Clamp jaw device for tube expander

Abstract

The application discloses a kind of clamping jaw devices of pipe expander, including clamping jaw body, the diameter of the clamping inner hole of the clamping jaw body is 7.12MM.The application is by the size design of the clamping inner hole of clamping jaw body is Φ7.12MM, realize the universalization of clamping jaw sleeve and connecting rod etc., pipe diameter switching time drops to 2 hours from 5 hours;While in the head 13MM position of clamping jaw body design wide Φ7.749MM, long 5.7MM avoidance let slot, under the premise of guaranteeing clamping force greater than lower inflation resistance, reduce the stress of clamping jaw guide rail and screw, prolong the service life of key position.The research and application of the novel clamping jaw device of the application greatly shorten the model switching time, efficiency is improved by 60%, the comprehensive utilization rate of equipment is improved by 30%, realize its universal application with accessory, reach the purpose of quick switching model.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe expander, in particular to a clamping jaw device of pipe expander. BACKGROUND

[0002] At present, the non-shrinkage pipe expansion process of air conditioner heat exchanger is relatively mature in industry application. The application of this process mainly controls the shrinkage of copper pipe length to reduce the consumption of raw materials and reduce the cost. The whole pipe expansion process is completed through the clamping of the pipe expander jaw and the continuous operation of the expansion ball. The continuous stability of the clamping jaw and the clamping gap with the copper pipe directly affect the size of the horn mouth after forming and the qualification rate of the heat exchanger A / B size. In view of improving the universality of the equipment and reducing and decreasing the pipe diameter switching time of the equipment, effectively improving the switching efficiency and production efficiency, the clamping jaw is innovated in universality, and at the same time, in order to reduce the influence of the excessive force of the clamping jaw on the service life of the clamping guide mechanism and effectively control and reduce the equipment failure rate, the inner hole of the clamping jaw is innovated in technology.

[0003] The air conditioner condenser components involve many and complex models, and the copper pipe diameters involve Ф7 / Ф7.94 / Ф9.52, which are three kinds. According to the demand changes, the equipment needs to be switched to different pipe diameter models under the condition of equipment resources and capacity bottleneck to meet the production demand. In order to meet the order delivery and customer demand, how to solve the problems of capacity reduction, efficiency reduction and quality decline caused by frequent switching of the equipment is a research topic that needs to be improved. Before the research and improvement, the main status of the equipment during the large pipe diameter switching is as follows:

[0004] 1. The production plan is given by the production team leader, and the team leader determines the switching machine according to the plan execution and completion after receiving the switching information. At the same time, at least 1 hour in advance, the spare parts selection and auxiliary tool preparation are done according to the switching model. The external preparation time is long and involves many projects.

[0005] 2. The spare parts involved in the pipe diameter switching need to be replaced and prepared, including clamping jaw, clamping jaw connecting rod, clamping jaw clamping sleeve, expansion ball and base, a total of five items. Taking the switching from Ф7.94 commercial 60-hole 1+1 model to Ф7 commercial 60-hole 1+1 model as an example, at least 5 hours are needed to complete the switching work according to the mode of 2 people working step by step. The following is the switching work list table.

[0006]

[0007] 3. Due to the uncertainty of production plan adjustment, some equipment is switched 2-3 times on average every week, 8-12 times a month. Frequent switching of equipment disassembles and assembles parts, which accelerates the wear of structural parts of the equipment and increases the cost of part loss.

[0008] 4. The tube expander is a key quality control device for leak plugging in the two-component system. Repeatedly switching parts in multiple locations will cause a decline in the overall performance and stability of the equipment, affecting the controllability of product quality and posing a serious risk of batch quality accidents. The length of the copper tube clamping force surface is affected by the consistency of the copper tube wall thickness, which can cause many quality problems such as scratches and clamping damage between the outer wall of the copper tube and the inner hole of the clamp. Summary of the Invention

[0009] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a clamping device for a tube expander, which aims to provide a universal new type of clamping device to realize the universal application of its matching accessories, achieve the purpose of rapid switching of machine models, solve the problem of complex process and long time when switching machines, and can quickly realize fast switching and improve switching efficiency.

[0010] The technical solution adopted by this invention to solve its technical problem is: a clamping device for a tube expander, comprising a clamping body, wherein the diameter of the clamping inner hole of the clamping body is 7.12 mm, and the clamping body is used in the process of switching from a Ф7.94 clamping jaw to a Ф7 clamping jaw, wherein the outer diameter of the clamping body is the same as the outer diameter of the Ф7.94 clamping jaw. Designing the inner hole of the clamping jaw to 7.12 mm ensures that the copper tube is not damaged or shrinked, thus achieving efficient and standardized production of the equipment.

