CN115415800A - Turning and milling combined machining center - Google Patents

Abstract

The invention discloses a turning and milling combined machining center, which belongs to the technical field of cold machining machine tool equipment and comprises a machine body, a main shaft box and a combined power head, wherein the main shaft box is connected with the machine body through a Y-axis lifting mechanism, the combined power head is arranged on a combined sliding table, the combined sliding table is connected with the machine body, the combined sliding table can drive the combined power head to rotate around a B axis vertical to the combined sliding table and translate along an X axis and a Z axis through a combined driving mechanism, and the X axis, the Y axis and the Z axis are vertical to each other in pairs. During machining, a workpiece is arranged at the tail end of a main shaft box, a plurality of cutters are arranged on a combined power head, and the main shaft is driven to lift along a Y axis by a Y axis lifting mechanism; the combined sliding table drives the combined power head to rotate around the B axis and translate along the X axis and the Z axis through the combined driving mechanism, and turning and milling combined machining is achieved. The invention reduces the accumulated error of the power head and has high precision; the load of the combined sliding table is relatively light, and the response speed is high; the whole weight of combination slip table is less, reduces and quivers the line phenomenon.

Description

Turning and milling combined machining center

Technical Field

The invention belongs to the technical field of cold machining machine tool equipment, and particularly relates to a turning and milling combined machining center.

Background

Turning and milling are advanced cutting and machining methods which utilize the combined motion of milling cutter rotation and workpiece rotation to realize cutting and machining of workpieces and enable the workpieces to meet use requirements in various aspects such as shape precision, position precision and machined surface integrity. Turning and milling combined machining is not a method for combining turning and milling into a machine tool, but utilizes turning and milling combined motion to finish machining of various surfaces, and is a new cutting theory and cutting technology generated under the condition that the current numerical control technology is greatly developed.

In order to improve the flexibility of turn-milling composite machining, some turn-milling composite centers are set to be in a five-axis linkage structure, specifically, a five axis consists of an X-axis sliding table, a Y-axis sliding table, a Z-axis sliding table, a B-axis rotating table and a main shaft (also called as a C axis), a workpiece is clamped on the main shaft, the main shaft controls the workpiece to rotate, a power head is respectively controlled to move towards three mutually perpendicular directions by the X-axis sliding table, the Y-axis sliding table and the Z-axis sliding table, and the power head is controlled to rotate by the B-axis rotating table so as to change a machining position or angle, and the five-axis linkage machining is realized.

Because the five existing linkage structures all establish X axle slip table and Y axle slip table, Z axle slip table, B axle revolving stage in unit head one side, consequently have following defect:

1. the four shafts have inevitable stroke errors, and the errors are accumulated and superposed to cause larger accumulated error and low precision of the power head.

2. The sliding table serving as the base layer needs to bear the weight of the power head and other three shafts, and the load is large, so that the response speed is low.

3. The whole weight of one side of the power head is large, the vibration amplitude of the machine is large during working, and chattering is easy to occur when the centering and small parts are used for tapping.

Disclosure of Invention

The invention aims to provide a turning and milling combined machining center, and aims to solve the technical problems that in the prior art, the power head of the turning and milling combined machining center is large in accumulated error, low in machining precision, low in response speed of a sliding table, large in vibration amplitude of the power head, and prone to chatter marks when small and medium-sized parts are machined.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a turning and milling combined machining center comprises a machine body, a main shaft box and a combined power head for mounting a plurality of cutters, wherein a main shaft driven by a power component is horizontally arranged on the main shaft box, and the main shaft box is connected with the machine body through a Y-axis lifting mechanism and is used for driving the main shaft to lift along a Y axis; the combination unit head sets up on the combination slip table, the combination slip table links to each other with the fuselage, the combination slip table is equipped with combination actuating mechanism for drive combination unit head is rotatory around the B axle of perpendicular to combination slip table, along X axle and Z axle translation, two liang mutually perpendicular in X axle, Y axle and Z axle, and X axle and Y axle all personally submit the acute angle setting with the level, the Z axle is on a parallel with the main shaft, and sets up along fuselage length direction.

