CN210161779U - Spherical printer and clamp thereof - Google Patents

Abstract

The utility model discloses a clamp applied to spherical printing, which comprises a base; the four fixed shafts are rotatably connected with the rolling bodies on the upper end surface of the base; the rotating shafts of the four rolling bodies are parallel to the upper end face of the base, are distributed in a square shape and are used for surrounding the periphery of the ball body so as to drive the ball body to rotate in a three-dimensional manner by taking the ball center as a rotating center; and the chuck is arranged above all the rolling bodies and used for moving up and down relative to the base to limit the movement of the ball body in the vertical direction. The utility model provides an anchor clamps pass through the chuck of base, spheroid top of spheroid below and enclose establish with the removal of spheroid four rolling elements restriction spheroid in the space for the spheroid only can use the centre of sphere as the rotation center three-dimensional rotation, thereby combines printing device to cover plane pattern in spheroidal surface, realizes the sphere and prints. The utility model also discloses a spherical printer of including above-mentioned anchor clamps.

Description

Spherical printer and clamp thereof

Technical Field

The utility model relates to a printing field especially relates to an anchor clamps of being applied to sphere printing. The utility model discloses still relate to a spherical printer including above-mentioned anchor clamps.

Background

At present, people have higher and higher requirements on the color individualization of products, so that the printing process on the market is also raised to a certain height. Taking the UV printing process as an example, the high-precision UV printer breaks away from the limitations of mold changing and plate making, and can print various color patterns on the concave-convex surface.

Due to technical limitations, UV printers are still currently mainly used for printing flat panels. Of course, some UV printers capable of printing patterns on the curved surface of the cylinder are also available in the market, but the UV printers cannot be applied to the surface of the sphere, so how to print the patterns on the surface of the sphere still restricts the development of the UV printing process.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a be applied to anchor clamps that sphere printed, can adorn the card spheroid so that carry out the sphere and print. Another object of the utility model is to provide a spherical printer including above-mentioned anchor clamps can realize the sphere and print and guarantee the formation of image effect on spheroid surface.

In order to achieve the above object, the utility model provides a be applied to printer that sphere printed, include:

a base;

the four fixed shafts are rotatably connected with the rolling bodies on the upper end surface of the base; the rotating shafts of the four rolling bodies are parallel to the upper end face of the base, are distributed in a square shape and are used for surrounding the periphery of the ball body so as to drive the ball body to rotate in a three-dimensional manner by taking the ball center as a rotating center;

and the chuck is arranged above all the rolling bodies and used for moving up and down relative to the base to limit the movement of the ball body in the vertical direction.

Preferably, the spherical printing device further comprises four servo motors which are respectively connected with all the rolling bodies in a one-to-one correspondence manner and used for driving the four rolling bodies to rotate, and encoders which are connected with all the four servo motors and used for controlling the starting and braking of the four servo motors so as to realize that the sphere moves according to the spherical printing path.

Preferably, the upper end surface of the base is provided with a sinking groove which is concave downwards; all the rolling bodies are arranged in the sunken grooves.

Preferably, the sinking groove is a cross-shaped sinking groove; any one of the rolling bodies is cylindrical, and the four rolling bodies are respectively arranged at the four end parts of the cross-shaped sunken groove;

the rolling body fixed shaft rotation device further comprises rotation terminals which are arranged on two sides of any one end portion and used for driving the rolling body fixed shaft to rotate.

Preferably, the chuck includes:

clamping a plate; the middle part of the clamping plate is provided with a round hole for clamping and embedding the upper end of the sphere;

and the at least three support columns are fixed on the lower end face of the clamping plate and are used for connecting the upper end face of the base.

Preferably, the chuck further comprises a plurality of balls circumferentially arranged on the inner wall of the circular hole and used for reducing friction between the ball body and the chuck plate.

The utility model also provides a spherical printer, including above-mentioned arbitrary anchor clamps, still including being used for the installation the processing platform of anchor clamps with set up in the top of processing platform, be used for the printing device who prints to the spheroid surface.

Preferably, the height adjusting device further comprises a height adjusting table which is arranged on the upper end surface of the processing platform, used for supporting the clamp and adjustable in height.

