A metal tube precision drawing and sleeve reinforcement device

Abstract

The present invention discloses a metal tube precision drawing and reinforcement device, which belongs to the technical field of cold drawing and precision drawing of metal tubes. The reinforcement frame comprises a reinforcement frame, a receiving rod, a supporting mechanism for horizontally supporting the receiving rod, a lifting mechanism capable of lifting the receiving rod at one end close to the precision drawing device to the discharge end of the feeding device, a pulling mechanism capable of pulling the receiving rod before lifting and axially away from the precision drawing device, and an elastic reset mechanism capable of resetting the receiving rod after being lowered during the release process of the pulling mechanism. The receiving rod is provided with a limiting push head at one end away from the precision drawing device, which can push the metal tube to the precision drawing position of the precision drawing device during the reset process. The metal tube can be automatically reinforced and the metal tube can be automatically and effectively fed to the precision drawing position of the precision drawing device for precision drawing after reinforcement is completed. The receiving rod is pre-lifted and aligned with the discharge end of the feeding device, which can ensure that the metal tube is accurately inserted into the receiving rod, and the problem of the metal tube and the receiving rod being misaligned and falling off will not occur.

Description

Technical Field

[0001] The invention relates to the technical field of cold-drawing precision drawing of metal tubes, in particular to a precision drawing and sleeve reinforcement device for metal tubes. Background Art

[0002] Precision drawing is also called cold extrusion, which is an important part of precision plastic bulk forming technology. Cold extrusion refers to placing a metal blank into a mold cavity in a cold state, and forcing the metal to be squeezed out of the mold cavity under strong pressure and a certain speed, thereby obtaining an extruded part with the desired shape, size and certain mechanical properties. Cold extrusion technology is an advanced production process technology with high precision, high efficiency, high quality and low consumption. Compared with hot forging and warm forging processes, it can save 30% to 50% of materials and 40% to 80% of energy, and can also improve the quality of forgings and improve the working environment. The existing precision drawing process usually uses manual labor to take the metal pipe from the material rack and manually put the metal pipe into the tie rod. The metal pipe is usually more than 4 meters long, and it is necessary to repeatedly grab the metal pipe so that it can be continuously put into the tie rod starting from the head of the metal pipe. Since the inner mold assembled on the tie rod head is in close contact with the inner wall of the metal pipe and there is lubricating grease on the outside of the metal pipe, the hands are easy to slip when grabbing it. Therefore, the pipe threading operation requires grabbing the metal pipe with great force to make it completely inserted into the tie rod. This process consumes a lot of physical strength of the operator, the labor intensity of the operator is high, the speed is slow and the efficiency is low.

[0003] To this end, the patent number “201120319773.8”, and the name of the patent is “A Tube Drawing Machine”, which discloses a tube drawing device capable of automatically sleeve reinforcement, including a frame, a die base, a stretching trolley, and a drive device, as well as a loading device arranged on the frame, the loading device including a storage rack, a material dispenser, a conveying device, and a loading bracket located at the feed of the tube drawing machine, wherein the conveying device includes a trough for holding processed tubes and a conveying wheel driven by a motor placed in the trough. The processed tubes stored on the storage rack can be transferred to the conveying device by the material dispenser, and then transferred to the loading bracket by the conveying wheel driven by the motor, and finally can be sleeved into the core rod (tension rod) of the tube drawing machine, thereby realizing the automatic sleeve reinforcement of the processed tubes, thereby improving work efficiency and reducing labor intensity. However, the above patent can only realize automatic reinforcement, and cannot automatically send the metal tube to the drawing die of the fine drawing device after reinforcement. At the same time, the above patent relies on the metal tube to slide freely on the loading bracket to be inserted into the core rod when reinforcement, which has low accuracy. Once the metal tube deviates during the sliding process, it will miss the core rod and fall. Summary of the Invention

[0004] The purpose of the present invention is to solve the above-mentioned technical problems and provide a metal tube precision drawing and reinforcement device, which can not only automatically complete the reinforcement of the metal tube, but also automatically and effectively send the metal tube to the precision drawing position of the precision drawing equipment for precision drawing after the reinforcement is completed, and the receiving rod is pre-lifted to align with the discharge end of the feeding device, which can ensure that the metal tube is accurately inserted into the receiving rod, and the problem of the metal tube and the receiving rod being misaligned and falling off will not occur.

