A lightweight end mill spindle support system

Abstract

This invention discloses a lightweight milling cutter spindle support system, comprising: a horizontally movable support plate, a vertically movable follower rest on the support plate, a dovetail moving mechanism mounted on the follower rest, a milling cutter disc swing mechanism mounted at the end of the dovetail moving mechanism, and a milling cutter spindle mounted on the milling cutter disc swing mechanism; a balance cylinder counterweight mechanism is provided on the movable support plate, and the adjustment structure of the balance cylinder counterweight mechanism is in contact with the dovetail moving mechanism. By setting a movable milling cutter spindle moving mechanism, and a balance cylinder counterweight mechanism at the top of the milling cutter spindle moving mechanism, the piston rod of the cylinder can follow the extension and retraction movement of the milling cutter spindle to balance the weight of the milling cutter spindle. The advantages of this invention are: compact structure, stable and reliable milling cutter disc feed, good vibration resistance, light weight, high processing efficiency, and reduced machine tool energy consumption.

Description

Technical Field

[0001] This invention relates to the field of machining equipment technology, and in particular to a lightweight milling cutter spindle support system. Background Technology

[0002] Large-scale ball screw cyclone milling machines are high-efficiency ball screw roughing equipment. The milling cutter spindle carriage is the main moving component of this type of equipment. To ensure the stability and reliability of its movement and high machining accuracy, the structural rigidity of the entire carriage system must be considered during the design phase, reducing structural redundancy. Traditionally, the counterweight of the carriage system is achieved by adding a counterweight block. The purpose of the counterweight is to reduce the load on the vertical motion axis drive motor, reduce the wear of the drive ball screw, and improve the accuracy and stability of the moving components. The traditional counterweight method is to add a mass block with a mass equivalent to that of the moving component through a fixed pulley, which leads to a significant increase in the mass of the entire carriage system, increased energy consumption during carriage operation, and deterioration in stability and dynamic control performance. Summary of the Invention

[0003] In view of the above-mentioned defects or deficiencies, the purpose of this invention is to provide another lightweight milling cutter spindle support system.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: A lightweight milling cutter spindle support system includes: a horizontally movable pallet, a vertically movable follower rest on the pallet, a dovetail moving mechanism mounted on the follower rest, a milling cutter disc swing mechanism mounted at the end of the dovetail moving mechanism, and a milling cutter spindle mounted on the milling cutter disc swing mechanism; a balance cylinder counterweight mechanism is provided on the pallet, and the adjustment structure of the balance cylinder counterweight mechanism is in contact with the dovetail moving mechanism.

[0005] The movable pallet includes a sliding component disposed on the back of the movable pallet for horizontal movement, the sliding component cooperating with the machine tool, and a first power mechanism connected to the sliding component.

[0006] The sliding component includes: a closed rectangular sliding guide pair and a linear guide pair disposed on the milling machine; the first power mechanism includes: a first motor fixedly disposed on one side of the movable pallet, a reducer disposed at the output end of the first motor, a double backlash-free gear set disposed on the output shaft of the reducer, a lead screw disposed on the milling machine, a gear nut disposed on the lead screw, the external gear of the gear nut meshing with the double backlash-free gear set, and the double backlash-free gear set being driven to rotate by the first motor and the reducer, so that the gear nut moves horizontally along the lead screw.

[0007] The tool holder includes: a mounting plate symmetrically arranged on the movable support plate, a first ball screw pair mounted on the mounting plate, a matching nut mounted on the first ball screw pair, and a chuck for clamping the workpiece fixedly mounted on the matching nut; wherein, the upper end of the first ball screw pair is connected to a second reducer and a second motor through a first coupling.

[0008] The first ball screw pair has a double-segment forward and reverse thread structure, and a matching nut is provided on the forward and reverse thread structure respectively. The rotation of the double-segment forward and reverse thread structure can drive the matching nuts on both sides to move in opposite directions at the same time, thereby driving the jaws to self-center and clamp the workpiece.

