A processing method of a large-scale die-casting mold slide block seat

Abstract

The application discloses a processing method of a large-sized die-casting mold sliding block seat, and comprises the following steps: S1, cutting an initial blank, the initial blank is composed of two embryo blanks which are mirror images of each other, and the embryo blank has upper and lower end faces and a side face; S2, rough machining of the upper and lower end faces and the side face of the embryo blank; S3, quenching and tempering and hardness detection in a factory, a surface layer with a thickness of a is formed on the surface of the embryo blank after quenching and tempering, and 15<=a<=20mm; S4, semi-finishing machining of the upper and lower end faces and the side face; S5, finishing machining of the upper and lower end faces and the side face; S6, leading holes are respectively formed on two opposite side faces through CNC machining, the depth of the leading hole is b, and 1.5a<=b<=3a; S7, two-side punching is performed through deep hole drilling and alignment of the leading hole, and deep hole machining is completed; S8, CNC side face bevel machining; and S9, drilling and tapping. The application provides a processing method of a large-sized die-casting mold sliding block seat, which shortens a processing cycle and reduces manufacturing cost under the premise of ensuring machining precision.

Description

Technical Field

[0001] This invention relates to the field of mold component processing technology, and more specifically, to a processing method for a large die-casting mold slider seat. Background Technology

[0002] As an indispensable key component in automotive die-casting molds, the slider seat has a close working relationship with many other related parts of the mold. This makes the design structure of the slider seat extremely complex, and the requirements for the relative positional accuracy and dimensional tolerances of each design component become exceptionally stringent. With the continuous evolution of automotive parts, the size of die-casting molds has gradually increased, causing a series of problems, especially posing new challenges to the design and manufacturing of slider seats. The increase in die-casting mold volume has led to a significant increase in the size of the slider seat, with a single slider seat often weighing several tons. This places more stringent requirements on the manufacturing and use of the slider seat. Correspondingly, the length of screw holes and other components on the slider seat has been extended, with hole depths exceeding 600mm.

[0003] Existing deep hole machining technologies for slider seats include: (1) Machining is usually carried out using a combination of a machining center and a radial drilling machine. Because the radial drilling machine cannot achieve precise positioning and the hole depth is large, the centrifugal force generated during machining is quite large, which affects the roundness, perpendicularity and surface finish of the screw through hole. Since the countersunk hole and the screw through hole are machined separately by two different precision equipment, the concentricity of the hole cannot be effectively guaranteed, which affects the machining accuracy and prolongs the machining cycle.

[0004] (2) Deep hole drilling equipment is used for processing alone. However, deep hole drilling equipment has the problem of accurate positioning, which makes it impossible to effectively control the tolerance of the hole position.

[0005] The aforementioned problems make traditional processing methods significantly inadequate in ensuring the quality and accuracy of the slider seat. Summary of the Invention

[0006] This invention aims to address one of the technical problems in related technologies to a certain extent. To this end, this invention proposes a machining method for a large die-casting mold slider seat. This method involves pre-machining pilot holes on both sides using CNC technology after heat treatment, and then using these pilot holes as a reference, machining deep holes on both sides using a deep hole drill. This method not only ensures high machining precision but also effectively shortens the machining cycle and reduces manufacturing costs.

[0007] The technical solution adopted in this invention is: to provide a processing method for a large die-casting mold slider seat, comprising the following steps: S1: Initial blank, which is composed of two blanks with mirror-like structures joined together. The blanks have upper and lower end faces and side faces. S2: The upper and lower end faces and sides of the rough-machined blank; S3: Heat treatment and hardness test at the factory. After heat treatment, a surface layer with a thickness of a is formed on the surface of the blank, 15≤a≤20mm. S4: Semi-finished upper and lower end faces and side faces; S5: Finish machining of the upper and lower end faces and sides; S6: The pilot holes are machined from two opposite sides using CNC machining. The pilot hole depth is b, and 1.5a≤b≤3a. S7: Drill holes on both sides of the pilot hole using a deep hole drill to complete the deep hole machining; S8: CNC side bevel machining; S9: Drilling and tapping.