[0005] To achieve the above-mentioned objectives, the present invention provides the following solutions: The present invention discloses a metal tube precision drawing reinforcement device, including a reinforcement frame, the reinforcement frame is provided with a receiving rod, a supporting mechanism for horizontally supporting the receiving rod, a lifting mechanism capable of lifting the receiving rod at one end close to the precision drawing device to the discharge end of the feeding device, a pulling mechanism capable of pulling the receiving rod before lifting and axially away from the precision drawing device, and an elastic reset mechanism capable of resetting the receiving rod after being lowered during the release process of the pulling mechanism, and the end of the receiving rod away from the precision drawing device is provided with a limiting push head capable of pushing the metal tube to the precision drawing position of the precision drawing device during the reset process.

[0006] Preferably, the supporting mechanism includes a supporting roller and a guide sleeve sleeved on the receiving rod, the guide sleeve is fixed on the sleeve frame close to the limiting push head, and the supporting roller is close to the fine drawing device.

[0007] Preferably, the lifting mechanism includes a plurality of lifting cylinders arranged along the axial direction of the receiving rod, the lifting cylinders are fixed on the rib rack, and a supporting ring sleeved on the outside of the receiving rod is fixed on the cylinder shaft of the lifting cylinder.

[0008] Preferably, a supporting roller is provided in the supporting ring.

[0009] Preferably, the wheel surfaces of the supporting roller and the support roller are both V-shaped.

[0010] Preferably, the lifting cylinder is fixed to the rib frame through a cylinder mounting plate, and the cylinder mounting plate is slidably connected to guide columns located on both sides of the lifting cylinder. The top of the guide column is provided with a lifting block fixedly connected to the cylinder shaft of the lifting cylinder, and the supporting ring is fixed on the lifting block.

[0011] Preferably, the elastic reset mechanism includes reset springs provided on both sides of the receiving rod, one end of the reset spring is fixedly connected to the sleeve frame, and the other end of the reset spring is fixedly connected to the limiting push head.

[0012] Preferably, the pulling mechanism includes a mounting frame fixed on the sleeve frame, the mounting frame is provided with a telescopic mechanism arranged along the axis of the guide sleeve, and a buckling column capable of pulling the reset spring is fixed to the telescopic end of the telescopic mechanism.

[0013] Preferably, the telescopic mechanism comprises a telescopic cylinder fixed on the mounting frame, and the cylinder shaft of the telescopic cylinder is fixedly connected to the buckle column.

[0014] Preferably, the mounting frame is provided with guide rods located on both sides of the cylinder shaft of the telescopic cylinder, the guide rods are parallel to the axis of the guide sleeve, the end of the cylinder shaft of the telescopic cylinder is fixed with a guide slider slidably connected to the guide rod, the buckling column is vertically fixed on the guide slider, and the end of the buckling column is located between the reset spring and the receiving rod.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] 1. The metal tube fine drawing reinforcement device of the present invention comprises a reinforcement frame, on which a receiving rod, a supporting mechanism, a lifting mechanism, a pulling mechanism and an elastic reset mechanism are provided. Under the action of the supporting mechanism, the receiving rod can be kept in a horizontal state in the initial state, and then the receiving rod is moved away from the fine drawing device under the action of the pulling mechanism, and the receiving rod is lifted to the feeding device close to one end of the fine drawing device under the action of the lifting mechanism. After the metal tube comes out from the discharge end of the feeding device, it will automatically be inserted into the receiving rod, thereby completing the reinforcement function; then the lifting mechanism lowers the receiving rod, and the pulling mechanism During the process of releasing the receiving rod by the pulling mechanism, the elastic reset mechanism can provide elastic reset force for the limit push head. Driven by the limit push head, after the receiving rod is reset into position, the metal tube can be pushed to the fine drawing position of the fine drawing equipment for fine drawing, thereby completing the feeding and fine drawing function. The purpose of automatic reinforcement and the purpose of feeding and fine drawing after reinforcement are achieved through a reinforcement device; and the receiving rod is lifted to the discharge end of the feeding device in advance, which can ensure that the receiving rod is aligned with the end of the metal tube, thereby ensuring that the metal tube is accurately inserted into the receiving rod, and there will be no problem of the metal tube and the receiving rod being misaligned and falling off.

