Automatic feeding mechanism of CNC machining center

Abstract

The utility model provides an automatic feeding mechanism of a CNC machining center, and belongs to the technical field of numerical control machining equipment. Comprising a machining center body, a workbench is arranged in a working chamber in the machining center body in a lifting mode, a clamping assembly used for fixing workpieces is arranged on a machining platform, and a feeding conveyor and a discharging conveyor are arranged on the side, close to a first opening, of the workbench in parallel at intervals; workpieces are conveyed into a working chamber of the machining center body through the feeding conveyor, the workpieces on the feeding conveyor are pushed to the workbench through the pushing assembly, the workpieces are clamped and positioned through the clamping assembly, the workbench is lifted to be not lower than the height of the discharging conveyor, then the workpieces can be machined, and after the workpieces are machined, the workpieces are conveyed to the machining center body through the discharging conveyor. And the material pushing assembly pushes the workpieces to the discharging conveyor to be conveyed out of the working chamber, and the effect of improving the workpiece machining efficiency is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control processing equipment, in particular to an automatic feeding mechanism for a CNC processing center. Background Art

[0002] Generally, CNC machining refers to computer digital controlled precision machining, CNC machining lathes, CNC machining milling machines, CNC machining boring and milling machines, etc. CNC machining center is an automated machining equipment that integrates automatic machining and automatic tool changing.

[0003] At present, some CNC machining centers with automatic feeding functions usually use robots to clamp the workpiece to be processed, clamp the workpiece from the entrance of the machining center to the machining table, and then clamp the workpiece out of the machining center after the machining is completed.

[0004] However, robots are expensive and their control procedures are complex, so most processing manufacturers cannot afford the cost. Manual feeding and unloading of workpieces is still the mainstream of the market, which requires a lot of manpower and has a low degree of automation. Utility Model Content

[0005] In view of the above problems, the utility model provides an automatic feeding mechanism for a CNC machining center.

[0006] In order to achieve the above-mentioned invention object, the technical solution adopted by the utility model is as follows:

[0007] Provided is an automatic feeding mechanism for a CNC machining center, comprising a machining center body, a working room provided in the machining center body, a machining platform provided in the working room, and a first opening provided on the machining center body that is connected to the working room and allows workpieces to enter or exit;

[0008] A workbench is arranged for lifting in the working room, a processing platform is arranged on the top wall of the workbench, a clamping assembly for fixing the workpiece is arranged on the processing platform, a first driving member for driving the workbench to vertically lift and lower is arranged in the main body of the machining center, a feeding conveyor and a discharging conveyor are arranged parallel to and at intervals on one side of the workbench close to the first opening, and a pushing assembly for feeding the workpiece on the feeding conveyor onto the workbench and feeding the workpiece on the workbench into the discharging conveyor is arranged in the main body of the machining center.

[0009] Furthermore, the clamping assembly includes two groups of downward-pressing cylinder assemblies slidably arranged on the workbench along the width direction of the feeding conveyor, the two groups of downward-pressing cylinder assemblies are located on both sides of the feeding conveyor and are mirrored to each other, the downward-pressing cylinder assembly includes a first slider slidably arranged on the workbench, a downward-pressing cylinder is fixedly arranged on the first slider, a positioning rod is fixedly arranged on the piston rod of the downward-pressing cylinder, a pressure block extending horizontally to the middle of the workbench is provided on the top of the positioning rod, and a first driving cylinder for driving the first slider to move is provided on the workbench.

[0010] Furthermore, a plurality of mounting holes are arranged in an array on the workbench, ball bearings are arranged in the mounting holes, and elastic members are arranged in the mounting holes for driving the ball bearings to move upward and extend out of the top wall of the workbench.

[0011] Furthermore, the first driving member is a first piston cylinder, which is arranged in the main body of the machining center, and the piston rod of the first piston cylinder is connected to the workbench.

[0012] Furthermore, both the feeding conveyor and the discharging conveyor are roller conveyors.

[0013] Furthermore, the pusher assembly includes a mounting frame slidably arranged in the main body of the machining center along the conveying direction of the conveyor, and a first pusher plate and a second pusher plate are slidably arranged on the mounting frame along the width direction of the conveyor. The first pusher plate and the second pusher plate are respectively located above the feeding conveyor and the discharging conveyor.

[0014] The mounting frame is provided with a guide hole for the first push plate and the second push plate to pass through and guide, and the first push plate and the second push plate are both provided with racks along their own sliding directions. The mounting frame is provided with a first drive motor and a second drive motor, and the first drive motor and the second drive motor are respectively connected to the first push plate and the second push plate gear transmission;

[0015] A screw rod is arranged inside the machining center body along the sliding direction of the mounting frame. Both ends of the screw rod are rotatably connected to the machining center body. A threaded sleeve is fixedly arranged on the mounting frame. The screw rod is threadedly connected in the threaded sleeve. A third driving motor for driving the screw rod to rotate is arranged inside the machining center body.

