CN206248435U - Improve the steel pipe homogeneous tube stretching device of detection stable mechanical property - Google Patents
Improve the steel pipe homogeneous tube stretching device of detection stable mechanical property Download PDFInfo
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- CN206248435U CN206248435U CN201621310098.1U CN201621310098U CN206248435U CN 206248435 U CN206248435 U CN 206248435U CN 201621310098 U CN201621310098 U CN 201621310098U CN 206248435 U CN206248435 U CN 206248435U
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- homogeneous tube
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Abstract
Improve the steel pipe homogeneous tube stretching device of detection stable mechanical property, for the detection sample bending of steel pipe physical property, it includes Vertical Cylinders, cross cylinder, Vertical Cylinders are connected on upper bracket, and two cross cylinders are connected with lower carriage, and lower carriage is fixedly connected on submounts, lower carriage is connected with upper bracket, upper bracket is located above lower carriage, and two cross cylinders respectively connect a chuck, it is characterized in that each chuck connects one piece of clamping plate.The utility model is sampled in homogeneous tube increases homogeneous tube end intermediate location extrusion process and homogeneous tube stretching process between, makes to form a transition arcs between steel tube end part and parallel portion.Ensure that the circularity of parallel portion, close to homogeneous tube, is positioned fracture position, it is possible to prevente effectively from distance of the breaking part away from neighbouring gauge length end points<1/3L0Situation.By the analysis shows to data, standard deviation is small compared with what end was flattened, and the stability of data is preferable, while greatly improving production efficiency.
Description
Technical field
The utility model is applied to the steel pipe of external diameter≤35mm（Seamless, welding）Stretching, is mainly used in steel pipe homogeneous tube mechanics
Performance detection.
Background technology
Mechanical property is the most basic attribute of steel pipe, and the product standard of all steel pipes has to mechanical property specifically will
Ask.For domestic tube product, tensile property detection program uses GB/T 228.1《Metal material room temperature tensile is tried
Proved recipe method》Standard.Required in standard in capacity of equipment allowed band, be standard using the tensile sample of full-scale pipe section
Method, that is, homogeneous tube drawing process.However, as the change of size of pipe and tubing is big, full-scale detection may not completed, therefore
Take longitudinal band sample, horizontal band sample, the specimen method of circular specimen substitution homogeneous tube stretching.
For homogeneous tube stretching, statement can flatten that tubing two ends are ramp-like to carry out tension test in GB/T 228.1, secondary
Cut out the homogeneous tube tensile testing method tested and need end to jump a queue head.However, in the industrial production, the batch of inspection is very big, part is looked forward to
Industry day inspected number more than hundred batches.
If jumped a queue a sample using steel pipe two ends, checkout procedure is very cumbersome, and chock plug short life, need often more
Change, each pair chock plug need 2 hours can completion of processing, checkability can be had a strong impact on.
The ramp-like experiment of stretching is directly flattened a jump a queue stretching test method and steel tube end part of steel tube end part is compared
After the data of methods and resultses, there is certain difference in the stability of data, homogeneous tube end jump a queue head stretching data stability it is excellent
In the sample that homogeneous tube end is directly flattened.In addition, tension failure position there are certain requirements in GB/T228.1-2010, in standard
Explicitly point out only breaking part valid not less than 1/3 situation of original gauge length with the distance marked closest to gauge length.
Two kinds of general at present homogeneous tube drawing process, the fracture position that two ends are directly flattened is unstable, actual tests process
In, directly flattening stretching data fluctuations are larger, breaking part to the distance part of neighbouring gauge length end points<1/3L0, stability is poor；
Steel pipe two ends are jumped a queue the good stability of a tension test, but inefficiency.
The content of the invention
In order to improve detection data（Yield strength, tensile strength, elongation percentage）Stability, and improve operating efficiency, this reality
With a kind of steel pipe homogeneous tube stretching device for improving detection stable mechanical property of new offer.
In order to achieve the above object, steel pipe homogeneous tube stretching device to realize drawing process try one's best reduce tubing gauge length Duan Jing
To deformation, weaken stress mutation, test data is jumped a queue the tension test data of head close to steel pipe two ends.
Technical solutions of the utility model：The steel pipe homogeneous tube stretching device of detection stable mechanical property is improved, including it is vertical
Oil cylinder, cross cylinder, it is characterized in that Vertical Cylinders are connected on upper bracket, two cross cylinders are connected with lower carriage, lower carriage
Submounts are fixedly connected on, lower carriage is connected with upper bracket, upper bracket is located above lower carriage, and two cross cylinders are respectively connected
One chuck, each chuck connects one piece of clamping plate.
The clamping plate includes following two kinds：The first clamping plate suitable for the steel pipe sample that external diameter is 26~35mm, the first
Clamping plate is 200mm for length, and wide is 174.8mm, and thickness is the rectangular slab of 20mm, and one side centre position of clamping plate opens up jagged
Groove, the width of rebate of gap slot is 60mm, and groove depth is 88.66mm, and bottom land is circular arc that radius is R17.85mm；
Second clamping plate is 25 mm and its following steel pipe sample suitable for external diameter, and second clamping plate is 200mm for length,
Width is 176mm, and thickness is the rectangular slab of 20mm, and one side centre position of clamping plate offers gap slot, the slot opening of gap slot
Degree is 40mm, and groove depth is 88.66mm, and bottom land is circular arc that radius is R12.5mm.
The method for improving steel pipe homogeneous tube stretching detection stable mechanical property, comprises the steps：
（1）According to the outside dimension of steel pipe, one of which Boards wall is chosen the horizontal sliding position of Apparatus for Bending at low-temp, two pieces
Clamping plate is symmetrically placed and perpendicular to the ground, notch outward opening parallel to the ground.
