High-speed precision spindle power combination head for same direction thread tapping

Abstract

The application relates to the technical field of numerical control machine tool machining equipment, in particular to a high-speed same-direction tapping precision spindle power combination head. The high-speed same-direction tapping precision spindle power combination head comprises a bottom plate, a fixed plate fixedly installed on the top of the bottom plate and a fixed shell installed on the outer side of the fixed plate. The tapping shaft and the pressure shaft are connected through a fixing block, the spring is compressed to store power when the Z-axis is pushed, the spring is reset to realize flexible tool withdrawal when the tool is withdrawn, the thread damage and tap fracture caused by hard synchronization are avoided, the tapping depth can be changed by adjusting the position of the limiting screw rod only when the product is replaced, reprogramming is not needed, the debugging time is greatly shortened, the servo motor can drive the tapping shaft, the ER16 tool bar, the power spindle and the ER11 tool bar through the gear assembly, drilling, chamfering and tapping multi-process integrated machining in the same station are realized, the clamping and tool changing frequency is reduced, and the precision and efficiency are improved.

Description

Technical Field

[0001] This invention relates to the field of CNC machine tool processing equipment technology, and more specifically, to a high-speed co-directional tapping precision spindle power combination head. Background Technology

[0002] In CNC machine tool machining, tapping (thread cutting) is a common metal cutting process. The tapping power head is usually directly connected to the Z-axis slide of the CNC machine tool, and its up and down feed motion relies entirely on the servo drive of the Z-axis. However, after tapping to the predetermined depth, the retraction process needs to ensure precise synchronization between the upward movement of the Z-axis and the reverse rotation of the tapping spindle motor. If there is a timing or speed deviation between the two, the tap is very likely to interfere when it retracts from the formed thread, resulting in scratches, misalignment, or even tooth breakage of the internal thread of the workpiece, and also significantly increasing the risk of tap breakage.

[0003] Furthermore, when dealing with products of different specifications, due to the varying depths of their threaded holes, operators must rewrite and adjust the Z-axis feed depth, speed curves, and spindle motor reversal parameters for each product. This adjustment process is not only tedious but also highly dependent on the operator's experience, requiring repeated trial cuts and verifications to obtain a stable combination of processing parameters. This consumes a significant amount of machine tool preparation time and severely restricts the improvement of the overall efficiency and flexible production capabilities of the production line.

[0004] In addition, traditional tapping power heads have a single function, only able to perform tapping operations. They cannot integrate multiple processes such as drilling, chamfering, and tapping in the same workstation, which increases the number of workpiece clamping and tool changes, affecting machining accuracy and efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a high-speed, co-directional tapping precision spindle power combination head to solve the problems mentioned in the background art, such as the need for precise synchronization during tool retraction in the traditional tapping power head and Z-axis hard connection method, which easily leads to thread damage and tap breakage, the need to reprogram and set Z-axis parameters during debugging of different products, which is cumbersome and time-consuming, and the single function of the traditional tapping power head, which cannot integrate multi-process processing.

[0006] To achieve the above objectives, the present invention aims to provide a high-speed, co-directional tapping precision spindle power combination head, comprising: Base plate; A fixing plate is fixedly installed on the top of the base plate; The outer casing is fixed and installed on the outside of the mounting plate; Gear assembly, housed inside a fixed housing; A servo motor is mounted on the side of the fixed plate away from the fixed housing, and its output shaft extends into the interior of the fixed housing and is connected to the gear assembly for transmission. The tapping spindle is connected to the gear assembly for transmission and can move axially relative to the gear assembly. The pressure shaft is axially slidably disposed inside the fixed housing; A fixing block is connected between the pressure shaft and the tapping shaft, so that when the tapping shaft moves axially, it drives the pressure shaft to move synchronously. A spring, fitted onto the outside of the pressure shaft, is used to provide a restoring force to the pressure shaft; The limiting ring is fixedly installed on the tapping spindle; The travel limit component is located on one side of the limit ring and is used to limit the axial travel of the tapping shaft.

[0007] As a further improvement to this technical solution, an oil injection device block is fixedly installed on the side of the fixed housing away from the fixed plate, and an oil injection head is installed at equal intervals on the outer side of the oil injection device block. An oil pipe connector is installed on the top of the fixed housing, and the oil pipe connector is connected to the oil injection head through an oil pipe.

