CN110773827A - A lift oil groove and discharge machine for discharge machining - Google Patents
A lift oil groove and discharge machine for discharge machining Download PDFInfo
- Publication number
- CN110773827A CN110773827A CN201911214492.3A CN201911214492A CN110773827A CN 110773827 A CN110773827 A CN 110773827A CN 201911214492 A CN201911214492 A CN 201911214492A CN 110773827 A CN110773827 A CN 110773827A
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- oil
- lifting
- lift
- axis motion
- oil tank
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
- B23H1/10—Supply or regeneration of working media
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
The invention provides a lifting oil tank for electric discharge machining, which has reasonable structure, the electric discharge machining oil in the oil tank can synchronously lift with the oil tank without waiting for oil drainage and oil inlet time, thereby not only improving the convenience of operators, but also reducing the time consumed by operation, the lifting oil tank comprises a workbench on a base, the periphery of the workbench is provided with the lifting oil tank, a lifting mechanism can drive the lifting oil tank to move up and down, the lifting oil tank comprises a jacket, the jacket is provided with an oil inlet, the lifting oil tank is provided with an overflow inlet, the discharge oil enters the jacket from the oil inlet and then overflows from the overflow inlet into the lifting oil tank, the inner side surface of the lifting oil tank is also provided with an overflow outlet, the workbench rises in the lifting oil tank along with the descending of the lifting oil tank and can discharge the discharge oil in the lifting oil tank through the overflow outlet, the rear side of the base is provided with, the oil tank passes through pipe connection oil inlet and overflow export, in addition, still provides the discharge machine who adopts this lift oil groove.
Description
Technical Field
The invention relates to the technical field of discharge machines, in particular to a lifting oil groove for discharge machining and a discharge machine.
Background
The oil groove of the discharge processing machine can be used for oil immersion discharge processing in the processing process, cooling and removing waste residues in the processing process, after the processing is finished, the discharge processing oil must be discharged, and the upper die and the lower die can be opened manually, generally, the design of a manual front opening door is adopted, but in an automatic processing system, the lifting of the oil groove must be automatically controlled, the upper die and the lower die can be automatically opened through a mechanical arm, and a reliable automatic lifting device is needed.
At present, the more mature automatic lifting device is represented by swiss and japan equipment, and how to make a reliable and good oil tank becomes one of the key technologies for providing an automatic system, however, the oil tank lifting structure in these prior arts is limited by the design of its space structure, and there are several disadvantages to be improved.
The automatic oil discharging and oil feeding device is also a more critical place in time efficiency of the automatic oil discharging and oil feeding process and a place which is difficult to overcome in the design of the existing lifting oil tank, and meanwhile, the self characteristic of the discharging oil can cause the hardening of a rubber product oil seal, the leakage problem is also considered, and the automatic lifting oil tank device is considered.
Disclosure of Invention
In order to solve the problems, the invention provides a lifting oil tank for electric discharge machining, and simultaneously provides an electric discharge machine adopting the lifting oil tank, the electric discharge machine is reasonable in structure, electric discharge machining oil in the oil tank can be lifted synchronously with the oil tank, oil drainage and oil inlet time does not need to be waited, convenience of an operator is improved, and time consumed by operation can be reduced.
The technical scheme is as follows: the utility model provides a lift oil groove for electric discharge machining, its includes the base, the front end of base sets up the workstation, the lift oil groove has been arranged to the periphery of workstation, correspond in the lift oil groove the workstation is equipped with lets a position, its characterized in that: the lifting oil groove is installed on the lifting mechanism, the lifting mechanism can drive the lifting oil groove to move up and down, the lifting oil groove comprises a jacket, an oil inlet is formed in the jacket, an overflow inlet is formed in the inner side face of the lifting oil groove, discharging oil enters the jacket from the oil inlet, the overflow inlet overflows and enters the lifting oil groove, an overflow outlet is further formed in the inner side face of the lifting oil groove, the lifting oil groove descends, the workbench is lifted in the lifting oil groove and can discharge the discharging oil in the lifting oil groove through the overflow outlet, an oil tank is arranged on the rear side of the base and connected with an oil pump, and the oil tank is connected with the oil inlet and the overflow outlet through pipelines.
Further, the workstation is including fixing dabber on the base, the marble workstation is installed through the workstation fixed plate to the upper end of dabber.
