CN112974591A - Electric auxiliary bending device and method - Google Patents
Electric auxiliary bending device and method Download PDFInfo
- Publication number
- CN112974591A CN112974591A CN202110463736.2A CN202110463736A CN112974591A CN 112974591 A CN112974591 A CN 112974591A CN 202110463736 A CN202110463736 A CN 202110463736A CN 112974591 A CN112974591 A CN 112974591A
- Authority
- CN
- China
- Prior art keywords
- processed
- die
- section
- female die
- male die
- 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.)
- Granted
Links
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
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/12—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by stretching with or without twisting
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention discloses an electric auxiliary bending device which comprises a male die, a female die, a fixing component and an auxiliary component, wherein the fixing component can fix a profile to be processed, and the fixing component can drive the profile to be processed to move and enable the profile to be processed to recover deformation; the profile to be treated can be energized by means of the auxiliary assembly. By utilizing the electric auxiliary bending device, the section to be processed is bent, the section to be processed is electrified, joule resistance heat generated by current flowing through the section to be processed directly heats the section to be processed, so that the temperature of the section to be processed is kept within a forming temperature range, and the section to be processed is subjected to plastic deformation under the action of the female die and the male die, so that the temperature inside the section to be processed is uniformly distributed, the plastic forming is facilitated, and the product quality is improved. The invention also provides an electric auxiliary bending method, which is used for straightening the section to be processed after the section is bent, and repeatedly bending and straightening, so that the bending cracks and bending resilience in the forming process can be effectively reduced, and the forming quality is improved.
Description
Technical Field
The invention relates to the technical field of stamping and forming, in particular to an electric auxiliary bending device and method.
Background
The bending forming is a process of bending plate materials, wire materials and section blank materials into required shapes under the pressure action of a press machine by utilizing a bending die. It is one of the basic processes of stamping and can be used for processing various parts with complex shapes.
In the actual bending forming process, the phenomena of severe bending resilience, difficult bending, poor forming performance and the like can occur, and the results can affect the surface quality, hardness, strength, toughness, service life and other performances of the workpiece to different degrees.
In summary, how to change the current situation of severe bending springback phenomenon in the bending forming process in the prior art becomes a problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide an electric auxiliary bending device and method, which are used for solving the problems in the prior art, reducing the bending resilience phenomenon in the bending forming process and improving the forming quality.
In order to achieve the purpose, the invention provides the following scheme: the invention provides an electric auxiliary bending device which comprises a male die, a female die, a fixing component and an auxiliary component, wherein the shape of the male die is matched with that of the female die, the male die and the female die are respectively positioned at two opposite sides of a profile to be processed, and the male die and the female die are matched to bend the profile to be processed;
the fixing assemblies can fix the section bar to be processed, the number of the fixing assemblies is at least two, at least one group of fixing assemblies can drive the section bar to be processed to move, and the bent part of the section bar to be processed can recover deformation;
the profile to be treated can be electrified by means of the auxiliary assembly and can be heated.
Preferably, the number of the fixing assemblies is two, the two fixing assemblies are respectively arranged at two opposite ends of the profile to be processed, and the relative movement direction of the two fixing assemblies is perpendicular to the relative movement direction of the male die and the female die.
Preferably, the fixing component is connected with a driving element, and the driving element can drive the fixing component to reciprocate.
Preferably, the drive element is a hydraulic cylinder.
Preferably, the auxiliary assembly comprises a first electrode, a second electrode and a power supply, the first electrode is connected with the first end of the profile to be treated, the second electrode is connected with the second end of the profile to be treated, and the first electrode and the second electrode are connected with two poles of the power supply.
Preferably, the male die is located at the top of the section to be processed, the male die is connected with an upper die holder, the upper die holder is connected with an upper die handle, the female die is located at the bottom of the section to be processed, the female die is connected with a lower die holder, the lower die holder is connected with a lower die handle, and the upper die handle and the lower die handle can be connected with a press machine.
Preferably, a male die base plate is further arranged between the upper die holder and the male die, and a female die base plate is further arranged between the lower die holder and the female die.
Preferably, a punch fixing plate is further arranged between the punch and the punch backing plate, and a die fixing plate is further arranged between the die backing plate and the die.