[0016] The beneficial effects of the utility model are as follows: after the staff places the workpiece to be processed on the feeding conveyor, the feeding conveyor is driven to send the workpiece to the working room of the main body of the machining center, the pushing component pushes the workpiece on the feeding conveyor onto the workbench, and the clamping component clamps and positions the workpiece, and the workbench is raised to a height not lower than the discharge conveyor, and then the workpiece can be processed. After the workpiece is processed, the pushing component pushes the workpiece to the discharge conveyor to send it out of the working room, realizing the automatic feeding and discharging operations of the CNC machining center, improving the automation of the equipment, and improving the workpiece processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the CNC machining center of an embodiment of the present application.

[0018] Figure 2 This is a schematic diagram of the overall structure of the automatic feeding mechanism of the CNC machining center according to an embodiment of the present application.

[0019] Figure 3 for Figure 2 A partial enlarged schematic diagram of part A.

[0020] Among them, 1. machining center body; 11. first opening; 12. first piston cylinder; 2. workbench; 21. mounting hole; 22. ball bearing; 3. clamping assembly; 31. first slider; 32. pressing cylinder; 33. positioning rod; 34. pressure block; 35. first driving cylinder; 4. feeding conveyor; 5. discharging conveyor; 6. pushing assembly; 61. mounting frame; 62. first pushing plate; 63. second pushing plate; 64. rack; 65. first driving motor; 66. second driving motor; 67. screw; 68. third driving motor. DETAILED DESCRIPTION

[0021] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] The present application embodiment discloses an automatic feeding mechanism for a CNC machining center, referring to Figure 1 and Figure 2 , including a machining center body 1, the machining center body 1 is composed of an external protective shell and a CNC machining machine, a studio for accommodating the CNC machining machine is provided inside the protective shell, and a machining platform for placing and machining the workpiece to be processed is provided in the studio. A first opening 11 for the workpiece to enter / exit the studio is provided on the protective shell of the machining center body 1. A workbench 2 is installed in the studio for lifting, and the top of the workbench 2 is set as a machining platform. A first driving member for driving the workbench 2 to lift vertically is provided in the machining center body 1, and a clamping assembly 3 for fixing the workpiece is provided on the machining platform. A feeding conveyor 4 and a discharging conveyor 5 are horizontally provided on one side of the workbench 2 close to the first opening 11, and the feeding conveyor 4 and the discharging conveyor 5 are arranged at intervals in the vertical direction. A pushing assembly 6 for feeding the workpiece on the feeding conveyor 4 onto the workbench 2 and feeding the workpiece on the workbench 2 onto the discharging conveyor 5 is also provided in the machining center body 1.

[0023] After the staff places the workpiece to be processed on the feeding conveyor 4, the workpiece is sent to the working room by the feeding conveyor 4, and then the pusher assembly 6 pushes the workpiece to the workbench 2 and clamps the workpiece. The first driving member lifts the workbench 2 and the workpiece, and then the CNC processing machine tool in the main body 1 of the machining center processes the workpiece. After the workpiece is processed, the workpiece on the workbench 2 is released, and then the pusher assembly 6 pushes the workpiece to the discharge conveyor 5, completing the feeding and discharging process of the workpiece in the automatic CNC processing process, thereby improving the CNC processing efficiency.

[0024] In the embodiment of the present application, both the feed conveyor 4 and the discharge conveyor 5 are roller conveyors, that is, through sprocket and chain transmission, a single motor drives multiple parallel and spaced rollers to rotate synchronously in the same direction. The use of roller conveyors allows the feed conveyor 4 and the discharge conveyor 5 located in the studio to freely pass through the two conveyors to fall down when debris generated by the workpiece is dropped. In the gas embodiment, the feed conveyor 4 and the discharge conveyor 5 can also be a belt conveyor or a chain plate conveyor.

[0025] Reference Figure 3 Specifically, the clamping assembly 3 on the workbench 2 includes two groups of pressing cylinder 32 assemblies slidably arranged along the width direction of the feeding conveyor 4. The two groups of pressing cylinder 32 assemblies are located on both sides of the feeding conveyor 4 on the workbench 2 and are mirrored to each other. The pressing cylinder 32 assembly includes a first slider 31 slidably mounted on the workbench 2, and the sliding direction of the first slider 31 is parallel to the width direction of the feeding conveyor 4. The pressing cylinder 32 is vertically and fixedly mounted on the first slider 31, and the piston rod head of the pressing cylinder 32 is fixedly connected to a positioning rod 33 protruding from the lower part of the cylinder body of the pressing cylinder 32 toward the middle of the workbench 2. The top end of the positioning rod 33 is also fixedly connected to a pressure block 34 extending horizontally toward the middle of the workbench 2. A first driving cylinder 35 for driving the first slider 31 to move is fixedly mounted on the edge of the workbench 2.

