Flow-adjustable small water return device for wire cut electric discharge machine

Abstract

The utility model provides a small backwater device with adjustable flow for a wire cut electric discharge machine, which comprises a backwater valve device box body, the top of the backwater valve device box body is fixedly connected with a support beam through a fixing screw, and the bottom of the backwater valve device box body is provided with a first cylinder; the bottom end of a piston rod of the first air cylinder is fixedly connected with a first connecting plate, the top of the first connecting plate is fixedly connected with a first locking nut, and the inner side wall of the first locking nut is in threaded connection with a first connecting piece. The first air cylinder drives the small water return valve and the first sealing plate to move, the small water return valve is opened or closed, the distance between the first sealing plate and the water return valve device box body is adjusted through the adjusting ejector rod, a drainage gap is changed, the water return flow when the small water return valve is opened is basically balanced with the water injection rate during large jet flow machining, and the machining efficiency is improved. The problem of insufficient liquid supply of the clear water tank caused by frequent liquid supply is avoided, and the influence on normal processing caused by continuous rising of the liquid level of the working liquid tank is prevented.

Description

Technical Field

[0001] This utility model relates to a small water return device, and more particularly to an adjustable flow small water return device for an electrical discharge wire cutting machine, belonging to the technical field of electrical discharge wire cutting machines. Background Technology

[0002] An electrical discharge wire cutting machine is a machine tool that uses the principle of electric spark discharge for precision cutting. It uses a thin metal wire as the tool electrode, and a high-frequency pulse power supply generates an instantaneous spark discharge between the electrode wire and the workpiece. The high temperature causes the metal on the workpiece surface to locally melt or vaporize, and the washing action of the working fluid completes the cutting process. Depending on the wire feed speed, electrical discharge wire cutting machines can be divided into two types: high-speed reciprocating wire cutting and low-speed unidirectional wire cutting.

[0003] Wire EDM machines (unidirectional wire feeding type) typically use deionized water as the working fluid for immersion machining. To optimize machining efficiency, the machine tool is equipped with rapid fluid filling and rapid return valves. The working fluid tank of the machine tool has a level sensor, including upper and lower level measuring points, to adjust the fluid level according to the height of the cutting head. The machine tool has three fluid inlets: a rapid filling port, a replenishment port, and nozzles on the upper and lower cutting heads. During the rapid filling phase, the small return valve and the rapid return valve are closed, and fluid is filled simultaneously through the rapid filling port and the replenishment port until the fluid level reaches the upper level measuring point. During machining, working fluid is ejected from the nozzles on the upper and lower cutting heads, and the small return valve is opened to maintain a stable fluid level. When the fluid level drops to the lower level measuring point, the replenishment port begins to replenish fluid until it reaches the upper level measuring point again. The height of the cutting head is determined according to the workpiece thickness and machining process requirements. After machining stops, the working fluid can be quickly discharged into the wastewater tank inside the machine bed by opening the small return valve and the rapid return valve. However, to reduce the machine tool's footprint, the machine tool is designed as an integrated unit, with the interior of the bed serving as part of the working fluid tank. The small return water flow rate needs to be moderate to avoid frequent replenishment and insufficient supply to the clean water tank, while also preventing the working fluid level from continuously rising and affecting normal processing. Therefore, an adjustable flow rate small return water device for wire EDM machines is proposed. Utility Model Content

[0004] In view of this, the present invention provides an adjustable flow rate small return water device for an electrical discharge wire cutting machine to solve or alleviate one of the technical problems existing in the prior art, and at least provides a beneficial option.

[0005] The technical solution of this utility model embodiment is implemented as follows: An adjustable flow small return water device for an electrical discharge wire cutting machine includes a return water valve device housing. A support beam is fixedly connected to the top of the return water valve device housing by fixing screws. A first cylinder is installed at the bottom of the return water valve device housing. A first connecting plate is fixedly connected to the bottom end of the piston rod of the first cylinder. A first connecting piece is threadedly connected to the top of the first connecting plate. A first locking nut is threadedly connected to the outer side wall. A first connecting rod is fixedly connected to the inner side wall of the first connecting piece. A small return water valve is fixedly connected to the upper end of the first connecting rod. A first sealing plate is fixedly connected below the small return water valve. An adjusting rod is threadedly connected to the support beam. A third locking nut is threadedly connected to the adjusting rod.

