A processing method for precision parts in a communication connector mold

Abstract

The present invention discloses a processing method for precision parts in a communication connector mold. The first electrode head is used to move vertically downward along the Z-axis and the part is pre-processed in a processing mode without translation, so that a first intermediate boss and a first edge boss are formed on the part; the first electrode head continues to move vertically downward along the Z-axis and a circular translation processing mode is used to process the support bottom surface of the part, and a second intermediate boss and a second edge boss are formed on the support bottom surface; the first electrode head is used to perform spiral conical shrinking electric discharge machining upward along the Z-axis starting from the support bottom surface of the part; the second electrode head is used to move vertically downward along the Z-axis and a circular translation processing mode is used to process to the support bottom surface of the part. By changing the processing method of the tool electrode and the electric discharge machining method, the present invention makes it feasible to batch-process the parts, greatly improves the processing yield, the part quality is stable without scrapping, and the accuracy is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of machining, and particularly relates to a machining method for precision parts in a communication connector mold. Background Art

[0002] In actual electrical discharge machining, the shape of the electrode head is actually copied onto the part, so as to form a reverse shape on the part that is the same as the shape of the electrode head. Theoretically speaking, the shape of the part machined is the same as the shape of the electrode head. Therefore, the shape, shape accuracy, dimensional accuracy, and surface finish of the machined electrode head directly determine the shape, shape accuracy, dimensional accuracy, and surface quality of the electrical discharge machining position on the machined part. Therefore, in order to electrically discharge machine high-quality precision parts, the manufacturing accuracy and quality of the electrode are particularly important. Especially when machining a smaller shape on a precision part, since the shape of the electrode head is also small, in addition to reasonable electrical discharge machining parameters, high-quality precision electrodes are also required to improve the replication accuracy of the precision shape of the part.

[0003] As Figure 1 shown, the part 100 is a core precision part used in a high-speed communication connector mold. The characteristics of this part are small shape, high geometric accuracy, high consistency requirements, and very strict machining requirements. Its forming part has part shape A101, part shape B102, part shape C103, part shape D104, and part shape E105. The part shape A has arcs with R0.100mm and R0.063mm, and the minimum width is 0.126mm; the part shape A and the part shape B are bosses and are 0.131mm apart. The part shape C is a C-shaped chamfer of 0.05mm. The part shape D is a sharp angle with R0.015mm. The part shape E is a bottom surface platform. Currently, these shapes can only be completed by electrical discharge machining with an electrode head of the corresponding same shape.

[0004] As Figure 2 and Figure 3 shown, it is the electrode head 200 used for machining the part 100. The electrode head 200 has an electrode shape A201 that matches the part shape A, an electrode shape B202 that matches the part shape B, an electrode shape C203 that matches the part shape C, an electrode shape D204 that matches the part shape D, and an electrode shape E205 that matches the part shape E. Simply put, the forming part of the electrode head 200 is a reverse shape that is the same as the forming part shape of the part 100. The electrode shape B and the electrode shape C are both grooves; currently, the machining and manufacturing method of the electrode head 200 can only be completed by milling with a high-speed CNC milling center (abbreviation: CNC).

[0005] In the electrode processing and manufacturing process, when CNC mills this kind of electrode head 200 with many shapes and relatively small size, it can only use expensive small carbide milling cutters with a diameter of less than or equal to ø0.15mm. Such small milling cutters wear quickly, have a short service life, need to be replaced frequently, are difficult to mill and take a long time, and the shape and size of the milled electrode head are difficult to guarantee. In particular, the C angle of the electrode shape C is very difficult to control and needs to be repeatedly trimmed, and the electrode manufacturing cost is very high. In addition, since the electrode head size cannot be fully detected, the electrode quality is also difficult to fully guarantee, and electrode quality problems can only be discovered during the EDM process.

