A continuous feeding and centering device for planetary rolling of copper cast billets

Abstract

The application provides a continuous feeding and aerating centering device for planetary rolling of copper cast pipe blanks, which comprises a core rod for positioning the central axis of the copper cast pipe blank on a machining center line, a tail aerating mechanism for aerating the tail of the core rod, a tail clamping mechanism for clamping the tail of the core rod and rotating with the core rod, a pushing device for pushing the copper cast pipe blank forward, a pushing trolley for pushing the copper cast pipe blank forward, a middle clamping mechanism for clamping the middle of the core rod and rotating with the core rod, and a middle aerating mechanism for aerating the middle of the core rod. The device can realize continuous feeding of the copper cast pipe blank, and aerate the copper pipe inner diameter area of the rolling deformation area of the copper cast pipe blank in real time on line during the machining process of the copper cast pipe blank, so as to fully ensure that the inner wall of the rolling area of the copper cast pipe blank is not oxidized, reduce the maintenance and repair cost, and be beneficial to improving the production efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of copper casting tube blank feeding equipment, and more specifically, to a continuous feeding, air-filling, and centering equipment for planetary rolling of copper casting tube blanks. Background Technology

[0002] Existing planetary rolling mills generally include a feeding mechanism for conveying copper cast tube billets and a planetary rolling mill main unit for rolling the copper cast tube billets. The feeding mechanism typically includes a copper cast tube billet feeding mechanism and a mandrel. The copper cast tube billet passes through the mandrel, keeping it positioned on the machining center line, and is simultaneously pushed forward by the feeding mechanism until it enters the planetary rolling mill main unit. Existing feeding mechanisms have the following shortcomings:

[0003] During the rolling process, the copper cast tube billet undergoes severe metal deformation under the action of the planetary rolling mill rolls, and the metal grains recrystallize and heat up. Copper is prone to oxidation at high temperatures. Therefore, inert gas protection is required both inside and outside the copper cast tube billet during the rolling process. Thus, the mandrel is generally filled with inert gases such as nitrogen to ensure the normal rolling process. However, the method of filling the mandrel with nitrogen is generally as follows: during the casting and rolling process, the mandrel rotates with the copper cast tube billet; two cylinders are used, the upper cylinder pushes the upper nylon block downwards, and the lower cylinder pushes the lower nylon block upwards, so that the upper and lower nylon blocks clamp the rotating mandrel. The clamping position of the upper and lower nylon blocks is at the middle of the mandrel where the gas is filled; then nitrogen is introduced. However, friction between the nylon block and the rotating mandrel causes wear on the nylon block, requiring frequent replacement, maintenance, and repair by operators. Otherwise, if the nylon block is not replaced in time, it will not seal tightly, leading to nitrogen leakage. This can result in insufficient nitrogen inside the mandrel or insufficient nitrogen inside the copper casting billet in the rolling zone, causing oxidation of the inner wall and affecting the quality of the rolled product. In such cases, the machine must be shut down for inspection and repair, and replacement of parts, wasting a significant amount of production time and hindering production efficiency. Summary of the Invention

[0004] To overcome the shortcomings and deficiencies of the existing technology, the purpose of this invention is to provide a continuous feeding, gas-filling, and centering device for planetary rolling of copper cast tube blanks. This device can realize continuous feeding and rolling of copper cast tube blanks. During the processing of copper cast tube blanks, gas is injected online in real time into the mandrel and fed into the inner diameter area of ​​the copper tube in the rolling deformation zone, which fully ensures that the inner wall of the copper cast tube blank in the rolling zone will not oxidize. It can avoid wear caused by friction with the mandrel, reduce maintenance and repair costs, and help improve production efficiency.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a continuous feeding, gas-filling, and centering device for planetary rolling of copper cast tube billets, comprising:

[0006] A mandrel rod used to position the copper casting tube blank on the machining center line so as to position the central axis of the copper casting tube blank;

[0007] A tail inflation mechanism for filling the end of the mandrel with gas.

