CN108297477B - Press supporting structure - Google Patents
Press supporting structure Download PDFInfo
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- CN108297477B CN108297477B CN201810221701.6A CN201810221701A CN108297477B CN 108297477 B CN108297477 B CN 108297477B CN 201810221701 A CN201810221701 A CN 201810221701A CN 108297477 B CN108297477 B CN 108297477B
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- matrix
- press
- section
- supporting structure
- long shaft
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- 239000011159 matrix material Substances 0.000 claims abstract description 61
- 238000003825 pressing Methods 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims 1
- 125000006850 spacer group Chemical group 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 29
- 230000006835 compression Effects 0.000 abstract description 6
- 238000007906 compression Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 description 13
- 239000010959 steel Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 5
- 239000000758 substrate Substances 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/04—Frames; Guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
Abstract
The invention discloses a press supporting structure, which is a closed annular or ring-like structure, wherein the closed annular or ring-like structure is provided with a long shaft and a short shaft, a press working assembly is arranged in an inner ring of the supporting structure, the expansion direction of a press is coincident with the long shaft, the supporting structure comprises a matrix and a binding layer, the matrix consists of two half matrix blocks which are symmetrically arranged by taking the long shaft as a symmetrical axis, a connecting surface is formed at the joint of the two half matrix blocks, the connecting surface is coplanar with the long shaft, and the binding layer surrounds the outer wall of the outer ring of the matrix. The matrix and the binding layer can be used simultaneously to balance the stress states of the matrix material and the binding material, the characteristic that the material can bear tension and compression simultaneously is fully exerted, the number of the frame components is obviously less than that of the components in the traditional technology, the material use and the cost are reduced to the maximum degree on the basis of ensuring the mechanical property of the structure, and the safety performance of the whole structure is substantially improved.
Description
Technical Field
The invention belongs to the field of structural support, and particularly relates to a press supporting structure.
Background
The press is a press, a hydraulic press and an oil press for short, the press refers to a forming machine for industrial products through pressure forming, the existing combined press used by enterprise production is complex in structure and structure, a plurality of materials are used, in use, a plurality of structural stability problems, especially supporting structures, need to support a pressure device and bear the back pressure of the pressure device, the traditional process mostly adopts steel wires to wind on an outer structure so as to enhance the safety of the supporting structure, and the steel wires, steel belts and the like are bound to serve as binding force structures and need to be wound by a supporting main body. Because the steel wires and the steel belts usually apply pretightening force exceeding nominal force in the traditional design, the supporting main body is always in a pressed state, the inherent tensile property of the supporting main body is not utilized, the materials are seriously wasted, and the safety and the reliability of the integral frame are reduced to a certain extent. The steel wire is wound and slides due to insufficient friction, and the sliding device is simply limited by increasing, so that the tensile force of the steel wire is increased, the steel wire is easy to break, the local force application of the supporting main body is uneven, and the purposes of uniformly pressing and improving the overall mechanical property of the supporting structure cannot be achieved.
The present invention has been made in view of this.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provide a press supporting structure, and simultaneously use a matrix and a binding layer to optimally balance the stress states of the matrix material and the binding material, fully exert the characteristic that the materials can simultaneously bear tension and compression, obviously reduce the number of components in the prior art, furthest reduce the use and cost of the materials on the basis of ensuring the mechanical property of the structure, and substantially increase the safety performance of the whole structure.
In order to solve the technical problems, the basic conception of the technical scheme adopted by the invention is as follows:
the press supporting structure is a closed annular or ring-like structure, the closed annular or ring-like structure is provided with a long shaft and a short shaft, a press working assembly is arranged in an inner ring of the supporting structure, the telescopic direction of the press coincides with the long shaft, the supporting structure comprises a matrix and a binding layer, the matrix is composed of two half matrix blocks which are symmetrically arranged or basically symmetrically arranged by taking the long shaft as a symmetrical axis, a connecting surface is formed at the joint of the two half matrix blocks, the connecting surface is coplanar with the long shaft, and the binding layer surrounds the outer wall of the outer ring of the matrix to exert pretightening force under the prepressing state:
σ 1f A f ＝ηF/2
wherein sigma 1f Is the average compressive stress in the section of the semi-matrix block, A f The cross-sectional area of the matrix half block is F, the nominal pressure of the press, and eta is the precompression coefficient.
Further, wherein, eta is more than or equal to 0.1 and less than or equal to 0.9.
