Multi-head numerical control drill

Abstract

The utility model relates to a multi-head numerical control drill, which belongs to the technical field of numerical control drilling machines, and comprises a rack and a workbench, the workbench performs X-axis and Y-axis movement on the rack through an X-axis lead screw transmission mechanism and a Y-axis lead screw transmission mechanism, a support column is arranged on the rack, a support frame is arranged on the support column in a sliding manner, and the support frame is arranged on the rack in a sliding manner. At least two drill bit fixing devices capable of independently ascending and descending are arranged on the supporting frame, and a power source for driving the drill bit fixing devices to rotate is arranged on the supporting frame. And the multiple drill bit fixing devices can be independently lifted up and down, and the multi-head numerical control drill can be used for machining a workpiece for multiple times through one-time clamping.

Description

Technical Field

[0001] The utility model belongs to the technical field of numerical control drilling machines, and particularly refers to a multi-head numerical control drill. Background Technique

[0002] A drilling machine mainly refers to a machine tool that uses a drill bit to process holes in a workpiece. Usually, the rotation of the drill bit is the main movement, and the axial movement of the drill bit is the feed movement. The structure of the drilling machine is simple, and the machining accuracy is relatively low. It can drill through holes and blind holes. By replacing special tools, it can also perform operations such as reaming, counterboring, boring, or tapping. During the machining process, the workpiece remains stationary while the tool moves. The center of the tool is aligned with the center of the hole, and the tool rotates.

[0003] Currently, the drilling machine devices in use only have one drill bit. When multiple holes need to be drilled on the same straight line of a workpiece, the drill bit needs to drill holes in sequence one by one. Drilling holes one by one results in a long drilling time for the workpiece, which significantly affects the machining efficiency.

[0004] The domestic database discloses a utility model with the application number 202221979772.0 and the patent name of a multi-head combined drilling machine device. It includes a strip plate, a mounting plate, and a workbench. Symmetrically distributed support plates are installed at the upper end of the workbench. A top plate is installed at the upper end of the support plates. Symmetrically distributed positioning rods are installed between the top plate and the workbench. A hydraulic device is installed on the upper end surface of the top plate. The hydraulic rod of the hydraulic device extends below the top plate. The strip plate is installed at the end of the hydraulic rod of the hydraulic device. A size scale line is provided on the front end surface of the strip plate. A movable sleeve block is sleeved on the strip plate. There are a total of eight movable sleeve blocks. Symmetrically distributed fixing rods are installed at the lower end of the movable sleeve block. The mounting plate is installed at the end of the fixing rod. A rotating shaft is rotatably installed at the lower end of the mounting plate. A mounting head is installed at the end of the rotating shaft. A drill bit is installed on the mounting head with a reverse thread. Although the above structure can process multiple holes for a single workpiece or process multiple workpieces simultaneously, its rotating shaft cannot move up and down independently. Thus, when the workpiece needs to be drilled, reamed, or tapped, the drill bit needs to be disassembled, which is time-consuming and laborious. Content of the Utility Model

[0005] The purpose of the utility model is to provide a multi-head numerical control drill with a reasonable and simple structure. Multiple drill bits can be fixed through multiple drill bit fixing devices, and the multiple drill bit fixing devices can move up and down independently. Multiple machining operations can be performed on the workpiece with a single clamping.

[0006] The purpose of the utility model is achieved as follows:

[0007] A multi-head numerical control drill includes a frame and a workbench. The workbench moves along the X-axis and Y-axis on the frame through an X-axis lead screw drive mechanism and a Y-axis lead screw drive mechanism. A support column is provided on the frame, and a support frame is slidably arranged on the support column. At least two drill bit fixing devices that can be individually lifted and lowered are provided on the support frame, and a power source for driving the drill bit fixing devices to rotate is provided on the support frame.

[0008] In the above multi-head numerical control drill, the drill bit fixing device includes a drill bit fixing shaft, a synchronous pulley, a lifting sleeve, and a lifting motor. The lifting sleeve is sleeved outside the drill bit fixing shaft, and a bearing is provided between the lifting sleeve and the drill bit fixing shaft. The lifting motor controls the up and down movement of the lifting sleeve and the drill bit fixing shaft through a lead screw nut structure. A spline shaft is provided at the upper end of the drill bit fixing shaft, and a spline groove for cooperating with the spline shaft is provided in the synchronous pulley. The power source is connected to the synchronous pulley through a synchronous belt.

[0009] In the above multi-head numerical control drill, the synchronous pulley includes a wheel body and a spline sleeve. The wheel body is fixed outside the spline sleeve, and a positioning sleeve is sleeved outside the spline sleeve. A bearing is provided between the positioning sleeve and the spline sleeve.

