Leak-proof double-layer slide mechanism for submerged wire cut electrical discharge machine tool

Abstract

The application provides an anti-leakage double-layer slide plate mechanism for an immersed wire cut electrical discharge machine tool, which comprises a frame assembly, a first slide plate assembly, a second slide plate assembly and a movement shaft; the first slide plate assembly is slidably installed in the second slide plate assembly, and the second slide plate assembly is slidably installed in the frame assembly; the first slide plate body and the second slide plate body are tightly pressed by a working liquid, so that the dynamic sealing of the first slide plate assembly when sliding left and right in the second slide plate assembly and the dynamic sealing and static sealing of the second slide plate assembly when sliding left and right in the frame assembly or being static are realized; the scheme can obviously reduce the occupied area of the slide plate structure, thereby reducing the volume of the machine tool; and as the double-layer slide plate structure, the double-layer slide plate itself can ensure good sealing performance according to the structure of the double-layer slide plate and the working characteristics during the immersed wire cut electrical discharge machining, without additional cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wire cut electrical discharge machining, and particularly relates to a leakage-proof double-layer sliding plate mechanism for a submerged wire cut electrical discharge machine tool. BACKGROUND

[0002] Wire cut electrical discharge machining is a machining method for machining a corresponding hole on a workpiece by using an electrode wire. In the machining, a pulse power source and a working liquid are applied between the electrode wire and the workpiece, and a controllable electric spark discharge is generated between the electrode wire and the workpiece through relative servo motion between the electrode wire and the workpiece to achieve the goal of removing the workpiece.

[0003] In a wire cut electrical discharge machine tool, there is a submerged wire cut electrical discharge machine tool, and a workpiece is machined by being submerged in a working liquid, and the working liquid is used as an insulating medium for electrical discharge machining. The submerged wire cut electrical discharge machine tool needs to use a special working liquid tank to hold the machining liquid, and a sliding mechanism that allows the moving shaft to move left and right is arranged in the working liquid tank, as shown in FIG. 1. Figure 1 The existing sliding mechanism is a single-layer sliding plate 92 mechanism, which mainly consists of a frame 91, a single-layer sliding plate 92 slidingly installed on the frame 91, and a moving shaft 93 sliding left and right with the single-layer sliding plate 92. Figure 2 The moving position of the single-layer sliding plate 92 mechanism can be referred to FIG. 2, D is the stroke of the moving shaft 93 sliding left and right, K is the length of the single-layer sliding plate 92, when the single-layer sliding plate 92 is located at the middle position O, the left end of the single-layer sliding plate 92 is located at M, and the right end is located at N; when the single-layer sliding plate 92 moves to the limit position M3 to the left, the right end is located at N2, and the moving shaft 93 is located at O2 position; when it moves to the limit position N3 to the right, the left end is located at M2, and the moving shaft 93 is located at O4 position, the space occupied by the single-layer sliding plate 92 is relatively large (M3N3=K+D), which causes the volume of the machine tool to be relatively large.

[0004] In addition, when studying how to solve the problem that the single-layer sliding plate mechanism of the working liquid tank in the submerged wire cut electrical discharge machine tool occupies a relatively large space when moving, thereby causing the volume of the machine tool to be relatively large, the inventor has also found another important problem when trying to use other structures and sliding plate mechanisms, that is, when the sliding mechanism moves left and right or is stationary, machining liquid will leak out of the sliding mechanism. If a sealing mechanism is specially designed for the sliding mechanism to prevent machining liquid from leaking out, one problem is that it will interfere with the operation of the sliding mechanism, and another problem is that it will greatly increase the cost of adding the sealing mechanism and the time and cost of subsequent maintenance and repair.

[0005] Therefore, how to solve the problems of the single-layer slide plate mechanism of the working liquid tank of the existing submerged wire cut electrical discharge machine, such as the large space occupied by the movement of the single-layer slide plate, the large volume of the machine tool, and the leakage of the sliding mechanism, has become the subject to be studied and solved by the present application. SUMMARY

[0006] The present application provides a double-layer slide plate mechanism for preventing leakage of a submerged wire cut electrical discharge machine.

[0007] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: a double-layer slide plate mechanism for preventing leakage of a submerged wire cut electrical discharge machine is provided, the submerged wire cut electrical discharge machine comprises a machining tank for carrying out submerged wire cut electrical discharge machining, and the machining tank has a cavity for injecting machining liquid, and the innovation point thereof is that:

[0008] The double-layer slide plate mechanism comprises a frame assembly, a first slide plate assembly, a second slide plate assembly, and a movement shaft;

[0009] The first slide plate assembly is slidably installed in the second slide plate assembly, and the second slide plate assembly is slidably installed in the frame assembly;

[0010] The first slide plate assembly comprises a first slide plate body, and an axle hole is formed in the middle of the first slide plate body, and the movement shaft is installed in the axle hole;

[0011] The second slide plate assembly comprises a second slide plate body and a second partition plate, two second partition plates are assembled in the middle of two second slide plate bodies, a first stroke hole extending along the left and right sides is formed in the second slide plate body and the second partition plate, and the left and right sides of the first stroke hole are used for limiting the sliding stroke of the first slide plate assembly; and the first slide plate body is slidably installed in a first sliding space formed between the two second partition plates;

[0012] The frame assembly comprises a frame body and a clamping plate, the frame body of the frame assembly is fixed on a slide plate cover, the slide plate cover is fixedly installed on one side of the cavity of the machining tank, two clamping plates are installed on the same side of the frame body, a second stroke hole extending along the left and right sides is formed in the frame body and the clamping plate, and the left and right sides of the second stroke hole are used for limiting the sliding stroke of the second slide plate assembly; and the second slide plate assembly is slidably installed in a second sliding space formed between the two clamping plates;

[0013] The double-layered slide plate mechanism is configured to exert, by the working liquid, a pressure on the first slide plate body towards the second slide plate body second partition plate abutment, a pressure on the second slide plate body towards the frame assembly clamping plate abutment, so that the first slide plate assembly slides left and right within the second slide plate assembly, the dynamic sealing when the second slide plate assembly slides left and right within the frame assembly, and the static sealing when the second slide plate assembly is static.

