Precise positioning structure and method for main shaft sleeve

Abstract

The precise positioning structure comprises a shell, a shaft sleeve hole is machined in the shell, a supporting step is machined on the shaft sleeve hole, the main shaft sleeve is supported on the top of the supporting step, an annular cavity is formed between the main shaft sleeve and the shell, and a main shaft is rotationally installed in the center of the main shaft sleeve; a glue injection hole is formed in the shell in the radial direction, and the glue injection hole is communicated with the annular cavity; and high-precision positioning glue is injected into the annular cavity. The whole process is easy to operate, positioning is accurate and stable, the assembling time is saved, the assembling precision is improved, the interchangeability of all parts is improved, the part machining difficulty is reduced, assembling is stable and reliable, and operation is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of precision spindle installation, and in particular to a precision positioning structure and method for a spindle sleeve. Background Art

[0002] The traditional method of fixing a spindle sleeve in a housing is to control the outer circle of the spindle sleeve and the inner hole of the housing to be an interference fit. Its biggest drawback is that: the tolerance zone between the spindle sleeve and the housing is very small, the machining requirements for parts are high, and the machining difficulty for workers is great; when the spindle sleeve needs to be replaced after the parts are interference-fitted, the old spindle sleeve must be damaged before it can be taken out, causing certain waste. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above deficiencies and provide a precision positioning structure and method for a spindle sleeve. There is a large gap between the spindle sleeve and the housing of this structure. Only need to align the spindle accuracy after first installing the spindle into the spindle sleeve, and then inject high-precision positioning glue into the gap between the spindle sleeve and the housing, then the spindle sleeve can be accurately fixed in the housing. The whole process is simple to operate, accurately positioned and stable, not only saving the assembly time, improving the assembly accuracy, but also increasing the interchangeability of each part. This structure reduces the machining difficulty of parts, and the assembly is stable and reliable, and the operation is convenient.

[0004] In order to achieve the above technical features, the purpose of the present invention is realized as follows: A precision positioning structure for a spindle sleeve, including a housing, an inner sleeve hole is machined inside the housing, a support step is machined on the sleeve hole, the top of the support step supports a spindle sleeve, an annular cavity is formed between the spindle sleeve and the housing, a spindle is rotatably installed at the center of the spindle sleeve, and a radially arranged glue injection hole is machined on the housing, and the glue injection hole is communicated with the annular cavity; high-precision positioning glue is injected into the annular cavity.

[0005] Preferably, a sealing groove is machined at the position where the support step is located, a sealing ring is installed at the position of the sealing groove, and the sealing ring is in contact with the bottom end surface of the spindle sleeve for sealing.

[0006] Preferably, it further includes a sealing pressing plate, and the sealing pressing plate is pressed and fixed at the top of the spindle and the housing through fastening screws to seal the annular cavity; An overflow glue hole is machined on the sealing pressing plate, and the overflow glue hole is communicated with the top of the annular cavity.

[0007] Preferably, the tail end of the glue injection hole is an internal threaded hole, and the internal threaded hole is threadedly connected with a glue injection head.

[0008] Preferably, on the other hand, the present invention provides a precision positioning method for a spindle sleeve. The method is implemented by using the precision positioning structure for a spindle sleeve according to any one of claims 1-4, and includes the following steps: Step 1, Assembly of the Spindle Sleeve and the Spindle: First, install the spindle inside the spindle sleeve to complete the assembly of the two. Step 2, Installation of the Sealing Ring: Position and install the sealing ring on the sealing groove. Step 3, Positioning and Installation of the Spindle Sleeve: Install the assembled spindle sleeve from Step 1 into the interior of the housing. Step 4, Axis Positioning of the Spindle: Use a dial indicator with a magnetic base to position and adjust the spindle so that its axis meets the installation accuracy requirements. Step 5, Sealing of the Top of the Annular Cavity: Seal the top of the annular cavity. Step 6, Glue Sealing of the Annular Cavity: Inject glue into the interior of the annular cavity through the glue injection hole for glue sealing. Step 7, Plugging of the Glue Injection Hole: After the glue injection is completed, plug the glue injection hole with a sealing plug. Step 8, Curing of the High-Precision Positioning Glue: Let it stand for a period of time until the high-precision positioning glue is completely cured. Step 9, Removal of the Sealing Pressing Plate.

