CN107442866B - Automatic-aligning chamfering processing mode and equipment - Google Patents

Abstract

The invention discloses an automatic-aligning chamfer machining device and a corresponding machining mode, and the automatic-aligning chamfer machining device comprises a body, a power source, a cutter and a transmission gear set, wherein the cutter is fixedly arranged at one end of a cutter rotating shaft, the cutter rotating shaft is arranged on the transmission gear set in a spinning mode, the transmission gear set is assembled in the body, the power source drives the cutter rotating shaft and the cutter to rotate at a high speed through the transmission gear set, the cutter rotating shaft and the cutter can revolve around the circle center of an inner hole to be machined, the revolution radius is variable, the distance between the equipment cutter and the circle center of the inner hole to be machined can be automatically adjusted, the automatic-aligning chamfer machining device can be better suitable for machining requirements of chamfers with different inner diameters, the cutter changing process is avoided, and the production efficiency is improved.

Description

An automatic centering chamfering processing method and equipment

technical field

The invention relates to a tool device for production in the field of mechanical processing, in particular to an automatic centering chamfering processing method and equipment.

Background technique

Chamfering is an inclined surface formed by grinding the end of the part or the edge of the inner hole in order to remove the burr generated by machining on the part and to facilitate the assembly of the part. In order to improve the efficiency of chamfering and to improve the quality and effect of chamfering, an automatic chamfering machine has emerged. Patent ZL201320462280.9 proposes an automatic chamfering equipment, which is equipped with a feed device, so that the drive spindle can automatically approach the part when it is running, and at the same time, the tool is driven by the connecting shaft and the gear set under the drive spindle to realize the rapid machining of chamfering; another patent application ZL201610785228.5 proposes to use a pneumatic device to Shaft holes of fixed models are internally chamfered. Obviously, the above two automatic chamfering machines can improve the efficiency and quality of chamfering processing, but they cannot simultaneously meet the processing requirements of different types of shaft holes or round chamfering of workpiece ends.

Taking the chamfering of inner holes as an example, most of the automatic chamfering machines on the market are one hole to one knife, that is, one type of hole corresponds to one type of tool. For the chamfering of some variable inner holes, It is necessary to replace the tool, and often need to calibrate it after the tool is replaced. Obviously, the process of changing the tool and installing the tool will take a certain amount of production time, which will affect the production efficiency of the factory. The traditional automatic chamfering machine needs to change the tool frequently when processing the chamfering of the variable inner hole, which is time-consuming, laborious and inefficient, and needs to be further improved.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the above-mentioned deficiencies, provide a chamfering processing method and equipment that can adapt to the processing requirements of the inner hole diameter within a certain range, and avoid automatic centering during the tool change process. The application of it can further improve the processing efficiency of inner hole chamfering, and the operation is simple and easy.

For solving the problems of the technologies described above, the technical solution of the present invention is:

A self-aligning chamfering processing equipment, including a body, a power source, a tool and a transmission gear set, wherein the tool is fixedly installed on one end of a knife shaft, and the knife shaft is rotatably mounted on the transmission gear set, and the transmission gear set Assembled in the body, the cutter shaft and tool can revolve around the inner hole to be processed or the center of the workpiece end face with a variable revolution radius, and the power source drives the cutter shaft and tool to rotate at high speed through the transmission gear set.

Preferably, it also includes a self-adjusting mechanism for revolution radius. The power source is simultaneously connected and drives the self-adjusting mechanism for revolution radius to automatically adjust the revolution radius of the cutter shaft and the tool. Through the self-adjustment mechanism for revolution radius, the equipment can adapt to various inner holes of different sizes. Or round chamfering of the workpiece section.

Preferably, the body includes a box cover with an opening downward, and a box plate is arranged inside the box cover, and a positioning ring is covered under the box cover to control the depth of the chamfering.

Preferably, the power source is connected to one end of the power shaft, and the other end of the power shaft is fixedly connected to the power gear, and the power gear is connected to the first double gear. The first big wheel and the power gear mesh with each other; there is also a second double gear in the box plate. The second double gear is composed of the second big wheel and the second small wheel superimposed on the same axis. The first big wheel Mesh with the second small wheel; the second big wheel meshes with the first gear and drives the first gear shaft to rotate, the first gear is fixed on one end of the first gear shaft, and the middle section of the first gear shaft is fixed to the second gear shaft through the first key. Gear; the cutter shaft is also equipped with a third gear, the third gear and the cutter are fixedly installed at both ends of the cutter shaft respectively, the second gear and the third gear mesh with each other, and the third gear drives the cutter shaft and the cutter to rotate automatically, the power gear, The first bull wheel, the second double gear, the first gear, the second gear and the third gear together form a transmission gear set.