Further, elevating system includes ball screw, ball screw is connected with servo motor, be fixed with the connecting plate on ball screw's the screw nut, the connecting plate with the lift cylinder keysets is connected, correspond on the lift cylinder keysets the dabber is equipped with the dabber groove, the lift oil groove installation on the lift cylinder keysets, the lower extreme of lift cylinder keysets is provided with dabber leak protection ring, elevating system still includes the straight line track, be provided with on the straight line track rail sliding fit's slider, the slider with the connecting plate is connected.
Furthermore, be provided with twice sealing member on the dabber leak protection ring with the dabber is sealed to be cooperated, the sealing member adopts polytetrafluoroethylene to make.
Further, still set up the lift oil groove pneumatic cylinder on the base, install lift oil groove pneumatic cylinder support on the piston rod of lift oil groove pneumatic cylinder, lift oil groove pneumatic cylinder support with the lift cylinder keysets is connected.
Furthermore, the rear side of oil tank is provided with oil feed filter and oil outlet filter, the oil feed filter with be provided with respectively on the oil outlet filter and filter the entry and filter the export, the oil pump includes oil feed pump and oil outlet pump, the oil feed pump sends the discharge oil pump in the oil tank to the filtration entry of oil feed filter through the pipeline, discharge oil warp the oil feed filter filters follow the filtration export of oil feed filter is discharged, then sends into through the pipeline the oil inlet, follows the discharge oil that the overflow export was discharged sends to through the pipeline the filtration entry of oil outlet filter, the filtration entry of oil outlet filter pass through the pipeline with the oil outlet pump is connected, the oil outlet pump will pass through the discharge oil pump that the oil outlet filter filters is sent back to in the oil tank.
Furthermore, an oil receiving chassis is arranged on the base and below the lifting oil groove.
The utility model provides an electric discharge machine, its characterized in that includes foretell lift oil groove that is used for discharge machining, the rear end of base is provided with well seat, install multiaxis motion on the well seat, install the processing subassembly on the multiaxis motion, multiaxis motion can drive the processing subassembly moves in three-dimensional space.
Further, the multi-axis movement mechanism comprises an X-axis movement assembly, a y-axis movement assembly and a z-axis movement assembly, the X-axis movement assembly is arranged on the middle seat, the y-axis movement assembly is arranged on the X-axis movement assembly, the z-axis movement assembly is fixed on the y-axis movement assembly, the machining assembly is arranged on the z-axis movement assembly, the X-axis movement assembly and the y-axis movement assembly are matched to enable the machining assembly to move in a plane parallel to the base, the z-axis movement assembly enables the machining assembly to move to a machining position, and the X-axis movement assembly and the y-axis movement assembly are matched to enable the machining assembly to move in a plane parallel to the workbench.
Furthermore, the x-axis motion assembly, the y-axis motion assembly and the z-axis motion assembly respectively comprise linear modules, and each linear module comprises a ball screw, a linear guide rail and a servo motor.
The lifting oil tank for electric discharge machining of the invention drives the oil tank to lift by arranging the lifting mechanism on the base, the oil tank is connected with the oil tank and the oil pump, when the lifting oil tank lifts, the oil pump pumps the electric discharge machining oil into a jacket of the oil tank, the electric discharge machining oil enters the lifting oil tank from an overflow inlet on the lifting oil tank and is kept in the lifting oil tank, when the lifting oil tank descends, the workbench positioned in the lifting oil tank is relatively lifted from the lifting oil tank, the workbench is lifted in the lifting oil tank to discharge the discharge oil in the lifting oil tank through the overflow outlet, the discharge machining oil returns to the oil tank through the pipeline, the device can control the height of the liquid level of the rapid lifting oil tank and the height of the liquid level of the electric discharge machining oil, has the functions of ascending and descending the oil tank and simultaneously ascending and descending the liquid level of the electric discharge machining oil, and can keep the electric discharge machining oil in the oil tank, wherein the ascending liquid level of the oil tank is the upper part, and the descending liquid level of the oil tank is the lower part; need not wait for draining and oil feed time, not only promote operator's convenience, also can reduce the time that the operation consumes, elevating system adopts ball screw cooperation AC servo motor, the linear track of collocation, and the lifting accuracy is high, has still set up pneumatic cylinder cooperation lift oil groove pneumatic cylinder support simultaneously and has driven the lift oil groove, and the transmission is safe rapidly.
