CN118650187A - Multistation cnc engraving and milling machine - Google Patents

Abstract

The invention relates to the technical field of machine tool equipment, in particular to a multi-station engraving and milling machine, which comprises: a bed body; a cross shaft processing shaft, a plurality of which are commonly installed on the cross shaft; the feeding table is arranged on the lathe bed in a driving way; a processing material table, wherein a cavity is arranged in the processing material table; the dividing plate is uniformly arranged in the processing material table at intervals and divides the internal cavity into a plurality of independent small cavities; the pipeline joints are uniformly arranged on the outer side wall of the processing material table in a pair-by-pair mode at intervals, and each group of pipeline joints corresponds to one independent small cavity; one of the two pipe joints is connected with fluid of minus five to ten degrees, and the fluid is discharged from the other pipe joint through the backflow port. According to the invention, the processing material table with a special structure is arranged on the feeding table, low-temperature fluid is circularly injected into the processing material table, water is injected into the contact area of the workpiece and the processing material table, and the workpiece is quickly and effectively fixed after the water is condensed into ice at low temperature.

Description

Multistation cnc engraving and milling machine

Technical Field

The invention relates to the technical field of machine tool equipment, in particular to a multi-station engraving and milling machine.

Background

The engraving and milling machine is a machine tool used when the machining precision requirement of the small-sized workpiece is high, for example, for machining of a mobile phone middle plate, because the mobile phone middle plate is a main supporting piece in the mobile phone assembling process, all parts related to the mobile phone are installed and fixed through the mobile phone middle plate, and therefore accurate mounting grooves and/or holes are required to be milled on the front side and the back side of the mobile phone middle plate; the engraving and milling machine with a plurality of processing stations can process small metal workpieces such as a mobile phone middle plate in batches, so that the processing efficiency is improved.

In the processing process, the plate needs to be fixed, and common fixing modes include fixture clamping and fixing, vacuum adsorption and fixing and adhesive fixing; the fixture clamps and fixes the plates, redundant parts are reserved for clamping, the plates are wasted, and meanwhile, workpieces are easy to deform due to the fact that thin-wall parts are processed; the vacuum adsorption fixing needs to ensure that the adsorption surface of the workpiece is smooth, and if holes exist, the adsorption is unstable; the fixing of the adhesive is a mode suitable for plate processing, but the fixing mode often increases the processing time, and the solidification and the adhesive removal of the adhesive all need to wait for a long time, so that the processing efficiency is reduced, and the adhesive is extremely troublesome in cleaning residual adhesive.

Disclosure of Invention

The invention aims to solve the technical problems in the prior art, and therefore, the invention provides a multi-station engraving and milling machine.

In order to achieve the above object, the present invention provides a multi-station engraving and milling machine comprising: a bed body; the transverse shaft is transversely arranged at the edge of one side of the lathe bed; a plurality of processing shafts commonly mounted on the transverse shaft; a feeding table arranged on the lathe bed in a driving way and positioned below the processing shaft; the processing material table is internally provided with a cavity and the bottom is sealed by a bottom plate, the processing material table is uniformly arranged on the feeding table according to the number of the processing shafts, and the processing material table is made of metal with excellent heat conductivity; the dividing plate is uniformly arranged in the processing material table at intervals and divides the cavity in the processing material table into a plurality of independent small cavities; the drainage plate is centrally arranged in an independent small cavity in the processing material table, one end of the drainage plate is connected with the cavity wall, and a return port is reserved between the other end of the drainage plate and the cavity wall; the middle of the flow limiting plate is arched, two sides of the top surface are bent downwards, the flow limiting plate is filled in the independent small cavity, and a gap is reserved between the flow limiting plate and the inner top surface of the independent small cavity; the pipeline joints are uniformly arranged on the outer side wall of the processing material table in a pair-by-pair mode at intervals, each group of pipeline joints corresponds to one independent small cavity, and the pipeline joints are positioned on one side opposite to the backflow port; one of the two pipeline joints is connected with fluid with the temperature of minus five to ten degrees, and the fluid is discharged from the other pipeline joint through the backflow port; the mechanical swing arm is arranged on one side of the bed body, which is far away from the transverse shaft; the pneumatic adsorption blocks are uniformly arranged on the mechanical swing arm at intervals of the number of the processing material tables.