Preferably, it also includes a self-adjusting mechanism for the radius of revolution. The self-adjusting mechanism for the radius of revolution includes a sun gear and planetary gears distributed on the periphery of the sun gear. At the center of Shangfei gear, there is a tool shaft hole that runs through the upper and lower planes of the gear. The tool shaft can spin through the tool shaft hole. There is a self-aligning bearing under the tool, and the other end of the first gear shaft that runs through the box plate runs through the planetary gear. center of.

Preferably, three identical planetary gears are distributed on the periphery of the central gear. One end of the central shaft passes through the central gear and drives the central gear to rotate. A steering gear is arranged between them, the first duplex gear is fixed on the second gear shaft, the steering gear is fixed on the steering gear shaft, and the power shaft, the second gear shaft and the steering gear shaft are movably connected to the inner surface of the case cover through bearings.

Preferably, handles are symmetrically distributed on the outer side of the side wall of the box cover for holding and stabilizing the device.

Preferably, a ratchet structure is provided between the planetary gear and the box plate to realize the locking of the revolution radius of the tool.

An automatic centering chamfering processing method, which comprises the following steps:

Step 1: Install the central gear and multiple planetary gears distributed on the periphery of the central gear on the chamfering processing equipment. The central gear meshes with all the planetary gears, and a knife shaft can be rotatably inserted in the non-gear center of the planetary gear and kept The distance from all the cutter shafts to the center of the central gear is equal at all times, and the cutter is fixed on one or more cutter shafts and rotates with the cutter shaft;

Step 2: Place all the cutter shafts in the inner hole to be processed, and change the distance synchronously to realize the automatic alignment between the center of the central gear and the center of the inner hole to be processed;

Step 3: While the tool is spinning, it revolves around the center of the inner hole to be processed along with the tool axis to complete the chamfering of the inner hole.

Preferably, the rotation of the knife shaft in step 1, the automatic centering of the center gear in step 2 and the center of the inner hole to be processed, and the revolution of the knife shaft in step 3 around the center of the inner hole to be processed are all synchronized by the same power source Control is achieved.

After adopting the above scheme, the present invention has the following advantages:

1. The pneumatic power source used by the equipment is not only used to drive the tool, but also can be used for automatic centering to realize multiple utilization of energy, simplify the centering work during chamfering processing, and improve the quality of chamfering processing;

2. The distance between the equipment tool and the center of the inner hole to be processed can be automatically adjusted, which is better suitable for the processing requirements of different inner diameter chamfering, which improves the problem that the existing inner hole chamfering equipment has too single function, and also avoids the process of changing tools, improving Improve the work efficiency of chamfering and reduce the risk of workers during tool change;

3. The combination of gear and ratchet is used to drive the machining tool and limit the position of the tool. It can not only automatically adjust the tool to meet the processing requirements of different inner diameter chamfering, but also has a simple structure, light device and quick operation. All parts are Standard parts, easy to repair and replace;

4. By adding a ratchet structure between the planetary gear and the box plate, the planetary gear can avoid the reverse movement of the planetary gear relative to the central gear after the centering is completed, and realize the locking of the revolution radius of the tool.

Description of drawings

Fig. 1 is an explosion diagram of the present invention;

Fig. 2 is a sectional view of the present invention after assembly;

Fig. 3 is a three-dimensional view of the internal structure of the present invention;

Fig. 4 is a sectional view of the internal structure of the present invention;

Fig. 5 is a perspective view of the central shaft of the present invention;

Fig. 6 is a bottom view of the internal structure of the present invention;

Fig. 7 is a top view of the internal structure of the present invention;

Fig. 8 is the distribution view of internal structure ratchet of embodiment two;

Fig. 9 is a distribution view of ratchets in the internal structure of Embodiment 3;

Fig. 10 is a distribution view of another ratchet pawl in the second embodiment.