Preferably, linear sliding grooves for the printing device to slide are formed in two sides of the processing platform; the printing apparatus includes:

two ends of the sliding rail are respectively embedded into the two linear sliding grooves to slide; the length direction of the slide rail is perpendicular to the length direction of the linear sliding chute;

and the sliding block spray head is connected with the sliding rail in a sliding manner and used for spraying to the surface of the sphere.

Preferably, the slider nozzle comprises a nozzle body, and a plurality of ink jetting ports, curing lamps and two laser positioning parts which are arranged on the same side of the nozzle body; the irradiation directions of the two laser positioning parts are crossed with the sphere to realize the positioning of the starting point of the sphere printing.

Compared with the prior art, the clamp applied to spherical printing provided by the utility model comprises a base, wherein the upper end surface of the base is provided with four rolling bodies which can rotate in a fixed axis, and the rotating axes of the four rolling bodies are all parallel to the upper end surface of the base and are enclosed into a square shape so as to limit the movement of the sphere relative to the base in the horizontal plane; a chuck used for limiting the vertical movement of the ball body is also arranged above the ball body; in a word, the base below the sphere, the chuck above the sphere, and the four rolling elements surrounding the sphere can limit the movement of the sphere in the space, and the sphere can only rotate in the space with the sphere center as the rotation center when the four rolling elements rotate respectively around the respective rotation axes, i.e., the sphere rotates three-dimensionally with the sphere center as the rotation center.

The sphere is driven by the four rolling bodies to rotate in space, the rotation of the four rolling bodies is controlled, and any point on the surface of the sphere can rotate to be right below a spray head of the UV printer, namely, the clamp can clamp the sphere for printing and simultaneously expand the spherical curved surface of the sphere in the same plane point by point in a printing period, so that spherical surface printing is realized.

The utility model provides a spherical printer includes above-mentioned anchor clamps, and spherical printer's printing device combines anchor clamps can be according to the spheroid with treat that the concrete size of the plane pattern of printing covers the spheroidal surface with plane pattern is complete, clear.

Drawings

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

Fig. 1 is a schematic structural diagram of a clamp applied to spherical printing according to an embodiment of the present invention;

FIG. 2 is a partial schematic view of FIG. 1;

fig. 3 is a schematic view illustrating an installation of the rolling elements and the base according to an embodiment of the present invention;

FIG. 4 is an exploded view of FIG. 3;

fig. 5 is a schematic structural diagram of a chuck according to an embodiment of the present invention;

FIG. 6 is an exploded view of FIG. 5;

fig. 7 is a schematic structural diagram of a spherical printer according to an embodiment of the present invention;

FIG. 8 is an exploded view of FIG. 7;

fig. 9 is a schematic structural diagram of a processing platform according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a slider showerhead provided in an embodiment of the present invention;

fig. 11 is a schematic structural view of a slide rail according to an embodiment of the present invention;

fig. 12 is a schematic structural view of a slide rail provided in an embodiment of the present invention in another direction;

fig. 13 is a schematic view illustrating an installation of the fixture and the height adjusting platform according to the embodiment of the present invention;

fig. 14 is a schematic structural view of a height adjustment base according to an embodiment of the present invention;

fig. 15 is a schematic structural view of a height adjusting top plate according to an embodiment of the present invention;

wherein, 01-ball, 1-base, 11-sink groove, 111-end, 12-positioning column, 2-rolling element, 3-chuck, 31-chuck, 310-upper chuck, 3101-convex, 311-round hole, 3111-ball groove, 3100-lower chuck, 31001-convex neck, 32-support column, 4-rotation terminal, 5-ball, 6-processing platform, 61-straight chute, 62-cleaning tank, 7-printing device, 71-sliding rail, 711-sliding body, 7111-sliding groove tooth, 7112-first sliding surface, 712-lead screw, 72-sliding block nozzle, 721-nozzle body, 7211-through hole, 7212-second sliding surface, 722-ink jet, 723-curing lamp, 724-laser positioning part, 8-height adjusting table, 81-height adjusting base, 811-adjusting hole, 82-height adjusting top plate, 821-top plate and 822-adjusting column.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

