A dual-drilling processing device

Abstract

This utility model provides a dual-drilling machining device, belonging to the field of production technology. It includes: a spindle, rotatable about its own axis, used to clamp and rotate workpieces; a top clamp, coaxially arranged with the spindle and movable along the spindle's axial direction to approach or move away from it, the end face of the top clamp facing the spindle being used to abut against the workpiece; a centering drill bit, its axis perpendicular to the spindle's axis, used to machine centering holes on the outer circumferential surface of the workpiece; and two drilling bits, spaced apart around the spindle's axis, each drilling bit's axis perpendicular to the spindle's axis. The advantage is that both drilling bits feed simultaneously, completing the machining of two holes in a single clamping operation. Compared to machining one hole at a time with a single drill bit, the machining cycle time is significantly shortened, and production efficiency is greatly improved. Furthermore, the centering and drilling processes are integrated into the same device, and the spindle only needs to rotate for indexing to switch positions.

Description

Technical Field

[0001] This utility model belongs to the field of production technology, and in particular relates to a dual-drilling processing device. Background Technology

[0002] Currently, in the field of machining, CNC drilling machines or machining centers are typically used for drilling radial holes in shaft or tube parts. During machining, the workpiece is clamped on the spindle's clamping mechanism, and the spindle drives the workpiece to rotate and index. The drill bit feeds perpendicular to the workpiece's axis, machining the required radial hole on the workpiece's outer circumference.

[0003] For situations requiring the machining of multiple radial holes along the circumferential direction on the outer periphery of a workpiece, existing machining methods have the following shortcomings: First, in actual production, a "centering first, drilling later" process is often adopted. That is, a centering hole is first machined on the arc surface using a centering drill, and then a drilling bit is used to drill at the position of the centering hole. However, in existing equipment, the centering and drilling processes usually need to be completed step by step on different machine tools, requiring multiple clamping and transfer of the workpiece. This not only increases non-machining time but also causes inconsistencies in clamping datum due to multiple clamping, thus affecting the indexing accuracy of each hole on the circumference. Second, most existing drilling equipment uses a single-drill-bit machining method, that is, only one hole is machined at a time. After machining one hole, the spindle rotates to index before machining the next hole. For radial holes that need to be machined in pairs (such as symmetrical holes), the single-drill-bit machining method is inefficient, has a long machining cycle, and is difficult to meet the requirements of mass production. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a drilling device with high processing efficiency.

[0005] The objective of this utility model can be achieved through the following technical solution: a dual-drilling processing device, comprising: The spindle, which can rotate around its own axis, is used to clamp the workpiece and drive the workpiece to rotate. The top clamp is coaxially arranged with the main shaft and can move along the axial direction of the main shaft to approach or move away from the main shaft. The end face of the top clamp facing the main shaft is used to abut against the workpiece. A centering drill bit, the axis of which is perpendicular to the axis of the spindle, is used to machine a centering hole on the outer circumferential surface of a workpiece; Two drilling bits are spaced apart around the axis of the main shaft, and the axis of each drilling bit is perpendicular to the axis of the main shaft.

[0006] Preferably, the two drilling bits are symmetrically arranged in the horizontal direction, while the centering bit and the drilling bit are distributed perpendicularly to each other in the radial direction of the spindle.

[0007] Preferably, the end face of the top clamping part is provided with a top clamping recess, the top clamping recess includes an abutment surface, the diameter of the abutment surface is equal to the diameter of the workpiece, and the inner wall of the top clamping recess is conical.

[0008] Preferably, it further includes a housing and a mechanical gripper disposed on the top of the housing; the main shaft and the top clamping part are both disposed in the housing, and the main shaft and the top clamping part can move synchronously along the axial direction of the main shaft; the top of the housing is provided with an access port for the mechanical gripper to extend into.

[0009] Preferably, a sliding door is provided at the inlet, the sliding door being movable in a straight line to open or close the inlet; and the sliding door is configured to close the inlet when the main shaft is in operation.