Label description

Case cover 11 positioning ring 12 case plate 13 fixed plate 14 fixed shaft 15

Cutter 2 Cutter shaft 21 Third gear 23 Self-aligning bearing 24

Power shaft 3 Power source 30 Source through hole 31 Power gear 32

The first small wheel 41 the first big wheel 42 the second gear shaft 43

The second small wheel 51 The second big wheel 52

Central shaft 6 Fourth gear 61 Steering gear 62 Steering gear shaft 63 Second key 64

First gear 71 First gear shaft 72 First key 73 Second gear 74

Central gear 81 Planetary gear 82 Tool shaft hole 83

Pawl 91 Ratchet 92.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Embodiment one:

What the present invention discloses is an automatic centering chamfering processing equipment, as shown in Figure 1-2, which is a preferred embodiment of the present invention. The equipment includes a body, a power source 30, a tool 2 and a transmission gear set, wherein , the power source 30 can choose a common pneumatic power source, the cutter 2 is fixedly installed on one end of the cutter shaft 21, and the cutter shaft 21 can be mounted on the transmission gear set that is rotatable, and the transmission gear set is assembled in the body. When the equipment is running, The tool rotating shaft 21 and the tool 2 can revolve around the center of the inner hole to be processed or the end surface of the workpiece with a variable revolution radius. The power source 30 drives the tool rotating shaft 21 and the tool 2 to rotate at high speed through the transmission gear set. The high-speed rotation of the tool 2 can realize the cutting of the part port, and its revolution around the center of the inner hole to be processed can travel at a uniform speed for one circle at the port to complete the processing of the entire inner hole or the round chamfering of the end surface of the workpiece.

Specifically, the body of the device includes a case cover 11 with an opening downward, and the case cover 11 is a barrel-shaped structure, and a case plate 13 with an upward opening is arranged inside the case cover 11, and the case cover 11 and the case plate 13 can rotate relatively around the same axis. Case cover 11 and case plate 13 can be used for the installation of transmission gear set. A locating ring 12 is covered under the case cover 11, and the locating ring 12 can be an annular structure connected to the opening of the case cover 11 through a threaded cover. Since the cutter 2 is fixed on the case cover 11 and the case plate 13 by the cutter rotating shaft 21 and the transmission gear set, so its height relative to the upper surface of the case cover 11 is constant, when the height of the positioning ring 12 relative to the upper surface of the case cover 11 is adjusted by thread rotation At this time, the tool 2 will protrude from the lower surface of the positioning ring 12 to varying degrees. When processing the chamfering of the inner hole, since the positioning ring 12 can be clamped on the peripheral edge of the inner hole of the workpiece, the tool 2 will extend into the inner hole to be processed to varying degrees. Holes, to achieve rapid processing of chamfering of inner holes with different depths.

The power source 30 is connected with one end of the power shaft 3, and the power shaft 3 is mounted on the case cover 11 through bearing rotation, and the case cover 11 is provided with a source through hole 31, and the power source 30 is connected with one end of the power shaft 3 through the source through hole 31, The other end of the power shaft 3 is fixedly connected to the power gear 32, and the power gear 32 is connected to the first double gear. The first double gear is composed of the first large wheel 42 and the first small wheel 41 coaxially stacked. The first large wheel 42 Intermeshing with the power gear 32, the first double gear is fixed on one end of the second gear shaft 43, and the other end of the second gear shaft 43 is mounted on the case cover 11 through bearing rotation; gear, the second double gear is composed of the second large wheel 52 and the second small wheel 51 coaxially stacked, the first large wheel 42 and the second small wheel 51 mesh with each other, and the second double gear is movably socketed in a center On the rotating shaft 6, the central rotating shaft 6 plays a role in positioning the second double gear. One end of the central rotating shaft 6 is installed on the center position of the case cover 11 through bearing rotation, and the central rotating shaft 6 also passes through the center position of the case plate 13, and the first double gear and the second double gear are arranged between the case cover 11 and the case plate 13 Between the box cover 11 and the box plate 13, there is also a first gear 71, the second big wheel 52 meshes with the first gear 71 and drives the first gear shaft 72 to rotate, and the first gear 71 is fixed on the first gear shaft 72 one end, the first gear shaft 72 runs through the case plate 13 and is mounted on the case plate 13 by bearing rotation, and on the other side of the case plate 13, the second gear 74 is fixed in the middle section of the first gear shaft 72 through the first key 73; A third gear 23 is fixed at the end of the cutter shaft 21 that is different from the cutter 2. The second gear 74 meshes with the third gear 23, and the third gear 23 drives the cutter shaft 21 and the cutter 2 to rotate. The power gear 32, the first bull wheel 42, the second double gear, the first gear 71, the second gear 74 and the third gear 23 together form a transmission gear set to drive the tool to rotate.