As a further improvement, the mechanical swing arm includes: the hydraulic cylinder is arranged on one side of the lathe bed, which is far away from the transverse shaft; the main arm is arranged on a movable rod of the hydraulic cylinder; one end of the middle arm is rotatably connected with the main arm; one end of the tail end swing arm is rotationally connected with the other end of the middle arm; the motor is arranged on the main arm; the middle arm is driven by a gear set with the motor; the drive bevel gear is respectively fixed on the main arm and the tail end swing arm in a mode of rotating the shaft center; and the driven bevel gears are arranged in two and are rotatably arranged on the middle arm through rotating rods, and the two driven bevel gears are respectively meshed with the driving bevel gears on the two sides.

As a further improvement, the top surface of the processing material table is provided with criss-cross reinforcing grooves.

As a further improvement, the method further comprises: soaking strips are uniformly arranged at the top of the cavity in the processing material table at intervals.

As a further improvement, the method further comprises: one side of the side frame is hinged with the processing material table, and the other side of the side frame is fixed by a movable buckle arranged on the processing material table; the outer dimension of the side frame is matched with the outer dimension of the processing material table, and a sealing rubber strip is arranged between the side frame and the processing material table.

As a further improvement, the method further comprises: the positioning frame is slidably arranged on one side of the frame through a guide rod; the positioning block is arranged on the positioning frame in a sliding manner.

As a further improvement, two ends of the positioning frame extend in a protruding mode, one end of the positioning frame is provided with a clamping groove, and the other end of the positioning frame is provided with a clamping protrusion matched with the clamping groove.

As a further improvement, the method further comprises: and the bamboo joint pipe is arranged on the locating rack and moves along with the locating rack.

As a further improvement, the pneumatic adsorption block further comprises: and the air bag rings are arranged around the bottom of the pneumatic adsorption block at intervals, and air holes are uniformly formed between the two air bag rings at intervals.

As a further improvement, the method further comprises: the bearing brackets are symmetrically and fixedly arranged at the edge of one side of the lathe bed and are contacted with the mechanical swing arms in a matched manner.

The invention brings the following effects:

1. according to the invention, the processing material table with a special structure is arranged on the feeding table, low-temperature fluid is circularly injected into the processing material table, after a workpiece is placed on the processing material table, water is injected into the contact area of the workpiece and the processing material table, the workpiece is quickly and effectively fixed after the water is condensed into ice through low temperature, and the condensation speed of the water on the processing material table can be accelerated by each independent cavity in the processing material table.

2. The reinforcing groove provided by the invention can ensure that the water-condensed ice has better stability, and the ice cubes are prevented from being separated from the processing material table in the process of processing the workpiece.

3. The soaking strips arranged in the processing material table can enable the temperature transmission speed of the processing material table to be higher, further enable water to achieve faster condensation and melting effects, and accelerate the fixing and releasing speed of workpieces.

4. The mechanical swing arm provided by the invention can be used for carrying out batch taking-out and replacing operations on workpieces, and has the advantages of simple and ingenious structural design, simpler maintenance and more reliable use compared with the traditional mechanical arm.

5. The locating rack provided by the invention can uniformly locate and place the workpieces placed on the processing material table, so that the problem of processing errors caused by irregular placement of the workpieces is avoided.

Drawings

FIG. 1 is a schematic diagram of the present invention.

Fig. 2 is another view of fig. 1 according to the present invention.

