High-precision gear shaping phase tooth processing device and method

Abstract

The application discloses a high-precision gear shaping phase tooth processing device and method, and belongs to the technical field of tooling and measuring tools, which comprises a cutter, a cutter handle and a micrometer, the cutter is disc-shaped, teeth are uniformly distributed on the circumference of the cutter, and a positioning hole is arranged in the center of the cutter; the cutter handle is cylindrical, a positioning pin is arranged at one end of the cutter handle, the positioning pin can be matched with the positioning hole, a handle is arranged at the other end of the cutter handle, and a micrometer clamping groove is arranged on the cylindrical surface of the cutter handle; the micrometer is fixed on a positioning block, the positioning block can be matched with the micrometer clamping groove, a measuring needle is arranged at one end of the positioning block, a limiting groove is further arranged on the surface of the cutter, the positioning block can slide in the limiting groove, the measuring needle is hingedly connected with the positioning block, the measuring needle is parallel to the plane where the cutter is located when measurement is performed, the measuring needle is perpendicular to the plane where the cutter is located when the cutter is processed, the minimum range of the micrometer is 0.002 mm, a key groove is further arranged on the cutter handle, the key groove is parallel to the center line of the cutter handle, and the line connecting the key groove and the micrometer clamping groove is parallel to the center line of the cutter handle. The application improves the yield and quality, reduces the time cost, and is beneficial to trial production and batch processing.

Description

Technical Field

[0001] This invention belongs to the field of tooling and measuring technology, specifically a high-precision gear-shaping phase alignment processing device and method. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the technical requirements for various aspects of the industry are also constantly increasing, and the reducer is an important component of the automobile. There are many ways to process the gears inside the reducer, but currently there is no perfect secondary clamping processing method or applicable equipment for gear machining, such as gear cutting and gear hobbing. After the rough machining of the blank is completed, heat treatment is performed for surface hardening. For the tooth surface, the problem of inaccurate gear alignment occurs during the post-heat finishing process, making it impossible to complete the secondary finishing. The current technology usually involves post-heat grinding, which requires a gear grinding machine. Summary of the Invention

[0003] To address the above problems, this invention provides a high-precision gear-shaping phase alignment machining device and method, including a cutting tool, a tool holder, and a dial indicator. The cutting tool is disc-shaped with evenly distributed machining teeth on its circumference and a positioning hole at its center. The tool holder is cylindrical, with a positioning pin at one end that matches the positioning hole, and a handle at the other end. A dial indicator slot is provided on the cylindrical surface of the tool holder. The dial indicator is fixed to a positioning block that matches the dial indicator slot. A measuring needle is provided at one end of the positioning block, and a limiting groove is provided on the surface of the cutting tool, allowing the positioning block to slide within the limiting groove. The measuring needle is hinged to the positioning block and measures... The dial indicator is parallel to the plane where the tool is located, and perpendicular to the plane where the tool is located during machining. The minimum range of the dial indicator is 0.002mm. The tool holder also has a keyway, and the line connecting the keyway and the dial indicator slot is parallel to the center line of the tool holder. This invention breaks through the existing single-function functions and technologies. Existing gear shaping machine tools only have the linkage of the machine tool spindle C1 / C2 axis, that is, the linkage action of the tool axis and the workpiece axis. They do not have the function and device for phase gear splitting. After the workpiece is finished and disassembled, it is impossible to re-set the tool or repeat the positioning and re-machining. Therefore, the machining is simple and wasteful of blanks. These problems need to be solved. First, a gear shaping tool with a precision dial indicator is designed to achieve high-precision identification of the phase angle during flexible clamping. It can accurately perform secondary machining of gears, and then achieve the beneficial effects of high quality, high efficiency, and energy saving. It not only improves the productivity and quality, but also reduces time costs, which is beneficial for trial production and batch processing.