Referring to fig. 1 to 15, fig. 1 is a schematic structural diagram of a clamp for spherical printing according to an embodiment of the present invention; FIG. 2 is a partial schematic view of FIG. 1; fig. 3 is a schematic view illustrating an installation of the rolling elements and the base according to an embodiment of the present invention; FIG. 4 is an exploded view of FIG. 3; fig. 5 is a schematic structural diagram of a chuck according to an embodiment of the present invention; FIG. 6 is an exploded view of FIG. 5; fig. 7 is a schematic structural diagram of a spherical printer according to an embodiment of the present invention; FIG. 8 is an exploded view of FIG. 7; fig. 9 is a schematic structural diagram of a processing platform according to an embodiment of the present invention; fig. 10 is a schematic structural diagram of a slider showerhead provided in an embodiment of the present invention; fig. 11 is a schematic structural view of a slide rail according to an embodiment of the present invention; fig. 12 is a schematic structural view of a slide rail provided in an embodiment of the present invention in another direction; fig. 13 is a schematic view illustrating an installation of the fixture and the height adjusting platform according to the embodiment of the present invention; fig. 14 is a schematic structural view of a height adjustment base according to an embodiment of the present invention; fig. 15 is a schematic structural view of a height adjustment top plate according to an embodiment of the present invention.

Referring to fig. 1 and 2, the present invention provides a fixture for spherical printing, which includes a base 1, four rolling elements 2 rotatably connected to the upper end surface of the base 1 in a fixed axis manner, and a chuck 3 disposed above the base 1 and all the rolling elements 2; the rotating shafts of the four rolling bodies 2 are parallel to the upper end face of the base 1, are distributed in a square shape, and are used for surrounding the periphery of the ball body 01 to limit the movement of the ball body 01 in a horizontal plane; and the movement of the ball 01 in the height direction is realized by the upper end surface of the base 1 and the chuck 3 together.

Because the sphere 01 limits the moving automation degree of three coordinates in the space under the combined action of the base 1, the four rolling bodies 2 and the chuck 3, and the rotating freedom degree of the three coordinates of the sphere 01 is not limited, the sphere 01 can rotate in the space by taking the sphere center of the sphere as a rotating center; certainly, the power for the rotation of the sphere 01 comes from the friction between the four rolling elements 2 and the surface of the sphere 01, that is, when the four rolling elements 2 rotate in different motion combinations, the sphere 01 can be driven to rotate three-dimensionally in the space, and as long as the rotation speeds of the four rolling elements 2 are reasonably set, any point on the surface of the sphere 01 can be rotated to the position where the highest point of the sphere 01 is located to be printed.

It should be noted that, when the rotation speeds of the four rolling elements 2 are adjusted, the adjustment of the rotation speed and the rotation direction of one of the rolling elements 2 also includes controlling the starting and braking of the rolling elements 2, for example, when the ball 01 rotates in one direction, some of the four rolling elements 2 rotate, and some of the four rolling elements 2 are stationary. Of course, this process is realized by a control device which controls the rotation of the four rolling bodies 2, and the rotation track of the ball 01 driven by the four rolling bodies 2 is related to the printing range and the pattern on the surface of the ball 01.

The following provides a further description of the clamp for spherical printing according to the present invention with reference to the accompanying drawings and the embodiments.

The fixture provided by the utility model also comprises four servo motors and encoders which are connected with the four servo motors and used for controlling the starting and braking of the four servo motors; all the servo motors are connected with all the rolling bodies 2 in a one-to-one correspondence manner, that is, one servo motor controls one rolling body 2, and the rotating speed and the rotating direction of the rolling body 2 can be adjusted; all servo motors are controlled by the encoder in a unified mode so that the four rolling bodies 2 drive the ball body 01 to move according to the spherical printing path. For example, the spherical printing path corresponding to the pattern covering the whole spherical surface is more complicated than the spherical printing path corresponding to the pattern covering the partial spherical surface, and any point on the surface of the sphere 01 can be located at the highest point of the sphere 01 when the sphere 01 rotates according to the former so that the pattern completely covers the sphere 01.

On the basis of the above embodiment, referring to fig. 1, fig. 3 and fig. 4, as a way to simplify the connection between the rolling elements 2 and the base 1, the upper end surface of the base 1 has a sunken groove 11 recessed downward, and the rolling elements 2 are installed in the sunken groove 11, so that the inner wall of the sunken groove 11 can be used as a support for installing all the rolling elements 2, thereby improving the strength and stability of the whole fixture and improving the precision of the fixture.

