Shaft milling tool, mistake proofing method and machine tool

Abstract

The present application relates to the technical field of shaft milling tooling detection and mistake-proofing, and discloses a shaft milling tooling, a mistake-proofing method and a machine tool. The shaft milling tooling comprises a fixing assembly, a rotating assembly and a detection assembly. The fixing assembly is used for positioning and fixing the shaft. The fixing assembly comprises a front end fixing structure and a rear end fixing structure. The rotating assembly is used for rotating the shaft. The detection assembly is used for detecting the shaft. The detection assembly comprises a detection sensor and a displacement driving assembly. The detection sensor is a contact or non-contact sensor. The displacement driving assembly is used for driving the detection sensor to contact the shaft. The present application combines an automatic mistake-proofing device on the tooling. The automatic detection can prevent repeated clamping, repeated processing and other errors during the machining process. The present application greatly improves the accuracy and efficiency of the machining, does not require manual intervention, greatly reduces the workload of workers, avoids misjudgment caused by human factors, and improves the stability and reliability of production.

Description

Technical Field

[0001] This invention relates to the field of shaft milling fixture detection and error prevention technology, specifically to a shaft milling fixture, error prevention method, and machine tool. Background Technology

[0002] In the field of machining technology, the machining of shaft parts is a common task. Milling is a crucial machining process for shaft parts, primarily used to create planes of various shapes and sizes. In actual production, CNC machine tools are typically used for automated machining to improve efficiency and product quality. However, due to the complex structure of shaft parts, various problems may arise during machining, such as repeated clamping and reprocessing, which can lead to unstable product quality and even equipment damage. Therefore, effectively preventing these errors during machining is a pressing issue in shaft part machining, and this application addresses this problem. Summary of the Invention

[0003] The purpose of this invention is to provide a shaft milling fixture, error prevention method, and machine tool to avoid errors such as repeated clamping and repeated processing during the machining of shaft parts, thereby improving product quality and equipment safety.

[0004] The present invention is achieved through the following technical solution.

[0005] The present invention provides a shaft milling fixture, comprising a fixing component, a rotating component, and a probing component. The fixing component is used to position and fix the shaft, and includes a front fixing structure and a rear fixing structure. The rotating component is used to rotate the shaft. The probing component is used to probe the shaft, and includes a probe sensor and a displacement driving component. The probe sensor is a contact or non-contact sensor, and the displacement driving component is used to drive the probe sensor to contact the shaft.

[0006] Furthermore, the front-end fixing structure includes a front-end telescopic drive and a push pin, wherein the front-end telescopic drive is used to drive the push pin to move.

[0007] Furthermore, the rear-end fixing structure includes a mandrel, a rear-end telescopic drive, and a rear positioning block. The rear positioning block is mounted on the mandrel, and the rear-end telescopic drive is used to drive the mandrel to move. The mandrel matches the shape of the shaft end.

[0008] Furthermore, the rotating assembly is connected to the mandrel.

[0009] Furthermore, the fixing component also includes a support block for supporting the detection position of the shaft.

[0010] Furthermore, the shaft milling fixture also includes a mid-section positioning fixture, which is provided with a tapered sleeve that matches the shaft taper, and the ejector pin can enter and exit the tapered sleeve.

[0011] Furthermore, the conical sleeve is detachable.

[0012] A machine tool is provided with the aforementioned shaft milling fixture, and a detection sensor is electrically connected to the machine tool control system.

[0013] A method for preventing errors in shaft milling, based on the aforementioned machine tool, includes the following steps: S1: Fix the product shaft using the front-end fixing structure and the rear-end fixing structure; S2: Rotation is achieved by using a rotating component to drive the shaft; S3: The displacement drive component drives the detection sensor to contact the shaft, and the detection sensor detects whether the shaft has been milled flat. S4: After the detection is completed, if the shaft has been machined, the detection sensor sends an alarm command; if the shaft has not been machined, it sends a command to proceed to the next step.

[0014] Furthermore, it also includes the following steps: S5: After receiving the next action command, the control system starts the machining action. The ejector pin exits the tapered sleeve, and the rear telescopic drive uses the rear positioning block to push the tapered surface of the shaft to cooperate with the tapered sleeve to achieve positioning. After positioning is completed, the milling step is performed.

[0015] The beneficial effects of this invention are: This invention integrates an automatic error-proofing device into the tooling, which can automatically detect and prevent errors such as repeated clamping and repeated processing during the machining process, achieving fully automatic error prevention, greatly improving the accuracy and efficiency of machining, eliminating the need for manual intervention, greatly reducing the workload of workers, and also avoiding misjudgments caused by human factors, thus improving the stability and reliability of production.