[0017] 2. The supporting mechanism of the present invention includes supporting rollers and guide sleeves, which can support both ends of the receiving rod to ensure that it can stably maintain a horizontal state and can stably move axially.

[0018] 3. In the present invention, a supporting ring is fixed on the cylinder shaft of the lifting cylinder. On the one hand, it can play a supporting role together with the support roller and the guide sleeve when the receiving rod is not lifted, thereby improving the supporting effect. On the other hand, it can lift the receiving rod when the cylinder shaft of the lifting cylinder is extended.

[0019] 4. The elastic reset mechanism in the present invention adopts two reset tension springs respectively arranged on both sides of the receiving rod. When the pulling mechanism pulls the receiving rod backward, the reset tension spring is stretched to accumulate elastic potential energy, and then shortened to release elastic potential energy when the pulling mechanism is released, thereby providing a reset elastic force for the receiving rod. The use of the reset tension spring is simple, direct and effective.

[0020] 5. The pulling mechanism of the present invention includes a method of cooperating the cylinder shaft of the telescopic cylinder with the buckle column. When the cylinder shaft of the telescopic cylinder contracts, the buckle column will lengthen the reset spring. When the cylinder shaft of the telescopic cylinder extends, the reset spring will shorten. The pulling method is simple and effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of a metal tube precision drawing and sleeve reinforcement device;

[0023] Figure 2 This is a front view of a metal tube precision drawing and reinforcement device;

[0024] Figure 3 This is a schematic diagram of the front three-dimensional structure of a metal tube precision drawing and sleeve reinforcement device equipped with a pulling mechanism;

[0025] Figure 4 This is a schematic diagram of the back three-dimensional structure of a metal tube precision drawing and sleeve reinforcement device equipped with a pulling mechanism;

[0026] Figure 5 This is a schematic diagram of the three-dimensional structure of a metal tube fine drawing reinforcement device near one end of the fine drawing device.

[0027] Explanation of the accompanying symbols: 1. Reinforcement frame; 2. Support rod; 3. Limit push head; 4. Support ring; 5. Guide sleeve; 6. Support roller; 7. Lifting cylinder; 8. Guide column; 9. Lifting block; 10. Reset spring; 11. Mounting frame; 12. Buckling column; 13. Telescopic cylinder; 14. Guide rod; 15. Guide slide; 16. Biting car; 17. Fine drawing frame; 18. Drawing die; 19. Drawing mouth; 20. Feeding device; 21. Support inner die; 22. Connecting frame; 23. Support roller. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] This embodiment provides a metal tube precision drawing and sleeve reinforcement device, such as Figures 1 to 5 As shown, it includes a sleeve reinforcement frame 1, on which a receiving rod 2, a supporting mechanism, a lifting mechanism, a pulling mechanism and an elastic reset mechanism are provided; the supporting mechanism is used to support the receiving rod 2, and the receiving rod 2 can maintain a horizontal state when placed on the supporting mechanism; the pulling mechanism is used to pull the receiving rod 2, so that the receiving rod 2 moves in a direction away from the fine drawing device; the lifting mechanism is used to lift the receiving rod 2 away from the fine drawing device and close to the fine drawing device, and lift it to the discharge end of the feeding device 20, for receiving the metal pipe delivered by the feeding device 20, and after receiving The receiving rod 2 with the metal tube is lowered so that the receiving rod 2 and the metal tube are placed on the supporting mechanism together; the elastic reset mechanism is used to provide elastic reset force for the receiving rod 2 after being lowered during the release process of the pulling mechanism to ensure that it can return to its original position; the receiving rod 2 is provided with a limit push head 3 at the end away from the fine drawing device. On the one hand, the limit push head 3 can prevent the metal tube from sliding out of the receiving rod 2 when the receiving rod 2 receives the metal tube, and on the other hand, it can push the metal tube to the fine drawing position of the fine drawing device after the receiving rod 2 is reset. Preferably, the receiving rod 2 is provided with a support inner mold 21 at the end close to the fine drawing device. When the metal tube is sleeved on the receiving rod 2, the support inner mold 21 can fit with the inner wall of the metal tube to ensure that the metal tube is coaxial with the receiving rod 2.