[0014] The design principle and technical concept of the present application are as follows: firstly, the double-layer slide plate structure is designed to overcome the problem of large space occupied by single-layer slide plate movement, thereby causing the large volume of the machine tool; under the condition that the left and right sliding stroke of the moving shaft is D, the length of the second slide plate assembly is L(K-0.5D), the space M4N4(M4N4=L+0.5D) occupied by the movement of the second slide plate assembly is smaller than the space M3N3(M3N3=K+D) occupied by the movement of the single-layer slide plate, thus saving a length of D, so the space occupied by the double-layer slide plate is smaller than the space occupied by the single-layer slide plate, and the difference is D, therefore, the volume of the machine tool using the double-layer slide plate mechanism is smaller than the volume of the machine tool using the single-layer slide plate mechanism; secondly, the sealing property of the double-layer slide plate structure is specially designed; since the structure and movement matching relationship of the double-layer slide plate structure is more complex than that of the single-layer slide plate structure, the sealing difficulty of the double-layer slide plate is relatively large compared with the single-layer slide plate, and if the corresponding sealing means is not well done, the problem of excessive and rapid leakage of working liquid will occur, in view of this, the second slide plate assembly and the frame assembly are cleverly designed to be sealed, and the working environment of the submerged wire cut electrical discharge machine is utilized, the pressure of the processing liquid injected into the machining groove is used to help sealing, wherein the second slide plate assembly is designed to have a first sliding space formed between two second partition plates, and the first slide plate body is installed in the first sliding space and can slide left and right; the frame assembly is designed to have a second sliding space formed between two clamping plates, and the second slide plate body is installed in the second sliding space and can slide left and right; thus, when processing a workpiece, a certain amount of working liquid is injected into the machining groove, the workpiece is immersed in the working liquid, the working liquid in the machining groove cavity exerts pressure on the first slide plate assembly of the double-layer slide plate mechanism, so that the first slide plate body of the first slide plate assembly tightly contacts the second partition plate in the second slide plate assembly, and dynamic sealing is formed between the first slide plate assembly and the second slide plate assembly when the first slide plate assembly moves left and right; the working liquid in the machining groove cavity also exerts pressure on the second slide plate assembly of the double-layer slide plate mechanism, so that the second slide plate body of the second slide plate assembly tightly contacts the clamping plate in the frame assembly, and dynamic sealing is formed between the second slide plate assembly and the frame assembly when the second slide plate assembly moves left and right; when the first slide plate assembly of the double-layer slide plate mechanism is at rest, the working liquid in the machining groove cavity exerts pressure on the first slide plate assembly, so that the first slide plate body of the first slide plate assembly tightly contacts the second partition plate in the second slide plate assembly, and static sealing is formed between the first slide plate assembly and the second slide plate assembly; when the second slide plate assembly of the double-layer slide plate mechanism is at rest, the working liquid in the machining groove cavity also exerts pressure on the second slide plate assembly, so that the second slide plate body of the second slide plate assembly tightly contacts the clamping plate in the frame assembly, and static sealing is formed between the second slide plate assembly and the frame assembly.

[0015] The relevant contents in the above technical solution are explained as follows:

[0016] 1. In the description of the present application, it is to be understood that the terms "upper", "lower", "vertical", "inner", "outer", "X", "Y", "Z", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0017] 2. In the above scheme, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0018] 3. In the above scheme, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly and specifically limited.

[0019] 4. In the above scheme, the second sliding plate assembly further comprises third and fourth partitions, two third partitions are assembled on the left and right sides of the two second partitions, and two fourth partitions are assembled on the upper and lower sides of the two second partitions, and the first sliding plate body is slidably installed in the first sliding space formed by the second, third and fourth partitions. Thus, the sliding of the first sliding plate body in the first sliding space is smoother and the sealing is better.

[0020] 5. In the above scheme, the thickness of the first sliding plate body is 0.9-1.1mm;

[0021] the thickness of the second sliding plate body is 0.9-1.1mm;

[0022] the thickness of the second partition is 0.9-1.1mm;

[0023] the thickness of the third partition is 1.4-1.6mm;

[0024] the thickness of the fourth partition is 1.4-1.6mm;

[0025] The first sliding plate body and the second partition plate are in clearance fit, and the size of the clearance fit is 0.45-0.55 mm. Thus, reasonable and effective structure size is provided, so that the first sliding plate body slides more smoothly and has better sealing performance in the first sliding space.

[0026] 6. In the above scheme, the frame assembly further comprises a first partition plate, a first pressing plate, a second pressing plate, two rows of the first partition plates are assembled on the upper and lower sides of the two clamping plates, two rows of the first pressing plates are assembled on the left and right sides of the clamping plates on the outer side, and two rows of the second pressing plates are assembled on the upper and lower sides of the clamping plates on the outer side. The second sliding plate assembly is slidably installed in the second sliding space formed by the two clamping plates and the first partition plate. Thus, the second sliding plate assembly slides more smoothly and has better sealing performance in the second sliding space.

