阅读说明：本技术 一种带旋转分度盘的机床 (Machine tool with rotary dividing disc ) 是由 张小萍 李保宁 于 2021-10-11 设计创作，主要内容包括：本发明公开了一种带旋转分度盘的机床,包括固定单元,包括机床和安装在所述机床上的固定架；以及,操作单元,安装在所述固定架上,包括分度组件和夹持组件。本发明采用的分度组件结构简单易于操作,通过转动操作杆即可带动整个分度盘进行旋转,分度组件与夹持组件可进行更换,可以适应不同的分度要求；本发明采用的夹持组件能对圆柱型材料进行固定夹持,夹爪均为同步旋转,能对夹持的材料进行自动定心,同时,夹爪替换方便,换用不同大小的夹爪可适应不同直径大小的材料。(The invention discloses a machine tool with a rotary dividing disc, which comprises a fixing unit, a rotary dividing disc and a rotary dividing disc, wherein the fixing unit comprises a machine tool and a fixing frame arranged on the machine tool; and the operation unit is arranged on the fixed frame and comprises an indexing component and a clamping component. The indexing assembly adopted by the invention has a simple structure and is easy to operate, the whole indexing disc can be driven to rotate by rotating the operating rod, and the indexing assembly and the clamping assembly can be replaced, so that different indexing requirements can be met; the clamping assembly adopted by the invention can fixedly clamp cylindrical materials, the clamping jaws synchronously rotate, the clamped materials can be automatically centered, meanwhile, the clamping jaws are convenient to replace, and the clamping jaws with different sizes can adapt to materials with different diameters.)

1. The utility model provides a lathe of rotatory graduated disk in area which characterized in that: the method comprises the following steps:

a fixing unit (100) comprising a machine tool (101) and a fixing frame (102) mounted on the machine tool (101); and the number of the first and second groups,

the operation unit (200) is arranged on the fixed frame (102) and comprises an indexing component (201) and a clamping component (202); the rotary table is characterized in that the indexing assembly (201) is fixedly connected with the clamping assembly (202), the outer portion of the indexing assembly (201) is cylindrical, the indexing assembly (201) comprises a rotary disc (201 a), a fixed block (201 b), an operating rod (201 c) and a movable piece (201 d), a circular ring structure (102 a) is arranged in the middle of the fixed frame (102), and the rotary disc (201 a) is installed in the circular ring structure (102 a).

2. A machine tool with a rotary indexing disk according to claim 1, wherein: lathe (101) include workstation (101 a) and cutter (101 b), workstation (101 a) are the right angle structure, cutter (101 b) are installed on an edge in the right angle, mount (102) are installed on another edge, mount (102) with be equipped with operating space (R) between workstation (101 a).

3. A machine tool with a rotary indexing disk according to claim 2, wherein: the middle of one surface of the rotating disc (201 a) is provided with a limiting groove (201 a-1), the middle of the limiting groove (201 a-1) is a regular polygon, each vertex of the regular polygon extends out of a straight groove along the radial direction of the rotating disc (201 a), and the edge of the rotating disc (201 a) is provided with a first flange (201 a-2).

4. A machine tool with rotary indexing disk according to claim 3, wherein: the rotating disc (201 a) is also provided with a first hinge hole (201 a-3), two ends of the fixed block (201 b) are fixedly connected with the fixed frame (102), a second hinge hole (201 b-1) is formed in the middle of the fixed block (201 b), one end of the operating rod (201 c) penetrates through the second hinge hole (201 b-1) and is hinged with the first hinge hole (201 a-3), the operating rod (201 c) is also provided with a rotating head (201 c-1) and a cam (201 c-2), the rotating head (201 c-1) and the cam (201 c-2) are both positioned between the rotating disk (201 a) and the fixed block (201 b), the rotating head (201 c-1) moves in the limiting groove (201 a-1), and the cam (201 c-2) is fixedly connected with the rotating head (201 c-1).

