Ejector pin electric discharge machining jig

Abstract

The utility model belongs to the technical field of die part production and machining, and particularly relates to an ejector pin electric discharge machining jig which comprises a pressing plate, four supporting columns are arranged at the top of the pressing plate, and U-shaped blocks are connected to the supporting columns in a sliding mode. The pull rod is pulled, the pull rod drives the connecting block to move through the flexible steel rope, the connecting block slides on the guide rod and compresses the spring, the connecting block drives the clamping pin to move, the clamping pin is separated from one of the multiple adjusting grooves and stored in the corresponding cavity, the lifting plate is moved to drive the U-shaped block to slide on the supporting column, and then the U-shaped block is moved to move. After a proper position is adjusted, the tension on the pull rod is released, the lower spring in a compressed state is reset, the spring drives the connecting block to move, the connecting block drives the bayonet lock to move and is clamped with another adjusting groove in the multiple adjusting grooves, the lifting plate is fixed, the distance between the lifting plate and the pressing plate is changed, and operation is easy and convenient in the adjusting process; the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mold part production and processing, and specifically relates to a thimble electrical discharge machining fixture. Background Technique

[0002] Injection molds are important process equipment for producing various industrial products. With the rapid development of the plastics industry and the popularization and application of plastic products in industrial sectors such as aviation, aerospace, electronics, machinery, ships, and automobiles, the application scope of injection molds is becoming more and more extensive. A thimble is a common injection mold accessory used in injection molds. Thimbles can also be called ejector pins, insert pins, center pins, support pins, etc. Electrical discharge machining is a type of non-traditional machining technology and is widely used in the mold manufacturing and machining industries. Electrical discharge machining can be used to machine super-hard materials and workpieces with complex shapes that are difficult to machine by traditional cutting methods. It is usually used to machine conductive materials and can machine complex cavities or contours on difficult-to-machine materials such as titanium alloys, tool steels, carbon steels, and cemented carbides. During the production process of thimbles, electrical discharge machining treatment needs to be carried out on the thimbles;

[0003] Chinese publicly authorized invention: CN219786868U discloses a thimble electrical discharge machining fixture, including a pressure plate, support columns, a lifting plate, and a limit sleeve: the pressure plate and the lifting plate are arranged side by side, and there is an installation gap between the lifting plate and the pressure plate for installing the thimble structure; one end of the support column is arranged on the pressure plate, and the other end of the support column is movably connected to the lifting plate; the limit sleeve is movably connected to the support column and is connected to the lifting plate, and the limit sleeve can be adjusted from a first position on the support column to a second position to drive the lifting plate to move towards or away from the pressure plate;

[0004] However, there are still certain problems with its device. During actual use, since each limit sleeve needs to be adjusted individually, when facing a large number of thimbles or when different-height thimbles need to be replaced frequently, this method of adjusting one by one is not only time-consuming and laborious but also affects the processing efficiency. Therefore, we propose a thimble electrical discharge machining fixture to solve the above problems. Content of the Utility Model

[0005] (I) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the prior art, the utility model provides a thimble electrical discharge machining fixture, which solves the problems raised in the above background technique.

[0007] (II) Technical Solutions

[0008] The utility model specifically adopts the following technical solutions to achieve the above purposes:

[0009] A thimble electric discharge machining fixture includes a pressing plate. Four support columns are provided at the top of the pressing plate. A U-shaped block is slidably connected to the support columns. The same lifting plate is fixedly connected between the four U-shaped blocks. Two cavities are opened on the lifting plate. Two grooves are opened on each of the inner walls on both sides of the cavity. A guide rod is welded between the inner walls on both sides of the groove. A connecting block is slidably connected to the guide rod. A spring is welded between one side of the connecting block and one inner wall of the corresponding groove. The spring is movably sleeved on the corresponding guide rod. A latch is welded to the other side of the connecting block. A flexible steel cable is fixedly connected to one side of the connecting block. Two fixed pulleys are rotatably connected to one inner wall of the cavity. The end of the flexible steel cable bypasses one side of the corresponding fixed pulley and extends outside the lifting plate and is welded to a pull rod. A plurality of adjustment grooves are opened on one side of the support column. One of the plurality of adjustment grooves is engaged with the corresponding latch.

[0010] Furthermore, a plurality of first mounting holes are opened on the lifting plate, a plurality of second mounting holes are opened on the pressing plate, and a backing plate is provided at the bottom of the pressing plate.

[0011] Furthermore, four fixing grooves are opened on the top of the pressing plate, and a fixing block is movably contacted on the fixing groove.

[0012] Furthermore, the fixing block is threadedly connected to the pressing plate by a bolt, and the top of the fixing block is fixedly connected to the end of the corresponding support column.