[0008] As a further improvement to this technical solution, a bushing is fixedly installed inside the fixed housing by screws. One end of the pressure shaft passes through the bushing and is axially slidably connected to the bushing. The other end of the pressure shaft passes through the fixed plate and extends to the outside of the fixed plate. A retaining ring is fixedly installed on the outside of the pressure shaft. The spring is sleeved on the outside of the pressure shaft and presses against the bushing and the retaining ring. The spring passes through the fixed plate and does not contact the fixed plate.

[0009] As a further improvement to this technical solution, two intermediate support seats are fixedly installed on the outer side of the fixed plate, and a rear support seat is fixedly connected between the ends of the two intermediate support seats away from the fixed plate. The two intermediate support seats and the rear support seat form a U-shaped structure, and one end of the pressure shaft passes through the rear support seat.

[0010] As a further improvement to this technical solution, one end of the tapping shaft passes through the fixed plate and the rear support seat, and the tapping shaft is rotatably connected to the base plate and the rear support seat through bearings, and the tapping shaft can move axially relative to the bearings.

[0011] As a further improvement to this technical solution, one end of the pressure shaft passes through the fixing block and is fixedly connected to the fixing block, and one end of the tapping shaft passes through the fixing block and is rotatably connected to the fixing block through a bearing.

[0012] As a further improvement to this technical solution, the stroke limiting component includes a concave plate, a fixing nut fixedly installed in the middle of the concave plate, and a limiting screw threaded inside the fixing nut. The end of the limiting screw extends between the two intermediate support seats and cooperates with the limiting ring to abut against the limiting ring when the tapping shaft moves axially to a predetermined position to achieve stroke limiting.

[0013] As a further improvement to this technical solution, a protective plate is also included. The protective plate is installed on the side of the fixed plate away from the fixed outer shell. The intermediate support seat and the protective plate are respectively provided with notches. The concave plate is disposed inside the notch, and the two ends of the concave plate extend to the outside of the protective plate.

[0014] As a further improvement to this technical solution, the outer side of the protective plate and both sides of the notch are threaded with fastening bolts. The ends of the fastening bolts extend into the interior of the intermediate support and are threadedly connected to the intermediate support. The two ends of the concave plate are provided with waist-shaped holes, and the fastening bolts pass through the waist-shaped holes to adjust the position of the concave plate and the limiting screw.

[0015] As a further improvement to this technical solution, the gear assembly is also connected to an ER16 tool holder, two power spindles and an ER11 tool holder, and the ER16 tool holder, the power spindles and the ER11 tool holder can all move axially relative to the gear assembly.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this high-speed co-directional tapping precision spindle power combination head, the tapping shaft is connected to the gear assembly and can move axially relative to the gear assembly. The pressure shaft is axially slidably set inside the fixed housing, and the tapping shaft and the pressure shaft are connected by a fixed block. When the tapping shaft is pushed axially by the Z-axis, the fixed block drives the pressure shaft to move synchronously and compress the spring. The spring provides the restoring force. When the tap retracts, it relies on the spring to return and cooperates with the spindle to achieve flexible tap retraction. There is no need for precise synchronization between the Z-axis and the spindle motor, which effectively avoids the problems of thread damage, tooth corruption and tap breakage caused by synchronization deviation in the traditional hard connection method.

[0017] 2. This high-speed, co-directional tapping precision spindle power combination head achieves precise tapping depth control by fixing a limiting ring to the tapping spindle and setting a travel limiting component on one side. When the limiting ring moves with the tapping spindle to a predetermined position, it abuts against the travel limiting component. When changing to different products and needing to adjust the tapping depth, only the position of the travel limiting component needs to be adjusted. There is no need to reprogram and debug the Z-axis travel distance and spindle motor parameters, which significantly shortens product changeover time, lowers the technical threshold for operators, and effectively improves the flexible production capacity of the production line.

[0018] 3. This high-speed co-directional tapping precision spindle power combination head is connected to the gear assembly via a servo motor. In addition to the tapping spindle, the gear assembly can also drive the ER16 tool holder, the power spindle, and the ER11 tool holder. It can realize the integrated processing of multiple processes such as drilling, chamfering, and tapping in the same station, reducing the number of workpiece clamping times and tool change time, and improving processing efficiency and positional accuracy. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of the fixed outer casing after disassembly.

