Electric discharge machining jig with self-locking

Abstract

This utility model relates to the technical field of spark plug processing devices, and in particular to an EDM fixture with self-locking. It includes a base with a placement frame connected to its top. The placement frame is I-shaped, with round rods connected to both ends of its outer sidewalls. Screw holes are formed on one end of the placement frame's sidewalls, and first sliding holes are formed on the other two end sidewalls. The round rods are located outside the first sliding holes, and a main screw is threaded into the screw holes. When a component is placed between limiting members, rotating the main screw causes the supporting member to drive the limiting members to clamp the component. The limiting member structure allows for better contact between the limiting members and the component surface, thereby achieving a stable clamping effect.

Description

Technical Field

[0001] This utility model relates to the technical field of spark plug processing devices, specifically to an electrical discharge machining fixture with a self-locking mechanism. Background Technology

[0002] Electrical discharge machining (EDM) is a method of machining a workpiece by means of pulsed discharge between a tool electrode and a workpiece electrode in a specific medium. During machining, one pole of the pulse power supply is connected to the tool electrode, and the other pole is connected to the workpiece electrode. Both poles are immersed in a liquid medium with a certain degree of insulation (commonly kerosene, mineral oil, or deionized water). When a pulse voltage is applied between the two poles, it breaks down the liquid medium at the closest point between the poles under the given conditions, forming a discharge channel.

[0003] Existing EDM positioning equipment lacks a fixing structure for parts of different sizes and shapes, making it inconvenient to clamp and fix parts of different shapes, thus affecting normal processing. While patent CN223028655U discloses an EDM part positioning fixture that can fix parts of different shapes, this patent uses multiple thin rods that fit against the surface of the parts to fix them. However, these rods are connected by springs, and even under the pressure of the screw, the springs themselves can still expand and contract, resulting in unstable clamping of the parts. The most important issue to address in fixing devices is the stability of spark plug parts. Therefore, a self-locking EDM fixture is needed to ensure stable clamping of spark plug parts of different shapes.

[0004] This invention proposes an EDM fixture with a self-locking mechanism to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a self-locking electrical discharge machining fixture.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an electrical discharge machining fixture with self-locking, comprising a base with a placement frame connected to the top, the placement frame being an I-shaped frame, round rods connected to both ends of the outer sidewall of the placement frame, screw holes being provided on one end sidewall of the placement frame, and first sliding holes being provided on the other end sidewall of the placement frame, the round rods being located outside the first sliding holes, a main screw being threaded into the screw holes, a support member being installed inside the placement frame, and a limit member being installed on the support member.

[0007] As a preferred embodiment of this utility model, the support member includes a support plate, a circular hole, a connecting plate, and a push plate. The support plate has circular holes on both side walls at both ends. The side walls of the circular holes are slidably connected to the circular rod. The side walls of the support plate are slidably connected to the side walls of the first sliding hole. Both ends of the support plate are located on the outer side of the placement frame. The side walls of the support plate are connected to two symmetrically distributed connecting plates. The side walls of the connecting plates are connected to push plates, which are located on the inner side of the placement frame.

[0008] As a preferred embodiment of this utility model, the support plate includes a square plate and a T-plate, with the T-plates connected to both ends of the square plate, and the round hole located on the T-plate.

[0009] As a preferred embodiment of this utility model, a circular plate is connected to one end of the main screw located inside the placement frame. The diameter of the circular plate is larger than the diameter of the main screw, and the center of the circular plate is aligned with the center point of the support plate.

[0010] As a preferred technical solution of this utility model, the limiting member includes a second sliding hole, a screw tube, a follower screw, a pressure rod, and a pressure block. The side wall of the push plate is provided with a plurality of arrayed second sliding holes. A pressure rod is slidably connected in the second sliding hole. The side wall of the push plate facing the support plate is connected with a plurality of arrayed screw tubes. The screw tubes are aligned and connected to the second sliding holes. A follower screw is threadedly connected in the screw tube. Both ends of the pressure rod are connected to pressure blocks.

[0011] As a preferred embodiment of this utility model, the second sliding hole is cross-shaped, the pressure rod is cross-shaped, the diameter of the pressure block is larger than that of the pressure rod, the diameter of the pressure block is smaller than that of the inner diameter of the spiral tube, and one of the pressure blocks is located inside the spiral tube.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This invention involves placing components between limiting members, rotating the main screw to cause the supporting member to drive the limiting members to clamp the components, and utilizing the limiting member structure to allow the limiting members to better fit the surface of the components, thereby achieving a stable clamping effect on the components. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the support plate structure of this utility model; Figure 3 This is a schematic diagram of the placement frame structure of this utility model; Figure 4 This is a schematic diagram of the cross-sectional structure of the support plate of this utility model; Figure 5 This is a schematic diagram of the pressure bar structure of this utility model; Figure 6 This is a schematic diagram of the second sliding hole structure of this utility model.