[0027] 7. In the above scheme, the thickness of the clamping plate is 0.9-1.1 mm.

[0028] The thickness of the first partition plate is 6.4-6.6 mm.

[0029] The second sliding plate body and the clamping plate are in clearance fit, and the size of the clearance fit is 0.45-0.55 mm. Thus, reasonable and effective structure size is provided, so that the second sliding plate body slides more smoothly and has better sealing performance in the second sliding space.

[0030] 8. In the above scheme, the first sliding plate body is made of stainless steel with a thickness of 1 mm.

[0031] The second sliding plate body is made of stainless steel with a thickness of 1 mm.

[0032] The second partition plate is made of polytetrafluoroethylene with a thickness of 1 mm.

[0033] The third partition plate is made of stainless steel with a thickness of 1.5 mm.

[0034] The fourth partition plate is made of stainless steel with a thickness of 1.5 mm.

[0035] The clamping plate is made of polytetrafluoroethylene with a thickness of 1 mm.

[0036] The first partition plate is made of stainless steel with a thickness of 6.5 mm.

[0037] The first sliding plate body and the second partition plate are in clearance fit when the first sliding plate assembly is installed in the first sliding space, and the size of the clearance fit is 0.5 mm.

[0038] The second sliding plate body and the clamping plate are in clearance fit when the second sliding plate assembly is installed in the second sliding space, and the size of the clearance fit is 0.5 mm.

[0039] The above arrangement uses polytetrafluoroethylene material for the material of the main part of the second partition plate to reduce the friction coefficient and thus reduce the friction force when the first sliding plate body and the second partition plate move relative to each other. The polytetrafluoroethylene material is also used for the material of the main part of the clamping plate to reduce the friction coefficient and thus reduce the friction force when the second sliding plate body and the clamping plate move relative to each other.

[0040] The clearance fit between the first sliding plate assembly and the second sliding plate assembly is designed to be 0.5 mm, and the clearance fit between the second sliding plate assembly and the frame assembly is also designed to be 0.5 mm. If the clearance is less than 0.45 mm, the first sliding plate assembly will be stuck when it moves relative to the second sliding plate assembly, and the second sliding plate assembly will also be stuck when it moves relative to the frame. If the clearance is greater than 0.55 mm, the sealing effect will be poor when the first sliding plate assembly moves relative to the second sliding plate assembly, and the sealing effect will also be poor when the second sliding plate assembly moves relative to the frame assembly.

[0041] 9. In the above scheme, the first partition plate, the third partition plate, and the fourth partition plate are all in a long strip shape; a plurality of the first partition plates are arranged in rows and intervals on the upper and lower sides of the two clamping plates; and a plurality of the second pressing plates are arranged in rows and intervals on the upper and lower sides of the clamping plates on the outer side. This provides good fixing and sealing effects.

[0042] 10. In the above scheme, the first partition plates have partition plate gaps therebetween, and the second pressing plates are arranged to cover the orthographic projection positions of the partition plate gaps in the front and back directions. This further provides good fixing and sealing effects.

[0043] 11. In the above scheme, the second sliding plate assembly is assembled by screws passing through the second sliding plate body, the second partition plate, the third partition plate, the second partition plate, the second sliding plate body in sequence, and by screws passing through the second sliding plate body, the second partition plate, the fourth partition plate, the second partition plate, the second sliding plate body in sequence; and the frame assembly is assembled by screws passing through the frame body, the clamping plate, the first partition plate, the clamping plate, the second pressing plate in sequence, and by screws passing through the frame body, the clamping plate, the first partition plate, the clamping plate, the first pressing plate in sequence.

[0044] 12. In the above scheme, the first ring body is fixedly installed in the shaft hole of the first slide plate body, the second ring body is assembled on the first ring body, the movement shaft is assembled with the shaft hole through the first ring body and the second ring body, and the first ring body or the second ring body abuts against the first limiting portion of the first stroke hole and the second limiting portion of the second stroke hole to constitute the limitation of the sliding stroke of the first slide plate assembly and the sliding stroke of the second slide plate assembly.

[0045] Compared with the prior art, the application has the following advantages and effects due to the use of the above scheme:

[0046] 1. In the above scheme of the application, the problem of large space occupied by single-layer slide plate movement and thus large size of machine tool is overcome. The length of the stroke D of the left and right sliding of the movement shaft is saved compared with the space occupied by single-layer slide plate movement, so the space occupied by double-layer slide plate is smaller than that occupied by single-layer slide plate, and the size of the machine tool using double-layer slide plate mechanism is smaller than that of the machine tool using single-layer slide plate mechanism.

[0047] 2. In the above scheme of the application, the problem of large sealing difficulty of double-layer slide plate structure is overcome. When a workpiece is machined, a certain amount of working liquid is injected into the cavity of the machining groove, and the workpiece is immersed in the working liquid. The working liquid in the machining groove cavity exerts pressure on the first slide plate assembly of the double-layer slide plate mechanism, so that the first slide plate body of the first slide plate assembly tightly abuts against the second partition plate in the second slide plate assembly, and dynamic sealing is formed between the first slide plate assembly and the second slide plate assembly when the first slide plate assembly moves left and right. The working liquid in the machining groove cavity also exerts pressure on the second slide plate assembly of the double-layer slide plate mechanism, so that the second slide plate body of the second slide plate assembly tightly abuts against the clamping plate in the frame assembly, and dynamic sealing is formed between the second slide plate assembly and the frame assembly when the second slide plate assembly moves left and right. When the first slide plate assembly of the double-layer slide plate mechanism is static, the working liquid in the machining groove cavity exerts pressure on the first slide plate assembly, so that the first slide plate body of the first slide plate assembly tightly abuts against the second partition plate in the second slide plate assembly, and static sealing is formed between the first slide plate assembly and the second slide plate assembly. When the second slide plate assembly of the double-layer slide plate mechanism is static, the working liquid in the machining groove cavity also exerts pressure on the second slide plate assembly, so that the second slide plate body of the second slide plate assembly tightly abuts against the clamping plate in the frame assembly, and static sealing is formed between the second slide plate assembly and the frame assembly. Thus, the sealing performance of the double-layer slide plate structure is ensured, and the sealing means is cleverly applied to the structure of the double-layer slide plate itself and the working characteristics during submerged EDM to achieve the sealing together, without increasing the cost of additional equipment, and the subsequent maintenance and repair costs related to the sealing performance can be ignored.