The variable revolution radius of the equipment is mainly realized by the revolution radius self-adjusting mechanism. The power source 30 can be connected to and drive the revolution radius self-adjustment mechanism at the same time to automatically adjust the revolution radius of the cutter shaft 21 and the tool 2 . Specifically, the revolution radius self-adjusting mechanism includes a central gear 81 and planetary gears 82 distributed on the periphery of the central gear 81, the central gear 81 meshes with all the planetary gears 82, and the central gear 81 and the planetary gears 82 are arranged on the box plate 13 and the positioning ring 12 Meanwhile, in this embodiment, there may be three identical planetary gears 82 distributed on the periphery of the central gear 81 . One end of the central shaft 6 passes through the central gear 81 and drives the central gear 81 to rotate, and the other end of the central shaft 6 is affixed with a fourth gear 61, and the second key 64 can be set between the central shaft 6 and the fourth gear 61. The two rotate relative to each other. A steering gear 62 is arranged between the fourth gear 61 and the first small wheel 41, the first duplex gear is fixed on the second gear shaft 43, the steering gear 62 is fixed on the steering gear shaft 63, the power shaft 3, the second gear shaft 43 and steering gear shaft 63 are movably connected on case cover 11 inner surface by bearing.

There is also a fixed plate 14 between the positioning ring 12 and the case plate 13, and the fixed shaft 15 fixes the case plate 13 and the fixed plate 14. The non-gear center of the planetary gear 82 is distributed with a tool shaft hole 83 that runs through the upper and lower planes of the gear. The cutter shaft 21 can spin through the cutter shaft hole 83, the cutter shaft 21 is mounted on the planetary gear 82 through the bearing rotation, the self-aligning bearing 24 is also arranged under the cutter 2, the cutter shaft 21 of the three planetary gears 82 and the central gear 81 The distance remains the same and changes synchronously. In this embodiment, the cutter 2 is only provided at one end of one cutter rotating shaft 21. In fact, the cutter 2 can also be arranged at one end of a plurality of cutter rotating shafts 21. The other end of the first gear shaft 72 passing through the case plate 13 runs through the center of the planetary gear 82, and the planetary gear 82 is rotatably mounted on the first gear shaft 72 through a bearing.

When the equipment is working, assuming that the pneumatic power source drives the power gear 32 to rotate counterclockwise, it can drive the first double gear to rotate clockwise, and the first big wheel 42 further drives the second double gear to rotate counterclockwise, and the first small wheel 41 passes through The steering gear 62 then drives the fourth gear 61 to rotate clockwise. In terms of the transmission gear set, the second double gear drives the first gear 71 to rotate clockwise, and under the action of the first key 73 and the second gear 74, the third gear 23 keeps rotating counterclockwise, thereby driving the tool 2 to rotate counterclockwise at high speed. In terms of the revolution radius self-adjusting mechanism, the central shaft 6 rotates clockwise under the action of the fourth gear 61 and the second key 64, and then drives the central gear 81 to rotate clockwise, and the three planetary gears 82 rotate counterclockwise under the action of the central gear 81 , the distance between the corresponding self-aligning bearing 24 and the center of the inner hole to be processed changes accordingly, or approaches the center of the circle or deviates from the center of the circle at the same time, and the two processes appear alternately. When processing the inner hole, lower the height of the equipment first, so that the self-aligning bearings 24 at the lower ends of the three cutter shafts 21 all enter the inner holes to be processed. When reaching the edge of the inner hole, the pressure on the edge of the inner hole can automatically align the center of the inner hole of the workpiece with the center of the tool 2 revolution, and further reduce the height of the equipment after the centering is completed. Restricted, the planetary gear 82 will no longer rotate relative to the central gear 81 , and at this time, the center of the revolution of the tool 2 is located on the axis of the central shaft 6 . The central gear 81 drives the entire case plate 13 and the fixed plate 14 to rotate clockwise around the central shaft 6 through the first gear shaft 72 passing through the centers of the three planetary gears 82 , and the corresponding tool 2 revolves around the axis of the central shaft 6 . The descending tool 2 is in the process of non-stop rotation, and it cuts the edge of the inner hole to realize the rapid processing of the round chamfering of the inner hole. When processing the round chamfering of the workpiece section, the height of the equipment can also be lowered first, so that the self-aligning bearings 24 at the lower ends of the three knife rotating shafts 21 are distributed around the workpiece section. As the distance between the self-aligning bearings 24 and the center of the circle becomes smaller, when When the self-aligning bearing 24 clamps the end face of the workpiece, the pressure on the end face of the workpiece can automatically align the center of the end face of the workpiece with the center of the revolution of the tool 2. After the centering is completed, the height of the equipment is further reduced to realize the rapid processing of the rounded corners of the workpiece section.

