CN105067402A - Mold used for preparing test piece for tensile strength testing and application method thereof - Google Patents
Mold used for preparing test piece for tensile strength testing and application method thereof Download PDFInfo
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- CN105067402A CN105067402A CN201510447676.XA CN201510447676A CN105067402A CN 105067402 A CN105067402 A CN 105067402A CN 201510447676 A CN201510447676 A CN 201510447676A CN 105067402 A CN105067402 A CN 105067402A
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Abstract
The invention discloses a mold used for preparing a test piece for tensile strength testing and an application method thereof. The mold comprises connection boards located at two sides; the two connection boards are arranged in parallel, and one ends of the two connection board are connected via a support bar; two vertical boards are arranged between the connection boards and are parallel to each other and perpendicular to the connection boards; a four-side enclosed framework is defined by enclosure of the two connection boards and the two vertical boards; the bottom of the framework is provided with a base; a core ejecting head is arranged at the center of the base and is provided with a base plate; and separator plates used for separating test pieces are arranged in the framework. The test piece prepared by using the mold can authentically reflect interfacial bonding performance and has the advantages of good quality, high precision and easiness in demolding.
Description
Technical field
The present invention relates to a kind of mould, be specially a kind of mould for the preparation of pull strength test test specimen.
Background technology
At present, in motor charge process, it is extremely important with necessity for how detecting interfacial adhesion strength, especially heat insulation layer, combine bonding strength between lining with propellant.Usual employing synchronously makes the method that test specimen carries out testing.Bonding strength data reliability key is the standardization that test specimen makes, current making mould is fairly simple, test specimen have local misalignment between steel part one to one, cause it second-rate, data stability is poor, and mainly takes hand ejection to operate, and has potential safety hazard.
Summary of the invention
The object of this invention is to provide a kind of mould for the preparation of pull strength test test specimen and using method thereof, the test specimen prepared by this mould is more accurate, representative, and is convenient in demoulding, and can not damage mould, and security is good.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of mould for the preparation of pull strength test test specimen, comprise the web joint being positioned at both sides, two pieces of web joints be arranged in parallel, and one end is connected by support bar, be provided with vertical two pieces of risers between web joint, two pieces of risers are parallel to each other, vertically with web joint to arrange, surround the closed framework in four sides by two pieces of web joints and two pieces of risers; The bottom of framework is provided with base, and the center of base is provided with plunger tip head, and plunger tip head is provided with base plate, is also provided with the dividing plate for being separated by test specimen in framework.
Further, one end of described riser is connected and fixed by bearing and web joint; Namely be connected by bearing with between web joint at the riser of base of frame, and fix with being carried out installation by bolt, be convenient to adjustment and dismounting.
Further, one end of two pieces of risers is arranged with groove respectively, is connected with stiffener between two grooves; Better can locate riser by stiffener, prevent from occurring slippage or dislocation between the two,
Further, be also provided with the pressing plate for fixing test specimen to be prepared between two pieces of web joints, positioned by bolt between pressing plate and web joint.Compressed by pressing plate and test specimen to be prepared, fixing test specimen to be prepared, prevents it from occurring in the process of solidification and is moved further.
Further, the surrounding of described web joint and middle part are provided with multiple hole, and hole is around used between web joint and the installation of web joint and miscellaneous part is located, and the hole at middle part is convenient to observe and install test specimen to be prepared.
Further, the center of described base is provided with through hole, the aperture at these through hole two ends is greater than median pore radius, described plunger tip head is arranged on through hole, and a part for plunger tip head is positioned at through hole, and the position less by median pore radius clamps, in the process of the demoulding, employing instrument exerts a force to plunger tip head to the below of base plate through holes, makes it loosen, conveniently prepares the taking-up of test specimen.
Further, be also provided with backing plate and baffle plate between described two pieces of risers, backing plate and baffle plate correspondence are arranged, positioned by bolt and riser, backing plate and baffle plate can coordinate pressing plate and stiffener to install, and to obtain the test specimen of required form, and realize more accurate location.
