CN116408376A - Variable pipe diameter bending die for parallel pipe bender and bending forming method thereof - Google Patents
Variable pipe diameter bending die for parallel pipe bender and bending forming method thereof Download PDFInfo
- Publication number
- CN116408376A CN116408376A CN202310455669.9A CN202310455669A CN116408376A CN 116408376 A CN116408376 A CN 116408376A CN 202310455669 A CN202310455669 A CN 202310455669A CN 116408376 A CN116408376 A CN 116408376A
- Authority
- CN
- China
- Prior art keywords
- base plate
- limiting unit
- bending die
- pipe
- movable platform
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005452 bending Methods 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 25
- 230000008602 contraction Effects 0.000 claims abstract description 6
- 239000000758 substrate Substances 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/003—Positioning devices
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention relates to a variable pipe diameter bending die for a parallel pipe bender and a bending forming method thereof, the variable pipe diameter bending die comprises a movable platform, a hydraulic cylinder, a transmission unit, a base plate, a limit unit retainer and a limit unit, wherein the transmission unit and the limit unit are circumferentially arranged on the inner side of the base plate, a lower connecting rod in the transmission unit is connected with the base plate, the lower connecting rod is rotationally connected with an upper connecting rod, the limit unit is rotationally connected with the limit unit retainer, the limit unit retainer is connected with the movable platform, two ends of the hydraulic cylinder are respectively and rigidly connected with the base plate and the movable platform, and a hydraulic rod is positioned on one side of the base plate. The invention designs the bending die with the variable pipe diameter by adopting the principle of the double-slide block mechanism, and realizes the expansion or the contraction of the bending die by the expansion of the hydraulic cylinder, so that the bending die can adapt to pipes with different diameters, and the processing efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of pipe bending and forming, and particularly relates to a variable pipe diameter bending die for a parallel pipe bender and a bending and forming method thereof.
Background
Parallel pipe bending machines are new pipe bending forming devices which appear in recent years, and bending dies are an important component in the parallel pipe bending machines. The bending die is fixed on the movable platform through bolts, the pipe penetrates through a round hole in the middle of the bending die, and bending forming of the pipe is achieved through rotation of the movable platform and limiting of the bending die. Different bending dies can be replaced according to different pipe diameters.
The bending die of the existing parallel pipe bending machine has some defects in the aspect of pipe bending and forming, mainly comprises a fixed pipe diameter, and needs to be replaced according to different processing objects, wherein the replacement of the bending die needs to be manually disassembled, the process is complex, potential safety hazards exist, certain requirements are met for installation, the bending die is difficult to manufacture, and the bending die needs to be stored independently.
According to the problems, the invention provides the variable pipe diameter bending die for the parallel pipe bending machine, which can automatically change the diameter of the bending die, save additional manufacturing process and installation process, improve the adaptability of the bending die to pipes with different diameters and improve the processing efficiency.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides the variable pipe diameter bending die for the parallel pipe bender and the bending forming method thereof, wherein the variable pipe diameter bending die consisting of a base plate, a transmission unit, a limiting unit retainer, a hydraulic cylinder and a movable platform is designed by adopting the principle of a double-slide block mechanism, the base plate is driven and controlled to move back and forth by the hydraulic cylinder to realize the expansion or contraction of the bending die, and simultaneously the self-locking function of the hydraulic cylinder can be utilized to realize the locking of the diameter of the bending die, so that the bending die can flexibly adapt to pipes with different diameters, thereby improving the processing efficiency and reducing the manufacturing cost.
