CN107775824B - A circular arc line machine and processing method thereof - Google Patents

Abstract

The invention discloses an arc line machine and a processing method thereof, wherein the arc line machine comprises a workbench, a mounting rack and a bracket, the mounting rack is arranged on two sides of the workbench, a first sliding seat is arranged on the mounting rack on one side, a second sliding seat is arranged on the bracket, the first sliding seat is rotationally connected with the second sliding seat, a sliding component for driving the first sliding seat to slide is connected onto the first sliding seat, a polishing component is arranged on the bracket and slides along the length direction of the bracket, a sliding rod which is arranged on the mounting rack on the other side and is perpendicular to the mounting rack is provided with a first base which slides along the length direction of the bracket, a second base is arranged on the bracket and slides along the length direction of the bracket, the first base is rotationally connected with the second base, a first limiting part for limiting the sliding distance of the second base is arranged on the bracket, and a second limiting part for limiting the rotation of the bracket is arranged on the mounting rack on one side. The support drives the moving track of the polishing assembly to form an arc shape consistent with the arc groove shape of the stone polishing, and the operation is convenient and labor-saving.

Description

A circular arc line machine and processing method thereof

Technical Field

The invention relates to the field of stone processing equipment, and in particular to an arc line machine and a processing method thereof.

Background technique

Stone products are increasingly used in public buildings and home decoration due to their natural physical properties, stable chemical properties and beautiful appearance. In the process of stone processing, most of the stones need to be polished.

One grinding method for stone in the prior art is to cut an arc-shaped groove on the stone. The operation process includes the processes of profiling, grinding and polishing. The profiling operation refers to using an engraving machine to carve an arc-shaped groove on the stone; the grinding process is that the staff uses a grinder to grind and shape the arc-shaped groove, and finally the staff manually grinds the shaped groove to make it smooth.

The labor intensity of the workers is high during the entire operation process, so there is an urgent need for a device that can integrate profiling, grinding and polishing to reduce the labor intensity of the workers.

Summary of the invention

In view of the deficiencies in the prior art, an object of the present invention is to provide an arc line machine, which can reduce the labor intensity of workers to a certain extent when used for stone grinding operations.

The above technical objectives of the present invention are achieved through the following technical solutions:

A circular arc line machine comprises a workbench, a mounting frame, and a bracket. The mounting frames are arranged on both sides of the workbench, a first slide that slides along the length direction of the mounting frame on one side is arranged on the mounting frame on one side, a second slide for the bracket to slide is arranged on the bracket, the first slide is rotatably connected with the second slide, and a sliding assembly that drives the first slide to slide is connected to the first slide, a grinding assembly is arranged on the bracket and slides along the length direction of the bracket, a sliding rod perpendicular to the mounting frame is arranged on the mounting frame on the other side, a first base that slides along the length direction of the bracket is arranged on the sliding rod, a second base that slides along the length direction of the bracket is slid on the bracket, the first base is rotatably connected with the second base, a first limiter that limits the sliding distance of the second base is arranged on the bracket, and a second limiter that limits the rotation of the bracket is arranged on the mounting frame on one side.

Through the above technical scheme, when the stone is being polished, the center of the circular arc groove of the stone is first found, and then the sliding component drives the bracket to slide along the length direction of the mounting frame on one side. During the sliding process, the other side of the bracket rotates along the center of the circle. During the rotation, the support frame slides along the second slide seat, and the running trajectory of the polishing component on the bracket is an arc, so the stone polishing operation can be realized. The grinder can be replaced during polishing, and a carving tool is used for profiling, a grinding tool is used for grinding, and a polishing tool is used for polishing. The entire operation has a high degree of automation and low labor intensity for staff.

The present invention is further configured as follows: a support frame parallel to the length direction of the mounting frame is arranged near the center of the workbench, a group of parallel guide rails for the first base to slide are arranged perpendicular to the support frame and the mounting frame on the other side, a first screw rod is arranged between the guide rails, a first nut is sleeved on the first screw rod, one end of the first screw rod is rotatably connected to the first drive motor, a first bearing is arranged on the first base, a second bearing is connected to the inner ring of the first bearing, a fixing block is arranged on the side of the second base close to the bracket, and a first slide rail for the second base to slide is arranged on the bottom wall of the bracket.

Through the above technical solution, when the center of the circle is determined, the second limiting member limits one end of the bracket to not rotate, and then the first motor drives the first screw to rotate and drive the first base to slide to the center of the circular arc groove polished by the stone, and then the first limiting member is used to limit the position of the first base, which is easy to operate.