[0048] 3. The above scheme of the present application can obviously reduce the area occupied by the slide plate structure, thereby reducing the volume of the machine tool, and as a double-layer slide plate structure, it can also ensure good sealing performance according to the structure of the double-layer slide plate itself and the working characteristics during submerged electric spark machining, without incurring additional costs. BRIEF DESCRIPTION OF DRAWINGS

[0049] Figure 1 is a schematic view of a single-layer slide plate in the prior art;

[0050] Figure 2 is a motion position diagram of a single-layer slide plate in the prior art;

[0051] Figure 3 is a schematic view of a double-layer slide plate structure in the embodiment of the present application;

[0052] Figure 4 is a schematic view of a first slide plate assembly in the embodiment of the present application;

[0053] Figure 5 is an exploded schematic view of the first slide plate assembly in the embodiment of the present application;

[0054] Figure 6 is a schematic view of a second slide plate assembly in the embodiment of the present application;

[0055] Figure 7 is an exploded schematic view of the second slide plate assembly in the embodiment of the present application;

[0056] Figure 8 is a schematic view of a frame assembly in the embodiment of the present application;

[0057] Figure 9 is an exploded schematic view of the frame in the embodiment of the present application;

[0058] Figure 10 is a motion position diagram of the double-layer slide plate structure in the embodiment of the present application (located at O);

[0059] Figure 11 is a motion position diagram of the double-layer slide plate structure in the embodiment of the present application (located at O2);

[0060] Figure 12 is a motion position diagram of the double-layer slide plate structure in the embodiment of the present application (located at O3);

[0061] Figure 13 is a motion position diagram of the double-layer slide plate structure in the embodiment of the present application (located at O4);

[0062] Figure 14 is a motion position diagram of the double-layer slide plate structure in the embodiment of the present application (located at O5);

[0063] Figure 15 Figure 2 is a schematic view of the double-layered slide plate structure of the embodiment of the present application installed in a machining groove of a machine tool.

[0064] In the above figures:

[0065] 1. frame assembly;

[0066] 101. second stroke hole; 11. frame body; 12. clamping plate; 13. first partition plate; 14. first pressing plate; 15. second pressing plate;

[0067] 2. first slide plate assembly;

[0068] 21. first slide plate body; 211. shaft hole; 22. first ring body; 23. second ring body;

[0069] 3. second slide plate assembly; 301. first stroke hole;

[0070] 31. second slide plate body; 32. second partition plate; 33. third partition plate; 34. fourth partition plate;

[0071] 4. motion shaft;

[0072] 5. machining groove; 51. cavity;

[0073] 6. slide plate cover;

[0074] 91. frame; 92. single-layered slide plate; 93. motion shaft. Embodiment

[0075] The present application will be described in detail below with reference to the drawings and detailed description. Any person skilled in the art, after understanding the embodiments of the present application, can change and modify the technology taught by the present application without departing from the spirit and scope of the present application.

[0076] The present application aims to solve the technical problem that the sliding mechanism in the submerged wire-cut electrical discharge machine tool occupies a large space and also needs to consider the sealing performance.

[0077] To solve the above problems, the design concept of the present application is as follows:

[0078] 1. A double-layer slide structure was designed. With this double-layer slide structure, when the left and right sliding stroke of the motion axis 4 is also D, the length of the second slide assembly 3 is L (K-0.5D). The space occupied by the movement of the second slide assembly 3 is M4N4 (M4N4=L+0.5D), which is equivalent to the space occupied by the movement of the single-layer slide M3N3 (M3N3=K+D), saving a length of D. Therefore, the space occupied by the double-layer slide is smaller than that occupied by the single-layer slide. The difference between the two is D. Therefore, the machine tool with the double-layer slide mechanism is smaller in volume than the machine tool with the single-layer slide mechanism.

[0079] 2. A special design was made for the sealing of the double-layer slide plate structure. Due to the more complex structure and motion coordination of the double-layer slide plate compared to the single-layer slide plate structure, the sealing of the double-layer slide plate is also more difficult than that of the single-layer slide plate. If the corresponding sealing measures are not done well, the leakage of working fluid will be too large and too fast. To address this, both the second slide plate assembly 3 and the frame assembly 1 have been cleverly sealed. The pressure of the processing fluid injected into the processing tank 5 in the working environment of the immersion wire EDM machine tool is used to help with the sealing. The second slide plate assembly 3 is designed to form a first sliding space between the two second partition plates 32, and the first slide plate body 21 can be slidably installed in the first sliding space. The frame assembly 1 is designed to form a second sliding space between the two clamping plates 12, and the second slide plate body 31 can be slidably installed in the second sliding space.

[0080] The following detailed description will be provided with specific examples.

