A machine tool swivel center stand

Abstract

The utility model provides a machine tool rotary center frame relates to machine tool processing technical field, including frame board, fixed ring board, bearing, long barrel and thread barrel. This machine tool rotary center frame, through fixed assembly installs center frame on machine tool guide rail, utilizes clamping bolt pre -tightening upper plate and lower plate to realize stable fixation. The work piece is worn into long barrel, adjusts the clamping screw rod to make it contact work piece gently. Remove sealed oil cap one pours lubricating oil, until the oil level covers most height of bearing ball, inserts sealed oil cap one completes sealing again. Work piece rotates under the drive of machine tool main shaft, through clamping mechanism drives long barrel and bearing outer ring synchronous rotation, the ball bearing rolls in lubricating oil, forms low friction rotation. Lubricating oil circulates in closed space, continuously provides lubrication for bearing, absorbs heat generated by friction simultaneously. This structure has improved the smoothness of rotation significantly, reduced vibration and jam phenomenon, improved the machining precision and surface quality of work piece.

Description

Technical Field

[0001] This utility model relates to the field of machine tool processing technology, and in particular to a machine tool rotary center frame. Background Technology

[0002] In the field of machine tool processing, the rotary center rest is an important auxiliary support device. It is mainly used to provide auxiliary support for workpieces with a large length-to-diameter ratio during the workpiece rotation process, so as to prevent the workpiece from bending and deforming due to its own weight or cutting force, thereby ensuring the machining accuracy and stability of the workpiece.

[0003] However, existing machine tool rotary headstocks generally suffer from poor rotational smoothness during actual use. The rotary headstock cannot be effectively lubricated, which increases frictional resistance, affects the smoothness of rotation, exacerbates wear between components, and shortens the service life of the equipment. Utility Model Content

[0004] This utility model provides a machine tool rotary center frame, which solves the problem of poor rotational smoothness mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a machine tool rotary center frame, comprising a frame plate, a fixed ring plate, a bearing, a long cylinder, and a threaded cylinder. The frame plate has an opening for the workpiece to pass through, an oil inlet groove, and an oil outlet groove on its lower surface. The fixed ring plate is fixed in the opening of the frame plate. The bearing includes an outer ring, balls, and an inner ring. The inner ring is bolted to the fixed ring plate. The long cylinder is fitted into the inner ring of the bearing. A liner is fixedly connected to one end of the long cylinder, and an outer plate is fixedly connected to one end of the liner. The outer plate is fixed to the outer ring of the bearing by a long screw. Multiple threaded cylinders are fixed to the side of the outer plate, and clamping screws are threadedly connected to the inside of each threaded cylinder.

[0006] Preferably, the lower end of the frame plate is provided with a fixing component, which includes an upper plate, a lower plate and clamping bolts. The upper plate is fixedly connected to the frame plate, and the lower plate is disposed below the upper plate. The upper plate is connected to the lower plate by clamping bolts.

[0007] Preferably, both the oil inlet groove and the oil outlet groove extend radially along the opening of the frame plate to the inner side of the opening, and the oil outlet groove and the oil inlet groove are circumferentially staggered.

[0008] Preferably, a sealing oil cap one is provided in the oil inlet groove, and a sealing oil cap two is provided in the oil outlet groove.

[0009] Preferably, the outer diameter of the elongated cylinder is the same as the inner diameter of the inner ring, and the outer diameter of the liner is the same as the inner diameter of the opening.

[0010] Preferably, the plurality of threaded cylinders are evenly distributed circumferentially on the outer plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] The center support is mounted on the machine tool guideway using a fixing assembly, and the upper and lower plates are pre-tightened with clamping bolts for secure fixation. The workpiece is then inserted into the long cylinder, and the clamping screws are adjusted to gently contact the workpiece. The sealing oil cap is removed, and lubricating oil is injected until the oil level covers most of the bearing balls. The sealing oil cap is then reinserted to complete the seal. Driven by the machine tool spindle, the workpiece rotates, causing the long cylinder and the outer ring of the bearing to rotate synchronously via the clamping mechanism. The bearing balls roll in the lubricating oil, creating a low-friction rotary motion. The lubricating oil circulates within the enclosed space, continuously lubricating the bearing while absorbing heat generated by friction. This structure significantly improves the smoothness of rotation, reduces vibration and jamming, and enhances the machining accuracy and surface quality of the workpiece. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the machine tool rotary center frame structure of this utility model;