[0009] The dovetail moving mechanism is disposed between the mounting plates. The dovetail moving mechanism includes: a second ball screw pair vertically mounted on the moving support plate, a milling cutter spindle bracket mounted on the screw nut of the second ball screw pair, and the milling cutter spindle bracket connected to the moving support plate through a dovetail guide rail; a third motor is mounted on the second ball screw pair through a second coupling.

[0010] The end of the milling cutter spindle support is equipped with a rotatable milling cutter disc swing mechanism, and the milling cutter spindle housing is installed inside the milling cutter disc swing mechanism; the milling cutter disc swing mechanism includes: an upper half shaft disposed at the upper end of the milling cutter spindle housing, and a worm gear shaft disposed at the lower end of the milling cutter spindle housing, a thrust ball bearing is mounted on the worm gear shaft, and a worm gear shaft meshing with the worm gear shaft is mounted on the milling cutter spindle support.

[0011] The counterweight mechanism of the balance cylinder is a nitrogen balance cylinder counterweight mechanism.

[0012] The nitrogen balance cylinder counterweight mechanism includes: a top support set at the top of the movable pallet, on which two symmetrically installed balance cylinders are mounted, the balance cylinders being distributed on both sides of the milling cutter spindle moving support.

[0013] One end of the balance cylinder is fixed to the top bracket, and the other end is fixed to the milling cutter spindle moving mechanism through a universal joint.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention provides a lightweight milling cutter spindle support system. By setting a movable milling cutter spindle moving mechanism, it changes the traditional method of equal mass block counterweight. A balance cylinder is set on the top of the milling cutter spindle moving mechanism. The piston rod of the cylinder can move in and out with the milling cutter spindle to balance the weight of the milling cutter spindle. The pressure oil in the piston of the balance cylinder pushes the piston rod to balance the weight of the milling cutter spindle. The advantages of this invention are: compact structure, stable and reliable milling cutter spindle feed, good vibration resistance, light weight, high processing efficiency, and reduced machine tool energy consumption. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the lightweight milling cutter spindle support system of the present invention; Figure 2 This is a front view of the lightweight milling cutter spindle support system of the present invention; Figure 3 yes Figure 2 Schematic diagram of the structure along section AA; Figure 4 yes Figure 2 Schematic diagram of the structure viewed along the CC axis; Figure 5 yes Figure 2 The P-direction view; Figure 6 This is a schematic diagram of the milling cutter spindle structure; Figure 7 yes Figure 2 Schematic diagram of the structure along the BB section.

[0017] In the diagram, 1—moving slide; 2—follower post; 3—milling cutter spindle; 4—milling cutter spindle moving mechanism; 5—milling cutter disc oscillating mechanism; 6—balance cylinder counterweight mechanism; 1-1—first motor; 1-2—first reducer; 1-3—double-linked backlash-free gear set; 1-4—gear nut; 1-5—closed rectangular sliding guide pair; 1-5-1—closed rectangular sliding guide pair groove; 1-5-2—bed rectangular guide; 1-6—linear guide pair; 1-7—dovetail guide; 2-1—second motor 1. Machine; 2-2—Second reducer; 2-3—First coupling; 2-4—First ball screw pair; 2-5—Nut; 2-6—Claw; 2-7—Mounting plate; 4-1—Third motor; 4-2—Second coupling; 4-3—Second ball screw pair; 4-4—Milling cutter spindle support; 5-1—Upper shaft; 5-2—Worm gear shaft; 5-3—Thrust ball bearing; 5-4—Worm gear shaft; 6-1—Gas cylinder; 6-2—Balance cylinder; 6-3—Bracket; 6-4—Universal joint. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the protection scope of the present invention.

[0020] like Figure 1 , 2As shown, the present invention provides a lightweight milling cutter spindle support system, including: a movable slide 1, a self-centering follower 2, a milling cutter spindle moving mechanism 4, a milling cutter disc swinging mechanism 5, and a nitrogen balance cylinder counterweight mechanism 6.

[0021] Specifically, the movable pallet 1 is provided with a vertically movable follower 2, the follower 2 is equipped with a dovetail moving mechanism 4, the end of the dovetail moving mechanism 4 is equipped with a milling cutter disc swing mechanism 5, and the milling cutter disc swing mechanism 5 is equipped with a milling cutter spindle 3; the movable pallet 1 is provided with a balance cylinder counterweight mechanism 6, and the adjustment structure of the balance cylinder counterweight mechanism 6 is in contact with the dovetail moving mechanism 4.

[0022] For example, in this invention, the movable pallet 1 includes: a sliding component disposed on the back of the movable pallet 1 for horizontal movement, the sliding component cooperating with the machine tool, and a first power mechanism connected to the sliding component.

[0023] Specifically, such as Figure 4 As shown, the sliding component includes: a closed rectangular sliding guide pair 1-5 and a linear guide pair 1-6 disposed on the milling machine. The closed rectangular sliding guide pair 1-5 includes a closed rectangular sliding guide pair groove 1-5-1 and a bed rectangular guide rail 1-5-2. The closed rectangular sliding guide pair groove 1-5-1 is disposed at the bottom of the moving slide plate 1 and can be matched with the bed rectangular guide rail 1-5-2. It is then combined with the linear guide pair 1-6 to form a combined guide rail. The bed rectangular guide rail 1-5-2 can compensate for the adverse effects of the weakened load-bearing capacity and poor guiding accuracy caused by the poor stress state when the linear guide pair 1-6 is arranged vertically. The first power mechanism includes: a first motor 1-1 fixedly mounted on one side of the movable pallet 1; a reducer 1-2 mounted at the output end of the first motor 1-1; a double-backlash-free gear set 1-3 mounted on the output shaft of the reducer 1-2; a lead screw mounted on the milling machine; and a gear nut 1-4 mounted on the lead screw. The external gear of the gear nut 1-4 meshes with the double-backlash-free gear set 1-3. The first motor 1-1 and the reducer 1-2 drive the double-backlash-free gear set 1-3 to rotate, causing the gear nut 1-4 to move horizontally along the lead screw. The first motor 1-1 drives the double-backlash-free gear set 1-3, and the gear nut 1-4 meshes with the gear set 1-3 via the reducer 1-2. Under the drive of the gear nut, the movable pallet performs longitudinal feed motion along the rectangular guide rail 1-5 and the linear guide rail 1-6.

[0024] like Figure 3As shown, the tool holder 2 includes: a mounting plate 2-7 symmetrically arranged on the movable support plate 1; a first ball screw pair 2-4 is mounted on the mounting plate 2-7; a matching nut 2-5 is mounted on the first ball screw pair 2-4; and a chuck 2-6 for clamping the workpiece is fixedly mounted on the matching nut 2-5; the upper end of the first ball screw pair 2-4 is connected to a second reducer 2-2 and a second motor 2-1 via a first coupling 2-3.

[0025] The first ball screw pair 2-4 has a double-segment forward and reverse thread structure, and the forward and reverse thread structure is respectively provided with matching nuts 2-5. The rotation of the double-segment forward and reverse thread structure can drive the matching nuts 2-5 on both sides to move in opposite directions at the same time, thereby driving the jaws 2-6 to self-center and clamp the workpiece.

[0026] like Figure 4 , 5 As shown, the dovetail moving mechanism 4 is disposed between the mounting plates 2-7. The dovetail moving mechanism 4 includes: a second ball screw pair 4-3 vertically mounted on the moving support plate 1, a milling cutter spindle bracket 4-4 mounted on the screw nut of the second ball screw pair 4-3, and the milling cutter spindle bracket 4-4 connected to the moving support plate 1 through the dovetail guide rail 1-7; a third motor 4-1 is mounted on the second ball screw pair 4-3 through a second coupling 4-2.

[0027] like Figure 6 , 7 As shown, a rotatable milling cutter head swing mechanism 5 is installed at the end of the milling cutter spindle support 4-4, wherein the milling cutter spindle 3 housing is installed inside the milling cutter head swing mechanism 5; the milling cutter head swing mechanism 5 includes: an upper half shaft 5-1 disposed at the upper end of the milling cutter spindle 3 housing, and a worm gear shaft 5-2 disposed at the lower end of the milling cutter spindle 3 housing, a thrust ball bearing 5-3 is installed on the worm gear shaft 5-2, and a worm gear shaft 5-4 meshing with the worm gear shaft 5-2 is installed on the milling cutter spindle support 4-4.

[0028] Preferably, in this invention, the counterweight mechanism 6 of the balance cylinder is a nitrogen balance cylinder counterweight mechanism. Specifically, as shown below... Figure 2As shown, the nitrogen balance cylinder counterweight mechanism includes: a top support 6-3 mounted on the top of the movable support plate 1, on which two symmetrically mounted balance cylinders 6-2 are distributed on both sides of the milling cutter spindle moving support 4-4. One end of each balance cylinder 6-2 is fixed to the top support 6-3, and the other end is fixed to the milling cutter spindle moving mechanism 4 via a universal joint 6-4. The piston rod of the balance cylinder 6-2 follows the up-and-down feed motion of the milling cutter spindle 3. The pressure oil inside the balance cylinder 6-2 acts on the piston rod, and the tension of the piston rod is balanced with the weight of the milling cutter itself. Manually rotating the worm shaft 5-4, through the meshing worm wheel shaft 5-2, drives the milling cutter spindle 3 to swing. The pistons of the two-sided balance cylinders 6-2 are connected to the milling cutter spindle via universal joints 6-4. The upper part of the gas cylinder 6-1 is filled with nitrogen gas at a certain pressure, and the lower part is filled with hydraulic oil. The gas pressure acts on the piston through the hydraulic oil, and the piston's pulling force is used to balance the weight of the milling cutter spindle. The claims of this balancing system are limited to the configuration method, and its principle is not claimed.

[0029] It should be noted that the first, second, and third motors 1-1, 2-1, and 4-1 used in this invention are all servo motors, or other power transmission mechanisms.

[0030] The working process of this invention is as follows: The first motor 1-1 drives the double-backlash-free gear set 1-3 through the reducer 1-2. The gear nut 1-4 meshes with the gear set 1-3. Under the drive of the gear nut, the moving slide moves longitudinally along the rectangular guide rail pair 1-5 and the linear guide rail pair 1-6. Two sets of tool holders 2 are mounted on the side of the moving slide 1. The second motor 2-1 drives the first double-helix ball screw 2-4 to rotate through the first reducer 2-2 and the coupling 2-3. The upper and lower nuts 2-5 move towards each other, causing the upper and lower jaws 2-6 to automatically center and hold the workpiece. The moving slide 1 is equipped with a dovetail guide rail 1-7. The servo motor 4-1 drives the second ball screw pair 4-3 to rotate through the coupling 4-2. The milling cutter spindle support 4-4 is fixed to the nut of the second ball screw pair 4-3. The rotation of the nut drives the milling cutter spindle 3 to move laterally. The piston rod of the balance cylinder 6-2 moves in extension and retraction with the milling cutter spindle 3 to balance its own weight. Manually rotate the worm shaft 5-4, which in turn drives the milling cutter spindle 3 to oscillate via the meshing worm wheel shaft 5-2.

[0031] It will be apparent to those skilled in the art that the above specific examples are merely preferred embodiments of the present invention. Therefore, any improvements or modifications that those skilled in the art may make to certain parts of the present invention still embody the principles of the present invention and achieve the objectives of the present invention, and all fall within the scope of protection of the present invention.

Claims

1. A lightweight milling cutter spindle support system, characterized in that, include: A horizontally movable pallet (1) is provided with a vertically movable follower (2), and a dovetail moving mechanism (4) is installed on the follower (2). A milling cutter disc swing mechanism (5) is installed at the end of the dovetail moving mechanism (4), and a milling cutter spindle (3) is installed on the milling cutter disc swing mechanism (5). A balance cylinder counterweight mechanism (6) is provided on the movable pallet (1), and the adjustment structure of the balance cylinder counterweight mechanism (6) is in contact with the dovetail moving mechanism (4).

2. The lightweight end mill spindle support system according to claim 1, characterized in that, The movable pallet (1) includes a sliding component disposed on the back of the movable pallet (1) for horizontal movement, the sliding component cooperating with the machine tool, and a first power mechanism connected to the sliding component.

3. The lightweight end mill spindle support system according to claim 2, characterized in that, The sliding component includes: a closed rectangular sliding guide pair (1-5) and a linear guide pair (1-6) disposed on the milling machine; the first power mechanism includes: a first motor (1-1) fixedly disposed on one side of the movable pallet (1), a reducer (1-2) disposed at the output end of the first motor (1-1), a double backlash-free gear set (1-3) disposed on the output shaft of the reducer (1-2), a lead screw disposed on the milling machine, a gear nut (1-4) disposed on the lead screw, the external gear of the gear nut (1-4) meshes with the double backlash-free gear set (1-3), and the double backlash-free gear set (1-3) is driven to rotate by the first motor (1-1) and the reducer (1-2) so that the gear nut (1-4) moves horizontally along the lead screw.

4. The lightweight end mill spindle support system according to claim 1, characterized in that, The tool holder (2) includes: a mounting plate (2-7) symmetrically arranged on the movable support plate (1), a first ball screw pair (2-4) is mounted on the mounting plate (2-7), a matching nut (2-5) is mounted on the first ball screw pair (2-4), and a chuck (2-6) for clamping the workpiece is fixedly mounted on the matching nut (2-5); the upper end of the first ball screw pair (2-4) is connected to a second reducer (2-2) and a second motor (2-1) through a first coupling (2-3).

5. The lightweight end mill spindle support system according to claim 4, characterized in that, The first ball screw pair (2-4) has a double-segment forward and reverse thread structure, and a matching nut (2-5) is provided on the forward and reverse thread structure respectively. The rotation of the double-segment forward and reverse thread structure can drive the matching nuts (2-5) on both sides to move in opposite directions at the same time, thereby driving the jaws (2-6) to self-center and clamp the workpiece.

6. The lightweight end mill spindle support system according to claim 4, characterized in that, The dovetail moving mechanism (4) is disposed between the mounting plates (2-7). The dovetail moving mechanism (4) includes: a second ball screw pair (4-3) vertically mounted on the moving support plate (1), a milling cutter spindle bracket (4-4) mounted on the screw nut of the second ball screw pair (4-3), and the milling cutter spindle bracket (4-4) being connected to the moving support plate (1) via the dovetail guide rail (1-7); and a third motor (4-1) mounted on the second ball screw pair (4-3) via a second coupling (4-2).

7. The lightweight end mill spindle support system according to claim 5, characterized in that, The end of the milling cutter spindle support (4-4) is equipped with a rotatable milling cutter disc swing mechanism (5), and the milling cutter spindle (3) housing is installed inside the milling cutter disc swing mechanism (5); the milling cutter disc swing mechanism (5) includes: an upper half shaft (5-1) set at the upper end of the milling cutter spindle (3) housing, and a worm gear shaft (5-2) set at the lower end of the milling cutter spindle (3) housing, a thrust ball bearing (5-3) is installed on the worm gear shaft (5-2), and a worm gear shaft (5-4) meshing with the worm gear shaft (5-2) is installed on the milling cutter spindle support (4-4).

8. The lightweight end mill spindle support system according to claim 1 or 7, characterized in that, The counterweight mechanism (6) of the balance cylinder is a nitrogen balance cylinder counterweight mechanism.

9. The lightweight end mill spindle support system according to claim 8, characterized in that, The nitrogen balance cylinder counterweight mechanism includes: a top support (6-3) set at the top of the movable support plate (1), and two symmetrically installed balance cylinders (6-2) on the top support (6-3), which are distributed on both sides of the milling cutter spindle shift support (4-4).

10. The lightweight end mill spindle support system according to claim 9, characterized in that, One end of the balance cylinder (6-2) is fixed to the top bracket (6-3), and the other end is fixed to the milling cutter spindle moving mechanism (4) through a universal joint (6-4).

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