CN209886755U - Rack end face finish milling equipment - Google Patents
Rack end face finish milling equipment Download PDFInfo
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- CN209886755U CN209886755U CN201920288609.1U CN201920288609U CN209886755U CN 209886755 U CN209886755 U CN 209886755U CN 201920288609 U CN201920288609 U CN 201920288609U CN 209886755 U CN209886755 U CN 209886755U
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Abstract
The utility model relates to a rack terminal surface finish milling equipment, a serial communication port, include: the workbench is used for grabbing the rack and then transferring the rack to the first conveying mechanism of the workbench, is arranged on the workbench and is matched with the positioning teeth of the rack, the teeth of the positioning teeth are laterally placed, the clamping mechanism for clamping the rack is used, and the milling mechanism for processing the clamped rack is used. The application provides a rack terminal surface finish milling equipment, the terminal surface finish milling machining precision is high.
Description
Technical Field
The utility model belongs to the technical field of rack processing and specifically relates to a rack end face finish milling equipment.
Background
At present, in the engineering machinery industry, some parts can adopt gear and rack transmission, the gear and rack transmission converts rotary motion into linear motion, the transmission power of the gear and rack transmission is large, the speed range is wide, the efficiency is high, the work is reliable, the service life is long, the structure is compact, and the constant transmission ratio can be ensured. The positioning mechanism is suitable for a quick and accurate positioning mechanism; the method is suitable for numerical control machines, cutting machines, welding machines and the like with heavy load, high precision, high rigidity, high speed and long stroke, and has a wide application range.
The rack, which is an important part of the gear rack, is divided into a straight rack and a helical rack, the rack can be defined as a flat plate or a straight rod with a series of teeth distributed equidistantly, the profile of the rack is a straight line instead of an involute, and the reference circle radius is equivalent to an infinite cylindrical gear. In the course of working of rack, the both ends of rack on along length direction roughly mill the back, need mill the finish milling to both ends face, because the finished end face of rack hangs down straightness and dimensional accuracy and requires highly, if adopt a plurality of racks simultaneous processing, can produce the chatter marks on the terminal surface of finish milling, and rack length dimensional accuracy can not satisfy the processing requirement.
Therefore, how to design rack end face finish milling equipment and improve end face machining precision becomes a technical problem to be solved urgently by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
Solve the technical problem, an object of the utility model is to provide a rack terminal surface finish milling equipment, the terminal surface finish milling machining precision is high.
The technical scheme of the utility model as follows:
a rack end face finish milling apparatus comprising: a working table is arranged on the upper portion of the machine body,
a first grabbing mechanism which grabs the rack and transfers the rack to the workbench,
a positioning tooth arranged on the workbench and matched with the rack, wherein the tooth of the positioning tooth is arranged laterally,
a clamping mechanism for clamping the rack bar,
and a milling mechanism for processing the clamped rack.
Preferably, the rack end face finish milling apparatus comprises: the rack body, the linear guide rail arranged on the rack body and the sliding block arranged in a sliding manner with the linear guide rail; the first grabbing mechanism is connected with the sliding block.
Preferably, the first grabbing mechanism comprises an arm support, the arm support is connected with a sliding block, and an electromagnetic chuck is arranged at the lower end of the arm support and used for grabbing the rack;
preferably, a rotating part is arranged on the first grabbing mechanism and controls the electromagnetic chuck to rotate.
Preferably, the clamping mechanism comprises an air cylinder, the air cylinder is arranged opposite to the positioning teeth, and an output shaft of the air cylinder and the positioning teeth clamp the rack together.
Preferably, the output shaft of the cylinder is sleeved with a spring, and when the output shaft of the cylinder extends, the spring is in a compressed state.
Preferably, the device comprises a second grabbing mechanism for grabbing and transferring the rack with the end face being milled from the workbench.
Preferably, the second grabbing mechanism comprises an arm support, the arm support is connected with the sliding block, and an electromagnetic chuck is arranged at the lower end of the arm support.
