CN110816131A

CN110816131A - Multifunctional engraving machine

Info

Publication number: CN110816131A
Application number: CN201911316917.1A
Authority: CN
Inventors: 袁昌荣
Original assignee: HEFEI SIGNRIGHT NUMERICAL CONTROL EQUIPMENT CO Ltd
Current assignee: HEFEI SIGNRIGHT NUMERICAL CONTROL EQUIPMENT CO Ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-02-21
Anticipated expiration: 2039-12-19
Also published as: CN110816131B

Abstract

The invention relates to the technical field of engraving machines, in particular to a multifunctional engraving machine, which comprises a control mechanism and a fixed base, wherein a cylindrical clamping frame and a working table surface are arranged on the fixed base, the control mechanism comprises a graver fixing frame, a graver, a chip blowing unit, a main travelling frame and a graver travelling frame, the graver is connected with the graver fixing frame through a connecting disc, the chip blowing unit comprises a fan and an air outlet pipe, and the cylindrical clamping frame comprises a positioning frame, a limiting frame, 2 cylindrical clamping blocks, a motor, a cylindrical supporting bracket and a hydraulic oil cylinder; 2 motors drive 2 cylindrical clamping blocks and cylindrical wood to be processed to synchronously rotate, the main travelling frame drives the nicking tool to move forward and backward along the left-right direction, and the nicking tool travelling frame drives the nicking tool to travel up and down and back and forth to perform carving work; the burin work starts the fan, and the fan blows the piece that the burin sculpture was cut off through going out the tuber pipe, and the piece on the clearance sculpture route hinders, reduces the sculpture resistance for the heat of sculpture department is scattered, slows down the wearing and tearing of burin.

Description

Multifunctional engraving machine

Technical Field

The invention relates to the technical field of engraving machines, in particular to a multifunctional engraving machine.

Background

The engraving machine is common engraving equipment of a numerical control machine tool, is usually used for processing lines on home decoration plates and decoration devices, and effectively improves the pattern processing efficiency of the home decoration plates and the decoration devices. The cylindrical timber needs to be fixed by a fixing device in the processing process, the traditional fixing device fixes the cylindrical timber in a piling mode, and the fixing mode easily damages the timber so as to influence the processing quality of the timber; meanwhile, when the graver is used for engraving, the generated fragments cannot fall off in time, the accumulated fragments block the advancing route of the graver, the engraving resistance is increased, the engraving precision is influenced, and the heat generated by the graver and the engraving part further influences the engraving precision.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the multifunctional engraving machine, the graver is reliably connected with the graver fixing frame, different gravers are convenient to replace, the fan timely cleans scraps at the engraved part, the heat dissipation of the graver and the engraved part is accelerated, and the abrasion of the graver is slowed down.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a multifunctional engraving machine comprises a control mechanism and a fixed base, wherein the control mechanism and the fixed base are used for engraving according to a set program, a cylindrical clamping frame and a working table surface are mounted on the fixed base, the control mechanism comprises a graver fixing frame, a graver, a chip blowing unit, a main travelling frame and a graver travelling frame, the main travelling frame travels along the left and right directions of the working table surface, the graver travelling frame drives the graver to travel up and down, and back and forth, the graver fixing frame is fixedly connected with the bottom end of the graver travelling frame, the graver is connected with the graver fixing frame through a connecting disc, the chip blowing unit comprises a fan and an air outlet pipe, the fan is fixedly mounted on the graver fixing frame, and the air outlet pipe is connected with the graver fixing; the cylinder clamping frame comprises a positioning frame, a limiting frame, 2 cylinder clamping blocks, 2 motors for driving the cylinder clamping blocks to rotate, a cylinder supporting support and a hydraulic oil cylinder, the bottom end of the positioning frame is fixedly connected with the working table, the bottom end of the limiting frame is slidably connected with the working table, the bottom end of the cylinder supporting support is fixedly connected with the top end of the hydraulic oil cylinder, and the working table is provided with a penetrating groove matched with the hydraulic oil cylinder.

Further, the connection pad includes connection pad, No. two connection pads and 4 symmetric distribution's positioning bolt, a connection pad with burin mount fixed connection, a connection pad be equipped with No. two connection pad matched with hold the chamber, No. two connection pads with burin fixed connection, positioning bolt respectively with a connection pad No. two connection pad threaded connection.

