CN109895226A - Indoor building experiment standard test piece forming die - Google Patents

Indoor building experiment standard test piece forming die Download PDF

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Publication number
CN109895226A
CN109895226A CN201711305670.4A CN201711305670A CN109895226A CN 109895226 A CN109895226 A CN 109895226A CN 201711305670 A CN201711305670 A CN 201711305670A CN 109895226 A CN109895226 A CN 109895226A
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China
Prior art keywords
level
bottom plate
punch
column
pin
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Granted
Application number
CN201711305670.4A
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Chinese (zh)
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CN109895226B (en
Inventor
李芳�
刘潇
张传松
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Cubic Tongda Tianjin Experimental Instrument Co ltd
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Lifang Tongda Industrial Tianjin Co ltd
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Publication of CN109895226A publication Critical patent/CN109895226A/en
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Publication of CN109895226B publication Critical patent/CN109895226B/en
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Abstract

The invention discloses an indoor civil experiment standard test piece forming die, which comprises a primary bottom plate, wherein the lower surface of the primary bottom plate is rotatably connected with a plurality of insert posts, a plurality of fixing holes and a plurality of primary positioning holes are formed in the primary bottom plate, a male die comprises a secondary bottom plate, a plurality of thread hole groups are formed in the secondary bottom plate, male die posts are meshed with threads in the thread holes, the lower ends of the male die posts are connected with male die heads, slots are formed in the centers of the upper ends of the male die posts, the upper ends of two male die posts meshed with threads in each thread hole group are meshed with a driving wheel, a plurality of primary positioning posts are arranged on the secondary bottom plate, a plurality of secondary positioning holes are formed in the secondary bottom plate, a female die comprises a tertiary bottom plate, a plurality of female die holes are formed in the tertiary bottom plate, a female die cylinder is connected below the female die holes.