[0081] Embodiment 1 of the present invention proposes a leak-proof double-layer slide mechanism for an immersion wire electrical discharge machining (EDM) machine. The EDM machine includes a machining tank 5 for performing immersion wire EDM, the machining tank 5 having a cavity 51 for injecting machining fluid. The double-layer slide mechanism includes a frame assembly 1, a first slide assembly 2, a second slide assembly 3, and a motion shaft 4. The first slide assembly 2 is slidably mounted left and right within the second slide assembly 3, and the second slide assembly 3 is slidably mounted left and right within the frame assembly 1.

[0082] In a first embodiment of the present invention, the first skateboard assembly 2 includes a first skateboard body 21, the first skateboard body 21 having a shaft hole 211 in the middle, and the motion shaft 4 being installed in the shaft hole 211;

[0083] In the embodiment one of the present application, the second sliding plate assembly 3 comprises a second sliding plate body 31 and two second partition plates 32, the two second partition plates 32 are assembled on the middle of the two second sliding plate bodies 31, the first stroke hole 301 extending along the left and right is arranged on the second sliding plate body 31 and the second partition plate 32, the left and right sides of the first stroke hole 301 are used for limiting the sliding stroke of the first sliding plate assembly 2; the first sliding plate body 21 is slidably installed in the first sliding space formed by the two second partition plates 32.

[0084] In the embodiment one of the present application, the frame assembly 1 comprises a frame body 11 and two clamping plates 12, the frame body 11 of the frame assembly 1 is fixed on the sliding plate cover 6, the sliding plate cover 6 is fixedly installed on one side of the cavity 51 of the processing groove 5, the two clamping plates 12 are installed on the same side of the frame body 11, the second stroke hole 101 extending along the left and right is arranged on the frame body 11 and the clamping plate 12, the left and right sides of the second stroke hole 101 are used for limiting the sliding stroke of the second sliding plate assembly 3; the second sliding plate assembly 3 is slidably installed in the second sliding space formed by the two clamping plates 12;

[0085] In the embodiment one of the present application, the double-layer sliding plate mechanism is configured to: when the working liquid is injected into the cavity 51 of the processing groove 5, the working liquid exerts the pressure on the first sliding plate body 21 towards the second partition plate 32 of the second sliding plate body 31 and exerts the pressure on the second sliding plate body 31 towards the clamping plate 12 of the frame assembly 1, so that the first sliding plate assembly 2 slides left and right in the second sliding plate assembly 3, the dynamic sealing when the second sliding plate assembly 3 slides left and right in the frame assembly 1 and the static sealing when the second sliding plate assembly 3 is static.

[0086] The motion principle of the double-layer sliding plate mechanism of the present application is explained as follows:

[0087] As shown in Figure 10 , the motion shaft 4 starts from the center O position, moves left with the first sliding plate assembly 2 to the center O1 position (as shown in Figure 11 ), continues to move left, drives the second sliding plate assembly 3 to also move left to the center O2 position (as shown in Figure 12 ), and stops moving. The stroke of the motion shaft 4 is 0.5D. The left end limit position of the second sliding plate assembly 3 is M4.

[0088] As shown in Figure 10 , the motion shaft 4 starts from the center O position, moves right with the first sliding plate assembly 2 to the center O3 position (as shown in Figure 13 ), continues to move right, drives the second sliding plate assembly 3 to also move right to the center O4 position (as shown in Figure 14The movement of the moving shaft 4 is stopped. The stroke of the moving shaft 4 is 0.5D. The limit position of the right end of the second slide assembly 3 is N4.

[0089] The stroke of the moving shaft 4 is D (±0.5D).

[0090] The space occupied by the moving range of the double slide assembly is M4N4 (M4N4=L+0.5D).

[0091] Thus, compared with the single slide assembly:

[0092] 1. When the moving range of the moving shaft 4 is D:

[0093] (1) The width of the single slide assembly is MN (MN=K=L+0.5D), the limit position of the left movement of the single slide assembly is M3, and the limit position of the right movement of the single slide assembly is N3 (as shown in Figure 2 ), M3N3=L+1.5D.

[0094] (2) The width of the second slide assembly 3 of the double slide assembly is M0N0 (M0N0=L), the limit position of the left movement of the second slide assembly 3 of the double slide assembly is M4, and the limit position of the right movement of the second slide assembly 3 of the double slide assembly is N4 (as shown in Figure 10 ), M4N4=L+0.5D.

[0095] 2. When the moving range of the moving shaft 4 is D, M4N4

[0096] Therefore, the volume of the machine tool using the double slide assembly is smaller than that of the machine tool using the single slide assembly.

[0097] The sealing principle of the double slide assembly in the machining tank 5 is as follows:

[0098] The machining tank 5 is one of the main components of the submerged wire cut electrical discharge machine tool. When machining a workpiece, a certain amount of working liquid is injected into the cavity 51 of the machining tank 5, and the working liquid can be water, and the workpiece is immersed in water.

[0099] The water in the machining tank 5 cavity 51 exerts pressure on the first sliding plate assembly 2 of the double-layer sliding plate mechanism, so that the first sliding plate body 21 of the first sliding plate assembly 2 is tightly attached to the second partition plate 32 in the second sliding plate assembly 3, and the dynamic seal between the first sliding plate assembly 2 and the second sliding plate assembly 3 is formed when the first sliding plate assembly 2 moves left and right. The water in the machining tank 5 cavity 51 also exerts pressure on the second sliding plate assembly 3 of the double-layer sliding plate mechanism, so that the second sliding plate body 31 of the second sliding plate assembly 3 is tightly attached to the clamping plate 12 in the frame assembly 1, and the dynamic seal between the second sliding plate assembly 3 and the frame assembly 1 is formed when the second sliding plate assembly 3 moves left and right.

