Linear cutting machine tool capable of recycling working fluid

Abstract

The utility model discloses a linear cutting machine tool capable of recycling a working solution, relates to the field of linear cutting machine tools, and aims to solve the problem that the filtering efficiency of passive filtering is particularly low when the working solution passes through a filtering plate or a porous filtering layer under the action of gravity. According to the technical scheme, a cylindrical cavity communicated with a collecting opening is formed in a lathe bed, a driving motor is fixedly arranged on the outer wall of the lathe bed, a rotating shaft of the driving motor penetrates into the cylindrical cavity, a porous rotating screen drum is fixedly arranged at the tail end of the driving motor, the rotating screen drum is matched with the cylindrical cavity, and a liquid inlet communicated with the collecting opening is formed in the top wall of the rotating screen drum. And the effects that the working solution can be rapidly discharged under the action of centrifugal force, and the filtering efficiency of the working solution is greatly improved are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of wire cutting machine tools, in particular to a wire cutting machine tool which circulates and recycles working fluid. Background Art

[0002] Wire cutting machine tool processing is a branch of electrospark machining. It is a process method that directly uses electric sparks for processing. It uses a moving wire (electrode wire) as a tool electrode to cut the workpiece, so it is called wire cutting processing. In wire cutting processing, the relative movement of the workpiece and the electrode wire is realized by digital control, so it is also called CNC electrospark wire cutting processing, or wire cutting processing for short.

[0003] The existing wire cutting machine tool working fluid recycling generally uses a collection device to recycle the working fluid, and then uses a filter to filter the working fluid to remove impurities such as metal scraps in the working fluid. Finally, a reflux pump is combined with a reflux pipe to pump the treated working fluid back into the working fluid system for cutting operations to ensure recycling.

[0004] The above-mentioned prior art solutions have the following defects: the transmission fixed filter generally adopts a filter plate or a porous filter layer, and the working fluid passes through the filter plate or the porous filter layer under the action of gravity. The filtration efficiency of passive filtration is particularly low, and the filtration efficiency needs to be further improved. Utility Model Content

[0005] The utility model aims to provide a wire cutting machine tool which can circulate and recycle working fluid.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The invention comprises a bed, wherein a wire cutting assembly for performing cutting operation and a workpiece rack for placing workpieces are fixedly installed on the top wall of the bed, the wire cutting assembly is equipped with a working fluid system, a collecting trough is provided on the top wall of the bed and is located directly below the workpiece rack, a collecting port is provided at the center of the collecting trough, a cylindrical cavity connected to the collecting port is provided inside the bed, a driving motor is fixedly provided on the outer wall of the bed, a rotating shaft of the driving motor penetrates into the cylindrical cavity and a porous rotating screen drum is fixedly provided at the end, the rotating screen drum is arranged to fit the cylindrical cavity, a liquid inlet connected to the collecting port is provided on the top wall of the rotating screen drum, a liquid storage cavity connected to the bottom wall of the cylindrical cavity is provided inside the bed, a reflux pump connected to the liquid storage cavity is fixedly provided on the outer wall of the bed, and the reflux pump is connected to a reflux pipe connected to the working fluid system.

[0008] By adopting the above technical scheme, when working, the wire cutting component performs wire cutting on the workpiece on the workpiece holder, and the working fluid system continuously sprays a sufficient amount of working fluid to assist in cutting. During the cutting process, impurities such as metal debris will be taken away with the flow of the working fluid. The working fluid falls into the collection tank under the action of gravity and flows into the rotating screen drum in the cylindrical cavity from the collection port. Since the rotating screen drum is equipped with a driving motor, the rotating screen drum can be continuously driven to rotate, and the impure working fluid in the rotating screen drum is centrifuged. Under the action of centrifugal force, the working fluid can be quickly discharged. The rotating screen drum can effectively intercept the impurity particles in the working fluid due to its porous structure, and play a good filtering role. The filtered working fluid is temporarily stored in the liquid storage cavity, and then re-enters the working fluid system for secondary utilization through the reflux pump and the reflux pipe, so as to achieve the effect of recycling. The high-speed rotating screen drum has a good rapid liquid discharge effect, which greatly improves the filtering efficiency of the working fluid.

[0009] Furthermore, a concave liquid collecting funnel is fixedly arranged at the center of the collecting tank, the collecting port is opened at the lowest point in the center of the liquid collecting funnel, the liquid collecting funnel is inserted into the liquid inlet and the rotating screen cylinder is arranged at intervals, and the outer edge of the liquid collecting funnel is fixedly covered with a shielding ring on the outer edge of the rotating screen cylinder.

[0010] By adopting the above technical scheme, the concave liquid collecting funnel has a good collecting effect, which can quickly collect the working fluid in the collecting tank and transport it to the rotating screen drum through the collecting port. At the same time, due to the provision of a shielding ring to cover the seam, it can effectively prevent the working fluid from being thrown out from the edge of the screen drum, and the working fluid can be properly handled in a comprehensive manner to avoid the waste of working fluid during the treatment process.