The sinking groove 11 may preferably be a cross-shaped sinking groove, and accordingly the rolling body 2 may be provided in a cylindrical shape; the four rolling bodies 2 are respectively arranged at four end parts 111 of the cross-shaped sunken groove; more specifically, the cross-shaped sinking groove has four end parts 111 in a rectangular parallelepiped (or square) structure, two rotating terminals 4 connected with the same servo motor are arranged on two sides of each end part 111, and two ends of the rolling body 2 are installed in the end parts 111 through the rotating terminals 4; one side of the four rolling bodies 2 far away from the end part 111 is used for surrounding the sphere 01 and is in point contact with the surface of the sphere 01, and when the four rolling bodies 2 rotate under the control of the encoder and all the servo motors, the sphere 01 can be driven to rotate. Wherein the width of either end 111 matches the length of the rolling body 2, and the length of either end 111 is not greater than the diameter of the rolling body 2.

The rotation terminal 4 may be specifically configured as a gear shaft pivotally mounted on an inner wall of the end portion 111, and correspondingly, the two end portions 111 of the rolling bodies 2 are respectively provided with an inner gear ring for meshing with a first gear of the gear shaft. Obviously, the center of any ring gear coincides with the central axis of the rolling body 2, so that the rolling body 2 can rotate around the central axis in a fixed axis mode.

Referring to fig. 1, fig. 2 and fig. 5, on the basis of any of the above embodiments, the chuck 3 of the clamp for spherical printing provided by the present invention may include a chuck plate 31 and at least three supporting columns 32; the centre of cardboard 31 is equipped with round hole 311, and when cardboard 31 was fixed in base 1 and spheroid 01 top through whole support column 32, round hole 311 was passed to the upper end of spheroid 01, and spheroid 01 rotates the in-process round hole 311's inner wall and spheroid 01 surface and is in the rolling friction state, that is to say, cardboard 31 does not restrict the rotation of spheroid 01 in the space, but plays the effect of restriction spheroid 01 rebound. At this time, the printing device may print a pattern on the surface of the ball 01 through the circular hole 311, that is, the area of the surface of the ball 01 exposed above the circular hole 311 is the area to be printed of the current ball 01, and other parts of the surface of the ball 01 gradually enter the area to be printed along with the rotation of the four rolling elements 2.

As described above, the number of the support columns 32 is not less than three, and the three support columns 32 are not collinear. Taking the base 1 and the clamping plate 31 as an example, the number of the supporting columns 32 can be set to four, and the four supporting columns 32 are respectively arranged at four corners of the base 1 and the clamping plate 31.

In order to reduce the friction between round hole 311 and the surface of the sphere 01, improve the sensitivity and the precision of the sphere 01 rotating along with the rolling element 2, the utility model provides a chuck 3 further includes that a plurality of circumference set up in the inner wall of round hole 311, be used for reducing the ball 5 that the friction of sphere 01 surface and the inner wall of round hole 311 also is cardboard 31.

There are various mounting ways for all the balls 5 and the inner wall of the circular hole 311, for example, a plurality of hemispherical ball grooves 3111 may be provided on the inner wall of the circular hole 311, and the number of the ball grooves 3111 is the same as that of the balls 5; a ball groove 3111 is provided for receiving a ball 5, and the ball 5 is three-dimensionally rotatable in the ball groove 3111. Thus, the surface of the ball 01 and the inner wall of the circular hole 311 are changed into multi-point contact from line contact or surface contact, and the ball 5 can rotate along with the rotation of the ball 01, so that the friction force between the ball 5 and the surface of the ball 01 is far smaller than the friction force between the inner wall of the circular hole 311 and the surface of the ball 01, and the sensitivity and the precision of the rotation of the ball 01 along with the rolling body 2 can be greatly improved.

The installation manner of the ball 5 and the inner wall of the circular hole 311 is only one example of the arrangement manner of the plurality of balls 5, and an annular groove may be arranged on the inner wall of the circular hole 311 to install all the balls 5, that is, the ball 5 is arranged in a structure similar to a bearing.

On the basis, in order to reduce the processing difficulty of the chuck 3, please refer to fig. 6, the chuck 3 may further include an upper chuck plate 310 and a lower chuck plate 3100, the supporting posts 32 are disposed on the lower chuck plate 3100, and the circular holes 311 and the ball grooves 3111 are disposed on the upper chuck plate 310; the upper card 310 has a projection 3101 projecting downward from the middle portion thereof, the projection 3101 being fitted into a projection groove 31001 formed in the middle portion of the lower card 3100 when the upper card 310 is connected to the lower card 3100, and the upper card 310 is supported by other portions of the lower card 3100 except for the projection 3101.