[0006] In the part processing link, when the EDM processes the part 100, the electrode head 200 and the discharge area of the part 100 form a closed inner cavity, and the carbon particles generated by the electric corrosion are difficult to discharge. The high concentration of regional carbon particles causes serious damage to the edges of the part shapes A and B, resulting in the overall shape contour of the part 100 not being clear enough, and the arcs R0.100mm and R0.063mm on the part shape A are too large and have poor verticality, the C angle of the part shape C is irregular and has a large difference, and the sharp angle of the part shape D is R0.05~R0.07mm; in this case, the EDM can only repeatedly measure and correct the part 100, and the electrode head also needs to be CNC repaired according to the actual EDM processing situation. The EDM part correction process is inefficient, the scrap rate is high, and the quality is not controlled. The processed parts can only be barely tried and cannot meet the final requirements of the product. Summary of the invention

[0007] The purpose of the present invention is to provide a method for processing precision parts in a communication connector mold to solve the above-mentioned problems existing in the prior art.

[0008] In order to achieve the above object, the present invention adopts the following technical solution: A method for processing precision parts in a communication connector mold, comprising the following steps:

[0009] Step A, pre-processing the part vertically downward along the Z axis using a first electrode head and using a processing method without translation, so that a first middle boss and a first edge boss are formed on the part, the first electrode head is provided with a first middle through hole and a plurality of first edge through holes, the plurality of first edge through holes are arranged on the peripheral side of the first middle through hole, the first middle boss matches the first middle through hole, and the first edge boss matches the first edge through hole;

[0010] Step B, using the first electrode head to continue to move vertically downward along the Z axis and use a circular translation processing method to process the support bottom surface of the part, and forming a second middle boss and a second edge boss on the support bottom surface based on the first middle boss and the first edge boss;

[0011] Step C: Using the first electrode head, start from the supporting bottom surface of the part and perform spiral conical shrinking electro-discharge machining upward along the Z-axis. This will machine the second intermediate boss into the third intermediate boss and the first transition surface, and machine the second edge boss into the third edge boss and the second transition surface. The third intermediate boss and the supporting bottom surface are transitioned through the first transition surface, and the third edge boss and the supporting bottom surface are transitioned through the second transition surface.

[0012] Step D: Using the second electrode head, move vertically downward along the Z-axis and adopt a circular translation machining method to machine to the supporting bottom surface of the part. Machine the third intermediate boss into the fourth intermediate boss, and remove the first transition surface, so that a sharp angle is formed between the fourth intermediate boss and the supporting bottom surface, and retain the third edge boss and the second transition surface. The second electrode head is provided with a second intermediate through hole and a plurality of second edge through holes. The plurality of second edge through holes are arranged on the circumference of the second intermediate through hole, and the size of the second edge through hole is larger than the size of the second intermediate boss.

[0013] As an optional implementation manner of the above technical solution, during the process of using the first electrode head to perform spiral conical shrinking electro-discharge machining upward along the Z-axis, α is the inclination angle, β is the helix angle, H is the final electro-discharge machining height, W is the maximum electro-discharge translation amount, △h is the electro-discharge machining height when the helix angle β spirally rises one circle following the inclination angle α, and △w is the translation amount of electro-discharge machining when the helix angle β spirally rises one circle of △h following the inclination angle α. △w gradually expands and W gradually shrinks as △h rises, until △w = W, and then end the electro-discharge machining of this section.

[0014] As an optional implementation manner of the above technical solution, after the pre-machining of the part is completed, measure the first actual side margin of the first intermediate boss and the second actual side margin of the first edge boss, and adjust the electro-discharge machining parameters for deviation compensation according to the difference between the first actual side margin and the first theoretical side margin of the first intermediate boss and the difference between the second actual side margin and the second theoretical side margin of the first edge boss.

[0015] As an optional implementation manner of the above technical solution, the first theoretical side margin of the first intermediate boss is the projection distance of the first transition surface on the Z-direction horizontal plane plus the avoidance distance between the fourth intermediate boss and the first electrode head; the second theoretical side margin of the first edge boss is the projection distance of the second transition surface on the Z-direction horizontal plane.

[0016] As an optional implementation manner of the above technical solution, both the first electrode head and the second electrode head are used electrodes.

[0017] As an alternative embodiment of the above technical solution, the long sides of the first electrode head and the second electrode head are connected to each other to form a tool electrode, and an electrode clamping position is provided at one end of the tool electrode.