Fig. 3 is a schematic view of the mechanical swing arm in a straight-horizontal state after the horizontal axis and the processing axis are omitted in fig. 1.

FIG. 4 is a schematic view of a processing table, a frame, a positioning frame and a bamboo joint pipe according to the present invention.

FIG. 5 is a schematic side cross-sectional view of a processing station of the present invention.

Fig. 6 is another view of fig. 5 according to the present invention.

Fig. 7 is a bottom view and a schematic front cross-sectional view of a processing station of the present invention.

Fig. 8 is a schematic perspective view of the bottom of the processing table according to the present invention.

Fig. 9 is a schematic view of a mechanical swing arm and a pneumatic suction block of the present invention.

Fig. 10 is a schematic diagram showing the state change of the mechanical swing arm according to the present invention.

FIG. 11 is a schematic view of an air bag ring and an air hole of the pneumatic adsorbing block according to the present invention.

Wherein, the correspondence between the reference numerals and the names of all the components in the drawings is:

1-a lathe bed, 2-a transverse shaft, 3-a processing shaft and 4-a feeding table;

5-processing material table, 51-bottom plate, 52-pipeline joint, 53-dividing plate, 54-drainage plate, 55-flow-limiting plate and 56-return port;

6, a reinforcement groove;

7-soaking bars;

8-side frames, 81-movable buckles;

9-positioning frames, 91-guide rods, 92-positioning blocks and 93-clamping grooves;

10-bamboo joint pipe;

11-hydraulic cylinders, 111-main arms, 112-middle arms, 113-end swing arms, 114-motors, 115-gear sets, 116-drive bevel gears and 117-driven bevel gears;

12-pneumatic adsorption block, 121-air bag ring and 122-air hole;

13-load bearing brackets.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present application are shown in the drawings. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

The invention discloses a multi-station engraving and milling machine, which is shown in fig. 1-11, and specifically comprises: as the lathe bed 1 of the main body of the lathe, it should be understood that there are corresponding shell cladding, operating system, control panel, drive power supply and some other necessary facilities in the cnc engraving machine besides lathe bed 1, only take the improvement part concerned as the drawing example in this embodiment, transversely erect the horizontal axis 2 in the position near the edge of one side of top of lathe bed 1, the horizontal axis 2 mainly provides the driving force of the horizontal movement to the connecting object, fixedly mount three processing shafts 3 on the horizontal axis 2, can install the necessary cutter of drilling and milling on the processing shaft 3, each processing shaft 3 can make the cutter move up and down independently, and a plurality of processing supplies share a horizontal axis 2, can make the error of the lateral interval among a plurality of processing shafts 3 reduce to the greatest extent, need to put the work piece on the feeding table 4 and then send the work piece to the below of the processing shaft 3 in the course of processing, the feeding table 4 is slidably mounted on lathe bed 1 and is located below the processing shaft 3, the feeding table 4 realizes the steady through the built-in straight line driving equipment;

