Adjustable center mechanism

Abstract

The invention belongs to the field of machine tool machining, and relates to an adjustable center mechanism which comprises a center shaft, a screw and a center arranged in the center shaft, a mounting seat mounted outside the center shaft through a bearing, and a second receiving disc and a block arranged at the upper part of the mounting seat, the relative positions of the tips are accurately adjusted in the P direction and the K direction through the double-screw-pitch screw, and rapid recovery of the precision of the machine tool is achieved. A free switching mechanism of the movable center and the fixed center is further designed, and the stability and precision of the centers in the machining process are ensured through a bearing and a locking device. The adjustable center mechanism has the advantages of being high in adjusting efficiency, high in precision, high in flexibility, high in adaptability, capable of reducing labor intensity and cost and the like, is suitable for various machining scenes, and provides powerful support for technical progress and industrial upgrading in the machining field.

Description

Technical Field

[0001] The invention belongs to the field of machine tool processing and relates to an adjustable center mechanism. Background Art

[0002] In the field of precision machining and manufacturing, the accuracy and stability of machine tools are key factors in determining product quality and production efficiency. As an indispensable equipment in the machining process, the performance of machine tools directly affects the dimensional accuracy, shape accuracy and surface quality of the workpiece. However, during the use of machine tools, especially after long-distance transportation, reinstallation or relocation, some problems often occur, the most prominent of which is the deviation of the concentricity of the external support top and the worktable.

[0003] Concentricity is a crucial parameter in mechanical processing. It requires that the axes of the rotating parts of the machine tool must maintain strict coaxiality during operation. Once the concentricity exceeds the specified range, it will cause increased vibration and noise during the processing, and even cause the workpiece to be scrapped or the machine tool to be damaged. The traditional center mechanism lacks flexibility because it is fixed on the center seat. Once installed, its position is relatively fixed, making it difficult to make subsequent adjustments and optimizations.

[0004] To solve this problem, technicians usually use some traditional adjustment methods, such as readjusting the column, drilling the reamer pin hole, etc. However, these methods are not only labor-intensive, but also require a lot of manpower and time. In addition, there are often large errors in the adjustment process, making it difficult to achieve the ideal adjustment effect. In addition, the traditional adjustment method is also limited by the structure and space of the machine tool, and the adjustment range is limited, which cannot meet some special processing requirements.

[0005] With the continuous development and progress of machining technology, the requirements for the accuracy and stability of machine tools are getting higher and higher. The traditional top mechanism can no longer meet the needs of modern machining, and there is an urgent need for a top mechanism that is adjustable, can easily and quickly restore the accuracy of machine tools, has a wide adjustment range, and has high adjustment accuracy. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide an adjustable top mechanism to solve the existing problems.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an adjustable centering mechanism, comprising a centering shaft, a screw and a centering pin arranged in the centering shaft, and a mounting seat installed outside the centering shaft through a bearing, a second receiving plate being arranged on the upper part of the mounting seat, and two blocks being arranged on the outside of the second receiving plate; corresponding screw holes are respectively provided on each block and on the mounting seat, a through hole is provided on the second receiving plate at a corresponding position between the block and the mounting seat, and a double-pitch screw is provided between the screw hole and the through hole for adjusting the relative position of the centering pin.

[0008] Optionally, a first receiving plate is fixedly mounted on the lower part of the mounting seat by a first screw, a single hole is opened on the side of the first receiving plate, and a stop screw is installed in the single hole for realizing free switching between the movable center and the fixed center.

[0009] Optionally, four bearings are provided, which are respectively arranged at the outer ends of the top shaft, and the top of the topmost bearing is locked by a locking nut sleeved on the outside of the top shaft.

[0010] Optionally, the mating surface between the bearing and the top shaft is provided with an inner spacer sleeve, and the mating surface between the bearing and the mounting seat is provided with an outer spacer sleeve.

[0011] Optionally, a plurality of mounting holes are opened on the top of the second receiving plate, and second screws are arranged in the holes.

[0012] Optionally, the top of the screw rod and the top shaft are matched to be provided with a first washer and a second washer respectively.

[0013] Optionally, a plurality of through holes are further provided at the bottom of the fixing seat, and a third screw connected to the second receiving plate is installed in the through holes.

[0014] Optionally, the block is fixedly mounted outside the second receiving plate by a fourth screw.

[0015] The beneficial effects of the present invention are:

[0016] 1) The traditional adjustment process of the center mechanism is cumbersome and time-consuming, but the present invention uses a double-pitch screw to make the adjustment of the blocks set in the P and K directions of the center more efficient and accurate. The operator can quickly and conveniently adjust the position of the center to restore the accuracy of the machine tool, thereby greatly improving the installation and debugging efficiency of the machine tool;

[0017] 2) The adjustable center mechanism of the present invention is flexible and versatile. The blocks set in the P direction and the K direction can be adjusted in two staggered positions at will, without the need for uniform distribution. This design enables the machine tool to have stronger adaptability and flexibility in dealing with different processing requirements and scenarios;

[0018] 3) The traditional adjustment method is labor-intensive and requires a lot of manpower and time; however, the adjustable top mechanism of the present invention can achieve precise adjustment of the top position through simple screw adjustment, greatly reducing labor intensity and labor costs.