[0100] When the first sliding plate assembly 2 of the double-layer sliding plate mechanism is static, the water in the machining tank 5 cavity 51 exerts pressure on the first sliding plate assembly 2, so that the first sliding plate assembly 2 body is tightly attached to the second partition plate 32 in the second sliding plate assembly 3, and the static seal between the first sliding plate assembly 2 and the second sliding plate assembly 3 is formed. When the second sliding plate assembly 3 of the double-layer sliding plate mechanism is static, the water in the machining tank 5 cavity 51 also exerts pressure on the second sliding plate assembly 3, so that the second sliding plate assembly 3 body is tightly attached to the clamping plate 12 in the frame, and the static seal between the second sliding plate assembly 3 and the frame is formed.

[0101] In the second embodiment of the present application, the first sliding plate assembly 2 includes a first sliding plate body 21, a shaft hole 211 is formed in the middle of the first sliding plate body 21, a first ring body 22 is fixedly installed in the shaft hole 211 of the first sliding plate body 21, a second ring body 23 is assembled on the first ring body 22, the movement shaft 4 is assembled with the shaft hole 211 through the first ring body 22 and the second ring body 23, and the first limiting portion of the first stroke hole 301 and the second limiting portion of the second stroke hole 101 are abutted through the first ring body 22 or the second ring body 23, so as to limit the sliding stroke of the first sliding plate assembly 2 and the second sliding plate assembly 3.

[0102] In the second embodiment of the present application, the first sliding plate assembly 2 includes a first sliding plate body 21, a shaft hole 211 is formed in the middle of the first sliding plate body 21, a first ring body 22 is fixedly installed in the shaft hole 211 of the first sliding plate body 21, a second ring body 23 is assembled on the first ring body 22, the movement shaft 4 is assembled with the shaft hole 211 through the first ring body 22 and the second ring body 23, and the first limiting portion of the first stroke hole 301 and the second limiting portion of the second stroke hole 101 are abutted through the first ring body 22 or the second ring body 23, so as to limit the sliding stroke of the first sliding plate assembly 2 and the second sliding plate assembly 3.

[0103] In the second embodiment of the present application, the second sliding plate assembly 3 comprises a second sliding plate body 31, a second partition plate 32, a third partition plate 33 and a fourth partition plate 34, wherein two second partition plates 32 are attached to the middle of two second sliding plate bodies 31, the first stroke hole 301 extending along the left and right sides of the second sliding plate body 31 and the second partition plate 32 is provided, and the left and right sides of the first stroke hole 301 are used to limit the sliding stroke of the first sliding plate assembly 2; the first sliding plate body 21 is slidably installed in the first sliding space formed by the two second partition plates 32. Specifically, two third partition plates 33 are attached to the left and right sides of the two second partition plates 32, and two fourth partition plates 34 are attached to the upper and lower sides of the two second partition plates 32, and the first sliding plate body 21 is slidably installed in the first sliding space formed by the second partition plate 32, the third partition plate 33 and the fourth partition plate 34. Thus, the sliding of the first sliding plate body 21 in the first sliding space is smoother and the sealing is better.

[0104] The frame assembly 1 comprises a frame body 11, a clamping plate 12, a first partition plate 13, a first pressing plate 14 and a second pressing plate 15, wherein the frame body 11 of the frame assembly 1 is fixed on one side of the cavity 51 of the processing tank 5, two clamping plates 12 are installed on the same side of the frame body 11, a second stroke hole 101 extending along the left and right sides of the frame body 11 and the clamping plate 12 is provided, and the left and right sides of the second stroke hole 101 are used to limit the sliding stroke of the second sliding plate assembly 3; the second sliding plate assembly 3 is slidably installed in the second sliding space formed by the two clamping plates 12. Specifically, two rows of first partition plates 13 are attached to the upper and lower sides of the two clamping plates 12, two rows of first pressing plates 14 are attached to the left and right sides of the clamping plates 12 on the outer side, and two rows of second pressing plates 15 are attached to the upper and lower sides of the clamping plates 12 on the outer side, and the second sliding plate assembly 3 is slidably installed in the second sliding space formed by the two clamping plates 12 and the first partition plate 13. Thus, the sliding of the second sliding plate assembly 3 in the second sliding space is smoother and the sealing is better.

[0105] In the second embodiment of the present application, the first partition plate 13, the third partition plate 33 and the fourth partition plate 34 are all in the form of a long strip; a plurality of first partition plates 13 are arranged in rows and intervals on the upper and lower sides of the two clamping plates 12; and a plurality of second pressing plates 15 are arranged in rows and intervals on the upper and lower sides of the clamping plates 12 on the outer side. Thus, good fixing effect and sealing effect are provided.

[0106] In the second embodiment of the present application, the second pressing plate 15 is arranged to cover the projection position of the gap between the partitions in the front-rear direction. Thus, good fixing effect and sealing effect are further provided.

[0107] In the second embodiment of the present application, the second sliding plate assembly 3 is assembled by screws sequentially through the second sliding plate body 31, the second partition 32, the third partition 33, the second partition 32, the second sliding plate body 31, and by screws sequentially through the second sliding plate body 31, the second partition 32, the fourth partition 34, the second partition 32, the second sliding plate body 31; the frame assembly 1 is assembled by screws sequentially through the frame body 11, the clamping plate 12, the first partition 13, the clamping plate 12, the second pressing plate 15, and by screws sequentially through the frame body 11, the clamping plate 12, the first partition 13, the clamping plate 12, the first pressing plate 14.