[0008] A tail clamping mechanism used to hold the tail of the mandrel and rotate with it;

[0009] A top-feeding device used to push copper casting tube blanks forward;

[0010] A pusher trolley used to move copper casting tube blanks forward;

[0011] A central clamping mechanism used to hold the middle part of the mandrel rod and rotate with it;

[0012] And a central inflation mechanism for inflating gas into the central inflation section of the mandrel.

[0013] The top feeding device, the tail inflation mechanism, the tail holding mechanism, the push trolley, the middle holding mechanism, and the middle inflation mechanism are arranged sequentially along the moving direction of the copper casting tube blank.

[0014] The central clamping mechanism is connected to a hollow shaft; the hollow shaft has a shaft cavity for inserting the mandrel rod; the hollow shaft extends to the central inflation mechanism; the central inflation mechanism includes two or more inflation units; each inflation unit includes an inflation support frame, an inflation clamping drive module, and a clamping module; the inflation support frames of each inflation unit are respectively set on the hollow shaft; each clamping module is located on the periphery of the mandrel rod, and the clamping module is connected to the inflation support frame through the inflation clamping drive module to realize that all clamping modules together clamp or release the mandrel rod;

[0015] Each clamping module completely encloses the mandrel circumferentially; each clamping module has an inflation chamber; the inflation chambers of each clamping module are positioned opposite each other to achieve communication; each clamping module has a gas channel that communicates with the inflation chamber; the inflation chamber corresponds to the inflation point in the middle of the mandrel.

[0016] The working principle of the equipment of this invention is as follows: copper casting billets are fed one after another from the tail end of the planetary rolling mill along the processing center line into the front rolling mill for processing; the top feeding device pushes the tail end of the copper casting billet, causing the copper casting billet to move forward and pass through the mandrel rod until the tail end of the copper casting billet reaches the front side of the push trolley's push rod; then the push trolley's push rod continues to push the copper casting billet forward; the copper casting billet's movement stroke is divided into two segments, handled by the top feeding device and the push trolley respectively, which can realize continuous feeding of copper casting billets one after another. When the copper casting billet needs to pass through the mandrel rod area corresponding to the tail holding mechanism / middle holding mechanism, the tail holding mechanism / middle holding mechanism alternately opens to allow the copper casting billet to pass through; at other times, the tail holding mechanism / middle holding mechanism alternately holds and positions the mandrel rod to ensure that the position of the mandrel rod does not change during the rolling process, and protective gas is continuously injected into the mandrel to achieve stable rolling.

[0017] Since the copper casting tube blank drives the mandrel rod to rotate continuously during the processing, this invention employs a central clamping mechanism to clamp the mandrel rod and drive the hollow shaft to rotate with the mandrel rod. The central inflation mechanism's inflation clamping drive module clamps each clamping module onto the mandrel rod, thereby sealing the inflation chamber corresponding to the central inflation point of the mandrel rod. Because the central inflation mechanism is fixed to the hollow shaft, the central inflation mechanism and the mandrel rod are relatively fixed and do not rotate relative to each other. When gas is injected into the gas channel, the gas enters the inflation chamber through the gas channel. The high pressure inside the inflation chamber causes the gas to enter the mandrel rod, thus achieving inflation.

[0018] The equipment of this invention can realize online gas filling into the mandrel during the processing of copper casting tube blanks, which fully ensures that the inner wall of the rolling zone will not oxidize; the central gas filling mechanism can rotate synchronously with the mandrel, and the clamping module and the mandrel are relatively stationary, avoiding wear of the clamping module due to friction with the mandrel, extending service life, and reducing maintenance and repair costs; the clamping module can form a good, stable and reliable closed gas filling space at the central gas filling point of the mandrel, ensuring effective gas filling into the mandrel.

[0019] Preferably, the tail inflation mechanism includes a tail inflation platform, a tail inflation module, and a guide support module; the tail inflation module and the guide support module are respectively mounted on the inflation platform via a tail lifting module.