Three processing material tables 5 are uniformly arranged on the feeding table 4 at intervals, the interior of the processing material tables 5 is a hollow cavity and the bottom of the processing material tables is sealed by a bottom plate 51, the processing material tables 5 are made of copper or aluminum with excellent heat conductivity, a plurality of dividing plates 53 are uniformly fixed in the cavity of the processing material tables 5 at intervals according to the figures 7 and 8, and the dividing plates 53 divide the cavity of the interior of the processing material tables 5 into a plurality of independent small cavities which are not communicated; A flow-guiding plate 54 is fixed in the middle of the independent small cavity, one end of the flow-guiding plate 54 is connected with the cavity wall, a backflow port 56 is reserved between the other end and the cavity wall, a flow-limiting plate 55 is filled in the cavity of the processing material table 5 divided by the flow-guiding plate 54 and the partition plate, the middle of the flow-limiting plate 55 arches, the two sides of the top surface are bent downwards, the two sides of the flow-limiting plate 55 are respectively in tight contact with the flow-limiting plate 55 and the partition plate 53, a gap is reserved between the top surface of the flow-limiting plate 55 and the inner top surface of the independent small cavity, a pipeline joint 52 is communicated on the outer side wall of the processing material table 5 according to the illustration of figure 5, the pipeline joints 52 are uniformly distributed in a group of intervals, Each group of pipeline joints 52 corresponds to an independent small cavity, three groups are arranged in total, and the pipeline joints 52 are arranged at one side far away from the return port 56; according to fig. 7, two pipe joints 52 are installed in the area of the same independent small cavity, and the two pipe joints 52 are arranged at intervals by a drainage plate 54, wherein one pipe joint 52 is used for injecting fluid with the angle of minus five to ten degrees into the independent small cavity from the outside, the fluid can be liquid with the angle of minus eight degrees without condensation and can smoothly flow, the low-temperature liquid is limited by the drainage plate 54 after being injected into the independent small cavity from the pipe joint 52, and can flow only in the area on one side until the other half area can be filled through a backflow port 56, and when the independent small cavity is completely filled, the low-temperature liquid is discharged from the other pipe joint 52; Specifically, when a workpiece is required to be fixed, the workpiece is placed on the processing material table 5, low-temperature liquid is continuously injected inwards through the pipeline joint 52 to cool the surface of the processing material table 5, water starts to pour along the placing edge of the workpiece while cooling, the workpiece is frozen by water after the water is cooled and condensed, in order to keep stable, water can be injected for a small amount of times along the contact edge of the workpiece and the table top to wait for condensation when the water is injected, the low temperature is continuously kept after the water is frozen, scrap iron and ice dust generated in the processing process of the workpiece are flushed away by cutting fluid, the cutting fluid can be low-temperature resistant liquid such as cutting oil, thus the thickening of an ice layer can be avoided in the processing process, After the processing is finished, the low-temperature water injected through the pipeline joint 52 can be replaced by the low-temperature water or the low-temperature water with a certain temperature to enable the processing material table 5 to heat up to accelerate the thawing of the ice layer, the workpiece can be taken away after the thawing is finished, the workpiece fixed in the mode is not easy to deform and fall off in the processing process, and meanwhile, the workpiece is not required to be cleaned additionally, so that the processing material table is simple and convenient to use and excellent in fixing effect; The function of the flow limiting plate 55 is to reduce the amount of low-temperature liquid entering the independent small cavity, and in a limited space, the processing material table 5 is cooled to the maximum extent, and meanwhile, the low-temperature liquid is always converged in the upper part area close to the independent small cavity when flowing;

According to the illustration in fig. 6, in order to avoid that water is not stable and easily falls off after being condensed into ice on a smooth processing material table 5, the top surface of the processing material table 5 is also provided with criss-cross reinforcing grooves 6, and the solidified ice layer has better stabilizing effect through the reinforcing grooves 6; meanwhile, according to the method shown in fig. 7, in order to enable the temperature in the independent small cavity and the temperature on the outer surface of the processing material table 5 to be transferred more quickly, soaking strips 7 protruding downwards are uniformly arranged at intervals on the top of the cavity in the processing material table 5, and the heat in two different areas can be transferred more quickly by the aid of the soaking strips 7, so that the water condensation or thawing speed on the processing material table 5 is increased;

In general processing, the engraving and milling machine is provided with an outer shell which can be completely and freely sealed, and the area where the processing shaft 3 is located belongs to the processing area which needs to be isolated, so that in order to better complete the workpiece taking and discharging operation, a mechanical swing arm is arranged on one side of the machine body 1, which is far away from the transverse shaft 2, and three pneumatic adsorption blocks 12 are uniformly arranged at intervals at the tail end of the mechanical swing arm.