[0006] A further preferred embodiment: a coarse filter grid is fixedly connected to the top of the return water valve device housing.

[0007] A further preferred embodiment: the return water valve device housing is fixedly connected to the bottom of the working fluid tank bottom plate.

[0008] A further preferred embodiment: the bottom of the return water valve device housing is provided with a small return water outlet.

[0009] A further preferred embodiment: a second cylinder is installed at the bottom of the return water valve device housing.

[0010] A further preferred embodiment: a second connecting plate is fixedly connected to the bottom of the piston rod of the second cylinder.

[0011] A further preferred embodiment: the inner sidewall of the second connecting plate is fixedly connected to a second connecting member.

[0012] A further preferred embodiment: a second connecting rod is fixedly connected to the inner side wall of the second connecting member, a quick return water valve is fixedly installed on the top of the second connecting rod, a second sealing plate is fixedly connected to the quick return water valve, and a quick return water outlet is provided at the bottom of the return water valve device box.

[0013] The present invention has the following advantages due to the adoption of the above technical solution:

[0014] This invention uses a first cylinder to move a small return water valve and a first sealing plate, opening or closing the small return water valve. By adjusting the top rod, the distance between the first sealing plate and the return water valve device box is adjusted, changing the discharge gap. This ensures that the return water flow rate when the small return water valve is open is basically balanced with the water injection volume during large jet processing, avoiding the problem of insufficient liquid supply to the clean water tank caused by frequent liquid replenishment, and preventing the working liquid level from continuously rising and affecting normal processing.

[0015] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural diagram of the present invention;

[0018] Figure 2 This is a cross-sectional view of the present invention.

[0019] Figure 3 This is a BB cross-sectional view of the present invention;

[0020] Figure 4 This is a structural diagram of the internal structure of the return water valve device housing of this utility model.

[0021] Reference numerals: 1. Coarse filter screen; 2. Working fluid tank bottom plate; 3. Fixing screw; 4. Support beam; 5. Return water valve device housing; 6. First cylinder; 7. First connecting plate; 8. First locking nut; 9. First connecting piece; 10. Second locking nut; 11. First connecting rod; 12. First sealing plate; 13. Small return water valve; 14. Third locking nut; 15. Adjusting top rod; 16. Small return water outlet; 17. Second cylinder; 18. Second connecting plate; 19. Second connecting rod; 20. Second sealing plate; 21. Quick return water valve; 22. Quick return water outlet; 23. Second connecting piece. Detailed Implementation

[0022] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0023] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0024] like Figures 1-4As shown, this utility model embodiment provides an adjustable flow small return water device for an electrical discharge wire cutting machine, including a return water valve device housing 5. A support beam 4 is fixedly connected to the top of the return water valve device housing 5 via fixing screws 3. A first cylinder 6 is installed at the bottom of the return water valve device housing 5. A first connecting plate 7 is fixedly connected to the bottom end of the piston rod of the first cylinder 6. A first connecting piece 9 is threadedly connected to the top of the first connecting plate 7. A first locking nut 8 is threadedly connected to the outer side wall of the first connecting piece 9. A second locking nut 8 is fixedly connected to the inner side wall of the first connecting piece 9. A connecting rod 11 is connected to a second locking nut 10 via an external thread. A small return water valve 13 is fixedly connected to the upper end of the first connecting rod 11. A first sealing plate 12 is fixedly connected below the small return water valve 13. An adjusting rod 15 is threadedly connected to the support beam 4. A third locking nut 14 is threadedly connected to the adjusting rod 15. The distance between the first sealing plate 12 and the return water valve device box 5 is adjusted by adjusting the adjusting rod 15, thereby changing the discharge gap so that the return water flow rate when the small return water valve 13 is opened is basically balanced with the water injection volume during large jet processing.

[0025] In this embodiment, specifically: a coarse filter grid 1 is fixedly connected to the top of the return water valve device box 5, and the working fluid is first filtered through the coarse filter grid 1.

[0026] In this embodiment, specifically: the return water valve device box 5 is fixedly connected to the bottom of the working liquid tank bottom plate 2.

[0027] In this embodiment, specifically: a small return water outlet 16 is provided at the bottom of the return water valve device box 5.

[0028] In this embodiment, specifically: a second cylinder 17 is installed at the bottom of the return water valve device box 5, and the second connecting plate 18 is driven by the second cylinder 17.

