• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The disclosure relates to a method for the nondestructive testing of wood to determine the impact strength thereof essentially independently of the moisture content. The method involves driving a piercing plug having a blunt head into a body of wood substantially transverse to the grain thereof by imparting to said piercing plug a predetermined amount of kinetic energy to cause the plug to penetrate the wood and rupture fibers thereof to produce surfaces of fracture as a result of dynamic bending stress and dynamic tensile stress of the wood fibers, and determining the extent of penetration of the plug into the wood, whereby said extent of penetration is proportional to the impact strength of the wood.
    公开号:SU847946A3
    申请号:SU762396658
    申请日:1976-09-03
    公开日:1981-07-15
    发明作者:Хоффмайер Пребен
    申请人:Вуд-Слимп Гмбх (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to testing equipment, namely, devices for determining the strength properties of wood.
    The closest to the invention according to g technical essence is a device for determining the strength properties of wood, comprising a body, an inertial mass accommodated therein, and a spring for accelerating the mass, an arrangement for inertial mass and charging a spring, a mechanism for fixing the mass and a spring during the cocked state, the mass-connected rod for inserting into the test specimen | g of wood, placed on the body of the probe for measuring the depth of penetration, nor the rod. The rod end inserted into the sample is made with a pointed torus fl.20
    The disadvantage of this device is the relatively low accuracy of the tests.
    The purpose of the invention is to improve the accuracy of the tests.
    The goal is achieved by the fact that the end of the rod inserted into the sample is made with a flat end face.
    FIG. 1 shows the device; side view; in fig. 2 - device with a fully open rod; in fig. 3 - the device in the process of entering the rod into the wood.
    权利要求:
    Claims (2)
    [1]
    The device comprises a housing 1, at the front end of which an element 2 is placed, an inertial mass 3 housed in the housing 1, a rod 4 for accelerating a weight 3, connected to a weight 3 a rod 5 for inserting wood into the test sample 6 butt end 7. Pruzkina 7 is attached at one end to the front end of the inertial mass 3, and the other to element 2. When spring 4 is compressed, as shown in FIG. 2, the rod 5 is in the forward extended position. When moving the inertial mass 3 back to the start-up 1, the spring 4 is loaded. The movement of the inertial mass 3 and the charging of the spring 4 is carried out by a special device (not shown). To fix the mass 3 and the spring 4 in the cocked state (FIG serves as a fixing mechanism comprising a pin 8 with a head 9, a swinging lever 10, which at its one end interacts with the head 9 of a pin 8. The lever 10 rotates on an axis 11 attached to the body 1, and interacts with the head 9 of the pin 8 by means of a spring 12 acting on the other end of the lever 10. The release of the inertial mass 3 occurs when the lever 10 is pressed on the spring 12. This is achieved by means of the starting handle 13, which forms the rear end of the body 1. fixed to n next by means of a spring 14.. As shown in Fig. 1, an opening 15 is provided in the housing 1. It is positioned in such a way that the amount of insertion of the rod 5 into the test sample 6 can be seen. rod 5, which is removable. A pin 17 is provided for fixing the rod 5 in the extended position, which fixes the rod 5 manually. The front end of the element 2 is made with oblique cuts forming an inclined contact plane 18. In FIG. 1, two opposite bevelled surfaces 18 are shown, and one or more protrusions 19 are provided on the parts of the front end of the element 2 having no cuts, as shown in FIG.
    [2]
    2. These protrusions 19 facilitate the insertion process, since they can enter and hold the material during start-up. If it is required to pierce at an angle, the planes 18 are used to guide the tool, which is convenient when checking the dug-in poles, since in this case there is no need to remove a large amount of soil. The device works as follows. The inertial mass 3 is moved and the spring 4 is charged and fixed in the cocked position by the locking mechanism. Pressing the handle 13 overcomes the force from the springs 12 and 14, as a result of which the finger 10 is pressed from the head 9 of the pin 8 and the inertial mass 3 moves forward under the action of the spring 4, and the rod 5 leaves the housing 1. Formula of the invention properties of wood, comprising a housing, an inertial mass accommodated therein, and a spring for accelerating the mass, a device for moving the inertial mass and charging the spring. The mechanism for fixing the mass and the spring in the cocked state is associated with a mass rod for inserting a wood sample into the test case, a housing on the case for measuring the rod penetration depth, which, in order to increase the accuracy of the tests, is introduced into the sample end the rod is made with a flat end. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 55710, cl. G 01 N 3/48, 1938 (prototype).
