A face air bearing spiral groove forming machine tool

Abstract

The utility model discloses a kind of end face air bearing helical groove forming machine tools, it is related to machining equipment technical field, it aims at solving the problem of high cost, low efficiency of end face air bearing helical groove processing in prior art, the technical scheme used is, including bed, main shaft assembly, tailstock assembly, axial driving device and angle driving device, the both ends of bed are respectively installed with main shaft assembly and tailstock assembly, and main shaft assembly and tailstock assembly are coaxially arranged, tailstock assembly and main shaft assembly are respectively equipped with workpiece to be processed and abrasive tool to workpiece processing, workpiece to be processed and abrasive tool position correspond;Axial driving device is used to drive main shaft assembly to do reciprocating motion on bed;Angle driving device is used to change the inclination angle of tailstock assembly, cooperate main shaft assembly to complete the processing of workpiece;Through servo reduction motor drive tailstock assembly inclination, spiral angle can be flexibly adjusted, adapt to workpiece helical groove processing, and strong universality.

Description

Technical Field

[0001] This utility model relates to the field of mechanical processing equipment technology, specifically to a machine tool for forming spiral grooves on the end face of air bearings. Background Technology

[0002] Faced air bearings are precision components that rely on the hydrodynamic effect of the helical grooves on their end faces to form an air film support. The machining accuracy of these helical grooves directly affects the bearing's load-bearing capacity and stability. In existing technologies, the machining of the helical grooves in faced air bearings mainly employs photolithography or laser etching processes. Photolithography requires multiple processes such as coating, exposure, development, and etching, resulting in a long processing cycle (2-4 hours per piece). It also relies on high-precision photolithography equipment and specialized photoresist, making it very expensive (equipment investment typically exceeds ten million yuan). It is only suitable for ultra-high precision small-batch production. Laser etching process removes material to form spiral grooves using a laser beam. Although the process is relatively simple, it suffers from problems such as low material removal efficiency (linear speed ≤50mm / s), high energy consumption, and heat-affected zones that are prone to form at the edges of the grooves, making it difficult to meet the needs of mass industrial production.

[0003] Therefore, there is an urgent need for a low-cost, high-efficiency end-face air bearing spiral groove forming equipment that can guarantee processing consistency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a machine tool for forming spiral grooves of air bearings on the end face, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model discloses a face air bearing spiral groove forming machine tool. The technical solution adopted includes a bed, a spindle assembly, a tailstock assembly, an axial drive device, and an angle drive device. The spindle assembly and the tailstock assembly are respectively installed at both ends of the bed, and the spindle assembly and the tailstock assembly are coaxially arranged. The tailstock assembly and the spindle assembly are respectively provided with a workpiece to be processed and a grinding wheel for processing the workpiece, and the workpiece to be processed corresponds to the position of the grinding wheel. The axial drive device is used to drive the spindle assembly to reciprocate on the bed; The angle driving device is used to change the tilt angle of the tailstock assembly, and cooperates with the spindle assembly to complete the processing of the workpiece; The tailstock assembly is tilted by a servo geared motor, which allows for flexible adjustment of the helix angle to adapt to the machining of helical grooves on workpieces, making it highly versatile.

[0006] As a preferred embodiment of the present invention, the spindle assembly includes a spindle motor, a spindle system, and a slide. The spindle system is mounted on the slide. The spindle motor and the grinding wheel are respectively mounted at both ends of the spindle system. The spindle motor drives the grinding wheel to rotate through the spindle system.

[0007] As a preferred technical solution of this utility model, the tailstock assembly includes a tailstock body shaft system, a support, and a centering component. The tailstock body shaft system is rotatably connected to the support. The tailstock body shaft system and the main shaft assembly have an installation groove for mounting the workpiece on their opposite ends. The tailstock body shaft system is also provided with a centering component for limiting the position of the workpiece.

[0008] As a preferred embodiment of this utility model, the centering assembly comprises two sets, symmetrically arranged on both sides of the mounting groove. Each centering assembly includes a limiting clamp and a mounting pin. A sliding groove communicating with the mounting groove is provided on the tailstock body shaft. The limiting clamp is installed in the sliding groove by the mounting pin. The limiting clamp has an oblong groove adapted to the mounting pin. A spring is also provided between the mounting pin and the limiting clamp. Under the limiting action of the oblong groove and the reset action of the spring, the limiting clamp reciprocates in the sliding groove. The two sets of symmetrical centering assemblies achieve elastic clamping through the spring, which can ensure that the workpiece is firmly fixed, avoid clamping damage, and reduce processing offset errors.