Description

A kind of interior building experimental standard specimen molding mold
Technical field
The present invention relates to indoor technical field of civil engineering, and in particular to a kind of interior building experimental standard specimen molding mould Tool.
Background technique
Some geotechnical engineerings need to sample live Rock And Soil after geologic survey, indoor building experiment are carried out, to original state Soil test or manipulated soil is made using original state soil particle being tested, and the result of test is used to provide ginseng for engineering design Number, the test result of manipulated soil accurately whether depend on the molding uniformity of standard specimen, the test result of analog material is accurate Whether be similarly dependent on the molding uniformity of standard specimen, solve the problems, such as that compactness just solves asking for standard specimen uniformity Topic, in addition, to make experimental result have comparativity, it is also necessary to the energy a certain number of test specimens of one-pass molding, that is, efficiency problem, The patent of Publication No. CN203738973U discloses a kind of building experimental standard specimen molding composable mold, and test specimen quantity can 4,6,8 test specimens of one-pass molding are realized in control, meet different experimental project needs, form standard, same batch test specimen mechanical property Energy uniformity is good, but has a disadvantage in that, punch-pin pressure head is fixedly connected in threaded hole, and length is fixed, and is only applicable to molding one The molding specification of the test specimen of kind of specification, different material is different, can only more mold exchange carry out processing and forming, in addition, one-time formed Multiple test specimens be unified specification, carry out building experiment gradient test when, can not one-pass molding difference gradient test specimen, to room The use of interior civil engineering test causes limitation.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of unified specifications for being not only suitable for different material Specimen molding once same material can be carried out again different gradients specimen molding indoor building experimental standard test specimen Molding die.The present invention solves its technical problem and adopts the following technical solutions to achieve:
A kind of interior building experimental standard specimen molding mold, including the pressing mold, punch-pin, cavity plate from top to bottom set gradually And hopper, the pressing mold include level-one bottom plate, the level-one lower surface of base plate is rotatably connected to several is driven by level-one driving motor Dynamic inserting column, the level-one plate upper surface are provided with synchronous drive mechanism, offer several fixation holes on the level-one bottom plate With several level-one location holes, the punch-pin includes second level bottom plate, and several threaded hole groups, Mei Gesuo are offered on the second level bottom plate Stating threaded hole group includes two threaded holes that front and back is arranged, and the threaded hole internal screw thread is engaged with punch-pin column, under the punch-pin column End is connected with punch-pin head, offers slot at the punch-pin column upper end center, and the two of each threaded hole group internal screw thread engagement A punch-pin column upper end is engaged with a driving wheel, and the driving wheel is rotationally connected on the second level pedestal and is driven by second level Motor driven is moved, is provided with several level-one positioning columns on the second level bottom plate, it is fixed that several second levels are offered on the second level bottom plate Position hole, the cavity plate includes three-level bottom plate, and several die holes are offered on the three-level bottom plate, are connected under the die hole recessed Mould cylinder is provided with several two-stage positioning columns on the three-level bottom plate, and the level-one positioning column is inserted in the level-one positioning hole, The two-stage positioning column is inserted in the two-stage positioning hole, and the punch-pin column is inserted in the cavity plate cylinder, and the inserting column is inserted In the slot.
In above-mentioned indoor building experimental standard specimen molding mold, further, if the synchronous drive mechanism includes Dry driven wheel, the inserting column upper end pass through the level-one bottom plate and connect the driven wheel, and level-one plate upper surface side turns Dynamic to be connected with directive wheel, the other side is rotatably connected to driving wheel, and the driving wheel, the driven wheel and the directive wheel pass through chain Item transmission connection, the output axis connection of the driving wheel and the level-one driving motor, the level-one driving motor is vertically downward It is set to pressing plate lower surface, the pressing plate quadrangle is set to right above the level-one bottom plate by pillar.
In above-mentioned indoor building experimental standard specimen molding mold, further, the secondary drive motor vertically to Under be set to top plate lower surface, right above the top plate quadrangle is removably connected in the middle part of the second level bottom plate by pillar, institute It states cover top surface and is provided with several pillars, the pillar is inserted in the fixation hole and is fixed by fixture nut.
In above-mentioned indoor building experimental standard specimen molding mold, further, the fixation hole at least two, if In the pillar connected in the level-one bottom plate on both sides of the middle, position, quantity and the diameter and the top plate of the fixation hole Position, quantity and diameter be adapted, the quantity of the level-one location hole is at least four, uniformly be set to the level-one bottom plate four Angle, position, quantity and the diameter of the level-one location hole are adapted with position, quantity and the diameter of the level-one positioning column, institute It states two-stage positioning hole and is at least four, be uniformly set to second level bottom plate quadrangle, the position in the two-stage positioning hole, quantity and straight Diameter is adapted with position, quantity and the diameter of the two-stage positioning column.
In above-mentioned indoor building experimental standard specimen molding mold, further, the slot section is square, institute Stating inserting column section is square compatible with the slot, and the length of the inserting column is greater than the top plate and the second level bottom plate Between vertical range, the depth of the slot is consistent with the length of the punch-pin column.
In above-mentioned indoor building experimental standard specimen molding mold, further, the length of the punch-pin column is not less than The length of the cavity plate cylinder, the diameter of the punch-pin head are greater than the diameter of the punch-pin column, the diameter of the punch-pin head with it is described The internal diameter of cavity plate cylinder is adapted.
