CN111571365A

CN111571365A - Non-fixed grinding device suitable for ball body with hole groove

Info

Publication number: CN111571365A
Application number: CN202010489990.5A
Authority: CN
Inventors: 朱青松
Original assignee: 朱青松
Current assignee: NANTONG WANDA FRICTION MATERIAL Co.,Ltd.
Priority date: 2020-06-02
Filing date: 2020-06-02
Publication date: 2020-08-25
Anticipated expiration: 2040-06-02
Also published as: CN111571365B

Abstract

The invention discloses a non-fixed grinding device suitable for a ball body with a hole groove, which belongs to the field of grinding devices and comprises a base, wherein the upper end of the base is fixedly connected with a vertical plate, a controller and a motor, the controller and the motor are positioned on the same side of the vertical plate, one side of the vertical plate far away from the controller is fixedly connected with a fixed rod, the non-fixed grinding device innovatively adopts a mode of not fixing the ball body in the process of grinding the ball body with the hole groove, the bullet gun body is matched with the hole groove on the ball body to drive the ball body to rotate between the pair of main grinding plates along the ball center, the ball body is limited by the pair of main grinding plates, so that the surface of the ball body is ground while the stable rotation of the ball body is ensured, thereby for foraminiferous groove spheroid provide one kind and need not fixed innovation formula mode of polishing, solved the problem that foraminiferous groove spheroid is unstable to be fixed and takes place to rotate in the prior art of polishing from the source.

Description

Non-fixed grinding device suitable for ball body with hole groove

Technical Field

The invention relates to the field of polishing devices, in particular to a non-fixed polishing device suitable for a sphere with a hole.

Background

Polishing, which is one of surface modification techniques, generally refers to a processing method for changing physical properties of a material surface by friction with the aid of a rough object (e.g., sandpaper containing particles with high hardness, etc.), and is mainly aimed at obtaining a specific surface roughness; the processing aims at removing burrs on the surface of a product workpiece to make the workpiece smooth, and the workpiece is easy to continue processing or reach a finished product; the tools used are mainly grinding machines, grinding wheel mills, etc. Smaller hand workshops also have angle grinders, operated manually with sandpaper.

At present, workpieces with a spherical structure are widely applied, the smoothness of a spherical surface is one of indexes for measuring the quality of the workpieces, in the existing grinding technology, a spherical body is generally fixed firstly, then grinding equipment is used for grinding the spherical surface, however, due to the structural characteristics of the spherical body, how to stably fix the spherical body in the grinding process is the most common problem and the most difficult problem, and once the spherical body is fixed unstably, the phenomenon that the spherical body rotates along with the grinding equipment in the grinding process is very easy to occur.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a non-fixed polishing device suitable for a sphere with a hole groove, which innovatively adopts a mode of not fixing the sphere, drives the sphere to rotate between a pair of main polishing plates along the sphere center through matching a bullet gun body with the hole groove in the sphere, and limits the sphere through the pair of main polishing plates to ensure the stable rotation of the sphere and simultaneously polish the surface of the sphere, thereby providing a non-fixed innovative polishing mode for the sphere with the hole groove, and solving the problem that the sphere with the hole groove in the prior polishing technology is not fixed and rotates from the source.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A non-fixed grinding device suitable for a sphere with a hole groove comprises a base, wherein the upper end of the base is fixedly connected with a vertical plate, a controller and a motor, the controller and the motor are positioned on the same side of the vertical plate, one side, far away from the controller, of the vertical plate is fixedly connected with a fixed rod, the outer end of the fixed rod is rotatably connected with a main gear, a pinion is arranged right under the main gear, the output end of the controller penetrates through the vertical plate and is fixedly connected with the inner surface of the pinion, the main gear is meshed with the pinion, one end, far away from the vertical plate, of the main gear is fixedly connected with an eccentric shaft, the end part of the eccentric shaft is fixedly connected with a bullet gun body, the upper side of the base is provided with a moving seat, one ends, close to each other, of the moving seat and the fixed rod are fixedly connected with a main grinding plate, the lower end, the electric sliding block is connected with the guide rail in a sliding mode, the motor and the electric sliding block are electrically connected with the controller, and one end, close to each other, of each of the pair of main polishing plates is provided with the pair of auxiliary polishing plates.

