A processing method for ion membrane skeleton

Abstract

The present invention relates to a processing method for an ion membrane skeleton, and the processing method comprises the following steps: S1, roughing; S2, fine processing. On the one hand, the present invention uses the two end faces of the blank as references to gradually implement roughing, and combines two stress relief treatments, thereby greatly reducing the probability of product deformation during processing, and can accurately control the subsequent processing size and shape and position tolerances; on the other hand, by setting equal-height support columns during rough processing, accurate positioning is provided for subsequent fine processing, effectively reducing the processing difficulty, and at the same time, the support columns are used to support the ribs to ensure that the ribs have sufficient rigidity to meet surface processing.

Description

Technical Field

[0001] The invention belongs to the technical field of precision machining, and in particular relates to a machining method for an ion membrane skeleton. Background Art

[0002] In the semiconductor industry, ion membranes are used to achieve ion exchange, isolation or selective permeation of chemical solutions in processes such as copper plating and corrosion, such as recovering copper ions from corrosion wastewater and purifying electroplating solutions.

[0003] At present, when the ion membrane is used, it is necessary to fix the ion membrane on the frame and cooperate with the corresponding electroplating / corrosion chamber so that the ion membrane can withstand a certain pressure in normal operation without being damaged. The existing ion membrane frame is generally made of PP material to prevent corrosion and prevent contamination of the liquid medicine. The bottom surface of the frame is the matching surface with the chamber, and the top surface is provided with a sealing ring and titanium alloy screws to connect the water pipe on the ion membrane with the waterway on the wall and the external liquid medicine pump connected thereto.

[0004] However, in the actual processing, in order to ensure ion permeability and sealing, the inner cavity of the skeleton needs to be hollowed out, resulting in only thin cavity walls and ribs remaining on the inner wall of the skeleton; at the same time, in order to facilitate the overflow of gas generated on the surface of the ion membrane during use, the top surface of the skeleton needs to be designed as an inclined surface to form an asymmetric structure. Therefore, traditional cutting processing can easily generate asymmetric stress in the roughing stage and cause deformation of the product. In addition, due to the existence of the inclined surface, it is difficult to provide a processing reference, and the processing difficulty is high. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a new processing method for an ion membrane skeleton.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A processing method for an ion membrane skeleton, the processing method comprising the following steps:

[0008] S1, Roughing

[0009] a) placing a cylindrical blank in a heating furnace for heating and heat preservation to remove stress for the first time; then taking out the blank, defining the two end faces of the blank as the first end face and the second end face respectively, wherein the second end face of the blank is used as a positioning reference, and processing the outer circle and height dimensions of the blank; processing inwardly from the first end face to form a plurality of first grooves with gradually decreasing diameters, and processing the center of the bottom of the innermost first groove to form a center hole penetrating to the first end face of the blank;

[0010] b) placing the blank in a heating furnace for heating and heat preservation to remove stress for a second time; then taking out the blank, taking the first end face of the blank as a positioning reference, processing inwardly from the second end face of the blank to form ribs distributed around the center hole, wherein the hollow portion between adjacent ribs is connected with the first groove; then processing to form an inclined surface on the second end face of the blank; finally inserting a plurality of support columns extending along the center line direction of the blank into the hollow portion between adjacent ribs, keeping the end of each support column protruding from the second end face of the blank and flush, and at the same time each support column abuts against and supports the side wall of the rib, completing the roughing and forming a semi-finished product;

[0011] S2. Finishing

[0012] c) According to the requirements of the drawings, all outer circle dimensions and heights of the semi-finished products are processed to the designed dimensions;

[0013] d) Based on the outer circle and height dimensions of the semi-finished product processed in step c), according to the requirements of the drawing, the first groove, center hole, ribs, and inclined surface inside the semi-finished product are processed to the designed dimensions; then, based on the first end surface of the semi-finished product and the plane where the ends of the multiple support columns are located as the positioning references, the threaded holes and inclined holes in the circumferential direction are processed on the first groove and ribs to the designed dimensions respectively;

[0014] e) removing a plurality of support pillars, and performing deburring and cleaning processes in sequence.

