High-precision inner spherical surface coloring gauge and processing method thereof

Abstract

The invention discloses a high-precision inner spherical surface coloring gauge and a processing method thereof.The gauge comprises a gauge body and a stepped through hole, the gauge body is a cylinder, two cubes are arranged on the cylindrical surface of the cylinder, and the center connecting line of the two cubes perpendicularly intersects with the axis of the cylinder; the step through hole is coaxial with the cylinder corresponding to the gauge main body and penetrates through two axial end faces of the cylinder, two spherical surfaces are arranged on the hole wall of an inner hole with the smallest aperture in the step through hole, and the sphere centers of the two spherical surfaces are located on the axis of the cylinder corresponding to the gauge main body and are symmetrical about the center connecting line of the two cubes. When the gauge is processed, the gauge main body is divided into an upper half part and a lower half part from the center of the inner spherical surface of the gauge main body, the spherical surface is ground by a numerical control internal grinding machine, and then the technical requirements are ensured by a method of lathing and grinding the spherical surface by using a formed grinding rod. The technical bottleneck problem that a spherical grinding rod cannot enter the inner spherical surface of the gauge for grinding machining is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a high-precision inner spherical surface coloring gauge and a processing method thereof. Background Art

[0002] In mechanical processing, the processing of the inner spherical surface coloring gauge has always been relatively complicated. Due to the high technical requirements, it is usually required that the inner spherical surface and the standard part have a coloring area of ​​97% after coloring. To ensure this technical requirement, it is necessary to use a molded grinding rod with a size close to the inner spherical surface and a grinding paste to manually grind it in all directions after grinding. Figure 1 and Figure 2 Due to the structural limitations of the gauge itself, the molded grinding rod cannot enter the spherical cavity for grinding. Summary of the invention

[0003] In view of the problems described in the background technology, the present invention aims to provide a high-precision inner spherical surface colored gauge and a processing method thereof, so as to solve the problem that the high-precision inner spherical surface colored gauge cannot be processed and provide a feasible processing idea for this type of gauge.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A high-precision inner sphere shading gauge, comprising:

[0006] A gauge body, wherein the gauge body is a cylinder, and two cubes are arranged on the cylindrical surface of the cylinder, and the center line of the two cubes intersects the axis of the cylinder perpendicularly;

[0007] A stepped through hole is coaxial with the cylinder corresponding to the gauge body and passes through the two axial end faces of the cylinder. There are two spherical surfaces on the wall of the inner hole with the smallest aperture in the stepped through hole. The centers of the two spherical surfaces are located on the axis of the cylinder corresponding to the gauge body and are symmetrical about the center line of the two cubes.

[0008] The processing method of the high-precision inner spherical surface coloring gauge comprises:

[0009] A gauge body, two cubes and a stepped through hole are processed, and the gauge body is split into an upper half and a lower half using a plane defined by a center line connecting the two cubes on the gauge body and the axis of a cylinder corresponding to the gauge body as a splitting plane. The upper half and the lower half are then spliced ​​together using the aforementioned splitting plane, and the upper half and the lower half are fastened together as a whole using a connector. Two spherical surfaces are obtained in the stepped through hole by grinding, the connector is removed, the upper half and the lower half are separated to obtain a space sufficient to accommodate a spherical grinding rod, and the spherical grinding rod is then placed at the locations of the two spherical surfaces, and the upper half and the lower half are again fastened together as a whole using a connector, and the spherical grinding rod is driven to grind the two spherical surfaces.

[0010] Furthermore, the processing method of the high-precision inner spherical surface coloring gauge comprises the following steps:

[0011] S1, obtaining a cylinder by turning, and turning two axial end faces of the cylinder and a stepped through hole on the axial end faces;

[0012] S2, using the center of the stepped through hole as a reference, a cylinder and two cubes corresponding to the gauge body are obtained by wire cutting on the cylinder, and then the gauge body is cut into two parts, an upper half and a lower half, along the splitting surface;

[0013] S3, using bench processing to process a stepped hole at each position corresponding to the two cubes in the upper half, and a threaded hole at each position corresponding to the two cubes in the lower half, and drill two threading holes on the cylindrical surfaces of the upper half and the lower half respectively. The axes of the two threading holes are perpendicular to the split surface and pass through the upper half and the lower half. The distances from the four threading holes on the upper half and the lower half to the center of the stepped through hole are equal;