[0014] Figure 2 This is a structural schematic diagram showing the installation position of the fixing component of this utility model;

[0015] Figure 3 This is a schematic diagram of the frame plate and the long cylinder of this utility model in combination;

[0016] Figure 4 This is an internal sectional view of the machine tool rotary center frame of this utility model;

[0017] Figure 5 This is a schematic diagram of the long cylindrical structure of this utility model;

[0018] Figure 6 This is a schematic diagram of the fixed ring plate structure of this utility model.

[0019] The following are the labels in the diagram: 1. Frame plate; 11. Opening; 12. Oil inlet groove; 13. Oil outlet groove; 2. Fixing ring plate; 3. Bearing; 31. Outer ring; 32. Ball bearing; 33. Inner ring; 4. Long cylinder; 41. Liner plate; 42. Outer plate; 5. Long screw; 6. Threaded cylinder; 61. Clamping screw; 7. Fixing assembly; 71. Upper plate; 72. Lower plate; 73. Clamping bolt; 8. Sealing oil cap one; 9. Sealing oil cap two. 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 scope of protection of the present utility model.

[0021] This utility model provides a machine tool rotary center frame, such as Figure 1 and Figure 2 As shown, the device includes a frame plate 1, a fixing ring plate 2, a bearing 3, a long cylinder 4, and a threaded cylinder 6. The frame plate 1 has an opening 11 for the workpiece to pass through. An oil inlet groove 12 is provided on the frame plate 1, and an oil outlet groove 13 is provided on the lower surface of the frame plate 1 for the injection and flow of lubricating oil. Both the oil inlet groove 12 and the oil outlet groove 13 extend radially along the opening 11 of the frame plate 1 to the inner side of the opening 11, and the oil outlet groove 13 is circumferentially staggered from the oil inlet groove 12. A sealing oil cap 8 is provided in the oil inlet groove 12, and a sealing oil cap 9 is provided in the oil outlet groove 13. The sealing oil cap 8 and the sealing oil cap 9 respectively seal the ports of the oil inlet groove 12 and the oil outlet groove 13. Figure 4 As shown, the lubricating oil is stored in the enclosed space formed by the frame plate 1, the fixed ring plate 2, and the bearing 3, ensuring that the bearing 3 is continuously immersed in the lubricating oil and improving the smoothness of rotation. A lubricating oil circulation channel is formed between the oil inlet groove 12, the oil outlet groove 13, and the enclosed space. Removing the sealing oil cap 9 allows for periodic oil changes via an external oil pump. The bearing 3, immersed in the lubricating oil, forms an oil film to assist lubrication. The rolling friction itself has low resistance, and with the help of the oil film, the coefficient of friction is further reduced, minimizing jamming and vibration during rotation.

[0022] Sealing cap 1 (8) and sealing cap 2 (9) are made of oil-resistant rubber and have good sealing performance.

[0023] like Figure 5 and Figure 6 As shown, the fixing ring plate 2 is fixed in the opening 11 of the frame plate 1. The bearing 3 includes an outer ring 31, a ball 32 and an inner ring 33. The inner ring 33 is bolted to the fixing ring plate 2. The long cylinder 4 is sleeved in the inner ring 33 of the bearing 3. One end of the long cylinder 4 is fixedly connected to a liner 41. The liner 41 is made of wear-resistant alloy material. One end of the liner 41 is fixedly connected to an outer plate 42, which is fixed to the outer ring 31 of the bearing 3 by a long screw 5. Multiple threaded cylinders 6 are fixed to the side of the outer plate 42. The multiple threaded cylinders 6 are evenly distributed circumferentially on the outer plate 42. The internal threads of the threaded cylinders 6 are connected to a clamping screw 61. Rotating the clamping screw 61 causes it to move along the axis of the threaded cylinder 6 to grip the workpiece radially.