Furthermore, the bullet gun body comprises a pipe sleeve, an inner groove and a spiral groove which are mutually communicated are formed in the pipe sleeve, a bullet head is connected to the inner portion of the inner groove in a sliding mode, the tip end of the bullet head is located on one side close to the main polishing plate, an extension spring is fixedly connected between the non-tip end of the bullet head and the inner bottom surface of the inner groove, the bullet head can be suitable for hole grooves with different sizes, the application range of the bullet gun body is enlarged, the extension spring is used for connecting the bullet head and the pipe sleeve, the bullet head is far away from a ball body in the initial state of the extension spring, most of the bullet head is located on the inner side of the inner groove, and the ball body can be conveniently placed between and taken out of.

Furthermore, the bullet rifle body still includes the screw rod with thread groove threaded connection, the spacing groove has been seted up at the non-most end of bullet head, the screw rod is inserted and is located the inside of spacing groove, extension spring overlaps in the outside of screw rod, the outer end threaded connection of screw rod has the nut, makes the bullet head stably insert spheroidal hole groove through screw rod and nut to realize that the bullet rifle body drives the spheroid and rotates.

Further, the upper end and the lower end of the main grinding plate are provided with grooves, the pair of inner walls of the grooves are provided with sliding grooves, the auxiliary grinding plate comprises grinding blocks located on the inner side of the grooves, a pair of side ends of the grinding blocks are fixedly connected with sliding blocks, the sliding blocks are connected to the inner portions of the sliding grooves in a sliding mode, and the grinding blocks move back and forth on the inner side of the grooves in a matched mode.

Furthermore, the inner fixedly connected with magnetic sheet of abrasive brick, the same fixedly connected with magnetic sheet of inner wall of recess under the external force condition of not receiving, through repulsion between a pair of magnetic sheet, make the abrasive brick on a pair of main board of polishing closely laminate in mutual contact, realize polishing sphere maximum comprehensive through main board of polishing and vice board of polishing, when the bullet rifle body rotates the position of vice board of polishing, the bullet head extrudees the side inclined plane of abrasive brick, makes the abrasive brick slide to the recess inboard, when the bullet rifle body passes through completely, under the repulsion of a pair of magnetic sheet, the abrasive brick resumes the normal position again.

Furthermore, the end, far away from the magnetic sheet, of the grinding block is in an isosceles trapezoid shape, so that the side face of the grinding block can move towards the inner side of the groove when being extruded.

Furthermore, a pair of minimum interval between the main board of polishing is greater than the biggest outer lane diameter of bullet head, makes the bullet head can pass through between a pair of main board of polishing completely, and main board of polishing can not cause the hindrance to the rotation of bullet head, the vertical length of bullet rifle body is less than the interval of main board of polishing to the base, makes the bullet rifle body realize 360 rotations on the vertical direction without hindrance.

A non-fixed grinding device suitable for a ball with a hole groove comprises the following using method:

s1, a technician places the sphere between the pair of main grinding plates, and makes a certain groove (or hole) on the sphere aligned with the bullet gun body, and starts the electric slide block through the controller to drive the moving seat and the main grinding plates to move, so that the pair of main grinding plates are attached to the surface of the sphere;

s2, inserting the screw rod into the screw groove and the limiting groove in sequence and continuously screwing to enable the bullet head to be inserted into the ball groove (or hole), and then fixing the screw rod through the nut;

and S3, starting the motor through the controller, driving the main gear to rotate outside the fixed rod through the pinion, rotating the eccentric shaft and the bullet gun body along with the main gear, and driving the ball body to rotate inside the pair of main grinding plates through the bullet gun body to realize the grinding of the main grinding plate and the auxiliary grinding plate on the surface of the ball body.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) this scheme is at the in-process of polishing taking the spheroid in empty hole groove, innovatively adopts the mode of not fixing the spheroid, through the hole groove on the bullet rifle body cooperation spheroid, it rotates along the centre of sphere between a pair of main board of polishing to drive the spheroid, it is spacing to carry out the spheroid through a pair of main board of polishing, when guaranteeing that the spheroid is stable pivoted, also realized polishing to the spheroid surface, thereby for the foraminiferous groove spheroid provides one kind and need not fixed innovation formula mode of polishing, the problem of taking the hole groove spheroid to fix unstably to take place the pivoted in the current technique of polishing in the source has been solved.