[0009] As a preferred technical solution of this utility model, the limiting clamp is L-shaped, including a clamping part and a sliding part, and the waist-shaped groove is formed on the sliding part; the mounting pin includes an L-shaped limiting part and a mounting part, the mounting part is connected to the tailstock body shaft system and is adapted to the size of the waist-shaped groove, and the spring is mounted on the mounting part; the workpiece loading and unloading is realized by the elastic extension and retraction of the centering component, the axial feed and angle adjustment have a high degree of automation, and the processing efficiency is improved.

[0010] As a preferred embodiment of this utility model, the axial drive device includes a hydraulic cylinder and a guide rail. The hydraulic cylinder and the guide rail are mounted on the machine bed. The spindle assembly reciprocates along the guide rail under the drive of the hydraulic cylinder.

[0011] As a preferred embodiment of this utility model, a support seat is also installed on the bed, and a connecting seat is installed on the side wall of the spindle assembly. The two ends of the hydraulic cylinder are respectively hinged to the support seat and the connecting seat. The spindle assembly rotates at high speed and stably, the axial drive device feeds smoothly along the guide rail, and the parameters of the mold protrusion structure are accurate, ensuring good consistency of the spiral groove depth and groove shape, and meeting the requirements of precision machining.

[0012] As a preferred embodiment of this utility model, the angle driving device includes a mounting base and a servo geared motor. The mounting base is mounted on the bed, and the tailstock assembly is rotatably connected to the mounting base and driven by the servo geared motor.

[0013] As a preferred technical solution of this utility model, the grinding tool and the tailstock assembly have a raised structure on their facing surfaces, the helix angle of the raised structure is 18-36 degrees, and the groove depth is 30-100μm.

[0014] Compared with the prior art, the beneficial effects of this utility model are: this utility model drives the tailstock assembly to tilt by a servo geared motor, which can flexibly adjust the helix angle, adapt to the processing of the helical groove of the workpiece, and has strong versatility.

[0015] Two sets of symmetrical centering components achieve elastic clamping through springs, which can not only ensure that the workpiece is firmly fixed, but also avoid clamping damage and reduce machining offset errors.

[0016] The spindle assembly rotates at high speed and stably, the axial drive device feeds smoothly along the guide rail, and the mold protrusion structure parameters are accurate, ensuring good consistency in the spiral groove depth and groove shape, meeting the requirements of precision machining.

[0017] Workpiece loading and unloading are achieved through the elastic extension and retraction of the centering component. The axial feed and angle adjustment are highly automated, improving processing efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present utility model. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present utility model. Figure 2 ; Figure 3 This utility model is a localized explosion. Figure 1 ; Figure 4 This utility model is a localized explosion. Figure 2 ; Figure 5 This is a schematic diagram of the grinding tool structure of this utility model; Figure 6 This is a schematic diagram of the centering component structure of this utility model.

[0019] In the diagram: 1. Bed; 2. Spindle motor; 3. Support seat; 4. Spindle shaft system; 5. Hydraulic cylinder; 6. Connecting seat; 7. Servo geared motor; 8. Mounting seat; 9. Support; 10. Tailstock shaft system; 11. Mold; 12. Guide rail; 13. Mounting slot; 14. Limiting clamp; 15. Spring; 16. Mounting pin; 17. Waist-shaped groove; 18. Slide. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0021] like Figures 1 to 6 As shown, this utility model discloses a machine tool for forming spiral grooves of air bearings on the end face. The technical solution adopted includes a bed, a spindle assembly, a tailstock assembly, an axial drive device, and an angle drive device. The bed 1 serves as the overall load-bearing foundation, with the spindle assembly and tailstock assembly mounted at both ends, and the two are coaxially arranged. The tailstock assembly is used to mount the workpiece to be processed, and the spindle assembly is equipped with a grinding wheel 11 for machining the workpiece. The grinding wheel 11 is precisely aligned with the workpiece position to ensure accurate machining alignment.