[0015] Preferably, in step S1, during the first stress removal and the second stress removal, the temperature in the heating furnace is raised step by step, and the temperature is kept at each stage for a certain period of time.

[0016] Preferably, the maximum temperature in the heating furnace is set to be 10-20° C. lower than the melting temperature of the blank material. Here, the temperature in the heating furnace is heated to 10-20° C. lower than the melting temperature of the blank material by multi-stage high-temperature slow-changing baking, which has the best effect of removing stress.

[0017] Preferably, the temperature is raised by 10 to 20° C. each time, and the insulation time of each stage is 1 to 2 hours.

[0018] Preferably, in step S1, the machining allowances of the outer circle, the height, the first grooves, the second grooves and the center hole on the blank are controlled within 4 mm.

[0019] Preferably, in step b), the machining allowance of the rib is controlled within 2 mm, and the machining allowance of the inclined surface is controlled within 1 mm.

[0020] Preferably, in step b), the inclination angle of the inclined surface is 2° to 5°.

[0021] Preferably, in step b), the plurality of support columns are divided into multiple layers from the inside to the outside, wherein the plurality of support columns in each layer are spaced apart around the center line of the blank. Here, the support effect formed by the plurality of support columns is good, and when the plane where the end portion is located is used as a positioning reference, the accuracy is high, which is conducive to improving the processing accuracy and improving the product yield.

[0022] Preferably, in step b), before machining the ribs, firstly, the first end surface of the blank is used as a positioning reference, a second groove is machined inward from the second end surface of the blank, and the bottom of the second groove is further machined inward to form the ribs.

[0023] Preferably, after the blank is processed in step S1 and step S2, a workpiece #1 is obtained. In step d), assembly grooves need to be processed on both sides of one end face of the rib respectively. The processing method further includes the following steps:

[0024] S3, processing workpiece 2# and workpiece 3#

[0025] According to the requirements of the drawings, workpiece 2# and workpiece 3# are processed to the designed dimensions respectively to obtain sector-shaped inner rings corresponding to the assembly grooves on both sides of the ribs;

[0026] S4. Assembly

[0027] Insert and press the 2# workpiece and the 3# workpiece into the corresponding assembly grooves to obtain the finished ion membrane skeleton.

[0028] In addition, the materials of the 1# workpiece, 2# workpiece, and 3# workpiece are all polypropylene.

[0029] Due to the implementation of the above technical solution, the present invention has the following advantages compared with the prior art:

[0030] Since the inner cavity of the skeleton needs to be hollowed out, only a thin cavity wall remains on the inner wall of the skeleton; at the same time, in order to facilitate the overflow of gas on the surface of the ion membrane during use, the top surface of the skeleton needs to be designed as an inclined surface to form an asymmetric structure. Therefore, traditional cutting processing can easily generate asymmetric stress in the roughing stage and cause deformation of the product. In addition, due to the existence of the inclined surface, it is difficult to provide a processing reference, and the processing difficulty is high. The present application designs an overall processing method for the ion membrane skeleton, ingeniously solving the shortcomings and defects of the prior art. After adopting this processing method, during roughing, the cylindrical blank is first placed in a heating furnace for heating and insulation to remove stress for the first time. After the blank is taken out, one end face is used as a positioning reference for processing the blank in turn. The outer circle and height are processed to form the first groove and the center hole; the blank is then placed in a heating furnace for heating and insulation to remove stress for the second time, the blank is taken out and the second groove, ribs and inclined surface are processed with the other end face as the positioning reference, and multiple support columns are inserted into the ribs as the reference for subsequent processing; then, according to the requirements of the drawing, the outer circle, height, first groove, second groove, center hole, ribs and inclined surface on the semi-finished product are gradually adjusted to the designed size, and then one end face of the semi-finished product and the plane where the ends of multiple support columns are located are used as the positioning reference, and the threaded holes and inclined holes in the circumferential direction are processed on the first groove, the second groove and the ribs to the designed size; finally, multiple support columns are removed, and deburring and cleaning are carried out in turn. Therefore, compared with the prior art, the present invention, on the one hand, uses the two end faces of the blank as the reference to gradually implement roughing, and combines it with two stress relief treatments, which greatly reduces the probability of product deformation during processing and can accurately control the subsequent processing dimensions and form and position tolerances; on the other hand, by setting equal-height support columns during rough processing, precise positioning is provided for subsequent fine processing, effectively reducing the processing difficulty, and at the same time, the support columns are used to support the ribs to ensure that the ribs have sufficient rigidity to meet surface processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the three-dimensional structure of the ion membrane skeleton of the present invention (first viewing angle);