The invention also discloses an electric auxiliary bending method, which utilizes the electric auxiliary bending device and comprises the following steps:
step one, electrifying a section to be treated, wherein the section to be treated generates heat;
step two, bending the section to be processed;
straightening the bent section to be treated to recover the deformation of the bent part of the section to be treated;
repeating the second step and the third step for N times, and entering the fourth step, wherein N is more than or equal to 0;
and step four, bending the section to be processed.
Compared with the prior art, the invention has the following technical effects: the electric auxiliary bending device comprises a male die, a female die, a fixing component and an auxiliary component, wherein the shape of the male die is matched with that of the female die, the male die and the female die are respectively positioned on two opposite sides of a profile to be processed, and the male die and the female die are matched to bend the profile to be processed; the fixing assemblies can fix the section bar to be processed, the number of the fixing assemblies is at least two, wherein at least one group of fixing assemblies can drive the section bar to be processed to move and enable the bent part of the section bar to be processed to recover deformation; the profile to be treated can be energized and heated by means of the auxiliary assembly.
The invention also provides an electric auxiliary bending method, which comprises the following steps: step one, electrifying a section to be treated, and heating the section to be treated; step two, bending the section to be processed; straightening the bent section to be treated to recover the deformation of the bent part of the section to be treated; repeating the second step and the third step for N times, and entering the fourth step, wherein N is more than or equal to 0; and step four, bending the section to be processed.
By utilizing the electric auxiliary bending device, the section to be processed is bent, the section to be processed is electrified, joule resistance heat generated by current flowing through the section to be processed directly heats the section to be processed, so that the temperature of the section to be processed is kept within a forming temperature range, and the section to be processed is subjected to plastic deformation under the action of the female die and the male die, so that the temperature inside the section to be processed is uniformly distributed, the plastic forming is facilitated, and the product quality is improved. The electric auxiliary bending method can straighten the profile to be processed after the profile is bent, and repeatedly bend and straighten the profile, thereby effectively reducing the bending cracks and the bending resilience in the forming process and improving the forming quality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural view of an electrically assisted press bending apparatus according to the present invention;
FIG. 2 is a schematic view of the electric auxiliary bending apparatus according to the present invention during pressing operation;
FIG. 3 is a schematic view of the electric auxiliary bending device for bending and opening the mold;
FIG. 4 is a schematic view of the electrically assisted press bending apparatus of the present invention during straightening;
the device comprises a base, a pressing device, a fixing component, a driving component, a male die, a female die, a fixing component, a driving component, a first electrode, a second electrode, an upper die base, an upper die handle, a lower die base, a lower die handle, a male die base plate, a female die base plate, a male die fixing plate, a female die fixing plate, a 15 and a section to be processed, wherein 100 is the electric auxiliary pressing device, 1 is the male die, 2 is the female.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide an electric auxiliary bending device and method, which are used for solving the problems in the prior art, reducing the bending resilience phenomenon in the bending forming process and improving the forming quality.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1-4, fig. 1 is a schematic structural view of an electric auxiliary bending apparatus of the present invention, fig. 2 is a schematic view of the electric auxiliary bending apparatus of the present invention during pressing operation, fig. 3 is a schematic view of the electric auxiliary bending apparatus of the present invention during bending operation and mold opening operation, and fig. 4 is a schematic view of the electric auxiliary bending apparatus of the present invention during straightening operation.
The invention provides an electric auxiliary press bending device 100 which comprises a male die 1, a female die 2, a fixing component 3 and an auxiliary component 4, wherein the male die 1 is positioned at the top of the female die 2, both the male die 1 and the female die 2 can be connected with a press machine, the press machine can drive the male die 1 and the female die 2 to reciprocate, the shape of the male die 1 is matched with that of the female die 2, and the male die 1 and the female die 2 are respectively positioned at the top and the bottom of a profile 16 to be processed;
the fixing assemblies 3 can fix the section bar 16 to be processed, the number of the fixing assemblies 3 is at least two, and at least one group of fixing assemblies 3 can drive the section bar 16 to be processed to move and enable the bent part of the section bar 16 to be processed to recover deformation;
the profile 16 to be treated can be energized by means of the auxiliary assembly 4 and the profile 16 to be treated is heated.
