CN113231872B - Machining equipment for metal tubular workpiece and control method thereof - Google Patents

Machining equipment for metal tubular workpiece and control method thereof Download PDF

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Publication number
CN113231872B
CN113231872B CN202110539132.1A CN202110539132A CN113231872B CN 113231872 B CN113231872 B CN 113231872B CN 202110539132 A CN202110539132 A CN 202110539132A CN 113231872 B CN113231872 B CN 113231872B
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oil
metal tubular
tubular workpiece
port
reversing valve
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CN113231872A (en
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不公告发明人
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Fuqing Xieyi Machinery Co ltd
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Fuqing Xieyi Machinery Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q7/00—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06—Work-clamping means
    • B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
    • B23Q3/064—Work-clamping means adapted for holding workpieces having a special form or being made from a special material for holding elongated workpieces, e.g. pipes, bars or profiles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0846—Electrical details
    • F15B13/085—Electrical controllers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0846—Electrical details
    • F15B13/086—Sensing means, e.g. pressure sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
    • F15B2211/31588—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having a single pressure source and multiple output members
    • 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
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Jigs For Machine Tools (AREA)

Abstract

The invention belongs to the technical field of processing equipment, and particularly relates to processing equipment for a metal tubular workpiece and a control method of the processing equipment. The apparatus includes a machine tool; the cutter arranging device is arranged on one side of a processing table of the machine tool; the clamping device is arranged on the other side of the processing table of the machine tool; the moving device is used for driving the clamping device to approach or separate from the cutter row on the cutter row device along the transverse and/or longitudinal direction; the automatic feeding device is used for conveying the tubular metal workpiece to be processed to the clamping device and clamping the tubular metal workpiece by the clamping device; and the automatic blanking device is arranged on the same side as the automatic feeding device, and is used for separating the metal tubular workpiece from the clamping device and sending the metal tubular workpiece into the charging box after the clamping device loosens the processed metal tubular workpiece. The automatic feeding and discharging device has the advantages that the metal tubular workpiece is fed and discharged in an automatic mode, labor cost is reduced, feeding and discharging efficiency is improved, and machining efficiency of the metal tubular workpiece is improved.

Description

Machining equipment for metal tubular workpiece and control method thereof
Technical Field
The invention belongs to the technical field of processing equipment, and particularly relates to processing equipment for a metal tubular workpiece and a control method of the processing equipment.
Background
With the deep popularization of automation and semi-automation in various economic industries, automatic feeding and discharging becomes an indispensable link on a production and manufacturing line. However, due to the particularity of the workpiece, the existing equipment for processing the metal tubular workpiece does not have an automatic loading and unloading function, and therefore improvement is needed.
Disclosure of Invention
The invention aims to solve the technical problems, and provides a processing device of a metal tubular workpiece and a control method thereof.
The purpose of the invention is realized by the following steps: a processing equipment of metal tubular workpiece is characterized in that: comprises that
A machine tool having a machining table at an upper end thereof;
the tool arranging device is arranged on one side of a processing table of the machine tool and is provided with a plurality of groups of tools for processing metal tubular workpieces;
the clamping device is arranged on the other side of the processing table of the machine tool, is opposite to the cutter arranging device and is used for clamping the metal tubular workpiece and driving the metal tubular workpiece to rotate;
the moving device is used for driving the clamping device to approach or separate from the cutter row on the cutter row device along the transverse and/or longitudinal direction;
the automatic feeding device is used for conveying the tubular metal workpiece to be processed to the clamping device and clamping the tubular metal workpiece by the clamping device; the automatic feeding device comprises a material receiving part, is arranged on the processing table, is positioned at the same side of the tool arrangement device and is used for bearing the metal tubular workpiece; the feeding conveying component is used for conveying a plurality of metal tubular workpieces to be processed to the receiving component in sequence; the feeding pushing component pushes the metal tubular workpiece on the receiving component to the clamping device and the clamping device automatically clamps the metal tubular workpiece;
the automatic blanking device is arranged on the same side as the automatic feeding device and is used for separating the metal tubular workpiece from the clamping device and sending the metal tubular workpiece into the charging box after the clamping device loosens the processed metal tubular workpiece; the automatic blanking device comprises a blanking clamping part, and after the metal tubular workpiece on the clamping device is conveyed to the blanking clamping part by the moving device, the metal tubular workpiece is transferred to the blanking clamping part; and the blanking conveying component is arranged right below the blanking clamping component and is used for bearing the metal tubular workpiece falling from the blanking clamping component and sending the metal tubular workpiece into the charging box.
The invention is further configured to: the feeding conveying component comprises a feeding groove which is formed by enclosing a cover plate, a bottom plate and two side plates, the feeding groove is obliquely arranged, the high end of the feeding groove is a material inlet end, the low end of the feeding groove is a material outlet end, the material outlet end is close to the material receiving component, and a notch which is used for a metal tubular workpiece to slide in and penetrates through the feeding groove from left to right is formed in one side end of the material receiving component, which is right opposite to the feeding groove.
The invention is further configured to: the feeding pushing component comprises a pushing block which is arranged close to the right end face of the receiving component; the driving device is used for driving the push block to transversely reciprocate left and right so as to enable the push block to enter the material receiving component and then push the metal tubular workpiece to approach the clamping device or reset the push block; and the adjusting device is arranged on the push block and used for clamping and adjusting the position of the metal tubular workpiece to enable the central axis of the metal tubular workpiece to be aligned with the center of the clamping device.
The invention is further configured to: the driving device comprises a first hydraulic cylinder, an oil groove, a first three-position four-way reversing valve and an oil pump, wherein an oil inlet port a1 and an oil inlet port a2 are respectively arranged on a rodless cavity and a rod cavity of the first hydraulic cylinder, the first three-position four-way reversing valve is provided with an oil inlet P1, an oil return port T1, a working oil port A1 and a working oil port B1, the oil inlet port a1 is connected with the working oil port A1, the oil inlet port a2 is connected with the working oil port B1, an input port of the oil pump is connected with the oil groove, an output port of the oil pump is connected with the oil inlet P1 through an oil pipe, and the oil return port T1 is connected to the oil groove through an oil pipe;
the first three-position four-way reversing valve has three working states; when the oil inlet is in a left position, the oil inlet P1 is communicated with a working oil port A1, and the oil return port T1 is communicated with a working oil port B1; when the oil inlet is positioned at the right position, the oil inlet P1 is communicated with the working oil port B1, and the oil return port T1 is communicated with the working oil port A1; when the oil port is positioned at the middle position, the oil ports are not communicated with each other;
the extension end of a piston rod on the first hydraulic cylinder is arranged on the push block, the driving device further comprises a controller, and the push block pushes a metal tubular workpiece on the material receiving component to the clamping device or resets the push block by controlling the running states of the first three-position four-way reversing valve and the oil pump.
The invention is further configured to: one end face, close to the metal tubular workpiece, of the push block is provided with a sliding groove which is arranged along the vertical direction, the adjusting device comprises two adjusting blocks, two adjusting blocks are arranged on the sliding groove in a sliding mode, and one end faces, back to each other, of the two adjusting blocks are arc-shaped clamping faces; the power part is used for driving the two adjusting blocks to move oppositely or reversely; after the push block is close to the metal tubular workpiece and the two adjusting blocks are embedded into the metal tubular workpiece, the two adjusting blocks move back to adjust and clamp the metal tubular workpiece; after the metal tubular workpiece is clamped by the clamping device, the two adjusting blocks move oppositely to loosen the metal tubular workpiece.
The invention is further configured to: the power part comprises a cylinder body, a piston ring, a piston cylinder, a sealing cylinder and a sealing cover; the cylinder body is vertically arranged, the upper end and the lower end of the cylinder body are provided with mounting ports communicated with the inner cavity of the cylinder body, the sealing covers are of annular structures, and the two sealing covers respectively cover the two mounting ports; the outer diameter of the sealing cylinder is smaller than the inner diameter of the cylinder body, the sealing cylinder is fixed in the cylinder body through a connecting rib circumferentially arranged in the middle of the outer wall, the cylinder body and the sealing cylinder are coaxially arranged, two piston rings are respectively sleeved on the upper side and the lower side of the sealing cylinder, the inner wall and the outer wall of the piston ring are respectively arranged in a sliding and sealing manner with the inner wall of the cylinder body and the outer wall of the sealing cylinder, two piston cylinders are respectively sleeved on the upper end and the lower end of the sealing cylinder in a sliding manner, one end of the piston cylinder positioned in the cylinder body is fixedly connected with the piston ring, one end of the piston cylinder extending out of the sealing cylinder and the cylinder body is fixedly connected with the adjusting block, the cylinder body is further provided with an oil inlet port b1, an oil inlet port b2 and an oil inlet port b3, and the oil inlet port b1 and the oil inlet port b2 are respectively communicated with two cavities formed by the sealing cover, the piston cylinder body, the piston ring and the cylinder body, the oil inlet port b3 is communicated with a cavity formed by enclosing the two piston rings, the sealing cylinder and the cylinder body;
the power part further comprises a second three-position four-way reversing valve, the structure of the second three-position four-way reversing valve is the same as that of the first three-position four-way reversing valve, the second three-position four-way reversing valve is provided with an oil inlet P2, an oil return port T2, a working oil port A2 and a working oil port B2, an oil inlet port B1 and an oil inlet port B2 are connected with the working oil port A2, an oil inlet port B3 is connected with the working oil port B2, an oil inlet P2 is connected with an output port of an oil pump, and an oil return port T2 is connected with the oil groove.