In a specific embodiment, according to fig. 1, 3 and 9-11, to further improve the mechanical swing arm to make it easy to maintain and use, the improved mechanical swing arm mainly includes: a hydraulic cylinder 11 fixedly arranged on the machine body 1 and far from one side of the transverse shaft 2, a main arm 111 fixedly arranged on a movable rod of the hydraulic cylinder 11, the main arm 111 lifting up and down through the hydraulic cylinder 11, four guide rods fixed on the periphery of the hydraulic cylinder 11, the main arm 111 and the guide rods being slidingly connected, so as to limit and guide through the guide rods, one end of the main arm 111 being rotatably connected with one end of a middle arm 112, the other end of the middle arm 112 being rotatably connected with one end of a tail end swing arm 113, three pneumatic adsorption blocks 12 are uniformly arranged on the tail end swing arm 113 at intervals, and the pneumatic adsorption blocks 12 are connected in series through air pipes; According to fig. 9, a motor 114 is installed at the lower part of a main arm 111, the motor 114 drives a middle arm 112 to swing through a gear set 115, the main arm 111, the middle arm 112 and a tail end swing arm 113 are in the same straight line, a rotating rod is rotatably arranged on the middle arm 112, two ends of the rotating rod are connected with a driven bevel gear 117 through keys, driving bevel gears 116 are fixedly connected at the rotation connection part of the main arm 111 and the tail end swing arm 113 and at the same rotation axis, two driven bevel gears 117 are respectively meshed with the driving bevel gears 116 at two sides, the driving bevel gears 116 and the driven bevel gears 117 are protected through a protection shell fixed on the middle arm 112, to prevent foreign matter from getting stuck on the teeth; As shown in fig. 10, when the motor 114 drives the middle arm 112 to swing ninety degrees, the drive bevel gear 116 on the main arm 111 is fixed, while the driven bevel gear 117 on one side of the middle arm 112, which is close to the main arm 111, is engaged to rotate ninety degrees during the process of following the swing of the middle arm 112, and the driven bevel gear 117 on the other side follows the ninety degrees, and finally, the drive bevel gear 116 on the end swing arm 113 is rotated ninety degrees by the engagement drive, so that the middle arm 112 and the main arm 111 are perpendicular to the end swing arm 113; Specifically, as shown in fig. 1 and 3, in the process of processing of the engraving and milling machine, the shell needs to be closed to isolate the processing area, so that the mechanical swing arm needs to be kept in a straight state at the moment, the mechanical swing arm is positioned at the edge of the engraving and milling machine and cannot interfere with the processing, when the workpiece is processed, the feeding table 4 moves to be close to the mechanical swing arm, the motor 114 works to enable the tail end swing arm 113 to swing and suspend above the processing table 5, the hydraulic cylinder 11 moves downwards with the main arm 111, the pneumatic adsorption block 12 on the tail end swing arm 113 is contacted with the workpiece to adsorb the workpiece, after the workpiece is lifted, the tail end swing arm 113 is driven to move to the outside of the engraving and milling machine through the motor 114, The workpiece can be replaced later, so that the material taking and discharging can be completed in a small range, the space is not occupied after the material taking and discharging stand, the structure is simple, the maintenance is convenient, and the material taking and discharging stand is not easy to damage; It should be noted that, the swinging of the mechanical swing arm is realized by arranging the driving bevel gear 116 and the driven bevel gear 117, and also can be realized by the gear set 115, but the swinging realized by the gear set 115 can reduce the strength of the connection structure of the mechanical swing arm, so that the bearing effect of the mechanical swing arm is reduced;

