CN108284320B

CN108284320B - Cradle type double-rotary workbench special for short-arc combined machining center

Info

Publication number: CN108284320B
Application number: CN201810188242.6A
Authority: CN
Inventors: 周碧胜
Original assignee: Xinjiang Short Electric Arc Scientific & Technical Development Co ltd; Dalian Kede Numerical Control Co Ltd
Current assignee: Xi'an Jinhu Aviation Technology Co ltd; Dalian Kede Numerical Control Co Ltd
Priority date: 2018-03-07
Filing date: 2018-03-07
Publication date: 2020-07-17
Anticipated expiration: 2038-03-07
Also published as: CN108284320A

Abstract

The invention discloses a cradle type double-rotary workbench special for a short arc combined machining center, which comprises a cradle swing frame, a C-axis power part, a workbench part and an anode device, wherein the cradle swing frame is installed in a matching way with an A-axis torque motor, the C-axis power part is installed in the swing frame, and the anode device is installed in a cradle. The cable enters the cradle from the outside of the machine tool through the cradle swing frame and a hole at the mounting part of the torque motor, a copper wiring terminal is mounted at the end of the anode cable, and the wiring terminal is tightly attached to the anode collector plate through an inner hexagonal flat round head screw. The special power supply for the short arc composite machining center can generate specific waveform current and voltage to process the workpiece by the special tool and the special double-rotary worktable. The invention remarkably improves the processing efficiency by combining short electric arc processing and mechanical processing, and particularly solves the problems of difficult processing and low efficiency of high-hardness materials. The short electric arc tool electrode is used for machining, so that the loss of a machining cutter is reduced, and the machining cost is reduced.

Description

Cradle type double-rotary workbench special for short-arc combined machining center

Technical Field

The invention relates to the technical field of short electric arcs, in particular to a cradle type double-rotary worktable special for a short electric arc combined machining center.

Background

Short arc discharge: the device is a discharge group phenomenon which can be effectively controlled and is generated by specific current, voltage waveform, frequency, amplitude, discharge mode and the like through reasonable mechanical motion and electric action under the action of a gas-liquid mixed working medium.

Short arc processing technology: the method is an electric cutting method for removing metal or nonmetal conductive material by using excited short arc discharge group or electric spark discharge group generated between two electrodes under the action of working medium of gas-liquid mixture with pressure in a certain proportion, belongs to the technical field of electric machining in special machining industry, and is a novel strong electron flow, ion flow and arc flow cutting electric machining technology and a new industrial name.

Short arc combined machining center: the short arc machining and the mechanical machining are combined to form the machining center which can be completed on one device. The current aviation product parts are prominently represented by various small batches, complex technological processes and widely adopt an integral thin-wall structure and difficult-to-machine materials, so that bottlenecks of long manufacturing period, large material cutting amount, low machining efficiency, serious machining deformation and the like generally exist in the manufacturing process. In order to improve the machining efficiency and the machining precision of aviation complex products, the inventor creatively combines short arc machining and mechanical machining, and invents a novel, efficient and precise short arc composite machining center.

In the invention process of the short arc composite machining center, one of important technical problems is to combine the short arc anode device and a worktable for machining on one machining center.

Disclosure of Invention

The invention aims to solve the problems and provide a cradle type double-rotary worktable special for a short arc combined machining center so as to combine a short arc anode device and a worktable for machining on one machining center.

The purpose of the invention is realized by adopting the following technical scheme:

a cradle type double-rotary workbench special for a short arc composite machining center comprises a cradle swing frame which is installed in a matched mode with an A-axis torque motor, a C-axis chassis is fixed inside the cradle swing frame through hexagon socket head cap bolts, and a C-axis torque motor stator is installed on the C-axis chassis; the workbench mounting base is mounted on a C-axis torque motor rotor through a rotor connecting flange, a YRT turntable bearing is mounted on the workbench mounting base, the inner ring of the YRT turntable bearing is fixed on the workbench mounting base through an inner hexagon bolt, and the outer ring of the bearing is fixed on a cradle swing frame through an inner hexagon bolt; a circular grating fixing flange is installed in the center of the workbench installation base through an inner hexagon bolt, an absolute value encoder is installed on the circular grating fixing flange through the inner hexagon bolt, the absolute value encoder is partially sealed through a circular grating sealing cover, and a water-cooling transition disc installed on a C-axis base is arranged outside the absolute value encoder; a marble interlayer, a casting workbench and an anode main shaft matched with the casting workbench are sequentially assembled above the workbench mounting base; installing an insulating sleeve, a heat insulating sleeve and an aluminum alloy shielding sleeve on a C-axis chassis inside the cradle, and fixing an anode base on a bottom ring of the aluminum alloy shielding sleeve through an inner hexagon bolt; the carbon brush holder is fixed on the anode collector plate through a half-round square bolt and an inner hexagon screw at two sides of the upper plate surface of the anode collector plate, the carbon brush is installed on the carbon brush holder, the carbon brush holder is provided with a volute spring, the carbon brush is tightly pressed on an anode main shaft through the volute spring, a threaded hole is processed on the lower plate of the anode collector plate, a connecting terminal is installed at the end of an anode cable, and the connecting terminal is tightly attached to the anode collector plate through the inner hexagon flat round head screw; the front surface of the anode base is provided with a cable fixing head for fixing the cable, and a copper powder collecting and discharging device is arranged below the anode base and is sealed by a sealing rubber strip and a sealing cover to prevent water and oil from permeating.

Preferably, the C-axis chassis is fixed on the cradle swing frame through hexagon socket head cap screws, and the bottom of the C-axis chassis is provided with a cooling water joint and a hydraulic oil pipe joint; an oil way and a water way channel are processed inside the shaft C chassis; install water-cooling transition dish above C axle chassis, the inside processing of water-cooling transition dish has waterway, and the cooling water gets into from C axle chassis, and through water-cooling transition dish from C axle chassis cooling water outlet discharge again to the lathe precision is guaranteed to the cooling absolute value encoder.

Preferably, the casting workbench is a workbench processed with a standard T-shaped groove and is arranged on the marble interlayer; the marble interlayer material is artificial marble and is arranged on the workbench mounting base; an anode main shaft is arranged in the center of the workbench, and a sealing cover is additionally arranged on the anode main shaft to prevent water and oil from permeating into and corroding the anode main shaft.

Preferably, the anode collector plate is arranged on an anode base, the anode base is arranged on a bottom ring of an aluminum alloy shielding sleeve, and the aluminum alloy shielding sleeve is fixed on the C-axis base through an inner hexagon screw; the carbon brush holder is fixed on the anode collector plate through hexagon socket screws and half-head square-diameter bolts, the carbon brush is arranged on the carbon brush holder, and the carbon brush is tightly attached to an anode main shaft through a volute spiral spring arranged on the carbon brush holder; and a threaded hole is processed in the lower part of the anode collector plate, a wiring terminal is installed at the end of the anode cable, and the wiring terminal is fixed on the anode collector plate through an inner hexagonal flat head screw.

Preferably, the anode base is made of an insulating material and is arranged on the aluminum alloy shielding sleeve base ring through an inner hexagon screw; a cable fixing head is arranged on the front surface of the anode base, and a cable connected with the anode collector plate is fixed on the anode base through the fixing head; a quick air pipe joint is arranged on the back surface of the anode base, and cold air is continuously blown into the inner cavity of the anode base so as to reduce the temperature of the inner cavity; and a sealing rubber strip and a sealing cover are arranged below the anode base, so that the sealing property of the inner cavity of the anode base is ensured.

Preferably, the insulating sleeve is made of a material with good insulating property and is located at the position closest to the anode main shaft, the aluminum alloy shielding sleeve is arranged on the outer layer of the insulating sleeve, and the heat insulation sleeve processed by adopting a heat insulation material is arranged on the outer layer of the aluminum alloy shielding sleeve, so that current passing through the heat insulation sleeve can be prevented from influencing the precision of the machine tool due to the magnetization of surrounding metal and the temperature rise.

Preferably, the copper powder collecting and discharging device comprises a V-shaped collecting chassis and a negative pressure collecting air pipe joint; copper powder generated by the anode main shaft and the carbon brush falls into the V-shaped collecting base plate, and then is discharged through the air pipe by the negative pressure collecting air pipe joint.

