CN203245655U - Numerical control double-shaft drilling and milling power head for machining valve body - Google Patents

Abstract

The utility model relates to a numerically controlled double-axis drilling and milling power head for processing a valve body. A square ram is installed on a ram seat. The milling shaft frame, the eccentric holes of the two milling shaft frames are respectively sleeved with drilling and milling shafts, the rear end of the square ram is connected to the headstock, the other end of the headstock is connected to the differential feed box, and the differential feed box is connected to the servo motor. The upper end of the spindle box is connected with the spindle AC frequency conversion motor through the connecting body, the shift fork oil cylinder on the opposite side of the motor is connected with the spindle box, the lower end of the spindle box is connected with the motor frame, the motor frame is connected with the servo motor, and the spindle passes through the square ram. One end of the main shaft is connected on the supporting turntable of the milling spindle frame, and the other end is connected in the headstock, and the center of the main shaft is sleeved with a mandrel. The utility model can be equipped with a tool magazine to achieve the purpose of high efficiency and safety, and can be used in conjunction with the rotary worktable to complete multi-directional processing in one clamping.

Description

CNC dual-axis drilling and milling power head for valve body processing

Technical field:

The utility model relates to a numerical control double-axis drilling and milling power head for valve body processing. It is mainly used to process the casting port of the valve body blank and the rough machining of the flange surface, and the CNC drilling and milling compound processing power head for flange bolt hole drilling. The valve body suitable for processing by the utility model includes: gate valve, globe valve, check valve, Pump body parts with flanges such as butterfly valves and pressure reducing valves. the

Background technique:

At present, the casting of medium and large valves in China is still dominated by sand casting. Most of the blank sprues are cut by hand with acetylene, the height of the cut is uneven and the surface hardness is high. The main disadvantage of the turning process is that the turning tool is intermittent cutting, and the tool bears the impact load. Large, it is easy to chip, and the damage to the machine tool is also large. At present, the flanges in the valve body are more elliptical, and most of them are processed by turning, which is basically in intermittent cutting, with long processing time and poor surface quality. After the turning is completed, the flange bolts must be drilled with a rocker Hole, drilling efficiency and accuracy are very limited. the

Utility model content:

The utility model provides a numerically controlled two-axis drilling and milling power head due to the shortcomings of the above-mentioned traditional technology. The tool magazine can be configured for automatic tool change, and it can be used in conjunction with the rotary table to complete multi-directional machining in one clamping. Used in conjunction with the CNC double-slider power head, the rough and finish machining processes of the valve body can be completely separated, and the durability of the tool and the precision of the workpiece can be improved. The technical scheme for realizing the above-mentioned purpose is as follows:

Valve body processing CNC dual-axis drilling and milling power head, including ram seat 20, square ram 21, spindle box 24, differential feed box 30, fork cylinder 41, square ram 21 installed on ram seat 20 , the rear end of the square ram 21 is connected to the spindle box 24, the other end of the spindle box 24 is connected to the differential feed box 30, the differential feed box 30 is connected to the servo motor 73, and the upper end of the spindle box 24 is connected to the main shaft AC through the coupling body 46 The variable frequency motor 47, the shift fork oil cylinder 41 on the opposite side of the motor is connected to the main shaft box 24, the lower end of the main shaft box 24 is connected to a motor frame 88, the motor frame 88 is connected to the servo motor 86, the main shaft 23 passes through the square ram 21, and one end is connected to the In the spindle box 24, the center of the main shaft 23 is sleeved with the mandrel 22, and the shift fork cylinder 41 has a shift fork block 44, which is characterized in that: it also includes a milling shaft frame supporting the turntable 17, and the front end of the square ram 21 is connected to the milling shaft The frame supports the turntable 17, and the other end of the main shaft 23 is connected to the milling axle support turntable 17. There are two symmetrical inner holes on the milling axle support turntable 17, and the milling axle frame 2 is placed in each inner hole, and the milling axle frame 2 There are eccentric holes on the eccentric holes, each of which is sleeved with a drilling and milling shaft 1, and the center of the drilling and milling shaft 1 is provided with a taper hole, and the rear end of the taper hole is provided with a tool automatic broaching mechanism 16. the