[0008] Compared with traditional methods, the above method has the following advantages: 1. The mirror-image slider blanks are spliced ​​together during material preparation, thereby reducing raw material waste. By completing the clamping in one go in the same process, production efficiency is improved and the possibility of processing errors is reduced.

[0009] 2. Rough machining before tempering offers several advantages. Firstly, it reduces the weight of the workpiece during tempering, as heat treatment costs are typically calculated based on workpiece weight. Secondly, the lower hardness of the workpiece before tempering makes cutting easier and reduces tool wear. In contrast, tempering increases the surface hardness of the workpiece, significantly reducing cutting efficiency and increasing tool wear. Furthermore, excessive cutting depth or time can cause internal stress to re-emerge in the workpiece, leading to secondary deformation, uneven surface hardness, prolonged machining time, increased machining costs, and extended production cycles.

[0010] 3. For the positional error of deep holes in large workpieces (including screw holes with a depth exceeding 600mm), traditional designs allow a deviation of approximately ±0.15mm; while the machining error of CNC equipment is typically within ±0.02mm. Therefore, using a CNC machine to first machine pilot holes, setting the pilot hole diameter tolerance to +0.05~+0.03mm, ensures that the drill bit of the deep hole drilling equipment can be quickly inserted into the pilot hole and achieve accurate positioning and machining. Using professional deep hole drilling equipment ensures the surface finish, diameter tolerance, and machining efficiency of the holes. This optimized solution emphasizes precision and efficiency and improves the overall manufacturing quality of large die-casting mold slide seats.

[0011] 4. Setting the pilot hole after tempering not only ensures the accuracy of the pilot hole but also avoids machining errors caused by uneven hardness. Furthermore, by performing pilot hole machining after tempering, the internal structure can be optimized without affecting the surface hardness, thereby improving the overall performance and durability of the slider seat. If pilot hole machining is performed before tempering, the slight deformation of the material during tempering may affect the positional accuracy of the pilot hole. Thermal expansion and contraction during tempering can cause slight displacement of the hole position, which is unacceptable in precision machining. Therefore, the correct order is tempering first, followed by pilot hole machining, to ensure the accuracy and position of the pilot hole.

[0012] 5. Controlling the depth b of the pilot hole to 1.5a ≤ b ≤ 3a is crucial. If the pilot hole is too shallow, i.e., b < 1.5a, the deep hole drill bit may not be able to be effectively positioned during deep hole machining, resulting in insufficient machining accuracy. In addition, an excessively shallow pilot hole may not provide sufficient guidance for the deep hole drill, increasing the risk of drill deviation.

[0013] Conversely, if the pilot hole is too deep, i.e. b>3a, although it can provide better guidance, it will also increase the amount of CNC machining, thereby increasing machining costs and extending the delivery cycle.

[0014] According to an embodiment of the present invention, step S7 includes: S71: The first connecting hole is machined using deep hole drilling. The depth of the first connecting hole is c1, and the radius is r1. This is to provide accurate positioning for structural assembly and ensure precise alignment of the slider seat during the overall assembly process. The high-precision machining using deep hole drilling ensures the dimensional accuracy of the first connecting hole, which facilitates seamless integration of subsequent processes. S72: A second connecting hole is drilled by deep hole drilling. The depth of the second connecting hole is c2 and the radius is r2, where c1 > c2. S73: A guide hole is machined by deep hole drilling. The guide hole has a depth of c3 and a radius of r3, where c3 ≤ c1 and r3 ≥ 2r1. The guide hole is located between the first connecting hole and the second connecting hole. The guide hole is designed to provide precise guidance for the movement of the slider seat, ensuring that unnecessary friction or offset does not occur during use. Because the machining radius of the guide hole is larger than that of the first and second connecting holes, excessive thermal stress concentration generated during the pre-machining of the guide hole is avoided, which could potentially cause deformation of the first and second connecting holes.

[0015] According to one embodiment of the present invention, in step S4, a test tool position is pre-machined on the side where the inclined surface is located, and the test tool position serves as the reference surface for the inclined surface machining in step S8. This can effectively avoid errors and offsets in subsequent inclined surface machining, ensuring that subsequent CNC side inclined surface machining can be performed accurately.

