedges in left and right
（1）, two wedges（1）Fit contact, two wedges（1）Contact surface be respectively designed to concave surface（2）And convex surface（3）.
2. a kind of grip block with radian drawing pipe test fixture according to claim 1, it is characterised in that：Described
Concave surface（2）And convex surface（3）Surface all offer sawtooth（4）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620844393.9U CN206002384U (en) | 2016-08-08 | 2016-08-08 | Grip block with radian drawing pipe test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620844393.9U CN206002384U (en) | 2016-08-08 | 2016-08-08 | Grip block with radian drawing pipe test fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206002384U true CN206002384U (en) | 2017-03-08 |
Family
ID=58200103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620844393.9U Active CN206002384U (en) | 2016-08-08 | 2016-08-08 | Grip block with radian drawing pipe test fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206002384U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108195668A (en) * | 2018-04-02 | 2018-06-22 | 福州大学 | The fixture and application method of tensile creep fatigue test clamping band radian sample |
| CN108760481A (en) * | 2018-08-15 | 2018-11-06 | 中国原子能科学研究院 | A kind of clamp structure of longitudinal direction arc tensile sample |
-
2016
- 2016-08-08 CN CN201620844393.9U patent/CN206002384U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108195668A (en) * | 2018-04-02 | 2018-06-22 | 福州大学 | The fixture and application method of tensile creep fatigue test clamping band radian sample |
| CN108760481A (en) * | 2018-08-15 | 2018-11-06 | 中国原子能科学研究院 | A kind of clamp structure of longitudinal direction arc tensile sample |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211129 Address after: No. 188, East Outer Ring Road, Jiangyin high tech Zone, Wuxi City, Jiangsu Province Patentee after: Jiangsu Chengxin Inspection Certification Co.,Ltd. Address before: 214434 building 6, 188 East Outer Ring Road, Jiangyin City, Wuxi City, Jiangsu Province Patentee before: JIANGYIN CITY PRODUCT QUALITY SUPERVISION AND INSPECTION INSTITUTE |
|
| TR01 | Transfer of patent right |