A barrel-type tool turret

Abstract

The application discloses a barrel type tool turret, which comprises a shell, characterized in that a motor is arranged in the shell, the output end of the motor is connected with a motor rotating shaft, a cam is arranged on the motor rotating shaft, the cam is in contact with a linkage shaft which is rotatably supported in the shell, a driving tooth is arranged on the linkage shaft, the driving tooth is in mesh with a driven tooth, the driven tooth is connected with a mandrel, a first sensing block is arranged at the tail end of the mandrel, a sensor support is arranged in the shell, a first sensing switch, a second sensing switch and a third sensing switch which are respectively matched with different sensing points on the first sensing block are arranged on the first sensor support, a second sensing block is connected with the free end of the motor rotating shaft, and a fourth sensing switch which is matched with the second sensing block is arranged in the shell.

Description

Technical Field

[0001] This invention relates to the field of machining, and in particular to a barrel-type tool turret. Background Technology

[0002] In many fields such as nuclear energy, aerospace, military industry, and energy, there is a need for long aluminum materials with large apertures and thin walls. At the same time, the requirements for the dimensional and shape accuracy of such aluminum materials are relatively high, while the surface roughness requirement is relatively low. Since there is currently no dedicated processing equipment for long aluminum materials with the above-mentioned process requirements, traditionally, extended boring bars are added to general-purpose turrets to process such products. Ordinary extended boring bars have cutting edges that are off-center, which causes the cutting force to concentrate on one side, resulting in vibration and deviation. Moreover, as the aperture gradually increases, the distance between the tool tip and the center of the boring bar also increases. At the same time, the excessively long cantilever of the boring bar results in insufficient cutting rigidity. Therefore, it is difficult to guarantee the dimensional accuracy, coaxiality, and surface finish of the machined parts.

[0003] Using a high-precision, high-rigidity, and high-vibration-resistant extended anti-vibration boring bar can avoid the above problems to some extent. However, such high-specification boring bars are expensive, and the number of tool positions cannot be expanded, resulting in low part processing efficiency and high costs.

[0004] Furthermore, for parts that require precision machining of internal holes, the chip removal process relies on the cutting wheel. If the chip removal effect is not good during the machining process, the surface finish of the machined part cannot be guaranteed, and secondary damage to the hole wall will occur. Whether it is an ordinary boring bar or a high-precision boring bar, achieving high-pressure, high-output water cooling chip removal function to ensure smooth chip removal will increase the cost significantly, thus putting great cost pressure on enterprises.

[0005] Therefore, a method or apparatus is needed to solve the above problems. Summary of the Invention

[0006] The present invention aims to solve the above-mentioned technical problems by proposing a barrel-type turret with a simple structure and ingenious design that can ensure high-precision boring of long-diameter aluminum materials.

[0007] The technical solution of this invention is: a barrel-type turret, comprising a housing 1, characterized in that: a motor 2 is disposed within the housing 1, the output end of the motor 2 is connected to a motor shaft 3, a cam 4 is disposed on the motor shaft 3, the cam 4 contacts a linkage shaft 5 rotatably supported within the housing 1, an active gear 6 is disposed on the linkage shaft 5, the active gear 6 meshes with a passive gear 7, the passive gear 7 is connected to a spindle 8, a first sensing block 9 is disposed at the tail end of the spindle 8, a first sensor bracket 10 is disposed within the housing 1, the first sensor bracket 10 is disposed with a first sensing switch 11, a second sensing switch 12, and a third sensing switch 13 respectively matched with different sensing points on the first sensing block 9, a second sensing block 14 is connected to the free end of the motor shaft 3, and a fourth sensing switch 15 matched with the second sensing block 14 is disposed within the housing 1.

[0008] A piston 16 is fixedly connected to the spindle 8. The piston 16 is located in a piston chamber 17 formed inside the housing 1. The piston chamber 17 is connected to a hydraulic system via a pipeline.

[0009] A cylindrical body 18 is fixedly connected to the housing 1. A spindle 8 is rotatably connected within the housing 1 and the cylindrical body 18. A connecting section 19 is provided at the end of the spindle 8, and a cutter head body 20 is sleeved on the connecting section 19. The cutter head body 20 is fixedly connected to the spindle 8 by a locking nut 21 threaded onto the connecting section 19. A rotating gear ring 22 is provided on the rear end face of the cutter head body 20, while a positioning gear ring 23 matching the rotating gear ring 22 is provided on the front end face of the cylindrical body 18. Three cutter connecting mechanisms 24 evenly distributed in the circumferential direction are provided on the end face of the cutter head body 20.

[0010] The cylinder 18 has interconnected water inlet channels and water inlet chambers. A water inlet sleeve 25 is movably connected inside the water inlet chamber. A spring 26 is provided at one end of the water inlet sleeve 25, and a sealing ring 27 is provided at the end face of the other end. A through hole connected to the water inlet channel is provided on the side wall of the water inlet sleeve 25. The outlet end of the water inlet sleeve 25 is matched with the cooling pipes 28 provided on the cutter head body 20. There are three independent cooling pipes 28, and each of the three cooling pipes 28 corresponds to one of the three sets of tool connection mechanisms 24.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] The barrel-type turret of this invention features a simple structure, ingenious design, and reasonable layout. Addressing the problems inherent in traditional methods of adding auxiliary boring bars during machining, it employs a unique structure. Using a motor as a power source, the motor's output is connected to a mandrel via multiple transmission pairs. The mandrel is housed within a cylindrical body fixed to the casing, and a cutter head is positioned at its front end. The cutter head and the cylindrical body are connected by a meshing / separating gear ring structure. The cutter head rotates under the drive of the mandrel. This structure provides sufficient cantilever rigidity, supported by the mandrel and the surrounding cylindrical body, preventing tool vibration and deviation during cutting, thus ensuring dimensional accuracy, coaxiality, and surface finish. Furthermore, cooling pipes are installed on the cutter head, cooling both the cutter head and the tool, and flushing away cutting chips generated during boring, again ensuring machining accuracy. Furthermore, this cannon-shaped turret has a simple manufacturing process and low production cost, so it can be said that it has many advantages and is particularly suitable for promotion and application in this field, with a very broad market prospect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention.

[0014] Figure 2 yes Figure 1 A magnified view of a portion of the middle shell.

[0015] Figure 3 yes Figure 1 A magnified view of a portion of the blade disc body.

[0016] Figure 4 yes Figure 3 A-direction view.

[0017] Figure 5 yes Figure 1 A magnified view of part B in the image. Detailed Implementation

[0018] Specific embodiments of the present invention will now be described in conjunction with the accompanying drawings. Figures 1 to 5The diagram shows a barrel-type turret, comprising a housing 1, a motor 2 housed within the housing 1, a motor shaft 3 connected to the output end of the motor 2, a cam 4 mounted on the motor shaft 3, the cam 4 contacting a linkage shaft 5 rotatably supported within the housing 1, a drive gear 6 on the linkage shaft 5 meshing with a driven gear 7 connected to a spindle 8, a first sensing block 9 at the tail end of the spindle 8, a first sensor bracket 10 housed within the housing 1, and a first sensor switch 11, a second sensor switch 12, and a third sensor switch 13, each matching a different sensing point on the first sensing block 9, mounted on the first sensor bracket 10. A second sensing block 14 is connected to the free end of the motor shaft 3, and a fourth sensor switch 15, matching the second sensing block 14, is housed within the housing 1.

[0019] A piston 16 is fixedly connected to the spindle 8. The piston 16 is located in a piston chamber 17 formed inside the housing 1. The piston chamber 17 is connected to a hydraulic system via a pipeline.

[0020] A cylindrical body 18 is fixedly connected to the housing 1. A spindle 8 is rotatably connected within the housing 1 and the cylindrical body 18. A connecting section 19 is provided at the end of the spindle 8, and a cutter head body 20 is sleeved on the connecting section 19. The cutter head body 20 is fixedly connected to the spindle 8 by a locking nut 21 threaded onto the connecting section 19. A rotating gear ring 22 is provided on the rear end face of the cutter head body 20, while a positioning gear ring 23 matching the rotating gear ring 22 is provided on the front end face of the cylindrical body 18. Three cutter connecting mechanisms 24 evenly distributed in the circumferential direction are provided on the end face of the cutter head body 20.

[0021] The cylinder 18 has interconnected water inlet channels and water inlet chambers. A water inlet sleeve 25 is movably connected inside the water inlet chamber. A spring 26 is provided at one end of the water inlet sleeve 25, and a sealing ring 27 is provided at the end face of the other end. A through hole connected to the water inlet channel is provided on the side wall of the water inlet sleeve 25. The outlet end of the water inlet sleeve 25 is matched with the cooling pipe 28 provided on the cutter head body 20. There are three cooling pipes 28, and these three cooling pipes 28 correspond one-to-one with three sets of tool connection mechanisms 24.

[0022] The working process of the barrel-type turret in this embodiment of the invention is as follows: When a tool needs to be installed on the tool disc body 20, the hydraulic system is first controlled by the control system to inject hydraulic oil into the piston chamber 17, driving the piston 16 to move, which in turn drives the spindle 8 to move along its own axial direction in the cylinder 18. At this time, the rotating gear ring 22 and the positioning gear ring 23 disengage, and the tool disc body 20 restores its circumferential degree of freedom. The robot arm drives the tool to the upper tool position and installs the tool on the first tool connecting mechanism 24 that is pre-stopped at the upper tool position. Then the robot arm moves away to take the next tool, and the control system controls the motor 2 to work. The motor 2 drives the motor shaft 3 to rotate. The motor shaft 3 drives the linkage shaft 5 to rotate through the cam 4. The linkage shaft 5 drives the spindle 8 to rotate through the gear transmission pair, which in turn drives the tool disc body 20 connected to the front end of the spindle 8 to rotate a certain angle, so that the second tool connecting mechanism 24 rotates to the upper tool position. The robot arm installs the second tool on the second tool connecting mechanism 24, and so on, to complete the connection of all tools with the tool disc body 20.

[0023] After the tool is installed, the hydraulic system is activated, driving the piston 16 to move in the opposite direction. The rotating gear ring 22 re-engages with the positioning gear ring 23 and meshes with it. Under the action of hydraulic pressure and the two gear rings, the cutter head body 20 is positioned in the axial and circumferential rotational directions, and the tool on it is also fixed relative to the cylinder 18.

[0024] With the cutting tool fixed, the workpiece moves relative to the cutting tool, thereby enabling the cutting tool to machine the workpiece;

[0025] During the machining process, the cooling water circulation system introduces cooling water into the inlet chamber through the inlet channel, specifically into the inlet sleeve 25 through the through hole, and then into the cooling pipe 28 opened on the cutter head body 20. This cools the tool and the cutter head body 20 and also flushes away the cutting chips generated during machining, preventing the cutting chips from affecting the machining accuracy. When the cutter head body 20 rotates, the inlet sleeve 25 disconnects from the currently connected cooling pipe 28, and when the cutter head body 20 rotates to the next position, it connects to the next cooling pipe 28. Under the action of the spring 26, the end face of the inlet sleeve 25 presses the sealing ring 27 against the side of the cutter head body 20, thereby achieving a sealing effect. At this time, the inlet sleeve 25 is connected to the current cooling pipe 28, thereby cooling the tool currently in the machining position and flushing away the cutting chips.

[0026] During the operation of this barrel-type turret, the three sensor switches 11 set on the first sensor bracket 10 will be triggered by different sensing points on the first sensing block 9 when the spindle 8 rotates, thereby determining which tool connection mechanism 24 is currently in the tool loading position.

[0027] When the rotating gear ring 22 disengages from the positioning gear ring 23, the spindle 8 moves toward the direction of the cutter head body 20. At this time, the position of the first sensing block 9 at the tail end of the spindle 8 relative to the housing 1 changes. The first sensing switch 11 is triggered by the sensing point on the first sensing block 9. After receiving the signal from the first sensing switch 11, the control system can determine that the rotating gear ring 22 and the positioning gear ring 23 are in a separated state. Only then will it control the motor 2 to work and drive the spindle 8 to rotate.

[0028] During the rotation of the spindle 8, the second inductive switch 12 and the third inductive switch 13 will detect different sensing points on the first sensing block 9 respectively. By combining the sensing states between them, the control system can determine which tool connection mechanism 24 is currently in the tool-on position. For example, if the three tool connection mechanisms 24 are labeled A, B, and C respectively, and the state when the inductive switch is triggered is marked as 1, and the state when it is not triggered is marked as 0, then: when the second inductive switch 12 is 1 and the third inductive switch 13 is 0, A is in the tool-on position; when the second inductive switch 12 is 0 and the third inductive switch 13 is 1, B is in the tool-on position; when both the second inductive switch 12 and the third inductive switch 13 are 1, C is in the tool-on position.

[0029] The above description only takes the example of having three tool connecting mechanisms 24 on the tool turret body 20. When the number of tool connecting mechanisms 24 is greater, the number of induction switches can be increased accordingly, and the current state of the tool turret body 20 can be detected in the manner described above.

[0030] To achieve the above working process, multiple sensing points at different positions will be set on the first sensing block 9 as needed to trigger multiple sensing switches respectively;

[0031] The fourth inductive switch 15 is used to detect the rotational position of the motor shaft 3. It is mainly used as a start signal for the cutter head body 20 to stop rotating and lock. The switch 15 senses the cutter head body 20 once every time the tool position is changed, and sends a signal to the control system. The control system will then control the locking mechanism that matches the cutter head body 20 to stop rotating, so as to ensure that the cutter head body 20 is in the working state of turret locking.

Claims

1. A barrel-type tool turret comprising a housing (1), characterized in that: A motor (2) is installed inside the housing (1). The output end of the motor (2) is connected to a motor shaft (3). A cam (4) is installed on the motor shaft (3). The cam (4) contacts a linkage shaft (5) that is rotatably supported inside the housing (1). An active tooth (6) is installed on the linkage shaft (5). The active tooth (6) meshes with a passive tooth (7). The passive tooth (7) is connected to a spindle (8). A first sensing block (9) is installed at the tail end of the spindle (8). A first sensor bracket (10) is installed inside the housing (1). A first sensor switch (11), a second sensor switch (12), and a third sensor switch (13) are installed on the first sensor bracket (10) and are respectively matched with different sensing points on the first sensing block (9). A second sensing block (14) is connected to the free end of the motor shaft (3). A fourth sensor switch (15) that matches the second sensing block (14) is installed inside the housing (1). A piston (16) is fixedly connected to the spindle (8). The piston (16) is located in a piston chamber (17) opened inside the housing (1). The piston chamber (17) is connected to the hydraulic system through a pipeline. A cylindrical body (18) is fixedly connected to the housing (1). The spindle (8) is rotatably connected inside the housing (1) and the cylindrical body (18). A connecting section (19) is provided at the end of the spindle (8). A cutter head body (20) is sleeved on the connecting section (19). The cutter head body (20) is fixedly connected to the spindle (8) by a locking nut (21) threaded onto the connecting section (19). A rotating gear ring (22) is provided on the rear end face of the cutter head body (20), while a positioning gear ring (23) matching the rotating gear ring (22) is provided on the front end face of the cylindrical body (18). Three cutter connecting mechanisms (24) are evenly distributed in the circumferential direction on the end face of the cutter head body (20). The cylinder (18) has interconnected water inlet channels and water inlet chambers. A water inlet sleeve (25) is movably connected in the water inlet chamber. A spring (26) is provided at one end of the water inlet sleeve (25), and a sealing ring (27) is provided at the end face of the other end. A through hole connected to the water inlet channel is provided on the side wall of the water inlet sleeve (25). The outlet end of the water inlet sleeve (25) is matched with the cooling pipe (28) opened on the cutter head body (20). There are three independent cooling pipes (28), and these three cooling pipes (28) correspond one-to-one with three sets of tool connection mechanisms (24).

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