[0016] According to one embodiment of the present invention, in step S5, the surface hardness is HRC29-33.

[0017] According to one embodiment of the present invention, the first connecting hole includes a first countersunk hole and a first screw through hole, and the drilling and tapping in step S9 includes tapping the first screw through hole. The first connecting hole is the screw hole, and the first screw through hole is responsible for allowing the screw to pass through and connect to the other side. Step S9 focuses on tapping the first screw through hole to ensure that the screw can be firmly fixed in this connecting hole.

[0018] According to one embodiment of the present invention, the second connecting hole includes a second countersunk hole and a second screw through hole, and the drilling and tapping in step S9 includes tapping the second screw through hole.

[0019] According to one embodiment of the present invention, in step S2, a frame groove is pre-milled on one side of the blank, and the opening at one end of the guide hole is located at the bottom of the frame groove. The length and width dimensions of the frame groove are machined in one operation. This machining concept has the following advantages: First, we prioritize performing as many machining items as possible in the roughing process before stress relief, because the unit hourly cost of roughing equipment is lower than that of finishing equipment, approximately half. This strategy not only reduces production costs but also reduces the amount of machining in subsequent stress relief processes, effectively reducing the probability of internal stress generation, preventing further deformation, and maximizing the stress relief effect of heat treatment. Second, by optimizing the toolpath in the three levels of roughing, semi-finishing, and finishing, we can improve production efficiency while ensuring product manufacturing quality. In roughing and semi-finishing, after each pass, the tool needs to be lifted to a safe height before re-entering the tool for machining; while in finishing, to meet the accuracy requirements, a more efficient toolpath can be used, eliminating the need for tool lifting interruptions and allowing for continuous machining to the customer's design dimensions. The core idea behind this strategy is to fully utilize the characteristics of different processing levels, optimize processes, and improve overall production efficiency. Finally, the reason for not lifting the tool is that an oxide layer forms after stress relief, and to ensure the frame's aesthetic appearance, this oxide layer needs to be removed during finishing. Therefore, even if tool bounce or vibration might cause the frame walls to be less aesthetically pleasing during the semi-finishing process, it will not have a significant impact on product quality. This meticulous process adjustment ensures that production efficiency is improved while maintaining the product's beautiful appearance.

[0020] According to one embodiment of the present invention, in step S2, an allowance of 8-9 mm is reserved in the thickness direction of the upper and lower end faces and the side faces of the blank.

[0021] According to one embodiment of the present invention, in step S4, a semi-finishing thickness allowance of 0.4-0.5 mm is reserved. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a perspective view of two slider seats being joined together in an embodiment of the present invention; Figure 2 This is a perspective view of the slider seat in an embodiment of the present invention; Figure 3 This is a schematic diagram of the slider seat in an embodiment of the present invention; Figure 4 This is a process flow diagram of the processing method in an embodiment of the present invention; Figure 5 This is a graph showing the conditioning process in an embodiment of the present invention.

[0024] Explanation of the labels in the diagram: 1. Slider base; 11. First connecting hole; 12. Guide hole; 13. Bevel; 14. Second connecting hole; 15. Test cutter position; 16. Frame groove; 11a. First countersunk hole; 11b. First screw through hole; 14a, Second countersunk hole; 14b, Second screw through hole. Detailed Implementation

[0025] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0026] In this embodiment, a hole depth exceeding 600 mm is considered a deep hole. Example

[0027] like Figure 1-3 As shown, this embodiment discloses a processing method for a large die-casting mold slider seat 1, including the following steps: S1: Initial blank, which is composed of two blanks with mirror-like structures joined together. The blanks have upper and lower end faces and side faces. S2: The upper and lower end faces and sides of the rough-machined blank; S3: Heat treatment and hardness test at the factory. After heat treatment, a surface layer with a thickness of a is formed on the surface of the blank, 15≤a≤20mm. S4: Semi-finished upper and lower end faces and side faces; S5: Finish machining of the upper and lower end faces and sides; S6: The pilot holes are machined from two opposite sides using CNC machining. The pilot hole depth is b, and 1.5a≤b≤3a. S7: Drill holes on both sides of the pilot hole using a deep hole drill to complete the deep hole machining; S8: CNC side bevel machining 13; S9: Drilling and tapping.