[0030] The fine drawing device generally includes a fine drawing frame 17, to which a biting trolley 16 is slidably connected. A drawing die 18 is provided at one end of the fine drawing frame 17 near the sleeve frame 1, and a drawing opening 19 is provided on the drawing die 18. The biting trolley 16 is located on the side of the drawing opening 19 away from the sleeve frame 1, and the receiving rod 2 is located on the other side of the drawing opening 19. When the receiving rod 2 is placed on the supporting mechanism, the receiving rod 2 and the drawing opening 19 are arranged nearly coaxially. A feeding device 20 is located above the fine drawing device.

[0031] Working principle:

[0032] First, the pulling mechanism is started, and the receiving rod 2 placed horizontally on the supporting mechanism is moved away from the drawing port 19 along its axial direction, and stops moving after moving into position. At this time, the elastic reset mechanism generates elastic potential energy; then, the lifting mechanism is started, and the lifting mechanism lifts the end of the receiving rod 2 close to the drawing die 18, so that this end of the receiving rod 2 rises to the discharge end of the feeding device 20. At this time, the receiving rod 2 is in an inclined state as a whole (such as Figure 2 As shown); then, the feeding device 20 is started, and a metal tube is fed out from the discharge end of the feeding device 20 and is inserted into the end of the receiving rod 2. Under continuous feeding, the metal tube will continue to be inserted into the receiving rod 2. After it is completely inserted, the feeding device 20 is stopped, and the reinforcement is completed; then, the lifting mechanism is lowered, and the receiving rod 2 together with the metal tube is lowered onto the supporting mechanism, and the pulling mechanism is started to gradually release the receiving rod 2. The elastic reset mechanism releases the elastic potential energy, providing elastic force to make the receiving rod 2 move coaxially toward the drawing port 19. At this time, the metal tube moves toward the drawing mouth 19 under the push of the limiting push head 3, and after the receiving rod 2 is completely reset, the end of the metal tube also passes through the drawing mouth 19 and is bitten by the opposite biting car 16. Usually, the end of the metal tube will be pre-processed with a 10 cm reduced diameter section, and the diameter of the reduced diameter section is smaller than the drawing mouth 19, so it can pass through the drawing mouth 19; finally, the biting car 16 moves away from the drawing mouth 19, and under the drive of the biting car 16, the metal tube is forcefully pulled out of the drawing mouth 19 to complete the cold drawing (fine drawing).

[0033] In this embodiment, Figures 1 to 5 As shown, the supporting mechanism includes a supporting roller 23 and a guide sleeve 5. The guide sleeve 5 is fixed on the sleeve frame 1 near the limiting push head 3. The supporting roller 23 is close to the fine drawing device and fixed on the sleeve frame 1. One end of the receiving rod 2 extends into the guide sleeve 5, and the other end is placed on the supporting roller 23. The guide sleeve 5 has a sufficient diameter to allow the receiving rod 2 to be lifted upward.

[0034] In this embodiment, Figures 1 to 5 As shown, the lifting mechanism includes several lifting cylinders 7, which are fixed on the reinforcing frame 1 and located between the guide sleeve 5 and the support roller 23. Several lifting cylinders 7 are arranged in sequence along the axial direction of the receiving rod 2. A supporting ring 4 is fixed on the cylinder shaft of the lifting cylinder 7. The supporting ring 4 is sleeved on the receiving rod 2. The cylinder shaft of the lifting cylinder 7 is extended, and the supporting ring 4 lifts the receiving rod 2 to achieve lifting. During lifting, several lifting cylinders 7 are lifted at the same time. By equipping the cylinder shafts of several lifting cylinders 7 with different lifts, the receiving rod 2 can be formed into an inclination angle. Preferably, because the receiving rod 2 is long, at least three lifting cylinders 7 are required to prevent the receiving rod 2 from bending.

