CN114290221A

CN114290221A - Automatic numerical control machine tool that polishes of reducing axle class work piece

Info

Publication number: CN114290221A
Application number: CN202111467867.4A
Authority: CN
Inventors: 劳水养
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-03
Filing date: 2021-12-03
Publication date: 2022-04-08

Abstract

The invention discloses an automatic polishing numerical control machine tool for reducing shaft workpieces, which comprises a support, wherein the top end of the support is fixedly connected with a processing table, one side of the upper end of the processing table is fixedly provided with a fixed frame, the other side of the upper end of the processing table is slidably clamped with a movable frame, the fixed frame is provided with a fixed mechanism on the movable frame, and two sides of the processing table are fixedly provided with symmetrically distributed slide rails; under electric telescopic handle's drive, can make six sets of dead levers in step to the diffusion of the inner chamber outside of fixed disc, thereby drive six sets of arc-shaped rubber pads in step to the diffusion of the inner chamber outside of fixed disc, close two sets of electric telescopic handle in proper order when the outer wall that corresponds six sets of arc-shaped rubber pads closely laminates on the inner chamber lateral wall at the cylindric reducing axle class work piece both ends of class of waiting to process respectively in proper order, thereby for waiting to process the fixed of the cylindric reducing axle class work piece of class and provide convenience, and the later stage of being convenient for is dismantled, this fixed establishment simple structure, and reasonable in design, convenient to use person operates.

Description

Automatic numerical control machine tool that polishes of reducing axle class work piece

Technical Field

The invention relates to the technical field of polishing of reducing shaft workpieces, in particular to an automatic polishing numerical control machine tool for the reducing shaft workpieces.

Background

The workpiece refers to a processing object in a machining process. It can be a single part or a combination of several parts secured together. The processing modes of the workpiece are various, and include turning, milling, planing, grinding, casting, forging and the like. The machining process of the workpiece also varies with the machining method.

The automatic numerical control machine tool that polishes of reducing axle class work piece that present class cylindric reducing axle class work piece polishing used still has certain not enough, do not set up the fixed establishment who uses with the cooperation of class cylindric reducing axle class work piece in the automatic numerical control machine tool that polishes of present reducing axle class work piece, thereby it is not convenient for fixed to lead to class cylindric reducing axle class work piece, and the automatic numerical control machine tool that polishes of present reducing axle class work piece is when using, the inner wall that can't ensure to polish the piece is closely laminated with the outer wall of waiting to process class cylindric reducing axle class work piece all the time, thereby can't ensure the normal of the polishing operation of class cylindric reducing axle class work piece and develop, for this we propose a reducing axle class work piece automatic polishing numerical control machine tool and are used for solving above-mentioned problem.

Disclosure of Invention

The invention aims to provide an automatic polishing numerical control machine tool for reducing shaft workpieces, and aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an automatic polishing digit control machine tool of reducing axle type work piece, includes the support, the top fixedly connected with processing platform of support, upper end one side fixed mounting of processing platform has the mount, the upper end opposite side slide card of processing platform is equipped with removes the frame, the mount has all to be equipped with fixed establishment on removing the frame, the both sides fixed mounting of processing platform has the slide rail of symmetric distribution, it has cup jointed the slider, two sets of to slide on the slide rail the upper end of slider is equipped with polishes the mechanism, be equipped with the riser of mirror image distribution between support and the processing platform, two sets of be equipped with on riser and the slider with polish the reciprocating mechanism that the mechanism cooperation was used, the support is equipped with the actuating mechanism who uses with reciprocating mechanism and fixed establishment cooperation.

As a preferred technical scheme of the invention, a first air cylinder is fixedly mounted on one side of the bottom end of the processing table, a U-shaped push block is arranged at the output end of the first air cylinder, a through groove matched with the U-shaped push block is formed in one end of the processing table in a penetrating manner, one end of the U-shaped push block is slidably clamped in the through groove, and the top end of the U-shaped push block penetrates through the through groove and is fixedly connected with the movable frame.