The technical scheme adopted by the invention is that the variable pipe diameter bending die for the parallel pipe bending machine comprises a movable platform, a hydraulic cylinder, a transmission unit, a base plate, a limit unit retainer and a limit unit, wherein the upper part of the movable platform is arranged on the base plate, the movable platform and the base plate are in a circular ring structure, and round holes which can enable pipes to pass through are formed in the middle of the movable platform and the base plate; the limiting unit retainers are arranged between the movable platform and the base plate, the limiting unit retainers comprise retaining columns and retaining rings, the retaining columns are uniformly distributed on the retaining rings around the center of the annular rings, the first ends of the retaining columns are fixedly connected with the movable platform, the second ends of the retaining columns are fixedly connected with the retaining rings, the limiting units are uniformly distributed around the limiting unit retainers, each limiting unit is positioned between the two adjacent retaining columns, the lower end of the bottom end face of each limiting unit is rotationally connected with the retaining rings through a revolute pair, the transmission units are uniformly distributed on the base plate around the central axis of the base plate, each transmission unit comprises a lower connecting rod and an upper connecting rod, the first ends of the lower connecting rods are fixedly connected with the base plate, the second ends of the lower connecting rods are rotationally connected with the first ends of the upper connecting rods through first revolute pairs, and the second ends of the upper connecting rods are rotationally connected with the bottom ends of the limiting units through second revolute pairs; the hydraulic cylinder is arranged between the base plate and the movable platform, the fixed end of the hydraulic cylinder is fixedly connected with the movable platform, the driving end of the hydraulic cylinder is fixedly connected with the base plate, the hydraulic cylinder is driven to stretch and retract to drive the limiting unit to rotate around the retaining ring, and the limiting unit is used for realizing the change of the diameter of the bending die to adapt to the pipes with different pipe diameters through the expansion and contraction of the limiting unit.
Further, when the left side surface of the limiting unit is parallel to the central axis of the substrate, the bending die is in an unfolded state; when the top end face of the limiting unit is parallel to the central axis of the substrate, the bending die is in a contracted state.
Preferably, the spacing unit is plane symmetrical structure, just spacing unit is wedge structure, spacing unit's cross section is rectangular cross section, spacing unit's rectangular cross section is followed spacing unit's direction of height forms the tapering structure, just spacing unit bottom terminal surface in long limit length equals 5 times of minor face length, spacing unit top terminal surface in long limit length equals 5 times of minor face length.
Preferably, the central axis of the movable platform coincides with the central axis of the base plate, and the center of the ring of the retaining ring is located on the central axis of the movable platform.
Preferably, the first revolute pair axis is parallel to the second revolute pair axis, and the second revolute pair is parallel to the short side edge of the bottom end face of the limiting unit.
Preferably, a bearing is further disposed at a first end of the upper link in the transmission unit, and the first end of the upper link is rotatably connected with a second end of the lower link by a bolt.
In a second aspect of the present invention, there is provided a variable pipe diameter bending die for a parallel pipe bender according to the foregoing, comprising the steps of:
s1, mounting a movable platform in a bending die on a pipe bending machine;
s2, driving the hydraulic cylinder to extend to drive the substrate to move, then realizing gradual unfolding of the limiting unit, and stopping the hydraulic cylinder when the diameter of the bending die is adjusted to be suitable for the diameter value of the pipe;
s3, penetrating the pipe through the round hole in the middle of the base plate, the limit unit retainer and the round hole in the middle of the movable platform;
s4, driving the hydraulic cylinder to retract to drive the base plate to move, and then gradually shrinking the limiting units, so that the top end surface of each limiting unit is contacted with the outer wall of the pipe, and fixing and limiting of the pipe are completed;
s5, starting the pipe bending machine to realize bending and forming of the pipe.
The invention has the characteristics and beneficial effects that:
1. the invention provides a bending die with variable pipe diameters for a parallel pipe bender and a bending forming method thereof, wherein the bending die with variable pipe diameters, which consists of a base plate, a transmission unit, a limiting unit retainer, a hydraulic cylinder and a movable platform, is designed by adopting a double-slide block mechanism principle, and is driven to control the base plate to move forwards and backwards by the hydraulic cylinder so as to realize the expansion or contraction of the bending die, and simultaneously, the self-locking function of the hydraulic cylinder can be utilized to realize the locking of the diameter of the bending die, so that the bending die can be flexibly suitable for pipes with different diameters, and the processing efficiency is improved.