[0020] The tail inflation module and the guide support module can switch positions respectively under the action of the tail lifting module; when the top feeding device pushes the copper casting tube blank, the guide support module is in the working position and guides the copper casting tube blank to move; after the copper casting tube blank leaves the tail inflation platform, the tail inflation module is switched to the working position and gas is injected into the inflation point of the mandrel rod.

[0021] To achieve continuous feeding and rolling, after the tail of the previous copper billet passes through the middle clamping mechanism, the tail clamping mechanism opens, the tail nitrogen filling is activated, the middle clamping mechanism clamps and positions the mandrel, and the middle mandrel filling mechanism is activated. At this time, the next copper billet passes through the tail of the mandrel, passes through the middle through hole of the tail clamping mechanism, and is conveyed forward to hold the tail of the previous copper billet, thus achieving continuous rolling.

[0022] Preferably, in the central inflation mechanism, each clamping module has an elongated groove on the side facing the mandrel; the elongated groove extends along the length of the mandrel; when clamping the mandrel, the walls of the elongated grooves of each clamping module completely enclose the mandrel circumferentially; the inflation chamber is opened on the wall of the elongated groove to form a sealed inflation space at the central inflation point of the mandrel.

[0023] Preferably, the elongated groove refers to an elongated groove with a semi-circular cross-section; the radius of the semi-circle matches the radius of the mandrel. When clamping the mandrel, the walls of the elongated grooves of each clamping module can completely enclose the mandrel circumferentially.

[0024] Preferably, the mandrel includes a front section and a rear section; the inflation port at the tail end of the mandrel is located at the rear section; the inflation port in the middle section of the mandrel is located at the front section; an inflation hole is formed on the side of the front section of the mandrel to serve as the middle inflation port; the inflation hole communicates with the mandrel's cavity; a movable sphere is provided in the inflation hole, and the sphere is abutted against the inflation hole by an elastic element. The air pressure in the inflation chamber pushes the sphere open, allowing gas to enter the mandrel for inflation; after inflation is complete, the gas injection is stopped, and the sphere returns to its original position under the action of the elastic element, closing the inflation hole.

[0025] Preferably, the elastic element is disposed on the side wall of the mandrel cavity opposite to the mandrel inflation hole; the elastic element abuts against the ball so that the ball is placed against the mandrel inflation hole; this can effectively realize the opening and closing of the mandrel inflation hole of the mandrel rod.

[0026] Preferably, the mandrel inflation port includes a first port segment, a transition port segment, and a second port segment arranged sequentially from the side closest to the inflation chamber to the side furthest from the inflation chamber; the first port segment has a small diameter, and the second port segment has a large diameter.

[0027] The diameter of the sphere is larger than the diameter of the first hole section and smaller than the diameter of the second hole section; the diameter of the transition hole section gradually increases as it extends from the side closer to the first hole section to the side closer to the second hole section, thus forming the abutment surface of the sphere. The sphere can effectively seal the air inlet of the mandrel.

[0028] Preferably, the central clamping mechanism refers to a chuck mechanism with jaws; the hollow shaft passes through the chuck mechanism; the hollow shaft has jaw holes at the corresponding positions of the jaws; the jaws extend from the jaws into the hollow shaft cavity to clamp the mandrel rod; the shape and size of the jaw holes match the cross-section of the jaws to achieve mutual positioning between the hollow shaft and the jaws.

[0029] Preferably, it also includes a shaft bearing mechanism for supporting and positioning the hollow shaft; the shaft bearing mechanisms are located on both sides of the central inflation mechanism.

[0030] Preferably, the shaft bearing mechanism includes a shaft bearing mechanism one and a shaft bearing mechanism two; the shaft bearing mechanism one has an inflation channel one; the hollow shaft has an inflation channel two that communicates with the inflation channel one; when the middle inflation mechanism clamping module clamps the mandrel, the gas channel of the middle inflation mechanism clamping module is connected to the inflation channel two.