In above-mentioned indoor building experimental standard specimen molding mold, further, the punch-pin column is arranged in matrix form, The quantity and position of the inserting column and the cavity plate cylinder are adapted with the quantity of the punch-pin column and position.
In above-mentioned indoor building experimental standard specimen molding mold, further, the cavity plate cylinder is both ends open Hollow cylinder structure, the cavity plate cylinder lower end periphery are equipped with cutting edge, and the hopper is open-topped rectangular box.
The advantages and positive effects of the present invention are:
1. the square inserting column that the present invention is arranged can be inserted into slot, drive inserting column rotation can be same by level-one driving motor Step drives the rotation of punch-pin column, punch-pin column can threadingly hole synchronization lifting, if height of specimen required by tested material is larger, Then punch-pin column is synchronized and is moved up, if height of specimen required by tested material is smaller, punch-pin column is synchronized and is moved down, is suitable for The specimen molding of the unified specification of different material, while can also guarantee unified with a batch of test specimen mechanical property;
2. the present invention is provided with several threaded hole groups, two punch-pin column upper ends and one of each threaded hole group internal screw thread engagement A driving wheel engagement, driving wheel is by secondary drive motor driven, two punch-pin column liftings of synchronous drive, different driving wheel difference Two punch-pin column liftings are driven, makes the extension elongation of punch-pin column in staged, different gradients can be carried out to same material Specimen molding, while can also guarantee unified with a batch of test specimen mechanical property;
Level-one positioning column and level-one location hole that 3. the present invention was arranged be used cooperatively, pressing mold and punch-pin are advantageously ensured that Precise positioning and stability, two-stage positioning column and two-stage positioning hole are conducive to the precise positioning and stability of punch-pin and cavity plate.
Detailed description of the invention
Technical solution of the present invention is described in further detail below with reference to drawings and examples, but should Know, these attached drawings are designed for task of explanation, therefore not as the restriction of the scope of the invention.In addition, except non-specifically It points out, these attached drawings are meant only to conceptually illustrate structure construction described herein, without to be drawn to scale.
Fig. 1 is structural schematic diagram of the invention;
Fig. 2 is the structural schematic diagram in the direction pressing mold A-A in the present invention;
Fig. 3 is the structural schematic diagram in the direction convex mould B-B of the present invention;
Fig. 4 is the structural schematic diagram in the direction cavity plate C-C in the present invention.
In figure:
1. pressing mold, 2. punch-pin, 3. cavity plates, 4. hoppers, 5. level-one bottom plates, 6. inserting columns, 7. driven wheels, 8. directive wheels, 9. pass Driving wheel, 10. chains, 11. level-one driving motors, 12. pressing plates, 13. pillars, 14. fixation holes, 15. second level bottom plates, 16. threaded holes, 17. punch-pin column, 18. punch-pin heads, 19. slots, 20. driving wheels, 21. secondary drive motors, 22. top plates, 23. level-one positioning columns, 24. two-stage positioning hole, 25. fixture nuts, 26. three-level bottom plates, 27. two-stage positioning columns, 28. die holes, 29. cavity plate cylinders, 30. 1 Grade location hole.
Specific embodiment
Firstly, it is necessary to which explanation, illustrates indoor building experimental standard of the invention for by way of example below Specific structure, features and advantages of specimen molding mold etc., however what all descriptions were intended merely to be illustrated, without should will It is interpreted as forming any restrictions to the present invention.In addition, being described by or implying any in each embodiment mentioned by this paper Single technical characteristic, or shown or implicit any single technical characteristic in the drawings, still can be in these technologies spy Continue any combination between sign (or its equivalent) or delete, to obtain this hair that may do not referred to directly herein Bright more other embodiments.For the sake of simplifying drawing, same or like technical characteristic in the same figure may be only It is indicated at one.
In the description of the present invention, it should be noted that the term " side of the instructions such as preceding, " rear ", "upper", "lower", "center" Position or positional relationship are to be based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description of the present invention and simplification of the description, Rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, because This is not considered as limiting the invention, in addition, term " level-one ", " second level ", " three-level " are used for description purposes only, and cannot It is interpreted as indication or suggestion relative importance or implicitly indicates the quantity of indicated technical characteristic.
Now in conjunction with attached drawing, the present invention is described in further detail, and these attached drawings are simplified schematic diagram, only to show Meaning mode illustrates basic structure of the invention, therefore it only shows the composition relevant to the invention.
As Figure 1-Figure 4, a kind of indoor building experimental standard specimen molding mold, including what is from top to bottom set gradually Pressing mold 1, punch-pin 2, cavity plate 3 and hopper 4, pressing mold 1 include level-one bottom plate 5, and 5 lower surface of level-one bottom plate is rotatably connected to several by one The inserting column 6 that grade driving motor 11 drives, 5 upper surface of level-one bottom plate is provided with synchronous drive mechanism, if offering on level-one bottom plate 5 Dry fixation hole 14 and several level-one location holes 30, punch-pin 2 include second level bottom plate 15, offer several threaded holes on second level bottom plate 15 Group, each threaded hole group include two threaded holes 16 that front and back is arranged, and 16 internal screw thread of threaded hole is engaged with punch-pin column 17, punch-pin column 17 lower ends are connected with punch-pin head 18, and slot 19 is offered at 17 upper end center of punch-pin column, each threaded hole group internal screw thread engagement Two 17 upper ends of punch-pin column are engaged with a driving wheel 20, and driving wheel 20 is rotationally connected on second level pedestal 15 and by secondary drive Motor 21 drives, and is provided with several level-one positioning columns 23 on second level bottom plate 15, offers several two-stage positionings on second level bottom plate 15 Hole 30, cavity plate 3 include three-level bottom plate 26, offer several die holes 28 on three-level bottom plate 26, are connected with cavity plate under die hole 28 Cylinder 29 is provided with several two-stage positioning columns 27 on three-level bottom plate 26, and level-one positioning column 23 is inserted in level-one location hole 30, second level Positioning column 27 is inserted in two-stage positioning hole 24, and punch-pin column 17 is inserted in cavity plate cylinder 29, and inserting column 6 is inserted in slot 19.