Drawings
FIG. 1 is a schematic view of a base, a table and a lifting mechanism of the present invention;
FIG. 2 is a schematic front view of the base, the worktable and the elevating mechanism of the present invention;
FIG. 3 is a cross-sectional view taken along line R-R of FIG. 2;
FIG. 4 is a schematic view of a first view of the oil sump;
FIG. 5 is a schematic view of a first view of the oil sump elevation;
FIG. 6 is a schematic top view of the elevating oil sump;
FIG. 7 is a cross-sectional view taken along the line S-S of FIG. 6;
FIG. 8 is a schematic top view of the lift tank for electrical discharge machining of the present invention with the tank removed;
FIG. 9 is a cross-sectional view taken along line T-T of FIG. 8;
FIG. 10 is a schematic view of the discharge machine of the present invention when the lift sump is lowered;
FIG. 11 is a schematic diagram of the discharge machine of the present invention when the lift sump is raised;
FIG. 12 is a schematic view of another perspective of the discharge machine of the present invention;
fig. 13 is a schematic view of the discharge machine of the present invention with the housing removed and the oil sump lifted.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1 to 9, the lifting oil tank for electric discharge machining of the present invention includes a base 1, a workbench 2 is disposed at the front end of the base 1, a lifting oil tank 3 is disposed at the periphery of the workbench, a relief 301 is disposed in the lifting oil tank 3 corresponding to the workbench 2, the lifting oil tank 3 is mounted on a lifting mechanism 5, the lifting mechanism 5 can drive the lifting oil tank 3 to move up and down, the lifting oil tank 3 includes a jacket 302, an oil inlet 303 is disposed on the jacket 302, an overflow inlet 304 is disposed on the inner side surface of the lifting oil tank 3, discharge oil enters the jacket 302 from the oil inlet 303 and overflows from the overflow inlet 304 into the lifting oil tank, an overflow outlet 305 is further disposed on the inner side surface of the lifting oil tank 3, the workbench 2 is lifted in the lifting oil tank 3 along with the lowering of the lifting oil tank 3 and can discharge oil in the lifting oil tank 3 through the overflow outlet, an oil tank 4, the oil tank 4 is connected with an oil pump, and the oil tank 4 is connected with the oil inlet 303 and the overflow outlet 305 through a pipeline 5.
Specifically, in the present embodiment, the worktable 2 includes a mandrel 201 fixed on the base 1, and a marble worktable 203 is installed on the upper end of the mandrel 201 through a worktable fixing plate 202.
In this embodiment, be provided with twice sealing member 701 on the dabber leak protection ring 7 and seal up with dabber 201 and cooperate, sealing member 701 adopts polytetrafluoroethylene to make, adopts polytetrafluoroethylene as the sealing member, and the lubricity is good, anti chemical properties is good, effectively reduces the seepage problem, possesses double-deck sealing member simultaneously, protects more in place durable.
In this embodiment, still set up lift oil groove pneumatic cylinder 9 on base 1, install lift oil groove pneumatic cylinder support 10 on lift oil groove pneumatic cylinder 9's the piston rod, lift oil groove pneumatic cylinder support 10 is connected with lift cylinder keysets 6, on base 1, the below that is located lift oil groove 3 is provided with and connects oily chassis, and the oil groove bottom of going up and down is reserved and is connect oily chassis, even the oil blanket oozes oil for a long time, also need not worry that the discharge machining oil oozes.
Since impurities are mixed in the electrical discharge machining oil after electrical discharge machining, in one embodiment of the present invention, an oil inlet filter 11 and an oil outlet filter 12 are disposed at the rear side of the oil tank 4, the oil inlet filter 11 includes a filtering inlet 1101 and a filtering outlet 1102, the oil outlet filter 12 is respectively provided with a filtering inlet 1201 and a filtering outlet 1202, the oil pump includes an oil inlet pump 13 and an oil outlet pump 14, the oil inlet pump 13 pumps the electrical discharge oil in the oil tank 4 to the filtering inlet 1101 of the oil inlet filter 11 through a pipeline, the electrical discharge oil is filtered by the oil inlet filter 11 and discharged from the filtering outlet 1102 of the oil inlet filter and then sent to the oil inlet 303 through a pipeline, the discharge oil enters the lifting oil tank for electrical discharge machining, after use, the electrical discharge oil discharged from the overflow outlet 305 is sent to the filtering inlet 1201 of the oil outlet filter through a pipeline, and the filtering inlet 1202 of the oil outlet filter is connected to the oil outlet pump 14 through, the discharge oil pump 14 can pump the discharge oil filtered by the discharge oil filter 12 back into the oil tank 4.