By utilizing the electric auxiliary bending device 100, the section bar 16 to be processed is bent, the section bar 16 to be processed is electrified, joule resistance heat generated by current flowing through the section bar 16 to be processed directly heats the section bar 16 to be processed, so that the temperature of the section bar is kept within a forming temperature range, and the section bar is subjected to plastic deformation under the action of the female die 2 and the male die 1, so that the temperature inside the section bar 16 to be processed is uniformly distributed, plastic forming is facilitated, and the product quality is improved. In the bending and forming process, the section 16 to be processed is straightened after being bent, and repeated bending and straightening operations can effectively reduce bending cracks and bending resilience in the forming process and improve the forming quality. The electric auxiliary bending device 100 has the advantages of simple structure, high forming efficiency, low energy consumption, stable product quality and the like.
In this embodiment, the number of the fixing assemblies 3 is two, the two fixing assemblies 3 are respectively disposed at two opposite ends of the to-be-processed section bar 16, the relative movement direction of the two fixing assemblies 3 is perpendicular to the relative movement direction of the male die 1 and the female die 2, the male die 1 and the female die 2 are matched to bend the to-be-processed section bar 16, and the two fixing assemblies 3 move in opposite directions to straighten the to-be-processed section bar 16.
In order to facilitate the movement of the fixed component 3 and improve the movement accuracy, the fixed component 3 is connected with a driving element 5, the driving element 5 can drive the fixed component 3 to reciprocate, and the position of the fixed component 3 can be adjusted to realize the bending forming at different positions of the section bar 16 to be processed.
In other embodiments of the present invention, the driving element 5 is a hydraulic cylinder, and other driving manners can be selected in the actual production process. It should be noted here that, in the actual production operation, the fixing component 3 and the driving element 5 are both fixed on the installation base, so as to improve the stability and reliability of the device.
The auxiliary assembly 4 comprises a first electrode 6, a second electrode 7 and a power supply, wherein the first electrode 6 is connected with a first end of the profile 16 to be treated, the second electrode 7 is connected with a second end of the profile 16 to be treated, and the first electrode 6 and the second electrode 7 are connected with two poles of the power supply. The first electrode 6 and the second electrode 7 are respectively abutted against the edge of the section bar 16 to be processed, the first electrode 6 and the second electrode 7 are connected with two poles of a power supply, the section bar 16 to be processed is electrified by the first electrode 6, the second electrode 7 and the power supply, and the power supply can be selected from an external power supply and other forms. It should be noted that, in other embodiments of the present invention, the power supply may be grounded to increase the safety factor of the apparatus, and in addition, an insulating layer may be disposed on the outer surface of the profile 16 to be processed, and insulating spacers may be disposed between the first electrode 6, the second electrode 7, the fixing assembly 3 and the driving element 5 to increase the insulation of the apparatus and ensure the operation safety.
Specifically, the male die 1 is located at the top of the section bar to be processed 16, the male die 1 is connected with an upper die holder 8, the upper die holder 8 is connected with an upper die handle 9, the female die 2 is located at the bottom of the section bar to be processed 16, the female die 2 is connected with a lower die holder 10, the lower die holder 10 is connected with a lower die handle 11, the upper die handle 9 and the lower die handle 11 can be connected with a press machine, and a convenient device is connected with the press machine to smoothly realize the bending operation.
In order to avoid that the upper die holder 8 and the lower die holder 10 are damaged due to overlarge stress in the forming process, a male die base plate 12 is arranged between the upper die holder 8 and the male die 1, and a female die base plate 13 is arranged between the lower die holder 10 and the female die 2, so that the acting force is buffered, and the reliability of the device is improved.
More specifically, a punch retainer 14 is arranged between the punch backing plate 12 and the punch 1, and a die retainer 15 is arranged between the die backing plate 13 and the die 2, so that convenience is provided for fixing the punch 1 and the die 2.
Further, the present invention also discloses an electric auxiliary bending method, which comprises the following steps:
connecting the male die 1 and the female die 2 with a press machine, fixing the section bar 16 to be treated by using the fixing component 3, and electrifying the section bar 16 to be treated;
the press machine drives the male die 1 and the female die 2 to move towards the section bar 16 to be processed, the male die 1 and the female die 2 are both abutted against the section bar 16 to be processed, die assembly is completed, the section bar 16 to be processed is in a bending state, and the male die 1 and the female die 2 are reset;
the fixing component 3 drives the section bar 16 to be processed to move, the section bar 16 to be processed restores deformation, and the section bar 16 to be processed is in a straightening state;
repeating the steps that the press drives the male die 1 and the female die 2 to move towards the section bar 16 to be processed, the male die 1 and the female die 2 are both abutted against the section bar 16 to be processed to complete die assembly, the section bar 16 to be processed is in a bending state, the male die 1 and the female die 2 are reset, and the fixing assembly 3 drives the section bar 16 to be processed to move, the section bar 16 to be processed recovers deformation, and the section bar 16 to be processed is in a straightening state;
and (3) bending the section bar 16 to be processed, resetting the male die 1 and the female die 2, powering off the section bar 16 to be processed, and taking out the formed piece.