The invention is further configured to: the automatic feeding device also comprises a buffer device which is arranged in a feeding groove on the feeding conveying component and used for limiting the metal tubular workpieces in the feeding groove to slide outwards at the same time, and one metal tubular workpiece close to the material receiving component in the feeding groove slides into the material receiving component within one processing time;
the buffer device comprises a second hydraulic cylinder, a third three-position four-way reversing valve, a first two-position three-way reversing valve and a second two-position three-way reversing valve; the second hydraulic cylinder and the third hydraulic cylinder are arranged on the feeding groove side by side along the length direction of the feeding groove, the height from the second hydraulic cylinder to the ground is lower than the height from the third hydraulic cylinder to the ground, the rodless cavity and the rod cavity of the second hydraulic cylinder are respectively provided with an oil inlet port a3 and an oil inlet port a4, the rodless cavity and the rod cavity of the third hydraulic cylinder are respectively provided with an oil inlet port a5 and an oil inlet port a6, after the rodless cavity of the second hydraulic cylinder and the rod cavity of the third hydraulic cylinder are filled with oil, piston rods of the second hydraulic cylinder and the piston rods of the third hydraulic cylinder both penetrate through and extend into the feeding groove to limit the metal tubular workpiece in the feeding groove to slide downwards, and the distance between the two piston rods is 1.3-1.7 times of the outer diameter of the metal tubular workpiece;
the third three-position four-way reversing valve and the first three-position four-way reversing valve have the same structure and are provided with an oil inlet P3, an oil return port T3, a working oil port A3 and a working oil port B3, the first two-position three-way reversing valve and the second two-position three-way reversing valve have the same structure and are respectively provided with an oil inlet P4, an oil inlet P5, a working oil port A4, a working oil port A5 and working oil ports B4 and B5;
an oil inlet P3 of the third three-position four-way reversing valve is connected with an output port of the oil pump, an oil return port T3 is connected with the oil groove, a working oil port A3 is connected with an oil inlet P4, and a working oil port B3 is connected with an oil inlet P5; a working oil port A4 of the first two-position three-way reversing valve is connected with an oil inlet port a3, and a working oil port B4 is connected with an oil inlet port a 5; a working oil port A5 of the second two-position three-way reversing valve is connected with an oil inlet port a4, and a working oil port B5 is connected with an oil inlet port a 6; the controller controls the piston rods on the second hydraulic cylinder and the third hydraulic cylinder to extend into the extending amount of the upper material tank by controlling the running states of the oil pump, the third three-position four-way reversing valve, the first two-position three-way reversing valve and the second two-position three-way reversing valve so as to allow or limit the metal tubular workpiece in the upper material tank to slide out outwards.
The invention is further configured to: the blanking clamping component comprises a fourth hydraulic cylinder with the same structure as the first hydraulic cylinder and a fourth three-position four-way reversing valve with the same structure as the first three-position four-way reversing valve, the fourth hydraulic cylinder is provided with an oil inlet port a7 communicated with a rodless cavity of the fourth hydraulic cylinder and an oil inlet port a8 communicated with a rod cavity of the fourth hydraulic cylinder, the fourth three-position four-way reversing valve is provided with an oil inlet P6, an oil return port T6, a working oil port A6 and a working oil port B6, the oil inlet P6 of the fourth three-position four-way reversing valve is connected with an output port of the oil pump, the oil return port T6 is connected with the oil groove, the working oil port A6 is connected with the oil inlet port a7, and the working oil port B6 is connected with an oil inlet a 8; a first chuck is arranged on a piston rod of the fourth hydraulic cylinder, a second chuck opposite to the first chuck is fixedly arranged on the outer wall of the feeding groove, a discharging area for embedding the metal tubular workpiece is formed by the distance between the first chuck and the second chuck, and the metal tubular workpiece is clamped or loosened through the first chuck and the second chuck.
The invention is further configured to: the blanking conveying part comprises a blanking groove which is formed by surrounding a bottom plate and two side plates and has a U-shaped section, the blanking groove is arranged downwards in an inclined mode, and the discharging area is located right above one end, high in the blanking groove, of the blanking groove.
The invention also provides a control method for the processing equipment, which can effectively improve the feeding efficiency of the metal tubular workpiece, wherein the controller comprises
The first pressure sensing unit is arranged on one end face, close to the metal tubular workpiece in the material receiving component, of the push block, and is used for detecting a pressure value between the push block and the metal tubular workpiece, converting the pressure value and then sending the pressure value to the PLC control unit;
the second pressure sensing units are provided with two pressure sensing units which are respectively arranged on the arc-shaped clamping surfaces of the two adjusting blocks and used for detecting the pressure value between the adjusting blocks and the metal tubular workpiece, converting the pressure value and then sending the pressure value to the PLC control unit;
the third pressure sensing unit is arranged at the end part of the piston rod of the third hydraulic cylinder, and is used for detecting the pressure value between the piston rod of the third hydraulic cylinder and the metal tubular workpiece, converting the pressure value and sending the converted pressure value to the PLC control unit;
the PLC control unit is used for controlling the working states of the oil pump, the first three-position four-way reversing valve, the second three-position four-way reversing valve, the third three-position four-way reversing valve, the first two-position three-way reversing valve and the second two-position three-way reversing valve; the control method comprises the following specific steps of,
step one, material loading and ejection:
firstly, the PLC control unit controls an oil pump to be started, and a third three-position four-way reversing valve is switched from a middle position to a left position;
the first two-position three-way reversing valve is switched to the left position, the second two-position three-way reversing valve is switched to the left position, hydraulic oil in the oil groove sequentially flows to an oil inlet P3, a working oil port A3, an oil inlet P4, a working oil port A4 and an oil inlet port A3 through an oil pump and finally flows to a rodless cavity of the second hydraulic cylinder, so that a piston rod of the second hydraulic cylinder extends outwards, and the third three-position four-way reversing valve is switched to the middle position after the extension amount of the piston rod reaches a preset threshold value;
thirdly, transversely and sequentially placing the metal tubular workpieces into an upper material groove;
after the third pressure sensing unit detects the pressure value, the PLC control unit switches the third three-position four-way reversing valve to the left position, the first two-position three-way reversing valve to the right position, the second two-position three-way reversing valve to the right position, hydraulic oil in the oil groove sequentially flows to the oil inlet P3, the working oil port A3, the oil inlet P4, the working oil port B4 and the oil inlet port a5 through the oil pump, and finally flows into a rodless cavity of the third hydraulic cylinder, so that a piston rod of the third hydraulic cylinder extends outwards and extends into a second metal tubular workpiece close to the lower port of the feeding chute, and after the extension amount of the piston rod of the third hydraulic cylinder reaches a preset threshold value, the third three-position four-way reversing valve is switched to the middle position;
fifthly, after detecting that the metal tubular workpiece is not clamped on the clamping device and is just opposite to the material receiving component, the PLC control unit switches the third three-position four-way reversing valve to the right position, the first two-position three-way reversing valve to the left position, the second two-position three-way reversing valve to the left position, the rod cavity of the second hydraulic cylinder is filled with oil, the rodless cavity is filled with oil, the oil is returned, the hydraulic cylinder is reset, and after a piston rod on the second hydraulic cylinder is separated from the metal tubular workpiece, the metal tubular workpiece slides to the material receiving component;
then the third three-position four-way reversing valve is switched to the left position, the first two-position three-way reversing valve is switched to the left position, the second two-position three-way reversing valve is switched to the left position, oil enters a rodless cavity of the second hydraulic cylinder, oil returns from a rod cavity, and a piston rod of the second hydraulic cylinder extends out; switching the third three-position four-way reversing valve to the right position, switching the first two-position three-way reversing valve to the right position, switching the second two-position three-way reversing valve to the right position, resetting the piston rod on the third hydraulic cylinder, enabling the metal tubular workpiece blocked by the piston rod of the third hydraulic cylinder to fall onto the piston rod on the second hydraulic cylinder, completing a feeding process, and then returning to the fourth step;
after the metal tubular workpiece slides to the material receiving component, the PLC control unit switches the first three-position four-way reversing valve to the left position, hydraulic oil in the oil groove flows to the oil inlet P1, the working oil port A1 and the oil inlet port a1 through the oil pump and then enters a rodless cavity of the first hydraulic cylinder, so that a piston rod on the first hydraulic cylinder extends out, and pushes the push block to move towards the metal tubular workpiece on the material receiving component and pushes the metal tubular workpiece to move towards the clamping device;
seventhly, after the first pressure sensing units detect the pressure values, the PLC control unit switches the second three-position four-way reversing valve to the right position to enable the two adjusting blocks to move back to back and approach the inner wall of the metal tubular workpiece, and after the two second pressure sensing units detect the pressure values and gradually increase to a preset threshold value, the second three-position four-way reversing valve is switched to the middle position to clamp and adjust the metal tubular workpiece; after the pressure value detected by the first pressure sensing unit is gradually increased and reaches a preset threshold value, the fact that the metal tubular workpiece is embedded and tightly abutted on the clamping device is indicated, and the PLC control unit switches the first three-position four-way reversing valve to a middle position;
after the metal tubular workpiece is clamped by the clamping device, the PLC control unit switches the second three-position four-way reversing valve to the left position, so that the two adjusting blocks move oppositely, the metal tubular workpiece is loosened, and then the first three-position four-way reversing valve is switched to the right position, so that the piston rod on the first hydraulic cylinder is reset, and an ejection process is completed;
turning the metal tubular workpiece: ninthly, driving the metal tubular workpiece on the clamping device to transversely and longitudinally move by the moving device, enabling the metal tubular workpiece to be close to the cutter on the cutter arranging device, and processing the metal tubular workpiece by the cutter under the rotating action of the clamping device;
step three, blanking: in the charge control method, after the metal tubular workpiece is processed, the moving device drives the metal tubular workpiece on the clamping device to move transversely and longitudinally and to approach the discharging area;
⑪ after the metal tubular workpiece is sent into the unloading area along the transverse direction, the clamping device loosens the metal tubular workpiece, then the PLC control unit switches the fourth three-position four-way reversing valve to the left position, so that the hydraulic oil in the oil groove flows to the oil inlet P6, the working oil port A6 and the oil inlet port a7 through the oil pump, enters the rodless cavity of the fourth hydraulic cylinder, the piston rod on the fourth hydraulic cylinder extends out, and drives the first chuck to move towards the metal tubular workpiece, the metal tubular workpiece is clamped by the first chuck and the second chuck, then the clamping device is far away from the unloading area along the transverse direction,
⑫ the clamping device moves along the longitudinal and transverse directions to aim at the receiving component, at the same time, the PLC control unit switches the fourth three-position four-way reversing valve to the right position to reset the fourth hydraulic cylinder, the metal pipe-shaped joint falls onto the blanking slot and slides to the charging box to complete a blanking process, and then returns to the fifth step.