Preferably, the combined driving mechanism comprises a B-axis rotating mechanism, an X-axis moving mechanism and a Z-axis moving mechanism, the combined sliding table comprises an X-axis sliding table and a Z-axis sliding table, and the B-axis rotating mechanism is connected with the combined power head, arranged on the X-axis sliding table and used for driving the combined power head to rotate around a B axis vertical to the combined sliding table; the X-axis moving mechanism is arranged on the X-axis sliding table and connected with the Z-axis sliding table below the X-axis sliding table and is used for driving the X-axis sliding table to move on the Z-axis sliding table along the X-axis direction; the Z-axis moving mechanism is arranged on the Z-axis sliding table and connected with the machine body below the Z-axis sliding table, and the Z-axis moving mechanism is used for driving the Z-axis sliding table to move along the Z-axis direction on the machine body.

Preferably, the B-axis rotating mechanism comprises a conventional rotating motor and a rotary table, an output shaft of the rotating motor is coaxially arranged with the rotary table and used for driving the rotary table to rotate, the combined power head is arranged on the rotary table, and the rotating motor is arranged in the X-axis sliding table.

Preferably, the Y-axis lifting mechanism, the X-axis moving mechanism and the Z-axis moving mechanism have the same structure and respectively comprise a driving motor, a lead screw nut, a sliding block and a guide rail, the lead screw is driven by the driving motor, the lead screw nut is matched with the lead screw, and the sliding block is matched with the guide rail in a sliding manner; the guide rail and the spindle box of the Y-axis lifting mechanism are arranged on a support at the front end of the machine body, the spindle box and the sliding block are fixed on a Y-axis sliding table, the Y-axis sliding table is in sliding fit with the guide rail on the support, and a driving motor of the Y-axis lifting mechanism is arranged at the top of the support; the screw rod nuts and the slide blocks of the Y-axis lifting mechanism, the X-axis moving mechanism and the Z-axis moving mechanism are respectively arranged on the main shaft box, the X-axis sliding table and the Z-axis sliding table; the guide rail of the X-axis moving mechanism is arranged on the Z-axis sliding table, and the driving motor of the X-axis moving mechanism is arranged at the top of the upper end of the Z-axis sliding table; the guide rail of the Z-axis moving mechanism is arranged on the machine body, and the driving motor of the Z-axis moving mechanism is arranged on the right side of the machine body.

Preferably, the headstock includes power unit and main shaft input wheel, power unit includes drive mechanism and main shaft, drive mechanism sets up inside the support, the main shaft input wheel sets up in the outside of support, and by main motor drive, the main shaft links to each other with drive mechanism's output, the main shaft sets up in the one side of support towards the combination unit head, the end of main shaft links to each other with the chuck seat.

Preferably, the bottom of the chuck seat is provided with a guard plate.

Preferably, a collecting tank for containing metal chips is arranged on the front side of the machine body, a base inclined towards the front side is arranged at the top of the rear side of the machine body, the support is vertically arranged at the left end of the base, and a box body of the spindle box is arranged on the support; the Z-axis sliding table is arranged on the right side of the base, a guide rail of the Z-axis moving mechanism is arranged on the inclined plane of the base, and the driving motor is arranged at the right end of the base.

Preferably, the combined power head comprises a tool apron, a high-speed cutter shaft and a low-speed cutter shaft, the high-speed cutter shaft and the low-speed cutter shaft are used for installing cutters, the tool apron is connected with the X-axis sliding table through a B-axis rotating mechanism, the high-speed cutter shaft and the low-speed cutter shaft are both horizontally arranged on the tool apron, the high-speed cutter shaft and the low-speed cutter shaft are arranged in parallel and are one or more, and the high-speed cutter shaft and the low-speed cutter shaft are arranged in two rows in parallel; the low-speed cutter shaft is driven by a driving part, and the high-speed cutter shaft is driven by a high-speed motor.

Preferably, the driving part comprises a low-speed motor and a transmission assembly, the low-speed motor is connected with the transmission assembly through a transmission part, the transmission assembly comprises a plurality of gears which are meshed in sequence, and a plurality of low-speed cutter shafts are coaxially fixed with the corresponding gears; the low-speed motor is used for driving the gear and the low-speed cutter shaft to rotate.