The present invention is further configured as follows: the first limit member includes a positioning block fixedly arranged on the second base and sliding along the first slide rail, the positioning block is provided with a slide groove for the first slide rail to slide, the positioning block is provided with a mounting hole perpendicular to the slide groove, the mounting hole includes a flaring section and a shrinking section, a locking block is provided in the flaring section, an arcuate surface that fits the first slide rail is provided on the locking block, the flaring section is connected with the slide groove at the location of the arcuate surface, a positioning hole connected with the shrinking section is provided in the locking block, and a limiting bolt is provided in the shrinking section, and when the limiting bolt moves in the direction of the positioning hole, it drives the locking block to move in the direction of the limiting bolt so that the arcuate surface presses the first slide rail tightly.

Through the above technical solution, when used to limit the position of the second base, the limit bolt moves in the direction of the mounting hole. At this time, the limit block moves in the direction of the limit bolt under the action of the limit bolt, and the arc surface moves in the direction of the first slide rail to press the first slide rail. At this time, the positioning block remains stationary, and the second base is difficult to slide, and remains fixed at the center of the circle.

The present invention is further configured as follows: a second slide rail is arranged on one side mounting frame, the sliding assembly includes a first slide seat sliding along the second slide rail, a first rack parallel to the length direction of the second slide rail is also arranged on one side mounting frame, a first gear meshing with the first rack is arranged on the first slide seat, and a second motor driving the first gear to rotate along the first rack is connected to the first gear.

Through the above technical solution, when the bracket slides, the second motor rotates the first gear to move one end of the bracket along the first rack and move along the mounting frame, which has a simple structure and is easy to operate.

The present invention is further configured as follows: a second bearing is arranged on the first slide seat, the second slide seat is connected to the inner ring of the second bearing, and a sliding track for the second slide seat to slide is arranged on the end portion close to one side of the bracket.

Through the above technical solution, the second bearing can be arranged to rotate when the bracket moves to cooperate with the movement of the bracket, and at the same time the other end of the bracket is rotatably connected to the first bearing to achieve normal operation of the bracket.

The present invention is further configured as follows: the second limiting member is configured as a cylinder or a pin installed on the bracket, and the second sliding seat is provided with a limiting hole for the bracket to stop rotating when the cylinder shaft or the pin is inserted.

Through the above technical solution, the second limiting member is configured as a cylinder or a pin inserted into the limiting hole, so that positioning is simple and convenient.

The present invention is further configured as follows: the grinding assembly includes a mounting seat arranged on the bracket, a lifting seat is slidably arranged along the vertical direction, the mounting seat is provided with a second screw rod rotatably connected to the mounting seat, a second nut sleeved on the second screw rod, and a lifting motor for driving the second screw rod to rotate, the lifting seat is fixed on the second nut, the lifting motor is fixedly arranged on the lifting seat, and a tool seat is arranged on the end of the lifting seat close to the workbench, and a tool is detachably connected to the tool seat.

Through the above technical solution, when the grinding assembly completes the up and down adjustment, the lifting motor rotates to drive the second screw to rotate to drive the mounting seat to move up and down, thus completing the up and down movement of the grinding knife.

The present invention is further configured as follows: the bracket is provided with a third slide rail for the mounting seat to slide, the bracket is also provided with a second drive motor, the bracket is provided with a second rack parallel to the third slide rail, and the second drive motor shaft is provided with a second gear meshing with the second rack.

Through the above technical solution, the position of the grinding assembly needs to be adjusted due to the different structural shapes of different stones, so the second drive motor drives the bevel gear one to rotate, which drives the bevel gear two to rotate. The rotation of bevel gear two drives the bevel gear one to rotate. The rotation of bevel gear one drives the second connecting rod to rotate. The rotation of the second connecting rod drives the second gear to move along the second rack to drive the mounting seat to complete the movement of the sharpening assembly, which is easy to operate.

Another object of the present invention is a method for processing a circular arc line machine, comprising the following processing steps:

Step 1: Determine the center of the circle. Place the stone on the workbench, insert the cylinder shaft or pin into the limit hole to limit the position of the bracket, and the first drive motor drives the first base to slide until the first base reaches the center of the circular arc groove of the stone. The first drive motor stops rotating, and the first limit defines the position of the second base, and the center of the circle is determined;

Step 2: Grinding, separate the cylinder shaft or pin from the limit hole, lift the motor to adjust the grinding assembly to a suitable height, and the second motor drives one end of the bracket to slide along one side of the mounting frame.

