CN220862940U

CN220862940U - Cooling system and electric spark machine

Info

Publication number: CN220862940U
Application number: CN202322582375.0U
Authority: CN
Inventors: 金寒峰
Original assignee: Makino China Co Ltd
Current assignee: Makino China Co Ltd
Priority date: 2023-09-22
Filing date: 2023-09-22
Publication date: 2024-04-30
Anticipated expiration: 2033-09-22

Abstract

The utility model belongs to the technical field of metal processing, and discloses a cooling system and an electric spark machine, wherein the cooling system comprises a processing groove, a processing table, a flow guide channel and a heat exchanger, a first liquid inlet is formed in the bottom wall of the processing groove, and a liquid outlet is formed in the side wall of the processing groove; the processing table is positioned in the processing groove, a liquid cooling channel is arranged in the processing table, the liquid cooling channel comprises a liquid conveying inlet communicated with the first liquid inlet and a plurality of liquid conveying outlets penetrating through the side wall of the processing table, and the liquid conveying outlets are circumferentially arranged along the processing table; the plurality of diversion channels are positioned in the circumferential direction of the processing table and are in one-to-one correspondence connection with the liquid delivery outlets, and the diversion channels can enable dielectric liquid to be injected into the processing groove from bottom to top; the hot fluid outlet of the heat exchanger is connected with the first liquid inlet, the hot fluid inlet of the heat exchanger is communicated with the liquid outlet, and the cooling system can fully mix cooled dielectric liquid with original dielectric liquid in the processing tank, so that the relative consistency of the temperature of each part of the dielectric liquid is improved.

Description

Cooling system and electric spark machine

Technical Field

The utility model relates to the technical field of metal processing, in particular to a cooling system and an electric spark machine.

Background

The electric spark machine is a common processing device used together with numerical control in a machine tool, is different from other machine tools, and is a special processing method for removing conductive materials by utilizing the electric erosion effect generated during pulse discharge between two poles of dielectric liquid (including but not limited to kerosene, deionized water, emulsion and the like), wherein a great deal of heat energy can be concentrated in a discharging micro-channel instantaneously, and the partial trace metal materials on the working surface of the conductive materials are melted and gasified, and the trace metal materials are splashed into the dielectric liquid in an explosive manner to be quickly condensed to form solid metal particles, so that the solid metal particles are driven by the dielectric liquid. Besides being used as a discharge medium, the dielectric liquid also plays roles in cooling, chip removal and the like in the processing process.

At present, an electric spark machine controls the temperature of dielectric liquid by assembling an oil cooling machine, a hot fluid inlet and a hot fluid outlet of the oil cooling machine are directly connected with a processing groove through a conveying pipeline, the dielectric liquid enters the processing groove from an opening arranged at one side of the processing groove, and the temperature of the dielectric liquid is uneven everywhere to influence the processing precision of a workpiece to be processed.

Disclosure of utility model

One of the purposes of the utility model is to provide a cooling system which can fully mix dielectric liquid in a processing groove, improve the relative consistency of the temperature of the dielectric liquid and further improve the processing precision of a workpiece to be processed.

To achieve the purpose, the utility model adopts the following technical scheme:

The cooling system comprises a processing groove, a processing table, a diversion channel and a heat exchanger, wherein a first liquid inlet is formed in the bottom wall of the processing groove, and a liquid outlet is formed in the side wall of the processing groove; the processing table is positioned in the processing groove, a liquid cooling channel is arranged in the processing table, the liquid cooling channel comprises a liquid conveying inlet communicated with the first liquid inlet and a plurality of liquid conveying outlets penetrating through the side wall of the processing table, and the liquid conveying outlets are circumferentially arranged along the processing table; the plurality of diversion channels are positioned in the circumferential direction of the processing table and are in one-to-one correspondence connection with the liquid transmission outlets, and the diversion channels can enable fluid to be injected into the processing groove from bottom to top; the hot fluid outlet of the heat exchanger is connected with the first liquid inlet, and the hot fluid inlet of the heat exchanger is communicated with the liquid outlet.

Preferably, the liquid cooling channel comprises a main flow channel and a plurality of sub-flow channels, one end of the main flow channel vertically penetrates through the bottom of the processing table to form a liquid conveying inlet of the liquid cooling channel, the other end of the main flow channel is communicated with a plurality of horizontally arranged sub-flow channels, and one ends of the sub-flow channels far away from the main flow channel penetrate through the side wall of the processing table to form a plurality of liquid conveying outlets of the liquid cooling channel.

Preferably, the diversion channel comprises a reversing section and a guiding-out section which are connected with each other, the reversing section is connected with the liquid transmission outlet, the guiding-out section is vertically arranged, and the inner diameter of the guiding-out section gradually reduces from bottom to top.