[0031] The pneumatic clamping drive module is a cylinder; the shaft bearing mechanism also includes a second shaft bearing mechanism; the second shaft bearing mechanism has a third inflation channel; the hollow shaft has a fourth inflation channel that communicates with the third inflation channel; the fourth inflation channel is connected to the cylinder.

[0032] The external air supply device supplies gas to the gas channel of the clamping module of the central air supply mechanism through the air supply channel one of the shaft bearing mechanism and the air supply channel two of the hollow shaft. Gas is supplied to the cylinder through the air supply channel three of the shaft bearing mechanism and the air supply channel four of the hollow shaft to drive the cylinder to work.

[0033] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0034] 1. The equipment of this invention can continuously feed copper casting tube blanks one after another. The tail clamping mechanism and the middle clamping mechanism open alternately to allow the copper casting tube blank to pass through. At other times, the tail clamping mechanism and the middle clamping mechanism alternately clamp and position the mandrel rod to ensure that the position of the mandrel rod head does not change during the rolling process. Inert gas is continuously injected into the mandrel through the tail gas filling mechanism and the middle gas filling mechanism to achieve stable rolling.

[0035] 2. The equipment of this invention can continuously and online inject gas into the mandrel during the processing of copper casting tube blanks, ensuring that the inside of the copper tube in the rolling zone is in a sufficiently inert gas environment during the rolling process; this can avoid oxidation of the inner wall of the copper tube during the rolling process and improve the quality of the rolled product; the central gas injection mechanism can rotate with the mandrel, and the clamping module and the mandrel are relatively stationary, reducing maintenance and repair costs due to wear of parts at the sealing point; the clamping module can form a good, stable and reliable closed gas injection space at the central gas injection point of the mandrel, ensuring effective gas injection into the mandrel during continuous feeding;

[0036] 3. The device of the present invention has a tail inflation mechanism that can switch between inflation and guiding functions, which can improve working stability;

[0037] 4. In the device of the present invention, the mandrel rod can effectively open and close the mandrel inflation hole, ensuring that gas does not leak out from the mandrel rod. Attached Figure Description

[0038] Figure 1 This is a structural block diagram of the continuous feeding, air-filling, and centering device of the present invention;

[0039] Figure 2 This is a schematic diagram of the installation of the central inflation mechanism, central clamping mechanism, shaft bearing mechanism and hollow shaft of the continuous feeding, inflation and centering device of the present invention.

[0040] Figure 3 This is a cross-sectional schematic diagram of the continuous feeding, inflation, and centering device of the present invention, including the central inflation mechanism, the central clamping mechanism, the shaft bearing mechanism, and the hollow shaft.

[0041] Figure 4 This is a schematic diagram of the middle inflation mechanism of the continuous feeding, inflation and centering device of the present invention;

[0042] Figure 5 This is a schematic diagram of the hollow shaft structure of the continuous feeding, air-filling, and centering device of the present invention;

[0043] Figure 6 This is a schematic diagram of the mandrel structure of the continuous feeding, air-filling, and centering device of the present invention;

[0044] Figure 7 This is a cross-sectional schematic diagram of the mandrel rod in the continuous feeding, inflation, and centering device of this invention.

[0045] Among them, 1 is the mandrel rod, 11 is the rod cavity, 12 is the mandrel inflation hole, 13 is the sphere, 14 is the elastic element, 2 is the middle inflation mechanism, 21 is the inflation clamping drive module, 22 is the clamping seat, 23 is the clamping block, 24 is the long slot, 25 is the inflation cavity, 26 is the gas channel, 3 is the hollow shaft, 31 is the claw hole, 32 is the clamping block hole, 33 is the second inflation channel, 34 is the fourth inflation channel, 4 is the middle clamping mechanism, 5 is the shaft bearing mechanism, 51 is the first inflation channel, 52 is the third inflation channel, 6 is the rolling mill, 7 is the push trolley, 8 is the tail clamping mechanism, 9 is the tail inflation mechanism, and 10 is the top conveying device. Detailed Implementation

[0046] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0047] Example

[0048] like Figures 1 to 7As shown in this embodiment, a continuous feeding, gas-filling, and centering device for planetary rolling of copper cast tube billets includes:

[0049] Mandrel 1 is used to position the copper casting tube blank on the machining center line so as to position the central axis of the copper casting tube blank;

[0050] Tail inflation mechanism 9 for inflating gas into the tail end of the mandrel rod 1.

