CN216370333U

CN216370333U - Horizontal milling machine for machining locking nut

Info

Publication number: CN216370333U
Application number: CN202123123509.XU
Authority: CN
Inventors: 刘名扬
Original assignee: Fengyuan Haochen Baoding Precision Machinery Co ltd
Current assignee: Fengyuan Haochen Baoding Precision Machinery Co ltd
Priority date: 2021-12-13
Filing date: 2021-12-13
Publication date: 2022-04-26
Anticipated expiration: 2031-12-13

Abstract

The utility model discloses a horizontal milling machine for machining a locking nut, which comprises a machine body, a workbench, a working part and a clamp assembly, wherein the workbench is arranged on the machine body; the clamp assembly is detachably connected to the top surface of the workbench and used for clamping the nut blank; the clamp assembly comprises a clamp base, a clamping part is arranged on the clamp base, and the nut blank is clamped on the clamping part; and a positioning assembly is arranged between the clamping part and the clamp base and is used for rotating the clamp assembly at a fixed angle. The utility model has the advantages of simple structure, convenient operation, accurate positioning, consistent depth of milled anti-loosening grooves, uniform distribution of anti-loosening grooves outside each locking nut finished product, and great improvement on the processing efficiency of the anti-loosening grooves of the locking nuts and the yield of the locking nuts.

Description

Horizontal milling machine for machining locking nut

Technical Field

The utility model relates to the technical field of machining, in particular to a horizontal milling machine for machining a locking nut.

Background

The locknut is a nut widely applied to industries such as machinery, the locknut has the working principle that self-locking is carried out by adopting the friction force between the nut and a bolt, is a nut which is arranged on a rotating part such as a main shaft rotating at a high speed and is positioned and fixed, and is provided with a locking mechanism, so that even if a gap is generated between the locknut and a fastening surface due to vibration and impact, looseness does not occur; according to different materials, the material can be divided into carbon steel, stainless steel, nonferrous metal (such as copper) and the like. The outer wall of the locking nut is provided with an anti-loosening groove, so that the locking nut is prevented from being loosened by vibration or impact rotation.

The anti-loosening grooves of the existing locking nut are milled by a milling machine, but the existing milling machine needs to be manually turned after clamping the blank of the locking nut; however, manual turning easily causes uneven distribution of milled anti-loosening grooves, so that a horizontal milling machine for machining the lock nut is needed to solve the problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a horizontal milling machine for machining a locking nut, which aims to solve the problems in the prior art.

In order to achieve the purpose, the utility model provides the following scheme: the utility model provides a horizontal milling machine for processing a locking nut, which comprises

The lathe bed is used as the basis of the milling machine;

the workbench is arranged on the top surface of the lathe bed and used for fixing parts for machining;

the working part is arranged on the top surface of the lathe bed and is used for milling;

the clamp assembly is detachably connected to the top surface of the workbench and used for clamping the nut blank; the clamp assembly comprises a clamp base, a clamping part is arranged on the clamp base, and the nut blank is clamped on the clamping part; and a positioning assembly is arranged between the clamping part and the clamp base and is used for rotating the clamp assembly at a fixed angle.

Preferably, the clamp base comprises a base detachably connected with the top surface of the workbench, two vertical plates are symmetrically arranged at two ends of the top surface of the base, and the clamping part is rotatably connected between the two vertical plates; the positioning assembly is arranged in one vertical plate.

Preferably, the clamping part comprises an inserting rod and a sleeve which are correspondingly arranged, the inserting rod and the sleeve are respectively and rotatably connected with opposite surfaces of the two vertical plates, the nut blank is sleeved on the inserting rod, and the sleeve abuts against the end surface of the nut blank; the positioning assembly is arranged in the vertical plate which is rotationally connected with the sleeve.

Preferably, the inserted bar include with the mounting panel that the riser rotated to be connected, the mounting panel orientation telescopic one end rigid coupling has electric putter, electric putter's output rigid coupling has the cone, a plurality of cracks have been seted up to cone circumference equidistant, the crack will a plurality of elastic blocks are cut apart into to the cone, the elastic block with the hole butt of nut blank.

Preferably, the inner cavity of the sleeve is provided with a top block, the top block is arranged corresponding to the split groove, and the top block is connected with the split groove in a sliding manner.