The invention discloses a cradle type double-rotary workbench special for a short arc composite machining center, which comprises a cradle swing frame arranged on an A-axis torque motor, a C-axis torque motor arranged in the cradle swing frame, a workbench mounting base, a marble interlayer, a casting workbench and an anode main shaft matched with the casting workbench, wherein the workbench mounting base, the marble interlayer and the casting workbench are sequentially arranged on the C-axis torque motor in a matched manner. The device comprises a rotor connecting flange for connecting a workbench mounting base and a C-axis torque motor rotor, a YRT turntable bearing and a circular grating fixing flange which are mounted on the workbench mounting base, an absolute value encoder mounted on the circular grating fixing flange and a circular grating sealing cover mounted on the workbench mounting base and used for sealing. The cradle comprises a C-axis chassis arranged in the cradle, wherein an insulating sleeve, a heat insulating sleeve, an aluminum alloy shielding sleeve and a water-cooling transition disc are arranged on the C-axis chassis, and a water pipe joint and an oil pipe joint are arranged below the C-axis chassis. The positive pole base is fixed on the ring of aluminum alloy housing's end, install positive pole current collection board through hexagon socket head cap screw in positive pole base top panel below, the both sides of face are fixed carbon brush holder above that through half-round head square diameter bolt and hexagon socket head cap screw on positive pole current collection board, the carbon brush is installed on carbon brush holder, install the spiral spring on carbon brush holder, compress tightly the carbon brush on the positive pole main shaft through the spiral spring, positive pole current collection board lower panel processing threaded hole, binding post is installed to positive pole cable end, closely laminate binding post on positive pole current collection board through hexagon socket head cap screw. The front surface of the anode base is provided with a cable fixing head for fixing a cable, and a copper powder collecting and discharging device is arranged below the anode base and used for sealing the cavity of the anode base.

The invention discloses a special double-rotary workbench for a cradle type short arc composite machining center, which comprises a cradle swing frame and a C-axis moment motor, wherein the cradle swing frame is sequentially matched with an A-axis moment motor, the C-axis moment motor is arranged in the swing frame, and a workbench mounting base, a marble interlayer and a casting workbench with a T-shaped groove are sequentially arranged on the C-axis moment motor. An anode device is arranged in the cradle. The cable enters the cradle from the outside of the machine tool through the cradle swing frame and the hole at the mounting part of the A-axis torque motor, the end of the anode cable is provided with a wiring terminal, and the wiring terminal is tightly attached to the anode collector plate through the hexagon socket head flat round head screw. The current and the voltage with specific waveforms generated by the power supply special for the short arc compound machining center can pass through the cutter special for the short arc compound machining center and the special double-rotary worktable to carry out short arc machining on the workpiece arranged on the worktable. The invention is one of the important components which combine short arc processing and mechanical processing, and the short arc processing and the mechanical processing are combined, thereby obviously improving the processing efficiency, and particularly solving the problem of difficult processing and low efficiency of high-hardness materials. The short electric arc tool electrode is used for machining, so that the loss of a machining cutter is reduced, and the machining cost is reduced.

Drawings

Fig. 1 is a sectional view of a front view of a double-rotary table dedicated to a cradle type short arc hybrid machining center according to an embodiment of the present invention.

Fig. 2 is a bottom cover removing view of the double rotary table dedicated to the cradle type short arc hybrid machining center according to the embodiment of the present invention.

Fig. 3 is a left sectional view of a double rotary table dedicated to a cradle-type short arc hybrid machining center according to an embodiment of the present invention.

The reference numbers in the embodiments of the invention are as follows:

1-cradle swing rack; 2-casting a working platform; 3-marble interlayer; 4-YRT turntable bearing; 5, installing a base on the workbench; 6-sealing cover of working table; 7-anode main shaft; 8-a first hexagon socket screw; 9-a second hexagon socket screw; 10-a third hexagon socket screw; 11-a circular grating fixing flange; 12-fourth hexagon socket screw; 13-a circular grating sealing cover; 14-a cable fixing head; 15-fifth hexagon socket head cap screw; 16-a carbon brush; 17-negative pressure collecting air pipe joint; an 18-V shaped collection tray; 19-a sixth hexagon socket screw; 20-nylon plug; 21-seventh hexagon socket screw; a 22-C axle chassis; 23-eighth hexagon socket screw; 24-a pipe joint; 25-a connecting terminal; 26-a second hexagon socket head cap screw; 27-quick air pipe joint; 28-carbon brush holder; 29-a scroll spring; 30-a half-round square-diameter bolt; 31-ninth hexagon socket head cap screw; 32-an insulating sleeve; a 33-aluminum alloy shielding sleeve; 34-a heat insulation sleeve; 35-anode collector plate; 36-an anode base; 37-tenth hexagon socket head cap screw; 38-absolute value encoder; 39-eleventh hexagon socket screw; 40-rotor attachment flange; 41-twelfth hexagon socket screw; 42-water-cooled transition disk; 43-thirteenth hexagon socket screw; a 44-C shaft torque motor; 45-first hexagon socket head cap screw.

