Pneumatic chuck of spark erosion drilling machine

Abstract

The utility model belongs to the technical field of machining, and particularly relates to a pneumatic chuck of a spark erosion drilling machine, which comprises a gas conveying device, an upper shell, an elastic clamping core, a tightening assembly and a spring, the gas conveying device is connected with the upper shell and used for driving the elastic clamping core to approach the tightening assembly, and the tightening assembly is connected with the upper shell and used for driving the elastic clamping core to be tightened. The elastic clamping core is used for tightening to clamp the copper pipe, and the spring is connected with the upper shell and used for driving the elastic clamping core to reset. The gas conveying device is used for driving the elastic clamping core to push and pull, the elastic clamping core is tightened or loosened by the tightening assembly so as to clamp and release the copper pipe, the driving mode is simple, the transmission path is linear and short, and the copper pipe can be quickly clamped and released. And secondly, the pneumatic chuck of the spark erosion drilling machine only comprises the gas conveying device, the upper shell, the elastic clamping core, the tightening assembly and the spring, the overall structure is simple, and installation and maintenance are convenient.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical processing technology, and specifically relates to a pneumatic chuck for an electrical discharge machining (EDM) machine. Background Technology

[0002] An electrical discharge drilling machine, also known as an electrical discharge hole punch, electrical discharge small hole machine, or electrical discharge fine hole generator, works by using a continuously moving, vertically shifting thin copper metal tube (called an electrode wire) as an electrode to perform pulsed spark discharge on the workpiece to remove metal and form the shape. A pneumatic chuck is required to hold the thin copper metal tube.

[0003] However, current EDM (Electrical Discharge Machining) machine chucks incorporate gears and springs, resulting in a complex overall structure and a long transmission path, which is not conducive to the rapid clamping and release of thin copper tubes. Furthermore, the complex structure of these chucks makes installation and maintenance inconvenient. Therefore, it is necessary to design a pneumatic chuck for EDM machines to solve these problems. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a pneumatic chuck for an electrical discharge machining (EDM) machine, thereby resolving the issues raised in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pneumatic chuck for an EDM drilling machine, comprising a gas delivery device, an upper shell, an elastic core, a tightening assembly, and a spring. The gas delivery device is connected to the upper shell and is used to drive the elastic core closer to the tightening assembly. The tightening assembly is connected to the upper shell and is used to drive the elastic core to tighten. The elastic core is used to tighten to clamp a copper tube. The spring is connected to the upper shell and is used to drive the elastic core to reset.

[0006] Furthermore, the pneumatic chuck of the EDM drilling machine also includes a piston rod, the upper end of which is slidably connected to the upper shell, and the lower end of which is connected to the elastic core.

[0007] Furthermore, the tightening assembly includes a lower shell and a clamping core tightening member. The upper shell is located at the upper end of the lower shell and is threadedly connected to the lower shell. The lower end of the piston rod is slidably connected to the lower shell. The upper end of the spring abuts against the piston rod, and the lower end abuts against the lower shell. The upper end of the elastic clamping core is connected to the piston rod. The clamping core tightening member is connected to the lower shell. The clamping core tightening member has a first tightening hole with a diameter that gradually decreases from top to bottom in the middle. The elastic clamping core is used to pass through the first tightening hole.

[0008] Furthermore, the tightening assembly includes a lower shell, an upper shell located at the upper end of the lower shell and threadedly connected to the lower shell, a piston rod slidably connected to the lower shell at its lower end, a spring at its upper end abutting against the upper shell and at its lower end abutting against the piston rod, and a second tightening hole with a diameter gradually increasing from top to bottom is provided on the lower shell, and the elastic core is used to pass through the second tightening hole.

[0009] Furthermore, the pneumatic chuck of the EDM drilling machine also includes a gas delivery device housing and a main shaft. The upper housing has a first gas channel, which is used to introduce gas to drive the piston rod to move.