Preferably, the positioning assembly comprises a limiting device and an angle fixing device; the limiting device is arranged in the vertical plate, one end of the limiting device is detachably connected with the sleeve, and the other end of the limiting device extends out of the vertical plate; the angle fixing device is arranged between the vertical plate and the sleeve.

Preferably, the limiting device comprises a limiting rod, one end of the limiting rod is inserted into the sleeve, the other end of the limiting rod extends out of the vertical plate through a through hole and is fixedly connected with a knob, and the limiting rod is connected with the through hole in a sliding manner; a positioning plate is fixedly connected to the limiting rod and positioned in the vertical plate, and the diameter of the positioning plate is larger than that of the through hole; a return spring is fixedly connected between one end of the positioning plate facing the sleeve and the limiting rod, and the return spring is sleeved on the limiting rod; and a clamping column is vertically and fixedly connected to the limiting rod and is matched with a clamping hole formed in the through hole.

Preferably, the fixed angle device comprises fixed angle grooves which are circumferentially and equidistantly formed in the sleeve, fixed angle holes matched with the fixed angle grooves are formed in the vertical plate, fixed angle springs are fixedly connected into the fixed angle holes, clamping balls are fixedly connected to the tail ends of the fixed angle springs, and the clamping balls are matched with the fixed angle grooves.

The utility model discloses the following technical effects: the utility model discloses a horizontal milling machine for processing a lock nut.A clamping part firmly clamps a nut blank, then the nut blank is fixed on a workbench through a clamp assembly, and a required anti-loosening groove is milled by a working part, so that the clamping is convenient, the operation is simple, the nut blank is conveniently centered, and the depth of the milled anti-loosening groove is ensured to be consistent; the positioning assembly is used for rotating the nut blank by a fixed angle after the working part mills an anti-loosening groove, so that the anti-loosening grooves distributed outside the nut blank are uniformly distributed, and the nut blank is convenient to use. The utility model has the advantages of simple structure, convenient operation, accurate positioning, consistent depth of milled anti-loosening grooves, uniform distribution of anti-loosening grooves outside each locking nut finished product, and great improvement on the processing efficiency of the anti-loosening grooves of the locking nuts and the yield of the locking nuts.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a three-dimensional view of a horizontal milling machine for processing a lock nut according to the present invention;

FIG. 2 is a schematic structural view of the clamp assembly of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a partial enlarged view of B in FIG. 3;

FIG. 5 is an enlarged view of a portion C of FIG. 3;

FIG. 6 is a three-dimensional view of a clamping portion of the present invention;

FIG. 7 is a three-dimensional view of a spacing device of the present invention;

wherein, 1, a lathe bed; 2. a work table; 3. a working part; 4. a clamp assembly; 5. a clamp base; 6. a clamping part; 7. a positioning assembly; 8. a nut blank; 11. a control box; 31. a column; 32. a top plate; 33. a working motor; 34. milling cutters; 35. a height adjustment motor; 36. a first guide assembly; 37. a horizontal adjustment motor; 38. a second guide assembly; 51. a base; 52. A vertical plate; 61. inserting a rod; 62. a sleeve; 63. an electric push rod; 64. a conical head; 65. cracking the groove; 66. a top block; 67. a hand wheel with a fixed angle; 71. a limiting rod; 72. a through hole; 73. a knob; 74. Positioning a plate; 75. a return spring; 76. clamping the column; 77. a clamping hole; 78. a fixed angle groove; 79. A fixed angle hole; 710. a constant angle spring; 711. and (5) blocking the ball.

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.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Referring to fig. 1 to 7, the present invention provides a horizontal milling machine for processing a lock nut, comprising

The machine body 1 and the machine body 1 are used as the foundation of a milling machine;

the workbench 2 is arranged on the top surface of the lathe bed 1 and used for fixing a part to be machined;

the working part 3 is arranged on the top surface of the lathe bed 1, and the working part 3 is used for milling;

the clamp assembly 4 is detachably connected to the top surface of the workbench 2, and the clamp assembly 4 is used for clamping a nut blank 8; the clamp assembly 4 comprises a clamp base 5, a clamping part 6 is arranged on the clamp base 5, and a nut blank 8 is clamped on the clamping part 6; a positioning assembly 7 is arranged between the clamping part 6 and the clamp base 5, and the positioning assembly 7 is used for rotating the clamp assembly 4 at a fixed angle.