[0051] Tail clamping mechanism 8 for clamping the tail of mandrel rod 1 and rotating with mandrel rod 1;

[0052] A top-feeding device 10 is used to push copper casting tube blanks forward.

[0053] A pusher trolley 7 is used to move the copper casting tube blank forward;

[0054] A middle clamping mechanism 4 is used to clamp the middle part of the mandrel rod 1 and rotate with the mandrel rod 1;

[0055] Shaft bearing mechanism 5 for supporting and positioning hollow shaft 3;

[0056] And a central inflation mechanism 2 for inflating gas into the central inflation port of the mandrel rod 1.

[0057] The top feeding device 10, the tail inflation mechanism 9, the tail holding mechanism 8, the pushing trolley 7, the middle holding mechanism 4, and the middle inflation mechanism 2 are arranged sequentially along the moving direction of the copper casting tube blank.

[0058] The working principle of the equipment of this invention is as follows: copper casting tube blanks are fed one after another from the tail end into the front rolling mill 6 along the processing center line for processing; the top feeding device 10 pushes the tail end of the copper casting tube blank, causing the copper casting tube blank to move forward and pass through the mandrel rod 1, until the tail end of the copper casting tube blank reaches the front side of the push rod of the push trolley 7; then the push rod of the push trolley 7 continues to push the copper casting tube blank forward; the copper casting tube blank movement stroke is divided into two segments, which are respectively handled by the top feeding device 10 and the push trolley 7, which can realize the continuous feeding of copper casting tube blanks one after another. When the copper casting tube blank is about to pass through the area of ​​the mandrel rod 1 corresponding to the tail clamping mechanism 8 / middle clamping mechanism 4, the tail clamping mechanism 8 / middle clamping mechanism 4 alternately open to allow the copper casting tube blank to pass through; the alternating clamping ensures that the position of the mandrel rod does not change during the rolling process while different copper casting tube blanks are continuously supplied to the rolling mill, and the front and rear gas charging devices work alternately to ensure that inert gas is continuously injected into the mandrel to achieve stable rolling.

[0059] The tail inflation mechanism 9 includes a tail inflation platform, a tail inflation module, and a guide support module; the tail inflation module and the guide support module are respectively mounted on the inflation platform via the tail lifting module.

[0060] The tail-end inflation module and the guide support module can be switched in position by the tail-end lifting module. When the top-feeding device 10 pushes the copper casting billet, the guide support module is in the working position, guiding the copper casting billet to move. After the copper casting billet leaves the tail-end inflation platform, the tail-end inflation module is switched to the working position to inflate the mandrel 1 at the tail-end inflation point. The structure of the tail-end inflation module and the mandrel 1 at the tail-end inflation point can adopt existing technology; the guide support module can adopt existing technology, such as guide rollers.

[0061] The central clamping mechanism 4 is connected to a hollow shaft 3; the hollow shaft 3 has a shaft cavity for passing through the mandrel rod 1; the hollow shaft 3 extends to the central inflation mechanism 2; the central inflation mechanism 2 includes two or more inflation units; in this embodiment there are two inflation units, but in actual applications there can be three, four, or even more inflation units. Each inflation unit includes an inflation support frame, an inflation clamping drive module 21, and a clamping module; the inflation support frames of each inflation unit are respectively set on the hollow shaft 3; each clamping module is located on the periphery of the mandrel rod 1, and the clamping module is connected to the inflation support frame through the inflation clamping drive module 21 to realize that all clamping modules together clamp or release the mandrel rod 1.