Further, let sigma 1f Equal to the allowable compressive stress [ sigma ]]The minimum cross section of the semi-matrix block is: a is that f ＝ηF/2[σ]。
Further, the semi-matrix block comprises a main body section and two elbow sections, wherein the two elbow sections are symmetrically connected to two ends of the main body section, and the elbow sections of the two semi-matrix blocks are mutually connected.
Further, the main body section is connected with the elbow section through a connecting assembly, the connecting assembly comprises a cushion block and a mounting screw, and the main body section and the elbow section are respectively provided with a mounting screw hole.
Further, the end of the elbow section forming the connecting surface is provided with a pin hole, and the two half base body blocks are positioned or limited to long axial displacement by a pin bolt arranged in the pin hole.
Further, the basal body is provided with a groove along the periphery of the outer ring surface, and the binding layer is bound in the groove and is not higher than the edge opening of the groove.
Further, the matrix is hollow in whole or in part.
Further, one main body section and two elbow sections of the half matrix block are of an integrated structure.
Further, the connecting surface is a plane, a piecewise continuous curved surface or a smooth curved surface.
Further, the support structure also includes a support mount mounted on one of the base half blocks.
Further, the width of the bottom surface of the groove is consistent with the width of the groove opening, the width of the binding layer is consistent with the width of the bottom surface of the groove, and the binding layer is a binding steel wire.
Further, the bottom surface of the groove is a smooth or piecewise smooth curved surface.
By adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects.
The invention adopts a binding connection mechanism, the pre-stress pressure of the binding layer on the supporting mechanism can be designed into any reasonable value according to the design requirement, and the pre-stress binding force can be set into a proper value according to the structural shape, the material characteristics and the like so as to ensure that: 1) The maximum compressive stress of the framework structure is smaller than the allowable compressive stress limit value in the pre-pressed state, and 2) the framework structure bears the tensile stress in the working state, and the maximum tensile stress is in the allowable range, so that the binding force is not required to be larger than the nominal pressure of the press to ensure that the upright post part and the top beam are not separated in the working state as in the conventional technology.
The matrix and the binding layer can be used simultaneously to balance the stress states of the matrix material and the binding material, the characteristic that the material can bear tension and compression simultaneously is fully exerted, the number of the frame components is obviously less than that of the components in the traditional technology, the material use and the cost are reduced to the maximum degree on the basis of ensuring the mechanical property of the structure, and the safety performance of the whole structure is substantially improved.
In the structure of the invention, as the base material and the binding material bear the working load at the same time, and one of the base material and the binding material is completely broken and destroyed, the other can still bear the whole load, and the binding structure can ensure the safety of the frame structure to the maximum extent, has reasonable structure, is convenient to realize, has strong practicability and is suitable for popularization and application.
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention, without limitation to the invention. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort. In the drawings:
FIG. 1 is a schematic diagram of a prior art matrix subjected to stress in a press operating state;
FIG. 2 is a diagram showing the stress of the substrate in a pre-pressed state according to the present invention;
FIG. 3 is a schematic diagram showing the force applied to a substrate in the working state of a press according to the present invention;
FIG. 4 is a schematic diagram of a first embodiment of the present invention;
FIG. 5 is a schematic diagram of a second embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of an embodiment 1-1 of the present invention.
In the figure: 1-a substrate; 11-a body section; 12-an elbow section; 2-binding layers; a 3-connection assembly; 4-a supporting seat.
It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Examples
As shown in fig. 1 to 6, the press supporting structure according to the present embodiment is a closed annular or ring-like structure, the closed annular or ring-like structure has a long axis and a short axis, the press working assembly is disposed in an inner ring of the supporting structure, and the expansion direction of the press coincides with the long axis, the supporting structure includes a base body and a binding layer, the base body is composed of two half base body blocks symmetrically disposed or substantially symmetrically disposed with the long axis as a symmetry axis, a connection surface is formed at a connection position of the two half base body blocks, the connection surface is coplanar with the long axis, and the binding layer surrounds an outer wall of an outer ring of the base body in a pre-pressing state:
σ 1f A f ＝ηF/2
wherein sigma 1f Is the average compressive stress in the section of the semi-matrix block，A f The cross-sectional area of the matrix half block is F, the nominal pressure of the press, and eta is the precompression coefficient.