[0021] Figure 3 This is a schematic diagram of the structure of the protective plate after disassembly.

[0022] Figure 4 This is a schematic diagram of the structure of the fixed outer shell, protective plate and intermediate support base after disassembly.

[0023] Figure 5 This is a schematic diagram of the pressure shaft, tapping shaft, and stroke limiting assembly of the present invention.

[0024] In the diagram: 1. Base plate; 2. Fixed outer shell; 3. Fixing plate; 4. Protective plate; 5. Oil injection device block; 6. Oil injector head; 7. Oil pipe connector; 8. Servo motor; 9. Gear assembly; 10. ER16 tool holder; 11. Power spindle; 12. Tapping spindle; 13. ER11 tool holder; 14. Bushing; 15. Pressure shaft; 16. Retaining ring; 17. Spring; 18. Limiting ring; 19. Fixing block; 20. Intermediate support seat; 21. Rear support seat; 22. Notch; 23. Fastening bolt; 24. Concave plate; 25. Waist-shaped hole; 26. Fixing nut; 27. Limiting screw. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please refer to Figures 1 to 5 This invention provides a high-speed, co-directional tapping precision spindle power combination head for CNC machine tools. It aims to break away from the traditional hard-connection feed method, making debugging and modification more convenient, while simultaneously enabling multi-process integrated machining. Specifically, the power combination head includes a base plate 1, a fixing plate 3, a fixing housing 2, a gear assembly 9, a servo motor 8, a tapping spindle 12, a pressure spindle 15, a fixing block 19, a spring 17, a limit ring 18, and a stroke limit assembly.

[0027] The base plate 1 serves as the mounting foundation for the entire power assembly head and has a horizontal plate-like structure. The fixing plate 3 is vertically fixed to the top of the base plate 1, and the fixing housing 2 is fixed to the outer side of the fixing plate 3 (i.e., the side facing the processing area). The servo motor 8 is mounted on the side of the fixing plate 3 away from the fixing housing 2 (i.e., the rear side), and its output shaft extends through the fixing plate 3 into the interior of the fixing housing 2, where it is connected to a gear assembly 9 located inside the fixing housing 2. The gear assembly 9 consists of multiple gears and acts as a power distribution unit, transmitting the rotational power of the servo motor 8 to multiple working shafts.

[0028] Reference Figure 1 and Figure 3 An oil spraying device block 5 is fixedly installed on the side of the fixed housing 2 away from the fixed plate 3 (i.e., the front face). Multiple oil spray nozzles 6 are equidistantly installed on the outer side of the oil spraying device block 5, with the outlets of the oil spray nozzles 6 facing the machining area. An oil pipe connector 7 is installed on the top of the fixed housing 2, and the oil pipe connector 7 is connected to the oil spray nozzles 6 through an internal oil passage. External cutting fluid enters the oil spraying device block 5 through the oil pipe connector 7 and is sprayed out from the oil spray nozzles 6 to cool and lubricate the machining area.

[0029] Reference Figure 2 , Figure 4 and Figure 5 The gear assembly 9 is connected to a tapping shaft 12. The mating relationship between the tapping shaft 12 and the gear assembly 9 allows the tapping shaft 12 to both rotate with the gear assembly 9 and slide axially relative to the gear assembly 9. Specifically, the gear assembly 9 is provided with a guide structure that mates with the tapping shaft 12, and the tapping shaft 12 is provided with a corresponding guide block (not shown in the figure). The two work together to achieve torque transmission while allowing relative axial movement.

[0030] Two intermediate support seats 20 are fixedly installed on the outer side (i.e., the rear side) of the fixing plate 3. The two intermediate support seats 20 are arranged in parallel and spaced apart, and a rear support seat 21 is fixedly connected between their rear ends. The two intermediate support seats 20 and the rear support seat 21 form a U-shaped structure, which provides support space for the rear ends of the tapping shaft 12 and the pressure shaft 15.

[0031] One end of the tapping shaft 12 passes through the fixed housing 2 and extends from its front end for mounting tapping tools such as taps; the other end of the tapping shaft 12 passes through the fixed plate 3 and the rear support 21 in sequence, extending to the rear area of ​​the power assembly head.