[0062] Each clamping module includes a clamping seat 22 and a clamping block 23; the clamping block 23 is preferably made of a flexible non-metallic material to ensure sealing. The clamping seat 22 is connected to the pneumatic clamping drive module 21; the clamping block 23 is located on the side of the clamping seat 22 near the mandrel 1.

[0063] Each clamping block 23 has a long groove 24 on the side facing the mandrel 1 along the length of the mandrel 1; when clamping the mandrel 1, the walls of the long grooves 24 of each clamping block 23 completely enclose the mandrel 1 in the circumference.

[0064] Each clamping block 23 has an inflation chamber 25 on its long groove 24 wall; the inflation chambers 25 of each clamping module are positioned opposite each other to achieve communication; the clamping module has a gas channel 26, which is connected to the inflation chamber 25.

[0065] Preferably, the elongated groove 24 refers to an elongated groove 24 with a semi-circular cross-section; the radius of the semi-circle matches the radius of the mandrel 1. When clamping the mandrel 1, the walls of the elongated grooves 24 of each clamping module can completely enclose the mandrel 1 circumferentially. The inflation point in the middle of the mandrel 1 corresponds to the position of the inflation chamber 25.

[0066] The mandrel 1 includes a front section and a rear section; the inflation point at the tail of the mandrel 1 is located at the rear section; and the inflation point in the middle of the mandrel 1 is located at the front section.

[0067] A mandrel inflation hole 12 is provided on the front side of the mandrel rod 1 to serve as the central inflation point; the mandrel inflation hole 12 is connected to the rod cavity 11 of the mandrel rod 1; a movable ball 13 is provided in the mandrel inflation hole 12, and the ball 13 is abutted against the mandrel inflation hole 12 by an elastic element 14. The air pressure in the inflation chamber 25 pushes the ball 13 open, causing the mandrel inflation hole 12 to open, and gas enters the mandrel rod 1 to achieve inflation; after inflation is completed, the gas injection is stopped, and the ball 13 returns to its original position under the action of the elastic element 14 to close the mandrel inflation hole 12.

[0068] The elastic element 14 is disposed on the side wall of the rod cavity 11 of the mandrel rod 1, opposite to the mandrel inflation hole 12; the elastic element 14 abuts against the ball 13 so that the ball 13 is abutted against the mandrel inflation hole 12; the mandrel inflation hole 12 of the mandrel rod 1 can be opened and closed effectively.

[0069] The mandrel inflation port 12 includes three segments arranged sequentially from the side closest to the inflation chamber 25 to the side furthest from the inflation chamber 25: segment one, transition segment, and segment two. Segment one has a smaller diameter, while segment two has a larger diameter. Preferably, the diameter of the sphere 13 is larger than the diameter of segment one and smaller than the diameter of segment two. The diameter of the transition segment gradually increases as it extends from the side closest to segment one to the side closest to segment two, forming a support surface for the sphere 13. The sphere 13 effectively seals the mandrel inflation port 12.

[0070] Both the tail clamping mechanism 8 and the middle clamping mechanism 4 can adopt existing technologies, such as a chuck mechanism with jaws. In the middle clamping mechanism 4, the hollow shaft 3 passes through the chuck mechanism; the hollow shaft 3 has a jaw hole 31 at the corresponding position of the jaw; the jaw extends from the jaw into the shaft cavity of the hollow shaft 3 to clamp the mandrel rod 1; the shape and size of the jaw hole 31 match the cross-section of the jaw to achieve mutual positioning between the hollow shaft 3 and the jaw.

[0071] The shaft bearing mechanism 5 includes a shaft bearing mechanism one and a shaft bearing mechanism two. The shaft bearing mechanism one has an inflation channel 51. The hollow shaft 3 has an inflation channel 33 that communicates with the inflation channel 51. When the clamping module of the middle inflation mechanism 2 clamps the mandrel 1, the gas channel 26 of the clamping module of the middle inflation mechanism 2 communicates with the inflation channel 33. An external gas supply device supplies gas to the gas channel 26 of the clamping module of the middle inflation mechanism 2 through the inflation channel 51 of the shaft bearing mechanism one and the inflation channel 33 of the hollow shaft 3.

