Precise thread milling equipment

Abstract

The invention relates to the technical field of milling equipment, in particular to precise thread milling equipment which comprises a longitudinal axis mechanism and a transverse axis mechanism which are used for driving a lifting mechanism to move in an XY-axis coordinate system; the lifting mechanism is used for driving the connecting table to lift; the milling cutter comprises a face milling cutter and a key groove milling cutter which are fixedly and rotatably arranged in the connecting table, and the key groove milling cutter is arranged in the face milling cutter in a penetrating manner; the driving motor drives the surface milling cutter and the groove milling cutter to synchronously and concentrically rotate through a coupling part during rotation; the pressing switching mechanism is fixed to the connecting table and arranged above the face milling cutter, the lifting mechanism is used for driving the connecting table to move upwards to start the pressing switching mechanism, the end of the key groove milling cutter extends out of the end of the face milling cutter or enters the end of the face milling cutter, the key groove milling cutter and the face milling cutter rotate concentrically, when switching is completed, re-calibration is not needed, and the machining efficiency is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of milling equipment, in particular to a precision thread milling equipment. Background Art

[0002] Roller screw precision milling is a high-precision milling process for machining roller screws. It is mainly used to cooperate with the driven milling cutter on the screw or roller surface to move the outer wall of the product and mill the outer surface of the product. The types of milling tools are generally divided into face milling cutters and keyway milling cutters.

[0003] The teeth of the face milling cutter are distributed on the end face of the milling cutter and are mainly used for machining planes. It has a large cutting edge width and diameter, can perform cutting with large feed rates, and has high machining efficiency.

[0004] The keyway milling cutter has cutting edges on both the cylindrical surface and the end face. The cutting edge on the cylindrical surface is the main cutting edge, and the end face cutting edge plays an auxiliary cutting role. It can be used to process grooves, contours and steps of various shapes.

[0005] Because face milling cutters and keyway milling cutters have different functions, the milling cutter needs to be replaced when generating some products. For example, in the process of generating motor end plates, face milling cutters can be used to process the upper and lower planes of the end plates to achieve the required flatness and surface roughness requirements, providing a good foundation for subsequent assembly and use. If there are slot structures such as heat dissipation slots and lead slots on the motor end plates, the face milling cutter needs to be replaced with the keyway milling cutter for milling. By controlling the tool path and cutting parameters, slots of different shapes and sizes can be processed.

[0006] However, the existing technology still has the following problems: the milling cutter needs to be replaced continuously during the generation process; after the milling cutter is replaced, the accuracy needs to be calibrated manually or with intelligent equipment, which will reduce the processing efficiency; for this reason, the present invention provides a precision thread milling device. Summary of the Invention

[0007] The purpose of the present invention is to solve the problem that the functionality of milling equipment is not high.

[0008] In order to achieve the above-mentioned object, the present invention adopts the following technical solution: a precision thread milling device, comprising a device body, and further comprising:

[0009] The longitudinal axis mechanism and the transverse axis mechanism are used to drive the lifting mechanism to move in the XY axis coordinate system, wherein the longitudinal axis mechanism and the transverse axis mechanism are arranged perpendicular to each other, and the lifting mechanism is located on the longitudinal axis mechanism, wherein the XY axis coordinate system is established by the longitudinal axis mechanism and the transverse axis mechanism, and the connection point between the longitudinal axis mechanism and the transverse axis mechanism is the coordinate origin;

[0010] Lifting mechanism, used to drive the connection platform to rise and fall;

[0011] The milling cutter comprises a face milling cutter and a keyway milling cutter which are fixed and rotated in the connecting table, and the keyway milling cutter is arranged inside the face milling cutter;

[0012] The driving motor drives the face milling cutter and the slot milling cutter to rotate synchronously and concentrically through the coupling;

[0013] The press-switch mechanism is fixed to the connecting table and is arranged above the face milling cutter. The lifting mechanism is used to drive the connecting table to move up and start the press-switch mechanism, so that the end of the keyway milling cutter extends out of the end of the face milling cutter or enters the end of the face milling cutter. When the press-switch mechanism is started, the lifting mechanism drives the connecting table to reset.

[0014] Preferably, the press switching mechanism includes:

[0015] A fixing frame, fixed on the surface of the connecting platform;

[0016] a guide sleeve, fixed to the fixing frame;

[0017] A push rod, the push rod being slidably connected in the guide sleeve;

[0018] A linear rotating cam, set at the bottom of the push rod;

[0019] A transmission rod is rotatably connected to the bottom of the linear rotating cam, and a bottom end of the transmission rod rotates and extends into the face milling cutter;

[0020] The rebound mechanism is arranged in the face milling cutter. The top end of the keyway milling cutter passes through the rebound mechanism and is fixed to the bottom end of the transmission rod. The face milling cutter drives the keyway milling cutter to rotate synchronously through the transmission rod.

[0021] Preferably, a driving groove is opened on the surface of the transmission rod along its length direction, and a driving bar adapted to the driving groove is fixed on the inner wall of the face milling cutter.

[0022] Preferably, when the push rod is pressed down, the push rod drives the linear rotating cam in cooperation with the rebound mechanism to enter the deep recess or shallow recess opened in sequence on the surface of the guide sleeve. When the linear rotating cam enters the deep recess, the keyway milling cutter extends to the outside of the face milling cutter. When the linear rotating cam enters the shallow recess, the keyway milling cutter is located inside the face milling cutter.

[0023] Preferably, the top end surface of the linear rotating cam is provided with an inclined surface facing one side, and the push rod and the bottom end surface of the guide sleeve are both provided with abutment surfaces adapted to the inclined surface, and the abutment surfaces adapted to the inclined surface are used to guide the linear rotating cam into a shallow recess or a deep recess.

[0024] Preferably, the rebound mechanism includes a fixing ring and a spring. The fixing ring is horizontally fixed in the face milling cutter. The spring is arranged between the fixing ring and the bottom end of the transmission rod. The top end of the keyway milling cutter passes through the fixing ring and the spring in sequence. The keyway milling cutter is detachably fixed to the bottom end of the transmission rod.

[0025] Preferably, the transverse axis mechanism includes a second motor, a second ball screw, and a second screw sleeve. The second motor is fixed on one side of the device body, the second ball screw is fixed at the rotating end of the second motor, the other end of the second ball screw is rotatably connected to the device body, and the second screw sleeve is rotatably connected to the surface of the second ball screw; the second motor drives the second ball screw to rotate, thereby driving the second screw sleeve to move on the surface of the second ball screw.

[0026] Preferably, the longitudinal axis mechanism includes a first motor, a crescent-shaped telescopic rod, a guide bar, a transmission assembly, a ball screw, and a screw sleeve. The ball screw is rotatably connected to one side of the screw sleeve, and the other end of the ball screw is rotatably connected to the device body. The first motor is fixed to one side of the device body, the crescent-shaped telescopic rod is fixed to the rotating end of the first motor, and the other end of the crescent-shaped telescopic rod is fixedly engaged with a transmission assembly. The transmission assembly is used to drive the ball screw to rotate. The surface of the ball screw is rotatably provided with a screw sleeve; when the screw sleeve moves, the crescent-shaped telescopic rod is driven to extend and retract synchronously through the transmission assembly.

[0027] Preferably, the transmission assembly includes a connecting frame, which is fixed on one side of the screw sleeve 2, a fixed column is fixed on one side of the top of the connecting frame, the end of the fixed column is rotatably connected to the second bevel gear, the telescopic end of the crescent-shaped telescopic rod is fixed with a first bevel gear, the first bevel gear is meshed with the second bevel gear, and one end of the second bevel gear is transmitted to the ball screw 1 through a transmission belt.

[0028] Preferably, one end of the connecting platform is sleeved on the surface of the lifting mechanism, and the lifting mechanism is fixed to the screw sleeve; the driving motor is fixed on the top surface of the connecting platform, and a coupling is provided on the top of the face milling cutter, and the face milling cutter is linked to the rotating end of the driving motor through the coupling.

[0029] Compared with the prior art, the advantages and beneficial effects of the present invention are:

[0030] The milling cutter is moved to the processing position through the longitudinal and transverse axis mechanisms, the vertical block is started in the forward direction, the vertical block drives the connecting table to move up, the push rod contacts and presses down in the equipment body, and the self-locking motor starts in the reverse direction to drive the milling cutter to reset and complete the self-locking. The keyway milling cutter extends to the outside of the face milling cutter. When only the face milling cutter is needed, the same operation can be performed. The keyway milling cutter is reset to the inside of the face milling cutter. The above operation can be completed without stopping the drive motor, avoiding frequent starting and stopping of the drive motor when replacing the milling cutter. First, it can increase the service life of the drive motor. Second, when the milling cutter is switched, it has a stable speed (compared with the existing technology, it saves the time of waiting for the speed to stabilize), and the processing efficiency is higher; the keyway milling cutter and the face milling cutter rotate concentrically, and when the switch is completed, there is no need to calibrate again, which further improves the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0032] Figure 1 This is a schematic diagram of the three-dimensional structure of a precision thread milling device of the present invention;

[0033] Figure 2 It is a schematic structural diagram of the longitudinal axis mechanism and the transverse axis mechanism of the present invention;

[0034] Figure 3 It is a schematic diagram of the longitudinal axis mechanism structure of the present invention;

[0035] Figure 4 It is a schematic diagram of the coupling structure of the present invention;

[0036] Figure 5 This is a schematic diagram of the connection structure between the press switching mechanism and the keyway milling cutter of the present invention;

[0037] Figure 6 Schematic diagram of the internal structure of the face milling cutter of the present invention.

[0038] Figures: 1. Equipment body; 2. Longitudinal axis mechanism; 20. First motor; 21. Crescent telescopic rod; 22. Guide bar 1; 23. Transmission assembly; 230. First bevel gear; 231. Second bevel gear; 232. Fixed column; 233. Connecting frame; 234. Transmission belt; 24. Ball screw 1; 25. Screw sleeve 1; 3. Horizontal axis mechanism; 30. Second motor; 31. Ball screw 2; 32. Screw sleeve 2; 33. Guide bar 2; 4. Lifting mechanism; 40. Self-locking Motor; 41. Vertical block; 5. Drive motor; 6. Connecting table; 7. Coupling; 71. Third bevel gear; 72. Fourth bevel gear; 8. Milling cutter; 80. Face milling cutter; 801. Drive bar; 81. Keyway milling cutter; 9. Press-to-switch mechanism; 90. Fixed frame; 91. Guide sleeve; 911. Deep notch; 912. Shallow notch; 92. Push rod; 93. Linear rotary cam; 94. Transmission rod; 941. Drive slot; 95. Rebound mechanism; 951. Fixed ring; 952. Spring. DETAILED DESCRIPTION

[0039] The following will make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear. The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] The present invention will be further described below with reference to the embodiments. Figures 1 to 3 The present invention provides a technical solution: precision thread milling equipment, including: an equipment body 1, a longitudinal axis mechanism 2, a transverse axis mechanism 3, a lifting mechanism 4, a driving motor 5, a connecting platform 6, a coupling 7, and a milling cutter 8; the longitudinal axis mechanism 2 and the transverse axis mechanism 3 are used to drive the lifting mechanism 4 to move in the XY axis coordinate system; the milling cutter 8 includes a face milling cutter 80 and a keyway milling cutter 81 fixed and rotated in the connecting platform 6, and the keyway milling cutter 81 is arranged inside the face milling cutter 80. When the driving motor 5 rotates, the face milling cutter 80 and the keyway milling cutter 81 are driven to rotate synchronously through the coupling 7; the pressing switching mechanism 9 is fixed to the connecting platform 6 and is arranged above the face milling cutter 80; the lifting mechanism 4 is used to drive the connecting platform 6 to move upward and activate the pressing switching mechanism 9, so that the end of the keyway milling cutter 81 extends out of the end of the face milling cutter 80 or enters the end of the face milling cutter 80. When the pressing switching mechanism 9 is activated, the lifting mechanism 4 drives the connecting platform 6 to reset.

[0041] like Figure 2 As shown, the horizontal axis mechanism 3 includes a second motor 30, a second ball screw 31, and a second screw sleeve 32. The second motor 30 is fixed on one side of the device body 1, the second ball screw 31 is fixed to the rotating end of the second motor 30, the other end of the second ball screw 31 is rotatably connected to the device body 1, and the second screw sleeve 32 is rotatably connected to the surface of the second ball screw 31; the second motor 30 drives the second ball screw 31 to rotate, thereby driving the second screw sleeve 32 to move on the surface of the second ball screw 31.

[0042] like Figure 2As shown, the longitudinal axis mechanism 2 includes a first motor 20, a crescent-shaped telescopic rod 21, a guide bar 22, a transmission assembly 23, a ball screw 24, and a screw sleeve 25. The ball screw 24 is rotatably connected to one side of the screw sleeve 2 32, and the other end of the ball screw 24 is rotatably connected to the device body 1. The first motor 20 is fixed to one side of the device body 1, the crescent-shaped telescopic rod 21 is fixed to the rotating end of the first motor 20, and the other end of the crescent-shaped telescopic rod 21 is fixedly engaged with a transmission Component 23, the transmission component 23 is used to drive the ball screw 24 to rotate, and the surface of the ball screw 24 rotates the screw sleeve 25; when the screw sleeve 22 moves, the crescent-shaped telescopic rod 21 is driven to extend and retract synchronously through the transmission component 23. When the first motor 20 drives the crescent-shaped telescopic rod 21 to rotate, the crescent-shaped telescopic rod 21 drives the ball screw 24 to rotate on one side of the screw sleeve 22 through the transmission component 23, and the ball screw 24 drives the screw sleeve 25 to move on its surface.

[0043] like Figure 2 、 Figure 3 As shown, the transmission assembly 23 includes a connecting frame 233, which is fixed to one side of the screw sleeve 232, and a fixing column 232 is fixed to one side of the top of the connecting frame 233. The end of the fixing column 232 is rotatably connected to the second bevel gear 231, and the telescopic end of the crescent-shaped telescopic rod 21 is fixed to the first bevel gear 230. The first bevel gear 230 is meshed with the second bevel gear 231, and one end of the second bevel gear 231 is transmitted to the ball screw 24 through a transmission belt 234.

[0044] Guide bar 1 22 is fixed within the device body 1 and extends through a connecting bracket 233, which slides on the surface of guide bar 1 22. Guide bar 2 33 is fixed to one side of lead screw sleeve 2 32, while the other end of guide bar 2 33 is fixed to the device body 1. Guide bar 2 33 extends through lead screw sleeve 1 25, which slides on the surface of guide bar 2 33, allowing for smoother movement of lead screw sleeves 2 32 and 25. The first and second motors 20 and 30 are fixed to the same side of the device body 1, reducing the space in the device body 1 and providing more room for movement along the X and Y axes.

[0045] Specifically, the end of the fixing column 232 extends into the second bevel gear 231 and is fixed to rotation with the second bevel gear 231 through a bearing. A connecting column is fixed to the side of the first bevel gear 230 close to the fixing column 232. The connecting column passes through the fixing column 232. A pin is passed through the end of the connecting column away from the first bevel gear 230. The pin is used to limit the engagement of the first bevel gear 230 on the side of the second bevel gear 231. When the fixing column 232 moves, the crescent-shaped telescopic rod 21 is extended and retracted through the connecting column, so that the first bevel gear 230 is always engaged with the second bevel gear 231.

[0046] When in use, the second motor 30 drives the ball screw 2 31 to rotate, the ball screw 2 31 drives the screw sleeve 2 32 to move along its length direction, the screw sleeve 2 32 drives the connecting frame 233 to move, and the connecting frame 233 drives the crescent-shaped telescopic rod 21 to extend and retract synchronously through the fixed column 232; the first motor 20 drives the first bevel gear 230 to rotate through the crescent-shaped telescopic rod 21, the first bevel gear 230 drives the transmission belt 234 to rotate through the second bevel gear 231, and the transmission belt 234 drives the screw sleeve 1 25 to move along its length direction through the ball screw 1 24, and the screw sleeve 1 25 drives the lifting mechanism 4, and the lifting mechanism 4 drives the milling cutter 8 to move to the processing position through the connecting platform 6.

[0047] like Figure 2 As shown, one end of the connecting platform 6 is sleeved on the surface of the lifting mechanism 4, which is used to drive the connecting platform 6 to rise and fall. The lifting mechanism 4 is fixed to the screw sleeve 25; the driving motor 5 is fixed on the top surface of the connecting platform 6, and a coupling 7 is provided on the top of the face milling cutter 80. The face milling cutter 80 is linked to the rotating end of the driving motor 5 through the coupling 7; when the driving motor 5 rotates, the face milling cutter 80 is driven to rotate through the coupling 7.

[0048] Specifically, the lifting mechanism 4 includes a vertical block 41 and a self-locking motor 40 fixed to the top surface of the screw sleeve 25. The self-locking motor 40 is fixed to one side of the connecting platform 6. The rotating end of the self-locking motor 40 extends to the connecting platform 6 and is fixed with a gear. Grooves are opened on both sides of the vertical block 41. Racks are fixed on both sides of the groove close to the self-locking motor 40. The gears mesh with the racks. The connecting platform 6 is sleeved on one end of the vertical block 41 and has a roller that rotates. The roller is rotatably connected to the groove on the side away from the self-locking motor 40. When in use, the self-locking motor 40 drives the gear to rotate. Under the action of the rack, the rotating gear drives the connecting platform 6 to rise and fall along the height direction of the vertical block 41. When the self-locking motor 40 stops running, it completes self-locking and stably fixes the connecting platform 6 to the surface of the vertical block 41.

[0049] like Figure 4 As shown, in this embodiment, the coupling 7 is taken as the third bevel gear 71 and the fourth bevel gear 72 as an example. The third bevel gear 71 is fixed to the top of the face milling cutter 80, and the fourth bevel gear 72 is fixed to the rotating end of the drive motor 5. The third bevel gear 71 is meshed with the fourth bevel gear 72; when the face milling cutter 80 rotates, the face milling cutter 80 synchronously drives the keyway milling cutter 81 to rotate.

[0050] When using the face milling cutter 80, the keyway milling cutter 81 is located inside the face milling cutter 80 and will not interfere with the operation of the face milling cutter 80; when using the keyway milling cutter 81, the end of the keyway milling cutter 81 extends to the outside of the face milling cutter 80, and the face milling cutter 80 will not interfere with the operation of the keyway milling cutter 81.

[0051] like Figure 5As shown, the push-to-switch mechanism 9 includes a fixed frame 90, a guide sleeve 91, a push rod 92, a linear rotating cam 93, a transmission rod 94, and a rebound mechanism 95. The fixed frame 90 is fixed to the guide sleeve 91, and the fixed frame 90 is fixed to the surface of the connecting platform 6. The push rod 92 is limited in sliding in the guide sleeve 91. The bottom of the push rod 92 is provided with a linear rotating cam 93. The transmission rod 94 is rotatably provided in the linear rotating cam 93. The transmission rod 94 rotates and extends into the face milling cutter 80. The rebound mechanism 95 is provided in the face milling cutter 80. The top end of the keyway milling cutter 81 passes through the rebound mechanism 95 and is fixed to the bottom end of the transmission rod 94. When in use, the face milling cutter 80 drives the keyway milling cutter 81 to rotate synchronously through the transmission rod 94. The specific driving method is as follows:

[0052] like Figure 6 As shown, a driving groove 941 is provided on the surface of the transmission rod 94 along its length direction, and a driving bar 801 adapted to the driving groove 941 is fixed to the inner wall of the face milling cutter 80. When in use, the driving groove 941 is aligned with the driving bar 801 and inserted into the face milling cutter 80. When the face milling cutter 80 rotates, the driving groove 941 is driven by the driving bar 801, and the driving groove 941 drives the keyway milling cutter 81 to rotate synchronously with the face milling cutter 80 through the transmission rod 94.

[0053] When the connecting platform 6 moves upward, the push rod 92 contacts the equipment body 1, pressing the push rod 92 downward. The push rod 92 cooperates with the rebound mechanism 95 to drive the linear rotating cam 93 to enter the deep recess 911 or the shallow recess 912 opened in sequence on the surface of the guide sleeve 91. When the linear rotating cam 93 enters the deep recess 911, the keyway milling cutter 81 extends to the outside of the face milling cutter 80. When the linear rotating cam 93 enters the shallow recess 912, the keyway milling cutter 81 is located inside the face milling cutter 80.

[0054] In order to facilitate the push rod 92 to drive the linear rotating cam 93 to rotate linearly, the top surface of the linear rotating cam 93 is provided with an inclined surface facing one side, and the bottom end surfaces of the push rod 92 and the guide sleeve 91 are both provided with abutment surfaces adapted to the inclined surface. For example, when the push rod 92 is pressed down and drives the linear rotating cam 93 to leave the deep recess 911, the inclined surface of the top surface of the linear rotating cam 93 is caused to rotate slightly under the action of the rebound force of the rebound mechanism 95 and the guidance of the abutment surface of the bottom end surface of the push rod 92, so that the inclined surface of the top surface of the linear rotating cam 93 is completely embedded in the adjacent bottom end surface of the push rod 92. Between the two abutment surfaces, when the self-locking motor 40 is reset, the push rod 92 is disengaged from the equipment body 1, and continues to enter the guide sleeve 91 under the rebound force of the rebound mechanism 95. When the inclined surface of the top end surface of the linear rotating cam 93 is disengaged from the abutment surface of the bottom end surface of the push rod 92, it contacts the abutment surface of the bottom end surface of the guide sleeve 91. Similarly, under the guidance of the abutment surface of the bottom end surface of the guide sleeve 91, it enters the shallow recess 912. At this time, the keyway milling cutter 81 extends to the outside of the face milling cutter 80. The keyway milling cutter 81 is used, and there is no need to replace the face milling cutter 80, which saves replacement time and improves the processing efficiency of the workpiece.

[0055] It should be noted that the keyway milling cutter 81 and the face milling cutter 80 rotate around the same axis, that is, they rotate concentrically. When the keyway milling cutter 81 is used, there is no need to calibrate it again.

[0056] like Figure 5 As shown, the rebound mechanism 95 includes a fixing ring 951 and a spring 952. The fixing ring 951 is horizontally fixed in the face milling cutter 80, and the spring 952 is arranged between the fixing ring 951 and the bottom end of the transmission rod 94. The top of the keyway milling cutter 81 passes through the fixing ring 951 and the spring 952 in sequence, and the top of the keyway milling cutter 81 can be fixed to the bottom end of the transmission rod 94 through a thread; more preferably, a prism is fixed on the top of the keyway milling cutter 81, and the prism passes through the fixing ring 951 and the spring 952 in sequence, and extends to the bottom end of the transmission rod 94 to open a prism groove adapted to the prism, and then a pin is used to pass through the face milling cutter 80, the transmission rod 94 and the prism to complete the detachable fixation of the top of the keyway milling cutter 81 and the transmission rod 94. When the keyway milling cutter 81 needs to be replaced, the pin is pulled out and it can be replaced separately.

[0057] In order to better prevent the rotation of the transmission rod 94 from interfering with the linear rotating cam 93 and ensure the smooth switching of the press switching mechanism 9, the top end of the transmission rod 94 is rotatably fixed in the bottom end of the linear rotating cam 93 through a bearing.

[0058] During use, the milling cutter 8 is moved to the processing position through the longitudinal axis mechanism 2 and the transverse axis mechanism 3, and the vertical block 41 is started in the forward direction. The vertical block 41 drives the connecting table 6 to move up, and the push rod 92 contacts and presses down with the equipment body 1. The self-locking motor 40 starts in the reverse direction to drive the milling cutter 8 to reset and complete self-locking. The keyway milling cutter 81 extends to the outside of the face milling cutter 80. When only the face milling cutter 80 is needed, the same operation can be performed. The keyway milling cutter 81 is reset to the inside of the face milling cutter 80. The above operation can be completed without stopping the driving motor 5, avoiding frequent starting and stopping of the driving motor 5 when replacing the milling cutter. First, it can increase the service life of the driving motor 5. Second, when the milling cutter completes the switching, it has a stable speed. Compared with the existing technology, the time of waiting for the speed to stabilize is saved, and the processing efficiency is higher; the keyway milling cutter 81 rotates concentrically with the face milling cutter 80. When the switching is completed, there is no need to calibrate again, which further improves the processing efficiency.

[0059] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A precision thread milling device, comprising a device body (1), characterized in that: Also includes: The longitudinal axis mechanism (2) and the transverse axis mechanism (3) are used to drive the lifting mechanism (4) to move within the XY axis coordinate system, wherein the longitudinal axis mechanism (2) and the transverse axis mechanism (3) are arranged perpendicular to each other, and the lifting mechanism (4) is located on the longitudinal axis mechanism (2); A lifting mechanism (4) is used to drive the connecting platform (6) to move up and down; The milling cutter (8) comprises a face milling cutter (80) and a keyway milling cutter (81) fixedly rotated in the connecting platform (6), wherein the keyway milling cutter (81) is arranged to penetrate the interior of the face milling cutter (80); The driving motor (5) drives the face milling cutter (80) and the slot milling cutter (81) to rotate synchronously and concentrically through the coupling (7); The pressing switching mechanism (9) is fixed to the connecting platform (6) and is arranged above the face milling cutter (80). The lifting mechanism (4) is used to drive the connecting platform (6) to move upward to activate the pressing switching mechanism (9), so that the end of the keyway milling cutter (81) extends out of the end of the face milling cutter (80) or enters the end of the face milling cutter (80). When the pressing switching mechanism (9) is activated, the lifting mechanism (4) drives the connecting platform (6) to reset.

2. The precision thread milling equipment according to claim 1, characterized in that The pressing switching mechanism (9) comprises: A fixing frame (90) is fixed on the surface of the connecting platform (6); A guide sleeve (91) is fixed to the fixing frame (90); A push rod (92) is slidably connected in the guide sleeve (91); A linear rotating cam (93) is provided at the bottom of the push rod (92); A transmission rod (94) is rotatably connected to the bottom of the linear rotating cam (93), and the bottom end of the transmission rod (94) is rotatably extended into the face milling cutter (80); The rebound mechanism (95) is arranged in the face milling cutter (80), the top end of the keyway milling cutter (81) passes through the rebound mechanism (95) and is fixed to the bottom end of the transmission rod (94), and the face milling cutter (80) drives the keyway milling cutter (81) to rotate synchronously through the transmission rod (94).

3. The precision thread milling equipment according to claim 2, characterized in that: A driving groove (941) is provided on the surface of the transmission rod (94) along its length direction, and a driving bar (801) adapted to the driving groove (941) is fixed on the inner wall of the face milling cutter (80).

4. The precision thread milling equipment according to claim 2, characterized in that: When the push rod (92) is pressed down, the rebound mechanism (95) cooperates with the push rod (92) to drive the linear rotating cam (93) to enter the deep recess (911) or the shallow recess (912) sequentially opened on the surface of the guide sleeve (91). When the linear rotating cam (93) enters the deep recess (911), the keyway milling cutter (81) extends to the outside of the face milling cutter (80). When the linear rotating cam (93) enters the shallow recess (912), the keyway milling cutter (81) is located inside the face milling cutter (80).

5. The precision thread milling equipment according to claim 4, characterized in that: The top end surface of the linear rotating cam (93) is provided with an inclined surface facing one side, and the bottom end surfaces of the push rod (92) and the guide sleeve (91) are both provided with abutment surfaces adapted to the inclined surface, and the abutment surfaces adapted to the inclined surface are used to guide the linear rotating cam (93) into the shallow recess (912) or the deep recess (911).

6. The precision thread milling equipment according to claim 2, characterized in that: The rebound mechanism (95) includes a fixing ring (951) and a spring (952). The fixing ring (951) is fixed horizontally in the face milling cutter (80). The spring (952) is arranged between the fixing ring (951) and the bottom end of the transmission rod (94). The top end of the keyway milling cutter (81) passes through the fixing ring (951) and the spring (952) in sequence. The keyway milling cutter (81) is detachably fixed to the bottom end of the transmission rod (94).

7. The precision thread milling equipment according to claim 1, characterized in that: The transverse axis mechanism (3) comprises a second motor (30), a second ball screw (31), and a second screw sleeve (32). The second motor (30) is fixed to one side of the device body (1), the second ball screw (31) is fixed to the rotating end of the second motor (30), the other end of the second ball screw (31) is rotatably connected to the device body (1), and the second screw sleeve (32) is rotatably connected to the surface of the second ball screw (31); the second motor (30) drives the second ball screw (31) to rotate, thereby driving the second screw sleeve (32) to move on the surface of the second ball screw (31).

8. The precision thread milling equipment according to claim 7, characterized in that: The longitudinal axis mechanism (2) comprises a first motor (20), a crescent-shaped telescopic rod (21), a transmission assembly (23), a ball screw (24), and a screw sleeve (25). The ball screw (24) is rotatably connected to one side of the screw sleeve (32), and the other end of the ball screw (24) is rotatably connected to the inside of the device body (1). The first motor (20) is fixed to one side of the inside of the device body (1). The crescent-shaped telescopic rod (21) is fixed to the rotating end of the first motor (20), and the other end of the crescent-shaped telescopic rod (21) is fixedly engaged with the transmission assembly (23). The transmission assembly (23) is used to drive the ball screw (24) to rotate. The surface of the ball screw (24) is rotatably provided with the screw sleeve (25); when the screw sleeve (32) moves, the crescent-shaped telescopic rod (21) is driven to extend and retract synchronously through the transmission assembly (23).

9. The precision thread milling equipment according to claim 8, characterized in that: The transmission assembly (23) includes a connecting frame (233), the connecting frame (233) is fixed to one side of the second screw sleeve (32), a fixing column (232) is fixed to one side of the top of the connecting frame (233), the end of the fixing column (232) is rotatably connected to the second bevel gear (231), the telescopic end of the crescent-shaped telescopic rod (21) is fixed to the first bevel gear (230), the first bevel gear (230) is meshed with the second bevel gear (231), and one end of the second bevel gear (231) is transmitted to the first ball screw (24) through a transmission belt (234).

10. The precision thread milling equipment according to claim 9, characterized in that: One end of the connecting platform (6) is sleeved on the surface of the lifting mechanism (4), and the lifting mechanism (4) is fixed to the screw sleeve (25); the driving motor (5) is fixed on the top surface of the connecting platform (6), and a coupling (7) is provided on the top of the face milling cutter (80), and the face milling cutter (80) is linked to the rotating end of the driving motor (5) through the coupling (7).

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