As a preferred technical scheme of the invention, the fixing mechanism comprises a rotating shaft, one end of the rotating shaft is respectively and rotatably inserted on the fixed frame and the movable frame, and the other end of the rotating shaft is fixedly provided with a fixed disc, the middle part of the inner cavity of the fixed disc is rotatably provided with a first gear, the first gear is provided with arc-shaped grooves which are distributed in an array mode in a penetrating mode, the outer side of the first gear is meshed with a rack, the rack is clamped in an inner cavity of the fixed disc in a sliding mode, one end of the rack is fixedly connected with an electric telescopic rod which is fixedly arranged in the inner cavity of the fixed disc, the side wall of one side of the inner cavity of the fixed disc is provided with fixed rods in an array distribution in a sliding clamping way, one end of each fixed rod is provided with a driving column, the driving column is movably clamped in the arc-shaped groove, and the other end of the fixed rod is provided with an arc-shaped rubber pad which can be clamped on the fixed disc in a sliding manner.

As a preferred technical scheme, the polishing mechanism comprises a U-shaped frame, two sides of the bottom end of the U-shaped frame are fixedly connected with two groups of sliding blocks respectively, a second air cylinder is fixedly installed in the middle of the top end of the U-shaped frame, the output end of the second air cylinder penetrates through the U-shaped frame, a transverse plate is arranged at the tail end of the second air cylinder, the transverse plate is slidably clamped on the inner side of the U-shaped frame, two groups of vertical rods are slidably inserted into the transverse plate, a limiting disc is arranged at one end of each vertical rod, one side of the limiting disc can be in contact with the transverse plate, a polishing piece is fixedly installed at one end of each vertical rod, a spring is movably sleeved on the outer side of each vertical rod, and two ends of the spring are fixedly connected with the polishing piece and the transverse plate respectively.

As a preferred technical scheme of the invention, the reciprocating mechanism comprises a first rotating rod and a second rotating rod, the first rotating rod is rotatably inserted on two sets of vertical plates, rotating discs distributed in a mirror image manner are arranged at two ends of the first rotating rod, a third rotating rod is arranged on one side of each rotating disc, a first guide block is rotatably sleeved on the outer side of one end of each third rotating rod, a profiling frame is slidably sleeved on the outer side of each first guide block, one end of each profiling frame is rotatably connected with a sliding block, one end of each second rotating rod is rotatably connected with the corresponding vertical plate, a second guide block is rotatably sleeved on the other end of each second rotating rod, and the second guide block is slidably inserted in the profiling frame.

As a preferred technical scheme of the invention, the driving mechanism comprises a motor, the motor is fixedly mounted on the support, the output end of the motor is provided with a driving shaft, the driving shaft is rotatably mounted on the support, one end of the driving shaft is provided with a first wheel disc, a group of rotating shafts are fixedly sleeved with a second wheel disc, and the outer sides of the second wheel disc and the first wheel disc are movably sleeved with a first belt.

As a preferred technical scheme of the invention, the driving mechanism further comprises a fourth rotating rod, one end of the fourth rotating rod is rotatably connected with the vertical plate, a third wheel disc is fixedly sleeved on the fourth rotating rod, a fourth wheel disc matched with the third wheel disc for use is fixedly sleeved on the first rotating rod, a second belt is movably sleeved on the outer sides of the fourth wheel disc and the third wheel disc, a second gear is arranged at one end of the fourth rotating rod, a side gear matched with the second gear for use is fixedly sleeved on the driving shaft, and the side gear is meshed with the second gear.