The milling feed motion is completed by the rotation of the milling spindle support turntable 17 or the milling spindle support 2, or it can be completed by the milling spindle support rotating disk 17 and the milling spindle support 2 linkage rotation. the

Preferably, there is a third bearing 15 in the milling shaft frame 2, and the drilling and milling shaft 1 is fixed on the milling shaft frame 2 through the third bearing 15. The rear end of the automatic broaching mechanism 16 is provided with a loosening cylinder 8, and the middle part of the drilling and milling shaft 1 is provided with There is a second gear 4, which is socketed on the drilling and milling shaft 1, and a first gear shaft 7 is arranged symmetrically inside the supporting turntable 17 of the milling shaft frame, on which the first gear 3 is sleeved , the second gear 4 meshes with the first gear 3 to drive the drilling and milling shaft 1 to rotate, the rear end of the first gear shaft 7 is sleeved with a bearing 18 for fixing the first gear shaft 7 and the first gear 3, the drilling and milling shaft There is an internal cooling water outlet hole in the center of the tool, and the first worm wheel 6 is installed on the rear end of the milling shaft frame 2, and the second worm 91 is connected to the first worm wheel 6, and the first worm wheel 6 and the second worm 91 mesh to drive the milling shaft frame 2 Each of the two drilling and milling shafts 2 is equipped with a tool to realize synchronous rotation processing. The axial ends of each second worm 91 are connected with twenty-second bearings 93, and each second worm 91 drives a milling shaft. rack rotates. the

The two drilling and milling shafts 2 rotate to perform feed motion, and drive the mandrel 22 to pass through the differential feed box 30 to realize the control of driving and motion speed. the

Preferably, a first bevel gear shaft 48 and a second bevel gear shaft 49 are fixed to the middle part of the milling shaft support turntable 17, the first bevel gear shaft 48 is sleeved with a ninth bearing 52, and the second bevel gear shaft 49 is sleeved The eighth bearing 51 is connected, and the second bevel gear 92 is also sleeved on the second worm 91. The first bevel gear shaft 48 and the second bevel gear shaft 49 are used to drive the second bevel gear 92; each second worm 91 Adjacent ends of the second bevel gear 92 are respectively fixed, and the second bevel gear 92 drives the second worm 91 to rotate. the

Preferably, there is an output fourth shaft 40 on the main shaft AC variable frequency motor 47, and a high-low speed mechanism is installed on the output fourth shaft 40. The high-speed rotation is composed of the ninth gear 39 and the eleventh gear 43, and the low-speed rotation is composed of the eighth gear 38. 10. The tenth gear 42 is formed. The high and low speed switching is completed by the shift fork oil cylinder 41 driving the tenth gear 42 and the eleventh gear 43 on the fourth shaft 40 through the shift fork block 44 . The process of completing the movement realizes the high and low speed rotary motion of the drilling and milling axis 1. the

The taper hole at the center of the drilling and milling axis 1 is a 7:24 standard taper hole. the

The utility model can realize three-axis linkage processing. the

The utility model adopts a modular design, which is convenient for assembly, detection and maintenance. the

The utility model can be equipped with a tool magazine to achieve the purpose of high efficiency and safety, and can be used in conjunction with the rotary worktable to complete multi-directional processing in one clamping. the

Description of drawings:

Fig. 1 is the overall appearance diagram of the utility model. the

FIG. 2 is a partially enlarged view of FIG. 1 . the

FIG. 3 is a partially enlarged view of FIG. 1 . the

Fig. 4 is a main sectional view of the utility model. the

FIG. 5 is a partially enlarged view of FIG. 4 . the

FIG. 6 is a partially enlarged view of FIG. 4 . the

Fig. 7 is a top sectional view of the utility model. the

FIG. 8 is a partially enlarged view of FIG. 7 . the

FIG. 9 is a partially enlarged view of FIG. 7 . the

Fig. 10 is a sectional view along A-A direction in Fig. 7 . the

Fig. 11 is a cross-sectional view along B-B in Fig. 4 . the

Fig. 12 is a sectional view along C-C direction in Fig. 4 . the

Description of the serial numbers of the attached drawings: drilling and milling shaft 1, milling shaft frame 2, first gear 3, second gear 4, first bearing 5, first worm gear 6, first gear shaft 7, cutter release cylinder 8, second gear shaft 9. Front cover 10, second bearing 11, connecting sleeve 12, ram cover 13, connecting shaft 14, third bearing 15, tool automatic broaching mechanism 16, milling shaft support turntable 17, fourth bearing 18, third Gear 19, ram seat 20, square ram 21, mandrel 22, main shaft 23, headstock 24, fourth gear 25, second worm wheel 26, fifth bearing 27, first shaft 28, fifth gear 29, difference Fast feed box 30, first shaft sleeve 31, sixth bearing 32, second shaft 33, sixth gear 34, seventh gear 35, third shaft 36, seventh bearing 37, eighth gear 38, ninth gear 39. Fourth shaft 40, shift fork oil cylinder 41, tenth gear 42, eleventh gear 43, shift fork block 44, twenty-third bearing 45, connecting body 46, main shaft AC variable frequency motor 47, first bevel gear shaft 48. Second bevel gear shaft 49, first bevel gear 50, eighth bearing 51, ninth bearing 52, tenth bearing 53, ball screw 54, ball screw seat 55, eleventh bearing 56, twelfth Bearing 57, thirteenth bearing 58, adjusting tilt iron 59, fourteenth bearing 60, fifth shaft 61, fifteenth bearing 62, twelfth gear 63, differential body 64, shaft 65, thirteenth gear 66 , the sixteenth bearing 67, the fourteenth gear 68, the fifteenth gear 69, the sixteenth gear 70, the seventeenth bearing 71, the box cover 72, the servo motor 73, the seventeenth gear 74, the eighteenth bearing 75 , the third gear shaft 76, the nineteenth bearing 77, the twentieth bearing 78, the fourth gear shaft 79, the second shaft sleeve 80, the servo motor 81, the first synchronous pulley 82, the synchronous belt 83, the second synchronous belt Wheel 84, casing 85, servo motor 86, shaft coupling 87, motor frame 88, first worm screw 89, twenty-first bearing 90, second worm screw 91, second bevel gear 92, twenty-second bearing 93. the

Detailed ways:

Below in conjunction with accompanying drawing, the utility model is described in detail. Except the inventive point of the present utility model, all the other technologies are identical with the prior art. the

Valve body processing CNC dual-axis drilling and milling power head, including ram seat 20, square ram 21, milling shaft frame 2, milling shaft frame supporting turntable 17, spindle box 24, differential feed box 30, drilling and milling shaft 1 , the main shaft 23, the square ram 21 is installed on the ram seat 20, the front end of the square ram 21 is connected to the milling shaft support turntable 17, and two milling shaft supports 2 and the milling shaft support 2 are symmetrically installed on the milling shaft support turntable 17 There is an eccentric hole on the eccentric hole, each of which is sleeved with a drilling and milling shaft 1, the rear end of the square ram 21 is connected to the headstock 24, the other end of the headstock 24 is connected to the differential feed box 30, and the differential feed box 30 is connected to the servo motor 73, the upper end of the main shaft box 24 is connected with the main shaft AC frequency conversion motor 47 through the coupling body 46, the shift fork oil cylinder 41 on the opposite side of the motor is connected with the main shaft box 24, the lower end of the main shaft box 24 is connected with the motor frame 88, the motor frame 88 Connect the servo motor 86, the main shaft 23 passes through the square ram 21, one end of the main shaft 23 is connected on the milling shaft support rotating disk 17, and the other end is connected in the main shaft box 24, and the center of the main shaft is sleeved with the mandrel 22. the

