Extra long copper tube automatic stretching unit

Abstract

The present invention provides an automatic stretching machine unit for super-long copper tubes to solve the problems in the prior art that the stretching machine unit is too long, occupies too large an area, is inconvenient for layout, has a low degree of automation in the production process, and has low work efficiency; the technical solution for solving the technical problem comprises a first stretching machine unit and a second stretching machine unit which are distributed in parallel, the first stretching machine unit comprises a first feeding rack and a first discharging rack, the second stretching machine unit comprises a second feeding rack and a second discharging rack, the first discharging rack and the second feeding rack are distributed side by side, a transfer mechanism is provided between the first discharging rack and the second feeding rack, which is used to transfer the workpiece on the first discharging rack to the second feeding rack, and a cutting mechanism is provided between the second feeding rack and the second discharging rack, which is used for fixed-length cutting during the stretching process of the second stretching machine unit; the present invention has a compact structure and layout, multiple stretchings are organically combined, and the actions between the mechanisms are automatically controlled, which reduces the occupied area and improves the production efficiency and product quality.

Description

Technical Field

[0001] The invention relates to the technical field of copper tube processing, in particular to an automatic stretching machine unit for super-long copper tubes. Background Art

[0002] In the process of pipe production, generally, thick and short pipes are produced first to shorten the process of producing pipe blanks, and then a stretching machine is used to draw the pipe to produce thin and long pipes. The length of the pipe will be greatly extended. In actual production, in order to ensure output quality and yield rate, the pipe fittings cannot be stretched in one go, and at least two stretchings are often required. Although the length of the pipe blank is shorter, it may reach about eight meters, and the longest can even reach more than ten meters. This results in the length becoming longer after stretching on both sides, even reaching tens of meters, which requires a production line of corresponding length to adapt to the production of pipes.

[0003] In order to meet the above production requirements, the length of the production line for one stretching can reach tens of meters. If multiple stretchings are carried out separately, the material transfer in the process will be very cumbersome and difficult, and it will easily cause deformation of the pipe and require a larger factory area.

[0004] Therefore, it is very necessary for pipe production to reduce the floor space of the pipe production line, reduce the deformation of the pipe during the transfer process, improve the transfer efficiency, and integrate the production process of the pipe to improve the production efficiency and quality of the pipe. Summary of the invention

[0005] The purpose of the present invention is to provide an automatic stretching unit for super-long copper tubes to solve the problems in the prior art that the stretching unit is too long, occupies too large an area, is inconvenient for layout, has a low degree of automation in the production process, and has low work efficiency.

[0006] The present invention provides an automatic stretching machine unit for super-long copper tubes, and its technical solution for solving the technical problem comprises a first stretching machine unit and a second stretching machine unit which are distributed in parallel, wherein the first stretching machine unit comprises a first feeding rack and a first discharging rack, and the second stretching machine unit comprises a second feeding rack and a second discharging rack, wherein the first discharging rack and the second feeding rack are distributed side by side, a transfer mechanism is provided between the first discharging rack and the second feeding rack, which is used for transferring the workpiece on the first discharging rack to the second feeding rack, and a cutting mechanism is provided between the second feeding rack and the second discharging rack, which is used for fixed-length cutting during the stretching process of the second stretching machine unit.

[0007] Preferably, it also includes a storage rack placed side by side with the first feeding rack, and the storage rack and the first feeding rack are respectively provided with a first material shifting device, a second material shifting device and a third material shifting device, which are used to transfer the materials on the storage rack to the first feeding rack by shifting.

[0008] Preferably, a temporary storage rack is provided on one side of the first feeding rack for temporarily storing pipes that do not meet the stretching requirements; a fourth material shifting device is provided on the first feeding rack for feeding the pipes on the first feeding rack into the temporary storage rack.

[0009] Preferably, a support wheel assembly is provided between the first material displacing device and the second material displacing device, and the ends of the material storage rack and the first material feeding rack are provided with a heading mechanism corresponding to the support wheel assembly, which is used to insert a core shaft into one end of the blank tube for heading.

