A tempering and drawing process for ultra-thin wall copper tubes

Abstract

The application discloses a kind of tempering drawing processes of super-thin-wall copper pipe, comprising the following steps: a, preparation raw material, ready to stretch the raw material copper pipe needed;B, oil lubrication, the surface of raw material copper pipe needed to stretch ready is lubricated with oil;C, stretching, copper pipe is stretched after lubrication by stretching device;D, lubrication, copper pipe is stretched after lubrication;E, annealing, whether copper pipe needs annealing after stretching lubrication, need annealing directly annealing, no annealing or annealing is completed and needs to be stretched again directly to b step again Process;F, forming, copper pipe reaches diameter is rolled and packaged.The application can more evenly stretch copper pipe, make the uniformity of copper pipe stretching balanced, effectively improve the working efficiency of copper pipe processing, and adopt lubrication before and after stretching and annealing after stretching, can change the hardness and metallographic structure of copper pipe, increase the toughness of copper pipe.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of ultra-thin copper pipe tempering and stretching, and particularly relates to an ultra-thin copper pipe tempering and stretching process. BACKGROUND

[0002] The ultra-thin copper pipe is widely used in daily life, but the processing technology of the ultra-thin copper pipe is relatively complex, and the existing technology has the problem that: the diameter of each reduction and the operation before and after the stretching of the ultra-thin copper pipe are crucially required in the processing process of the ultra-thin copper pipe, and when the proportion of each stretching cannot be grasped, the problems of copper pipe rupture and uneven copper pipe surface occur. SUMMARY

[0003] In view of the problems in the prior art, the application provides an ultra-thin copper pipe tempering and stretching process capable of continuously stretching the copper pipe to make the copper pipe uniform.

[0004] The application is implemented as follows: an ultra-thin copper pipe tempering and stretching process, comprising the following steps:

[0005] a. preparing raw materials, preparing the raw material copper pipe to be stretched;

[0006] b. oil lubrication, lubricating the surface of the prepared raw material copper pipe to be stretched;

[0007] c. stretching, stretching the lubricated copper pipe through a stretching device;

[0008] d. lubrication, lubricating the stretched copper pipe;

[0009] e. annealing, checking whether the stretched and lubricated copper pipe needs to be annealed, directly annealing if needed, or directly processing again in step b if not needed or after annealing;

[0010] f. forming, winding and packaging the copper pipe reaching the diameter;

[0011] The stretching device comprises a stretching box, a stretching die, two positioning rods, two positioning structures, a copper pipe, a lubricating pipe and two lubricating water outlet pipes, the stretching die is located at the right side of the stretching box, the copper pipe is located inside the stretching box and the stretching die, the two lubricating water outlet pipes are respectively located at the front end and the rear end of the copper pipe, the two positioning rods are respectively located at the front side and the rear side of the left side of the stretching die, and the right side of the positioning rod is fixedly connected with the left side of the stretching die, and the two positioning structures are respectively located on the surfaces of the two positioning rods.

[0012] As preferred of the present application, the positioning structure comprises a fixed shell, a screw rod, a bearing and a sliding plate, the fixed shell is sleeved on the surface of the positioning rod, the right side of the fixed shell is fixedly connected with the left side of the stretching box, the screw rod is located at the top inside the stretching box, the inner ring of the bearing is fixedly connected with the bottom surface of the screw rod, the bottom of the bearing is fixedly connected with the top of the sliding plate, the bottom of the sliding plate is fixedly connected with a positioning protrusion, and the surface of the positioning protrusion is matched with the top of the positioning rod.

[0013] As preferred of the present application, the number of the positioning protrusions is four, the top of the positioning rod is provided with positioning grooves matched with the positioning protrusions, and the number of the positioning grooves is several and evenly distributed on the top of the positioning rod.

[0014] As preferred of the present application, the top of the surface of the screw rod is fixedly connected with a rotating handle, the surface of the screw rod is screwed with the inside of the fixed shell, and the surface of the sliding plate is in contact with the inside of the fixed shell and the surface of the stretching box respectively.

[0015] As preferred of the present application, the top and the bottom of the left side of the stretching die are fixedly connected with positioning columns, and the left side of the positioning column penetrates through the stretching box and extends to the inside of the stretching box.

