Part positioning jig for electric spark machining

Abstract

The utility model relates to the technical field of electric spark machining, in particular to a part positioning jig for electric spark machining, which comprises a base, a fixing table is arranged at the top of the base, side grooves are arranged on two sides of the outer surface of the fixing table, and four support legs are mounted at the bottom of the base. Positioning structures are arranged in the two side grooves, the two positioning structures comprise threaded rods, the two threaded rods are in threaded connection with the side grooves, and rotating handles are installed at one ends of the two threaded rods; by means of the positioning structure, when common parts and special-shaped parts are machined and positioned, the parts are placed in the fixing table, then rotating handles are rotated correspondingly, threaded rods are made to move forwards, and therefore fixing blocks can drive connecting rods to slide forwards in moving grooves; therefore, the side line of the part can be hooped, the part can be fixed, and the purpose of fixing and positioning different special-shaped parts is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric discharge machining, in particular to a part positioning fixture for electric discharge machining. Background Technique

[0002] Electric discharge machining refers to a method of machining a workpiece through the electro-erosion effect of pulsed discharge between a tool electrode and a workpiece electrode in a certain medium. During machining, one pole of the pulsed 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 or mineral oil or deionized water). When the pulsed voltage is applied between the two poles, the liquid medium at the closest point between the poles under the current conditions is broken down to form a discharge channel. Due to the very small cross-sectional area of the channel and the extremely short discharge time, the energy is highly concentrated, and the instantaneous high temperature generated in the discharge area is sufficient to melt or even evaporate the material, resulting in a small pit. In this way, it cycles repeatedly at a high frequency. The tool electrode continuously feeds towards the workpiece, and its shape is finally replicated on the workpiece to form the required machining surface.

[0003] During the use of the existing positioning equipment for electric discharge machining, there is a lack of a fixing structure for parts of different sizes and shapes. As a result, when clamping and fixing parts of different shapes, the existing equipment is very inconvenient, affecting the normal machining work. Based on the existing technical deficiencies, the utility model designs a part positioning fixture for electric discharge machining. Summary of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the utility model provides a part positioning fixture for electric discharge machining, which has the advantages of fixing and positioning different shaped parts.

[0005] The utility model provides the following technical solution: A part positioning fixture for electric discharge machining, including a base, a fixing table is arranged on the top of the base, side grooves are opened on both sides of the outer surface of the fixing table, and four supporting feet are installed at the bottom of the base; positioning structures are arranged inside the two side grooves. The two positioning structures include threaded rods. The two threaded rods are in threaded connection with the side grooves. One ends of the two threaded rods are installed with turning handles. One ends of the two threaded rods are rotatably installed with fixing blocks. Connecting rods are fixedly installed inside the two fixing blocks. Connecting blocks are installed on both sides of the outer surfaces of the two connecting rods. Fixing plates are installed on one sides of the two connecting blocks. A plurality of inner grooves are opened inside the two fixing plates. Springs are installed inside the plurality of inner grooves. One ends of the plurality of springs are installed with ejector rods.

[0006] As a preferred technical solution of the utility model, moving grooves are opened on both sides of the outer surface of the fixing table, and through holes are opened on both sides of the bottom of the fixing table.

[0007] As a preferred technical solution of the present utility model, rotating shafts are installed at both ends of the two connecting rods, and the two rotating shafts are slidably connected to the moving grooves.

[0008] As a preferred technical solution of the present utility model, moving wheels are installed on both sides of the bottom of the two fixing plates, and the two moving wheels are slidably connected to the through holes.

[0009] As a preferred technical solution of the present utility model, a fixing structure is installed at one end of the two connecting rods, and the fixing structure includes a telescopic sleeve and a connecting piece.

[0010] As a preferred technical solution of the present utility model, the telescopic sleeve is arranged at one end of one of the connecting rods, and the connecting piece is arranged at one end of the other connecting rod.

[0011] As a preferred technical solution of the present utility model, a sleeve rod is sleeved inside the telescopic sleeve, and a fastening bolt is installed inside the sleeve rod in a threaded manner.