[0032] Figure 2 Schematic diagram of the three-dimensional structure of the ion membrane skeleton of the present invention (second viewing angle);

[0033] Figure 3 for Figure 1 The main view of the 1# workpiece in the middle is a semi-finished product;

[0034] Among them: 1, 1# workpiece; m1, first end face; m2, second end face; c1, first groove; c2, second groove; k, center hole; j, rib; z, support column; 2, 2# workpiece; 3, 3# workpiece. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0036] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] In the present application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0040] like Figure 1 and Figure 2 As shown, the ion membrane skeleton involved in this embodiment is mainly assembled by 1# workpiece 1, 2# workpiece 2 and 3# workpiece 3. Therefore, the processing method for the ion membrane skeleton involved in this embodiment includes the following steps:

[0041] S1, Roughing

[0042] a) placing a cylindrical blank in a heating furnace for heating and heat preservation to remove stress for the first time; then taking out the blank, defining the two end faces of the blank as the first end face m1 and the second end face m2, wherein the second end face m2 of the blank is used as a positioning reference, processing the outer circle and height dimensions of the blank; processing inwardly from the first end face m1 to form a plurality of first grooves c1 with gradually decreasing diameters, and processing the center of the bottom of the innermost first groove c1 to form a center hole k penetrating to the first end face m1 of the blank;

[0043] b) placing the blank in a heating furnace for heating and heat preservation to remove stress for a second time; then taking out the blank, taking the first end face m1 of the blank as the positioning reference, processing inwardly from the second end face m2 of the blank to form a second groove c2, and continuing inwardly at the bottom of the second groove c2 to form ribs j distributed around the center hole k, wherein the hollow portion between adjacent ribs j is connected with the first groove c1; then processing to form an inclined surface on the second end face m2 of the blank; finally, inserting a plurality of support columns z extending along the center line direction of the blank into the hollow portion between adjacent ribs j, keeping the end of each support column z protruding from the second end face m2 of the blank and flush, and at the same time each support column z abuts against and supports the side wall of the rib j, completing the roughing and forming a semi-finished product (such as Figure 3shown);

[0044] S2. Finishing

[0045] c) According to the requirements of the drawings, all outer circle dimensions and heights of the semi-finished products are processed to the designed dimensions;

[0046] d) Based on the outer circle and height dimensions of the semi-finished product processed in step c), according to the requirements of the drawing, the first groove c1, the second groove c2, the center hole k, the rib j, and the inclined surface inside the semi-finished product are processed to the designed dimensions; then, based on the first end surface m1 of the semi-finished product and the plane where the ends of the plurality of support columns z are located as the positioning references, the threaded holes and the inclined holes in the circumferential direction are processed on the first groove c1, the second groove c2, and the rib j to the designed dimensions; at the same time, assembly grooves are processed on both sides of one end surface of the rib j;

[0047] e) removing a plurality of support pillars z, and sequentially performing deburring and cleaning processes to obtain workpiece #1.

