CN109013791B - Pipe fitting channeling machine and channeling process of pipe fitting end part thereof - Google Patents
Pipe fitting channeling machine and channeling process of pipe fitting end part thereof Download PDFInfo
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- CN109013791B CN109013791B CN201811246451.8A CN201811246451A CN109013791B CN 109013791 B CN109013791 B CN 109013791B CN 201811246451 A CN201811246451 A CN 201811246451A CN 109013791 B CN109013791 B CN 109013791B
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- pinch roller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
- B21D17/04—Forming single grooves in sheet metal or tubular or hollow articles by rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention relates to a pipe fitting channeling machine and a channeling processing technology of the end part of a pipe fitting. The pipe fitting channeling machine comprises a channeling machining assembly and a pinch roller power component; the rolling groove processing assembly comprises a main shaft, a motor, a knurling wheel, a pressing wheel shaft, a pressing wheel frame and a pressing wheel, wherein the lower end of the main shaft is connected with the power output end of the motor, and the knurling wheel is arranged at the upper end of the main shaft; one side of the knurling wheel is provided with a pinch roller which is connected with a pinch roller frame through a pinch roller shaft, and the pinch roller frame is driven by a pinch roller power component. The invention solves the problems that the existing pipe fitting channeling processing equipment and technology are easy to run pipe (namely, the pipe fitting breaks away from the knurling wheel) when channeling on pipe fittings such as a tee bend elbow, and the pipe fitting end is easy to scratch when processing because the distance fluctuation from the groove to the pipe fitting end is large; the fluctuation of the distance from the groove to the end part of the pipe fitting can be effectively controlled, the processing quality is improved, and the end part of the pipe fitting is prevented from being scratched during processing; the method has the advantages of accurate and controllable pipe groove processing depth, reasonable equipment function layout and the like, and is particularly suitable for the rolling groove processing of the end parts of special-shaped pipe fittings such as elbows and the like.
Description
Technical Field
The invention relates to a device and a process for processing a groove on a metal tubular product, in particular to a pipe fitting channeling machine and a channeling process for the end part of a pipe fitting.
Background
At present, in the laying process of pipelines (such as steel pipes), when the pipeline passage needs to be changed, pipe fittings such as three-way elbows and the like are often used, the pipe fittings need to be connected through a clamp, and the clamp connection needs to be grooved on the end parts of the pipe fittings. Although the prior art of channeling on straight pipes is mature, channeling on pipe fittings such as three-way elbows is not perfect, as shown in fig. 1: the problems generally encountered are that the distance a from the groove of the width B to the end of the pipe is large, and the end of the pipe is easily scratched during processing.
Disclosure of Invention
The invention aims to provide a pipe fitting channeling machine and a channeling processing technology of the pipe fitting end part thereof, which mainly solve the technical problems that when the existing pipe fitting channeling processing equipment and technology are used for channeling on pipe fittings such as a tee bend elbow, the pipe fitting is easy to run out (namely, the pipe fitting is separated from a knurling wheel), the distance fluctuation amount from the channel to the pipe fitting end part is large, the pipe fitting end part is easy to scratch during processing, and the like; the equipment and the process can effectively control the fluctuation of the distance from the groove to the end part of the pipe fitting, improve the processing quality and avoid the end part of the pipe fitting from being scratched during processing; in addition, the method has the advantages of accurate and controllable pipe groove processing depth, reasonable equipment function layout and the like, and is particularly suitable for rolling groove processing of the end parts of special-shaped pipe fittings such as elbows and the like.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a pipe fitting channeling machine comprises a channeling processing assembly and a pinch roller power component; the method is characterized in that: the rolling groove processing assembly comprises a main shaft, a motor, a knurling wheel, a pressing wheel shaft, a pressing wheel frame and a pressing wheel, wherein the lower end of the main shaft is connected with the power output end of the motor, and the knurling wheel is arranged at the upper end of the main shaft; one side of the knurling wheel is provided with a pinch roller which is connected with a pinch roller frame through a pinch roller shaft, and the pinch roller frame is driven by a pinch roller power component.
The pipe fitting channeling machine is characterized in that: the pipe fitting channeling machine also comprises a frame; the frame is provided with an operation platform and a supporting part positioned below the operation platform, and an accommodating space is arranged between the supporting parts below the operation platform; the knurling wheel, the pressing wheel shaft, the pressing wheel frame and the pressing wheel of the rolling groove processing assembly are arranged on an operation platform; a friction disc is also arranged on the operation platform; the friction disk comprises a rotary supporting disk, a bearing seat, a friction disk mounting shaft, a friction disk bearing, a bearing seat fixing piece and a rotary supporting disk fixing piece; the rotary supporting disc is fixed at the upper end of a friction disc mounting shaft through a rotary supporting disc fixing piece, and the friction disc mounting shaft is arranged in the bearing seat in a penetrating way and is provided with a friction disc bearing between the friction disc mounting shaft and the bearing seat; the bearing seat fixes the friction disc on an operation platform of the frame through a bearing seat fixing piece; the upper end surface of the rotary supporting disc is slightly higher than the upper end surface of the operating platform.