Specifically, the supporting structure is a closed annular structure or an annular-like structure, and the name meaning annular or annular-like structure comprises an outer ring and an inner ring, wherein the inner ring is hollow, and working equipment of the press can be installed in the inner ring, such as a power device, a pressing mechanism and the like. Preferably, the outer ring of the support structure is elliptical-like. Further preferably, the longitudinal section of the supporting structure is an olive-like closed ring, the olive-like closed ring is described herein to have a thickness, the shape of the supporting structure is in the shape of an olive-like slice, for convenience in description, hereinafter abbreviated as an olive-like supporting structure, the olive-like supporting structure can provide prestress of arc-like support, and has stronger structural stability, and meanwhile, the inner ring maximally compresses the equipment space, so that the equipment space is reduced, the equipment weight is reduced, and the use of materials is effectively reduced under the condition of meeting the equipment requirement. The two half matrix blocks are in butt joint fit along the long axis, the long axis is symmetrical or basically symmetrical, two connecting surfaces are formed at the joint of the two half matrix blocks, the formed connecting surfaces are planes, sectionally continuous curved surfaces or smooth curved surfaces, the connecting surfaces are preferably planes, the included angle between the long axis of the supporting structure and the connecting surfaces is 0 degrees, namely the planes are coplanar, the press stretches and stretches along the long axis, and the two ends of the long axis of the supporting structure bear tensile force, so that the bending part at the joint of the two half matrix blocks is a main compression part, the two half matrix blocks are buckled along the long axis, the two half matrix blocks are not subjected to force in the separation direction of the two half matrix blocks, namely short axial force, and only the two half matrix blocks are required to be fixed along the long axis.
In the conventional binding technology, since the base body (generally, the upright post and the cross beam, and the whole support structure is generally in a crescent shape) is "locked" together through the binding layers (generally, binding steel wires and bands), as shown in fig. 1, the stress formula is as follows:
σ w A w ＝σ f A f ＝ηF/2 (1)
wherein sigma w Sum sigma f Respectively areAverage tensile and compressive stresses acting in the tie-layer and matrix section, A w And A f The cross-sectional areas of the binding layer and the substrate are expressed, F is the nominal pressure of the press, and eta is the pressure coefficient. The binding force is generally greater than the nominal force, i.e. the pressure coefficient eta > 1, the matrix is still in a pressed state in the working state of the press, and as a result, the strong matrix structure only plays the role of a winding plate and always bears compressive stress, the huge tensile potential of the strong matrix structure is not exerted, correspondingly, the binding layer bears the tensile force exceeding the nominal force in the pre-pressing state, and the binding layer bears the additional tensile force caused by the press force in the working state. That is, only the binding layer material really bears all the work load and does positive work. In this way, the structural performance requirement of the binding layer is much higher, and meanwhile, the matrix structure does not show the tensile performance.
In the present invention, as shown in fig. 2, the resultant force acting on the frame cross section in the pre-compression state is zero, namely:
σ 1w A w ＝σ 1f A f ＝ηF/2
wherein sigma 1w Sum sigma 1f Average tensile and compressive stresses acting in the winding layer and in the base section, respectively, A w And A f Representing the cross-sectional areas of the binding layer and the base member; f is the nominal pressure of the press and eta is the (pre) pressure coefficient. As shown in fig. 3, when the press is in operation, the stress in the matrix will be in a tensile state, and the total stress in the binding layer and the matrix is:
σ w ＝σ 1w +σ 2w
sum sigma f ＝σ 2f -σ 1f
Wherein, eta is more than or equal to 0.1 and less than or equal to 0.9, and is replaced by related design parameter representation:
σ 1f A f ＝ηF/2
let sigma 1f Equal to the allowable compressive stress [ sigma ]]The minimum cross section of the semi-matrix block is:
A f ＝ηF/2[σ] (2)
it should be noted that in the conventional art, the pressure systemThe number eta is required to be greater than 1, and eta=1.2 is usually adopted, wherein eta is less than 1 in the invention, and the comparison of the formulas (1) and (2) shows that the cross-sectional area A of the matrix in the invention f Compared with the traditional structure, the structure of the invention can effectively reduce the use of materials, and simultaneously, the matrix can be used as a tensile member when the press works, thereby reducing the prestress of the binding layer, reducing the stress of the structure and simplifying the structure.
In this embodiment, the base 1 is composed of two halves symmetrically arranged with a long axis as a symmetry axis, the halves include a main body section 11, two elbow sections 12, the two elbow sections 12 are symmetrically connected at two ends of the main body section 11, the elbow sections 12 of the two halves are mutually connected and form a connection surface at the connection position, each half is composed of a main body section 11 and two elbow sections 12, the two elbow sections 12 are symmetrically connected at two ends of the main body section 11, the elbow sections 12 of the two halves are mutually contacted and connected when the two halves are buckled and connected, a connection surface is formed at the connection position, preferably the connection surface is a plane and coplanar with the long axis.