[0013] Furthermore, a T-shaped rod is provided in the cavity, and the end of the T-shaped rod extends outside the lifting plate and is fixedly connected to the corresponding pull rod.

[0014] Furthermore, rectangular holes are opened on both the front inner wall and the rear inner wall of the cavity, and the inner wall of the rectangular hole is slidably connected to the outer side of the corresponding latch.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the present utility model provides a thimble electric discharge machining fixture, which has the following beneficial effects:

[0017] In this utility model, by pulling the pull rod, the pull rod drives the connecting block to move through a flexible steel cable. The connecting block slides on the guide rod and compresses the spring. The connecting block drives the pin to move, so that the pin is separated from one of the multiple adjustment slots and is received in the corresponding cavity. Moving the lifting plate drives the U-shaped block to slide on the support column. After adjusting to the appropriate position, the pulling force on the pull rod is released, and the lower spring in the compressed state resets. The spring drives the connecting block to move, and the connecting block drives the pin to move and engage with another adjustment slot among the multiple adjustment slots, fixing the lifting plate, changing the distance between the lifting plate and the pressing plate. During the adjustment process, the operation is simple and convenient, improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structural schematic diagram of this utility model;

[0019] Figure 2 is a partial three-dimensional structural schematic diagram of this utility model;

[0020] Figure 3 is a partial three-dimensional structural schematic diagram of the lifting plate of this utility model cut open;

[0021] Figure 4 is a three-dimensional structural schematic diagram of the connection between the support column and the fixing block of this utility model.

[0022] In the figure: 1, pressing plate; 2, support column; 3, U-shaped block; 4, lifting plate; 5, cavity; 6, groove; 7, guide rod; 8, connecting block; 9, spring; 10, pin; 11, flexible steel cable; 12, fixed pulley; 13, pull rod; 14, adjustment slot; 15, first mounting hole; 16, second mounting hole; 17, fixing groove; 18, fixing block; 19, backing plate; 20, bolt; 21, T-shaped rod; 22, rectangular hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of this utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, rather than all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of this utility model.

[0024] Embodiment

[0025] As Figures 1-4As shown in the figure, a thimble electrical discharge machining fixture proposed by an embodiment of the present utility model includes a pressing plate 1. Four support columns 2 are provided on the top of the pressing plate 1. A U-shaped block 3 is slidably connected to the support columns 2. The same lifting plate 4 is fixedly connected between the four U-shaped blocks 3. Two cavities 5 are formed in the lifting plate 4. Two grooves 6 are formed on both inner walls of each cavity 5. A guide rod 7 is welded between the two inner walls of each groove 6. A connecting block 8 is slidably connected to the guide rod 7. A spring 9 is welded between one side of the connecting block 8 and one inner wall of the corresponding groove 6. The spring 9 is movably sleeved on the corresponding guide rod 7. A latch 10 is welded to the other side of the connecting block 8. A flexible steel cable 11 is fixedly connected to one side of the connecting block 8. Two fixed pulleys 12 are rotatably connected to one inner wall of the cavity 5. The end of the flexible steel cable 11 bypasses one side of the corresponding fixed pulley 12 and extends outside the lifting plate 4 and is welded to a pull rod 13. A plurality of adjustment grooves 14 are formed on one side of the support column 2. One of the plurality of adjustment grooves 14 is engaged with the corresponding latch 10. By pulling the pull rod 13, the pull rod 13 drives the T-shaped rod 21 to move. At the same time, the pull rod 13 drives the corresponding connecting block 8 to move through the flexible steel cable 11. The connecting block 8 slides on the corresponding guide rod 7 and compresses the spring 9. At the same time, the connecting block 8 drives the corresponding latch 10 to move, so that the latch 10 is separated from one of the plurality of adjustment grooves 14 and is received in the corresponding cavity 5. Then, the lifting plate 4 is moved. The lifting plate 4 drives the U-shaped block 3 to slide on the support column 2. When the appropriate position is adjusted, the pulling force on the pull rod 13 is released. The spring 9 in the compressed state resets. The spring 9 drives the corresponding connecting block 8 to move. The connecting block 8 drives the corresponding latch 10 to move and is engaged with another one of the plurality of adjustment grooves 14, thereby fixing the lifting plate 4. By changing the distance between the lifting plate 4 and the pressing plate 1, the operation is simple and convenient during the adjustment process, improving the work efficiency.

[0026] In some embodiments, a plurality of first mounting holes 15 are formed in the lifting plate 4, a plurality of second mounting holes 16 are formed in the pressing plate 1, and a backing plate 19 is provided at the bottom of the pressing plate 1.

