CN112774578B - Forging type cubic hydraulic press - Google Patents
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- CN112774578B CN112774578B CN202110005233.0A CN202110005233A CN112774578B CN 112774578 B CN112774578 B CN 112774578B CN 202110005233 A CN202110005233 A CN 202110005233A CN 112774578 B CN112774578 B CN 112774578B
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- B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
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Abstract
A forging type cubic hydraulic press comprises hinge beam mounting assemblies in six directions, namely an upper direction, a lower direction, a front direction, a rear direction, a left direction and a right direction, wherein each hinge beam mounting assembly comprises a hinge beam body, a piston, a guide sleeve and a rear plug; a rear plug mounting hole which is vertically arranged and used for mounting a rear plug is also formed in the bottom surface of the cylinder body, and a rear plug sealing assembly is arranged between the rear plug and the rear plug mounting hole; during assembly, the guide sleeve is sleeved on the piston and sealed through the guide sleeve sealing assembly. According to the forging type cubic hydraulic press, the hinge beam body, the piston, the guide sleeve, the rear plug and other parts of the hinge beam mounting assembly are structurally improved, a new generation of high-performance superhard material synthetic large-scale cubic hydraulic press is developed, and the technical level of core equipment in the superhard material industry in China is improved.
Description
Technical Field
The invention belongs to the technical field of superhard material synthesis equipment, and particularly relates to a forging type cubic hydraulic press.
Background
It is known that superhard materials are suitable for manufacturing tools for processing other materials, and particularly for processing hard materials, the superhard materials have incomparable superiority and occupy irreplaceable importance, the superhard materials refer to materials with extremely high hardness, which can be divided into natural and artificial materials, and the artificial superhard materials are synthesized, the main equipment is a pull rod type or hinge type cubic hydraulic machine, at present, a hinge type cubic hydraulic machine is mostly used, and the traditional process of the hinge type cubic hydraulic machine is usually a cast cubic hydraulic machine. The hinged cubic hydraulic press generally has six hinged beams, a working cylinder is arranged in each hinged beam, a piston is arranged in each working cylinder, a jack hammer is arranged at the extending end of each piston, a rear plug communicated into each working cylinder is arranged outside each hinged beam, the rear plug is correspondingly communicated with a hydraulic system, namely the piston is driven by the hydraulic system to eject and move, and then the piston drives the jack hammers to perform jacking operation inwards.
The traditional cast cubic hydraulic press has the following 4 outstanding problems: firstly, the size of a synthetic cavity is too small, the production efficiency of the traditional single crystal superhard material is further improved and seriously limited, and the synthesis of a large-size high-end superhard material is restricted; secondly, the cast hinge beam as a pressure-bearing key component has low strength of the whole machine, short service life and frequent fracture accidents in the service process due to the complex shape and difficult avoidance of casting defects; and the traditional cast cubic press has poor machining precision, so that the consumption of the anvil is large. And as the production process changes, the short plates of the cast hinge beam are more prominent when higher performance of the press is required.
In order to improve the overall performance of the cast hinge beam, some researchers carry out intensive systematic research on the casting process of the hinge beam, and try to reduce the incidence rate of casting defects by measures such as changing a pouring system, improving the design of a cavity, increasing the wall thickness of the cast hinge beam and the like, but the casting yield still cannot reach a more ideal level. Meanwhile, even if the hinge beam qualified by casting is obtained, due to the fact that inherent mechanical properties such as fatigue strength and toughness of the casting are poor, accidents such as bottom falling of the cylinder body and breakage of the ear fan are prone to occurring in the using process. At present, some manufacturers in China have tested casting presses with cylinder diameters of 950mm, and when the cylinder diameters are further increased, the cast hinge beams do not meet the requirements of bearing capacity.
The mechanical property of the forged product is generally superior to that of a cast product, and the forged hinge beam has the advantages of light weight, strong bearing capacity, long service life and the like, and can realize large-cavity synthesis. Because the part shape is complicated, forges the degree of difficulty of shaping great, has when adopting traditional freely forging mode production to forge the surplus big, the material utilization is low, the handling capacity is big, with high costs scheduling problem, along with the increase of cylinder body size, the forged degree of difficulty of hinge beam further promotes.
