CN204882266U - Timber transverse shear intensity measurement device - Google Patents
Timber transverse shear intensity measurement device Download PDFInfo
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- CN204882266U CN204882266U CN201520672134.8U CN201520672134U CN204882266U CN 204882266 U CN204882266 U CN 204882266U CN 201520672134 U CN201520672134 U CN 201520672134U CN 204882266 U CN204882266 U CN 204882266U
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- timber
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Abstract
The utility model provides a timber transverse shear intensity measurement device, its structure includes measurand timber test piece, five timber fill blocks, a left side, the right branch bearing, the loading head, a left side, the right side presss from both sides tight head, on its methods of measurement lies in that measurand timber test piece is all applyed through the timber fill block to the loaded power of mechanical test machine, because the timber fill block is the same with the wood property of timber compoment, make the loading procedure of testing extremely approach the actual stress state of wooden pivot, make the test result can truly reflect wooden pivot band shear strength. Advantage and effect: 1 )The wooden pivot band shear strength's of correct evaluation problem has been solved, 2 )At bearing, loading head and between pressing from both sides tight head and measurand timber test piece the liner with the same timber fill block of wood property of timber compoment, the loading procedure that makes the test extremely approaches the actual stress state of wooden pivot, test result that this method of using was acquireed can truly reflect wooden pivot band shear strength, promptly timber band shear strength.
Description
Technical field
The utility model relates to a kind of timber lateral shear strength meter, belong to woodwork quality assessment field.
Background technology
Wooden pivot pin or tenon are the connected modes that timber structure and solid wood furniture are conventional, and the shear resistance of wooden pivot pin or tenon is directly connected to the structural strength of timber structure and solid wood furniture.In order to manufacture the wooden pivot pin of high shear strength or screen the wooden pin material of high shear strength, need the lateral shear intensity measuring timber.
Timber shearing strength looks External Force Acting in the direction of the grain of wood, is divided into shearing-strength of wood along the grain and shear strength perpendicular to grain.Define Method of testing in shearing stength parallel to grain of wood in the countries such as the mensuration of GB/T1937-2009 Method of testing in shearing stength parallel to grain of wood, GBT17517-1998 tackifier compression shear strength test method--timber and timber, QB/T1093-2013 furniture solid wood bonded part shear resistance or industry standard, but not yet have the standard of timber lateral shear strength measurement method at present.The reason of timber lateral shear strength measurement method standard is not had to be, phenomenon for general wood members generation shear prependicular to the grain is not only rare, and shear prependicular to the grain invariably accompanies and laterally damages fiber by pressure and produce stretching action and not simple shear prependicular to the grain, therefore usually do not measure as wood property index.But for the timber structure connected with wooden pivot pin, the phenomenon that wooden pivot pin generation shear prependicular to the grain destroys is common, and the lateral shear intensity measuring timber is very necessary.
In addition, just because the shear prependicular to the grain that wooden pivot pin shear prependicular to the grain breakoff phenomenon is not simple destroys, also producing fail in tension with fiber, therefore, wooden pivot pin shear prependicular to the grain intensity, except by except the impact of wooden self wood property of pivot pin material, is also subject to the impact of engaged timber compoment wood property.Wooden pivot pin shear prependicular to the grain intensity correctly cannot be evaluated by traditional pure shear method of testing, need a kind of wooden pivot pin shear prependicular to the grain strength measurement method close with timber structure actual loading feature, but there is no the timber lateral shear strength measurement method of this kind of pattern at present.
Summary of the invention
The utility model proposes a kind of timber lateral shear strength meter, its object is intended to solve the problem correctly cannot evaluating wooden pivot pin shear prependicular to the grain intensity by traditional measurement mechanism and pure shear method of testing.
Technical solution of the present utility model: timber lateral shear strength meter, its structure comprises measures timber test specimen (1), A, B, C, D, E five pieces of timber fill blocks (2), left, right supporting base (3), loading head (4), left, right clamping head (5), the upper surface wherein measuring timber test specimen (1) meets A, B, C tri-pieces of timber fill blocks (2), measure timber test specimen (1) lower surface and meet D, E bis-pieces of timber fill blocks (2), the surface of described A timber fill block (2) connects left clamping head (5), the surface of C timber fill block (2) connects right clamping head (5), the surface of B timber fill block (2) connects loading head (4), the lower surface of described D timber fill block (2) connects left supporting base (3), the lower surface of E timber fill block (2) connects right supporting base (3).
The principle of timber lateral shear strength measurement method is: in the actual forced status at the wooden pivot pin abutment of simulation timber compoment, utilize scissors mouth principle, loaded by mechanics machine, realize the measurement of timber lateral shear intensity.
The beneficial effects of the utility model are:
1) the correct problem evaluating wooden pivot pin shear prependicular to the grain intensity is solved;
2) in the actual forced status at the wooden pivot pin abutment of simulation timber compoment, utilize scissors mouth principle, loaded by mechanics machine, realize the measurement of timber lateral shear intensity;
3) between supporting base, loading head and clamping head with measured timber test specimen liner with the wood property of timber compoment identical timber fill block, the power that mechanics machine loads all is applied on measured timber test specimen (1) by timber fill block (2), because timber fill block (2) is identical with the wood property of timber compoment, make the loading procedure of test very close to the actual forced status of wooden pivot pin, by the test result that the method obtains, truly can reflect wooden pivot pin shear prependicular to the grain intensity, i.e. timber shear prependicular to the grain intensity.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of timber lateral shear strength meter.