Synchronous drive mechanism includes several driven wheels 7, and 6 upper end of inserting column passes through level-one bottom plate 5 and connects driven wheel 7, level-one bottom 5 upper surface side of plate is rotatably connected to directive wheel 8, and the other side is rotatably connected to driving wheel 9, driving wheel 9, driven wheel 7 and guiding Wheel 8 is sequentially connected by chain 10, the output axis connection of driving wheel 9 and level-one driving motor 11, and level-one driving motor 11 is vertical It is down-set in 12 lower surface of pressing plate, 12 4 jiaos of pressing plate are set to right above level-one bottom plate 5 by pillar 13, secondary drive motor 21 are set to 22 lower surface of top plate vertically downward, and 22 4 jiaos of top plate are being removably connected to 15 middle part of second level bottom plate just by pillar 13 Top, 22 upper surface of top plate are provided with several pillars 13, and pillar 13 is inserted in fixation hole 14 and is fixed by fixture nut 25, Gu Determine hole 14 at least two, is set to 5 on both sides of the middle of level-one bottom plate, connects on position, quantity and the diameter and top plate 22 of fixation hole 14 Position, quantity and the diameter of the pillar 13 connect are adapted, and the quantity of level-one location hole 30 is at least four, are uniformly set to level-one bottom 5 four jiaos of plate, position, quantity and the diameter of level-one location hole 30 are adapted with the position of level-one positioning column 23, quantity and diameter, and two Grade location hole 24 is at least four, is uniformly set to 15 4 jiaos of second level bottom plate, position, quantity and the diameter in two-stage positioning hole 27 and two Position, quantity and the diameter of grade positioning column 27 are adapted, and 19 section of slot is square, and 6 section of inserting column is suitable with 19 phase of slot The square matched, the length of inserting column 6 are greater than the vertical range between top plate 22 and second level bottom plate 15, the depth and punch-pin of slot 19 The length of column 17 is consistent, and the length of punch-pin column 17 is not less than the length of cavity plate cylinder 29, and the diameter of punch-pin head 18 is greater than punch-pin column 17 Diameter, the diameter of punch-pin head 18 is adapted with the internal diameter of cavity plate cylinder 29, and punch-pin column 17 is arranged in matrix form, inserting column 6 and cavity plate The quantity of cylinder 29 and position are adapted with the quantity of punch-pin column 17 and position, and cavity plate cylinder 29 is the hollow cylinder knot of both ends open Structure, 29 lower end periphery of cavity plate cylinder are equipped with cutting edge, and hopper 4 is open-topped rectangular box.
Specific work process are as follows: tested material is placed in hopper 4, when need to carry out the unified specification of different material at When type, according to material variety, the extended length of punch-pin column 17 is adjusted, specific adjusting method is that will be equipped with secondary drive motor Pressing mold 1 is installed on punch-pin 2, the level-one positioning column 23 on second level bottom plate 15 by 21 top plate 22 by unloading on second level bottom plate 15 It is passed through by level-one location hole 30, inserting column 6 is inserted in slot 19, with fixed, the starting one by pressing mold 1 and punch-pin 2 of fixture nut 25 Grade driving motor 11, drives driving wheel 9 to rotate, and the driven wheel 7 and directive wheel 8 being sequentially connected with driving wheel 9 rotate, driven wheel 7 Inserting column 6 is driven to rotate, since inserting column 6 and slot 19 are square, the rotation of inserting column 6 can drive punch-pin column 17 to turn therewith Dynamic, punch-pin column 17 can threadingly be gone up and down in hole 16, if tested material requires height of specimen larger, punch-pin column 17 is moved up, If tested material requires height of specimen smaller, punch-pin column 17 is moved down, when need to carry out the different gradients of same material at When type, pressing mold 1 is removed, the top plate 22 for being equipped with secondary drive motor 21 is installed on second level bottom plate 15, by secondary drive The output shaft of motor 21 is connect with driving wheel 20, and starting secondary drive motor 21 in interval drives driving wheel 20 to rotate respectively, and one Driving wheel 20 drives two punch-pin columns 17 engaged to rotate synchronously, and can make the extended length of punch-pin column 17 is in staged, The punch-pin column 17 of same extended length is two, will be convex after the completion of adjusting to the extended length of punch-pin column 17 as parallel test Mould 2 is installed on cavity plate 3, and two-stage positioning column 27 is passed through by two-stage positioning hole 30, and punch-pin column 17 is inserted by die hole 28, using pressure Power machine or other loading mechanisms directly press, and carry out the processes such as die-filling and depanning.
It should be noted that unless otherwise clearly defined and limited, the setting, connection type in the present invention are using existing The conventional means such as mature bolt, rivet, welding in technology, being detachably connected equally using in the prior art in the present invention Conventional means, details are not described herein, but will not influence the repetition of those skilled in the art due to the above reasons,.
The square inserting column of the present embodiment setting can be inserted into slot, drive inserting column rotation can be same by level-one driving motor Step drives the rotation of punch-pin column, punch-pin column can threadingly hole synchronization lifting, the test specimen of the unified specification suitable for different material at Type is provided with several threaded hole groups, and two punch-pin column upper ends of each threaded hole group internal screw thread engagement are engaged with a driving wheel, Different driving wheels drives two punch-pin column liftings respectively, makes the extension elongation of punch-pin column in staged, can be to same object Material carries out the specimen molding of different gradients, while can also guarantee unified with a batch of test specimen mechanical property.
Above embodiments describe the invention in detail, but content is only the preferred embodiment of the present invention, no It can be believed to be used to limit the scope of the invention.Any changes and modifications in accordance with the scope of the present application, It should still fall within the scope of the patent of the present invention.