The drilling and milling shaft 1 is fixed on the milling shaft frame 2 through the third bearing 15. The front end of the drilling and milling shaft 1 is provided with a 7:24 standard taper hole and a tool automatic broaching mechanism 16, and the rear end is provided with a tool release cylinder 8. The middle part is provided with the second gear 4 and the first gear 3, the second gear 4 meshes with the first gear 3 to drive the drilling and milling shaft 1 to rotate, and the drilling and milling shaft is provided with an internal cooling water outlet hole in the tool center (not shown in the figure), The milling shaft frame 2 is arranged in the inner hole of the milling shaft frame supporting turntable 17, the outer circle of the front end is radially positioned with a copper sleeve, and the rear end is positioned and connected with the first bearing 5. The milling shaft frame 2 is provided with an eccentric hole for installing the drill. The milling shaft 1 and the rear end of the milling shaft frame 2 are equipped with a first worm gear 6, and the first worm gear 6 meshes with the second worm 91 to drive the milling shaft frame 2 to rotate. The milling shaft frame 2 has a central inner hole, and the central inner hole is equipped with a The fourth bearing 18 is used to fix the first gear shaft 7 and the first gear 3. The two drilling and milling shafts 2 rotate to perform feed motion, and drive the mandrel 22 through the differential feed box 30 to realize the control of drive and motion speed Each of the two drilling and milling shafts 2 is equipped with a cutting tool to realize synchronous operation and processing. The milling shaft frame supports the turntable 17 and the main shaft 23 is positioned and connected, and the milling shaft frame supports the turntable 17. The milling shaft frame 2 is arranged symmetrically on the milling shaft frame. There are two second worms 91 on the 17, and the two second worms 91 are arranged symmetrically. The second worms 91 and the twenty-second bearings 93 are positioned and connected to each drive a milling bracket to rotate, and the milling bracket supports the middle part of the turntable 17 with the second Nine bearings 52 and eighth bearings 51 fix the first bevel gear shaft 48 and the second bevel gear shaft 49, and the first bevel gear shaft 48 and the second bevel gear shaft 49 are used to drive the second bevel gear 92; two second worms One end of 91 fixes the second bevel gear 92 respectively, and the second bevel gear 92 drives the second worm 91 to rotate. the