Preferably, the apparatus further comprises a pressure regulating pump provided between the heat exchanger and the processing tank.

Preferably, the device further comprises a filter assembly, wherein the filter assembly is arranged between the liquid outlet of the processing groove and the heat exchanger.

Preferably, the filter assembly comprises a filter barrel, and a filter screen is arranged in the filter barrel.

Preferably, the processing groove comprises an inner wall and an outer wall, an annulus is formed by enclosing the inner wall and the outer wall, and the first liquid inlet and the liquid outlet are both formed in the inner wall.

Preferably, the processing tank is further provided with a second liquid inlet, the second liquid inlet is connected with the hot fluid outlet of the heat exchanger, and the height of the second liquid inlet is the same as that of the liquid outlet.

Preferably, the heat exchanger further comprises a temperature monitoring component for monitoring the temperature of the fluid, the heat exchanger adopts an oil cooler, and the temperature monitoring component is in communication connection with the oil cooler.

Another object of the present utility model is to provide an electric discharge machine comprising a machine tool, a working electrode and any of the above cooling systems, both of which are located on the machine tool.

The utility model has the beneficial effects that: the cooling system and the electric spark machine adopt a mode which is different from the prior dielectric liquid entering the processing tank, the liquid cooling channel is arranged in the processing table, the liquid cooling channel is provided with a plurality of liquid transmission outlets which are arranged along the circumferential direction of the processing table, the cooled dielectric liquid cooled by the heat exchanger can enter the processing tank from the liquid transmission outlets and flow from bottom to top under the action of the flow guide channel, and the cooled dielectric liquid is fully mixed with the original dielectric liquid in the processing tank, so that the relative consistency of the temperature of the dielectric liquid in each part of the processing tank is improved, and the processing precision of a workpiece to be processed is improved.

Drawings

FIG. 1 is a cross-sectional view of a cooling system in one direction in an embodiment of the utility model;

FIG. 2 is a cross-sectional view of the cooling system in another direction in an embodiment of the utility model;

Fig. 3 is an enlarged schematic view of the structure at a in fig. 2.

In the figure:

1. A processing groove; 11. an inner wall; 12. an outer wall; 2. a processing table; 21. a liquid cooling channel; 211. a main flow channel; 212. a sub-runner; 3. a diversion channel; 31. a reversing section; 32. a lead-out section; 4. a filter vat; 5. a heat exchanger.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", etc., azimuth or positional relationship are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description and simplification of operations, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Fig. 1-3 illustrate a cooling system according to an embodiment of the present utility model that is capable of cooling a fluid including, but not limited to, a dielectric fluid. Taking cooling dielectric liquid as an example, the cooling system comprises a processing tank 1, a processing table 2, a flow guide channel 3 and a heat exchanger 5, wherein a first liquid inlet is formed in the bottom wall of the processing tank 1, the first liquid inlet is connected with a hot fluid outlet of the heat exchanger 5, the processing table 2 is arranged at the center of the processing tank 1 and is used for placing a workpiece to be processed, a liquid cooling channel 21 is formed in the processing table 2, the liquid cooling channel 21 comprises a liquid transmission inlet communicated with the first liquid inlet and a plurality of liquid transmission outlets penetrating through the side wall of the processing table 2, the liquid transmission outlets are formed along the circumferential direction of the processing table 2, the flow guide channel 3 is located at the periphery of the processing table 2, the flow guide channels 3 are connected with the liquid transmission outlets in a one-to-one correspondence manner, the flow guide channel 3 can enable the dielectric liquid to be injected into the processing tank 1 from bottom to top, a liquid outlet is formed in the side wall of the processing tank 1, the liquid outlet is higher than the liquid transmission outlet, and the liquid outlet is communicated with the hot fluid inlet of the heat exchanger 5.

The cooling system in this embodiment is provided with a liquid cooling channel 21 inside the processing tank 1, the dielectric liquid cooled by the heat exchanger 5 enters the liquid cooling channel 21 from a first liquid inlet formed at the bottom of the processing tank 1 and is split into a plurality of channels, flows out from the side wall of the processing table 2, and then is flushed into the processing tank 1 along the vertical direction through the diversion channel 3 to form turbulence between the original dielectric liquid in the processing tank 1, so that the original dielectric liquid in the processing tank 1 and the cooling dielectric liquid fed into the processing tank 1 can be fully mixed, the heat exchange efficiency of the original dielectric liquid in the processing tank 1 is improved, and the temperature of each part in the processing tank 1 is kept relatively consistent; moreover, since the cooling dielectric fluid flows through the processing table 2, the workpiece to be processed can be further cooled, and the processing effect can be improved.

