A supplementary process for machining precision of aluminum alloy workpiece

Abstract

The application discloses a machining precision supplement process for an aluminum alloy workpiece, which comprises the following steps: installing a workpiece to be machined on a rotating fixed gripper; positioning and fixing the workpiece to be machined; aligning a cutter with a machining position and machining holes of the workpiece to be machined; positioning the workpiece to be machined again after the workpiece is rotated; contacting an on-line center detection probe with a second machining surface; receiving and collecting contact signals and calculating the position deviation of the front and back machining surfaces by a receiver and a control box; adjusting the position of the workpiece to be machined or the position of the cutter so that the center of a predetermined machining hole in the second machining surface after rotation is aligned with the cutter; machining the workpiece to be machined again; and machining the remaining coaxial holes on the workpiece. The machining precision of coaxial holes in workpiece machining is improved, the centers of coaxial holes are ensured to be on the same reference axis in the horizontal direction, the product quality is improved, the process is highly versatile, the machining efficiency is high, and the labor cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of aluminum alloy workpiece processing and manufacturing, and specifically to a process for improving the processing accuracy of aluminum alloy workpieces. Background Technology

[0002] In the machinery manufacturing industry, drilling holes in workpieces is an important process. Typically, the steps involved in drilling include selecting the cutting tool, positioning the workpiece, clamping the workpiece, drilling, and removing debris.

[0003] Among existing hole-machining equipment on the market, the performance in the workpiece positioning step is unsatisfactory. Although it can machine holes at different positions on the same horizontal plane of the workpiece, it is difficult to machine holes at other positions on the workpiece. For example, Chinese patent CN204449395U, entitled "A Three-Axis CNC Drilling Machine," discloses a hole-machining device, including a base, a rotary worktable and a spindle box on the base, and a horizontal slide rail below the spindle box. The spindle box and the horizontal slide rail are connected by a sliding frame, and the spindle box can move up and down relative to the sliding frame and is driven by the sliding frame to move horizontally. In use, this hole-machining device can only machine holes at different positions on the same horizontal plane.

[0004] However, in reality, with the continuous development of mechanical manufacturing technology, simple hole-machining equipment can no longer meet the production needs of precision-machined parts. In existing technology, when machining coaxial holes on different horizontal planes on the same workpiece, it is necessary to first drill a hole in one horizontal plane of the workpiece; after drilling, the position of the workpiece is manually adjusted so that the second horizontal plane is in the same machining position as the first horizontal plane, and then drilling is performed again. Although this method can create two opposing holes on the workpiece, the position of the workpiece's machining horizontal plane inevitably deviates from the position of the first-machined horizontal plane after the movement, causing a shift in the preset drilling position. This results in poor hole machining accuracy, low efficiency, and an inability to meet the needs of rapid machining of high-precision coaxial holes in actual production.

[0005] (I) Problems to be solved

[0006] The technical problem to be solved by the present invention is to provide a supplementary process for improving the machining accuracy of aluminum alloy workpieces, in light of the current state of the technology.

[0007] (II) Technical Solution

[0008] This invention is achieved through the following technical solution:

[0009] This invention proposes a process for improving the machining accuracy of aluminum alloy workpieces, comprising the following steps:

[0010] S10, the aluminum alloy workpiece to be processed is installed on the rotating fixed gripper inside the CNC machine tool;

[0011] S20, by controlling the rotating fixed gripper of the CNC machine tool, the aluminum alloy workpiece to be processed is adjusted to a spatial placement state in which the first surface to be processed corresponds to the moving direction of the tool set inside the CNC machine tool;

[0012] S30, the tool is mounted on the machining shifting assembly in the CNC machine tool. The high-speed rotating tool is moved to the first surface to be machined on the aluminum alloy workpiece through the machining shifting assembly, and the machining and drilling operation is performed. The first hole machined at this time is the first reference hole.

[0013] S50, by rotating the fixed gripper, the aluminum alloy workpiece to be processed is rotated so that the second surface to be processed of the aluminum alloy workpiece is in a spatially corresponding position to the moving direction of the tool set inside the CNC machine tool; at this time, the second surface to be processed will be offset from the processing position of the first surface to be processed, and cannot be completely aligned with the tool.

[0014] S60, in a CNC machine tool, after the online center detection probe in the tool magazine moves and comes into contact with the second surface to be machined, the receiver installed inside the CNC machine tool receives the contact signal and converts the contact signal into a digital signal;

[0015] S70: After processing and analyzing the digital signal, the receiver transmits the obtained data information to the control system of the CNC machine tool for further calculation and control.