[0010] Preferably, the first feeding rack is provided with a pinch wheel assembly corresponding to the position of the first discharging rack, and the pinch wheel assembly includes a lower supporting wheel and an upper pressing wheel, which are used to clamp the workpiece and convey it toward the first discharging rack for stretching.

[0011] Preferably, the first discharging rack is provided with a first die set at the end facing the first feeding rack, the first die set includes a die base and a fixed die plate and a movable die plate installed on the die base, the fixed die plate is provided with a first stretching die, the movable die plate is provided with a peeling die, the axes of the first stretching die and the peeling die are located on the same straight line, the fixed die plate is provided with a hydraulic cylinder for driving the movable die plate to move, the first discharging rack is also provided with a stretching trolley that can slide along the first discharging rack, the stretching trolley clamps the workpiece that passes through the first stretching die and the peeling die in sequence for stretching.

[0012] Preferably, the material transfer mechanism includes a plurality of material transfer tracks spanning the first discharging rack and the second feeding rack, each of the material transfer tracks is provided with a material transfer slider, and at least one material clamping assembly is provided under each material transfer slider for clamping the pipe fittings on the first discharging rack after the first stretching. The plurality of material transfer sliders are connected via connecting parts to form a material transfer rack, and a driving device is provided on one side of the first discharging rack, and the driving device can drive the material transfer rack to slide back and forth between the first discharging rack and the second feeding rack.

[0013] Preferably, a support assembly is provided on the second feeding rack, and a pinch wheel assembly is provided above the second feeding rack to cooperate with the support assembly to transport the workpiece toward the second discharging rack.

[0014] Preferably, a second module is provided between the cutting mechanism and the second feeding rack, and the second module comprises a mounting plate and a second stretching die mounted on the mounting plate, which is used for the second stretching of the pipe fitting; the cutting mechanism comprises a frame which can be arranged across both sides of the second discharging rack, and the frame is provided with a sawing assembly which can slide up and down, which is used for cutting the pipe fitting to a fixed length after the second stretching; the second discharging rack is provided with a stretching trolley, which is used for clamping the pipe fitting for the second stretching.

[0015] Preferably, the second discharging rack is provided with a plurality of support rollers distributed along the length direction of the second discharging rack, the support rollers are controlled by cylinders, and each support roller can be extended and retracted up and down independently to support the pipe during the second stretching process; the plurality of support rollers can rotate simultaneously to assist in the unloading of the pipe; the second discharging rack is provided with a sensor for sensing the position of the stretching trolley and sending a signal to control the action of the sawing assembly through the electronic control system.

[0016] The present invention designs two stretching units and adopts a mutually parallel structural arrangement. When laying out, the floor space occupied by the equipment can be reduced. In addition, during the second stretching, a fixed-length cutting mechanism is provided to further reduce the length of the second discharging rack and reduce the floor space. The loading and transfer processes between the two stretching units are all automatically controlled. The primary stretching and the secondary stretching are organically integrated into one, which can effectively improve the production efficiency. During the loading process, a material transfer device is used between the storage rack and the first feeding rack to effectively avoid deformation of the workpiece during the transfer process. During the first stretching process, a stretching die and a peeling die are integrated into one structure. At the same time, through the structural design of the two, the length of the head can be well reduced and pipes can be saved.

[0017] In summary, the technical solution of the present invention has at least the following beneficial effects:

[0018] 1. The layout of the two stretching units facilitates material loading and transfer, reduces floor space and improves production efficiency;

[0019] 2. The integrated stretching and cutting mechanism can meet the needs of finished products of different lengths and reduce the area occupied by the equipment;

[0020] 3. By designing the overall material storage and material distribution storage rack and the first feeding rack, the occupancy rate of auxiliary equipment such as the workshop overhead crane can be reduced;

[0021] 4. The design of the integrated stretching and peeling structure can reduce the length of the head, avoid the waste of raw materials, and improve the chip removal effect of the peeling process;

[0022] 5. The material transfer mechanism is transferred sideways, which is convenient for material transfer through automatic control and can reduce the deformation of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of 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 creative work.