The invention discloses a hinge beam structure of a cubic press (CN 111530377A), which comprises a cylinder body, wherein the cylinder body surface positioned at the outer side is a cylinder body non-connecting surface during assembly, the cylinder body surface positioned at the inner side is a cylinder body connecting surface, two single hinge lugs and two double hinge lugs are arranged on the cylinder body connecting surface, the single hinge lugs and the double hinge lugs are alternately arranged around the circumferential direction, the central connecting line of the two single hinge lugs is vertical to the central connecting line of the two double hinge lugs, connecting pin shaft holes with corresponding positions are arranged on the single hinge lugs and the double hinge lugs, and the size between the two double hinge lugs is matched with the size of the single hinge lugs; the hinge beam structure of the cubic press which is continuously used for more than 50 years is improved creatively on the whole, and the structure of 10 hinge lugs of 2 multiplied by 2 and 3 multiplied by 2 on the periphery of the existing cylinder body is changed into the structural form of 6 hinges of 1 multiplied by 2 and 2 multiplied by 2; the number of the hinge lugs is reduced, the design stress strength is equivalent, only the machining allowance is left for a single hinge lug blank, and the distance between the double hinge lugs is larger. The invention is mainly focused on the structural arrangement of the cylinder body connecting surface of the cubic press, and the structures of the internal hinge beam, the piston and the guide sleeve are not related too much.
The Chinese patent of invention "hinge beam and cubic apparatus press" (publication number: CN211246464U) discloses a hinge beam and cubic apparatus press; the hinge beam comprises a main body part, and a piston cavity is formed in the main body part; a piston capable of moving along the axial direction of the piston cavity is arranged in the piston cavity, the piston comprises a rod body and a base connected with the rod body, the thickness of the base is 315-335 mm, and the axial length of the piston cavity is 550-630 mm; the cubic apparatus press comprises a supporting seat and a plurality of hinge beams, wherein the hinge beams are arranged on the supporting seat. The invention focuses on the structural improvement of hinge lugs and pistons of the hinge beam, avoids the occurrence of head collapse, is beneficial to culturing the single crystal with larger size, and is different from the structural focus of the invention.
Disclosure of Invention
The invention aims to provide a forging type cubic hydraulic press aiming at the defects of the prior art, wherein the diameter of a cylinder body can reach more than 1000mm, and the requirement of large cavity synthesis is met.
In order to solve the technical problems, the invention adopts the technical scheme that:
a forging type cubic hydraulic press comprises hinge beam mounting assemblies in six directions, namely an upper direction, a lower direction, a front direction, a rear direction, a left direction and a right direction, wherein the adjacent hinge beam mounting assemblies are connected through a connecting pin shaft; a rear plug mounting hole which is vertically arranged and used for mounting a rear plug is also formed in the bottom surface of the cylinder body, and a rear plug sealing assembly is arranged between the rear plug and the rear plug mounting hole;
during assembly, the guide sleeve is sleeved on the piston and sealed through the guide sleeve sealing assembly.
The piston comprises a piston head and a piston rod, the piston head is provided with a first wear-resistant belt groove which is circumferentially distributed and two high-pressure sealing grooves which are arranged at intervals, and the first wear-resistant belt groove is positioned between the two high-pressure sealing grooves;
the two side ends of the piston head are in a conical structure and are in arc transition, and the plane of the bottom end of the piston head is provided with a process table groove.
The depth of the process platform groove is set to be 2-5 mm.
The middle part of the guide sleeve is provided with a fixing part which extends along the radial direction and divides the guide sleeve into an upper working section and a lower sealing section along the axial direction, and the outer end surface of the lower sealing section is provided with an outer circle sealing groove which is distributed along the circumferential direction;
an inner circle sealing groove and a second wear-resistant belt groove are formed in the end face of an inner hole of the guide sleeve, and at least 2 second wear-resistant belt grooves are formed in the second wear-resistant belt groove at intervals along the axial direction.
The second wear-resistant belt groove is provided with 4 grooves.
