CN219004334U - Novel clamping jaw device of pipe expander - Google Patents
Novel clamping jaw device of pipe expander Download PDFInfo
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- CN219004334U CN219004334U CN202223440850.2U CN202223440850U CN219004334U CN 219004334 U CN219004334 U CN 219004334U CN 202223440850 U CN202223440850 U CN 202223440850U CN 219004334 U CN219004334 U CN 219004334U
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Abstract
The utility model discloses a novel clamping jaw device of a tube expander, which comprises a clamping jaw body, wherein the diameter of a clamping inner hole of the clamping jaw body is 7.12MM. According to the utility model, the clamping inner hole of the clamping jaw body is designed to be phi 7.12MM, so that the universalization of accessories such as the clamping jaw sleeve, the connecting rod and the like is realized, and the pipe diameter switching time is reduced from 5 hours to 2 hours; meanwhile, a wide phi 7.749MM and a long 5.7MM clearance giving-up groove are designed at the position of the head 13MM of the clamping jaw body, so that the clamping force is ensured to be larger than the lower expansion resistance, the stress of the clamping jaw guide rail and the lead screw is reduced, and the service life of key parts is prolonged. The research and application of the novel clamping jaw device greatly improve and shorten the machine type switching time, improve the efficiency by 60%, improve the comprehensive utilization rate of equipment by 30%, realize the generalized application of the novel clamping jaw device matched with accessories and achieve the purpose of quickly switching machine types.
Description
Technical Field
The utility model relates to the technical field of tube expanding machines, in particular to a novel clamping jaw device of a tube expanding machine.
Background
The existing shrink-free tube expansion process of the air conditioner heat exchanger is mature in industrial application, the shrinkage of the length of a copper tube is effectively controlled to achieve the purpose of reducing consumption of raw materials and cost, the whole tube expansion process is completed mainly through continuous operation of expanding balls after clamping the copper tube by clamping jaws of a tube expander, the continuous stability of clamping jaws and the clamping clearance with the copper tube directly influence the size of a horn mouth after forming and the qualification rate of A/B dimensions of the heat exchanger, in view of improving equipment universality and reducing pipe diameter switching time of equipment, the switching efficiency and the production efficiency are effectively improved, the clamping jaws are subjected to universal innovation research, meanwhile, the equipment failure rate is effectively controlled and reduced, and the clamping inner holes of the clamping jaws are subjected to technical innovation research improvement.
The air conditioner condenser part relates to a plurality of complicated types, the pipe diameter of the copper pipe relates to phi 7/phi 7.94/phi 9.52, and according to the change of the demand, the equipment is required to be switched between different pipe diameter types under the condition that the equipment resource and the productivity have bottlenecks so as to meet the production demand and meet the market demand with unusual change. In order to meet the demands of orders, delivery and customers, how to solve a series of problems of capacity reduction, efficiency reduction and quality reduction caused by frequent switching of equipment is a subject to be studied for improvement, and a main current problem of large switching of pipe diameters of equipment before improvement is studied:
1. the production schedule is issued by the production team leader, the team leader receives the switching information of the turning machine, determines the turning machine according to the planned execution and completion conditions, and simultaneously, prepares the spare part selection and auxiliary tool at least 1 hour in advance according to the type of the switching machine, so that the external preparation time is long, and the number of projects is related.
2. Spare parts to be replaced and prepared for pipe diameter switching relate to: five items are total, namely a clamping jaw, a clamping jaw connecting rod, a clamping jaw clamping sleeve, an expanding ball and a base, wherein the switching operation is finished for at least 5 hours according to the mode of 2-person step operation by taking the phi 7.94 commercial 60-hole 1+1 model as an example and the phi 7 commercial 60-hole 1+1 model as an example, and the following switching operation list table is adopted;
3. the uncertainty of production plan adjustment, the average of part of equipment is switched 2-3 times per week and 8-12 times per month, and the frequent switching of equipment, disassembly and assembly parts accelerates the abrasion of structural parts of the equipment, and meanwhile, the loss cost of the parts is increased.