[0032] Reference Figure 2 , Figure 3 , Figure 4 and Figure 5The pressure shaft 15 is axially slidably disposed inside the fixed housing 2, and its front end is slidably engaged with the bushing 14 inside the fixed housing 2. Specifically, the bushing 14 is fixedly installed inside the fixed housing 2 by screws, and the front end of the pressure shaft 15 passes through the bushing 14 and is axially slidably connected with the bushing 14. The bushing 14 provides guidance and support for the pressure shaft 15. The rear end of the pressure shaft 15 passes through the fixed plate 3 and the rear support seat 21 in sequence, extending to the rear of the rear support seat 21.

[0033] Reference Figure 4 and Figure 5 Between the fixed plate 3 and the rear support 21, the tapping shaft 12 and the pressure shaft 15 are connected by a fixed block 19. Specifically, the pressure shaft 15 passes through the fixed block 19 and is fixedly connected to the fixed block 19 (e.g., by interference fit or fastener locking); the tapping shaft 12 passes through the fixed block 19 and is rotatably connected to the fixed block 19 by a bearing, so that the tapping shaft 12 can rotate freely relative to the fixed block 19, but the axial movement of the tapping shaft 12 drives the pressure shaft 15 to move synchronously through the fixed block 19.

[0034] Reference Figure 4 and Figure 5 A retaining ring 16 is fixedly installed on the outer side of the pressure shaft 15, located between the bushing 14 and the fixing plate 3. A spring 17 is sleeved on the outer side of the pressure shaft 15 and presses against the rear end face of the bushing 14 and the front end face of the retaining ring 16. The spring 17 passes through the fixing plate 3 but does not contact the fixing plate 3 (i.e., the fixing plate 3 has a through hole for the spring 17 to pass through, and the spring 17 can freely extend and retract within the through hole). The spring 17 is always in a compressed state, applying a rearward thrust to the retaining ring 16, and then applying a rearward restoring force to the tapping shaft 12 through the fixing block 19.

[0035] Reference Figure 4 and Figure 5 A limiting ring 18 is fixedly installed on the outer side of the tapping spindle 12, between the fixing plate 3 and the rear support 21, by screws. The limiting ring 18 moves axially with the tapping spindle 12. A stroke limiting assembly is provided on one side of the limiting ring 18 to limit the axial movement stroke of the tapping spindle 12.

[0036] Specifically, the travel limiting assembly includes a concave plate 24, a fixing nut 26, and a limiting screw 27. The intermediate support 20 and the protective plate 4 have corresponding notches 22. The concave plate 24 is disposed inside the notch 22, and both ends of the concave plate 24 extend to the outside of the protective plate 4. Fastening bolts 23 are threadedly connected to the outside of the protective plate 4 on both sides of the notch 22. The ends of the fastening bolts 23 extend into the intermediate support 20 and are threadedly connected to it. The concave plate 24 has oblong holes 25 at both ends, through which the fastening bolts 23 pass. By loosening the fastening bolts 23, the position of the concave plate 24 can be adjusted along the direction of the oblong holes 25, thereby adjusting the position of the limiting screw 27. The fixing nut 26 is fixedly installed in the middle of the concave plate 24, and the limiting screw 27 is threadedly connected to the inside of the fixing nut 26. The end of the limiting screw 27 extends between the two intermediate supports 20 and cooperates with the limiting ring 18. The rotating limit screw 27 can be finely adjusted to extend its length between the two intermediate support seats 20.

[0037] Reference Figure 1 and Figure 2 The protective plate 4 is installed on the side of the fixed plate 3 away from the fixed housing 2 to protect the moving parts in the rear area and prevent cutting fluid and chips from splashing in.

[0038] Reference Figure 1 , Figure 2 and Figure 4 The gear assembly 9 also includes a drive connection to an ER16 tool holder 10, two power spindles 11, and an ER11 tool holder 13. The ER16 tool holder 10 is used to mount larger diameter milling cutters or drills, the two power spindles 11 are used to mount other machining tools, and the ER11 tool holder 13 is used to mount smaller diameter tools. The ER16 tool holder 10, power spindles 11, and ER11 tool holder 13 can all move axially relative to the gear assembly 9, and their structure is similar to that of the tapping spindle 12, which will not be described further here. These tool holders and spindles rotate in the same direction as the tapping spindle 12, enabling integrated machining of multiple processes such as drilling, chamfering, milling, and tapping at the same station.