The clearance between the guide sleeve and the piston rod is 0.05-0.15 mm.
The outer end face of the rear plug is provided with a three-stage step-shaped structure, the three-stage step-shaped structure comprises a first stage, a second stage and a third stage, the outer diameters of the first stage, the second stage and the third stage are sequentially reduced from top to bottom, and adjacent step sections are in arc transition;
and the outer end face of the first stage is also provided with high-pressure sealing grooves which are axially arranged at intervals, and a rear blocking sealing assembly is arranged in each high-pressure sealing groove in an assembling process.
The center of the rear plug is provided with an axially-penetrated oil hole, and the upper port and the lower port of the oil hole are provided with buffering steps.
And the guide sleeve sealing assembly arranged in the second wear-resistant belt groove is made of high-pressure composite material.
The roughness Ra of the inner wall of the oil hole is less than or equal to 1.6 mu m.
The invention has the beneficial effects that:
(1) according to the forging type cubic hydraulic press, the hinge beam body, the piston, the guide sleeve, the rear plug and other parts of the hinge beam mounting assembly are structurally improved, a new generation of high-performance superhard material synthesized large-scale cubic hydraulic press is developed, and the technical level of core equipment in the superhard material industry in China is improved;
(2) the hinge beam body adopts a 'non-cylinder structure' that the hinge beam and the working cylinder are combined into a whole, the cylinder beam integrated structure can eliminate the fit clearance of the cylinder beam, the centering performance of the press is greatly improved, and when a working cylinder body is designed, the wall thickness of the cylinder body is increased as much as possible on the premise of meeting the machining requirement, so that the integral rigidity of the press is improved, and after the working cylinder is subjected to the pressure of ultrahigh pressure oil, the bearing capacity of the cylinder body is increased, the safety coefficient is improved, and the service life is prolonged; the bottom surface of the cylinder body is in a large conical surface transition flat bottom shape, the chamfer angles of the conical surface, the cylinder wall and the cylinder bottom are all larger than R50, the strength of parts is ensured, and the lengths of the hinge beam, the working cylinder and the piston are shortened;
(3) the head of the piston is provided with 2 high-pressure sealing grooves and 1 first wear-resistant belt groove, the first wear-resistant belt groove is positioned between the two high-pressure sealing grooves, and the first wear-resistant belt groove not only reduces the clearance between the piston and the cylinder body to 0.02mm, improves the centering performance of the press, but also thoroughly solves the problem of cylinder pulling; a process platform groove is reserved in the center of the bottom of the piston, hydraulic oil pushes the piston to start when the piston returns to the bottom, and the rest parts are completely attached to the corresponding parts of the cylinder bottom, so that the gas content in oil liquid is reduced when the press is assembled and disassembled;
(4) be equipped with interior circle seal groove and second wear-resisting trough of belt on the hole terminal surface of uide bushing, second wear-resisting trough of belt is equipped with 2 at least along axial interval, and the uide bushing is 0.05-0.15mm with the clearance of piston rod, it is too big to avoid the interior circle of uide bushing and piston rod clearance, cause the "head of planting" phenomenon in the operation process, cause serious influence to the precision of whole cubic press, during the assembly, the piston rod is got rid of by the wear-resisting area of setting in multichannel second wear-resisting trough of belt with the clearance of uide bushing, be interference fit form with the piston rod behind the wear-resisting trough of belt installation of second, can guarantee the running accuracy of piston on the one hand, on the other hand can prevent the piston rod fish tail.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a hinge beam mounting assembly;
FIG. 3 is a schematic view of the hinge beam body;
FIG. 4 is a schematic view of the piston structure;
FIG. 5 is a schematic structural view of the guide sleeve;
fig. 6 is a schematic structural diagram of the rear plug.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
The invention provides a forging type cubic hydraulic machine, which is shown in figures 1 to 6.