The invention has the beneficial effects that:
1. the automatic feeding and discharging device has the advantages that the metal tubular workpiece is fed and discharged in an automatic mode, labor cost is reduced, feeding and discharging efficiency is improved, and machining efficiency of the metal tubular workpiece is improved.
2. For the feeding ejection, the conventional means is to directly eject the workpiece outwards by using an air cylinder, although the purpose can be achieved, there are some problems, such as the fact that whether the center of the metal tubular workpiece is aligned with the clamping device cannot be controlled, when the clamping device clamps the metal tubular workpiece, the clamping force acting on the surface of the metal tubular workpiece is not uniform due to the inclination of the clamping device, a light person scratches the surface of the metal tubular workpiece, and when the clamping device automatically clamps the metal tubular workpiece, the center of the metal tubular workpiece is dislocated, so that the machined metal tubular workpiece is not qualified. The invention adopts a hydraulic mode to drive the push block to move, clamps the metal tubular workpiece through the adjusting device and adjusts the metal tubular workpiece so as to protect one end of the metal tubular workpiece clamped by the clamping device.
3. The clamping device can be controlled by the adjusting device to align the center of the metal tubular workpiece, so that the clamping device can accurately clamp the metal tubular workpiece, the machining precision of the metal tubular workpiece is guaranteed, the clamping device is also suitable for metal tubular workpieces of different models, compared with the traditional mode, the position of the material receiving part does not need to be additionally adjusted, and the clamping device is very convenient and practical.
4. For the reason that the metal tubular workpiece slides down to the material receiving component from the material feeding groove, the buffer device for buffering the metal tubular workpiece in the material feeding groove is further arranged, the metal tubular workpiece can sequentially fall into the material receiving groove under the action of the second hydraulic cylinder and the third hydraulic cylinder, and the material receiving device is very convenient to feed materials for multiple times at one time.
Drawings
FIG. 1 is a schematic top view of the present invention;
FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;
FIG. 3 is an enlarged view at A in FIG. 1;
FIG. 4 is a control connection diagram of the automatic loading and unloading apparatus of the present invention;
FIG. 5 is a schematic structural view of a feeding and pushing component of the present invention;
FIG. 6 is a schematic view of the adjusting device of the present invention;
FIG. 7 is a schematic view of the internal structure of the feeding and conveying member of the present invention;
FIG. 8 is a schematic view of the internal structure of the feeding and conveying member of the present invention;
FIG. 9 is a block diagram of the connections of the controller of the present invention;
FIG. 10 is a control connection diagram between the throttle governor device of the present invention and the oil pump and the first three-position, four-way reversing valve;
the reference numbers in the figures are: 100. a metal tubular workpiece; 1. a machine tool; 11. a processing table; 2. a cutter arranging device; 3. a clamping device; 4. a mobile device; 5. an automatic feeding device; 51. a receiving component; 52. a feeding conveying part; 521. a feeding trough; 53. a feeding and pushing component; 531. a push block; 532. a drive device; 5321. a first hydraulic cylinder; 5322. an oil sump; 5323. a first three-position four-way reversing valve; 5324. an oil pump; 5325. a first pressure sensing unit; 5326. a second pressure sensing unit; 5327. a third pressure sensing unit; 5328. a PLC control unit; 533. an adjustment device; 5331. an adjusting block; 5332. a cylinder body; 5333. a piston ring; 5334. a piston cylinder; 5335. a sealing cylinder; 5336. a sealing cover; 5337. a second three-position four-way reversing valve; 534. a throttle speed regulating device; 5341. a throttle valve; 5342. an on-off valve; 54. a buffer device; 541. a second hydraulic cylinder; 542. a third hydraulic cylinder; 543. a third three-position four-way reversing valve; 544. a first two-position three-way reversing valve; 545. a second two-position three-way directional valve; 6. an automatic blanking device; 61. a blanking clamping component; 611. a fourth hydraulic cylinder; 612. a fourth three-position four-way reversing valve; 613. a first chuck; 614. a second chuck; 615. a discharge area; 62. a blanking conveying part; 621. and (4) discharging the trough.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention is clearly and completely described below with reference to the accompanying drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. For convenience of description, the dimensions of the various features shown in the drawings are not necessarily drawn to scale. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
A processing apparatus for a metal tubular workpiece, as shown in FIGS. 1 and 2, comprises
A machine tool 1 having a machining table 11 at an upper end thereof;
the tool arranging device 2 is arranged on one side of a processing table 11 of the machine tool 1 and is provided with a plurality of groups of tools for processing the metal tubular workpiece 100;
the clamping device 3 is arranged on the other side of the processing table 11 of the machine tool 1, is opposite to the tool arranging device 2, and is used for clamping the metal tubular workpiece 100 and driving the metal tubular workpiece to rotate;
the moving device 4 is used for driving the clamping device 3 to approach or separate from the knife row on the knife row device 2 along the transverse and/or longitudinal direction;
an automatic feeding device 5 for conveying the tubular metal workpiece 100 to be machined to the clamping device 3 and causing the clamping device 3 to clamp it; the automatic feeding device 5 comprises a material receiving part 51 which is arranged on the processing table 11, is arranged at the same side of the cutter arranging device 2 and is used for bearing the metal tubular workpiece 100; a feeding conveying component 52, which is used for conveying a plurality of metal tubular workpieces 100 to be processed to a receiving component 51 in sequence; the feeding pushing component 53 pushes the metal tubular workpiece 100 on the receiving component 51 to the clamping device 3, and the clamping device 3 automatically clamps the metal tubular workpiece;
and an automatic blanking device 6, which is located on the same side as the automatic feeding device 5, and is used for separating the metal tubular workpiece 100 from the clamping device 3 and feeding the metal tubular workpiece 100 into a charging box (not shown) after the clamping device 3 releases the processed metal tubular workpiece 100; the automatic blanking device 6 comprises a blanking clamping part 61, and after the moving device 4 conveys the metal tubular workpiece 100 on the clamping device 3 to the blanking clamping part 61, the metal tubular workpiece 100 is transferred to the blanking clamping part 61; and a blanking conveying member 62, provided immediately below the blanking holding member 61, for carrying the metallic tubular workpiece 100 dropped from the blanking holding member 61 and feeding the metallic tubular workpiece 100 into the charging box.
The automatic feeding and discharging device has the advantages that the metal tubular workpiece is fed and discharged in an automatic mode, labor cost is reduced, feeding and discharging efficiency is improved, and machining efficiency of the metal tubular workpiece is improved.