[0010] The main shaft passes through and is rotatably connected to the housing of the gas conveying device. The main shaft is located at the upper end of the upper housing and is threadedly connected to the upper housing. A second gas channel is provided on the main shaft. An air inlet and an annular gas groove are provided on the housing of the gas conveying device. The air inlet communicates with the second gas channel through the annular gas groove. The second gas channel communicates with the first gas channel.

[0011] Furthermore, the gas conveying device also includes a first bearing, a second bearing, and a retaining ring. The upper end of the gas conveying device housing has a rotating position, which is used to house the first bearing. The lower end of the gas conveying device housing and the main shaft are arranged from top to bottom as the second bearing and the retaining ring.

[0012] Furthermore, the gas conveying device also includes a first sealing ring and a second sealing ring, the first sealing ring being located above the second sealing ring and both being located between the main shaft and the housing of the gas conveying device, and the first sealing ring and the second sealing ring being located between the first bearing and the second bearing.

[0013] Furthermore, the pneumatic chuck of the EDM drilling machine also includes a third sealing ring, a fourth sealing ring, and a fifth sealing ring. The third sealing ring is provided between the main shaft and the upper housing, the fourth sealing ring is provided between the upper housing and the piston rod, and the fifth sealing ring is provided between the lower housing and the piston rod.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] 1. The gas conveying device drives the elastic clamp to push and pull, so that the tightening component tightens or loosens the elastic clamp to clamp and release the copper tube. The driving method is relatively simple and the transmission path is short, which is conducive to the rapid clamping and release of the copper tube.

[0016] 2. The pneumatic chuck of this EDM drilling machine only includes a gas delivery device, an upper shell, an elastic clamp, a tightening assembly, and a spring. The overall structure is relatively simple and easy to install and maintain.

[0017] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This diagram shows a partial structural schematic of the pneumatic chuck for an EDM drilling machine according to an embodiment of the present invention.

[0020] Figure 2 It shows Figure 1 An exploded structural diagram of some parts of the pneumatic chuck of the China Electric Discharge Machining Machine;

[0021] Figure 3 This diagram shows a partial structural schematic of the pneumatic chuck for an EDM drilling machine according to another embodiment of the present invention.

[0022] Figure 4 It shows Figure 3 An exploded structural diagram of some parts of the pneumatic chuck of the China Electric Discharge Machining Machine;

[0023] Figure 5 A schematic diagram of the gas conveying device according to an embodiment of the present invention is shown;

[0024] Figure 6 An exploded view of the gas delivery device according to an embodiment of the present invention is shown.

[0025] Reference numerals: 1. Upper shell; 11. First gas channel; 2. Elastic core; 31. Lower shell; 32. Core tightening component; 4. Spring; 5. Piston rod; 61. Gas conveying device housing; 611. Air inlet; 612. Annular gas groove; 62. Main shaft; 621. Second gas channel; 63. Second bearing; 64. Snap ring; 65. First sealing ring; 66. Second sealing ring; 71. Third sealing ring; 72. Fourth sealing ring; 73. Fifth sealing ring. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] like Figures 1 to 4 As shown in the figure, a pneumatic chuck for an EDM drilling machine according to an embodiment of the present invention includes a gas delivery device, an upper shell 1, an elastic core 2, a tightening assembly, and a spring 4. The gas delivery device is connected to the upper shell 1 and is used to drive the elastic core 2 to approach the tightening assembly. The tightening assembly is connected to the upper shell 1 and is used to drive the elastic core 2 to tighten. The elastic core 2 is used to tighten to clamp a copper tube. The spring 4 is connected to the upper shell 1 and is used to drive the elastic core 2 to reset.

[0028] In this embodiment, a gas delivery device drives the elastic clamp 2 to move relative to the upper shell 1 until the elastic clamp 2 moves to the tightening component. The tightening component acts on the elastic clamp 2 to tighten it and clamp the copper tube. Next, the spring 4 causes the elastic clamp 2 to reset and move away from the tightening component, thereby opening the elastic clamp 2 to release the copper tube. Thus, by using the gas delivery device to push and pull the elastic clamp 2, the tightening component tightens or loosens the elastic clamp 2 to clamp and release the copper tube. The driving method is relatively simple, the transmission path is short, and it is beneficial for quickly clamping and releasing the copper tube. Furthermore, this pneumatic chuck for the EDM drilling machine only includes a gas delivery device, upper shell 1, elastic clamp 2, tightening component, and spring 4. The overall structure is relatively simple, facilitating installation and maintenance.