[0029] In this embodiment, specifically: a second connecting plate 18 is fixedly connected to the bottom of the piston rod of the second cylinder 17.

[0030] In this embodiment, specifically: the inner sidewall of the second connecting plate 18 is fixedly connected to the second connecting member 23, and the movement of the second connecting plate 18 causes the second connecting member 23 to move synchronously.

[0031] In this embodiment, specifically: a second connecting rod 19 is fixedly connected to the inner side wall of the second connecting member 23, a quick return water valve 21 is fixedly connected to the outer side wall of the second connecting rod 19, a second sealing plate 20 is fixedly connected below the quick return water valve 21, and a quick return water outlet 22 is provided at the bottom of the return water valve device box 5. When the quick return water valve 21 is opened, the CNC system of the machine tool controls the second cylinder 17 to drive the second connecting plate 18, the second connecting rod 19 and the second connecting member 23 to move, thereby moving the second sealing plate 20 and the quick return water valve 21 and opening the quick return water outlet 22.

[0032] In operation, the working fluid first passes through the coarse filter plate 1 and enters the return water valve device housing 5. During rapid return water operation, both the small return water valve 13 and the rapid return water valve 21 are open. During machine tool processing, the rapid return water valve 21 is closed, and the small return water valve 13 is open. When the rapid return water valve 21 is open, the CNC system of the machine tool controls the second cylinder 17 to move the second connecting plate 18, the second connecting rod 19, and the second connecting piece 23, thereby moving the second sealing plate 20 and the rapid return water valve 21 to open the rapid return water outlet 22. When the small return water valve 13 is open, the CNC system of the machine tool controls the first cylinder 6 to move the first connecting plate 7, the first connecting piece 9, and the first connecting rod 11, thereby moving the first sealing plate 12 and the small return water valve 13 to open the small return water outlet 16.

[0033] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A small-flow adjustable return water device for an electrical discharge wire cutting machine, comprising a return water valve device housing (5), characterized in that: The top of the return water valve device box (5) is fixedly connected to a support beam (4) by a fixing screw (3). The bottom of the return water valve device box (5) is equipped with a first cylinder (6). The bottom end of the piston rod of the first cylinder (6) is fixedly connected to a first connecting plate (7). The top of the first connecting plate (7) is threadedly connected to a first connecting piece (9). The lower end of the first connecting piece (9) is threadedly connected to a first locking nut (8). The inner side wall of the first connecting piece (9) is fixedly connected to a first connecting rod (11). The lower end of the first connecting rod (11) is threadedly connected to a second locking nut (10). The upper end of the first connecting rod (11) is fixedly connected to a small return water valve (13). The lower part of the small return water valve (13) is fixedly connected to a first sealing plate (12). The support beam (4) is threadedly connected to an adjusting rod (15). The adjusting rod (15) is threadedly connected to a third locking nut (14).

2. The adjustable flow rate small return water device for an electrical discharge wire cutting machine according to claim 1, characterized in that: A coarse filter grid (1) is fixedly connected to the top of the return water valve device box (5).

3. The adjustable flow rate small return water device for an electrical discharge wire cutting machine according to claim 1, characterized in that: The return water valve device housing (5) is fixedly connected to the bottom of the working liquid tank bottom plate (2).

4. The adjustable flow rate small return water device for an electrical discharge wire cutting machine according to claim 1, characterized in that: The bottom of the return water valve device box (5) is provided with a small return water outlet (16).

5. The adjustable flow rate small return water device for an electrical discharge wire cutting machine according to claim 1, characterized in that: The bottom of the return water valve device housing (5) is equipped with a second cylinder (17).

6. The adjustable flow rate small return water device for an electrical discharge wire cutting machine according to claim 5, characterized in that: The bottom of the piston rod of the second cylinder (17) is fixedly connected to a second connecting plate (18).

7. The adjustable flow rate small return water device for an electrical discharge wire cutting machine according to claim 6, characterized in that: The inner sidewall of the second connecting plate (18) is fixedly connected to a second connecting piece (23).

8. The adjustable flow rate small return water device for an electrical discharge wire cutting machine according to claim 7, characterized in that: The inner wall of the second connector (23) is fixedly connected to the second connecting rod (19), the outer wall of the second connecting rod (19) is fixedly connected to the second sealing plate (20), the top of the second sealing plate (20) is fixedly installed with a quick return water valve (21), and the bottom of the return water valve device box (5) is provided with a quick return water outlet (22).

Images