2. The variable pipe diameter bending die for the parallel pipe bender and the bending forming method thereof provided by the invention have the advantages that the hydraulic cylinder is adopted as a driving element, the driving force is large, the self-locking function is realized, the diameter of the bending die can be locked without other devices, the structure is simple, the realization is easy, and the like.
3. The diameter of the bending die can be freely changed, the bending dies with different diameters are not required to be manufactured, the bending die is convenient and quick, and the defect that the traditional bending die needs to be replaced manually is overcome; in the processing process of the pipe bending machine, the diameter of the bending die can be freely changed, so that the pipe bending machine is beneficial to continuously processing pipes with different diameters, and more possibility is provided for processing pipes with variable diameters.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a variable pipe diameter bending die of the present invention;
FIG. 2 is a schematic diagram of the connection of the transmission unit, the limiting unit holder and the base plate according to the present invention;
FIG. 3 is a schematic view showing an expanded state of the bending die of the present invention;
FIG. 4 is a schematic view showing a contracted state of the bending die of the present invention;
FIG. 5 is a schematic view of the bending die of the present invention in an intermediate expanded state;
FIG. 6 is a schematic diagram of a spacing unit according to the present invention;
FIG. 7 is a flow chart of a bend forming method of the present invention.
The main reference numerals:
a movable platform 1; a hydraulic cylinder 2; a transmission unit 3; a lower link 31; an upper link 32; a substrate 4; a limit unit holder 5; a holding column 51; a retaining ring 52; and a limit unit 6.
Detailed Description
In order to make the technical content, the structural features, the achieved objects and the effects of the present invention more detailed, the following description will be taken in conjunction with the accompanying drawings.
The invention provides a variable pipe diameter bending die for a parallel pipe bender, which is shown in figures 1-5, and comprises a movable platform 1, a hydraulic cylinder 2, a transmission unit 3, a base plate 4, a limit unit retainer 5 and a limit unit 6, wherein the upper part of the movable platform 1 is arranged on the base plate 4, the movable platform 1 and the base plate 4 are in a circular ring structure, and round holes which can enable pipes to pass through are formed in the middle of the movable platform 1 and the base plate 4; the limiting unit retainers 5 are arranged between the movable platform 1 and the base plate 4, the limiting unit retainers 5 comprise retaining upright posts 51 and retaining circular rings 52, the retaining upright posts 51 are uniformly distributed on the retaining circular rings 52 around the circular ring centers of the retaining circular rings 52, first ends of the retaining upright posts 51 are fixedly connected with the movable platform 1, second ends of the retaining upright posts 51 are fixedly connected with the retaining circular rings 52, a plurality of limiting units 6 are uniformly distributed on the limiting unit retainers 5 in a surrounding manner, each limiting unit 6 is positioned between two adjacent retaining upright posts 51, lower ends of end faces of the bottoms of the limiting units 6 are rotationally connected with the retaining circular rings 52 through rotating pairs, the transmission units 3 are uniformly distributed on the base plate 4 around the central axis of the base plate 4, each transmission unit 3 comprises a lower connecting rod 31 and an upper connecting rod 32, first ends of the lower connecting rod 31 are rotationally connected with the base plate 4, second ends of the lower connecting rod 31 are rotationally connected with first ends of the upper connecting rod 32 through second rotating pairs, and second ends of the upper connecting rod 32 are rotationally connected with upper ends of the bottoms of the limiting units 6 through the second rotating pairs; the hydraulic cylinder 2 is arranged between the base plate 4 and the movable platform 1, the fixed end of the hydraulic cylinder 2 is fixedly connected with the movable platform 1, the driving end of the hydraulic cylinder 2 is fixedly connected with the base plate 4, the driving hydraulic cylinder 2 is driven to stretch and retract to drive the limiting unit 6 to rotate around the retaining ring 52, and the limiting unit 6 is expanded and contracted to change the diameter of the bending die so as to adapt to pipes with different pipe diameters. When the left side surface of the limit unit 6 is parallel to the central axis of the substrate 4, the bending die is in an unfolded state; when the top end surface of the limiting unit 6 is parallel to the central axis of the base plate 4, the bending die is in a contracted state.