[0010] Preferably, a base frame is provided at the bottom of the spindle, and a mounting seat is provided on the base frame. Both the spindle and the top clamp are provided on the mounting seat. A vertically penetrating collection cavity is opened on the base frame, and a collection box is provided at the bottom of the base frame. The vertical projection of the collection cavity is located in the collection box.

[0011] Preferably, the bottom wall of the collection box is flat, and there is a drop between the two ends of the collection box along its length.

[0012] Preferably, it further includes a support platform, on which a stacking tray is provided for supporting the workpiece, and the axis of the workpiece on the stacking tray is located in the vertical direction, while the axis of the spindle is located in the horizontal direction. A reversing component is provided on the support platform for vertically reversing the workpiece.

[0013] Preferably, the reversing component includes a reversing bracket fixedly mounted on the bearing platform, a rotating bracket rotatably mounted on the reversing bracket, a fixed gripper mounted on the rotating bracket, and the rotating bracket is capable of driving the workpiece to rotate and switch between a horizontal and a vertical posture.

[0014] Preferably, the material stacking tray has a plurality of positioning holes arranged on it, and each positioning hole has at least one positioning step.

[0015] Compared with existing technologies, the advantages of this invention are as follows: Two drilling bits are fed simultaneously, significantly reducing the processing cycle time compared to processing one bit at a time with a single bit. Furthermore, the centering and drilling processes are integrated into the same device, allowing the spindle to switch positions simply by rotating the indexing axis. Multiple centering holes and drilling operations can be completed in a single workpiece clamping, avoiding inconsistencies in reference standards caused by multiple loading / unloading and clamping operations, effectively ensuring the indexing accuracy of each hole on the circumference. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 yes Figure 1 A diagram illustrating the usage status; Figure 3 yes Figure 1 Internal structure diagram; Figure 4 yes Figure 3 A magnified schematic diagram of the partial structure at point A in the middle; Figure 5 This is a schematic diagram of the three-dimensional structure of the top clamp. Figure 6 This is a three-dimensional structural diagram of the commutator; Figure 7 This is a schematic diagram of the three-dimensional structure of the material stacking tray.

[0017] In the diagram, 100 is the spindle; 101 is the centering drill bit; 102 is the drilling drill bit; 103 is the base frame; 104 is the mounting base; 105 is the collection box; 106 is the chip collection box; 200 is the top clamp; 201 is the top clamp recess; 300 is the housing; 301 is the extension entrance; 302 is the sliding door; 400 is the mechanical gripper; 500 is the bearing platform; 501 is the material stacking tray; 502 is the reversing component; 503 is the reversing bracket; 504 is the rotating bracket; 505 is the fixed gripper; 506 is the limiting backrest; 507 is the positioning hole; and 508 is the positioning step. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0020] like Figures 1-7 As shown, this embodiment provides a dual-drilling processing device, including: The spindle 100 is rotatable about its own axis and has a clamping mechanism (such as a chuck or elastic chuck) at its end for clamping the workpiece and driving the workpiece to rotate about its own axis.

[0021] The top clamp 200, coaxially arranged with the main spindle 100, is capable of moving axially along the main spindle 100 to approach or move away from it. Specifically, the top clamp 200 can be driven axially by a cylinder or a lead screw and nut mechanism. The end face of the top clamp 200 facing the main spindle 100 is used to abut against the end of the workpiece. When the workpiece is clamped on the main spindle 100, the top clamp 200 moves towards the main spindle 100, and its end face abuts against the free end of the workpiece, thereby axially positioning and clamping the workpiece and preventing axial movement of the workpiece during drilling.

[0022] A centering drill bit 101 is arranged perpendicular to the axis of the spindle 100, meaning it is perpendicular to the workpiece's axis. The centering drill bit 101 is mounted on a first feed mechanism, which can drive the centering drill bit 101 to feed or retract along its axis to machine a centering hole on the outer circumferential surface of the workpiece. Two drilling drill bits 102 are spaced apart around the axis of the spindle 100, and the axis of each drilling drill bit 102 is perpendicular to the axis of the spindle 100. The two drilling drill bits 102 are respectively mounted on a second feed mechanism and a third feed mechanism, which can respectively drive the corresponding drilling drill bit 102 to feed or retract along its axis. After the centering drill bit 101 completes the centering hole machining, the spindle 100 rotates the workpiece to a predetermined angle, and then the two drilling drill bits 102 feed simultaneously to perform drilling at the centering hole position.