5. A machine tool with rotary indexing disk according to claim 4, wherein: the side surface of the fixed block (201 b) is further provided with a movable hole (201 b-2), the axial direction of the movable hole (201 b-2) is perpendicular to the axial direction of the second hinge hole (201 b-1), the middle part of the movable element (201 d) is rod-shaped, one end of the rod is provided with a first limiting head (201 d-1), the other end of the rod is provided with a second limiting head (201 d-2) and a third limiting head (201 d-3), the movable element (201 d) penetrates through the movable hole (201 b-2), the first limiting head (201 d-1) is located on one side of the fixed block (201 b), the second limiting head (201 d-2) and the third limiting head (201 d-3) are located on the other side of the fixed block (201 b), the rod between the first limiting head (201 d-1) and the fixed block (201 b) is further sleeved with an elastic element (T), the second limiting head (201 d-2) is abutted against the cam (201 c-2).

6. A machine tool with rotary indexing disk according to claim 5, wherein: the clamping assembly (202) comprises a chuck shell (202 a), a chuck cover (202 b), a first transmission piece (202 c), a second transmission piece (202 d), a third transmission piece (202 e) and a clamping jaw (202 f), the chuck shell (202 a) is a cylindrical structure with two open ends, one end of the chuck shell (202 a) is provided with a second flange (202 a-1), one end of the chuck cover (202 b) is provided with a circular platform (202 b-1), the circular platform (202 b-1) is provided with a third flange (202 b-2), the second flange (202 a-1) is matched and connected with the third flange (202 b-2), the other end of the chuck shell (202 a) is provided with a fourth flange (202 a-2), the first flange (201 a-2) is in fit connection with the fourth flange (202 a-2).

7. A machine tool with rotary indexing disk according to claim 6, wherein: the middle of the first transmission piece (202 c) is a bevel gear, one end of the bevel gear is provided with an operation hole (202 c-1), the other end of the bevel gear is provided with a hinge column (202 c-2), a plurality of round holes (202 a-3) are uniformly distributed on the cylindrical surface of the chuck shell (202 a), one surface of the round platform (202 b-1) is provided with a hollow cylinder, a plurality of third hinge holes (202 b-3) are uniformly distributed on the hollow cylinder, one end of the operation hole (202 c-1) of the first transmission piece (202 c) is arranged in the round hole (202 a-3), and the hinge column (202 c-2) is connected with the third hinge holes (202 b-3) in a matching mode.

8. A machine tool with rotary indexing disk according to claim 7 wherein: the second transmission piece (202 d) is of a sheet-shaped circular ring structure, one side of the circular ring is provided with a circle of helical gears (202 d-1), the other side of the circular ring is provided with a circle of first straight gears (202 d-2), the second transmission piece (202 d) is installed in the chuck shell (202 a), and the helical gears (202 d-1) are meshed with the bevel gears on the first transmission piece (202 c).

9. A machine tool with rotary indexing disk according to claim 8, wherein: the chuck cover (202 b) is further provided with a plurality of connecting holes (202 b-4) around the axis, a third transmission piece (202 e) is installed in the connecting holes (202 b-4), one end of the third transmission piece (202 e) is provided with a second straight gear (202 e-1), the second straight gear (202 e-1) is meshed with the first straight gear (202 d-2), the clamping jaw (202 f) is of a folded plate structure, one end of the folded plate is fixedly connected to the other end of the third transmission piece (202 e), the other end of the folded plate is provided with a fixing column (202 f-1), and the axial direction of the fixing column (202 f-1) is parallel to the axial direction of the chuck.

Technical Field

The invention relates to the field of machine tool chucks, in particular to a machine tool with a rotary dividing disc.

Background

The indexing disk is a machine tool accessory that holds a workpiece on a chuck or between two points and rotates, indexes and positions it. The indexing disc as a universal machine tool accessory mainly comprises a clamping part, an indexing and positioning part and a transmission part. The index plate is mainly used for milling machines, drilling machines and surface grinding machines, and can be placed on a platform for benches to mark. However, the structure of a general indexing disc is too complex, and the clamping structure of the indexing disc is similar to that of a general chuck, so that the moving space of the clamping jaws is limited, the indexing disc cannot be well adapted to workpiece materials of various sizes, and parts are complex to replace and difficult to maintain. Therefore, there is a need for a indexing plate that can be applied to a machine tool well, and that can be applied to materials of various diameters well, improve the efficiency of use of the machine tool, facilitate replacement of parts, and save a certain cost.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made in view of the above and/or other problems with existing machine tool chucks.