Specifically, the liquid cooling channel 21 includes a main channel 211 and a plurality of sub-channels 212, the main channel 211 is vertically arranged at the center of the processing table 2, one end of the main channel penetrating through the bottom of the processing table 2 forms a liquid transmission inlet of the liquid cooling channel 21, the other end is communicated with the sub-channels 212 horizontally arranged, the sub-channels 212 are distributed in the processing table 2 in an annular array, one end of the sub-channel 212 far away from the main channel 211 penetrates through the side wall of the processing table 2 to form a liquid transmission outlet of the liquid cooling channel 21, and the number of the sub-channels 212 can be set according to the size or actual needs of the processing table 2. Illustratively, the sub-flow channels 212 are provided with four channels.

The diversion channel 3 comprises a reversing section 31 and a guiding-out section 32 which are connected with each other, the reversing section 31 is communicated with the diversion channel 212 and is used for changing the direction of the cooled dielectric liquid entering the processing groove 1, so that the dielectric liquid flows and is adjusted to flow along the vertical direction from the horizontal direction, the guiding-out section 32 is vertically arranged, the inner diameter of the guiding-out section 32 is gradually reduced from bottom to top, the flowing speed of the cooled dielectric liquid is accelerated when the cooled dielectric liquid is flushed out of the diversion channel 3, and the cooled dielectric liquid can be fully mixed with the original dielectric liquid. Illustratively, the reversing segment 31 is configured to undulate.

In order to supply the dielectric fluid into the liquid cooling passage 21 from below the processing tank 1, it is necessary to supply a constant water pressure to the dielectric fluid, and on the basis of this, a hydraulic pump is provided between the heat exchanger 5 and the processing tank 1, and the water pressure of the dielectric fluid supplied into the processing tank 1 and thus the circulation speed can be adjusted by adjusting the rotation speed of the hydraulic pump.

During the working process of the electric spark machine, the local trace metal material on the working surface of the workpiece can be splashed into the dielectric liquid in an explosive manner and quickly condensed to form solid metal particles, so that the metal particles in the dielectric liquid are removed in the circulating process of the dielectric liquid, and the metal particles are prevented from accumulating in the processing tank 1. Based on this, the cooling system in the present embodiment further includes a filter assembly disposed between the processing tank 1 and the heat exchanger 5 for filtering out metal particles from the dielectric liquid flowing out of the processing tank 1.

It will be appreciated that the filter assembly may be disposed either between the outlet of the process tank 1 and the heat exchanger 5 or between the first inlet of the process tank 1 and the heat exchanger 5. In this embodiment, the filtering component is disposed between the liquid outlet of the processing tank 1 and the heat exchanger 5, so that the dielectric liquid is filtered before entering the heat exchanger 5, thereby avoiding damage to the heat exchanger 5. Illustratively, the filter assembly includes a filter vat 4, a filter screen is disposed in the filter vat 4, the filter screen is configured as a hollow cylinder with one end open, the liquid outlet is communicated with one end of the filter screen opening, after being filtered by the filter screen, metal particles stay in the filter screen, and the electrolyte flows out of the filter screen into the heat exchanger 5.

Referring to fig. 1 and 2, the processing tank 1 includes an inner wall 11 and an outer wall 12, an annulus is formed by enclosing the inner wall 11 and the outer wall 12, the annulus is communicated with the filter vat 4, a first liquid inlet and a liquid outlet are both formed on the inner wall 11, and then the electrolyte can naturally escape into the annulus through the liquid outlet, and flows into the filter vat 4 from the annulus for filtering. Illustratively, in order to maintain the level of the dielectric fluid in the processing tank 1 at a certain height, a plurality of fluid outlets are provided on the inner wall 11 in the circumferential direction.

The cooled dielectric liquid flows from bottom to top after flowing out of the diversion channel 3, and in the flowing process, metal particles at the bottom of the processing tank 1 are driven to move upwards, in order to reduce the influence of the metal particles on a workpiece, in this embodiment, a second liquid inlet is further arranged on the inner wall 11 of the processing tank 1, the second liquid inlet is also connected with a hot fluid outlet of the heat exchanger 5, and the height of the second liquid inlet is the same as that of the liquid outlet, so that the dielectric liquid entering the processing tank 1 through the second liquid inlet can clamp the original dielectric liquid carrying the metal particles to the liquid outlet, and the metal particles flow out of the processing tank 1 along with the original dielectric liquid. Illustratively, the first liquid inlet is connected with the heat exchanger 5 through a first liquid inlet pipe, the second liquid inlet is connected with the heat exchanger 5 through a second liquid inlet pipe, the second liquid inlet pipe penetrates through the annulus to be connected with the second liquid inlet, and the second liquid inlet pipe and the first liquid inlet pipe are connected with the processing tank 1 through quick connectors.