[0012] As a preferred technical solution of the present utility model, a fixing hole is formed on one side of the connecting piece, and the diameter of the fixing hole is the same as that of the fastening bolt.

[0013] Compared with the prior art, the present utility model has the following beneficial effects:

[0014] 1. For the part positioning fixture for electric discharge machining, through the positioning structure, when machining and positioning ordinary parts and special-shaped parts, by placing the parts inside the fixing table and then respectively rotating the turning handles to make the threaded rods move forward, the fixing blocks can drive the connecting rods to slide forward in the moving grooves. When the ejector rods contact the edges of the parts, the springs contract under pressure, thereby clamping the edges of the parts, and thus the parts can be fixed, achieving the purpose of fixing and positioning different special-shaped parts.

[0015] 2. For the part positioning fixture for electric discharge machining, through the fixing structure, after the parts are positioned and fixed by the positioning structures on both sides, by pulling out the sleeve rod from the telescopic sleeve and then fixing the head of the sleeve rod to the fixing hole through the fastening bolt, the two positioning structures can be connected and fixed to prevent the parts from loosening due to vibration during machining. Description of the Drawings

[0016] Figure 1 is a schematic diagram of the external structure of the present utility model;

[0017] Figure 2 is a schematic diagram of the side groove structure of the present utility model;

[0018] Figure 3 is a schematic diagram of the fixing block structure of the present utility model;

[0019] Figure 4 Schematic diagram of the inner groove structure of the present utility model;

[0020] Figure 5 Schematic diagram of the fixing structure of the present utility model.

[0021] In the figure: 1, base; 2, fixing table; 21, side groove; 22, moving groove; 23, perforation; 3, positioning structure; 31, threaded rod; 32, turning handle; 33, fixing block; 34, connecting rod; 35, connecting block; 36, fixing plate; 37, inner groove; 38, spring; 39, ejector rod; 310, rotating shaft; 311, moving wheel; 4, support leg; 5, fixing structure; 51, telescopic sleeve; 52, sleeve rod; 53, fastening bolt; 54, connecting piece; 55, fixing hole. Specific implementation manner

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present 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 the present utility model.

[0023] Please refer to Figures 1-5 , a part positioning fixture for electric discharge machining, including a base 1, a fixing table 2 is arranged on the top of the base 1, side grooves 21 are opened on both sides of the outer surface of the fixing table 2, and four support legs 4 are installed at the bottom of the base 1; a positioning structure 3 is arranged inside the two side grooves 21, the two positioning structures 3 include threaded rods 31, the two threaded rods 31 are in threaded connection with the side grooves 21, a turning handle 32 is installed at one end of the two threaded rods 31, a fixing block 33 is rotatably installed at one end of the two threaded rods 31, a connecting rod 34 is fixedly installed inside the two fixing blocks 33, connecting blocks 35 are installed on both sides of the outer surface of the two connecting rods 34, a fixing plate 36 is installed on one side of the two connecting blocks 35, a plurality of inner grooves 37 are opened inside the two fixing plates 36, springs 38 are installed inside the plurality of inner grooves 37, and an ejector rod 39 is installed at one end of the plurality of springs 38.

[0024] Please refer to Figures 2-4 , moving grooves 22 are opened on both sides of the outer surface of the fixing table 2, and perforations 23 are opened on both sides of the bottom of the fixing table 2. Rotating shafts 310 are rotatably installed at both ends of the two connecting rods 34, and the two rotating shafts 310 are in sliding connection with the moving grooves 22. Moving wheels 311 are installed on both sides of the bottom of the two fixing plates 36, and the two moving wheels 311 are in sliding connection with the perforations 23.

[0025] Through the arrangement of the two rotating shafts 310, when the fixed block 33 pushes the connecting rod 34, the two rotating shafts 310 roll in the moving groove 22. Through the arrangement of the moving wheels 311, when the fixed block 33 pushes the connecting rod 34, the two moving wheels 311 roll in the through holes 23 to improve the smoothness of the device.