Compared with the prior art, the invention has the beneficial effects that:

1. when the electric expansion type cylindrical reducing shaft machining device is used daily, a user can hold a cylindrical reducing shaft workpiece to be machined and sleeve one end of the cylindrical reducing shaft workpiece to be machined outside a fixed disc arranged on a fixed frame, then the user can open a first air cylinder, the movable frame is pulled to move to one side close to the fixed frame through a U-shaped push block, the fixed disc arranged on the movable frame is inserted into an inner cavity at the other end of the cylindrical reducing shaft workpiece to be machined, then the user can simultaneously open two groups of electric expansion rods, the movable frame pushes a rack to move to one side far away from the electric expansion rods, the first gear is driven to rotate, an arc-shaped groove synchronously rotates along with the first gear and is matched with a driving column, six groups of fixed rods can synchronously diffuse to the outer side of the inner cavity of the fixed disc, the six groups of arc-shaped rubber pads are driven to synchronously diffuse to the outer side of the inner cavity of the fixed disc, and the outer walls of the six groups of arc-shaped rubber pads are sequentially and tightly attached to the cylindrical reducing shaft workpiece to be machined respectively Two sets of electric telescopic handle are closed in proper order on the inner chamber lateral wall at a both ends to for waiting to process the fixed of the cylindric reducing axle type work piece of class and provide convenience, and the later stage of being convenient for is dismantled, this fixed establishment simple structure, reasonable in design, convenient to use person operates.

2. After the cylindrical reducing shaft workpieces to be processed are fixed, the second cylinder can be opened by a user, so that the second cylinder is pushed to move downwards, the polishing piece is driven to move downwards through the vertical rod, the second cylinder is continuously driven when the inner side of the polishing piece is attached to the cylindrical reducing shaft workpieces to be processed, the transverse plate moves towards one side of the polishing piece, the spring is extruded, the second cylinder is closed until the spring is compressed to a proper compression ratio, and therefore when the polishing mechanism moves subsequently, the inner wall of the polishing piece can be always attached to the outer wall of the cylindrical reducing shaft workpieces to be processed through the elastic action of the spring, and therefore guarantee is provided for normal development of polishing operation of the cylindrical reducing shaft workpieces.

3. When the polishing mechanism is adjusted to a proper position, a user can turn on the motor, the motor drives the first wheel disc and the side gear to rotate through the driving shaft, so as to drive the second wheel disc to rotate through the first belt, further drive the corresponding fixed disc to rotate through one group of rotating shafts, and drive the cylindrical reducing shaft workpiece to be processed to rotate through the other group of rotating shafts and the fixed disc, meanwhile, the side gear can drive the fourth rotating rod to rotate through the second gear, so as to drive the third wheel disc to rotate, further drive the fourth wheel disc to rotate through the second belt, at the moment, the first rotating rod synchronously rotates along with the fourth wheel disc, so as to drive the third rotating rod to rotate through the rotating disc, further drive the first guide block to rotate, and drive the shaping frame to cyclically and cyclically rotate in cooperation with the second rotating rod and the second guide block, so as to drive the polishing mechanism to cyclically and cyclically move through the sliding block, and then the polishing piece can be contacted with the outer wall of the cylindrical reducing shaft workpiece to be processed, so that the normal development of the polishing operation of the cylindrical reducing shaft workpiece to be processed is further ensured.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is another schematic structural view of the present invention;

FIG. 3 is a schematic bottom view of the present invention;

FIG. 4 is an enlarged structural view of the structure at A in FIG. 3 according to the present invention;

FIG. 5 is an enlarged structural view of the structure at B in FIG. 3 according to the present invention;

FIG. 6 is a schematic view of a part of the structure of the present invention;

FIG. 7 is an enlarged structural view of the structure at C in FIG. 6 according to the present invention;

FIG. 8 is an enlarged structural view of the structure shown at D in FIG. 6 according to the present invention;

fig. 9 is a schematic structural view of the fixing mechanism of the present invention.

