A workpiece clamping mechanism on the table of a CNC drilling machine

Abstract

This utility model discloses a workpiece clamping mechanism for a CNC drilling machine table, belonging to the field of mechanical engineering. It includes a rotary platform mechanism, a vise mechanism, a servo motor, zero-point positioners, and a fixture tray mechanism. The rotary platform mechanism includes a fixed base, a locking ring, a bearing, and a rubber oil seal. The bearing is rotatably mounted on the fixed base, and the output shaft of the servo motor is connected to the bearing to drive its rotation. Multiple zero-point positioners are mounted on the upper surface of the bearing. The fixture tray mechanism is detachably locked to the zero-point positioners via its bottom. The vise mechanism is fixedly mounted on the fixture tray mechanism. This utility model enables simultaneous workpiece processing and loading / unloading at different workstations, as well as modular and rapid fixture replacement, shortening non-processing auxiliary time and improving the processing efficiency of the CNC drilling machine.

Description

Technical Field

[0001] This utility model relates to the field of mechanical engineering, and in particular to a workpiece clamping mechanism for a CNC drilling machine table. Background Technology

[0002] CNC drilling machines are high-precision automated machining equipment widely used in modern manufacturing, used for drilling, reaming, and boring of workpieces. Before machining, a workpiece clamping mechanism is needed to securely position and clamp the workpiece on the machine tool table; this is a fundamental prerequisite for ensuring machining accuracy.

[0003] Currently, common workpiece clamping mechanisms on CNC drilling machine tables typically involve directly fixing a vise or special clamp to the machine tool table with bolts. This structure enables effective clamping of a single workpiece.

[0004] However, during operation, once a workpiece is finished, the CNC drilling machine must pause operation, waiting for the operator to manually release and remove the machined workpiece before installing and clamping the new workpiece to be processed. Throughout this entire workpiece loading and unloading process, the CNC equipment is completely idle, and this non-machining auxiliary time significantly extends the production cycle of a single workpiece.

[0005] The cumulative downtime caused by frequent loading and unloading of workpieces severely restricts the actual utilization rate of machine tools and overall production efficiency. Therefore, how to reduce downtime caused by workpiece loading and unloading and improve the overall processing efficiency of CNC drilling machines is a technical problem that urgently needs to be solved in this field.

[0006] Therefore, this utility model proposes a workpiece clamping mechanism for the table of a CNC drilling machine to overcome the shortcomings of the prior art. Utility Model Content

[0007] To overcome the above shortcomings, this utility model provides a workpiece clamping mechanism for a CNC drilling machine table, which aims to improve the problems in the existing single-station clamping method, which results in long downtime and low processing efficiency during workpiece loading and unloading, as well as the cumbersome and time-consuming process of changing fixtures.

[0008] To achieve the above objectives, this utility model provides a workpiece clamping mechanism for a CNC drilling machine table, comprising: a rotary platform mechanism, a vise mechanism, a servo motor, zero-point positioners, and a fixture tray mechanism; the rotary platform mechanism includes a fixed base, a locking ring, a bearing, and a rubber oil seal. The bearing is rotatably mounted on the fixed base, the rubber oil seal is disposed between the fixed base and the bearing, the locking ring is used to fasten the bearing to the rotary shaft, the output shaft of the servo motor is connected to the bearing for driving the rotary platform mechanism to rotate, multiple zero-point positioners are mounted on the upper surface of the bearing, the fixture tray mechanism is detachably locked to the zero-point positioners through its bottom, and the vise mechanism is fixedly mounted on the fixture tray mechanism.

[0009] Preferably, the clamping pallet mechanism includes a base frame consisting of side plates and longitudinal beams, and a pad plate. The pad plate is fixed to the base frame consisting of side plates and longitudinal beams, and the vise mechanism is mounted on the pad plate.

[0010] Preferably, the clamping tray mechanism further includes column feet, which are disposed at the bottom of the base frame.

