Machining process of bearing seat shell

Abstract

The machining technology comprises the following steps that S1, a first datum plane is milled, specifically, the bearing seat shell is fixed to a machine tool through a first clamp, the first datum plane faces upwards, the machining allowance is 0.5 mm, the machining feed is larger than or equal to 0.2 mm / r, and the machining rotating speed is larger than or equal to 7000 r / min; s2, the first datum hole and the stepped hole are sequentially subjected to rough reaming and finish reaming, and the machining allowance of the first datum hole and the stepped hole is 0.4 mm on the single side; s3, reaming a second reference hole; the second reference hole is roughly reamed firstly, then a chamfer is scraped at the upper end of the inner wall of the second reference hole, then the second reference hole is finely reamed, and the machining allowance of the second reference hole is 0.4 mm on a single side; s4, milling the bottom surface of the bearing seat shell; s5, milling a peripheral contour surface and a second reference surface; s6, after the first sinking table is milled, the bearing seat shell is taken down from the first clamp; s7, after the bearing seat shell is fixed through a second clamp, three process tables are milled; and S8, cleaning and checking after laser code engraving. The position degree required by a product can be met, the stable product quality is ensured, and the requirement of batch production is met.

Description

Technical Field

[0001] The invention belongs to the field of bearing seat shell processing, and specifically relates to a processing technology for a bearing seat shell. Background Art

[0002] At present, the precision requirements for bearing housings are very strict. The position accuracy between the associated datums is required to reach φ0.02 and φ0.03, and the contour accuracy is required to reach 0.05. The shape of the bearing housing is compact, and during the processing, the fixture lacks a proper clamping table. The edge contours of the bearing housing product are more, burrs are easily generated, and the product quality is unstable.

[0003] Therefore, a new technology is needed to solve the problem of unstable product quality of the bearing seat housing in the prior art. Summary of the invention

[0004] In order to solve the above problems in the prior art, the present invention provides a processing technology for a bearing seat housing, which solves the problem of high position requirements, meets the position requirements of the product, ensures the stability of product quality, and can meet the needs of mass production.

[0005] The present invention adopts the following technical solutions:

[0006] A processing technology for a bearing seat shell, wherein a groove with an opening upward is provided on the bearing seat shell, a boss is convexly provided at the bottom of the groove, the center hole of the boss is a first reference hole, a ring plate with an outer circumference approximately quadrilateral is convexly provided horizontally outward at the notch of the groove, the upper end surface of the ring plate forms a first reference surface, and the lower end surface forms a second reference surface, three process tables with even intervals are convexly provided horizontally on the outer circumference of the ring plate, and positioning holes are provided on both process tables; a third reference surface is formed on the bottom surface of the bearing seat shell, a blind hole with an opening upward is vertically provided on the ring plate, and the blind hole is a second reference hole, the vertical outer side surface on the bearing seat shell is a peripheral contour surface and the horizontal cross-section is in the shape of a water drop, the tip of the water drop-shaped structure is provided with a first convex portion, and the second reference hole is located on the first convex portion;

[0007] The processing technology of the bearing seat housing comprises the following steps:

[0008] S1. Milling the first reference surface: Use the first fixture to fix the bearing housing on the machine tool, set the first reference surface upward, the machining allowance of the first reference surface is 0.5mm, the machining feed is ≥0.2mm / r, and the machining speed is ≥7000r / min;

[0009] S2. Rough and fine drilling and reaming the first reference hole and the stepped hole; firstly, the first reference hole and the stepped hole are rough-reamed, and then the first reference hole and the stepped hole are fine-reamed, wherein the stepped hole is located inside the first reference hole and is coaxially arranged with the first reference hole, and the machining allowance of the first reference hole and the stepped hole is 0.4 mm per side;

[0010] S3. Ream and fine-drill the second reference hole; first, roughly ream the second reference hole, then chamfer the upper end of the inner wall of the second reference hole, and then fine-ream the second reference hole, wherein the machining allowance of the second reference hole is 0.4 mm on one side;

[0011] S4. Milling the bottom surface of the bearing housing;

[0012] S5. Milling the circumferential contour surface and the second reference surface;

[0013] S6. Milling the first sinker: The first sinker is an R14 sinker. After the first sinker is milled, the bearing housing is removed from the first fixture;

[0014] S7. Milling three process tables: Fix the bearing housing with the second fixture and then mill the three process tables;

[0015] S8. Laser engraving: laser engraving is used on the side of the product;

[0016] S9. Cleaning inspection.