Wherein, there are rugged grooves to some work piece surfaces, and then influence the adsorption effect, need to make further improvement to the pneumatic adsorption block 12 for this reason, there are gasbag rings 121 in the bottom of the pneumatic adsorption block 12, gasbag rings 121 are arranged two circles around the bottom edge of the pneumatic adsorption block 12 to the centre interval, gasbag rings 121 keep the state that swells all the time, and there are air holes 122 evenly spaced between two circles of gasbag rings 121, through gasbag rings 121 that set up, when the pneumatic adsorption block 12 adsorbs the work piece with recess, gasbag rings 121 can be fit in recess adaptively, in order to promote the adsorption effect of the pneumatic adsorption block 12; in order to relieve the weight of the end swing arm 113 required to be borne by the middle arm 112 alone when the middle arm is in rest, a bearing bracket 13 is symmetrically and fixedly arranged on one side edge of the machine body 1, and the top of the bearing bracket 13 can be propped under the end swing arm 113 when the mechanical swing arm is in rest and kept on a straight line.

In a specific embodiment, according to the embodiment shown in fig. 3-6, aiming at the situation that the placing surface of a workpiece is not a plane and can ensure the fixing effect only when more water is needed during freezing and fixing, a frame 8 is movably hinged on a processing material table 5, one side of the frame 8 is fixed through a movable buckle 81 arranged on the processing material table 5, the frame 8 can be turned over and opened at will, the outer dimension of the frame 8 is adapted to the outer dimension of the processing material table 5, a sealing adhesive tape is arranged between the frame 8 and the processing material table 5 to ensure the contact tightness, a temporary container capable of storing water is formed on the table surface of the processing material table 5 through the frame, after a certain amount of water is injected into the table surface, a part of workpiece is immersed into the table surface, and after the water is condensed, the workpiece can be fixed; when a part of small workpieces are required to be positioned and placed, according to the method shown in fig. 5 and 6, a guide rod 91 is fixedly arranged on one side of a frame 8, the guide rod 91 is connected with a positioning frame 9 in a sliding manner, the positioning frame 9 slides along the direction of the guide rod 91, a positioning block 92 is slidably arranged on the positioning frame 9, a part of the positioning block 92 protrudes, after the workpieces are placed on a processing material table 5, length measurement scales are arranged on the guide rod 91 and the positioning frame 9, after the workpieces are placed on the processing material table 5, the positioning frame 9 and the positioning block 92 can be shifted by referring to the length measurement scales, so that the workpieces can be moved to preset processing positions, and the processing positioning accuracy is ensured; meanwhile, in order to facilitate the simultaneous movement of three positioning frames 9, as shown in fig. 4 and 5, two ends of the positioning frames 9 mutually protrude and extend, a clamping groove 93 is formed in one end of each positioning frame 9, a clamping protrusion matched with the clamping groove 93 is formed in the other end of each positioning frame 9, the positioning frames 9 on the three processing material tables 5 are movably connected together through the clamping groove 93 and the clamping protrusion, and when one of the positioning frames 9 moves, the other two positioning frames 9 can move along; in order to facilitate watering of the workpiece, the positioning frame 9 is provided with the bamboo joint pipe 10, the bamboo joint pipe 10 moves along with the positioning frame 9, and the bamboo joint pipe 10 can be bent in a universal manner according to water injection requirements and enables the water outlet to be kept at a fixed position.