[0023] In this application, two drilling bits 102 are fed simultaneously, significantly reducing the machining cycle time compared to machining one bit at a time. Furthermore, the centering and drilling processes are integrated into the same device, allowing the spindle 100 to switch positions simply by rotating the indexing axis. Multiple centering holes and drilling operations can be completed in a single workpiece clamping, avoiding inconsistencies in datum values ​​caused by multiple loading / unloading and clamping operations, effectively ensuring the indexing accuracy of each hole on the circumference.

[0024] Preferably, the two drilling bits 102 are symmetrically arranged in the horizontal direction, while the centering drill bit 101 is perpendicularly distributed to the drilling bits 102 in the radial direction of the main shaft 100. Taking the axis of the main shaft 100 as a reference, the two drilling bits 102 are respectively arranged on both sides of the main shaft 100 in the horizontal direction within a radial plane perpendicular to this axis. The centering drill bit 101 is arranged vertically above or below the main shaft 100.

[0025] Two drilling bits 102 are symmetrically arranged in the horizontal direction. When they feed simultaneously to drill the workpiece, the radial cutting forces generated by each bit are equal in magnitude and opposite in direction in the horizontal direction, thus canceling each other out. Figure 5As shown, preferably, the end face of the top clamping portion 200 is provided with a top clamping recess 201. The top clamping recess 201 includes an abutment surface, the diameter of which is equal to the diameter of the workpiece, and the inner wall of the top clamping recess 201 is conical. Specifically, the top clamping recess 201 is a countersunk hole structure formed by recessing inward along the axial direction, with its opening end facing the direction of the main shaft 100. The bottom of the top clamping recess 201 forms an abutment surface for direct contact with the end face of the workpiece.

[0026] When the free end of the workpiece enters the top clamp recess 201, even if there is a certain coaxiality deviation, the tapered inclined surface can guide the end of the workpiece to gradually slide towards the center of the recess, so that the axis of the workpiece automatically coincides with the axis of the top clamp 200, achieving precise centering.

[0027] like Figure 1 , Figure 2 As shown, preferably, the dual-drilling processing apparatus further includes a housing 300 and a mechanical gripper 400 disposed on the top of the housing 300. The spindle 100 and the top clamping part 200 are both disposed within the housing 300, and the spindle 100 and the top clamping part 200 are capable of synchronous movement along the axial direction of the spindle 100. An access port 301 for the mechanical gripper 400 to extend into is provided on the top of the housing 300.

[0028] Specifically, the housing 300 constitutes the enclosed main frame of the device, and its interior forms an installation space to accommodate the spindle 100, the top clamp 200, and various feeding mechanisms. The spindle 100 and the top clamp 200 are mounted together on the same movable base, which slides with the housing 300 via a linear guide rail and is driven by a drive mechanism (such as a lead screw and nut mechanism or a linear motor), so that the spindle 100 and the top clamp 200 maintain a fixed relative position and move synchronously back and forth. The top of the housing 300 has an extension port 301 that extends into the internal space. Mechanical grippers 400 are mounted on the outer side of the top of the housing 300, and their movable ends can extend into the housing 300 through the extension port 301 to perform the operation of gripping or placing workpieces.

[0029] The spindle 100 and the top clamp 200 move synchronously to the position opposite to the extension port 301. This position is the clamping position. At this time, the top clamp 200 can move axially independently relative to the spindle 100 to clamp or release the workpiece, which facilitates the mechanical gripper 400 to load and unload the workpiece. After the spindle 100 and the top clamp 200 clamp the workpiece, they move synchronously to the drilling position. This position is the working position. Then the centering drill bit 101 and the drilling drill bit 102 perform the machining operation.