According to the electric auxiliary bending method, the section 16 to be processed is straightened after being bent, and repeated bending and straightening operations are carried out, so that bending cracks and bending resilience in the forming process can be effectively reduced, and the forming quality is improved.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (9)
1. An electric auxiliary bending device is characterized in that: the device comprises a male die, a female die, a fixing component and an auxiliary component, wherein the shape of the male die is matched with that of the female die, the male die and the female die are respectively positioned on two opposite sides of a profile to be processed, and the male die and the female die are matched to bend the profile to be processed;
the fixing assemblies can fix the section bar to be processed, the number of the fixing assemblies is at least two, at least one group of fixing assemblies can drive the section bar to be processed to move, and the bent part of the section bar to be processed can recover deformation;
the profile to be treated can be electrified by means of the auxiliary assembly and can be heated.
2. The electrically assisted press bending apparatus according to claim 1, wherein: the number of the fixing assemblies is two, the two fixing assemblies are respectively arranged at two opposite ends of the section bar to be processed, and the relative movement direction of the two fixing assemblies is perpendicular to the relative movement direction of the male die and the female die.
3. The electrically assisted press bending apparatus according to claim 1, wherein: the fixed component is connected with a driving element, and the driving element can drive the fixed component to reciprocate.
4. The electrically assisted press bending apparatus according to claim 3, wherein: the driving element is a hydraulic cylinder.
5. The electrically assisted press bending apparatus according to claim 1, wherein: the auxiliary assembly comprises a first electrode, a second electrode and a power supply, the first electrode is connected with the first end of the section bar to be processed, the second electrode is connected with the second end of the section bar to be processed, and the first electrode and the second electrode are connected with two poles of the power supply.
6. The electrically assisted press bending apparatus according to claim 1, wherein: the male die is located at the top of the section to be processed and connected with an upper die holder, the upper die holder is connected with an upper die handle, the female die is located at the bottom of the section to be processed and connected with a lower die holder, the lower die holder is connected with a lower die handle, and the upper die handle and the lower die handle can be connected with a press machine.
7. The electrically assisted press bending apparatus according to claim 6, wherein: a male die base plate is further arranged between the upper die base and the male die, and a female die base plate is further arranged between the lower die base and the female die.
8. The electrically assisted press bending apparatus according to claim 7, wherein: a male die fixing plate is further arranged between the male die and the male die base plate, and a female die fixing plate is further arranged between the female die base plate and the female die.