(2) The bullet gun body comprises a pipe sleeve, an inner groove and a spiral groove which are mutually communicated are formed in the pipe sleeve, a bullet head is connected in the inner groove in a sliding mode, the tip end of the bullet head is located on one side close to the main polishing plate, an extension spring is fixedly connected between the non-tip end of the bullet head and the inner bottom surface of the inner groove, the bullet head can be suitable for hole grooves with different sizes, the application range of the bullet gun body is enlarged, the extension spring is used for connecting the bullet head and the pipe sleeve, the bullet head is far away from a ball body in the initial state of the extension spring, most of the bullet head is located on the inner side of the inner groove, and the ball body can be placed between and taken.

(3) The bullet rifle body still includes the screw rod with thread groove threaded connection, and the spacing groove has been seted up at the non-most end of bullet head, and the screw rod is inserted and is located the inside of spacing groove, and extension spring overlaps in the outside of screw rod, and the outer end threaded connection of screw rod has the nut, makes the bullet head stably insert spheroidal hole groove through screw rod and nut to realize that the bullet rifle body drives the spheroid and rotates.

(4) The upper and lower both ends of main grinding plate all are seted up flutedly, and the spout has all been seted up to a pair of inner wall of recess, and vice grinding plate is including being located the inboard abrasive brick of recess, the equal fixedly connected with slider of a pair of side of abrasive brick, and slider sliding connection realizes the round trip movement of abrasive brick in the recess inboard through the cooperation of slider and spout in the inside of spout.

(5) The inner fixedly connected with magnetic sheet of abrasive brick, the same fixedly connected with magnetic sheet of inner wall of recess, under the external force circumstances not, through repulsion between a pair of magnetic sheet, make the abrasive brick on a pair of main board of polishing closely laminate in mutual contact, realize polishing the sphere maximum comprehensively through main board of polishing and vice board of polishing, when the bullet rifle body rotates the position of vice board of polishing, the bullet head extrudees the side inclined plane of abrasive brick, make the abrasive brick slide to the recess inboard, when the bullet rifle body completely passes through, under the repulsion of a pair of magnetic sheet, the abrasive brick resumes the normal position again.

(6) The end of the grinding block far away from the magnetic sheet is in an isosceles trapezoid shape, so that the side face of the grinding block can move towards the inner side of the groove when being extruded.

(7) The minimum interval between a pair of main board of polishing is greater than the biggest outer lane diameter of bullet head, makes the bullet head pass through between a pair of main board of polishing completely, and main board of polishing can not cause the hindrance to the rotation of bullet head, and the vertical length of bullet rifle body is less than the interval of main board of polishing to the base, makes the bullet rifle body realize 360 rotations on the vertical direction without hindrance.

Drawings

FIG. 1 is a first perspective view of the present invention;

FIG. 2 is a second perspective view of the present invention;

FIG. 3 is a third perspective view of the present invention;

FIG. 4 is a fourth perspective view of the present invention;

FIG. 5 is a schematic view of the structure at A in FIG. 4;

FIG. 6 is a schematic view of the top surface of the secondary sanding plate of the present invention;

fig. 7 is a schematic front view of the bullet gun body of the present invention in an initial state;

FIG. 8 is a first schematic front view of the bullet gun body of the present invention inserted into a slotted ball;

FIG. 9 is a second schematic front view of the bullet gun body of the present invention inserted into a sphere with a slot;

fig. 10 is a third schematic front view of the bullet gun body of the present invention inserted into a sphere with a hole.