In figure 1 measures timber test specimen, and 2 is timber fill blocks, and 3 is left and right supporting bases, and 4 is loading heads, and 5 is left and right clamping heads, F
1the test load that mechanics machine applies, F
2that supporting base is to timber test specimen reacting force.
Embodiment
A kind of timber lateral shear strength meter, its structure comprises measures timber test specimen (1), A, B, C, D, E five pieces of timber fill blocks (2), left, right supporting base (3), loading head (4), left, right clamping head (5), the upper surface wherein measuring timber test specimen (1) meets A, B, C tri-pieces of timber fill blocks (2), measure timber test specimen (1) lower surface and meet D, E bis-pieces of timber fill blocks (2), the surface of described A timber fill block (2) connects left clamping head (5), the surface of C timber fill block (2) connects right clamping head (5), the surface of B timber fill block (2) connects loading head (4), the lower surface of described D timber fill block (2) connects left supporting base (3), the lower surface of E timber fill block (2) connects right supporting base (3).
Described A, B, C, D, E five pieces of timber fill blocks (2), left and right supporting base (3), loading head (4), the width 30mm of left and right clamping head (5).
Height >=the 20mm of described A, B, C, D, E five pieces of timber fill blocks (2).
Gap 0.5mm between described loading head (4) and left and right supporting base (3).
Its measuring method, comprises
1) left and right supporting base (3), loading head (4), left and right clamping head (5) must be made with metal, left and right supporting base (3), loading head (4), left and right clamping head (5) width dimensions are 30mm, height dimension should be greater than 20mm, and ensureing has enough rigidity indeformable in test process;
2) five pieces of timber fill blocks (2) must adopt timber identical with the wood property of timber compoment to be made, otherwise can affect test correctness; Highly >=20mm;
3) measured timber test specimen (1) two ends have the left and right clamping head (5) of timber fill block (2) and liner to have the left and right supporting base (3) of timber fill block (2) to clamp by liner;
4) gap between loading head (4) and left and right supporting base (3) will be strict controlled in 0.5mm, otherwise can affect test correctness; The loading velocity of mechanics machine controls at 2 ~ 3mm/min.
Embodiment
As shown in Figure 1, left and right supporting base (3), loading head (4), left and right clamping head (5) must be made with metal, and width dimensions is 30mm, and height dimension should be greater than 20mm, and ensureing has enough rigidity indeformable in test process; Five pieces of timber fill blocks (2) have employed with by wooden pivot pin (that is, measured timber) the identical material of the timber compoment that connects be made, otherwise test correctness can be affected; Measured timber test specimen (1) two ends have the left and right clamping head (5) of timber fill block (2) and liner to have the left and right supporting base (3) of timber fill block (2) to clamp by liner.Clearance control between loading head (4) and left and right supporting base (3) at 0.5mm, otherwise can affect test correctness; The loading velocity of mechanics machine controls at 2 ~ 3mm/min.
Claims (4)
1. a timber lateral shear strength meter, it is characterized in that comprising and measure timber test specimen (1), A, B, C, D, E five pieces of timber fill blocks (2), left, right supporting base (3), loading head (4), left, right clamping head (5), the upper surface wherein measuring timber test specimen (1) meets A, B, C tri-pieces of timber fill blocks (2), measure timber test specimen (1) lower surface and meet D, E bis-pieces of timber fill blocks (2), the surface of described A timber fill block (2) connects left clamping head (5), the surface of C timber fill block (2) connects right clamping head (5), the surface of B timber fill block (2) connects loading head (4), the lower surface of described D timber fill block (2) connects left supporting base (3), the lower surface of E timber fill block (2) connects right supporting base (3).
2. a kind of timber lateral shear strength meter according to claim 1, is characterized in that described A, B, C, D, E five pieces of timber fill blocks (2), left and right supporting base (3), loading head (4), the width 30mm of left and right clamping head (5).
3. a kind of timber lateral shear strength meter according to claim 1, is characterized in that the height >=20mm of described A, B, C, D, E five pieces of timber fill blocks (2).
4. a kind of timber lateral shear strength meter according to claim 2, is characterized in that the gap 0.5mm between described loading head (4) and left and right supporting base (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520672134.8U CN204882266U (en) | 2015-09-01 | 2015-09-01 | Timber transverse shear intensity measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520672134.8U CN204882266U (en) | 2015-09-01 | 2015-09-01 | Timber transverse shear intensity measurement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204882266U true CN204882266U (en) | 2015-12-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520672134.8U Expired - Fee Related CN204882266U (en) | 2015-09-01 | 2015-09-01 | Timber transverse shear intensity measurement device |
Country Status (1)
| Country | Link |
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| CN (1) | CN204882266U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105115836A (en) * | 2015-09-01 | 2015-12-02 | 南京林业大学 | Timber transverse shearing strength measurement device and method |
-
2015
- 2015-09-01 CN CN201520672134.8U patent/CN204882266U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105115836A (en) * | 2015-09-01 | 2015-12-02 | 南京林业大学 | Timber transverse shearing strength measurement device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Nanjing City, Jiangsu province 210037 Longpan Road No. 159 Co-patentee after: Yihua life Polytron Technologies Inc Patentee after: Nanjing Forestry University Address before: Nanjing City, Jiangsu province 210037 Longpan Road No. 159 Co-patentee before: Guangdong Province Yihua Timber Industry Co., Ltd. Patentee before: Nanjing Forestry University |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151216 Termination date: 20190901 |