[0022] The spindle assembly includes a spindle motor 2, a spindle shaft system 4, and a slide 18. The slide 18 supports the spindle shaft system 4, and the two ends of the spindle shaft system 4 are connected to the spindle motor 2 and the grinding mold 11, respectively. After the spindle motor 2 is started, it drives the grinding mold 11 to rotate through the spindle shaft system 4, providing cold rolling power for spiral groove machining.

[0023] The tailstock assembly includes a tailstock body shaft system 10, a support 9, and a centering assembly. The tailstock body shaft system 10 is rotatably connected to the support 9. The tailstock body shaft system 10 has a mounting groove 13 at the end facing the main spindle assembly for placing the workpiece to be processed.

[0024] Two sets of centering components are symmetrically distributed on both sides of the mounting groove 13, including a limiting clamp 14, a mounting pin 16, and a spring 15. A sliding groove communicating with the mounting groove 13 is provided on the tailstock shaft system 10, and the limiting clamp 14 is mounted in the sliding groove via the mounting pin 16. The limiting clamp 14 is L-shaped, including a clamping part and a sliding part. A waist-shaped groove 17 is provided on the sliding part, and the mounting part of the mounting pin 16 is sized to match the waist-shaped groove 17. The spring 15 is sleeved on the mounting part. Under the limiting action of the waist-shaped groove 17 and the restoring action of the spring 15, the limiting clamp 14 can reciprocate within the sliding groove, achieving elastic clamping and disassembly of the workpiece.

[0025] Mounting pin 16 includes an L-shaped limiting part and a mounting part. The mounting part is connected to the tailstock body shaft system 10, and the limiting part is used to limit the displacement of the limiting clamp 14 to ensure clamping stability.

[0026] The axial drive device includes a hydraulic cylinder 5 and a guide rail 12, both mounted on the bed 1. A support base 3 is also fixed on the bed 1, and a connecting seat 6 is mounted on the side wall of the spindle assembly. The two ends of the hydraulic cylinder 5 are hinged to the support base 3 and the connecting seat 6, respectively. When the hydraulic cylinder 5 extends or retracts, it drives the spindle assembly to reciprocate along the guide rail 12, providing axial feed power for the grinding wheel 11.

[0027] The angle drive device includes a mounting base 8 and a servo geared motor 7. The mounting base 8 is fixed on the bed 1, and the tailstock assembly is rotatably connected to the mounting base 8. The servo geared motor 7 drives the tailstock assembly to rotate around the mounting base 8, precisely changing the tilt angle of the tailstock assembly. This, combined with the axial feed of the spindle assembly, enables the cold rolling of the spiral groove.

[0028] The mold 11 and the tailstock assembly have a raised structure on their facing surfaces. The helix angle of the raised structure is 18 degrees and the groove depth is 30μm. This structure is precisely matched with the design parameters of the air bearing helical groove on the end face, ensuring that the helical groove formed meets the usage requirements. Example 2

[0029] The difference between this embodiment and Embodiment 1 is that: The helix angle of the raised structure is 36 degrees, and the groove depth is 100μm. Example 3

[0030] The difference between this embodiment and Embodiment 1 is that: The helix angle of the raised structure is 27 degrees, and the groove depth is 65 μm.

[0031] The working principle of this utility model: Clamping the workpiece: Fix the workpiece to be processed onto the tailstock shaft system 10 through the centering assembly to ensure that the end face of the workpiece is parallel to the end face of the mold 11; Initial angle setting: Servo reduction motor 7 drives support 9 to rotate to a preset angle, which corresponds to the initial helix angle of the helical groove; Mold rotation and pressurization: The spindle motor 2 drives the mold 11 to rotate at a set speed, while the hydraulic cylinder 5 pushes the spindle assembly to move along the guide rail 12 toward the workpiece, so that the mold 11 contacts the workpiece and applies stable pressure; Synchronous angle reset: The rotation of the grinding wheel 11 drives the workpiece to rotate synchronously, while the servo reduction motor 7 drives the support 9 to rotate in the opposite direction, gradually resetting to a horizontal state. The workpiece end face is cold rolled and plastically deformed by the protruding structure on the end face of the grinding wheel 11, forming a continuous spiral groove on the end face of the workpiece. Forming termination: When the support 9 returns to the horizontal position, the spiral groove is fully formed, the hydraulic cylinder 5 drives the spindle assembly to retract, and the workpiece is removed to complete the processing.