[0011] Furthermore, the reflux pump is connected and installed in the upper position of the liquid storage cavity.

[0012] By adopting the above technical scheme, the liquid storage cavity has a certain depth. Since the reflux pump is located in the upper middle part of the liquid storage cavity, the working fluid at the bottom of the liquid storage cavity is in a relatively stable state and the impurities in the working fluid are mainly metal scraps with a high density and are easy to sink to the bottom, which is convenient for secondary precipitation of the working fluid after filtration, thereby further reducing the impurity content in the working fluid.

[0013] Furthermore, a plurality of scraping strips that abut against the inner wall of the cylindrical cavity are fixedly arranged on the outer wall of the rotating screen drum, and the scraping strips are in the form of co-directional spirals.

[0014] By adopting the above technical solution, on the one hand, a number of spiral scrapers can resist the fixed rotating screen drum and limit the range of movement of the rotating screen drum to stabilize the rotating screen drum; on the other hand, the scrapers can continuously scrape the inner wall of the cylindrical cavity to continuously squeeze the attached droplets and flow downward for transportation, further increasing the discharge rate of the working fluid and achieving the effect of improving the reflux efficiency of the working fluid.

[0015] Furthermore, the driving motor and the reflux pump are provided with an external power supply and a control system.

[0016] By adopting the above technical solution, the control system can be a PLC or a single-chip microcomputer, which can cooperate with sensors such as flow meters and liquid level meters to adaptively adjust the power of the drive motor and the reflux pump according to the working fluid flow to achieve the effect of intelligent adaptive adjustment.

[0017] In summary, the beneficial technical effects of the utility model are:

[0018] 1. The rotating screen drum and driving motor are used, so that the working fluid can be discharged quickly under the action of centrifugal force, which greatly improves the filtering efficiency of the working fluid;

[0019] 2. The liquid collecting funnel and shielding ring are used to comprehensively and properly handle the working fluid and avoid the waste of working fluid during the treatment process;

[0020] 3. The reflux pump is installed in the upper middle part of the liquid storage cavity, which makes it easier for the working fluid to settle again after filtration, further reducing the impurity content in the working fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification, but do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 It is a schematic diagram of the overall structure of the bed in the utility model;

[0024] Figure 3 It is a schematic cross-sectional view of the overall structure of the bed in the utility model;

[0025] Figure 4 yes Figure 3 Enlarged schematic diagram of the structure of part A in the middle.

[0026] In the figure, 1. bed; 2. wire cutting assembly; 3. workpiece rack; 4. collecting tank; 41. liquid collecting funnel; 411. shielding ring; 42. collecting port; 43. cylindrical cavity; 44. driving motor; 5. rotating screen drum; 51. liquid inlet; 6. liquid storage cavity; 7. reflux pump; 71. reflux pipe; 8. scraper. DETAILED DESCRIPTION

[0027] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-4 , the utility model provides a technical solution:

[0030] The invention comprises a bed 1, wherein a wire cutting assembly 2 for cutting operation and a workpiece rack 3 for placing workpieces are fixedly installed on the top wall of the bed 1, the wire cutting assembly 2 is equipped with a working fluid system, a collecting tank 4 is provided on the top wall of the bed 1 and is located directly below the workpiece rack 3, a collecting port 42 is provided at the center of the collecting tank 4, a cylindrical cavity 43 connected to the collecting port 42 is provided inside the bed 1, a driving motor 44 is fixedly provided on the outer wall of the bed 1, a rotating shaft of the driving motor 44 penetrates into the cylindrical cavity 43 and a porous rotating screen drum 5 is fixedly provided at the end, the rotating screen drum 5 is arranged in accordance with the cylindrical cavity 43, a liquid inlet 51 connected to the collecting port 42 is provided on the top wall of the rotating screen drum 5, a liquid storage cavity 6 connected to the bottom wall of the cylindrical cavity 43 is provided inside the bed 1, a reflux pump 7 connected to the liquid storage cavity 6 is fixedly provided on the outer wall of the bed 1, the reflux pump 7 is connected to a reflux pipe 71 connected to the working fluid system, when working, the wire cutting assembly 2 The workpiece on the workpiece is subjected to wire cutting, and the working fluid system continuously sprays a sufficient amount of working fluid to assist in cutting. During the cutting process, impurities such as metal debris will be carried away with the flow of the working fluid. The working fluid falls into the collecting tank 4 under the action of gravity, and flows into the rotating screen drum 5 in the cylindrical cavity 43 from the collecting port 42. Since the rotating screen drum 5 is equipped with a driving motor 44, the rotating screen drum 5 can be continuously driven to rotate, and the impure working fluid in the rotating screen drum 5 is centrifuged. Under the action of centrifugal force, the working fluid can be quickly discharged. The rotating screen drum 5 can effectively intercept the impurity particles in the working fluid due to its porous structure, and play a good filtering role. The filtered working fluid is temporarily stored in the liquid storage cavity 6, and then re-enters the working fluid system for secondary utilization through the transportation of the reflux pump 7 and the reflux pipe 71, so as to achieve the effect of recycling. The high-speed rotating screen drum 5 has a good rapid liquid discharge effect, which greatly improves the filtering efficiency of the working fluid.