The foregoing examples have shown only the preferred embodiments of the invention, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that modifications, improvements and substitutions can be made by those skilled in the art without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. A multi-station cnc engraving and milling machine comprising: a bed (1); the transverse shaft (2) is transversely arranged at the edge of one side of the lathe bed (1); characterized by further comprising: a machining shaft (3) which is commonly mounted on the transverse shaft (2); a feeding table (4) which is arranged on the lathe bed (1) in a driving way and is positioned below the processing shaft (3); the processing material table (5) is internally provided with a cavity and the bottom is sealed by a bottom plate (51), the processing material table (5) is uniformly arranged on the feeding table (4) according to the number of the processing shafts (3), and the processing material table (5) is made of metal with excellent heat conductivity; a dividing plate (53) which is uniformly arranged in the processing material table (5) at intervals and divides the internal cavity of the processing material table (5) into a plurality of independent small cavities; the drainage plate (54) is centrally arranged in an independent small cavity in the processing material table (5), one end of the drainage plate is connected with the cavity wall, and a return port (56) is reserved between the other end of the drainage plate and the cavity wall; the flow limiting plates (55) arch in the middle, the two sides of the top surface are bent downwards, the flow limiting plates (55) are filled in the independent small cavities, and gaps are reserved between the flow limiting plates (55) and the inner top surfaces of the independent small cavities; the pipeline joints (52) are uniformly arranged on the outer side wall of the processing material table (5) in a pair-by-pair mode at intervals, each group of pipeline joints (52) corresponds to one independent small cavity, and the pipeline joints (52) are positioned on one side opposite to the backflow port (56); one of the two pipe joints (52) is connected with fluid with the angle of minus five to ten degrees, and the fluid is discharged from the other pipe joint (52) through the backflow port (56); the mechanical swing arm is arranged on one side of the bed body (1) far away from the transverse shaft (2); the pneumatic adsorption blocks (12) are uniformly arranged on the mechanical swing arm at intervals of the number of the processing material tables (5).

2. A multi-station cnc engraving and milling machine as recited in claim 1, wherein said mechanical swing arm includes: a hydraulic cylinder (11) which is arranged on the bed (1) and is far away from one side of the transverse shaft (2); a main arm (111) mounted on a movable rod of the hydraulic cylinder (11); an intermediate arm (112) having one end rotatably connected to the main arm (111); a tip swing arm (113) one end of which is rotatably connected to the other end of the intermediate arm (112); a motor (114) provided on the main arm (111); the middle arm (112) and the motor (114) are driven by a gear set (115); a drive bevel gear (116) fixed to the main arm (111) and the end swing arm (113) with the same rotation axis; and driven bevel gears (117) which are arranged on the middle arm (112) in a rotating way through a rotating rod, wherein the two driven bevel gears (117) are respectively meshed with the driving bevel gears (116) on the two sides.

3. A multi-station engraving and milling machine as claimed in claim 1, characterized in that the top surface of said processing table (5) is provided with criss-cross reinforcing grooves (6).

4. A multi-station cnc engraving and milling machine as recited in claim 3, further comprising: and soaking strips (7) are uniformly arranged at the top of the cavity in the processing material table (5) at intervals.

5. A multi-station cnc engraving and milling machine as recited in claim 4, further comprising: a side frame (8), one side of which is hinged with the processing material table (5), and the other side of which is fixed by a movable buckle (81) arranged on the processing material table (5); the outer dimension of the frame (8) is matched with the outer dimension of the processing material table (5), and a sealing rubber strip is arranged between the frame (8) and the processing material table (5).

6. A multi-station cnc engraving and milling machine as recited in claim 5, further comprising: the positioning frame (9) is slidably arranged on one side of the frame (8) through a guide rod (91); the positioning block (92) is arranged on the positioning frame (9) in a sliding manner.

7. A multi-station engraving and milling machine according to claim 6, characterized in that the two ends of said positioning frame (9) are extended in a protruding way, wherein one end is provided with a clamping groove (93) and the other end is provided with a clamping protrusion which is matched into said clamping groove (93).

8. A multi-station cnc engraving and milling machine as recited in claim 7, further comprising: the bamboo joint pipe (10) is arranged on the locating frame (9) and moves along with the locating frame (9).

9. A multi-station engraving and milling machine as claimed in claim 2, characterized in that said pneumatic adsorbing block (12) further comprises: the air bag rings (121) are arranged around the bottom of the pneumatic adsorption block (12) at intervals, and air holes (122) are uniformly formed between the two air bag rings (121) at intervals.

10. A multi-station cnc engraving and milling machine as recited in claim 9, further comprising: the bearing brackets (13) are symmetrically and fixedly arranged at the edge of one side of the lathe bed (1) and are contacted with the mechanical swing arms in a matching way.