Preferably, the transmission member is a coupling, a gear transmission set or a belt transmission set.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: compared with the prior art, the main shaft box is arranged on the left side of the machine body, the combined sliding table is arranged on the right side of the machine body, the combined power head with a plurality of cutters is arranged on the combined sliding table, and the main shaft box drives the main shaft to lift along the Y axis through the Y axis lifting mechanism; the combined sliding table is driven by the combined driving mechanism, so that the combined power head rotates around a B axis vertical to the combined sliding table and translates along an X axis and a Z axis, and the X axis, the Y axis and the Z axis are vertical to each other in pairs; during machining, a workpiece is arranged at the tail end of the main shaft, and a cutter is arranged on the combined power head, so that turning and milling combined machining can be realized. The invention reduces the accumulated error at one side of the power head, and has high processing precision; the load of the sliding table on one side of the power head is relatively light, and the response speed is improved; the whole weight of one side of the power head is small, so that the chatter phenomenon is not easy to occur, and the power head can be suitable for processing medium and small parts.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of a turning and milling composite machining center provided in an embodiment of the present invention;

FIG. 2 is a schematic view of a rear view of the turning and milling center of FIG. 1;

FIG. 3 is a left side view of the turning and milling composite center of FIG. 1;

FIG. 4 is a schematic structural view of the spindle head and the Y-axis lifting mechanism in FIG. 1;

FIG. 5 is a rear view of the headstock and the Y-axis lift mechanism of FIG. 4;

FIG. 6 is a schematic diagram of the configuration of the combination powerhead of FIG. 1;

FIG. 7 is a rear block diagram of the combination power head of FIG. 6;

FIG. 8 is a side view of the combination power head of FIG. 6;

in the figure: 1-machine body, 2-main spindle box, 3-combined power head, 31-tool apron, 32-high-speed cutter shaft, 33-low-speed cutter shaft, 34-low-speed motor, 35-gear and 36-high-speed motor; 4-main shaft, 5-X shaft sliding table, 6-Z shaft sliding table, 7-rotating motor, 8-rotary table, 9-driving motor, 10-screw rod, 11-screw rod nut, 12-slide block, 13-guide rail, 14-bracket, 15-collecting tank, 16-base, 17-main shaft input wheel, 18-chuck seat, 19-guard plate, 20-guide rail seat, 21-chip removal port and 22-tool rest.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.

Referring to fig. 1-3, the turning and milling combined machining center provided by the invention comprises a machine body 1, a spindle box 2 and a combined power head 3 for mounting a plurality of cutters, wherein a spindle 4 driven by a power component is horizontally arranged on the spindle box 2, and the spindle box 2 is connected with the machine body 1 through a Y-axis lifting mechanism and is used for driving the spindle 4 to lift along a Y axis; the combination unit head 3 sets up on the combination slip table, the combination slip table links to each other with fuselage 1, the combination slip table is equipped with combination actuating mechanism for drive combination unit head 3 around the perpendicular to combination slip table the B rotation of axle, along X axle and Z axle translation, two liang of mutually perpendicular in X axle, Y axle and Z axle, and X axle and Y axle all personally submit acute angle setting with the level, the Z axle is on a parallel with main shaft 4, and sets up along 1 length direction of fuselage. The combined driving mechanism comprises a B-axis rotating mechanism, an X-axis moving mechanism and a Z-axis moving mechanism, the combined sliding table comprises an X-axis sliding table 5 and a Z-axis sliding table 6, and the B-axis rotating mechanism is connected with the combined power head 3, arranged on the X-axis sliding table 5 and used for driving the combined power head 3 to rotate around a B axis vertical to the combined sliding table; the X-axis moving mechanism is arranged on the X-axis sliding table 5 and connected with the Z-axis sliding table 6 below the X-axis moving mechanism, and the X-axis moving mechanism is used for driving the X-axis sliding table 5 to move on the Z-axis sliding table 6 along the X-axis direction; the Z-axis moving mechanism is arranged on the Z-axis sliding table 6 and connected with the machine body 1 below the Z-axis sliding mechanism, and the Z-axis moving mechanism is used for driving the Z-axis sliding table 6 to move on the machine body 1 along the Z-axis direction.