Optionally, the heat exchanger 5 is an oil cooler, and in order to better control the temperature of the dielectric liquid in the processing tank 1, the cooling system in this embodiment further includes a temperature monitoring component, which is communicatively connected to the oil cooler and is used for monitoring the temperature of the dielectric liquid, and when the temperature of the dielectric liquid is lower than or higher than a preset allowable range, the power of the oil cooler is changed to adjust the heat exchange efficiency. Illustratively, the temperature monitoring assembly comprises a temperature probe disposed inside the process tank 1.

In another embodiment of the present utility model, an electric discharge machine is further provided, where the electric discharge machine includes a machine tool, a working electrode, and the cooling system and the working electrode are both installed on the machine tool, and the first inflow pipe and the second inflow pipe in the cooling system are both located inside the machine tool, so as to reduce damage of the first inflow pipe and the second inflow pipe caused by external force.

The flow of the dielectric fluid in the electric discharge machine comprises two paths, one of which is: the cooled dielectric liquid cooled by the oil cooler enters the diversion channel 3 from the liquid cooling channel 21 in the processing table 2, and is flushed into the processing tank 1 from bottom to top under the reversing action of the diversion channel 3, and is fully mixed with the original dielectric liquid in the processing tank 1, the dielectric liquid above escapes from the processing tank 1 through the liquid outlet, and is filtered by the filter vat 4 and then returns to the oil cooler; the other path is that the dielectric liquid cooled by the oil cooler enters the processing tank 1 from the second liquid inlet through the second liquid inlet pipe, the original dielectric liquid on the upper surface in the processing tank 1 is wrapped and clamped to the liquid outlet and escapes from the processing tank 1, and the dielectric liquid is filtered by the filter vat 4 and then returns to the oil cooler.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. A cooling system, comprising:

The device comprises a processing groove (1), wherein a first liquid inlet is formed in the bottom wall of the processing groove (1), and a liquid outlet is formed in the side wall of the processing groove (1);

The processing table (2) is positioned in the processing groove (1), a liquid cooling channel (21) is arranged in the processing table (2), the liquid cooling channel (21) comprises a liquid conveying inlet communicated with the first liquid inlet and a plurality of liquid conveying outlets penetrating through the side wall of the processing table (2), and the liquid conveying outlets are circumferentially arranged along the processing table (2);

The plurality of flow guide channels (3) are positioned in the circumferential direction of the processing table (2) and correspond to the liquid delivery outlets one by one, the flow guide channels (3) are connected with the liquid delivery outlets, and the flow guide channels (3) can enable fluid to be injected into the processing groove (1) from bottom to top;

And the hot fluid outlet of the heat exchanger (5) is connected with the first liquid inlet, and the hot fluid inlet of the heat exchanger (5) is communicated with the liquid outlet.

2. The cooling system according to claim 1, wherein the liquid cooling channel (21) comprises a main flow channel (211) and a plurality of sub flow channels (212), one end of the main flow channel (211) vertically penetrates through the bottom of the processing table (2) to form a liquid conveying inlet of the liquid cooling channel (21), the other end of the main flow channel (211) is communicated with a plurality of horizontally arranged sub flow channels (212), and one end of the sub flow channels (212) away from the main flow channel (211) penetrates through the side wall of the processing table (2) to form a plurality of liquid conveying outlets of the liquid cooling channel (21).

3. Cooling system according to claim 1, characterized in that the flow guiding channel (3) comprises a reversing section (31) and a guiding-out section (32) which are connected to each other, the reversing section (31) is connected to the liquid transfer outlet, the guiding-out section (32) is arranged vertically, and the inner diameter of the guiding-out section (32) is gradually reduced from bottom to top.

4. The cooling system according to claim 1, further comprising a pressure regulating pump arranged between the heat exchanger (5) and the processing tank (1).

5. The cooling system according to claim 1, further comprising a filter assembly arranged between the outlet of the process tank (1) and the heat exchanger (5).

6. The cooling system according to claim 5, wherein the filter assembly comprises a filter vat (4), the filter vat (4) having a filter screen inside.

7. The cooling system according to claim 1, wherein the processing tank (1) comprises an inner wall (11) and an outer wall (12), an annulus is formed by enclosing between the inner wall (11) and the outer wall (12), and the first liquid inlet and the liquid outlet are both arranged on the inner wall (11).

8. The cooling system according to claim 1, characterized in that a second liquid inlet is also provided on the processing tank (1), which second liquid inlet is connected to the hot fluid outlet of the heat exchanger (5), and which second liquid inlet is at the same height as the liquid outlet.

9. The cooling system according to claim 1, further comprising a temperature monitoring assembly for monitoring the temperature of the fluid, the heat exchanger (5) employing an oil cooler, the temperature monitoring assembly being in communication with the oil cooler.

10. An electric discharge machine comprising a machine tool, a working electrode and a cooling system according to any one of claims 1 to 9, both said cooling system and said working electrode being located on said machine tool.