[0011] As a further improvement of the present invention: the inner side of the head of the gripper is provided with a clearance groove.

[0012] As a further improvement of the present invention: the distance between the clearance groove and the gripper head is 13 mm.

[0013] As a further improvement of the present invention: the clearance groove has a diameter of 7.749 mm and a length of 5.7 mm.

[0014] As a further improvement of the present invention, the novel gripper device further includes an expansion rod located at the center of the clamping inner hole of the gripper body.

[0015] As a further improvement of the present invention: an expansion ball is installed at the end of the expansion rod.

[0016] As a further improvement of the present invention, the outer diameter of the expansion rod is 6 mm.

[0017] As a further improvement of the present invention: an annular groove is provided on the outer side of the tail of the gripper.

[0018] As a further improvement of the present invention: the distance between the annular groove and the tail of the gripper is 25 mm.

[0019] As a further improvement of the present invention: the width of the annular groove is 3 mm and the depth is 0.5 mm.

[0020] Compared with the prior art, the present application has the following advantages:

[0021] 1. The present application designs the clamping inner hole size of the clamp body as Ф7.12MM, realizes the universalization of the clamp sleeve and connecting rod and other accessories, and reduces the pipe diameter switching time from 5 hours to 2 hours; meanwhile, a wide Ф7.749MM and long 5.7MM empty space slot is designed at the 13MM position of the head of the clamp body, which reduces the stress of the clamp guide rail and screw on the premise of ensuring that the clamping force is greater than the down-expanding resistance, prolongs the service life of the key parts.

[0022] 2. The research and application of the novel clamp device greatly improve and shorten the model switching time, improve the efficiency by 60%, improve the comprehensive utilization rate of the equipment by 30%, realize the universalization of the matching accessories, and achieve the purpose of rapid switching of the model. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The present application is a structural schematic diagram.

[0024] Figure 2 is Figure 1 The present application is a structural schematic diagram.

[0025] The drawing legend is: 1, clamp body; 2, empty space slot; 3, annular groove. DETAILED DESCRIPTION

[0026] In this document, relational terms such as first and second and the like can 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. Moreover, 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 can include other elements not expressly listed or inherent to such process, method, article, or apparatus. The present application will be further described by way of example with reference to the accompanying drawings:

[0027] Please refer to Figures 1-2 A clamp device of an expander, comprising a clamp body 1, the diameter of the clamping inner hole of the clamp body is 7.12MM, the clamp body is applied to the process of switching from a Ф7.94 clamp to a Ф7 clamp, and the outer diameter of the clamp body is the same as that of the Ф7.94 clamp.

[0028] Through stress analysis of the clamping mechanism part of the pipe expander, in the case that the stress of the clamping mechanism is greater than the clamping force of the clamping jaw, the inner hole of the clamping jaw is designed as Φ7.12MM, which can ensure that the copper pipe is not damaged and not shrunk, and realize efficient and universal production of the equipment; through system trial and batch verification, the developed new type of clamping jaw device completely meets the normal use, the clamping inner hole size is optimized to 7.12MM under the condition that the overall size of the clamping jaw remains unchanged, the universalization of the clamping jaw sleeve and connecting rod and other accessories is realized, the pipe diameter switching time is reduced from 5 hours to 2 hours, the problem of complex process and long time during equipment model switching is solved, and fast switching can be realized quickly to improve the switching efficiency.

[0029] The stress of the outer size and wall thickness structure of the Φ7.94 clamping jaw must be greater than the stress during clamping processing, and the stress is further reduced by about 20% under the condition that the outer size remains unchanged and the clamping processing Φ7 specification copper pipe, which meets the design requirements of installation and unchanged outer size, effectively reduces the accessory switching frequency, and reduces the equipment failure rate.

[0030] The inner side of the head of the clamping jaw body is provided with an empty avoiding slot 2.

[0031] The distance between the empty avoiding slot and the head of the clamping jaw is 13MM.

[0032] The diameter of the empty avoiding slot is 7.749MM, and the length is 5.7MM.

[0033] Through repeated research and verification, the Φ7.749X5.7 avoiding hole slot is designed in the front part of the clamping, the stress of each pipe is tested according to the maximum workpiece, and under the condition that the clamping stress surface is stable and balanced, the added empty space does not affect the copper pipe shrinkage, the stability of the horn mouth forming after pipe expansion is further improved, and the air conditioning system leakage and after-sales quality are steadily improved.

[0034] Under the premise that the clamping force is greater than the resistance of the lower expansion, the stress of the clamping jaw guide rail and screw is reduced, and the service life of the key parts is prolonged.