[0018] As an alternative embodiment of the above technical solution, the material of the tool electrode is tungsten copper or chromium copper.

[0019] As an alternative embodiment of the above technical solution, the processing method of the tool electrode includes: using a precision grinding machine to process all the external dimensions of the tool electrode on the blank electrode, and ensuring the parallelism and perpendicularity between surfaces; then using a precision slow wire cutting machine to complete the shape processing of the first electrode head and the second electrode head by adopting a cutting-two-and-repairing-six processing technology.

[0020] As an alternative embodiment of the above technical solution, before pre-processing the part, a precision grinding machine is used to process all the external dimensions of the part, and a rough machining allowance is left on the machining top surface of the part.

[0021] As an alternative embodiment of the above technical solution, after the second electrode head is processed by using a circular translation processing method, a plane electrode is used to remove the rough machining allowance.

[0022] The beneficial effects of the present invention are as follows:

[0023] By changing the processing method of the tool electrode and the electrical discharge machining method, the present invention makes it feasible to mass-produce parts, greatly improves the processing yield, ensures stable part quality without scrap, guarantees the precision, has a long technical life cycle, brings a positive effect to the injection molding production yield and production efficiency of subsequent products, has high economic benefits for the processing of parts in this type of high-value-added high-speed communication connector mold, and is highly competitive in the industry. Description of the Drawings

[0024] Figure 1 is a schematic structural view of a part in an embodiment of the present invention;

[0025] Figure 2 is a processing state diagram of an electrode head in the prior art;

[0026] Figure 3 is a processing state diagram of a part and an electrode head in the prior art;

[0027] Figure 4 is a relationship view of a part and a first electrode head in an embodiment of the present invention;

[0028] Figure 5 is a relationship view of a part and a second electrode head in an embodiment of the present invention;

[0029] Figure 6Schematic diagram of the electrical discharge machining position relationship between the part and the tool electrode in an embodiment of the present invention;

[0030] Figure 7 View of the part before electrical discharge machining preparation in an embodiment of the present invention;

[0031] Figure 8 Machining state diagram of step A in an embodiment of the present invention;

[0032] Figure 9 Machining state diagram of step B in an embodiment of the present invention;

[0033] Figure 10 Machining state diagram of step C in an embodiment of the present invention;

[0034] Figure 11 Machining state diagram of step D in an embodiment of the present invention;

[0035] Figure 12 Machining state diagram of the planar electrode in an embodiment of the present invention;

[0036] Figure 13 Electrical discharge machining process diagram between the first electrode head and the part in an embodiment of the present invention;

[0037] Figure 14 Machining process diagram between the first electrode head and the part in step C in an embodiment of the present invention.

[0038] In the figure: 100 - part; 101 - part shape A; 102 - part shape B; 103 - part shape C; 104 - part shape D; 105 - part shape E; 106 - first intermediate boss; 107 - first edge boss; 108 - support bottom surface; 109 - second intermediate boss; 110 - second edge boss; 111 - third intermediate boss; 112 - first transition surface; 113 - third edge boss; 114 - second transition surface; 115 - fourth intermediate boss; 116 - sharp corner; 117 - rough machining allowance; 118 - electrical discharge machining part;

[0039] 200 - electrode head; 201 - electrode shape A; 202 - electrode shape B; 203 - electrode shape C; 204 - electrode shape D; 205 - electrode shape E;

[0040] 300 - tool electrode; 301 - first electrode head; 302 - first intermediate through hole; 303 - first edge through hole; 304 - second electrode head; 305 - second intermediate through hole; 306 - second edge through hole; 307 - first actual side allowance; 308 - second actual side allowance; 309 - electrode clamping position; 310 - planar electrode. Detailed implementation mode

[0041] As shown in Figures 4 - 14 the figure, this embodiment provides a processing method for precision parts in a communication connector mold, including the following steps:

[0042] Step 1: Processing of the first electrode head 301. The shape of the part 100 is as shown in Figure 1 the figure. First, a first edge through hole 303 and a first middle through hole 302 that match the part shape A101 and the part shape B102 are processed on an old electrode head, and the first middle through hole 302 is enlarged by 0.015 mm as a whole relative to the part shape B102; secondly, the shape corresponding to the part shape C103 on the old electrode head is cancelled, and both the first edge through hole 303 and the first middle through hole 302 on the old electrode head are through holes penetrating the old electrode head, and the first electrode head 301 is obtained, as shown in Figure 4 the figure.