The pipe fitting channeling machine is characterized in that: the oil filling port is arranged at the position of the bearing seat, which is positioned on the friction disk bearing, so that the friction disk bearing can be filled with oil according to the requirement to ensure smooth and steady rotation of the friction disk mounting shaft.
The pipe fitting channeling machine is characterized in that: the pipe fitting channeling machine further comprises a touch screen assembly; the touch screen assembly comprises an electric control box with a touch screen, a cantilever, a rotary connecting piece, a rotating shaft, a fixed plate and a fixed plate connecting piece; wherein: one end of the cantilever is connected with an electric control box with a touch screen, the other end of the cantilever is connected with a rotary connecting piece, the rotary connecting piece is connected with a rotating shaft, and two ends of the rotating shaft penetrate out of the rotary connecting piece; the device is also provided with a pair of fixed plates, the fixed plates are connected below the operation platform through fixed plate connecting pieces, a distance is kept between the pair of fixed plates, and the distance ensures that the rotary connecting pieces penetrate between the two fixed plates; the part of the rotating shaft penetrating out of at least two ends of the rotating shaft is provided with at least two combining planes, the corresponding positions of the two fixing plates are provided with positioning holes for the rotating shaft to penetrate through, and the positioning holes are also provided with positioning hole combining planes corresponding to the rotating shaft combining planes; and a rotating hole is further arranged near the positioning holes of the two fixing plates, the rotating hole is communicated with the positioning holes, and the aperture of the rotating hole is larger than the maximum outer diameter of the rotating shaft.
The pipe fitting channeling machine is characterized in that: the two ends of the rotating shaft penetrate out of the two fixing plates to be respectively connected with the rotating shaft baffle piece.
The pipe fitting channeling machine is characterized in that: the pipe fitting channeling machine is also provided with a groove processing depth control device; the groove machining depth control device comprises a magnetic scale and a magnetic head; the magnetic scale is arranged at the upper end of the pressing wheel frame, a pressing wheel frame cover plate is further arranged above the pressing wheel frame, a magnetic head is arranged on the pressing wheel frame cover plate at the position corresponding to the magnetic scale, and the signal output end of the magnetic head is further connected to the PLC.
The pipe fitting channeling machine is characterized in that: the cover plate of the pinch roller frame is further provided with a magnetic grating reader and a reader protective cover.
The pipe fitting channeling machine is characterized in that: the pressing wheel power component is an oil cylinder, and the pipe fitting channeling machine further comprises a hydraulic oil flow and pressure control mechanism consisting of the oil cylinder and a hydraulic component; the cylinder body of the oil cylinder is divided into a first cavity and a second cavity with correspondingly changeable volumes by a piston; the hydraulic assembly comprises an oil pump, a high-pressure filter, a first hydraulic meter, a proportional pressure reducing valve, a proportional flow valve, a second hydraulic meter, a manual overflow valve and an electromagnetic valve which are controlled by PLC connection, wherein the oil pump is connected with the input end of the high-pressure filter through a pipeline; the proportional pressure reducing valve is connected with the input end of the proportional flow valve through a pipeline, the output end of the proportional flow valve is further connected to a first cavity and a second cavity of the oil cylinder respectively through a pipeline provided with an electromagnetic valve, and a second hydraulic gauge is arranged on the pipeline of the electromagnetic valve connected with the second cavity.
The pipe fitting channeling machine is characterized in that: the working steps of the hydraulic oil flow and pressure control mechanism are as follows:
1) Starting an oil pump;
2) The hydraulic oil is sequentially conveyed into a first hydraulic gauge, a proportional pressure reducing valve and a lower cavity of an oil cylinder through the control of an electromagnetic valve through the pressure regulation of a manual overflow valve, and a pinch roller controlled by the oil cylinder is in a retreating state at the moment;
3) When a rolling groove machining instruction is started, hydraulic oil is sequentially conveyed into a first hydraulic gauge, a proportional pressure reducing valve and an upper cavity of an oil cylinder through pressure regulation of a manual overflow valve, the oil cylinder is controlled by an electromagnetic valve to enter the upper cavity of the oil cylinder, and the oil cylinder pushes a pressing wheel to be close to a pipe fitting;
4) When the second hydraulic gauge senses that the hydraulic pressure reaches the preset pressure, namely the pinch roller is contacted with the pipe fitting, the pressure of the proportional pressure reducing valve and the flow of the proportional flow valve are changed through the PLC to perform channeling;
5) When the rolling groove is finished, the pinch roller cannot be controlled to retreat in situ, an operator controls the PLC to control the electromagnetic valve to guide hydraulic oil into the lower cavity of the oil cylinder, and at the moment, the pinch roller controlled by the oil cylinder is in a retreating state and the pipe fitting is loosened.