[0029] Optionally, such as Figures 1 to 4 As shown, the pneumatic chuck of the EDM drilling machine also includes a piston rod 5, the upper end of which is slidably connected to the upper shell 1, and the lower end of which is connected to the elastic core 2.

[0030] Specifically, a first sliding groove is provided inside the upper shell 1, and the upper end of the piston rod 5 is slidably connected to the first sliding groove.

[0031] In this embodiment, by setting a piston rod 5, the upper end of the piston rod 5 is slidably connected to the upper shell 1, and the lower end of the piston rod 5 is connected to the elastic clamp 2, the movement trajectory of the elastic clamp 2 can be limited, ensuring that the elastic clamp 2 can move accurately to the tightening component, and the movement trajectory is a straight line, which is beneficial to shorten the transmission path and speed up the clamping and releasing speed of the copper tube.

[0032] Optionally, such as Figure 1 and Figure 2 As shown, the tightening assembly includes a lower shell 31 and a clamping tightening member 32. The upper shell 1 is located at the upper end of the lower shell 31 and is threadedly connected to the lower shell 31. The lower end of the piston rod 5 is slidably connected to the lower shell 31. The upper end of the spring 4 abuts against the piston rod 5, and the lower end abuts against the lower shell 31. The upper end of the elastic clamping member 2 is connected to the piston rod 5. The clamping tightening member 32 is connected to the lower shell 31. The clamping tightening member 32 has a first tightening hole with a diameter that gradually decreases from top to bottom in the middle. The elastic clamping member 2 is used to pass through the first tightening hole.

[0033] Specifically, a second sliding groove is provided inside the lower shell 31, and the lower end of the piston rod 5 is slidably connected to the second sliding groove.

[0034] In this embodiment, as the piston rod 5 moves downward, it drives the elastic clamp 2 to move downward and pass through the first tightening hole. The diameter of the first tightening hole gradually decreases from top to bottom, so the tightening effect of the clamping member 32 on the elastic clamp 2 gradually increases, and the clamping force of the elastic clamp 2 on the copper tube also gradually increases, which is beneficial to realize the downward pushing of the elastic clamp 2 to clamp the copper tube.

[0035] Optionally, such as Figure 3 and Figure 4 As shown, the tightening assembly includes a lower shell 31, an upper shell 1 located at the upper end of the lower shell 31 and threadedly connected to the lower shell 31, a piston rod 5 slidably connected to the lower shell 31 at its lower end, a spring 4 abutting against the upper shell 1 at its upper end and against the piston rod 5 at its lower end, and a second tightening hole with a diameter that gradually increases from top to bottom is provided on the lower shell 31, and the elastic core 2 is used to pass through the second tightening hole.

[0036] Specifically, a second sliding groove is provided inside the lower shell 31, and the lower end of the piston rod 5 is slidably connected to the second sliding groove. Secondly, a second tightening hole with a diameter that gradually increases from top to bottom is provided on the lower shell 31, that is, the lower end of the lower shell 31 is made of a sloped surface.

[0037] In this embodiment, as the piston rod 5 moves upward, it drives the elastic clamp 2 to move upward and pass through the second tightening hole. The diameter of the second tightening hole gradually increases from top to bottom, so the tightening effect of the second housing on the elastic clamp 2 gradually increases, and the clamping force of the elastic clamp 2 on the copper tube also gradually increases. This is beneficial to achieve the upward pulling of the elastic clamp 2 to clamp the copper tube, and it can also eliminate the clamping clamp 32, which is beneficial to simplify the overall structure.

[0038] Optionally, such as Figure 2 , Figure 4 , Figure 5 as well as Figure 6As shown, the gas conveying device also includes a gas conveying device housing 61 and a main shaft 62. A first gas channel 11 is provided on the upper housing 1. The first gas channel 11 is used to introduce gas to drive the piston rod 5 to move.