[0028] Furthermore, in this embodiment, in step S1, two independent blanks are first spliced ​​together to form a preliminary blank. Then, in step S2, the upper surface, front and rear sides, and left and right sides of the preliminary blank are rough-machined, and then the lower surface of the preliminary blank is rough-machined. Finally, the two blanks are separated, and the opposite sides of the two preliminary blanks are rough-machined respectively.

[0029] In other embodiments, step S1 involves first combining two independent blanks to form a monolithic preliminary blank. Then, in step S2, the upper surface, front and rear sides, and left and right sides of the preliminary blank are rough-machined, followed by rough-machined lower surface. Finally, the two blanks are separated, and the opposing sides of each preliminary blank are rough-machined.

[0030] Furthermore, step S2 includes machining process eye bolt holes on the billet for installing lifting eyelets. Since the billet weighs several tons or even tens of tons, the installation of lifting eyelets facilitates the lifting of the billet.

[0031] Furthermore, in this embodiment, the surface layer with thickness 'a' specifically refers to a surface layer with uniform hardness distribution, where the hardness gradually decreases from the surface to the interior of the blank.

[0032] Specifically, step S7 includes: S71: The first connecting hole 11 is drilled by deep hole drilling. The depth of the first connecting hole 11 is c1 and the radius is r1. S72: The second connecting hole 14 is drilled by deep hole drilling. The depth of the second connecting hole 14 is c2 and the radius is r2, where c1 > c2. S73: A guide hole 12 is machined by deep hole drilling. The guide hole 12 has a depth of c3 and a radius of r3, where c3 ≤ c1 and r3 ≥ 2r1. The guide hole 12 is located between the first connecting hole 11 and the second connecting hole 14. The guide hole 12 is designed to provide precise guidance for the movement of the slider seat 1, ensuring that unnecessary friction or offset does not occur during use. Because the machining radius of the guide hole 12 is larger than that of the first connecting hole 11 and the second connecting hole 14, excessive thermal stress concentration generated during the pre-machining of the guide hole 12 is avoided, which could potentially cause deformation of the first connecting hole 11 and the second connecting hole 14.

[0033] Furthermore, since CNC equipment is not suitable for machining large-diameter deep holes (greater than 4D in diameter of the tool), in this embodiment, the inner diameter r3 of the guide hole 12 is ≥120mm and c3 is ≥610mm, making it unsuitable to directly machine the guide hole 12 using CNC equipment. Therefore, in this embodiment, a CNC machine is used to machine pilot holes on both sides of the tempered blank, and then a deep hole drill is used to align the pilot holes and machine the first connecting hole 11, the second connecting hole 14, and the guide hole 12 on both sides.

[0034] Furthermore, combined Figure 1-2 As shown, a frame groove 16 is formed on one side of the slider seat 1, and one end of the guide hole 12 is located within the frame groove 16. A portion of the multiple first connecting holes 11 are located within the frame groove 16, such that the hole depth c1 of this portion of the first connecting holes 11 is equal to the hole depth c3 of the guide hole 12. The remaining portion of the first connecting holes 11 is located on the edge of the frame groove 16, resulting in a hole depth greater than c3, reaching over 710 mm. Therefore, c3 ≤ c1.

[0035] Specifically, in step S4, a test tool position 15 is pre-machined on the side where the inclined surface 13 is located. The test tool position 15 serves as the reference surface for machining the inclined surface 13 in step S8. This effectively avoids errors and offsets in the subsequent machining of the inclined surface 13, ensuring that the subsequent CNC machining of the side inclined surface 13 can be performed accurately.

[0036] Furthermore, the side surface where the inclined surface 13 is located is a surface that has undergone precision machining. This side surface is a vertical surface, which facilitates the machining of the second connecting hole 14. If the inclined surface 13 is machined first and then the second connecting hole 14 is drilled, the angle of the hole opening may be affected during drilling. Therefore, the second connecting hole 14 is pre-machined, a test tool position 15 is machined on the side surface, and finally the inclined surface 13 is machined using the test tool position 15 as a reference surface.