[0039] Working principle: First, the power assembly head is fixedly mounted on the Z-axis slide of the CNC machine tool via the base plate 1. The servo motor 8 is started, and drives the tapping spindle 12, ER16 tool holder 10, power spindle 11 and ER11 tool holder 13 to rotate synchronously through the gear assembly 9.

[0040] In the initial state, the tapping shaft 12 is in a retracted position (i.e., non-working position) under the elastic force of the spring 17, and the limiting ring 18 is away from the limiting screw 27.

[0041] During operation, the Z-axis of the CNC machine tool feeds forward (towards the workpiece), pushing the tapping spindle 12 forward. As the tapping spindle 12 moves forward, it drives the pressure spindle 15 forward synchronously via the fixed block 19. The retaining ring 16 on the pressure spindle 15 compresses the spring 17 forward, storing energy in the spring 17. The tap at the front end of the tapping spindle 12 contacts the workpiece and begins the tapping process.

[0042] During tapping, the Z-axis continuously feeds forward, and the tapping shaft 12 continuously extends forward. When the limiting ring 18 on the tapping shaft 12 moves forward with the tapping shaft 12 and contacts the end of the limiting screw 27, the limiting ring 18 is blocked by the limiting screw 27, and the tapping shaft 12 can no longer move forward, indicating that the tapping has reached the predetermined depth. At this time, the stroke limit component sends a signal to the control system (which can be achieved through a sensor linked to the limiting screw 27), and the control system controls the Z-axis to stop feeding.

[0043] After tapping is completed, the retraction phase begins. The control system controls the Z-axis to return to its original position (retract), but due to the engagement of the tap with the machined threads on the workpiece, the tapping shaft 12 experiences forward resistance and cannot immediately retract with the Z-axis. At this time, because the spring 17 is compressed and stores energy, it continuously applies a backward thrust to the retaining ring 16, while the servo motor 8 drives the tapping shaft 12 to reverse. Under the combined action of the thrust of the spring 17 and the reverse rotation of the tapping shaft 12, the tap gradually withdraws from the threaded hole, achieving flexible retraction. During this process, the retraction speed of the tapping shaft 12 is determined by the thrust of the spring 17 and the engagement between the tap and the thread, without needing precise synchronization with the retraction speed of the Z-axis, effectively avoiding thread damage, misalignment, or tap breakage caused by synchronization deviation.

[0044] After the tap is completely withdrawn from the workpiece, the tapping spindle 12 is fully reset to its initial position under the action of the spring 17, and the limiting ring 18 returns to its initial state away from the limiting screw 27, ready for the next tapping cycle.

[0045] When it is necessary to change to different products or adjust the tapping depth, the operator only needs to loosen the fastening bolt 23, move the concave plate 24 along the direction of the oblong hole 25, or rotate the limit screw 27 to adjust its extension length, thereby changing the movement limit position of the limit ring 18 and thus changing the tapping depth. The entire process does not require reprogramming or adjusting the Z-axis movement distance and the parameters of the servo motor 8, making the operation simple and quick.

[0046] Furthermore, during or before / after tapping operations, the tools on the ER16 tool holder 10, the power spindle 11, and the ER11 tool holder 13 can simultaneously or sequentially perform drilling, chamfering, milling, and other machining operations on the workpiece, achieving integrated machining of multiple processes at the same workstation. The oil spray head 6 continuously sprays cutting fluid into the machining area during the machining process, cooling and lubricating the tools and workpiece, improving machining quality and tool life.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-speed, co-directional tapping precision spindle power combination head, characterized in that, include: Base plate (1); The fixing plate (3) is fixedly installed on the top of the base plate (1); The outer casing (2) is fixed and installed on the outside of the fixing plate (3); Gear assembly (9) is disposed inside the fixed housing (2); A servo motor (8) is mounted on the side of the fixed plate (3) away from the fixed housing (2) and its output shaft extends into the interior of the fixed housing (2) and is connected to the gear assembly (9) for transmission. The tapping shaft (12) is connected to the gear assembly (9) and can move axially relative to the gear assembly (9); The pressure shaft (15) is axially slidably disposed inside the fixed housing (2); A fixing block (19) is connected between the pressure shaft (15) and the tapping shaft (12) so that when the tapping shaft (12) moves axially, it drives the pressure shaft (15) to move synchronously. Spring (17) is sleeved on the outside of pressure shaft (15) to provide restoring force to pressure shaft (15); The limiting ring (18) is fixedly installed on the tapping shaft (12); A travel limit component is provided on one side of the limit ring (18) to limit the axial travel of the tapping shaft (12).