[0017] As a further improvement of the technical solution of the present invention, the first clamp includes three floating supports that are spaced apart and have the same structure, each of the floating supports is provided with a fixing column, and second through holes are provided on the four corners of the ring plate, and each of the fixing columns is respectively inserted into one of the second through holes and is detachably fixedly connected to the bearing seat housing.

[0018] As a further improvement of the technical solution of the present invention, each of the floating supports also includes a pressure block, one end of each of the pressure blocks is rotatably fixed on the operating table, and the other end is fixedly connected to a fixed column, one end of each of the fixed columns is rotatably fixedly connected to a corresponding machine tool, and when the pressure block is flipped upward or downward, the fixed column is lifted upward or inserted downward into the second through hole.

[0019] As a further improvement of the technical solution of the present invention, each of the floating supports further includes a mounting seat, and the upper and lower ends of each of the mounting seats are respectively connected to the corresponding pressing block and the operating platform.

[0020] As a further improvement of the technical solution of the present invention, the first clamp also includes a first limit block, and a first notch is provided on a side of the first limit block close to the bearing seat housing, and the first notch matches and docks with the outer side surface of the first protrusion.

[0021] As a further improvement of the technical solution of the present invention, the first fixture also includes a second limit block, the three process tables are respectively the first process table, the second process table and the third process table, the first process table and the second process table are respectively located on both sides of the first protrusion, the first process table and the second process table are both provided with a first through hole, each of the first through holes forms the positioning hole, and an L-shaped second notch is formed at the connection node between the third process table and the ring plate, and the side of the second limit block close to the bearing seat housing matches and docks with the second notch.

[0022] As a further improvement of the technical solution of the present invention, the second clamp includes a base and four positioning columns installed on the base, the upper end of each positioning column is in the shape of a stepped shaft and has a stepped surface, the upper end of each positioning column can be inserted into each of the second through holes and detachably fixedly connected to the ring plate, and each of the step surfaces abuts against the bottom surface of the ring plate.

[0023] As a further improvement of the technical solution of the present invention, the second clamp also includes a middle support installed on the base, and the upper end of the middle support is inserted into the groove and abuts against the bottom of the groove.

[0024] As a further improvement of the technical solution of the present invention, in step S9, ultrasonic cleaning equipment is used for cleaning.

[0025] As a further improvement of the technical solution of the present invention, in step S9, manual inspection is performed after cleaning to check for defects in product appearance.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] During the processing, the processing sequence of this scheme is adopted. According to the machining of different parts, the bearing seat shell is fixedly supported by the first clamp and the second clamp respectively. The parts have good rigidity when machining the first reference surface, the first reference hole and the second reference hole. In addition, during the machining, the bearing seat shell is not prone to vibration or displacement, which improves the machining accuracy of the bearing seat shell and meets the requirements of the position of various structural parts on the bearing seat shell product. The problem of difficult machining due to high position requirements is solved, so that the stability of product quality is guaranteed and the needs of mass production are met. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The technology of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0029] Figure 1 is a schematic diagram of the connection structure between the bearing seat housing and the first clamp when the first reference surface on the bearing seat housing faces downward;

[0030] Figure 2 is a schematic structural diagram of a first clamp;

[0031] Figure 3 It is a schematic diagram of the structure when the first reference surface on the bearing housing faces upward;

[0032] Figure 4 It is a schematic diagram of the structure when the first reference surface on the bearing housing faces downward;

[0033] Figure 5 It is a schematic diagram of the connection structure between the bearing seat housing and the second clamp when the first reference surface is facing downward.

[0034] Reference numerals:

[0035] 1-bearing seat housing; 11-groove; 12-boss; 121-first reference hole; 13-ring plate; 131-second through hole; 132-first reference surface; 133-second reference surface; 134-second reference hole; 14-first process table; 141-first through hole; 15-second process table; 16-third process table; 17-convex portion; 18-second notch; 19-first sinking platform; 110-second sinking platform;

[0036] 2-first clamp; 21-floating support; 211-mounting seat; 212-pressing block; 213-fixing column; 22-first limiting block; 221-first notch; 23-second limiting block;

[0037] 3-second fixture; 31-base; 32-positioning column;

[0038] 4-machine tool; 41-operating platform. DETAILED DESCRIPTION

[0039] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention, so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other without conflict. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0040] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature, or it may be indirectly fixed or connected to the other feature. In addition, the descriptions of up, down, left, right, etc. used in the present invention are only relative to the relative positional relationship of the components of the present invention in the drawings.