[0014] In the diagram: 1. Base; 2. Placement frame; 3. First sliding hole; 4. Round rod; 5. Screw hole; 6. Main screw; 7. Support component; 701. Support plate; 702. Round hole; 703. Connecting plate; 704. Push plate; 8. Limiting component; 801. Second sliding hole; 802. Screw tube; 803. Follower screw; 804. Pressure rod; 805. Pressure block; 9. Round plate; 10. Ball bearing; 11. Slot. Detailed Implementation

[0015] The following will refer to the appendix in the embodiments of this utility model. Figure 1-6 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and 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.

[0016] Example Please refer to Figure 1-6 This utility model provides the following technical solution: an EDM fixture with self-locking, including a base 1 with a placement frame 2 connected to the top. The placement frame 2 is an I-shaped frame. Both ends of the outer side wall of the placement frame 2 are connected to round rods 4. Screw holes 5 are opened on one end side wall of the placement frame 2, and first sliding holes 3 are opened on the other end side wall of the placement frame 2. The round rods 4 are located outside the first sliding holes 3. A main screw 6 is threadedly connected to the screw holes 5. A support member 7 is installed inside the placement frame 2. A limit member 8 is installed on the support member 7. A circular plate 9 is connected to one end of the main screw 6 located inside the placement frame 2. The diameter of the circular plate 9 is larger than the diameter of the main screw 6. The center of the circular plate 9 is aligned with the center point of the support plate 701. The circular plate 9 can increase the pressing area of ​​the main screw 6 on the support member 7.

[0017] Place the parts between the limiting members 8, rotate the main screw 6, and the support member 7 will drive the limiting members 8 to clamp the parts. By utilizing the structure of the limiting members 8, the limiting members 8 can better fit with the surface of the parts, thereby achieving the effect of stably clamping the parts.

[0018] Please refer to Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6The support member 7 includes a support plate 701, a round hole 702, a connecting plate 703, and a push plate 704. The side walls of both ends of the support plate 701 are provided with round holes 702. The side walls of the round holes 702 are slidably connected to the round rod 4. The side walls of the support plate 701 are slidably connected to the side walls of the first sliding hole 3. Both ends of the support plate 701 are located outside the placement frame 2. The side walls of the support plate 701 are connected to two symmetrically distributed connecting plates 703. The side walls of the connecting plates 703 are connected to the push plate 704. The push plate 704 is located inside the placement frame 2. The support plate 701 includes a square plate and a T-plate. Both ends of the square plate are connected to the T-plate. The round hole 702 is located on the T-plate. The limiting component 8 includes a second sliding hole 801, a screw tube 802, a follower screw 803, a pressure rod 804, and a pressure block 805. The side wall of the push plate 704 has multiple arrayed second sliding holes 801. The pressure rod 804 is slidably connected in the second sliding hole 801. Multiple arrayed screw tubes 802 are connected to the side wall of the push plate 704 facing the support plate 701. The screw tubes 802 are connected to the second sliding holes 801 and aligned. The follower screw 803 is threaded into the screw tube 802. Both ends of the pressure rod 804 are connected to pressure blocks 805. The second sliding hole 801 is cross-shaped. The pressure rod 804 is cross-shaped. The diameter of the pressure block 805 is larger than that of the pressure rod 804 and smaller than that of the inner diameter of the screw tube 802. One of the pressure blocks 805 is located inside the screw tube 802.

[0019] The components are placed between the limiting members 8. The main screw 6 is rotated, causing the main screw 6 to drive the circular plate 9 to push the support plate 701 to move. The support plate 701 drives the connecting plate 703 to move (by utilizing the sliding connection between the support plate 701 and the first sliding hole 3, and the sliding connection between the circular hole 702 and the circular rod 4, the support plate 701 maintains linear movement). The connecting plate 703 drives the push plate 704 to move. The limiting member 8 is located on the push plate 704. Therefore, the limiting member 8 moves as a whole. After the pressure block 805 contacts the surface of the component, it will push the pressure rod 804 in the opposite direction, causing the pressure rod 804 to move towards one end of the screw tube 802. The surface of the component closest to the pressure block 805... First, the pressure block 805 located on the outside of the screw tube 802 is brought into contact with the push plate 704. At this time, the pressure block 805 and the pressure rod 804 are not moving. Therefore, the parts are clamped by the nearest pressure blocks 805 on both sides. Due to the uneven surface of the parts, the remaining pressure blocks 805 push the pressure rod 804 into the screw tube 802 to different depths. Then, the screw rod 803 is screwed into the screw tube 802 corresponding to the pressure blocks 805 pushed by the parts, so that the screw rod 803 is tightly attached to the pressure block 805 located on the inside of the screw tube 802, thereby achieving the effect of stably fixing parts of different shapes.