[0037] Specifically, in step S5, the surface hardness is HRC29-33.

[0038] Specifically, the first connecting hole 11 includes a first countersunk hole 11a and a first screw through hole 11b. The drilling and tapping in step S9 includes tapping the first screw through hole 11b. The first connecting hole 11 is the screw hole, and the first screw through hole 11b is responsible for allowing the screw to pass through and connect to the other side. Step S9 focuses on tapping the first screw through hole 11b to ensure that the screw can be securely fixed in the first connecting hole 11.

[0039] Specifically, the second connecting hole 14 includes a second countersunk hole 14a and a second screw through hole 14b, and the drilling and tapping in step S9 includes tapping the second screw through hole 14b.

[0040] Specifically, in step S2, a frame groove 16 is pre-milled on one side of the blank, and the opening at one end of the guide hole 12 is located at the bottom of the frame groove 16.

[0041] Specifically, in step S2, an allowance of 8-9 mm is reserved in the thickness direction of the upper and lower end faces and the side faces of the blank.

[0042] Specifically, in step S4, a 0.4-0.5mm allowance is reserved for the semi-finished thickness.

[0043] Combination Figure 4 As shown, the processing method of a large die-casting mold slider seat 1 in this embodiment specifically includes the following steps: Step 1: Initial blanking. The initial blank is composed of two blanks with mirror-like structures joined together. The blanks have upper and lower end faces and side faces. Rough milling is performed on all six sides of the initial blank, leaving 8-9mm in the thickness direction and 8-10mm in the length and width. That is, 8-9mm machining allowance is reserved on the upper and lower end faces of the blank, and 8-10mm machining allowance is reserved on the front and rear side faces and the left and right side faces. Step 2: Incoming material inspection; Step 3: Machining process for lifting eye bolt holes; Step 4: Mill out a rough planar frame on the upper and lower end faces and sides of the blank, and mill out the frame groove 16; Step 5: Conditioning and hardness testing at the factory. After conditioning, a surface layer with a thickness of 'a' is formed on the surface of the blank, where 15≤a≤20mm and the surface hardness is HRC29-33. Step 6: Finish mill the six sides, leaving 0.3-0.5mm in the thickness direction and 0.4-0.5mm in the length and width. Pre-machine a test tool position 15 on the side where the inclined surface 13 is located. The test tool position 15 serves as the reference surface for machining the inclined surface 13 in step S8. Step 7: CNC machine pilot holes from two opposite sides. The pilot hole depth is b, and 1.5a ≤ b ≤ 3a. Since the thickness of the skin is a during the tempering process, the hardness gradually decreases from the skin to the core of the blank. When the pilot hole depth is less than 1.5a, the hardness is too high, which is not conducive to the subsequent deep hole drilling and affects the cutting efficiency. In addition, the uneven hardness distribution from the bottom of the pilot hole to the core of the blank can easily affect the perpendicularity of the hole drilled by the deep hole drill. When the pilot hole is greater than 3a, the CNC equipment is not suitable for machining this kind of deep hole. Therefore, the value of the surface thickness a is used on the one hand to form a uniform hard layer on the surface of the large die-casting mold slider seat 1, and on the other hand, it is considered by the deep hole factor. Step 8: Machining of the planar hole frame. Using a deep hole drill, drill holes on both sides of the pilot hole to complete the deep hole machining. Machining the first countersunk hole 11a, the first screw through hole 11b, the second countersunk hole 14a, and the second screw through hole 14b on the slider seat 1 respectively. Step 9: Coordinate Measuring and Coordinate System Inspection; Step 10: Based on the results of the coordinate measuring machine (CMM) inspection, precision mill the upper and lower end faces and the side faces using CNC milling until they are in place. Step 11: Based on the results of the coordinate measuring machine (CMM) inspection, precision mill the inclined plane 13 using CNC milling until it is in place. Step 12: Drilling and tapping; Step 13: Inspect the assembly.

[0044] Specifically, the blank is made of Cr-Mo alloy steel with the grade AISI P20. (Combined) Figure 5 As shown, the tempering steps in step five above are as follows: during quenching, preheat at 500-600℃ for 2-4 hours, then hold at 840℃ for at least 20 hours, cool and temper, and hold at 610℃ for at least 15 hours. The hardness after tempering reaches HRC29-33.