According to the nut blank machining device, the nut blank 8 is firmly clamped through the clamping part 6 and then is fixed on the workbench 2 through the clamp assembly 4, the required anti-loosening groove is milled by the working part 3, the clamping is convenient, the operation is simple, the nut blank 8 is conveniently centered, and the depth of the milled anti-loosening groove is ensured to be consistent; the positioning assembly 7 is used for rotating the nut blank 8 by a fixed angle after the working part 3 mills an anti-loosening groove, so that the anti-loosening grooves distributed outside the nut blank 8 are uniformly distributed, and the use is convenient.

Further, a control box 11 is arranged on the machine body 1 and used for controlling the movement and the milling work of the working part 3; the control box 11 controls the working part 3 in the prior art, and the detailed description is omitted here.

Further, the workbench 2 can translate in the left-right and front-back directions of the top surface of the bed 1, so as to adjust the position of the clamp assembly 4 relative to the working part 3; the worktable 2 is a structure of a conventional milling machine, and the structure and the adjustment method thereof are the prior art and are not described herein again.

Further, the working part 3 comprises a vertical column 31 vertically fixed on one side of the bed 1, the side surface of the vertical column 31 facing the workbench 2 is connected with a top plate 32 in a sliding manner, the bottom surface of the top plate 32 is provided with a second guide assembly 38, and the second guide assembly 38 is in transmission connection with a horizontal adjusting motor 37; the bottom end of the second guide assembly 38 is fixedly provided with a working motor 33, the output end of the working motor 33 is fixedly provided with a milling cutter 34, and the working motor 33 drives the milling cutter 34 to rotate so as to complete the operation of milling an anti-loosening groove on the outer wall of the nut blank 8; the horizontal adjusting motor 37 drives the second guide group to translate, and the position of the working motor 33 is adjusted; the top surface fixed mounting of stand 31 has height adjusting motor 35, and height adjusting motor 35 transmission is connected with first direction subassembly 36, and height adjusting motor 35 drives roof 32 translation from top to bottom through first direction subassembly 36, and then adjusts the height of milling cutter 34.

In a further optimized scheme, the clamp base 5 comprises a base 51 detachably connected with the top surface of the workbench 2, two vertical plates 52 are symmetrically arranged at two ends of the top surface of the base 51, and the clamping part 6 is rotatably connected between the two vertical plates 52; the positioning assembly 7 is disposed in a vertical plate 52.

According to a further optimized scheme, the clamping part 6 comprises an inserting rod 61 and a sleeve 62 which are correspondingly arranged, the inserting rod 61 and the sleeve 62 are respectively and rotatably connected with the opposite surfaces of the two vertical plates 52, the nut blank 8 is sleeved on the inserting rod 61, and the sleeve 62 abuts against the end surface of the nut blank 8; the positioning assembly 7 is arranged in the vertical plate 52 which is rotatably connected with the sleeve 62. During the use, establish nut blank 8 cover on inserted bar 61, then insert the sleeve 62 with inserted bar 61 in, because the inner wall diameter of sleeve 62 is greater than the inner wall diameter of nut blank 8, the outer wall diameter of sleeve 62 is less than the outer wall diameter of nut blank 8, sleeve 62 can promote nut blank 8 and move to riser 52 on inserted bar 61, until pushing up nut blank 8 tightly, accomplish the clamping.

According to a further optimized scheme, the inserting rod 61 comprises a mounting plate which is rotatably connected with the vertical plate 52, an electric push rod 63 is fixedly connected to one end, facing the sleeve 62, of the mounting plate, a conical head 64 is fixedly connected to the output end of the electric push rod 63, a plurality of split grooves 65 are formed in the circumferential direction of the conical head 64 at equal intervals, the conical head 64 is divided into a plurality of elastic blocks through the split grooves 65, and the elastic blocks are abutted to inner holes of the nut blanks 8; the inner cavity of the sleeve 62 is provided with a top block 66, the top block 66 is arranged corresponding to the split groove 65, and the top block 66 is connected with the split groove 65 in a sliding mode. The maximum diameter of the conical head 64 is larger than the inner diameter of the nut blank 8, the minimum diameter is smaller than the inner diameter of the nut blank 8, and the nut blank 8 can be clamped on the conical head 64 after sliding into a certain degree; the electric push rod 63 is used for pushing the conical head 64 to translate, when the conical head is translated to the sleeve 62, the top block 66 in the sleeve 62 enters the split groove 65, the elastic block is expanded to the periphery, the nut blank 8 is expanded tightly, and the nut blank 8 is prevented from moving; because the elastic block is evenly cracked, the center positioning of the nut blank 8 is completed, and the inconsistency of the depths of the anti-loosening grooves on the periphery caused by the eccentricity of the nut blank is prevented.