[0041] Reference Figures 1 to 5A processing technology for a bearing seat housing, wherein a groove 11 with an opening upward is provided on the bearing seat housing 1, a boss 12 is convexly provided at the bottom of the groove 11, and the center hole of the boss 12 is a first reference hole 121. A ring plate 13 with an outer periphery approximately in a quadrilateral is convexly provided horizontally outwardly at the notch of the groove 11, a first reference surface 132 is formed on the upper end surface of the ring plate 13, and a second reference surface 133 is formed on the lower end surface. Three process tables with uniform intervals are convexly provided horizontally on the outer periphery of the ring plate 13, and two of the process tables are provided with positioning holes; a third reference surface is formed on the bottom surface of the bearing seat housing 1, a blind hole with an opening upward is vertically provided on the ring plate 13, and the blind hole is a second reference hole 134. The vertical outer side surface on the bearing seat housing 1 is a peripheral contour surface and the horizontal cross section is in the shape of a water drop, and a first convex portion 17 is provided at the tip of the water drop-shaped structure, and the second reference hole 134 is located on the first convex portion 17. Among them, the first reference surface 132 is located on one side of the back side of the bearing seat housing 1.

[0042] The processing technology of the bearing seat housing 1 includes the following steps:

[0043] S1. Milling the first reference surface 132: Use the first fixture 2 to fix the bearing seat shell 1 on the machine tool 4, with the first reference surface 132 set upward, and use a machining center for machining. The tool material during machining is diamond material, the machining allowance of the first reference surface 132 is 0.5mm, the machining feed is ≥0.2mm / r, the machining speed is ≥7000r / min, and the machining speed is preferably 8000r / min; the first fixture 2 uses a rotating method to move the floating support 21 of the bearing seat shell 1. When machining the first reference surface 132, the first reference hole 121, and the second reference hole 134, the parts have good rigidity, and during the machining process, the bearing seat shell 1 is not easy to vibrate or shift, which improves the machining accuracy of the bearing seat shell 1, meets the position requirements of various structural parts on the bearing seat shell 1 product, solves the problem of high position requirements and difficult machining, ensures product quality stability, and meets the needs of mass production.

[0044] The first fixture 2 includes three floating supports 21 that are spaced apart and have the same structure. Each of the floating supports 21 is provided with a fixed column 213. The four corners of the ring plate 13 are provided with a second through hole 131. Each of the fixed columns 213 is inserted into one of the second through holes 131 and is detachably fixedly connected to the bearing seat housing 1. Each of the floating supports 21 also includes a pressing block 212. One end of each of the pressing blocks 212 is rotatably fixed on the operating table, and the other end is fixedly connected to a fixed column 213. One end of each of the fixed columns 213 is rotatably fixedly connected to a corresponding machine tool 4. When the pressing block 212 is flipped upward or downward, the fixed column 213 is lifted upward or inserted downward into the second through hole 131. Each of the floating supports 21 also includes a mounting seat 211. The upper and lower ends of each of the mounting seats 211 are respectively connected to the corresponding pressing block 212 and the operating platform 41.

[0045] The first fixture 2 further includes a first stopper 22 and a second stopper 23. The first stopper 22 is provided with a first notch 221 on one side close to the bearing housing 1. The first notch 221 matches and docks with the outer side of the first protrusion 17. The three process tables are the first process table 14, the second process table 15 and the third process table 16. The first process table 14 and the second process table 15 are respectively located on both sides of the first protrusion 17. The first process table 14 and the second process table 15 are both provided with a first through hole 141. Each of the first through holes 141 forms the positioning hole. An L-shaped second notch 18 is formed at the connection node between the third process table 16 and the ring plate 13. The second stopper 23 is provided with a side close to the bearing housing 1 and matches and docks with the second notch 18.

[0046] S2. Rough and fine drilling of the first reference hole 121 and the stepped hole: Use a machining center for machining, firstly perform rough reaming of the first reference hole 121 and the stepped hole, which is equivalent to expanding the first reference hole 121 and the stepped hole, use a diamond tool during machining, the machining feed ≥0.1mm / r, the machining speed ≥5000r / min, the machining speed is preferably 6000r / min, and the machining feed is preferably 0.1mm / r. Then perform fine reaming of the first reference hole 121 and the stepped hole, wherein the stepped hole is located in the first reference hole 121 and is coaxially arranged with the first reference hole 121, and the machining allowance of the first reference hole 121 and the stepped hole is 0.4mm on one side, use a diamond tool during machining, the machining feed ≥0.05mm / r, the machining speed ≥4000r / min, the machining feed is preferably 0.05mm / r, and the machining speed is preferably 5000r / min. The first reference hole 121 and the stepped hole have a diameter of φ14.9.