[0027] In some embodiments, four fixing grooves 17 are formed on the top of the pressing plate 1. A fixing block 18 is in movable contact with the fixing grooves 17. The setting of the fixing block 18 plays a role in connection.

[0028] In some embodiments, the fixing block 18 is threadedly connected to the pressing plate 1 through a bolt 20, and the top of the fixing block 18 is fixedly connected to the end of the corresponding support column 2.

[0029] In some embodiments, a T-shaped rod 21 is provided in the cavity 5. The end of the T-shaped rod 21 extends outside the lifting plate 4 and is fixedly connected to the corresponding pull rod 13. The setting of the T-shaped rod 21 plays a role in limiting.

[0030] In some embodiments, rectangular holes 22 are formed in both the front inner wall and the rear inner wall of the cavity 5. The inner wall of the rectangular hole 22 is slidably connected to the outer side of the corresponding latch 10. The arrangement of the rectangular hole 22 plays a role in limiting.

[0031] Working principle or structural principle: During use, when adjustment is required, the pull rod 13 is pulled. The pull rod 13 drives the T-shaped rod 21 to move. At the same time, the pull rod 13 drives the corresponding connecting block 8 to move through the flexible steel cable 11. The connecting block 8 slides on the corresponding guide rod 7 and compresses the spring 9. At the same time, the connecting block 8 drives the corresponding latch 10 to move, so that the latch 10 is separated from one of the corresponding plurality of adjustment slots 14 and is received in the corresponding cavity 5. Then, the lifting plate 4 is moved. The lifting plate 4 drives the U-shaped block 3 to slide on the support column 2. When the appropriate position is adjusted, the pulling force on the pull rod 13 is released. The lower spring 9 in the compressed state resets. The spring 9 drives the corresponding connecting block 8 to move. The connecting block 8 drives the corresponding latch 10 to move and is engaged with another one of the plurality of adjustment slots 14, thereby fixing the lifting plate 4 and changing the distance between the lifting plate 4 and the pressing plate 1. The operation is simple and convenient during the adjustment process, improving work efficiency. The fixing block 18 and the pressing plate 1 can be disassembled through the bolt 20, and then the support column 2 can be removed.

[0032] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A thimble electrical discharge machining fixture, comprising a pressing plate (1), characterized in that: Four support columns (2) are provided at the top of the pressing plate (1). A U-shaped block (3) is slidably connected to the support column (2). The same lifting plate (4) is fixedly connected between the four U-shaped blocks (3). Two cavities (5) are formed in the lifting plate (4). Two grooves (6) are formed in the inner walls on both sides of each cavity (5). A guide rod (7) is welded between the inner walls on both sides of the groove (6). A connecting block (8) is slidably connected to the guide rod (7). A spring (9) is welded between one side of the connecting block (8) and the inner wall on one side of the corresponding groove (6). The spring (9) is movably sleeved on the corresponding guide rod (7). A latch (10) is welded to the other side of the connecting block (8). A flexible steel cable (11) is fixedly connected to one side of the connecting block (8). Two fixed pulleys (12) are rotatably connected to the inner wall on one side of the cavity (5). The end of the flexible steel cable (11) bypasses one side of the corresponding fixed pulley (12) and extends outside the lifting plate (4) and is welded to a pull rod (13). A plurality of adjustment grooves (14) are formed on one side of the support column (2). One of the plurality of adjustment grooves (14) is engaged with the corresponding latch (10).

2. The thimble electric discharge machining fixture according to claim 1, wherein: A plurality of first mounting holes (15) are formed in the lifting plate (4). A plurality of second mounting holes (16) are formed in the pressing plate (1). A backing plate (19) is provided at the bottom of the pressing plate (1).

3. The thimble electric discharge machining fixture according to claim 1, wherein: Four fixing grooves (17) are formed at the top of the pressing plate (1). A fixing block (18) is in movable contact with the fixing groove (17).

4. The thimble electrical discharge machining fixture according to claim 3, wherein: The fixing block (18) is threadedly connected to the pressing plate (1) by a bolt (20). The top of the fixing block (18) is fixedly connected to the end of the corresponding support column (2).

5. The thimble electrical discharge machining fixture according to claim 1, wherein: A T-shaped rod (21) is provided in the cavity (5). The end of the T-shaped rod (21) extends outside the lifting plate (4) and is fixedly connected to the corresponding pull rod (13).

6. The thimble electric discharge machining fixture according to claim 1, wherein: Rectangular holes (22) are formed in the inner walls on the front side and the rear side of the cavity (5). The inner wall of the rectangular hole (22) is slidably connected to the outer side of the corresponding latch (10).

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