Adopt described mould to prepare the method for pull strength test test specimen, comprise the following steps:
1) on the steel part preparing the two ends needed for test specimen, make heat insulation layer or lining, form end, be then respectively charged between two pieces of risers, clamped by riser, two end symmetric are arranged; Install from base plate, alternately load dividing plate and end, after being in place, it is positioned, and web joint is fixed;
2) from top to bottom toward two ends steel part between inject medicine slurry, treat that it solidify, formation powder column;
3) by instrument, plunger tip head is upwards pushed, the subassembly that top pine is formed together by powder column and two ends, take out base plate and dividing plate, cutting shaping is carried out to it, obtain the single pull strength test test specimen of required preparation.
Further, the instrument described in step 3) comprises location-plate and core ejecting device, and described location-plate coordinates with base, and core ejecting device is positioned at the below of location-plate.
The beneficial effect that mould provided by the invention has is:
The step of the test specimen 1, prepared is with motor charge Complete Synchronization and process conditions are identical, and the test specimen obtained truly can reflect the interfacial adhesion of engine.
When 2, solving traditional test material preparation, easily misplace between steel part, cause the problem that interfacial adhesion strength fluctuates, preparation method is advantages of simple more, handwork and uncontrollable factor reduce, and the test specimen of preparation is more unified and representative, improves test specimen degree of accuracy and quality.
3, mechanical plunger tip is adopted to solve the difficult problem of the demoulding of traditional mode existence, avoid and use wooden mallet to beat, to the damage of mould and to test specimen generation destruction, and improve the security of operation, thoroughly solve hit mode and easily cause propellant etc. to produce the hidden danger of burning and blast.
Accompanying drawing explanation
Fig. 1 is the structural representation of single pull strength test test specimen provided by the invention.
Fig. 2 is the assembling unit structure schematic diagram being tested test specimen connection by 5 groups of pull strengths after the demoulding.
Fig. 3 is the structural representation of mould of the present invention.
Fig. 4 is mold use view of the present invention.
Fig. 5 is the structural representation of steel part.
Fig. 6 is the structural representation of web joint.
Fig. 7 is the structural representation of riser.
Fig. 8 is the structural representation of base.
Fig. 9 is the structural representation of base plate.
Figure 10 is the structural representation of plunger tip head.
Figure 11 is the structural representation of pressing plate.
Figure 12 is the structural representation of dividing plate.
Figure 13 is the structural representation of bearing.
Figure 14 is the structural representation of baffle plate.
Figure 15 is the structural representation of backing plate.
Figure 16 is test specimen demoulding schematic diagram.
Embodiment
Further illustrate the present invention below in conjunction with embodiment and accompanying drawing 1-16, but the scope of protection of present invention is not limited to the scope of embodiment statement.
A kind of mould for the preparation of pull strength test test specimen, comprise the web joint 1 being positioned at both sides, two pieces of web joints be arranged in parallel, and one end is connected by support bar 2, vertical two pieces of risers 3 are provided with between web joint, two pieces of risers 3 are parallel to each other, and vertically with web joint 1 arrange, and surround the closed framework in four sides by two pieces of web joints and two pieces of risers; The bottom of framework is provided with base 4, and the center of base is provided with plunger tip head 5, and plunger tip head 5 is provided with base plate 6, is also provided with the dividing plate 7 for being separated by test specimen in framework.
As shown in Figure 6, web joint 1 is in I-shaped, and the surrounding of web joint and middle part are provided with multiple hole, and two above it holes having groove are for connecting support bar and nut, and be cylindric in the middle of support bar 2, two ends are threaded; The through hole of bottom outside, for connecting bearing 8, can also arrange packing ring between web joint and bearing, plays the effect of buffering and adjustment distance; The through hole being provided with strip of bottom centre, can be used for observing.The special-shaped through hole at middle part conveniently observes installation, and manhole is used for fitted bolt and installs pressing plate.
As shown in Figure 7, one end of riser 3 is connected and fixed by bearing 8 and web joint 1 riser structure, and described bearing is set to two, is positioned at the below of framework, and the structure of bearing as shown in figure 13.
In preferred scheme, one end of two pieces of risers is arranged with groove 31 respectively, is connected with stiffener 9 between two grooves 31, the centre of stiffener is rectangular-shaped, and two ends are cylindric, and cylindric on external thread, rectangular-shaped part is also provided with center pit, is threaded in hole.