[0043] Step 2: Processing of the second electrode head 304. A second edge through hole 306 and a second middle through hole 305 that match the part shape A101 and the part shape B102 are processed on another old electrode head, and the second edge through hole 306 is enlarged by 0.01 mm as a whole relative to the part shape A101. Both the second edge through hole 306 and the second middle through hole 305 on the old electrode head are through holes penetrating the old electrode head, and then the second electrode head 304 is obtained, as shown in Figure 5 the figure.

[0044] Step 3: Dock the long sides of the above-mentioned first electrode head 301 and the second electrode head 304 together. Array the first edge through hole 303 and the first middle through hole 302 along the width direction of the first electrode head 301, and array the second edge through hole 306 and the second middle through hole 305 along the width direction of the second electrode head 304. The array distance and number are determined according to the actual electrical discharge machining requirements; then, a lateral electrode clamping position 309 is added to one side of the long side of the first electrode head 301 after the array is completed, and finally a side-bound tool electrode 300 with two different electrode heads is formed, as shown in Figure 6 the figure.

[0045] Step 4: Determine the discharge gap between the first electrode head 301 and the second electrode head 304. The discharge gap of the first electrode head 301 is determined by the projected distance of the part shape B102 on the Z-plane horizontal and the loss of the edge of the first electrode head 301 during the electrical discharge machining process; assuming the projected distance of the part shape B102 on the Z-plane horizontal is W, and the loss of the edge of the first electrode head 301 during the electrical discharge machining process is R, then the discharge gap of the first electrode head 301 is W - R. In this embodiment, the projected distance W of the part shape B102 on the Z-plane horizontal = 0.05 mm, and the loss R of the edge of the first electrode head 301 during the electrical discharge machining process = 0.01 mm, then the discharge gap of the first electrode head 301 is 0.05 - 0.01 = 0.04 mm.

[0046] The discharge gap of the second electrode head 304 is determined by the required size of the sharp angle 116 at the part shape D104 on the part 100, and its purpose is to avoid damage to the edge of the electrode head 200 caused by a large amount of flat movement during electrical discharge machining, thus affecting the control of the size of the sharp angle 116.

[0047] In this embodiment, the required size of the sharp angle 116 of the shape 4 on the part 100 is R0.015 max, then the discharge gap of the second electrode head 304 is 0.01 mm.

[0048] Step 5: Machining of the tool electrode 300. The overall material of the tool electrode 300 is selected as tungsten copper or chromium copper; first, all the external dimensions of the tool electrode 300 are accurately machined by a precision grinding machine, and the parallelism and perpendicularity between surfaces are ensured; then, the processing of the tool electrode 300 is completed by a precision slow wire cutting machine using the processing technology of cutting two and trimming six (coarse cutting two passes, fine trimming six passes); the reduction amount of the precision slow wire cutting for the first electrode head 301 and the second electrode head 304 is equal to the corresponding discharge gap in Step 4, the tolerance is controlled at 0 to 0.005 mm, and the surface is controlled at Ra0.15 to Ra0.20.

[0049] Step 6: Processing of the part 100. All the external dimensions of the part 100 are accurately machined by a precision grinding machine; when the grinding machine processes the top surface of the part 100, a rough machining allowance 117 of 0.03 mm needs to be left. The part 100 has an electrical discharge machining part 118, as Figure 7 shown.

[0050] The main purpose of leaving the allowance is to solve the problem of explosion damage to the edges of the part shape A101 and the part shape B102 on the part 100 during the electrical discharge machining process.

[0051] Step 7: Install the tool electrode 300 and the part 100 on the electrical discharge machine table.