[0108] In the third embodiment of the present application, other parts of the third embodiment of the present application are the same as those of the first embodiment or the second embodiment, and the difference lies in that the size, material selection and fitting gap of each main part are further improved in the third embodiment of the present application, so as to play a sealing role and make the friction resistance as small as possible.

[0109] In the third embodiment of the present application, the size of the main parts of the double-layer sliding plate mechanism can be selected as follows:

[0110] The thickness of the first sliding plate body 21 ranges from 0.9 to 1.1 mm;

[0111] The thickness of the second sliding plate body 31 ranges from 0.9 to 1.1 mm;

[0112] The thickness of the second partition 32 ranges from 0.9 to 1.1 mm;

[0113] The thickness of the third partition 33 ranges from 1.4 to 1.6 mm;

[0114] The thickness of the fourth partition 34 ranges from 1.4 to 1.6 mm;

[0115] The thickness of the clamping plate 12 ranges from 0.9 to 1.1 mm;

[0116] The thickness of the first partition 13 ranges from 6.4 to 6.6 mm;

[0117] When the first sliding plate assembly 2 is installed in the first sliding space, the first sliding plate body 21 and the second partition 32 are in clearance fit, and the size of the clearance fit therebetween is 0.45-0.55 mm. Thus, reasonable and effective structure size is provided to make the sliding of the first sliding plate body 21 in the first sliding space smoother and the sealing better.

[0118] When the second sliding plate assembly 3 is installed in the second sliding space, the second sliding plate body 31 is in clearance fit with the clamping plate 12, and the size of the clearance fit therebetween is 0.45-0.55 mm. Thus, reasonable and effective structural dimensions are provided to make the second sliding plate body 31 slide more smoothly and seal better in the second sliding space.

[0119] As a further preference, in the third embodiment of the present application, the dimensions and materials of the main parts of the double-layer sliding plate mechanism can be selected as follows:

[0120] The first sliding plate body 21 is made of stainless steel with a thickness of 1 mm;

[0121] The second sliding plate body 31 is made of stainless steel with a thickness of 1 mm;

[0122] The second partition plate 32 is made of polytetrafluoroethylene with a thickness of 1 mm;

[0123] The third partition plate 33 is made of stainless steel with a thickness of 1.5 mm;

[0124] The fourth partition plate 34 is made of stainless steel with a thickness of 1.5 mm;

[0125] The clamping plate 12 is made of polytetrafluoroethylene with a thickness of 1 mm;

[0126] The first partition plate 13 is made of stainless steel with a thickness of 6.5 mm;

[0127] When the first sliding plate assembly 2 is installed in the first sliding space, the first sliding plate body 21 is in clearance fit with the second partition plate 32, and the size of the clearance fit therebetween is 0.5 mm;

[0128] When the second sliding plate assembly 3 is installed in the second sliding space, the second sliding plate body 31 is in clearance fit with the clamping plate 12, and the size of the clearance fit therebetween is 0.5 mm.

[0129] The special design of the double-layer sliding plate mechanism in the third embodiment of the present application is as follows:

[0130] When the double-layer slide plate mechanism moves, it not only plays a sealing role, but also makes the friction resistance as small as possible. In terms of the material of the main part, the second partition plate 32, polytetrafluoroethylene material is adopted to reduce the friction coefficient, thereby reducing the friction force when the first slide plate body 21 of the first slide plate assembly 2 and the second partition plate 32 move relatively. In terms of the material of the main part, the clamp plate 12, polytetrafluoroethylene material is adopted to reduce the friction coefficient, thereby reducing the friction force when the second slide plate body 31 of the second slide plate assembly 3 and the clamp plate 12 move relatively.

[0131] As shown in Figure 3 The cooperation gap between the first slide plate assembly 2 and the second slide plate assembly 3 is designed to be 0.5mm, and the cooperation gap between the second slide plate assembly 3 and the frame is also designed to be 0.5mm. When the gap is less than 0.45mm, the first slide plate assembly 2 will be stuck when moving relative to the second slide plate assembly 3, and the second slide plate assembly 3 will also be stuck when moving relative to the frame. When the gap is greater than 0.55mm, the sealing effect is poor when the first slide plate assembly 2 moves relative to the second slide plate assembly 3, and the sealing effect is also poor when the second slide plate assembly 3 moves relative to the frame.

[0132] Therefore, through the implementation of the above embodiments, the problems of the single-layer slide plate mechanism of the existing immersion wire cut electrical discharge machine tool, such as the large space occupied by the movement of the single-layer slide plate, the large volume of the machine tool, and the leakage of the sliding mechanism, are solved.