By adopting the technical scheme, the part is clamped at the tail end of the main shaft, and the cutter can be fixed on the combined power head. When the milling machine is used for processing, the part and the cutter rotate simultaneously, and the effect of compounding the milling machine is achieved. Can play the ascending and descending of main shaft in Y axle side through Y axle elevating system, realize the rotation of combined power head on X axle slip table through B axle rotary mechanism, utilize X axle moving mechanism and Z axle moving mechanism to realize the translation of combined power head in X axle and Z axle side, can realize four-axis, four-axis half, three kinds of processing methods of five-axis linkage:

four-axis linkage means that a rotary table of an axis B does not rotate, and a cutter faces a main shaft for processing, which is the most traditional processing mode;

the four-axis semi-linkage is that a rotary table of the B axis rotates, the cutter is adjusted to a specific orientation and then stops rotating, and then the cutter is machined at a specific angle and is suitable for machining a specific part of a part;

the five-axis linkage is that the orientation of a cutter is adjusted in real time by a rotary table of a B axis in the machining process, the machining angle is changed while turning and milling are carried out, and the five-axis linkage is suitable for machining parts with special shapes.

In an embodiment of the present invention, as shown in fig. 6 to 8, the combined power head 3 includes a tool post 31, and a high-speed arbor 32 and a low-speed arbor 33 for installing tools, the tool post 31 is connected to the X-axis sliding table 5 through a B-axis rotating mechanism, both the high-speed arbor 32 and the low-speed arbor 33 are horizontally disposed on the tool post 31, both the high-speed arbor 32 and the low-speed arbor 33 are disposed in parallel, and are one or more, and the plurality of high-speed arbors 32 and the plurality of low-speed arbors 33 are disposed in two rows in parallel; the low-speed cutter shaft 33 is driven by a driving part, the high-speed cutter shaft 32 is driven by a high-speed motor 36, and an output shaft of the high-speed motor is coaxially fixed with the high-speed cutter shaft. By using the combined power head shown in fig. 6, the plurality of high-speed cutter shafts and the plurality of low-speed cutter shafts are arranged in a row, and the corresponding cutter shafts are moved to the processing position for processing.

During specific manufacturing, as shown in fig. 6, the driving part comprises a low-speed motor 34 and a transmission assembly, the low-speed motor 34 is connected with the transmission assembly through a transmission part, the transmission assembly comprises a plurality of gears 35 which are meshed in sequence, and a plurality of low-speed cutter shafts 33 are coaxially fixed with the corresponding gears 35; the low-speed motor 34 is used for driving the gear 35 and the low-speed cutter shaft 33 to rotate.

The transmission member may be a coupling, a gear transmission set or a belt transmission set, which are not shown in the drawings. The rotating shafts of the gears are sequentially arranged in the tool apron in parallel from top to bottom, the other end of each rotating shaft can be provided with a gear or a belt pulley, and the gears can be linked through the low-speed motor.

During specific manufacturing, the gear 35 is connected with the driving gear at the other end through a transmission shaft, the output shaft of the low-speed motor 34 is connected with the rotating shaft of one of the driving gears through a coupler, and the transmission shafts which are adjacent up and down drive the rotation of the transmission shafts through the driving gears which are meshed with each other. Or, the gear 35 is connected with the belt pulleys at the other end in a one-to-one correspondence manner through a transmission shaft, the belt pulleys are connected with the driving belt wheel through a belt, and the output shaft of the low-speed motor 34 is connected with the rotating shaft of the driving belt wheel through a coupler. These transmission structures are all in the prior art and are not described in detail herein.

