Turn-milling machining platform capable of eliminating clearance

Abstract

The utility model relates to the technical field of machining, in particular to a turn-milling platform capable of eliminating clearance, which comprises a supporting seat, a longitudinal sliding rail is fixed at the upper end of the supporting seat, a cross beam is mounted on the longitudinal sliding rail in a sliding manner, and a linear rail subassembly is fixed on the front surface of the cross beam. A first sliding seat and a second sliding seat are mounted on the linear rail subassembly in a sliding manner, a vertical lifting mechanism is fixed on the first sliding seat, a transmission case is fixed on the vertical lifting mechanism, and a milling motor is fixed at the power input end of the transmission case. The device has the beneficial effects that one gear ring is driven to rotate through two groups of four driven gears, the rotating speed of the two groups of driven gears can be independently controlled, and lateral gaps of the gears can be eliminated through meshing transmission of the four gears and the gear ring in the driving process; and it is guaranteed that the workbench cannot generate large-amplitude vibration due to the action of the cutter during turning and milling, and therefore the machining precision of products is improved.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to a milling and turning platform that can eliminate backlash. Background Technology

[0002] There are many types of mill-turn machining centers, including vertical and horizontal models. Each type of machining center is adapted to various workpiece characteristics and features. Therefore, the customization of various machining processes is currently the main focus. These subdivided processes bring a variety of branches to this development project.

[0003] Chinese Patent Application No. 202210351240.0 discloses a milling and turning machining apparatus, including a rotary table, a milling cutter, a turning tool, a rotary module, a compensation module, a first lifting module, a second lifting module, and a transfer module. The rotary table drives the workpiece to rotate. The milling cutter is used to mill the workpiece. The turning tool is used to turn the rotating workpiece. The rotary module drives the milling cutter to rotate. The compensation module drives the turning tool to move along the feed direction. The first lifting module drives the turning tool to rise and fall. The second lifting module drives the milling cutter to rise and fall. The transfer module drives the milling cutter and the turning tool to move. The acceleration provided by the compensation module to the turning tool is greater than the acceleration provided by the transfer module. For disc-shaped parts, during milling and turning, since the part rotates during turning but not during milling, inaccurate positioning or unstable rotation speed of the rotary table can easily lead to workpiece vibration, affecting machining accuracy. The aforementioned milling and turning composite machining apparatus cannot solve this problem. Utility Model Content

[0004] The present invention proposes a milling and turning platform that can eliminate backlash in order to solve the above-mentioned problems.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A milling and turning platform with backlash elimination includes a support base. A longitudinal slide rail is fixed to the upper end of the support base. A crossbeam is slidably mounted on the longitudinal slide rail. A linear guide assembly is fixed to the front surface of the crossbeam. A first sliding seat and a second sliding seat are slidably mounted on the linear guide assembly. A vertical lifting mechanism is fixed to the first sliding seat. A transmission box is fixed to the vertical lifting mechanism. A milling motor is fixed to the power input end of the transmission box, and a milling cutter holder is fixed to the power output end of the transmission box. A vertically adjustable turning fixed shaft is fixed to the second sliding seat. A tool post is fixed to the lower end of the turning fixed shaft. Two sets of backlash elimination mechanisms are symmetrically fixed to the lower end of the support base. A worktable is rotatably mounted on the backlash elimination mechanism. The worktable is disc-shaped. A concentrically arranged gear ring is fixed to the lower surface of the worktable. The backlash elimination mechanism includes a servo motor. A drive gear is fixed to the power output shaft of the servo motor. Two driven shafts are symmetrically arranged on both sides of the drive gear. A transition gear that meshes with the drive gear is fixed to the lower end of each driven shaft. A driven gear that meshes with the gear ring is fixed to the upper end of each driven shaft.

[0007] Furthermore, a support ring is fixed on the servo motor, the driven shaft is fixed to the lower end face of the support ring by a bearing, and a thrust bearing is fixed between the upper end of the support ring and the lower surface of the worktable.

[0008] Furthermore, the turning fixed shaft is fixed to the second sliding seat by a vertical lifting mechanism.

[0009] The beneficial effects of this utility model by adopting the above technical solution are as follows: a gear ring is driven to rotate by two sets of four driven gears, and the rotation speed of the two sets of driven gears can be controlled independently. During the driving process, the lateral backlash of the gears can be eliminated by the meshing transmission between the four gears and the gear ring, ensuring that the worktable will not vibrate significantly due to the action of the cutting tool during turning and milling, thereby improving the machining accuracy of the product; the positions of the turning tool and the milling tool are adjustable, and the workpiece does not need to be fixed in the center of the worktable, which is convenient for machining asymmetrical workpieces. Attached Figure Description

[0010] In order 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. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0011] Figure 1 This is the front view of this utility model;

[0012] Figure 2This is a first perspective view of the present invention after the support base has been removed;

[0013] Figure 3 This is a second perspective view of the present invention after the support base has been removed;

[0014] Figure 4 This is a sectional view of the transmission box of this utility model;

[0015] Figure 5 This is a top view of the present invention.

[0016] The following are the descriptions of the reference numerals:

[0017] 1. Support base; 2. Crossbeam; 3. Linear guide assembly; 4. First sliding seat; 5. Transmission box; 6. Milling motor; 7. Milling cutter holder; 8. Second sliding seat; 9. Turning fixed shaft; 10. Tool post; 11. Worktable; 12. Gear ring; 13. Backlash elimination mechanism; 131. Servo motor; 132. Drive gear; 133. Driven shaft; 134. Transition gear; 135. Driven gear; 14. Vertical lifting mechanism; 15. Support ring. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figure 1-Figure 5As shown, a milling and turning platform with backlash elimination includes a support base 1. A longitudinal slide rail is fixed to the upper end of the support base 1, and a crossbeam 2 is slidably mounted on the longitudinal slide rail. A drive mechanism mounted on the longitudinal slide rail can drive the crossbeam 2 to move longitudinally to adjust its position. A linear guide assembly 3 is fixed to the front surface of the crossbeam 2, and a first sliding seat 4 and a second sliding seat 8 are slidably mounted on the linear guide assembly 3. A transverse drive mechanism (not shown in the figure) is fixed to both the first sliding seat 4 and the second sliding seat 8, which can drive the first sliding seat 4 and the second sliding seat 8 to move laterally on the crossbeam 2 to adjust the machining position. The first sliding seat 4 is equipped with a vertical lifting mechanism 14, which is a ball screw pair. A transmission box 5 is fixed on the vertical lifting mechanism 14. The vertical lifting mechanism 14 can drive the transmission box 5 to move up and down, thereby facilitating the control of the milling depth. A milling motor 6 is fixed at the power input end of the transmission box 5, and a milling cutter shank 7 is fixed at the power output end of the transmission box 5. The milling cutter shank 7 is used to fix the milling tool. A vertically adjustable turning fixed shaft 9 is fixed on the second sliding seat 8. A tool holder 10 is fixed at the lower end of the turning fixed shaft 9. The tool holder 10 is used to fix the turning tool. By adjusting the height of the turning fixed axis 9, turning can be performed on different positions of the workpiece. Two sets of backlash elimination mechanisms 13 are symmetrically fixed at the lower end of the support base 1. A worktable 11 is rotatably mounted on the backlash elimination mechanism 13. The worktable 11 has grooves formed on it for fixing fixtures. The workpiece to be processed is fixed on the worktable 11 by the fixtures. The worktable 11 is disc-shaped, and a concentrically arranged gear ring 12 is fixed on the lower surface of the worktable 11. The backlash elimination mechanism 13 includes a servo motor 131. A drive gear 132 is fixed on the power output shaft of the servo motor 131. Symmetrical gears are arranged on both sides of the drive gear 132. Two driven shafts 133 are provided. The lower end of each driven shaft 133 is fixed with an intermediate gear 134 that meshes with the driving gear 132. The upper end of each driven shaft 133 is fixed with a driven gear 135 that meshes with the gear ring 12. The servo motor 131 is controlled by a motor controller. The rotation speed of the servo motor 131 can be controlled by a control pulse signal. Each servo motor 131 can drive two driven gears 135 to rotate, which in turn drives the gear ring 12 to rotate, thereby adjusting the gap between the gear and the gear ring, reducing the vibration of the worktable 11 during the machining process, and improving the machining accuracy.

[0020] In this embodiment, a support ring 15 is fixed on the servo motor 131, and the driven shaft 133 is fixed on the lower end face of the support ring 15 through a bearing. A thrust bearing is fixed between the upper end of the support ring 15 and the lower surface of the worktable 11. The support ring 15 supports the worktable 11, which can ensure the support strength of the worktable 11.

[0021] In this embodiment, the turning fixed shaft 9 is fixed on the second sliding seat 8 by the vertical lifting mechanism 14. The vertical lifting mechanism 14 can drive the turning fixed shaft 9 to rise and fall automatically, thereby improving the intelligence of machining.

[0022] The working principle of this utility model is as follows: Before turning, the rotation speed of two servo motors 131 is controlled by the controller outputting pulse signals for a test run. The rotation speeds of the two servo motors 131 can have slight differences. Since both the driven gear 135 and the gear ring 12 are involute gears, when the driven gear 135 drives the worktable 11 to rotate, the four driven gears 135 symmetrically arranged on both sides of the worktable 11 drive the gear ring 12 to rotate, eliminating the lateral backlash of the gears and preventing horizontal vibration of the worktable 11 during rotation. After the workpiece is fixed on the upper surface of the worktable 11 using a fixture, turning is then performed. During milling, the workpiece rotates stably, achieving a machining accuracy of two passes. When milling, the milling cutter is fixed on the milling cutter shank 7. By adjusting the position of the first sliding seat 4 and the crossbeam 2, the milling cutter reaches the corresponding machining position, allowing milling of the workpiece end face fixed on the worktable 11. This machining platform can be used to turn the outer diameter, mill the end face, turn the inner hole, mill the groove hole, and drill holes. The rotation accuracy of the worktable 11 can achieve a tolerance of 0.05mm, facilitating the machining of high-precision workpieces. It is mainly used for machining large disc-shaped workpieces with a rotation diameter of 1.6-6.3 meters.

[0023] Components not described in detail in this article are existing technologies.

[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A milling and turning platform capable of eliminating backlash, characterized in that: The system includes a support base (1), a longitudinal slide rail fixed to the upper end of the support base (1), a crossbeam (2) slidably mounted on the longitudinal slide rail, a linear guide assembly (3) fixed to the front surface of the crossbeam (2), a first sliding seat (4) and a second sliding seat (8) slidably mounted on the linear guide assembly (3), a vertical lifting mechanism (14) fixed to the first sliding seat (4), a transmission box (5) fixed to the vertical lifting mechanism (14), a milling motor (6) fixed to the power input end of the transmission box (5), a milling cutter bar (7) fixed to the power output end of the transmission box (5), a vertically adjustable turning fixed shaft (9) fixed to the second sliding seat (8), a tool holder (10) fixed to the lower end of the turning fixed shaft (9), and the support base... (1) Two sets of backlash elimination mechanisms (13) are symmetrically fixed at the lower end. A worktable (11) is rotatably mounted on the backlash elimination mechanism (13). The worktable (11) is disc-shaped. A concentrically arranged gear ring (12) is fixed on the lower surface of the worktable (11). The backlash elimination mechanism (13) includes a servo motor (131). A drive gear (132) is fixed on the power output shaft of the servo motor (131). Two driven shafts (133) are symmetrically arranged on both sides of the drive gear (132). A transition gear (134) that meshes with the drive gear (132) is fixed at the lower end of each driven shaft (133). A driven gear (135) that meshes with the gear ring (12) is fixed at the upper end of each driven shaft (133).

2. The milling and turning platform with backlash elimination according to claim 1, characterized in that: The servo motor (131) is fixed with a support ring (15), the driven shaft (133) is fixed to the lower end face of the support ring (15) by a bearing, and a thrust bearing is fixed between the upper end of the support ring (15) and the lower surface of the worktable (11).

3. The milling and turning platform with backlash elimination according to claim 1, characterized in that: The turning fixed shaft (9) is fixed on the second sliding seat (8) by a vertical lifting mechanism (14).

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