Through the above technical solution, the center of the circle is firstly found, and then the bracket is rotated so that the tool forms a moving direction consistent with the arc angle of the stone grinding, which is easy to operate.

In summary, the beneficial effects of the present invention compared with the prior art are as follows:

The arc line machine in this application document is used to process stone by directly placing the stone on the workbench, and then one end of the bracket moves around the center of the arc groove of the stone, and the other end of the bracket slides along a mounting frame on one side. The grinding component on the bracket forms an arc-shaped trajectory to grind the stone. The operation is highly automated and the labor intensity of the staff is low.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is an overall structural diagram of Embodiment 1;

FIG2 is a structural diagram of the first base and the second base of Example 1;

FIG3 is a structural diagram of a first position-limiting member in accordance with Embodiment 1;

FIG4 is a structural diagram of the first slide and the second slide of Embodiment 1;

FIG5 is a structural diagram of a pin of a second position-limiting member of Example 1;

FIG6 is a mounting structure of the grinding assembly of Example 1;

FIG. 7 is a structural diagram of the grinding assembly of Example 1.

Figure numerals: 1, workbench; 11, mounting frame; 2, bracket; 21, sliding assembly; 211, second slide rail; 212, first slide seat; 213, second slide seat; 214, first rack; 215, first gear; 2151, first connecting rod; 2152, first bevel gear; 2153, second bevel gear; 2154, second motor; 216, second bearing; 217, sliding rail; 218, second stopper; 2181, cylinder; 2182, pin; 2183, stopper hole; 3, grinding assembly; 31, third slide rail; 32, second drive motor; 321, bevel gear 1; 33, second rack; 34, second gear; 341, second connecting rod; 3 42. Bevel gear 2; 35. Mounting seat; 351. Lifting seat; 352. Second screw rod; 353. Lifting motor; 354. Second nut; 36. Tool seat; 361. Tool; 521. Guide rail; 5301. First base; 5302. Second base; 531. First nut; 532. First drive motor; 533. First screw rod; 534. First bearing; 55. Fixing block; 551. First slide rail; 56. First limiting member; 560. Positioning block; 561. Slide groove; 562. Mounting hole; 5621. Expanding section; 5622. Shrinking section; 5623. Locking block; 5624. Positioning hole; 5625. Arc surface; 563. Limiting bolt.

Detailed ways

The present invention is further described in detail below in conjunction with embodiments.

Example 1

A circular arc line machine, as shown in FIGS. 1 and 2, comprises a workbench 1, a mounting frame 11, and a bracket 2, wherein the mounting frame 11 is arranged on both sides of the workbench 1, a first slide 212 is arranged on one side of the mounting frame 11 to slide along the length direction of the mounting frame 11, a second slide 213 for the bracket 2 to slide is arranged on the bracket 2, the first slide 212 is rotatably connected to the second slide 213, and a sliding assembly 21 driving the first slide 212 to slide is connected to the first slide 212, and a first slide 212 is arranged on the bracket 2 and along the length direction of the bracket 2. A grinding assembly 3 is provided on the side for sliding, a sliding rod perpendicular to the mounting frame 11 is provided on the mounting frame 11 on the other side, a first base 5301 which slides along the length direction of the bracket 2 is provided on the sliding rod, a second base 5302 which slides along the length direction of the bracket 2 is provided on the bracket 2, the first base 5301 is rotatably connected with the second base 5302, and a first limiting member 56 for limiting the sliding distance of the second base 5302 is provided on the bracket 2, and a second limiting member 218 for limiting the rotation of the bracket 2 is provided on the mounting frame 11 on one side.