The high-speed motor drives the high-speed tool apron to rotate at a high speed, the rotation speed is up to 1-2 thousands of revolutions, but the force is small, so that the method is suitable for processing technologies with low resistance and high precision requirements such as chamfering processing and the like; the low-speed motor drives the low-speed cutter shaft to rotate through the gears which are sequentially meshed, the rotation speed is low (3-4 thousand revolutions), but the force is large, and the low-speed motor is suitable for machining processes with large resistance, low precision requirements and the like, such as tapping and the like. By adopting the combined power head, products with different process requirements can be processed, the power heads with different speeds do not need to be frequently replaced, an operator can freely switch according to needs, the combined power head is suitable for parts of different types, the use is convenient, and the processing efficiency can be improved.

In an embodiment of the present invention, as shown in fig. 6-8, the B-axis rotating mechanism includes a rotating motor 7 and a rotary table 8, an output shaft of the rotating motor 7 is coaxially disposed with the rotary table 8 and is used for driving the rotary table to rotate, the combined power head 3 is disposed on the rotary table 8, and the rotating motor 7 is disposed in the X-axis sliding table 5. During specific manufacturing, a driving gear can be installed at the tail end of the rotating motor, an inner gear meshed with the rotating motor is installed in an inner hole of the rotating platform, the rotating platform is driven to rotate through the rotating motor, and then the tool apron of the combined power head is driven to rotate.

During specific manufacturing, as shown in fig. 1-5, the Y-axis lifting mechanism, the X-axis moving mechanism and the Z-axis moving mechanism have the same structure, and each of the Y-axis lifting mechanism, the X-axis moving mechanism and the Z-axis moving mechanism comprises a driving motor 9, a lead screw 10, a lead screw nut 11, a slider 12 and a guide rail 13, wherein the lead screw 10 is driven by the driving motor 9, the lead screw nut 11 is matched with the lead screw 10, and the slider 12 is in sliding fit with the guide rail 13; the guide rail 13 and the spindle box 2 of the Y-axis lifting mechanism are both arranged on a support 14 at the front end of the machine body 1, the spindle box 2 and the slide block 12 are both fixed on a Y-axis sliding table, the Y-axis sliding table is in sliding fit with the guide rail 13 on the support 14, and the driving motor 9 of the Y-axis lifting mechanism is arranged at the top of the support 14; the screw rod nuts 11 and the slide blocks 12 of the Y-axis lifting mechanism, the X-axis moving mechanism and the Z-axis moving mechanism are respectively arranged on the spindle box 2, the X-axis sliding table 5 and the Z-axis sliding table 6; the guide rail 13 of the X-axis moving mechanism is arranged on the Z-axis sliding table 6, and the driving motor 9 of the X-axis moving mechanism is arranged at the top of the upper end of the Z-axis sliding table 6; the guide rail 13 of the Z-axis moving mechanism is arranged on the machine body 1, and the driving motor 9 of the Z-axis moving mechanism is arranged on the right side of the machine body 1. By adopting the Y-axis lifting mechanism, the X-axis moving mechanism and the Z-axis moving mechanism which are in the structures, the screw rod is driven to rotate by the driving motor, the spindle box 2, the X-axis sliding table 5 and the Z-axis sliding table 6 are driven to move along with the rotation of the screw rod, the translation of the spindle and the translation of the combined power head can be controlled, and the three moving directions are mutually perpendicular.

As a preferred structure, as shown in fig. 2, a collecting tank 15 for containing metal chips is arranged on the front side of the machine body 1, and a chip removal port 21 is arranged on the side wall of the machine body on the right side of the collecting tank, so that the metal chips collected in the machining process can be conveniently and timely removed; a base 16 inclined towards the front side is arranged at the top of the rear side of the machine body 1, the support 14 is vertically arranged at the left end of the base 16, and the box body of the spindle box 2 is arranged on the support 14; the Z-axis sliding table 6 is arranged on the right side of the base 16, the guide rail 13 of the Z-axis moving mechanism is arranged on the inclined plane of the base 16, and the driving motor 9 is arranged at the right end of the base 16. During specific manufacturing, the inclination of the base can adopt a 45-degree design, and the base and the machine body can adopt a split assembly type structure, so that the processing and manufacturing are convenient. By adopting the structure, the purpose that the support is vertical to the X-axis sliding table and the Z-axis sliding table can be realized.