Referring to fig. 7 and 8, the present invention further provides a spherical printer, including the fixture according to any of the above embodiments, further including a processing platform 6 and a printing device 7; the printing device 7 is arranged on the upper end face of the processing platform 6 and can do plane motion along the upper end face of the processing platform 6; the jig is fixed to the upper end surface of the processing platform 6 and located below the printing device 7.

For the spherical printer, the printing device 7 actually only plays a role of printing a plane, in order to cover a plane pattern on the surface of the sphere 01, the process that the sphere 01 rotates according to a spherical printing track is actually driven by the four rolling elements 2 in the fixture, in short, the rolling elements 2 drive the sphere 01 to rotate relative to the printing device 7, so that the printing device 7 can paste the plane pattern on the surface of the sphere 01, thereby completing the spherical printing.

In order to match the spherical printing track with the planar pattern, the planar pattern may be subjected to data processing, for example, Matlab is adopted to convert the planar pattern into a curved pattern in a three-dimensional space, and the stretching ratio of the curved pattern conforms to the size of the sphere 01, so that the converted curved pattern can completely cover the surface of the sphere 01.

Referring to fig. 7, 14 and 15, the spherical printer further includes a height adjusting table 8, the height adjusting table 8 is disposed between the upper end surface of the processing platform 6 and the lower end surface of the base 1, and the height adjusting table 8 can adjust the height up and down to change the height of the base 1 relative to the processing platform 6, so as to implement spherical printing by matching with fixtures with different installation diameters and the sphere 01.

The height adjusting platform 8 may specifically include a height adjusting base 811 and a height adjusting top plate 82, four telescopic adjusting columns 822 are disposed between the height adjusting top plate 82 and the height adjusting base 811, the adjusting columns 822 may be connected with a top plate 821 of the height adjusting top plate 82, and correspondingly, four adjusting holes 811 for respectively installing with the four adjusting columns 822 to achieve fixed connection are disposed on an upper end surface of the height adjusting base 811. The height of the height-adjusting stage 8 can be lowered by synchronously lowering the heights of the four adjusting columns 822, whereas the height of the height-adjusting stage 8 can be increased by synchronously increasing the heights of the four adjusting columns 822.

Referring to fig. 13, 14 and 15, regarding the arrangement of the top plate 821, at least two positioning pillars 12 for positioning the top plate 821 and the base 1 may be arranged on the lower end surface of the base 1. Taking the base 1 in a rectangular parallelepiped shape as an example, the number of the positioning columns 12 is four, and the four positioning columns 12 are respectively disposed at four corners of the base 1.

Referring to fig. 7, 9, 11 and 12, on the basis of the above embodiment, the two sides of the processing platform 6 are provided with the linear sliding chutes 61 for the printing device 7 to slide, and meanwhile, the printing device 7 may include a sliding rail 71 and a slider nozzle 72 slidably connected to the sliding rail 71; two ends of the slide rail 71 are embedded into the two linear slide grooves 61 and are used for moving along the length direction of the linear slide grooves 61; the length direction of the slide rail 71 is perpendicular to the length direction of the linear slide groove 61, and when the slider spray head 72 slides along the slide rail 71 and the slide rail 71 slides along the linear slide groove 61, the slider spray head 72 can translate to any position along the horizontal plane. At this time, the upper end surface of the processing platform 6 may be provided with a cleaning tank 62, and the printing device 7 may be moved to the cleaning tank 62 for cleaning after printing is completed each time, and may be moved to the position right above the jig again for printing after cleaning.

The sliding rail 71 may include two sliding bodies 711 having sliding groove teeth 7111 on the lower end surface thereof, and a screw 712 connected between the two sliding bodies 711, and the slider nozzle 72 has a through hole 7211 for slidably connecting the screw 712; further, in order to ensure the stability of the slider nozzle 72 during the sliding along the lead screw 712, the sliding rail 71 further includes a first sliding surface 7112 parallel to the lead screw 712, and the slider nozzle 72 is provided with a second sliding surface 7212 attached to the first sliding surface 7112.