The feeding and conveying component 52 comprises a feeding trough 521 which is formed by enclosing a cover plate, a bottom plate and two side plates, the feeding trough 521 is obliquely arranged, the higher end of the feeding trough 521 is a material inlet end, the lower end of the feeding trough is a material outlet end, the material outlet end is close to the material receiving component 51, and one side end of the material receiving component 51, which is right opposite to the feeding trough 521, is provided with a notch which is used for a metal tubular workpiece to slide in and penetrates left and right.
For rough machining of the metal tubular workpiece, low cost and high efficiency are key points, and for this purpose, a relatively direct mode is adopted for feeding, namely, the metal tubular workpiece is conveyed to the workbench under the action of gravity, so that the metal tubular workpiece is very convenient to use.
As shown in fig. 3 and 5, the feeding pushing component 53 of the present invention includes a pushing block 531 disposed near the right end face of the receiving component 51; the driving device 532 is used for driving the push block 531 to transversely reciprocate left and right, so that the push block 531 enters the material receiving part 51 and then pushes the metal tubular workpiece to approach the clamping device 3 or reset the push block 531; and an adjusting means 533 provided on the pushing block 531 for clamping and adjusting the position of the metal tubular workpiece so that the central axis thereof is aligned with the center of the holding means 3.
For the loading and ejecting, a common means at present is to directly eject a workpiece outwards by using an air cylinder, although the purpose can be achieved, there are some problems, for example, whether the center of the metal tubular workpiece is aligned with the clamping device 3 cannot be controlled, so that when the clamping device 3 clamps the metal tubular workpiece, the clamping force acting on the surface of the metal tubular workpiece is not uniform due to the inclination of the clamping device, a light person scratches the surface of the metal tubular workpiece, and when the clamping device is used for automatically clamping a heavy person, the center of the metal tubular workpiece is dislocated, so that the processed metal tubular workpiece is not qualified. For this purpose, the present invention employs a hydraulic manner to drive the pushing block 531 to move, and the adjusting device 533 is used to clamp and adjust the metal tubular workpiece, so as to protect one end of the metal tubular workpiece clamped by the clamping device 3.
As shown in fig. 3 and 4, the driving device 532 of the present invention includes a first hydraulic cylinder 5321, an oil sump 5322, a first three-position four-way reversing valve 5323, and an oil pump 5324, wherein the rodless cavity and the rod cavity of the first hydraulic cylinder 5321 are respectively provided with an oil inlet port a1 and an oil inlet port a2, the first three-position four-way reversing valve 5323 is provided with an oil inlet P1, an oil return port T1, an oil working port a1, and an oil working port B1, the oil inlet port a1 is connected to the oil working port a1, the oil inlet port a2 is connected to the oil working port B1, an input port of the oil pump 5324 is connected to the oil sump 5322, an output port thereof is connected to the oil inlet P1 through an oil pipe, and the oil return port T1 is connected to the oil sump 5322 through an oil pipe;
the first three-position four-way reversing valve 5323 has three operating states; when the oil inlet is in a left position, the oil inlet P1 is communicated with a working oil port A1, and the oil return port T1 is communicated with a working oil port B1; when the oil inlet is positioned at the right position, the oil inlet P1 is communicated with the working oil port B1, and the oil return port T1 is communicated with the working oil port A1; when the oil port is positioned at the middle position, the oil ports are not communicated with each other;
the extending end of the piston rod of the first hydraulic cylinder 5321 is disposed on the pushing block 531, and the driving device 532 further includes a controller, which causes the pushing block 531 to push the metal tubular workpiece on the material receiving member 51 to the clamping device 3 or causes the pushing block 531 to reset by controlling the operating states of the first three-position four-way reversing valve 5323 and the oil pump 5324.
As shown in fig. 5, one end surface of the pushing block 531 close to the metal tubular workpiece has a sliding groove arranged along the vertical direction, the adjusting device 533 includes an adjusting block 5331, two adjusting blocks 5331 are both slidably arranged on the sliding groove, and the upper and lower back end surfaces of the two adjusting blocks 5331 are arc-shaped clamping surfaces; the power part is used for driving the two adjusting blocks 5331 to move oppositely or reversely; after the push block 531 is close to the metal tubular workpiece and the two adjusting blocks 5331 are embedded into the metal tubular workpiece, the two adjusting blocks 5331 move backwards to adjust and clamp the metal tubular workpiece; after the metal tubular workpiece is clamped by the clamping device 3, the two adjusting blocks 5331 move towards each other to loosen the metal tubular workpiece.
Be provided with adjusting device 533 on ejector pad 531, can control the center of metal tubular workpiece through adjusting device 533 and aim at clamping device 3 for clamping device 3 can be accurate press from both sides tight metal tubular workpiece, has ensured the machining precision of metal tubular workpiece, and is also suitable for the metal tubular workpiece of different models size, compares in traditional mode, does not need extra adjustment again and connects the position of material part 51, and is very convenient, and practical. For the adjusting device 533, not only the metal tubular workpiece needs to be clamped, but also the center of the metal tubular workpiece needs to be calibrated, and it is intuitive to overlap the center of the metal tubular workpiece with the center of the pushing block 531. In this process, since the center of the metal tubular workpiece is lower than the center of the push block 531 in the initial stage, the upper adjusting block 5331 contacts the inner wall of the metal tubular workpiece first, and lifts the metal tubular workpiece up in an inclined manner, and then the lower adjusting block 5331 contacts the inner wall of the metal tubular workpiece, so that the center of the metal tubular workpiece and the center of the push block 531 are on the same axis.
As shown in fig. 4 and 6, the power unit of the present invention includes a cylinder 5332, a piston ring 5333, a piston cylinder 5334, a seal cylinder 5335, and a seal cover 5336; the cylinder 5332 is vertically arranged, the upper end and the lower end of the cylinder are provided with mounting ports communicated with the inner cavity of the cylinder, and the sealing covers 5336 are of annular structures and are respectively covered with the two mounting ports; the outer diameter of the sealing cylinder 5335 is smaller than the inner diameter of the cylinder 5332, the sealing cylinder 5332 and the sealing cylinder 5335 are coaxially arranged, two piston rings 5333 are respectively sleeved on the upper side and the lower side of the sealing cylinder 5335, the inner wall and the outer wall of the piston ring 5333 are respectively arranged in a sliding and sealing manner with the inner wall of the cylinder 5332 and the outer wall of the sealing cylinder 5335, two piston cylinders 5334 are respectively arranged and sleeved on the upper end and the lower end of the sealing cylinder 5335 in a sliding manner, one end of the piston cylinder 5334 in the cylinder 5332 is fixedly connected with the piston ring 5333, one end of the piston cylinder 5334 extending out of the sealing cylinder 5335 and the cylinder 5332 is fixedly connected with the adjusting block 5331, the cylinder 5332 is further provided with an oil inlet port b1, an oil inlet port b2 and an oil inlet port b3, the oil inlet port b1 and the oil inlet port b2 are respectively communicated with two cavities formed by the sealing cover 5336, the piston cylinder 5334, the piston ring 5333 and the cylinder 5332, the oil inlet port b3 is communicated with a cavity formed by enclosing the two piston rings 5333, the sealing cylinder 5335 and the cylinder body 5332;
the power part further comprises a second three-position four-way reversing valve 5337, the structure of the second three-position four-way reversing valve 5337 is the same as that of the first three-position four-way reversing valve 5323, the second three-position four-way reversing valve 5337 is provided with an oil inlet P2, an oil return port T2, a working oil port A2 and a working oil port B2, an oil inlet port B1 and an oil inlet port B2 are connected with the working oil port A2, the oil inlet port B3 is connected with the working oil port B2, an oil inlet P2 is connected with an output port of an oil pump 5324, and an oil return port T2 is connected with an oil groove 5322.
As for the power part, the most reliable way is to adopt a hydraulic driving way, the oil pump 5324 is used to deliver the hydraulic oil in the oil groove 5322 to the oil inlet b3 in the cylinder 5332, so as to drive the two piston rings 5333 and the two piston cylinders 5334 to move back to back, and further drive the two adjusting blocks 5331 to move back to back, so as to clamp and adjust the metal tubular workpiece, which is very convenient, and can control the moving speed and reduce the abrasion to the inner wall of the metal tubular workpiece; when the oil inlet ports b1 and b2 are used for oil inlet, the two piston rings 5333 and the two piston cylinders 5334 move oppositely to drive the two adjusting blocks 5331 to move oppositely, so that the aim of loosening the metal tubular workpiece is fulfilled.