The square ram 21 is arranged in the square groove of the ram seat 20, the ram seat 20 and the ram cover 13 are fixed in position, and the square ram seat 20 is provided with an adjusting inclined iron 59 for adjusting the square ram 21 and the ram cover. The gap between the seat 20, the square ram 21 is provided with a main shaft 23, the main shaft 23 has an inner hole, the main shaft 23 is positioned and connected through the thirteenth bearing 58 of the front and rear main shafts, and the front end of the main shaft 23 is connected with the third gear with the twelfth bearing 57 19, used to transition the rotation of the second gear shaft 9 to the first gear shaft 7, the second gear shaft 9 is positioned and coupled to the front cover 10 of the square ram 21 with the second bearing 11, the mandrel 22, the first bevel gear 50 is positioned and connected on the inner hole of the main shaft 23 with the eleventh bearing 56. The square ram 21 has a ball screw seat 55 and a ball screw 54. The ball screw seat 55 is fixed on the square ram 21. The ball screw 54 The tenth bearing 53 is positioned and connected to the ram seat 20, the ball screw seat 55 is fixedly connected with a ball screw nut, a servo motor 81 is fixed on the box body 85, and a second synchronous pulley 84 is fixed on the servo motor 81. Connect the first synchronous pulley 82 and the second synchronous pulley 84 with the synchronous belt 83, the main shaft AC variable frequency motor 47 is positioned and connected with the main shaft box 24 through the connecting body 46, the fourth shaft 40, the third shaft 36, the second shaft 33 , the first shaft 28, the first shaft sleeve 31, and the first worm 89 are respectively positioned with the fifth bearing 27, the fourteenth bearing 60, the sixth bearing 32, the seventh bearing 37, the twenty-third bearing 45 and the headstock 24 Connection, the fifth gear 29, the sixth gear 34, the seventh gear 35, the eighth gear 38, the ninth gear 39, the fourth gear 25, the second worm gear 26 are respectively connected with the first shaft 28, the second shaft 33, the third The shaft 36 and the first shaft sleeve 31 are connected, the first shaft sleeve 31 is connected with the main shaft 23, and a high and low speed mechanism is arranged on the fourth shaft 40 output by the main shaft AC variable frequency motor 47, and the high-speed rotation is driven by the ninth gear 39 and the eleventh 43 The low-speed rotation is composed of the eighth gear 38 and the tenth gear 42. The high-low speed switching is completed by the shift fork cylinder 41 through the shift fork block 44 to drive the tenth gear 42 and the eleventh gear 43 to move on the fourth shaft 40, thereby The high and low speed rotation of the drilling and milling shaft 1 is realized. The high and low speed mechanism meets different processing speed requirements. A motor frame 88 is installed at the bottom end of the headstock 24 to fix the servo motor 86. The servo motor 86 is connected with the first worm with a coupling 87 89 connections, the first worm screw 89 is fixed on the headstock 24 with the twenty-first bearing 90, and the second shaft 33 is connected with the second gear shaft 9 with the connecting sleeve 12 and the connecting shaft 14. When the ball screw 54 rotates, it drives the square ram 22 to move horizontally. The torque of the main shaft inside the square ram 21 is input by the first bushing 31 at the tail, which can reduce the eccentric load of the front bearing of the main shaft; the structure of the square ram 21 can mainly realize The horizontal feed moment center coincides with the tool rotation center to improve cutting vibration and rollover distance. the

The differential body 64 is connected with the differential feed case 30 through the eighteenth bearing 75. Four shafts 65 and four groups of gears are installed on the differential body 64, which are respectively the sixteenth gear 70, the thirteenth gear 66, the The fourteenth gear 68, the twelfth gear 63, the fourth gear shaft 79 is connected with the differential feed case 30 with the twentieth bearing 78, the third gear shaft 76 is connected with the fourth gear shaft 79 with the nineteenth bearing 77, Shaft 61 supports gear 66, gear 68, gear 69, and gear 74 is fixed with servomotor 73, and servomotor 73 is fixed on the differential feed case 30 with box cover 72, and the 4th gear shaft 79 is connected with first shaft sleeve 31, The third gear shaft 76 is connected with the second axle sleeve 80, and the rotating speed of the third gear shaft 76 is the sum of the rotating speed of the milling shaft frame supporting the rotating disk 17 and the rotating speed of the servo motor 73 after gear reduction, and then passes through the second axle sleeve 80, The mandrel 22 is transmitted to the first bevel gear 50 , and the second bevel gear shaft 49 is driven to rotate by the milling shaft frame supporting turntable 17 to offset the rotating speed of the milling shaft frame supporting rotating disc 17 to the third gear shaft 76 . That is, the first bevel gear 50 is actually the rotational speed transmitted to the mandrel 22 by the servo motor 73 through gear reduction, so as to meet the structural requirements. the

The milling principle of the CNC dual-axis drilling and milling power head for valve body processing: the taper shank of the milling cutter cooperates with the inner taper hole of the drilling and milling shaft 1 to complete the main cutting movement of milling. The milling feed motion is completed by the rotation of the milling spindle support turntable 17, and can also be linked with the milling spindle 2 to synthesize the rotary feed, and the feed rate is controlled by the servo motor 73, 86 through the numerical control system. The size of the milling circle diameter is controlled by the milling spindle frame 2 as a rotary motion to control the position of the drilling and milling axis, and the specific position is controlled by the servo motor 73 through the numerical control system. The milling depth is completed by the horizontal movement of the square ram 21, and the feed depth is controlled by the servo motor 81 through the numerical control system. the