[0039] The main shaft 62 passes through and is rotatably connected to the gas conveying device housing 61. The main shaft 62 is located at the upper end of the upper housing 1 and is threadedly connected to the upper housing 1. A second gas channel 621 is provided on the main shaft 62. An air inlet 611 and an annular gas groove 612 are provided on the gas conveying device housing 61. The air inlet 611 communicates with the second gas channel 621 through the annular gas groove 612. The second gas channel 621 communicates with the first gas channel 11.

[0040] Specifically, the upper shell 1 has a first sliding groove, and the upper end of the piston rod 5 is slidably connected to the first sliding groove; the lower shell 31 has a second sliding groove, and the lower end of the piston rod 5 is slidably connected to the second sliding groove. When the upper end of the spring 4 abuts against the piston rod 5 and the lower end abuts against the lower shell 31, that is, when the spring 4 is located in the first sliding groove, the first gas channel 11 is connected to the first sliding groove, that is, gas can be introduced to drive the piston rod 5 to move downward. When the upper end of the spring 4 abuts against the upper shell 1 and the lower end abuts against the piston rod 5, that is, when the spring 4 is located in the second sliding groove, the first gas channel 11 is connected to the second sliding groove, that is, gas can be introduced to drive the piston rod 5 to move upward. Furthermore, the annular gas groove 612 is a groove with an annular structure.

[0041] In this embodiment, on the one hand, by opening an annular gas groove 612 on the housing 61 of the gas conveying device, after gas is introduced into the air inlet 611, the main shaft 62 can rotate to any angle to allow gas to pass through the annular gas groove 612 into the second gas channel 621. On the other hand, a first gas channel 11 is provided on the upper shell 1 and is connected to the second gas channel 621, so that gas can pass through the second gas channel 621 and the first gas channel 11 in sequence and act on the piston rod 5 to drive the piston rod 5 to move upward or downward.

[0042] Optionally, such as Figure 5 and Figure 6 As shown, the gas conveying device also includes a first bearing, a second bearing 63, and a retaining ring 64. The upper end of the gas conveying device housing 61 has a rotating position, which is used to house the first bearing. The lower end of the gas conveying device housing 61 and the main shaft 62 are arranged from top to bottom between the second bearing 63 and the retaining ring 64.

[0043] In this embodiment, by creating a rotating position on the gas conveying device housing 61 and placing the first bearing within the rotating position, the main shaft 62 and the first bearing of the gas conveying device housing 61 can maintain concentricity, making the first bearing more durable. Secondly, the snap ring 64 is provided to facilitate the limiting of the lower second bearing 63.

[0044] Optionally, such as Figure 5 and Figure 6 As shown, the gas conveying device further includes a first sealing ring 65 and a second sealing ring 66. The first sealing ring 65 is located above the second sealing ring 66, and both are located between the main shaft 62 and the gas conveying device housing 61. The first sealing ring 65 and the second sealing ring 66 are located between the first bearing and the second bearing 63.

[0045] In this embodiment, a first sealing ring 65 and a second sealing ring 66 are provided between the main shaft 62 and the gas delivery device housing 61 to seal the space between them.

[0046] Optionally, such as Figures 1 to 4 As shown, the pneumatic chuck of the EDM drilling machine also includes a third sealing ring 71, a fourth sealing ring 72, and a fifth sealing ring 73. The third sealing ring 71 is provided between the main shaft 62 and the upper shell 1, the fourth sealing ring 72 is provided between the upper shell 1 and the piston rod 5, and the fifth sealing ring 73 is provided between the lower shell 31 and the piston rod 5.

[0047] In this embodiment, a third sealing ring 71 is provided between the main shaft 62 and the upper housing 1 to seal the space between them. A fourth sealing ring 72 is provided between the upper housing 1 and the piston rod 5 to seal the space between them. A fifth sealing ring 73 is provided between the lower housing 31 and the piston rod 5 to seal the space between them.