Detailed Description

The technical scheme of the invention is described in detail in the following with reference to the accompanying drawings.

As shown in fig. 1-3, the present embodiment discloses a cradle type double-rotary worktable dedicated for short arc combined machining center, which includes a cradle swing frame 1 installed in cooperation with an a-axis torque motor, a worktable installation base 5 installed on the cradle swing frame 1, a marble interlayer 3 and a casting worktable 2 sequentially assembled on the worktable installation base 5, an anode spindle 7 installed on the casting worktable 2 through a first hexagon socket head cap bolt 8, and a worktable sealing cover 6 installed on the casting worktable through a second hexagon socket head cap bolt 9. The YRT turntable bearing 4 is installed on the cradle swing frame 1 through a twelfth inner hexagon bolt, and the workbench installation base 5 is connected with the inner ring of the YRT turntable bearing 4 through an eleventh inner hexagon bolt. The circular grating fixing flange 11 is installed on the workbench installation base 5 through a third hexagon socket head cap screw 10, and the absolute value encoder 38 is fixed on the circular grating fixing flange 11 through a tenth hexagon socket head cap screw 37. The C-axis chassis 22 is installed at the bottom of the cradle swing frame 1 through an eighth hexagon socket head cap screw 22, and a pipe joint is installed below the C-axis chassis 22. The aluminum alloy shielding sleeve 33 and the heat insulation sleeve 34 are installed on the C-axis base plate 22 through a fifth hexagon socket head cap screw 15, the water-cooling transition plate 42 is installed on the C-axis base plate 22, and the circular grating sealing cover 13 is installed on the water-cooling transition plate 42 through a fourth hexagon socket head cap screw 12. The stator of the C-axis torque motor 44 is arranged on the C-axis chassis 22, the rotor connecting flange 40 is arranged on the rotor of the C-axis torque motor 44 through a thirteenth hexagon socket head cap screw, and the workbench mounting base 5 is matched with the rotor connecting method 40. The anode base 36 and the insulating sleeve 32 are arranged on the bottom ring of the aluminum alloy shielding sleeve 33 through a seventh hexagon socket head cap screw 21 and then sealed through a nylon plugging wire 20, a quick air pipe joint 27 is arranged at the rear of the anode base, an anode collector plate 35 is arranged on the anode base 36 through a sixth hexagon socket head cap screw 19 under the upper panel of the anode base 36, the carbon brush holder 28 is fixed on the anode current collecting plate 35 by the half-round square bolt 30 and the ninth hexagon socket head cap bolt 31 at both sides of the upper plate surface of the anode current collecting plate 35, the carbon brush 16 is installed on the carbon brush holder 28, a scroll spring 29 is arranged on the carbon brush holder 28, the carbon brush 16 is pressed on the anode main shaft 7 through the scroll spring 29, a threaded hole is processed on the lower panel of the anode current collecting plate 35, a terminal 25 is arranged at the end of the anode cable, the terminal 25 is closely attached to the anode current collecting plate 35 by the second hexagon socket head cap screw 26. A cable fixing head 14 is attached to the front surface of the anode base 36 to fix the cable. The U-shaped collecting chassis 18 is additionally arranged below the anode base 36 and is fixed by a first hexagon socket head cap screw 45. A negative pressure collecting air pipe joint 17 is arranged below the U-shaped collecting chassis 18.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. 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