[0047] S3. Ream and fine drill the second reference hole 134; use a machining center to perform machining, first perform rough reaming of the second reference hole 134, which is equivalent to expanding the second reference hole 134, use a diamond tool during machining, the machining feed ≥ 0.1mm / r, the machining speed ≥ 4000r / min, the machining speed is preferably 5000r / min, and the machining feed is preferably 0.1mm / r. Then scrape and chamfer the upper end of the inner wall of the second reference hole 134, and then perform fine reaming of the second reference hole 134, wherein the machining allowance of the second reference hole 134 is 0.4mm on one side, use a diamond tool during machining, the machining feed ≥ 0.1mm / r, the machining speed ≥ 4000r / min, the machining speed is preferably 5000r / min, and the machining feed is preferably 0.1mm / r.

[0048] S4. When milling the bottom surface of the bearing seat housing 1, a machining center is used for machining. A diamond tool is used for machining. The machining feed is ≥0.25mm / r, the machining speed is ≥7000r / min, the machining speed is preferably 8000r / min, and the machining feed is preferably 0.25mm / r.

[0049] S5. When milling the circumferential contour surface and the second reference surface 133, a machining center is used for machining, a diamond tool is used for machining, a machining feed ≥ 0.2 mm / r, a machining speed ≥ 7000 r / min, a machining speed preferably 8000 r / min, and a machining feed preferably 0.2 mm / r. The circumferential contour surface and the second reference surface 133 are located on one side of the front surface of the bearing housing 1.

[0050] S6. Milling the first sinker 19: Use a machining center to machine the first sinker 19, the first sinker 19 is an R14 sinker, and a diamond tool is used when milling the first sinker 19, the machining feed ≥ 0.3mm / r, the machining speed ≥ 7000r / min, the machining speed is preferably 7500r / min, and the machining feed is preferably 0.3mm / r. After milling the first sinker 19, brush the burrs on the back of the bearing seat housing 1, and then remove the bearing seat housing 1 from the first fixture 2. Among them, when brushing the burrs on the back, a ceramic fiber tool is used, the machining feed ≥ 0.9mm / r, the machining speed ≥ 2500r / min, the machining speed is preferably 3000r / min, and the machining feed is preferably 0.9mm / r.

[0051] S7. Milling three process tables: After the bearing seat housing 1 is fixed by the second fixture 3, three process tables are milled on the bearing seat housing 1 by a machining center. When milling the process tables, a carbide tool is used, and the processing feed ≥ 0.15mm / r, the processing speed ≥ 4000r / min, the processing speed is preferably 5000r / min, and the processing feed is preferably 0.15mm / r. The second fixture 3 includes a base 31 and four positioning columns 32 installed on the base 31, and a middle support. The upper end of each positioning column 32 is in the shape of a stepped shaft and has a stepped surface. The upper end of each positioning column 32 can be inserted into each second through hole 131 and detachably fixedly connected to the ring plate 13, and each step surface abuts against the bottom surface of the ring plate 13. The upper end of the middle support is inserted into the groove 11 and abuts against the groove bottom of the groove 11.

[0052] S8. Laser engraving: Laser engraving is used on the side of the product to facilitate product traceability.

[0053] S9. Cleaning and inspection: Use ultrasonic cleaning equipment for cleaning, and conduct manual inspection after cleaning to check for product appearance defects, such as bruises, meat loss, residue accumulation, excessive porosity, excessive burrs, etc.

[0054] During the processing, the processing sequence of the present scheme is adopted, and the bearing seat shell 1 is fixedly supported by the first clamp 2 and the second clamp 3 according to the machining of different parts. When the first reference surface 132, the first reference hole 121, and the second reference hole 134 are processed, the parts have good rigidity, and during the processing, the bearing seat shell 1 is not easy to vibrate or shift, which improves the processing accuracy of the bearing seat shell 1, meets the position requirements of various structural parts on the bearing seat shell 1 product, solves the problem of high position requirements and difficult processing, ensures the stability of product quality, and meets the needs of mass production.

[0055] For other details of the processing technology of the bearing seat housing described in the present invention, please refer to the prior art and will not be described in detail here.