The press working assembly is arranged in an inner ring of the supporting structure, the expansion and contraction direction of the press is coincident with the long shaft, the included angle between the connecting surface and the long shaft is 0 degrees, the two half matrix blocks are combined to form a closed structure frame, the binding layer 2 binds the two half matrix blocks and applies pressure to form a closed structure frame, when the press works, the press stretches along the long shaft, the elbow sections 12 at the two ends of the half matrix blocks are exactly positioned at the two ends of the long shaft, the elbow sections 12 at the two ends of the half matrix blocks bear a considerable part of working load, the stress of the supporting structure is mainly the moving direction of an oil cylinder column, the joint surface of the two half matrix blocks is almost free of external force tending to separate the two half matrix blocks, the requirement that the elbow sections 12 are connected with each other is reduced, the connecting assembly 3 comprises a cushion block, a mounting screw, and the main body section 11 and the elbow sections 12 are respectively provided with a mounting screw hole.
In actual production, the support structure needs to be firmly installed, and the support structure further comprises a support seat 4, wherein the support seat 4 is installed on one of the half matrix blocks. The end that elbow section 12 formed the junction surface is equipped with the pinhole, and two half base member pieces pass through the long axial displacement of cotter restriction, also help the location, interconnect between the elbow section 12 passes through the cotter, because elbow section 12 is very limited in long axial atress, only need guarantee two half base member pieces do not break away from fixed position can, adopt the cotter fixed, simplify the structure promptly and be convenient for assemble again, convenient and practical, the elbow terminal surface also has certain frictional force under the confined state, thereby can reduce many (or be much easier) than traditional technique to connecting piece or mechanism requirement (or design degree of difficulty). The displacement of the two halves on the short axis requires a certain limit, which is in fact already ensured by the binding force. The binding layer 2 of the supporting structure, the base body 1 is provided with a groove along the circumference of the outer ring surface, the binding layer 2 is bound in the groove and is not higher than the edge opening of the groove, the width of the bottom surface of the groove is consistent with the width of the opening of the groove, the width of the binding layer 2 is consistent with the width of the bottom surface of the groove, the binding layer 2 of the circumference of the outer ring of the supporting structure is used for binding, the pre-pressing binding force can be set to a proper value according to the structural shape, the material property and the like to ensure that the framework is in an allowable pressure value in a pre-pressing state, and the tensile stress of the framework in a working state is in an allowable range, and the binding force is not required to be larger than the nominal pressure of a press as in the prior art to ensure that the upright column part and the top beam are not separated in the working state. Preferably, the binding layer 2 is a binding steel wire (steel belt), the bottom surface of the groove is a non-smooth surface, friction force is increased between the binding steel wire and the bottom surface of the groove, stability and structural rigidity of the winding structure are further guaranteed, deformation possibility of the supporting structure is reduced, and stability performance of the supporting structure is guaranteed. Furthermore, the main body section 11 and the elbow section 12 of the base body 1 can be hollow or partially hollow, so that the use of materials is further reduced on the basis of meeting the connection requirement and rigid support.
The invention adopts the binding connection mechanism, the pre-stress pressure of the binding layer 2 on the supporting mechanism can be set to any reasonable value according to the design requirement, the pre-stress binding force can be set to a proper value according to the structural shape, the material characteristics and the like so as to ensure that the skeleton is smaller than the maximum allowable pressure value in the pre-stress state and the tensile stress thereof in the working state is in the allowable range, and the binding force is not required to be larger than the nominal pressure of the press as in the prior art so as to ensure that the upright post part and the top beam are not separated in the working state.
The matrix and the binding layer can be used simultaneously to balance the stress states of the matrix material and the binding material, the characteristic that the material can bear tension and compression simultaneously is fully exerted, the number of the frame components is obviously less than that of the components in the traditional technology, the material use and the cost are reduced to the maximum degree on the basis of ensuring the mechanical property of the structure, and the safety performance of the whole structure is substantially improved.
In the structure of the invention, as the base material and the binding material bear the working load at the same time, and one of the base material and the binding material is completely broken and destroyed, the other can still bear the whole load, and the binding structure can ensure the safety of the frame structure to the maximum extent, has reasonable structure, is convenient to realize, has strong practicability and is suitable for popularization and application.
The foregoing description is only illustrative of the preferred embodiment of the present invention, and is not to be construed as limiting the invention, but is to be construed as limiting the invention to any and all simple modifications, equivalent variations and adaptations of the embodiments described above, which are within the scope of the invention, may be made by those skilled in the art without departing from the scope of the invention.