As shown in fig. 6, the limiting unit 6 is in a plane symmetrical structure, the limiting unit 6 is in a wedge-shaped structure, the cross section of the limiting unit 6 is a rectangular cross section, the rectangular cross section of the limiting unit 6 forms a tapered structure along the height direction of the limiting unit 6, the long side length a61 in the bottom end surface of the limiting unit 6 is equal to 5 times of the short side length a62, and the long side length a63 in the top end surface of the limiting unit 6 is equal to 5 times of the short side length a64, namely a61=5a62, a63=5a64.
In a preferred manner, the central axis of the movable platform 1 coincides with the central axis of the base plate 4, and the ring center of the ring 52 is kept on the central axis of the movable platform 1. The first revolute pair axis is parallel to the second revolute pair axis, and the second revolute pair is parallel to the short side edge of the bottom end face of the limiting unit 6.
In a preferred form, a bearing is also provided at a first end of the upper link 32 in the drive unit, the first end of the upper link 32 being rotatably connected to a second end of the lower link 31 by means of a bolt.
In another aspect of the present invention, as shown in fig. 7, there is provided a bending method for a variable pipe diameter bending die of a parallel pipe bender, comprising the steps of:
s1, mounting a movable platform 1 in a bending die on a pipe bending machine;
s2, driving the hydraulic cylinder 2 to extend to drive the base plate 4 to move, then realizing gradual unfolding of the limiting unit 6, and stopping the hydraulic cylinder 2 when the diameter of the bending die is adjusted to be suitable for the diameter value of the pipe;
s3, penetrating the pipe through a round hole in the middle of the base plate 4, the limit unit retainer 5 and the round hole in the middle of the movable platform 1;
s4, driving the hydraulic cylinder 2 to retract to drive the base plate 4 to move, and then gradually shrinking the limiting units 6, so that the top end surface of each limiting unit 6 is contacted with the outer wall of the pipe, and fixing and limiting the pipe are completed;
s5, starting the pipe bending machine to realize bending and forming of the pipe.
The specific operation steps of the invention are as follows:
the invention provides a bending die with variable pipe diameters for a parallel pipe bender and a bending forming method thereof, as shown in figures 1-6, the bending die comprises a movable platform 1, a hydraulic cylinder 2, a transmission unit 3, a base plate 4, a limiting unit retainer 5 and a limiting unit 6, wherein the limiting unit retainer 5 is arranged between the movable platform 1 and the base plate 4, a plurality of limiting units 6 are uniformly distributed around the limiting unit retainer 5, the lower end of the end face of the bottom of each limiting unit 6 is rotationally connected with a retaining ring 52 in the limiting unit retainer 5 through a revolute pair, the transmission unit 3 is uniformly distributed on the base plate 4 around the central axis of the base plate 4, each transmission unit 3 comprises a lower connecting rod 31 and an upper connecting rod 32, the first end of the lower connecting rod 31 is fixedly connected with the base plate 4, the second end of the lower connecting rod 31 is rotationally connected with the first end of the upper connecting rod 32 through a first revolute pair, the second end of the upper connecting rod 32 is rotationally connected with the upper end of the bottom of the limiting unit 6, the hydraulic cylinder 2 is arranged between the base plate 4 and the movable platform 1, and the driving hydraulic cylinder 2 can drive the limiting unit 6 to rotationally extend and retract around the retaining ring 52 to realize the expansion and contraction of the pipe diameter of the pipe, and the pipe diameter of the pipe is not suitable for the expansion and the expansion of the pipe.