[0011] Preferably, the vise mechanism includes a base and a fixed vise body, the base is connected to the clamp tray mechanism, and the fixed vise body is integrally set with the base.

[0012] Preferably, the vise mechanism further includes a rotating frame, which is rotatably mounted on the base.

[0013] Preferably, the vise mechanism further includes a movable jaw, a screw, and a handle. The movable jaw is slidably mounted in the fixed jaw, the screw passes through the fixed jaw and is threadedly connected to the movable jaw, and the handle is connected to the end of the screw.

[0014] Preferably, clamping plates are provided on the opposing clamping surfaces of both the fixed clamping body and the movable clamping body.

[0015] Preferably, multiple zero-point positioners are evenly distributed circumferentially on the upper surface of the bearing shaft.

[0016] This utility model has the following beneficial effects: 1. In this utility model, by setting up a rotary platform mechanism driven by a servo motor and integrating multiple workstations on the rotary platform mechanism, each workstation cooperates with a clamping tray mechanism equipped with a vise mechanism through a zero-point locator, which solves the problem in the prior art that workpiece processing and loading / unloading must be carried out sequentially, causing the machine tool to stop and wait, resulting in low overall processing efficiency. It achieves the simultaneous completion of workpiece loading / unloading at other workstations while processing at one workstation, shortening non-processing auxiliary time and improving production efficiency and equipment utilization.

[0017] 2. This utility model solves the problems of cumbersome process, long time consumption and difficulty in guaranteeing repeated positioning accuracy when changing different types of fixtures in the prior art by setting a zero-point positioner on the rotary platform mechanism and enabling the fixture pallet mechanism that carries the vise mechanism to achieve detachable locking and engagement through the zero-point positioner. It achieves the effect of modularization and rapid replacement of fixtures, and can flexibly meet the processing needs of different workpieces.

[0018] 3. This utility model integrates the vise mechanism, the clamping tray mechanism, and the rotating platform mechanism into a whole automated clamping mechanism. The vise mechanism itself also includes a horizontally rotatable rotating frame, which solves the problems of the traditional clamp structure having a single function and difficulty in adjusting the angle after the workpiece is installed. It achieves a compact overall structure and high integration, which not only facilitates the quick change of the entire clamp, but also makes it easy to make precise angle adjustment of the workpiece at a single station, making the operation more convenient and flexible. Attached Figure Description

[0019] Figure 1 This is a perspective view of a workpiece clamping mechanism on the table of a CNC drilling machine proposed in this utility model; Figure 2 This is a schematic diagram of the rotating platform mechanism of a CNC drilling machine table workpiece clamping mechanism proposed in this utility model; Figure 3 This is a schematic diagram of a vise mechanism for a workpiece clamping mechanism on a CNC drilling machine table, as proposed in this utility model. Figure 4 This is a schematic diagram of the clamping tray mechanism of a CNC drilling machine table workpiece clamping mechanism proposed in this utility model; Legend: 1. Rotating platform mechanism; 101. Fixed base; 102. Locking ring; 103. Bearing; 104. Rubber oil seal; 2. Vise mechanism; 201. Base; 202. Fixed clamp body; 203. Rotating frame; 204. Movable clamp body; 205. Screw; 206. Clamping plate; 207. Handle; 3. Servo motor; 4. Zero point positioner; 5. Fixture pallet mechanism; 501. Side plate; 502. Longitudinal beam; 503. Pad; 504. Column foot. Detailed Implementation

[0020] 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.

[0021] Reference Figures 1-4This utility model provides a workpiece clamping mechanism for a CNC drilling machine table, which aims to solve the problems in the prior art of long machine downtime and low processing efficiency caused by workpiece loading and unloading, as well as the cumbersome and time-consuming process of changing different types of fixtures.