Claims (8)

1. a kind of interior building experimental standard specimen molding mold, including from top to bottom set gradually pressing mold, punch-pin, cavity plate and Hopper, it is characterised in that: the pressing mold includes level-one bottom plate, and the level-one lower surface of base plate is rotatably connected to several is driven by level-one Motor-driven inserting column is moved, the level-one plate upper surface is provided with synchronous drive mechanism, if offering on the level-one bottom plate Dry fixation hole and several level-one location holes, the punch-pin include second level bottom plate, offer several threaded holes on the second level bottom plate Group, each threaded hole group include two threaded holes that front and back is arranged, and the threaded hole internal screw thread is engaged with punch-pin column, described Punch-pin column lower end is connected with punch-pin head, and slot, each threaded hole group internal screw thread are offered at the punch-pin column upper end center Two punch-pin column upper ends of engagement are engaged with a driving wheel, and the driving wheel is rotationally connected on the second level pedestal simultaneously By secondary drive motor driven, several level-one positioning columns are provided on the second level bottom plate, if offering on the second level bottom plate Dry two-stage positioning hole, the cavity plate include three-level bottom plate, offer several die holes on the three-level bottom plate, under the die hole It is connected with cavity plate cylinder, several two-stage positioning columns are provided on the three-level bottom plate, the level-one positioning column is inserted in the level-one Positioning hole, the two-stage positioning column are inserted in the two-stage positioning hole, and the punch-pin column is inserted in the cavity plate cylinder, institute Inserting column is stated to be inserted in the slot.
2. a kind of indoor building experimental standard specimen molding mold according to claim 1, it is characterised in that: the synchronization Driving mechanism includes several driven wheels, and the inserting column upper end passes through the level-one bottom plate and connects the driven wheel, the level-one bottom Plate upper surface side is rotatably connected to directive wheel, and the other side is rotatably connected to driving wheel, the driving wheel, the driven wheel and institute It states directive wheel to connect by chain drive, the output axis connection of the driving wheel and the level-one driving motor, the level-one is driven Dynamic motor is set to pressing plate lower surface vertically downward, and the pressing plate quadrangle is set to right above the level-one bottom plate by pillar.
3. a kind of indoor building experimental standard specimen molding mold according to claim 1, it is characterised in that: the second level Driving motor is set to top plate lower surface vertically downward, and the top plate quadrangle is removably connected to the second level bottom plate by pillar Right above middle part, the cover top surface is provided with several pillars, and the pillar is inserted in the fixation hole and by fixed spiral shell Mother is fixed.
4. a kind of indoor building experimental standard specimen molding mold according to claim 3, it is characterised in that: the fixation Hole at least two, in the level-one bottom plate on both sides of the middle, position, quantity and the diameter and the top plate of the fixation hole Position, quantity and the diameter of the pillar of connection are adapted, and the quantity of the level-one location hole is at least four, is uniformly set to Level-one bottom plate quadrangle, the position of position, quantity and the diameter of the level-one location hole and the level-one positioning column, quantity and Diameter is adapted, and the two-stage positioning hole is at least four, is uniformly set to second level bottom plate quadrangle, the two-stage positioning hole Position, quantity and diameter are adapted with position, quantity and the diameter of the two-stage positioning column.
5. a kind of indoor building experimental standard specimen molding mold according to claim 4, it is characterised in that: the slot Section is square, and the inserting column section is square compatible with the slot, and the length of the inserting column is greater than the top Vertical range between plate and the second level bottom plate, the depth of the slot are consistent with the length of the punch-pin column.
6. a kind of indoor building experimental standard specimen molding mold according to claim 1, it is characterised in that: the punch-pin The length of column is not less than the length of the cavity plate cylinder, and the diameter of the punch-pin head is greater than the diameter of the punch-pin column, the punch-pin The diameter of head is adapted with the internal diameter of the cavity plate cylinder.
7. a kind of indoor building experimental standard specimen molding mold according to claim 1, it is characterised in that: the punch-pin Column is arranged in matrix form, and quantity and position and the quantity of the punch-pin column and position of the inserting column and the cavity plate cylinder are mutually fitted Match.
8. a kind of indoor building experimental standard specimen molding mold according to claim 1, it is characterised in that: the cavity plate Cylinder is the hollow cylinder structure of both ends open, and the cavity plate cylinder lower end periphery is equipped with cutting edge, and the hopper is open-topped square Shape cabinet.
CN201711305670.4A 2017-12-11 2017-12-11 Indoor building experiment standard test piece forming die Active CN109895226B (en)

