Electric spark machining device for arc-shaped cooling water hole of core

Abstract

An electric spark machining device for an arc-shaped cooling water hole of a core comprises a base, a left support and a right support are arranged on the base, a rotating shaft is arranged between the left support and the right support and connected with an electric spark machine, a rotating seat is arranged on the rotating shaft, and an arc-shaped copper electrode made of red copper materials is arranged in the rotating seat. One end of the arc-shaped copper electrode is fixedly connected with the rotating seat, a workpiece fixing seat is arranged on the upper portion of the base and located between the left support and the right support, a workpiece inserting hole is formed in the workpiece fixing seat, a core is arranged in the workpiece inserting hole and composed of an arc-shaped core and a straight core, and the arc-shaped copper electrode and the arc-shaped core are consistent in radian. The lower end of the arc-shaped copper electrode corresponds to the upper end of the arc-shaped core, and the straight core is fixed with the workpiece fixing seat.

Description

Technical Field

[0001] The utility model relates to an electric discharge machining device for an arc-shaped cooling water hole of a core, belonging to the field of arc-shaped workpiece processing equipment. Background Art

[0002] In an injection mold for an arc-shaped elbow, in order to form a hollow interior in the injection-molded arc-shaped elbow, an arc-shaped core is used. After the arc-shaped elbow is injection-molded and completely cooled and solidified, the arc-shaped core is rotated and withdrawn. In order to enable the arc-shaped elbow to be quickly cooled and solidified, cooling water holes are usually opened in the injection mold and the core. The mold is cooled by cooling water, and then the refrigerant is transferred from the mold to the arc-shaped elbow to enable it to be quickly cooled. The prior art uses a deep hole drill to process the cooling water holes in the mold and the core, but the deep hole drill can only process straight holes, and the arc-shaped cooling water holes inside the arc-shaped core cannot be processed, resulting in a slow cooling rate inside the arc-shaped elbow and affecting production efficiency. Summary of the Invention

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide an electric discharge machining device for an arc-shaped cooling water hole of a core, which can machine an arc-shaped cooling water hole inside the arc-shaped core, has a simple structure and is convenient to machine.

[0004] The technical solution of an electric discharge machining device for an arc-shaped cooling water hole of a core of the utility model is as follows: it includes a base, on which there are two left and right brackets. A rotating shaft is arranged between the two left and right brackets. The rotating shaft is connected to an electric discharge machine. A rotating seat is arranged on the rotating shaft. An arc-shaped copper electrode made of copper material is arranged in the rotating seat. One end of the arc-shaped copper electrode is fixedly connected to the rotating seat. A workpiece fixing seat is arranged between the two left and right brackets on the upper part of the base. A workpiece insertion hole is opened in the workpiece fixing seat. A core is arranged in the workpiece insertion hole. The core is composed of an arc-shaped core and a straight core. The arc of the arc-shaped copper electrode is the same as that of the arc-shaped core. The lower head of the arc-shaped copper electrode corresponds to the upper head of the arc-shaped core. The straight core is fixed to the workpiece fixing seat.

[0005] Further, a fixing hole is opened in the workpiece fixing seat. The fixing hole is communicated with the workpiece insertion hole. A fastener is arranged in the fixing hole. The straight core is inserted into the workpiece insertion hole. The fastener is in contact with the outer wall of the straight core.

[0006] The beneficial effect of an electric discharge machining device for an arc-shaped cooling water hole of a core of the utility model is as follows: by using the working principle of the electric discharge machine, the arc-shaped copper electrode discharges and drives the arc-shaped copper electrode to gradually rotate, machining a cooling water hole with the same arc inside the arc-shaped core, solving the technical problem that the cooling water hole cannot be machined inside the arc-shaped core. The overall structure is simple and the machining is very convenient. Description of the Drawings

[0007] Figure 1 This is a three-dimensional schematic diagram of an electric discharge machining device for the arc-shaped cooling water holes of the core of the present utility model;

[0008] Figure 2 This is a structural schematic diagram of an electric discharge machining device for the arc-shaped cooling water holes of the core of the present utility model. Specific embodiments

[0009] The present utility model relates to an electric discharge machining device for the arc-shaped cooling water holes of the core. As Figure 1 — Figure 2 shown, it includes a base 1. On the base 1, two left and right brackets 2 are provided. Between the two left and right brackets 2, a rotating shaft 3 is provided. The rotating shaft 3 is connected to an electric discharge machine. On the rotating shaft 3, a rotating seat 4 is provided. In the rotating seat 4, an arc-shaped copper electrode 5 made of copper material is provided. One end of the arc-shaped copper electrode 5 is fixedly connected to the rotating seat 4. Above the base 1 and between the two left and right brackets 2, a workpiece fixing seat 6 is provided. In the workpiece fixing seat 6, a workpiece insertion hole 7 is opened. In the workpiece insertion hole 7, a core is provided. The core is composed of an arc-shaped core 8 and a straight core 9. The arc of the arc-shaped copper electrode 5 is the same as that of the arc-shaped core 8. The lower head of the arc-shaped copper electrode 5 corresponds to the upper head of the arc-shaped core 8. The straight core 9 is fixed to the workpiece fixing seat 6.