4. The utility model provides a quality key control equipment that expand tube machine belongs to two ware subassembly system leak and blocks up, switches the accessory in many positions repeatedly, can cause equipment overall cooperation performance and stability to drop, influences product quality's controllability, has the serious risk that produces batch quality accident, and the copper pipe that the length of copper pipe clamp stress surface was caused by the influence of copper pipe wall thickness uniformity and clamping jaw hole strain clamp the quality hidden danger problem of wound many.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a novel clamping jaw device of a tube expander, and aims to provide a general novel clamping jaw, realize the universal application of matched accessories, achieve the purpose of quickly switching machine types, solve the problems of complex flow and long time of equipment when machine types are switched, quickly realize quick switching and improve the switching efficiency.
The technical scheme adopted for solving the technical problems is as follows: the novel clamping jaw device of the pipe expander comprises a clamping jaw body, wherein the diameter of a clamping inner hole of the clamping jaw body is 7.12MM. The inner hole of the clamping jaw is designed according to 7.12MM, and the efficient and universal production of the equipment is realized under the condition that the copper pipe is ensured not to be damaged by clamping and not to shrink.
As a further improvement of the utility model: the inner side of the head part of the clamping jaw is provided with a clearance giving-up groove.
As a further improvement of the utility model: the distance between the clearance giving-up groove and the head of the clamping jaw is 13MM.
As a further improvement of the utility model: the diameter 7.749MM of the clearance giving groove is 5.7MM long.
As a further improvement of the utility model: the novel clamping jaw device further comprises an expansion rod, and the expansion rod is located in the center of the clamping inner hole of the clamping jaw body.
As a further improvement of the utility model: an expansion ball is arranged at the end part of the expansion rod.
As a further improvement of the utility model: the outer diameter size of the expansion rod is 6MM.
As a further improvement of the utility model: an annular groove is arranged at the outer side of the tail part of the clamping jaw,
as a further improvement of the utility model: the distance between the annular groove and the tail of the clamping jaw is 25MM.
As a further improvement of the utility model: the annular groove is 3MM wide and 0.5MM deep.
Compared with the prior art, the utility model has the beneficial effects that:
1. the clamping inner hole of the clamping jaw body is designed to be phi 7.12MM, so that the universalization of accessories such as the clamping jaw sleeve, the connecting rod and the like is realized, and the pipe diameter switching time is reduced from 5 hours to 2 hours; meanwhile, a wide phi 7.749MM and a long 5.7MM clearance giving-up groove are designed at the position of the head 13MM of the clamping jaw body, so that the clamping force is ensured to be larger than the lower expansion resistance, the stress of the clamping jaw guide rail and the lead screw is reduced, and the service life of key parts is prolonged.
2. The research and application of the novel clamping jaw device greatly improve and shorten the machine type switching time, improve the efficiency by 60%, improve the comprehensive utilization rate of equipment by 30%, realize the generalized application of the novel clamping jaw device matched with accessories and achieve the purpose of quickly switching machine types.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is an enlarged schematic view of a partial structure at a in fig. 1.
Reference numerals: 1. a clamping jaw body; 2. a clearance giving groove; 3. an annular groove.
Detailed Description
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The utility model will now be further described with reference to the accompanying drawings and examples:
referring to fig. 1-2, a novel clamping jaw device of a pipe expander comprises a clamping jaw body 1, wherein the diameter of a clamping inner hole of the clamping jaw body is 7.12MM. Through the stress analysis of the clamping mechanism part of the pipe expander, under the condition that the stress of the clamping mechanism is larger than the clamping force of the clamping jaw, the inner hole of the clamping jaw is designed according to phi 7.12MM, so that the efficient and generalized production of the equipment is realized under the condition that the copper pipe is not clamped or contracted; through system trial and batch verification, the novel clamping jaw device developed completely meets normal use, under the condition that the overall outline dimension of the clamping jaw is kept unchanged, the clamping inner hole dimension optimal design is 7.12MM, the universalization of accessories such as clamping jaw sleeves and connecting rods is realized, the pipe diameter switching time is reduced to 2 hours from 5 hours, the problems that the flow of equipment is complex and the time is long when the equipment is subjected to model switching are solved, quick switching can be realized, and the switching efficiency is improved.
The outer diameter of the clamping jaw body is 7.94MM.