[0004] The technical solution of this invention is as follows: a high-precision gear-shaping phase alignment machining device, comprising: a cutting tool, a tool holder, and a dial indicator; the cutting tool is disc-shaped with machining teeth evenly distributed on its circumference, and a positioning hole is provided at the center of the cutting tool; the tool holder is cylindrical, with a positioning pin at one end that can match the positioning hole, and a handle at the other end of the tool holder; a dial indicator slot is provided on the cylindrical surface of the tool holder; the dial indicator is fixed on a positioning block that can match the dial indicator slot, and a measuring needle is provided at one end of the positioning block.

[0005] Furthermore, the tool surface is also provided with a limiting groove, and the positioning block can slide within the limiting groove.

[0006] Furthermore, the measuring needle is hinged to the positioning block. When measuring, the measuring needle is parallel to the plane where the tool is located, and when the tool is machining, the measuring needle is perpendicular to the plane where the tool is located.

[0007] Furthermore, the minimum measuring range of the dial indicator is 0.002 mm.

[0008] Furthermore, the handle is also equipped with a keyway.

[0009] Furthermore, the line connecting the keyway and the dial indicator slot is parallel to the center line of the tool holder.

[0010] A high-precision tooth-fitting phase alignment measurement method includes the following steps:

[0011] S1. Install the device of the present invention on a CNC gear hobbing machine tool;

[0012] S2 manually rotates the tool axis on the machine tool, causing the measuring needle 302 to align with the center of two tooth grooves on the part, and records the tool axis coordinates displayed on the CNC machine tool screen. These coordinates are the origin coordinates.

[0013] S3 manually moves the tool axis, causing the dial indicator to move left and right and back and forth, and records the left and right and back and forth movement values ​​respectively;

[0014] S4 uses the data from step S3 as the feed parameters during machining, and then ends.

[0015] The beneficial effects of this invention are as follows:

[0016] This invention breaks through the existing single-function functions and technologies. Existing gear shaping machine tools only have the C1 / C2 axis linkage of the machine tool spindle, that is, the linkage action of the tool axis and the workpiece axis. They do not have the function and device for phase gear splitting. After the workpiece is finished and disassembled, it is impossible to re-set the tool or repeat the positioning and re-processing. Therefore, the processing is monotonous and wastes blanks. These problems need to be solved. First, a gear shaping tool with a precision dial indicator is designed to identify the phase angle with high precision during flexible clamping. It can accurately perform secondary processing of gears, and then achieve the beneficial effects of high quality, high efficiency and energy saving. It not only improves the productivity and quality, but also reduces time costs, which is beneficial for trial production and mass production. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the device of the present invention.

[0018] Figure 2 This is a schematic diagram of the measurement process using the device of the present invention.

[0019] In the picture:

[0020] A. Tooth tip, B. Tooth bottom, C. First tooth surface, D. Second tooth surface, 1. Cutting tool, 2. Tool holder, 3. Dial indicator, 101. Machining tooth, 102. Positioning hole, 103. Limiting groove, 201. Positioning pin, 202. Handle, 203. Dial indicator slot, 204. Keyway, 301. Positioning block, 302. Measuring needle. Detailed Implementation

[0021] It should be noted that in the description of this invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", 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 invention 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.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; a connection can be a mechanical connection or an electrical connection; a link can be a direct connection or an indirect connection through an intermediate medium, and can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] A high-precision gear-shaping phase alignment machining device includes: a cutting tool 1, a tool holder 2, and a dial indicator 3.

[0024] The tool 1 is disc-shaped, with machining teeth 101 evenly distributed on its circumference, and a positioning hole 102 is provided at the center of the tool;

[0025] The tool holder 2 is cylindrical. One end of the tool holder 2 is provided with a positioning pin 201, which can match the positioning hole 102. The other end of the tool holder 2 is provided with a handle 202. A dial indicator slot 203 is provided on the cylindrical surface of the tool holder 2.

[0026] The dial indicator 3 is fixed on the positioning block 301, which can match the dial indicator slot 203. One end of the positioning block 301 is provided with a measuring needle 302.

[0027] Furthermore, the surface of the cutting tool 1 is also provided with a limiting groove 103, and the positioning block 301 can slide within the limiting groove 103.