The above processing method can be summarized into the following steps:

Step 1: Install the central gear and multiple planetary gears distributed on the periphery of the central gear on the chamfering processing equipment. The central gear meshes with all the planetary gears, and a knife shaft can be rotatably inserted in the non-gear center of the planetary gear and kept The distance from all the cutter shafts to the center of the central gear is equal at all times, and the cutter is fixed on one or more cutter shafts and rotates with the cutter shaft;

Step 2: Place all the cutter shafts in the inner hole to be processed, and change the distance synchronously to realize the automatic alignment between the center of the central gear and the center of the inner hole to be processed;

Step 3: While the tool is spinning, it revolves around the center of the inner hole to be processed along with the tool axis to complete the chamfering of the inner hole.

In order to realize multiple applications of the power source, the rotating shaft of the cutter in step 1 spins, the center of the central gear and the center of the inner hole to be processed are automatically centered in step 2, and the rotating shaft of the cutter revolves around the center of the inner hole to be processed in step 3, all through Synchronous control of the same power source is realized.

Furthermore, the equipment can also be combined with the circumference recognition sensor to monitor the processing process. When the monitoring of the round chamfering of the workpiece port or the inner hole is completed, the equipment will automatically exit; the equipment can also cooperate with the automatic refueling mechanism on the market to form a complete The automated chamfering processing line not only improves efficiency, but also ensures personnel safety, thereby contributing to the construction of Industry 4.0.

Embodiment two:

Further, in order to avoid changing the revolution radius of the tool due to the pressure of the workpiece or the edge of the inner hole on the tool when the tool is lowered, a ratchet mechanism can be provided between the box plate and the fixed plate, and the clockwise rotation of the planetary gear 82 relative to the central gear 81 can be prevented by the ratchet mechanism. Realize the locking of tool revolution radius.

Specifically, the other structures of the equipment are the same as in Embodiment 1, except that any planetary gear 82 is selected to set up a ratchet mechanism, as shown in Figure 8, in order to ensure a reasonable distribution of space in the case, the first gear is selected in this embodiment 71 does not pass through the planetary gear 82, a ratchet 91 is fixed at the upper end of any fixed column 15 of the planetary gear, and a ratchet 92 is fixed at the upper end of the first gear shaft 72, and the ratchet 91 leans against the ratchet 92 to avoid the relative center of the planetary gear 82 Gear 81 moves clockwise.

In order to ensure the accuracy of chamfering, it is necessary to improve the accuracy of the ratchet mechanism used to lock the planetary gear. On the one hand, it can be achieved by reducing the size of the ratchet teeth, and on the other hand, it can also meet the accuracy requirements by setting multiple pawls. As shown in Figure 10, three ratchets 91 can be installed on the three fixed columns 15 of the same planetary gear at the same time, so that they can be close to the edge of the ratchet 92 at different angles, and the three ratchets 91 will not block the ratchet 92 at the same time. Ratchet, when any one ratchet 91 blocks the ratchet, the other two ratchets 91 will not block the ratchet. When the ratchet wheel 92 rotates through a ratchet angle, the three ratchets 91 will play the role of blocking the ratchet successively.

Embodiment three:

The difference between the present embodiment and the second embodiment is only the position distribution of the ratchet. As shown in FIG. Rotate synchronously with case dish, ratchet 91 also can be selected to be fixedly installed on case dish bottom surface. The pawl 91 can be installed in the gap on one side of the meshing part of the planetary gear 82. The pawl 91 can rotate around its installation shaft and reset by the coil spring or spring sleeved on the installation shaft. The claw tip of the pawl 91 is inserted at an acute angle. In the teeth of the planetary gear 82, when the planetary gear 82 moves counterclockwise relative to the wheel box under the drive of the central gear 81, the pawl 91 can rotate under the action of the gear teeth without affecting the progress of the planetary gear. When the alignment is in place, The pawl 91 can be quickly reset under the action of the coil spring or the spring, and leans against the teeth of the planetary gear again, so as to prevent the clockwise movement of the planetary gear 82 relative to the central gear 81 .