The external dimension and the wall thickness structural stress of the clamping jaw phi 7.94 must be larger than the stress during processing and clamping, the stress is further reduced by about 20% when the external dimension is unchanged and the copper pipe with phi 7 specification is clamped, the design requirements of installation and the external dimension are met and kept unchanged, the switching frequency of accessories is effectively reduced, and the failure rate of equipment is reduced.
The inner side of the head part of the clamping jaw body is provided with a clearance giving way groove 2.
The distance between the clearance giving-up groove and the head of the clamping jaw is 13MM.
The diameter 7.749MM of the clearance giving groove is 5.7MM long.
Through many times of research and verification, kong Rangwei groove phi 7.749X5.7 is avoided in the design of the clamping front section, stress conditions of each pipe are tested according to the largest workpiece, the shrinkage of the copper pipe is not influenced by the added avoidance gaps under the condition that the clamping stress surfaces are stable and balanced, the stability of bell mouth forming after pipe expansion is further improved, and the leakage blocking and after-sale quality of an air conditioning system are steadily improved.
On the premise of ensuring that the clamping force is larger than the lower expansion resistance, the clamping jaw guide rail and the lead screw stress are reduced, and the service life of key parts is prolonged.
The novel clamping jaw device further comprises an expansion rod, and the expansion rod is located in the center of the clamping inner hole of the clamping jaw body. The expansion rod can relatively move up and down in the process of processing the expanded pipe.
An expansion ball is arranged at the end part of the expansion rod.
The outer diameter size of the expansion rod is 6MM.
The size of the unilateral gap between the expansion rod and the clamping jaw directly influences the central offset of the expansion ball and the pipe orifice, the diameter of the clamping inner hole of the clamping jaw body is designed to be 7.12MM according to the length and the deformation of the expansion rod, the unilateral gap is guaranteed to be 0.56MM, the guiding precision and the stability of the pipe inlet are further improved, the concentricity problem of the center of the expansion rod and the center of the pipe orifice is solved, and the problems of pipe orifice beating and product scrapping caused by offset tolerance are avoided.
An annular groove 3 is formed in the outer side of the tail of the clamping jaw body, and the distance between the annular groove 3 and the tail of the clamping jaw is 25MM.
The annular groove is 3MM wide and 0.5MM deep.
An annular groove is designed at the tail 25MM of the clamping jaw body, the width is 3MM, the depth is 0.5MM, and the annular groove is effectively distinguished from clamping jaws of the same type, so that the possibility of material mixing and equipment failure are avoided.
The following is a table of switching schedules for the novel jaw apparatus of the present utility model;
under the condition that the critical overall dimension of the clamping jaw with the diameter of 7.94 is kept unchanged, the clamping inner hole dimension is optimally designed to be phi 7.12MM, the universalization of the clamping jaw sleeve, the connecting rod and other accessories is realized, and the pipe diameter switching time is reduced from 5 hours to 2 hours; meanwhile, a wide phi 7.749MM and a long 5.7MM clearance giving-up groove are designed at the position of the head 13MM of the clamping jaw body, so that the clamping force is ensured to be larger than the lower expansion resistance, the stress of the clamping jaw guide rail and the lead screw is reduced, and the service life of key parts is prolonged.
The research and application of the novel clamping jaw device greatly improve and shorten the machine type switching time, improve the efficiency by 60%, improve the comprehensive utilization rate of equipment by 30%, realize the generalized application of the novel clamping jaw device matched with accessories and achieve the purpose of quickly switching machine types.
Embodiment case one:
the novel clamping jaw device of the pipe expander comprises a clamping jaw body, wherein the diameter of a clamping inner hole of the clamping jaw body is 7.12MM. Through the stress analysis of the clamping mechanism part of the pipe expander, under the condition that the stress of the clamping mechanism is larger than the clamping force of the clamping jaw, the inner hole of the clamping jaw is designed according to phi 7.12MM, so that the efficient and generalized production of the equipment is realized under the condition that the copper pipe is not clamped or contracted; through system trial and batch verification, the novel clamping jaw device developed completely meets normal use, under the condition that the overall outline dimension of the clamping jaw is kept unchanged, the clamping inner hole dimension optimal design is 7.12MM, the universalization of accessories such as clamping jaw sleeves and connecting rods is realized, the pipe diameter switching time is reduced to 2 hours from 5 hours, the problems that the flow of equipment is complex and the time is long when the equipment is subjected to model switching are solved, quick switching can be realized, and the switching efficiency is improved.