In the process of stone processing, the stone is first placed on the workbench 1, and then the second limit piece 218 is used to limit one end of the bracket 2 from rotating, and the first slide 212 is moved to the center of the circular arc groove where the grinding assembly 3 is aligned with the stone for grinding. The second limit piece 218 is used to limit the position of the first slide 212 so that it no longer moves. At this time, the sliding assembly 21 drives one end of the bracket 2 to move along the length direction of the mounting frame 11. The bracket 2 rotates along the center of the circle during the movement, and the end of the bracket 2 close to the second slide 213 slides along the second slide 213 during the rotation. The moving trajectory of the bracket 2 is an arc, and the running trajectory of the sharpening assembly 3 on the bracket 2 is also an arc. The arc-shaped trajectory can also complete the operation of profiling, grinding or polishing the stone. As shown in Figure 2, a support frame 52 parallel to the length direction of the mounting frame 11 is provided near the center of the workbench 1, a sliding rod is arranged to be perpendicular to the support frame 52 and a group of parallel guide rails 521 arranged on the mounting frame 11 on the other side for the first base 5301 to slide, a first screw rod 533 is arranged between the guide rails 521, a first nut 531 is sleeved on the first screw rod 533, one end of the first screw rod 533 is rotatably connected to the first drive motor 532, a first bearing 534 is arranged on the first base 5301, a second base 5302 is connected to the inner ring of the first bearing, a fixing block 55 is arranged on the side of the second base 5302 close to the bracket 2, and a first slide rail 551 for the fixing block 55 to slide is arranged on the bottom wall of the bracket 2.

The process of determining the center of the circle: the bracket 2 limited by the second limit piece 218 does not move, the first drive motor 532 drives the first screw rod 533 to rotate, and then the first base 5301 slides along the first screw rod 533. In this process, the second base 5302 slides along the first slide rail 551. When the first base 5301 and the second base 5302 move to the center of the stone, the first limit piece 56 is used to limit the position of the second base 5302. The position of the second base 5302 remains unchanged, and the position of the center of the circle remains fixed.

As shown in FIG3 , the first limit member 56 includes a positioning block 560 fixedly arranged on the second base 5302 and sliding along the first slide rail 551. The positioning block 560 is provided with a slide groove 561 for the first slide rail 551 to slide. The positioning block 560 is provided with a mounting hole 562 perpendicular to the slide groove 561. The mounting hole 562 includes a flaring section 5621 and a shrinking section 5622. A locking block 5623 is provided in the flaring section 5621. The locking block 5623 is provided with a locking block 5623. An arc surface 5625 is provided to fit with the guide rail 521, and the expanding section 5621 is connected with the slide groove 561 at the location of the arc surface 5625. A mounting hole 562 connected with the shrinking section 5622 is provided in the locking block 5623, and a limiting bolt 563 is provided in the shrinking section 5622. When the limiting bolt 563 moves toward the positioning hole 5624, it drives the locking block 5623 to move toward the limiting bolt 563 so that the arc surface 5625 presses the guide rail 521.

The movement and fixing process of the second base 5302: in the process of determining the center of the circle, the second base 5302 moves along the first slide rail 551, and the first base 5301 slides along the guide rail 521. When it moves to the center of the arc of the stone grinding, the limiting bolt 563 moves toward the direction of the mounting hole 562. At this time, the locking block 5623 moves toward the direction of the limiting bolt 563 under the action of the limiting bolt 563, and the arc surface 5625 will move toward the direction of the first slide rail 551 to press the first slide rail 551, so that the second base 5302 will be difficult to move again, and the position of the center of the circle will remain fixed.

As shown in Figure 4, a second slide rail 211 is provided on one side mounting frame 11, and the sliding assembly 21 includes a first slide seat 212 that slides along the second slide rail 211. A first rack 214 parallel to the length direction of the second slide rail 211 is also provided on one side mounting frame 11, and a first gear 215 meshing with the first rack 214 is provided on the first slide seat 212. A first connecting rod 2151 is fixedly provided on the first gear 215, and a first bevel gear 2152 is connected to the first connecting rod 2151. A second motor 2154 is provided on one side mounting frame 11, and a second bevel gear 2153 meshing with the first bevel gear 2152 is connected to the second motor shaft.

As shown in FIG. 4 , a second bearing 216 is disposed on the first slide 212 , and a second slide 213 is connected to the inner ring of the second bearing. A sliding track 217 for the second slide 213 to slide is disposed on the end of the bracket 2 near one side.

As shown in FIGS. 1 and 5 , the second limiting member 218 is configured as a cylinder 2181 or a pin 2182 mounted on the bracket 2 , and the second slide seat 213 is provided with a limiting hole 2183 for the bracket 2 to stop rotating when the cylinder shaft or the pin 2182 is inserted.

The sliding and positioning process of the bracket 2: when the position of the center of the circle is determined, when the bracket 2 slides, the second motor 2154 rotates to drive the second bevel gear 2153 to rotate, the second bevel gear 2153 drives the first bevel gear 2152 to rotate, the first bevel gear 2152 rotates to drive the first connecting rod 2151 to rotate, the first connecting rod 2151 drives the first gear 215 to rotate, and when the first gear 215 rotates, it moves along the first rack 214, and one side of the bracket 2 is driven to move along the mounting frame 11.