In fig. 8 and 9, the direction of the arrow from a to K schematically shows the flow direction of the electric discharge machining oil in one complete work flow, and the work flow of the oil lifting groove for electric discharge machining in the above embodiment is described as follows: when electric discharge machining is needed, the lifting oil cylinder rises under the driving of the lifting mechanism, meanwhile, the oil inlet pump pumps the electric discharge oil in the oil tank to the filtering inlet of the oil inlet filter through a pipeline, the electric discharge oil is filtered by the oil inlet filter, then is discharged from the filtering outlet of the oil inlet filter, is conveyed into the oil inlet through the pipeline, then enters the jacket of the lifting oil tank from the oil inlet, along with pumping, the electric discharge machining oil level in the jacket is continuously lifted, the electric discharge machining oil enters the lifting oil tank from the overflow inlet on the lifting oil tank until the electric discharge machining oil level in the lifting oil tank meets the machining requirements, then electric discharge machining can be carried out, after the machining is finished, when the lifting oil tank descends, the workbench in the lifting oil tank is relatively lifted from the lifting oil tank, the workbench is lifted in the lifting oil tank, and the electric discharge oil in the lifting oil tank can be discharged through, the electric discharge machining oil flows to a filtering inlet of an oil outlet filter through a pipeline, is filtered in the oil outlet filter, and then is returned to the oil tank under the pumping of an oil outlet pump.
The lifting oil tank for electric discharge machining can control the height of the liquid level of the quick lifting oil tank and the height of the liquid level of electric discharge machining oil, has the functions of ascending and descending the oil tank and ascending and descending the liquid level of the electric discharge machining oil simultaneously, and can keep the electric discharge machining oil in the oil tank, wherein the ascending liquid level of the oil tank is the upper part, and the descending liquid level of the oil tank is the lower part; need not wait for draining and oil feed time, not only promote operator's convenience, also can reduce the time that the operation consumes, elevating system adopts ball screw cooperation AC servo motor, the linear track of collocation, the lifting accuracy is high, pneumatic cylinder cooperation lift oil groove pneumatic cylinder support has still been set up simultaneously and has been driven the lift oil groove, the transmission is safe rapidly, in addition, the workstation is fixed and is kept motionless on the base, it is the hydro-cylinder to go up and down, can ensure that the position of workstation is unchangeable, thereby the processing benchmark is unchangeable, can ensure discharge machining's precision.
Referring to fig. 1 to 13, an embodiment of the present invention further provides an electric discharge machine, which includes the above-mentioned lifting oil tank for electric discharge machining, and further includes a middle seat 8 disposed at the rear end of the base, the middle seat 8 is provided with a multi-axis movement mechanism, the multi-axis movement mechanism is provided with a machining assembly, and the multi-axis movement mechanism can drive the machining assembly to move in a three-dimensional space.
Specifically, the multi-axis movement mechanism includes an X-axis movement assembly 15, a y-axis movement assembly 16, and a z-axis movement assembly 17, in this embodiment, the X-axis direction is in the length direction of the base, the y-axis direction is in the width direction of the base, the z-axis direction is in the height direction of the base, the X-axis movement assembly 15 is disposed on the middle base 8, the y-axis movement assembly 16 is disposed on the X-axis movement assembly 15, the z-axis movement assembly 17 is fixed on the y-axis movement assembly 16, the processing assembly is mounted on the z-axis movement assembly 17, the X-axis movement assembly 15 and the y-axis movement assembly 16 cooperate to enable the processing assembly to move in a plane parallel to the worktable on the base, the z-axis movement assembly 17 enables the processing assembly to move to a processing position, the X-axis movement assembly 15, the y-axis movement assembly 16, and the z-axis movement assembly 17 respectively include linear modules, and each, Linear guide, servo motor.
The whole part of the electric discharge machine is immersed in the lifting oil tank during machining, so that the liquid level of the machining oil body of the oil tank body is kept stable, and the machining assembly is driven by the multi-shaft motion mechanism, so that the machining assembly can continuously and stably machine workpieces, and can keep high-precision machining of the workpieces.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The utility model provides a lift oil groove for electric discharge machining, its includes the base, the front end of base sets up the workstation, the lift oil groove has been arranged to the periphery of workstation, correspond in the lift oil groove the workstation is equipped with lets a position, its characterized in that: the lifting oil groove is installed on the lifting mechanism, the lifting mechanism can drive the lifting oil groove to move up and down, the lifting oil groove comprises a jacket, an oil inlet is formed in the jacket, an overflow inlet is formed in the inner side face of the lifting oil groove, discharging oil enters the jacket from the oil inlet, the overflow inlet overflows and enters the lifting oil groove, an overflow outlet is further formed in the inner side face of the lifting oil groove, the lifting oil groove descends, the workbench is lifted in the lifting oil groove and can discharge the discharging oil in the lifting oil groove through the overflow outlet, an oil tank is arranged on the rear side of the base and connected with an oil pump, and the oil tank is connected with the oil inlet and the overflow outlet through pipelines.