[0056] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Therefore, any modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A processing technology for a bearing housing, characterized in that: The bearing seat shell is provided with a groove opening upward, a boss is convexly provided at the bottom of the groove, the center hole of the boss is the first reference hole, a ring plate with an outer circumference approximately quadrilateral is convexly provided horizontally outward at the notch of the groove, the upper end surface of the ring plate forms the first reference surface, and the lower end surface forms the second reference surface, three evenly spaced process tables are convexly provided horizontally on the outer circumference of the ring plate, and positioning holes are provided on both process tables; the bottom surface of the bearing seat shell forms the third reference surface, and a blind hole opening upward is vertically provided on the ring plate, and the blind hole is the second reference hole, the vertical outer side surface on the bearing seat shell is a peripheral contour surface and the horizontal cross-section is in the shape of a water drop, the tip of the water drop-shaped structure is provided with a first convex portion, and the second reference hole is located on the first convex portion; The processing technology of the bearing seat housing comprises the following steps: S1. Milling the first reference surface: Use the first fixture to fix the bearing housing on the machine tool, set the first reference surface upward, the machining allowance of the first reference surface is 0.5mm, the machining feed is ≥0.2mm / r, and the machining speed is ≥7000r / min; S2. Rough and fine drilling and reaming the first reference hole and the stepped hole; firstly, the first reference hole and the stepped hole are rough-reamed, and then the first reference hole and the stepped hole are fine-reamed, wherein the stepped hole is located inside the first reference hole and is coaxially arranged with the first reference hole, and the machining allowance of the first reference hole and the stepped hole is 0.4 mm per side; S3. Ream and fine-drill the second reference hole; first, roughly ream the second reference hole, then chamfer the upper end of the inner wall of the second reference hole, and then fine-ream the second reference hole, wherein the machining allowance of the second reference hole is 0.4 mm on one side; S4. Milling the bottom surface of the bearing housing; S5. Milling the circumferential contour surface and the second reference surface; S6. Milling the first sinker: The first sinker is an R14 sinker. After the first sinker is milled, the bearing housing is removed from the first fixture; S7. Milling three process tables: Fix the bearing housing with the second fixture and then mill the three process tables; S8. Laser engraving: laser engraving is used on the side of the product; S9. Cleaning inspection.

2. The processing technology of the bearing seat housing according to claim 1 is characterized in that: The first clamp includes three floating supports that are spaced apart and have the same structure, each of the floating supports is provided with a fixing column, and second through holes are provided on the four corners of the ring plate, and each of the fixing columns is respectively inserted into one of the second through holes and is detachably fixedly connected to the bearing seat housing.

3. The processing technology of the bearing seat housing according to claim 2 is characterized in that: Each of the floating supports also includes a pressure block, one end of each of the pressure blocks is rotatably fixed on the operating table, and the other end is fixedly connected to a fixed column. One end of each of the fixed columns is rotatably fixedly connected to a corresponding machine tool. When the pressure block is flipped upward or downward, the fixed column is lifted upward or inserted downward into the second through hole.

4. The processing technology of the bearing seat housing according to claim 3 is characterized in that: Each of the floating supports further comprises a mounting seat, and upper and lower ends of each of the mounting seats are respectively connected to the corresponding pressing block and the operating platform.

5. The processing technology of the bearing seat housing according to claim 2 is characterized in that: The first clamp further comprises a first limiting block, a first notch is provided on a side of the first limiting block close to the bearing seat housing, and the first notch is matched and docked with an outer side surface of the first protrusion.

6. The processing technology of the bearing seat housing according to claim 2 is characterized in that: The first fixture also includes a second limit block, and the three process tables are respectively the first process table, the second process table and the third process table. The first process table and the second process table are respectively located on both sides of the first protrusion. The first process table and the second process table are both provided with first through holes, and each of the first through holes forms the positioning hole. An L-shaped second notch is formed at the connection node between the third process table and the ring plate, and the side of the second limit block close to the bearing seat housing matches and docks with the second notch.

7. The processing technology of the bearing seat housing according to claim 2 is characterized in that: The second clamp includes a base and four positioning columns installed on the base, the upper end of each positioning column is in the shape of a stepped shaft and has a stepped surface, the upper end of each positioning column can be inserted into each of the second through holes and detachably fixedly connected to the ring plate, and each of the step surfaces abuts against the bottom surface of the ring plate.

8. The processing technology of the bearing seat housing according to claim 7 is characterized in that: The second clamp further includes a middle support mounted on the base, wherein the upper end of the middle support is inserted into the groove and abuts against the bottom of the groove.

9. The processing technology of the bearing seat housing according to claim 1, characterized in that: In step S9, ultrasonic cleaning equipment is used for cleaning.

10. The processing technology of the bearing seat housing according to claim 1, characterized in that: In step S9, after cleaning, manual inspection is performed to check for defects in product appearance.

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