The processing technology for implementing the channeling on the end part of the pipe by the pipe channeling machine comprises the following steps: placing the pipe on a knurling wheel at the upper end of the main shaft, wherein the end part of the pipe is supported on the baffle; under the condition that the main shaft does not rotate, the pinch roller power component drives the pinch roller frame and the pinch roller to approach the knurling wheel, and the pinch roller forms grooves with certain depth and width on the surface of the pipe fitting at certain distance; and then rolling the pipe fitting subjected to the spot pressing treatment on a machine to obtain the pipe fitting with small fluctuation of the distance from the groove to the end part of the pipe fitting.
By adopting the structure, compared with the prior art, the invention has the following advantages:
1. the invention can obtain the product with smaller variation of the distance from the groove to the end part of the pipe fitting through the structure of the rolling groove processing assembly and the spot pressing process, and simultaneously solves the problem that the original processing process is easy to run the pipe (namely, the pipe fitting is separated from the knurling wheel).
2. The invention accurately controls the depth of the groove of each pipe fitting by adopting a magnetic grid ruler technology.
3. The hydraulic control of the oil cylinder adopts the proportional valve to accurately control the flow and the pressure of the hydraulic oil, the flow is not influenced by the load, the feeding is stable, and the quality of the rolling groove product is improved.
4. The invention provides the device for preventing the end part of the pipe from being scratched, and the hanging part of the pipe can be supported by the rotary platform when the large-caliber pipe is processed, so that the pipe is prevented from being scratched, and the operating table top is also protected.
5. The spindle adopts variable frequency speed regulation, so that the processing efficiency is improved.
6. The touch screen assembly can be rotatably retracted and placed in the machine frame in a reverse mode in the machine transportation process, space is saved, and the touch screen is protected.
Drawings
Fig. 1 is a schematic view of the structure of a pipe end rolling groove.
Fig. 2 is a schematic front view of the pipe channeling machine of the present invention.
Fig. 3 is a schematic diagram of the operation of the channeling assembly of the pipe channeling machine of the present invention.
Fig. 4 is a schematic view of the structure of the channeling assembly of the pipe channeling machine of the present invention.
Fig. 5 is a schematic view of the pipe fitting structure after the point pressing operation of the rolling groove processing technology of the invention.
Fig. 6 is a schematic view of the structure of the friction disc in the pipe channeling machine of the present invention.
Fig. 7 is a schematic view of the friction disk-fit channeling assembly of the pipe channeling machine of the present invention.
Fig. 8 is a schematic diagram of the front structure of a touch screen rotary retraction mechanism in a pipe channeling machine according to the present invention.
Fig. 9 is a right side view of fig. 8.
Fig. 10 is a schematic structural view (i.e., top view of fig. 4) of a groove processing depth control device of a pipe channeling machine according to the present invention.
Fig. 11 is a schematic structural diagram of a hydraulic oil flow and pressure control mechanism of the pipe channeling machine of the present invention.
Fig. 12 is a schematic structural view of a cylinder of the pipe channeling machine of the present invention.
Detailed Description
The invention discloses a pipe fitting channeling machine. Fig. 2 is a schematic front view of a pipe channeling machine according to a preferred embodiment of the present invention. As shown in the figure: the device comprises a rolling groove machining assembly 1, a hydraulic assembly 2, a frame 3, an oil cylinder 4, a touch screen assembly 5 and a friction disc 6. The frame 3 has an operation platform and a support portion below the operation platform, and an accommodation space is provided between the support portions below the operation platform. Wherein the friction disk 6 is mainly arranged on the operation platform; the touch screen assembly 5 is arranged on the operation platform when in use, and can be stored in the accommodating space after being used; the oil cylinder 4 can be arranged on an operation platform; the hydraulic assembly 4 is mainly arranged in the accommodating space; the rolling groove processing part (such as a pressing wheel, a pressing wheel shaft, a pressing wheel bracket, a pressing wheel bearing, a knurling wheel and a baffle plate) of the rolling groove processing assembly 1 is mainly arranged on an operation platform, and the power part (such as a motor, a main shaft and a main shaft bearing) is mainly arranged in the accommodating space. Therefore, the functional assembly of the invention has reasonable layout, and some components (such as the touch screen assembly) are easy to be stored and protected under the condition of not using, and the electric components are mainly arranged in the accommodating space, and the accommodating space can adopt a closed or semi-closed structure, thereby being a better protection for the electric components.
The various functional components and their innovative features of the present invention are described in the following further reference to the accompanying drawings.
