Copper pipe clamping and conveying device of spark erosion drilling machine

Abstract

The utility model belongs to the technical field of machining, and particularly relates to a copper pipe clamping and conveying device of a spark erosion drilling machine. A taper hole with the diameter gradually reduced from bottom to top is formed in the upper end in the bead tightening sleeve, the steel balls are used for being arranged in the taper hole, and the upper end of the ejector core is inserted into the taper hole and abuts against the steel balls. The magnetic element is used for being connected with the bead tightening sleeve and used for driving the ejector core to move downwards in the vertical direction. The upper end of the spring is connected with the ejector core, and the lower end is connected with the magnetic element. When the copper pipe tends to move upwards, the steel balls can be driven to move upwards in the taper holes, and the copper pipe can be prevented from moving upwards due to the fact that the gaps among the steel balls are reduced. In the downward moving process of the copper pipe, the steel balls can be driven to move downwards in the taper holes, gaps among the steel balls are enlarged, and the copper pipe can be pulled out conveniently. The taper holes can be exactly blocked by the steel balls and the copper pipes, the next copper pipe can be prevented from falling down, and it is guaranteed that only one copper pipe passes through the taper holes.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical processing technology, and specifically relates to a device for clamping copper tubes in an electrical discharge machining (EDM) drilling machine. Background Technology

[0002] Electrical discharge machining (EDM) drilling machines, also known as EDM small hole machines or EDM fine hole discharge machines, work by using a continuously moving, vertically shifting thin copper tube (called an electrode wire) as an electrode to perform pulsed spark discharge on the workpiece to remove metal and form the shape. However, in current EDM drilling machines, when the copper tube is subjected to external force during transport, it may be transported in the opposite direction, affecting the normal transport of the next copper tube. Therefore, it is necessary to design a copper tube clamping device for EDM drilling machines to solve this problem. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a copper tube clamping device for an electrical discharge machining (EDM) machine, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A copper tube clamping device for an electrical discharge machining (EDM) includes a ball sleeve, steel balls, a top core, a spring, and a magnetic element. The upper end of the ball sleeve has a tapered hole with a gradually decreasing diameter from bottom to top. Multiple steel balls are used to be placed in the tapered hole. The upper end of the top core is inserted into the tapered hole and abuts against the multiple steel balls.

[0006] The magnetic element is used to connect with the tight bead sleeve and to drive the top core to move downward in the vertical direction;

[0007] The upper end of the spring is used to connect with the top core, and the lower end of the spring is used to connect with the magnetic element.

[0008] Furthermore, the copper tube clamping device of the EDM drilling machine also includes a magnetic sleeve, with both the upper and lower ends of the magnetic sleeve passing through the magnetic element. The upper end of the magnetic sleeve is detachably connected to the tight bead sleeve, and the lower end of the magnetic sleeve is detachably connected to the magnetic element. The lower end of the top core is slidably connected to the magnetic sleeve.

[0009] Furthermore, the copper tube clamping device of the EDM drilling machine also includes a nut, the upper end of the magnetic sleeve is threadedly connected to the tight ball sleeve, and the lower end of the magnetic sleeve is connected to the magnetic element through the nut.

[0010] Furthermore, the magnetic sleeve is provided with a step, the top core is provided with a limiting sleeve, the top core is fitted with the spring, the lower end of the spring is supported on the step, and the upper end of the spring abuts against the limiting sleeve.

[0011] Furthermore, the copper tube feeding device of the EDM drilling machine also includes a feeding cylinder and a connecting plate. The feeding cylinder is connected to the frame and its output end is connected to the connecting plate for transmission. The magnetic element is connected to the connecting plate.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] 1. The magnetic element drives the top core to move downward, and multiple steel balls move downward in the tapered hole of the tight ball sleeve. The gap between the multiple steel balls widens, allowing the copper tube to fall. The spring releases the elastic force to push the top core upward, and multiple steel balls move upward in the tapered hole. The gap between the multiple steel balls narrows to clamp the copper tube, which is beneficial to realize the function of clamping and pushing out the copper tube.

[0014] 2. When the copper tube tends to move upward, it can drive multiple steel balls to move upward within the tapered hole. The reduced gap between the steel balls can prevent the copper tube from moving upward.

[0015] 3. As the copper tube moves downward, it can drive multiple steel balls to move downward within the tapered hole. The gap between the steel balls widens, making it easier to pull the copper tube out.

[0016] 4. Multiple steel balls and copper tubes can precisely block the tapered hole, which helps prevent the next copper tube from falling down and ensures that only a single copper tube passes through.

[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 A schematic diagram of the structure of the copper tube feeding device for an electrical discharge machining (EDM) according to an embodiment of the present invention is shown.

[0020] Figure 2 An exploded view of the copper tube feeding device of the EDM drilling machine according to an embodiment of the present invention is shown.

[0021] Figure 3A cross-sectional view of the copper tube feeding device of the EDM drilling machine according to an embodiment of the present invention is shown;

[0022] Figure 4 It shows Figure 3 A magnified view of region A in the middle.