Therefore, the invention aims to solve the problem that a machine tool with a rotary indexing disc is needed, and the problems that the existing indexing disc is poor in adaptability to different materials and parts are not easy to replace are solved.

In order to solve the technical problem, the invention provides the following technical scheme that the machine tool with the rotary index plate comprises a fixing unit, a rotary index plate and a rotary indexing plate, wherein the fixing unit comprises a machine tool and a fixing frame arranged on the machine tool; and the operation unit is arranged on the fixed frame and comprises an indexing component and a clamping component.

As a preferable aspect of the machine tool with a rotary index plate according to the present invention, wherein: the lathe includes workstation and cutter, the workstation is the right angle structure, the cutter is installed on an edge in the right angle, the mount is installed on another edge, the mount with be equipped with operating space between the workstation.

As a preferable aspect of the machine tool with a rotary index plate according to the present invention, wherein: the indexing assembly is fixedly connected with the clamping assembly, the outer portion of the indexing assembly is cylindrical, the indexing assembly comprises a rotating disk, a fixed block, an operating rod and a moving part, a circular ring structure is arranged in the middle of the fixed frame, and the rotating disk is installed in the circular ring structure.

As a preferable aspect of the machine tool with a rotary index plate according to the present invention, wherein: the rotary disc is characterized in that a limiting groove is formed in the middle of one surface of the rotary disc, the middle of the limiting groove is a regular polygon, a straight groove extends out of each vertex of the regular polygon along the radial direction of the rotary disc, and a first flange is arranged on the edge of the rotary disc.

As a preferable aspect of the machine tool with a rotary index plate according to the present invention, wherein: still be equipped with first hinge hole on the rotary disk, the both ends of fixed block with mount fixed connection, the fixed block middle part is equipped with the second hinge hole, the one end of action bars is passed the second hinge hole and with first hinge hole is articulated, still be equipped with on the action bars and rotate head and cam, it all is located to rotate head and cam between rotary disk and the fixed block, it is in to rotate the head the activity in the spacing groove, the cam with rotate first fixed connection.

As a preferable aspect of the machine tool with a rotary index plate according to the present invention, wherein: the side of fixed block still is equipped with the movable hole, the axial of movable hole with the axial verticality of second hinge hole, the moving part middle part is shaft-like, and the one end of pole is equipped with first spacing head, and the other end is equipped with second spacing head, third spacing head, the moving part passes the movable hole, first spacing head is located one side of fixed block, second spacing head, third spacing head are located the opposite side of fixed block, first spacing head with it is equipped with the elastic component still to overlap on the pole between the fixed block, second spacing head with the cam offsets.

As a preferable aspect of the machine tool with a rotary index plate according to the present invention, wherein: the centre gripping subassembly includes chuck shell, chuck lid, first transmission piece, second transmission piece, third transmission piece, clamping jaw, the chuck shell is both ends open-ended cylinder structure, the one end of chuck shell is equipped with the second flange, the one end of chuck lid is equipped with circular platform, be equipped with the third flange on the circular platform, the second flange with the cooperation of third flange is connected, the other end of chuck shell is equipped with the fourth flange, first flange with the cooperation of fourth flange is connected.

As a preferable aspect of the machine tool with a rotary index plate according to the present invention, wherein: the middle of the first transmission piece is a bevel gear, one end of the bevel gear is provided with an operation hole, the other end of the bevel gear is provided with a hinge post, a plurality of round holes are uniformly distributed on the cylindrical surface of the chuck shell, one surface of the circular platform is provided with a hollow cylinder, a plurality of third hinge holes are uniformly distributed on the hollow cylinder, one end of the operation hole in the first transmission piece is arranged in the round hole, and the hinge post is in fit connection with the third hinge holes.

As a preferable aspect of the machine tool with a rotary index plate according to the present invention, wherein: the second transmission part is of a sheet circular ring structure, one side of the circular ring is provided with a circle of helical gear, the other side of the circular ring is provided with a circle of first straight gear, the second transmission part is installed in the chuck shell, and the helical gear is meshed with the bevel gear on the first transmission part.