[0010] In the above multi-head numerical control drill, the wheel body is located at the upper end of the positioning sleeve.

[0011] In the above multi-head numerical control drill, there are three drill bit fixing devices.

[0012] In the above multi-head numerical control drill, the three drill bit fixing devices are arranged side by side.

[0013] In the above multi-head numerical control drill, an activity groove for the up and down movement of the lifting sleeve and the activity of the lead screw nut structure is provided on the support frame.

[0014] In the above multi-head numerical control drill, a dust-proof cover for sealing the activity groove is provided on the support frame.

[0015] In the above multi-head numerical control drill, the power source is a motor, and a driving pulley is provided on the motor shaft of the motor.

[0016] The prominent and beneficial technical effects of the present utility model compared with the prior art are:

[0017] The frame of the utility model is provided with a workbench, which can reciprocate back and forth, left and right through an X-axis lead screw transmission mechanism and a Y-axis lead screw transmission mechanism. Moreover, a support frame is arranged on the support column of the frame, and at least two drill bit fixing devices that can be individually lifted and lowered are arranged on the support frame. Drill bits, reaming bits, taps, etc. can be fixed on the drill bit fixing devices. In this way, a workpiece can be clamped once for processing such as drilling, reaming, and tapping, which can improve the processing accuracy and at the same time has a relatively low manufacturing cost. Brief Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the utility model;

[0019] Figure 2 is a schematic structural diagram of the support frame and the drill bit fixing device of the utility model;

[0020] Figure 3 is a cross-sectional view of the support frame and the drill bit fixing device of the utility model;

[0021] Figure 4 is Figure 3 an enlarged view of part A of

[0022] Figure 5 is an exploded view of the drill bit fixing device of the utility model;

[0023] Figure 6 is a schematic structural diagram of the synchronous pulley and the positioning sleeve of the utility model.

[0024] The meanings represented by the reference numerals in the drawings:

[0025] 1 - frame; 2 - workbench; 3 - X-axis lead screw transmission mechanism; 4 - Y-axis lead screw transmission mechanism; 5 - support column;

[0026] 6 - support frame; 7 - drill bit fixing device; 8 - power source; 61 - movable groove; 62 - dust cover;

[0027] 71 - drill bit fixing shaft; 73 - synchronous pulley; 74 - lifting sleeve; 75 - lifting motor; 76 - spline shaft; 77 - spline groove; 81 - driving pulley; 731 - wheel body; 732 - spline sleeve; 733 - positioning sleeve. Detailed Description of the Preferred Embodiments

[0028] The following are specific embodiments of the utility model in combination with the drawings, and the technical solutions of the utility model will be further described, but the utility model is not limited to these embodiments.

[0029] Such as Figures 1-6As shown: A multi-head CNC drill includes a frame 1 and a workbench 2. The workbench 2 moves in the X-axis and Y-axis directions on the frame 1 through an X-axis lead screw drive mechanism 3 and a Y-axis lead screw drive mechanism 4. A support column 5 is provided on the frame 1. A support frame 6 is slidably provided on the support column 5. At least two separately liftable drill bit fixing devices 7 are provided on the support frame 6. A power source 8 for driving the drill bit fixing devices 7 to rotate is provided on the support frame 6. A workbench is provided on the frame. The workbench can reciprocate back and forth, left and right through the X-axis lead screw drive mechanism and the Y-axis lead screw drive mechanism. A support frame is provided on the support column of the frame. At least two drill bit fixing devices that can be separately lifted and lowered are provided on the support frame. Drill bits, reamers, taps, etc. can be fixed on the drill bit fixing devices. In this way, drilling, reaming, tapping and other processes can be carried out with a single workpiece clamping, which can improve the machining accuracy. Multiple drill bit fixing devices are driven to rotate by one power source, and the manufacturing cost is relatively low.

[0030] In the above multi-head CNC drill, the drill bit fixing device 7 includes a drill bit fixing shaft 71, a synchronous pulley 73, a lifting sleeve 74 and a lifting motor 75. The lifting sleeve 74 is sleeved outside the drill bit fixing shaft 71, and a bearing is provided between the lifting sleeve 74 and the drill bit fixing shaft 71. The lifting motor 75 controls the up and down movement of the lifting sleeve 74 and the drill bit fixing shaft 71 through a lead screw nut structure. A spline shaft 76 is provided at the upper end of the drill bit fixing shaft 71. A spline groove 77 for cooperating with the spline shaft 76 is provided in the synchronous pulley 73. The power source 8 is connected to the synchronous pulley 73 through a synchronous belt 78. Specifically, the lifting motor is a servo motor. The lead screw is fixed on the motor shaft of the servo motor, and the nut is fixedly connected to the lifting sleeve through a connecting plate. Using a servo motor can improve the lifting accuracy of the drill bit fixing shaft. The upper end of the drill bit fixing shaft extends out of the synchronous pulley. When the drill bit fixing shaft moves downward, at least part of the spline shaft is connected to the synchronous pulley. In this way, the rotation of the synchronous pulley can also drive the drill bit fixing shaft to rotate.