Furthermore, the first connecting disc is provided with a protective ring and a protective cavity, the protective ring is in sliding connection with the protective cavity, the number of the protective ring is equal to that of the positioning bolts, the length of the protective ring is smaller than that of the positioning bolts, the protective ring is provided with an opening, the positioning bolts comprise bolt heads, the vertical cross sections of the opening and the bolt heads are both circular, and the inner diameter of the vertical cross section of the opening is smaller than the outer diameter of the vertical cross section of the bolt head.

Furthermore, the connection pad No. one is equipped with the guide block, the connection pad No. two is equipped with the guide way, the guide block with the quantity of guide way all is 2, the width of guide block is less than the width of guide way.

Furthermore, No. one connection pad is equipped with filling groove, filling block and reset spring, the filling block with go up filling groove sliding connection, reset spring's top with go up filling groove fixed connection, reset spring's bottom with filling block fixed connection, No. two connection pads be equipped with filling block matched with lower filling groove.

Furthermore, the limiting frame is provided with a sliding stop rod and a sliding stop cap, the sliding stop cap is in threaded connection with the sliding stop rod, the sliding stop rod is provided with an upper limiting sheet, and the sliding stop cap is provided with an operating handle.

Furthermore, the cylinder screens piece is equipped with auxiliary stay frame, fastening block and fastening nut, auxiliary stay frame is equipped with logical groove, the fastening block runs through logical groove with fastening nut threaded connection, the fastening block is equipped with the cylinder locking piece, the vertical cross-section external diameter of cylinder locking piece is greater than the width that leads to the groove.

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

1) the method comprises the following steps that cylindrical wood is horizontally and transversely placed on a cylindrical support, the height of the cylindrical support is adjusted through a hydraulic oil cylinder, the horizontal central axis of the cylindrical wood is enabled to coincide with the horizontal central axis of cylindrical clamping blocks, a sliding limiting frame is arranged, 2 cylindrical clamping blocks are respectively abutted against the left end and the right end of the cylindrical wood, a single person can operate to fix the cylindrical wood to be processed between the 2 cylindrical clamping blocks, 2 motors drive the 2 cylindrical clamping blocks and the cylindrical wood to synchronously rotate, a main walking frame drives a nicking tool to move forwards and backwards along the left and right directions, and on the basis of walking, a nicking tool walking frame drives the nicking tool to move up and down and back and forth to perform carving work; the graver works, the fan is started, the fan blows away the chips carved and cut by the graver through the air outlet pipe, the chip obstruction on the carving path is cleared, the carving resistance is reduced, the heat dissipation of the carving position is accelerated, and the abrasion of the graver is slowed down;

2) the guide groove penetrates through the guide block, the second connecting disc enters the accommodating cavity of the first connecting disc, the second connecting disc rises to be abutted against the top end of the accommodating cavity, the second connecting disc is rotated clockwise to enable the guide block to be abutted against one side of the guide groove, at the moment, the first connecting disc is aligned with the threaded hole of the second connecting disc, the positioning bolt is screwed, and the positioning bolt is in threaded connection with the first connecting disc and the second connecting disc so as to connect the nicking tool and the nicking tool fixing frame, so that different nicking tools can be replaced conveniently;

3) the horizontal central axis of the cylindrical wood is coincided with the horizontal central axis of the cylindrical clamping block, the limiting frame is slid, 2 cylindrical clamping blocks respectively abut against the left end and the right end of the cylindrical wood, the anti-skidding cap is screwed, the fastening block is moved towards the direction close to the cylindrical wood until the fastening block abuts against the cylindrical wood, the fastening nut is screwed, the fastening block assists the cylindrical clamping block to clamp the cylindrical wood, and the cylindrical wood is prevented from slipping in the carving process;

4) and the second connecting disc enters the cavity, the filling block enters the lower filling groove, the second connecting disc continues to rise, the filling block extrudes the return spring to move upwards, and the return spring and the filling block apply downward acting force to the second connecting disc, so that the first connecting disc is further connected with the second connecting disc tightly.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged schematic view of A;

FIG. 3 is an enlarged schematic view of B;

FIG. 4 is a schematic view showing the connection of the guide block and the guide groove;

FIG. 5 is a schematic structural view of a non-slip bar and a non-slip cap;

the following are structural designations of the invention:

1-a cylindrical clamping frame, 11-a positioning frame, 12-a limiting frame, 121-a stop slide rod, 1211-an upper limiting sheet, 122-a stop slide cap, 1221-an operating handle, 13-a cylindrical clamping block, 131-an auxiliary supporting frame, 132-a fastening block, 1321-a cylindrical locking block, 133-a fastening nut, 14-a motor, 15-a cylindrical supporting holder and 16-a hydraulic oil cylinder; 2-working table surface, 21-penetrating groove; 3-graver fixing frame, 31-first connecting disc, 311-protective ring, 3111-opening, 312-protective cavity, 313-guide block, 314-upper filling groove, 315-filling block, 316-reset spring, 32-positioning bolt, 321-bolt head and 33-accommodating cavity; 4-graver, 41-connecting disc II, 411-guide groove, 412-lower filling groove, 5-main walking frame, 6-graver walking frame, 7-fan, 8-air outlet pipe and 9-cylindrical wood.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-5, a multifunctional engraving machine comprises a control mechanism and a fixed base for engraving according to a set program, wherein the fixed base is provided with a cylindrical holding frame 1 and a working table surface 2, the control mechanism comprises a graver fixing frame 3, a graver 4, a chip blowing unit, a main travelling frame 5 travelling along the left and right directions of the working table surface 2 and a graver travelling frame 6 driving the graver 4 to travel up and down, front and back, the graver fixing frame 3 is fixedly connected with the bottom end of the graver travelling frame 6, the graver 4 is connected with the graver fixing frame 3 through a connecting disc, the chip blowing unit comprises a fan 7 and an air outlet pipe 8, the fan 7 is fixedly arranged on the graver fixing frame 3, and the air outlet pipe 8 is connected with the graver fixing frame 3 through a through passage; the cylinder holding frame 1 comprises a positioning frame 11, a limiting frame 12, 2 cylinder clamping blocks 13, a motor 14 for driving the cylinder clamping blocks 13 to rotate, a cylinder support bracket 15 and a hydraulic oil cylinder 16, the bottom end of the positioning frame 11 is fixedly connected with a worktable 2, the bottom end of the limiting frame 12 is slidably connected with the worktable 2, the bottom end of the cylinder support bracket 15 is fixedly connected with the top end of the hydraulic oil cylinder 16, and the worktable 2 is provided with a penetrating groove 21 matched with the hydraulic oil cylinder 16. Horizontally and horizontally placing the cylindrical timber 9 on a cylindrical support 15, adjusting the height of the cylindrical support 15 through a hydraulic oil cylinder 16 to ensure that the horizontal central axis of the cylindrical timber 9 is superposed with the horizontal central axis of a cylindrical clamping block 13, abutting 2 cylindrical clamping blocks 13 against the left end and the right end of the cylindrical timber 9 respectively by a sliding limiting frame 12, fixing the cylindrical timber 9 to be processed between the 2 cylindrical clamping blocks 13, and driving the 2 cylindrical clamping blocks 13 and the cylindrical timber 9 to synchronously rotate by 2 motors 14; the main walking frame 5 drives the graver 4 to move forward and backward along the left-right direction, and on the basis of the walking, the graver walking frame 6 drives the graver 11 to walk up and down and back and forth to perform carving work; 4 work of burin, start fan 7, fan 7 blows away the piece that burin 4 sculpture was cut through going out tuber pipe 8, and the piece on the clearance sculpture route hinders, reduces the sculpture resistance for the heat of sculpture department is dispelled.

The connecting disc comprises a first connecting disc 31, a second connecting

disc

41 and 4 positioning bolts 32 which are symmetrically distributed, the first connecting disc 31 is fixedly connected with the graver fixing frame 3, the first connecting disc 31 is provided with an accommodating cavity 33 matched with the second connecting disc 41, the second connecting disc 41 is fixedly connected with the graver 4, and the positioning bolts 32 are respectively in threaded connection with the first connecting disc 31 and the second connecting disc 41. The second connecting disc 41 enters the accommodating cavity 33 of the first connecting disc 31, and the positioning bolt 32 is in threaded connection with the first connecting disc 31 and the second connecting disc 41, so that the nicking tool 4 and the nicking tool fixing frame 3 are connected.

Wherein, No. one connection pad 31 is equipped with guard ring 311 and protection chamber 312, guard ring 311 and protection chamber 312 sliding connection, the quantity of guard ring 311 equals with positioning bolt 32's quantity, guard ring 311's length is less than positioning bolt 32's length, guard ring 311 is equipped with opening 3111, positioning bolt 32 includes tieing head 321, the vertical cross-section of opening 3111 and tieing head 321 all is circular shape, the vertical cross-section internal diameter of opening 3111 is less than the vertical cross-section external diameter of tieing head 321. The protective ring 311 reduces impact of debris generated by carving on the joint of the positioning bolt 32 and the first connecting disc 31, and enables the positioning bolt 32 to be always connected with the first connecting disc 31, so that loss of the positioning bolt 32 caused by replacement of the graver 4 for many times is avoided.