The positioning component 7 comprises a limiting device and an angle fixing device; the limiting device is arranged in the vertical plate 52, one end of the limiting device is detachably connected with the sleeve 62, and the other end of the limiting device extends out of the vertical plate 52; the angle fixing device is arranged between the vertical plate and the sleeve 62. The limiting device is used for preventing the nut blank 8 from rotating during machining; the angle fixing device is used to limit the angle of each rotation of the sleeve 62.

Further, one end of the sleeve 62 rotatably connected to the vertical plate 52 penetrates through the vertical plate 52 and is fixedly connected to a fixed-angle hand wheel 67 for manually rotating the sleeve 62 to drive the inserting rod 61 and the nut blank 8 to rotate, which is the prior art and is not described again.

According to a further optimized scheme, the limiting device comprises a limiting rod 71, one end of the limiting rod 71 is connected with the sleeve 62 in an inserting mode, the other end of the limiting rod 71 extends out of the vertical plate 52 through a through hole 72 and is fixedly connected with a knob 73, and the limiting rod 71 is connected with the through hole 72 in a sliding mode; a positioning plate 74 is fixedly connected to the limiting rod 71, the positioning plate 74 is positioned in the vertical plate 52, and the diameter of the positioning plate 74 is larger than that of the through hole 72; a return spring 75 is fixedly connected between one end of the positioning plate 74 facing the sleeve 62 and the limiting rod 71, and the return spring 75 is sleeved on the limiting rod 71; a clamping column 76 is vertically and fixedly connected to the limiting rod 71, and the clamping column 76 is matched with a clamping hole 77 formed in the through hole 72. After the clamping of the nut blank 8 is finished, the nut blank is firstly positioned by an angle positioning device, and the positioned position is the position of the first anti-loosening groove; the knob 73 is pressed, the limiting rod 71 is pushed to be inserted into the side wall of the sleeve 62, the clamping column 76 also slides into the position reaching the clamping hole 77 along the through hole 72 at the moment, the knob 73 is rotated to drive the limiting rod 71 to rotate, the clamping column 76 is clamped into the clamping hole 77, the knob 73 is loosened, the limiting rod 71 positions the sleeve 62 at the moment, and the milled anti-loosening groove is prevented from inclining due to deflection in the process of milling the anti-loosening groove by the nut blank 8; after an anti-loosening groove is milled, the knob 73 is rotated reversely, so that the clamping column 76 is separated from the clamping hole 77, the return spring 75 rebounds, the limiting rod 71 is pushed by the positioning plate 74 to slide outwards to be separated from the sleeve 62, the sleeve 62 is unlocked, and the sleeve 62 can rotate again; the sleeve 62 is rotated through an angle to a second anti-loosening groove, and the above positioning process is repeated to lock the sleeve 62 against rotation.

Further, the outer wall of the sleeve 62 is provided with a positioning hole, and when the positioning hole is aligned with the through hole 72, the fixed-angle hole 79 is aligned with the fixed-angle groove 78; one end of the limiting rod 71 in the vertical plate 52 is arranged corresponding to the positioning hole.