Implementation case two:
the novel clamping jaw device of the pipe expander comprises a clamping jaw body, wherein the diameter of a clamping inner hole of the clamping jaw body is 7.12MM. Through the stress analysis of the clamping mechanism part of the pipe expander, under the condition that the stress of the clamping mechanism is larger than the clamping force of the clamping jaw, the inner hole of the clamping jaw is designed according to phi 7.12MM, so that the efficient and generalized production of the equipment is realized under the condition that the copper pipe is not clamped or contracted; through system trial and batch verification, the novel clamping jaw device developed completely meets normal use, under the condition that the overall outline dimension of the clamping jaw is kept unchanged, the clamping inner hole dimension optimal design is 7.12MM, the universalization of accessories such as clamping jaw sleeves and connecting rods is realized, the pipe diameter switching time is reduced to 2 hours from 5 hours, the problems that the flow of equipment is complex and the time is long when the equipment is subjected to model switching are solved, quick switching can be realized, and the switching efficiency is improved.
The outer diameter of the clamping jaw body is 7.94MM. The external dimension and the wall thickness structural stress of the clamping jaw phi 7.94 must be larger than the stress during processing and clamping, the stress is further reduced by about 20% when the external dimension is unchanged and the copper pipe with phi 7 specification is clamped, the design requirements of installation and the external dimension are met and kept unchanged, the switching frequency of accessories is effectively reduced, and the failure rate of equipment is reduced.
The inner side of the head part of the clamping jaw body is provided with a clearance giving way groove. The distance between the clearance giving-up groove and the head of the clamping jaw is 13MM. The diameter 7.749MM of the clearance giving groove is 5.7MM long. The Kong Rangwei groove phi 7.749X5.7 is avoided in the design of the clamping front section, the stress condition of each pipe is tested according to the maximum workpiece, the shrinkage of the copper pipe is not influenced by the increased gap avoidance under the condition that the stable and balanced clamping stress surface is ensured, the stability of bell mouth forming after pipe expansion is further improved, and the leakage blocking and after-sale quality of an air conditioning system are steadily improved. On the premise of ensuring that the clamping force is larger than the lower expansion resistance, the clamping jaw guide rail and the lead screw stress are reduced, and the service life of key parts is prolonged.
Implementation case three:
the novel clamping jaw device of the pipe expander comprises a clamping jaw body, wherein the diameter of a clamping inner hole of the clamping jaw body is 7.12MM. Through the stress analysis of the clamping mechanism part of the pipe expander, under the condition that the stress of the clamping mechanism is larger than the clamping force of the clamping jaw, the inner hole of the clamping jaw is designed according to phi 7.12MM, so that the efficient and generalized production of the equipment is realized under the condition that the copper pipe is not clamped or contracted; through system trial and batch verification, the novel clamping jaw device developed completely meets normal use, under the condition that the overall outline dimension of the clamping jaw is kept unchanged, the clamping inner hole dimension optimal design is 7.12MM, the universalization of accessories such as clamping jaw sleeves and connecting rods is realized, the pipe diameter switching time is reduced to 2 hours from 5 hours, the problems that the flow of equipment is complex and the time is long when the equipment is subjected to model switching are solved, quick switching can be realized, and the switching efficiency is improved. The outer diameter of the clamping jaw body is 7.94MM. The external dimension and the wall thickness structural stress of the clamping jaw phi 7.94 must be larger than the stress during processing and clamping, the stress is further reduced by about 20% when the external dimension is unchanged and the copper pipe with phi 7 specification is clamped, the design requirements of installation and the external dimension are met and kept unchanged, the switching frequency of accessories is effectively reduced, and the failure rate of equipment is reduced. The inner side of the head part of the clamping jaw body is provided with a clearance giving way groove. The distance between the clearance giving-up groove and the head of the clamping jaw is 13MM. The diameter 7.749MM of the clearance giving groove is 5.7MM long. The Kong Rangwei groove phi 7.749X5.7 is avoided in the design of the clamping front section, the stress condition of each pipe is tested according to the maximum workpiece, the shrinkage of the copper pipe is not influenced by the increased gap avoidance under the condition that the stable and balanced clamping stress surface is ensured, the stability of bell mouth forming after pipe expansion is further improved, and the leakage blocking and after-sale quality of an air conditioning system are steadily improved. On the premise of ensuring that the clamping force is larger than the lower expansion resistance, the clamping jaw guide rail and the lead screw stress are reduced, and the service life of key parts is prolonged.