[0133] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A leak-proof double-layer sliding plate mechanism for an immersion wire electrical discharge machining (EDM) machine, the EDM machine comprising a machining tank for performing immersion wire EDM, the machining tank having a cavity for injecting machining fluid, characterized in that: The double-layer skateboard mechanism includes a frame assembly, a first skateboard assembly, a second skateboard assembly, and a motion axis; The first skateboard assembly can be slidably installed in the second skateboard assembly, and the second skateboard assembly can be slidably installed in the frame assembly. The first skateboard assembly includes a first skateboard body, with a shaft hole in the middle of the first skateboard body, and the motion shaft is installed in the shaft hole; The second skateboard assembly includes a second skateboard body and a second partition, wherein two second partitions are fitted together in the middle of two second skateboard bodies. The second skateboard body and the second partitions have first stroke holes extending in the left and right directions. The left and right sides of the first stroke holes are used to limit the sliding stroke of the first skateboard assembly. The first skateboard body is slidably installed in the first sliding space formed between the two second partitions, and the first skateboard body and the second partitions are in clearance fit. The second skateboard assembly also includes a third partition and a fourth partition. The two third partitions are fitted together on the left and right sides of the two second partitions, and the two fourth partitions are fitted together on the upper and lower sides of the two second partitions. The first skateboard body is slidably installed in the first sliding space formed by the second partition, the third partition and the fourth partition. The frame assembly includes a frame body and clamping plates. The frame body is fixed to the slide cover, which is fixedly installed on one side of the cavity of the machining groove. Two clamping plates are installed on the same side of the frame body. The frame body and clamping plates have second stroke holes extending left and right. The left and right sides of the second stroke holes are used to limit the sliding stroke of the second slide assembly. The second slide assembly is slidably installed in the second sliding space formed between the two clamping plates. The second slide body and the clamping plates are clearance-fitted. The double-layer slide mechanism is configured such that when working fluid is injected into the cavity of the machining groove, the working fluid applies pressure to the first slide body to press against the second partition plate towards the second slide body, and applies pressure to the second slide body to press against the clamping plate towards the frame assembly, so that the first slide assembly slides left and right within the second slide assembly, and provides dynamic sealing when the second slide assembly slides left and right within the frame assembly, and static sealing when stationary.

2. The anti-leakage double-layer sliding plate mechanism for immersion wire EDM machines according to claim 1, characterized in that: The thickness of the first skateboard body ranges from 0.9 to 1.1 mm; The thickness of the second skateboard body ranges from 0.9 to 1.1 mm; The thickness of the second partition plate ranges from 0.9 to 1.1 mm; The thickness of the third partition ranges from 1.4 to 1.6 mm; The thickness of the fourth partition ranges from 1.4 to 1.6 mm; When the first slide assembly is installed in the first sliding space, the first slide body and the second partition are in clearance fit, and the size of the clearance fit is 0.45 to 0.55 mm.

3. The anti-leakage double-layer sliding plate mechanism for immersion wire EDM machines according to claim 1, characterized in that: The frame assembly also includes a first partition, a first pressure plate, and a second pressure plate. Two rows of first partitions are fitted together on the upper and lower sides between the two clamping plates. Two rows of first pressure plates are fitted together on the left and right sides of the clamping plate located on the outer side. Two rows of second pressure plates are fitted together on the upper and lower sides of the clamping plate located on the outer side. The second sliding plate assembly can be slidably installed in the second sliding space formed by the two clamping plates and the first partition.

4. The anti-leakage double-layer sliding plate mechanism for immersion wire EDM machines according to claim 3, characterized in that: The thickness of the plywood ranges from 0.9 to 1.1 mm; The thickness of the first partition plate ranges from 6.4 to 6.6 mm; When the second slide assembly is installed in the second sliding space, the second slide body and the clamping plate are in clearance fit, and the size of the clearance fit is 0.45 to 0.55 mm.

5. The anti-leakage double-layer sliding plate mechanism for an immersion wire EDM machine tool according to claim 3, characterized in that: The first skateboard body is made of stainless steel with a thickness of 1mm; The second skateboard body is made of stainless steel with a thickness of 1mm; The second partition is made of polytetrafluoroethylene material with a thickness of 1 mm; The third partition is made of stainless steel with a thickness of 1.5 mm. The fourth partition is made of stainless steel with a thickness of 1.5 mm. The plywood is made of polytetrafluoroethylene material with a thickness of 1 mm; The first partition is made of stainless steel with a thickness of 6.5 mm. When the first sliding plate assembly is installed in the first sliding space, the first sliding plate body and the second partition are in clearance fit, and the size of the clearance fit is 0.5mm. When the second slide assembly is installed in the second sliding space, the second slide body and the clamping plate are in clearance fit, and the clearance fit size is 0.5mm.

6. The anti-leakage double-layer sliding plate mechanism for an immersion wire EDM machine tool according to any one of claims 3 to 5, characterized in that: The first, third, and fourth partitions are all long strip structures; multiple first partitions are arranged in rows at intervals on the upper and lower sides between the two clamping plates; multiple second pressure plates are arranged in rows at intervals on the upper and lower sides of the clamping plate located on the outer side.

7. The anti-leakage double-layer sliding plate mechanism for an immersion wire EDM machine tool according to claim 6, characterized in that: The first partitions have a gap between them, and the second pressure plate is arranged to cover the orthographic projection position of the gap in the front and back directions.

8. The anti-leakage double-layer sliding plate mechanism for an immersion wire EDM machine tool according to claim 7, characterized in that: The second skateboard assembly is assembled by passing screws sequentially through the second skateboard body, the second partition, the third partition, the second partition, and the second skateboard body, and by passing screws sequentially through the second skateboard body, the second partition, the fourth partition, the second partition, and the second skateboard body. The frame assembly is formed by screws passing through the frame body, clamping plate, first partition plate, clamping plate, and second pressure plate in sequence.

9. The anti-leakage double-layer sliding plate mechanism for an immersion wire EDM machine tool according to claim 1, characterized in that: A first ring body is fixedly installed in the shaft hole of the first skateboard body, and a second ring body is assembled on the first ring body. The motion shaft is assembled with the shaft hole through the first ring body and the second ring body. The first ring body or the second ring body abuts against the left and right sides of the first stroke hole and the second stroke hole to limit the sliding stroke of the first skateboard assembly and the sliding stroke of the second skateboard assembly.

Images