[0028] Furthermore, the measuring needle 302 is hinged to the positioning block 301. When measuring, the measuring needle 302 is parallel to the plane where the tool 1 is located, and when the tool 1 is machining, the measuring needle 302 is perpendicular to the plane where the tool 1 is located.

[0029] Furthermore, the minimum measuring range of dial indicator 3 is 0.002 mm.

[0030] Furthermore, the tool holder 2 is also provided with a keyway 204.

[0031] Furthermore, the line connecting the keyway 204 and the dial indicator slot 203 is parallel to the center line of the tool holder 2.

[0032] A high-precision method for measuring the phase alignment of tooth fittings:

[0033] S1. Install the device of the present invention on a CNC gear hobbing machine tool;

[0034] S2 manually rotates the tool axis on the machine tool, causing the measuring needle 302 to align with the center of two tooth grooves on the part, and records the tool axis coordinates displayed on the CNC machine tool screen. These coordinates are the origin coordinates.

[0035] S3 manually moves the tool axis, causing the dial indicator to move left and right and back and forth, and records the left and right and back and forth movement values ​​respectively;

[0036] S4 uses the data from step S3 as the feed parameters during machining, and then ends.

[0037] In principle, gear shaping is equivalent to the meshing of a pair of spur gears. The gear shaper cutter acts as a gear with a rake angle and clearance angle ground onto it to form the cutting edge, while the gear blank serves as the other gear. During gear shaping, the cutter moves at high speed along the workpiece axis, forming the main cutting motion. Simultaneously, it meshes with the workpiece without backlash, machining all the tooth profiles on the workpiece. Achieving backlash-free meshing accuracy after disassembling and re-clamping the parts is extremely difficult; therefore, a special cutting tool is needed to accomplish this.

[0038] This invention includes a dial indicator 3 with a scale of 0.002mm installed on the gear shaping tool holder 2. Its function is to measure the tooth groove width and tooth root depth. The tool 1 is installed as follows: The positioning pin 201 on the tool holder 2 is used to position the positioning hole 102 on the tool 1, and it is fixed with bolts. The dial indicator 3 is placed in the dial indicator slot 203 of the tool holder 2. The dial indicator 3 is retractable within the dial indicator slot 203 and moves along the limiting groove 103 to avoid interference during machining. Finally, the keyway 204 at the upper end of the tool holder 2 is aligned with the machine tool positioning pin for installation. The positioning pin 201, dial indicator 3, and keyway 204 at the upper end of the tool holder 2 are all in a straight line.

[0039] Technical Solution Operation Method: After mounting tool 1 on the CNC gear shaping machine, manually rotate the machine tool's tool axis, aligning the measuring needle 302 with the centers of two tooth grooves on the part. Record the tool axis coordinates displayed on the CNC machine tool screen; these are the origin coordinates. Move the tool axis via the machine tool handle, driving the dial indicator left-right and back-forward movements, recording the left-right and back-forward movement values ​​respectively. These values ​​serve as the feed parameters and machining depth during processing, completing the finishing program editing. (Note: The dial indicator scale is 0.002mm, with each small division representing 0.002mm, resulting in very high precision and accurate location of the tooth grooves on the part.)

[0040] This invention can reduce mechanical errors by assembling the dial indicator and the cutting tool together and making them move synchronously, which can reduce the cumulative mechanical errors caused by a single measurement.

[0041] This method replaces the original single-phase tooth division method, which involves measuring the starting angle of the cutting tool and then measuring the angle of the tooth groove on the part. The machine tool spindle is then adjusted to make the two values ​​roughly correspond, allowing for multi-part debugging.

[0042] Ensuring a high production qualification rate allows for single-piece debugging to meet technical requirements, significantly reducing the debugging costs of raw materials and the time cost of repeated debugging.