Please refer to fig. 3 and 4, which are schematic structural diagrams of a channeling assembly 1 of the pipe channeling machine of the present invention. As shown in the figure: the device consists of a main shaft 11, a motor 12, a main shaft bearing 13, a baffle 14, a knurling wheel 15, a pinch roller shaft 16, a pinch roller bearing 17, a pinch roller frame 18 and a pinch roller 19, and can further realize the function of processing the rolling groove at the end part of the pipe fitting by combining with an oil cylinder 4. Wherein: the main shaft 11 is generally vertically arranged, and the lower end of the main shaft 11 is connected with the power output end of the motor 12 and can output rotary power through the motor 12; the upper end of the main shaft 11 is fixedly connected with a baffle plate 14, and the baffle plate 14 mainly has the function of supporting the end part of a pipe fitting W of a rolling groove to be processed; the baffle 14 is further provided with a knurling wheel 15, and when the spindle 11 is driven to rotate by the motor 12, the baffle 14 and the knurling wheel 15 are synchronously rotated. In addition, a shaft sleeve is arranged outside the main shaft 11, and a main shaft bearing 13 is arranged between the main shaft 11 and the shaft sleeve to ensure stable rotation of the main shaft 11 and reduce noise. In a specific arrangement, the motor 12, spindle bearing 13, sleeve and spindle 1 are all disposed in a receiving space below the operating platform of the frame 3, while the baffle 14 and knurling wheel 15 are disposed above the operating platform. The side above the operating platform, which is located at the baffle 14 and the knurling wheel 15, is provided with a pinch roller 19, the pinch roller 19 is connected to a pinch roller shaft 16 through a pinch roller bearing 17, the pinch roller shaft 16 is further connected to a pinch roller frame 18, and the pinch roller frame 18 is driven by the oil cylinder 4 connected with the pinch roller frame 18 so that the pinch roller 19 is close to or far from the knurling wheel 15.
As another embodiment of the present invention, the cylinder 4 may be replaced with other pinch roller power components (e.g., a cylinder).
As an alternative embodiment of the invention, the baffle 14 may be replaced by a support structure integrally provided on the knurling wheel 15, i.e. the knurling wheel itself has a support for the end of the workpiece tube.
The invention mainly realizes the rolling groove processing technology of the pipe fitting end part through the structure, the rolling groove processing technology is called as a point pressing technology, and the concrete operation steps are as follows: placing the pipe W on the knurling wheel 15 at the upper end of the main shaft 11, at which time the end of the pipe W is supported on the baffle 14; as shown in fig. 5: under the condition that the main shaft 11 does not rotate, the pressing wheel frame 18 and the pressing wheel 19 are driven by the oil cylinder 4 to approach the knurling wheel 15, and grooves with certain depth H and width B are formed on the surface of the pipe fitting W by the pressing wheel 19 at a certain distance D; then rolling the pipe W subjected to the spot pressing treatment on a machine to obtain a pipe with smaller fluctuation of the distance A from the groove to the end of the pipe. Meanwhile, the problem that the original processing technology is easy to run out (namely, the pipe fitting is separated from the knurling wheel) is solved.
The concrete operation mode of the rolling groove after spot pressing mainly comprises the steps that the oil cylinder 4 controls the pressing wheel 19 to be close to the knurling wheel 15, at the moment, the motor 12 is started and drives the main shaft 11 to rotate, the knurling wheel 15 and the pressing wheel 19 close to the knurling wheel jointly clamp the end part of the pipe fitting 4, and then the rolling groove is processed at the groove position after spot pressing positioning, so that the pipe fitting with smaller fluctuation of the distance A from the groove to the end part of the pipe fitting is obtained.
The structure and the processing technique are particularly suitable for processing the groove near the end part of the special-shaped pipe fitting, and meanwhile, the fluctuation of the distance from the groove to the end part of the pipe fitting can be effectively controlled, so that the processing quality is improved. However, in the actual machining process, it was found that when a large-diameter pipe is machined, the end of the pipe cannot be supported by the baffle 14 of the rotary spindle 11, and the end of the pipe which is not supported is likely to collide with the machine panel, which may cause the end face to be scratched.
In order to solve the problem of end galling, the present invention further provides a pipe end galling prevention device of a pipe rolling machine, namely, a friction disk 6 shown in fig. 1. The baffle plate 14 of the rolling groove machining assembly 1 further supports the other part of the end part of the pipe fitting W through the friction disc 6 under the condition that the baffle plate 14 supports the other part of the end part of the pipe fitting W, so that the end part of the pipe fitting W is prevented from being scratched within a protection range, the end part of the pipe fitting W is ensured to be in a horizontal state during machining, and the rolling groove machining quality is improved.
Referring further to fig. 6 in conjunction with fig. 1, the friction disk 6 includes a rotary support disk 61, a bearing housing 62, a friction disk mounting shaft 63, a friction disk bearing 64, a bearing housing mount 65, a rotary support disk mount 66, and an oil filler port 67. Wherein: the rotary support disc 61 is fixed to the upper end of a friction disc mounting shaft 63 by a rotary support disc fixing member 66, the friction disc mounting shaft 63 is penetrated into a bearing housing 62 with a friction disc bearing 64 interposed therebetween; the bearing block 62 fixes the friction disk 6 to the operating platform of the frame 3 via a bearing block fixing member 65. After installation, the upper end face of the rotary supporting disc is slightly higher than the upper end face of the operating platform. In use, as shown in fig. 7: when machining large diameter pipe, the pipe W is supported and protected by the rotary support disc 61 and the baffle 14 of the channeling assembly 1 together and the pipe W ends are secured in a horizontal machining position. In addition, an oil filling port 67 is provided on the bearing housing 62 at a position of the friction disk bearing 64, and the friction disk bearing 64 may be filled with oil as needed to ensure smooth and steady rotation of the friction disk mounting shaft 63. The upper end face of the rotary supporting disc is slightly higher than the upper end face of the operating platform, so that the operating platform is not easy to be damaged by the end part of the pipe fitting.