According to a further optimized scheme, the fixed angle device comprises fixed angle grooves 78 which are circumferentially arranged on the sleeve 62 at equal intervals, fixed angle holes 79 matched with the fixed angle grooves 78 are formed in the vertical plate 52, fixed angle springs 710 are fixedly connected in the fixed angle holes 79, clamping balls 711 are fixedly connected at the tail ends of the fixed angle springs 710, and the clamping balls 711 are matched with the fixed angle grooves 78. In the embodiment, three anti-loosening grooves are arranged on the outer wall of the locking nut at equal intervals, and the included angle between every two adjacent anti-loosening grooves is 120 degrees; therefore, the outer wall of the sleeve 62 is provided with three fixed angle grooves 78 at equal intervals in the circumferential direction, and the included angle between two adjacent fixed angle grooves 78 is 120 degrees; when the anti-loosening device is used, the sleeve 62 is rotated firstly after the nut blank 8 is clamped, when the fixed-angle groove 78 is aligned with the fixed-angle hole 79, the fixed-angle spring 710 pushes the clamping ball 711 to be clamped into the fixed-angle groove 78, the ' clicking ' sound can be heard at the moment, the position of the first anti-loosening groove is determined, the workbench 2 is controlled to translate left and right, the milling cutter 34 mills the outer edge of the nut blank 8 to form a required anti-loosening groove, after the milling is finished, the workbench 2 is returned to the original position, then the sleeve 62 is rotated again, the fixed-angle groove 78 is dislocated with the fixed-angle hole 79, the clamping ball 711 is pushed by the outer wall of the sleeve 62 to compress the fixed-angle spring 710 and then is retracted into the fixed-angle hole 79 until the next fixed-angle groove 78 is aligned with the fixed-angle hole 79, the clamping ball 711 is pushed by the fixed-angle spring 710 to be clamped into the fixed-angle groove 78 again, the ' clicking ' sounding ' again indicates that the sleeve 62 drives the nut blank 8 to rotate by 120 degrees and reach the position of the next groove, the milling cutter 34 is again used to mill the anti-loosening grooves.

The using method comprises the following steps:

the clamp assembly 4 is installed on the top surface of the workbench 2, then the electric push rod 63 is started to contract, the conical head 64 is separated from the sleeve 62, the nut blank 8 is sleeved on the conical head 64, then the conical head 64 is pushed to move towards the sleeve 62 again, the top block 66 of the sleeve 62 is inserted into the split groove 65 of the conical head 64, the end head of the sleeve 62 pushes the nut blank 8 to slide towards the electric push rod 63, the elastic block divided by the conical head 64 is expanded by the top block 66, and finally the nut blank 8 is clamped. The sleeve 62 is rotated through the fixed-angle hand wheel 67 until the click sound is heard and the hand feels a vibration to indicate that the position of the first anti-loosening groove is well positioned, the knob 73 is pressed, the limiting rod 71 is inserted into the positioning hole, the knob 73 is rotated to clamp the clamping column 76 into the clamping hole 77, and the positioning and locking of the sleeve 62 are completed.

Selecting a proper milling cutter 34 to be installed on the output end of the working motor 33, starting the horizontal adjusting motor 37, adjusting the height of the top plate 32 to enable the bottom end of the milling cutter 34 to be flush with the bottom surface of the anti-loosening groove to be milled, starting the horizontal adjusting motor 37, and adjusting the position of the working motor 33 to enable the axis of the milling cutter 34 and the axis of the nut blank 8 to be in the same plane and perpendicular.

Starting a working motor 33, controlling the workbench 2 to slowly translate left and right, milling a first anti-loosening groove by using a milling cutter 34, horizontally pulling back the workbench 2 after milling, milling the first anti-loosening groove again by using the milling cutter 34, and trimming burrs on the edge; then, the knob 73 is rotated reversely, so that the clamping column 76 is separated from the clamping hole 77, the return spring 75 rebounds to push the limiting rod 71 to slide outwards through the positioning plate 74 to be separated from the sleeve 62, and the sleeve 62 is unlocked; the sleeve 62 is rotated again by the fixed-angle hand wheel 67, the fixed-angle groove 78 is dislocated with the fixed-angle hole 79, the outer wall of the sleeve 62 pushes the clamping ball 711 to compress the fixed-angle spring 710 and then to retract into the fixed-angle hole 79 until the next fixed-angle groove 78 is aligned with the fixed-angle hole 79, the fixed-angle spring 710 pushes the clamping ball 711 to be clamped into the fixed-angle groove 78, the click sound is heard again, the nut blank 8 is driven by the sleeve 62 to rotate through 120 degrees to reach the next anti-loosening groove, and the anti-loosening groove is milled by the milling cutter 34 again.

And repeating the process until all the anti-loosening grooves on one nut blank 8 are milled, starting the electric push rod 63 to separate the conical head 64 from the sleeve 62, taking down the nut blank 8 with the milled anti-loosening grooves, entering the next procedure, taking out a new nut blank 8, clamping and milling the grooves according to the steps.

The utility model has the advantages of simple structure, convenient operation, accurate positioning, consistent depth of milled anti-loosening grooves, uniform distribution of anti-loosening grooves outside each locking nut finished product, and great improvement on the processing efficiency of the anti-loosening grooves of the locking nuts and the yield of the locking nuts.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The above embodiments are only for describing the preferred mode of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.