[0024] Figure 1 It is a schematic diagram of the overall layout of the stretching unit of the present invention;

[0025] Figure 2 It is a schematic top view of the material storage rack and the first material feeding rack of the present invention;

[0026] Figure 3 The present invention Figure 2 Middle B view;

[0027] Figure 4 is a top view of the first module structure of the present invention;

[0028] Figure 5 This is the material transfer mechanism structure of the present invention;

[0029] Figure 6 It is a structural diagram of the second module and the cutting mechanism of the present invention;

[0030] Figure 7 It is a structural diagram of the stretching trolley of the present invention.

[0031] In the figure:

[0032] 1-first stretching unit; 101-first feeding rack; 102-first discharging rack; 103-first material shifting device; 104-second material shifting device; 105-third material shifting device; 106-temporary material storage rack; 107-fourth material shifting device 108-first die set; 1081-first stretching die; 1082-skinning die; 1083-hydraulic cylinder;

[0033] 2-second stretching unit; 201-second feeding rack; 202-second discharging rack; 203-second die set; 2031-second stretching die;

[0034] 3- material transfer mechanism, 301- material transfer track, 302- material transfer slider, 303- servo motor, 304- material clamping assembly;

[0035] 4-cutting mechanism, 401-frame, 402-sawing assembly;

[0036] 5-Storage rack;

[0037] 6- stretching trolley; 601- clamping claw; 602- slider. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0039] By the attached Figure 1-7 It can be seen that the present invention includes a first stretching unit 1 and a second stretching unit 2 that are arranged in parallel, the first stretching unit 1 includes a first feeding rack 101 and a first discharging rack 102, the second stretching unit 2 includes a second feeding rack 201 and a second discharging rack 202, the first discharging rack 102 and the second feeding rack 201 are arranged side by side, a transfer mechanism 3 is provided between the first discharging rack 102 and the second feeding rack 201, which is used to transfer the workpiece on the first discharging rack 102 to the second feeding rack 201, and a cutting mechanism 4 is provided between the second feeding rack 201 and the second discharging rack 202, which is used for fixed-length cutting during the stretching process of the second stretching unit 2; the present invention arranges the two stretching units in parallel, as shown in the attached Figure 1 As shown, in the specific layout, the first feeding rack 101 and the first discharging rack 102 are on the same straight line, which are used to complete the first stretching. The first discharging rack 102 and the second feeding rack 201 are arranged side by side, so that the workpiece on the first discharging rack 102 after the first stretching is transferred to the second feeding rack 201, so as to realize the side loading of the workpiece, and the workpiece is transferred between the first discharging rack 102 and the second feeding rack 201 through the transfer mechanism 3; the transferred workpiece is stretched for the second time between the second feeding rack 201 and the second discharging rack 202. In addition, since the length of the pipe becomes longer relative to the length of the blank after the first stretching, if the pipe is stretched for the second time, the length of the pipe will be further lengthened. If no cutting process is performed at this time, the length of the production line will become very long, occupying a large amount of workshop area, and it is also inconvenient for subsequent processes of the pipe fittings. By designing a cutting mechanism between the second feeding rack 201 and the second discharging rack 202, the workpiece after the second stretching is cut to a fixed length, which can effectively reduce the length of the second discharging rack 202 and reduce the floor space, which is convenient for the layout of workshop equipment. At the same time, the cutting length of the pipe fitting can be set as needed, and the degree of automation is high. The present invention realizes the automatic transfer of the two stretching processes of the same pipe fitting by designing a compact arrangement relationship between the two stretching units, thereby improving work efficiency. At the same time, this arrangement can effectively reduce the floor space of the entire production line.