[0031] A concave liquid collecting funnel 41 is fixedly arranged at the center of the collecting tank 4, and a collecting port 42 is opened at the lowest point in the center of the liquid collecting funnel 41. The liquid collecting funnel 41 penetrates the liquid inlet 51 and is arranged with a rotating screen drum 5 at intervals. The outer edge of the liquid collecting funnel 41 is fixedly covered with a shielding ring 411 on the outer edge of the rotating screen drum 5. The concave liquid collecting funnel 41 has a good collecting effect and can quickly collect the working fluid in the collecting tank 4 and transport it to the rotating screen drum 5 through the collecting port 42. At the same time, due to the provision of a shielding ring 411 to cover the joint, the working fluid can be effectively prevented from being thrown out from the edge of the screen drum, so that the working fluid can be properly handled in a comprehensive manner to avoid the waste of working fluid during the treatment process.

[0032] The reflux pump 7 is connected and installed in the upper middle position of the liquid storage cavity 6. The liquid storage cavity 6 has a certain depth. Since the reflux pump 7 is located in the upper middle position of the liquid storage cavity 6, the working fluid at the bottom of the liquid storage cavity 6 is in a relatively stable state and the impurities in the working fluid are mainly metal scraps with a high density and are easy to sink to the bottom, which is convenient for secondary precipitation of the working fluid after filtration, thereby further reducing the impurity content in the working fluid.

[0033] The outer wall of the rotating screen drum 5 is fixedly provided with a plurality of scraper bars 8 that abut against the inner wall of the cylindrical cavity 43. The scraper bars 8 are spirally oriented in the same direction. On the one hand, the plurality of spiral scraper bars 8 can abut against the fixed rotating screen drum 5 to limit the range of movement of the rotating screen drum 5 to stabilize the rotating screen drum 5. On the other hand, the scraper bars 8 can continuously scrape the inner wall of the cylindrical cavity 43 to continuously squeeze the attached droplets and flows downward for transportation, further increasing the discharge rate of the working fluid and achieving the effect of improving the reflux efficiency of the working fluid.

[0034] The driving motor 44 and the reflux pump 7 are provided with an external power supply and a control system. The control system may be a PLC or a single chip microcomputer. In conjunction with sensors such as a flow meter and a liquid level meter, the power of the driving motor 44 and the reflux pump 7 may be adaptively adjusted according to the flow of the working fluid to achieve an intelligent adaptive adjustment effect.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A wire cutting machine tool for recycling working fluid, comprising a bed (1), characterized in that: A wire cutting assembly (2) for cutting and a workpiece rack (3) for placing workpieces are fixedly mounted on the top wall of the bed (1); the wire cutting assembly (2) is provided with a working fluid system; a collecting tank (4) is provided on the top wall of the bed (1) and is located directly below the workpiece rack (3); a collecting port (42) is provided at the center of the collecting tank (4); a cylindrical cavity (43) connected to the collecting port (42) is provided inside the bed (1); a driving motor (44) is fixedly mounted on the outer wall of the bed (1); the driving motor (44) rotates The shaft penetrates into the cylindrical cavity (43) and a porous rotating screen drum (5) is fixedly arranged at the end thereof. The rotating screen drum (5) is arranged to fit the cylindrical cavity (43). The top wall of the rotating screen drum (5) is provided with a liquid inlet (51) connected to the collecting port (42). The inside of the bed (1) is provided with a liquid storage cavity (6) connected to the bottom wall of the cylindrical cavity (43). The outer wall of the bed (1) is fixedly provided with a reflux pump (7) connected to the liquid storage cavity (6). The reflux pump (7) is connected to a reflux pipe (71) connected to a working fluid system.

2. A wire cutting machine tool for recycling and utilizing working fluid according to claim 1, characterized in that: The center of the collecting tank (4) is fixedly provided with an inwardly concave liquid collecting funnel (41); the collecting port (42) is opened at the lowest point in the center of the liquid collecting funnel (41); the liquid collecting funnel (41) penetrates the liquid inlet (51) and is arranged to be spaced apart from the rotating screen drum (5); the outer edge of the liquid collecting funnel (41) is fixedly covered with a shielding ring (411) which covers the outer edge of the rotating screen drum (5).

3. The wire cutting machine tool for recycling and utilizing working fluid according to claim 2, characterized in that: The reflux pump (7) is connected and installed in the upper middle position of the liquid storage cavity (6).

4. The wire cutting machine tool for recycling and utilizing working fluid according to claim 3, characterized in that: The outer wall of the rotating screen drum (5) is fixedly provided with a plurality of scraping strips (8) that abut against the inner wall of the cylindrical cavity (43), and the scraping strips (8) are in the form of co-directional spirals.

5. The wire cutting machine tool for recycling and utilizing working fluid according to claim 4, characterized in that: The driving motor (44) and the reflux pump (7) are externally connected to a power supply and a control system.

Images