In the pipe fitting channeling machine, parameter setting of channeling and a control center of the whole electric component are mainly arranged on a touch screen, namely, the touch screen is the electric control box (comprising a PLC). As shown in fig. 1, the touch screen assembly 5 is disposed on an operating platform in use. In view of protection of the electrical control box and reduction of the occupied space on the operation platform, the touch screen assembly 5 is preferably housed in the housing space after use. Therefore, the invention further designs a touch screen rotating retracting mechanism of the pipe fitting channeling machine. As shown in fig. 8 and 9: it includes an electrical control box 51 with a touch screen, a cantilever 52, a rotary connector 53, a rotary shaft 54, a fixed plate 55, a rotary shaft stopper 56, and a fixed plate connector 57. Wherein: the cantilever 52 can be formed by connecting a plurality of pipe fittings and corner parts, one end of the cantilever 52 is connected with an electric control box 51 with a touch screen, the other end is connected with a rotary connecting piece 53, the rotary connecting piece 53 is connected with a rotary shaft 54, and two ends of the rotary shaft 54 penetrate out of the rotary connecting piece 53; a pair of fixing plates 55 are further provided, the fixing plates 55 are connected below the operation platform through fixing plate connecting members 57, and a distance is maintained between the pair of fixing plates 55, which distance ensures that the rotary connecting members 53 penetrate between the two fixing plates 55; the shaft 54 has at least two coupling planes at least at the portions penetrating from both ends thereof, and positioning holes for the shaft 54 to pass through are provided at corresponding positions of the two fixing plates 55, and the positioning holes also have positioning hole coupling planes corresponding to the coupling planes of the shaft 54, that is, the shaft coupling planes can be coupled with the positioning hole coupling planes to position at least two supporting positions to position the angle of the cantilever 52. A rotation hole is further provided near the positioning hole of the two fixing plates 55, the rotation hole is communicated with the positioning hole, and the aperture of the rotation hole must ensure that the rotation shaft 54 can freely rotate after moving to the rotation hole. Such as: the shaft 54 is a member with two flat sides of a cylinder, the positioning holes of the two fixing plates 55 are square holes or square holes (such as capsule-shaped holes) corresponding to the space between the flat sides of the cylinder, and the rotating holes communicated with the positioning holes are round holes with a diameter larger than that of the cylinder. When the pipe channeling machine is in use, the cantilever arm 52 is positioned in a position supported above the operating platform. When the touch screen assembly 5 is required to be stored after use, the rotating shaft 54 is rotated into the rotating hole, then the cantilever 52 is rotated to a downward angle, and then the rotating shaft 54 is moved to the positioning hole, so that the cantilever 52 is stably positioned downwards, and at the moment, the electric control box 51 with the touch screen connected with one end of the cantilever 52 is positioned in the accommodating space below the operation platform. In order to ensure that the shaft 54 does not axially move, shaft stoppers 56 are respectively connected to positions of the shaft 54 at which both ends thereof protrude from the two fixing plates 55. It should be noted that, the combination positions of the cantilever 52, the rotary connector 53, the rotary shaft 54 and the fixing plate 55 of the touch screen assembly 5 may be disposed at the edge of the operation platform, and if the combination positions are disposed at the middle position of the operation platform, a notch for the cantilever 52 to pass through needs to be disposed on the operation platform. In the final preferred embodiment, after the electrical control box 51 with touch screen is received in the receiving space and positioned, the lower end face (turned upwards in this case) of the swivel connection 53 is flush with the operating platform plane and covers the gap.
In addition, the main shaft 11 of the invention can adopt a variable-frequency speed-regulating motor to continuously regulate the rotating speed from 8 to 30, and a user can adjust the rotating speed according to the actual condition of the pipe fitting, thereby improving the quality and the efficiency of the rolling groove.