Preferably, the number of the milling mechanisms is two, and the two milling mechanisms are respectively positioned on two sides of the positioning tooth.
Preferably, the milling mechanism comprises a tool holder and a tool arranged on the tool holder.
The utility model provides a pair of rack terminal surface finish milling equipment, including the workstation to and snatch after the rack and transport to the first conveying mechanism of workstation, locate on the workstation, and with rack complex location tooth, the tooth side of location tooth is to placing, and with the tight clamping mechanism of rack clamp, and to the mechanism of milling of the tight rack processing of clamp. The rack is used as a part suitable for a quick and accurate positioning mechanism, the verticality (the vertical state between evaluation planes) of adjacent surfaces and the overall dimension precision of the rack are high in requirement, in order to effectively avoid the phenomenon that vibration lines are generated on two end surfaces of the rack due to vibration, and therefore the dimension precision cannot meet the requirement, the rack is machined one by one in the rack end surface finish milling mode, a first conveying mechanism firstly grabs one rack and then moves the rack, in order to guarantee the verticality between the side surface of the rack and the end surface, the side surface of the rack is used as a machining reference, the side surface of the rack is attached to the table surface of a workbench, the tooth side direction of positioning teeth is placed, the first conveying mechanism moves the rack to the position corresponding to the positioning teeth, the clamping mechanism clamps the rack, and then the milling mechanism performs finish milling on the clamped. Compared with the prior art, the gear rack machining device has the advantages that the gear racks are machined one by one, the multiple gear racks are prevented from being clamped simultaneously, vibration lines are generated on the end faces in the machining process, and the machining size precision of the gear racks is improved. The positioning teeth are laterally placed, the tooth surfaces of the positioning teeth and the tooth surfaces of the racks are matched with each other and then clamped by the clamping mechanism, and firstly, the positions of the racks are fixed and the racks are not easy to shift; and secondly, the side surface of the rack is used as a processing reference, so that the verticality between the side surface and the end surface of the rack is ensured. Therefore, the rack end face finish milling equipment that this application provided compares with prior art, and the terminal surface machining precision is high.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural view of a rack end face finish-milling device in the embodiment;
fig. 2 is a schematic view of a state of the rack transfer by the first grabbing mechanism of the rack end face finish-milling apparatus in the embodiment;
fig. 3 is a schematic view of a state in which the first grabbing mechanism of the rack end face finish milling apparatus grabs the rack in this embodiment;
reference numbers in the drawings illustrate: 1. a work table; 2. a rack; 3. a first conveying mechanism; 4. positioning teeth; 5. a clamping mechanism; 51. a cylinder; 6. a milling mechanism; 61. a tool holder; 62. a cutter; 7. a frame body; 8. A linear guide rail; 9. a slider; 10. a first grasping mechanism; 101. a boom; 102. an electromagnetic chuck; 103. A rotating member; 11. and a second grasping mechanism.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships, and are used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
Please show as fig. 1 to fig. 3, the utility model provides a rack end face finish milling equipment, including workstation 1 to and snatch behind the rack 2 and transport to workstation 1's first conveying mechanism 3, locate on workstation 1, and with rack 2 complex location tooth 4, the tooth side of location tooth 4 is to placing, and with the clamping mechanism 5 that rack 2 presss from both sides tightly, and to the milling mechanism 6 of the rack 2 processing that has pressed from both sides tightly. The rack 2 is used as a part suitable for a quick and accurate positioning mechanism, the verticality (the vertical state between evaluation planes) of adjacent surfaces and the overall dimension precision are high in requirement, vibration lines are generated on two end surfaces of the rack 2 due to vibration so that the dimension precision cannot meet the requirement, the rack 2 is machined one by one in the finish milling of the end surface of the rack 2, the rack 2 is grabbed and then moved by the first conveying mechanism 3, in order to ensure the verticality between the side surface and the end surface of the rack 2, the side surface of