[0026] When the workpiece is pushed onto the workbench 2, the piston rod of the first driving cylinder 35 extends to push the first sliders 31 on both sides of the workbench 2 and the pressing cylinder 32 toward the middle of the workbench 2, so that the positioning rod 33 contacts the outside of the workpiece, and then the pressing cylinder 32 is started to drive the positioning rod 33 and the pressing block 34 to move downward, and the pressing block 34 presses the upper surface of the workpiece, thereby achieving the purpose of positioning and fixing the workpiece on the workbench 2. After the workpiece is moved to the workbench 2 and fixed, the CNC processing machine automatically performs tool setting and processing operations on the workpiece.

[0027] Furthermore, in one set of the pressing cylinder 32 assembly, multiple sets of the first slider 31, the first driving cylinder 35 and the pressing cylinder 32 can be arranged to improve the positioning and pressing stability of the workpiece. At the same time, a pressure-type travel switch can be arranged on the side of the positioning rod 33 close to the middle of the workbench 2 and the bottom surface of the pressing block 34, which are respectively connected to the first driving cylinder 35 and the pressing cylinder 32 by telecommunication, and are used to control the first driving cylinder 35 and the pressing cylinder 32 to stop when the positioning rod 33 and the pressing block 34 contact the side and top surface of the workpiece.

[0028] The first driving member for driving the workbench 2 to vertically lift can be a first piston cylinder 12, the cylinder body of the first piston cylinder 12 is fixedly installed in the main body of the processing center by bolts, and the piston rod of the first piston cylinder 12 is connected to the bottom wall of the workbench 2. Between the workbench 2 and the main body 1 of the processing center, guide columns, sliding guide rails, etc. can also be used to play a linear guiding role in the lifting process of the workbench 2.

[0029] Furthermore, an auxiliary support rod can be arranged in the working room of the machining center body 1. The auxiliary support rod is driven to slide horizontally through the cooperation of the motor, gear and rack 64. A plurality of auxiliary support rods are arranged at evenly spaced intervals along the circumference of the workbench 2. After the first piston cylinder 12 lifts the workbench 2, the auxiliary support rod is just located under the workbench 2. The auxiliary support rod is driven to extend directly under the workbench 2 and fit against the bottom wall of the workbench 2, which can provide auxiliary support for the workbench 2 and keep the workbench 2 stable during the machining of the workpiece.

[0030] The push assembly 6 includes a mounting frame 61 installed in the machining center body 1 through a track sliding along the conveying direction of the conveyor, and a first push plate 62 and a second push plate 63 are slidably arranged on the mounting frame 61 along the width direction of the conveyor. The first push plate 62 and the second push plate 63 are respectively located above the feeding conveyor 4 and the discharging conveyor 5, and the first push plate 62 and the second push plate 63 are spaced apart on the mounting frame 61 along the feeding direction of the feeding conveyor 4. The mounting frame 61 is provided with a guide hole for the first push plate 62 and the second push plate 63 to pass through and guide, and the first push plate 62 and the second push plate 63 are both provided with a rack 64 along their own sliding direction, and a first drive motor 65 and a second drive motor 66 are installed on the mounting frame 61, and the first drive motor 65 and the second drive motor 66 are respectively connected to the first push plate 62 and the second push plate 63 through gear transmission.

[0031] A screw rod 67 is provided in the machining center body 1 along the sliding direction of the mounting frame 61, and both ends of the screw rod 67 are rotatably connected to the machining center body 1. A threaded sleeve is fixedly provided on the mounting frame 61, and the screw rod 67 is threadedly connected in the threaded sleeve. A third driving motor 68 for driving the screw rod 67 to rotate is provided in the machining center body 1. The first driving motor 65 and the second driving motor 66 drive the first push plate 62 and the second push plate 63 to move in and out from above the feed conveyor 4 and the discharge conveyor 5, respectively, so that when the workpiece is fed to the workbench 2, the first push plate 62 is located on the feed conveyor 4 and extends into the feed conveyor 4 in the rear of the workpiece feeding direction, and then the third driving motor 68 drives the mounting frame 61 to move into the working room, and the workpiece is fed onto the workbench 2 to complete the workpiece loading. When the workpiece is unloaded, the mounting frame 61 moves to the top of the workbench 2 in the working chamber, the second push plate 63 extends into the top of the workbench 2, and then the mounting frame 61 moves to the discharge conveyor 5, thereby pushing the workpiece from the workbench 2 to the discharge conveyor 5.