When the bracket 2 slides along the mounting frame 11 on one side, if the bracket 2 is fixedly connected to the second slide seat 213, it is difficult for the bracket 2 to rotate along the center of the circle, so the bracket 2 is set to slide along the second slide seat 213, and the second slide seat 213 is driven to rotate during the sliding process of the bracket 2.

Secondly, when determining the center of the circle, to limit the bracket 2 from rotating, the cylinder shaft or the pin 2182 is inserted into the limiting hole 2183, and the bracket 2 will not rotate.

As shown in Figures 6 and 7, the grinding assembly 3 includes a mounting seat 35 arranged on the bracket 2, a lifting seat 351 is slidably arranged in the vertical direction, the mounting seat 35 is provided with a second screw rod 352 rotatably connected to the mounting seat 35, a second nut 354 sleeved on the second screw rod 352, and a lifting motor 353 for driving the second screw rod 352 to rotate, the lifting seat 351 is fixed on the second nut 354, the lifting motor 353 is fixedly arranged on the lifting seat 351, and a tool seat 36 is arranged on the end of the lifting seat 351 close to the workbench 1, and a tool 361 is detachably connected to the tool seat 36.

As shown in Figure 6, the bracket 2 is provided with a third slide rail 31 for the mounting seat 35 to slide, the bracket 2 is also provided with a second drive motor 32, the second drive motor 32 is connected to a bevel gear 1 321, the bracket 2 is provided with a second rack 33 parallel to the third slide rail 31, the mounting seat 35 is provided with a second gear 34 meshing with the second rack 33, the second gear 34 is fixedly connected with a second connecting rod 341 passing through the mounting seat 35, and the second connecting rod 341 is provided with a bevel gear 2 342 meshing with the bevel gear 1 321.

Movement and lifting of the grinding assembly 3: When processing stones of different specifications, it can be achieved by changing the position of the tool 361, and when performing profiling, grinding or polishing operations, it is sufficient to replace the tool 361.

When the tool 361 is lifted or lowered, the lifting motor 353 rotates to drive the second screw rod 352 to rotate, and the second screw rod 352 drives the lifting seat 351 to move up and down to complete the lifting operation of the tool 361.

When the grinding assembly 3 moves, the second driving motor 32 drives the bevel gear 1 321 to rotate, driving the bevel gear 2 342 to rotate. The rotation of the bevel gear 2 342 drives the second connecting rod 341 to rotate. The rotation of the second connecting rod 341 drives the second gear 34 to move along the second gear 34. When the second gear 34 moves along the second rack 33, the process of the grinding assembly 3 moving along the bracket 2 is completed.

Example 2

A processing method for an arc line machine includes the following processing steps:

Step 1: Determine the center of the circle. Place the stone on the workbench 1. Use the cylinder shaft or the pin 2182 to insert into the limiting hole 2183 to limit the position of the bracket 2. The first drive motor 532 drives the first base 5301 to slide until the first base 5301 reaches the center of the circular arc groove of the stone. The first drive motor 532 stops rotating. The first limiting member 56 limits the position of the second base 5302, and the center of the circle is determined.

Step 2: Grinding, separate the cylinder shaft or pin 2182 from the limit hole 2183, the lifting motor 353 adjusts the grinding assembly 3 to a suitable height, and the second motor 2154 drives one end of the bracket 2 to slide along the side mounting frame 11. On the one hand, the bracket 11 slides along the length direction of the side mounting frame 11, and on the other hand, it slides along the second slide 213. At this time, the second slide 213 is driven to rotate, and the bracket 11 forms an arc-shaped moving trajectory, and the moving trajectory of the tool 361 is also an arc.

During the grinding process, the operations of profiling, grinding and polishing are realized by different cutters 361. First, after the profiling operation is completed, the cutter 361 is replaced for the grinding operation, and finally the cutter 361 is replaced for the polishing operation.