[0045] The above processing method has the following advantages: (1) After adopting the processing method of this application, the position tolerance of the deep hole of the slider seat 1 is controlled within ±0.1mm; the concentricity of the countersunk hole and the screw through hole is 0.03mm; the perpendicularity of the hole is controlled within 0.3 / 1000mm; the hole diameter tolerance is +0.05~0mm; and the hole wall roughness is ≤Ra3.2. (2) After adopting the processing method of this application, the perpendicularity, right angle and parallelism of the slider seat 1 are ≤0.03mm; the perpendicularity of the hole and groove to the reference surface is ≤0.02mm; (3) After adopting the processing method of this application, the first-pass yield of slider seat 1 reaches over 99.3%; (the first-pass yield of traditional processing is <70%). (4) After adopting the processing method of this application, the production cycle of slider seat 1 is shortened by 3 days and the processing efficiency is increased by about 38%; the machining cost of slider seat 1 is reduced by nearly 40% compared with traditional processing.

[0046] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0050] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for machining a large die-casting mold slider seat, characterized in that, Includes the following steps: S1: Initial blank, which is composed of two blanks with mirror-like structures joined together. The blanks have upper and lower end faces and side faces. S2: The upper and lower end faces and sides of the rough-machined blank; S3: Heat treatment and hardness test upon return to the factory. After heat treatment, a surface layer with a thickness of a is formed on the surface of the blank, 15mm≤a≤20mm; S4: Semi-finished upper and lower end faces and side faces; S5: Finish machining of the upper and lower end faces and sides; S6: The pilot holes are machined from two opposite sides using CNC machining. The pilot hole depth is b, and 1.5a≤b≤3a. S7: Drill holes on both sides of the pilot hole using a deep hole drill to complete the deep hole machining. Drill the first connecting hole, the second connecting hole, and the guide hole located between the first connecting hole and the second connecting hole using the deep hole drill. The guide hole has a depth of c3 and c3≥610mm and a radius of r3 and r3≥120mm. S8: Precision milling of the inclined surface using CNC; S9: Drilling and tapping.

2. The processing method of a large die-casting mold slider seat according to claim 1, characterized in that, Step S7 includes: S71: The first connecting hole is drilled by deep hole drilling. The depth of the first connecting hole is c1 and the radius is r1. S72: A second connecting hole is drilled by deep hole drilling. The depth of the second connecting hole is c2 and the radius is r2, where c1 > c2. S73: A guide hole is drilled by deep hole drilling. The guide hole has a depth of c3 and a radius of r3, where c3≤c1 and r3≥2r1. The guide hole is located between the first connecting hole and the second connecting hole.

3. The processing method of a large die-casting mold slider seat according to claim 1, characterized in that, In step S4, a test tool position is pre-machined on the side where the inclined plane is located, and the test tool position serves as the reference surface for the machining of the inclined plane in step S8.

4. The processing method of a large die-casting mold slider seat according to claim 1, characterized in that: In step S5, the surface hardness is HRC29-33.

5. The processing method of a large die-casting mold slider seat according to claim 2, characterized in that: The first connecting hole includes a first countersunk hole and a first screw through hole, and the drilling and tapping in step S9 includes tapping the first screw through hole.

6. The processing method of a large die-casting mold slider seat according to claim 2, characterized in that: The second connecting hole includes a second countersunk hole and a second screw through hole, and the drilling and tapping in step S9 includes tapping the second screw through hole.

7. The processing method of a large die-casting mold slider seat according to claim 2, characterized in that: In step S2, a frame groove is pre-milled on one side of the blank, and the opening at one end of the guide hole is located at the bottom of the frame groove.

8. The processing method of a large die-casting mold slider seat according to claim 1, characterized in that: In step S2, an allowance of 8-9 mm is reserved in the thickness direction of the upper and lower end faces and the side faces of the blank.

9. A method for processing a large die-casting mold slider seat according to claim 1, characterized in that: In step S4, a thickness allowance of 0.4-0.5 mm is reserved for the semi-finished thickness.

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