[0016] Once a processed product is detected, the detection sensor immediately sends a signal back to the machine tool. The equipment alarms and cannot initiate the next step, effectively preventing a large number of defective products from being produced before the error is detected. This effectively prevents errors, improves product quality, increases production efficiency, and reduces production costs, demonstrating high practical value and broad application prospects. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 A schematic diagram of the overall structure of a shaft milling fixture; Figure 2 This is a top view of a shaft milling fixture. Detailed Implementation

[0020] The following is combined with Figure 1-2 The present invention will be described in detail below.

[0021] A type of shaft milling fixture, such as Figure 1 It includes a fixing component, a rotating component 5, and a detection component. The fixing component is used to position and fix the shaft. The fixing component includes a front fixing structure and a rear fixing structure. The rotating component 5 is used to rotate the shaft. The detection component is used to detect the shaft. The detection component includes a detection sensor 3 and a displacement driving component 4. The detection sensor is a contact or non-contact sensor. The displacement driving component is used to drive the detection sensor to contact the shaft.

[0022] Specifically, the front-end fixing structure includes a front-end telescopic drive 1 and an ejector pin 2, with the front-end telescopic drive 1 used to drive the ejector pin 2 to move. The rear-end fixing structure includes a mandrel 9, a rear-end telescopic drive 6, and a rear positioning block 10, with the rear positioning block 10 mounted on the mandrel 9 and the rear-end telescopic drive 6 used to drive the mandrel 9 to move, the mandrel 9 matching the shape of the shaft end.

[0023] The product shaft 100 has a splined hole at its rear end and a tapered surface at its front end. In this embodiment, the splined end of the shaft is a 16-tooth spline, which is fitted onto the 16-tooth profiled mandrel of the rear-end fixed structure. This step is mainly to ensure accurate positioning of the product to facilitate subsequent machining operations.

[0024] It should be noted that in this embodiment, the end of the shaft 100 that mates with the mandrel has an internal spline, and the mandrel is inserted into the shaft. In other embodiments, clamps or other fixing structures can also be used, and the settings can be made according to the type of shaft being processed.

[0025] In this embodiment, both the front telescopic drive 1 and the rear telescopic drive 6 are cylinders, the displacement drive assembly 4 is a three-axis cylinder, and the detection sensor 3 can be a pressure sensor, displacement sensor, ultrasonic sensor, etc. The contact type can be implemented in conjunction with the telescopic structure.

[0026] In this embodiment, the rotating component 5 uses a servo motor and a reducer, which is connected to the mandrel 9 via gears or belts to drive the mandrel 9 to rotate. The mandrel 9 is rotatably connected to the cylinder.

[0027] Preferably, the fixing component further includes a support block 8, which supports the detection position of the shaft and also provides support during subsequent milling to prevent shaft deformation.

[0028] To facilitate subsequent machining positioning, the shaft milling fixture also includes a mid-section positioning fixture 7. The mid-section positioning fixture 7 is equipped with a tapered sleeve 71 that matches the tapered surface of the shaft. The ejector pin 2 can enter and exit the tapered sleeve 71. The mid-section positioning fixture 7 or the tapered sleeve 71 is detachable. In this embodiment, the tapered sleeve 71 is installed on the mid-section positioning fixture 7 with screws. By replacing the tapered sleeve with one of different sizes, it can be adapted to shafts of different sizes. When the inspection is completed and the next machining step is required, the ejector pin 2 exits the tapered sleeve 71. Under the pushing action of the rear positioning block 10, the tapered surface of the shaft enters the tapered sleeve, thereby achieving the positioning of the shaft. Furthermore, the subsequent machining detection components will not interfere with the milling cutter.

[0029] A machine tool is provided with the aforementioned shaft milling fixture. A detection sensor 3 is electrically connected to the machine tool control system. After detecting the shaft, the detection sensor 3 determines whether the shaft has been machined. If it has been machined, it sends a command to the machine tool control system, which then issues an alarm, such as an audible and visual alarm, and prevents the equipment from starting the next operation. If it has not been machined, the machine tool control system issues a command to continue machining.

[0030] A method for preventing errors in shaft milling includes the following steps: Step 1: First, fit the 16-tooth splined end of the product shaft onto the 16-tooth profile mandrel of the positioning fixture. This step is mainly to ensure accurate positioning of the product to facilitate subsequent machining operations.