[0035] Furthermore, in this embodiment, in order to facilitate the metal tube to slide to the support ring 4 when the reinforcement is sleeved, it can be smoothly sleeved onto the receiving rod 2. Figures 1 to 5 As shown, a supporting roller 6 for supporting the receiving rod 2 is provided in the supporting ring 4 , and the rolling of the supporting roller 6 facilitates the metal pipe to continue sliding through the supporting ring 4 .

[0036] Furthermore, in this embodiment, Figures 1 to 5As shown, the wheel surfaces of the supporting roller 6 and the support roller 23 are both V-shaped. The V-shaped wheel surface can limit the radial direction to a certain extent, preventing the receiving rod 2 and the metal tube from shaking left and right when moving axially.

[0037] In this embodiment, Figures 1 to 5 As shown, the lifting cylinder 7 is fixed to the reinforcing frame 1 via a cylinder mounting plate. Two guide posts 8 are slidably connected to the cylinder mounting plate. The two guide posts 8 are located on both sides of the lifting cylinder 7. A lifting block 9 is fixed to the top of the guide post 8. The lifting block 9 is fixedly connected to the cylinder shaft of the lifting cylinder 7, and the supporting ring 4 is fixed to the lifting block 9. When the cylinder shaft of the lifting cylinder 7 extends, it will lift the lifting block 9. After lifting the supporting ring 4, the supporting ring 4 can lift the receiving rod 2. During the lifting process of the lifting block 9, the two guide posts 8 can ensure the stability of the vertical extension of the cylinder shaft, and the problem of left and right shaking will not occur.

[0038] In this embodiment, Figures 1 to 5 As shown, the elastic reset mechanism includes two reset springs 10, which are respectively arranged on both sides of the receiving rod 2. One end of the reset spring 10 is fixed to the sleeve frame 1, and the other end is connected to the limit push head 3. When the pulling mechanism pulls the receiving rod 2 backward (moving away from the drawing port 19), the reset spring 10 will be stretched, accumulating elastic potential energy. When the pulling mechanism gradually releases the receiving rod 2 forward, the reset spring 10 will shorten, releasing the elastic potential energy, providing an elastic reset force for the limit push head 3, and the limit push head 3 pushes the receiving rod 2 and the metal tube forward. Of course, a reset compression spring can also be used, with one end of the reset compression spring fixed to the limit push head 3 and the other end arranged on the sleeve frame 1 behind the limit push head 3. When the pulling mechanism pulls the receiving rod 2 backward, the reset compression spring will be compressed, accumulating elastic potential energy. When the pulling mechanism is released forward, the reset compression spring will extend, releasing the elastic potential energy. Of course, other elastic reset components and corresponding settings on the market can also be used, which will not be described here, as long as they can achieve the above functions.

[0039] In this embodiment, Figures 1 to 5 As shown, the pulling mechanism includes a mounting frame 11 fixed to the reinforcing frame 1, and a telescopic mechanism arranged along the axis of the guide sleeve 5 is provided on the mounting frame 11. The telescopic end of the telescopic mechanism is fixed with a buckling column 12 capable of pulling the reset spring 10. Pulling the reset spring 10 through the buckling column 12 can pull the limit push head 3 fixedly connected to the reset spring 10.

[0040] Furthermore, in this embodiment, Figures 1 to 5 As shown, the telescopic mechanism includes a telescopic cylinder 13 fixed on the mounting frame 11 , and the cylinder shaft of the telescopic cylinder 13 is fixedly connected to the buckle column 12 .