In addition, the bottom of the support can be fixed on the base through the U-shaped mounting seat with the downward opening, and the design is convenient to adjust the position of the support on the base according to actual needs. Meanwhile, in order to facilitate the replacement of the tool at any time during the machining process, a tool holder 22 may be fixed at a front side position of the X-axis slide table.

In an embodiment of the present invention, as shown in fig. 4 and 5, the spindle box 2 includes a power unit and a spindle input wheel 17, the power unit includes a transmission mechanism and a spindle 4, the transmission mechanism is disposed inside the support 14, the spindle input wheel 17 is disposed outside the support 14 and is driven by a main motor (not shown in the figure), the spindle input wheel may be a belt pulley, and the spindle is driven by an external belt and the main motor; the main shaft 4 is connected with the output end of the transmission mechanism, the main shaft 4 is arranged on one side, facing the combined power head 3, of the support 14, and the tail end of the main shaft 4 is connected with the chuck seat. In order to meet the requirement of light weight design, the bracket adopts a frame structure, the guide rail seats 20 can be designed on the frames at the front side and the rear side of the bracket, and the guide rails 13 are arranged on the side surfaces of the guide rail seats 20.

In actual production, the main shaft is arranged on the Y-axis sliding table, but similar effects can be achieved by arranging the main shaft on other sliding tables. In addition, during specific manufacturing, the main motor, the B-axis rotating mechanism, the Y-axis lifting mechanism, the X-axis moving mechanism and the Z-axis moving mechanism can be controlled by the control panel, the rotation of the rotary table and the translation of the X-axis sliding table, the Y-axis sliding table and the Z-axis sliding table are controlled by the control panel, the degree of automation is high, and automatic machining of parts can be achieved by inputting machining parameters on the control panel.

Further optimize above-mentioned technical scheme, as shown in fig. 4, set up backplate 19 in the bottom of chuck seat 18, can shelter from the support inside with the help of the backplate, can avoid the metal fillings in the course of working to splash and get into support and headstock in, play the guard action to inside power part and Y axle elevating system.

In conclusion, the invention has the advantages of compact structure and high processing precision, three machining modes of four-axis, four-axis and half-axis and five-axis linkage can be realized through the B-axis rotating mechanism, the Y-axis lifting mechanism, the X-axis moving mechanism and the Z-axis moving mechanism, the machining modes are diverse, and the operation is flexible and convenient; the chuck on the chuck seat at the tail end of the main shaft can clamp parts, the high-speed cutter shaft and the low-speed cutter shaft can fix various cutters, and the parts and the cutters rotate simultaneously during machining, so that a turning and milling composite effect is realized. Meanwhile, in the machining process, the Y-axis sliding table controls the main shaft to translate, the X-axis sliding table and the Z-axis sliding table can control the power head to translate, the moving directions controlled by the three sliding tables are mutually vertical, and the machining of specific parts of parts and the machining of parts with special shapes are realized in a turning and milling combined machining mode; meanwhile, the product processing precision is high, and the product processing quality is improved.

In the description above, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and thus the present invention is not limited to the specific embodiments disclosed above.

Claims (10)

1. The utility model provides a turning and milling combined machining center which characterized in that: the combined power head is used for mounting a plurality of cutters, a main shaft driven by a power component is horizontally arranged on the main shaft box, and the main shaft box is connected with the machine body through a Y-axis lifting mechanism and used for driving the main shaft to lift along a Y axis; the combination unit head sets up on the combination slip table, the combination slip table links to each other with the fuselage, the combination slip table is equipped with combination actuating mechanism for drive combination unit head is around the B rotation of perpendicular to combination slip table, along X axle and Z axle translation, two liang of mutually perpendicular in X axle, Y axle and Z axle, and X axle and Y axle all personally submit acute angle setting with the level, the Z axle is on a parallel with the main shaft, and sets up along fuselage length direction.