[0016] As preferred of the present application, the left side of the surface of the copper pipe is sleeved with a deoiling rubber ring, and the surface of the deoiling rubber ring is fixedly connected with the inside of the stretching box.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] The present application can stretch the copper pipe more evenly, balance the uniformity of the copper pipe stretching, effectively improve the working efficiency of the copper pipe processing, and change the hardness and metallographic structure of the copper pipe through lubrication before and after stretching and annealing after stretching, thereby increasing the toughness of the copper pipe.

[0019] The present application can conveniently disassemble and replace the stretching die through the positioning structure, thereby better processing and producing different models of copper pipes and more flexible and efficient operation.

[0020] The present application can better connect the stretching die to the surface of the stretching box through the positioning protrusions and the positioning grooves, and the connection is more firm, thereby increasing the stability of the device.

[0021] The present application can conveniently rotate the screw rod through the rotating handle, the screw rod and the sliding plate, thereby conveniently fixing the positioning rod, and conveniently driving the sliding plate to move up and down through the movement of the screw rod in the inside of the fixed shell, thereby conveniently installing and disassembling the positioning rod.

[0022] The positioning column is arranged, the stretching die can be guided, the stability of the stretching die can be improved, the shaking of the stretching die can be reduced, and the precision of copper pipe processing is improved.

[0023] The oil-removing rubber ring is arranged, the surface of the stretched and lubricated copper pipe can be cleaned, the lubricating oil on the surface of the copper pipe can be cleaned, and the recycling of the lubricating oil is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a flowchart provided by an embodiment of the present application;

[0025] Figure 2 is a structural schematic diagram provided by an embodiment of the present application;

[0026] Figure 3 is a perspective view of a stretching die and a positioning rod provided by an embodiment of the present application

[0027] Figure 4 is a sectional view of a positioning structure provided by an embodiment of the present application.

[0028] In the figure: 1, a stretching box; 2, a stretching die; 3, a positioning rod; 4, a positioning structure; 401, a fixed shell; 402, a screw rod; 403, a bearing; 404, a sliding plate; 405, a positioning protrusion; 5, a copper pipe; 6, a lubricating pipe; 7, a lubricating water outlet pipe; 8, a positioning groove; 9, a rotating handle; 10, a positioning column; 11, an oil-removing rubber ring. DETAILED DESCRIPTION

[0029] In order to further understand the inventive content, characteristics and effects of the present application, the following embodiments are exemplified and described in detail as follows with reference to the accompanying drawings.

[0030] The structure of the present application will be described in detail below with reference to the accompanying drawings.

[0031] As shown in the figure, the tempering and stretching process of the ultra-thin wall copper pipe provided by the embodiment of the present application comprises the following steps: Figures 1 to 4

[0032] a, preparing raw materials, preparing the raw material copper pipe 5 needed for stretching;

[0033] b, oil lubrication, oil lubrication is performed on the surface of the prepared raw material copper pipe 5 needed for stretching;

[0034] c, stretching, the stretched copper pipe 5 is stretched by a stretching device;

[0035] d, lubrication, the stretched copper pipe 5 is lubricated;

[0036] ​e, annealing, whether the copper pipe 5 stretched after lubrication needs to be annealed, if so, directly annealing, if not, or if the annealing is completed, directly turning to the b step for reprocessing;

[0037] f, forming, winding and packaging the copper pipe 5 reaching the diameter;

[0038] The stretching device comprises a stretching box 1, a stretching die 2, two positioning rods 3, two positioning structures 4, a copper pipe 5, a lubricating pipe 6 and two lubricating water outlet pipes 7, the stretching die 2 is located at the right side of the stretching box 1, the copper pipe 5 is located inside the stretching box 1 and the stretching die 2, the two lubricating water outlet pipes 7 are respectively located at the front end and the rear end of the copper pipe 5, the two positioning rods 3 are respectively located at the front side and the rear side of the left side of the stretching die 2, and the right side of the positioning rod 3 is fixedly connected with the left side of the stretching die 2, and the two positioning structures 4 are respectively located on the surfaces of the two positioning rods 3.

[0039] With reference to Figure 4 The positioning structure 4 comprises a fixed shell 401, a screw rod 402, a bearing 403 and a sliding plate 404, the fixed shell 401 is sleeved on the surface of the positioning rod 3, the right side of the fixed shell 401 is fixedly connected with the left side of the stretching box 1, the screw rod 402 is located at the top inside the stretching box 1, the inner ring of the bearing 403 is fixedly connected with the bottom surface of the screw rod 402, the bottom of the bearing 403 is fixedly connected with the top of the sliding plate 404, the bottom of the sliding plate 404 is fixedly connected with a positioning protruding block 405, and the surface of the positioning protruding block 405 is matched with the top of the positioning rod 3.