（2）Cross cylinder slowly pushes two clamping plates, when folder distance between plates is close to diameter of steel tube, steel pipe sample end is put
Put in notch center, continue to push clamping plate until flattening shaping.
（3）The steel pipe sample other end is carried out the flattening shaping of the same manner, is made final for homogeneous tube tensile sample.
The present invention is suppressed by steel pipe sample two ends, a transition arcs is formed between end and parallel portion, both
The circularity of parallel portion close to homogeneous tube can be ensured, it is also possible to fracture position is carried out certain positioning, it is possible to prevente effectively from fracture
Distance of the place away from neighbouring gauge length end points<1/3L0Situation.
The present invention has following effects：
1st, after steel pipe tension failure, the distance of breaking part to neighbouring gauge length end points is equal>1/3L0, close to 1/2 L0, fracture
Location comparison stabilization.
2nd, after steel pipe tension failure, the section of fracture is oval closer to standard shape compared with what two ends were flattened close to circle.
3rd, by variance analysis, test data is small compared with the standard deviation of test data under former flattening mode after the present invention is implemented.
4th, the present invention compared with steel pipe two ends jump a queue head method test efficiency improve more than 5 times.
Brief description of the drawings
Fig. 1 is the structure chart of the utility model embodiment 1.
Fig. 2 be Fig. 1 along A-A to sectional view.
Fig. 3 is the right view of Fig. 1.
Fig. 4 is the structure chart of left clamping plate or right clamping plate in the utility model embodiment 1.
Fig. 5 is the structure chart of left clamping plate or right clamping plate in the utility model embodiment 2.
In figure, 1, Vertical Cylinders, 2, upper bracket, 3, cross cylinder, 4, base, 5, pressure head, 6, right chuck, 7, left chuck,
8th, left clamping plate, 9, right clamping plate, 10, lower carriage, 11, operating platform.
Specific embodiment
Embodiment 1：The present embodiment is suitable for steel pipe sample that external diameter is 26~35mm.
Shown in Fig. 1, Fig. 2, the steel pipe homogeneous tube stretching device of detection stable mechanical property, including Vertical Cylinders 1, water are improved
Flat oil cylinder 3, Vertical Cylinders 1 are connected on upper bracket 2, and two cross cylinders are connected with lower carriage 10 and are located at lower carriage 10 respectively
The left and right sides, the cross cylinder positioned at the left side of lower carriage 10 connects left chuck 7, left chuck 7 and the company of being bolted of left clamping plate 8
Connect；Cross cylinder positioned at the right side of lower carriage 10 connects right chuck 6, and right chuck 6 is bolted to connection with right clamping plate 9；Under
Support 10 is fixedly connected on above base 4, and lower carriage 10 is connected with upper bracket 2, and upper bracket 2 is located above lower carriage 10.
The left clamping plate 8 is identical with the structure of right clamping plate 9, and left clamping plate 8 is set with the mirror image of right clamping plate 9.
Left clamping plate 8 or right clamping plate 9 are 200mm for a block length, and wide is 174.8mm, and thickness is the rectangular slab of 20mm, rectangle
One side centre position of plate offers gap slot, and the width of rebate of gap slot is 60mm, and groove depth is 88.66mm, and bottom land is half
Footpath is the circular arc of R17.85mm.
Embodiment 2：The present embodiment is 25 mm and its following steel pipe sample bending suitable for external diameter.
The present embodiment is a difference in that with embodiment 1：The specification of left clamping plate 8 or right clamping plate 9：Length is 200mm, wide to be
176mm, thickness is 20mm, and the width of rebate of gap slot is 40mm, and groove depth is 88.66mm, and bottom land is circle that radius is R12.5mm
Arc.Other structures are same as Example 1.
Claims (2)
1. the steel pipe homogeneous tube stretching device of detection stable mechanical property, including Vertical Cylinders, cross cylinder, Vertical Cylinders are improved
It is connected on upper bracket, two cross cylinders are connected with lower carriage, lower carriage is fixedly connected on submounts, lower carriage and upper branch
Frame is connected, and upper bracket is located above lower carriage, and two cross cylinders respectively connect a chuck, it is characterized in that each chuck connection one
Block clamping plate.
2. the steel pipe homogeneous tube stretching device of detection stable mechanical property is improved according to claim 1, it is characterized in that described
Clamping plate include it is following any one：
（1）Clamping plate is 200mm for length, and wide is 174.8mm, and thickness is the rectangular slab of 20mm, and one side centre position of clamping plate is opened
It is provided with gap slot, the width of rebate of gap slot is 60mm, groove depth is 88.66mm, bottom land is circular arc that radius is R17.85mm；
（2）Clamping plate is 200mm for length, and wide is 176mm, and thickness is the rectangular slab of 20mm, and one side centre position of clamping plate opens up
Jagged groove, the width of rebate of gap slot is 40mm, and groove depth is 88.66mm, and bottom land is circular arc that radius is R12.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621310098.1U CN206248435U (en) | 2016-12-01 | 2016-12-01 | Improve the steel pipe homogeneous tube stretching device of detection stable mechanical property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621310098.1U CN206248435U (en) | 2016-12-01 | 2016-12-01 | Improve the steel pipe homogeneous tube stretching device of detection stable mechanical property |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206248435U true CN206248435U (en) | 2017-06-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621310098.1U Active CN206248435U (en) | 2016-12-01 | 2016-12-01 | Improve the steel pipe homogeneous tube stretching device of detection stable mechanical property |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206248435U (en) |
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2016
- 2016-12-01 CN CN201621310098.1U patent/CN206248435U/en active Active
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