The first connecting disc 31 is provided with a guide block 313, the second connecting disc 41 is provided with a guide groove 411, the number of the guide block 313 and the number of the guide groove 411 are both 2, and the width of the guide block 313 is smaller than that of the guide groove 411. The guide slot 411 passes through the guide block 313, the second connecting disc 41 is abutted against the top end of the accommodating cavity 33, the second connecting disc 41 is rotated clockwise to enable the guide block 313 to be abutted against one side of the guide slot 411, at the moment, the first connecting disc 31 is aligned with the threaded hole of the second connecting disc 41, and the positioning bolt 32 is screwed.

The first connecting disc 31 is provided with an upper filling groove 314, a filling block 315 and a return spring 316, the filling block 315 is slidably connected with the upper filling groove 314, the top end of the return spring 316 is fixedly connected with the upper filling groove 314, the bottom end of the return spring 316 is fixedly connected with the filling block 315, and the second connecting disc 41 is provided with a lower filling groove 412 matched with the filling block 315. The second connecting disc 41 enters the cavity 33, the filling block 315 enters the lower filling groove 412, the second connecting disc 41 continues to ascend, the filling block 315 presses the return spring 316 to move upwards, and the return spring 316 and the filling block 315 exert downward acting force on the second connecting disc 41, so that the first connecting disc 31 is tightly connected with the second connecting disc 41.

Wherein, the limiting frame 12 is provided with a non-slip rod 121 and a non-slip cap 122, the non-slip cap 122 is in threaded connection with the non-slip rod 121, the non-slip rod 121 is provided with an upper limiting sheet 1211, and the non-slip cap 122 is provided with an operating handle 1221. The cylindrical clamping block 13 connected from the sliding limiting frame 12 to the limiting frame 12 is abutted against the cylindrical wood 9, the anti-slip cap 122 is screwed, the limiting frame 12 is fixed, the operating handle 1221 is convenient for screwing the anti-slip cap 122, and the upper limiting sheet 1211 enables the anti-slip cap 122 to be connected with the anti-slip rod 121 all the time.

Wherein, cylinder screens piece 13 is equipped with auxiliary stay frame 131, fastening block 132 and fastening nut 133, and auxiliary stay frame 131 is equipped with logical groove, and fastening block 132 runs through logical groove and fastening nut 133 threaded connection, and fastening block 132 is equipped with cylinder lock block 1321, and cylinder lock block 1321's vertical cross-section external diameter is greater than the width that leads to the groove. The horizontal axis of cylinder timber 9 coincides with the horizontal axis of cylinder screens piece 13, and slip spacing 12, 2 cylinder screens piece 13 are inconsistent with the both ends about cylinder timber 9 respectively, twist and twist skid cap 122, and the direction that is close to cylinder timber 9 removes fastening block 132 to fastening block 132 and cylinder timber 9 is inconsistent, twists fastening nut 133.

The following are 2 specific examples of the present invention:

example 1

A multifunctional engraving machine comprises a control mechanism and a fixed base, wherein the control mechanism and the fixed base are used for engraving according to a set program, a cylindrical clamping frame 1 and a working table top 2 are installed on the fixed base, the control mechanism comprises a graver fixing frame 3, a graver 4, a scrap blowing unit, a main walking frame 5 walking along the left and right directions of the working table top 2 and a graver walking frame 6 driving the graver 4 to walk up and down and front and back, the graver fixing frame 3 is fixedly connected with the bottom end of the graver walking frame 6, the graver 4 is connected with the graver fixing frame 3 through a connecting disc, the connecting disc comprises a first connecting disc 31, a second connecting

