A high-precision self-centering gear grinding tool

Abstract

A high-precision self-centering gear grinding tool, including a positioning body, the positioning body includes an upper body and a lower body, the upper body includes a workpiece mounting hole and a quick clamping plate, and a plurality of the quick clamping plates are circumferentially distributed on the top surface of the upper body outside the workpiece mounting hole; the lower body includes a working chamber and a clamping device, the clamping device includes a sun gear, a planetary gear and an eccentric shaft, the sun gear is meshed with a plurality of the planetary gear outer gears, the planetary gear is connected to the bottom of the eccentric shaft, and a plurality of clamping grooves are provided on the lower body, the clamping grooves are connected to the working chamber, and the eccentric shaft is arranged in the clamping grooves. The sun gear drives the planetary gear to rotate, thereby driving the eccentric shaft to rotate to center the workpiece for simultaneous clamping, and finally the quick clamping plate clamps the workpiece, making the workpiece clamping more convenient without the need for early debugging and centering, reducing the labor intensity of workers and improving work efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of machine tool manufacturing, in particular to a high-precision self-centering gear grinding tool. Background Art

[0002] At present, the clamping devices used in the gear grinding (internal gear, external gear) tooling mainly include brackets, centering pieces and clamping pieces; the upper surface of the bracket has a positioning reference surface, and the centering piece is generally a mandrel; when grinding gears, a mandrel of corresponding size is selected, and the gear is placed on the positioning reference surface of the bracket, so that the workpiece mounting hole on the gear passes through the mandrel, thereby realizing the centering of the gear, and the clamping piece is used to limit the rotation of the gear relative to the workbench and the vertical movement of the gear relative to the centering piece. In the actual processing process, after a long period of processing, the centering piece will be deformed and worn, resulting in poor precision of the processed gear. In addition, the above-mentioned clamping device also has the following defects: when processing gears of different sizes, centering pieces of different sizes need to be replaced, and the clamping device can easily deform the workpiece. The tooling of the grinding processing method in the prior art cannot meet the high-precision requirements of gear grinding due to positioning accuracy and clamping force control. The workpiece is placed on the centering piece and needs to be manually aligned with a table with an accuracy of 0.001. The workpiece with strict requirements needs to be found within 0.005 microns in accuracy. The efficiency of this positioning method is extremely low, and further clamping of the workpiece after alignment is likely to cause micro-deviations, resulting in inaccurate processing, time-consuming and labor-intensive, inefficient, and a low pass rate for processed parts, which is not suitable for mass production. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a high-precision self-centering gear grinding tool, comprising a positioning body, the positioning body comprising an upper body and a lower body, the upper body is installed on the upper part of the lower body and is fixedly connected to the lower body;

[0004] The upper body comprises a workpiece mounting hole and a quick clamping plate, and a plurality of quick clamping plates are circumferentially distributed on the top surface of the upper body outside the workpiece mounting hole;

[0005] The lower body includes a working chamber and a clamping device, the clamping device includes a sun gear, a planetary gear and an eccentric shaft, the sun gear is meshed with a plurality of planetary gear external gears, the planetary gear is spline-connected with the bottom of the eccentric shaft, a plurality of clamping grooves are provided on the lower body, the clamping grooves are communicated with the working chamber, and the eccentric shaft is arranged in the clamping grooves.

[0006] Furthermore, a mounting table is provided at one end of the quick clamping plate, and a plurality of the mounting tables are fixedly connected to the top surface of the upper body. A clamping head is provided at the other end of the quick clamping plate, and the clamping head presses the workpiece to the top surface of the upper body.

[0007] Furthermore, the upper body is mounted on the upper portion of the lower body by means of positioning pins and bolts, and an eccentric shaft mounting groove is provided on the bottom surface of the upper body.

[0008] Furthermore, the top end of the eccentric shaft is arranged in the eccentric shaft installation groove, and the bottom end is connected to the planetary gear.

[0009] Furthermore, the working chamber comprises a processing table and a waste liquid recovery chamber, the processing table is arranged on the top surface of the waste liquid recovery chamber, the processing table is a boss with multiple fine-machining planes, and the bottom surface of the workpiece is in contact with the processing table.

[0010] Furthermore, the number and positions of the processing tables correspond to the quick-clamping plate, and the clamping groove is adjacent to the processing table.

[0011] Furthermore, a waste liquid discharge hole is provided on the side wall of the waste liquid recovery chamber, and a sun gear adjustment hole is provided on the bottom of the waste liquid recovery chamber.

[0012] Furthermore, a sun gear mounting groove and a planet gear mounting groove are provided on the bottom surface of the lower body, and a baffle is also provided on the bottom surface of the lower body. The baffle is arranged on the bottom surface of the sun gear and is coaxial with the sun gear. The baffle is fixedly connected to the lower body by a locating pin and a bolt.