The reference numbers in the figures illustrate:

the automatic grinding machine comprises a base 1, a vertical plate 2, a controller 3, a fixed rod 4, a main gear 5, a main grinding plate 6, a groove 601, a sliding chute 602, a secondary grinding plate 7, a grinding block 71, a sliding block 72, a magnetic sheet 73, an eccentric shaft 8, a bullet gun body 9, a pipe sleeve 91, an internal groove 9101, a spiral groove 9102, a bullet head 92, a limiting groove 9201, a tension spring 93, a screw 94, a nut 95, a secondary gear 10, a motor 11, a movable seat 12, an electric sliding block 13 and a guide rail 14.

Detailed Description

The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

referring to fig. 1, 2 and 3, an unfixed polishing device for a sphere with a hole comprises a base 1, a vertical plate 2 fixedly connected to the upper end of the base 1, a controller 3 and a motor 11, wherein the controller 3 and the motor 11 are located on the same side of the vertical plate 2, a fixed rod 4 is fixedly connected to one side of the vertical plate 2 away from the controller 3, a main gear 5 is rotatably connected to the outer end of the fixed rod 4, two sides of the main gear 5 are respectively provided with a limiting piece fixed to the outer end of the fixed rod 4, a pair of limiting pieces limit the main gear 5 so that the main gear 5 does not move on the fixed rod 4 during rotation, a pinion 10 is arranged right under the main gear 5, the output end of the controller 3 penetrates through the vertical plate 2 and is fixedly connected to the inner surface of the pinion 10, the main gear 5 is meshed with the pinion 10, an eccentric shaft 8 is fixedly connected to one end of the main gear 5 away from the vertical plate 2, the tip fixedly connected with bullet rifle body 9 of eccentric shaft 8, the upside of base 1 is equipped with removes seat 12, remove the equal fixedly connected with main board of polishing of one end 6 that seat 12 and fixed rod 4 are close to each other, the lower extreme fixedly connected with electric slider 13 of removing seat 12, the upper end fixedly connected with guide rail 14 of base 1,

electric slider

13 and 14 sliding connection of guide rail, motor 11 and electric slider 13 all with 3 electric connection of controller, the one end that a pair of main board of polishing 6 are close to each other all is equipped with a pair of vice board of polishing 7.

Referring to fig. 7 and 8, the bullet gun body 9 includes a tube sleeve 91, an inner groove 9101 and a spiral groove 9102 which are communicated with each other are formed inside the tube sleeve 91, a bullet head 92 is slidably connected inside the inner groove 9101, a tip end of the bullet head 92 is located at a side close to the main polishing plate 6, an extension spring 93 is fixedly connected between a non-tip end of the bullet head 92 and an inner bottom surface of the inner groove 9101, the bullet head 92 can be adapted to the hole grooves with different sizes, the application range of the present invention is enlarged, the extension spring 93 is used for connecting the bullet head 92 and the tube sleeve 91, in an initial state of the extension spring 93, the bullet head 92 is far away from the ball, most of which is located inside the inner groove 9101, so as to facilitate placement and taking out of the ball between the pair of main polishing plates 6, the bullet gun body 9 further includes a screw 94 which is in threaded connection with the spiral groove 9102, the non-tip end of the bullet head 92 is formed with a limit groove 9201, the extension spring 93 is sleeved outside the screw rod 94, the outer end of the screw rod 94 is in threaded connection with a nut 95, and the bullet head 92 is stably inserted into the hole groove of the sphere through the screw rod 94 and the nut 95, so that the bullet gun body 9 drives the sphere to rotate.

It should be noted that: the first condition is as follows: referring to fig. 8, when the hole diameter of the ball hole (or the aperture of the groove) is smaller, the bullet 92 is inserted into the hole (or the groove) until the bullet 92 abuts against the hole opening (notch); case two: referring to fig. 9, when the aperture of the ball groove is larger but the depth is shallower, the bullet 92 is inserted into the groove to abut against the bottom of the groove; case three: referring to fig. 10, when the aperture of the hole (or the aperture of the groove) of the ball is larger than the maximum outer diameter of the bullet 92, the insertion position of the bullet 92 needs to be controlled automatically during the insertion of the bullet 92, so that the bullet 92 can be inserted into the hole (or the groove) as far as possible, and the bullet 92 can drive the ball to rotate better, and in all three cases, the bullet 92 needs to be fixed by the screw 94 and the nut 95.