[0032] The circuits and mechanical connections involved in this utility model are common practices used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments. They are common knowledge.

[0033] Components not described in detail in this article are existing technologies.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A machine tool for forming spiral grooves on the end face of air bearings, characterized in that: The machine includes a bed (1), a spindle assembly, a tailstock assembly, an axial drive device, and an angle drive device. The spindle assembly and the tailstock assembly are respectively installed at both ends of the bed (1), and the spindle assembly and the tailstock assembly are coaxially arranged. The tailstock assembly and the spindle assembly are respectively provided with a workpiece to be processed and a grinding wheel (11) for processing the workpiece. The workpiece to be processed corresponds to the position of the grinding wheel (11). The axial drive device is used to drive the spindle assembly to reciprocate on the bed (1); The angle drive device is used to change the tilt angle of the tailstock assembly, and works with the spindle assembly to complete the machining of the workpiece.

2. The end-face air bearing spiral groove forming machine tool according to claim 1, characterized in that: The spindle assembly includes a spindle motor (2), a spindle system (4), and a slide (18). The spindle system (4) is mounted on the slide (18). The spindle motor (2) and the grinding wheel (11) are respectively mounted at both ends of the spindle system (4). The spindle motor (2) drives the grinding wheel (11) to rotate through the spindle system (4).

3. The end-face air bearing spiral groove forming machine tool according to claim 1, characterized in that: The tailstock assembly includes a tailstock body shaft system (10), a support (9), and a centering component. The tailstock body shaft system (10) is rotatably connected to the support (9). The tailstock body shaft system (10) and the main shaft assembly have an installation groove (13) for installing the workpiece on their opposite ends. The tailstock body shaft system (10) is also provided with a centering component for limiting the position of the workpiece.

4. The end-face air bearing spiral groove forming machine tool according to claim 3, characterized in that: The centering assembly is provided in two sets and is symmetrically arranged on both sides of the mounting groove (13). The centering assembly includes a limiting clamp (14) and a mounting pin (16). The tailstock body shaft system (10) is provided with a sliding groove that communicates with the mounting groove (13). The limiting clamp (14) is installed in the sliding groove through the mounting pin (16). The limiting clamp (14) is provided with a waist-shaped groove (17) that matches the mounting pin (16). A spring (15) is also provided between the mounting pin (16) and the limiting clamp (14). Under the limiting action of the waist-shaped groove (17) and the reset action of the spring (15), the limiting clamp (14) reciprocates in the sliding groove.

5. The end-face air bearing spiral groove forming machine tool according to claim 4, characterized in that: The limiting clamp (14) is L-shaped and includes a clamping part and a sliding part. The waist-shaped groove (17) is opened on the sliding part. The mounting pin (16) includes an L-shaped limiting part and a mounting part. The mounting part is connected to the tailstock body shaft system (10) and is adapted to the size of the waist-shaped groove (17). The spring (15) is mounted on the mounting part.

6. The end-face air bearing spiral groove forming machine tool according to claim 1, characterized in that: The axial drive device includes a hydraulic cylinder (5) and a guide rail (12). The hydraulic cylinder (5) and the guide rail (12) are mounted on the bed (1). The spindle assembly reciprocates along the guide rail (12) under the drive of the hydraulic cylinder (5).

7. The end-face air bearing spiral groove forming machine tool according to claim 6, characterized in that: A support seat (3) is also installed on the bed (1), and a connecting seat (6) is installed on the side wall of the spindle assembly. The two ends of the hydraulic cylinder (5) are respectively hinged to the support seat (3) and the connecting seat (6).

8. The end-face air bearing spiral groove forming machine tool according to claim 1, characterized in that: The angle driving device includes a mounting base (8) and a servo geared motor (7). The mounting base (8) is mounted on the bed (1). The tailstock assembly is rotatably connected to the mounting base (8) and driven by the servo geared motor (7).

9. The end-face air bearing spiral groove forming machine tool according to claim 1, characterized in that: The grinding wheel (11) and the tailstock assembly have a raised structure on their facing surfaces. The helix angle of the raised structure is 18-36 degrees and the groove depth is 30-100μm.

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