The novel clamping jaw device further comprises an expansion rod, and the expansion rod is located in the center of the clamping inner hole of the clamping jaw body. The expansion rod can relatively move up and down in the process of processing the expanded pipe. An expansion ball is arranged at the end part of the expansion rod. The outer diameter size of the expansion rod is 6MM. The size of the unilateral gap between the expansion rod and the clamping jaw directly influences the central offset of the expansion ball and the pipe orifice, the diameter of the clamping inner hole of the clamping jaw body is designed to be 7.12MM according to the length and the deformation of the expansion rod, the unilateral gap is guaranteed to be 0.56MM, the guiding precision and the stability of the pipe inlet are further improved, the concentricity problem of the center of the expansion rod and the center of the pipe orifice is solved, and the problems of pipe orifice beating and product scrapping caused by offset tolerance are avoided.
Implementation case four:
the novel clamping jaw device of the pipe expander comprises a clamping jaw body, wherein the diameter of a clamping inner hole of the clamping jaw body is 7.12MM. Through the stress analysis of the clamping mechanism part of the pipe expander, under the condition that the stress of the clamping mechanism is larger than the clamping force of the clamping jaw, the inner hole of the clamping jaw is designed according to phi 7.12MM, so that the efficient and generalized production of the equipment is realized under the condition that the copper pipe is not clamped or contracted; through system trial and batch verification, the novel clamping jaw device developed completely meets normal use, under the condition that the overall outline dimension of the clamping jaw is kept unchanged, the clamping inner hole dimension optimal design is 7.12MM, the universalization of accessories such as clamping jaw sleeves and connecting rods is realized, the pipe diameter switching time is reduced to 2 hours from 5 hours, the problems that the flow of equipment is complex and the time is long when the equipment is subjected to model switching are solved, quick switching can be realized, and the switching efficiency is improved. The outer diameter of the clamping jaw body is 7.94MM. The external dimension and the wall thickness structural stress of the clamping jaw phi 7.94 must be larger than the stress during processing and clamping, the stress is further reduced by about 20% when the external dimension is unchanged and the copper pipe with phi 7 specification is clamped, the design requirements of installation and the external dimension are met and kept unchanged, the switching frequency of accessories is effectively reduced, and the failure rate of equipment is reduced. The inner side of the head part of the clamping jaw body is provided with a clearance giving way groove. The distance between the clearance giving-up groove and the head of the clamping jaw is 13MM. The diameter 7.749MM of the clearance giving groove is 5.7MM long. The Kong Rangwei groove phi 7.749X5.7 is avoided in the design of the clamping front section, the stress condition of each pipe is tested according to the maximum workpiece, the shrinkage of the copper pipe is not influenced by the increased gap avoidance under the condition that the stable and balanced clamping stress surface is ensured, the stability of bell mouth forming after pipe expansion is further improved, and the leakage blocking and after-sale quality of an air conditioning system are steadily improved. On the premise of ensuring that the clamping force is larger than the lower expansion resistance, the clamping jaw guide rail and the lead screw stress are reduced, and the service life of key parts is prolonged. The novel clamping jaw device further comprises an expansion rod, and the expansion rod is located in the center of the clamping inner hole of the clamping jaw body. The expansion rod can relatively move up and down in the process of processing the expanded pipe. An expansion ball is arranged at the end part of the expansion rod. The outer diameter size of the expansion rod is 6MM. The size of the unilateral gap between the expansion rod and the clamping jaw directly influences the central offset of the expansion ball and the pipe orifice, the diameter of the clamping inner hole of the clamping jaw body is designed to be 7.12MM according to the length and the deformation of the expansion rod, the unilateral gap is guaranteed to be 0.56MM, the guiding precision and the stability of the pipe inlet are further improved, the concentricity problem of the center of the expansion rod and the center of the pipe orifice is solved, and the problems of pipe orifice beating and product scrapping caused by offset tolerance are avoided.