[0016] S80, the online center detection probe contacts the second surface to be machined; the receiver and the control system of the CNC machine tool record the coordinate position and measurement data of the second surface to be machined and calculate the center position of the machined hole;

[0017] S90, by calculating the center position, compensates for the actual machining position, adjusts the position of the tool, and aligns the tool tip with the machining center of the second surface to be machined;

[0018] S100: The high-speed rotating tool is moved to the second surface to be machined on the aluminum alloy workpiece by the machining displacement component, and a drilling operation is performed; the second hole machined at this time is the second reference hole.

[0019] S110: Adjust the position of the aluminum alloy workpiece to be processed by rotating the fixed gripper or adjust the tool position by the CNC machine tool so that the tool is aligned with other processing surfaces. Repeat steps S30 to S100 until all drilling operations on the aluminum alloy workpiece to be processed are completed.

[0020] By adopting the above solution, this invention installs a rotating fixed gripper, an online center detection probe, a receiver, and built-in drilling processing software within a CNC machine tool. Through steps such as positioning, drilling, detection, secondary positioning, precision supplementation, and secondary drilling, it completes the machining of coaxial holes on different machining planes of the same workpiece and improves the machining accuracy of the coaxial holes. This ensures that the centers of corresponding coaxial holes are all on the same horizontal reference axis, thus improving product quality.

[0021] Furthermore, a workpiece clamping part is provided in the middle of the aluminum alloy workpiece to be processed.

[0022] Furthermore, one end of the aluminum alloy workpiece to be processed has a corresponding hole plane on the other end.

[0023] Furthermore, the displacement of the second surface to be processed compared to the processing position of the first surface to be processed is between 1 μm and 10 μm.

[0024] Furthermore, the displacement of the second surface to be processed compared to the processing position of the first surface to be processed is between 1 and 10 meshes.

[0025] Furthermore, after the online center detection probe has completed the contact step with the second surface to be processed and the receiver has completed the process of receiving the contact signal, the online center detection probe automatically retracts.

[0026] Furthermore, in steps S30 to S50, the CNC machine tool records the spatial coordinate position of the first reference hole.

[0027] Furthermore, in step S90, the calculated center position is combined with the center position of the first reference hole to compensate and adjust the first contact point between the tool and the machined surface for hole machining, so that the center of the first reference hole and the center of the second reference hole are on the same reference axis in the horizontal direction.

[0028] Furthermore, the rotary fixed gripper can be movably installed inside the CNC machine tool. The rotary fixed gripper can rotate the aluminum alloy workpiece to be machined via a rotary axis. When machining the second reference surface, the rotary fixed gripper holds the aluminum alloy workpiece to be machined and flips it 180 degrees.

[0029] Furthermore, CNC machine tools have built-in drilling processing software.

[0030] (III) Beneficial Effects

[0031] 1. This invention installs a rotating fixed gripper, an online center detection probe, a receiver, and built-in drilling software within a CNC machine tool. Through steps such as positioning, drilling, detection, secondary positioning, precision compensation, and secondary drilling, it completes the machining of coaxial holes on different machining planes of the same workpiece, improving the machining accuracy of coaxial holes. It ensures that the centers of corresponding coaxial holes are all on the same horizontal reference axis, thus improving product quality.

[0032] 2. This invention utilizes CNC technology, completing the hole machining process within the machine tool. Through simple programming and the use of built-in drilling software, parameters such as drilling position and depth can be adjusted for different workpieces, resulting in strong versatility and high processing efficiency. Furthermore, the automated mechanical adjustment of the workpiece's positioning position via a rotating fixed gripper replaces manual adjustment, accelerating drilling speed and reducing labor costs. Attached Figure Description

[0033] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0034] Figure 1 This is a schematic diagram of the steps involved in producing an aluminum alloy workpiece according to the present invention;

[0035] Figure 2 This is a partial view of the machining process of a machining accuracy supplementation process for an aluminum alloy workpiece as described in this invention;

[0036] Figure 3 This is a schematic diagram of the structure of an aluminum alloy workpiece after processing, according to the supplementary processing technology for improving the processing accuracy of an aluminum alloy workpiece as described in this invention.

[0037] The accompanying reference numerals are as follows:

[0038] 1. Aluminum alloy workpiece to be processed; 2. Rotating fixed gripper; 3. First surface to be processed; 4. First reference hole; 5. Second surface to be processed; 6. Second reference hole; 7. Cutting tool; 8. Workpiece clamping part; 9. Processing shifting assembly; 10. Rotating shaft; 11. Plane of hole to be processed. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] In the description of this application, it should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to or indirectly connected to the other element.

[0041] In the description of this application, it should be understood that the terms "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0042] Please see Figures 1-3 This invention provides a process for improving the machining accuracy of aluminum alloy workpieces, comprising the following steps:

[0043] S10, the aluminum alloy workpiece 1 to be processed is mounted on the rotating fixed gripper 2 inside the CNC machine tool;

[0044] S20, the aluminum alloy workpiece 1 to be processed is adjusted by the CNC machine tool to the first surface to be processed 3 and the moving direction of the tool 7 set inside the CNC machine tool are in a spatially corresponding state.