[0040] The above scheme is adopted: by arranging the positioning structure 4, the stretching die 2 can be conveniently disassembled and replaced, so that the copper pipe 5 of different models can be better processed and produced, and the operation is more flexible and fast.

[0041] With reference to Figure 4 The number of the positioning protruding blocks 405 is four, the top of the positioning rod 3 is provided with positioning grooves 8 matched with the positioning protruding blocks 405, and the number of the positioning grooves 8 is several and evenly distributed on the top of the positioning rod 3.

[0042] The above scheme is adopted: by arranging the positioning protruding blocks 405 and the positioning grooves 8, the stretching die 2 can be better connected to the surface of the stretching box 1, and the fixation is more compact, thereby increasing the stability of the device.

[0043] With reference to Figure 4 A rotating handle 9 is fixedly connected to the top surface of the screw rod 402, the surface of the screw rod 402 is threadedly connected with the inside of the fixed shell 401, and the surface of the sliding plate 404 is in contact with the inside of the fixed shell 401 and the surface of the stretching box 1.

[0044] Adopting the above scheme: by setting the rotating handle 9, screw rod 402 and sliding plate 404, the rotation of the screw rod 402 can be facilitated, thereby facilitating the fixing of the positioning rod 3, and by moving the screw rod 402 inside the fixed shell 401, the sliding plate 404 can be conveniently moved up and down, thereby facilitating the installation and disassembly of the positioning rod 3.

[0045] Reference Figure 3 The top and bottom of the left side of the stretching die 2 are fixedly connected with positioning columns 10, and the left side of the positioning column 10 penetrates through the stretching box 1 and extends into the inside of the stretching box 1.

[0046] Adopting the above scheme: by setting the positioning column 10, the stretching die 2 can be guided, and the stability of the stretching die 2 can be increased, and the shaking of the stretching die 2 can be reduced, thereby improving the precision of the copper pipe 5 processing.

[0047] Reference Figure 2 The left side of the surface of the copper pipe 5 is sleeved with an oil removal rubber ring 11, and the surface of the oil removal rubber ring 11 is fixedly connected with the inside of the stretching box 1.

[0048] Adopting the above scheme: by setting the oil removal rubber ring 11, the surface of the stretched and lubricated copper pipe 5 can be cleaned, and the lubricating oil on the surface of the copper pipe 5 can be cleaned, and the recycling of the lubricating oil can be facilitated.

[0049] Working principle of the present application:

[0050] Operation process, prepare the raw copper pipe 5 to be stretched, lubricate the surface of the prepared raw copper pipe 5 to be stretched through the lubricating pipe 6 and the lubricating outlet pipe 7, install the appropriate stretching die 2 on the surface of the stretching box 1, clamp the positioning rod 3 on the left side of the stretching die 2 in the inside of the stretching box 1, and at the same time, the positioning column 10 is clamped into the inside of the stretching box 1, the stretching die 2 is positioned, and the positioning rod 3 is clamped in the inside of the fixed shell 401, the rotating handle 9 is rotated, the rotating handle 9 drives the screw rod 402 to rotate, the screw rod 402 moves downward through cooperation with the fixed shell 401, the bearing 403 moves downward, the sliding plate 404 moves downward, the positioning protrusion 405 is clamped in the positioning groove 8 on the top of the positioning rod 3, and at the same time, the positioning protrusion 405 extrudes the positioning rod 3, so that the stretching die 2 is better clamped on the surface of the stretching box 1, and the replacement of the stretching die 2 is completed, when the stretching die 2 needs to be replaced, reverse operation can be performed, when the copper pipe 5 passes through the stretching die 2 and then passes through the lubricating pipe 6 and the lubricating outlet pipe 7 to lubricate the copper pipe 5, the copper pipe 5 passes through the oil removal rubber ring 11, the excess lubricating oil on the surface of the copper pipe 5 is cleaned, and then subsequent annealing or re-stretching treatment is performed according to requirements.