A forging type cubic hydraulic press comprises hinge beam mounting components 1 in six directions of upper, lower, front, back, left and right, wherein the lower end surface of the lower hinge beam is connected with a fixed base 2, and the adjacent hinge beam mounting assemblies 1 are connected through connecting pin shafts, the hinge beam mounting assemblies 1 respectively comprise hinge beam bodies 2, pistons 3, guide sleeves 4 and rear plugs 5, and the middle part of the hinge beam body 2 is provided with a cylinder body 21 for installing the piston 3, the bottom surface of the cylinder body 21 is a flat-bottom structure and two sides thereof are provided with transitional conical surfaces 22, the chamfers of the conical surfaces 22, the cylinder wall and the cylinder body bottom surface are all larger than R50, the length of the hinge beam body 2, the cylinder body 21 and the piston 3 is shortened while the strength of parts is ensured, a rear plug mounting hole 22 which is vertically arranged and used for mounting a rear plug is also formed in the bottom surface of the cylinder body 21, and a rear plug sealing assembly 6 is arranged between the rear plug 5 and the rear plug mounting hole 22; during assembly, the guide sleeve 4 is sleeved on the piston 3 and sealed through a guide sleeve sealing component.
The piston 3 comprises a piston head 31 and a piston rod 32, the piston head 31 is provided with a first wear-resistant belt groove 311 which is circumferentially distributed and two high-pressure seal grooves 312 which are arranged at intervals, and the first wear-resistant belt groove 311 is positioned between the two high-pressure seal grooves 312; the first wear-resistant belt groove 311 not only reduces the clearance between the piston and the cylinder body to 0.02mm, improves the centering performance of the press, but also thoroughly solves the problem of cylinder pulling.
The two side ends of the piston head 31 are in a conical structure and are in arc transition, and the plane of the bottom end of the piston head is provided with a process table groove 313; the depth of the process table groove 313 is set to be 2-5mm, in the embodiment, the depth of the process table groove is set to be 5mm, oil is stored in the process table groove 313, hydraulic oil can push the piston to start when the piston returns to the bottom, other parts are completely attached to the corresponding parts of the cylinder bottom, and the gas content in oil can be reduced when the press is assembled and disassembled.
The middle part of the guide sleeve 4 is provided with a fixing part 41 which extends along the radial direction, the fixing part 41 divides the guide sleeve 4 into an upper working section 42 and a lower sealing section 43 along the axial direction, and the outer end surface of the lower sealing section 43 is provided with an outer circle sealing groove 431 which is distributed along the circumferential direction; be equipped with interior circle seal groove 44 and second wear-resisting trough of belt 45 on the hole terminal surface of uide bushing 4, and second wear-resisting trough of belt 45 is equipped with 2 at least along axial interval, in this embodiment, second wear-resisting trough of belt 45 is equipped with 4, and interior circle seal groove 44 is equipped with twice.
The clearance between the guide sleeve 4 and the piston rod 32 is 0.05-0.15mm, so that the phenomenon of head falling in the operation process due to the fact that the clearance between the inner circle of the guide sleeve 4 and the piston rod 32 is too large is avoided, the precision of the whole cubic press is seriously influenced, if the phenomenon of head falling is pursued in a sheet mode for centering precision of the cubic press or is prevented, the piston is scratched due to the fact that the clearance between the inner circle of the guide sleeve and the piston rod 32 is too small, and therefore sealing damage, oil leakage and influence on the precision of the press are caused.
During the assembly, the clearance of piston rod 32 and uide bushing 4 is got rid of by the wear-resisting area of setting in 4 second wear-resisting trough of belt 45, is interference fit form with the piston rod after 4 second wear-resisting trough of belt 45 installations, can guarantee the running accuracy of piston on the one hand, and on the other hand can prevent the piston rod fish tail.
The end surface of the inner hole of the guide sleeve 4 is also provided with a guide key groove 46 which is distributed along the axial direction, and the guide key groove 46 is correspondingly matched with the guide key groove on the piston rod 32; and the outermost side of the inner hole of the guide sleeve 4 is also provided with a dustproof sealing groove 47 which is distributed in the circumferential direction.