[0040] The present invention also includes a storage rack 5 placed side by side with the first feeding rack 101, and the storage rack 5 and the first feeding rack 101 are respectively provided with a first material shifting device 103, a second material shifting device 104 and a third material shifting device 105, which are used to transfer the materials on the storage rack 5 to the first feeding rack 101 by shifting. The storage rack 5 is used for storing pipe blanks. During specific production, the blanks to be processed are stacked on the storage rack 5 through auxiliary equipment such as an overhead crane or a crane as a production standby. When in use, the blanks on the storage rack 5 are transferred one by one to the first feeding rack 101 through multiple material shifting devices for the first stretching process. Such a structural design reduces the occupancy rate of the workshop overhead crane, and one loading can meet the long-term stretching needs, thereby improving work efficiency.

[0041] One of the embodiments of the present invention is that, since the blank needs to be quality inspected before stretching during the production process, a temporary storage rack 106 is provided on one side of the first feeding rack 101 for temporarily storing pipe fittings that do not meet the stretching requirements; the first feeding rack 101 is provided with a fourth material shifting device 107 for feeding the pipe fittings on the first feeding rack 101 into the temporary storage rack 106. Pipe fittings that do not meet the quality inspection requirements are processed in a centralized manner to avoid defective products and to prevent unqualified pipe fittings from having nowhere to be stored, which affects work efficiency.

[0042] Before the pipe is stretched, it is generally necessary to head the pipe. In the present invention, a support wheel assembly is provided between the first material dispensing device 103 and the second material dispensing device 104. The storage rack 5 and the end of the first feeding rack 101 are provided with a heading mechanism corresponding to the support wheel assembly, which is used to insert a core shaft into one end of the blank pipe for heading. A heading station is added between the storage rack 5 and the stretching station of the first material rack 101, so as to realize the compactness of the overall equipment.

[0043] In order to realize the first stretching on the first feeding rack 101, a pinch wheel assembly corresponding to the position of the first discharging rack 102 is provided on the first feeding rack 101. The pinch wheel assembly includes a lower supporting wheel and an upper pressing wheel, which are used to clamp the workpiece and transport it toward the first discharging rack 102 for stretching. The lower tug wheel supports the pipe fittings, and a motor (not shown in the figure) is designed below the first feeding rack 102 to drive the lower tug wheel to rotate, thereby providing power for conveying the pipe fittings.

[0044] In order to better achieve the quality of pipe fittings and improve production efficiency, a first die set 108 is provided at the end of the first discharging rack 102 facing the first feeding rack 101, and the first die set 108 includes a die base and a fixed die plate and a movable die plate installed on the die base, the fixed die plate is provided with a first stretching die 1081, and the movable die plate is provided with a peeling die 1082, the axes of the first stretching die 1081 and the peeling die 1082 are located on the same straight line, and a hydraulic cylinder 1083 for driving the movable die plate to move is installed on the fixed die plate, and the first discharging rack 102 is also provided with a stretching trolley 6 that can slide along the first discharging rack 102, and the stretching trolley 6 clamps the workpiece that passes through the first stretching die 1081 and the peeling die 1082 in sequence for stretching, and the workpiece passes through the first stretching die 1081 and the peeling die 1082. The position design of the die 1082 allows the pipe to be stripped while being stretched. At the same time, a movable stripping die 1082 structure is designed, and the movement of the stripping die 1082 along the stretching direction is controlled by the hydraulic cylinder 1083. In the initial state, the first stretching die 1081 and the stripping die 1082 are arranged in a close fit, and the pipe passes through the first stretching die 1081 and the stripping die 1082 in turn and is connected to the stretching trolley 6, which can reduce the length of the pipe head required for the clamping process and reduce the length of the pipe occupied by the head. During stretching, the hydraulic cylinder 1083, under the action of the electronic control system, will move a certain distance with the stretching trolley 6, so that the first stretching die 1081 and the stripping die 1082 are at a certain distance, which serves as a waste discharge space for the stripping of the pipe, and can effectively shorten the head length of the pipe and ensure a good chip removal effect.