[0013] Furthermore, there are three quick-clamping plates, three processing tables, three planetary gears and three eccentric shafts.

[0014] The advantages of the present invention are:

[0015] (1) The present invention arranges the upper body on top of the lower body workbench and inserts the positioning pin into the pin hole on the upper body, so that the workpiece mounting hole and the workbench position correspond to each other. Next, it is only necessary to put the workpiece on the workbench, rotate the sun gear to drive the planetary gear to rotate, and then drive the eccentric shaft to rotate to center the workpiece and clamp it at the same time. Finally, the workpiece is clamped with a quick clamping plate, making it more convenient to clamp the workpiece.

[0016] (2) The sun gear drives the planetary gear to rotate the eccentric shaft, which can achieve multi-angle clamping of the workpiece at the same time and realize instant center positioning without the need for centering by dialing, thus reducing the labor intensity of workers and improving work efficiency.

[0017] (3) The double fixation of clamping and pressing is adopted to realize the all-round fixation of the workpiece, and the micro-deviation of the workpiece during processing is eliminated. The double positioning disperses the positioning force, which can avoid the deformation of the workpiece caused by excessive clamping in order to prevent the workpiece from deviating during processing. It is not only quite simple in structure, but also can reduce the labor intensity of workers, improve work efficiency, and improve the accuracy and qualified rate of gear pressing.

[0018] (4) The present invention uses three processing tables to reduce the contact area and improve positioning accuracy.

[0019] (5) To ensure high-precision centering, the positioning reference of the workpiece is very high, which makes it difficult to load and unload the workpiece. If the positioning gap is increased, although the above disadvantages can be avoided, it requires manual calibration, which is time-consuming and labor-intensive. However, the half-clamping and half-pressing method can largely avoid the elastic deformation of the workpiece and is more conducive to the processing accuracy of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the present invention;

[0021] Figure 2 It is a structural diagram of another angle of the present invention;

[0022] Figure 3 This is a side view of the utility model;

[0023] Figure 4 This is a new exploded diagram for this utility model;

[0024] Figure 5 It is an exploded view of the present invention from another angle;

[0025] Figure 6 This is the internal structure diagram of the main body.

[0026] An upper body (1), a lower body (2), a workpiece mounting hole (3), a quick-clamping pressure plate (4), a mounting table (5), a clamping head (6), a working chamber (7), a sun gear (8), a planetary gear (9), an eccentric shaft (10), a clamping groove (11), an eccentric shaft mounting groove (12), a processing table (13), a baffle (14), a waste liquid recovery chamber (15), a waste liquid discharge hole (16), and a sun gear adjustment hole (17). DETAILED DESCRIPTION

[0027] The specific implementation modes of the present invention are further described in detail below in combination with the accompanying drawings. However, the following embodiments only list preferred embodiments, which only serve to explain and illustrate the present invention and cannot be understood as limiting the present invention.

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions.

[0029] The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] Example 1

[0033] like Figure 1-5 As shown, a high-precision self-centering gear grinding tool comprises a positioning body, wherein the positioning body comprises an upper body 1 and a lower body 2, wherein the upper body 1 is mounted on the upper part of the lower body 2 and is fixedly connected to the lower body 2;

[0034] The upper body 1 includes a workpiece mounting hole 3 and a quick clamping plate 4, and a plurality of quick clamping plates are circumferentially distributed on the top surface of the upper body outside the workpiece mounting hole;

[0035] The lower body 2 includes a working chamber 7 and a clamping device, and the clamping device includes a sun gear 8, a planetary gear 9 and an eccentric shaft 10. The sun gear 8 is meshed with multiple external gears of the planetary gear 9. The planetary gear 9 is connected to the bottom of the eccentric shaft 10. The lower body 2 is provided with multiple clamping grooves 11, and the clamping grooves 11 are connected to the working chamber 7. The eccentric shaft 10 is arranged in the clamping grooves 11.

[0036] One end of the quick clamping plate 4 is provided with a mounting table 5, and a plurality of the mounting tables 5 are fixedly connected to the top surface of the upper body 1. The other end of the quick clamping plate 4 is provided with a clamping head 6, and the clamping head 6 presses the workpiece to the top surface of the upper body 1.

[0037] The upper body 1 is mounted on the upper part of the lower body 2 through a positioning pin, and an eccentric shaft mounting groove 12 is provided on the bottom surface of the upper body 1. The top end of the eccentric shaft 10 is arranged in the eccentric shaft mounting groove 12, and the bottom end is connected to the planetary gear 9.