[0023] Reference numerals in the attached diagram: 1. Tightening sleeve; 11. Steel ball; 2. Top core; 21. Limiting sleeve; 3. Spring; 4. Magnetic element; 5. Magnetic guide sleeve; 51. Step; 6. Nut; 71. Feeding cylinder; 72. Connecting plate; 8. Mounting plate. Detailed Implementation

[0024] 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.

[0025] like Figures 1 to 4 As shown in the figure, an embodiment of the present invention provides a copper tube clamping device for an electrical discharge machining (EDM) machine, comprising a ball clamping sleeve 1, steel balls 11, a top core 2, a spring 3, and a magnetic element 4. The upper end of the ball clamping sleeve 1 is provided with a tapered hole whose diameter gradually decreases from bottom to top. Multiple steel balls 11 are used to be disposed in the tapered hole. The upper end of the top core 2 is inserted into the tapered hole and abuts against the multiple steel balls 11.

[0026] The magnetic element 4 is used to connect with the tight bead sleeve 1 and to drive the top core 2 to move downward in the vertical direction;

[0027] The upper end of the spring 3 is used to connect with the top core 2, and the lower end of the spring 3 is used to connect with the magnetic element 4.

[0028] Specifically, the middle of the tight bead sleeve 1, the top core 2, and the magnetic element 4 are all provided with a material discharge hole, the axial direction of which is vertical and coaxial with the tapered hole. Secondly, three steel balls 11 are provided. Furthermore, a copper tube feeding device is provided above the tight bead sleeve 1. The copper tube feeding device includes a cylinder containing multiple copper tubes and a funnel for feeding copper tubes one at a time. The copper tubes in the cylinder pass through the funnel and enter the tight bead sleeve 1.

[0029] In this embodiment, when the copper tube is pushed to the position of the tight bead sleeve 1, the spring 3 releases its elastic force to push the top core 2 upward. During the upward movement of the top core 2, multiple steel balls 11 are pushed to the upper end of the tapered hole in the tight bead sleeve 1, causing the multiple steel balls 11 to gather together. At this time, the gap between the multiple steel balls 11 is very small, and the copper tube cannot pass through the gap between the multiple steel balls 11.

[0030] The magnetic element 4 attracts the top core 2, causing the top core 2 to move downwards. Multiple steel balls 11 move downwards along the inclined plane of the tapered hole, widening the gap between the multiple steel balls 11. At this point, the gap between the multiple steel balls 11 is large enough for the copper tube to pass through. Secondly, the downward movement of the top core 2 compresses the spring 3. After the magnetic element 4 releases the top core 2, the spring 3 releases its elastic force, pushing the top core 2 upwards. The multiple steel balls 11 move upwards and converge at the upper end of the tapered hole to clamp the upper end of the copper tube.

[0031] Therefore, the magnetic element 4 drives the top core 2 downward, causing multiple steel balls 11 to move downward within the tapered hole of the ball sleeve 1. The gap between the steel balls 11 widens, allowing the copper tube to fall. Simultaneously, the spring 3 releases its elastic force, pushing the top core 2 upward. The steel balls 11 then move upward within the tapered hole, reducing the gap between them to clamp the copper tube, thus facilitating the copper tube ejection function. Secondly, when the copper tube tends to move upward, it drives the steel balls 11 upward within the tapered hole, and the reduced gap between the steel balls prevents the copper tube from moving upward. Thirdly, during the downward movement of the copper tube, it drives the steel balls 11 downward within the tapered hole, widening the gap between them, making it easier to pull the copper tube out. Furthermore, the steel balls 11 and the copper tube can precisely block the tapered hole, preventing the next copper tube from falling and ensuring that only a single copper tube passes through.

[0032] Optionally, such as Figures 2 to 4 As shown, the copper tube clamping device of the EDM drilling machine also includes a magnetic sleeve 5. Both the upper and lower ends of the magnetic sleeve 5 pass through the magnetic element 4. The upper end of the magnetic sleeve 5 is detachably connected to the tight bead sleeve 1, and the lower end of the magnetic sleeve 5 is detachably connected to the magnetic element 4. The lower end of the top core 2 is slidably connected to the magnetic sleeve 5.

[0033] Specifically, a first sliding groove is provided inside the tight bead sleeve 1, and a second sliding groove is provided on the magnetic sleeve 5. The middle part of the tight bead sleeve 1 is slidably connected to the first sliding groove, and the lower end of the tight bead sleeve 1 is slidably connected to the second sliding groove.

[0034] In this embodiment, by providing the magnetic sleeve 5, the magnetic field generated by the magnetic element 4 can be enhanced and concentrated, which is beneficial to generating sufficient force to drive the top core 2 to move downward in the vertical direction. Secondly, the top core 2 is slidably connected to the magnetic sleeve 5, which can guide the movement trajectory of the top core 2. In addition, the upper end of the magnetic sleeve 5 is detachably connected to the tight bead sleeve 1, and the lower end of the magnetic sleeve 5 is detachably connected to the magnetic element 4, which facilitates the installation and removal of the magnetic sleeve 5.