the rack 2 is attached to the table surface of the working table 1, the tooth side direction of the positioning tooth 4 is placed, the rack 2 is moved to the position corresponding to the positioning tooth 4 by the first conveying mechanism 3, the rack 2 is clamped by the clamping mechanism 5, and the clamped rack 2 is subjected to finish milling by the milling mechanism 6. Compared with the prior art, the gear rack machining method has the advantages that the gear racks 2 are machined one by one, the gear racks 2 are prevented from being clamped simultaneously, vibration lines are generated on end faces in the machining process, and machining size precision of the gear racks 2 is improved. The positioning teeth 4 are laterally placed, the tooth surfaces of the positioning teeth 4 are matched with the tooth surface of the rack 2, and then the clamping mechanism 5 clamps the positioning teeth, so that the rack 2 is fixed, and the movement is not easy to occur; secondly, the side surface of the rack 2 is used as a processing reference, and the perpendicularity between the side surface of the rack 2 and the end surface is ensured. Therefore, the 2 terminal surfaces finish milling equipment of rack that this application provided compares with prior art, and the terminal surface machining precision is high.
Wherein, the cooperation of location tooth 4 and rack 2 can be, location tooth 4 and the whole cooperation of rack 2, can also be the preferred, location tooth 4 is provided with 3, one locates 2 intermediate positions of rack, two other location teeth 4 are located respectively and are close to 2 terminal surface of rack side ascending both sides, the setting mode of this kind of rack 2 location except can fixing rack 2 on workstation 1, can also reduce the tooth pitch machining error of finished product rack 2 department of being connected to improve the machining precision of rack 2.
Further, rack 2 terminal surface finish milling equipment includes: the support body 7 is arranged on a linear guide rail 8 on the support body 7, a sliding block 9 arranged in a sliding mode with the linear guide rail 8 is connected with the sliding block 9, and a first grabbing mechanism 10 is connected with the sliding block 9 and used for grabbing the rack 2. Preferably, linear guide 8 and support body 7 can be dismantled and be connected, slider 9 takes first snatch mechanism 10 to slide along linear guide 8, first snatch mechanism 10 snatchs rack 2, move rack 2 to the position corresponding with location tooth 4 until first snatch mechanism 10, first snatch mechanism 10 places rack 2 behind workstation 1, return to initial position, rack 2 cooperatees with location tooth 4 for rack 2 position is definite, at this moment, clamping mechanism 5 presss from both sides tightly rack 2 again, then mill mechanism 6 and carry out the finish milling of terminal surface to rack 2 again. The arrangement separates the feeding area and the milling area of the rack 2, improves the operation safety and shortens the processing preparation time.
In the embodiment of the present invention, the first grabbing mechanism 10 includes an arm support 101, the arm support 101 is connected to the slider 9, and the lower end of the arm support 101 is equipped with an electromagnetic chuck 102. The slider 9 drives the arm support 101 to slide on the linear guide rail 8 and move to a feeding area, in the feeding area, the side face of the rack 2 is placed on a horizontal plane, the tooth face of the rack 2 is opposite to the tooth face of the positioning teeth 4, the electromagnetic chuck 102 moves downwards until the electromagnetic chuck 102 contacts the side face of the rack 2, the electromagnetic chuck 102 generates magnetic force by electrifying an internal coil, the rack 2 contacting the surface of the panel is tightly attracted through a magnetic conduction panel, the electromagnetic chuck 102 grabs the plurality of racks 2 and moves along the linear guide rail 8, when the rack 2 moves to a position close to the positioning teeth 4, the coil of the electromagnetic chuck 102 is powered off, the magnetic force disappears to achieve demagnetization, and the first grabbing mechanism 10 returns to the feeding area. Compared with the manual loading and unloading of the rack 2 in the prior art, the arrangement of the electromagnetic chuck 102 improves the safe operation coefficient, and meanwhile, the electromagnetic chuck 102 has an automatic auxiliary positioning function, so that the rack 2 can be effectively prevented from moving in the grabbing process, and a large amount of time for adjusting the position of the rack 2 is saved. Meanwhile, the end face finish milling and scrapping caused by the fact that the end faces on the same side of the racks 2 are not on the same plane due to the fact that the racks 2 are moved are avoided.