As shown in fig. 3, 4, 7 and 8, the automatic feeding device 5 of the present invention further includes a buffer device 54, which is disposed in the feeding trough 521 on the feeding and conveying component 52, and is configured to limit the tubular metal workpieces in the feeding trough 521 from sliding outwards at the same time, and to enable one tubular metal workpiece close to the receiving component 51 in the feeding trough 521 to slide into the receiving component 51 within one processing time;
the buffering device 54 includes a second hydraulic cylinder 541, a third hydraulic cylinder 542, a third three-position four-way directional valve 543, a first two-position three-way directional valve 544, and a second two-position three-way directional valve 545; the second hydraulic cylinder 541 and the third hydraulic cylinder 542 are arranged on the feeding trough 521 side by side along the length direction of the feeding trough 521, the height of the second hydraulic cylinder 541 from the ground is lower than the height of the third hydraulic cylinder 542 from the ground, the rodless cavity and the rod cavity of the second hydraulic cylinder 541 are respectively provided with an oil inlet port a3 and an oil inlet port a4, the rodless cavity and the rod cavity of the third hydraulic cylinder 542 are respectively provided with an oil inlet port a5 and an oil inlet port a6, after the rodless cavity of the second hydraulic cylinder 541 and the rod cavity of the third hydraulic cylinder 542 are filled with oil, piston rods of the second hydraulic cylinder 541 and the piston rod of the third hydraulic cylinder 542 penetrate through and extend into the feeding trough 521 to limit the metal tubular workpiece in the feeding trough 521 from sliding down, and the distance between the two piston rods is 1.3 to 1.7 times of the outer diameter of the metal tubular workpiece;
the third three-position four-way reversing valve 543 has the same structure as the first three-position four-way reversing valve 5323, and is provided with an oil inlet P3, an oil return port T3, a working oil port A3 and a working oil port B3, the first two-position three-way reversing valve 544 and the second two-position three-way reversing valve 545 have the same structure and are respectively provided with an oil inlet P4, an oil inlet P5, a working oil port a4, a working oil port a5 and working oil ports B4 and B5;
an oil inlet P3 of the third three-position four-way reversing valve 543 is connected with an output port of an oil pump 5324, an oil return port T3 is connected with an oil groove 5322, a working oil port A3 is connected with an oil inlet P4, and a working oil port B3 is connected with an oil inlet P5; a working oil port A4 of the first two-position three-way reversing valve 544 is connected with an oil inlet port a3, and a working oil port B4 is connected with an oil inlet port a 5; a working oil port A5 of the second two-position three-way reversing valve 545 is connected with an oil inlet port a4, and a working oil port B5 is connected with an oil inlet port a 6; the controller controls the extending amount of the piston rods on the second hydraulic cylinder 541 and the third hydraulic cylinder 542 extending into the upper trough 521 by controlling the operating states of the oil pump 5324, the third three-position four-way reversing valve 543, the first two-position three-way reversing valve 544 and the second two-position three-way reversing valve 545 so as to allow or limit the metal tubular workpiece in the upper trough 521 to slide out.
For the purpose of allowing the tubular metal workpiece to slide down from the feeding chute 521 to the receiving member 51 for multiple times, a buffer device 54 for buffering the tubular metal workpiece in the feeding chute 521 is further provided, and the tubular metal workpiece can be sequentially dropped into the receiving chute by the second hydraulic cylinder 541 and the third hydraulic cylinder 542, which is very convenient.
As shown in fig. 2 and 3, the blanking clamping member 61 of the present invention includes a fourth hydraulic cylinder 611 having the same structure as the first hydraulic cylinder 5321 and a fourth three-position four-way reversing valve 612 having the same structure as the first three-position four-way reversing valve 5323, the fourth hydraulic cylinder 611 has an oil inlet port a7 communicated with its rodless cavity and an oil inlet port a8 communicated with its rod cavity, the fourth three-position four-way reversing valve 612 has an oil inlet P6, an oil return T6, a working oil port a6 and a working oil port B6, the oil inlet P6 of the fourth three-position four-way reversing valve 612 is connected to an output port of the oil pump 5324, the oil return T6 is connected to the 53oil groove 22, the working oil port a6 is connected to the oil inlet port a7, and the working oil port B6 is connected to the oil inlet a 8; a first clamping head 613 is arranged on a piston rod of the fourth hydraulic cylinder 611, a second clamping head 614 opposite to the first clamping head 613 is fixedly arranged on the outer wall of the feeding trough 521, a discharge area 615 for embedding the metal tubular workpiece is formed by the space between the first clamping head 613 and the second clamping head 614, and the metal tubular workpiece is clamped or loosened by the first clamping head 613 and the second clamping head 614.
The blanking conveying part 62 of the invention comprises a blanking groove 621 which is formed by surrounding a bottom plate and two side plates and has a U-shaped section, the blanking groove 621 is arranged downwards in an inclined way, and the discharging area 615 is positioned right above one end of the blanking groove 621.
The present invention is also applied to a control method for the above-described processing apparatus, as shown in fig. 9, wherein the controller includes
The first pressure sensing unit 5325 is arranged on one end face, close to the receiving part 51, of the metal tubular workpiece, of the push block 531, and is used for detecting a pressure value between the push block 531 and the metal tubular workpiece, converting the pressure value and sending the converted pressure value to the PLC control unit 5328;
the second pressure sensing units 5326 are provided with two pressure sensing units which are respectively arranged on the arc-shaped clamping surfaces of the two adjusting blocks 5331 and used for detecting the pressure value between the adjusting blocks 5331 and the metal tubular workpiece, converting the pressure value and sending the converted pressure value to the PLC control unit 5328;
the third pressure sensing unit 5327 is arranged at the end of the piston rod of the third hydraulic cylinder 542, and is used for detecting a pressure value between the piston rod of the third hydraulic cylinder 542 and the metal tubular workpiece, converting the pressure value and sending the converted pressure value to the PLC control unit 5328;
and a PLC control unit 5328 for controlling the operating states of the oil pump 5324, the first three-position four-way selector valve 5323, the second three-position four-way selector valve 5337, the third three-position four-way selector valve 543, the first two-position three-way selector valve 544, and the second two-position three-way selector valve 545; the control method comprises the following concrete steps of,
step one, material loading and ejection:
firstly, the PLC control unit 5328 controls the oil pump 5324 to be started, the third three-position four-way reversing valve 543 is switched from the middle position to the left position, the oil inlet P3 is communicated with the working oil port A3, and the oil return port T3 is communicated with the working oil port B3;
the first two-position three-way reversing valve 544 is switched to a left position, the second two-position three-way reversing valve 545 is switched to the left position, so that the oil inlet P4 is communicated with the working oil port A4, the oil inlet P5 is communicated with the working oil port A5, hydraulic oil in the oil groove 5322 sequentially flows to the oil inlet P3, the working oil port A3, the oil inlet P4, the working oil port A4 and the oil inlet port A3 through the oil pump 5324 and finally flows into a rodless cavity of the second hydraulic cylinder 541, hydraulic oil in the rod cavity of the second hydraulic cylinder 541 flows to the oil inlet port a4, the working oil port A5, the oil inlet P5, the working oil port B3 and the oil return port T3 and finally flows to the oil groove 5322, so that a piston rod of the second hydraulic cylinder 541 extends outwards, and the third three-position three-way reversing valve 543 is switched to a middle position after the extension amount of the piston rod reaches a preset threshold value;
thirdly, the metal tubular workpieces are transversely and sequentially placed into the upper feed chute 521;
fourthly, when the third pressure sensing unit 5327 detects a pressure value, the PLC control unit 5328 switches the third three-position four-way directional valve 543 to the left position, the first two-position three-way directional valve 544 to the right position, the second two-position three-way directional valve 545 to the right position, such that the oil inlet P4 is communicated with the working oil port B4, the oil inlet P5 is communicated with the working oil port B5, hydraulic oil in the oil tank 5322 flows sequentially to the oil inlet P3, the working oil port A3, the oil inlet P4, the working oil port B4, the oil inlet a5, and finally flows to the rodless cavity of the third hydraulic cylinder 542 through the oil pump 5324, hydraulic oil in the rod cavity of the third hydraulic cylinder 542 flows to the oil inlet a6, the working oil port B5, the oil inlet P5, the working oil port B3, the oil return port T3, and finally flows to the oil tank 5322, such that a piston rod of the third hydraulic cylinder 542 extends outward and extends into a second metal tubular workpiece near the lower port of the upper trough 521, after the extension amount of a piston rod of the third hydraulic cylinder 542 reaches a preset threshold value, the third three-position four-way reversing valve 543 is switched to the middle position;