The principle of the valve body processing numerical control dual-axis drilling and milling power head: the taper shank of the drill bit cooperates with the inner taper hole of the drilling and milling shaft 1 to complete the main cutting movement of drilling. The drilling feed movement is completed by the horizontal movement of the square ram 21, and the feed rate is controlled by the servo motor 81 through the numerical control system. The drill bit position is completed by the rotation synthesis of the milling headstock 2 and the milling headstock support turntable 17, and the specific positions are controlled by the numerical control system by the servo motors 73 and 86 respectively. the

The description of main cutting motion and feed mechanism motion of CNC dual-axis drilling and milling power head for valve body processing is as follows: 

Drilling and milling axis 1 main cutting motion: Drilling and milling axis 1 rotary motion: the AC variable frequency motor 47 of the main shaft passes through the gears 42, 43, 35, 38, 39, 34, and passes through the second shaft 33, the connecting sleeve 12, the connecting shaft 14, the second shaft The second gear shaft 9, the third gear 19, the first gear shaft 7, the first gear 3 and the second gear 4 drive the drilling and milling shaft 1 to rotate. the

Milling shaft frame 2 rotary feed movement: the servo motor 73 enters the differential mechanism through the seventeenth gear 74 and the fifteenth 69 through the shaft 61, and the shaft 61 drives the gears 68 and 70 to rotate, and the shaft 65 drives the differential speed at this time The body 64 rotates, through the twelfth gear 63, the third gear shaft 76, the second sleeve 80, the mandrel 22, the first bevel gear 50, the second bevel gear shaft 49, the first bevel gear shaft 48, the second The bevel gear 92 drives two second worms 91 to rotate, and then each of the second worms 91 drives a first worm wheel 6 to rotate, so as to realize the rotary feed movement of the two milling shaft frames 2, and the rotation speed is controlled by the servo motor 73 driven by the driver . the

The milling feed motion is completed by the rotation of the milling spindle support turntable 17 or the milling spindle support 2, or it can be completed by the milling spindle support rotating disk 17 and the milling spindle support 2 linkage rotation. the

Drilling and milling axis 1 horizontal feeding mechanism: the ball screw 4 is driven to rotate by the servo motor 81 through the second synchronous pulley 84, the synchronous belt 83, and the first synchronous pulley 82, and then the square ram is driven by the ball screw seat 55 21 Horizontal movement, because the square ram 21, the milling shaft frame supporting the turntable 17, the milling shaft frame 2, and the drilling and milling shaft 1 are synchronously moving structures, thereby realizing the horizontal feed movement of the drilling and milling shaft 1, and the moving speed is driven by the driver. Servo motor 69 control. the

The milling shaft frame supports the rotary feed movement of the turntable 17: the second worm gear 26, the fourth gear 25, the fifth gear 29, the first bushing 31, and the main shaft 23 are driven by the servo motor 86 through the first worm 89 to complete the rotation, thereby realizing milling The axle frame supports the rotary feed movement of the turntable 17, and the rotational speed is controlled by the servo motor 86 driven by the driver. the

The above is only a preferred embodiment of the utility model embodiment, and is not intended to limit the utility model embodiment. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model embodiment, All should be included in the protection scope of the embodiments of the present utility model. the

Claims (5)