[0072] The pneumatic clamping drive module 21 is a cylinder; the shaft bearing mechanism 2 has a pneumatic channel 3 52; the hollow shaft 3 has a pneumatic channel 4 34 that communicates with the pneumatic channel 3 52; the pneumatic channel 4 34 is connected to the cylinder. Gas is supplied to the cylinder through the pneumatic channel 3 52 of the shaft bearing mechanism 2 and the pneumatic channel 4 34 of the hollow shaft 3 to drive the cylinder to work.

[0073] Since the copper casting tube blank drives the mandrel 1 to rotate continuously during the processing, in this invention, the central clamping mechanism 4 clamps the mandrel 1 and drives the hollow shaft 3 to rotate with the mandrel 1; the inflation clamping drive module of the central inflation mechanism 2 clamps the mandrel 1 with each clamping module so that the inflation chamber corresponding to the central inflation point of the mandrel 1 is closed; since the central inflation mechanism 2 is fixed to the hollow shaft 3, the central inflation mechanism 2 and the mandrel 1 are relatively stationary and do not rotate relative to each other; when gas is injected into the gas channel, the gas enters the inflation chamber through the gas channel; the high pressure in the inflation chamber causes the gas to enter the mandrel 1 to achieve inflation.

[0074] This invention enables continuous online gas filling of the mandrel 1 during the continuous feeding process of copper casting billet processing, ensuring that the inner wall of the rolling zone does not oxidize. The central gas filling mechanism 2 rotates with the mandrel 1, while the clamping module remains relatively stationary with respect to the mandrel 1, preventing wear on the clamping module due to friction with the mandrel 1, extending its service life, and reducing maintenance and repair costs. The clamping module can form a good, stable, and reliable closed gas filling space at the central gas filling point of the mandrel 1, ensuring effective gas filling into the mandrel 1. The filling gas can be nitrogen or other gases that can delay the oxidation of the mandrel.

[0075] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A continuous feeding and aerodynamic centering device for the planetary rolling of copper cast billets, characterized in that: include: A mandrel rod used to position the copper casting tube blank on the machining center line so as to position the central axis of the copper casting tube blank; A tail inflation mechanism for filling the end of the mandrel with gas. A tail clamping mechanism used to hold the tail of the mandrel and rotate with it; A top-feeding device used to push copper casting tube blanks forward; A pusher trolley used to move copper casting tube blanks forward; A central clamping mechanism used to hold the middle part of the mandrel rod and rotate with it; And a central inflation mechanism for inflating gas into the central inflation section of the mandrel. The top feeding device, the tail inflation mechanism, the tail holding mechanism, the push trolley, the middle holding mechanism, and the middle inflation mechanism are arranged sequentially along the moving direction of the copper casting tube blank. The central clamping mechanism is connected to a hollow shaft; the hollow shaft has a shaft cavity for inserting the mandrel rod; the hollow shaft extends to the central inflation mechanism; the central inflation mechanism includes two or more inflation units; each inflation unit includes an inflation support frame, an inflation clamping drive module, and a clamping module; the inflation support frames of each inflation unit are respectively set on the hollow shaft; each clamping module is located on the periphery of the mandrel rod, and the clamping module is connected to the inflation support frame through the inflation clamping drive module to realize that all clamping modules together clamp or release the mandrel rod; Each clamping module completely encloses the mandrel circumferentially; each clamping module has an inflation chamber; the inflation chambers of each clamping module are positioned opposite each other to achieve communication; each clamping module has a gas channel that communicates with the inflation chamber; the inflation chamber corresponds to the inflation point in the middle of the mandrel.