[0014] S4, machining datum, using a surface grinder to grind the split surfaces of the upper and lower halves, the two side end surfaces of the two cubes perpendicular to the center line of the two cubes, and the two axial end surfaces of the cylinder, respectively, to ensure that the length and width dimensions of the split surface of the upper half are consistent with those of the split surface of the lower half, and then to grind the above-mentioned grinding surfaces of the upper and lower halves respectively by bench grinding, to ensure that the length and width dimensions of the split surface of the upper half are consistent with those of the split surface of the lower half and to obtain higher precision, so as to serve as the datum for subsequent grinding of the spherical surface;

[0015] S5, align and splice the upper half and the lower half with the split surface as the reference, then use screws to pass through the stepped holes and threaded holes processed in S3 and use nuts to connect the upper half and the lower half as a whole, then use slow wire cutting to cut two cylindrical pin holes at the positions of the wire holes in S3 in the upper half and the lower half, the axes of the two cylindrical pin holes are perpendicular to the split surface and pass through the upper half and the lower half, and finally insert the cylindrical pins into the cylindrical pin holes;

[0016] S6, using a forming grinding wheel to extend into the stepped through hole after the upper half and the lower half are spliced, and grinding two spherical surfaces on the hole wall of the stepped through hole by grinding;

[0017] S7, loosen the screws and nuts, knock out the cylindrical pin, and separate the upper half and the lower half along the split surface by a distance that allows the spherical grinding rod to be placed in two spherical positions in the stepped through hole;

[0018] S8, align the upper half and the lower half again by the split surface, then tighten the screws and nuts to close the upper half and the lower half and install the cylindrical pin to ensure that the spherical grinding rod can rotate normally. At this time, the two spherical surfaces are ground by rotating the spherical grinding rod;

[0019] S9, separate the upper and lower halves along the split surface for a distance according to the method of S7, take out the spherical grinding rod, and then close the upper and lower halves along the split surface according to the method of S8 and install the cylindrical pin, then use the standard parts to reach into the stepped through hole, detect the colored area of ​​the spherical surface, and store the oil seal after passing the test.

[0020] It should be noted that the standard part in S9 refers to a testing gauge, which is shaped like a spherical grinding rod, with two planes milled on the left and right sides of the spherical surface to facilitate insertion into the stepped through hole for testing.

[0021] Furthermore, in S3, the upper and lower halves after the step holes, threaded holes and threaded holes are processed are heat treated by sequential quenching and tempering.

[0022] Furthermore, in S6, a CNC internal grinding machine is used in conjunction with a forming grinding wheel to grind two spherical surfaces on the hole wall of the stepped through hole.

[0023] Further, in S6, the molding surface of the molding grinding wheel is a partial spherical surface. The molding surface of the molding grinding wheel is processed by a diamond pen program, which is only a part of the spherical surface, not the entire spherical surface, and can extend into the combined stepped hole.

[0024] As an option, the hardness of the upper half and the lower half after the quenching and tempering treatment meets HRC58-62.

[0025] In order to solve the problem that the molded grinding rod cannot be inserted into the spherical surface for grinding, the present invention adopts a method of dividing the gauge body into two parts from the center of the inner spherical surface and then processing them, thereby ultimately ensuring the technical requirements.

[0026] Compared with the prior art, the present invention solves the problem that the molded grinding rod cannot enter the inner cavity of the gauge for grinding, thereby solving the technical bottleneck problem of spherical grinding inside the gauge, providing experience for similar processing, and can be widely promoted and applied in the field of mechanical processing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic cross-sectional view of the gauge;

[0028] Figure 2 It is a three-dimensional schematic diagram of the gauge;

[0029] Figure 3 This is a schematic diagram of the gauge after it is split into the upper and lower halves;

[0030] Figure 4 for Figure 3 sectional view of

[0031] Figure 5 It is a schematic diagram of the state where the spherical grinding rod is placed into the inner ball socket after the upper half and the lower half are separated for a certain distance;

[0032] Figure 6 It is a schematic diagram of the state where the spherical grinding rod is put into the inner ball socket for grinding after the upper half and the lower half are closed;

[0033] In the figure, 1-upper half, 2-lower half, 3-cylindrical pin hole, 4-screw, 5-nut, 6-cylindrical pin, 7-workpiece, 8-spherical grinding rod. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to the common technical knowledge and customary means in the field are included in the scope of the present invention.