[0038] The working chamber 7 includes a processing table 13 and a waste liquid recovery chamber 15. The processing table 13 is arranged on the top surface of the waste liquid recovery chamber 15. The processing table 13 is a boss with multiple fine-machining planes, and the bottom surface of the workpiece is in contact with the processing table 13. The number and position of the processing tables 13 correspond to the quick clamping plate 4, and the clamping groove is adjacent to the processing table 13. The side wall of the waste liquid recovery chamber 15 is provided with a waste liquid discharge hole 16, and the bottom of the waste liquid recovery chamber 15 is provided with a sun gear adjustment hole 17.

[0039] The bottom surface of the lower body 2 is provided with a sun gear mounting groove and a planet gear mounting groove. The bottom surface of the lower body 2 is also provided with a baffle 14. The baffle 14 is arranged on the bottom surface of the sun gear 8 and is coaxial with the sun gear 8. The baffle 14 is fixedly connected to the lower body 2 through a locating pin.

[0040] The number of the quick clamping plate 4 , the processing table 13 , the planetary gear 9 and the eccentric shaft 10 are all three.

[0041] Example 2

[0042] During specific implementation, the workpiece is placed on the processing table in the center of the lower body, and the sun gear is driven to rotate by inserting the hexagonal wrench into the adjustment hole. The sun gear drives the three planetary gears to rotate synchronously, thereby driving the eccentric shaft to rotate. At the same time, the workpiece is clamped to the center position instantly, and then the workpiece is clamped by the quick clamping plate. This design is easier to operate, has high loading and unloading efficiency, and the positioning accuracy can be as high as within 0.005 microns. The corresponding positions of the processing table and the quick clamping plate can enable the pressure plate to press the workpiece onto the processing table.

[0043] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. Simple combination changes thereof are all within the protection of the present invention.

Claims

1. A high-precision self-centering gear grinding tool, comprising a positioning body, characterized in that: The positioning body comprises an upper body (1) and a lower body (2), wherein the upper body (1) is mounted on the upper part of the lower body (2) and is fixedly connected to the lower body (2); The upper body (1) comprises a workpiece mounting hole (3) and a quick clamping plate (4), wherein a plurality of the quick clamping plates are distributed in a circle on the top surface of the upper body outside the workpiece mounting hole; The lower body (2) comprises a working chamber (7) and a clamping device, wherein the clamping device comprises a sun gear (8), a planetary gear (9) and an eccentric shaft (10), wherein the sun gear (8) is meshed with a plurality of external gears of the planetary gear (9), and the planetary gear (9) is spline-connected with the bottom of the eccentric shaft (10), and the lower body (2) is provided with a plurality of clamping grooves (11), wherein the clamping grooves (11) are communicated with the working chamber (7), and the eccentric shaft (10) is arranged in the clamping grooves (11); One end of the quick clamping plate (4) is provided with a mounting table (5), a plurality of the mounting tables (5) are fixedly connected to the top surface of the upper body (1), and the other end of the quick clamping plate (4) is provided with a clamping head (6), and the clamping head (6) presses the workpiece to the top surface of the upper body (1); The upper body (1) is mounted on the upper part of the lower body (2) via positioning pins and bolts, and an eccentric shaft mounting groove (12) is provided on the bottom surface of the upper body (1).

2. The high-precision self-centering gear grinding tool according to claim 1 is characterized in that: The top end of the eccentric shaft (10) is arranged in the eccentric shaft installation groove (12), and the bottom end is connected to the planetary gear (9) by means of a spline and is positioned by means of two pairs of bearings.

3. The high-precision self-centering gear grinding tool according to claim 1 is characterized in that: The working chamber (7) comprises a processing table (13) and a waste liquid recovery chamber (15); the processing table (13) is arranged on the top surface of the waste liquid recovery chamber (15); the processing table (13) is a boss with multiple precision-processed planes.

4. The high-precision self-centering gear grinding tool according to claim 3 is characterized in that: The number and position of the processing tables (13) correspond to the quick-clamping pressure plate (4), and the clamping groove is adjacent to the processing table (13).

5. The high-precision self-centering gear grinding tool according to claim 3 is characterized in that: A waste liquid discharge hole (16) is provided on the side wall of the waste liquid recovery chamber (15), and a sun gear adjustment hole (17) is provided on the bottom of the waste liquid recovery chamber (15).

6. The high-precision self-centering gear grinding tool according to claim 1 is characterized in that: The bottom surface of the lower body (2) is provided with a sun gear mounting groove and a planet gear mounting groove. The bottom surface of the lower body (2) is also provided with a baffle (14). The baffle (14) is arranged on the bottom surface of the sun gear (8) and is coaxial with the sun gear (8). The sun gear is positioned via two pairs of bearings. The baffle (14) is fixedly connected to the lower body (2) via a positioning pin and a bolt.

7. The high-precision self-centering gear grinding tool according to claim 1 is characterized in that: The quick-clamping pressure plate (4), the processing table (13), the planetary gear (9) and the eccentric shaft (10) are three in number.

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