[0045] S30, the cutting tool 7 is installed on the machining shifting assembly 9 in the CNC machine tool. The high-speed rotating cutting tool 7 is moved towards the first machining surface 3 of the aluminum alloy workpiece 1 to be machined by the machining shifting assembly 9, and the machining and drilling operation is performed. At this time, the first hole is the first reference hole 4.

[0046] S50, by rotating the fixed gripper 2, the aluminum alloy workpiece 1 to be processed is rotated so that the second surface 5 to be processed of the aluminum alloy workpiece 1 is in a spatially corresponding position to the moving direction of the tool set inside the CNC machine tool; at this time, the second surface 5 to be processed will be offset from the processing position of the first surface 3 to be processed, and cannot be completely aligned with the tool 7.

[0047] S60, in a CNC machine tool, after the online center detection probe in the tool magazine moves and comes into contact with the second surface to be machined 5, the receiver installed inside the CNC machine tool receives the contact signal and converts the contact signal into a digital signal;

[0048] S70: After processing and analyzing the digital signal, the receiver transmits the obtained data information to the control system of the CNC machine tool for further calculation and control.

[0049] S80, the online center detection probe contacts the second surface to be processed 5; the receiver and the control system of the CNC machine tool record the coordinate position and measurement data of the second surface to be processed and calculate the center position of the processed circular hole;

[0050] S90, by calculating the center position, the actual machining position is compensated, the position of the tool 7 is adjusted and the tool tip is aligned with the machining center of the second surface to be machined 5;

[0051] S100, the high-speed rotating tool 7 is moved towards the second surface 5 of the aluminum alloy workpiece to be machined by the machining shifting component 9, and a drilling operation is performed; the second hole machined at this time is the second reference hole 6.

[0052] S110: Adjust the position of the aluminum alloy workpiece 1 to be processed by rotating the fixed gripper 2 or adjust the position of the tool 7 by the CNC machine tool so that the tool 7 is aligned with other processing surfaces. Repeat steps S30 to S100 until all drilling operations of the aluminum alloy workpiece 1 to be processed are completed.

[0053] Specifically, a workpiece clamping part 8 is provided in the middle of the aluminum alloy workpiece 1 to be processed. The workpiece clamping part 8 can easily rotate and fix the gripper 2 to clamp and fix or lock the aluminum alloy workpiece 1 to be processed, so that the aluminum alloy workpiece will not shift position during processing.

[0054] Specifically, one end of the aluminum alloy workpiece 1 to be processed has a corresponding hole plane 11 at the other end. By setting the hole plane 11 at both ends, after processing, the aluminum alloy workpiece can be fixedly and securely installed in the parts of other products and equipment through the through holes with high precision, so that the connection positions of different connecting parts connected to the aluminum alloy workpiece are on a coaxial line designed.

[0055] Specifically, the displacement of the second surface to be processed 5 compared to the processing position of the first surface to be processed 3 is between 1 μm and 10 μm. Through steps S60 to S100, the position of the actual first processing point is adjusted based on the displacement deviation to improve processing accuracy and product quality.

[0056] Specifically, the displacement of the second surface to be processed 5 compared to the processing position of the first surface to be processed 3 is between 1 and 10 meshes. Through steps S60 to S100, the position of the actual first processing point is adjusted based on the displacement deviation to improve processing accuracy and product quality.

[0057] Specifically, after the online center detection probe completes the contact step with the second surface to be machined 5 and the receiver completes the process of receiving the contact signal, the online center detection probe automatically retracts. The online center detection probe's detection result is accurate, and after automatic detection, the probe is removed without contacting the cutting tool, preventing any impact on the drilling process.

[0058] Specifically, in steps S30 to S50, the CNC machine tool records the spatial coordinate position of the first reference hole 4. Recording the spatial coordinate position of the first reference hole 4 allows for comparison, analysis, and calculation of the positional offset by comparing it with the detected spatial coordinates of the second machined surface.

[0059] Specifically, in step S90, the calculated center position is used in conjunction with the center position of the first reference hole 4 to compensate and adjust the first contact point between the tool and the machining surface for hole machining, ensuring that the center of the first reference hole 4 and the center of the second reference hole 6 are on the same horizontal reference axis. The position of the tool 7 or the aluminum alloy workpiece 1 to be machined is adjusted to ensure that the machining centers of the through holes are coaxial, thus improving product quality.