1. A cradle type double-rotary workbench special for a short arc combined machining center is characterized by comprising a cradle swing frame which is installed in a matched mode with an A-axis torque motor, a C-axis chassis is fixed inside the cradle swing frame through hexagon socket head cap bolts, and a C-axis torque motor stator is installed on the C-axis chassis; the workbench mounting base is mounted on a C-axis torque motor rotor through a rotor connecting flange, a YRT turntable bearing is mounted on the workbench mounting base, the inner ring of the YRT turntable bearing is fixed on the workbench mounting base through an inner hexagon bolt, and the outer ring of the bearing is fixed on a cradle swing frame through an inner hexagon bolt; a circular grating fixing flange is installed in the center of the workbench installation base through an inner hexagon bolt, an absolute value encoder is installed on the circular grating fixing flange through the inner hexagon bolt, the absolute value encoder is sealed through a circular grating sealing cover, and a water-cooling transition disc installed on a C-axis base plate is arranged outside the absolute value encoder; a marble interlayer, a casting workbench and an anode main shaft matched with the casting workbench are sequentially assembled above the workbench mounting base; installing an insulating sleeve, a heat insulating sleeve and an aluminum alloy shielding sleeve on a C-axis chassis inside the cradle, and fixing an anode base on a bottom ring of the aluminum alloy shielding sleeve through an inner hexagon bolt; the carbon brush holder is fixed on the anode collector plate through a half-round square bolt and an inner hexagon screw at two sides of the upper plate surface of the anode collector plate, the carbon brush is installed on the carbon brush holder, the carbon brush holder is provided with a volute spring, the carbon brush is tightly pressed on an anode main shaft through the volute spring, a threaded hole is processed on the lower plate of the anode collector plate, a connecting terminal is installed at the end of an anode cable, and the connecting terminal is tightly attached to the anode collector plate through the inner hexagon flat round head screw; the front surface of the anode base is provided with a cable fixing head for fixing the cable, and a copper powder collecting and discharging device is arranged below the anode base and is sealed by a sealing rubber strip and a sealing cover to prevent water and oil from permeating.

2. The special double-rotary workbench for the cradle type short arc compound machining center according to claim 1, wherein the C-axis chassis is fixed on the cradle swing frame through hexagon socket head cap bolts, and a cooling water joint and a hydraulic oil pipe joint are installed at the bottom of the C-axis chassis; an oil way and a water way channel are processed inside the shaft C chassis; install water-cooling transition dish above C axle chassis, the inside processing of water-cooling transition dish has waterway, and the cooling water gets into from C axle chassis, and through water-cooling transition dish from C axle chassis cooling water outlet discharge again to the lathe precision is guaranteed to the cooling absolute value encoder.

3. The cradle type short arc composite machining center dedicated double-rotary table according to claim 1, wherein the casting table is a table machined with a standard T-shaped groove and is installed on a marble interlayer; the marble interlayer material is artificial marble and is arranged on the workbench mounting base; an anode main shaft is arranged in the center of the workbench, and a sealing cover is additionally arranged on the anode main shaft to prevent water and oil from permeating into and corroding the anode main shaft.

4. The cradle type short arc combined machining center special double rotary table according to claim 1, wherein the anode collector plate is mounted on an anode base, the anode base is mounted on an aluminum alloy shielding sleeve base ring, and the aluminum alloy shielding sleeve is fixed on a C-axis base through a hexagon socket head cap screw; the carbon brush holder is fixed on the anode collector plate through hexagon socket screws and half-head square-diameter bolts, the carbon brush is arranged on the carbon brush holder, and the carbon brush is tightly attached to an anode main shaft through a volute spiral spring arranged on the carbon brush holder; and a threaded hole is processed in the lower part of the anode collector plate, a wiring terminal is installed at the end of the anode cable, and the wiring terminal is fixed on the anode collector plate through an inner hexagonal flat head screw.

5. The cradle type double-rotary worktable special for the short-arc combined machining center according to claim 1, wherein the anode base is made of an insulating material and is mounted on an aluminum alloy shielding sleeve base ring through a hexagon socket head cap screw; a cable fixing head is arranged on the front surface of the anode base, and a cable connected with the anode collector plate is fixed on the anode base through the fixing head; a quick air pipe joint is arranged on the back surface of the anode base, and cold air is continuously blown into the inner cavity of the anode base so as to reduce the temperature of the inner cavity; and a sealing rubber strip and a sealing cover are arranged below the anode base, so that the sealing property of the inner cavity of the anode base is ensured.

6. The cradle type short arc combined machining center special-purpose double rotary table according to claim 1, characterized in that the insulating sleeve is made of a material with good insulating property and is located at a position closest to the anode main shaft, the outer layer of the insulating sleeve is an aluminum alloy shielding sleeve, the outer layer of the aluminum alloy shielding sleeve is a heat insulation sleeve made of a heat insulation material, and the machine tool precision is prevented from being influenced by the magnetization of surrounding metal and the temperature rise of the current.

7. The cradle type double-rotary-table special for the short-arc combined machining center according to claim 1, wherein the copper powder collecting and discharging device comprises a V-shaped collecting chassis and a negative-pressure collecting air pipe joint; copper powder generated by the anode main shaft and the carbon brush falls into the V-shaped collecting base plate, and then is discharged through the air pipe by the negative pressure collecting air pipe joint.