Claims (8)
1. The press supporting structure is characterized in that the supporting structure is a closed annular or ring-like structure, the closed annular or ring-like structure is provided with a long shaft and a short shaft, a press working assembly is arranged in an inner ring of the supporting structure, the telescopic direction of the press is coincident with the long shaft, the supporting structure comprises a matrix and a binding layer, the matrix is composed of two half matrix blocks which are symmetrically arranged or basically symmetrically arranged by taking the long shaft as a symmetrical axis, a connecting surface is formed at the connecting position of the two half matrix blocks, the connecting surface is coplanar with the long shaft, and the binding layer surrounds the outer wall of the outer ring of the matrix to apply pretightening force, and under the pre-pressing state:
σ 1f A f ＝ηF/2
wherein sigma 1f Is the average compressive stress in the section of the semi-matrix block, A f The cross section area of the semi-matrix block is equal to or more than 0.1 and equal to or less than 0.9, F is the nominal pressure of the press, and eta is the precompression coefficient;
let sigma 1f Equal to the allowable compressive stress [ sigma ]]The minimum cross section of the semi-matrix block is: a is that f ＝ηF/2[σ]。
2. The press support structure of claim 1, wherein the base half block comprises a main body section, two elbow sections symmetrically connected at both ends of the main body section, the elbow sections of the two base half blocks being connected to each other.
3. The press support structure of claim 2, wherein the end of the elbow section forming the connection face is provided with a pin hole, and the two halves are positioned or restrained against displacement in the long axial direction by a pin mounted in the pin hole.
4. The press support structure of claim 2, wherein the body section and the elbow section are connected by a connecting assembly, the connecting assembly comprising a spacer block, mounting screws, and the body section and the elbow section each having mounting screw holes.
5. The press support structure of claim 1, wherein the base is provided with a groove along a circumference of the outer ring surface, and the binding layer is bound in the groove and is not higher than a rim of the groove.
6. The press support structure of claim 1, wherein the matrix is hollow in whole or in part.
7. The press support structure of claim 2, wherein one main body section of the base half block is of unitary construction with two elbow sections.
8. The press support structure of claim 1, wherein the connection surface is planar, piecewise continuous curved, or smooth curved.
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810005642.9A CN108019591A (en) | 2018-01-03 | 2018-01-03 | A kind of structural supporter |
| CN201810221701.6A CN108297477B (en) | 2018-03-18 | 2018-03-18 | Press supporting structure |
| MX2019010193A MX2019010193A (en) | 2018-01-03 | 2018-09-28 | Hydraulic oil press. |
| JP2019569535A JP2020508881A (en) | 2018-01-03 | 2018-09-28 | Hydraulic equipment |
| EP18898809.1A EP3569398B1 (en) | 2018-01-03 | 2018-09-28 | Hydraulic oil press |
| PCT/CN2018/108279 WO2019134408A1 (en) | 2018-01-03 | 2018-09-28 | Hydraulic oil press |
| KR1020207008597A KR102398305B1 (en) | 2018-01-03 | 2018-09-28 | hydraulic system |
| US16/543,538 US11214031B2 (en) | 2018-01-03 | 2019-08-17 | Oil hydraulic press |
| TW108134480A TW202012156A (en) | 2018-01-03 | 2019-09-24 | Oil hydraulic press |
| JP2021047930A JP7052113B2 (en) | 2018-01-03 | 2021-03-22 | Hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810221701.6A CN108297477B (en) | 2018-03-18 | 2018-03-18 | Press supporting structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108297477A CN108297477A (en) | 2018-07-20 |
| CN108297477B true CN108297477B (en) | 2024-03-08 |
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|---|---|---|---|
| CN201810221701.6A Active CN108297477B (en) | 2018-01-03 | 2018-03-18 | Press supporting structure |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108019591A (en) * | 2018-01-03 | 2018-05-11 | 董祥义 | A kind of structural supporter |
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| CN85202445U (en) * | 1985-06-25 | 1986-06-11 | 清华大学 | Prestress steel wire winded loading frame |
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| Publication number | Publication date |
|---|---|
| CN108297477A (en) | 2018-07-20 |
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Effective date of registration: 20190813 Address after: No. 66 Haichuan Road, Jiangbei Hongtang Development Zone, Ningbo City, Zhejiang Province, 315000 Applicant after: NINGBO DEMA INTELLIGENT MACHINERY Co.,Ltd. Address before: 315000 Yucai Road 288, Jiangbei District, Ningbo City, Zhejiang Province Applicant before: Dong Xiangyi |
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