In the figure: 1. a support; 11. a vertical plate; 2. a processing table; 21. a slide rail; 22. a slider; 23. a through groove; 3. a fixed mount; 4. a movable frame; 41. a first cylinder; 42. a U-shaped push block; 5. a fixing mechanism; 51. a rotating shaft; 52. fixing the disc; 53. a first gear; 54. an arc-shaped groove; 55. a rack; 56. an electric telescopic rod; 57. fixing the rod; 58. a drive column; 59. an arc-shaped rubber pad; 6. a polishing mechanism; 61. a U-shaped frame; 62. a second cylinder; 63. a transverse plate; 64. a vertical rod; 65. a limiting disc; 66. a polishing member; 67. a spring; 7. a reciprocating mechanism; 71. a first rotating lever; 72. a second rotating rod; 73. rotating the disc; 74. a third rotating rod; 75. a first guide block; 76. a back-shaped frame; 77. a second guide block; 8. a drive mechanism; 81. a motor; 82. a drive shaft; 83. a first wheel disc; 84. a second wheel disc; 85. a first belt; 86. a fourth rotating rod; 87. a third wheel disc; 88. a fourth wheel disc; 89. a second belt; 810. a second gear; 811. side gears.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-9, the present invention provides a technical solution: a numerical control machine tool for automatically polishing reducing shaft workpieces comprises a support 1, a processing table 2 is fixedly connected to the top end of the support 1, a fixed frame 3 is fixedly mounted on one side of the upper end of the processing table 2, a moving frame 4 is slidably clamped on the other side of the upper end of the processing table 2, a fixing mechanism 5 is arranged on each fixed frame 3 and each moving frame 4, symmetrically distributed slide rails 21 are fixedly mounted on two sides of the processing table 2, slide blocks 22 are slidably sleeved on the slide rails 21, limiting plates are arranged at two ends of each slide rail 21, one side of each slide block 22 can be in contact with the corresponding limiting plate, thereby play limiting displacement to slider 22, the upper end of two sets of sliders 22 is equipped with polishing mechanism 6, is equipped with the riser 11 of mirror image distribution between support 1 and the processing platform 2, is equipped with reciprocating mechanism 7 with polishing mechanism 6 cooperation use on two sets of risers 11 and the slider 22, and support 1 is equipped with actuating mechanism 8 with reciprocating mechanism 7 and the cooperation of fixed establishment 5 use.

Processing platform 2's bottom one side fixed mounting has first cylinder 41, and the output of first cylinder 41 is equipped with U type ejector pad 42, and processing platform 2's one end is run through and is offered the logical groove 23 that uses with the cooperation of U type ejector pad 42, and the slip card of the one end of U type ejector pad 42 is established in leading to the groove 23, and the top of U type ejector pad 42 run through logical groove 23 and with removal frame 4 fixed connection to can promote removal frame 4 through first cylinder 41 and remove.

The fixing mechanism 5 includes a rotating shaft 51, one end of the rotating shaft 51 is rotatably inserted into the fixed frame 3 and the moving frame 4, the other end of the rotating shaft 51 is fixedly installed with a fixed disc 52, the middle part of the inner cavity of the fixed disc 52 is rotatably installed with a first gear 53, the first gear 53 is provided with arc-shaped grooves 54 distributed in an array manner in a penetrating manner, the outer side of the first gear 53 is engaged with a rack 55, the rack 55 is slidably clamped in the inner cavity of the fixed disc 52, one end of the rack 55 is fixedly connected with an electric telescopic rod 56, the electric telescopic rod 56 is fixedly installed in the inner cavity of the fixed disc 52, a storage battery used in cooperation with the electric telescopic rod 56 is arranged in the inner cavity of the fixed disc 52, and the storage battery can be charged outside the fixed disc 52, which is prior art and will not be described herein, fixing rods 57 distributed in an array manner are slidably clamped on the side wall of the inner cavity of the fixed disc 52, one end of the fixing rod 57 is provided with a driving column 58, the driving column 58 is movably clamped in the arc-shaped groove 54, the other end of the fixing rod 57 is provided with an arc-shaped rubber pad 59, and the arc-shaped rubber pad 59 can be clamped on the fixing disc 52 in a sliding mode.