[0045] As attached Figure 5 As shown; the material transfer mechanism 3 includes a plurality of material transfer tracks 301 straddling the first material discharging rack 102 and the second material feeding rack 201, each material transfer track 301 is provided with a material transfer slider 302, and at least one material clamping assembly is provided below each material transfer slider 302 for clamping the pipe fittings on the first material discharging rack 102 after the first stretching, the plurality of material transfer sliders 302 are connected by connecting pieces to form a material transfer rack, and a driving device is provided on one side of the first material discharging rack 102, and the driving device can drive the material transfer rack to move forward on the first material discharging rack 10 2 and the second feeding rack 201 reciprocate; the material transfer slider 302 is driven by a chain or other mechanism that can reciprocate, and is driven by a servo motor 303. A clamping assembly 304 is provided at the lower part of the material transfer slider 302. The clamping assembly 304 can be controlled by a cylinder to move up and down as well as to be loosened and clamped, so as to clamp the workpiece after the first stretching on the first unloading rack 102, and then transfer it, wherein the up and down movement is controlled by a sliding cylinder 305, and the loosening and clamping of the clamping assembly 304 is controlled by a clamping cylinder 306.

[0046] The workpiece is transferred to the support assembly on the second feeding rack 201 through the above-mentioned transfer machine 3. A pinch wheel assembly is provided above the second feeding rack 201 to cooperate with the support assembly to transport the workpiece toward the second unloading rack 202.

[0047] In the present invention, the second module 203 is arranged between the cutting mechanism 4 and the second feeding rack 201, and the second module 203 includes a mounting plate and a second stretching die 2031 mounted on the mounting plate, which is used for the second stretching of the pipe fitting; the cutting mechanism 4 includes a frame 401 that can be arranged across both sides of the second discharge rack 202, and the frame 401 is provided with a sawing assembly 402 that can slide up and down, which is used to cut the pipe fittings to a fixed length after the second stretching; the second discharge rack 202 is provided with a stretching trolley 6, which is used to clamp the pipe fittings for the second stretching; the up and down movement of the sawing assembly 402 is controlled by a cylinder, and a sensor (not marked in the figure) for sensing the position of the stretching trolley 6 is provided at the tail end of the second discharge rack 202, and the sensor can send a signal to the electric control system to control the action of the sawing assembly 402 and the stretching trolley to realize automatic control. The cutting tool used in the sawing assembly 402 in the present invention is a saw blade, which is driven by a motor to rotate to provide cutting force.

[0048] After the second stretching, the diameter of the pipe is generally smaller. In order to reduce the deformation of the pipe during the stretching process, a plurality of support rollers distributed along the length direction of the second discharging rack 202 are provided on the second discharging rack 202. The support rollers are controlled by cylinders, and each support roller can be extended and retracted up and down independently to support the pipe during the second stretching process. During the stretching process, the support rollers can be raised and supported on the lower outer surface of the pipe in sequence under the action of the electronic control system. After the pipe is cut off, the plurality of support rollers can rotate to both sides at the same time, and the stretching trolley 6 releases the clamping of the workpiece. The pipe can fall off the second discharging rack 202 under the action of gravity to realize the unloading of finished products in this process.

[0049] During the stretching process of the stretching trolley 6 on the pipe fitting, the clamping claw 601 provided on the stretching trolley 6 clamps one end of the workpiece for stretching. Figure 7 As shown, the stretching trolley 6 is installed on the discharge rack through the sliders 602 on both sides, and the clamping jaws are controlled by the electric control system through pneumatic means and the cooperation of springs and connecting rods, so as to facilitate the loosening and clamping of the clamping jaws.