[0048] S3, processing workpiece 2# and workpiece 3#

[0049] According to the requirements of the drawings, workpiece 2# and workpiece 3# are processed to the designed dimensions respectively to obtain sector-shaped inner rings corresponding to the assembly grooves on both sides of the rib j;

[0050] S4. Assembly

[0051] Insert and press the 2# workpiece and the 3# workpiece into the corresponding assembly grooves to obtain the finished ion membrane skeleton.

[0052] In some specific embodiments, in step S1, during the first stress removal and the second stress removal, the temperature in the heating furnace is raised in stages, and the temperature is kept at each stage for a certain period of time; the highest temperature in the heating furnace is set to be 10-20°C lower than the melting temperature of the blank material; the temperature is raised by 10-20°C each time, and the holding time of each stage is 1-2 hours. Here, the temperature in the heating furnace is heated to 10-20°C lower than the melting temperature of the blank material by multi-stage high-temperature slow-changing baking, and the stress removal effect is best.

[0053] At the same time, in step S1, the machining allowances of the outer circle, height, each first groove, second groove and center hole on the blank are controlled within 4mm; in step b), the machining allowance of the ribs is controlled within 2mm, and the machining allowance of the inclined surface is controlled within 1mm; in step b), the inclination angle of the inclined surface is 2° to 5°; in step b), the multiple support columns z are divided into multiple layers from the inside to the outside, wherein the multiple support columns z of each layer are spaced around the center line direction of the blank. Here, the support effect formed by the multiple support columns is good, and when the plane where the end is located is used as the positioning reference, the accuracy is high, which is conducive to improving the processing accuracy and improving the product yield.

[0054] In addition, the materials of the 1# workpiece, 2# workpiece, and 3# workpiece are all polypropylene.

[0055] In summary, after adopting this processing method, during roughing, the cylindrical blank is first placed in a heating furnace for heating and insulation to remove stress for the first time. After taking out the blank, the outer circle and height of the blank are processed in turn with one end face as the positioning reference, and the first groove and center hole are formed by processing; then the blank is placed in a heating furnace for heating and insulation to remove stress for a second time, and the blank is taken out and the second groove, ribs and inclined surface are formed with the other end face as the positioning reference, and multiple support columns are inserted into the ribs as the reference for subsequent processing; then, according to the requirements of the drawings, the outer circle, height, first groove, second groove, center hole, ribs and inclined surface on the semi-finished product are gradually adjusted to the designed dimensions, and then one end face of the semi-finished product and the plane where the ends of multiple support columns are located are used as the positioning reference, and the threaded holes and inclined holes in the circumferential direction are processed on the first groove, the second groove and the ribs to the designed dimensions; finally, multiple support columns are removed, and deburring and cleaning are performed in turn. Therefore, compared with the prior art, the present invention, on the one hand, uses the two end faces of the blank as the reference to gradually implement roughing, and combines it with two stress relief treatments, thereby greatly reducing the probability of product deformation during processing, and can accurately control the subsequent processing dimensions and form and position tolerances; on the other hand, by setting equal-height support columns in rough processing, it provides precise positioning for subsequent fine processing, effectively reducing the processing difficulty, and at the same time, the support columns support the ribs to ensure that the ribs have sufficient rigidity to meet surface processing; thirdly, through a multi-stage high-temperature slowly changing baking method, the temperature in the heating furnace is heated to 10 to 20°C lower than the melting point of the blank material, and the stress removal effect is best; fourthly, the support effect formed by the internal and external layered distribution of multiple support columns is good, and when the plane where the end is located is used as the positioning reference, the accuracy is high, which is beneficial to improving the processing accuracy and improving the product yield.