Referring to fig. 5 and 6, grooves 601 are respectively formed at the upper and lower ends of the main polishing plate 6, a pair of inner walls of the grooves 601 are respectively provided with a sliding slot 602, the auxiliary polishing plate 7 includes a polishing block 71 located at the inner side of the sliding slot 602, a pair of side ends of the polishing block 71 are respectively fixedly connected with a sliding block 72, the sliding block 72 is slidably connected inside the sliding slot 602, the polishing block 71 moves back and forth at the inner side of the groove 601 through the cooperation of the sliding block 72 and the sliding slot 602, one end of the polishing block 71 away from the magnetic sheet 73 is in an isosceles trapezoid shape, so that the side surfaces of the polishing block 71 can move towards the inner side of the groove 601 when being extruded, the inner end of the polishing block 71 is fixedly connected with the magnetic sheet 73, the inner wall of the groove 601 is also fixedly connected with the magnetic sheet 73, under the condition of no external force, the polishing blocks 71 on the pair of main polishing plates 6 are contacted and tightly adhered to each other through the repulsion force between, when the bullet gun body 9 rotates to the position of the auxiliary grinding plate 7, the bullet heads 92 extrude the side end inclined surfaces of the grinding blocks 71, so that the grinding blocks 71 slide towards the inner sides of the grooves 601, and when the bullet gun body 9 completely passes through, the grinding blocks 71 return to the original positions under the repulsive force of the pair of magnetic sheets 73.

Referring to fig. 3, the minimum distance between the pair of main grinding plates 6 is greater than the maximum outer diameter of the bullet head 92, so that the bullet head 92 can completely pass between the pair of main grinding plates 6, the main grinding plates 6 do not hinder the rotation of the bullet head 92, the vertical length of the bullet gun body 9 is smaller than the distance between the main grinding plates 6 and the base 1, and the bullet gun body 9 can rotate 360 degrees in the vertical direction without hindrance.

s1, a technician places a sphere between the pair of main grinding plates 6, aligns a certain groove (or hole) on the sphere with the bullet gun body 9, starts the electric slide block 13 through the controller 3, drives the moving seat 12 and the main grinding plates 6 to move, and enables the pair of main grinding plates 6 to be attached to the surface of the sphere;

s2, sequentially inserting the screw rod 94 into the screw groove 9102 and the limiting groove 9201 and continuously screwing to enable the bullet head 92 to be inserted into the ball groove (or hole), and then fixing the screw rod 94 through the nut 95;

s3, the controller 3 starts the motor 11, the pinion 10 drives the main gear 5 to rotate outside the fixed rod 4, the eccentric shaft 8 and the bullet gun body 9 rotate along with the main gear, and the bullet gun body 9 drives the ball to rotate inside the pair of main grinding plates 6, so that the grinding of the main grinding plates 6 and the auxiliary grinding plates 7 on the surface of the ball is realized.

In the process of polishing the sphere with the hollow groove, the sphere is innovatively fixed, the bullet gun body 9 is matched with the hole groove in the sphere to drive the sphere to rotate between the pair of main polishing plates 6 along the sphere center, and the pair of main polishing plates 6 limit the sphere, so that the surface of the sphere is polished while the sphere is ensured to rotate stably, a fixing-free innovative polishing mode is provided for the sphere with the hole groove, and the problem that the sphere with the hole groove in the prior polishing technology is not stably fixed and rotates is solved from the source.

The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.