Polishing mechanism 6 includes U type frame 61, the bottom both sides of U type frame 61 respectively with two sets of sliders 22 fixed connection, and the top middle part fixed mounting of U type frame 61 has second cylinder 62, the output of second cylinder 62 runs through U type frame 61 and is equipped with diaphragm 63 at its end, diaphragm 63 slide card is established in the inboard of U type frame 61, and sliding insertion is equipped with two sets of montants 64 on diaphragm 63, the one end of montant 64 is equipped with spacing dish 65, one side of spacing dish 65 can contact with diaphragm 63, the one end fixed mounting of two sets of montants 64 has polishing piece 66, polishing piece 66 can polish with the class cylindric reducing axle class piece of treating processing, this is prior art, do not do too much repeated here, the outside activity cover of montant 64 is equipped with spring 67, the both ends of spring 67 respectively with polishing piece 66 and diaphragm 63 fixed connection.

The reciprocating mechanism 7 comprises a first rotating rod 71 and a second rotating rod 72, the first rotating rod 71 is rotatably inserted in two sets of vertical plates 11, rotating discs 73 distributed in a mirror image mode are arranged at two ends of the first rotating rod 71, a third rotating rod 74 is arranged on one side of each rotating disc 73, a first guide block 75 is rotatably sleeved on the outer side of one end of each third rotating rod 74, a shaping frame 76 is slidably sleeved on the outer side of each first guide block 75, one end of each shaping frame 76 is rotatably connected with the sliding block 22, one end of each second rotating rod 72 is rotatably connected with the corresponding vertical plate 11, a second guide block 77 is rotatably sleeved on the other end of each second rotating rod 72, and the second guide block 77 is slidably inserted in the shaping frame 76.

The driving mechanism 8 comprises a motor 81, and in the scheme: the preferred Y80M1-2 model of motor 81, the power supply interface of motor passes through the switch and connects power supply system, motor 81 operation circuit is regular reverse control program of conventional motor 81, the circuit operation is current conventional circuit, the circuit and the control that relate to in this scheme are prior art, do not excessively describe here, motor 81 fixed mounting is on support 1, and the output of motor 81 is equipped with drive shaft 82, drive shaft 82 rotates and installs on support 1, and the one end of drive shaft 82 is equipped with first rim plate 83, the fixed cover of a set of pivot 51 has been cup jointed second rim plate 84, the outside movable sleeve of second rim plate 84 and first rim plate 83 is equipped with first belt 85.

The driving mechanism 8 further comprises a fourth rotating rod 86, one end of the fourth rotating rod 86 is rotatably connected with the vertical plate 11, a third wheel disc 87 is fixedly sleeved on the fourth rotating rod 86, a fourth wheel disc 88 matched with the third wheel disc 87 for use is fixedly sleeved on the first rotating rod 71, a second belt 89 is movably sleeved on the outer sides of the fourth wheel disc 88 and the third wheel disc 87, a second gear 810 is arranged at one end of the fourth rotating rod 86, a side gear 811 matched with the second gear 810 for use is fixedly sleeved on the driving shaft 82, the side gear 811 is meshed with the second gear 810, and therefore the driving shaft 82 and the fourth rotating rod 86 can be synchronously rotated through matching of the side gear 811 and the second gear 810.