In a specific working process, the limit unit retainer 5 is rigidly connected with the movable platform 1, the limit unit retainer 5 can ensure that the relative position between the movable platform 1 and the rotating shaft of the limit unit 6 is unchanged, the base plate 4 is controlled to advance or retreat by driving the hydraulic cylinder 2 to stretch, the base plate 4 drives the transmission unit 3, the shrinkage and the expansion of the bending die are realized, and further the limit of pipes with different diameters is realized. Meanwhile, the bending die is of a symmetrical structure and is good in stress, the transmission unit is mainly a two-force member, the stress form is simple, and the requirements on materials and processing precision can be reduced.
The limiting unit and the transmission device thereof are designed based on the principle of the double-slider mechanism, the movement mode is flexible, the movement range is large, the diameter of the bending die can be changed in the bending process, the continuous processing of pipes with different diameters is realized, and more possibility is provided for processing pipes with variable diameters. Meanwhile, the hydraulic cylinder is used as a driving element, the driving force is large, the self-locking function is realized, the diameter of the bending die can be locked without other devices, and the device has the advantages of simple structure, easiness in realization and the like. In addition, the limit unit and the transmission unit are subjected to topological optimization according to actual working conditions, so that the main stress component has better stress performance, the strength requirement and the rigidity requirement in the bending processing process are met, and the yield of processed products is ensured.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (7)
1. A bending die with variable pipe diameter for a parallel pipe bender is characterized by comprising a movable platform, a hydraulic cylinder, a transmission unit, a base plate, a limit unit retainer and a limit unit,
the upper part of the movable platform is arranged on the base plate, the movable platform and the base plate are in a circular ring structure, and round holes which can enable the pipe to pass through are formed in the middle of the movable platform and the base plate;
the limiting unit retainers are arranged between the movable platform and the base plate, the limiting unit retainers comprise retaining columns and retaining rings, the retaining columns are uniformly distributed on the retaining rings around the centers of the annular rings, the first ends of the retaining columns are fixedly connected with the movable platform, the second ends of the retaining columns are fixedly connected with the retaining rings, the limiting units are uniformly distributed on the limiting unit retainers in a surrounding manner, each limiting unit is positioned between two adjacent retaining columns, the lower end of the bottom end face of each limiting unit is rotationally connected with the retaining rings through a revolute pair, the transmission units are uniformly distributed on the base plate around the central axis of the base plate, each transmission unit comprises a lower connecting rod and an upper connecting rod, the first ends of the lower connecting rods are fixedly connected with the base plate, the second ends of the lower connecting rods are rotationally connected with the first ends of the upper connecting rods through first revolute pairs, and the second ends of the upper connecting rods are rotationally connected with the bottom ends of the limiting units through second revolute pairs;
the hydraulic cylinder is arranged between the base plate and the movable platform, the fixed end of the hydraulic cylinder is fixedly connected with the movable platform, the driving end of the hydraulic cylinder is fixedly connected with the base plate, the hydraulic cylinder is driven to stretch and retract to drive the limiting unit to rotate around the retaining ring, and the limiting unit is used for realizing the change of the diameter of the bending die to adapt to the pipes with different pipe diameters through the expansion and contraction of the limiting unit.
2. The bending die of claim 1, wherein the bending die is in an expanded state when the left side surface of the limiting unit is parallel to the central axis of the base plate; when the top end face of the limiting unit is parallel to the central axis of the substrate, the bending die is in a contracted state.
3. The bending die for the parallel pipe bending machine according to claim 1, wherein the limiting unit is of a plane symmetrical structure, the limiting unit is of a wedge-shaped structure, the cross section of the limiting unit is of a rectangular cross section, the rectangular cross section of the limiting unit forms a tapered structure along the height direction of the limiting unit, the length of the long side in the bottom end face of the limiting unit is equal to 5 times of the length of the short side, and the length of the long side in the top end face of the limiting unit is equal to 5 times of the length of the short side.
4. The bending die for a parallel pipe bender according to claim 1, wherein the central axis of the movable platform coincides with the central axis of the base plate, and the center of the ring of the retaining ring is on the central axis of the movable platform.