[0035] Optionally, such as Figure 2 and Figure 3 As shown, the copper tube clamping device of the EDM drilling machine also includes a nut 6. The upper end of the magnetic sleeve 5 is threadedly connected to the tight bead sleeve 1, and the lower end of the magnetic sleeve 5 is connected to the magnetic element 4 through the nut 6.

[0036] In this embodiment, the upper end of the magnetic sleeve 5 is inserted into the first sliding groove opened inside the tight bead sleeve 1, and the outer wall of the upper end of the magnetic sleeve 5 is threadedly connected to the inner wall of the first sliding groove. Next, the nut 6 is sleeved on the lower end of the magnetic sleeve 5 and threadedly connected to the outer wall of the lower end of the magnetic sleeve 5. By tightening the nut 6, the lower end of the magnetic sleeve 5 can be locked to the magnetic element 4.

[0037] Optionally, such as Figure 2 and Figure 4 As shown, the magnetic sleeve 5 is provided with a step 51, the top core 2 is provided with a limiting sleeve 21, the top core 2 is fitted with the spring 3, the lower end of the spring 3 is mounted on the step 51, and the upper end of the spring 3 abuts against the limiting sleeve 21.

[0038] Specifically, the step 51 and the magnetic sleeve 5 are integrally formed.

[0039] In this embodiment, the upper end of the spring 3 abuts against the limiting sleeve 21, and the lower end of the spring 3 abuts against the step 51. The magnetic element 4 drives the top core 2 to move downward. During the downward movement of the top core 2, the limiting sleeve 21 moves downward synchronously, which reduces the distance between the limiting sleeve 21 and the step 51, thus compressing the spring 3. After the magnetic element 4 releases the top core 2, the spring 3 releases its elastic force to push the limiting sleeve 21, causing the top core 2 to move upward, thereby facilitating the reset of the top core 2.

[0040] Optionally, such as Figures 1 to 3 As shown, the copper tube feeding device of the EDM drilling machine also includes a feeding cylinder 71 and a connecting plate 72. The feeding cylinder 71 is connected to the frame and its output end is connected to the connecting plate 72 for transmission. The magnetic element 4 is connected to the connecting plate 72.

[0041] Specifically, the copper tube clamping device of the EDM drilling machine also includes a mounting plate 8, which is connected to the frame. The feeding cylinder 71 is connected to the mounting plate 8. A water stop plug and a pneumatic copper tube clamp are arranged in sequence below the magnetic element 4 on the frame.

[0042] In this embodiment, the feeding cylinder 71 pushes the connecting plate 72 to move downward relative to the frame, and the magnetic element 4 is connected to the connecting plate 72, which can drive the copper tube to push downward, which is beneficial to push the copper tube through the water stop plug until the copper tube is pushed to the pneumatic copper tube clamp.

[0043] 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 device for feeding copper tubes in an electrical discharge machining (EDM) machine, characterized in that, The device includes a ball sleeve (1), steel balls (11), a top core (2), a spring (3), and a magnetic element (4). The ball sleeve (1) has a tapered hole with a gradually decreasing diameter from bottom to top. Multiple steel balls (11) are placed in the tapered hole. The top core (2) is inserted into the tapered hole and abuts against the multiple steel balls (11). The magnetic element (4) is connected to the ball sleeve (1) and is used to drive the top core (2) to move downward in the vertical direction. The upper end of the spring (3) is connected to the top core (2), and the lower end of the spring (3) is connected to the magnetic element (4).

2. The copper tube feeding device for an EDM drilling machine according to claim 1, characterized in that, It also includes a magnetic sleeve (5), the upper and lower ends of which pass through the magnetic element (4). The upper end of the magnetic sleeve (5) is detachably connected to the tight bead sleeve (1), the lower end of the magnetic sleeve (5) is detachably connected to the magnetic element (4), and the lower end of the top core (2) is slidably connected to the magnetic sleeve (5).

3. The copper tube feeding device for an EDM drilling machine according to claim 2, characterized in that, It also includes a nut (6), the upper end of the magnetic sleeve (5) is threadedly connected to the tight bead sleeve (1), and the lower end of the magnetic sleeve (5) is connected to the magnetic element (4) through the nut (6).

4. The copper tube feeding device for an EDM drilling machine according to claim 2, characterized in that, The magnetic sleeve (5) is provided with a step (51), the top core (2) is provided with a limiting sleeve (21), the top core (2) is fitted with the spring (3), the lower end of the spring (3) is mounted on the step (51), and the upper end of the spring (3) abuts against the limiting sleeve (21).

5. The copper tube feeding device for an EDM drilling machine according to claim 1, characterized in that, It also includes a feeding cylinder (71) and a connecting plate (72), wherein the feeding cylinder (71) is connected to the frame and its output end is connected to the connecting plate (72) in a transmission manner, and the magnetic element (4) is connected to the connecting plate (72).

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