[0035] The present invention relates to a high-precision inner spherical surface coloring gauge and a processing method thereof. Figure 1 and Figure 2 As shown in the figure, the structure of the gauge is a piece of monolithic material with an inner spherical socket SΦA (the inner spherical socket SΦA is divided into two spherical surfaces). The monolithic material here includes a cylindrical gauge body. There is a pair of cube structures on the cylindrical surface of the gauge body. The center line of the two cubes passes through the center of the inner spherical socket SΦA. The gauge requires that the inner spherical surface coloring area reach 97%, due to structural limitations (such as Figure 1 The through hole diameter ΦB of the gauge is smaller than the diameter ΦA of the inner ball socket, and the formed spherical grinding head used for grinding cannot directly pass through the hole diameter ΦB to reach the inner ball socket SΦA), so the mature processing method cannot be used.

[0036] In order to ensure that the gauge meets the technical requirements, the invention changed the processing idea, and the gauge body was divided into two parts from the center of the inner sphere for processing. The specific process route is as follows: rough turning (this process is the processing before dividing the gauge body into two parts, the purpose is to obtain a cylinder with a stepped through hole and two axial end faces processed) → wire cutting to obtain two cubes and the cylindrical surface corresponding to the gauge body, and the gauge body is divided into two parts from the center of the inner sphere corresponding to the inner sphere → the bench worker makes stepped holes, threaded holes and threading holes → heat treatment → surface grinding benchmark, bench worker repairs benchmark → use screws 4 and nuts 5 to assemble the two parts into one → cut out the cylindrical pin hole 3 on the two parts through the threading hole → the bench worker installs the cylindrical pin 6 → the CNC internal grinder grinds the inner sphere → the bench worker disassembles the two parts and puts in the spherical grinding rod 8 and then assembles them into one to form a workpiece 7 → turning grinds the inner sphere → detects the colored area → final inspection → the bench worker oil seals and puts it into storage.

[0037] The present invention adopts a method that the gauge body is divided into two parts from the center of the inner spherical surface, a CNC internal cylindrical grinder is used for grinding, and then a lathe operator grinds with the help of a formed grinding rod to ensure technical requirements.

[0038] like Figure 1 and Figure 2 The original structure of the high-precision inner spherical surface coloring gauge is shown. The structure is to process the inner spherical surface SΦA on a whole piece of material, and the coloring area of ​​SΦA and the standard part is required to reach 97%. To ensure this technical condition, it is necessary to use a molded grinding rod with a size close to the inner spherical surface and a grinding paste to grind it manually in all directions after grinding. However, due to the structural limitations of the gauge involved in the present invention, the molded grinding rod (i.e. Figure 5 The spherical grinding rod 8 shown in the figure, whose head grinding surface is a complete spherical surface) cannot enter the spherical inner cavity for grinding. In order to solve this problem, as Figure 3 and Figure 4 The present invention adopts a method of dividing the gauge body into an upper half 1 and a lower half 2 from the center of the inner ball and then processing them, and finally ensures that the technical conditions are met. The specific steps are as follows:

[0039] S1, a cylinder is obtained by turning, the cylinder has a stepped through hole and the two axial end faces are rough-machined;

[0040] S2, using wire cutting to cut the two cubes and the gauge body along the splitting surface to obtain the upper half 1 and the lower half 2;

[0041] S3, such as Figure 4, using bench processing to process step holes and threaded holes at the positions of the upper half 1 and the lower half 2 corresponding to the two cubes, and drilling wire holes on the cylindrical surfaces of the upper half 1 and the lower half 2 (because the hardness reaches HRC58-62 after heat treatment in the subsequent S41, only the slow wire cutting method can be used, so it is necessary to make a hole smaller than the cylindrical pin hole 3 itself in the center of the cylindrical pin hole 3 to facilitate the penetration of the slow wire copper wire for cutting);

[0042] S4, processing benchmark, is divided into:

[0043] S41, heat treatment is performed on the upper half 1 and the lower half 2 after the step hole, threaded hole and threading hole are completed in S3, specifically quenching and tempering, and the hardness is ensured to be HRC58-62 after tempering;

[0044] S42, using a surface grinding reference to obtain a split surface as a reference, the specific grinding objects are the two side surfaces of the maximum width of the upper half 1 cube, the two end surfaces of the axial direction of the cylinder, the split surface and the two side surfaces of the maximum width of the lower half 2 cubes, the two end surfaces of the axial direction of the cylinder and the split surface, after grinding, ensure that the two side surfaces of the maximum width of the upper half 1 cube and the two end surfaces of the axial direction of the cylinder are consistent with the two side surfaces of the maximum width of the lower half 2 cubes and the two end surfaces of the axial direction of the cylinder;