[0022] Specifically, it includes a rotary platform mechanism 1, a vise mechanism 2, a servo motor 3, a zero-point positioner 4, and a fixture tray mechanism 5. The rotary platform mechanism 1 serves as the basis for the installation and movement of the entire device. The servo motor 3 provides power for the rotation of the rotary platform mechanism 1. The zero-point positioner 4 is installed on the rotary platform mechanism 1 and is used to achieve rapid positioning and locking with the fixture tray mechanism 5. The fixture tray mechanism 5 serves as a bearing platform, and the vise mechanism 2 is installed on the fixture tray mechanism 5 to directly clamp the workpiece.

[0023] The rotary platform mechanism 1 includes a fixed base 101, a locking ring 102, a bearing 103, and a rubber oil seal 104. The fixed base 101 is used to stably install the entire mechanism on the table of the CNC drilling machine. The bearing 103 is rotatably mounted on the fixed base 101. A rubber oil seal 104 is provided at the rotational engagement point between the fixed base 101 and the bearing 103 to achieve dust prevention and sealing, and to protect internal bearings and other transmission components. The output shaft of the servo motor 3 is connected to the bearing 103 for transmission, and is used to precisely drive the bearing 103 to rotate to the predetermined processing position or material changing position. The locking ring 102 is used to fasten the bearing 103 and the output shaft of the servo motor 3 to ensure the reliability of power transmission and zero backlash.

[0024] To achieve rapid fixture changeover and high-precision positioning, multiple zero-point positioners 4 are fixedly installed on the upper surface of the bearing 103. These zero-point positioners 4 are evenly distributed circumferentially on the upper surface of the bearing 103, ensuring not only balanced load distribution after the fixture tray mechanism 5 is installed, but also precise equidistant positioning during multi-station machining. The fixture tray mechanism 5, as an independent unit for carrying the workpiece and the fixture, is detachably locked to the zero-point positioner 4 on the rotary platform mechanism 1 through the positioning hole at its bottom. This allows the entire fixture tray mechanism 5, together with the vise mechanism 2 and the workpiece mounted on it, to be quickly loaded or unloaded from the rotary platform mechanism 1 as a whole. This enables the next workpiece to be clamped on another spare fixture tray while the machine tool is processing the current workpiece, thus shortening the downtime for changing materials.

[0025] In a preferred embodiment, the clamping pallet mechanism 5 includes a base frame consisting of a side plate 501 and a longitudinal beam 502 welded or screwed together, and a pad 503 fixed to the upper surface of the base frame. The base frame provides sufficient structural rigidity and stability for the entire pallet. The vise mechanism 2 is directly fixedly installed on the pad 503. To further facilitate its placement and operation in offline mode, the clamping pallet mechanism 5 also includes a column foot 504 fixedly connected to the bottom of the aforementioned base frame, which provides stable four-point or multi-point support for the clamping pallet mechanism 5 when it is detached from the rotating platform mechanism 1.

[0026] The vise mechanism 2 is used to directly clamp the workpiece. It includes a base 201 and a fixed clamp body 202 integrally formed with the base 201. The base 201 is fixedly connected to the pad 503 of the clamping tray mechanism 5 by bolts or other means. In order to improve the processing flexibility, the vise mechanism 2 also includes a rotating frame 203. The rotating frame 203 is rotatably set on the base 201 to adjust the clamping angle of the entire vise mechanism 2 in the horizontal plane, thereby facilitating drilling or milling of the workpiece at multiple angles.

[0027] The clamping action of the vise mechanism 2 is achieved through the cooperation of the movable jaw 204, the screw 205, and the handle 207. The movable jaw 204 is slidably installed in the guide rail of the fixed jaw 202. One end of the screw 205 passes through the end wall of the fixed jaw 202 and is threadedly connected to the movable jaw 204. The other end, i.e., the end of the screw 205, is connected to the handle 207. The operator drives the screw 205 to rotate by turning the handle 207, which in turn drives the movable jaw 204 to move along the guide rail direction through the threaded transmission, thereby clamping or releasing the workpiece. Replaceable clamping plates 206 are provided on the opposing clamping surfaces of the fixed jaw 202 and the movable jaw 204, which can adapt to different workpiece materials or shapes and extend their service life.