[0010] Furthermore, a fixing hole 10 is opened on the workpiece fixing seat 6. The fixing hole 10 communicates with the workpiece insertion hole 7. In the fixing hole 10, a fastener 11 is provided. The straight core 9 is inserted into the workpiece insertion hole 7. The fastener 11 is in contact with the outer wall of the straight core 9. When the straight core 9 is inserted into the workpiece insertion hole 7, the angle is adjusted so that the upper head of the arc-shaped core 8 is aligned with the lower head of the arc-shaped copper electrode 5, and then the fastener 11 is tightened to fix and lock the straight core 9, preventing the straight core 9 from rotating during machining, which may cause the arc-shaped core 8 and the arc-shaped copper electrode 5 to be misaligned.

[0011] The utility model discloses an electric discharge machining device for an arc-shaped cooling water hole of a core. When machining an arc-shaped cooling water hole on the core, first pass one end of a straight core 9 through a workpiece jack 7 of a workpiece fixing seat 6 (wherein the straight cooling water hole in the straight core 9 can be machined by a deep hole drill). By rotating the whole core, make the upper center of the arc-shaped core 8 correspond to the lower head of an arc-shaped copper electrode 5, and tighten a fastener 11. At this time, start an electric discharge machine (the specific structure of the electric discharge machine is prior art). The electric discharge machine drives a rotating shaft 3 to rotate, the rotating shaft 3 drives a rotating seat 4 to rotate, the rotating seat 4 drives the arc-shaped copper electrode 5 to rotate, so that the lower head of the arc-shaped copper electrode 5 rotates towards the arc-shaped core 8. When the arc-shaped copper electrode 5 approaches or contacts the arc-shaped core 8, the arc-shaped copper electrode 5 (which can be connected to the electric discharge machine) discharges to the arc-shaped core 8 (the specific working principle of the electric discharge is prior art), so as to machine an arc-shaped cooling water hole on the surface of the arc-shaped core 8. As the arc-shaped cooling water hole is gradually machined, the electric discharge machine also drives the arc-shaped copper electrode 5 to gradually rotate downward until the arc-shaped cooling water hole in the arc-shaped core 8 communicates with the straight cooling water hole in the straight core 9. The electric discharge machine stops discharging and drives the arc-shaped copper electrode 5 to reset upward. At this time, loosen the fastener 11 and take out the core. The electric discharge machining device for the arc-shaped cooling water hole of the core in this solution utilizes the working principle of the electric discharge machine to make the arc-shaped copper electrode 5 discharge and drives the arc-shaped copper electrode 5 to gradually rotate, machining a cooling water hole with the same arc inside the arc-shaped core 8, solving the technical difficulty that a cooling water hole cannot be machined inside the arc-shaped core. The overall structure is simple and the machining is very convenient.

Claims

1. An electrospark machining device for a core arc cooling water hole, characterized in that: The invention comprises a base (1), wherein two left and right brackets (2) are arranged on the base (1), a rotating shaft (3) is arranged between the left and right brackets (2), the rotating shaft (3) is connected to an electric spark machine, a rotating seat (4) is arranged on the rotating shaft (3), an arc-shaped copper electrode (5) made of copper material is arranged in the rotating seat (4), one end of the arc-shaped copper electrode (5) is fixedly connected to the rotating seat (4), a workpiece fixing seat (6) is arranged on the upper part of the base (1) between the left and right brackets (2), a workpiece insertion hole (7) is opened in the workpiece fixing seat (6), a core is arranged in the workpiece insertion hole (7), the core consists of an arc-shaped core (8) and a straight core (9), the arc-shaped copper electrode (5) has the same curvature as the arc-shaped core (8), the lower end of the arc-shaped copper electrode (5) corresponds to the upper end of the arc-shaped core (8), and the straight core (9) is fixed to the workpiece fixing seat (6).

2. The electrospark machining device for the arc-shaped cooling water hole of the core according to claim 1, characterized in that: The workpiece fixing seat (6) is provided with a fixing hole (10), the fixing hole (10) is communicated with the workpiece insertion hole (7), a fastener (11) is arranged in the fixing hole (10), the straight core (9) is inserted into the workpiece insertion hole (7), and the fastener (11) contacts the outer wall of the straight core (9).

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