[0045] S43, the benchworker grinds the benchmark to ensure that the dimensions of the two sides of the maximum width of the upper half 1 cube and the two end faces of the cylinder are consistent with the dimensions of the two sides of the maximum width of the lower half 2 cube and the two end faces of the cylinder, and the difference does not exceed 0.002mm. Through grinding, higher accuracy is obtained as the benchmark for grinding the inner sphere and reducing the errors caused by repeated disassembly and assembly in the subsequent processing process;

[0046] S5, connect the upper half 1 and the lower half 2 as a whole through the screws 4 and nuts 5, and use the slow wire cutting method to cut two cylindrical pin holes 3 at the threading holes on the cylindrical surface of the upper half 1 and the lower half 2 corresponding to the gauge body (the cylindrical pin hole 3 of the upper half 1 and the cylindrical pin hole 3 of the lower half 2 are processed together by the slow wire cutting method to obtain a better positioning effect), and install the cylindrical pin 6 to form a Figure 5 Workpiece 7 shown in;

[0047] S6, using a CNC internal grinding machine to grind two spherical surfaces on the wall of the stepped through hole;

[0048] S7, such as Figure 5 , loosen the screw 4 and the nut 5, knock out the cylindrical pin 6, and separate the upper half 1 and the lower half 2 along the split surface by a distance that allows the spherical grinding rod 8 to be placed in two spherical positions in the stepped through hole;

[0049] S8, such as Figure 6, tighten the screw 4 and the nut 5, install the cylindrical pin 6 to close the upper half 1 and the lower half 2 along the split surface, and ensure that the spherical grinding rod 8 can rotate normally. At this time, the two spherical surfaces are ground by rotating the spherical grinding plate;

[0050] S9, repeat the splitting process of S7, take out the spherical grinding rod 8, and tighten the upper half 1 and the lower half 2 according to the tightening method of S8, and detect the colored area of ​​the spherical surface. After the colored area is qualified, the oil seal is stored in the warehouse.

[0051] During the processing, it should be noted that the fitter must ensure that the upper half 1 and the lower half 2 are aligned with each other each time the workpiece 7 is assembled, so as to ensure the effect of the lathe grinding of the spherical surface.

[0052] The present invention divides the gauge body into two parts from the center of the inner spherical surface, and adopts a method in which a CNC internal cylindrical grinder is used for grinding and then a lathe operator uses a formed grinding rod for grinding to ensure technical requirements. This method solves the problem that the grinding rod of the existing structure cannot enter the inner spherical surface cavity for grinding, and has been promoted in actual production.

[0053] The contents not described in detail in the specification of the present invention belong to the prior art known to the professional and technical personnel in the field. Although the illustrative specific embodiments of the present invention are described above to facilitate the understanding of the present invention by the technical personnel in the field, it should be clear that the present invention is not limited to the scope of the specific embodiments. For ordinary technicians in the field of this technology, as long as various changes are within the spirit and scope of the present invention defined and determined by the attached claims, these changes are obvious, and all inventions and creations using the concept of the present invention are protected.

Claims

1. A high-precision inner sphere coloring gauge, characterized in that: include: A gauge body, wherein the gauge body is a cylinder, and two cubes are arranged on the cylindrical surface of the cylinder, and the center line of the two cubes intersects the axis of the cylinder perpendicularly; A stepped through hole is coaxial with the cylinder corresponding to the gauge body and passes through the two axial end faces of the cylinder. There are two spherical surfaces on the wall of the inner hole with the smallest aperture in the stepped through hole. The centers of the two spherical surfaces are located on the axis of the cylinder corresponding to the gauge body and are symmetrical about the center line of the two cubes.

2. The method for processing a high-precision inner sphere colored gauge according to claim 1, characterized in that: include: A gauge body, two cubes and a stepped through hole are processed, and the gauge body is split into an upper half (1) and a lower half (2) using a plane defined by a center line connecting the two cubes on the gauge body and an axis of a cylinder corresponding to the gauge body as a splitting plane. The upper half (1) and the lower half (2) are then spliced ​​together using the splitting plane, and the upper half (1) and the lower half (2) are fastened together as a whole using a connecting piece, two spherical surfaces are obtained in the stepped through hole by grinding, the connecting piece is removed, the upper half (1) and the lower half (2) are separated to obtain a space sufficient to accommodate a spherical grinding rod (8), and the spherical grinding rod (8) is then placed at the locations of the two spherical surfaces, the upper half (1) and the lower half (2) are again fastened together as a whole using the connecting piece, and the spherical grinding rod (8) is driven to grind the two spherical surfaces.