2. A continuous feeding and gas centering device for planetary rolling of copper cast billets, according to claim 1, characterized in that: The tail inflation mechanism includes a tail inflation platform, a tail inflation module, and a guide support module for guiding the movement of the copper casting tube blank; the tail inflation module and the guide support module are respectively mounted on the tail inflation platform via a tail lifting module.

3. The continuous feeding, air-filling, and centering equipment for planetary rolling of copper cast tube billets according to claim 1, characterized in that: In the central inflation mechanism, each clamping module has a long groove on the side facing the mandrel; the long groove extends along the length of the mandrel; when clamping the mandrel, the long groove wall of each clamping module completely surrounds the mandrel circumferentially; the inflation chamber is opened in the long groove wall to form a sealed inflation space at the central inflation point of the mandrel.

4. The continuous feeding, air-filling, and centering equipment for planetary rolling of copper cast tube billets according to claim 3, characterized in that: The long groove refers to a long groove with a semi-circular cross-section; the radius of the semi-circle matches the radius of the mandrel.

5. The continuous feeding, air-filling, and centering equipment for planetary rolling of copper cast tube billets according to claim 1, characterized in that: The mandrel includes a front section and a rear section; the inflation port at the tail end of the mandrel is located at the rear section; the inflation port in the middle section of the mandrel is located at the front section; an inflation hole is opened on the side of the front section of the mandrel to serve as the inflation port in the middle section; the inflation hole is connected to the mandrel cavity; a movable ball is provided in the inflation hole, and the ball is abutted against the inflation hole by an elastic element.

6. The continuous feeding, air-filling, and centering equipment for planetary rolling of copper cast tube billets according to claim 5, characterized in that: The elastic element is positioned on the side wall of the mandrel cavity opposite the mandrel inflation hole; the elastic element abuts against the ball so that the ball is positioned against the mandrel inflation hole; this effectively enables the mandrel inflation hole of the mandrel rod to be opened and closed.

7. The continuous feeding, air-filling, and centering equipment for planetary rolling of copper cast tube billets according to claim 5, characterized in that: The mandrel inflation port includes a first section, a transition section, and a second section arranged sequentially from the side closest to the inflation chamber to the side furthest from the inflation chamber; the first section has a smaller diameter and the second section has a larger diameter. The diameter of the sphere is larger than the diameter of the first hole section and smaller than the diameter of the second hole section; the diameter of the transition hole section gradually increases as it extends from the side closer to the first hole section to the side closer to the second hole section, so as to form the abutment surface of the sphere.

8. The continuous feeding, air-filling, and centering equipment for planetary rolling of copper cast tube billets according to claim 1, characterized in that: The central clamping mechanism refers to a chuck mechanism with jaws; the hollow shaft passes through the chuck mechanism; the hollow shaft has jaw holes at the corresponding positions of the jaws; the jaws extend from the jaw holes into the hollow shaft cavity to clamp the mandrel; the shape and size of the jaw holes match the cross-section of the jaws to achieve mutual positioning between the hollow shaft and the jaws.

9. The continuous feeding, air-filling, and centering equipment for planetary rolling of copper cast tube billets according to claim 1, characterized in that: It also includes a shaft bearing mechanism for supporting and positioning the hollow shaft; the shaft bearing mechanisms are located on both sides of the central inflation mechanism.

10. The continuous feeding, air-filling, and centering equipment for planetary rolling of copper cast tube billets according to claim 9, characterized in that: The shaft bearing mechanism includes a shaft bearing mechanism one and a shaft bearing mechanism two; the shaft bearing mechanism one has an inflation channel one; the hollow shaft has an inflation channel two that communicates with the inflation channel one; when the middle inflation mechanism clamping module clamps the mandrel rod, the gas channel of the middle inflation mechanism clamping module is connected to the inflation channel two. The pneumatic clamping drive module is a cylinder; the shaft bearing mechanism 2 has an inflation channel 3; the hollow shaft has an inflation channel 4 connected to the inflation channel 3; the inflation channel 4 is connected to the cylinder.

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