As a preferable aspect of the machine tool with a rotary index plate according to the present invention, wherein: the chuck is covered and still is equipped with a plurality of connecting holes around the axle center, the third driving medium is installed in the connecting hole, the one end of third driving medium is equipped with the second straight-teeth gear, the second straight-teeth gear with first straight-teeth gear intermeshing, the clamping jaw is the folded plate structure, and the one end fixed connection of folded plate is in the other end of third driving medium, the other end of folded plate are equipped with the fixed column, the axial and the chuck axial direction parallel of fixed column.

The invention has the beneficial effects that: the indexing assembly adopted by the invention has a simple structure and is easy to operate, the whole indexing disc can be driven to rotate by rotating the operating rod, and the indexing assembly and the clamping assembly can be replaced, so that different indexing requirements can be met; the clamping assembly can fixedly clamp the cylindrical material, the clamping jaws synchronously rotate, and the clamped material can be automatically centered; meanwhile, the clamping jaws are convenient to replace, and the clamping jaws with different sizes can adapt to materials with different diameters.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced 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 based on these drawings without inventive exercise. Wherein:

fig. 1 is a schematic view of the overall assembly of a machine tool with a rotary indexing disk.

Figure 2 is a schematic view of the overall assembly of the operating components of the machine tool with the rotary indexing disk.

Figure 3 is an exploded view of the indexing assembly of the machine tool with the rotating indexing disk.

Fig. 4 is an exploded view of the clamping assembly of the machine tool with the rotating indexing disk.

In the figure: a fixing unit 100; a machine tool 101; a fixed frame 102; an operation unit 200; an indexing assembly 201; a clamping assembly 202; a table 101 a; a cutter 101 b; an operating space R; the rotating disk 201 a; a fixed block 201 b; an operating lever 201 c; a movable member 201 d; the ring structure 102 a; a limiting groove 201 a-1; a first flange 201 a-2; the first hinge hole 201 a-3; the second hinge hole 201 b-1; the rotating head 201 c-1; cam 201 c-2; the movable hole 201 b-2; a first stopper 201 d-1; a second stopper 201 d-2; a third stopper 201 d-3; an elastic member T; a chuck housing 202 a; a chuck cover 202 b; the first transmission member 202 c; second transmission member 202 d; third transmission member 202 e; a clamping jaw 202 f; second flange 202 a-1; circular platform 202 b-1; third flange 202 b-2; third hinge aperture 202 b-3; fourth flange 202 a-2; access hole 202 c-1; hinge post 202 c-2; circular aperture 202 a-3; helical gear 202 d-1; a first straight gear 202 d-2; connection hole 202 b-4; a second spur gear 202 e-1; fixing column 202 f-1.

Detailed Description

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

Example 1

Referring to fig. 1 to 3, a first embodiment of the present invention provides a machine tool with a rotary index plate, including: a fixing unit 100 including a machine tool 101 and a fixing frame 102 mounted on the machine tool 101; and an operation unit 200, which is installed on the fixing frame 102, and includes an index assembly 201 and a clamping assembly 202.

In the fixing unit 100, the machine tool 101 includes a table 101a and a tool 101b, the table 101a is a right-angle structure, the tool 101b is installed on one side in the right angle, the fixing frame 102 is installed on the other side, and an operation space R is provided between the fixing frame 102 and the table 101a, so that a certain operation space R is reserved for operating the indexing assembly 201. The cutter 101b is a milling cutter, and the cutter 101b is fixed on a slide rail so as to be capable of sliding up and down.

In the operation unit 200, the indexing assembly 201 is fixedly connected with the clamping assembly 202, and the outer portion of the indexing assembly 201 is cylindrical, and the clamping assembly can be driven to rotate by the rotation of the indexing assembly 201.

Specifically, the indexing assembly 201 includes a rotating disc 201a, a fixed block 201b, an operating rod 201c and a movable element 201 d. The fixed frame 102 is provided with a circular ring structure 102a in the middle, the rotating disc 201a is installed in the circular ring structure 102a, and the rotating disc 201a rotates in the circular ring structure. The middle of one surface of the rotating disc 201a is provided with a limiting groove 201a-1, the middle of the limiting groove 201a-1 is a regular polygon, each vertex of the regular polygon extends out of a straight groove along the radial direction of the rotating disc 201a, and the edge of the rotating disc 201a is provided with a first flange 201 a-2. In the embodiment, the middle part of the limiting groove 201a-1 in the figure is a regular pentagon, straight grooves at the vertex of the pentagon are distributed divergently, and a first hinge hole 201a-3 is further arranged between two straight grooves.