2. A lift sump for electrical discharge machining according to claim 1, wherein: the workstation is including fixing dabber on the base, the marble workstation is installed through the workstation fixed plate to the upper end of dabber.
3. A lift sump for electrical discharge machining according to claim 2, wherein: elevating system includes ball screw, ball screw is connected with servo motor, be fixed with the connecting plate on ball screw's the screw nut, the connecting plate with the lift cylinder keysets is connected, correspond on the lift cylinder keysets the dabber is equipped with the dabber groove, the installation of lift oil groove on the lift cylinder keysets, the lower extreme of lift cylinder keysets is provided with dabber leak protection ring, elevating system still includes the straight line track, be provided with on the straight line track sliding fit's slider, the slider with the connecting plate is connected.
4. A lift sump for electrical discharge machining according to claim 3, wherein: the mandrel leakage-proof ring is provided with two sealing pieces which are in sealing fit with the mandrel, and the sealing pieces are made of polytetrafluoroethylene.
5. A lift sump for electrical discharge machining according to claim 3, wherein: still set up the lift oil groove pneumatic cylinder on the base, install lift oil groove pneumatic cylinder support on the piston rod of lift oil groove pneumatic cylinder, lift oil groove pneumatic cylinder support with the lift cylinder keysets is connected.
6. A lift sump for electrical discharge machining according to claim 1, wherein: the rear side of oil tank is provided with oil feed filter and the filter of producing oil, the oil feed filter with be provided with respectively on the filter of producing oil and filter the entry and filter the export, the oil pump is including oil feed pump and oil pump, oil feed pump sends the oil pump that discharges in the oil tank to through the pipeline the filtration entry of oil feed filter, discharge oil warp the oil feed filter filters the follow the filtration export discharge of oil feed filter then sends into through the pipeline the oil inlet, follows overflow export exhaust discharge oil is sent to through the pipeline the filtration entry of oil filter, the filtration entry of oil filter pass through the pipeline with the oil pump that produces oil is connected, the oil pump that produces oil will pass through the oil pump that discharges that the filter of oil filter filters is sent back to in the oil tank.
7. A lift sump for electrical discharge machining according to claim 1, wherein: an oil receiving chassis is arranged on the base and below the lifting oil groove.
8. An electric discharge machine characterized by: the oil groove for electric discharge machining comprises the lifting oil groove for electric discharge machining according to claim 1, wherein a middle seat is arranged at the rear end of the base, a multi-axis motion mechanism is mounted on the middle seat, a machining assembly is mounted on the multi-axis motion mechanism, and the multi-axis motion mechanism can drive the machining assembly to move in a three-dimensional space.
9. An electric discharge machine according to claim 8, characterized in that: the multi-axis motion mechanism comprises an X-axis motion assembly, a y-axis motion assembly and a z-axis motion assembly, wherein the X-axis motion assembly is arranged on the middle seat, the y-axis motion assembly is arranged on the X-axis motion assembly, the z-axis motion assembly is fixed on the y-axis motion assembly, the machining assembly is arranged on the z-axis motion assembly, the X-axis motion assembly and the y-axis motion assembly are matched to enable the machining assembly to move in a plane parallel to the base, the z-axis motion assembly enables the machining assembly to move to a machining position, and the X-axis motion assembly and the y-axis motion assembly are matched to enable the machining assembly to move in a plane parallel to the workbench.
10. An electric discharge machine according to claim 9, characterized in that: the X-axis motion assembly, the Y-axis motion assembly and the Z-axis motion assembly respectively comprise linear modules, and each linear module comprises a ball screw, a linear guide rail and a servo motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911214492.3A CN110773827A (en) | 2019-12-02 | 2019-12-02 | A lift oil groove and discharge machine for discharge machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911214492.3A CN110773827A (en) | 2019-12-02 | 2019-12-02 | A lift oil groove and discharge machine for discharge machining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110773827A true CN110773827A (en) | 2020-02-11 |
Family
ID=69393515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911214492.3A Pending CN110773827A (en) | 2019-12-02 | 2019-12-02 | A lift oil groove and discharge machine for discharge machining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110773827A (en) |
-
2019
- 2019-12-02 CN CN201911214492.3A patent/CN110773827A/en active Pending
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