Considering the existing pipe fitting channeling machine, the stroke limit nut position of the oil cylinder is manually and slowly adjusted in the process of adjusting the depth of the groove, the adjustment is troublesome, and the scrapping is easy to occur. The invention further designs a groove machining depth control device of the pipe fitting channeling machine. The groove machining depth control device mainly adopts a structure that a magnetic grating ruler is matched with a PLC in an electrical control box. The working principle of the magnetic grating ruler is as follows: the magnetic field is scanned non-contact and the analog measurement is converted into an absolute or incremental output signal. The magnetic grating ruler is divided into a magnetic ruler and a magnetic head, equidistant NS signals (N pole and S pole are changed mutually) are recorded on the magnetic ruler, the magnetic head reads the signals on the magnetic ruler, and the signals are subdivided into AB signals and are output to the PLC after being processed. The magnetized material is magnetized equidistantly, and the magnetic head is used for reading the magnetized strip along with displacement to convert the magnetized strip into an electric signal, so that the displacement can be measured. As shown in fig. 10: in the invention, the magnetic scale 71 is arranged at the upper end of the pinch roller frame 18, a pinch roller frame cover plate 181 is further arranged above the pinch roller frame 18, a magnetic head is arranged on the pinch roller frame cover plate 181 at a position corresponding to the magnetic scale 71, and the signal output end of the magnetic head is further connected to the PLC. The magnetic grating reader 72 and the reader shield 73 are further arranged on the pinch roller frame cover plate 181. When the device is used, the pipe fitting rolling groove depth value is input into the PLC, the PLC controls the oil cylinder 4 to push the pressing wheel frame 18, when the stroke of the oil cylinder 4 (the pressing wheel frame 18) reaches a set value, the magnetic head reads a signal on the magnetic scale 71 and feeds back the signal to the PLC, the PLC sends an instruction to enable the oil cylinder 4 to stop moving, and then the pipe fitting rolling groove depth is the set value (for example, 2.5 mm). Of course, the user can also read the roll groove depth value at any time through the magnetic grid reader 72 on the pinch roller frame cover plate 181. Through the structure, the invention conveniently and accurately realizes the setting of the rolling groove depth and the effective control of the groove processing depth. Since the PLC can be provided in the electrical control box 51 with the touch screen, the real-time processing depth and processing condition of the groove can also be fed back through the touch screen.
Referring to fig. 11, the present invention further designs a hydraulic oil flow and pressure control mechanism of a pipe channeling machine. The hydraulic oil cylinder comprises an oil cylinder 4 and a hydraulic assembly 2, wherein the cylinder body of the oil cylinder 4 is divided into a first cavity and a second cavity with correspondingly changeable volumes by a piston. As shown in fig. 11: the hydraulic assembly 2 includes an oil pump 21, a high pressure filter 22, a first hydraulic pressure gauge 23, a proportional pressure reducing valve 24, a proportional flow valve 25, a second hydraulic pressure gauge 26, a cooler 27, a manual relief valve 28, and a solenoid valve 29. Wherein: the oil pump 21 is connected with the input end of the high-pressure filter 22 through a pipeline, the output end of the high-pressure filter 22 is connected with the input end of the manual overflow valve 28 through a pipeline, the output end of the manual overflow valve 28 is connected with the input end of the proportional pressure reducing valve 24 through a pipeline, and a first hydraulic gauge 23 is arranged on the pipeline between the manual overflow valve 28 and the proportional pressure reducing valve 24; the proportional pressure reducing valve 24 is connected to an input end of the proportional flow valve 25 through a pipeline, an output end of the proportional flow valve 25 is further connected to a first cavity (such as an upper cavity 41) and a second cavity (such as a lower cavity 42) of the oil cylinder 4 through a pipeline provided with an electromagnetic valve 29, and a second hydraulic gauge 26 is arranged on the pipeline of the electromagnetic valve 29 connected to the second cavity (such as the lower cavity 42). The return port of the manual overflow valve 28 is connected to the cooler 27 by a pipe.
The working steps of the structure are as follows:
1. the oil pump 21 is started.
2. The hydraulic oil is sequentially input into the first hydraulic gauge 23, the proportional pressure reducing valve 24 and the lower cavity 42 of the oil cylinder 4 through the pressure regulation of the manual overflow valve 28, and then is controlled to enter the lower cavity 42 of the oil cylinder 4 through the electromagnetic valve 29, and the pinch roller 19 controlled by the oil cylinder 4 is in a retreating state.
3. When a rolling groove machining instruction is started, hydraulic oil is sequentially input into the first hydraulic gauge 23, the proportional pressure reducing valve 24 and the upper cavity 41 of the oil cylinder 4 through pressure regulation of the manual overflow valve 28, the oil cylinder 4 pushes the pressing wheel 19 to be close to the pipe W through control of the electromagnetic valve 29.
4. When the second hydraulic gauge 26 senses that the hydraulic pressure reaches a preset pressure (i.e., the pinch roller 19 has contacted the pipe W), the pressure of the proportional pressure reducing valve 24 and the flow of the proportional flow valve 25 are changed by the PLC to perform channeling.
5. When the rolling groove is finished (that is, the magnetic grating ruler structure informs the PLC that the preset rolling groove depth is reached), the pinch roller 19 cannot be controlled to retreat in situ, an operator (or a touch screen clicks manually) is required to control the PLC to control the electromagnetic valve 29 to guide hydraulic oil into the lower cavity 42 of the oil cylinder 4, and at the moment, the pinch roller 19 controlled by the oil cylinder 4 is in a retreating state and the pipe fitting W is loosened.