Further, the fixed block 201b is in a straight plate shape, two ends of the fixed block 201b are fixedly connected with the fixed frame 102, a second hinge hole 201b-1 is formed in the middle of the fixed block 201b, one end of the operating rod 201c is a rotating handle, the middle of the other end of the operating rod 201c is fixedly connected with a rotating head 201c-1 and a cam 201c-2, the other end of the operating rod 201c penetrates through the second hinge hole 201b-1, the end of the operating rod is hinged to the first hinge hole 201a-3, and the rotating head 201c-1 and the cam 201c-2 are located between the rotating disc 201a and the fixed block 201 b. The shape of the rotating head 201c-1 is not fixed, one end of the rotating head is connected with the operating rod and rotates along with the operating rod 201c, and the other end of the rotating head is provided with a bulge parallel to the operating rod 201c, and the bulge is positioned in the limiting groove 201 a-1; the end of the operating rod 201c passing through the cam 201c-2 is rounded, and the opposite arc side of the rounded corner is located on the same side as the projection of the rotating head 201 c-1. When the operating rod 201c is rotated to rotate the handle, the rotating head 201c-1 moves in the limiting groove 201a-1, the moving track goes from one straight groove to the other straight groove, and the rotating disc 201a rotates under the pushing of the rotating head 201 c-1.

Still further, the side of the fixed block 201b is further provided with a movable hole 201b-2, the axial direction of the movable hole 201b-2 is perpendicular to the axial direction of the second hinge hole 201b-1, the middle of the movable member 201d is rod-shaped, one end of the rod is provided with a first limiting head 201d-1, the other end of the rod is provided with a second limiting head 201d-2 and a third limiting head 201d-3, the movable member 201d penetrates through the movable hole 201b-2, the first limiting head 201d-1 is located on one side of the fixed block 201b, the second limiting head 201d-2 and the third limiting head 201d-3 are located on the other side of the fixed block 201b, an elastic member T is further sleeved on the rod between the first limiting head 201d-1 and the fixed block 201b, and the second limiting head 201d-2 abuts against the cam 201 c-2. The elastic element T is a compression spring, two ends of the spring are respectively abutted to the first limiting head 201d-1 and the fixing block 201b, the first limiting head 201d-1 is only contacted with the spring, the second limiting head 201d-2 and the third limiting head 201d-3 are respectively provided with an extending part and are positioned in the limiting groove 201a-1, the extending part of the second limiting head 201d-2 is contacted with the cam 201c-2, and the third limiting head 201d-3 moves in a straight groove extending out of the limiting groove 201 a-1.

In this embodiment, the indexing assembly 201 operates in the following manner: rotating the rotating handle of the operating rod 201c to drive the rotating head 201c-1 to rotate in the limiting groove 201a-1 and push the whole rotating disc 201a to rotate; at the same time, the cam 201c-2 rotates and pushes the second stopper 201d-2, and the third stopper 201d-3 moves therewith. When the rotating head 201c-1 is positioned in the straight groove in the limiting groove 201a-1, the third limiting head 201d-3 contracts towards the middle of the limiting groove 201a-1 under the action of the spring, so that the rotating disc 201a can rotate; when the rotating head 201c-1 is located on the side line of the polygonal groove, the cam 201c-2 pushes the second limiting head 201d-2, so that the third limiting head 201d-3 moves towards the straight groove, at this time, under the action of the spring, the rotating head 201c-1 is fastened, and the third limiting head 201d-3 is always located in the straight groove, so that the rotating disc 201a cannot easily rotate under the action of external force. In addition, by changing the shapes of different limiting grooves in the rotating disc 201a, the angle of each rotation of the rotating disc can be changed, and different indexing requirements are realized.

Example 2

Referring to fig. 4, a second embodiment of the present invention is based on the previous embodiment, and is different from the previous embodiment in that: the operating unit 200 further comprises a clamping assembly 202 for clamping the workpiece.