[0035] The new type of clamping jaw device further comprises an expansion rod, which is located at the center of the clamping inner hole of the clamping jaw body. The expansion rod realizes relative up and down operation during the processing of pipe expansion.

[0036] The end of the expansion rod is provided with an expansion ball.

[0037] The outer diameter size of the expansion rod is 6MM.

[0038] The size of the single-side gap between the expansion rod and the clamping jaw directly affects the center offset between the expansion ball and the pipe opening, according to the length of the expansion rod and the deformation amount, the diameter of the clamping inner hole of the clamping jaw body is designed as 7.12MM, the single-side gap is ensured to be 0.56MM, the guiding accuracy and stability of the pipe opening are further improved, the concentricity problem between the center of the expansion rod and the center of the pipe opening is solved, and the problems of hitting the pipe opening and causing product scrap caused by the offset tolerance are avoided.

[0039] The tail part of the clamping jaw body is provided with an annular groove 3, and the distance between the annular groove 3 and the tail part of the clamping jaw is 25MM.

[0040] The width of the annular groove is 3MM, and the depth is 0.5MM.

[0041] The annular groove is designed at the tail part of the clamping jaw body 25MM wide, 3MM wide and 0.5MM deep, which effectively distinguishes the same type of clamping jaw and avoids the possibility of material mixing and equipment failure.

[0042] The following is the switching work list table of the novel clamping jaw device of the application;

[0043]

[0044] In the case that the key outer dimension of the Ф7.94 clamping jaw remains unchanged, the clamping inner hole size is optimized and designed as Ф7.12MM, the universalization of the clamping jaw sleeve and connecting rod and other accessories is realized, the pipe diameter switching time is reduced from 5 hours to 2 hours; meanwhile, a wide Ф7.749MM, long 5.7MM empty slot is designed at the head part of the clamping jaw body 13MM position, under the premise that the clamping force is greater than the expansion resistance, the stress of the clamping guide rail and the screw is reduced, and the service life of the key parts is prolonged.

[0045] The research and application of the novel clamping jaw device of the application greatly shorten the model switching time, the efficiency is improved by 60%, the comprehensive utilization rate of the equipment is improved by 30%, the universalization of the matching accessories is realized, and the purpose of rapid switching of the model is achieved.

[0046] Case 1:

[0047] The utility model provides a kind of expanding pipe machine's clamping jaw device, including clamping jaw body, the diameter of the clamping inner hole of the clamping jaw body is 7.12MM.

[0048] Case two:

[0049] The utility model provides a kind of expanding pipe machine's clamping jaw device, including clamping jaw body, the diameter of the clamping inner hole of the clamping jaw body is 7.12MM. After force analysis to the force of the clamping mechanism part of expanding pipe machine, in the case where the force of clamping mechanism is greater than the clamping force of clamping jaw, the clamping inner hole of clamping jaw is designed as 7.12MM, to realize the high-efficiency generalization production of equipment under the condition of guaranteeing that copper pipe is not clamped and not shrunk;Through system trial and batch verification, the developed new type of clamping jaw device completely meets normal use, the clamping inner hole size is optimized to 7.12MM under the condition that the overall size of clamping jaw remains unchanged, realizes the generalization of clamping jaw sleeve and connecting rod and other accessories, the pipe diameter switching time is reduced from 5 hours to 2 hours, solves the problems of complex process and long time when equipment is switched, can quickly realize quick switching, and improves switching efficiency.

[0050] The outer diameter of the clamping jaw body is the same as that of the Φ7.94 clamping jaw. The stress of the outer size and wall thickness structure of the Φ7.94 clamping jaw must be greater than the stress during clamping processing. When the outer size remains unchanged and the Φ7 copper pipe is clamped and processed, the stress is further reduced by about 20%, meeting the design requirements of installation and unchanged outer size, effectively reducing the switching frequency of accessories and reducing the equipment failure rate.

[0051] The head inner side of the clamping jaw body is provided with an empty-avoiding displacement groove. The distance between the empty-avoiding displacement groove and the head of the clamping jaw is 13MM. The diameter of the empty-avoiding displacement groove is 7.749MM, and the length is 5.7MM. An empty-avoiding displacement groove Φ7.749X5.7 is designed before clamping, and the stress of each pipe is tested according to the maximum workpiece, under the condition of guaranteeing that the clamping stress surface is stable and balanced, the added empty-avoiding displacement does not affect the copper pipe shrinkage, the stability of the horn-shaped mouth after pipe expansion is further improved, and the air conditioning system leakage and after-sales quality are steadily improved. Under the premise that the clamping force is greater than the expansion resistance, the stress of the clamping jaw guide rail and lead screw is reduced, and the service life of the key parts is prolonged.