[0031] In the above multi-head CNC drill, the synchronous pulley 73 includes a wheel body 731 and a spline sleeve 732. The wheel body 731 is fixed outside the spline sleeve 732, and a positioning sleeve 733 is sleeved outside the spline sleeve 732. A bearing is provided between the positioning sleeve 733 and the spline sleeve 732. Specifically, this is to lengthen the cooperation length between the spline shaft and the spline sleeve to ensure power transmission.

[0032] In the above multi-head CNC drill, the wheel body 731 is located at the upper end of the positioning sleeve 733. Specifically, this is to facilitate the cooperation between the synchronous belt and the wheel body.

[0033] In the above multi-head numerical control drill, there are three drill bit fixing devices 7, and the three drill bit fixing devices 7 are arranged side by side. Specifically, this is to ensure the machining accuracy of the workpiece.

[0034] In the above multi-head numerical control drill, the support frame 6 is provided with an activity groove 61 for the lifting sleeve 74 to move up and down and for the screw-nut structure to move. Specifically, there are three activity grooves.

[0035] In the above multi-head numerical control drill, the support frame 6 is provided with a dust cover 62 for sealing the activity groove 61. Specifically, this is to prevent dust from entering the activity groove and causing wear to the screw-nut structure.

[0036] In the above multi-head numerical control drill, the power source 8 is a motor, and a driving pulley 81 is arranged on the motor shaft of the motor. Specifically, the designed driving pulley is for cooperating with the synchronous pulley and the synchronous belt, and the motor is also a servo motor.

[0037] The above embodiments are only the preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A multi-head numerically controlled drill, comprising a frame (1) and a workbench (2), characterized in that: The workbench (2) moves in the X-axis and Y-axis directions on the frame (1) through the X-axis lead screw drive mechanism (3) and the Y-axis lead screw drive mechanism (4). A support column (5) is provided on the frame (1), and a support frame (6) is slidably arranged on the support column (5). At least two drill bit fixing devices (7) that can be individually lifted and lowered are provided on the support frame (6), and a power source (8) for driving the drill bit fixing device (7) to rotate is provided on the support frame (6).

2. The multi-head CNC drill according to claim 1, wherein: The drill bit fixing device (7) includes a drill bit fixing shaft (71), a synchronous pulley (73), a lifting sleeve (74), and a lifting motor (75). The lifting sleeve (74) is sleeved outside the drill bit fixing shaft (71), and a bearing is provided between the lifting sleeve (74) and the drill bit fixing shaft (71). The lifting motor (75) controls the up and down movement of the lifting sleeve (74) and the drill bit fixing shaft (71) through a lead screw nut structure. A spline shaft (76) is provided at the upper end of the drill bit fixing shaft (71). A spline groove (77) for cooperating with the spline shaft (76) is provided inside the synchronous pulley (73). The power source (8) is connected to the synchronous pulley (73) through a synchronous belt (78).

3. The multi-head numerical control drill according to claim 2, characterized in that: The synchronous pulley (73) includes a wheel body (731) and a spline sleeve (732). The wheel body (731) is fixed outside the spline sleeve (732), and a positioning sleeve (733) is sleeved outside the spline sleeve (732). A bearing is provided between the positioning sleeve (733) and the spline sleeve (732).

4. The multi-head CNC drill according to claim 3, wherein: The wheel body (731) is located at the upper end of the positioning sleeve (733).

5. The multi-head CNC drill according to claim 1 or 2 or 3 or 4, characterized in that: There are three drill bit fixing devices (7).

6. The multi-head numerically controlled drill according to claim 5, wherein: The three drill bit fixing devices (7) are arranged side by side.

7. The multi-head numerically controlled drill according to claim 2, characterized in that: An activity groove (61) for the up and down movement of the lifting sleeve (74) and the activity of the lead screw nut structure is provided on the support frame (6).

8. The multi-head numerically controlled drill according to claim 7, wherein: A dust cover (62) for sealing the activity groove (61) is provided on the support frame (6).

9. The multi-head CNC drill according to claim 5, wherein: The power source (8) is a motor, and a driving pulley (81) is provided on the motor shaft of the motor.

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