[0024] like Figure 3 and Figure 4As shown, the outer diameter of the long cylinder 4 is the same as the inner diameter of the inner ring 33, and the outer diameter of the liner 41 is the same as the inner diameter of the opening 11.

[0025] like Figure 2 As shown, a fixing component 7 is provided at the lower end of the frame plate 1. The fixing component 7 includes an upper plate 71, a lower plate 72, and clamping bolts 73. The upper plate 71 is fixedly connected to the frame plate 1, and the lower plate 72 is located below the upper plate 71. The upper plate 71 is connected to the lower plate 72 by the clamping bolts 73. The clamping bolts 73 pass through the corresponding screw holes of the upper plate 71 and the lower plate 72. By tightening the nuts on the clamping bolts 73, the upper plate 71 and the lower plate 72 are clamped and fixed at the upper and lower ends of the machine tool guide rail, respectively, so as to realize quick assembly, disassembly, and position adjustment.

[0026] Using this utility model, such as Figure 1 and Figure 2 As shown, the center frame is mounted on the machine tool guide rail via the fixing assembly 7, and the upper plate 71 and lower plate 72 are pre-tightened using clamping bolts 73 to achieve a stable fixation. Then, the workpiece is inserted into the long cylinder 4, and the clamping screw 61 is adjusted to gently contact the workpiece. The sealing oil cap 8 is removed, and lubricating oil is injected until the oil level covers most of the height of the bearing balls 32. The sealing oil cap 8 is then inserted again to complete the seal. The workpiece rotates under the drive of the machine tool spindle, and the clamping mechanism drives the long cylinder 4 and the outer ring 31 of the bearing 3 to rotate synchronously. The bearing balls 32 roll in the lubricating oil, forming a low-friction rotary motion. The lubricating oil circulates within the enclosed space, continuously providing lubrication to the bearing 3 while absorbing the heat generated by friction. This structure significantly improves the smoothness of rotation, reduces vibration and jamming, and enhances the machining accuracy and surface quality of the workpiece.

[0027] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A machine tool rotary center frame, characterized in that, include: The frame plate (1) has an opening (11) for the workpiece to pass through, an oil inlet groove (12) is provided on the frame plate (1), and an oil outlet groove (13) is provided on the lower surface of the frame plate (1). A fixing ring plate (2) is fixed in the opening (11) of the frame plate (1); The bearing (3) includes an outer ring (31), balls (32) and an inner ring (33), the inner ring (33) being bolted to the fixing ring plate (2); A long cylinder (4) is fitted into the inner ring (33) of the bearing (3). A liner (41) is fixedly connected to one end of the long cylinder (4), and an outer plate (42) is fixedly connected to one end of the liner (41). The outer plate (42) is fixed to the outer ring (31) of the bearing (3) by a long screw (5). Threaded cylinders (6), a plurality of the threaded cylinders (6) are fixed to the side of the outer plate (42), and the internal threads of the threaded cylinders (6) are connected to clamping screws (61).

2. The machine tool rotary center frame according to claim 1, characterized in that, The lower end of the frame plate (1) is provided with a fixing component (7). The fixing component (7) includes an upper plate (71), a lower plate (72) and a clamping bolt (73). The upper plate (71) is fixedly connected to the frame plate (1). The lower plate (72) is located below the upper plate (71). The upper plate (71) is connected to the lower plate (72) by the clamping bolt (73).

3. The machine tool rotary center frame according to claim 1, characterized in that, Both the oil inlet groove (12) and the oil outlet groove (13) extend radially along the opening (11) of the frame plate (1) to the inner side of the opening (11), and the oil outlet groove (13) and the oil inlet groove (12) are circumferentially misaligned.

4. The machine tool rotary center frame according to claim 3, characterized in that, The oil inlet groove (12) is provided with a sealing oil cap one (8), and the oil outlet groove (13) is provided with a sealing oil cap two (9).

5. The machine tool rotary center frame according to claim 1, characterized in that, The outer diameter of the long cylinder (4) is the same as the inner diameter of the inner ring (33), and the outer diameter of the liner (41) is the same as the inner diameter of the opening (11).

6. The machine tool rotary center frame according to claim 1, characterized in that, The plurality of threaded cylinders (6) are evenly distributed circumferentially on the outer plate (42).

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