    R
    Ha
    类似技术:
    公开号 | 公开日 | 专利标题
    SU847946A3|1981-07-15|Device for determining strength properties of wood
    Marshall et al.1973|Fracture toughness and absorbed energy measurements in impact tests on brittle materials
    EP0280711B1|1993-11-18|Device to measure the tenderness of meat
    US3421364A|1969-01-14|Methods of and apparatus for measuring the hardness of materials
    SU971119A3|1982-10-30|Method and apparatus for measuring hardness of material by elastic rebound technique
    Maloney et al.1977|The physical properties of fingernails I. apparatus for physical measurements
    US3630073A|1971-12-28|Tablet measuring and testing device
    SU909626A1|1982-02-28|Method of testing materials for strength
    SU1682879A1|1991-10-07|Hardness gauge
    RU2142617C1|1999-12-10|Device to determine strength properties of thin-walled structures
    RU2644445C1|2018-02-12|Device for determining the strength of snow cover on avalanche slopes
    SU871067A1|1981-10-07|Device for determination of concrete strength in structure
    RU94018290A|1996-05-10|Device for determining rock strength
    SU864085A1|1981-09-15|Device for evaluating sensitivity of mathches to inflammation
    SU735959A1|1980-05-25|Method of impact testing of materials for bending
    US4018084A|1977-04-19|Acoustic emissions simulator
    SU1048048A2|1983-10-15|Apparatus for dynamic probing of soil
    JP3015418U|1995-09-05|Impact test device using elastic rubber spring
    US3141328A|1964-07-21|Snag tester
    SU767616A1|1980-09-30|Method for impact compact compression tests of materials
    SU355539A1|DEVICE FOR MEASURING HARDNESS BY ELASTIC RETURN METHOD
    RU100259U1|2010-12-10|PARTICLE TEST DEVICE FOR SLICING
    SU1255682A2|1986-09-07|Apparatus for dynamic penetration of soil
    SU106919A1|1956-11-30|A device for determining the strength of concrete and other similar materials.
    RU25762U1|2002-10-20|DEVICE FOR MEASURING ROCK STRENGTH
    同族专利:
    公开号 | 公开日
    ES451200A1|1977-09-16|
    DE2638261C2|1987-09-03|
    DK138862C|1979-04-23|
    CA1076388A|1980-04-29|
    SE420132B|1981-09-14|
    JPS5230489A|1977-03-08|
    DK394375A|1977-03-04|
    FR2323140B1|1982-11-19|
    GB1553311A|1979-09-26|
    SE7609692L|1977-03-04|
    DE2638261A1|1977-03-10|
    FR2323140A1|1977-04-01|
    DK138862B|1978-11-06|
    JPS5917778B2|1984-04-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1708262A|1927-02-25|1929-04-09|Executor Lou Bradshaw|Hardness-testing device|
    GB1092038A|1965-05-05|1967-11-22|Zavoid Za Str Konstrukzii|Improved non-destructive hardness testing device|
    US3421364A|1965-08-04|1969-01-14|Gkn Group Services Ltd|Methods of and apparatus for measuring the hardness of materials|US4343179A|1979-11-27|1982-08-10|Astroem Goeta L|Utility pole hardness tester|
    DE3501841C2|1985-01-22|1994-04-14|Kamm Willibald F G Dipl Ing|Method and device for determining the internal condition of trees or wooden components|
    JPS61186541A|1985-02-08|1986-08-20|Murata Machinery Ltd|Spun yarn|
    JPS63192476U|1987-05-28|1988-12-12|
    US5099682A|1990-03-12|1992-03-31|Denomme Catherine E|Meat doneness tester|
    FR2707759B1|1993-07-13|1995-09-01|Sandoz Jean Luc|Method and apparatus for monitoring the state of deterioration of wooden structures, in particular posts.|
    EP0738703B1|1995-02-28|2002-05-22|Nippon Shokubai Co., Ltd.|Acrylic acid derivatives, method for preparing the acrylic acid derivatives, and acrylic acid polymers|
    JP2010271112A|2009-05-20|2010-12-02|Yoshihisa Fujii|Method for evaluating strength of wood and woody material|
    US8210024B2|2009-10-16|2012-07-03|The Boeing Company|Damage impactor|
    DE102011018971A1|2011-04-28|2012-10-31|Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.|Device for determining transverse tensile strength of timber material product e.g. oriented strand board-plate, has energy storage loading penetrator with force, and display device displaying penetration depth of penetrator into product|
    DE102011107899A1|2011-07-18|2013-01-24|Carl Scholl Gmbh|Method for classification of round timber with wood moisture measuring device for masts, particularly for line construction, involves introducing pin, particularly metal pin with predetermined penetration depth into round timber|
    ES2606331B2|2016-11-15|2017-07-25|Universidad Politécnica de Madrid|Portable machine and procedure to perform soft impact tests, with large load application area, on fragile materials|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DK394375A|DK138862C|1975-09-03|1975-09-03|
    [返回顶部]