In preferred scheme, be also provided with the pressing plate 10 for fixing test specimen to be prepared between two pieces of web joints, positioned by bolt between pressing plate 10 and web joint, the structure of pressing plate as shown in figure 11.
As shown in Figure 8, as shown in Figure 9, the structure of plunger tip head as shown in Figure 10 for the structure of base plate for the structure of base.
In preferred scheme, the center of described base 4 is provided with through hole 41, and the aperture at these through hole two ends is greater than median pore radius, and described plunger tip head is arranged on through hole 41, and a part for plunger tip head is positioned at through hole 41.
The top of described plunger tip head is provided with projection, and the bottom of base plate is provided with the groove coordinated with it, and plunger tip head is connected with groove fit by projection with between base plate.
As shown in figure 14, the structure of backing plate as shown in figure 15, in preferred scheme, is also provided with backing plate 11 and baffle plate 12 between described two pieces of risers 3 to the structure of baffle plate, and backing plate 11 and baffle plate 12 correspondence are arranged, and are positioned by bolt and riser 3.
Adopt described mould to prepare the method for pull strength test test specimen, comprise the following steps:
1) on the steel part 15 preparing the two ends needed for test specimen, make heat insulation layer or lining 16, form end, be then respectively charged between two pieces of risers, clamped by riser, two end symmetric are arranged; Install from base plate, alternately load dividing plate and end, after being in place, it is positioned, and web joint is fixed; As described in figures 1 and 5, wherein steel part comprises the square plate body of a block length, and the one side of plate body is connected with rectangular parallelepiped boss upwards, and another side is connected with right cylinder, and right cylinder is offered porose.Be close to steel part and be provided with heat insulation layer or lining, middle layer is the powder column formed after the solidification of medicine slurry;
2) from top to bottom toward two ends steel part between inject medicine slurry, treat that it solidify, formation powder column 17;
3) by instrument, plunger tip head is upwards pushed, the subassembly that top pine is formed together by powder column and two ends, take out base plate and dividing plate, cutting shaping is carried out to it, obtain the single pull strength test test specimen of required preparation.
Wherein, medicine slurry used is composite solidpropellant or PBX explosive.
Further, the instrument described in step 3) comprises location-plate 13 and core ejecting device 14, and as shown in figure 16, described location-plate coordinates with base, and core ejecting device is positioned at the below of location-plate.
This mould by bolt by base, riser, bearing, stiffener, web joint, support bars etc. connect fastening, form overall framed structure, then assemble plunger tip head and base plate in turn, finally erection bolt on web joint, during screw-in, requires that bolt tail end end face can not protrude from the opposite side of web joint.Its structural representation is shown in Fig. 3.In use, as without special circumstances, framed structure can not be torn open.
In order to the security of the demoulding, the demoulding adopts isolated operation.Unscrew the bolt of web joint, take out depression bar, remove stiffener, by location-plate 13 and screw by this die assembly on core ejecting device 14, see Figure 16.Dependence equipment pushes plunger tip head, the subassembly that top pine is formed after starching solidification by medicine together with integral unit.Take out base plate and dividing plate, if desired, use base plate extractor and dividing plate extractor to remove base plate and dividing plate.Take out the subassembly formed together with integral unit after starching solidification by medicine, as shown in Figure 2.After cutting shaping, do pull strength test.
Steel part is reusable, before reusing, only need clear up medicine slurry and heat insulation layer or lining, return to original steel part form, can carry out the making that pull strength tests test specimen.
Claims (9)
1. the mould for the preparation of pull strength test test specimen, it is characterized in that: comprise the web joint (1) being positioned at both sides, two pieces of web joints be arranged in parallel, and one end is connected by support bar (2), vertical two pieces of risers (3) are provided with between web joint, two pieces of risers (3) are parallel to each other, and vertically with web joint (1) arrange, and surround the closed framework in four sides by two pieces of web joints and two pieces of risers; The bottom of framework is provided with base (4), and the center of base is provided with plunger tip head (5), and plunger tip head (5) is provided with base plate (6), is also provided with the dividing plate (7) for being separated by test specimen in framework.