9. An electrically assisted press bending method is characterized by comprising the following steps:
step one, electrifying a section to be treated, wherein the section to be treated generates heat;
step two, bending the section to be processed;
straightening the bent section to be treated to recover the deformation of the bent part of the section to be treated;
repeating the second step and the third step for N times, and entering the fourth step, wherein N is more than or equal to 0;
and step four, bending the section to be processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110463736.2A CN112974591B (en) | 2021-04-26 | 2021-04-26 | Electric auxiliary bending device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110463736.2A CN112974591B (en) | 2021-04-26 | 2021-04-26 | Electric auxiliary bending device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112974591A true CN112974591A (en) | 2021-06-18 |
| CN112974591B CN112974591B (en) | 2022-02-22 |
Family
ID=76340491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110463736.2A Active CN112974591B (en) | 2021-04-26 | 2021-04-26 | Electric auxiliary bending device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112974591B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114505388A (en) * | 2022-01-24 | 2022-05-17 | 燕山大学 | Repeated bending leveling device for plate and leveling processing method |
| CN116786643A (en) * | 2022-03-04 | 2023-09-22 | 赵健 | Aluminum profile bending and forming system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500675A (en) * | 2011-10-13 | 2012-06-20 | 北京航空航天大学 | Hot forming tool of titanium alloy thin-wall part and machining method of hot forming tool |
| DE102013110005A1 (en) * | 2013-09-12 | 2015-03-12 | Fritz Rimmel | Device for bending gutters |
| CN105855345A (en) * | 2016-06-04 | 2016-08-17 | 沈阳理工大学 | Magnesium alloy plate two-way circulation bending composite deformation method and die device |
| CN109513832A (en) * | 2018-12-26 | 2019-03-26 | 山东理工大学 | A kind of sheet metal isothermal molding deformation processing method |
| CN111545649A (en) * | 2020-05-11 | 2020-08-18 | 燕山大学 | Metal plastic forming method based on self-resistance heating |
-
2021
- 2021-04-26 CN CN202110463736.2A patent/CN112974591B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500675A (en) * | 2011-10-13 | 2012-06-20 | 北京航空航天大学 | Hot forming tool of titanium alloy thin-wall part and machining method of hot forming tool |
| DE102013110005A1 (en) * | 2013-09-12 | 2015-03-12 | Fritz Rimmel | Device for bending gutters |
| CN105855345A (en) * | 2016-06-04 | 2016-08-17 | 沈阳理工大学 | Magnesium alloy plate two-way circulation bending composite deformation method and die device |
| CN109513832A (en) * | 2018-12-26 | 2019-03-26 | 山东理工大学 | A kind of sheet metal isothermal molding deformation processing method |
| CN111545649A (en) * | 2020-05-11 | 2020-08-18 | 燕山大学 | Metal plastic forming method based on self-resistance heating |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114505388A (en) * | 2022-01-24 | 2022-05-17 | 燕山大学 | Repeated bending leveling device for plate and leveling processing method |
| CN114505388B (en) * | 2022-01-24 | 2022-10-21 | 燕山大学 | Repeated bending leveling device and leveling processing method for plate |
| CN116786643A (en) * | 2022-03-04 | 2023-09-22 | 赵健 | Aluminum profile bending and forming system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112974591B (en) | 2022-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112974591B (en) | Electric auxiliary bending device and method | |
| CN109570364B (en) | Electric field auxiliary forming die for ultrahigh-strength multi-channel bent part | |
| CN103406415B (en) | High-strength steel elongated structural elements electric current assists Rapid Thermal building mortion and method | |
| CN107139517B (en) | A kind of drawing and forming device and method of the non-axisymmetric parts of difficult-to-deformation material | |
| CN111054851B (en) | Method for producing two-dimensionally or three-dimensionally shaped flat conductors from metal | |
| CN110014067B (en) | Uniform-pressure coil type electromagnetic forming device and forming method | |
| CN108856442B (en) | Warm electromagnetic forming device and method for skin piece | |
| RU2321469C2 (en) | Method for plastic working of metals | |
| CN212664583U (en) | Stamping equipment of continuous punching press | |
| CN114054600A (en) | Current-assisted warm fine blanking die and warm fine blanking method | |
| CN101341634B (en) | Clamp body for electrical connector clamps | |
| CN103648675B (en) | electric heating device and method | |
| JP2007260761A (en) | Hot press forming device | |
| CN110497490B (en) | Stamping die assembly and stamping method for bamboo frame component | |
| CN109865768A (en) | Device and method for forming aluminium sheet | |
| CN100586702C (en) | Joint winding machine and processing method using the same | |
| CN106064193B (en) | A kind of blanking method of ultra-high strength steel plate | |
| JPH0751749A (en) | Method for bending thick metallic material | |
| CN218340814U (en) | Bending die for steel plate | |
| JP2009101378A (en) | Pressing device for die quenching technique | |
| CN220547473U (en) | Online alignment guide device for producing building hot rolled flat steel | |
| CN211707884U (en) | Stamping die for thick plates | |
| CN108889841B (en) | Tongue-pressing type bus duct contact and processing equipment thereof | |
| SU1395404A1 (en) | Method of stamping parts from sheet blanks | |
| CN215452724U (en) | Generator stator bar end forming device |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230607 Address after: No. 3, North Xincun Street, Shengfang Town, Bazhou City, Langfang, Hebei Province 065000 Patentee after: Bazhou Jiyue Metal Products Co.,Ltd. Address before: No.438, west section of Hebei Street, Haigang District, Qinhuangdao City, Hebei Province Patentee before: Yanshan University |