As described above, the oil cylinder of the present invention has the following operation: the empty load cylinder fast forwards, the load cylinder slowly forwards, the rolling groove is finished, the cylinder stops at the original position and does not return, and the cylinder is manually fast returned. The empty load cylinder fast-forwards, the purpose is to improve the production efficiency, the load cylinder slowly forwards, and the purpose is to improve the rolling groove quality. When the pinch roller 19 contacts the pipe W, the pressure to preset value sensor sends a signal to the PLC, which sends a new pressure flow command to the proportional flow valve 8, the proportional pressure reducing valve, and the cylinder operate stably with the set pressure and flow.
The hydraulic oil flow and pressure control mechanism of the pipe fitting channeling machine adopts a proportional flow valve and a proportional pressure reducing valve, namely an electrohydraulic proportional valve. The advantages are that: when the equipment mechanism requires to regulate or continuously control the pressure and flow parameters of the hydraulic system in the working process (for example, the workbench is required to realize feeding according to the slow, fast and slow continuous changing speed in the working feeding process, or a certain optimal control curve is simulated according to a certain precision to realize pressure control), the common hydraulic valve cannot realize the pressure control. The hydraulic system can be controlled by the electro-hydraulic proportional valve.
Referring to fig. 12, in order to cooperate with the hydraulic oil flow and pressure control mechanism of the pipe channeling machine of the present invention, the oil cylinder 4 of the present invention includes a cylinder 43, the upper and lower ends of the cylinder 43 are respectively sealed by an upper end cover 45 and a base 46, a piston 44 is disposed in the cylinder 43 to divide the interior of the cylinder into an upper cavity 41 and a lower cavity 42, and a piston rod of the piston 44 penetrates out of the base to connect with the pressure frame 18. The upper end cap 45 has an upper end cap passage connected to the upper hydraulic pipe 47, and the upper hydraulic pipe 47 communicates with the inside of the upper chamber 41 through the upper end cap passage; the base 46 has a base passage connected to a lower hydraulic tube 48, and the lower hydraulic tube 48 communicates with the lower chamber 42 through the base passage.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes using the descriptions and drawings of the present invention or directly or indirectly applied to other related technical fields are included in the scope of the invention.
Claims (9)
1. A processing technology for implementing channeling on the end part of a pipe fitting through a pipe fitting channeling machine is characterized in that:
the pipe fitting channeling machine comprises a channeling machining assembly and a pinch roller power component; the rolling groove processing assembly comprises a main shaft, a motor, a knurling wheel, a pressing wheel shaft, a pressing wheel frame and a pressing wheel, wherein the lower end of the main shaft is connected with the power output end of the motor, and the knurling wheel is arranged at the upper end of the main shaft; a pinch roller is arranged at one side of the knurling wheel and connected to a pinch roller frame through a pinch roller shaft, and the pinch roller frame is driven by a pinch roller power component;
the process steps are as follows:
placing the pipe on a knurling wheel at the upper end of the main shaft, wherein the end part of the pipe is supported on the baffle; under the condition that the main shaft does not rotate, the pinch roller power component drives the pinch roller frame and the pinch roller to approach the knurling wheel, and the pinch roller forms grooves with certain depth and width on the surface of the pipe fitting at certain distance; and then rolling the pipe fitting subjected to the spot pressing treatment on a machine to obtain the pipe fitting with small fluctuation of the distance from the groove to the end part of the pipe fitting.
2. The process for channeling an end of a pipe by a pipe channeling machine of claim 1, wherein: the pipe fitting channeling machine also comprises a frame; the frame is provided with an operation platform and a supporting part positioned below the operation platform, and an accommodating space is arranged between the supporting parts below the operation platform; the knurling wheel, the pressing wheel shaft, the pressing wheel frame and the pressing wheel of the rolling groove processing assembly are arranged on an operation platform; a friction disc is also arranged on the operation platform; the friction disk comprises a rotary supporting disk, a bearing seat, a friction disk mounting shaft, a friction disk bearing, a bearing seat fixing piece and a rotary supporting disk fixing piece; the rotary supporting disc is fixed at the upper end of a friction disc mounting shaft through a rotary supporting disc fixing piece, and the friction disc mounting shaft is arranged in the bearing seat in a penetrating way and is provided with a friction disc bearing between the friction disc mounting shaft and the bearing seat; the bearing seat fixes the friction disc on an operation platform of the frame through a bearing seat fixing piece; the upper end surface of the rotary supporting disc is slightly higher than the upper end surface of the operating platform.
3. The process for channeling an end of a pipe by a pipe channeling machine of claim 2, wherein: the oil filling port is arranged at the position of the bearing seat, which is positioned on the friction disk bearing, so that the friction disk bearing can be filled with oil according to the requirement to ensure smooth and steady rotation of the friction disk mounting shaft.