fifthly, after detecting that the metal tubular workpiece is not clamped on the clamping device 3 and is just opposite to the material receiving part 51, the PLC control unit 5328 switches the third three-position four-way reversing valve 543 to the right position, the first two-position three-way reversing valve 544 to the left position, the second two-position three-way reversing valve 545 to the left position, so that the oil inlet P3 is communicated with the working oil port B3, the oil return port T3 is communicated with the working oil port A3, the rod cavity of the second hydraulic cylinder 541 is used for oil inlet, the rodless cavity is used for oil return, the hydraulic cylinder is reset, and after a piston rod on the second hydraulic cylinder 541 is separated from the metal tubular workpiece, the metal tubular workpiece slides to the material receiving part 51;
then, the third three-position four-way reversing valve 543 is switched to the left position, the first two-position three-way reversing valve 544 is switched to the left position, the second two-position three-way reversing valve 545 is switched to the left position, the rodless cavity of the second hydraulic cylinder 541 takes oil, the rod cavity returns oil, and the piston rod of the second hydraulic cylinder 541 extends out; next, the third three-position four-way reversing valve 543 is switched to the right position, the first two-position three-way reversing valve 544 is switched to the right position, and the second two-position three-way reversing valve 545 is switched to the right position, so that the piston rod on the third hydraulic cylinder 542 is reset, the metal tubular workpiece blocked by the piston rod of the third hydraulic cylinder 542 falls onto the piston rod on the second hydraulic cylinder 541, a feeding process is completed, and then the fourth step is returned;
sixthly, after the metal tubular workpiece slides onto the material receiving part 51, the PLC control unit 5328 switches the first three-position four-way reversing valve 5323 to the left position, so that the oil inlet P1 is communicated with the working oil port A1, the oil return port T1 is communicated with the working oil port B1, hydraulic oil in the oil groove 5322 flows to the oil inlet P1, the working oil port A1 and the oil inlet port a1 through the oil pump 5324 and then enters a rodless cavity of the first hydraulic cylinder 5321, hydraulic oil in the rod cavity flows to the oil groove 5322 through the oil inlet port a2, the working oil port B1 and the oil return port T1, so that a piston rod on the first hydraulic cylinder 5321 extends out, the push block 531 is pushed to move towards the metal tubular workpiece on the material receiving part 51, and the metal tubular workpiece is pushed to move towards the clamping device 3;
seventhly, after the first pressure sensing unit 5325 detects a pressure value, the PLC control unit 5328 switches the second three-position four-way reversing valve 5337 to the right position, so that the oil inlet P2 is communicated with the working oil port B2, the oil return port T2 is communicated with the working oil port A2, the two adjusting blocks 5331 move back to back and approach the inner wall of the metal tubular workpiece, and after the two second pressure sensing units 5326 detect the pressure value and gradually increase to a preset threshold value, the second three-position four-way reversing valve 5337 is switched to the middle position to clamp and adjust the metal tubular workpiece; after the pressure value detected by the first pressure sensing unit 5325 gradually increases and reaches a preset threshold value, which indicates that the metal tubular workpiece is embedded and tightly abutted on the clamping device 3, the PLC control unit 5328 switches the first three-position four-way reversing valve 5323 to a neutral position;
eighthly, after the metal tubular workpiece is clamped by the clamping device 3, the PLC control unit 5328 switches the second three-position four-way reversing valve 5337 to the left position, so that the two adjusting blocks 5331 move oppositely to release the metal tubular workpiece, and then switches the first three-position four-way reversing valve 5323 to the right position to reset the piston rod on the first hydraulic cylinder 5321, thereby completing an ejection process;
turning the metal tubular workpiece: ninthly, the metal tubular workpiece on the clamping device 3 is driven by the moving device 4 to move transversely and longitudinally and is close to the cutter on the cutter arranging device 2, and the metal tubular workpiece is processed by the cutter under the rotating action of the clamping device 3;
step three, blanking: after the metal tubular workpiece at the front end (R) is processed, the moving device 4 drives the metal tubular workpiece on the clamping device 3 to move transversely and longitudinally and to approach to a discharging area 615;
⑪, after the metal tubular workpiece is fed into the unloading area 615 along the transverse direction, the clamping device 3 releases the metal tubular workpiece, then the PLC control unit 5328 switches the fourth three-position four-way directional control valve 612 to the left position, so that the oil inlet P6 is communicated with the working oil port a6, the oil return port T6 is communicated with the working oil port B6, the hydraulic oil in the oil tank 5322 flows to the oil inlet P6, the working oil port a6 and the oil inlet port a7 through the oil pump 5324, enters the rodless cavity of the fourth hydraulic cylinder 611, the hydraulic oil in the rod cavity flows to the oil tank 5322 through the oil inlet port A8, the working oil port B6 and the oil return port T6, so that the piston rod on the fourth hydraulic cylinder 611 extends out and drives the first chuck 613 to move towards the metal tubular workpiece, the metal tubular workpiece is clamped by the first chuck 613 and the second chuck 614, then the clamping device 3 moves away from the unloading area 615 along the transverse direction,
⑫ the holding device 3 moves along the longitudinal and transverse directions to align with the receiving component 51, at the same time, the PLC control unit 5328 switches the fourth three-position four-way directional valve 612 to the right position, so that the fourth hydraulic cylinder 611 is reset, the metal pipe-shaped joint falls onto the blanking slot 621 and slides to the charging box, completing a blanking process, and then returns to the fifth step.
As shown in fig. 3 and 10, further, in order to avoid the collision when the metal tubular workpiece slides down onto the material receiving component 51, the pushing block 531 and the adjusting device 533 have a certain distance from the material receiving component 51, that is, after the metal tubular workpiece slides onto the material receiving component 51, the metal tubular workpiece has a certain distance from the pushing block 531 and the adjusting device 533, on the premise that stable ejection of the metal tubular workpiece is ensured, and in order to improve ejection efficiency, in this embodiment, a throttling speed adjusting device 534 is further provided on the oil pipe between the oil pump 5324 and the first three-position four-way reversing valve 5323, the throttling speed adjusting device 534 includes a throttling valve 5341 and an on-off valve 5342, the throttling valve 5341 and the on-off valve 5342 are connected in parallel, and the on-off valve 5342 is controlled by the PLC control unit 5328 to be in an on-off state.
In the above control method, further comprising
In the step sixthly, after the metal tubular workpiece slides to the material receiving part 51, the PLC control unit 5328 further opens the on-off valve 5342, and the hydraulic oil in the oil groove 5322 partially flows to the oil inlet P1 through the throttle valve 5341 and the on-off valve 5342, so that the push block 531 rapidly moves toward the metal tubular workpiece;
in step (c), after the first pressure sensing unit 5325 detects the pressure value, the PLC control unit 5328 further disconnects the on-off valve 5342, so that the hydraulic oil flows to the oil inlet P1 through the throttle valve 5341, and the push block 531 slowly pushes the metal tubular workpiece to move toward the clamping device 3 because the hydraulic oil entering the oil inlet P1 is reduced; the hydraulic oil entering the oil inlet P2 is increased, so that the two adjusting blocks 5331 quickly move towards the inner wall of the metal tubular workpiece; after the second pressure sensing units 5326 on the lower adjusting block 5331 detect the pressure value, the on-off valve 5342 is opened again, so that the pressure values detected by the two second pressure sensing units 5326 are slowly increased, the push block 531 rapidly moves again, and the metal tubular workpiece is pushed to move towards the clamping device 3;
in step (viii), after the clamping device 3 clamps the metal tubular workpiece, the PLC control device also opens the on-off valve 5342, so that the first hydraulic cylinder 5321 is quickly reset.