disc

41 and 4 positioning bolts 32 which are symmetrically distributed, the first connecting disc 31 is fixedly connected with the graver fixing frame 3, the first connecting disc 31 is provided with a containing cavity 33 matched with the second connecting disc 41, the second connecting disc 41 is fixedly connected with the graver 4, and the positioning, The second connecting disc 41 is in threaded connection, the scrap blowing unit comprises a fan 7 and an air outlet pipe 8, the fan 7 is fixedly arranged on the nicking tool fixing frame 3, and the air outlet pipe 8 is connected with the nicking tool fixing frame 3 through a through passage; the cylindrical clamping frame 1 comprises a positioning frame 11, a limiting frame 12, 2 cylindrical clamping blocks 13, 2 motors 14 for driving the cylindrical clamping blocks 13 to rotate, a cylindrical support bracket 15 and a hydraulic oil cylinder 16, the bottom end of the positioning frame 11 is fixedly connected with the worktable top 2, the bottom end of the limiting frame 12 is slidably connected with the worktable top 2, the limiting frame 12 is provided with a stop slide rod 121 and a stop slide cap 122, the stop slide cap 122 is in threaded connection with the stop slide rod 121, the stop slide rod 121 is provided with a stop sheet 1211, the stop slide cap 122 is provided with an operating handle 1221, the bottom end of the cylindrical support bracket 15 is fixedly connected with the top end of the hydraulic oil cylinder 16, and the worktable top 2 is provided with a penetrating groove 21 matched with the hydraulic oil cylinder 16.

The second connecting disc 41 enters the accommodating cavity 33 of the first connecting disc 31, the positioning bolt 32 is in threaded connection with the first connecting disc 31 and the second connecting disc 41 so as to connect the nicking tool 4 and the nicking tool fixing frame 3, the cylindrical timber 9 is horizontally and transversely placed on the cylindrical supporting bracket 15, the height of the cylindrical supporting bracket 15 is adjusted through the hydraulic oil cylinder 16, the horizontal central axis of the cylindrical timber 9 is superposed with the horizontal central axis of the cylindrical clamping block 13, the sliding limiting frame 12 and the 2 cylindrical clamping blocks 13 are respectively abutted against the left end and the right end of the cylindrical timber 9, the anti-sliding cap 122 is screwed, the cylindrical timber 9 to be processed is fixed between the 2 cylindrical clamping blocks 13, the cylindrical supporting bracket 15 is moved downwards through the hydraulic oil cylinder 16 to be separated from the cylindrical timber 9, and the 2 motors 14 drive the 2 cylindrical clamping blocks 13 and the cylindrical timber 9 to synchronously rotate; the main walking frame 5 drives the graver 4 to move forward and backward along the left-right direction, and on the basis of the walking, the graver walking frame 6 drives the graver 11 to walk up and down and back and forth to perform carving work; 4 work of burin, start fan 7, fan 7 blows away the piece that burin 4 sculpture was cut through going out tuber pipe 8, and the piece on the clearance sculpture route hinders, reduces the sculpture resistance for the heat of sculpture department is dispelled.

Example 2

disc

41 and 4 positioning bolts 32 which are symmetrically distributed, the first connecting disc 31 is fixedly connected with the graver fixing frame 3, the first connecting disc 31 is provided with a containing cavity 33 matched with the second connecting disc 41, the second connecting disc 41 is fixedly connected with the graver 4, and the positioning, The second connecting disc 41 is in threaded connection, the first connecting disc 31 is provided with a protection ring 311 and a protection cavity 312, the protection ring 311 is in sliding connection with the protection cavity 312, the number of the protection rings 311 is equal to that of the positioning bolts 32, the length of the protection ring 311 is smaller than that of the positioning bolts 32, the protection ring 311 is provided with an opening 3111, the positioning bolts 32 comprise bolt heads 321, the vertical sections of the opening 3111 and the bolt heads 321 are both in a circular shape, the inner diameter of the vertical section of the opening 3111 is smaller than that of the vertical section of the bolt heads 321, the chip blowing unit comprises a fan 7 and an air outlet pipe 8, the fan 7 is fixedly installed on the graver fixing frame 3, and the air outlet pipe 8 is connected with the graver fixing frame 3; the cylindrical clamping frame 1 comprises a positioning frame 11, a limiting frame 12, 2 cylindrical clamping blocks 13, 2 motors 14 for driving the cylindrical clamping blocks 13 to rotate, a cylindrical support bracket 15 and a hydraulic oil cylinder 16, the bottom end of the positioning frame 11 is fixedly connected with the worktable top 2, the bottom end of the limiting frame 12 is slidably connected with the worktable top 2, the limiting frame 12 is provided with a stop slide rod 121 and a stop slide cap 122, the stop slide cap 122 is in threaded connection with the stop slide rod 121, the stop slide rod 121 is provided with a stop sheet 1211, the stop slide cap 122 is provided with an operating handle 1221, the bottom end of the cylindrical support bracket 15 is fixedly connected with the top end of the hydraulic oil cylinder 16, and the worktable top 2 is provided with a penetrating groove 21 matched with the hydraulic oil cylinder 16.