The working principle is as follows: when the invention is used in daily life, a user can hold a cylindrical reducing shaft workpiece to be processed by hand and sleeve one end of the cylindrical reducing shaft workpiece to be processed at the outer side of the fixed disc 52 arranged on the fixed frame 3, then the user can open the first air cylinder 41, so that the user can pull the movable frame 4 to move towards one side close to the fixed frame 3 through the U-shaped push block 42 until the fixed disc 52 arranged on the movable frame 4 is inserted into the inner cavity at the other end of the cylindrical reducing shaft workpiece to be processed, and then the user can simultaneously open the two groups of electric telescopic rods 56, so that the user can push the rack 55 to move towards one side far away from the electric telescopic rods 56, further drive the first gear 53 to rotate, and the arc-shaped grooves 54 synchronously rotate along with the first gear 53 and can synchronously diffuse the six groups of fixed rods 57 towards the outer side of the inner cavity of the fixed disc 52 by matching with the use of the driving column 58, so as to drive the six groups of arc-shaped rubber pads 59 to synchronously diffuse towards the outer side of the inner cavity of the fixed disc 52, the fixing mechanism 5 has a simple structure and reasonable design, and is convenient for a user to operate, when the fixing of the cylindrical reducing shaft type workpiece to be processed is completed, the user can open the second cylinder 62 so as to push the transverse plate 63 to move downwards, further drive the polishing piece 66 to move downwards through the vertical rod 64, when the inner side of the polishing piece 66 is attached to the cylindrical reducing shaft type workpiece to be processed, the second cylinder 62 is continuously driven, at the moment, the transverse plate 63 moves towards one side of the polishing piece 66, so as to extrude the spring 67, and the second cylinder 62 is closed until the spring 67 is compressed to a proper compression ratio, when the polishing mechanism 6 is adjusted to a proper position, a user can turn on the motor 81, the motor 81 drives the first wheel disc 83 and the side gear 811 to rotate through the driving shaft 82, so as to drive the second wheel disc 84 to rotate through the first belt 85, further drive the corresponding fixed disc 52 to rotate through one group of the rotating shafts 51, and drive the cylindrical reducing shaft-like workpiece to be processed to rotate by matching with the other group of the rotating shafts 51 and the fixed disc 52, meanwhile, the side gear 811 can drive the fourth rotating rod 86 to rotate through the second gear 810, thereby driving the third wheel disc 87 to rotate, further drive the fourth wheel disc 88 to rotate through the second belt 89, at this time, the first rotating rod 71 rotates synchronously with the fourth rotating disc 88, so that the third rotating rod 74 is driven to rotate through the rotating disc 73, the first guide block 75 is driven to rotate, the second rotating rod 72 and the second guide block 77 are matched to be used, the shaping frame 76 can be driven to rotate cyclically and reciprocally periodically, the polishing mechanism 6 is driven to move cyclically and reciprocally periodically through the sliding block 22, the polishing piece 66 can be in contact with the outer wall of the cylindrical reducing shaft workpiece to be processed, normal development of polishing operation of the cylindrical reducing shaft workpiece to be processed is further guaranteed, and after the cylindrical reducing shaft workpiece to be processed is polished, a user can take the cylindrical reducing shaft workpiece to be processed and replace a new cylindrical reducing shaft workpiece to be processed to perform subsequent polishing operation.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an automatic numerical control machine tool that polishes of reducing axle class work piece, includes support (1), its characterized in that: the top end of the bracket (1) is fixedly connected with a processing table (2), one side of the upper end of the processing table (2) is fixedly provided with a fixed frame (3), the other side of the upper end of the processing table (2) is slidably clamped with a movable frame (4), the fixed frame (3) is provided with a fixed mechanism (5) on the movable frame (4), slide rails (21) which are symmetrically distributed are fixedly arranged on two sides of the processing table (2), the slide rails (21) are sleeved with slide blocks (22) in a sliding manner, the upper ends of the two groups of slide blocks (22) are provided with polishing mechanisms (6), vertical plates (11) distributed in a mirror image manner are arranged between the bracket (1) and the processing table (2), reciprocating mechanisms (7) matched with the polishing mechanisms (6) for use are arranged on the two groups of vertical plates (11) and the sliding blocks (22), the support (1) is provided with a driving mechanism (8) which is matched with the reciprocating mechanism (7) and the fixing mechanism (5) for use.

2. The automatic polishing numerical control machine tool for the variable-diameter shaft workpieces as recited in claim 1, characterized in that: the utility model discloses a machining platform, including processing platform, U type ejector pad (42), one end of processing platform (2), and the top of U type ejector pad (42) is run through logical groove (23) of offering with U type ejector pad (42) cooperation use, the one end of processing platform (2) is run through to be established in logical groove (23), and the top of U type ejector pad (42) run through logical groove (23) and with remove frame (4) fixed connection.