[0009] Preferably, Step 4 specifically includes: Install a dial indicator with a magnetic base on the end face of the housing, manually rotate the spindle to take readings and align the positioning outer circle of the spindle to be within 0.003 - 0.005 mm; remove the dial indicator with a magnetic base.

[0010] Preferably, Step 5 specifically includes: Fix and install a sealing pressing plate on the top of the spindle sleeve through fastening screws, and then seal the annular cavity through the sealing pressing plate.

[0011] Preferably, Step 6 specifically includes: Inject the high-precision positioning glue into the annular cavity between the spindle sleeve and the housing through the glue injection hole, and control the glue injection amount by observing the overflow degree of the high-precision positioning glue in the overflow hole on the sealing pressing plate to ensure that the high-precision positioning glue fills the entire annular cavity.

[0012] Preferably, Step 8 specifically includes: Keep all parts standing for more than 24 hours until the high-precision positioning glue is completely cured.

[0013] Preferably, Step 9 specifically includes: After the curing is completed, remove the fastening screws and then remove the sealing pressing plate.

[0014] The present invention has the following beneficial effects: 1. The present invention is mainly used for the positioning and installation of the spindle sleeve during the assembly of precision spindle components. It is required that the spindle sleeve be firmly and stably installed without deformation after installation, and it should be convenient for workers to install and operate. After adopting the precise positioning method of the spindle sleeve, not only the processing difficulty of the spindle sleeve machine housing is reduced, but also the positioning during assembly is stable and reliable, and the positioning accuracy is improved, greatly reducing the operation difficulty of assembly workers.

[0015] 2. The present invention realizes the combined connection between the housing and the spindle sleeve by using a high-precision positioning adhesive, which also facilitates the subsequent disassembly between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the drawings and embodiments.

[0017] Figure 1 It is a spindle measurement diagram of the present invention.

[0018] Figure 2 It is a glue injection state diagram of the present invention.

[0019] In the figure: sealing ring 1, housing 2, spindle sleeve 3, annular cavity 4, glue injection hole 5, magnetic base dial indicator 6, spindle 7, high-precision positioning adhesive 9, sealing pressure plate 10, glue overflow hole 11, fastening screw 12, support step 13, sealing groove 14, bushing hole 15, internal threaded hole 16. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The embodiments of the present invention will be further described below in conjunction with the drawings.

[0021] Embodiment 1: Refer to Figures 1 - 2 , a precise positioning structure of a spindle sleeve, including a housing 2, an internal bushing hole 15 is machined in the housing 2, a support step 13 is machined on the bushing hole 15, the top of the support step 13 supports a spindle sleeve 3, an annular cavity 4 is formed between the spindle sleeve 3 and the housing 2, a spindle 7 is rotatably installed at the center of the spindle sleeve 3, a radially arranged glue injection hole 5 is machined on the housing 2, and the glue injection hole 5 is communicated with the annular cavity 4; high-precision positioning adhesive 9 is injected into the annular cavity 4. By adopting the above positioning structure, first install the sealing ring into the housing, then install the spindle into the spindle sleeve and then place the whole into the housing to press the sealing ring. Secondly, after accurately adjusting the position accuracy of the spindle sleeve, finally inject the high-precision positioning adhesive into the gap between the spindle sleeve and the housing through the glue injection hole, and use the high-precision positioning adhesive to accurately and stably connect and position it. The whole process is simple in operation, accurate and stable in positioning, not only saving the assembly time, improving the assembly accuracy, but also increasing the interchangeability of each part. This structure reduces the part processing difficulty, and the assembly is stable and reliable and easy to operate.