The protective ring 311 reduces impact of debris generated by carving on the joint of the positioning bolt 32 and the first connecting disc 31, and enables the positioning bolt 32 to be always connected with the first connecting disc 31, so that loss of the positioning bolt 32 caused by replacement of the graver 4 for many times is avoided.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A multifunctional engraving machine, which comprises a control mechanism and a fixed base, wherein the control mechanism is used for engraving according to a set program, a cylindrical clamping frame (1) and a working table surface (2) are arranged on the fixed base, it is characterized in that the control mechanism comprises a nicking tool fixing frame (3), a nicking tool (4), a scrap blowing unit, a main walking frame (5) walking along the left and right directions of the working table surface (2) and a nicking tool walking frame (6) driving the nicking tool (4) to walk up and down and back and forth, the graver fixing frame (3) is fixedly connected with the bottom end of the graver walking frame (6), the graver (4) is connected with the graver fixing frame (3) through a connecting disc, the scrap blowing unit comprises a fan (7) and an air outlet pipe (8), the fan (7) is fixedly arranged on the graver fixing frame (3), the air outlet pipe (8) is connected with the graver fixing frame (3) through a through channel;

the cylinder clamping frame (1) comprises a positioning frame (11), a limiting frame (12), 2 cylinder clamping blocks (13) and 2 driving motors (14) and cylinder supporting brackets (15) and hydraulic cylinders (16) which are used for rotating the cylinder clamping blocks (13), the bottom end of the positioning frame (11) is fixedly connected with the workbench surface (2), the bottom end of the limiting frame (12) is connected with the workbench surface (2) in a sliding mode, the bottom end of the cylinder supporting brackets (15) is fixedly connected with the top end of the hydraulic cylinders (16), and the workbench surface (2) is provided with penetrating grooves (21) matched with the hydraulic cylinders (16).

2. The multifunctional engraving machine according to claim 1, wherein the connecting disc comprises a first connecting disc (31), a second connecting disc (41) and 4 symmetrically distributed positioning bolts (32), the first connecting disc (31) is fixedly connected with the engraving knife fixing frame (3), the first connecting disc (31) is provided with an accommodating cavity (33) matched with the second connecting disc (41), the second connecting disc (41) is fixedly connected with the engraving knife (4), and the positioning bolts (32) are respectively in threaded connection with the first connecting disc (31) and the second connecting disc (41).

3. The multifunctional engraving machine according to claim 2, wherein the first connecting disc (31) is provided with a protective ring (311) and a protective cavity (312), the protective ring (311) is slidably connected with the protective cavity (312), the number of the protective rings (311) is equal to the number of the positioning bolts (32), the length of the protective ring (311) is smaller than that of the positioning bolts (32), the protective ring (311) is provided with an opening (3111), the positioning bolts (32) comprise bolt heads (321), the vertical cross sections of the opening (3111) and the bolt heads (321) are circular, and the inner diameter of the vertical cross section of the opening (3111) is smaller than the outer diameter of the vertical cross section of the bolt heads (321).

4. The multifunctional engraving machine according to claim 2, characterized in that the connection disc number one (31) is provided with a guide block (313), the connection disc number two (41) is provided with a guide slot (411), the number of the guide block (313) and the guide slot (411) is 2, and the width of the guide block (313) is smaller than the width of the guide slot (411).

5. The multifunctional engraving machine according to claim 2, wherein the first connecting disc (31) is provided with an upper filling groove (314), a filling block (315) and a return spring (316), the filling block (315) is slidably connected with the upper filling groove (314), the top end of the return spring (316) is fixedly connected with the upper filling groove (314), the bottom end of the return spring (316) is fixedly connected with the filling block (315), and the second connecting disc (41) is provided with a lower filling groove (412) matched with the filling block (315).

6. The multifunctional engraving machine according to claim 1, wherein the limiting frame (12) is provided with a non-slip rod (121) and a non-slip cap (122), the non-slip cap (122) is in threaded connection with the non-slip rod (121), the non-slip rod (121) is provided with an upper limiting sheet (1211), and the non-slip cap (122) is provided with an operating handle (1221).

7. The multifunctional engraving machine according to claim 1, wherein the cylindrical block (13) is provided with an auxiliary support frame (131), a fastening block (132) and a fastening nut (133), the auxiliary support frame (131) is provided with a through slot, the fastening block (132) is in threaded connection with the fastening nut (133) through the through slot, the fastening block (132) is provided with a cylindrical locking block (1321), and the outer diameter of the vertical section of the cylindrical locking block (1321) is larger than the width of the through slot.