The outer end face of the rear plug 5 is designed to be a three-stage step-shaped structure, the three-stage step-shaped structure comprises a first stage 51, a second stage 52 and a third stage 53, the outer diameters of the three stages are sequentially decreased from top to bottom, and the adjacent step sections are in circular arc transition, so that stress release under a high-pressure state after the rear plug 5 is assembled with the hinge beam is realized, and the fatigue service life of the rear plug is ensured; the first stage 51 is further provided with high-pressure sealing grooves 511 which are axially arranged at intervals, and a rear plugging sealing assembly 6 is arranged in the high-pressure sealing groove 511 during assembly; the second step section 52 is a high-pressure protection step, and plays a role in assembly positioning and rear block fatigue auxiliary support.
The core of the rear plug 5 is provided with an axially-penetrating oil hole 54, and the upper and lower ports of the oil hole 54 are provided with buffering steps. Specifically, the buffer steps in the first stage 51 include a first high-pressure buffer step 512 at the top and a second-stage buffer step 513 at the inner side, the first high-pressure buffer step 512 performs a stress concentration buffer effect caused by the fluid in the high-pressure state, and the second-stage buffer step 513 performs a stress concentration secondary buffer effect caused by the fluid in the high-pressure state; the buffer steps at the third stage 53 include a second high-pressure buffer step 531 at the inner side and a high-pressure matching step 532 at the near outer side, and the second high-pressure buffer step 531 plays a role in releasing and buffering stress in a high-pressure state; the high-pressure matching step 532 mainly ensures the connection guiding and sealing effects of high-pressure components.
The guide sleeve sealing assembly arranged in the second wear-resistant belt groove 45 is made of high-pressure composite materials, and the effect of sealing the high pressure of the inner cylinder of the hinge beam is achieved.
The oil hole 54 through which the center part of the rear plug 5 axially penetrates is a hydraulic oil channel in the processes of liquid filling, pressure maintaining and overpressure, and the roughness Ra of the inner wall of the oil hole 54 is less than or equal to 1.6 mu m so as to reduce stress concentration and fluid resistance.
This hinge beam of forging formula cubic press adopts the forging formula to make, and hinge beam blank length and width are 2700mm, and hinge beam height is 1100mm, and hinge beam blank weight is not less than 22.5 tons, and finished product weight after the processing is about 15 tons, has realized the blank forging of large-scale hinge beam, has produced the biggest forging hinge beam in China, and the cylinder body diameter of hinge beam body 2 can reach 1000 mm. The hinge beam adopts 45-degree chamfer and circular arc transition of the lug plate 23 and the cylinder bottom, so that the effective connection of the lug plate 23 and the cylinder bottom is enhanced, the integral forging difficulty is reduced, and the integral weight is reduced.
The cylinder body of the hinge beam adopts a 'non-cylinder structure' that the hinge beam and the working cylinder are combined into a whole, the cylinder beam integrated structure can eliminate the fit clearance of the cylinder beam, the centering performance of the press is greatly improved, and when the working cylinder body is designed, the wall thickness of the cylinder body is increased as much as possible on the premise of meeting the machining requirement, so that the integral rigidity of the press is improved, and after the working cylinder is subjected to the pressure of ultrahigh pressure oil, the bearing capacity of the cylinder body is increased, the safety coefficient is improved, and the service life is prolonged.
Where the words "first", "second", etc. are used in this patent to define parts, those skilled in the art will recognize that: the use of "first" and "second" is merely for convenience in describing the invention and to simplify the description, and the words are not intended to have a special meaning.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents.
In the description of the present invention, it is to be understood that the terms "front", "rear", "left", "right", "center", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the scope of the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Claims (9)
1. The utility model provides a forge formula cubic apparatus hydraulic press, includes the hinge roof beam installation component in six positions of upper and lower, preceding, back, left and right, and adjacent hinge roof beam installation component passes through connecting pin hub connection, its characterized in that: the hinge beam mounting assemblies respectively comprise a hinge beam body, a piston, a guide sleeve and a rear plug, a cylinder body for mounting the piston is arranged in the middle of the hinge beam body, the bottom surface of the cylinder body is of a flat-bottom structure, and two sides of the cylinder body are provided with transitional conical surfaces; a rear plug mounting hole which is vertically arranged and used for mounting a rear plug is also formed in the bottom surface of the cylinder body, and a rear plug sealing assembly is arranged between the rear plug and the rear plug mounting hole;
during assembly, the guide sleeve is sleeved on the piston and sealed through the guide sleeve sealing assembly;
the piston comprises a piston head and a piston rod, the piston head is provided with a first wear-resistant belt groove which is circumferentially distributed and two high-pressure sealing grooves which are arranged at intervals, and the first wear-resistant belt groove is positioned between the two high-pressure sealing grooves;
the two side ends of the piston head are in a conical structure and adopt circular arc transition, and the plane of the bottom end of the piston head is provided with a process table groove.