[0022] Further, a sealing groove 14 is machined at the position where the supporting step 13 is located, and a sealing ring 1 is installed at the position of the sealing groove 14. The sealing ring 1 is in contact with the bottom end surface of the spindle sleeve 3 for sealing. The sealing ring 1 can be used to fully seal the bottom end surface of the spindle sleeve 3, effectively preventing the leakage of the high-precision positioning glue 9 during the glue injection process.

[0023] Further, it further includes a sealing pressing plate 10. The sealing pressing plate 10 is pressed and fixed at the top ends of the spindle 7 and the housing 2 through fastening screws 12 to seal the annular cavity 4. Through the above-mentioned sealing pressing plate 10, it is convenient to seal the top of the annular cavity 4 during the glue injection process, thereby ensuring the sufficiency of subsequent glue injection.

[0024] Further, an overflow hole 11 is machined on the sealing pressing plate 10, and the overflow hole 11 communicates with the top of the annular cavity 4. By providing the overflow hole 11, it is convenient to judge whether leakage occurs during the subsequent glue injection process.

[0025] Further, the tail end of the glue injection hole 5 is an internal threaded hole 16, and the internal threaded hole 16 is connected to the glue injection head through threaded fit. Through the above-mentioned internal threaded hole 16, on the one hand, it is convenient to connect the glue injection head subsequently, thereby facilitating the glue injection process, and on the other hand, it is convenient to install a sealing plug to block the glue injection hole 5 subsequently.

[0026] Embodiment 2: On the other hand, the present invention provides a precise positioning method for a spindle sleeve, including the following steps: Step 1, assembly of the spindle sleeve 3 and the spindle 7: First, install the spindle 7 inside the spindle sleeve 3, and then complete the assembly of the two; Step 2, installation of the sealing ring 1: Position and install the sealing ring 1 on the sealing groove 14; Step 3, positioning and installation of the spindle sleeve 3: Install the assembled spindle sleeve 3 in step 1 into the housing 2; Step 4, axis positioning of the spindle 7: Use a magnetic base dial indicator 6 to position and adjust the spindle 7 so that its axis meets the installation accuracy requirements; Step 5, sealing the top of the annular cavity 4: Seal the top of the annular cavity 4; Step 6, glue injection and sealing of the annular cavity 4: Inject glue into the annular cavity 4 through the glue injection hole 5 for sealing; Step 7, plugging of the glue injection hole 5: After the glue injection is completed, use a sealing plug to block the glue injection hole 5; Step 8, curing of the high-precision positioning glue 9: Let it stand for a period of time until the high-precision positioning glue 9 is completely cured; Step 9, removal of the sealing pressing plate 10.

[0027] Further, the specific steps of step 4 include: Install a magnetic base dial indicator 6 on the end face of the housing 2, manually rotate the main shaft 7 to measure and align the outer circle of the main shaft positioning within 0.003 - 0.005 mm; remove the magnetic base dial indicator 6.

[0028] Further, the specific steps of step 5 include: fixedly install the sealing pressing plate 10 on the top of the main shaft sleeve 3 through the fastening screw 12, and then seal the annular cavity 4 through the sealing pressing plate 10.

[0029] Further, the specific steps of step 6 include: inject the high-precision positioning glue 9 into the annular cavity 4 between the main shaft sleeve 3 and the housing 2 from the glue injection hole 5, and control the glue injection amount by observing the overflow degree of the high-precision positioning glue 9 in the glue overflow hole 11 on the sealing pressing plate 10 to ensure that the high-precision positioning glue 9 fills the entire annular cavity 4.

[0030] Further, the specific steps of step 8 include: keep all parts standing for more than 24 hours until the high-precision positioning glue 9 is completely cured.

[0031] Further, the specific steps of step 9 include: after the curing is completed, remove the fastening screw 12, and then remove the sealing pressing plate 10.