[0043] Compared to the original machining method, which involved moving the tool's tooth grooves to the original edge of the workpiece for finishing, and using visual inspection to align the phase angle, resulting in extremely poor machining accuracy and a very high scrap rate, this technology offers a modified tool and machining method. A dial indicator for phase angle measurement is mounted on the tool holder, with strict installation precision required between the dial indicator and the tool's positioning pin (limiting structure). The machining method utilizes the machine tool's inherent capabilities to lock the workpiece axis in place. The measuring structure (dial indicator) on the tool axis rotates slowly left and right. When the dial indicator pointer contacts the workpiece tooth groove, the pointer rotation is controlled to be no more than one small division (0.002mm). Measurements are taken sequentially left and right, and the values ​​are recorded as programming data. The same method is applied to the tooth tip and tooth root. This machining method produces parts with excellent accuracy, fully meeting technical requirements, significantly improving productivity, and reducing the time and cost of repeated adjustments and material waste.

[0044] Points to be protected:

[0045] The mechanical structure of this invention modifies the original tool body to precisely install a dial indicator.

[0046] The installation method of the dial indicator, the tool and tool holder have a specific positioning structure (limiting structure), and the dial indicator can be rotated.

[0047] The improved machining scheme achieves phase angle tooth division by integrating the cutting tool and measuring tool, which is more accurate and faster than the original method.

[0048] The flexible use of the measuring structure (dial indicator) and the special installation method allow it to rotate to avoid collisions and can be integrated with the cutting tool, eliminating the need for repeated disassembly during processing.

[0049] In terms of mechanical structure, a precision mandrel provided with the machine tool is used as a carrier, or other cylindrical shafts are used as carriers, and a dial indicator or dial gauge is installed to perform phase angle tooth division.

[0050] Regarding the processing solutions, the first option is to use a separate processing method, replacing gear hobbing with other machine tools. The second option is to create simple fixtures to fix the parts, and complete the processing by measuring the phase angle of the parts and adjusting multiple parts. However, this method results in a high scrap rate for the parts.

[0051] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention, and within the spirit and principles of the present invention, should be included within the scope of protection of the present invention. Furthermore, all content not described in detail in this specification is prior art known to those skilled in the art.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. A high-precision gear-shaping phase alignment machining device, characterized in that, include: The tool, tool holder, and dial indicator are provided. The tool is disc-shaped with evenly distributed machining teeth on its circumference and a positioning hole in its center. The tool holder is cylindrical with a positioning pin at one end that matches the positioning hole, and a handle at the other end. A dial indicator slot is provided on the cylindrical surface of the tool holder. The dial indicator is fixed on a positioning block that matches the dial indicator slot, and a measuring needle is provided at one end of the positioning block.

2. The high-precision gear-shaping phase alignment machining device as described in claim 1, characterized in that, The tool surface is also provided with a limiting groove, and the positioning block can slide within the limiting groove.

3. The high-precision gear-shaping phase alignment machining device as described in claim 1, characterized in that, The measuring needle is hinged to the positioning block. When measuring, the measuring needle is parallel to the plane where the tool is located. When the tool is machining, the measuring needle is perpendicular to the plane where the tool is located.

4. The high-precision gear-shaping phase alignment machining device as described in claim 1, characterized in that, The minimum range of the dial indicator is 0.002 mm.

5. The high-precision gear-shaping phase alignment machining device as described in claim 1, characterized in that, The handle also has a keyway.

6. The high-precision gear-shaping phase alignment machining device as described in claim 5, characterized in that, The line connecting the keyway and the dial indicator slot is parallel to the center line of the tool holder.

7. A measurement method using the high-precision gear-shaping phase alignment machining device as described in claim 1, characterized in that, Includes the following steps: S1 installs the device on a CNC gear hobbing machine tool; S2 manually rotates the tool axis on the machine tool, driving the calibration pin to align with the center of two tooth grooves on the part, and records the tool axis coordinates displayed on the CNC machine tool screen. These coordinates are the origin coordinates. S3 manually moves the tool axis, causing the dial indicator to move left and right and back and forth, and records the left and right and back and forth movement values ​​respectively; S4 uses the data from step S3 as the feed parameters during machining, and then ends.

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