By adopting the control method, the feeding efficiency can be improved, the inner wall of the metal tubular workpiece can be prevented from being scratched, and the adjusting device 533 can be stably clamped and adjusted in the moving process of the metal tubular workpiece.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. A processing equipment of metal tubular workpiece is characterized in that: comprises that
A machine tool (1) having a machining table (11) at an upper end thereof;
the tool arranging device (2) is arranged on one side of a processing table (11) of the machine tool (1) and is provided with a plurality of groups of tools for processing metal tubular workpieces;
the clamping device (3) is arranged on the other side of the processing table (11) of the machine tool (1), is opposite to the cutter arranging device (2), and is used for clamping the metal tubular workpiece and driving the metal tubular workpiece to rotate;
the moving device (4) is used for driving the clamping device (3) to approach or separate from the cutter row on the cutter row device (2) along the transverse and/or longitudinal direction;
the automatic feeding device (5) is used for conveying the metal tubular workpiece to be processed to the clamping device (3) and enabling the clamping device (3) to clamp the metal tubular workpiece; the automatic feeding device (5) comprises a material receiving part (51) which is arranged on the processing table (11), is arranged at the same side of the cutter arranging device (2) and is used for bearing a metal tubular workpiece; the feeding conveying component (52) is used for conveying a plurality of metal tubular workpieces to be processed to the receiving component (51) in sequence; the feeding pushing component (53) pushes the metal tubular workpiece on the receiving component (51) to the clamping device (3) and is automatically clamped by the clamping device (3);
the automatic blanking device (6) is arranged on the same side as the automatic feeding device (5) and is used for separating the metal tubular workpiece from the clamping device (3) and sending the metal tubular workpiece into the charging box after the clamping device (3) loosens the processed metal tubular workpiece; the automatic blanking device (6) comprises a blanking clamping part (61), and after the metal tubular workpiece on the clamping device (3) is conveyed to the blanking clamping part (61) by the moving device (4), the metal tubular workpiece is transferred to the blanking clamping part (61); the blanking conveying component (62) is arranged right below the blanking clamping component (61) and is used for bearing the metal tubular workpiece falling from the blanking clamping component (61) and sending the metal tubular workpiece into the charging box;
the feeding conveying component (52) comprises a feeding groove (521) which is formed by enclosing a cover plate, a bottom plate and two side plates, the feeding groove (521) is obliquely arranged, the high end of the feeding groove is a material inlet end, the low end of the feeding groove is a material outlet end, the material outlet end is close to the material receiving component (51), and a notch which is used for a metal tubular workpiece to slide in and penetrates through the feeding groove (521) is formed in one side end, right opposite to the feeding groove (521), of the material receiving component (51);
the feeding pushing part (53) comprises a pushing block (531) close to the right end face of the receiving part (51); the driving device (532) is used for driving the push block (531) to do left-right transverse reciprocating movement, so that the push block (531) enters the material receiving part (51) and then pushes the metal tubular workpiece to approach the clamping device (3) or reset the push block (531); and an adjusting device (533) arranged on the push block (531) and used for clamping and adjusting the position of the metal tubular workpiece to enable the central axis to be aligned with the center of the clamping device (3);
the driving device (532) comprises a first hydraulic cylinder (5321), an oil groove (5322), a first three-position four-way reversing valve (5323) and an oil pump (5324), wherein an oil inlet port a1 and an oil inlet port a2 are respectively arranged on a rodless cavity and a rod cavity of the first hydraulic cylinder (5321), the first three-position four-way reversing valve (5323) is provided with an oil inlet P1, an oil return port T1, a working oil port A1 and a working oil port B1, the oil inlet port a1 is connected with the working oil port A1, the oil inlet port a2 is connected with the working oil port B1, an input port of the oil pump (5324) is connected with the oil groove (5322), an output port of the oil pump is connected with the oil inlet P1 through an oil pipe, and the oil return port T1 is connected to the oil groove (5322) through an oil pipe;
the first three-position four-way reversing valve (5323) has three working states; when the oil inlet is positioned at the left position, the oil inlet P1 is communicated with a working oil port A1, and the oil return port T1 is communicated with a working oil port B1; when the oil inlet is positioned at the right position, the oil inlet P1 is communicated with the working oil port B1, and the oil return port T1 is communicated with the working oil port A1; when the oil port is positioned at the middle position, the oil ports are not communicated with each other;
the extension end of a piston rod on the first hydraulic cylinder (5321) is arranged on the push block (531), the driving device (532) further comprises a controller, and the push block (531) pushes a metal tubular workpiece on the material receiving component (51) to the clamping device (3) or resets the push block (531) by controlling the running states of the first three-position four-way reversing valve (5323) and the oil pump (5324);
one end face, close to the metal tubular workpiece, of the push block (531) is provided with a sliding groove arranged in the vertical direction, the adjusting device (533) comprises two adjusting blocks (5331), two adjusting blocks (5331) are arranged on the sliding groove in a sliding mode, and one end face, back to the upper portion and the lower portion, of each adjusting block (5331) is an arc-shaped clamping face; the power part is used for driving the two adjusting blocks (5331) to move oppositely or reversely; after the push block (531) is close to the metal tubular workpiece and the two adjusting blocks (5331) are embedded into the metal tubular workpiece, the two adjusting blocks (5331) move backwards to adjust and clamp the metal tubular workpiece; after the metal tubular workpiece is clamped by the clamping device (3), the two adjusting blocks (5331) move oppositely to loosen the metal tubular workpiece.
2. A processing apparatus of a metal tubular workpiece as set forth in claim 1, wherein: the power part comprises a cylinder body (5332), a piston ring (5333), a piston cylinder (5334), a sealing cylinder (5335) and a sealing cover (5336); the cylinder body (5332) is vertically arranged, the upper end and the lower end of the cylinder body are provided with mounting ports communicated with the inner cavity of the cylinder body, the sealing covers (5336) are of annular structures, and two sealing covers respectively cover the two mounting ports; the outer diameter of the sealing cylinder (5335) is smaller than the inner diameter of the cylinder body (5332), the sealing cylinder (5332) is fixed in the cylinder body (5332) through a connecting rib circumferentially arranged in the middle of the outer wall, the cylinder body (5332) and the sealing cylinder (5335) are coaxially arranged, two piston rings (5333) are respectively sleeved on the upper side and the lower side of the sealing cylinder (5335), the inner wall and the outer wall of the piston rings (5333) are respectively in sliding sealing arrangement with the inner wall of the cylinder body (5332) and the outer wall of the sealing cylinder (5335), two piston cylinders (5334) are respectively sleeved on the upper end and the lower end of the sealing cylinder (5335) in a sliding manner, one end of each piston cylinder (5334) located in the cylinder body (5332) is fixedly connected with the piston rings (5333), one end of each piston cylinder (5334) extending out of the sealing cylinder body (5335) is fixedly connected with the adjusting block (5331), and an oil inlet port 1 b is further formed in the cylinder body (5332), The oil inlet port b1 and the oil inlet port b2 are respectively communicated with two cavities formed by enclosing of a sealing cover (5336), a piston cylinder (5334), piston rings (5333) and a cylinder body (5332), and the oil inlet port b3 is communicated with a cavity formed by enclosing of two piston rings (5333), a sealing cylinder (5335) and a cylinder body (5332);
the power part further comprises a second three-position four-way reversing valve (5337), the structure of the second three-position four-way reversing valve (5337) is the same as that of the first three-position four-way reversing valve (5323), an oil inlet P2, an oil return port T2, a working oil port A2 and a working oil port B2 are arranged, an oil inlet port B1 and an oil inlet port B2 are connected with the working oil port A2, an oil inlet port B3 is connected with the working oil port B2, the oil inlet P2 is connected with an output port of an oil pump (5324), and the oil return port T2 is connected with the oil groove (5322).
3. A processing apparatus of a metal tubular workpiece as set forth in claim 2, wherein: the automatic feeding device (5) further comprises a buffer device (54), the buffer device is arranged in a feeding groove (521) on the feeding conveying component (52) and used for limiting the metal tubular workpiece in the feeding groove (521) to slide outwards at the same time, and one metal tubular workpiece close to the material receiving component (51) in the feeding groove (521) slides into the material receiving component (51) within one processing time;
the buffer device (54) comprises a second hydraulic cylinder (541), a third hydraulic cylinder (542), a third three-position four-way reversing valve (543), a first two-position three-way reversing valve (544) and a second two-position three-way reversing valve (545); the second hydraulic cylinder (541) and the third hydraulic cylinder (542) are arranged on the upper trough (521) side by side along the length direction of the upper trough (521), the height from the second hydraulic cylinder (541) to the ground is lower than the height from the third hydraulic cylinder (542) to the ground, an oil inlet port a3 and an oil inlet port a4 are respectively arranged on a rodless cavity and a rod cavity of the second hydraulic cylinder (541), an oil inlet port a5 and an oil inlet port a6 are respectively arranged on a rodless cavity and a rod cavity of the third hydraulic cylinder (542), after oil is fed into the rodless cavity of the second hydraulic cylinder (541) and the rod cavity of the third hydraulic cylinder (542), piston rods of the second hydraulic cylinder and the piston rod of the third hydraulic cylinder both penetrate through and extend into the upper trough (521) to limit the metal tubular workpiece in the upper trough (521) to slide downwards, and the distance between the two piston rods is 1.3-1.7 times of the outer diameter of the metal tubular workpiece;
the third three-position four-way reversing valve (543) has the same structure as the first three-position four-way reversing valve (5323), and is provided with an oil inlet P3, an oil return port T3, a working oil port A3 and a working oil port B3, the first two-position three-way reversing valve (544) and the second two-position three-way reversing valve (545) have the same structure, and are respectively provided with an oil inlet P4, an oil inlet P5, a working oil port A4, a working oil port A5, working oil ports B4 and B5;
an oil inlet P3 of the third three-position four-way reversing valve (543) is connected with an output port of the oil pump (5324), an oil return port T3 is connected with the oil groove (5322), a working oil port A3 is connected with an oil inlet P4, and a working oil port B3 is connected with an oil inlet P5; a working oil port A4 of the first two-position three-way reversing valve (544) is connected with an oil inlet port a3, and a working oil port B4 is connected with an oil inlet port a 5; a working oil port A5 of the second two-position three-way reversing valve (545) is connected with an oil inlet port a4, and a working oil port B5 is connected with an oil inlet port a 6; the controller controls the running states of the oil pump (5324), the third three-position four-way reversing valve (543), the first two-position three-way reversing valve (544) and the second two-position three-way reversing valve (545) to control the extending amount of piston rods on the second hydraulic cylinder (541) and the third hydraulic cylinder (542) extending into the upper trough (521), so that the metal tubular workpiece in the upper trough (521) can be allowed or limited to slide out.