[0052] Step 8 (Step A): As Figure 13, first, use the first electrode tip 301 on the tool electrode 300 to vertically move downward along the Z-axis and adopt a machining method without translation to pre-machine the part 100 to a depth of 0.02 mm, so that a first intermediate boss 106 and a first edge boss 107 are formed on the part 100, obtaining the shape of the part 100 as shown in Figure 8 ; then remove the part 100 from the machine table, measure the first actual side allowance 307 of the first intermediate boss 106 and the second actual side allowance 308 of the first edge boss 107, and adjust the electric discharge machining parameters for deviation compensation according to the difference between the first actual side allowance 307 of the first intermediate boss 106 and the first theoretical side allowance, and the difference between the second actual side allowance 308 of the first edge boss 107 and the second theoretical side allowance, so that the part 100 achieves the optimal machining effect. This provides a guarantee for further machining quality and also avoids the scrapping of the part 100 caused by different factors.

[0053] In the above embodiment, the first theoretical side allowance of the first intermediate boss 106 is the projection distance of the first transition surface 112 on the Z-direction horizontal plane plus the avoidance distance of 0.015 mm between the fourth intermediate boss 115 and the first electrode tip 301; the second theoretical side allowance of the first edge boss 107 is the projection distance of the second transition surface 114 on the Z-direction horizontal plane.

[0054] Step 9 (Step B): According to the optimal electric discharge machining data obtained after the electric discharge pre-machining in Step 8, continue to use the first electrode tip 301 on the tool electrode 300 to vertically move downward along the Z-axis to perform further electric discharge machining on the part 100. At the same time, adopt a circular translation machining method to machine the support bottom surface 108 of the part 100. On the basis of the first intermediate boss 106 and the first edge boss 107, a second intermediate boss 109 and a second edge boss 110 are formed on the support bottom surface 108, obtaining the shape of the part 100 as shown in Figure 9 ;

[0055] Step 10 (Step C): As shown in Figure 13 and Figure 14 , immediately following Step 9, let the first electrode tip 301 on the tool electrode 300 perform spiral taper reduction electric discharge machining upward along the Z-axis from the bottom surface 5 of the part 100, which will machine the second intermediate boss 109 into a third intermediate boss 111 and a first transition surface 112, and machine the second edge boss 110 into a third edge boss 113 and a second transition surface 114. The third intermediate boss 111 and the support bottom surface 108 are transitioned through the first transition surface 112, and the third edge boss 113 and the support bottom surface 108 are transitioned through the second transition surface 114, obtaining the shape of the part 100 as shown in Figure 10 ;

[0056] As shown in Figure 13As shown in the figure, α is the tilt angle, β is the helix angle, H is the final EDM height, W is the maximum horizontal movement of EDM, △h is the EDM height for one turn of the helix angle β rising spirally following the tilt angle α, and △w is the horizontal movement of EDM for △h when the helix angle β rises spirally following the tilt angle α; △w is also the reduction of W, that is, as △h rises, △w gradually expands and W gradually shrinks until △w = W, and then this section of EDM is completed. The magnitude of the helix angle β determines the inclination of the spiral. The smaller the helix angle β, the smaller △h and △w, the better the EDM effect, and the higher the shape replication accuracy and approximation. By reasonably controlling the value of the helix angle β, the ideal EDM effect can be achieved. Above, the current IP in EDM is set to start machining from 0.4A and end at 0.1A, and the corresponding surface roughness is set to start machining from Ra0.80 and end at Ra0.16.

[0057] Step 11 (Step D): Use the second electrode head 304 on the tool electrode 300 to machine vertically downward along the Z-axis in a circular translation machining mode to the support bottom surface 108 on the part 100, machine the third intermediate boss 111 into the fourth intermediate boss 115, and remove the first transition surface 112, so that a sharp angle 116 is formed between the fourth intermediate boss 115 and the support bottom surface 108, retain the third edge boss 113 and the second transition surface 114, and complete the EDM of the part shape B102 and the part shape B102 on the part 100, and obtain the shape of the part 100 as Figure 11 shown.