An annular groove is formed in the outer side of the tail of the clamping jaw body, and the distance between the annular groove and the tail of the clamping jaw is 25MM. The annular groove is 3MM wide and 0.5MM deep. An annular groove is designed at the tail 25MM of the clamping jaw, the width is 3MM, the depth is 0.5MM, and the annular groove is effectively distinguished from clamping jaws of the same type, so that the possibility of material mixing and equipment failure are avoided.
The main functions of the utility model are as follows:
under the condition that the key outline dimension of the clamping jaw with the diameter of 7.94 is kept unchanged, the clamping inner hole dimension is optimally designed to be phi 7.12MM, so that the universalization of accessories such as the clamping jaw sleeve, the connecting rod and the like is realized, and the pipe diameter switching time is reduced from 5 hours to 2 hours; meanwhile, a wide phi 7.749MM and a long 5.7MM clearance giving-up groove are designed at the position of the head 13MM of the clamping jaw body, so that the clamping force is ensured to be larger than the lower expansion resistance, the stress of the clamping jaw guide rail and the lead screw is reduced, and the service life of key parts is prolonged. The research and application of the novel clamping jaw device greatly improve and shorten the machine type switching time, improve the efficiency by 60%, improve the comprehensive utilization rate of equipment by 30%, realize the generalized application of the novel clamping jaw device matched with accessories and achieve the purpose of quickly switching machine types.
In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper end face", "lower end face", "top", "bottom", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description of the present utility model, and therefore should not be construed as limiting the actual use direction of the present utility model.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description.
Claims (10)
1. The utility model provides a novel clamping jaw device of expand tube machine which characterized in that: the clamping jaw comprises a clamping jaw body, wherein the diameter of a clamping inner hole of the clamping jaw body is 7.12MM.
2. A new type jaw apparatus for a tube expander according to claim 1, characterized in that: the inner side of the head part of the clamping jaw is provided with a clearance giving-up groove.
3. A new type jaw apparatus for a tube expander according to claim 2, characterized in that: the distance between the clearance giving-up groove and the head of the clamping jaw is 13MM.
4. A novel jaw apparatus of a tube expander as claimed in claim 3, wherein: the diameter 7.749MM of the clearance giving groove is 5.7MM long.
5. A new type jaw apparatus for a tube expander according to claim 1, characterized in that: the novel clamping jaw device further comprises an expansion rod, and the expansion rod is located in the center of the clamping inner hole of the clamping jaw body.
6. A novel jaw apparatus of a tube expander as claimed in claim 5, wherein: an expansion ball is arranged at the end part of the expansion rod.
7. A novel jaw apparatus of a tube expander as claimed in claim 6, wherein: the outer diameter size of the expansion rod is 6MM.
8. A new type jaw apparatus for a tube expander according to claim 1, characterized in that: an annular groove is formed in the outer side of the tail of the clamping jaw.
9. A novel jaw apparatus of a tube expander as claimed in claim 8, wherein: the distance between the annular groove and the tail of the clamping jaw is 25MM.
10. A new type jaw apparatus for a tube expander according to claim 9 and wherein: the annular groove is 3MM wide and 0.5MM deep.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223440850.2U CN219004334U (en) | 2022-12-22 | 2022-12-22 | Novel clamping jaw device of pipe expander |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223440850.2U CN219004334U (en) | 2022-12-22 | 2022-12-22 | Novel clamping jaw device of pipe expander |
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| Publication Number | Publication Date |
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| CN219004334U true CN219004334U (en) | 2023-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223440850.2U Active CN219004334U (en) | 2022-12-22 | 2022-12-22 | Novel clamping jaw device of pipe expander |
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| CN (1) | CN219004334U (en) |
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- 2022-12-22 CN CN202223440850.2U patent/CN219004334U/en active Active
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