[0032] Furthermore, in order to make the workpiece move smoothly on the workbench 2, in the embodiment of the present application, a plurality of mounting holes 21 are arranged in an array on the workbench 2, and a ball bearing 22 is arranged in the mounting hole 21, and an elastic member for driving the ball bearing 22 to move upward and extend out of the top wall of the workbench 2 is arranged in the mounting hole 21. The ball bearing 22 includes a bearing seat vertically slidably mounted in the mounting hole 21 and a ball rollingly mounted on the top of the bearing seat. The elastic member is a spring, one end of the spring abuts against the inner bottom wall of the mounting hole 21, and the other end abuts against the bottom wall of the bearing seat. Before the clamping assembly 3 is pressed against the workpiece, the spring drives the bearing seat to rise, so that the ball protrudes from the top wall of the workbench 2. When the workpiece moves on the workbench 2, it rolls and contacts with the ball, reducing the friction between the workpiece and the workbench 2, so that the workpiece moves smoothly. When the clamping assembly 3 presses the workpiece, the spring elastic force is overcome, and the ball bearing 22 is pressed into the mounting hole 21, so that the workpiece is stably installed on the workbench 2.

[0033] It should be understood by those skilled in the art that, although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An automatic feeding mechanism for a CNC machining center, comprising a machining center body, a working room provided in the machining center body, a machining platform provided in the working room, a first opening connected to the working room and for the workpiece to enter / exit is provided on the machining center body, characterized in that: A workbench is arranged in the working chamber for lifting and lowering, the processing platform is arranged on the top wall of the workbench, a clamping assembly for fixing the workpiece is arranged on the processing platform, a first driving member for driving the workbench to vertically lift and lower is arranged in the main body of the machining center, a feeding conveyor and a discharging conveyor are arranged parallel to and at intervals on one side of the workbench close to the first opening, and a pushing assembly for feeding the workpiece on the feeding conveyor onto the workbench and feeding the workpiece on the workbench onto the discharging conveyor is arranged in the main body of the machining center.

2. The automatic feeding mechanism of a CNC machining center according to claim 1, characterized in that: The clamping assembly includes two groups of downward-pressing cylinder assemblies slidably arranged on the workbench along the width direction of the feeding conveyor, the two groups of downward-pressing cylinder assemblies are located on both sides of the feeding conveyor and are mirror-imaged to each other, the downward-pressing cylinder assembly includes a first slider slidably arranged on the workbench, a downward-pressing cylinder is fixedly arranged on the first slider, a positioning rod is fixedly arranged on the piston rod of the downward-pressing cylinder, a pressure block extending horizontally toward the middle of the workbench is provided on the top of the positioning rod, and a first driving cylinder for driving the first slider to move is provided on the workbench.

3. The automatic feeding mechanism of a CNC machining center according to claim 2, characterized in that: The workbench is provided with a plurality of mounting holes in an array, wherein ball bearings are arranged in the mounting holes, and wherein elastic members for driving the ball bearings to move upward and extend out of the top wall of the workbench are arranged in the mounting holes.

4. The automatic feeding mechanism of a CNC machining center according to claim 1, characterized in that: The first driving member is a first piston cylinder, which is arranged in the main body of the machining center, and a piston rod of the first piston cylinder is connected to the workbench.

5. The automatic feeding mechanism of a CNC machining center according to claim 4, characterized in that: The feeding conveyor and the discharging conveyor both adopt roller conveyors.

6. An automatic feeding mechanism for a CNC machining center according to any one of claims 1 to 5, characterized in that: The pusher assembly includes a mounting frame slidably arranged in the main body of the machining center along the conveying direction of the conveyor, and a first pusher plate and a second pusher plate are slidably arranged on the mounting frame along the width direction of the conveyor, and the first pusher plate and the second pusher plate are respectively located above the feeding conveyor and the discharging conveyor. The mounting frame is provided with a guide hole for the first push plate and the second push plate to pass through and guide, and the first push plate and the second push plate are both provided with racks along their own sliding directions. The mounting frame is installed with a first drive motor and a second drive motor, and the first drive motor and the second drive motor are respectively connected to the first push plate and the second push plate gear transmission; A screw rod is arranged inside the machining center body along the sliding direction of the mounting frame, and both ends of the screw rod are rotatably connected to the machining center body. A threaded sleeve is fixedly arranged on the mounting frame, and the screw rod is threadedly connected in the threaded sleeve. A third driving motor for driving the screw rod to rotate is arranged inside the machining center body.

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