[0058] Step 12: As Figure 12 shown, use the planar electrode 310 to perform EDM removal machining on the rough machining allowance 117 on the part 100. The part shape A101 corresponds to the third edge boss 113, the part shape B102 corresponds to the fourth intermediate boss 115, the part shape C103 corresponds to the second transition surface 114, the part shape D104 corresponds to the sharp angle 116 between the fourth intermediate boss 115 and the support bottom surface 108, and the part shape E105 corresponds to the support bottom surface 108, thereby completing the machining of the core precision part 100 in the high-speed communication connector mold.

[0059] In terms of the tool electrode 300, the present invention splits the old electrode that could only be manufactured by CNC machining in the conventional method into two different electrode heads 200 that can be processed by wire electrical discharge machining (WEDM) with relatively stable machining and higher precision. At the same time, the two electrode heads 200 are combined together to form a tool electrode 300 with two different electrode heads 200. The advantage of this is that the tool electrode 300 can be completed by WEDM at one time, and the shape accuracy, dimensional accuracy, surface finish, shape consistency, and relative position accuracy between shapes on the tool electrode 300 can be guaranteed; during electrical discharge machining, there is no need to replace the tool electrode 300 multiple times, avoiding the machining errors and machining seams generated during the replacement of the two different electrode heads 200; this also provides a strong guarantee for subsequent electrical discharge machining. In addition, it saves the cost of CNC milling cutters, reduces the machining manufacturing difficulty and machining cost of the tool electrode 300, and avoids the time waste and quality problems caused by repeated corrections between CNC and electrical discharge machining.

[0060] In terms of electrical discharge machining, the present invention obtains the optimal electrical discharge machining data by increasing the head allowance on the pre-machined part 100 of electrical discharge machining, providing a guarantee for further machining quality. In addition, since the C-corner structure is cancelled on the first electrode head 301, the shape of the electrode head 200 is different from the shape on the part 100 to be machined. In principle, it is impossible to machine the same shape as on the part 100 by using this electrode head 200 through electrical discharge machining. However, the present invention realizes the machining of the part 100 shape with an electrode head 200 whose shape is not completely the same as that on the part 100 to be machined by changing the machining feed direction of conventional electrical discharge machining and the relationship between the jogging and the trajectory, changing the conventional method that electrical discharge machining must provide an electrode head 200 with a reverse shape completely the same as the shape of the part 100 to perform electrical discharge machining.

[0061] In summary, by changing the machining manufacturing method of the tool electrode 300 and the machining method of electrical discharge machining, the present invention makes it feasible to mass-produce the part 100, greatly improves the machining yield, the quality of the part 100 is stable without scrap, the accuracy is guaranteed, the technical life cycle is long, bringing a positive effect to the injection molding production yield and production efficiency of subsequent products. For the machining of parts 100 in this type of high-value-added high-speed communication connector mold, it has high economic benefits and is highly competitive in the industry.

[0062] In the description of the present invention, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, and may be fixedly connected, detachably connected, or integrated; may be mechanically connected or electrically connected; may be directly connected or indirectly connected through an intermediate medium, may be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood. In addition, the specific features, structures, etc. described in the embodiments are included in at least one embodiment. Under the condition that there is no contradiction, those skilled in the art may combine the features of different embodiments. The protection scope of the present invention is not limited to the above-mentioned specific embodiments. According to the basic technical concept of the present invention, the embodiments that can be associated with by ordinary technicians in this field without creative work all belong to the protection scope of the present invention.