In order to improve the spherical printing effect, please refer to fig. 7 and 10, the slider nozzle 72 of the spherical printer of the present invention includes a nozzle body 721, a plurality of ink nozzles 722 disposed on the same side of the nozzle body 721, a curing lamp 723, and two laser positioning portions 724; the plurality of ink jetting ports 722 are correspondingly connected with the plurality of pigment boxes, and can spray a plurality of colors on the surface of the sphere 01 to realize color printing; one or more curing lamps 723 can be arranged to accelerate the solidification of the pigment sprayed on the surface of the sphere 01; the two laser positioning portions 724 are distributed at two opposite positions on the same side of the nozzle body 721, and are usually located at two ends of a diagonal line, so that two crossed laser lines can be formed on the surface of the sphere 01, and the intersection point of the two laser lines is the printing starting point of the sphere 01.

It is right above the utility model provides a spherical printer and anchor clamps thereof have carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (10)

1. The utility model provides a be applied to sphere printing's anchor clamps which characterized in that includes:

a base (1);

the four fixed shafts are rotatably connected with the rolling bodies (2) on the upper end surface of the base (1); the rotating shafts of the four rolling bodies (2) are parallel to the upper end face of the base (1), are distributed in a square shape, and are used for surrounding the sphere (01) to drive the sphere (01) to rotate three-dimensionally by taking the sphere center as a rotating center;

and the chuck (3) is arranged above all the rolling bodies (2) and is used for moving up and down relative to the base (1) to limit the movement of the ball body (01) in the vertical direction.

2. The fixture according to claim 1, further comprising four servo motors connected to all the rolling bodies (2) in a one-to-one correspondence, and configured to drive the four rolling bodies (2) to rotate, and encoders connected to all the four servo motors and configured to control the actuation and braking of the four servo motors to move the ball (01) along the spherical printing path.

3. The clamp according to claim 2, characterized in that the upper end face of the base (1) has a sunken groove (11) which is concave downwards; all the rolling bodies (2) are arranged in the sunken grooves (11).

4. A clamp as claimed in claim 3, characterized in that said sinkers (11) are cross-shaped sinkers; any one of the rolling bodies (2) is cylindrical, and the four rolling bodies (2) are respectively arranged at four end parts (111) of the cross-shaped sunken groove;

the rolling mechanism further comprises rotating terminals (4) which are arranged on two sides of any end portion (111) and used for driving the rolling bodies (2) to rotate in a fixed shaft mode.

5. The clamp according to any of claims 1 to 4, characterized in that said chuck (3) comprises:

a card (31); the middle part of the clamping plate (31) is provided with a round hole (311) for clamping and embedding the upper end of the ball body (01);

and at least three supporting columns (32) which are fixed on the lower end surface of the clamping plate (31) and are used for connecting the upper end surface of the base (1).

6. The clamp according to claim 5, characterized in that the chuck (3) further comprises a plurality of balls (5) circumferentially arranged on the inner wall of the circular hole (311) for reducing friction between the ball (01) and the clamping plate (31).

7. Spherical printer, characterized in that it comprises a clamp according to any one of claims 1 to 6, a working platform (6) for mounting the clamp and a printing device (7) arranged above the working platform (6) for printing on the surface of a sphere (01).

8. The spherical printer according to claim 7, further comprising a height-adjustable height-adjusting table (8) mounted on the upper end surface of said machining platform (6) for supporting said jig.

9. Spherical printer according to claim 8, characterized in that said machining platform (6) is provided, on both sides, with rectilinear runners (61) for the sliding of said printing means (7); the printing device (7) comprises:

two ends of the sliding rail (71) are respectively embedded into the two linear sliding grooves (61) to slide; the length direction of the slide rail (71) is vertical to the length direction of the linear chute (61);

and the sliding block spray head (72) is connected with the sliding rail (71) in a sliding way and is used for spraying the surface of the sphere (01).

10. The spherical printer according to claim 9, wherein said slider head (72) comprises a head body (721) and a plurality of ink ejection ports (722), curing lamps (723) and two laser positioning portions (724) arranged on the same side of said head body (721); the irradiation directions of the two laser positioning parts (724) are intersected with the sphere (01) to realize the positioning of the starting point of the printing of the sphere (01).

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