2. A forged cubic hydraulic machine as defined in claim 1, wherein: the depth of the process platform groove is set to be 2-5 mm.
3. A forged cubic hydraulic machine as defined in claim 1, wherein: the middle part of the guide sleeve is provided with a fixing part which extends along the radial direction and divides the guide sleeve into an upper working section and a lower sealing section along the axial direction, and the outer end surface of the lower sealing section is provided with an outer circle sealing groove which is distributed along the circumferential direction;
an inner circle sealing groove and a second wear-resistant belt groove are formed in the end face of an inner hole of the guide sleeve, and at least 2 second wear-resistant belt grooves are formed in the second wear-resistant belt groove at intervals along the axial direction.
4. A forging type cubic hydraulic machine as set forth in claim 3, wherein: the second wear-resistant belt groove is provided with 4 grooves.
5. A forging type cubic hydraulic machine as set forth in claim 3, wherein: the clearance between the guide sleeve and the piston rod is 0.05-0.15 mm.
6. A hydraulic forging press according to any one of claims 1 to 5, wherein: the outer end face of the rear plug is provided with a three-stage step-shaped structure, the three-stage step-shaped structure comprises a first stage, a second stage and a third stage, the outer diameters of the first stage, the second stage and the third stage are sequentially decreased from top to bottom, and the adjacent step sections are in circular arc transition;
and the outer end face of the first stage is also provided with high-pressure sealing grooves which are axially arranged at intervals, and a rear blocking sealing assembly is arranged in each high-pressure sealing groove in an assembling process.
7. A forging type cubic hydraulic machine as set forth in claim 6, wherein: the center of the rear plug is provided with an axially-penetrated oil hole, and the upper port and the lower port of the oil hole are provided with buffering steps.
8. A forging type cubic hydraulic machine as set forth in claim 6, wherein: and a guide sleeve sealing assembly arranged in the second wear-resistant belt groove is made of high-pressure composite material.
9. A forging type cubic hydraulic machine as set forth in claim 7, wherein: the roughness Ra of the inner wall of the oil hole is less than or equal to 1.6 mu m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110005233.0A CN112774578B (en) | 2021-01-05 | 2021-01-05 | Forging type cubic hydraulic press |
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| CN202110005233.0A CN112774578B (en) | 2021-01-05 | 2021-01-05 | Forging type cubic hydraulic press |
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| CN112774578A CN112774578A (en) | 2021-05-11 |
| CN112774578B true CN112774578B (en) | 2022-09-16 |
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| CN117504722B (en) * | 2023-11-16 | 2024-09-10 | 江苏大隆凯科技有限公司 | Forging type hexahedral top press |
| CN117563505B (en) * | 2023-12-13 | 2024-10-01 | 江苏大隆凯科技有限公司 | Six-sided top press capable of synchronously rotating |
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| GB201205743D0 (en) * | 2012-03-30 | 2012-05-16 | Element Six Ltd | Pressure cartridge |
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| CN2738012Y (en) * | 2004-09-18 | 2005-11-02 | 蔡博 | Hinged beam oil cylinder for cubic apparatus diamond press |
| CN201216928Y (en) * | 2008-06-30 | 2009-04-08 | 郑州人造金刚石及制品工程技术研究中心有限公司 | Hexahedron top press hinge beam cylinder |
| CN207313015U (en) * | 2017-11-02 | 2018-05-04 | 柳州市泰如机械有限公司 | A kind of hydraulic jack for prestressed stretch-draw |
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