Claims

1. The utility model provides a non-fixed grinding device suitable for foraminiferous groove spheroid, includes base (1), its characterized in that: the upper end of the base (1) is fixedly connected with a vertical plate (2), a controller (3) and a motor (11), the controller (3) and the motor (11) are positioned on the same side of the vertical plate (2), one side of the vertical plate (2) far away from the controller (3) is fixedly connected with a fixed rod (4), the outer end of the fixed rod (4) is rotatably connected with a main gear (5), an auxiliary gear (10) is arranged right under the main gear (5), the output end of the controller (3) penetrates through the vertical plate (2) and is fixedly connected with the inner surface of the auxiliary gear (10), the main gear (5) is meshed with the auxiliary gear (10), one end of the main gear (5) far away from the vertical plate (2) is fixedly connected with an eccentric shaft (8), the end of the eccentric shaft (8) is fixedly connected with a bullet gun body (9), the upper side of the base (1) is provided with a movable seat (12), remove the equal fixedly connected with main board (6) of polishing of one end that seat (12) and fixed rod (4) are close to each other, the lower extreme fixedly connected with electric slider (13) of removing seat (12), the upper end fixedly connected with guide rail (14) of base (1), electric slider (13) and guide rail (14) sliding connection, motor (11) and electric slider (13) all with controller (3) electric connection, it is a pair of main board (6) of polishing one end that is close to each other all is equipped with a pair of vice board (7) of polishing.

2. A non-stationary sanding device for a grooved ball according to claim 1 wherein: the bullet gun body (9) comprises a pipe sleeve (91), an inner groove (9101) and a spiral groove (9102) which are communicated with each other are formed in the pipe sleeve (91), a bullet head (92) is connected to the inner portion of the inner groove (9101) in a sliding mode, the tip end of the bullet head (92) is located on one side close to the main polishing plate (6), and a tension spring (93) is fixedly connected between the non-tip end of the bullet head (92) and the inner bottom surface of the inner groove (9101).

3. A non-stationary sanding device for a grooved ball according to claim 2 wherein: the bullet rifle body (9) still include with thread groove (9102) threaded connection's screw rod (94), spacing groove (9201) have been seted up to the non-pointed end of bullet head (92), screw rod (94) are inserted and are located the inside of spacing groove (9201), extension spring (93) cover is in the outside of screw rod (94), the outer end threaded connection of screw rod (94) has nut (95).

4. A non-stationary sanding device for a grooved ball according to claim 1 wherein: the upper and lower both ends of main board (6) of polishing all set up fluted (601), spout (602) have all been seted up to a pair of inner wall of recess (601), vice board (7) of polishing is including lieing in inboard abrasive brick (71) of recess (601), the equal fixedly connected with slider (72) of a pair of side of abrasive brick (71), slider (72) sliding connection is in the inside of spout (602).

5. A non-stationary sanding device for a grooved ball according to claim 4 wherein: the inner end of the grinding block (71) is fixedly connected with a magnetic sheet (73), and the inner wall of the groove (601) is also fixedly connected with the magnetic sheet (73).

6. A non-stationary sanding device for a grooved ball according to claim 5 wherein: one end of the grinding block (71) far away from the magnetic sheet (73) is in an isosceles trapezoid shape.

7. A non-stationary sanding device for a grooved ball according to claim 3 wherein: the minimum distance between the pair of main grinding plates (6) is larger than the maximum outer ring diameter of the bullet head (92), and the vertical length of the bullet gun body (9) is smaller than the distance between the main grinding plates (6) and the base (1).

8. A non-stationary grinding device adapted for use with a grooved ball according to any of claims 1-7, characterized in that: the using method comprises the following steps:

s1, a technician places a sphere between a pair of main grinding plates (6), aligns a certain groove (or hole) on the sphere with a bullet gun body (9), starts an electric slider (13) through a controller (3), drives a moving seat (12) and the main grinding plates (6) to move, and enables the pair of main grinding plates (6) to be attached to the surface of the sphere;

s2, sequentially inserting the screw rod (94) into the screw groove (9102) and the limiting groove (9201) and continuously screwing to enable the bullet head (92) to be inserted into the ball groove (or hole), and then fixing the screw rod (94) through the nut (95);

s3, starting the motor (11) through the controller (3), driving the main gear (5) to rotate outside the fixed rod (4) through the pinion (10), driving the sphere to rotate inside the pair of main grinding plates (6) through the bullet gun body (9) along with the rotation of the eccentric shaft (8) and the bullet gun body (9), and grinding the surface of the sphere through the main grinding plates (6) and the auxiliary grinding plates (7).