[0028] Working principle: When the workpiece in the processing area is finished, the servo motor 3 starts and its power drives the bearing 103 of the rotating platform mechanism 1 to rotate at a precise angle through the transmission connection. As the bearing 103 rotates, the loading and unloading workstation that has been clamped with the new workpiece will rotate into the processing area, while the workstation that was originally in the processing area will rotate out to the safe loading and unloading area.

[0029] During the rotational positioning process, the zero-point locator 4 installed on the bearing 103 and the corresponding structure at the bottom of the fixture tray mechanism 5 achieve rapid and high-precision locking and positioning, ensuring that the position of the workpiece newly entering the processing area is accurate and that a new processing cycle can be started directly. The entire station switching process is automated and takes very little time. The machine tool does not need to stop for a long time. Through the synergistic effect of the rotary platform mechanism 1, the zero-point locator 4 and the fixture tray mechanism 5, the problems of equipment idleness and low efficiency caused by workpiece loading and unloading in the prior art are solved.

Claims

1. A workpiece clamping mechanism for a CNC drill bed table, comprising: A rotating platform mechanism (1) is characterized in that the rotating platform mechanism (1) includes a fixed base (101), a locking ring (102), a bearing (103), and a rubber oil seal (104). The bearing (103) is rotatably mounted on the fixed base (101). The rubber oil seal (104) is disposed between the fixed base (101) and the bearing (103). The locking ring (102) is used to fasten the bearing (103) to the rotating shaft. A servo motor (3) is provided, and the output shaft of the servo motor (3) is connected to the bearing (103) for driving the rotating platform mechanism (1) to rotate. Zero point positioner (4), a plurality of the zero point positioners (4) are mounted on the upper surface of the bearing (103); The clamping tray mechanism (5) is detachably locked to the zero-point locator (4) via its bottom; The vise mechanism (2) is fixedly installed on the clamp tray mechanism (5).

2. The numerically controlled drilling machine table workpiece clamping mechanism according to claim 1, characterized by, The clamping pallet mechanism (5) includes a base frame consisting of a side plate (501) and a longitudinal beam (502) and a pad (503). The pad (503) is fixed on the base frame consisting of the side plate (501) and the longitudinal beam (502), and the vise mechanism (2) is installed on the pad (503).

3. The numerically controlled drilling machine table workpiece clamping mechanism according to claim 2, characterized by, The clamping tray mechanism (5) also includes a column base (504) which is located at the bottom of the base frame.

4. The numerically controlled drilling machine table workpiece clamping mechanism according to claim 1, characterized by, The vise mechanism (2) includes a base (201) and a fixed vise body (202). The base (201) is connected to the clamp tray mechanism (5), and the fixed vise body (202) is integrally formed with the base (201).

5. The numerically controlled drilling machine table workpiece clamping mechanism according to claim 4, characterized in that, The vise mechanism (2) also includes a rotating frame (203), which is rotatably mounted on the base (201).

6. The numerically controlled drilling machine table workpiece clamping mechanism according to claim 4, wherein, The vise mechanism (2) further includes a movable vise body (204), a screw (205) and a handle (207). The movable vise body (204) is slidably installed in the fixed vise body (202). The screw (205) passes through the fixed vise body (202) and is threadedly connected to the movable vise body (204). The handle (207) is connected to the end of the screw (205).

7. The numerically controlled drilling machine table workpiece clamping mechanism according to claim 6, characterized by, Clamping pieces (206) are provided on the opposing clamping surfaces of the fixed clamping body (202) and the movable clamping body (204).

8. The workpiece clamping mechanism on the CNC drilling machine table according to claim 1, characterized in that, The plurality of zero-point locators (4) disposed on the upper surface of the bearing (103) are evenly distributed along its circumference.

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