Claims

1. The utility model provides a processing horizontal milling machine for lock nut which characterized in that: comprises that

The milling machine comprises a machine body (1), wherein the machine body (1) is used as the basis of the milling machine;

the workbench (2) is arranged on the top surface of the lathe bed (1) and used for fixing parts for machining;

the working part (3) is arranged on the top surface of the lathe bed (1), and the working part (3) is used for milling;

the clamp assembly (4) is detachably connected to the top surface of the workbench (2), and the clamp assembly (4) is used for clamping a nut blank (8); the clamp assembly (4) comprises a clamp base (5), a clamping part (6) is arranged on the clamp base (5), and the nut blank (8) is clamped on the clamping part (6); and a positioning component (7) is arranged between the clamping part (6) and the clamp base (5), and the positioning component (7) is used for rotating the clamp component (4) at a fixed angle.

2. The horizontal milling machine for processing lock nuts according to claim 1, characterized in that: the clamp base (5) comprises a base (51) detachably connected with the top surface of the workbench (2), two vertical plates (52) are symmetrically arranged at two ends of the top surface of the base (51), and the clamping part (6) is rotatably connected between the two vertical plates (52); the positioning component (7) is arranged in one vertical plate (52).

3. The horizontal milling machine for processing lock nuts according to claim 2, characterized in that: the clamping part (6) comprises an inserting rod (61) and a sleeve (62) which are correspondingly arranged, the inserting rod (61) and the sleeve (62) are respectively and rotatably connected with opposite surfaces of the two vertical plates (52), the nut blank (8) is sleeved on the inserting rod (61), and the sleeve (62) abuts against the end surface of the nut blank (8); the positioning assembly (7) is arranged in the vertical plate (52) which is rotatably connected with the sleeve (62).

4. The horizontal milling machine for processing lock nuts according to claim 3, characterized in that: inserted bar (61) include with riser (52) rotate the mounting panel of connecting, the mounting panel orientation the one end rigid coupling of sleeve (62) has electric putter (63), the output rigid coupling of electric putter (63) has conical head (64), a plurality of slots (65) have been seted up to conical head (64) circumference equidistant, slots (65) will conical head (64) are cut apart into a plurality of elastic blocks, the elastic block with the hole butt of nut blank (8).

5. The horizontal milling machine for processing lock nuts according to claim 4, wherein: the inner cavity of the sleeve (62) is provided with a top block (66), the top block (66) and the split groove (65) are correspondingly arranged, and the top block (66) is in sliding connection with the split groove (65).

6. The horizontal milling machine for processing lock nuts according to claim 5, wherein: the positioning assembly (7) comprises a limiting device and an angle fixing device; the limiting device is arranged in the vertical plate (52), one end of the limiting device is detachably connected with the sleeve (62), and the other end of the limiting device extends out of the vertical plate (52); the angle fixing device is arranged between the vertical plate and the sleeve (62).

7. The horizontal milling machine for processing lock nuts according to claim 6, wherein: the limiting device comprises a limiting rod (71), one end of the limiting rod (71) is connected with the sleeve (62) in an inserting mode, the other end of the limiting rod (71) extends out of the vertical plate (52) through a through hole (72) and is fixedly connected with a knob (73), and the limiting rod (71) is connected with the through hole (72) in a sliding mode; a positioning plate (74) is fixedly connected to the limiting rod (71), the positioning plate (74) is positioned in the vertical plate (52), and the diameter of the positioning plate (74) is larger than that of the through hole (72); a return spring (75) is fixedly connected between one end of the positioning plate (74) facing the sleeve (62) and the limiting rod (71), and the return spring (75) is sleeved on the limiting rod (71); the limiting rod (71) is vertically and fixedly connected with a clamping column (76), and the clamping column (76) is matched with a clamping hole (77) formed in the through hole (72).

8. The horizontal milling machine for processing lock nuts according to claim 7, wherein: the fixed angle device comprises fixed angle grooves (78) which are circumferentially and equidistantly formed in the sleeve (62), fixed angle holes (79) matched with the fixed angle grooves (78) are formed in the vertical plate (52), fixed angle springs (710) are fixedly connected in the fixed angle holes (79), clamping balls (711) are fixedly connected at the tail ends of the fixed angle springs (710), and the clamping balls (711) are matched with the fixed angle grooves (78).