[0060] Specifically, the rotary fixed gripper 2 is movably installed inside the CNC machine tool. The rotary fixed gripper 2 can rotate the aluminum alloy workpiece 1 to be machined via the rotating shaft 10. When machining the second reference surface, the rotary fixed gripper 2 clamps the aluminum alloy workpiece 1 and rotates it 180 degrees. The rotary fixed gripper 2 is connected to the CNC machine tool via a movable connecting mechanism. The rotary fixed gripper 2 is equipped with a retractable adjustment block, which allows for fine-tuning of the position of the aluminum alloy workpiece 1. The rotary fixed gripper 2 can perform displacement and clamping operations on the aluminum alloy workpiece 1, ensuring accurate alignment of the machining surface with the tool 7. The connection between the rotary fixed gripper 2 and the movable connecting mechanism improves the flexibility of the rotary fixed gripper 2. The retractable adjustment block on the rotary fixed gripper 2 allows for fine-tuning of the aluminum alloy workpiece 1, further enhancing machining accuracy.

[0061] Specifically, CNC machine tools have built-in drilling processing software. Through simple programming and using the built-in drilling processing software, parameters such as the drilling position and depth of different workpieces can be adjusted, which is highly versatile and efficient.

[0062] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A process for improving the machining accuracy of aluminum alloy workpieces, characterized in that: Includes the following steps: S10, the aluminum alloy workpiece to be processed is installed on the rotating fixed gripper inside the CNC machine tool; S20, the aluminum alloy workpiece to be processed is adjusted by the CNC machine tool to a spatial placement state in which the first surface to be processed corresponds to the moving direction of the tool set inside the CNC machine tool through the control of the rotating fixed gripper; S30, the cutting tool is mounted on the machining shifting assembly in the CNC machine tool. The high-speed rotating cutting tool is moved to the first machining surface of the aluminum alloy workpiece to be machined by the machining shifting assembly, and a machining and drilling operation is performed. At this time, the first hole processed is the first reference hole. S50, the rotating fixed gripper rotates the aluminum alloy workpiece to be processed, so that the second surface to be processed of the aluminum alloy workpiece is in a spatially corresponding position to the moving direction of the tool set inside the CNC machine tool; at this time, the second surface to be processed will be offset from the processing position of the first surface to be processed, and cannot be completely aligned with the tool. S60, in the CNC machine tool, after the online center detection probe in the tool magazine moves and comes into contact with the second surface to be machined, the receiver installed inside the CNC machine tool receives the contact signal and converts it into a digital signal; S70, after the receiver processes and analyzes the digital signal, it further transmits the obtained data information to the control system of the CNC machine tool for further calculation and control; S80, the online center detection probe contacts the second surface to be processed; the receiver and the control system of the CNC machine tool record the coordinate position and measurement data of the second surface to be processed and calculate the center position of the processed circular hole; S90, by calculating the center position, the actual machining position is compensated, the position of the tool is adjusted and the tool tip is aligned with the machining center of the second surface to be machined; S100, the high-speed rotating tool is moved to the second surface to be machined on the aluminum alloy workpiece by the machining displacement component, and a drilling operation is performed; the second hole machined at this time is the second reference hole. S110, adjust the position of the aluminum alloy workpiece to be processed by the rotating fixed gripper or adjust the position of the tool by the CNC machine tool so that the tool is aligned with other processing surfaces, repeat steps S30 to S100 until all drilling operations of the aluminum alloy workpiece to be processed are completed. In steps S30 to S50, the CNC machine tool records the spatial coordinate position of the first reference hole; in step S90, the calculated center position is combined with the center position of the first reference hole to compensate and adjust the first contact point between the tool and the machining surface for hole machining, so that the center of the first reference hole and the center of the second reference hole are on the same reference axis in the horizontal direction.

2. The machining accuracy improvement process for aluminum alloy workpieces according to claim 1, characterized in that: The aluminum alloy workpiece to be processed has a workpiece clamping part in the middle.

3. The machining accuracy improvement process for aluminum alloy workpieces according to claim 2, characterized in that: One end of the aluminum alloy workpiece to be processed has a corresponding hole plane at the other end.

4. The machining accuracy improvement process for aluminum alloy workpieces according to claim 3, characterized in that: The displacement of the second surface to be processed compared to the processing position of the first surface to be processed is 1 μm to 10 μm.

5. The machining accuracy supplementation process for aluminum alloy workpieces according to claim 1, characterized in that: After the online center detection probe completes the contact step with the second surface to be processed and the receiver completes the process of receiving the contact signal, the online center detection probe automatically retracts.

6. The machining accuracy supplementation process for aluminum alloy workpieces according to claim 1, characterized in that: The rotating fixed gripper is movably installed inside the CNC machine tool. The rotating fixed gripper can rotate the aluminum alloy workpiece to be processed via a rotating shaft. When processing the second reference hole, the rotating fixed gripper holds the aluminum alloy workpiece to be processed and flips it 180 degrees.

7. The machining accuracy supplementation process for aluminum alloy workpieces according to claim 1, characterized in that: The CNC machine tool has built-in drilling software.

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