2. mould according to claim 1, is characterized in that: one end of described riser (3) is connected and fixed by bearing (8) and web joint (1).
3. mould according to claim 1, is characterized in that: one end of two pieces of risers is arranged with groove (31) respectively, is connected with stiffener (9) between two grooves (31).
4. mould according to claim 1, is characterized in that: be also provided with the pressing plate (10) for fixing test specimen to be prepared between two pieces of web joints, positioned between pressing plate (10) and web joint by bolt.
5. mould according to claim 4, is characterized in that: the surrounding of described web joint and middle part are provided with multiple hole.
6. mould according to claim 1, it is characterized in that: the center of described base (4) is provided with through hole (41), the aperture at these through hole two ends is greater than median pore radius, and described plunger tip head is arranged on through hole (41), and a part for plunger tip head is positioned at through hole (41).
7. mould according to claim 1, is characterized in that: be also provided with backing plate (11) and baffle plate (12) between described two pieces of risers (3), and backing plate (11) and baffle plate (12) correspondence are arranged, and are positioned by bolt and riser (3).
8. adopt the mould described in claim 1-7 any one to prepare the method for pull strength test test specimen, it is characterized in that, comprise the following steps:
1) on the steel part preparing the two ends needed for test specimen, make heat insulation layer or lining, form end, be then respectively charged between two pieces of risers, clamped by riser, two end symmetric are arranged; Install from base plate, alternately load dividing plate and end, after being in place, it is positioned, and web joint is fixed;
2) from top to bottom toward two ends steel part between inject medicine slurry, treat that it solidify, formation powder column;
3) by instrument, plunger tip head is upwards pushed, the subassembly that top pine is formed together by powder column and two ends, take out base plate and dividing plate, cutting shaping is carried out to it, obtain the single pull strength test test specimen of required preparation.
9. method according to claim 8, is characterized in that: the instrument described in step 3) comprises location-plate and core ejecting device, and described location-plate coordinates with base (4), and core ejecting device is positioned at the below of location-plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510447676.XA CN105067402B (en) | 2015-07-28 | 2015-07-28 | A kind of mould and its application method for being used to prepare pull-off strength test test specimen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510447676.XA CN105067402B (en) | 2015-07-28 | 2015-07-28 | A kind of mould and its application method for being used to prepare pull-off strength test test specimen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105067402A true CN105067402A (en) | 2015-11-18 |
| CN105067402B CN105067402B (en) | 2017-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510447676.XA Active CN105067402B (en) | 2015-07-28 | 2015-07-28 | A kind of mould and its application method for being used to prepare pull-off strength test test specimen |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106153476A (en) * | 2016-08-09 | 2016-11-23 | 宁波中加低碳新技术研究院有限公司 | Timber rolls modulus of shearing and the method for testing of intensity |
| CN111141566A (en) * | 2019-11-29 | 2020-05-12 | 上海航天化工应用研究所 | Forming method of rectangular tear-off test piece of solid rocket engine |
| CN114112901A (en) * | 2021-12-08 | 2022-03-01 | 上海煤科检测技术有限公司 | Experimental device and method for testing characteristics of reactive polymer material for coal mine |
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| US4552706A (en) * | 1983-10-05 | 1985-11-12 | The United States Of America As Represented By The Secretary Of The Army | Liner-propellant bond tests |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106153476A (en) * | 2016-08-09 | 2016-11-23 | 宁波中加低碳新技术研究院有限公司 | Timber rolls modulus of shearing and the method for testing of intensity |
| CN111141566A (en) * | 2019-11-29 | 2020-05-12 | 上海航天化工应用研究所 | Forming method of rectangular tear-off test piece of solid rocket engine |
| CN114112901A (en) * | 2021-12-08 | 2022-03-01 | 上海煤科检测技术有限公司 | Experimental device and method for testing characteristics of reactive polymer material for coal mine |
| CN114112901B (en) * | 2021-12-08 | 2024-01-30 | 上海煤科检测技术有限公司 | Experimental device and method for testing characteristics of reactive polymer materials for coal mine |
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| Publication number | Publication date |
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| CN105067402B (en) | 2017-11-14 |
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