3. The automatic polishing numerical control machine tool for the variable-diameter shaft workpieces as recited in claim 1, characterized in that: the fixing mechanism (5) comprises a rotating shaft (51), one end of the rotating shaft (51) is respectively rotated and inserted on the fixing frame (3) and the moving frame (4), the other end of the rotating shaft (51) is fixedly provided with a fixing disc (52), the middle part of the inner cavity of the fixing disc (52) is rotatably provided with a first gear (53), an arc-shaped groove (54) with array distribution is formed in the first gear (53) in a penetrating manner, a rack (55) is meshed with the outer side of the first gear (53), the rack (55) is slidably clamped in the inner cavity of the fixing disc (52), one end of the rack (55) is fixedly connected with an electric telescopic rod (56), the electric telescopic rod (56) is fixedly arranged in the inner cavity of the fixing disc (52), a fixing rod (57) with array distribution is slidably clamped on the side wall of the inner cavity of the fixing disc (52), one end of the fixing rod (57) is provided with a driving column (58), the driving column (58) is movably clamped in the arc-shaped groove (54), an arc-shaped rubber pad (59) is arranged at the other end of the fixing rod (57), and the arc-shaped rubber pad (59) can be clamped on the fixing disc (52) in a sliding mode.

4. The automatic polishing numerical control machine tool for the variable-diameter shaft workpieces as recited in claim 1, characterized in that: the polishing mechanism (6) comprises a U-shaped frame (61), two sides of the bottom end of the U-shaped frame (61) are respectively fixedly connected with two groups of sliding blocks (22), a second cylinder (62) is fixedly arranged in the middle of the top end of the U-shaped frame (61), the output end of the second cylinder (62) penetrates through the U-shaped frame (61) and is provided with a transverse plate (63) at the tail end thereof, the transverse plate (63) is slidably clamped on the inner side of the U-shaped frame (61), two groups of vertical rods (64) are slidably inserted into the transverse plate (63), one end of each vertical rod (64) is provided with a limiting disc (65), one side of the limiting disc (65) can be contacted with the transverse plate (63), one end of each of the two groups of vertical rods (64) is fixedly provided with a polishing piece (66), the outside activity cover of montant (64) is equipped with spring (67), the both ends of spring (67) respectively with polishing piece (66) and diaphragm (63) fixed connection.

5. The automatic polishing numerical control machine tool for the variable-diameter shaft workpieces as claimed in claim 3, characterized in that: reciprocating mechanism (7) include first bull stick (71) and second bull stick (72), first bull stick (71) are rotated and are inserted and establish on two sets of risers (11), and the both ends of first bull stick (71) are equipped with rotating disc (73) that the mirror image distributes, one side of rotating disc (73) is equipped with third bull stick (74), the one end outside of third bull stick (74) is rotated and is cup jointed first guide block (75), the outside slip of first guide block (75) has cup jointed back type frame (76), the one end and the slider (22) of back type frame (76) rotate and are connected, the one end and riser (11) of second bull stick (72) are rotated and are connected, and the other end of second bull stick (72) is rotated the cover and is equipped with second guide block (77), second guide block (77) slip is inserted and is established in back type frame (76).

6. The automatic polishing numerical control machine tool for the variable-diameter shaft workpieces as claimed in claim 5, is characterized in that: actuating mechanism (8) include motor (81), motor (81) fixed mounting is on support (1), and the output of motor (81) is equipped with drive shaft (82), drive shaft (82) rotate to be installed on support (1), and the one end of drive shaft (82) is equipped with first rim plate (83), and is a set of fixed cover has connect second rim plate (84) in pivot (51), second rim plate (84) are equipped with first belt (85) with the outside activity cover of first rim plate (83).

7. The automatic polishing numerical control machine tool for the variable-diameter shaft workpieces as claimed in claim 6, is characterized in that: actuating mechanism (8) still include fourth bull stick (86), the one end and riser (11) of fourth bull stick (86) are rotated and are connected, and fixed cover is equipped with third rim plate (87) on fourth bull stick (86), fixed cover is gone up in first bull stick (71) has connect fourth rim plate (88) that uses with third rim plate (87) cooperation, fourth rim plate (88) and the outside activity cover of third rim plate (87) are equipped with second belt (89), the one end of fourth bull stick (86) is equipped with second gear (810), fixed side gear (811) that use with second gear (810) cooperation of cup jointing on drive shaft (82), side gear (811) and second gear (810) mesh mutually.