[0020] Please refer to Figure 3 The bottom of the base 1 has a slot 11, which can be inserted into the self-locking rod to fix the base 1.

[0021] Please refer to Figure 4 and Figure 6 The bottom end of the push plate 704 is connected to multiple ball bearings 10, and the bottom end of the support plate 701 is not in contact with the top end of the base 1.

[0022] When the push plate 704 moves again, the push plate 704 can reduce the moving resistance of the support member 7 by using the ball bearing 10.

[0023] The working principle and usage process of this utility model are as follows: In specific use, the parts are placed between the limiting members 8, and the main screw 6 is rotated, causing the main screw 6 to drive the circular plate 9 to push the support plate 701 to move. The support plate 701 drives the connecting plate 703 to move, and the connecting plate 703 drives the push plate 704 to move. The push plate 704 uses ball bearings 10 to reduce the moving resistance of the support member 7. The limiting member 8 is located on the push plate 704. Therefore, the limiting member 8 moves as a whole. After the pressure block 805 contacts the surface of the part, it will push the pressure rod 804 in the opposite direction, causing the pressure rod 804 to move towards the end of the screw tube 802. The surface of the part closest to the pressure block 805... First, the pressure block 805 located on the outside of the screw tube 802 is brought into contact with the push plate 704. At this time, the pressure block 805 and the pressure rod 804 are not moving. Therefore, the parts are clamped by the nearest pressure blocks 805 on both sides. Due to the uneven surface of the parts, the remaining pressure blocks 805 push the pressure rod 804 into the screw tube 802 to different depths. Then, the screw rod 803 is screwed into the screw tube 802 corresponding to the pressure blocks 805 pushed by the parts, so that the screw rod 803 is tightly attached to the pressure block 805 located on the inside of the screw tube 802, thereby achieving the effect of stably fixing parts of different shapes.

[0024] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A self-locking electrical discharge machining fixture, comprising a base (1) with a placement frame (2) connected to its top, characterized in that: The placement frame (2) is an I-shaped frame. Both ends of the outer side wall of the placement frame (2) are connected to round rods (4). Both ends of the side wall of the placement frame (2) are provided with screw holes (5). Both ends of the side wall of the placement frame (2) are provided with first sliding holes (3). The round rods (4) are located outside the first sliding holes (3). The screw holes (5) are threaded with main screws (6). A support member (7) is installed inside the placement frame (2). A limit member (8) is installed on the support member (7).

2. The self-locking electrical discharge machining fixture according to claim 1, characterized in that: The support member (7) includes a support plate (701), a round hole (702), a connecting plate (703), and a push plate (704). The support plate (701) has round holes (702) on both side walls. The side walls of the round holes (702) are slidably connected to the round rod (4). The side walls of the support plate (701) are slidably connected to the side walls of the first sliding hole (3). Both ends of the support plate (701) are located outside the placement frame (2). The side walls of the support plate (701) are connected to two symmetrically distributed connecting plates (703). The side walls of the connecting plates (703) are connected to the push plate (704). The push plate (704) is located inside the placement frame (2).

3. The self-locking electrical discharge machining fixture according to claim 2, characterized in that: The support plate (701) includes a square plate and a T-plate, with T-plates connected to both ends of the square plate, and the round hole (702) located on the T-plate.

4. The self-locking electrical discharge machining fixture according to claim 2, characterized in that: The main screw (6) is connected to a circular plate (9) at one end inside the placement frame (2). The diameter of the circular plate (9) is larger than the diameter of the main screw (6), and the center of the circular plate (9) is aligned with the center point of the support plate (701).

5. The self-locking electrical discharge machining fixture according to claim 1, characterized in that: The limiting member (8) includes a second sliding hole (801), a screw tube (802), a follower screw (803), a pressure rod (804), and a pressure block (805). The side wall of the push plate (704) is provided with a plurality of arrayed second sliding holes (801). The pressure rod (804) is slidably connected in the second sliding hole (801). The side wall of the push plate (704) facing the support plate (701) is connected with a plurality of arrayed screw tubes (802). The screw tubes (802) are connected to and aligned with the second sliding holes (801). The follower screw (803) is threadedly connected in the screw tube (802). Both ends of the pressure rod (804) are connected with pressure blocks (805).

6. A self-locking electrical discharge machining fixture according to claim 5, characterized in that: The second sliding hole (801) is cross-shaped, the pressure rod (804) is cross-shaped, the diameter of the pressure block (805) is larger than that of the pressure rod (804), the diameter of the pressure block (805) is smaller than that of the inner diameter of the screw tube (802), and one of the pressure blocks (805) is located inside the screw tube (802).

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