[0052] Case three:

[0053] A clamping jaw device of a pipe expander includes a clamping jaw body, and a diameter of a clamping inner hole of the clamping jaw body is 7.12 mm. Through force analysis on a clamping mechanism part of the pipe expander, in a case that a force on the clamping mechanism is greater than a clamping force of the clamping jaw, the clamping inner hole is designed as Φ7.12 mm, so that efficient and universal production of the equipment is realized under the condition that the copper pipe is not damaged and not shrunk. Through system trial and batch verification, the developed new clamping jaw device completely meets normal use, the clamping inner hole size is optimally designed as 7.12 mm under the condition that the overall size of the clamping jaw remains unchanged, the universalization of the clamping jaw sleeve and connecting rod and other accessories is realized, the pipe diameter switching time is reduced from 5 hours to 2 hours, the problems of complex process and long time during model switching of the equipment are solved, fast switching can be quickly realized, and switching efficiency is improved. The outer diameter of the clamping jaw body is the same as that of a Φ7.94 clamping jaw. The stress of the outer size and wall thickness structure of the Φ7.94 clamping jaw must be greater than the stress during clamping processing, the stress is further reduced by about 20% under the condition that the outer size remains unchanged and the copper pipe of Φ7 specification is clamped and processed, the design requirement of installation and unchanged outer size is met, the frequency of accessory switching is effectively reduced, and the equipment failure rate is reduced. An empty avoiding slot is arranged on the inner side of the head of the clamping jaw body. The distance between the empty avoiding slot and the head of the clamping jaw is 13 mm. The diameter of the empty avoiding slot is 7.749 mm, and the length is 5.7 mm. The empty avoiding slot Φ7.749X5.7 is designed before clamping, the stress of each pipe is tested according to the maximum workpiece, the increased empty avoiding position does not affect the copper pipe shrinkage under the condition that the clamping stress surface is stable and balanced, the stability of the horn mouth formed after pipe expansion is further improved, the air conditioning system leakage is blocked, and the after-sales quality is steadily improved. Under the premise that the clamping force is greater than the expansion resistance, the stress of the clamping jaw guide rail and screw is reduced, and the service life of the key position is prolonged.

[0054] The new clamping jaw device further includes an expansion rod, and the expansion rod is located at the center of the clamping inner hole of the clamping jaw body. The expansion rod realizes relative up and down operation during pipe expansion processing. An expansion ball is installed at the end of the expansion rod. The outer diameter size of the expansion rod is 6 mm. The size of the single-side gap between the expansion rod and the clamping jaw directly affects the center offset of the expansion ball and the pipe opening, the diameter of the clamping inner hole of the clamping jaw body is designed as 7.12 mm according to the length and deformation of the expansion rod, the single-side gap is ensured to be 0.56 mm, the guiding accuracy and stability of the pipe opening are further improved, the concentricity problem of the center of the expansion rod and the center of the pipe opening is solved, and the problems of pipe opening caused by the offset tolerance and product scrap are avoided.

[0055] Case four:

[0056] The utility model provides a kind of expanding machine's clamping jaw device, including the clamping jaw body, the diameter of the clamping jaw body's clamping inner hole is 7.12MM.Through the force analysis of the clamping mechanism part of expanding machine, in the case where the force of clamping mechanism is greater than the clamping force of clamping jaw, the inner hole of clamping jaw is designed as 7.12MM, in the case where guaranteeing copper pipe is not clamped and is not contracted, the high-efficiency generalization production of equipment is realized;Through system trial and batch verification, the new type of clamping jaw device developed meets normal use, in the case where the overall size of clamping jaw remains unchanged, the clamping inner hole size is optimized and designed as 7.12MM, realizes the generalization of clamping jaw sleeve and connecting rod and other accessories, pipe diameter switching time is reduced from 5 hours to 2 hours, solve the problem that equipment is complex in process and long in time when model switching, can realize quick switching, improve switching efficiency.The outer diameter of the clamping jaw body is same with the outer diameter of 7.94 clamping jaw.The stress of the outer size and wall thickness structure of 7.94 clamping jaw must be greater than the stress when processing clamping, in the case where the overall size remains unchanged and the copper pipe of 7 specification is clamped and processed, the stress is further reduced by about 20%, meet the design requirement of installation and overall size remaining unchanged, effectively reduce the frequency of accessory switching, reduce the failure rate of equipment.The head inner side of the clamping jaw body is equipped with empty-avoiding slot.The distance between the empty-avoiding slot and the head of clamping jaw is 13MM.The diameter of the empty-avoiding slot is 7.749MM, and the length is 5.7MM.The empty-avoiding slot of 7.749X5.7 is designed before clamping, according to the maximum workpiece, the stress condition of each pipe is tested, in the case where guaranteeing the stability and balance of clamping stress surface, the added empty-avoiding position does not affect the copper pipe contraction amount, the stability of horn mouth forming after expanding is further improved, air conditioning system leakage and after-sales quality are steadily improved.Under the premise that clamping force is greater than the resistance of lower expansion, reduce the stress of clamping jaw guide rail and screw, prolong the service life of key parts.The new type of clamping jaw device further includes expanding rod, and the expanding rod is located at the center of the clamping inner hole of the clamping jaw body.The expanding rod realizes relative up and down operation in the process of processing expansion pipe.The end of the expanding rod is equipped with expanding ball.The outer diameter size of the expanding rod is 6MM.The size of the single-side gap between the expanding rod and clamping jaw directly affects the center deviation of expanding ball and pipe mouth, according to the length and deformation amount of expanding rod, the diameter of the clamping inner hole of clamping jaw body is designed as 7.12MM, the single-side gap is guaranteed to be 0.56MM, the guiding accuracy and stability of inlet pipe mouth are further improved, solve the concentricity problem of the center of expanding rod and the center of pipe mouth, avoid the problem of offset tolerance causing pipe mouth and causing product scrap.

[0057] The tail outer side of the clamping jaw body is equipped with annular groove, and the distance between the annular groove and the tail of clamping jaw is 25MM.The width of the annular groove is 3MM, and the depth is 0.5MM.The annular groove is designed at the tail of clamping jaw, and the width is 3MM and the depth is 0.5MM, which effectively distinguishes from the same type of clamping jaw, avoids the possibility of causing material mixing and causing equipment failure.

[0058] The main function of the utility model:

[0059] The present application optimizes the clamping inner hole size to 7.12 mm under the condition that the key outer dimension of the jaw is unchanged, realizes the universalization of the jaw sleeve and connecting rod and other accessories, and reduces the pipe diameter switching time from 5 hours to 2 hours; meanwhile, a wide 7.749 mm and long 5.7 mm clearance slot is designed at the 13 mm position of the head of the jaw body, which reduces the stress of the jaw guide rail and screw on the premise that the clamping force is greater than the down-expanding resistance, prolongs the service life of the key parts. The research and application of the novel jaw device greatly shorten the model switching time, improve the efficiency by 60%, increase the comprehensive utilization rate of the equipment by 30%, realize the universalization of the accessories, and achieve the purpose of rapid model switching.

[0060] In the description of the present application, it should be understood that the terms "upper end surface", "lower end surface", "top", "bottom", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of the description of the present application, and therefore cannot be understood as a limitation on the actual use direction of the present application.

[0061] The above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present application, and they should all be covered in the scope of the claims and the description of the present application.

Claims

1. A gripper device for a tube expander, characterized in that: The clamping jaw body includes a clamping inner hole with a diameter of 7.12 mm, and is applied to a process of switching from a Φ7.94 clamping jaw to a Φ7 clamping jaw, and an outer diameter of the clamping jaw body is the same as that of the Φ7.94 clamping jaw.

2. A collet apparatus for a tube expander as defined in claim 1, wherein: The head inner side of the clamping jaw is provided with a clearance avoiding displacement slot.

3. A collet apparatus for a tube expander as defined in claim 2, wherein: The distance between the clearance avoiding displacement slot and the head of the clamping jaw is 13 mm.

4. A collet apparatus for a tube expander as defined in claim 3, wherein: The diameter of the clearance avoiding displacement slot is 7.749 mm, and the length is 5.7 mm.

5. The collet apparatus of claim 1 wherein: The clamping jaw device further includes an expansion rod located at the center of the clamping inner hole of the clamping jaw body.

6. A collet apparatus for a tube expander as defined in claim 5, wherein: An expansion ball is mounted at the end of the expansion rod.

7. A collet apparatus for a tube expander as defined in claim 6, wherein: The outer diameter of the expansion rod is 6 mm.

8. The collet apparatus of claim 1, wherein: The tail outer side of the clamping jaw is provided with an annular slot.

9. A collet apparatus for a tube expander as defined in claim 8, wherein: The distance between the annular slot and the tail of the clamping jaw is 25 mm.

10. A collet apparatus for a tube expander as defined in claim 9, wherein: The width of the annular slot is 3 mm, and the depth is 0.5 mm.

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