[0019] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0021] Figure 1 A top view of the present invention;

[0022] Figure 2 for Figure 1 Middle AA section view;

[0023] Figure 3 for Figure 1 Middle BB section view;

[0024] Figure 4 A perspective view of the present invention;

[0025] Figure 5 It is a front view of the present invention;

[0026] Figure 6 It is a CC cross-sectional view of the present invention.

[0027] Figure numerals: top 1, top shaft 2, first screw 3, first connecting plate 4, bearing 5, mounting seat 6, inner spacer 7, outer spacer 8, locking nut 9, second screw 10, second connecting plate 11, screw 12, first washer 13, second washer 14, block 15, double pitch screw 16, third screw 17, fourth screw 18, stop screw 19. DETAILED DESCRIPTION

[0028] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0029] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0030] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0031] See also Figure 1 to Figure 6 , is an adjustable top mechanism, including a top shaft 2, a screw 12 and a top 1 arranged in the top shaft 2, and a mounting seat 6 installed outside the top shaft 2 through a bearing 5, a second receiving plate 11 is arranged on the upper part of the mounting seat 6, and two blocks 15 are arranged on the outside of the second receiving plate 11; each block 15 and the mounting seat 6 are respectively provided with corresponding screw holes, and a through hole is opened on the second receiving plate 11 at a corresponding position between the block 15 and the mounting seat 6, and a double-pitch screw 16 is arranged between the screw hole and the through hole for adjusting the relative position of the top 1, and a first receiving plate 4 is fixedly installed at the lower part of the mounting seat 6 by six first screws 3, and a single hole is opened on the side of the first receiving plate 4, and a stop screw 19 is installed in the single hole for realizing The movable top 1 and the fixed top 1 can be switched freely. Four bearings 5 ​​are provided, which are respectively arranged at the outer ends of the top shaft 2. The top of the topmost bearing 5 is locked by a locking nut 9 sleeved on the outside of the top shaft 2. The matching surface of the bearing 5 and the top shaft 2 is provided with an inner spacer 7, and the matching surface of the bearing 5 and the mounting seat 6 is provided with an outer spacer 8. A plurality of mounting holes are opened on the top of the second receiving plate 11, and a second screw 10 is arranged in the hole. The top of the screw 12 is matched with the top shaft 2 and a first washer 13 and a second washer 14 are respectively provided. Six through holes are also provided at the bottom of the fixed seat, and a third screw 17 installed and connected to the second receiving plate 11 is installed in the through hole. The block 15 is fixedly installed on the outside of the second receiving plate 11 by two fourth screws 18 respectively.

[0032] In this embodiment, two blocks 15 are provided, which are respectively provided along the P direction and the K direction of the mounting seat 6. The P direction and the K direction can be at two randomly staggered positions, and do not need to be evenly distributed, so the design is more flexible and changeable. The application of the variable pitch screw 12 can realize forward and backward movement in one direction, and the adjustment is flexible.

[0033] When the present invention is in use, the third screw 17 in the mounting seat 6 is first loosened for adjustment. The double-pitch screw 16 connects the mounting seat 6 and the second receiving plate 11 together. By using the adjusting member double-pitch screw 16 in conjunction with a micrometer, it can be confirmed whether the adjustment is in place. After the adjustment is in place, the third screw 17 can be tightened to maintain the adjustment accuracy.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. An adjustable top mechanism, characterized in that: It includes a top shaft, a screw and a top arranged in the top shaft, and a mounting seat mounted outside the top shaft through a bearing, a second receiving plate is arranged on the upper part of the mounting seat, and two blocks are arranged on the outside of the second receiving plate; Each block and the mounting seat are respectively provided with corresponding screw holes, and the second receiving plate is provided with through holes at corresponding positions between the blocks and the mounting seat, and double-pitch screws are provided between the screw holes and the through holes for adjusting the relative position of the top.

2. The adjustable top mechanism according to claim 1, characterized in that: A first receiving plate is fixedly mounted on the lower part of the mounting seat by a first screw. A single hole is opened on the side of the first receiving plate. A stop screw is installed in the single hole to realize free switching between the movable center and the fixed center.

3. The adjustable top mechanism according to claim 1, characterized in that: Four bearings are provided, which are respectively arranged at the outer ends of the top shaft, and the top of the topmost bearing is locked by a locking nut sleeved on the outside of the top shaft.

4. The adjustable top mechanism according to claim 3, characterized in that: The matching surface between the bearing and the top shaft is provided with an inner spacer sleeve, and the matching surface between the bearing and the mounting seat is provided with an outer spacer sleeve.

5. The adjustable top mechanism according to claim 1, characterized in that: A plurality of mounting holes are provided on the top of the second receiving plate, and second screws are arranged in the holes.

6. The adjustable top mechanism according to claim 1, characterized in that: The top of the screw rod and the top shaft are matched to be provided with a first washer and a second washer respectively.

7. The adjustable top mechanism according to claim 1, characterized in that: The bottom of the fixing seat is also provided with a plurality of through holes, and third screws connected to the second receiving plate are installed in the through holes.

8. The adjustable top mechanism according to claim 1, characterized in that: The block is fixedly mounted outside the second receiving plate by a fourth screw.

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