The above description is merely an exemplary embodiment of the present invention and is not intended to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims (6)

1. An arc line machine, which is characterized in that: the device comprises a workbench (1), a mounting frame (11) and a support (2), wherein the mounting frame (11) is arranged on two sides of the workbench (1), a first sliding seat (212) which slides along the length direction of the mounting frame (11) on one side is arranged on the mounting frame (11), a second sliding seat (213) which slides along the length direction of the support (2) is arranged on the support (2), the first sliding seat (212) is rotationally connected with the second sliding seat (213), a sliding component (21) which drives the first sliding seat (212) to slide is connected with the first sliding seat (212), a polishing component (3) is arranged on the support (2) and slides along the length direction of the support (2), a slide rod which is provided with a vertical mounting frame (11) on the other side is arranged on the mounting frame (11), a first base (5301) which slides along the length direction of the support (2) is arranged on the slide rod, a second base (5302) is arranged on the support (2) in a sliding manner, the first base (5301) is rotationally connected with the second base (5302), a limiting piece (56) which limits the second base (5302) is arranged on the support (2), and a limiting piece (218) which limits the limiting piece on one side of the first side (5302) of the limiting piece;

a support frame (52) parallel to the length direction of the mounting frame (11) is arranged near the center of the workbench (1), a sliding rod is arranged to be perpendicular to the support frame (52) and a group of parallel guide rails (521) for sliding of the first base (5301) are arranged on the mounting frame (11) on the other side, a first screw rod (533) is arranged between the guide rails (521), a first nut (531) is sleeved on the first screw rod (533), one end of the first screw rod (533) is rotationally connected with a first driving motor (532), a first bearing (534) is arranged on the first base (5301), a second bearing (216) is connected on an inner ring of the first bearing, a fixed block (55) is arranged on one side, close to the support frame (2), of the second base (5302), and a first sliding rail (551) for sliding of the second base (5302) is arranged on the bottom wall of the support frame (2).

The first limiting piece (56) comprises a positioning block (560) fixedly arranged on the second base (5302) and sliding along the first sliding rail (551), a sliding groove (561) for the first sliding rail (551) to slide is arranged on the positioning block (560), a mounting hole (562) perpendicular to the sliding groove (561) is arranged on the positioning block (560), the mounting hole (562) comprises a flaring section (5621) and a necking section (5622), a locking block (5623) is arranged in the flaring section (5621), an arc-shaped surface (5625) attached to the first sliding rail (551) is arranged on the locking block (5623), the flaring section (5621) is communicated with the sliding groove (561) at the position of the arc-shaped surface (5625), a positioning hole (5624) communicated with the necking section (5622) is arranged in the locking block (5623), and a limiting bolt (563) is arranged in the necking section (5622) and drives the limiting bolt (563) to move towards the positioning hole (5624) to enable the locking block (5623) to move towards the arc-shaped surface (5625) to be tightly pressed against the first sliding rail (551).

2. The arc machine of claim 1, wherein: be provided with second slide rail (211) on one side mounting bracket (11) slip subassembly (21) are including first slide (212) that slide along second slide rail (211), still be provided with on one side mounting bracket (11) with second slide rail (211) length direction parallel first rack (214), be provided with on first slide (212) with first rack (214) engaged first gear (215), be connected with on first gear (215) drive first gear (215) along first rack (214) pivoted second motor (2154).

3. The arc machine of claim 2, wherein: the first sliding seat (212) is provided with a second bearing (216), the inner ring of the second bearing is connected with a second sliding seat (213), and the end part of the bracket (2) close to one side is provided with a sliding rail (217) for sliding the second sliding seat (213).

4. The arc machine of claim 1, wherein: the second limiting part (218) is arranged to be an air cylinder (2181) or a pin (2182) arranged on the bracket (2), and a limiting hole (2183) for stopping rotation of the bracket (2) when the air cylinder (2181) shaft or the pin (2182) is inserted is formed in the second sliding seat (213).

5. The arc machine of claim 1, wherein: the polishing assembly (3) comprises a mounting seat (35) arranged on the support (2), a lifting seat (351) is arranged in a sliding mode along the vertical direction, a second screw rod (352) connected to the mounting seat (35) in a rotating mode is arranged on the mounting seat (35), a second nut (354) sleeved on the second screw rod (352) and used for driving the second screw rod (352) to rotate, a lifting motor (353) is arranged on the second nut (354), the lifting motor (353) is fixedly arranged on the lifting seat (351), a cutter seat (36) is arranged at the end portion, close to the workbench (1), of the lifting seat (351), and a cutter (361) is detachably connected to the cutter seat (36).

6. The arc machine of claim 5, wherein: the support (2) is provided with a third sliding rail (31) for sliding of the mounting seat (35), the support (2) is also provided with a second driving motor (32), the support (2) is provided with a second rack (33) parallel to the third sliding rail (31), and a second driving motor shaft is provided with a second gear (34) meshed with the second rack (33).