4. A processing apparatus of a metal tubular workpiece as set forth in claim 3, wherein: the blanking clamping component (61) comprises a fourth hydraulic cylinder (611) with the same structure as the first hydraulic cylinder (5321) and a fourth three-position four-way reversing valve (612) with the same structure as the first three-position four-way reversing valve (5323), the fourth hydraulic cylinder (611) is provided with an oil inlet port a7 communicated with a rodless cavity of the fourth hydraulic cylinder and an oil inlet port a8 communicated with a rod cavity of the fourth hydraulic cylinder, the fourth three-position four-way reversing valve (612) is provided with an oil inlet P6, an oil return T6, a working oil port A6 and a working oil port B6, the oil inlet P6 of the fourth three-position four-way reversing valve (612) is connected with an output port of the oil pump (5324), the oil return T6 is connected with the oil groove (5322), the working oil port A6 is connected with the oil inlet port a7, and the working oil port B6 is connected with the oil inlet a 8; a piston rod of the fourth hydraulic cylinder (611) is provided with a first clamping head (613), the outer wall of the feeding trough (521) is fixedly provided with a second clamping head (614) opposite to the first clamping head (613), a discharge area (615) for embedding the metal tubular workpiece is formed by the space between the first clamping head (613) and the second clamping head (614), and the metal tubular workpiece is clamped or loosened by the first clamping head (613) and the second clamping head (614).
5. The apparatus for processing a metallic tubular workpiece as set forth in claim 4, wherein: the blanking conveying part (62) comprises a blanking groove (621) which is formed by surrounding a bottom plate and two side plates and has a U-shaped cross section, the blanking groove (621) is arranged downwards in an inclined mode, and the discharging area (615) is located right above one end, high in the blanking groove (621).
6. A control method for the processing apparatus according to claim 5, characterized in that: the controller comprises
The first pressure sensing unit (5325) is arranged on one end face, close to the material receiving part (51), of the push block (531), and used for detecting a pressure value between the push block (531) and the metal tubular workpiece, converting the pressure value and sending the converted pressure value to the PLC control unit (5328);
the second pressure sensing units (5326) are provided with two pressure sensing units which are respectively arranged on the arc-shaped clamping surfaces of the two adjusting blocks (5331) and used for detecting the pressure value between the adjusting blocks (5331) and the metal tubular workpiece, converting the pressure value and sending the converted pressure value to the PLC control unit (5328);
the third pressure sensing unit (5327) is arranged at the end part of the piston rod of the third hydraulic cylinder (542) and used for detecting the pressure value between the piston rod of the third hydraulic cylinder (542) and the metal tubular workpiece, converting the pressure value and sending the converted pressure value to the PLC control unit (5328);
and a PLC control unit (5328) for controlling the working states of the oil pump (5324), the first three-position four-way reversing valve (5323), the second three-position four-way reversing valve (5337), the third three-position four-way reversing valve (543), the first two-position three-way reversing valve (544) and the second two-position three-way reversing valve (545); the control method comprises the following specific steps of,
step one, material loading and ejection:
the PLC control unit (5328) controls the oil pump (5324) to be started, and the third three-position four-way reversing valve (543) is switched from the middle position to the left position;
the first two-position three-way reversing valve (544) is switched to the left position, the second two-position three-way reversing valve (545) is switched to the left position, hydraulic oil in the oil groove (5322) sequentially flows to the oil inlet P3, the working oil port A3, the oil inlet P4, the working oil port A4 and the oil inlet port A3 through the oil pump (5324), and finally flows to a rodless cavity of the second hydraulic cylinder (541), so that a piston rod of the second hydraulic cylinder (541) extends outwards, and the third three-position four-way reversing valve (543) is switched to the middle position after the extension amount of the piston rod reaches a preset threshold value;
thirdly, transversely and sequentially placing the metal tubular workpieces into an upper feed chute (521);
fourthly, when the third pressure sensing unit (5327) detects a pressure value, the PLC control unit (5328) switches the third three-position four-way reversing valve (543) to the left position, the first two-position three-way reversing valve (544) to the right position, the second two-position three-way reversing valve (545) to the right position, hydraulic oil in the oil groove (5322) flows to the oil inlet P3, the working oil port A3, the oil inlet P4, the working oil port B4 and the oil inlet port a5 in sequence through the oil pump (5324), and finally flows to a rodless cavity of the third hydraulic cylinder (542), so that a piston rod of the third hydraulic cylinder (542) extends outwards and extends into a second metal tubular workpiece close to the lower port of the feeding trough (521), and after the extension amount of the piston rod of the third hydraulic cylinder (542) reaches a preset threshold value, the third three-position four-way reversing valve (543) is switched to the middle position;
fifthly, after detecting that the metal tubular workpiece is not clamped on the clamping device (3) and is just opposite to the material receiving part (51), the PLC control unit (5328) switches the third three-position four-way reversing valve (543) to the right position, the first two-position three-way reversing valve (544) to the left position, the second two-position three-way reversing valve (545) to the left position, the rod cavity of the second hydraulic cylinder (541) is filled with oil, the rodless cavity is filled with oil, resetting is carried out, and after a piston rod on the second hydraulic cylinder (541) is separated from the metal tubular workpiece, the metal tubular workpiece slides onto the material receiving part (51);
then the third three-position four-way reversing valve (543) is switched to the left position, the first two-position three-way reversing valve (544) is switched to the left position, the second two-position three-way reversing valve (545) is switched to the left position, oil enters the rodless cavity of the second hydraulic cylinder (541), oil returns from the rod cavity, and the piston rod of the second hydraulic cylinder (541) extends out; next, the third three-position four-way reversing valve (543) is switched to the right position, the first two-position three-way reversing valve (544) is switched to the right position, the second two-position three-way reversing valve (545) is switched to the right position, so that the piston rod on the third hydraulic cylinder (542) is reset, the metal tubular workpiece blocked by the piston rod of the third hydraulic cylinder (542) falls onto the piston rod on the second hydraulic cylinder (541), a feeding process is completed, and then the fourth step is returned;
after the metal tubular workpiece slides onto the material receiving component (51), the PLC control unit (5328) switches the first three-position four-way reversing valve (5323) to the left position, hydraulic oil in the oil groove (5322) flows to the oil inlet P1, the working oil port A1 and the oil inlet port a1 through the oil pump (5324) and then enters a rodless cavity of the first hydraulic cylinder (5321), so that a piston rod on the first hydraulic cylinder (5321) extends out, the push block (531) is pushed to move towards the metal tubular workpiece on the material receiving component (51), and the metal tubular workpiece is pushed to move towards the clamping device (3);
seventhly, after the first pressure sensing unit (5325) detects the pressure value, the PLC control unit (5328) switches the second three-position four-way reversing valve (5337) to the right position to enable the two adjusting blocks (5331) to move back to back and approach the inner wall of the metal tubular workpiece, and after the two second pressure sensing units (5326) detect the pressure value and gradually increase to a preset threshold value, the second three-position four-way reversing valve (5337) is switched to the middle position to clamp and adjust the metal tubular workpiece; after the pressure value detected by the first pressure sensing unit (5325) is gradually increased and reaches a preset threshold value, that is, the metal tubular workpiece is embedded and tightly propped against the clamping device (3), the PLC control unit (5328) switches the first three-position four-way reversing valve (5323) to a middle position;
after the metal tubular workpiece is clamped by the clamping device (3), the PLC control unit (5328) switches the second three-position four-way reversing valve (5337) to the left position, so that the two adjusting blocks (5331) move oppositely to loosen the metal tubular workpiece, and then switches the first three-position four-way reversing valve (5323) to the right position to reset a piston rod on the first hydraulic cylinder (5321) to complete an ejection process;
turning the metal tubular workpiece: ninthly, driving the metal tubular workpiece on the clamping device (3) to transversely and longitudinally move by the moving device (4), enabling the metal tubular workpiece to be close to the cutter on the cutter arranging device (2), and processing the metal tubular workpiece by the cutter under the rotating action of the clamping device (3);
step three, blanking: after the metal tubular workpiece at the front end (R) is processed, the metal tubular workpiece on the clamping device (3) is driven by the moving device (4) to move transversely and longitudinally and approach to the discharging area (615);
⑪ after the metal tubular workpiece is sent into the unloading area (615) along the transverse direction, the clamping device (3) releases the metal tubular workpiece, then the PLC control unit (5328) switches the fourth three-position four-way reversing valve (612) to the left position, so that the hydraulic oil in the oil tank (5322) flows to the oil inlet P6, the working oil port A6 and the oil inlet port a7 through the oil pump (5324) and enters the rodless cavity of the fourth hydraulic cylinder (611), so that the piston rod on the fourth hydraulic cylinder (611) extends out and drives the first clamping head (613) to move towards the metal tubular workpiece, the metal tubular workpiece is clamped by the first clamping head (613) and the second clamping head (614), and then the clamping device (3) is far away from the unloading area (615) along the transverse direction,
⑫ the clamping device (3) moves along the longitudinal direction and the transverse direction to align with the material receiving component (51), at the same time, the PLC control unit (5328) switches the fourth three-position four-way reversing valve (612) to the right position to reset the fourth hydraulic cylinder (611), the metal tubular joint falls onto the blanking groove (621) and slides to the charging box to complete a blanking process, and then returns to the fifth step.
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