[0030] The spindle 100 switches between only two positions: clamping position and working position. The position logic is clear, making it easy to achieve precise positioning control through limit switches or sensors.

[0031] Preferably, a sliding door 302 is provided at the inlet 301, which can move in a straight line to open or close the inlet 301; and the sliding door 302 is configured to close the inlet 301 when the spindle 100 is in operation.

[0032] Specifically, the sliding door 302 is installed on the top of the housing 300, located at the access port 301. The sliding door 302 is slidably connected to the housing 300 via a linear guide rail and can be driven by an independent cylinder or motor to perform linear reciprocating motion in the horizontal direction. The position of the sliding door 302 and the spindle 100 are linked through a control system: when the spindle 100 moves to the clamping position, an opening signal is sent to open the sliding door 302; when the spindle 100 moves from the clamping position to the working position, a closing signal is sent to close the sliding door 302. The sliding door 302 only opens briefly during loading and unloading; once the spindle 100 enters the working position, the access port 301 automatically closes, completely enclosing the entire processing area inside the housing 300.

[0033] like Figure 3 As shown, preferably, a base frame 103 is provided at the bottom of the spindle 100, and a mounting base 104 is provided on the base frame 103. Both the spindle 100 and the top clamp 200 are mounted on the mounting base 104. A vertically penetrating collection cavity is provided on the base frame 103, and a collection box 105 is provided at the bottom of the base frame 103. The vertical projection of the collection cavity is located within the collection box 105.

[0034] Specifically, the mounting base 104 is fixed to the upper surface of the base frame 103, and the movable base is mounted on the mounting base 104. The collection box 105 is generally elongated, with a flat bottom wall. However, the collection box 105 is inclined along its length, resulting in a height difference between its two ends in the vertical direction. The chips and cutting fluid falling into the collection box 105 automatically collect towards the lower end under the action of gravity along the inclined bottom wall and enter the chip collection box 106 located at the lower end.

[0035] like Figure 3 As shown, preferably, the device further includes a support platform 500, on which a stacking tray 501 is provided. The stacking tray 501 is used to carry the workpiece, and the axis of the workpiece on the stacking tray 501 is located in the vertical direction, while the axis of the main shaft 100 is located in the horizontal direction. A reversing component 502 is also provided on the support platform 500 for vertical reversing of the workpiece.

[0036] The support platform 500 is located beside the housing 300, serving as the supporting base for the loading and unloading area. The stacking tray 501 is detachably mounted on the support platform 500, on which multiple workpieces are arranged vertically. The reversing component 502 is used to convert the workpieces from a vertical to a horizontal position to adapt to the horizontal clamping direction of the spindle 100.

[0037] like Figure 6 As shown, preferably, the reversing component 502 includes a reversing bracket 503 fixedly mounted on the bearing platform 500, a rotating bracket 504 rotatably mounted on the reversing bracket 503, a fixed gripper 505 mounted on the rotating bracket 504, and the rotating bracket 504 can drive the workpiece to rotate and switch between horizontal and vertical postures.

[0038] Specifically, the reversing bracket 503 is a support component fixed on the bearing platform 500, and its top is rotatably connected to the rotating bracket 504 via a rotating shaft. A fixed gripper 505 is mounted on the rotating bracket 504 for holding workpieces. Initially, the rotating bracket 504 is in the vertical picking position. After the mechanical gripper 400 picks up a workpiece and places it on the fixed gripper 505, the rotating bracket 504 rotates around the rotating shaft to the horizontal unloading position. At this time, the axis of the workpiece is horizontal and aligned with the axis of the main spindle 100. The mechanical gripper 400 then removes the workpiece and loads it into the main spindle 100. The reversing component 502 can integrate a rotary drive element (such as a rotary cylinder or servo motor) to achieve automatic reversing.