5. The bending die for a parallel pipe bender according to claim 1, wherein the first revolute pair axis is parallel to the second revolute pair axis, and the second revolute pair is parallel to the short side edge of the bottom end surface of the limiting unit.
6. The bending die for a parallel pipe bender according to claim 1, wherein a bearing is further disposed at a first end of the upper link in the transmission unit, and the first end of the upper link is rotatably connected to a second end of the lower link by a bolt.
7. A bending method of a variable pipe diameter bending die for a parallel pipe bender according to any one of claims 1 to 6, comprising the steps of:
s1, mounting a movable platform in a bending die on a pipe bending machine;
s2, driving the hydraulic cylinder to extend to drive the substrate to move, then realizing gradual unfolding of the limiting unit, and stopping the hydraulic cylinder when the diameter of the bending die is adjusted to be suitable for the diameter value of the pipe;
s3, penetrating the pipe through the round hole in the middle of the base plate, the limit unit retainer and the round hole in the middle of the movable platform;
s4, driving the hydraulic cylinder to retract to drive the base plate to move, and then gradually shrinking the limiting units, so that the top end surface of each limiting unit is contacted with the outer wall of the pipe, and fixing and limiting of the pipe are completed;
s5, starting the pipe bending machine to realize bending and forming of the pipe.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2023103297697 | 2023-03-30 | ||
| CN202310329769 | 2023-03-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116408376A true CN116408376A (en) | 2023-07-11 |
Family
ID=87059469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310455669.9A Pending CN116408376A (en) | 2023-03-30 | 2023-04-25 | Variable pipe diameter bending die for parallel pipe bender and bending forming method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116408376A (en) |
-
2023
- 2023-04-25 CN CN202310455669.9A patent/CN116408376A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111375941B (en) | Automatic welding device for nanometer thin-wall pipe fitting | |
| GB2184676A (en) | Rolling tube walls | |
| CN110560587A (en) | Pipe end forming machine | |
| CN112893550B (en) | Adjustable mould device that bends of footpath suitable for a mould multitube | |
| CN103143604A (en) | Rolling and forming device for ring-shaped groove on inner wall of pipe product | |
| CN116408376A (en) | Variable pipe diameter bending die for parallel pipe bender and bending forming method thereof | |
| CN202447545U (en) | Diameter expanding type sizing mill for steel pipe end | |
| CN117506101A (en) | Main reinforcement positioning device of reinforcement cage processing seam welder | |
| RU2394684C2 (en) | Horizontal hydraulic press to press out and press in large-sized assembly units and parts | |
| CN114633496B (en) | Demolding device and method for integral molding tool of composite material cylinder section structure | |
| CN210586445U (en) | High-efficient type heat exchange tube apparatus for producing and heat exchange tube | |
| CN113263095B (en) | Multi-pass coupled wheel spinning machine for large thin-wall rectangular corrugated pipe | |
| CN215036922U (en) | Clamping mechanism | |
| CN109551751B (en) | Pipe orifice adjusting device for pipe machining | |
| CN210315258U (en) | Assembled movable support for assembling segmental box girder cantilever | |
| CN217512589U (en) | Ring member reeling machine | |
| CN111589956A (en) | Forming die of vertical rod self-locking device for scaffold | |
| CN217192130U (en) | Novel steel pipe flaring machine | |
| CN2316059Y (en) | Special-purpose equipment for making taper tube | |
| CN112475719B (en) | Forming mechanism of non-circular cross-section steel bar framework seam welder | |
| CN219078241U (en) | Assistant installer for assembled building steel tube bundles | |
| CN215199694U (en) | Pneumatic chuck | |
| CN217071106U (en) | Plasma spray welding device suitable for multiple specifications of gear wheels | |
| CN112547985B (en) | Coil winding system integrating functions of straightening, winding and stripping | |
| CN214558885U (en) | Dismounting device of permanent magnet machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |