A professional milling and drilling machine for rotary devices

Abstract

The application provides a professional milling and drilling machine tool of a slewing device, which comprises a mounting base, a rotating arm frame provided on the mounting base through a slewing platform, and a power head provided at one end of the rotating arm frame; a cutter head is provided on the power head; a cutting stepping mechanism is provided on a head base body, the cutting stepping mechanism comprises a rotating cylinder frame, a follow-up roller is provided at the bottom of the rotating cylinder frame, a rotatable pin shaft is provided at one end of the rotating cylinder frame; the cutting stepping mechanism further comprises an electric control magnetic suction base, a cylinder support is provided on the electric control magnetic suction base, a telescopic feeding driving device is provided on the cylinder support, and a push rod of the telescopic feeding driving device is connected with the pin shaft; according to the scheme, the rotating arm frame can rotate around the slewing platform, and the power head can slide along the rotating arm frame, so that different diameter slewing bearings can be processed according to requirements, and the problem that the processing range is easily limited by conventional machine tools is broken through.

Description

Technical Field

[0001] This invention relates to the field of mechanical equipment manufacturing technology, specifically to a specialized milling and drilling machine tool with a rotary device. Background Technology

[0002] The slewing mechanism is an important component that provides rotational motion for mechanical equipment. For example, the slewing bearing is a typical slewing mechanism. The slewing mechanism is a ring-shaped structural component and is widely used in excavators and cranes. The rotating parts of excavators and cranes rely on the slewing mechanism to transmit power, and its machining accuracy directly determines the machine's performance and lifespan. The size of the slewing mechanism varies depending on the tonnage of the machine. The size of the slewing mechanism for small excavators can be about one to two meters. This type of slewing mechanism can be manufactured through ordinary machining.

[0003] A machining method for a slewing bearing is disclosed in patent application number 201911142635.4, published on March 24, 2020. This method includes the following machining process for the outer ring: rough turning - first boring - semi-finish turning - first finish turning - rolling.

[0004] The machining process for the inner ring is as follows: rough turning - first boring - first finish turning - gear hobbing - raceway quenching - gear quenching - machine tool shaping - tempering - second finish turning - drilling - turning and grinding - second boring. This method uses ordinary turning and boring to machine the slewing bearing, which is suitable for machining smaller slewing bearings.

[0005] The patent application with application number 201610852816.6 and authorization announcement date of March 29, 2019 discloses a machining method and support for a slewing bearing. The present invention discloses a machining method for a slewing bearing, which involves clamping a forged blank onto a lathe, correcting the inner hole runout to ≤1.5mm and the end face runout to ≤1.2mm, machining the outer diameter according to the machining process drawing, controlling the dimensional deviation to ±0.7mm, and retaining a allowance of 5-10mm, machining the reference surface C, ensuring that it is free of defects, and chamfering the inner and outer diameters of the reference surface C with 2×45°. The present invention discloses a method for machining a slewing bearing. During semi-finish turning, a allowance is left. After heat treatment of the raceway, plugging hole, and tapered pin hole (I), the bearing is machined to the dimensions required by the drawing. Then, the plugging hole and tapered pin hole are subjected to a second heat treatment to improve the diffusion layer structure of the plugging hole and tapered pin hole, refine the grains, and further increase their hardness. This makes the surface hardness of the plugging hole and tapered pin hole greater than the hardness of the raceway, making it more wear-resistant and stress-bearing. This ensures that it will not deform during long-term use and will not affect the precision operation of the device. This solution still uses lathe machining to process the slewing bearing and is only suitable for machining smaller slewing bearings.

[0006] Large cranes, such as those used in ports, can have slewing devices that are over ten meters in size. Obviously, such large slewing devices cannot be machined using conventional machine tools. Therefore, we need a solution for machining large slewing devices. Summary of the Invention

[0007] To address the problems existing in the prior art, this invention provides a specialized milling and drilling machine tool for rotary devices, solving the problem that large-sized rotary devices cannot be processed by conventional methods.

[0008] To achieve the above objectives, the technical solution of the present invention is as follows: a professional milling and drilling machine tool with a rotary device, comprising a mounting base, a cantilevered rotating arm mounted on the mounting base via a rotary platform, a head horizontal sliding device and a head horizontal drive device mounted at one end of the rotating arm, a head seat mounted on the head horizontal sliding device, a head vertical sliding device and a head vertical drive device mounted on the head seat, a power head mounted on the head vertical sliding device, and a cutter head mounted on the rotating shaft of the power head;

[0009] A cutting stepping mechanism is provided on the machine head base. The cutting stepping mechanism includes a rotating cylinder frame, and one or more follower rollers are provided at the bottom of the rotating cylinder frame. A rotatable pin is provided vertically downward at one end of the rotating cylinder frame. The cutting stepping mechanism also includes an electrically controlled magnetic base, on which a hydraulic cylinder support is provided. A telescopic feed drive device is provided on the hydraulic cylinder support. The push rod of the telescopic feed drive device is connected to the pin.

[0010] A locking mechanism is provided on the rotary platform. The locking mechanism includes a handwheel, a reduction gearbox, and a locking gear. The reduction gearbox housing is installed on the rotary platform. The output end of the reduction gearbox is connected to the locking gear, and the locking gear is connected to the rotary platform.

[0011] The slewing platform is also equipped with a power pump station and an electrical control mechanism; a counterweight device is also provided at the other end of the rotating boom.

[0012] With the above settings, the rotating boom can rotate around the slewing platform, and the power head can slide along the rotating boom. This allows for the processing of slewing bearings of different diameters as required. Theoretically, it is possible to process slewing bearings of infinite diameter, which overcomes the problem of being limited in processing range when using conventional machine tools, such as lathes and machining centers.

[0013] An important step in using this machine tool is to first machine an initial reference surface on the slewing bearing to be machined, then adjust the follower roller to be close to the initial reference surface and lock it, adjust the bottom end face of the cutter head to be flush with the initial reference surface, and then start the machine to machine. With the help of the electrically controlled magnetic suction base and the telescopic feed drive device, the required surface can be machined step by step from the initial reference surface of the slewing bearing around the slewing bearing.

[0014] The locking mechanism acts on the rotary platform through the gearbox and locking gear, which can lock the rotary platform during drilling and milling operations and when the machine is stopped and idle, preventing unnecessary rotational movement.

[0015] The counterweight device can balance the weight on one side of the rotating boom, reduce the unbalanced force on one side of the rotary platform, improve the accuracy of the rotary motion, reduce the vibration phenomenon during the cutting head machining process, and improve the machining accuracy of the plane.

[0016] The power pump station and electrical control mechanism provide power and control for the machine tool.

[0017] Furthermore, the slewing platform includes a slewing bearing connected to a mounting base; a gear ring is provided on the slewing bearing, and a locking gear meshes with the gear ring. The slewing bearing facilitates the rotational movement of the boom, and the locking gear can lock and unlock the boom via the slewing bearing.

[0018] Furthermore, the machine head horizontal sliding device includes one or more horizontal guide rails horizontally arranged on both sides of the rotating arm, and a horizontal slider is provided on the machine head base, which cooperates with the horizontal guide rails; the machine head horizontal drive device is a first electric push rod, the base of which is mounted on the rotating arm, and the nut of which is mounted on the machine head base. By setting the horizontal guide rails and the horizontal slider, the radial movement of the power machine head can be easily realized, adapting to different processing radius ranges; the electric push rod is selected as the machine head horizontal drive device because it operates precisely and is easy to control.

[0019] Furthermore, the vertical sliding device for the machine head includes one or more vertical guide rails vertically mounted on the machine head base, and a vertical slider on the housing of the power machine head, which cooperates with the vertical guide rails. The vertical drive device for the machine head is a second electric push rod, the base of which is mounted on the machine head base and the housing of the spindle motor of the second electric push rod. By setting up the vertical guide rails and the vertical slider, the lifting and lowering of the power machine head can be easily achieved, facilitating tool setting and feeding.

[0020] Furthermore, the rotating boom has two horizontal guide rails on each side. With two rails on each side, there are a total of four horizontal guide rails providing movement tracks for the power head, effectively ensuring the smooth operation of the power head.

[0021] Furthermore, the machine head base has two vertical guide rails. These two vertical guide rails provide a stable track for the lifting and lowering of the power machine head.

[0022] Furthermore, the telescopic feed drive is a stepping cylinder. Stepping cylinders are simple to control and can provide stable thrust.

[0023] Furthermore, the power head is a high-precision CNC spindle motor. High-precision CNC spindle motors are small in size, run smoothly, and are easy to control. Attached Figure Description

[0024] Figure 1 This is the front view of the present invention;

[0025] Figure 2 This is a top view of the present invention;

[0026] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0027] Figure 4 for Figure 2 Enlarged view at point B in the middle;

[0028] Figure 5 This is a schematic diagram of the cutting stepping mechanism;

[0029] Figure 6 This is a schematic diagram of the locking mechanism. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0031] like Figures 1 to 6 As shown, a specialized milling and drilling machine tool with a rotary device includes a mounting base 1, on which a cantilevered rotating arm 3 is mounted via a rotary platform 2.

[0032] The slewing platform 2 includes a slewing bearing 201, which is connected to the mounting base 1. A gear ring is provided on the slewing bearing 201, which provides the motion basis for the rotation of the rotating boom 3. In addition, the rotating boom 3 can be locked by the gear ring.

[0033] A horizontal sliding device 4 and a horizontal driving device for the machine head are provided at one end of the rotating boom 3. A machine head seat 6 is provided on the horizontal sliding device 4. In this embodiment, the horizontal sliding device 4 includes one or more horizontal guide rails 41 horizontally arranged on both sides of the rotating boom 3. A horizontal slider (not shown) is provided on the machine head seat 6. The horizontal slider cooperates with the horizontal guide rail 41. In this embodiment, there are two horizontal guide rails on one side of the rotating boom 3. The horizontal driving device for the machine head is a first electric push rod 5. The seat of the first electric push rod 5 is installed on the rotating boom 3, and the nut of the first electric push rod 5 is installed on the machine head seat 6. By setting horizontal guide rail 41 and horizontal slider, the radial movement of the machine head base 6 can be easily realized to adapt to different machining radius ranges; an electric push rod is selected as the horizontal drive device for the machine head, which operates with precision and is easy to control; the rotating arm 3 can rotate around the rotary platform 2, and the power machine head can slide along the rotating arm 3, so that slewing bearings of different diameters can be machined as required. Theoretically, slewing bearings of infinite diameter can be machined, which overcomes the problem of the machining range being easily limited by conventional machine tools, such as lathes and machining centers.

[0034] A vertical sliding device 7 and a vertical drive device (not shown) are provided on the headstock 6. A power head 9 is provided on the vertical sliding device 7. In this embodiment, the power head 9 is a high-precision CNC spindle motor. The high-precision CNC spindle motor is small in size, runs smoothly, and is easy to control.

[0035] like Figure 2 and Figure 4 As shown, the vertical sliding device 7 of the machine head includes one or more vertical guide rails 71 vertically mounted on the machine head base 6. A vertical slider 72 is provided on the housing of the power machine head 9, and the vertical slider 72 cooperates with the vertical guide rails 71. In this embodiment, there are two vertical guide rails on the machine head base 6. The vertical driving device of the machine head is a second electric push rod, the base of which is mounted on the machine head base 6, and the push rod of the second electric push rod is connected to the housing of the power machine head 9. By setting the vertical guide rails 71 and the vertical slider 72, the lifting and lowering of the power machine head 9 can be easily realized, which facilitates tool setting and feeding.

[0036] A cutter head 10 is provided on the rotating shaft of the power head 9. Various types of cutting tools can be installed on the cutter head 10 to expand the application range of the machine tool.

[0037] like Figure 5As shown, a cutting stepping mechanism 8 is provided on the machine head base 6. The cutting stepping mechanism 8 includes a rotating cylinder 80, and one or more follower rollers 81 are provided at the bottom of the rotating cylinder 80. In this embodiment, the number of follower rollers 81 is four. A rotatable pin 82 is provided vertically downward at one end of the rotating cylinder 80. The cutting stepping mechanism 8 also includes an electrically controlled magnetic base 83, on which a hydraulic cylinder support 84 is provided. A telescopic feed drive device is provided on the hydraulic cylinder support 84. The push rod of the telescopic feed drive device is connected to the pin 82. In this embodiment, the telescopic feed drive device is a stepping hydraulic cylinder 85.

[0038] like Figure 2 and Figure 6 As shown, a locking mechanism 11 is provided on the rotary platform 2. The locking mechanism 11 includes a handwheel 111, a reduction gearbox 112, and a locking gear 113. The housing of the reduction gearbox 112 is mounted on the rotary platform 2, and the output end of the reduction gearbox 112 is connected to the locking gear 113. The locking gear 113 meshes with the slewing bearing 201 of the rotary platform 2. A friction plate brake is provided inside the reduction gearbox 112, which is normally in brake lock mode and can be disengaged by a control handle. When the brake is engaged, the mounting base 1 and the rotary platform 2 are fixed together, thus locking the rotary platform 2. When the brake is disengaged, the locking gear 113 can rotate around the gear ring on the slewing bearing 201. The locking mechanism 11 acts on the rotary platform 2 through the reduction gearbox 112 and the locking gear 113, which can lock the rotary platform 2 during drilling and milling operations and when the machine is stopped, preventing unnecessary rotational movement.

[0039] The rotary platform 2 is also equipped with a power pump station and an electrical control mechanism, which provide power and control for the machine tool.

[0040] A counterweight device 12 is also provided at the other end of the rotating boom 3. The counterweight device 12 can balance the weight on one side of the rotating boom 3, reduce the unbalanced force on one side of the rotating platform 2, improve the rotational motion accuracy, reduce the vibration phenomenon during the cutting head machining process, and improve the machining accuracy of the plane.

[0041] When machining the annular circumferential surface of a workpiece using this equipment, first, based on the relative height of the workpiece's surface to be machined, find a machining fixture platform and place it approximately at the center of the workpiece. Install this equipment on the machining fixture platform, adjust the rotation center to coincide with the rotation center of the workpiece, and fix it securely. The radial and vertical machining feed strokes of the cutter head 10 of the power head 9 should meet the machining needs of the workpiece. Appropriately equip the counterweights according to different machining radii. Manually rotate the rotating platform's rotating arm 3, using the cutter head 10 to check and correct the relative uniformity of the machining allowance on the workpiece surface. Lock the rotating platform, start the equipment, and use the first electric push rod 5 to radially cut the workpiece until an initial reference surface of 2-3 cutter head 10 widths is machined. Release the lock. Mechanism 11 checks and corrects the workpiece plane again using the machined initial reference surface to ensure that the allowance is sufficient and relatively uniform; rotates the cutter head 10 to the initial reference surface, makes the follower roller close to the initial reference surface and locks it, adjusts the bottom end face of the cutter head to be flush with the initial reference surface, and locks the first electric push rod 5; retracts the stroke of the stepping cylinder 85 to a full extent, places it at an appropriate position on the plane to be machined and starts the electrically controlled magnetic base 83; connects the power supply to start the power pump station and starts the power head 9; after adjusting the speed of the cutter head 10 and the feed speed of the stepping cylinder, starts the circumferential annular plane milling; after one stroke of the stepping cylinder 85 is completed, closes the electrically controlled magnetic base 83, retracts the stroke to a full extent, repositions and fixes it, and then continues the milling process until the entire surface is machined.

Claims

1. A specialized milling and drilling machine tool with a rotary device, characterized in that: The device includes a mounting base, on which a cantilevered rotating boom is mounted via a rotary platform. At one end of the rotating boom are a horizontal sliding device and a horizontal drive device for the machine head. A machine head base is mounted on the horizontal sliding device, and a vertical sliding device and a vertical drive device for the machine head are mounted on the machine head base. A power machine head is mounted on the vertical sliding device. A cutter head is mounted on the rotating shaft of the power machine head. A cutting stepping mechanism is provided on the machine head base. The cutting stepping mechanism includes a rotating cylinder frame, and one or more follower rollers are provided at the bottom of the rotating cylinder frame. A rotatable pin is provided vertically downward at one end of the rotating cylinder frame. The cutting stepping mechanism also includes an electrically controlled magnetic base, on which a hydraulic cylinder support is provided. A telescopic feed drive device is provided on the hydraulic cylinder support. The push rod of the telescopic feed drive device is connected to the pin. A locking mechanism is provided on the rotary platform. The locking mechanism includes a handwheel, a reduction gearbox, and a locking gear. The reduction gearbox housing is installed on the rotary platform. The output end of the reduction gearbox is connected to the locking gear, and the locking gear is connected to the rotary platform. The slewing platform is also equipped with a power pump station and an electrical control mechanism; a counterweight device is also provided at the other end of the rotating boom. The rotary platform includes a slewing bearing, which is connected to the mounting base; a gear ring is provided on the slewing bearing, and a locking gear meshes with the gear ring; The machine head horizontal sliding device includes one or more horizontal guide rails horizontally arranged on both sides of the rotating boom, and a horizontal slider is provided on the machine head base, which cooperates with the horizontal guide rail; the machine head horizontal driving device is a first electric push rod, the base of the first electric push rod is installed on the rotating boom, and the nut of the first electric push rod is installed on the machine head base.

2. A specialized milling and drilling machine tool with a rotary device according to claim 1, characterized in that: The vertical sliding device of the machine head includes one or more vertical guide rails vertically mounted on the machine head base, and a vertical slider is provided on the housing of the power machine head, which cooperates with the vertical guide rail; the vertical drive device of the machine head is a second electric push rod, the base of the second electric push rod is mounted on the machine head base, and the main shaft motor housing of the second electric push rod is also mounted on the housing.

3. A specialized milling and drilling machine tool with a rotary device according to claim 1, characterized in that: The rotating boom has two horizontal guide rails on each side.

4. A specialized milling and drilling machine tool with a rotary device according to claim 2, characterized in that: There are two vertical guide rails on the machine head base.

5. A specialized milling and drilling machine tool with a rotary device according to claim 1, characterized in that: The telescopic feed drive device is a stepping cylinder.

6. A specialized milling and drilling machine tool with a rotary device according to claim 1, characterized in that: The power head is a high-precision CNC spindle motor.

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