Preferably, the first grasping mechanism 10 is provided with a rotating member 103, and the rotating member 103 can rotate the electromagnetic chuck 102. In the rough milling stage of the rack 2, in order to improve the processing efficiency, a plurality of racks 2 are usually clamped and processed at the same time, and a bottom surface (a surface opposite to a tooth surface) of the rack 2 is hoisted by a hoisting tool, wherein the tooth surface faces downwards. And after the rough milling is finished, the workpiece is conveyed to a finish milling working area by a lifting appliance. When the finish milling, in order to ensure the size precision and the straightness that hangs down of both ends face, need finish milling one by one, this just needs operating personnel, treat 2 backs of finish milling rack upset 90 earlier, go to carry out the finish milling processing again, in order to ensure terminal surface finish milling processingquality, operating personnel's intensity of labour has been improved greatly, therefore, the 2 terminal surfaces finish milling equipment of rack that this application provided, set up swivel member 103 on first snatching mechanism 10, when electromagnet 102 snatchs 2 rack down of rack 2, swivel member 103 control electromagnet 102 rotates 90, rack 2 also follows the rotation simultaneously, rack 2 is turned into 2 towards the side of rack by the flank of tooth downwards. The first grabbing mechanism 10 moves the rack 2 to the positioning teeth 4, and the rack is matched with the positioning teeth 4 to be clamped tightly, so that end face finish milling is completed. The work of turning the rack 2 by an operator is omitted, the labor intensity of the operator is reduced, and the work efficiency is greatly improved.
The embodiment of the utility model provides an in, clamping mechanism 5 includes cylinder 51, and cylinder 51 sets up with location tooth 4 relatively, cylinder 51's output shaft and the common centre gripping rack 2 of location tooth 4. When the rack 2 is placed between the positioning teeth 4 and the air cylinder 51, the tooth surface of the rack 2 is opposite to the tooth surface of the positioning teeth 4, the output shaft of the air cylinder 51 extends out, and the air cylinder 51 and the positioning teeth 4 clamp the rack 2 together. Preferably, the cylinder 51 is provided in plurality.
Further, a spring is fitted around the output shaft of the cylinder 51, and when the output shaft of the cylinder 51 is extended, the spring is in a compressed state. When the cylinder 51 is in a working state, the tooth surface of the rack 2 is in contact with the tooth surface of the positioning tooth 4, the output shaft of the cylinder 51 extends out, the spring sleeved on the output shaft is in a compression state, after the finish milling of the end surface of the rack 2 is completed, the output shaft retracts, the spring is changed from the compression state to a non-compression state, in the process of springback of the spring, after the finish milling of the rack 2 is completed, the clamp is detached more easily, and the labor intensity of an operator is reduced.
The embodiment of the utility model provides an in, rack end face finish milling equipment includes rack 2 with the terminal surface finish milling, snatchs and the second that shifts from workstation 1 and snatchs mechanism 11. The first gripping mechanism 10 is used for feeding, and the second gripping mechanism 11 is used for discharging. Preferably, in the processing process of the rack 2, the first grabbing mechanism 10 grabs the rack 2 to be processed to be ready, after the finish milling of the rack 2 is finished, the second grabbing mechanism 11 grabs the rack 2 and transfers the rack 2 from the workbench 1 to a finished product area, meanwhile, the first grabbing mechanism 10 places the rack 2 between the positioning teeth 4 and the air cylinder 51 and horizontally places the rack on the workbench 1, so that the finish milling processing process of the rack 2 has serial operation and becomes parallel operation, the material can be discharged while loading, the processing efficiency is greatly improved, and the energy consumption is reduced.