[0031] Step Two: Press the equipment start button. Under the action of the cylinder, the rear positioning block 10 pushes the product forward, and the product moves forward axially along the 16-tooth positioning mandrel. At the same time, the front center moves backward under the action of the front cylinder and presses against the front center hole of the product. At this time, the product is positioned and fixed by the rear positioning block and the front center. This step mainly uses the action of the cylinder to enable the product to be accurately positioned on the tooling in preparation for the next step of detection.

[0032] Step 3: The 16-tooth profiling mandrel, driven by a servo motor, rotates the product one revolution. Simultaneously, the contact sensor 3, controlled by the displacement drive assembly 4, extends to the milled flat position for contact detection. This step primarily achieves product detection through a special top-mounted design and the coordinated operation of the cylinder and motor.

[0033] Step 4: If the product has already been processed, the detection sensor will send a signal to the machine tool, triggering an alarm and preventing the next step from starting. This step primarily uses the detection sensor to achieve real-time monitoring of the processing and prevent errors from occurring.

[0034] Step 5: With the green light detected, the program proceeds to the next step: the rear positioning block and the 16-tooth profile mandrel together push the product forward axially, the center hole tip of the front cylinder retracts, and the product's conical surface fits onto the conical sleeve of the intermediate positioning fixture. At this point, the product is fixed, and the equipment program controls the milling cutter to complete the milling operation. This step mainly achieves precise product positioning and efficient processing through equipment program control, and the setting of the detection component does not affect product processing, which is beneficial to improving processing efficiency.

[0035] Step Six: After the milling operation is completed, the program completes its full cycle, the mandrel retracts, and the operator removes the product, thus completing this process. This step is primarily to ensure smooth processing and safe product removal. The above is a detailed implementation of this embodiment. In this way, we can effectively avoid errors such as repeated clamping and processing during the machining of shaft parts, improve product quality and equipment safety, and also effectively reduce production costs and increase production efficiency.

[0036] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand and implement the present invention. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A method for preventing errors in shaft milling, characterized in that, A machine tool is used, which is equipped with a shaft milling fixture. The shaft milling fixture includes a fixing component, a rotating component (5) and a detection component. The fixing component is used to position and fix the shaft. The fixing component includes a front fixing structure and a rear fixing structure. The rotating component (5) is used to rotate the shaft. The detection component is used to detect the shaft. The detection component includes a detection sensor (3) and a displacement driving component (4). The displacement driving component is used to drive the detection sensor to the detection position. The front-end fixing structure includes a front-end telescopic drive (1) and a push pin (2), wherein the front-end telescopic drive (1) is used to drive the push pin (2) to move; The rear-end fixing structure includes a mandrel (9), a rear-end telescopic drive (6), and a rear positioning block (10). The rear positioning block (10) is mounted on the mandrel (9). The rear-end telescopic drive (6) is used to drive the mandrel (9) to move. The mandrel (9) matches the shape of the shaft end. The rotating component (5) is connected to the mandrel (9); The shaft milling fixture also includes a mid-section positioning fixture (7), on which a tapered sleeve (71) matching the shaft taper is provided, and the ejector pin (2) can enter and exit the tapered sleeve; The fixing component also includes a support block (8) for supporting the detection position of the shaft; The detection sensor (3) is electrically connected to the machine tool control system; Error prevention methods for shaft milling include the following steps: S1: Fit the spline end of the product shaft into the contour mandrel of the positioning fixture; S2: Start the equipment. The rear positioning block (10) pushes the product forward under the action of the cylinder. The product moves forward along the toothed positioning core. At the same time, the front ejector pin moves backward under the action of the front cylinder and presses against the front center hole of the product. At this time, the product is positioned and fixed by the rear positioning block and the front ejector pin. S3: The contour mandrel drives the product to rotate one revolution under the action of the servo motor, and at the same time, the contact detection sensor (3) controlled by the displacement drive component (4) extends to the milling flat position for contact detection. S4: If the product has already been processed, the detection sensor (3) will send a signal to the machine tool, and the equipment will alarm and cannot start the next action; S5: When the green light is detected, the program will continue to the next step: the rear positioning block and the contour mandrel together push the product forward along the axis, the center hole pin of the front cylinder retracts, so that the conical surface of the product is fitted onto the conical sleeve of the intermediate section positioning fixture. At this time, the product is fixed, and the equipment program controls the milling cutter to complete the milling operation. S6: After the milling operation is completed, the program completes the entire process, the mandrel is withdrawn, and this operation is completed.

2. The error-proofing method for shaft milling according to claim 1, characterized in that: The cone sleeve (71) is detachable.

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