[0039] Preferably, the reversing bracket 503 is provided with a limiting abutment 506, and the limiting abutment 506 is provided with a limiting part for abutting against the rotating bracket 504. Specifically, the limiting abutment 506 is located beside the flipping path of the rotating bracket 504. The limiting part is an abutment structure (e.g., a protrusion or adjusting bolt) on the limiting abutment 506 facing the rotating bracket 504. When the rotating bracket 504 drives the workpiece to the extreme position of the horizontal or vertical posture, the outer wall of the rotating bracket 504 abuts against the limiting part, thereby mechanically limiting the rotation angle of the rotating bracket 504.

[0040] like Figure 7 As shown, preferably, the stacking tray 501 has multiple positioning holes 507 arranged on it, and each positioning hole 507 has at least one positioning step 508. The inner diameter of each positioning step 508 is different to accommodate workpieces with different outer diameters. When a workpiece is inserted into a positioning hole, its lower end or outer flange abuts against the corresponding positioning step 508, thereby accurately positioning the workpiece vertically on the stacking tray 501, and ensuring that the height of each workpiece is consistent, which facilitates precise gripping by the fixing claw 505 of the reversing component 502.

[0041] It should be noted that in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0043] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A dual-drilling processing device, characterized in that, include: The spindle, which can rotate around its own axis, is used to clamp the workpiece and drive the workpiece to rotate. The top clamp is coaxially arranged with the main shaft and can move along the axial direction of the main shaft to approach or move away from the main shaft. The end face of the top clamp facing the main shaft is used to abut against the workpiece. A centering drill bit, the axis of which is perpendicular to the axis of the spindle, is used to machine a centering hole on the outer circumferential surface of a workpiece; Two drilling bits are spaced apart around the axis of the main shaft, and the axis of each drilling bit is perpendicular to the axis of the main shaft.

2. The dual-drilling processing device according to claim 1, characterized in that, The two drilling bits are symmetrically arranged in the horizontal direction, while the centering bit and the drilling bit are distributed perpendicularly to each other in the radial direction of the spindle.

3. The dual-drilling processing device according to claim 1, characterized in that, The end face of the top clamp is provided with a top clamping recess, the top clamping recess includes an abutment surface, the diameter of the abutment surface is equal to the diameter of the workpiece, and the inner wall of the top clamping recess is conical.

4. The dual-drilling processing device according to claim 1, characterized in that, It also includes a housing and a mechanical gripper disposed on the top of the housing; the main shaft and the top clamp are both disposed in the housing, and the main shaft and the top clamp can move synchronously along the axial direction of the main shaft; the top of the housing is provided with an access port for the mechanical gripper to extend into.

5. The dual-drilling processing device according to claim 4, characterized in that, A sliding door is provided at the inlet, which can move in a straight line to open or close the inlet; and the sliding door is configured to close the inlet when the main shaft is in operation.

6. The dual-drilling processing device according to claim 4, characterized in that, The bottom of the spindle is provided with a base frame, and a mounting base is provided on the base frame. The spindle and the top clamp are both provided on the mounting base. A vertically penetrating collection cavity is opened on the base frame, and a collection box is provided at the bottom of the base frame. The vertical projection of the collection cavity is located in the collection box.

7. The dual-drilling processing apparatus according to claim 6, characterized in that, The bottom wall of the collection box is flat, and there is a height difference between the two ends of the collection box along its length.

8. The dual-drilling processing apparatus according to claim 1, characterized in that, It also includes a support platform, on which a stacking tray is provided for supporting workpieces. The axis of the workpiece on the stacking tray is located in the vertical direction, while the axis of the spindle is located in the horizontal direction. A reversing component is provided on the support platform for vertical reversing of the workpiece.

9. The dual-drilling processing apparatus according to claim 8, characterized in that, The reversing component includes a reversing bracket fixedly mounted on the bearing platform, a rotating bracket rotatably mounted on the reversing bracket, and a fixed gripper mounted on the rotating bracket. The rotating bracket can drive the workpiece to rotate and switch between a horizontal and a vertical posture.

10. The dual-drilling processing apparatus according to claim 8, characterized in that, The material stacking tray has multiple positioning holes arranged in a row, and each positioning hole has at least one positioning step.

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