[0050] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. Extra long copper tube automatic stretching unit, characterized by: The invention comprises a first stretching unit and a second stretching unit which are arranged in parallel, wherein the first stretching unit comprises a first feeding rack and a first discharging rack, and the second stretching unit comprises a second feeding rack and a second discharging rack, wherein the first discharging rack and the second feeding rack are arranged side by side, and a transfer mechanism is arranged between the first discharging rack and the second feeding rack for transferring the workpiece on the first discharging rack to the second feeding rack, and a cutting mechanism is arranged between the second feeding rack and the second discharging rack for fixed-length cutting during the stretching process of the second stretching unit; the transfer mechanism comprises a plurality of transfer tracks which are arranged across the first discharging rack and the second feeding rack, each transfer track is provided with a transfer slider, and at least one clamping assembly is arranged under each transfer slider for clamping the workpiece on the first discharging rack after the first stretching, and a plurality of transfer sliders are connected via a connecting piece to form a transfer rack, and a driving device is arranged on one side of the first discharging rack, and the The driving device can drive the rotating rack to slide back and forth between the first unloading rack and the second feeding rack; the second feeding rack is provided with a supporting assembly, and the transferring mechanism transfers the workpiece to the supporting assembly on the second feeding rack; the second unloading rack is provided with a stretching trolley for clamping the workpiece for a second stretching; the second unloading rack is provided with a plurality of supporting rollers distributed along the length direction of the second unloading rack, the supporting rollers are controlled by a cylinder, and each supporting roller can be extended and retracted up and down independently to support the workpiece during the second stretching process; a plurality of supporting rollers can rotate at the same time to assist in unloading the workpiece; the second unloading rack is provided with a position sensor for sensing the position of the stretching trolley and sending a signal to control the action of the sawing assembly through the electronic control system. After the workpiece is cut off, the supporting rollers can rotate to both sides at the same time, and the stretching trolley releases the clamping of the workpiece, and the pipe fittings can fall off the second unloading rack under the action of gravity.

2. The super-long copper tube automatic stretching unit according to claim 1 is characterized in that: It also includes a storage rack placed side by side with the first feeding rack, and the storage rack and the first feeding rack are respectively provided with a first material shifting device, a second material shifting device and a third material shifting device for shifting the material on the storage rack to the first feeding rack.

3. The super-long copper tube automatic stretching unit according to claim 2 is characterized in that: A temporary storage rack is provided on one side of the first feeding rack for temporarily storing workpieces that do not meet the stretching requirements; a fourth material shifting device is provided on the first feeding rack for feeding the workpieces on the first feeding rack into the temporary storage rack.

4. The super-long copper tube automatic stretching unit according to claim 2 is characterized in that: A support wheel assembly is provided between the first material displacing device and the second material displacing device, and a head making mechanism corresponding to the support wheel assembly is provided at the end of the material storage rack and the first material feeding rack for inserting a core shaft into one end of the blank workpiece for head making.

5. The super-long copper tube automatic stretching unit according to claim 2 is characterized in that: The first feeding rack is provided with a pinch wheel assembly corresponding to the position of the first discharging rack. The pinch wheel assembly includes a lower supporting wheel and an upper pressing wheel, which are used to clamp the workpiece and convey it toward the first discharging rack for stretching.

6. The automatic stretching machine for ultra-long copper tubes according to any one of claims 1 to 5, characterized in that: The first discharging rack is provided with a first die set at the end facing the first feeding rack, and the first die set includes a die base and a fixed die plate and a movable die plate installed on the die base; the fixed die plate is provided with a first stretching die, and the movable die plate is provided with a peeling die; the axes of the first stretching die and the peeling die are located on the same straight line; a hydraulic cylinder for driving the movable die plate to move is installed on the fixed die; the first discharging rack is also provided with a stretching trolley that can slide along the first discharging rack, and the stretching trolley clamps the workpiece that passes through the first stretching die and the peeling die in sequence for stretching.

7. The super-long copper tube automatic stretching unit according to claim 6 is characterized in that: A pinch wheel assembly is provided above the second feeding rack, cooperating with the supporting assembly to transport the workpiece toward the second discharging rack.

8. The super-long copper tube automatic stretching unit according to claim 1 is characterized in that: A second die set is provided between the cutting mechanism and the second feeding rack, and the second die set includes a mounting plate and a second stretching die installed on the mounting plate, which is used for the second stretching of the workpiece; the cutting mechanism includes a frame that can be straddled on both sides of the second discharging rack, and the frame is provided with a sawing assembly that can slide up and down, which is used to cut the workpiece to a fixed length after the second stretching.

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