Specifically, the clamping assembly 202 includes a chuck housing 202a, a chuck cover 202b, a first transmission member 202c, a second transmission member 202d, a third transmission member 202e, and a clamping jaw 202 f. The chuck housing 202a is a cylindrical structure with openings at two ends, and a second flange 202a-1 is arranged at one end of the chuck housing 202 a; one end of the chuck cover 202b is provided with a circular platform 202b-1, the circular platform 202b-1 is provided with a third flange 202b-2, the second flange 202a-1 is connected with the third flange 202b-2 in a matching mode, the other end of the chuck shell 202a is provided with a fourth flange 202a-2, the first flange 201a-2 is connected with the fourth flange 202a-2 in a matching mode, and the clamping assembly 202 is connected with the indexing assembly 201 through the connection of the first flange 201a-2 and the fourth flange 202 a-2.

Further, inside the clamping assembly 202, the middle part of the first transmission member 202c is a bevel gear, one end of the bevel gear is provided with an operation hole 202c-1, and the other end is provided with a hinge column 202 c-2; a plurality of round holes 202a-3 are uniformly distributed on the cylindrical surface of the chuck shell 202a, a hollow cylinder is axially arranged in the middle of one surface of the round platform 202b-1, a plurality of third hinge holes 202b-3 are uniformly distributed on the hollow cylinder, the third hinge holes 202b-3 are concentric with the round holes 202a-3, a first transmission piece 202c is arranged between the round holes 202a-3 and the third hinge holes 202b-3, one end of an operation hole 202c-1 of the first transmission piece 202c is arranged in the round hole 202a-3, and the hinge column 202c-2 is connected with the hinge holes 202b-2 in a matching manner.

Still further, the second transmission member 202d is a sheet-shaped circular ring structure, one side of the circular ring is provided with a circle of bevel gears 202d-1, the other side of the circular ring is provided with a circle of first straight gears 202d-2, the second transmission member 202d is installed in the chuck housing 202a, and the bevel gears 202d-1 and the bevel gears on the first transmission member 202c are meshed with each other.

In addition, a plurality of connecting holes 202b-4 are further formed in the chuck cover 202b around the axis, the third transmission piece 202e is installed in the connecting holes 202b-4, one end of the third transmission piece 202e is provided with a second spur gear 202e-1, the other end of the third transmission piece 202e is a platform for fixing, the platform is located outside the chuck, the second spur gear 202e-1 is meshed with the first spur gear 202d-2, the clamping jaw 202f is of a folded plate structure, one end of the folded plate is fixedly connected to the other end of the third transmission piece 202e, the other end of the folded plate is provided with a fixing column 202f-1, and the axial direction of the fixing column 202f-1 is parallel to the axial direction of the chuck.

In this embodiment, the first transmission member 202c is screwed to control the clamping jaws 202f to rotate inward or outward, and since the clamping jaws 202f of the present invention are rotary-type clamping, and at least 3 clamping jaws 202f are provided, the force applied to each clamping jaw is relatively reduced when the number of the clamping jaws 202f is increased, and the clamping stability can be improved to a certain extent. When the bar is processed, the clamping jaws are kept in an outward expansion state, the bar is placed in the middle of the clamping jaws, and the clamping jaws 202f are operated to rotate and fold inwards so as to clamp the bar; when processing tubular product, at first keep clamping jaw 202f to draw in inwards, with the outside of clamping jaw 202f cover tubular product, thereby clamping jaw 202f outwards expands during the operation, thereby supports fixed tubular product from tubular product inside, also can adopt the mode of outside centre gripping, nevertheless probably can make tubular product take place the deformation of certain degree when the dynamics is great.

The indexing assembly adopted by the invention has a simple structure and is easy to operate, the whole indexing disc can be driven to rotate by rotating the operating rod, and the indexing assembly and the clamping assembly can be replaced, so that different indexing requirements can be met; the clamping assembly can fixedly clamp the cylindrical material, the clamping jaws synchronously rotate, and the clamped material can be automatically centered; meanwhile, the clamping jaws are convenient to replace, and the clamping jaws with different sizes can adapt to materials with different diameters.