[0041] Furthermore, in this embodiment, Figures 1 to 5 As shown, the mounting frame 11 is provided with guide rods 14 located on both sides of the cylinder shaft of the telescopic cylinder 13. The guide rods 14 are parallel to the axis of the guide sleeve 5. The end of the cylinder shaft of the telescopic cylinder 13 is fixed with a guide slider 15, which is slidably connected to the guide rod 14. The buckle column 12 is vertically fixed to the guide slider 15, and the end of the buckle column 12 is located between the reset spring 10 and the receiving rod 2. Preferably, the top of the buckle column 12 is fixedly connected to the guide slider 15, and the bottom of the buckle column 12 is fixedly connected to the guide rod 14 through a connecting frame 22. The guide rod 14, the connecting frame 22 and the buckle column 12 form a ring structure, which encloses the reset spring 10 therein to prevent the reset spring 10 from detaching from the buckle column 12 and being unable to be pulled. Preferably, two buckle columns 12 can be provided, and the two buckle columns 12 respectively enclose the two reset springs 10.

[0042] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A metal tube precision drawing and sleeve reinforcement device, characterized in that: The cam is provided with a support rod, a supporting mechanism for horizontally supporting the support rod, a lifting mechanism capable of lifting one end of the support rod close to the fine drawing device to the discharge end of the feeding device, a pulling mechanism capable of pulling the support rod and axially away from the fine drawing device before lifting, and an elastic reset mechanism capable of resetting the lowered support rod during the release process of the pulling mechanism, wherein the end of the support rod away from the fine drawing device is provided with a limit push head capable of pushing the metal pipe to the fine drawing position of the fine drawing device during the reset process; The feeding device is located above the fine drawing device; The elastic reset mechanism includes a reset spring provided on both sides of the receiving rod, one end of the reset spring is fixedly connected to the sleeve frame, and the other end of the reset spring is fixedly connected to the limit push head; The supporting mechanism includes a supporting roller and a guide sleeve sleeved on the receiving rod, the guide sleeve is fixed on the sleeve frame close to the limit push head, and the supporting roller is close to the fine drawing device; The lifting mechanism includes a plurality of lifting cylinders arranged along the axial direction of the receiving rod, the lifting cylinders are fixed on the sleeve reinforcement frame, and a supporting ring sleeved on the outside of the receiving rod is fixed on the cylinder shaft of the lifting cylinder.

2. A metal tube precision drawing and sleeve reinforcement device according to claim 1, characterized in that: A supporting roller is provided in the supporting ring.

3. A metal tube precision drawing and sleeve reinforcement device according to claim 2, characterized in that: The wheel surfaces of the supporting roller and the support roller are both V-shaped.

4. A metal tube precision drawing and sleeve reinforcement device according to claim 3, characterized in that: The lifting cylinder is fixed to the rib frame through a cylinder mounting plate, and the cylinder mounting plate is slidably connected to guide columns located on both sides of the lifting cylinder. The top of the guide column is provided with a lifting block fixedly connected to the cylinder shaft of the lifting cylinder, and the supporting ring is fixed on the lifting block.

5. The metal tube precision drawing and sleeve reinforcement device according to claim 1, characterized in that: The pulling mechanism includes a mounting frame fixed on the sleeve frame, the mounting frame is provided with a telescopic mechanism arranged along the axis of the guide sleeve, and a buckling column capable of pulling the reset tension spring is fixed at the telescopic end of the telescopic mechanism.

6. A metal tube precision drawing and sleeve reinforcement device according to claim 5, characterized in that: The telescopic mechanism comprises a telescopic cylinder fixed on the mounting frame, and the cylinder shaft of the telescopic cylinder is fixedly connected to the buckle column.

7. A metal tube precision drawing and sleeve reinforcement device according to claim 6, characterized in that: The mounting frame is provided with guide rods located on both sides of the cylinder shaft of the telescopic cylinder, the guide rods are parallel to the axis of the guide sleeve, the end of the cylinder shaft of the telescopic cylinder is fixed with a guide slider slidably connected to the guide rod, the buckling column is vertically fixed on the guide slider, and the end of the buckling column is located between the reset spring and the receiving rod.

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