2. The high-speed co-directional tapping precision spindle power combination head according to claim 1, characterized in that, The fixed housing (2) is fixedly installed with an oil injection device block (5) on the side away from the fixed plate (3). An oil injection head (6) is installed at equal intervals on the outer side of the oil injection device block (5). An oil pipe connector (7) is installed on the top of the fixed housing (2). The oil pipe connector (7) is connected to the oil injection head (6) through an oil pipe.

3. The high-speed co-directional tapping precision spindle power combination head according to claim 1, characterized in that, The fixed housing (2) is fitted with a bushing (14) by screws. One end of the pressure shaft (15) is inserted into the bushing (14) and is axially slidably connected to the bushing (14). The other end of the pressure shaft (15) passes through the fixed plate (3) and extends to the outside of the fixed plate (3). A retaining ring (16) is fixedly installed on the outside of the pressure shaft (15). The spring (17) is sleeved on the outside of the pressure shaft (15) and presses against the bushing (14) and the retaining ring (16). The spring (17) passes through the fixed plate (3) and does not contact the fixed plate (3).

4. The high-speed co-directional tapping precision spindle power combination head according to claim 1, characterized in that, Two intermediate support seats (20) are fixedly installed on the outside of the fixed plate (3). A rear support seat (21) is fixedly connected between the ends of the two intermediate support seats (20) away from the fixed plate (3). The two intermediate support seats (20) and the rear support seat (21) form a U-shaped structure. One end of the pressure shaft (15) passes through the rear support seat (21).

5. The high-speed co-directional tapping precision spindle power combination head according to claim 4, characterized in that, One end of the tapping shaft (12) passes through the fixing plate (3) and the rear support seat (21), and the tapping shaft (12) is rotatably connected to the base plate (1) and the rear support seat (21) through bearings. The tapping shaft (12) can move axially relative to the bearing.

6. The high-speed co-directional tapping precision spindle power combination head according to claim 1, characterized in that, One end of the pressure shaft (15) passes through the fixing block (19) and is fixedly connected to the fixing block (19). One end of the tapping shaft (12) passes through the fixing block (19) and is rotatably connected to the fixing block (19) through a bearing.

7. The high-speed co-directional tapping precision spindle power combination head according to claim 1, characterized in that, The stroke limiting assembly includes a concave plate (24), a fixing nut (26) fixedly installed in the middle of the concave plate (24), and a limiting screw (27) threaded inside the fixing nut (26). The end of the limiting screw (27) extends between the two intermediate support seats (20) and cooperates with the limiting ring (18) to abut against the limiting ring (18) when the tapping shaft (12) moves axially to a predetermined position to achieve stroke limiting.

8. The high-speed co-directional tapping precision spindle power combination head according to claim 7, characterized in that, It also includes a protective plate (4), which is installed on the side of the fixed plate (3) away from the fixed shell (2). The intermediate support (20) and the protective plate (4) are respectively provided with notches (22). The concave plate (24) is disposed inside the notch (22), and the two ends of the concave plate (24) extend to the outside of the protective plate (4).

9. The high-speed co-directional tapping precision spindle power combination head according to claim 8, characterized in that, The outer side of the protective plate (4) and both sides of the notch (22) are threaded with fastening bolts (23). The ends of the fastening bolts (23) extend into the interior of the intermediate support (20) and are threadedly connected to the intermediate support (20). The two ends of the concave plate (24) are provided with waist-shaped holes (25). The fastening bolts (23) pass through the waist-shaped holes (25) to adjust the position of the concave plate (24) and the limiting screw (27).

10. The high-speed co-directional tapping precision spindle power combination head according to claim 1, characterized in that, The gear assembly (9) is also connected to an ER16 tool holder (10), two power spindles (11) and an ER11 tool holder (13), and the ER16 tool holder (10), the power spindles (11) and the ER11 tool holder (13) can all move axially relative to the gear assembly (9).

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