[0026] Please refer to Figure 1 and Figure 5 As shown in FIGS. and, a fixing structure 5 is installed at one end of each of the two connecting rods 34. The fixing structure 5 includes a telescopic sleeve 51 and a connecting piece 54. The telescopic sleeve 51 is arranged at one end of one of the connecting rods 34, and the connecting piece 54 is arranged at one end of the other connecting rod 34. A sleeve rod 52 is sleeved inside the telescopic sleeve 51, and a fastening bolt 53 is threadedly installed inside the sleeve rod 52. A fixing hole 55 is formed on one side of the connecting piece 54, and the fixing hole 55 has the same diameter as the fastening bolt 53.

[0027] After the positioning structures 3 on both sides position and fix the parts, by pulling out the sleeve rod 52 from the telescopic sleeve 51, and then fixing the head of the sleeve rod 52 with the fixing hole 55 through the fastening bolt 53, the two positioning structures 3 can be connected and fixed to prevent the parts from loosening due to vibration during processing.

[0028] Working principle: When a positioning jig for parts used in electric discharge machining is in use, in the initial state, first, when positioning and machining ordinary parts and special-shaped parts, the parts are placed inside the fixed table 2, and then the turning handles 32 are rotated respectively to make the threaded rods 31 move forward. At the same time, the two rotating shafts 310 roll in the moving groove 22 and the two moving wheels 311 roll in the through holes 23 to improve the smoothness of the device. After the parts are fixed, by pulling out the sleeve rod 52 from the telescopic sleeve 51, and then fixing the head of the sleeve rod 52 with the fixing hole 55 through the fastening bolt 53, the two positioning structures 3 can be connected and fixed to prevent the parts from loosening due to vibration during processing.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A parts positioning fixture for electrospark machining, comprising a base (1), characterized in that: A fixing platform (2) is arranged on the top of the base (1), side grooves (21) are provided on both sides of the outer surface of the fixing platform (2), and four supporting legs (4) are installed at the bottom of the base (1); Positioning structures (3) are provided inside the two side grooves (21). The two positioning structures (3) include threaded rods (31). The two threaded rods (31) are threadedly connected to the side grooves (21). A turning handle (32) is installed at one end of the two threaded rods (31). A fixing block (33) is rotatably installed at one end of the two threaded rods (31). Connecting rods (34) are fixedly installed inside the two fixing blocks (33). Connecting blocks (35) are installed on both sides of the outer surfaces of the two connecting rods (34). A fixing plate (36) is installed on one side of the two connecting blocks (35). A plurality of inner grooves (37) are provided inside the two fixing plates (36). Springs (38) are installed inside the plurality of inner grooves (37). A push rod (39) is installed at one end of the plurality of springs (38).

2. The part positioning fixture for electrospark machining according to claim 1, characterized in that: The outer surface of the fixing platform (2) is provided with movable grooves (22) on both sides, and the bottom of the fixing platform (2) is provided with through holes (23) on both sides.

3. The part positioning fixture for electrospark machining according to claim 1, characterized in that: Rotating shafts (310) are rotatably mounted at both ends of the two connecting rods (34), and the two rotating shafts (310) are slidably connected to the movable grooves (22).

4. The part positioning fixture for electrospark machining according to claim 1, characterized in that: Moving wheels (311) are installed on both sides of the bottom of the two fixing plates (36), and the two moving wheels (311) are slidably connected to the through holes (23).

5. The part positioning fixture for electrospark machining according to claim 1, characterized in that: A fixing structure (5) is installed at one end of the two connecting rods (34), and the fixing structure (5) comprises a telescopic sleeve (51) and a connecting piece (54).

6. The part positioning fixture for electrospark machining according to claim 5, characterized in that: The telescopic sleeve (51) is arranged at one end of one of the connecting rods (34), and the connecting piece (54) is arranged at one end of the other connecting rod (34).

7. The part positioning fixture for electrospark machining according to claim 5, characterized in that: A sleeve rod (52) is sleeved inside the telescopic sleeve (51), and a fastening bolt (53) is threadedly mounted inside the sleeve rod (52).

8. The part positioning fixture for electrospark machining according to claim 5, characterized in that: A fixing hole (55) is provided on one side of the connecting plate (54), and the fixing hole (55) has the same diameter as the fastening bolt (53).

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