The second grabbing mechanism 11 is connected with the sliding block 9, preferably, the second grabbing mechanism 11 comprises an electromagnetic chuck 102, a working surface of the electromagnetic chuck 102 is parallel to the side surface of the rack 2, the rack 2 can be directly grabbed after the rack 2 is milled, and invalid actions of the second grabbing mechanism 11 are reduced.
The embodiment of the utility model provides an in, mill mechanism 6 and be equipped with two, when clamping mechanism 5 presss from both sides tightly rack 2, mill mechanism 6 and be located 2 terminal surfaces of rack respectively. In the prior art, the two end faces are processed in a universal processing center in multiple steps, and the two end faces can be processed only by being disassembled and assembled for multiple times. This application rack terminal surface finish milling equipment mills simultaneously to two terminal surfaces finish mills, under the prerequisite of guaranteeing 2 length size precision of rack, straightness that hangs down, has still improved 2 parallels of rack, and machining efficiency is high simultaneously.
Further, the milling mechanism 6 includes a tool holder 61, and a tool 62 provided on the tool holder 61. Preferably, the cutter 62 is a disc cutter, so that the end face of the rack 2 can be machined and formed at one time without joint marks, and the machining precision is improved. The cutter head is provided with a plurality of blades, and the end surface of the cutter head is parallel to the end surface of the rack 2. Furthermore, a driving mechanism is further arranged, and the driving mechanism can drive the cutter head to be close to or far away from the end face of the rack 2 so as to meet the requirement of finish milling of the end faces of the racks 2 with different lengths.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts in the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a rack terminal surface finish milling equipment which characterized in that includes: a working table (1),
a first conveying mechanism (3) which is used for grabbing the rack (2) and then conveying the rack to the workbench (1),
a positioning tooth (4) which is arranged on the workbench (1) and is matched with the rack (2), wherein the teeth of the positioning tooth (4) are arranged in the lateral direction,
a clamping mechanism (5) for clamping the rack (2),
and a milling mechanism (6) for machining the clamped rack (2).
2. Rack face finish milling apparatus according to claim 1, characterized in that the rack (2) face finish milling apparatus comprises: a frame body (7),
a linear guide rail (8) arranged on the frame body (7),
and a slide block (9) arranged in a sliding manner with the linear guide rail (8);
and the first grabbing mechanism (10) is connected with the sliding block (9), and the first grabbing mechanism (10) is used for grabbing the rack (2).
3. The rack end face finish milling device according to claim 2, characterized in that the first grabbing mechanism (10) comprises an arm support (101), the arm support (101) is connected with the slide block (9), and an electromagnetic chuck (102) is arranged at the lower end of the arm support (101).
4. Rack face finish milling equipment according to claim 3, characterized in that a rotary piece (103) is provided on the first gripping mechanism (10), the rotary piece (103) being capable of rotating the electromagnetic chuck (102).
5. Rack face finish milling apparatus as claimed in claim 1,
the clamping mechanism (5) comprises an air cylinder (51), the air cylinder (51) and the positioning teeth (4) are arranged oppositely, and an output shaft of the air cylinder (51) and the positioning teeth (4) clamp the rack (2) together.
6. The rack face finish milling apparatus according to claim 5, characterized in that:
the spring is sleeved on the output shaft of the air cylinder (51), and when the output shaft of the air cylinder (51) extends, the spring is in a compressed state.
7. The rack face finish-milling apparatus according to claim 2, characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
and a second grabbing mechanism (11) for grabbing and transferring the rack (2) with the end face finely milled from the workbench (1).
8. The rack end face finish milling equipment according to claim 7, wherein the second grabbing mechanism (11) comprises an arm support (101), the arm support (101) is connected with the sliding block (9), and an electromagnetic chuck (102) is arranged at the lower end of the arm support (101).
