Boring shaft lubricating device
By designing a boring bar lubrication device, an external oil pump and felt gasket sealing structure are used to achieve clearance lubrication between the boring bar and the hollow spindle, solving the problem of difficult-to-control boring bar lubrication and improving machining accuracy and equipment life.
Patent Information
- Application Number
- CN202423067271.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-12
AI Technical Summary
The existing lubrication method for boring bars, which involves manually adding lubricating oil, is difficult to control, leading to wear and thermal deformation of the boring bar, which affects machining accuracy and efficiency.
A boring bar lubrication device is designed, which utilizes an external oil pump to actively and precisely inject oil through the oil inlet hole, combined with a felt gasket sealing structure, to achieve clearance lubrication between the boring bar and the hollow spindle, and achieves uniform distribution of lubricating oil through the oil supply ring and small holes.
It achieves effective lubrication between the boring bar and the hollow spindle, reduces wear, improves machining accuracy and equipment life, and reduces oiling costs.
Smart Images
Figure CN223643355U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a boring spindle lubrication device, belonging to the technical field of machine tool spindle manufacturing technology. Background Technology
[0002] The boring spindle is one of the main components of a boring machine. Its function is to transmit torque and rotary motion, while supporting the boring tool for boring operations. During boring, the boring spindle rotates to drive the boring tool to cut the workpiece, achieving the required machining accuracy and surface quality. The accuracy and rigidity of the boring spindle have a significant impact on the quality and efficiency of boring operations. To ensure the accuracy and rigidity of the boring spindle, it is usually manufactured using high-strength materials and undergoes precision machining and heat treatment. Furthermore, the boring spindle requires lubrication and cooling to reduce wear and thermal deformation. Current technology involves a manual oil filling hole at the front of the hollow spindle, requiring periodic manual lubrication. However, this manual lubrication cycle is difficult to control, easily leading to prolonged periods without lubrication, resulting in boring spindle wear and thermal deformation, directly affecting product machining accuracy. Summary of the Invention
[0003] The technical problem to be solved by this utility model is to provide a boring bar lubrication device. This boring bar lubrication device actively and precisely injects oil through an external oil pump and oil inlet hole to effectively lubricate and cool, thereby reducing wear and thermal deformation. At the same time, it can effectively control the amount of oil injected and reduce the cost of oil injection.
[0004] To solve the above problems, the specific technical solution of this utility model is as follows: a boring bar lubrication device, wherein the boring bar and the hollow spindle are coaxially fitted, and the hollow spindle and the boring bar are clearance fitted. An annular groove is provided on the outer circumference of the hollow spindle, and a plurality of small holes are evenly distributed on the annular groove. An oil supply ring is coaxially provided on the outer circumference of the hollow spindle, and an oil inlet hole is provided on the oil supply ring, which communicates with the annular groove. Grooves are provided at both ends of the inner circumference of the oil supply ring, and a felt pad is provided in the groove. The surface of the felt pad is in sealed contact with the outer circumference of the hollow spindle.
[0005] The outer end of the oil inlet hole is provided with a PT1 / 8 threaded hole, which is located in the radial direction of the oil supply ring.
[0006] The outer end face of the hollow spindle is bolted to the rear cover, and the outer edge of the rear cover contacts the end face of the oil supply ring.
[0007] A limiting stage is provided on the hollow spindle. The distance between the oil supply ring and the limiting stage at the end away from the rear pressure cover is L, where L is 5 to 12 mm.
[0008] The number of holes is four.
[0009] The boring bar lubrication device of this application adopts the above-mentioned structure, which not only has low processing cost, but also allows for adjustment of the oil injection frequency and amount according to the working conditions of the boring bar, effectively ensuring lubrication between the boring bar and the hollow spindle, reducing wear, and improving the processing accuracy and service life of the equipment. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the boring bar lubrication device. Detailed Implementation
[0011] like Figure 1 As shown, a boring bar lubrication device is provided, wherein the boring bar 1 and the hollow spindle 2 are coaxially fitted, and the hollow spindle 2 and the boring bar 1 are clearance fitted, with the clearance controlled between 0.008 and 0.012 mm. An annular groove 4 is provided on the outer circumference of the hollow spindle 2, and a plurality of small holes 6 are evenly distributed on the annular groove 4. In this embodiment, the number of small holes 6 is four. An oil supply ring 3 is coaxially provided on the outer circumference of the hollow spindle 2, and an oil inlet hole 8 is provided on the oil supply ring 3, which communicates with the annular groove 4. Grooves are provided at both ends of the inner circumference of the oil supply ring 3, and a felt pad 5 is provided in the groove. The surface of the felt pad 5 is in sealing contact with the outer circumference of the hollow spindle 2.
[0012] The outer end of the oil inlet hole 8 is provided with a PT1 / 8 threaded hole, which is located in the radial direction of the oil supply ring 3 and is used to connect with an external pipeline.
[0013] A rear pressure cover 7 is bolted to the outer end face of the hollow spindle 2, and the outer edge of the rear pressure cover 7 contacts the end face of the oil supply ring 3. A limiting platform 9 is provided on the hollow spindle 2, and the distance between the end of the oil supply ring 3 away from the rear pressure cover 7 and the limiting platform 9 is L, where L is 5-12mm. By limiting the axial movement distance of the inner oil supply ring 4 through the limiting platform 9 and the rear pressure cover 7, the installation error of the external pipeline can be adapted.
[0014] The working process of the boring bar lubrication device is as follows: The oil pump pipe is connected through the PT1 / 8 threaded hole of the inner oil supply ring 3. Lubricating oil enters the gap between the hollow spindle 2 and the boring bar 1 through four small holes 6 on the hollow spindle. As the boring bar extends and retracts, the lubricating oil is absorbed between the boring bar and the hollow spindle, achieving lubrication. This lubrication method has fewer structural parts, lower processing difficulty, and lower cost. Furthermore, the frequency and amount of oil injection can be adjusted according to the working conditions of the boring bar, effectively ensuring lubrication between the boring bar and the hollow spindle, reducing wear, and improving the machining accuracy and service life of the equipment.
Claims
1. A boring bar lubrication device, wherein the boring bar (1) and the hollow spindle (2) are coaxially fitted, and the hollow spindle (2) and the boring bar (1) are clearance fitted, characterized in that: An annular groove (4) is provided on the outer circumference of the hollow spindle (2), and several small holes (6) are evenly distributed on the annular groove (4); an oil supply ring (3) is coaxially provided on the outer circumference of the hollow spindle (2), and an oil inlet hole (8) is provided on the oil supply ring (3), which is connected to the annular groove (4); grooves are provided at both ends of the inner circumference of the oil supply ring (3), and a felt pad (5) is provided in the groove, and the surface of the felt pad (5) is in sealed contact with the outer circumference of the hollow spindle (2).
2. The boring bar lubrication device according to claim 1, characterized in that: The outer end of the oil inlet hole (8) is provided with a PT1 / 8 threaded hole, which is located in the radial direction of the oil supply ring (3).
3. The boring bar lubrication device according to claim 1, characterized in that: The outer end face of the hollow spindle (2) is connected to the back cover (7) by bolts, and the outer edge of the back cover (7) contacts the end face of the oil supply ring (3).
4. The boring bar lubrication device according to claim 3, characterized in that: A limiting platform (9) is provided on the hollow spindle (2). The distance between the end of the oil supply ring (3) away from the rear pressure cover (7) and the limiting platform (9) is L, where L is 5 to 12 mm.
5. The boring bar lubrication device according to claim 1, characterized in that: The number of holes (6) is four.