[0051] Application example 1

[0052] The copper pipe with a diameter of 6.8*0.15 is processed into a copper pipe with a diameter of 2*0.08;

[0053] First step: the copper pipe with a diameter of 6.8*0.15 is stretched into a copper pipe with a diameter of 6.1*0.11, and then annealing is performed at a temperature of 360 degrees for 1 hour to change the hardness and metallographic structure of the copper pipe and increase the toughness of the copper pipe;

[0054] Second step: the copper pipe with a diameter of 6.1*0.11 is stretched into a copper pipe with a diameter of 5.6*0.11;

[0055] Third step: the copper pipe with a diameter of 5.6*0.11 is stretched into a copper pipe with a diameter of 5*0.1;

[0056] Fourth step: the copper pipe with a diameter of 5*0.1 is stretched into a copper pipe with a diameter of 4*0.09, and then annealing is performed at a temperature of 360 degrees for 1 hour to change the hardness and metallographic structure of the copper pipe and increase the toughness of the copper pipe;

[0057] Fifth step: the copper pipe with a diameter of 4*0.09 is stretched into a copper pipe with a diameter of 3.3*0.075;

[0058] Sixth step: the copper pipe with a diameter of 3.3*0.075 is stretched into a copper pipe with a diameter of 2.6*0.08;

[0059] Seventh step: the copper pipe with a diameter of 2.6*0.08 is stretched into a copper pipe with a diameter of 2*0.08, and the ultra-thin stretching of the copper pipe is completed.

[0060] Application example 2

[0061] The copper pipe with a diameter of 7.2*0.16 is processed into a copper pipe with a diameter of 6*0.10;

[0062] First step: the copper pipe with a diameter of 7.2*0.16 is stretched into a copper pipe with a diameter of 6.5*0.11, and then annealing is performed at a temperature of 360 degrees for 1 hour to change the hardness and metallographic structure of the copper pipe and increase the toughness of the copper pipe;

[0063] Second step: the copper pipe with a diameter of 6.5*0.11 is stretched into a copper pipe with a diameter of 6.1*0.095;

[0064] Third step: the copper pipe with a diameter of 6.1*0.095 is stretched into a copper pipe with a diameter of 6*0.10, and the ultra-thin stretching of the copper pipe is completed.

[0065] Application example 3

[0066] The copper pipe with a diameter of 7.2*0.16 is processed into a copper pipe with a diameter of 5*0.09;

[0067] First step: stretch the copper pipe with diameter 7.2*0.16 into copper pipe with diameter 6.5*0.11, then anneal at 360 degrees for 1 hour to change the hardness and metallographic structure of the copper pipe and increase the toughness of the copper pipe;

[0068] Second step: stretch the copper pipe with diameter 6.5*0.11 into copper pipe with diameter 6.1*0.095;

[0069] Third step: stretch the copper pipe with diameter 6.1*0.095 into copper pipe with diameter 5*0.09 to complete the ultra-thin stretching of the copper pipe.

[0070] Application example 4

[0071] Process the copper pipe with diameter 7.2*0.16 into copper pipe with diameter 4*0.10;

[0072] First step: stretch the copper pipe with diameter 7.2*0.16 into copper pipe with diameter 6.5*0.11, then anneal at 360 degrees for 1 hour to change the hardness and metallographic structure of the copper pipe and increase the toughness of the copper pipe;

[0073] Second step: stretch the copper pipe with diameter 6.5*0.11 into copper pipe with diameter 6.1*0.095;

[0074] Third step: stretch the copper pipe with diameter 6.1*0.095 into copper pipe with diameter 5*0.09;

[0075] Fourth step: stretch the copper pipe with diameter 5*0.09 into copper pipe with diameter 4*0.10 to complete the ultra-thin stretching of the copper pipe.

[0076] Application example 5

[0077] Process the copper pipe with diameter 7.2*0.16 into copper pipe with diameter 3*0.10;

[0078] First step: stretch the copper pipe with diameter 7.2*0.16 into copper pipe with diameter 6.5*0.11, then anneal at 360 degrees for 1 hour to change the hardness and metallographic structure of the copper pipe and increase the toughness of the copper pipe;

[0079] Second step: stretch the copper pipe with diameter 6.5*0.11 into copper pipe with diameter 6.1*0.095;

[0080] Third step: stretch the copper pipe with diameter 6.1*0.095 into copper pipe with diameter 5*0.09;

[0081] Fourth step: stretch the copper pipe with diameter 5*0.09 into copper pipe with diameter 4*0.10;

[0082] Fifth step: stretch the copper pipe with diameter 4*0.10 into copper pipe with diameter 3*0.10, complete the ultra-thin stretching of the copper pipe.