Claims

1. A processing method for precision parts in a communication connector mold, characterized in that, It includes the following steps: Step A: Use the first electrode head (301) to vertically move downward along the Z-axis and pre-process the part (100) in a non-translational machining method, so that a first intermediate boss (106) and a first edge boss (107) are formed on the part (100). A first intermediate through hole (302) and a plurality of first edge through holes (303) are provided on the first electrode head (301). The plurality of first edge through holes (303) are arranged on the circumference of the first intermediate through hole (302). The first intermediate boss (106) matches the first intermediate through hole (302), and the first edge boss (107) matches the first edge through holes (303). Step B: Use the first electrode head (301) to continue to move vertically downward along the Z-axis and machine the support bottom surface (108) of the part (100) in a circular translational machining method. On the basis of the first intermediate boss (106) and the first edge boss (107), a second intermediate boss (109) and a second edge boss (110) are formed on the support bottom surface (108). Step C: Use the first electrode head (301) to perform spiral tapered reduction electrical discharge machining upward along the Z-axis starting from the support bottom surface (108) of the part (100). The second intermediate boss (109) will be machined into a third intermediate boss (111) and a first transition surface (112), and the second edge boss (110) will be machined into a third edge boss (113) and a second transition surface (114). The third intermediate boss (111) and the support bottom surface (108) are transitioned through the first transition surface (112), and the third edge boss (113) and the support bottom surface (108) are transitioned through the second transition surface (114). Step D: Use the second electrode head (304) to move vertically downward along the Z-axis and machine to the support bottom surface (108) of the part (100) in a circular translational machining method. The third intermediate boss (111) is machined into a fourth intermediate boss (115), and the first transition surface (112) is removed, so that a sharp angle (116) is formed between the fourth intermediate boss (115) and the support bottom surface (108). The third edge boss (113) and the second transition surface (114) are retained. A second intermediate through hole (305) and a plurality of second edge through holes (306) are provided on the second electrode head (304). The plurality of second edge through holes (306) are arranged on the circumference of the second intermediate through hole (305). The size of the second edge through holes (306) is larger than the size of the second intermediate boss (109). After the pre-processing of the part (100) is completed, measure the first actual side allowance (307) of the first intermediate boss (106) and the second actual side allowance (308) of the first edge boss (107). Adjust the electrical discharge machining parameters for deviation compensation according to the difference between the first actual side allowance (307) of the first intermediate boss (106) and the first theoretical side allowance and the difference between the second actual side allowance (308) of the first edge boss (107) and the second theoretical side allowance.

2. The processing method of precision parts in the communication connector mold according to claim 1, characterized in that, During the process of spiral conical reduction electrical discharge machining with the first electrode head (301) moving upward along the Z-axis, α is the inclination angle, β is the helix angle, H is the final electrical discharge machining height, W is the maximum horizontal movement of the electrical discharge, △h is the electrical discharge machining height for one turn of the helix angle β following the inclination angle α in spiral conical ascent, and △w is the horizontal movement of the electrical discharge for machining △h when the helix angle β follows the inclination angle α in spiral conical ascent. △w gradually expands as △h increases while W gradually decreases. When △w = W, the machining of this section of the electrical discharge is completed.

3. The processing method of the precision parts in the communication connector mold according to claim 1, characterized in that, The first theoretical side allowance of the first intermediate boss (106) is the projection distance of the first transition surface (112) on the Z-axis horizontal plane plus the clearance distance between the fourth intermediate boss (115) and the first electrode head (301); the second theoretical side allowance of the first edge boss (107) is the projection distance of the second transition surface (114) on the Z-axis horizontal plane.

4. The processing method of precision parts in the communication connector mold according to claim 1, characterized in that, Both the first electrode head (301) and the second electrode head (304) are used electrodes.

5. The processing method of precision parts in the communication connector mold according to claim 1, characterized in that, The long sides of the first electrode head (301) and the second electrode head (304) are connected to form a tool electrode (300), and an electrode clamping position (309) is provided at one end of the tool electrode (300).

6. The processing method of the precision parts in the communication connector mold according to claim 5, characterized in that, The material of the tool electrode (300) is tungsten copper or chromium copper.

7. The machining method of the precision parts in the communication connector mold according to claim 6, characterized in that, The machining method of the tool electrode (300) includes: machining all the external dimensions of the tool electrode (300) on the blank electrode by a precision grinding machine and ensuring the parallelism and perpendicularity between surfaces; then using a precision slow wire cutting machine to complete the shape machining of the first electrode head (301) and the second electrode head (304) with a machining process of cutting two and repairing six.

8. The processing method of the precision parts in the communication connector mold according to claim 1, characterized in that, Before pre-machining the part (100), a precision grinding machine is used to machine all the external dimensions of the part (100), and a rough machining allowance (117) is left on the machining top surface of the part (100).

9. The processing method of the precision parts in the communication connector mold according to claim 8, characterized in that, After the second electrode head (304) is machined using the circular translation method, a planar electrode (310) is used to remove the rough machining allowance (117).

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