1. CNC dual-axis drilling and milling power head for valve body processing, including ram seat (20), square ram (21), spindle box (24), differential feed box (30), fork cylinder (41) , the square ram (21) is installed on the ram seat (20), the rear end of the square ram (21) is connected to the headstock (24), and the other end of the headstock (24) is connected to the differential feed box (30), the differential The speed feed box (30) is connected to the servo motor (73), and the upper end of the spindle box (24) is connected to the main shaft AC variable frequency motor (47) through the coupling body (46), and the shift fork oil cylinder (41) on the opposite side of the motor is connected to On the spindle box (24), the lower end of the spindle box (24) is connected with a motor frame (88), the motor frame (88) is connected with the servo motor (86), the main shaft (23) passes through the square ram (21), and one end is connected In the headstock (24), the mandrel (22) is sleeved in the center of the main shaft (23), and the fork block (44) is provided in the fork oil cylinder (41), and it is characterized in that: it also includes a milling shaft support to support the turntable (17), the front end of the square ram (21) is connected to the milling axle support turntable (17), the other end of the main shaft (23) is connected to the milling axle support turntable (17), and the milling axle support turntable (17) has There are two symmetrical inner holes, and a milling axle frame (2) is placed in each inner hole. The milling axle frame (2) has an eccentric hole, and the drilling and milling axle (1) is sleeved on the eccentric hole, and the drilling and milling axle (1) ) is provided with a tapered hole at the center, and the rear end of the tapered hole is provided with a tool automatic broaching mechanism (16). the 2. The numerical control dual-axis drilling and milling power head for valve body processing according to claim 1, characterized in that: there is a third bearing (15) in the milling shaft frame (2), and the drilling and milling shaft (1) passes through the third bearing (15) is fixed on the milling shaft frame (2), and the rear end of the automatic broaching mechanism (16) is provided with a loosening oil cylinder (8), and the middle part of the drilling and milling shaft (1) is provided with a second gear (4), and the second gear ( 4) It is socketed on the drilling and milling shaft (1), and the first gear shaft (7) is symmetrically arranged inside the milling shaft frame supporting the turntable (17), and the first gear shaft (7) is sleeved on the first gear shaft ( 3), the second gear (4) meshes with the first gear (3) to drive the drilling and milling shaft (1) to rotate, and the rear end of the first gear shaft (7) is sleeved with a fourth bearing (18) for fixing The first gear shaft (7) and the first gear (3), the drilling and milling shaft is provided with a cooling outlet hole in the tool center, the rear end of the milling shaft frame (2) is equipped with the first worm gear (6), the first worm gear (6 ) is connected to the second worm (91), the first worm gear (6) meshes with the second worm (91) to drive the milling shaft frame (2) to rotate, and each of the two drilling and milling shafts (2) is equipped with a tool to achieve synchronization For rotary processing, the axial ends of each second worm (91) are connected with twenty-second bearings (93), and each second worm (91) drives a milling bracket to rotate. the 3. The CNC dual-axis drilling and milling power head for valve body processing according to claim 1, characterized in that: the middle part of the milling shaft support turntable (17) is also fixed with the first bevel gear shaft (48), the second bevel gear shaft (49), the ninth bearing (52) is sleeved on the first bevel gear shaft (48), the eighth bearing (51) is sleeved on the second bevel gear shaft (49), and the second worm (91) Also socketed with the second bevel gear (92), the first bevel gear shaft (48) and the second bevel gear shaft (49) are used to drive the second bevel gear (92); the phase of each second worm (91) The adjacent ends are respectively fixed with the second bevel gear (92), and the second bevel gear (92) drives the second worm (91) to rotate. the 4. The numerical control dual-axis drilling and milling power head for valve body processing according to claim 1, characterized in that: the main shaft AC variable frequency motor (47) has an output fourth shaft (40), and the output fourth shaft (40) is The high and low speed mechanism is installed, the high speed rotation is composed of the ninth gear (39) and the eleventh gear (43), the low speed rotation is composed of the eighth gear (38) and the tenth gear (42), and the high and low speed switching is made by the fork cylinder (41) Drive the tenth gear (42) and the eleventh gear (43) to move on the fourth shaft (40) through the shift fork block (44). the 5. The CNC dual-axis drilling and milling power head for valve body processing according to claim 1, characterized in that: the taper hole in the center of the drilling and milling shaft (1) is a 7:24 standard taper hole. the

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