3. The method for processing a high-precision inner sphere colored gauge according to claim 2, characterized in that: The following steps are involved: S1, obtaining a cylinder by turning, and turning two axial end faces of the cylinder and a stepped through hole on the axial end faces; S2, using the center of the stepped through hole as a reference, using a wire cutting method on the cylinder to obtain a cylinder corresponding to the gauge body and two cubes, and then cutting the gauge body into an upper half (1) and a lower half (2) along the splitting surface; S3, using bench processing to process a stepped hole at each position corresponding to the two cubes in the upper half (1), a threaded hole at each position corresponding to the two cubes in the lower half (2), and two threading holes are drilled on the cylindrical surfaces of the upper half (1) and the lower half (2), respectively. The axes of the two threading holes are perpendicular to the splitting surface and pass through the upper half (1) and the lower half (2), and the distances from the four threading holes on the upper half (1) and the lower half (2) to the center of the stepped through hole are equal; S4, machining datum, using a surface grinder to grind the splitting surfaces of the upper half (1) and the lower half (2), the two side end surfaces of the two cubes perpendicular to the center line of the two cubes, and the two axial end surfaces of the cylinder, respectively, to ensure that the length and width dimensions of the splitting surface of the upper half (1) are consistent with those of the splitting surface of the lower half (2), and then the above-mentioned grinding surfaces of the upper half (1) and the lower half (2) are respectively ground by benchwork, to ensure that the length and width dimensions of the splitting surface of the upper half (1) are consistent with those of the splitting surface of the lower half (2) and to obtain higher precision, so as to serve as a datum for subsequent grinding of the spherical surface; S5, align and splice the upper half (1) and the lower half (2) with the split surface as the reference, then use the screw (4) to pass through the stepped hole and threaded hole processed in S3 and cooperate with the nut (5) to connect the upper half (1) and the lower half (2) as a whole, then use the slow wire cutting to cut two cylindrical pin holes (3) in the upper half (1) and the lower half (2) at the positions of the threading holes in S3, the axes of the two cylindrical pin holes (3) are perpendicular to the split surface and pass through the upper half (1) and the lower half (2), and finally insert the cylindrical pin (6) into the cylindrical pin hole (3); S6, using a forming grinding wheel to extend into the stepped through hole formed by splicing the upper half (1) and the lower half (2), and grinding two spherical surfaces on the hole wall of the stepped through hole; S7, loosen the screw (4) and the nut (5), knock out the cylindrical pin (6), and separate the upper half (1) and the lower half (2) along the splitting surface by a distance that allows the spherical grinding rod (8) to be placed in two spherical positions in the stepped through hole; S8, align the upper half (1) and the lower half (2) again by the split surface, then tighten the screw (4) and the nut (5) to close the upper half (1) and the lower half (2) and install the cylindrical pin (6) to ensure that the spherical grinding rod (8) can rotate normally. At this time, the two spherical surfaces are ground by rotating the spherical grinding rod (8); S9, separate the upper half (1) and the lower half (2) along the split surface for a distance according to the method of S7, take out the spherical grinding rod (8), and then close the upper half (1) and the lower half (2) along the split surface according to the method of S8 and install the cylindrical pin (6), then use the standard part to extend into the stepped through hole to detect the colored area of ​​the spherical surface, and store the oil seal in the warehouse after passing the test.

4. The method for processing a high-precision inner sphere colored gauge according to claim 3, characterized in that: In S3, the upper half (1) and the lower half (2) on which the stepped hole, the threaded hole and the threaded hole are processed are subjected to heat treatment, and the heat treatment method is quenching and tempering in sequence.

5. The method for processing a high-precision inner sphere colored gauge according to claim 3 is characterized in that: In S6, a numerically controlled internal grinding machine is used in conjunction with a forming grinding wheel to grind two spherical surfaces on the hole wall of the stepped through hole.

6. The method for processing a high-precision inner sphere colored gauge according to claim 3 is characterized in that: In the above S6, the molding surface of the molding grinding wheel is a partial spherical surface.

7. The method for processing a high-precision inner sphere colored gauge according to claim 4, characterized in that: After the quenching and tempering treatment, the hardness of the upper half (1) and the lower half (2) meets HRC58-62.

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