The above is only a preferred embodiment of the present invention, and does not limit the technical scope of the present invention in any way, so any changes or modifications made according to the claims of the present invention and the description should all be covered by the patent of the present invention. within range.

Claims (7)

1. A self-aligning chamfering processing equipment, comprising a body, a power source, a cutter and a transmission gear set, characterized in that the cutter is fixedly mounted on one end of a cutter shaft, and the cutter shaft can be rotatably mounted on On the transmission gear set, the transmission gear set is assembled in the body, the cutter shaft and the cutter can revolve around the inner hole to be processed or the center of the workpiece end face with a variable revolution radius, and the power source passes through the transmission The gear set drives the cutter shaft and the cutter to rotate at high speed; The body includes a box cover with an opening downward, a box plate is arranged inside the box cover, and a positioning ring is covered under the box cover; The power source is connected to one end of the power shaft, and the other end of the power shaft is fixedly connected to the power gear, and the power gear is connected to the first double gear, and the first double gear is composed of a coaxially superimposed first large wheel Composed of the first small wheel, the first large wheel meshes with the power gear; the second double gear is also arranged in the box plate, and the second double gear is coaxially stacked by the second large The first large wheel and the second small wheel mesh with each other; the second large wheel meshes with the first gear and drives the first gear shaft to rotate, and the first gear is fixed At one end of the first gear shaft, a second gear is fixed in the middle section of the first gear shaft through a first key; a third gear is also installed on the cutter shaft, and the third gear and the cutter are respectively fixed on The two ends of the cutter shaft, the second gear and the third gear mesh with each other, and the third gear drives the cutter shaft and the cutter to rotate. The power gear, the first large wheel, the second The two double gears, the first gear, the second gear and the third gear together constitute the transmission gear set; It also includes a revolution radius self-adjusting mechanism, the revolution radius self-adjustment mechanism includes a sun gear and planetary gears distributed on the periphery of the sun gear, the sun gear meshes with all the planetary gears, and the planetary gears are distributed at the center of the non-gear There is a cutter shaft hole that runs through the upper and lower planes of the gear. The cutter shaft can spin through the cutter shaft hole. A self-aligning bearing is arranged under the cutter, and the other end of the first gear shaft that runs through the box plate runs through the the center of the planetary gear. 2. A self-aligning chamfering processing equipment according to claim 1, characterized in that: said power source is simultaneously connected and drives said revolution radius self-adjusting mechanism to automatically adjust said knife shaft and said knife revolution radius. 3. A kind of self-aligning chamfering processing equipment according to claim 1, characterized in that: three identical planetary gears are distributed on the periphery of the central gear, and one end of the central rotating shaft passes through the central gear and drives the central gear. The gear rotates, and the other end of the central shaft is fixedly connected with a fourth gear, a steering gear is arranged between the fourth gear and the first small wheel, and the first double gear is fixed on the second gear shaft , the steering gear is fixed on the steering gear shaft, and the power shaft, the second gear shaft and the steering gear shaft are movably connected to the inner surface of the case cover through bearings. 4. The self-aligning chamfering processing equipment according to claim 1, characterized in that: handles are symmetrically distributed on the outside of the side wall of the box cover. 5. The self-aligning chamfering processing equipment according to claim 1, characterized in that: a ratchet structure is arranged between the planetary gear and the box plate. 6. An automatic centering chamfering processing method, which comprises the following steps: Step 1: Install the central gear and a plurality of planetary gears distributed on the periphery of the central gear on the chamfering processing equipment, the central gear meshes with all the planetary gears, and can be rotatably inserted at the non-gear center of the planetary gears There is a knife shaft, and the distance from all the knife shafts to the center of the central gear is kept equal at all times, and a tool is fixed on one or more of the knife shafts and rotates with the knife shaft; Step 2: Place all the cutter shafts in the inner hole to be processed, and change the distance synchronously to realize automatic centering between the center of the central gear and the center of the inner hole to be processed; Step 3: While the tool is spinning, it revolves around the center of the inner hole to be processed along with the tool axis to complete the chamfering of the inner hole. 7. A kind of automatic centering chamfering processing method according to claim 6, characterized in that: in the first step, the rotating shaft of the knife rotates, and in the second step, the center of the central gear and the center of the inner hole to be processed automatically The centering and the revolution of the tool rotating shaft around the center of the inner hole to be processed in the step 3 are realized through the synchronous control of the same power source.

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