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Application Number Priority Date Filing Date Title
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CN109895226B CN109895226B (en) 2021-05-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112461623A (en) * 2020-11-13 2021-03-09 山东建筑大学 Test device and method capable of preparing multiple test pieces in batch

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102139310A (en) * 2010-11-19 2011-08-03 无锡曙光模具有限公司 Adjustable punch head structure
CN203738973U (en) * 2014-03-26 2014-07-30 青岛科技大学 Combined die for molding standard test piece for geotechnical test
CN203887018U (en) * 2014-05-26 2014-10-22 滁州市精华模具制造有限公司 Punch-adjustable punching die

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102139310A (en) * 2010-11-19 2011-08-03 无锡曙光模具有限公司 Adjustable punch head structure
CN203738973U (en) * 2014-03-26 2014-07-30 青岛科技大学 Combined die for molding standard test piece for geotechnical test
CN203887018U (en) * 2014-05-26 2014-10-22 滁州市精华模具制造有限公司 Punch-adjustable punching die

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112461623A (en) * 2020-11-13 2021-03-09 山东建筑大学 Test device and method capable of preparing multiple test pieces in batch

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Address after: 301700 No. 19 Wujing Road, Huangzhuang street, Wuqing District, Tianjin

Patentee after: Cubic Tongda (Tianjin) Experimental Instrument Co.,Ltd.

Address before: 300000 535-4, 18 Fuyuan Road, development zone, Wuqing District, Tianjin (centralized office area)

Patentee before: LIFANG TONGDA INDUSTRIAL (TIANJIN) CO.,LTD.