4. The process for channeling an end of a pipe by a pipe channeling machine of claim 2, wherein: the pipe fitting channeling machine further comprises a touch screen assembly; the touch screen assembly comprises an electric control box with a touch screen, a cantilever, a rotary connecting piece, a rotating shaft, a fixed plate and a fixed plate connecting piece; wherein: one end of the cantilever is connected with an electric control box with a touch screen, the other end of the cantilever is connected with a rotary connecting piece, the rotary connecting piece is connected with a rotating shaft, and two ends of the rotating shaft penetrate out of the rotary connecting piece; the device is also provided with a pair of fixed plates, the fixed plates are connected below the operation platform through fixed plate connecting pieces, a distance is kept between the pair of fixed plates, and the distance ensures that the rotary connecting pieces penetrate between the two fixed plates; the part of the rotating shaft penetrating out of at least two ends of the rotating shaft is provided with at least two combining planes, the corresponding positions of the two fixing plates are provided with positioning holes for the rotating shaft to penetrate through, and the positioning holes are also provided with positioning hole combining planes corresponding to the rotating shaft combining planes; and a rotating hole is further arranged near the positioning holes of the two fixing plates, the rotating hole is communicated with the positioning holes, and the aperture of the rotating hole is larger than the maximum outer diameter of the rotating shaft.
5. The process for channeling an end of a pipe by a pipe channeling machine of claim 4, wherein: the two ends of the rotating shaft penetrate out of the two fixing plates to be respectively connected with the rotating shaft baffle piece.
6. The process for channeling an end of a pipe by a pipe channeling machine of claim 1, wherein: the pipe fitting channeling machine is also provided with a groove processing depth control device; the groove machining depth control device comprises a magnetic scale and a magnetic head; the magnetic scale is arranged at the upper end of the pressing wheel frame, a pressing wheel frame cover plate is further arranged above the pressing wheel frame, a magnetic head is arranged on the pressing wheel frame cover plate at the position corresponding to the magnetic scale, and the signal output end of the magnetic head is further connected to the PLC.
7. The process for channeling an end of a pipe by a pipe channeling machine of claim 6, wherein: the cover plate of the pinch roller frame is further provided with a magnetic grating reader and a reader protective cover.
8. The process for channeling an end of a pipe by a pipe channeling machine of claim 2, wherein: the pressing wheel power component is an oil cylinder, and the pipe fitting channeling machine further comprises a hydraulic oil flow and pressure control mechanism consisting of the oil cylinder and a hydraulic component; the cylinder body of the oil cylinder is divided into a first cavity and a second cavity with correspondingly changeable volumes by a piston; the hydraulic assembly comprises an oil pump, a high-pressure filter, a first hydraulic meter, a proportional pressure reducing valve, a proportional flow valve, a second hydraulic meter, a manual overflow valve and an electromagnetic valve which are controlled by PLC connection, wherein the oil pump is connected with the input end of the high-pressure filter through a pipeline; the proportional pressure reducing valve is connected with the input end of the proportional flow valve through a pipeline, the output end of the proportional flow valve is further connected to a first cavity and a second cavity of the oil cylinder respectively through a pipeline provided with an electromagnetic valve, and a second hydraulic gauge is arranged on the pipeline of the electromagnetic valve connected with the second cavity.
9. The process for channeling an end of a pipe by a pipe channeling machine of claim 8, wherein: the working steps of the hydraulic oil flow and pressure control mechanism are as follows:
1) Starting an oil pump;
2) The hydraulic oil is sequentially conveyed into a first hydraulic gauge, a proportional pressure reducing valve and a lower cavity of an oil cylinder through the control of an electromagnetic valve through the pressure regulation of a manual overflow valve, and a pinch roller controlled by the oil cylinder is in a retreating state at the moment;
3) When a rolling groove machining instruction is started, hydraulic oil is sequentially conveyed into a first hydraulic gauge, a proportional pressure reducing valve and an upper cavity of an oil cylinder through pressure regulation of a manual overflow valve, the oil cylinder is controlled by an electromagnetic valve to enter the upper cavity of the oil cylinder, and the oil cylinder pushes a pressing wheel to be close to a pipe fitting;
4) When the second hydraulic gauge senses that the hydraulic pressure reaches the preset pressure, namely the pinch roller is contacted with the pipe fitting, the pressure of the proportional pressure reducing valve and the flow of the proportional flow valve are changed through the PLC to perform channeling;
5) When the rolling groove is finished, the pinch roller cannot be controlled to retreat in situ, an operator controls the PLC to control the electromagnetic valve to guide hydraulic oil into the lower cavity of the oil cylinder, and at the moment, the pinch roller controlled by the oil cylinder is in a retreating state and the pipe fitting is loosened.
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| CN201811246451.8A CN109013791B (en) | 2018-10-25 | 2018-10-25 | Pipe fitting channeling machine and channeling process of pipe fitting end part thereof |
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| CN201811246451.8A CN109013791B (en) | 2018-10-25 | 2018-10-25 | Pipe fitting channeling machine and channeling process of pipe fitting end part thereof |
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| CN109013791B true CN109013791B (en) | 2023-09-08 |
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| RU95107586A (en) * | 1995-05-12 | 1997-01-27 | Акционерное общество открытого типа "Спецремэнерго" | Knurling head |
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| CN109013791A (en) | 2018-12-18 |
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