Claims

1. A precise positioning structure for a spindle sleeve, characterized in that It includes a housing (2). A bushing hole (15) is machined inside the housing (2). A support step (13) is machined on the bushing hole (15). A main bushing (3) is supported on the top of the support step (13). An annular cavity (4) is formed between the main bushing (3) and the housing (2). A main shaft (7) is rotatably installed at the center of the main bushing (3). A glue injection hole (5) arranged radially is machined on the housing (2). The glue injection hole (5) is communicated with the annular cavity (4). High-precision positioning glue (9) is injected into the annular cavity (4).

2. The precision positioning structure of a spindle sleeve according to claim 1, characterized in that: A sealing groove (14) is machined at the position where the support step (13) is located. A sealing ring (1) is installed at the position where the sealing groove (14) is located. The sealing ring (1) is in contact with the bottom end face of the main bushing (3) for sealing.

3. The precision positioning structure of a spindle sleeve according to claim 1, wherein: It further includes a sealing pressing plate (10). The sealing pressing plate (10) is pressed and fixed at the top ends of the main shaft (7) and the housing (2) through fastening screws (12) to seal the annular cavity (4). An overflow glue hole (11) is machined on the sealing pressing plate (10). The overflow glue hole (11) is communicated with the top of the annular cavity (4).

4. The precision positioning structure of a spindle sleeve according to claim 1, characterized in that: The tail end of the glue injection hole (5) is an internal threaded hole (16). The internal threaded hole (16) is connected with a glue injection head through thread fit.

5. A precise positioning method for a spindle sleeve, characterized in that: The method is realized by using the precision positioning structure of a main bushing described in any one of claims 1-4, and includes the following steps: Step 1, assembly of the main bushing (3) and the main shaft (7): First, install the main shaft (7) inside the main bushing (3), and then complete the assembly of the two. Step 2, installation of the sealing ring (1): Position and install the sealing ring (1) on the sealing groove (14). Step 3, positioning and installation of the main bushing (3): Install the assembled main bushing (3) in step 1 into the housing (2). Step 4, axis positioning of the main shaft (7): With the aid of a magnetic base micrometer (6), position and adjust the main shaft (7) so that its axis meets the installation accuracy requirements. Step 5, top sealing of the annular cavity (4): Seal the top of the annular cavity (4). Step 6, glue injection and sealing of the annular cavity (4): Inject glue into the annular cavity (4) through the glue injection hole (5) for sealing. Step 7, plugging of the glue injection hole (5): After the glue injection is completed, plug the glue injection hole (5) with a sealing plug. Step 8, curing of the high-precision positioning glue (9): Let it stand for a period of time until the high-precision positioning glue (9) is completely cured. Step 9, removal of the sealing pressing plate (10).

6. The precise positioning method of a spindle sleeve according to claim 5, wherein, The specific content of step 4 includes: Install a magnetic base micrometer (6) on the end face of the housing (2). Manually rotate the main shaft (7) to measure and align the positioning outer circle of the main shaft to be within 0.003-0.005 mm. Remove the magnetic base micrometer (6).

7. The precision positioning method of a spindle sleeve according to claim 5, characterized in that The specific content of step 5 includes: Fix and install the sealing pressing plate (10) on the top of the main bushing (3) through fastening screws (12), and then seal the annular cavity (4) through the sealing pressing plate (10).

8. The precision positioning method of a spindle sleeve according to claim 5, characterized in that Step 6 specifically includes: injecting the high-precision positioning glue (9) into the annular cavity (4) between the spindle sleeve (3) and the housing (2) through the glue injection hole (5), and controlling the glue injection amount by observing the overflow degree of the high-precision positioning glue (9) in the glue overflow hole (11) on the sealing pressing plate (10) to ensure that the high-precision positioning glue (9) fills the entire annular cavity (4).

9. The precise positioning method of a spindle sleeve according to claim 5, characterized in that, Step 8 specifically includes: keeping all parts static for more than 24 hours until the high-precision positioning glue (9) is completely cured.

10. The precision positioning method of a spindle sleeve according to claim 5, characterized in that, Step 9 specifically includes: after the curing is completed, removing the fastening screw (12), and then removing the sealing pressing plate (10).

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