2. The turn-milling composite machining center according to claim 1, characterized in that: the combined driving mechanism comprises a B-axis rotating mechanism, an X-axis moving mechanism and a Z-axis moving mechanism, the combined sliding table comprises an X-axis sliding table and a Z-axis sliding table, and the B-axis rotating mechanism is connected with the combined power head, arranged on the X-axis sliding table and used for driving the combined power head to rotate around a B axis vertical to the combined sliding table; the X-axis moving mechanism is arranged on the X-axis sliding table and connected with the Z-axis sliding table below the X-axis sliding table and is used for driving the X-axis sliding table to move on the Z-axis sliding table along the X-axis direction; the Z-axis moving mechanism is arranged on the Z-axis sliding table and connected with the machine body below the Z-axis sliding table, and the Z-axis moving mechanism is used for driving the Z-axis sliding table to move along the Z-axis direction on the machine body.

3. The turn-milling composite machining center according to claim 2, characterized in that: the B-axis rotating mechanism comprises a conventional rotating motor and a rotary table, an output shaft of the rotating motor is coaxially arranged with the rotary table and used for driving the rotary table to rotate, the combined power head is arranged on the rotary table, and the rotating motor is arranged in the X-axis sliding table.

4. The turn-milling composite machining center according to claim 2, characterized in that: the Y-axis lifting mechanism, the X-axis moving mechanism and the Z-axis moving mechanism have the same structure and respectively comprise a driving motor, a lead screw nut, a sliding block and a guide rail, wherein the lead screw is driven by the driving motor, the lead screw nut is matched with the lead screw, and the sliding block is in sliding fit with the guide rail; the guide rail and the spindle box of the Y-axis lifting mechanism are both arranged on a support at the front end of the machine body, the spindle box and the sliding block are both fixed on a Y-axis sliding table, the Y-axis sliding table is in sliding fit with the guide rail on the support, and a driving motor of the Y-axis lifting mechanism is arranged at the top of the support; the screw rod nuts and the slide blocks of the Y-axis lifting mechanism, the X-axis moving mechanism and the Z-axis moving mechanism are respectively arranged on the spindle box, the X-axis sliding table and the Z-axis sliding table; the guide rail of the X-axis moving mechanism is arranged on the Z-axis sliding table, and the driving motor of the X-axis moving mechanism is arranged at the top of the upper end of the Z-axis sliding table; the guide rail of the Z-axis moving mechanism is arranged on the machine body, and the driving motor of the Z-axis moving mechanism is arranged on the right side of the machine body.

5. The turn-milling composite machining center according to claim 4, characterized in that: the spindle box comprises a power part and a spindle input wheel, the power part comprises a transmission mechanism and a spindle, the transmission mechanism is arranged inside the support, the spindle input wheel is arranged outside the support and driven by a main motor, the spindle is connected with the output end of the transmission mechanism, the spindle is arranged on one side of the support, facing the combined power head, and the tail end of the spindle is connected with the chuck seat.

6. The turn-milling composite machining center according to claim 5, characterized in that: and a protective plate is arranged at the bottom of the chuck seat.

7. The turn-milling composite machining center according to claim 4, characterized in that: a collecting tank for containing metal chips is arranged on the front side of the machine body, a base inclining towards the front side is arranged at the top of the rear side of the machine body, the support is vertically arranged at the left end of the base, and a box body of the spindle box is arranged on the support; the Z-axis sliding table is arranged on the right side of the base, a guide rail of the Z-axis moving mechanism is arranged on the inclined plane of the base, and the driving motor is arranged at the right end of the base.

8. The turn-milling composite machining center according to any one of claims 2 to 7, characterized in that: the combined power head comprises a tool apron, a high-speed tool shaft and a low-speed tool shaft, wherein the high-speed tool shaft and the low-speed tool shaft are used for installing tools; the low-speed cutter shaft is driven by a driving part, and the high-speed cutter shaft is driven by a high-speed motor.

9. The turn-milling composite machining center according to claim 8, characterized in that: the driving part comprises a low-speed motor and a transmission assembly, the low-speed motor is connected with the transmission assembly through a transmission part, the transmission assembly comprises a plurality of gears which are meshed in sequence, and a plurality of low-speed cutter shafts are coaxially fixed with the corresponding gears; and the low-speed motor is used for driving the gear and the low-speed cutter shaft to rotate.

10. The turn-milling composite machining center according to claim 9, characterized in that: the transmission part is a coupler, a gear transmission set or a belt transmission set.

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