9. Rack face finish milling apparatus according to any one of claims 1 to 8,
the two milling mechanisms (6) are arranged, and when the clamping mechanism (5) clamps the rack (2), the milling mechanisms (6) are respectively positioned on the end faces of the rack (2).
10. Rack face finish milling apparatus as claimed in claim 9,
the milling mechanism (6) comprises a tool rest (61) and a cutter (62) arranged on the tool rest (61).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920288609.1U CN209886755U (en) | 2019-03-07 | 2019-03-07 | Rack end face finish milling equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920288609.1U CN209886755U (en) | 2019-03-07 | 2019-03-07 | Rack end face finish milling equipment |
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| Publication Number | Publication Date |
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| CN209886755U true CN209886755U (en) | 2020-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920288609.1U Active CN209886755U (en) | 2019-03-07 | 2019-03-07 | Rack end face finish milling equipment |
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| CN (1) | CN209886755U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112192242A (en) * | 2020-10-19 | 2021-01-08 | 湖南昱升科技发展有限责任公司 | Automatic drilling equipment for elevator rack |
| CN112192241A (en) * | 2020-10-19 | 2021-01-08 | 湖南昱升科技发展有限责任公司 | Drilling equipment for elevator rack |
| CN112570815A (en) * | 2020-11-28 | 2021-03-30 | 浙江索特传动科技有限公司 | Rack grinding tool and using method |
| CN115780915A (en) * | 2022-11-23 | 2023-03-14 | 昆山德系智能装备有限公司 | Rack chamfering device |
-
2019
- 2019-03-07 CN CN201920288609.1U patent/CN209886755U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112192242A (en) * | 2020-10-19 | 2021-01-08 | 湖南昱升科技发展有限责任公司 | Automatic drilling equipment for elevator rack |
| CN112192241A (en) * | 2020-10-19 | 2021-01-08 | 湖南昱升科技发展有限责任公司 | Drilling equipment for elevator rack |
| CN112192241B (en) * | 2020-10-19 | 2024-06-11 | 湖南昱升科技发展有限责任公司 | Drilling equipment for elevator racks |
| CN112570815A (en) * | 2020-11-28 | 2021-03-30 | 浙江索特传动科技有限公司 | Rack grinding tool and using method |
| CN112570815B (en) * | 2020-11-28 | 2021-11-09 | 浙江索特传动科技有限公司 | Rack grinding tool and using method |
| CN115780915A (en) * | 2022-11-23 | 2023-03-14 | 昆山德系智能装备有限公司 | Rack chamfering device |
| CN115780915B (en) * | 2022-11-23 | 2024-08-30 | 昆山德系智能装备有限公司 | Rack chamfering device |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220420 Address after: 415701 group 23, Guanyinqiao village, Zoushi Town, Taoyuan County, Changde City, Hunan Province Patentee after: Hunan Yusheng Technology Development Co.,Ltd. Address before: 422100 Qili Mountain Gardening Farm, Shaoyang County, Shaoyang City, Hunan Province Patentee before: SHAOYANG ZHENHUA MACHINERY FORGING FITTING Co.,Ltd. |
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| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Hunan yuliangsheng Machinery Co.,Ltd. Assignor: Hunan Yusheng Technology Development Co.,Ltd. Contract record no.: X2023980040851 Denomination of utility model: A rack end face precision milling equipment Granted publication date: 20200103 License type: Common License Record date: 20230905 |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230920 Address after: 415700 group 23, Guanyinqiao village, Zoushi Town, Taoyuan County, Changde City, Hunan Province Patentee after: Hunan yuliangsheng Machinery Co.,Ltd. Address before: 415701 group 23, Guanyinqiao village, Zoushi Town, Taoyuan County, Changde City, Hunan Province Patentee before: Hunan Yusheng Technology Development Co.,Ltd. |