[0056] The above detailed description of the present invention is intended to enable persons familiar with the art to understand the contents of the present invention and implement them. It does not limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A processing method for an ion membrane skeleton, characterized in that: The processing method comprises the following steps: S1, Roughing a) placing a cylindrical blank in a heating furnace for heating and heat preservation to remove stress for the first time; then taking out the blank, defining the two end faces of the blank as the first end face and the second end face respectively, wherein the second end face of the blank is used as a positioning reference, and processing the outer circle and height dimensions of the blank; processing inwardly from the first end face to form a plurality of first grooves with gradually decreasing diameters, and processing the center of the bottom of the innermost first groove to form a center hole penetrating to the first end face of the blank; b) placing the blank in a heating furnace for heating and heat preservation to remove stress for a second time; then taking out the blank, taking the first end face of the blank as a positioning reference, processing inwardly from the second end face of the blank to form ribs distributed around the center hole, wherein the hollow portion between adjacent ribs is connected with the first groove; then processing to form an inclined surface on the second end face of the blank; finally inserting a plurality of support columns extending along the center line direction of the blank into the hollow portion between adjacent ribs, keeping the end of each support column protruding from the second end face of the blank and flush, and at the same time each support column abuts against and supports the side wall of the rib, completing the roughing and forming a semi-finished product; S2. Finishing c) According to the requirements of the drawings, all outer circle dimensions and heights of the semi-finished products are processed to the designed dimensions; d) Based on the outer circle and height dimensions of the semi-finished product processed in step c), according to the requirements of the drawing, the first groove, center hole, ribs, and inclined surface inside the semi-finished product are processed to the designed dimensions; then, based on the first end surface of the semi-finished product and the plane where the ends of the multiple support columns are located as the positioning references, the threaded holes and inclined holes in the circumferential direction are processed on the first groove and ribs to the designed dimensions respectively; e) removing a plurality of support pillars, and performing deburring and cleaning processes in sequence.

2. The processing method for an ion membrane skeleton according to claim 1, characterized in that: In step S1, during the first stress removal and the second stress removal, the temperature in the heating furnace is raised step by step, and the temperature is kept at each stage for a certain period of time.

3. The processing method for an ion membrane skeleton according to claim 2, characterized in that: The maximum temperature in the heating furnace is set to be 10-20°C lower than the melting temperature of the blank material.

4. The processing method for an ion membrane skeleton according to claim 2 or 3, characterized in that: The temperature is raised by 10 to 20°C each time, and the insulation time of each stage is 1 to 2 hours.

5. The processing method for an ion membrane skeleton according to claim 1, characterized in that: In step S1, the machining allowances of the outer circle, height, first grooves, second grooves and center hole on the blank are controlled within 4 mm.

6. The processing method for an ion membrane skeleton according to claim 1, characterized in that: In step b), the machining allowance of the rib is controlled within 2 mm, and the machining allowance of the inclined surface is controlled within 1 mm.

7. The processing method for an ion membrane skeleton according to claim 1 or 6, characterized in that: In step b), the inclination angle of the inclined surface is 2° to 5°.

8. The processing method for an ion membrane skeleton according to claim 1, characterized in that: In step b), the plurality of support columns are divided into multiple layers from the inside to the outside, wherein the plurality of support columns in each layer are spaced apart and distributed around the center line direction of the blank; and / or, in step b), before processing the ribs, the first end face of the blank is first used as a positioning reference, a second groove is formed inwardly from the second end face of the blank, and the bottom of the second groove is further processed inwardly to form the ribs.

9. The processing method for an ion membrane skeleton according to claim 1, characterized in that: After the blank is processed in step S1 and step S2, workpiece 1# is obtained. In step d), assembly grooves need to be processed on both sides of one end surface of the rib respectively. The processing method further includes the following steps: S3, processing workpiece 2# and workpiece 3# According to the requirements of the drawings, workpiece 2# and workpiece 3# are processed to the designed dimensions respectively to obtain sector-shaped inner rings corresponding to the assembly grooves on both sides of the ribs; S4. Assembly Insert and press the 2# workpiece and the 3# workpiece into the corresponding assembly grooves to obtain the finished ion membrane skeleton.

10. The processing method for an ion membrane skeleton according to claim 9, characterized in that: The materials of the 1# workpiece, the 2# workpiece and the 3# workpiece are all polypropylene.

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