[0048] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pneumatic chuck for an electrical discharge machining (EDM) machine, characterized in that, The device includes a gas delivery device, an upper shell (1), an elastic clamp (2), a tightening assembly, and a spring (4). The gas delivery device is connected to the upper shell (1) and is used to drive the elastic clamp (2) to approach the tightening assembly. The tightening assembly is connected to the upper shell (1) and is used to drive the elastic clamp (2) to tighten. The elastic clamp (2) is used to tighten to clamp the copper tube. The spring (4) is connected to the upper shell (1) and is used to drive the elastic clamp (2) to reset.

2. The pneumatic chuck for an EDM drilling machine according to claim 1, characterized in that, It also includes a piston rod (5), the upper end of which is slidably connected to the upper shell (1), and the lower end of which is connected to the elastic core (2).

3. The pneumatic chuck for an EDM drilling machine according to claim 2, characterized in that, The tightening assembly includes a lower shell (31) and a clamping tightening member (32). The upper shell (1) is located at the upper end of the lower shell (31) and is threadedly connected to the lower shell (31). The lower end of the piston rod (5) is slidably connected to the lower shell (31). The upper end of the spring (4) abuts against the piston rod (5) and the lower end abuts against the lower shell (31). The upper end of the elastic clamping member (2) is connected to the piston rod (5). The clamping tightening member (32) is connected to the lower shell (31). The clamping tightening member (32) has a first tightening hole with a diameter that gradually decreases from top to bottom in the middle. The elastic clamping member (2) is used to pass through the first tightening hole.

4. The pneumatic chuck for an EDM drilling machine according to claim 2, characterized in that, The tightening assembly includes a lower shell (31), an upper shell (1) located at the upper end of the lower shell (31) and threadedly connected to the lower shell (31), a piston rod (5) slidably connected to the lower shell (31) at its lower end, a spring (4) abutting against the upper shell (1) at its upper end and against the piston rod (5) at its lower end, and a second tightening hole with a diameter that gradually increases from top to bottom is provided on the lower shell (31), and an elastic core (2) is used to pass through the second tightening hole.

5. The pneumatic chuck for an EDM drilling machine according to claim 3 or 4, characterized in that, It also includes a gas delivery device housing (61) and a main shaft (62). The upper housing (1) is provided with a first gas channel (11), which is used to introduce gas to drive the piston rod (5) to move. The main shaft (62) passes through and is rotatably connected to the outer shell (61) of the gas conveying device. The main shaft (62) is located at the upper end of the upper shell (1) and is threadedly connected to the upper shell (1). A second gas channel (621) is provided on the main shaft (62). An air inlet (611) and an annular gas groove (612) are provided on the outer shell (61) of the gas conveying device. The air inlet (611) is connected to the second gas channel (621) through the annular gas groove (612). The second gas channel (621) is connected to the first gas channel (11).

6. The pneumatic chuck for an EDM drilling machine according to claim 5, characterized in that, The gas conveying device further includes a first bearing, a second bearing (63), and a retaining ring (64). The upper end of the gas conveying device housing (61) is provided with a rotating position, which is used to house the first bearing. The lower end of the gas conveying device housing (61) and the main shaft (62) are provided with the second bearing (63) and the retaining ring (64) from top to bottom.

7. The pneumatic chuck for an EDM drilling machine according to claim 6, characterized in that, The gas delivery device further includes a first sealing ring (65) and a second sealing ring (66). The first sealing ring (65) is located above the second sealing ring (66) and both are located between the main shaft (62) and the housing (61) of the gas delivery device. The first sealing ring (65) and the second sealing ring (66) are located between the first bearing and the second bearing (63).

8. The pneumatic chuck for an EDM drilling machine according to claim 7, characterized in that, It also includes a third sealing ring (71), a fourth sealing ring (72) and a fifth sealing ring (73). The third sealing ring (71) is provided between the main shaft (62) and the upper shell (1), the fourth sealing ring (72) is provided between the upper shell (1) and the piston rod (5), and the fifth sealing ring (73) is provided between the lower shell (31) and the piston rod (5).

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