[0083] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other present or future technologies can provide. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other present or future technologies can provide. Wherever possible, devices and methods are described in only their best current form so as not to obscure the present application. The terminology used by those of ordinary skill in the relevant art is intended to be interpreted by those of ordinary skill in the art in accordance with the principles of etymology and the contextual language common to those of ordinary skill in the art. It is further understood that the use of certain technology, words, phrases, scripting, formatting, or symbols are intended only to illustrate and not to restrict the scope of the possible embodiments of the present application, which is defined only in the appended claims. Moreover, it is not intended for any term or auto-correction in the specification or claims to be treated as a disclaimer or disavowal of certain embodiments of the present application even if the term or auto-correction can have been originally and previously intended to serve in such manner.

[0084] While the embodiments of the application have been shown and described herein, it is to be understood that the application is not limited to these embodiments. Rather, many modifications, changes, substitutions, and alterations can be made thereto without departing from the spirit and scope of the present application as defined by the appended claims and their equivalents.

Claims

1. A temper drawing process for ultra-thin wall copper tube, characterized by: It comprises the following steps: a, preparing raw materials, preparing the raw material copper pipe (5) that needs to be stretched; b, oil lubrication, the surface of the prepared raw material copper pipe (5) that needs to be stretched is lubricated with oil; c, stretching, the lubricated copper pipe (5) is stretched by stretching device; d, lubrication, the stretched copper pipe (5) is lubricated; e, annealing, whether the stretched and lubricated copper pipe (5) needs to be annealed, if it needs to be annealed, it is directly annealed, if it does not need to be annealed or the annealing is completed, it is directly transferred to b step for reprocessing; f, forming, the copper pipe (5) reaching the diameter is wound and packaged; The stretching device comprises a stretching box (1), a stretching die (2), two positioning rods (3), two positioning structures (4), a copper pipe (5), a lubricating pipe (6) and two lubricating water outlet pipes (7), the stretching die (2) is located on the right side of the stretching box (1), the copper pipe (5) is located in the interior of the stretching box (1) and the stretching die (2), the two lubricating water outlet pipes (7) are respectively located at the front end and the rear end of the copper pipe (5), the two positioning rods (3) are respectively located on the front side and the rear side of the left side of the stretching die (2), and the right side of the positioning rod (3) is fixedly connected with the left side of the stretching die (2), the two positioning structures (4) are respectively located on the surfaces of the two positioning rods (3); The positioning structure (4) comprises a fixed shell (401), a screw rod (402), a bearing (403) and a sliding plate (404), the fixed shell (401) is sleeved on the surface of the positioning rod (3), the right side of the fixed shell (401) is fixedly connected with the left side of the stretching box (1), the screw rod (402) is located at the top in the interior of the stretching box (1), the inner ring of the bearing (403) is fixedly connected with the bottom surface of the screw rod (402), the bottom of the bearing (403) is fixedly connected with the top of the sliding plate (404), the bottom of the sliding plate (404) is fixedly connected with a positioning lug (405), and the surface of the positioning lug (405) is matched with the top of the positioning rod (3) in use; The top and the bottom of the left side of the stretching die (2) are fixedly connected with a positioning column (10), and the left side of the positioning column (10) penetrates through the stretching box (1) and extends into the interior of the stretching box (1); The left side of the surface of the copper pipe (5) is sleeved with a deoiling rubber ring (11), and the surface of the deoiling rubber ring (11) is fixedly connected with the interior of the stretching box (1).

2. A temper drawing process for an ultra-thin walled copper tube as claimed in claim 1, wherein: The number of the positioning lugs (405) is four, the top of the positioning rod (3) is provided with a positioning groove (8) matched with the positioning lugs (405) in use, the number of the positioning grooves (8) is several, and they are evenly distributed on the top of the positioning rod (3).

3. A temper drawing process for an ultra-thin wall copper tube as claimed in claim 1, wherein: The top of the surface of the screw rod (402) is fixedly connected with a rotating handle (9), the surface of the screw rod (402) is threadedly connected with the interior of the fixed shell (401), and the surface of the sliding plate (404) is respectively in contact with the interior of the fixed shell (401) and the surface of the stretching box (1).

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